A sensor detects a detected value for a covered wire without metallic contact, and includes: a tubular support that has a male thread and an insertion channel in which the covered wire is inserted and supported; a tubular shell that is inserted into the support from a base end; a pillar-shaped detection electrode that is inserted in and supported by the shell; and a tubular threaded piece that screws onto the male thread, is rotatably attached onto the shell, and is moved, along the axis of the support, together with the shell and the detection electrode by a screwing operation. The detection electrode is configured so that the front surface is pressed onto the covered wire in the support when the detection electrode moves, resulting in the front surface becoming capacitively coupled to a core wire of the covered wire via an insulating covering.
G01R 15/16 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs capacitifs
G01R 19/00 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe
G01R 1/04 - BoîtiersOrganes de supportAgencements des bornes
The present invention aims to reduce the leakage current that flows when measuring a high voltage and includes: a voltage detector that detects a voltage and outputs a detection voltage; a current supplier that supplies a measurement current across a pair of input terminals via a protective resistor; and a processor that executes a voltage measurement process, which measures the voltage based on data indicating the detection voltage, and a resistance measurement process, which measures a resistance connected between the input terminals based on the voltage and the current. A first switch is connected in parallel to the protective resistor and the processor executes the voltage measurement process in a state where the first switch has been set open to measure the terminal voltage, and executes the resistance measurement process by setting the first switch shorted when the voltage is equal to or below the reference voltage value.
G01R 27/14 - Mesure d'une résistance par mesure d'un courant ou d'une tension issus d'une source de référence
G01R 15/09 - Circuits de modification automatique de la gamme de mesure
G01R 15/12 - Circuits pour appareils de test à usage multiple, p. ex. pour mesurer, au choix, tension, courant ou impédance
G01R 27/02 - Mesure de résistances, de réactances, d'impédances réelles ou complexes, ou autres caractéristiques bipolaires qui en dérivent, p. ex. constante de temps
G01R 19/165 - Indication de ce qu'un courant ou une tension est, soit supérieur ou inférieur à une valeur prédéterminée, soit à l'intérieur ou à l'extérieur d'une plage de valeurs prédéterminée
A remote operation system enables remote operation by an operation terminal of an electronic appliance, which executes a process according to control data from an external apparatus and outputs response data to the external apparatus, via the Internet. The remote operation system includes a first processor connected to the Internet and a second processor locally connected to the electronic appliance and set up for access by the first processor via the Internet. The second processor executes a first process that establishes a first path for reception of transmission data via the Internet from the first processor at any time. The first processor executes a second process that instructs the second processor via the first path to establish a second path for end-to-end communication to enable remote operation of the electronic appliance by the operation terminal via the Internet.
G01R 15/18 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs inductifs, p. ex. des transformateurs
A winding bobbin includes a bobbin main body constructed in a ring shape so as to house a ring-shaped core and a plurality of partitions that are provided at intervals in a circumferential direction of the bobbin main body and formed so as to protrude from a surface of the bobbin main body. A winding is formed by winding a conductive wire in winding regions on the surface that are partitioned by the partitions. The partitions each include a flange that is formed of a U-shaped plate that protrudes from the surface at three positions out of four positions that are an outer circumference, an inner circumference, and two sides of the bobbin main body, with one position omitted, and a protrusion that is formed so as to protrude from at least one out of two opening-side ends of the flange.
H01F 27/30 - Fixation ou serrage de bobines, d'enroulements ou de parties de ceux-ci entre euxFixation ou montage des bobines ou enroulements sur le noyau, dans l'enveloppe ou sur un autre support
H01F 27/32 - Isolation des bobines, des enroulements, ou de leurs éléments
According to the present invention, a protection resistor is interposed in a shorter time between a current supply unit and an input terminal when an open state occurs between input terminals during execution of a resistance measuring process. In a resistance measuring process 63, a processing unit: displays a resistance value R if the resistance value R, measured in a resistance measuring range in effect at the present time, is at least equal to a lower limit threshold value RL of the resistance measuring range and is at most equal to a first upper limit threshold value RH1 (step 63h); switches to a resistance measuring range one step lower if the resistance value R is lower than the lower limit threshold value RL in the resistance measuring range in effect at the present time (step 63j); switches to a resistance measuring range one step higher if the resistance value R exceeds the first upper limit threshold value RH1 and is at most equal to a second upper limit threshold value RH2 in the resistance measuring range in effect at the present time (step 63f); and if the resistance value R exceeds the second upper limit threshold value RH2 in the resistance measuring range in effect at the present time, causes a first switch 8 to transition to an open state (step 63c) and terminates the resistance measuring process 63.
G01R 27/02 - Mesure de résistances, de réactances, d'impédances réelles ou complexes, ou autres caractéristiques bipolaires qui en dérivent, p. ex. constante de temps
G01R 15/09 - Circuits de modification automatique de la gamme de mesure
A signal is outputted via a transmission path with little attenuation while eliminating high-frequency noise. A current sensor includes: a coil wound around a magnetic core through whose interior a measured electrical path is inserted, is connected to ground at one end, and outputs a current with a current value in keeping with a current value of a measured current flowing on the measured electrical path; a constant impedance filter whose input terminal is connected to another end of the coil, limits a frequency range of the current inputted from the input terminal to a desired frequency range, and outputs the detection current from an output terminal; a transmission path that is directly connected at one end to the output terminal; and a terminating resistance that is connected between another end of the transmission path and ground and converts the current flowing via the transmission path to a detection voltage.
G01R 15/18 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs inductifs, p. ex. des transformateurs
G01R 19/00 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe
G01R 15/20 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs galvano-magnétiques, p. ex. des dispositifs à effet Hall
G01R 15/14 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort
9.
Solar cell testing apparatus and solar cell testing method
A solar cell testing apparatus is provided that tests bypass diodes in a solar cell string constructed by connecting a plurality of solar cell modules, which include solar cells and the bypass diodes, in series for failures in the open position. The solar cell testing apparatus includes a unidirectional element that is connected between a positive electrode and a negative electrode of the solar cell string, and a voltage applier that applies a test voltage across the positive electrode and the negative electrode of the solar cell string to which the unidirectional element is connected. The solar cell testing apparatus also includes a current detector that detects a current flowing in the solar cell string, and a processor that executes processes that measure a current value of a shorted current of a solar cell string and tests for failures.
There is provided a ring-shaped magnetic core that forms a closed magnetic circuit that encloses a measured electrical path, a magneto-electric converter that detects magnetic flux inside the magnetic core and outputs an electrical signal with an amplitude in keeping with a quantity of the magnetic flux, a coil that is formed on the magnetic core and is supplied with a negative feedback current generated based on the electrical signal, and an internal shield member disposed at least in a vicinity of the magneto-electric converter and the coil. A first gap that increases a magnetoresistance of a closed magnetic circuit, which is a closed magnetic circuit for leakage flux that leaks from the magnetic core and includes the internal shield member, a part of the magnetic core where the coil is formed, and the magneto-electric converter, is formed in the internal shield member.
G01R 15/14 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort
G01R 15/20 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs galvano-magnétiques, p. ex. des dispositifs à effet Hall
A current sensor includes: a magnetic core that surrounds a detected object; a first sensor with a first sub-magnetic core incorporated in the magnetic core and a first winding wound around the first sub-magnetic core; a second sensor with a second sub-magnetic core incorporated in the magnetic core and a second winding wound around the second sub-magnetic core in the opposite direction to the first winding; a signal generator outputting signals to magnetize the first and second windings with inverted phases; a detector outputting a detection signal whose amplitude is proportionate to a current in the detected object based on the difference between first and second voltage signals generated in the first and second windings; and a waveform adjuster that is connected to at least one of the first and the second windings and adjusts the waveform of a voltage signal generated by the connected winding.
G01R 15/18 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs inductifs, p. ex. des transformateurs
G01R 19/00 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe
G01R 35/00 - Test ou étalonnage des appareils couverts par les autres groupes de la présente sous-classe
A voltage detecting probe includes a first shield with an insertion concave formed at a front end; a second shield that has a base end of the first shield inserted thereinto; and a detection electrode formed of a conductive cylindrical member, covered with an insulating covering, and housed inside the first shield. The first shield or detection electrode moves along an axis when an operation lever is moved. When the insulating covering on the front end contacts a measured wire inserted into the insertion concave, the detection electrode and wire become capacitively coupled. The operation lever includes a pillar portion inserted through a guide hole in the second shield and connected to the first shield or detection electrode. A third shield, which is attached to the pillar portion, moves with the operation lever, and shields the guide hole, is disposed inside and/or outside the second shield.
G01R 1/20 - Modifications des éléments électriques fondamentaux en vue de leur utilisation dans des appareils de mesures électriquesCombinaisons structurelles de ces éléments avec ces appareils
G01R 15/06 - Diviseurs de tension avec des composantes réactives, p. ex. transformateurs à capacité
G01R 15/16 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs capacitifs
An averaging unit includes: a plurality of sensor connectors to which current sensors are detachably connected; an averager that generates an averaged signal for at least two detection voltage signals outputted from the current sensors connected to the sensor connectors; and an outputter that outputs the averaged signal.
A voltage detecting probe includes: a shield barrel that is a barrel-shaped member made of an electrically conductive material and has an insertion concave for inserting a wire formed in a front end thereof by cutting away an outer circumferential wall at the front end along a direction perpendicular to an axis; and a detection electrode that is formed of a cylindrical member made of an electrically conductive material, whose front end surface and outer circumferential surface are covered with an insulating covering, and is housed inside the shield barrel and capable of moving relative to the shield barrel along the axis direction. When the detection electrode has been moved relative to the shield barrel and the front end surface is positioned at the insertion concave, the front end surface becomes capacitively coupled, via the insulating covering, with a wire inserted in the insertion concave.
G01R 19/00 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe
G01R 15/16 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs capacitifs
G01R 19/25 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe utilisant une méthode de mesure numérique
15.
Solar cell testing apparatus and solar cell testing method
A solar cell testing apparatus tests bypass diodes in a solar cell string, which is constructed of solar cell modules including solar cells and the bypass diodes, for open-position failures and includes: a unidirectional element connected between positive and negative electrodes of the solar cell string so as to permit passage of the current outputted when the solar cells generate power; a voltage applier that apples a test voltage, which exceeds a sum of forward direction voltages of the bypass diodes and sets the negative electrode potential higher than the positive electrode potential, across the positive and negative electrodes; a current detector that detects a current flowing in the solar cell string; and a processor that tests for open-position failures by comparing currents detected before and after application of the test voltage with the unidirectional element connected between the electrodes of the solar cell string.
A Hall element driving circuit includes: a signal switching unit which is disposed between a power supply, which outputs a current, and a Hall element having first and second terminals and performs switching control between a first switching state that supplies the current to the first terminals and a second switching state that supplies the current to the second terminals; a switching control unit that controls transitions between the first switching state and the second switching state; and a switching unit that is disposed between the power supply and the signal switching unit and controls switching between an on state where the current is supplied and an off state where the current is stopped. The switching control unit controls transitions between the on and off states and executes switching control over the signal switching unit only when the switching unit is in the off state.
G01R 15/20 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs galvano-magnétiques, p. ex. des dispositifs à effet Hall
G01R 35/00 - Test ou étalonnage des appareils couverts par les autres groupes de la présente sous-classe
G01R 19/25 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe utilisant une méthode de mesure numérique
The present invention ensures linearity of detection sensitivity. The present invention is provided with: an annular magnetic core CR forming a closed magnetic circuit which encompasses an electrical path to be measured; an electromagnetic transducer unit 15 for detecting a magnetic flux within the magnetic core CR and outputting an electrical signal of an amplitude corresponding to a flux quantity of this magnetic flux; a coil 16 that is formed on the magnetic core CR and to which a negative feedback current generated on the basis of the electrical signal is supplied; and an internal shield member SH2 disposed in the vicinity of at least the electromagnetic transducer unit 15 and the coil 16. The internal shield member SH2 has formed thereon a first gap G1 for increasing the magnetoresistance of a closed magnetic circuit for a leakage flux φ3 from the magnetic core CR, the closed magnetic circuit being configured to comprise the internal shield member SH2, a site of formation of the coil 16 in the magnetic core CR, and the electromagnetic transducer unit 15.
G01R 15/20 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs galvano-magnétiques, p. ex. des dispositifs à effet Hall
The objective of the invention is to output a signal via a transmission path with little attenuation, while eliminating high-frequency noise. This electric current sensor is provided with: a coil 5 which is wound around a magnetic core 2 through the interior of which an electrical path being measured 21 is inserted, one end 5a of the coil 5 being connected to a ground G side, and the other end thereof outputting an electric current I2 corresponding to the current value of a current being measured I1 flowing through the electrical path being measured 21; a constant-impedance filter 7, an input terminal 7a of which is connected to the other end 5b of the coil 5, and which restricts the frequency domain of the electric current I2, input from the input terminal 7a, to a desired frequency domain, and outputs said electric current I2 from an output terminal 7b; a transmission path 8, one end 8a of which is directly connected to the output terminal 7b of the filter 7; and a termination resistor 9 which is connected between the other end 8b of the transmission path 8 and the ground G, and which converts the electric current I2 flowing through the transmission path 8 into a detection voltage V2. The impedance of the filter 7 as seen from the input terminal 7a toward the termination resistor 9 is defined to be the same as the characteristic impedance of the transmission path 8.
G01R 15/18 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs inductifs, p. ex. des transformateurs
A voltage detecting apparatus detects a detection voltage generated in a detected object which is covered by an insulator. The voltage detecting apparatus includes: a detection electrode that is disposed so as to contact the insulator directly, or indirectly via another insulator; a vibrator that causes the insulator to vibrate; a current-to-voltage converter circuit that converts a detection current to a detection voltage signal, the detection current flowing from the detected object via the detection electrode to a reference voltage in a state where the insulator is being caused to vibrate, having an amplitude that is modulated in accordance with a potential difference between the detection voltage and the reference voltage, and being synchronized with vibration of the vibrator; and a detector circuit that detects a detection output indicating the potential difference from the detection voltage signal.
G01R 19/18 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe utilisant la conversion d'un courant continu en courant alternatif, p. ex. à l'aide de vibreurs
G01R 15/16 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs capacitifs
G01N 27/90 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant des variables magnétiques pour rechercher la présence des criques en utilisant les courants de Foucault
20.
Prober having linkage portion, method for manufacturing the prober and method of testing circuit boards using the prober
A probe unit includes a probe pin and a support unit supporting the probe pin. The support unit includes first and second arms disposed at a distance along a direction in which the probe pin probes a probed object; a holding unit holding base ends of the arms; and a linking unit attached to the probe pin and linking front ends of the arms. The support unit constructs a four-bar linkage that permits linear or approximately linear movement of the probe pin in an opposite direction to the probing direction. The first and second arms have through-holes at positions slightly closer to the front ends than the base ends and positions slightly closer to the base ends than the front ends, center parts between the through-holes function as bars in the four-bar linkage, and formation positions of the through-holes function as joints in the four-bar linkage.
A measurement apparatus includes a measuring unit that carries out a potential measuring process that measures potential at measured positions on a surface of a laminated body, in which a plurality of plate-like or film-like component parts with different physical properties have been laminated, in a state where an electrical signal has been supplied to the surface, and a processing unit that carries out a computational process, which has been decided in advance, using measurement values of the potential that have been measured by the potential measuring process to find an interfacial resistance of an interface between the component parts in the laminated body.
G01R 31/26 - Test de dispositifs individuels à semi-conducteurs
C12M 1/00 - Appareillage pour l'enzymologie ou la microbiologie
G01N 27/04 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant l'impédance en recherchant la résistance
A clamp sensor detects a detected value for a clamped object and includes: a main body with two main surfaces and two side surfaces; first and second clamp units whose front ends can open and close and form a ring-shaped body surrounding the clamped object; and an opening/closing mechanism for the clamp units. The first clamp unit is fixed to the main body at one side surface. The second clamp unit has a base end rotatably supported by a support shaft disposed toward the other side surface. The opening/closing mechanism includes: a biasing member biasing the second clamp unit to open the clamp units; and a sliding portion disposed on the other side surface and capable of sliding along the length of the main body. When slid toward the clamp units, the sliding portion presses the second clamp unit to close the front ends.
G09G 5/00 - Dispositions ou circuits de commande de l'affichage communs à l'affichage utilisant des tubes à rayons cathodiques et à l'affichage utilisant d'autres moyens de visualisation
G01R 31/02 - Essai des appareils, des lignes ou des composants électriques pour y déceler la présence de courts-circuits, de discontinuités, de fuites ou de connexions incorrectes de lignes
G01R 1/04 - BoîtiersOrganes de supportAgencements des bornes
G01R 1/22 - Appareils de test à pinces agissant comme bobinages secondaires de transformateurs de courant
23.
Voltage detecting apparatus and line voltage detecting apparatus
A voltage detecting apparatus detects a detected AC voltage generated in a detected object, and includes a detection electrode that is disposed facing the detected object, a detection unit that operates on a floating power supply generated with a voltage of a reference voltage unit as a reference and outputs a detection signal, and a standard signal outputting unit that outputs a standard signal to the reference voltage unit. The voltage detecting apparatus also includes an insulating unit that inputs the detection signal and outputs an insulated detection signal, a feedback control unit that amplifies the insulated detection signal, and a signal extracting unit that amplifies the insulated detection and outputs a signal component as an output signal.
G01R 19/00 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe
G01R 15/16 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs capacitifs
G01R 15/22 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs émetteurs de lumière, p. ex. LED, optocoupleurs
24.
PROBE UNIT, SUBSTRATE INSPECTION DEVICE, AND METHOD FOR ASSEMBLING PROBE UNIT
Through the present invention, the effective buckling length of a probe can easily be changed while keeping manufacturing cost low. The present invention is provided with a plurality of probes (11a), a support part for supporting the probes (11a), and an electrode plate provided on the support part, the support part is configured so as to be provided with support plates (41, 42) for supporting distal-end parts of the probes (11a) inserted through support holes (51, 52), and support plates (43, 44) for supporting proximal-end parts of the probes (11a) inserted through support holes (53, 54), and is configured so as to be able to move between a first orientation in which the support plates (41-44) are stacked so that open surfaces of the support holes (51-54) are aligned along the direction perpendicular to the support plates (41-44), and a second orientation in which the support plates (43, 44) are in contact with each other and the support plate (42) and support plate (43) are separated, and so that it is possible in the second orientation to change the distance (D2) between the support plate (42) and the support plate (43) while maintaining a constant distance (D1) between an inside surface of the support plate (42) and an outside surface of the support plate (44).
The purpose of the present invention is to reduce manufacturing costs. The invention comprises a plurality of probes (11) and a body portion (12) having support plates (41, 42), supporting tips (21) of the probes (11), and support plates (43, 44), supporting a base (23) of the probes (11). The support plates (41 to 44) are configured to be capable of moving from a first position, in which apertures of support holes (51 to 54) along the vertical direction overlap in mutual contact so as to be facing on a virtual line, to a second position, in which the support plates (41, 42) abut, the support plates (43, 44) abut, and the apertures of the support holes (52 to 54) are facing on a virtual line (A3) in a slanted direction when the support plates (42, 43) separate, and of maintaining that state. The probes (11), while in a state of being supported by the support plates (41 to 44) in the second position, are maintained in a state in which the tips (21) extend along a vertical direction and the portions excluding the tips (21) extend in a slanted direction.
G01R 31/02 - Essai des appareils, des lignes ou des composants électriques pour y déceler la présence de courts-circuits, de discontinuités, de fuites ou de connexions incorrectes de lignes
H05K 3/00 - Appareils ou procédés pour la fabrication de circuits imprimés
A magnetic sensor includes two sensor units with curved cores including meshing portions at front and base ends thereof and constructs a ring when the meshing portions mesh together. The meshing portions include main meshing portions that entirely overlap in a completely meshed state where the meshing portions overlap to the greatest extent. Auxiliary meshing portions that protrude inside and/or outside the ring are provided on the main meshing portions at the front and/or the base ends. In the completely meshed state, the auxiliary meshing portions do not overlap the main meshing portions or auxiliary meshing portions of the other core. In a non-completely meshed state where the main meshing portions partially do not overlap, the auxiliary meshing portions at least partially overlap the main meshing portions and/or auxiliary meshing portions of the other core.
G01R 15/18 - Adaptations fournissant une isolation en tension ou en courant, p. ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs inductifs, p. ex. des transformateurs
G01R 1/22 - Appareils de test à pinces agissant comme bobinages secondaires de transformateurs de courant
The objective is to provide a measurement device capable of being smaller and lighter, without increasing the difficulty in reading a measurement result. A measurement device (1) is provided with a measurement unit (11) for measuring electric parameters, a processing unit (16) for generating display data (D1) to be used for displaying the operation state of the measurement device (1) and the measurement result by the measurement unit (11) on a display unit (23) of a smartphone (2), and a wireless communication unit (14) for transmitting the display data (D1) to the smartphone (2) in accordance with the control by the processing unit (16).
A measuring apparatus is capable of separately measuring at least one of the purely resistive component and the reactance component of a measured circuit. The measuring apparatus applies an AC voltage to the measured circuit and detects a current flowing in the measured circuit. When doing so, a first detection signal whose amplitude changes in accordance with an amplitude of a real component of the current and a second detection signal whose amplitude changes in accordance with an amplitude of an imaginary component are generated. The at least one of a purely resistive component and a reactance component of the measured circuit is then calculated using the first detection signal and the second detection signal.
G01R 25/00 - Dispositions pour procéder aux mesures de l'angle de phase entre une tension et un courant ou entre des tensions ou des courants
G01R 27/28 - Mesure de l'atténuation, du gain, du déphasage ou des caractéristiques qui en dérivent dans des réseaux électriques quadripoles, c.-à-d. des réseaux à double entréeMesure d'une réponse transitoire
G06F 19/00 - Équipement ou méthodes de traitement de données ou de calcul numérique, spécialement adaptés à des applications spécifiques (spécialement adaptés à des fonctions spécifiques G06F 17/00;systèmes ou méthodes de traitement de données spécialement adaptés à des fins administratives, commerciales, financières, de gestion, de surveillance ou de prévision G06Q;informatique médicale G16H)
A resistance measuring apparatus includes: a voltage injector that injects an AC signal into a circuit by applying an AC voltage to an injection coil; a current measuring unit that measures an AC current produced in the circuit by the injection coil using a detection coil; a processing unit that calculates the circuit resistance from the AC signal voltage and the measured AC current; and a reference signal generator that outputs a binary reference signal that has a same period as the AC voltage and is synchronized to the clock. The voltage injector generates a stepped wave whose amplitude changes in synchronization with a clock, applies a signal based thereon as the AC voltage. The current measuring unit converts the current in the detection coil to a voltage signal, carries out synchronous detection using the reference signal, and measures the AC current based on the synchronous detection result.
G01R 15/00 - Détails des dispositions pour procéder aux mesures des types prévus dans les groupes , ou
G01R 27/02 - Mesure de résistances, de réactances, d'impédances réelles ou complexes, ou autres caractéristiques bipolaires qui en dérivent, p. ex. constante de temps
G01R 27/20 - Mesure d'une résistance de terreMesure de la résistance de contact de connexions au sol, p. ex. de plaques
09 - Appareils et instruments scientifiques et électriques
Produits et services
ELECTRICAL TESTING, CHECKING, MEASURING, SUPERVISING AND RECORDING EQUIPMENT AND INSTRUMENTS-NAMELY, CLAMP-ON POWER METERS; INTEGRATORS AND RECORDERS FOR CLAMP-ON POWER METERS; CLAMP-ON LEAK TESTERS; CLAMP-ON CURRENT TESTERS; INSULATION RESISTANCE TESTERS; [ FIELD TESTERS COMPRISING INSULATION AND EARTH RESISTANCE METERS, PHASE DETECTOR, HOT LINE DETECTOR, AC AMMETER, OHMMETER, CONTINUITY DETECTOR, AC VOLTMETER AND DC VOLTMETER; ] PHASE DETECTORS; DIRECT-ACTING RECORDERS; MULTIMETERS; DIGITAL MULTIMETERS; [ DIGITAL PRINTERS FOR DIGITAL MULTIMETERS; ] EARTH TESTERS; TEMPERATURE TESTERS; ILLUMINOMETERS; ULTI-SPEED TESTERS; AND CAPACITANCE TESTERS
09 - Appareils et instruments scientifiques et électriques
Produits et services
(1) Multimeters; electronic testers; capacitance meters; digital multimeters; maintenance testers; clamp-on power testers; illuminometers; current transducers; power testers and accessories therefor, i.e. integrators and recorders; electric discharge recorders; servo-operated recorders; direct-acting recorders; electronic contactless meter-relays; panel and switchboard instruments.
