For the purpose of providing an image display device (1) and a program capable of smoothly and efficiently grasping the state of an object from an echogram (64), an image display device (1) is provided with a storage image generation unit (21a) which generates and stores a storage image from echo data obtained by receiving a reflected wave of a transmitted wave and having a reflection intensity within a predetermined upper limit value and a lower limit value, and an image display unit (50) (i.e., user terminal) which displays the echogram (64) of the storage image in a color tone corresponding to a user's operation out of a plurality of color tones.
G01S 15/96 - Systèmes sonar, spécialement adaptés à des applications spécifiques pour repérer du poisson
G01S 7/539 - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe utilisant l'analyse du signal d'écho pour la caractérisation de la cibleSignature de cibleSurface équivalente de cible
ANTENNA DEVICE, TRANSMITTER, AND RADAR Various apparatus for providing an antenna device capable of achieving wide bandwidth are disclosed. The antenna device includes a dielectric substrate and a conductor pattern formed on the dielectric substrate. Herein, the conductor pattern includes an antenna array including a plurality of patch antennas connected in series, an input/output line feeding the antenna array, and a junction. The junction is interposed between the input/output line and a first patch antenna from the plurality of patch antennas located at an end of the antenna array connected to the input/output line. The junction is narrower than the first patch antenna and wider than a transmission line connecting adjacent patch antennas in the antenna array. (FIG. 2)
A sonar device including reception circuitry and processing circuitry is disclosed. The reception circuitry acquires sonar data from one or more targets in an underwater environment. The processing circuitry includes a target detector, a first noise filter, a second noise filter, and a selector. The target detector generates a binary mask that indicates presence or absence of target based on the sonar data. The first and second noise filters receive the sonar data, perform first and second noise filtering on the sonar data to reduce noise in the sonar data respectively, and output first and second filtered sonar data respectively. The first noise filtering is based on a first threshold. The second noise filtering is based on a second threshold different from the first threshold. The selector selects one of the first filtered sonar data and the second filtered sonar data as output based on the binary mask.
RADAR DEVICE, ECHO IMAGE GENERATION METHOD AND ECHO IMAGE GENERATION PROGRAM For the purpose of generating an echo image showing a more accurate detection result of an object, a radar device (101) is provided with: an acquisition unit that acquires echo data indicating a correspondence relationship between a position in a detection object area and the level of a reflected wave reflected at the position by an electromagnetic wave transmitted via an antenna (11); a detection unit that detects an object based on the echo data; a land determination unit that determines whether or not the object is on land based on the area of the object; a port determination unit that determines whether or not the position of the vessel (1) is in a port based on the distance (D) between the vessel (1) and the land; a threshold determination unit that determines a threshold for the level of the reflected wave according to the determination result of whether or not the vessel (1) is in a port; and a generation unit that generates an echo image based on the threshold and the echo data. (FIG. 1)
A swimming speed measuring device (1) including a transducer (2), a radial velocity calculating module (13), a distance derivative calculating module (14), and a swimming speed calculating module (15) is disclosed. The transducer (2) is configured to generate echo signals based on ultrasonic pings that are periodically emitted into water and reflected by a swimming object swimming in the water. The radial velocity calculating module (13) is configured to calculate a radial velocity of the swimming object based on a phase difference between two of the echo signals. The distance derivative calculating module (14) is configured to calculate a first derivative of a distance between the swimming object and the transducer with respect to time based on the two echo signals. The swimming speed calculating module (15) is configured to calculate a swimming speed of the swimming object based on the radial velocity and the first derivative of the distance.
G01P 5/24 - Mesure de la vitesse des fluides, p. ex. d'un courant atmosphériqueMesure de la vitesse de corps, p. ex. navires, aéronefs, par rapport à des fluides en mesurant l'influence directe du courant de fluide sur les propriétés d'une onde acoustique de détection
G01S 15/96 - Systèmes sonar, spécialement adaptés à des applications spécifiques pour repérer du poisson
For the purpose of providing a transducer (203) capable of improving assemblability, a plurality of transceiver units (1), each of the transceiver units (1) comprises a sound absorber (52, 53), a plurality of transducer elements (2) arranged on the sound absorber (52, 53) in an arcuate shape and with the transmitting and receiving surfaces facing outward in the arcuate radial direction, and a flexible substrate (3, 4) having a plurality of junctions (33, 43) connected to the first connection surfaces (22) of a pair of connection surfaces facing the arcuate axial direction of the plurality of transducer elements (2).
G10K 11/35 - Procédés ou dispositifs pour transmettre, conduire ou diriger le son pour focaliser ou pour diriger le son, p. ex. balayage utilisant la commande mécanique de transducteurs
7.
COMPUTER PROGRAM, INFORMATION PROCESSING DEVICE, AND INFORMATION PROCESSING METHOD
[Problem] To provide a computer program, an information processing device, and an information processing method for improving calculation efficiency of fluid analysis. [Solution] This computer program causes a computer to calculate a temporal change in the physical quantity of a fluid accompanying movement of an object in the fluid. The computer program causes the computer to execute processing of: creating a background mesh and a detailed mesh; using a learning model trained so that when the physical quantity of the fluid at a first time point in each cell of the background mesh or the detailed mesh is input, the physical quantity is output in each cell at a second time point after a prescribed time; and calculating a temporal change in the physical quantity in a prescribed range of the fluid on the basis of connections of the background mesh and the detailed mesh, and the calculation using the learning model.
G06F 30/27 - Optimisation, vérification ou simulation de l’objet conçu utilisant l’apprentissage automatique, p. ex. l’intelligence artificielle, les réseaux neuronaux, les machines à support de vecteur [MSV] ou l’apprentissage d’un modèle
B63B 79/20 - Surveillance des caractéristiques ou des paramètres de fonctionnement des navires en opération utilisant des modèles ou la simulation, p. ex. des modèles statistiques ou des modèles stochastiques
G06F 30/23 - Optimisation, vérification ou simulation de l’objet conçu utilisant les méthodes des éléments finis [MEF] ou les méthodes à différences finies [MDF]
8.
SHIP CONTROL DEVICE, SHIP CONTROL METHOD, AND COMPUTER READABLE MEDIUM
A ship control device includes an input unit, an operation monitoring unit, and a ship holding unit. The input unit is inputted with an operating position of a ship operator for controlling the moving direction or propulsion of the ship. The operation monitoring unit detects an operation stationary state in which the operating position of the ship is unchanged for a predetermined time based on the time variation of the operating position of the ship. When the ship holding condition, including the detection of the operation stationary state, is satisfied, the ship holding unit performs ship holding control to hold the behavior of the ship.
[Problem] To provide a weather observation device, a weather observation system, an estimation method, a training method, and a computer program that can eliminate the necessity of periodic calibration. [Solution] This weather observation device comprises: an observation data acquisition unit for acquiring observation data on the basis of radio waves received by a microwave radiometer at an observation point; and a derivation unit for using, as first training data, reference brightness temperature data generated on the basis of atmospheric data pertaining to weather, and observation data obtained from the microwave radiometer, and deriving estimated brightness temperature data corresponding to the observation data by means of a first learning model trained to output estimated brightness temperature data when the observation data is input.
For the purpose of highly accurately predicting the amount of marine fishery resources in a wide sea area including a time different from the present time in the future or the like, a marine fishery resource amount prediction device (10) includes a fish group observation information acquisition unit (20) that acquires fish group observation information in a predetermined sea area; a sea condition prediction information acquisition unit (30) that acquires sea condition prediction information in a prediction target sea area including a predetermined sea area; and a prediction information calculation unit (40) that calculates the marine fishery resource amount prediction information in the prediction target sea area based on the fish group observation information and the sea condition prediction information.
G06Q 10/04 - Prévision ou optimisation spécialement adaptées à des fins administratives ou de gestion, p. ex. programmation linéaire ou "problème d’optimisation des stocks"
A navigation assistance system includes a navigation assistance device installed on a ship and a remote monitoring device installed outside the ship. The navigation assistance device includes processing circuitry configured to: acquire navigation-related data related to navigation of the ship; calculate an assistance necessity level indicating a degree to which the ship requires assistance from outside, based on the navigation-related data; and transmit the assistance necessity level to outside of the ship. The remote monitoring device includes processing circuitry configured to receive the assistance necessity level transmitted by the navigation assistance device.
A radar apparatus (201) includes a transmission unit (13), a reception unit (31), a display signal generation unit (32), and a control unit (15). The transmission unit (13) transmits a first pulse signal (Ps1), which is a pulse signal having a specific pulse width, and a second pulse signal (Ps2), which is a pulse signal having a pulse width wider than the pulse width of the first pulse signal (Ps1). The reception unit (31) receives a reflected signal (Rs) from which the pulse signal is reflected. The display signal generation unit (32) generates a display signal based on the reflected signal (Rs). The control unit (15) performs a first control to control a transmission power of the pulse signal such that a transmission power (Pt1) of the first pulse signal (Ps1) is greater than a transmission power (Pt2) of the second pulse signal (Ps2).
[Problem] To provide an information processing device, an information processing method, and a computer program that contribute to the realization of appropriate automatic navigation of a waterborne moving body. [Solution] An information processing device comprising: an interface unit that inputs a ship-handling instruction from an operator as linguistic data; a current status acquisition unit that acquires sea condition data indicating the operating status of a waterborne moving body to be operated; a command output unit that, when the sea condition data and the linguistic data are input, outputs command data using a learning model that outputs command data that conforms to the instruction of the linguistic data according to the status indicated by the sea condition data; and a control output unit that outputs control data for operating and controlling the waterborne moving body on the basis of the output of the learning model.
A detection apparatus, which is used for detecting aquatic organisms in a water area. The detection apparatus comprises: a plurality of detection units, which send transmitted signals into water and receive reflected signals of the transmitted signals, which reflected signals are reflected by aquatic organisms; and a control portion, which is used for controlling the detection units, wherein each detection unit has a transceiving period for sending a transmitted signal and receiving a reflected signal, and the control unit controls the detection units in a manner in which the transceiving periods of the detection units do not temporally overlap with each other, or the control unit controls the detection units in a manner in which the detection units synchronously send and receive signals, and the detection units send transmitted signals with different frequencies on the same occasion and only receive reflected signals of the transmitted signals. (FIG. 5)
A monitoring apparatus (10) for aquatic organisms, which monitors the distribution of aquatic organisms within a monitored water area. The monitoring apparatus (10) comprises: an acoustic sensor (1), which emits an ultrasonic beam into water and receives reflected wave signals from aquatic organisms; an aquatic organism counting unit (2), which counts the aquatic organisms within a detection range of the acoustic sensor on the basis of the reflected wave signals; a detection region area calculation unit (3), which calculates a beam width at a predetermined depth on the basis of an extension angle of the ultrasonic beam, and calculates the area of a detection region at the predetermined depth on the basis of the beam width; and a living density calculation unit (4), which calculates, on the basis of the number of aquatic organisms counted and the area of the detection region, a density distribution of the aquatic organisms within the range of the monitored water area.
[Problem] To provide a computer program, a sea condition predicting device, and a sea condition prediction method that implement prediction reflecting actual observation data while reducing a calculation load. [Solution] This computer program causes a computer to execute processing for: acquiring observation data at an observation position from a device that makes observations at the surface of the sea or underwater; acquiring predicted sea condition data obtained by predicting the sea conditions at the time of observation at a plurality of positions included in a sea area including the observation position; and outputting predicted sea condition data a predetermined period of time after the observation time point of the observation data corresponding to the observation data acquired from the device, by using a learning model that has been trained to output second predicted sea condition data at a second time point a predetermined period of time after a first time point, upon receiving input of the observation data acquired from the device at the first time point and first predicted sea condition data obtained by predicting the sea condition at the first time point.
B63B 79/15 - Surveillance des caractéristiques ou des paramètres de fonctionnement des navires en opération utilisant des capteurs, p. ex. des capteurs de pression, des jauges de contrainte ou des accéléromètres pour la surveillance des variables environnementales, p. ex. de la hauteur des vagues ou des données météorologiques
G06N 3/04 - Architecture, p. ex. topologie d'interconnexion
17.
UNDERWATER ACOUSTIC COMMUNICATION SYSTEM, CLOCK CALIBRATION METHOD, WAVE TRANSMISSION/RECEPTION UNIT, AND PROGRAM
[Problem] To provide an underwater acoustic communication system capable of realizing clock calibration by wireless means. [Solution] This underwater acoustic communication system comprises: a first wave transmission/reception unit which comprises a clock part and is configured so as to transmit a first ultrasound message at a first clock time measured in the clock part; and a second wave transmission/reception unit which is configured so as to receive the first ultrasound message, acquire a second clock time at which the first ultrasound message was received, calculate one-way propagation time between the first clock time and the second clock time, and transmit a second ultrasound message including the one-way propagation time. The first wave transmission/reception unit is further configured so as to: receive the second ultrasound message; extract the one-way propagation time from the second ultrasound message; acquire a third clock time at which the second ultrasound message was received and which is measured in the clock part; calculate a round propagation time between the first clock time and the third clock time; and adjust the clock time of the clock part on the basis of the one-way propagation time and the round propagation time.
G01S 11/14 - Systèmes pour déterminer la distance ou la vitesse sans utiliser la réflexion ou la reradiation utilisant des ondes ultrasonores, sonores ou infrasonores
G01S 1/74 - Radiophares ou systèmes de balisage émettant des signaux ayant une ou des caractéristiques pouvant être détectées par des récepteurs non directionnels et définissant des directions, situations ou lignes de position déterminées par rapport aux émetteurs de radiophareRécepteurs travaillant avec ces systèmes utilisant des ondes ultrasonores, sonores ou infrasonores Détails
G01S 15/74 - Systèmes utilisant la reradiation d'ondes acoustiques, p. ex. pour l'identification ami–ennemi
18.
SPEED MEASURING APPARATUS, SPEED MEASURING METHOD, AND SPEED MEASURING PROGRAM
G01C 21/16 - NavigationInstruments de navigation non prévus dans les groupes en utilisant des mesures de la vitesse ou de l'accélération exécutées à bord de l'objet navigantNavigation à l'estime en intégrant l'accélération ou la vitesse, c.-à-d. navigation par inertie
A weather information providing system (100) comprises an acquisition unit (104) is configured to acquire a first image (116) including one or more target objects (118) taken in a first direction from a first known location. Further, a calculation unit (106) is configured to calculate a distance between the first known location and the one or more target objects (118). Further, a discrimination unit (108) is configured to determine whether the one or more target objects (118) in the first image (116) is recognizable from the first known location. Further, processing circuitry (110) is configured to generate a plurality of contour lines (404) from a recognizable target object (302), to form a plurality of vectors (602). The processing circuitry (110) is configured to generate a heat map (700) from the plurality of vectors (602) and estimate a source position of smog from the heat map (700).
G06F 18/21 - Conception ou mise en place de systèmes ou de techniquesExtraction de caractéristiques dans l'espace des caractéristiquesSéparation aveugle de sources
A positioning device (1) includes an acquisition unit (32), a conversion unit (33), a generation unit (34), and an output unit (35). The acquisition unit (32) acquires a geodetic antenna position in the geodetic coordinates, which corresponds to an antenna position. The geodetic antenna position is calculated based on a GNSS signal received by an antenna (5) mounted on a mobile body. The conversion unit (33) converts an offset amount in the mobile body coordinates, corresponding to a position difference between a reference position on the mobile body and the position of the antenna on the mobile body, into a geodetic offset amount, which is an offset amount of the geodetic coordinates, based on an attitude angle of local coordinates on the mobile body. The generation unit (34) generates a corrected position obtained by correcting the geodetic antenna position by adding the geodetic offset amount to the geodetic antenna position. The output unit (35) outputs the generated corrected position to an output target (100) as a positioning result.
G05D 1/00 - Commande de la position, du cap, de l'altitude ou de l'attitude des véhicules terrestres, aquatiques, aériens ou spatiaux, p. ex. utilisant des pilotes automatiques
G01C 21/16 - NavigationInstruments de navigation non prévus dans les groupes en utilisant des mesures de la vitesse ou de l'accélération exécutées à bord de l'objet navigantNavigation à l'estime en intégrant l'accélération ou la vitesse, c.-à-d. navigation par inertie
G01S 19/14 - Récepteurs spécialement adaptés pour des applications spécifiques
21.
NAVIGATION ASSIST SYSTEM, NAVIGATION ASSIST METHOD, AND PROGRAM
The navigation assist system is provided with: a movable body data interface configured to acquire movable body data including position and speed of a movable body moving on water; a target data interface configured to acquire target data including the position and the speed of a plurality of targets existing respectively around the movable body; an avoidance target selector configured to select one or the plurality of targets having collision risks of colliding with the movable body; and an evasion route generator configured to generate an evasion route of the movable body based on the selected targets.
B63B 43/18 - Amélioration de la sécurité des navires, p. ex. contrôle des avaries, non prévue ailleurs par prévention des abordagesAmélioration de la sécurité des navires, p. ex. contrôle des avaries, non prévue ailleurs par réduction des dommages dus aux abordages
B63B 49/00 - Aménagements relatifs aux instruments nautiques ou d'aide à la navigation
A navigation planning system and method can comprise: acquiring a planned route indicating a navigation planning route of a movable body on a water; acquiring movable body information including a position, a moving direction, and a speed of the movable body; acquiring obstacle information including a position, a moving direction, and a speed of one or a plurality of obstacles around the movable body; and calculating a collision risk value indicating a risk level of collision between the movable body and an obstacle from the plurality of obstacles based on the movable body information and the obstacle information, and determining necessity of evasion based on the collision risk value and a threshold value. In the case of necessity of evasion, the system can set an evasion route whose end point is not on the planned route and whose direction at the end point is in a predetermined direction.
A sonar transducer assembly to be used in an underwater environment is disclosed. The sonar transducer assembly includes a housing, a chassis, an ultrasonic transducer, circuitry, and a heat sink. The housing is in contact with the underwater environment. The chassis is within the housing. The ultrasonic transducer is disposed within the housing to transmit an ultrasonic transmission wave to the underwater environment and receive an ultrasonic reflection wave from the underwater environment. The circuitry is disposed within the housing and in communication with the ultrasonic transducer. The heat sink is disposed within the housing and coupled to the circuitry and the chassis to dissipate heat from the circuitry.
A sonar device including reception circuitry and processing circuitry is disclosed. The reception circuitry acquires sonar data from one or more targets in an underwater environment. The processing circuitry includes a target detector, a first noise filter, a second noise filter, and a selector. The target detector generates a binary mask that indicates presence or absence of target based on the sonar data. The first and second noise filters receive the sonar data, perform first and second noise filtering on the sonar data to reduce noise in the sonar data respectively, and output first and second filtered sonar data respectively. The first noise filtering is based on a first threshold. The second noise filtering is based on a second threshold different from the first threshold. The selector selects one of the first filtered sonar data and the second filtered sonar data as output based on the binary mask.
An ultrasonic device (1) including an ultrasonic transducer (10), a fish echo tracking module (32), a fish speed calculation module (33), an ultrasound incidence angle calculation module (34), and an angle adjustment module (35) is disclosed. The ultrasonic transducer sequentially transmits a plurality of transmission waves toward a fish and generates an echo signal for each of the plurality of transmission waves. The fish echo tracking module tracks in time an echo of the fish from the echo signals. The fish speed calculation module calculates a swimming speed of the tracked fish from the tracked echoes of the fish. The ultrasound incidence angle calculation module calculates an ultrasound incidence angle of the plurality of transmission waves on the tracked fish based on a position of the fish relative to the ultrasonic transducer. The angle adjustment module adjusts the ultrasound incidence angle based on the swimming speed of the fish.
A sonar system including a transducer and processing circuitry is disclosed. The transducer receives an ultrasonic reflection wave corresponding to a reflection of an ultrasonic transmission wave on an underwater object and generates a return signal based on the ultrasonic reflection wave. The processing circuitry generates reception beams making different angles with the horizontal direction by performing a beamforming process based on the return signal. The processing circuitry generates reception beam data for each reception beam, detects targets within the reception beam data, and creates a list of the detected targets. Each target is defined by a range associated with the transducer and an angle of corresponding reception beam on which the target is detected. The processing circuitry generates the sonar image by placing a predetermined graphical image for each target in the list at a position calculated based on the range and the angle of the target.
The ship control device includes processing circuitry. The processing circuitry sets a throttle position based on a tilt state of an operation device operated by a user, sets an upper limit value of the throttle position based on a rotational state of the first operation device, and generates a throttle command signal based on the throttle position and the upper limit value, to easily adjust a propulsion force while using a joystick.
B63B 79/40 - Surveillance des caractéristiques ou des paramètres de fonctionnement des navires en opération pour le suivi des operations des navires, p. ex. le suivi de leur vitesse, de leur itinéraire ou de leur calendrier d’entretien
B63H 21/21 - Moyens de commande du moteur ou de la transmission spécialement adaptés à l'utilisation à bord d'un navire
B63H 25/04 - Moyens amorçant la gouverne à fonctionnement automatique, p. ex. asservis au compas
B63H 25/06 - GouverneRalentissement par d'autres moyens que les éléments propulsifsAncrage dynamique, c.-à-d. positionnement des navires au moyen d'éléments de propulsion auxiliaires ou principaux gouvernant par gouvernails
The present disclosure provides a target object detection device. The target object detection device includes a first transmission signal generator, a first transmission array, a first switch, and a controller. The first transmission signal generator is configured to generate a first transmission signal. The first transmission array includes a plurality of first transmission elements configured to convert the first transmission signal into a transmission wave. The first switch is configured to supply the first transmission signal to one of the first transmission elements in the first transmission array. The controller is configured to control the first switch to switch the first transmission element to which the first transmission signal is supplied from a first element to a second element at a first timing.
NAVIGATION DEVICE, NAVIGATION SYSTEM, NAVIGATION METHOD, AND NAVIGATION PROGRAM The navigation device (10) mounted on a ship is provided with a receiving unit (20), a calculating unit (30), an evaluation unit (40), and a determination unit (50). The receiving unit (20) receives a start position and a destination position associated with the ship. The calculating unit (30) calculates a reversal route from the destination position towards the start position. Further, the evaluation unit (40) evaluates a possibility of generation of the reversal route from the destination position to the start position. Finally, the determination unit (50) determines that the destination position is within a non-navigable area when there is no possibility of the generation of the reversal route.
A target detection device is provided. The target detection device includes a transmission array having a plurality of transmission transducer elements. The target detection device further includes a signal generator. The signal generator generates a plurality of transmission signals. The signal generator further changes a phase of a base signal by a phase shift amount that changes over time for generating each of the plurality of transmission signals. Furthermore, the signal generator provides inputs to each transmission transducer element of the plurality of transmission transducer elements with one of the plurality of transmission signals.
A navigation assistance device includes a ship state detection sensor and processing circuitry. The sensor detects a ship position, a ship speed, and a bow azimuth. The processing circuitry detects a quay line of a quay where a ship is docked. The processing circuitry calculates a quay direction velocity based on the ship speed, bow azimuth, and quay line. The processing circuitry calculates a distance between the ship and the quay line based on the ship position and quay line. The processing circuitry calculates an arrival state including at least one of a predicted time of arrival at the quay of the ship, a predicted speed of the ship at arrival at the quay, and a drift angle of the ship at arrival at the quay, based on the quay direction velocity and the distance between the ship and the quay line.
To generate an optimal route for ships with high accuracy. The navigation device (10) is provided with an acquiring unit (20), a receiving unit (40), a determination unit (51), and a route generation unit (50). The acquiring unit (20) acquires a recommended route connecting two or more waypoints on a chart. Further, the receiving unit (40) receives a start point and an end point to generate an optimal route for a ship. Furthermore, the determination unit (51) determines a cost associated with a plurality of routes and a cost associated with the recommended route. Finally, a route generation unit (50) generates the optimal route between the start point and the end point based on the cost of the plurality of routes and the cost of recommended route.
The purpose is to highly accurately estimate information indicating a ship state up to the point of docking. A navigation assistance device includes a ship state detection sensor and processing circuitry. The ship state detection sensor detects a bow azimuth. The processing circuitry detects a quay line of a quay. The processing circuitry calculates a drift angle which is an angle formed between a bow stern direction of a ship and a direction in which the quay line extends, based on the bow azimuth and the quay line.
The purpose is to provide a dual-frequency fish finder, a dual-frequency transmission method, and a program capable of suppressing noise based on interference waves of other frequencies in an echo image of each frequency when transmission waves of two frequencies are transmitted. A dual-frequency fish finder includes a processing circuitry. The processing circuitry is configured to transmit a first frequency signal during a reception period of the second frequency signal in a second transmission cycle between a transmission timing of the second frequency signal and an ending timing of a reception period of the first frequency signal, and to transmit the second frequency signal, having a different frequency from the first frequency signal, during a reception period of the first frequency signal in a first transmission cycle between a transmission timing of the first frequency signal and an ending timing of a reception period of the second frequency signal.
G01S 7/527 - Extraction des signaux d'écho désirés
G01S 7/539 - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe utilisant l'analyse du signal d'écho pour la caractérisation de la cibleSignature de cibleSurface équivalente de cible
[Problem] To measure the distance between an arbitrary position and a hull in a video by means of an intuitive operation. [Solution] This navigation assistance device comprises a video data generation unit, a designation unit, a coordinate calculation unit, a distance calculation unit, an AR data generation unit, and a synthesis unit. The video data generation unit generates surrounding video data that shows the surroundings of a hull. The designation unit designates a designated position in the video based on the surrounding video data. The coordinate calculation unit calculates the coordinates of the designated position in a virtual space set in correspondence to the earth coordinate system. The distance calculation unit calculates the shortest distance between the hull and the designated position in the virtual space. The AR data generation unit generates AR data including the shortest-distance text data. The synthesis unit synthesizes the AR data and the surrounding video data.
[Problem] To suppress any deviation of the position of a marker on video due to movement of a hull. [Solution] This navigation assistance device comprises a video data generation unit, a designation unit, a coordinate calculation unit, a position measurement unit, a movement vector setting unit, and a correction unit. The video data generation unit generates surrounding video data of the hull. The designation unit designates a designated position on video based on the surrounding video data. The coordinate calculation unit calculates position coordinates within a virtual space corresponding to the designated position on the video. The position measurement unit is installed on the hull and measures an actual movement vector of the hull in an Earth coordinate system. The movement vector setting unit sets a virtual movement vector within the virtual space from the actual movement vector. The correction unit corrects the designated coordinates within the virtual space corresponding to the designated position on the basis of the virtual movement vector.
[Problem] To suppress dead zones in video data of the surroundings. [Solution] This navigation assistance device comprises a reference point setting unit and a video data generation unit. The reference point setting unit sets a reference point for stitching together bow video data containing video in the bow direction of a ship, port video data containing video in the port direction of the ship, and starboard video data containing video in the starboard direction of the ship. The video data generation unit generates surrounding video data by stitching together the bow video data, the port video data, and the starboard video data using an outline shape of the ship and the reference point.
[Problem] To generate a video with which a distance to a quay wall can be visually recognized with ease. [Solution] This navigation assistance device comprises a video data generation unit, an AR data generation unit, and a synthesis unit. The video data generation unit generates surrounding video data of a hull including the gunwale of the hull and the water surface outward from the gunwale. The AR data generation unit generates AR data including grid image data having a plurality of first grid lines arranged parallel to the gunwale and spaced apart from each other. The synthesis unit synthesizes the AR data and the surrounding video data so as to arrange the plurality of first grid lines on the basis of the gunwale in a region corresponding to the water surface.
A power distributor includes a dielectric substrate, a rectangular patch resonator, a first input terminal, a first output terminal, and a second output terminal. The rectangular patch resonator is configured to be formed on the dielectric substrate, having a width corresponding to ½ wavelength of a fundamental wave, having an input side and an output side mutually facing, extending in the width direction. The first input terminal is configured to be connected to a first side relative to a center of the input side. The first output terminal is configured to be connected to the first side relative to the center of the output side. The second output terminal is configured to be connected to a second side opposite to the first side relative to the center of the output side.
H01P 5/02 - Dispositifs de couplage du type guide d'ondes à coefficient de couplage invariable
H01P 5/12 - Dispositifs de couplage présentant au moins trois accès
H01Q 3/34 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la phase relative ou l’amplitude relative et l’énergie d’excitation entre plusieurs éléments rayonnants actifsDispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante faisant varier la phase par des moyens électriques
H01Q 21/08 - Réseaux d'unités d'antennes, de même polarisation, excitées individuellement et espacées entre elles les unités étant espacées le long du trajet rectiligne ou adjacent à celui-ci
40.
PROGRAM, INFORMATION PROCESSING METHOD, INFORMATION PROCESSING DEVICE, AND MODEL GENERATION METHOD
[Problem] To provide a program and the like capable of suitably estimating wind information. [Solution] This program causes a computer to execute processing for acquiring an image including a water surface, and estimating wind information by inputting the acquired image to a learning model that outputs wind information pertaining to wind when receiving the image. Preferably, the image is obtained by imaging a water surface around a ship and acquired in association with identification information about the ship. When the wind information is estimated, a combination of the estimated wind information and the identification information is stored at any time, and the wind information is output to a user terminal 2 corresponding to the identification information.
B63B 49/00 - Aménagements relatifs aux instruments nautiques ou d'aide à la navigation
B63B 79/40 - Surveillance des caractéristiques ou des paramètres de fonctionnement des navires en opération pour le suivi des operations des navires, p. ex. le suivi de leur vitesse, de leur itinéraire ou de leur calendrier d’entretien
G01P 5/00 - Mesure de la vitesse des fluides, p. ex. d'un courant atmosphériqueMesure de la vitesse de corps, p. ex. navires, aéronefs, par rapport à des fluides
G01P 13/00 - Indication ou enregistrement de l'existence ou de l'absence d'un mouvementIndication ou enregistrement de la direction d'un mouvement
G06V 10/82 - Dispositions pour la reconnaissance ou la compréhension d’images ou de vidéos utilisant la reconnaissance de formes ou l’apprentissage automatique utilisant les réseaux neuronaux
41.
NAVIGATION PLANNING SYSTEM AND NAVIGATION PLANNING METHOD
A navigation planning system of the present invention comprises a processing circuitry configured to acquire planned route information indicating a movable body on the water; acquire movable body information including a position, a moving direction, and a speed of the movable body; acquire obstacle information including each of a position, a moving direction, and a speed of a plurality of obstacles located in the surrounding area of the movable body; calculate a collision risk indicating a risk level of collision between the movable body and the obstacle based on the movable body information and the obstacle information; calculate congestion risk indicating a degree of approaching a plurality of obstacles simultaneously based on each of the collision risk between the movable body and the obstacle; and determine the necessity of evasion by comparing the congestion risk with a threshold value.
B63B 79/40 - Surveillance des caractéristiques ou des paramètres de fonctionnement des navires en opération pour le suivi des operations des navires, p. ex. le suivi de leur vitesse, de leur itinéraire ou de leur calendrier d’entretien
G05D 1/02 - Commande de la position ou du cap par référence à un système à deux dimensions
42.
NAVIGATION PLANNING SYSTEM AND NAVIGATION PLANNING METHOD
A navigation planning system configured to acquire a planned route for a movable body on a water. Further, movable body information and obstacle information an obstacle located in a surrounding area of the movable body is acquired. Subsequently, an evasion route, different from the planned route is acquired. Further, a collision risk indicating a risk of collision between the movable body and the obstacle is calculated based on the movable body information and obstacle information. Furthermore, a maximum evasion route collision risk when the movable body travels on the evasion route and a maximum planned route collision risk the movable body travels on the planned route are obtained. Finally, the navigation planning system outputs a navigation route change signal indicating that the movable body change the planned route to the evasion route when the maximum evasion route collision risk is less than the maximum planned route collision risk.
B63B 43/18 - Amélioration de la sécurité des navires, p. ex. contrôle des avaries, non prévue ailleurs par prévention des abordagesAmélioration de la sécurité des navires, p. ex. contrôle des avaries, non prévue ailleurs par réduction des dommages dus aux abordages
B63B 49/00 - Aménagements relatifs aux instruments nautiques ou d'aide à la navigation
Embodiments of the present disclosure provide a measurement chip. The measurement chip may include a propagation layer configured to allow light to propagate in a propagation direction, an introductory part configured to introduce the light into the propagation layer, an outgoing part configured to outgo the light from the propagation layer, and a coating layer configured to be formed on a surface of the propagation layer. A length of a formed region of the coating layer in the propagating direction is increased or decreased along a direction perpendicular to the propagating direction. The length of the formed region of the coating layer is modifiable using a ligand that reacts with an analyte on the surface of the propagation layer at least in an exposed area that is exposed from the coating layer.
G01N 21/77 - Systèmes dans lesquels le matériau est soumis à une réaction chimique, le progrès ou le résultat de la réaction étant analysé en observant l'effet sur un réactif chimique
G01N 21/41 - RéfringencePropriétés liées à la phase, p. ex. longueur du chemin optique
44.
MEASUREMENT CHIP, MEASURING DEVICE AND MEASURING METHOD
Embodiments of present disclosure provide an optical waveguide type measurement chip with further improved measurement stability, a measurement device and a measurement method. The measurement chip comprises a propagation layer configured to allow light to propagate, an introductory part configured to have a first diffraction grating for introducing the light into the propagation layer, an outgoing part configured to have a second diffraction grating for deriving the light from the propagation layer, and a ligand modification surface configured to be a surface of the propagation layer and capable of modifying a ligand that reacts with an analyte be detected, wherein a period of a plurality of grating patterns formed in at least one of: the first diffraction grating, or the second diffraction grating, is different from each other between two or more regions.
G01N 21/77 - Systèmes dans lesquels le matériau est soumis à une réaction chimique, le progrès ou le résultat de la réaction étant analysé en observant l'effet sur un réactif chimique
G01N 33/543 - Tests immunologiquesTests faisant intervenir la formation de liaisons biospécifiquesMatériaux à cet effet avec un support insoluble pour l'immobilisation de composés immunochimiques
G02B 6/12 - Guides de lumièreDétails de structure de dispositions comprenant des guides de lumière et d'autres éléments optiques, p. ex. des moyens de couplage du type guide d'ondes optiques du genre à circuit intégré
G02B 6/124 - Lentilles géodésiques ou réseaux intégrés
45.
TARGET DETECTION DEVICE AND TARGET DETECTION METHOD
A target detection device (1) including a transmission signal generator (103), a transmission array (10), a switch (104), and a controller (101) is disclosed. The transmission signal generator (103) is configured to generate a transmission signal. The transmission array (10) comprising a plurality of transmission elements (11) is configured to convert the transmission signal into a transmission wave. The transmission array (10) has at least a start transmission element (11a) and an end transmission element (11b). The switch (104) is configured to supply the transmission signal to the plurality of transmission elements (11) sequentially from the start transmission element (11a) to the end transmission element (11b). The controller (101) is configured to control a sweep time of the switch (104). The sweep time is a time from the supply of the transmission signal to the start transmission element to the supply of the transmission signal to the end transmission element.
The object of the present invention is to effectively suppress an overshoot of a heading during turning. A ship control device is provided with processing circuitry. The processing circuitry measure an overshoot amount of a heading of the ship during turning based on an excessive turning amount of the heading with respect to a setting direction of the ship and calculates a rudder angle offset amount based on the overshoot amount.
B63B 79/40 - Surveillance des caractéristiques ou des paramètres de fonctionnement des navires en opération pour le suivi des operations des navires, p. ex. le suivi de leur vitesse, de leur itinéraire ou de leur calendrier d’entretien
B63B 79/10 - Surveillance des caractéristiques ou des paramètres de fonctionnement des navires en opération utilisant des capteurs, p. ex. des capteurs de pression, des jauges de contrainte ou des accéléromètres
B63H 25/04 - Moyens amorçant la gouverne à fonctionnement automatique, p. ex. asservis au compas
47.
UNDERWATER DETECTION DEVICE AND TRANSMISSION CONDITION OPTIMIZATION METHOD
An underwater detection device capable of simply and accurately optimizing a transmission condition of an ultrasonic oscillator included in a transducer is provided. The underwater detection device includes processing circuitry. The processing circuitry is configured to supply a transmission voltage and a transmission current to the ultrasonic oscillator, measure the transmission voltage, measure the transmission current, and optimize the transmission condition of the ultrasonic oscillator based on the measured transmission voltage and the measured transmission current.
A bandpass filter (includes a dielectric substrate, a first strip line formed on the dielectric substrate, resonators coupled to the first strip line, and a second strip line formed on the dielectric substrate coupled to the resonators. The resonators include a plurality of inductor elements formed on the dielectric substrate and composed of rectangular conductors having a long side direction and a short side direction, and a capacitor element for coupling the plurality of inductor elements and include a series resonance circuit composed of the plurality of inductor elements and the capacitor element. The length in the long side direction of the inductor element is less than half wavelength of the electromagnetic wave transmitted by the filter.
The navigation supporting device is provided with processing circuitry configured to: generate a plurality of candidate line segments for constituting a target based on point cloud data including a plurality of point clouds obtained by detecting surroundings of a ship. Based on a positional relationship between the ship and the plurality of candidate line segments, the processing circuitry selects an estimated line segment constituting the target from the plurality of candidate line segments. Further, the processing circuitry estimates the shape of the target based on the selected estimated line segment.
B63B 49/00 - Aménagements relatifs aux instruments nautiques ou d'aide à la navigation
B63B 79/40 - Surveillance des caractéristiques ou des paramètres de fonctionnement des navires en opération pour le suivi des operations des navires, p. ex. le suivi de leur vitesse, de leur itinéraire ou de leur calendrier d’entretien
G01S 17/42 - Mesure simultanée de la distance et d'autres coordonnées
G01S 17/89 - Systèmes lidar, spécialement adaptés pour des applications spécifiques pour la cartographie ou l'imagerie
G01S 17/93 - Systèmes lidar, spécialement adaptés pour des applications spécifiques pour prévenir les collisions
50.
MOBILE STRUCTURE TRACKING DEVICE, AUTOMATIC MOBILE STRUCTURE CONTROL SYSTEM, MOBILE STRUCTURE TRACKING METHOD, AND MOBILE STRUCTURE TRACKING PROGRAM
The mobile structure tracking device 10 includes an acquisition unit 20, an area setting unit 30, a selection unit 50, and a tracking unit 60. The acquisition unit 20 acquires point cloud data comprising a plurality of feature points obtained by ranging a surrounding environment including another ship with respect to an own ship. The area setting unit 30 sets individual areas for the plurality of feature points based on a distribution of positions of the plurality of feature points. Further, the selection unit 50 selects the target tracking ship based on the size of the individual areas. Furthermore, the tracking unit 60 generates tracking data based on a time-series change of the positions of the target tracking ship.
A pre-heating unit (PH) 100 comprises a heater (101), a PH-body (102), a tube-like flow path (103), a heat conductor (104), and a cover (105). The PH-body (102) is heated by the heater (101). The tube-like flow path (103) is arranged in a groove (102a) and allows a liquid to flow. The groove (102a) is formed by extending in an axial direction with respect to an external peripheral surface (102b). The heat conductor (104) comprises a metal member covering the external peripheral surface (102b) and the tube-like flow path (103). The cover comprises an elastic member covering the heat conductor (104) and having a lower thermal conductivity than the heat conductor (104).
F24H 1/14 - Chauffe-eau instantanés, c.-à-d. dans lesquels il n'y a production de chaleur que lorsque l'eau s'écoule, p. ex. avec contact direct de l'eau avec l'agent chauffant dans lesquels l'eau est maintenue séparée de l'agent chauffant par tubes, p. ex. en forme de serpentins
G01N 35/00 - Analyse automatique non limitée à des procédés ou à des matériaux spécifiés dans un seul des groupes Manipulation de matériaux à cet effet
52.
RADAR APPARATUS, DATA PROCESSING METHOD, AND DATA PROCESSING PROGRAM
To separate and display a plurality of target objects (S) in close proximity in an echo image while reducing capacity of a memory for displaying the echo image. A radar apparatus (101) is provided with a transmitting module (13) transmits electromagnetic waves; a receiving module (14) receives reflected electromagnetic waves; a generation module (15) generates amplitude data of the reflected electromagnetic waves and displacement data indicating velocity or acceleration of the target object (S); and a determination module determines whether a cell of interest (Ct) corresponds to a boundary cell (Cx) to divide the target object (S) based on a comparison result between the displacement data of the cell of interest (Ct) and the displacement data of the cell of interest (Ct) being close to the cell of interest (Ct) in an azimuthal direction or a distance direction. (FIG. 3)
G01S 13/34 - Systèmes pour mesurer la distance uniquement utilisant la transmission d'ondes continues, soit modulées en amplitude, en fréquence ou en phase, soit non modulées utilisant la transmission d'ondes continues modulées en fréquence, tout en faisant un hétérodynage du signal reçu, ou d’un signal dérivé, avec un signal généré localement, associé au signal transmis simultanément
G01S 7/02 - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe
A RADAR apparatus and a method for generating echo images and enhancing the visibility of echo images on a display unit are disclosed. The RADAR apparatus has an antenna configured to receive echo information of a plurality of electromagnetic waves at a vessel, from a plurality of objects. The plurality of objects includes land objects, Automatic Identification Systems (AISs), and floating objects. A smart RADAR is configured to generate a display output based on the echo information, electronic chart information extracted from a storage module, and AIS information received from the AIS. The smart RADAR applies a mask to the plurality of objects in the display output, based on mask information received from a user, to identify at least one unknown object from the plurality of objects. The smart RADAR automatically applies dilation of the mask in the display output, based on a display parameter set by the user.
A radar apparatus (418) for calculating a position of a transponder (408) is disclosed. The distress signal received from the transponder (408) in response to the electromagnetic waves transmitted by the radar apparatus (418), is displayed as twelve bright on the radar screen (504). A transponder distance detection module (602) calculates an actual distance of the transponder (408) and obtains a distance, an azimuth, and a signal level of each bright points, upon detecting the distress signal from the transponder (408). A transponder azimuth detection module (604) calculates an azimuth of the transponder (408) based on a distance, an azimuth, and a signal level of each bright points. A transponder position calculation module (606) is configured to calculate a latitude and longitude of the transponder (408) based at least on the latitude and longitude of the vessel (402), the actual distance, and the azimuth of the transponder (408).
A positioning device can include a receiver, a positioning processor, an individual accuracy index calculator, and an integrated accuracy index calculator. The receiver can receive positioning signals from a plurality of positioning satellites SAT. The positioning processor can perform positioning calculation using the received positioning signals. The individual accuracy index calculator can calculate a plurality of different individual accuracy indexes based on an error covariance matrix used for the positioning calculation, a carrier phase by the positioning signal, and a positioning result by the positioning calculation, respectively. The integrated accuracy index calculator can calculate an integrated accuracy index using the plurality of individual accuracy indexes.
G01S 19/39 - Détermination d'une solution de navigation au moyen des signaux émis par un système de positionnement satellitaire à radiophares le système de positionnement satellitaire à radiophares transmettant des messages horodatés, p. ex. GPS [Système de positionnement global], GLONASS [Système mondial de satellites de navigation] ou GALILEO
A line connector (101) is provided with a coaxial connector (1) having a core wire (10), a coaxial connector body (11) covering the outer periphery of the core wire (10), and a substrate (2) having a first main surface (2a) and a second main surface (2b) provided on the opposite side of the first main surface (2a) of the substrate (2). The substrate (2) includes a microstrip line (22) including a region on the first main surface (2a) of the substrate (2), a protrusion (10a) of the core wire protruding from the first main surface (2a) of the substrate (2), and a conductive pattern (23) provided on the first main surface (2a) and connecting the microstrip line (22). The coaxial connector body (11) is arranged opposite to the second main surface (2b) of the substrate (2). The core wire (10) protrudes from the first main surface (2a) of the substrate (2) by penetrating the substrate (2).
The disclosure discloses a target tracking apparatus for tracking target on the water of the invention is provided using. An echo data acquiring interface is configured to acquire echo data indicating a correspondence relationship between a position in the detection area and the level of the reflected wave at which the electromagnetic wave transmitted through the antenna is reflected at the position. A target extracting unit is configured to extract a potential target based on the echo data. A fluctuation value calculator is configured to calculate a fluctuation value indicating the fluctuation of the potential target based on the acquired echo data of the potential target at each timing acquired the echo data. The tracking processor is configured to determine a target to be tracked based on the fluctuation value and track the target.
G01S 13/66 - Systèmes radar de poursuiteSystèmes analogues
G01S 7/41 - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe utilisant l'analyse du signal d'écho pour la caractérisation de la cibleSignature de cibleSurface équivalente de cible
58.
TARGET TRACKING APPARATUS AND TARGET TRACKING METHOD
The disclosure discloses a target tracking apparatus for tracking a target on the water, and is provided with an echo data acquiring interface which acquires echo data indicating a correspondence relationship between a position in the detection target area and a level of reflected waves reflected by electromagnetic waves transmitted through an antenna at the position. A tracking processor configured to track a target based on the echo data. A tracking restriction area setting unit configured to set a tracking restriction area that specifies a region where the level of the reflected wave is equal to or greater than a threshold level based on the echo data. Thereafter, the tracking processor tracks the target based on the echo data in the area outside the tracking restriction area.
G01S 13/72 - Systèmes radar de poursuiteSystèmes analogues pour la poursuite en deux dimensions, p. ex. combinaison de la poursuite en angle et de celle en distance, radar de poursuite pendant l'exploration
G01S 13/50 - Systèmes de mesure basés sur le mouvement relatif à la cible
59.
SHIP INFORMATION SHARING DEVICE, SHIP INFORMATION SHARING METHOD AND SHIP INFORMATION SHARING SYSTEM
A ship information sharing device capable of sharing navigational data of an amount suitable for a channel capacity is provided. The ship information sharing device includes processing circuitry. The processing circuitry serially acquires navigational data according to navigation of a ship, which is detected by a detection apparatus mounted on the ship. The processing circuitry acquires a channel capacity of a channel to a ship information gathering device. The processing circuitry changes, according to the channel capacity, a frequency to include the navigational data into a transmission data set serially transmitted to the ship information gathering device. The processing circuitry transmits the transmission data set to the ship information gathering device.
A radar apparatus for detecting a target of the present invention, comprising: a transmission module configured to: transmit a first pulsed electromagnetic wave from an antenna; and transmit a second pulsed electromagnetic wave from the antenna after transmitting the first pulsed electromagnetic wave; a receiver configured to receive the first reflected wave reflected at a target and output a first reception signal based on the first reflected wave, and receive the second reflected wave reflected at the target and output a second reception signal based on the second reflected wave; and processing circuitry configured to: delay the first reception signal by a predetermined time, add the second reception signal to the delayed first reception signal, and perform the detection processing based on the added reception signal. (FIG. 1)
To provide an underwater detection device (100) capable of operating an ultrasonic transducer (21) with a target transmission power even when the transmission power of the ultrasonic transducer (21) is set small, and to provide a method and a program for controlling the underwater detection device (100). The underwater detection device (100) is provided with: a control circuit (101) configured to generate a control pulse and output the control pulse, repeatedly; a transmitting circuit (103) configured to generate a transmitting current in accordance with the control pulse and provide the transmitting current to the ultrasonic transducer (21); and a transmission current measurement circuit (108) configured to measure the transmitting current. The control circuit (103) is further configured to: acquire the actual envelope waveform depending on the envelope of the ultrasonic wave outputted from the transducer, based on the measured transmitting current, and correct the pulse width of the control pulse to suppress the difference between the actual envelope waveform and the ideal envelope waveform obtained, based on the ideal transmitting current.
To provide an underwater detection device (100) capable of operating an ultrasonic transducer (21) with a target transmission power even when the transmission power of the ultrasonic transducer (21) is set small, and to provide a method and a program for controlling the underwater detection device (100). The underwater detection device (100) is provided with: a control circuit (101) configured to set a target pulse width (W0) corresponding to a transmission power inputted to an ultrasonic transducer and output a control pulse (S01); a Field Effect Transistor (FET) driver (201) configured to output a first voltage signal (S11) corresponding to a pulse width of the control pulse (S01); a power transistor (202) configured to output a second voltage signal (S12) that operate the ultrasonic transducer by inputting the first voltage signal (S11); wherein the control circuit (101) is configured to: correct the target pulse width (W0) when the target pulse width (W0) is less than a predetermined threshold value (Th0) and output the control pulse (S01) having the corrected pulse width (W0'); and wherein the control circuit (101) is configured to: output the control pulse (S01) having the target pulse width (W0) when the target pulse width (W0) exceeds the threshold value (Th0).
A radar device (201) is provided with a transmission module (22) configured to transmit electromagnetic waves, an acquisition module (27) configured to acquire amplitude information indicating an amplitude of a reflected signal reflected from a target by the electromagnetic waves and phase information indicating a phase of the reflected signal, a compatibility degree calculation module (28) configured to calculate the compatibility degree of clutter (C2) included in echo data based on the reflected signal using a membership function (F) for each of the amplitude information and the phase information, the compatibility degree calculation module (28) configured to calculate a first compatibility degree corresponding to the amplitude information and a second compatibility degree corresponding to the phase information, and a clutter suppression module (29) configured to suppress the clutter (C2) based on the first compatibility degree and the second compatibility degree.
G01S 13/34 - Systèmes pour mesurer la distance uniquement utilisant la transmission d'ondes continues, soit modulées en amplitude, en fréquence ou en phase, soit non modulées utilisant la transmission d'ondes continues modulées en fréquence, tout en faisant un hétérodynage du signal reçu, ou d’un signal dérivé, avec un signal généré localement, associé au signal transmis simultanément
G01S 7/02 - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe
An underwater detection device (10) is provided with a data generation module (11a) which forms a plurality of reception beams (RB1) in a scanning range based on electrical signals outputted from a plurality of ultrasonic oscillators (13a) during a reception period after a transmission timing and generates data relating to echo intensities at respective positions in the scanning range and a fish school tracking module (11b) which updates the tracking area (A0) of the fish school based on data and navigation data. The fish school tracking module (11b) determines whether to use data based on fish school echoes in the tracking area (A0) for updating the tracking area (A0) based on a determination as to whether an index value indicating how large the echo intensity of the tracking area (A0) is relative to the echo intensity around the tracking area (A0) is equal to or greater than a threshold value.
[PROBLEM] Provided is a radar system capable of ascertaining the trajectory of a required target. [SOLUTION] A radar system according to the present invention includes: a radar sensor for generating echo data by receiving reflected waves of radio waves emitted around a ship; a generation unit for generating target data including the position and velocity of targets present around the ship on the basis of the echo data; an acquisition unit for acquiring ship data including the velocity of the ship; a calculation unit for calculating risk data, indicating the risk of the ship and the targets colliding, on the basis of the ship data and the target data; a selection unit for selecting a target having a collision risk greater than or equal to a predetermined risk among the targets as a target for display on the basis of the risk data; and a display unit for displaying a velocity symbol, representing the velocity of the target for display, at a position in the image corresponding to the position of the target for display.
[PROBLEM] To provide a radar system capable of ascertaining a required object movement-trend. [SOLUTION] This radar system comprises: a radar sensor that generates echo data by receiving reflected waves of electromagnetic waves emitted in the environs of a ship; a generation unit that, on the basis of the echo data, generates object data which includes the position and the speed of objects existing in the environs of the ship; a specification unit that specifies a range-to-be-displayed from within the environs of the ship; a selection unit that selects, as a display object, an object which is from among the objects and which currently is, or in the future will be, included in the range-to-be-displayed; and a display unit that displays a symbol at an in-image position which is in an image showing the range-to-be-displayed and which corresponds to the position of the display object.
[PROBLEM] To provide a radar system capable of sharing required object data and suppressing the communication data amount. [SOLUTION] This radar system comprises: a radar sensor that generates echo data by receiving reflected waves of electromagnetic waves emitted in the environs of a ship; a generation unit that, on the basis of the echo data, generates object data which includes the position and the speed of objects existing in the environs of the ship; a selection unit that selects, from among the objects, display objects and non-display objects; and an output unit that makes the priority for outputting the object data of the display objects higher than that for the object data of the non-display objects, and that outputs the object data.
The present disclosure provides apparatus 250 and method 900 for generating echo trails for a set of pulse widths. The apparatus 250 has an antenna 316 for receiving echo information 254 of source waves 252 at a vessel 202, from a targeted object 204. Processing circuitry 406 is configured to generate a plurality of processed echo information sets from the received echo information 254. The received echo information 254 corresponds to a first pulse width of the echo trail. The plurality of processed echo information sets comprising a plurality of echo trails ET(1) to ET(N) of the target object 204 is stored in storage modules 408. An echo trail of the plurality of echo trails ET(1) to ET(N) is selected by a selection module 410 based on a second pulse width set by a user. A synthesizer module 412 synthesizes a display output 334 based on the selected echo trail.
According to the present disclosure, a nautical drift managing device is provided. The nautical drift managing device includes an input circuitry to receive destination position information for a watercraft. Further, the nautical drift managing device includes a sensor circuitry to obtain external force information associated with the watercraft. Furthermore, the nautical drift managing device includes processing circuitry to determine, based on the destination position information and the external force information, a drift line associated with a drifting movement of the watercraft when an engine of the watercraft is stopped or neutral.
G05D 1/00 - Commande de la position, du cap, de l'altitude ou de l'attitude des véhicules terrestres, aquatiques, aériens ou spatiaux, p. ex. utilisant des pilotes automatiques
B63B 49/00 - Aménagements relatifs aux instruments nautiques ou d'aide à la navigation
B63B 79/10 - Surveillance des caractéristiques ou des paramètres de fonctionnement des navires en opération utilisant des capteurs, p. ex. des capteurs de pression, des jauges de contrainte ou des accéléromètres
B63B 79/40 - Surveillance des caractéristiques ou des paramètres de fonctionnement des navires en opération pour le suivi des operations des navires, p. ex. le suivi de leur vitesse, de leur itinéraire ou de leur calendrier d’entretien
G05D 1/49 - Commande de l’attitude, c.-à-d. commande du roulis, du tangage ou des embardées
G06F 3/14 - Sortie numérique vers un dispositif de visualisation
71.
AUTOMATIC TUNING DEVICE, MAGNETRON RADAR, AUTOMATIC TUNING METHOD, AND RECORDING MEDIUM
An automatic tuning device is mounted on a magnetron radar including a mixer that down-converts a reception wave. The automatic tuning device includes processing circuitry configured to: output a tuning control voltage for adjusting a frequency of a carrier signal provided to the mixer; acquire a tuning indication voltage indicating an intensity of a component of a particular frequency in an output signal of the mixer; set a reference value based on a particular range including therein a first level that is the tuning control voltage corresponding to a maximum of the tuning indication voltage in a first period; calculate an index value based on a scanning result of a first range comprising including the first level in a second period; and determine the output tuning control voltage based on a comparison result between the index value and the reference value.
The present disclosure provides a system and method of generating echo trails for a set of display ranges. An antenna (316) receives echo information (317) of source waves (252) at a vessel (202), from a targeted object (204). A processing circuitry (406) is configured to generate a plurality of processed echo information sets from the received echo information (317). The received echo information (317) corresponds to a first display range of a display unit (304). The plurality of processed echo information sets comprising a plurality of echo trails (ET(1), ET(2),... T(N)) of the target object (204) is stored in at least one storage module (602, 408). An echo trail of the plurality of echo trails (ET(1), ET(2),... T(N)) is selected by a selection module (410) based on a second display range set by a user. A synthesizer module (412) synthesizes a display output (334) based on the selected echo trail.
G01S 13/00 - Systèmes utilisant la réflexion ou la reradiation d'ondes radio, p. ex. systèmes radarSystèmes analogues utilisant la réflexion ou la reradiation d'ondes dont la nature ou la longueur d'onde sont sans importance ou non spécifiées
To detect speed and movement direction of a detection object in a simple configuration in a radar device, a frequency conversion device is disclosed. The frequency conversion device includes a digital-to-analog conversion module (20) for generating an analog signal; an up-conversion module (30) for generating an RF (radio frequency) signal by multiplying the analog signal with a first local signal; a transmission module (41) for transmitting the RF signal; a reception module (44) for receiving a reflected signal of the RF signal; a down-conversion module (50) for generating an IF (intermediate frequency) signal by multiplying the reflected signal with a second local signal; an analog-to-digital conversion module (60) for generating a digital signal by digitally converting the IF signal; and a cancellation module for generating a baseband signal having a cancelled phase rotation component based on the frequency difference between the first local signal and the second local signal.
G01S 13/34 - Systèmes pour mesurer la distance uniquement utilisant la transmission d'ondes continues, soit modulées en amplitude, en fréquence ou en phase, soit non modulées utilisant la transmission d'ondes continues modulées en fréquence, tout en faisant un hétérodynage du signal reçu, ou d’un signal dérivé, avec un signal généré localement, associé au signal transmis simultanément
G01S 7/02 - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe
A reception device (1) includes an antenna (2) and an estimation module (3). The antenna (2) receives the satellite signals from each of the plurality of satellite systems (100a, 100b, 100c) in a multi-GNSS positioning using the plurality of satellite systems. The estimation module (3) estimates a time error of the antenna (2) for each of the plurality of satellite systems (100a, 100b, 100c). The time error of the antenna (2) is estimated based on the system time of each of the plurality of satellite systems (100a, 100b, 100c). The system time of each of the plurality of satellite systems (100a, 100b, 100c) is based on the satellite signals received from each of the plurality of satellite systems (100a, 100b, 100c).
G01S 19/07 - Éléments coopérantsInteraction ou communication entre les différents éléments coopérants ou entre les éléments coopérants et les récepteurs fournissant des données pour corriger les données de positionnement mesurées, p. ex. DGPS [GPS différentiel] ou corrections ionosphériques
75.
UNDERWATER DETECTION DEVICE, UNDERWATER DETECTION METHOD, AND PROGRAM
To provide an underwater detection device (10), an underwater detection method, and a program capable of smoothly and properly estimating a fish catch. The underwater detection device (10) includes a fish quantity index calculation module (11c) for calculating a fish quantity index based on electrical signals output from a plurality of ultrasonic oscillators; an image generation module (11b) for generating a display image (110) including information on the fish quantity index; and a correction value reception processing module (11d) for receiving an input of a correction value for correcting the fish quantity index. The fish quantity index calculation module (11c) corrects a calculation formula of the fish quantity index based on the correction value.
A ship information exchange device capable of reducing a demodulation processing load is provided. The ship information exchange device includes a receiver, a generator, a detector, and a demodulator. The receiver receives a radio signal. The generator generates reception data of a plurality of channels used for transmission of ship information based on the radio signal. The detector detects a reception level of each of the channels. The demodulator demodulates the reception data. The demodulator determines the reception data to be demodulated according to the detection result of the reception levels.
SOLAR RADIATION AMOUNT ESTIMATION DEVICE, SOLAR RADIATION AMOUNT ESTIMATION SYSTEM, SOLAR RADIATION AMOUNT ESTIMATION METHOD, AND SOLAR RADIATION AMOUNT ESTIMATION PROGRAM
The device includes: an image acquisition unit (11) for acquiring an image of the sky; a sun identification unit (12) for identifying a position of the sun in the image; a region setting unit (14) for setting a target region in the image, that is a target region based on a position of the sun, estimating the solar radiation amount including scattered solar radiation by clouds existing around the sun; a calculation unit (15) for calculating a feature value based on pixels included in the target region; and an estimation unit (17) for performing an estimation process for estimating the solar radiation amount including the scattered solar radiation based on the position of the sun and the feature value.
G01W 1/12 - Enregistreurs de durée de l'insolation, p. ex. héliographes
H02S 50/00 - Surveillance ou tests de systèmes PV, p. ex. équilibrage de charge ou identification des défauts
G06F 18/21 - Conception ou mise en place de systèmes ou de techniquesExtraction de caractéristiques dans l'espace des caractéristiquesSéparation aveugle de sources
G06V 10/40 - Extraction de caractéristiques d’images ou de vidéos
A directional coupler (101) of present invention comprises a waveguide (11), a substrate (21), two first slits (12a, 12b), and two second slits (41a, 41b). The substrate (21) is having a strip line and ground layers (31, 33) opposed to each other at a side surface of the waveguide (11). The two first slits (12a, 12b) are provided in the side surface of the waveguide (11) along a propagation direction of an electromagnetic waves in the waveguide (11), and the two second slits (41a, 41b) are provided in the first ground layer (31) of the substrate (21) opposed to the two first slits (12a, 12b).
H01P 5/18 - Dispositifs à accès conjugués, c.-à-d. dispositifs présentant au moins un accès découplé d'un autre accès consistant en deux guides couplés, p. ex. coupleurs directionnels
The present disclosure is to provide a measurement chip, a measuring device, and a measuring method which can accurately estimate an analyte concentration with a simple configuration. A measurement chip may include a propagation layer, an introductory part, a drawn-out part and a reaction part. Through the propagation layer, light may propagate. The introductory part may introduce the light into the propagation layer. The drawn-out part may draw the light from the propagation layer. The reaction part may have, in a surface of the propagation layer where a reactant that reacts to a substance to be detected is formed, an area where a content of the reactant changes monotonously in a perpendicular direction perpendicular to a propagating direction of the light, over a given length in the propagating direction.
G01N 21/41 - RéfringencePropriétés liées à la phase, p. ex. longueur du chemin optique
G01N 21/27 - CouleurPropriétés spectrales, c.-à-d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en utilisant la détection photo-électrique
G01N 21/77 - Systèmes dans lesquels le matériau est soumis à une réaction chimique, le progrès ou le résultat de la réaction étant analysé en observant l'effet sur un réactif chimique
81.
NAVIGATION ASSISTANCE DEVICE, NAVIGATION ASSISTANCE METHOD, AND PROGRAM
[Problem] To provide a navigation assistance device capable of presenting to a user, in an easy to understand manner, the time until a risk. [Solution] This navigation assistance device comprises: a first acquisition unit that acquires first ship data including the position and velocity of a first ship; a second acquisition unit that acquires second ship data including the position and velocity of a second ship; a specification unit that specifies a risk region in which the risk of the first ship and the second ship approaching each other is greater than or equal to a predetermined value; a calculation unit that calculates the arrival time of the first ship to reach the risk region; and a display unit that displays the risk region and displays the arrival time in association with the risk region.
B63B 43/18 - Amélioration de la sécurité des navires, p. ex. contrôle des avaries, non prévue ailleurs par prévention des abordagesAmélioration de la sécurité des navires, p. ex. contrôle des avaries, non prévue ailleurs par réduction des dommages dus aux abordages
B63H 25/04 - Moyens amorçant la gouverne à fonctionnement automatique, p. ex. asservis au compas
A waveguide-type distributor of the present invention comprises: a first waveguide-type resonator configured to make an inputted electromagnetic wave resonate; an input waveguide portion configured to input the electromagnetic wave to the first waveguide-type resonator; a second waveguide-type resonator configured to make an electromagnetic wave resonate; an output waveguide portion configured to output each electromagnetic wave from the first waveguide-type resonator and the second waveguide-type resonator, respectively; and a waveguide-type phase shifter, arranged between the first waveguide-type resonator and the second waveguide-type resonator and electrically connected to both the first waveguide-type resonator and the second waveguide-type resonator through an iris, respectively, configured to adjust the phase of the inputted electromagnetic wave from the first waveguide-type resonator and output the adjusted electromagnetic wave to the second waveguide-type resonator.
A waveguide-type power distributor of the present invention comprises: an input waveguide for being inputted an electromagnetic wave into a waveguide, formed on the waveguide E-plane that is orthogonal to the electric field of the electromagnetic wave; a first resonator, arranged on the E-plane, for resonating the electromagnetic wave; a plurality of second resonator, arranged on the E-plane, for resonating the electromagnetic wave; an output waveguide for outputting the electromagnetic wave from each of the plurality of second resonator; a first iris for transmitting the electromagnetic wave from the input waveguide into the first resonator, formed by the opposing pair of H-planes of the waveguide between the input waveguide and the first resonator; a plurality of second iris for transmitting the electromagnetic wave from the first resonator into each of the second resonator, respectively, formed by the opposing pair of H-planes of the waveguide between the first resonator and the second resonator, respectively; and a plurality of third iris for transmitting the electromagnetic wave from the second resonator into the output waveguide, respectively, formed by the opposing pair of H-planes of the waveguide between the second resonator and the output waveguide, respectively.
G02B 6/12 - Guides de lumièreDétails de structure de dispositions comprenant des guides de lumière et d'autres éléments optiques, p. ex. des moyens de couplage du type guide d'ondes optiques du genre à circuit intégré
H01P 1/208 - Cavités en cascadeRésonateurs en cascade situés à l'intérieur d'une structure en forme de guide d'ondes creux
H01S 3/08 - Structure ou forme des résonateurs optiques ou de leurs composants
84.
NAVIGATION ASSISTANCE DEVICE, NAVIGATION ASSISTANCE METHOD, AND PROGRAM
[PROBLEM] To provide a navigation assistance device capable of achieving sea-route evaluation which is in accordance with an opposing relationship. [SOLUTION] This navigation assistance device comprises: a first acquisition unit that acquires first ship data including the position and the speed of a first ship; a second acquisition unit that acquires second ship data including the position and the speed of a second ship; an opposing relationship determination unit that determines the opposing relationship between the first ship and the second ship, on the basis of the first ship data and the second ship data; a sea-route calculation unit that calculates the planned sea-route of the first ship; and a sea-route evaluation unit that evaluates the planned sea-route in accordance with the opposing relationship.
[Problem] To provide a navigation assistance device that is capable of evaluating the degree of approach. [Solution] This navigation assistance device comprises: a first acquisition unit that acquires first ship data including the position and speed of a first ship; a second acquisition unit that acquires second ship data including the position and speed of a second ship; and an intrusion degree calculation unit that, on the basis of the first ship data, the second ship data, and a risk coefficient determined according to a heading with reference to the first ship, calculates a degree of intrusion when the second ship is predicted to intrude in a bumper region, which has the risk coefficient and for which the risk coefficient increases as the second ship approaches the first ship at each heading with reference to the first ship.
[PROBLEM] To provide a navigation assistance device that can present a candidate sea-route to a user in an easy-to-understand manner. [SOLUTION] This navigation assistance device comprises: a candidate sea-route calculation unit that calculates a plurality of candidate sea-routes for a ship; a sea-route classification unit that divides the plurality of candidate sea-routes into a plurality of groups on the basis of the similarity therebetween, and determines a representative sea-route for each of the plurality of groups; and a display unit that displays the representative sea-route of each of the plurality of groups.
[Problem] To provide a navigation assistance device with which it is possible to evaluate blockage of a ship route due to a risk area. [Solution] This navigation assistance device comprises: a first acquisition unit that acquires first ship data including the position and the speed of a first ship; a second acquisition unit that acquires second ship data including the position and the speed of a second ship; a risk section identification unit that, on the basis of the first ship data and the second ship data, identifies a risk section where there is a risk of collision between the first ship and the second ship in a predicted ship route of the second ship, when it is assumed that the first ship would navigate by turning in an arbitrarily defined direction and cross the predicted ship route of the second ship; and a blockage range identification unit that, in the case when the first ship has navigated by turning in the arbitrarily defined direction, identifies a blockage range representing an angular range within which the first ship crosses the risk section.
[Problem] To provide a navigation assistance device capable of determining avoidance with a margin. [Solution] This navigation assistance device is provided with: a first acquisition unit that acquires first ship data including the position and speed of a first ship; a second acquisition unit that acquires second ship data including the position and speed of a second ship; an avoidance index calculation unit that calculates an avoidance index representing the degree to which the first ship should avoid the second ship, on the basis the first ship data and the second ship data; and an avoidance determination unit that, when the distance or time it takes for the first ship to reach a predicted route of the second ship is greater than a predetermined value, determines whether or not the first ship should avoid the second ship, on the basis of the avoidance index.
[Problem] To provide a navigation assistance device that makes it possible to achieve a multifaceted route evaluation. [Solution] This navigation assistance device comprises: a first acquisition unit that acquires first ship data including the position and speed of a first ship; a second acquisition unit that acquires second ship data including the position and speed of a second ship; a candidate route acquisition unit that acquires a plurality of candidate routes of the first ship; a risk value calculation unit that, on the basis of the first ship data and the second ship data, calculates a plurality of types of risk values which represent, with different indicators, the risk of collision between the first ship and the second ship when the first ship navigates along each of the plurality of candidate routes; and a route selection unit that selects some of the plurality of candidate routes on the basis of the plurality of types of risk values calculated for each of the plurality of candidate routes.
The navigation support device (10) includes a candidate generation unit (23), a simulation unit (30), an evaluation unit (41), and a control parameter determination unit (42). The candidate generation unit (23) generates a set of candidate values of a plurality of parameters associated to the control of automatic berthing of a ship (80). The simulation unit (30) simulates berthing behavior of the ship (80) based on each of the set of candidate values of the plurality of parameters. The evaluation unit (41) evaluates the berthing behavior for the set of candidate values of the plurality of parameters based on the result of the simulation. The control parameter determination unit (42) determines the control parameter associated to the control of automatic berthing of the ship (80) from the set of candidate values of the plurality of parameters based on the result of the evaluation of the berthing behavior.
A target monitoring device includes: a data acquiring unit, acquiring image data including a ship observed by an imaging sensor; an image recognizing unit, detecting a region of the ship included in the image data; a distance acquiring unit, acquiring a distance to the ship from an observation position detected by a sensor that is different from the imaging sensor; a course acquiring unit, acquiring a course of the ship detected by the sensor that is different from the imaging sensor; and a ship body length estimating unit, estimating a ship body length of the ship based on a dimension of the region of the ship in a horizontal direction, the distance to the ship, and the course of the ship.
To provide an underwater detection device, a transducer failure determination method, and a program capable of quickly and stably determining a transducer failure. A fish finder (100) (underwater detection device) is provided with a transmission voltage measuring circuit (109) for measuring a transmission voltage supplied to a transducer (2), a transmission current measuring circuit (110) for measuring a transmission current supplied to the transducer (2), and a control circuit (101). The control circuit (101) calculates the impedance of the transducer (2) from the transmission voltage and the transmission current, and determines that the transducer (2) has failed based on determining that the transducer (2) is not normal in both of a first determination process for determining whether the transducer (2) is normal or not based on the impedance and a second determination process for determining whether the transducer (2) is normal or not based on an echo strength.
Provided is an information processing method in which: image data that includes time-series radar images is acquired; position data of a first false image candidate is acquired by inputting one acquired radar image into a first training model that outputs the position data of the first false image candidate when one radar image has been inputted; position data of a second false image candidate is acquired by inputting the acquired time-series radar images into a second training model that outputs the position data of the second false image candidate when the time-series radar images have been inputted; and a false image on a radar echo is detected on the basis of the position data of the acquired first false image candidate and second false image candidate.
G01S 7/41 - Détails des systèmes correspondant aux groupes , , de systèmes selon le groupe utilisant l'analyse du signal d'écho pour la caractérisation de la cibleSignature de cibleSurface équivalente de cible
G01S 13/89 - Radar ou systèmes analogues, spécialement adaptés pour des applications spécifiques pour la cartographie ou la représentation
96.
TARGET MONITORING DEVICE, TARGET MONITORING METHOD, AND RECORDING MEDIUM
A target monitoring device includes processing circuitry configured to: sequentially acquire an image including a marine view captured by a camera during a panning operation; detect a target included in the image; determine whether or not the detected target is identical to a target registered in a database in which target data of a target detected by a target detection unit different from the camera is registered; and stop the panning operation of the camera with the detected target included in an angle of view, when the detected target is not the target registered in the database.
G06V 10/70 - Dispositions pour la reconnaissance ou la compréhension d’images ou de vidéos utilisant la reconnaissance de formes ou l’apprentissage automatique
H04N 23/69 - Commande de moyens permettant de modifier l'angle du champ de vision, p. ex. des objectifs de zoom optique ou un zoom électronique
H04N 23/695 - Commande de la direction de la caméra pour modifier le champ de vision, p. ex. par un panoramique, une inclinaison ou en fonction du suivi des objets
[Problem] To propose a Bound-Free (BF) cleaning device, a BF cleaning method, a BF cleaning program, and an analysis device with which a magnetic collection efficiency can be improved. [Solution] This BF cleaning device comprises a conveying unit and a magnetic collecting unit. The conveying unit conveys, along a conveying path, a reaction vessel containing a reaction solution into which a reagent containing magnetic particles and a sample have been dispensed. The magnetic collecting unit brings a magnet, which is shaped to conform to the outer periphery of the reaction vessel, close to the reaction vessel when the reaction vessel is located at a magnetic collection position on the conveying path, to collect the magnetic particles present inside the reaction vessel, and moves the magnet away from the magnetic collection position when the reaction vessel is located other than at the magnetic collection position.
G01N 35/02 - Analyse automatique non limitée à des procédés ou à des matériaux spécifiés dans un seul des groupes Manipulation de matériaux à cet effet en utilisant une série de récipients à échantillons déplacés par un transporteur passant devant un ou plusieurs postes de traitement ou d'analyse
A target monitoring system includes: a camera, mounted in a ship; a detecting apparatus, mounted in the ship and detecting an actual position of a target present around the ship; an image recognizing unit, detecting an in-image position of the target included in an image imaged by the camera; a distance estimating unit, estimating a range of a distance from the ship to the target based on the in-image position of the target; and a target identifying unit, identifying the target detected from the image and the target detected by the detecting apparatus based on the range of the distance that is estimated and the actual position that is detected.
[Problem] To provide a navigation assistance device with which it is possible to combine assessment criteria pertaining to a risk of collision. [Solution] A navigation assistance device comprising: a first acquisition unit that acquires first ship data representing the position and speed of a first ship; a second acquisition unit that acquires second ship data representing the position and speed of a second ship; a first calculation unit that, on the basis of the first ship data and the second ship data, calculates a first collision risk value based on the time required for the second ship to approach the first ship; a second calculation unit that, on the basis of the first ship data and the second ship data, calculates a second collision risk value based on the distance between the first ship and the second ship; and an assessment unit that, on the basis of the first collision risk value and the second collision risk value, assesses whether there is a risk of collision between the first ship and the second ship.
