A method of monitoring radon in an area, comprising: acquiring a series of radon measurements for the area; obtaining a characteristic value relating to ventilation in the area; and calculating a weighted average from the series of radon measurements; wherein weights for the weighted average are calculated based on the characteristic value. Using a characteristic of the ventilation in the area to calculate the weights allows some knowledge of the ventilation rate to be used in the averaging process so as to improve the quality of the averaged data as the ventilation rate itself affects the data and the noise level. With a high ventilation rate, the radon level will drop rapidly, with the removal of radon by ventilation dominating any radon source, and so an average can be more strongly weighted towards the current value (higher weights for recent data). With a low ventilation rate, the removal of radon will be slower and so the noise in the data needs to be taken into account, so more data should be highly weighted in the average. Combining the actual radon measurements with some knowledge of the ventilation rate allows the averaging function to provide better time resolution where appropriate without giving misleading results in other situations.
G01T 1/178 - Dispositions de circuits non adaptés à un type particulier de détecteur pour la mesure d'une activité spécifique en présence d'autres substances radioactives, p. ex. des substances naturelles, présentes dans l'air ou dans des liquides tels que l'eau de pluie
A radon gas sensor comprising: a diffusion chamber; a photodiode positioned inside the diffusion chamber; and a photomultiplier positioned inside the diffusion chamber; wherein a scintillating material is provided on at least a part of an inner surface of the diffusion chamber. This arrangement recognises that the two sensors provide different information. In particular, the photomultiplier detects more alpha particles, but cannot distinguish the energies of different alpha particles. On the other hand, the photodiode can distinguish different decays because the magnitude of the signal generated by the photodiode is proportional to the kinetic energy of the alpha particle striking it. In other words, the photodiode produces spectral data (an energy spectrum). The spectral data can be used to estimate the amount of Polonium that is adhering to aerosols and therefore provides an indication of the level of aerosols in the chamber. This can be used to apply a correction factor to the data to provide a better estimate of the true Radon concentration in the chamber. This can be combined with the count data of the photomultiplier for overall improved data.
A sensor, comprising: a printed circuit board; a detector mounted on the printed circuit board; an inner dome that is electrically conductive and is mounted on the printed circuit board so as to form a diffusion chamber around the detector; and an outer dome that is electrically conductive and is mounted on the printed circuit board, surrounding the inner dome. The dual dome construction allows a stronger electric field to be generated inside the inner dome, i.e. between the inner dome and the detector. The strength of the electric field is determined by the voltage of the detector, the voltage of the inner dome and the distance between them. Therefore, for a given size/shape of diffusion chamber (i.e. a given size/shape of inner dome), the relative voltages determine the electric field strength. The detector normally has a maximum voltage that can safely be applied to it without damaging the detector. In previous sensors, the dome has been held at ground potential. However, with the dual dome design, the inner dome can now be biased to a much higher potential, thereby increasing the strength of the electric field inside the inner dome, while still shielding that high voltage via the outer dome.
G01T 1/178 - Dispositions de circuits non adaptés à un type particulier de détecteur pour la mesure d'une activité spécifique en présence d'autres substances radioactives, p. ex. des substances naturelles, présentes dans l'air ou dans des liquides tels que l'eau de pluie
A sensor comprising: a printed circuit board; a photosensor mounted on a first side of the printed circuit board; and a light source mounted on a second, opposite side of the printed circuit board; wherein the light source is arranged to transmit light through at least a portion of the printed circuit board, said portion being impermeable to air. Positioning of the light source on the opposite side of the printed circuit board from the photosensor means that the bulk of the printed circuit board lies between the light source and the photosensor, obstructing direct transmission of light from the light source to the photosensor. However, light can be transmitted through the printed circuit board itself without drilling a hole through the printed circuit board. In this way, the light source can be mounted on the opposite side of the printed circuit board from the photosensor while still transmitting light that can reach the photosensor and also not providing an air path across the printed circuit board.
H05K 1/18 - Circuits imprimés associés structurellement à des composants électriques non imprimés
G01T 1/178 - Dispositions de circuits non adaptés à un type particulier de détecteur pour la mesure d'une activité spécifique en présence d'autres substances radioactives, p. ex. des substances naturelles, présentes dans l'air ou dans des liquides tels que l'eau de pluie
H01L 25/16 - Ensembles consistant en une pluralité de dispositifs à semi-conducteurs ou d'autres dispositifs à l'état solide les dispositifs étant de types couverts par plusieurs des sous-classes , , , , ou , p. ex. circuit hybrides
A gas sensor instrument comprises a housing formed of two parts (102, 10) and a diffusion chamber inside the housing. The diffusion chamber is formed from two parts (106, 108) and at least one of the diffusion chamber parts is formed integrally with one of the housing parts. This allows a reduction in size of the instrument without compromising the size of the diffusion chamber. Additionally, a tubular projection is formed integrally with one of the housing parts to form part of a Faraday cage for shielding an amplifier circuit of the instrument.
G01N 33/00 - Recherche ou analyse des matériaux par des méthodes spécifiques non couvertes par les groupes
G01T 1/178 - Dispositions de circuits non adaptés à un type particulier de détecteur pour la mesure d'une activité spécifique en présence d'autres substances radioactives, p. ex. des substances naturelles, présentes dans l'air ou dans des liquides tels que l'eau de pluie
G01T 7/00 - Détails des instruments de mesure des radiations
A method of measuring a radon concentration or a radon exposure level comprising: placing a plurality of individual radon measurement instruments at locations, each instrument being capable of data output; receiving radon measurement data from each of said plurality of instruments; combining said data from said plurality of instruments into a single data set; and calculating a radon concentration or radon exposure value from said single data set. Using a plurality of individual detectors and combining their data provides a much better overall analysis of radon concentration or radon exposure level. The calculated value may include producing an average of the radon concentrations across the multiple instruments. The average may be weighted with weights determined according to e.g. different locations such as proximity to ventilation devices or based on the time that an average user spends in each location. The system may calculate weights according to estimates of instrument reliability based on statistical analysis across the multiple instruments. The calculated value may also be a set of values such as time slots or time windows throughout a longer time period and may include averaging or other statistical or analytical functions of the data. Multiple instruments can monitor multiple locations and the data can be combined with scheduling or time/location data to calculate an individual's typical exposure level.
09 - Appareils et instruments scientifiques et électriques
35 - Publicité; Affaires commerciales
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
(1) Scientific, geodetic and optical apparatus and instruments, namely, radiation detectors and component parts therefor; electronic sensors for environmental monitoring of radon, humidity, temperature, mould, bacteria and air quality in residential and commercial buildings; computer software for displaying, transmitting, recording and analyzing data from the aforesaid wares; data processing equipment, namely computers, laptop computers, notebook computers and smart phones. (1) Retail services, electronic shopping retail services and mail order retail services, namely retail sale of data processing equipment, namely computers, laptop computers, notebook computers, tablet computers, smart phones, and retail sale of computer software, application software and firmware; retail services, electronic shopping retail services and mail order retail services, namely retail sale of scientific, surveying, optical, measuring and signalling apparatus and instruments, namely radon detectors, dosimeters, electronic sensors for monitoring, measuring, recording and analyzing radon, humidity, temperature, mould, bacteria and air quality, video display terminals, digital cameras, video cameras, electric and electronic video surveillance installations, digital input and output scanners, optical amplifiers and optical sensors, and component parts therefor; data processing; collection of data in the field of environmental monitoring of radon, humidity, temperature, mould, bacteria and air quality; compilation, systemization, management of computerized databases; information, advice and consultancy in relation to all the aforesaid services; scientific, technological and industrial research services related to all of the aforementioned services; technical data analysis services in the field of environmental monitoring of radon, humidity, temperature, mould, bacteria and air quality; computerized analysis of data in the field of environmental monitoring of radon, humidity, temperature, mould, bacteria and air quality; scientific testing services in the field of environmental monitoring of radon, humidity, temperature, mould, bacteria and air quality; scientific advisory services in the field of environmental monitoring of radon, humidity, temperature, mould, bacteria and air quality; provision of scientific information in the field of environmental monitoring of radon, humidity, temperature, mould, bacteria and air quality; maintenance of databases for others; electronic storing of data, namely data warehousing; computer systems monitoring services; measurement services in the field of environmental monitoring of radon, humidity, temperature, mould, bacteria and air quality; measurement evaluation services in the field of environmental monitoring of radon, humidity, temperature, mould, bacteria and air quality; preparation of technical and scientific reports in the field of environmental monitoring of radon, humidity, temperature, mould, bacteria and air quality; expert reporting services relating to technology in the field of environmental monitoring of radon, humidity, temperature, mould, bacteria and air quality; design and development of computer hardware and software in the field of environmental monitoring of radon, humidity, temperature, mould, bacteria and air quality; design and development of scientific apparatus and instruments, namely radon detectors, dosimeters, electronic sensors for monitoring, measuring, recording and analyzing radon, humidity, temperature, mould, bacteria and air quality, and component parts therefor; rental of data processing equipment, namely computers, laptop computers, notebook computers, tablet computers, smart phones, and rental of computer software, application software and firmware; rental of scientific apparatus and instruments, namely radon detectors, dosimeters, electronic sensors for monitoring, measuring, recording and analyzing radon, humidity, temperature, mould, bacteria and air quality, and component parts therefor; information, advice and consultancy in relation to all the aforesaid services.
A gas sensor instrument comprises a housing formed of two parts (102, 10) and a diffusion chamber inside the housing. The diffusion chamber is formed from two parts (106, 108) and at least one of the diffusion chamber parts is formed integrally with one of the housing parts. This allows a reduction in size of the instrument without compromising the size of the diffusion chamber. Additionally, a tubular projection is formed integrally with one of the housing parts to form part of a Faraday cage for shielding an amplifier circuit of the instrument.
G01T 1/178 - Dispositions de circuits non adaptés à un type particulier de détecteur pour la mesure d'une activité spécifique en présence d'autres substances radioactives, p. ex. des substances naturelles, présentes dans l'air ou dans des liquides tels que l'eau de pluie
G01N 33/00 - Recherche ou analyse des matériaux par des méthodes spécifiques non couvertes par les groupes
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
(1) Scientific, geodetic and optical apparatus and instruments, namely, radiation detectors and component parts therefor; electronic sensors for measuring environmental parameters including air quality; measuring and control devices for air conditioning and ventilation technology; data processing equipment, namely computers, laptop computers, notebook computers and smart phones. (1) Design and development of computers and computer programs; design and development of air conditioning and ventilation apparatus and installations; scientific, technological and industrial research services related to all of the aforementioned wares.
