104 results about "Radiation measurement" patented technology

The invention relates to a method for determining the layer thickness of an at least partially transparent surface coating on the surface of a substrate, using a measuring device for emitting focused radiation. The invention is characterized in that the distance between the surface of the substrate and the measuring device for emitting focused radiation is changed by a relative movement between the measuring device and the substrate, wherein the image of the radiation is captured in different relative positions, wherein in the case of an image with a clear outline edge, focusing is inferred at the interface between the surface coating and the substrate and the current relative position is stored as the first position, and wherein in the case of an image surrounded by scattering effects, focusing is inferred at the interface between the surface coating and the air and the current relative position is stored as the second position, after which the difference between the first and second positions is used to determine theTaking into account the refractive index of the transparent surface coating, the layer thickness of the at least partially transparent surface coating is determined.

The invention discloses a light source system capable of continuously adjusting an attenuation ratio, and belongs to the technical field of optical radiation measurement and photoelectric detection. In order to solve the problems of wavelength dependence, discontinuous adjustment, spectrum distortion and the like existing in an existing light intensity adjusting scheme, a combined structure of an integrating sphere and a diaphragm cylinder is adopted, and the device comprises a light source, the integrating sphere with the high-reflection inner wall, a front-end adjustable diaphragm, the diaphragm cylinder with the extinction inner wall and a rear-end adjustable diaphragm. Continuous attenuation of output light intensity in a predetermined dynamic range is realized by adjusting the apertures of the front and rear diaphragms, the lower limit of attenuation ratio meets the requirement, and the dynamic range can reach more than three orders of magnitude. The system uses the integrating sphere to form a stable Lambert light source, the attenuation process depends on geometric parameters, spectral distribution and spatial uniformity basically remain unchanged, and the non-uniformity of a light-emitting surface is not greater than 5%. The invention further provides a calibration method, high-precision attenuation prediction is achieved through detector measurement and view factor model fitting, and the calibration method is suitable for weak cursor calibration, detector linearity testing and other applications.

1. The name of the design product: radiation measuring device. 2. The use of the design product: the design product is used for monitoring the radiation dose field of the environment radiation and analyzing the radionuclide deposition characteristics. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: design 1 perspective view. 5. Design 1 is designated as the basic design.

According to one aspect of the present invention, a radiation measurement system is provided, comprising: an irradiation unit, a target setting unit, a detection unit, and a candidate setting unit. The irradiation unit is configured to irradiate a target with radiation. The target setting unit is configured to place the target within the irradiation range of the radiation. The detection unit is configured to detect radiation after passing through the target. The candidate setting unit is configured to set a candidate of the target and includes a shaft, a first support, and a second support. The shaft extends axially and is configured to rotate about a rotation axis along the axial direction. The first support is configured to rotate with the shaft and includes a plurality of first support regions, each supporting a candidate of the target and arranged along the outer periphery of the first support. The second support is configured to rotate with the shaft and includes a plurality of second support regions, each supporting a candidate of the target and arranged along the outer periphery of the shaft. The first support and the second support are arranged at positions spaced apart from each other in the axial direction.

This invention relates to the field of image sensing data processing and discloses a method for diagnosing the thermal environment of blue-green spaces in cold-region cities based on multispectral remote sensing. The method includes the following steps: acquiring multispectral remote sensing images, three-dimensional building elevations, and solar apparent shape parameters; calculating the illumination shading coefficient of blue-green space pixels to form a three-dimensional dynamic shadow mask; constructing a microscopic phase transition evolution operator using the sensitivity gradient of radiation intensity in different polarization directions and mid-infrared reflectivity; inputting the mask and operator into the thermal infrared radiation measurement equation to reconstruct the dynamic surface temperature; solving the surface energy balance equation based on the dynamic surface temperature, separating the latent heat storage of phase transition energy, and constructing a latent heat buffer index; and performing a comprehensive diagnosis of the thermal environment health based on this index. This invention effectively overcomes the temperature measurement errors caused by complex shading and phase state interweaving, accurately isolates the latent heat energy of phase transition, and achieves precise positioning and objective quantitative diagnosis of microclimate anomalies in cold-region cities.

The application provides a multi-sphere spectrometer comprehensive stability test platform and relates to the technical field of radiation measurement equipment test and calibration auxiliary devices. The supporting assembly comprises a plurality of cantilever arms which are distributed in the circumferential direction of the supporting rod, one end of the cantilever arm is close to the supporting rod, the other end of the cantilever arm extends away from the supporting rod, one end of the cantilever arm away from the supporting rod is provided with a sphere assembly, and the supporting assembly is further provided with a pulling structure which is arranged between the corresponding cantilever arm and the supporting rod. The multi-layer and multidirectional arrangement of the supporting assembly and the cantilever arm can realize the synchronous installation of a plurality of sphere assemblies with different specifications. The pulling structure and the cantilever arm cooperatively form a triangular supporting structure, so that the bearing capacity and the anti-overturning performance can be effectively improved. The layered arrangement and the gravity center control of the sphere assembly are beneficial to realizing the comprehensive stability test of the multi-sphere spectrometer and improving the test efficiency and the test consistency.

The invention discloses an infrared radiation calibration method and device considering a test distance, equipment and a storage medium. The method comprises the following steps: constructing an infrared radiation physical model considering the integral time of an infrared detector and the test distance of a target; and utilizing the training set and the coefficient learning network model to fit parameters in the infrared radiation physical model to obtain an optimal solution of the parameters, and applying the optimal solution to the infrared radiation physical model to complete infrared radiation calibration. According to the method, the influence of the test distance and the integral time on the relationship between the gray scale image and the radiation brightness is considered, so that the infrared radiation physical model is constructed, the accuracy of the radiation calibration result is improved, and the accuracy of the radiation calibration result is improved by utilizing the gray scale image under different test distance and integral time combinations. And parameters of the infrared radiation physical model are optimized by a training set consisting of the grey-scale maps and the black-body radiance corresponding to each grey-scale map, so that the infrared radiation physical model can set an optimal solution, and the measurement precision of the infrared radiation measurement system on the target radiance distribution is improved.

A radiation detector that suppress a double count which occurs by detecting a single pulse duplicately with a plurality of counters in counter switching, and can acquire highly accurate data, is configured to detect radiation in continuous exposure, comprises a sensor for generating a pulse when a particle of radiation is detected, a plurality of counters provided for counting the pulses, a setting holding circuit for holding a setting of an off-time for turning off any of the plurality of counters, and a control circuit for switching the counter performing counting the pulses after a lapse of the off-time with respect to a trigger signal.

The invention relates to the technical field of radiation measurement, in particular to a high-radioactivity volatile liquid on-line measuring device and method.The measuring device comprises an overflow pool, a lead shielding body and a detector, a detection channel is formed in the axis area of the lead shielding body in the vertical direction in a penetrating mode, and an orifice in the bottom of the detection channel is sealed through a window plate; a detector is coaxially arranged in the detection channel, and a light-sensitive surface of the detector directly faces the window plate; the lower end of the lead shielding body is embedded and fixed at the top opening of the overflow pool, so that the top of the overflow pool and the bottom of the lead shielding body define an annular airflow channel. The detector is arranged in the detection channel in the lead shielding body, and the dynamic air curtain isolation layer is constructed between the bottom of the lead shielding body and the liquid level of the overflow pool, so that the upward diffusion of volatile radioactive substances is physically blocked while gamma ray penetration measurement is realized, the detector and a light-sensitive surface are fundamentally prevented from being polluted, the maintenance frequency is remarkably reduced, and the measurement accuracy is improved. And the long-term measurement precision and the online continuous operation capability of the system are ensured.

The application discloses a kind of floating offshore solar radiation measurement data correction method and system, it includes the following steps: obtaining the pitch angle and roll angle of floating offshore solar radiation measurement system;Obtain the unit normal vector of the measuring plane pointing to the sky in the horizontal plane rectangular coordinate system;Calculate the angle between the measuring plane and the horizontal plane;Get horizontal plane solar zenith angle and azimuth angle;Construct the unit vector along the direction of sunlight incidence pointing to the sun;Correct the zenith angle;Calculate the horizontal plane scattered irradiance value;The horizontal plane total irradiance saved by floating offshore solar radiation measurement system is corrected, and the corrected horizontal plane total irradiance is obtained.The measurement data of the floating offshore solar radiation measurement system is corrected by the application, the measurement error caused by the inclination of the measurement platform caused by wind and wave is reduced, and more accurate measurement data is provided for the evaluation of offshore light resources and the planning of offshore photovoltaic power station.

The invention provides a method for measuring and recording solar radiation in a crop cultivation area based on solar photovoltaic, and relates to the technical field of crop cultivation environment monitoring and solar energy application, and the method comprises the steps: collecting light energy through a solar photovoltaic module to supply power to a system, and combining an efficient radiation sensor angle adjustment and temperature compensation technology; it is ensured that equipment continuously and stably works in different environments, and remote data monitoring is supported. According to the solar photovoltaic crop cultivation area solar radiation measuring and recording method, the problems of angle error and temperature influence in radiation measurement are solved through accurate radiation sensor angle adjustment and temperature compensation technologies. The angle adjustment mode driven by the stepping motor ensures that the sensor accurately aligns to incident light under different conditions, and the measurement deviation during low-angle illumination is reduced. The temperature compensation technology utilizes ambient temperature correction, improves the accuracy of radiation data, and ensures long-term stable optical radiation data recording in a remote crop cultivation area.

The invention relates to the field of fire simulation, and discloses a high-rise or super high-rise building facade three-dimensional fire simulation system under the action of environmental wind and a control method. The building main body comprises a plurality of cavities, the inner side of each cavity is provided with an indoor heat preservation layer and a fire source simulation device, the front face of each cavity is provided with a window, the side faces of each row of cavities are provided with observation windows, and the front face of the building main body is further provided with an outer vertical face; movable side walls are arranged on the two sides of each cavity; the front face of each cavity is provided with a telescopic cornice and an outer wall heat preservation layer. A multi-fan active control wind tunnel device; and the data acquisition system comprises a temperature measurement unit, a heat flow measurement unit, a radiation measurement unit and a camera shooting unit. According to the invention, a fire occurrence scene of an actual high-rise or super high-rise building facade can be comprehensively simulated, and building fire spreading experiment research under various scenes of vertical three-dimensional fire of the high-rise building facade from inside to outside and from outside to inside is facilitated.

A method for determining a convolution kernel for an iterative statistical algorithm based on a continuous-to-continuous data model. The method is used for image reconstruction from radiation measurements obtained in emission tomography, specifically in a Time-of-Flight Positron Emission Tomography (TOF PET) scanner. The presented method is a non-list-mode solution that reduces the computational complexity of the reconstruction problem, improves the resolution of reconstructed images, reduces the radiation dose absorbed by patients during TOF PET examinations, and / or shortens the measurement acquisition time without significantly compromising the quality of the diagnostic images. Notably, the quality of the functional images remains at the same level. These improvements are achieved by designing the convolution kernel to account for the statistical properties of the measurement signals registered during the TOF PET scanner's acquisition process.

The invention discloses a peak-valley segmentation multi-size self-adaptive peak searching method applied to collision light pulse radiation, relates to the field of light radiation measurement, and aims at the characteristics of peak structure size difference, asymmetric structure distribution and the like of collision light radiation signal data, based on a peak-valley segmentation region and in combination with a logarithmic normal distribution fitting algorithm. According to the method, adaptive extraction of characteristic quantities of peaks of different sizes is realized, and main existing areas of peak structures of different scales are adaptively traversed through screening of peaks and valleys, so that the calculation amount of signal data processing and peak influence area screening is reduced, the peak searching process efficiency of the peak structures of different sizes is improved, and the calculation cost and time are saved.

The invention provides a multi-detector radioactive source positioning method and system based on a particle filter algorithm, and the method comprises the following steps: defining a to-be-monitored physical space as a search region, and building a radiation measurement model; randomly generating a particle set in the search area, wherein each particle comprises assumed radioactive source position coordinates and estimated activity parameters; a mobile platform carrying a plurality of radiation detectors is controlled to move in the area, the total count value of actual measurement of each detector is obtained, and the weight of each particle in the particle set is calculated by using the radiation measurement model and the actual measurement values; acquiring an environment background count value, calculating a ratio of an actual measurement value to a background value, and only when the ratio exceeds a preset signal-to-noise ratio threshold value, performing resampling on the particle set; judging whether the particle set meets a positioning ending condition or not, and if yes, determining a radioactive source positioning result by using the particle parameter with the highest weight and outputting the radioactive source positioning result; and if not, taking the weight gathering center as the next target position, and controlling the mobile platform to move towards the next target position.

The invention discloses a medium-wave thermal imager calibration method for solid engine tail flame radiation measurement. The method comprises the following steps: measuring image data of a target black body at a corresponding temperature in real time through a medium-wave thermal infrared imager additionally provided with a specific optical filter; performing time dimension alignment and static and dynamic region division on the target area array black body infrared image data to obtain target area array black body static and dynamic infrared features; performing mean value estimation on the target area array black body features to obtain black body uniform feature information at the target temperature; performing characteristic-radiance calibration and curve fitting on the measurement data corresponding to the intermediate infrared thermal imager through the Planck's law of radiation to obtain a calibration equation corresponding to the intermediate infrared thermal imager; and an attenuation piece is additionally arranged again, intermediate infrared calibration equations under different configurations are obtained, and then the infrared radiation attenuation ratio is calculated. According to the invention, high-precision calibration of the intermediate infrared thermal imager can be realized, and the radiation brightness measurement precision and reliability of the intermediate infrared thermal imager can be improved.

A radiographic imaging system includes: a radiation emitter that emits radiation; a measurer that measures a distance between the radiation emitter and a radiographic imaging device and outputs distance information; and a hardware processor. The radiographic imaging device generates an image, based on the radiation emitted by the radiation emitter. The hardware processor calculates angle information of the radiographic imaging device with respect to a direction of the radiation emitted by the radiation emitter, based on the distance information of the measurer.

This invention belongs to the field of infrared radiation measurement technology, and particularly relates to a method for measuring infrared radiation characteristics by removing stray radiation. This invention obtains calibration coefficients from a large-aperture infrared optical imaging system that has already been calibrated in a high-low temperature chamber. Patch-type temperature sensors are installed at both ends of the large-aperture infrared optical imaging system. Combined with an infrared radiation measurement principle model, stray radiation caused by temperature inhomogeneity in the large-aperture optical imaging system can be calculated and eliminated, thereby improving the accuracy of infrared radiation characteristic measurements under target range conditions.

An inspection apparatus for detecting a defect in an electrode tab of an electrode assembly, wherein the electrode tab is provided at a longitudinal end of the electrode assembly. The inspection apparatus comprises a radiation emitting means configured to emit an x-ray or a beta ray towards the electrode tab and a radiation measuring means, disposed opposite the radiation emitting means so as to have the electrode tab positioned therebetween. The radiation measuring means is configured to measure an amount of the x-ray or the beta ray transmitted through the electrode tab. The inspection apparatus further comprise a processor configured to process a signal corresponding to the measured amount of the x-ray or the beta ray and determine a defect if the amount of the x-ray or the beta ray measured at a portion within the electrode tab shows a drop by a predetermined threshold or more, compared to a reference value.

The present disclosure discloses a method for measuring and checking the irradiation of a product by a radiation source using a measuring device. After conveying the product in front of the radiation source, the radiation beam irradiates the front of the product and passes through to hit the at least two detectors, which are pointing to the same target zone of the radiation source by a collimator. Finally, the recorded signal of each detector is compared with the signals determined in the performance qualification.

The invention discloses an engine tail flame radiation measurement method and system, and the method comprises the steps: S1, igniting an engine, recording the original measurement data of the engine, and enabling the original measurement data to comprise a pressure data sequence in a combustion chamber and a time sequence infrared image of the engine; s2, original measurement data in the engine starting process are processed, and the incidence relation between the engine starting combustion chamber pressure data sequence and the infrared radiation intensity sequence is established; and S3, processing original measurement data when the engine is in a stable working state, and obtaining a tail flame space mode, a time evolution characteristic and a characteristic frequency through intrinsic orthogonal decomposition. The method has the advantages that the intrinsic orthogonal decomposition method is introduced into the field of engine tail flame radiation measurement data processing, and the space distribution characteristics of the tail flame can be clearly revealed.

The invention discloses a spectrum optimization-based double-layer medium wide spectrum parameter simultaneous reconstruction method, relates to the technical field of spectral imaging, and aims to solve the problems that when wide optical parameter reconstruction is carried out based on a multi-layer medium model in the prior art, detection radiation optical signals are limited by a traditional contact type measurement mode, and the reconstruction precision is low. On the basis of a traditional participating medium optical parameter measurement and reconstruction method, a light field camera is introduced to more accurately detect a reflected radiation measurement signal of a medium boundary; a reconstruction optimization algorithm of searching an initial point by a steepest descent method and searching an optimal solution by a conjugate gradient method is combined, so that the efficiency of accurate reconstruction of the double-layer medium is greatly improved, the limitation of a traditional contact measurement mode is broken through, and the reconstruction precision is improved; in view of the problem that a radiation measurement signal is extremely low in sensitivity to a reduced scattering coefficient of a bottom-layer medium, prior information of a spectrum dimension is introduced, reconstruction results of an absorption coefficient and a reduced scattering coefficient of a double-layer medium, especially the bottom-layer medium, are improved, and simultaneous reconstruction of a double-layer medium absorption spectrum and a reduced scattering spectrum is realized.

The utility model discloses a radiation dosimeter, which belongs to the technical field of radiation detection and comprises a shell formed by assembling an upper shell and a lower shell. A circuit board is installed in the shell, and the two sides of the circuit board, the upper shell and the lower shell are arranged at intervals to form two electric device installation cavities; a toggle clip is arranged on the outer side of the shell. According to the utility model, the circuit board and the shell form two independent electric device mounting cavities, so that electric accessories in the device are arranged more compactly, and the size of the device is reduced; meanwhile, the toggle clip is arranged on the shell, so that the device is small in size and convenient to carry, an operator can give consideration to radiation measurement and other work, the working efficiency and quality are improved, and the time of being located in a radiation area is shortened.

The invention discloses a high-precision full-elevation sky-ground radiation signal correction method and device, and belongs to the technical field of radiation signal processing, and the method comprises the steps: carrying out the preprocessing of a to-be-processed sky-ground radiation signal, and obtaining a zero-offset sky-ground radiation signal; calculating a soft decision function transformation coefficient and a mixed function weight coefficient according to the skewness value of the zero-offset sky-earth radiation signal; substituting the soft decision function transformation coefficient and the mixed function weight coefficient into a pre-constructed mixed function transformation model, and using the mixed function transformation model to perform soft saturation transformation on the zero-offset sky-earth radiation signal to obtain a rectified sky-earth radiation signal; and fitting the rectified space-ground radiation signal to obtain a rectified space-ground radiation signal fitting curve. The method does not need to depend on a simplified mathematical model, does not need external reference information, can achieve the rectification of the space-ground radiation signal in a dynamic environment, and remarkably improves the reliability and robustness of a space-ground radiation measurement system.

The invention relates to the technical field of environment characteristic measurement, in particular to an air-sea environment dual-band infrared radiation characteristic measurement method and device. The method comprises the following steps: building a portable measuring device on a shipborne platform; controlling the two-dimensional turntable to rotate according to an N-type variable-speed scanning path, synchronously controlling the medium-long wave thermal imager and the long-wave thermal imager to perform continuous image acquisition, and recording attitude information in real time by the photoelectric inertial navigation system; performing data alignment on each frame of infrared image and the corresponding accurate azimuth angle and pitch angle based on a time axis of photoelectric inertial navigation, and converting an image gray value into radiation brightness; and finally summarizing results. The device comprises a tripod, a two-dimensional turntable, an adapter plate, and a medium-wave thermal imager, a long-wave thermal imager and a photoelectric inertial navigation which are fixed on the adapter plate. Through data synchronization and alignment of the photoelectric inertial navigation and the thermal imager, the ship attitude disturbance is effectively compensated, the problem of low accuracy of infrared radiation measurement data on a dynamic platform is solved, and meanwhile, the device has the advantages of quick response and portability.

An x-ray based cement evaluation tool for measurement of the density of material volumes within single, dual and multiple-casing wellbore environments is provided, the tool including at least an internal length comprising a sonde section, wherein said sonde section further comprises an x-ray source; a radiation shield for radiation measuring detectors; sonde-dependent electronics; and a plurality of tool logic electronics and PSUs, wherein the tool uses x-rays to illuminate the formation surrounding a borehole and a plurality of detectors are used to directly measure the density of the cement annuli and any variations in density within. Detectors used to measure casing standoff such that other detector responses are compensated for tool stand-off and centralization; a plurality of reference detectors is used to monitor the output of the x-ray source, and a shortest-axial offset detector is configured to distribute incoming photons into energy classifications such that photoelectric measurements may be made.

This invention relates to the field of radiation measurement technology, specifically to a method and apparatus for testing the radiation shielding performance of a medical cyclotron. The method includes: acquiring target radiation equivalent sequences corresponding to different preset regions in the medical cyclotron to be tested; determining the radiation index configuration for each preset region; selecting regions to be shielded; selecting location points representing corner positions; determining the geometric inertia contribution and nonlinear inertia contribution for each shielded region; and determining the radiation inertia level for each shielded region based on the geometric inertia contribution, nonlinear inertia contribution, and target radiation equivalent sequence. This invention, by analyzing the measured target radiation equivalent sequence, enables the testing of the radiation shielding performance of a medical cyclotron, improving the accuracy of radiation shielding performance testing for medical cyclotrons.

The invention relates to a sensor holder (100) for a radiation measurement system (200) for measuring (140) in a longitudinally extended internal volume (U), in particular a pipe, a wall or a conduit, comprising: - a front receiving area (10) which is designed to receive a sensor (210) and is formed along a thrust direction (V), - a rear mounting area (20) which is arranged in the direction of travel (V) behind the front receiving area (10), wherein the rear mounting area (20) can be mechanically connected to a carrier (220) of a radiation measurement system (200). Furthermore, the invention relates to a corresponding radiation measurement system (200) and a method.

This invention discloses a selenite crystal and its preparation method. X-ray powder diffraction of the selenite crystal, measured using Cu-Kα radiation, yielded diffraction angles (expressed as 2θ) of 17.7°±0.2°, 19.5°±0.2°, 20.0°±0.2°, 22.9°±0.2°, 24.5°±0.2°, 24.9°±0.2°, 26.2°±0.2°, 29.8°±0.2°, 30.2°±0.2°, 31.4°±0.2°, and 33°. Characteristic peaks are observed at 0°±0.2°, 34.3°±0.2°, 35.8°±0.2°, 36.6°±0.2°, 37.4°±0.2°, 37.5°±0.2°, and 38.4°±0.2°. A characteristic endothermic peak is observed at 73.4℃ in the differential scanning calorimetry (DSC) spectrum of the crystal. This invention features a simple preparation route, mild reaction conditions, convenient operation, low cost, and good process reproducibility. The prepared selenite has a stable crystal form, making it suitable for large-scale industrial production of pharmaceutical raw materials.