39 results about "Gamma dose" patented technology

The invention provides an aerial radiation monitoring method. The method comprises the following steps of setting one group of heights H1, H2, ...Hm in an aerial radiation monitoring height range; selecting one group of gamma ray radiation sources and corresponding gamma nuclide energy E1, E2, ...En; using an aerial radiation data monitoring device to collect data at the different heights H1, H2,...Hm; processing the data and establishing a gamma energy spectrum two-dimensional G function, wherein two dimensions are ray energy and the height; and through the gamma energy spectrum two-dimensional G function, calibrating aerial radiation monitoring. In the technical scheme, a spectrum two-dimensional (the ray energy and the height) response analysis method is introduced and a full power spectrum solution spectrum idea is combined to calculate a gamma air absorption dose rate so that calculating precision of an existing aerial spectrum instrument system on a radiation environment gamma dose rate is improved.

The invention discloses a high-precision radioactive source search positioning system and method based on a civil small unmanned aerial vehicle. The positioning system comprises an unmanned aerial vehicle module and a ground workstation module in wireless communication connection with the unmanned aerial vehicle module, wherein the unmanned aerial vehicle module comprises one or more unmanned aerial vehicles, the unmanned aerial vehicle is provided with a gamma dose rate quick response measuring instrument, a height measurement and obstacle avoidance unit, a high-precision positioning unit, a liquid spraying unit and a remote data transmission and control unit, the gamma dose rate quick response measuring instrument, the height measurement and obstacle avoidance unit, the high-precision positioning unit and the liquid spraying unit are respectively in communication connection with the remote data transmission and control unit; and the ground work station module comprises terminal equipment, and the terminal equipment is in communication connection with the remote data transmission and control unit. The system has the advantages of being good in maneuverability, high in environmental adaptability, good in flight safety, high in source searching sensitivity and accuracy and the like, a warning area can be automatically delimited, and the radiation exposure dose of workers is reduced to the maximum extent.

The present invention discloses a gamma dose rate measurement system comprising a shielding device and an electronic device. The shielding device is arranged for masking a visible light, so that only a light source substantially being a gamma ray passes through the shielding device. The electronic device comprises a sensing module, an image analysis module and a display module. The sensing module generates a current signal after sensing the gamma ray; the image analysis module receives the current signal and generates an analysis result including a total gamma dose rate and a gamma energy spectrum; and the display module is arranged for displaying the analysis result.

The invention provides a neutron and gamma integrated electronic dose monitoring device which realizes the function of simultaneously monitoring the neutron external irradiation dose and gamma external irradiation dose of a worker in a neutron and gamma mixed complex radiation field by integrating the measurement functions of neutron dose and gamma dose measurement, is convenient to carry. Instrument carrying burden of workers is reduced, and radiation safety of the workers is ensured. According to the invention, the neutron dose value and the gamma dose value are measured and displayed in real time and are visual and easy to read, an alarm is given when the dose exceeds the limit, and the personal radiation dose of workers is ensured to be at a reasonable and as low as possible level.

The invention relates to a wide-range intelligent X-gamma dose rate instrument device based on a Bluetooth technology. The wide-range intelligent X-gamma dose rate instrument device comprises a plastic scintillant detector module, a photomultiplier module, a signal conditioning module, a power supply module, a signal acquisition and information processing module, a battery power display module, atemperature control module, a wireless Bluetooth module, a high-voltage regulation module, an underlying software module, a wired communication module, a handheld terminal module, a parainstrument setting module, and an upper layer software module. The wide-range intelligent X-gamma dose rate instrument device based on the Bluetooth technology according to the embodiment of the invention has the advantages of separation of detectors and secondary instruments without connection, good energy response, short response time, high sensitivity, good temperature stability, wide dose rate measurement range and the like. The device can feed back the radiation level in a short time precisely, monitor the operating state of the dose rate instrument in real time, check the historical radiation measurement information at any time, master the radiation changes in the target region, store the original data information in real time, and provide the original data for other related research.

The invention provides a radiation monitoring system. The system comprises a monitoring terminal and a monitoring center; a detector probe, an analog circuit module, an analog-to-digital conversion module, a digital multichannel analyzer and a microprocessor are arranged in the monitoring terminal, wherein the detector probe is electrically connected with the analog circuit module, the analog circuit module is electrically connected with the digital multichannel analyzer through the analog-to-digital conversion module, the digital multichannel analyzer is electrically connected with the microprocessor, and the monitoring terminal is in communication connection with the monitoring center. The monitoring system provides an effective means for occasions requiring unattended operation, radionuclide analysis and gamma dose rate online monitoring, can provide basic information for command departments to master field information of key areas in real time, evaluate radiation leakage situationdevelopment, qualitatively and quantitatively judge nuclear accident / event evolution stages and the like, and has wide applicability in the field of radiation monitoring.

The invention discloses a measuring system and method. The system comprises: a first measuring device (20) for measuring the gamma dose rate of a radioactive substance in the atmosphere; a second measuring device (30) for measuring the alpha and beta radioactivity of a radioactive substance in the atmosphere; an unmanned aerial vehicle (10) used for carrying the first measuring device (20) and the second measuring device (30) to carry out measurement in a measurement area; and a ground station (40) in communication connection with the unmanned aerial vehicle (10) so as to control the first measuring device (20) and the second measuring device (30) and process returned measurement data. The measuring method comprises the following steps that: the unmanned aerial vehicle (10) is controlled to fly to an area to be measured; the first measuring device (20) and the second measuring device (30) carried by the unmanned aerial vehicle (10) are controlled to start measuring operation; and the measurement data is transmitted to the ground station (40). According to the technical scheme, the measurement precision is high, the working range is large, the response speed is high, and an efficient and accurate monitoring means can be provided for emergency response of nuclear accidents.

The invention relates to an electric heating element deformation detecting control system which comprises a water circulation system control unit, a heat shielding system control unit, a radiation monitoring system control unit, a thermal measurement system monitoring unit and an interlock control unit. The water circulation system control unit is used for controlling water filling, drainage and cleaning of a water circulation system and carrying out heating and temperature control on loop water. The heat shielding system control unit is used to control the valve of a heat shielding system. The radiation monitoring system control unit is used for sampling and measuring gamma dose in the water circulation system and nuclides in a water sample, and then determining the damage condition of afuel assembly through comprehensive calculation. The thermal measurement system monitoring unit is used to monitor the flow, pressure, temperature and liquid level parameters of a thermal system in real time. The system provided by the invention continuously measures the gamma dose of the water circulation system, detects radionuclides in the nuclide analysis of the water sample and comprehensively calculates a detection value to determine whether the fuel assembly is damaged.

The invention discloses a gamma dose monitoring device based on remote wireless communication. A silicon photodiode detector based on a 4G wireless communication module and provided with a scintillator is used. The monitoring device is combined with upper computer software so that the radiation doses at multiple places can be remotely measured, and data can be processed and stored. According to the device, the small-size silicon photodiode detector with the scintillator is used, the gamma particle radiation detection efficiency is high, the time resolution and the space resolution are very good, and due to the efficient detection efficiency and the high anti-interference capability of the device, an environment-level gamma background can be detected. The device also has an energy spectrumanalysis function and can be used for element analysis. The whole set of measurement system carries out calibration experiments through standard Eu-152 and Cs-137 gamma radioactive sources, the measurement result is stable, and the conformity of measurement data is high compared with a professional handheld dose instrument. The device can be applied to nuclear environment monitoring of standard nuclear facility places and can also be applied to numerous fields of nuclear emergency and the like.

The invention, which belongs to the field of collimation equipment of a radiation detector, particularly relates to an orientated measurement shielding apparatus of a complex dose field of a nuclear power plant. The orientated measurement shielding apparatus comprises a first arc surface and a second arc surface, wherein one side of the first arc surface and one side of the second arc surface areconnected mutually to shield radioactive rays in a complex dose field of a nuclear power plant; the other sides of the first arc surface and the second arc surface are not in contact to form an alignment incident slot; and the radioactive rays can be detected by a cylindrical probe of a detector encircled by the first arc surface and the second arc surface through the alignment incident slot. In addition, the orientated measurement shielding apparatus also includes a scale window that is arranged on the first arc surface or the second arc surface and is capable of reading the probe position directly. When the shielding apparatus is installed on the probe of the portable detector, orientated measurement of specified radioactive equipment is realized while functions of the existing portabledetector of the nuclear power plant are not affected, so that a problem of orientated measurement in the complex gamma dose field is solved.

This invention relates to a sensor device consisting of long period gratings made of rare-earth doped double clad fiber, which is written by CO2 laser irradiation while the fiber is held static, for gamma dose measurement in the range of 150 Gy-2.5 kGy, extendable to 20 kGy, which measurements are real-time and can be from remote locations. The sensor device has high wavelength dip shift sensitivity of at least 2.8 nm / kGy, and its radiation-induced changes are near permanent. The gratings demonstrate negligible temperature sensitivity and the shifts recorded show negligible annealing at room temperature.

The invention discloses a navigation map construction method for three-dimensional reconstruction of visual fusion information. The method comprises the steps of obtaining environment data informationof a to-be-constructed environment, wherein the environment data information comprises a visible light video image, an infrared video image and a gamma video image; respectively carrying out image fusion on the visible light video image, the infrared video image and the gamma video image to obtain an infrared fusion image and a gamma fusion image; and acquiring two-dimensional feature informationof the infrared fusion image and the gamma fusion image, and constructing a three-dimensional navigation map of the to-be-constructed environment. Semantic segmentation and target recognition are carried out on information such as an infrared field and a gamma dose field in an image and a three-dimensional scene, semantic-level feature information is added to a map, and information support is provided for mobile equipment to quickly recognize target features in the map.

The invention relates to the technical field of nuclear radiation detection, and provides a wide-range gamma dose rate measurement ionization chamber, which comprises an ionization chamber, a collector and two high-voltage electrodes are arranged in the ionization chamber, working gas is filled between the two high-voltage electrodes and the collector, and the first high-voltage electrode and the second high-voltage electrode respectively correspond to a sensitive volume v1 and a sensitive volume v2. During low-range measurement, the two high-voltage poles provide high voltage at the same time, the device has a large sensitive volume so as to be suitable for low-range measurement, and during high-range measurement, in order to avoid electronic saturation, only one high-voltage pole is provided with high voltage, and at the moment, the sensitive volume is small, so that the device is suitable for high-range measurement. According to the ionization chamber, only one pre-amplification circuit is arranged, only one ionization chamber is needed, the reliability of equipment is improved, the structure of the equipment is simplified, and the size, the weight and the cost of the equipment are reduced.

A method for obtaining gamma dose rate distribution based on finite element-Monte Carlo-point kernel integral coupling comprises the following steps: automatically generating a subdivision surface by analyzing source intensity and spatial distribution of a source in a radiation shielding problem of a nuclear device, and dividing an unstructured grid by taking the subdivision surface as a boundary based on a three-dimensional CAD model of the nuclear device, carrying out conjugate transport calculation on the internal area of the subdivision surface by adopting a finite element method to obtain source bias and weight window parameters, providing the source bias and weight window parameters to a Monte Carlo method to carry out forward transport calculation on the internal area of the subdivision surface to obtain a neutron surface source and a photon surface source of the subdivision surface, and taking the neutron surface source and the photon surface source of the subdivision surface as source items; calculating an area outside the subdivision surface by adopting a point kernel integration method to obtain gamma dose rate distribution; the method has high complex geometric adaptability, the efficiency is higher than that of a traditional Monte Carlo method, the calculation efficiency is greatly improved under the condition that the calculation precision is guaranteed, and a reliable scheme is provided for rapid and accurate calculation of the radiation shielding problem of the nuclear device.

The invention relates to a rapid gamma dose rate measurement system based on an unmanned aerial vehicle technology, which comprises a measurement device, a measurement instrument and a data transmission system, and is characterized in that the measurement instrument is provided with a flight mechanism and an energy saving mechanism; wherein the flying mechanism comprises a connecting box, a fixedpipe, a movable disc, a movable pipe, a protective disc, four connecting assemblies, four paddles and four power devices, each connecting assembly comprises a supporting rod, a limiting block, a spring and a mounting hole, and the energy-saving mechanism comprises a photovoltaic panel, a rotating disc, a transmission assembly and four dust removal assemblies. The transmission assembly According tothe rapid gamma dose rate measurement system based on the unmanned aerial vehicle technology, the measurement speed and convenience are improved through the flight mechanism, and in addition, the energy-saving function is achieved through the energy-saving mechanism.

The invention discloses a mixed radiation field dose measurement system based on a liquid scintillator detector. The mixed radiation field dose measurement system comprises a liquid scintillator detector, a digital pulse waveform collector and a signal processing system, wherein the liquid scintillator detector is connected with the digital pulse waveform collector, and the digital pulse waveform collector is connected with the signal processing system. The neutron dose rate and the gamma dose rate in a mixed radiation field are measured at the same time, errors are reduced, full-digital collection and storage of pulse signals are achieved, data support is provided for follow-up processing, and the mixed radiation field dose measurement system has wide application prospects in the aspects of actual dose monitoring and scientific research.

The invention discloses a wireless area gamma dose rate monitor based on a TimeToCount method and a LoRa technology, which relates to the field of radiation protection counting, and comprises a microcontroller, a power supply module, a high-speed high-voltage pulse circuit, a G-M counting tube, a signal conditioning circuit, an alarm circuit and a LoRa wireless communication module; the microcontroller, the high-speed high-voltage pulse circuit and the signal conditioning circuit are electrically connected with the power supply module, the high-speed high-voltage pulse circuit is electricallyconnected with the G-M counting tube, and the G-M counting tube is electrically connected with the signal conditioning circuit. The measuring range of the G-M counting tube is expanded by using the TimeToCount method, the service life of the G-M counting tube is prolonged, meanwhile, a LoRa-based signal wireless transmission mode is provided, large-range networking monitoring is facilitated, and through combination of the Time-To-Count technology and the LoRa technology, the cost and power consumption of environment gamma dose rate monitoring are reduced, and the monitoring range of the environmental gamma dose rate is enlarged.

The invention provides a wide-range gamma dosimeter. The wide-range gamma dosimeter comprises a detection module, an acquisition and analysis module used for acquiring, analyzing and processing electric pulse signals output by the detection module, and a data collection and distribution module used for man-machine interaction and data sharing. The detection module comprises a scintillator detector and a reading circuit, the acquisition and analysis module comprises a conditioning circuit, an AD converter and an FPGA (field programmable gate array), the wide-range gamma dosimeter enables the scintillator detector to work in a monopulse mode and a current mode by using the FPGA to cooperate with the AD converter, the measurement range of the gamma dose rate is expanded, and the measurement accuracy is improved. And the gamma-ray energy spectrum can be obtained in a monopulse mode.

The invention provides a space gamma dose rate radiation field measuring method and device, and the method comprises the following steps: S1, measuring the radiation dose rate of a current position ofa radiation field through a dose rate instrument, and transmitting the measured radiation dose rate data to a computer for processing; s2, measuring the spatial coordinate position of the radiation field where the dose rate instrument is located by using a total station, and transmitting the measured spatial coordinate position information to a computer for processing; s3, enabling the computer to process the dose rate data and the spatial coordinate position information received in the steps S1 and S2 to obtain the radiation dose rate and the spatial coordinate position data information of the position of the radiation field; s4, measuring the radiation dose rate of the other position of the radiation field by the dose rate instrument, and repeating the steps S1 to S3 until the radiationdose rate and the spatial position data information of the measurement point of the whole radiation field are acquired. According to the measurement method in the scheme, the workload and the workingtime can be greatly reduced, and personnel are prevented from being irradiated by excessive dose.

The embodiment of the invention provides a radiometer performance index test data inspection method and device, electronic equipment and a storage medium, and the inspection method comprises the steps: obtaining the performance index test data of tested radiometer equipment, the performance index test data comprising a gamma dose rate and a gamma accumulated dose; calculating the test data to obtain a gamma dose rate relative inherent error, a gamma accumulated dose relative inherent error, an energy response error and an angle response error; and summarizing the index data of each test, outputting a test report based on the pre-configured test items and the qualification criterion of each item, and summarizing the error result of each measurement point to form the total error result of the measured radiometer equipment. Performance index test data are automatically acquired and recorded, index data such as errors are automatically calculated, a qualified conclusion is given, the test conclusion is calculated in real time after data acquisition is finished, and the test conclusion is given at the first time.

The invention belongs to the field of dose measurement, particularly relates to a neutron and gamma dose measurement system of a scintillation crystal, which aims to solve the problems that an existing measurement system cannot measure the neutron dose and the gamma dose at the same time, processing of measurement data is unreasonable, measurement results are difficult to effectively manage, and data communication is inconvenient to establish. The system in the scheme comprises a power supply module which is used for providing a power supply for a measurement instrument used in a measurement process, supporting wired power supply and wireless power supply at the same time, and meeting different power supply requirements, and a data collection module and a second data collection module which are used for collecting the neutron data and the gamma dose data, can carry out the collection process in a centralized manner, and are also used for carrying out classification and discrimination on the collected data. According to the measurement system, the neutron dose and the gamma dose can be measured at the same time, measurement data processing is reasonable and efficient, measurement results can be effectively managed, and data communication can be conveniently established.

The invention provides a gamma dose rate probe adopting a Kalman filter. The gamma dose rate probe comprises a nuclear radiation detector, a signal forming circuit, an MCU and an external circuit, the MCU adopts a counter to receive the primary signal, adopts a plurality of Kalman filters to carry out data processing on the received pulse signal data, and realizes burr of the primary signal by adjusting the process noise variance and observation noise variance of the Kalman filters. The device has the following advantages: (1) the stability of output data is improved, and a Kalman filter with proper parameters is automatically selected for filtering according to the fluctuation degree of the data; and outputting the response time of the data, and realizing the switching or parameter correction of the Kalman filter through the discrimination condition of the data discriminator, thereby controlling the response time of the data. And (2) according to the set parameters, the stability and response time of the data can be automatically balanced, and the optimal output level is achieved. And (3) the whole process is automatically and continuously carried out, the algorithm is realized in the MCU, and the realization logic is relatively simple.

The invention discloses a portable intelligent device and a measurement method for measuring gamma dose rate in environment. The device comprises a casing that is internally provided with a first detection module, a second detection module, a power supply module, and a positioning module. The outer wall of the casing is provided with a video module, a secondary instrument and a communication interface. The first detection module is 5cm away from the bottom of the casing, and the second detection module is 100cm away from the bottom of the casing. The secondary instrument is used for analyzing,processing, storing, and displaying measurement data, positioning data and shooting data, and transmitting the measurement data, the positioning data, the shooting data and analysis and processing results to a PC terminal. The portable intelligent device of the present invention solves the problems of inaccurate measurement results and low measurement efficiency in existing gamma dose rate measurement in environment.

The invention discloses a stationary type unattended full-automatic nuclear radiation environment monitoring system, which comprises a high-pressure ionization chamber, a radioactive aerosol sampling and measuring device, a meteorological parameter measuring device, a data processing and storage device and the like, wherein the high-pressure ionization chamber is used for measuring a gamma dose rate level in the air; the radioactive aerosol sampling and measuring device is used for performing automatic identification on types of nuclides in the air; the meteorological parameter measuring device is used for performing real-time measurement and analysis on six meteorological elements; and the data processing and storage device is used for analyzing, processing, storing and forwarding acquired radiation environment data. The stationary type unattended full-automatic nuclear radiation environment monitoring system can realize the full-automatic real-time measurement and analysis on the gamma dose rate, radioactive aerosol, meteorological elements and the like in remote areas or areas that people cannot reach frequently, and can upload the data to an upper level.

The invention discloses a device and a method for passively simulating X and gamma dose rate measurement. A method for measuring the intensity of a radiation field of a point where radio frequency measurement equipment is located and a radio frequency signal source is radiated is adopted to simulate the dose of gamma photons radiated by a gamma radioactive source to the points where an X-ray detector and a gamma-ray detector are located, X-ray and gamma-ray measurement is simulated through measurement of radio frequency power effective values, training of workers is achieved under the condition that no gamma radioactive source exists, workers operating X and gamma ray measurement equipment are familiar with the measurement equipment and adapt to the measurement site environment, and unnecessary gamma irradiation brought by the operators in order to be familiar with the equipment and the environment is reduced. In addition, the radio frequency signal intensity change can also simulate the change of other physical quantities (like temperature, pressure, flow and the like), so that equipment or facilities can be debugged or inspected under the condition of no actual change of physicalquantities.