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 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 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 a fast gamma dose rate measurement system based on unmanned aerial vehicle technology, including a measuring device, the measuring instrument includes a measuring instrument and a data transmission system, and the measuring instrument is provided with a flight mechanism and an energy-saving mechanism. The mechanism includes a connection box, a fixed tube, a moving plate, a moving tube, a protective plate, four connecting components, four paddles and four power devices. The connecting components include a support rod, a limit block, a spring and a mounting hole. The energy-saving mechanism includes a photovoltaic panel, a rotating disk, a transmission assembly, and four dust removal assemblies. The transmission assembly includes a rotating shaft, a connecting bearing, a screw, a ball screw bearing, and an assembly hole. The dose rate measurement system improves the measurement speed and convenience through the flight mechanism, not only that, but also realizes the energy-saving function through the energy-saving mechanism.

The invention belongs to the field of radiation detector collimation equipment, and specifically relates to a complex dose field directional measurement shielding device of a nuclear power plant, which includes a first circular arc surface and a second arc surface connected to each other on one side and capable of shielding radioactive rays in the complex dose field of the nuclear power plant. Two arc surfaces, the other side of the first arc surface and the second arc surface are not in contact with each other, forming a collimated incident slit, and the radioactive rays can be passed through the collimated incident slit by the first arc surface and the second arc surface The surrounding cylindrical probe of the detector detects, and also includes a scale window that can directly read the position of the probe, which is arranged on the first arc surface or the second arc surface. Adding the shielding device to the probe of the portable detector can realize directional measurement of specific radioactive equipment without affecting the function of the existing portable detector of the nuclear power plant, and solve the problem of directional measurement in the complex gamma dose field.

The invention relates to an electric heating element deformation detection control system, which includes 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 Control the water filling, drainage and cleaning of the water circulation system, and control the heating and temperature of the loop water; the heat shielding system control unit is used to control the valves of the heat shielding system; the radiation monitoring system control unit is used to monitor the gamma dose in the water circulation system Sampling and measurement of the nuclides in the water sample, and then determine the damage status of the fuel assembly through comprehensive calculations; the monitoring unit of the thermal measurement system is used to monitor the flow, pressure, temperature, and liquid level parameters of the thermal system in real time. The invention can continuously measure the gamma dose of the water circulation system, detect the radionuclide in the nuclide analysis of the water sample and comprehensively calculate the detected value, and judge whether the fuel assembly is damaged.

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 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.