182 results about "Black body" patented technology

The invention discloses a light field tomography system and a flame three-dimensional temperature field reconstruction method, and belongs to the technical field of flame temperature measurement. The problem that the temperature field reconstruction error of an existing light field tomography method is large is solved. The method comprises the following steps: firstly, shooting a light field image of a measured flame by using a light field tomography system, dividing a space region where the measured flame is located into micro-element bodies, and then performing flame radiation ray tracing from each pixel point on the light field image of the measured flame; establishing a radiation transfer equation set according to a tracing result of flame radiation light, obtaining a reconstruction equation set according to the established radiation transfer equation set, and solving the reconstruction equation set based on multi-point accurate temperature measurement value information of a thermocouple to obtain black body spectrum radiation intensity of each infinitesimal body of the flame; and finally, converting the black body spectrum radiation intensity of each infinitesimal body into the temperature of each infinitesimal body to realize temperature field reconstruction. The method can be applied to flame three-dimensional temperature field reconstruction.

The invention relates to the field of infrared radiation measurement, in particular to a response drift correction device and method for a large thermal inertia infrared system, and the method comprises the steps: respectively arranging a temperature sensor on each optical structure in the large thermal inertia infrared system; placing the large thermal inertia infrared system in different environment temperatures, and carrying out radiometric calibration measurement on the large thermal inertia infrared system by using a calibration black body; temperature values measured by the temperature sensor at different environment temperatures form a temperature vector; calculating a variance expansion factor of each temperature vector, and selecting the temperature vectors meeting conditions as a characteristic temperature subset representing stray radiation in the infrared system; constructing an infrared system response model based on the characteristic temperature subset, and performing multivariate linear fitting on the infrared system response model based on data measured by radiometric calibration to obtain a model coefficient; and performing response drift correction on the large thermal inertia infrared system by using the corrected infrared system response model. The large thermal inertia infrared system response drift correction method can realize large thermal inertia infrared system response drift correction under a wide temperature range.

The invention provides a temperature control system for a radiation calibration device of an ultra-large-diameter infrared camera. The temperature control system comprises a meter-scale surface source blackbody radiation source, a temperature acquisition and control system, a heating plate group, a programmable power supply group, a low-temperature electromagnetic valve group, a liquid nitrogen supply system and an embedded control system, the temperature collection and control system collects the temperature of a radiation surface in real time through a temperature sensor and transmits the temperature to the control system, the temperature is compared with the set temperature, PID control is adopted, the refrigeration power and the heating power are controlled through two paths of output respectively, and the blackbody radiation source liquid nitrogen pipeline controls the meter-scale surface source blackbody radiation source through a plurality of low-temperature linear electromagnetic valves. The black body radiation source area is refrigerated; the programmable power pack controls the heating plate group to heat the blackbody radiation source area; the embedded control system realizes input and output of data, realization of a control strategy and remote transmission and communication of the data. The system can perform high-precision control and rapid measurement on the temperature of the black body, and improves the uniformity and stability of the meter-scale surface source black body.

The utility model belongs to the technical field of infrared radiation, and provides a radiation calibration device with an adjusting function, which comprises an infrared radiometer and a surface source black body, and further comprises a detection plate respectively provided with a fixed end and a movable end; the adjusting part is arranged on the detection plate, the adjusting end is configured to be connected with the movable end, the adjusting part has a switchable locking / unlocking state, when the adjusting part is in the unlocking state, the movable end can move relative to the fixed end, and when the adjusting part is in the locking state, the movable end is fixed relative to the fixed end; wherein the surface source black body and the infrared radiometer are respectively arranged on the fixed end and the movable end. According to the utility model, the distance between the infrared radiometer device and the surface source black body can be adjusted in the calibration process.

The invention relates to the technical field of absolute radiometric calibration of satellite infrared remote sensing sensors, and provides a method for analyzing sensitivity of infrared remote sensing calibration black body emissivity to equivalent radiation, which comprises the following steps of: 1, selecting a specific satellite data file as an experimental sample; step 2, extracting key temperature data from the selected data file; 3, performing data calculation according to the data extracted in the step 2; and 4, calculating the equivalent emergent radiation of the black body by using a Planck function and the emissivity of the black body. According to the method, the equivalent emergent radiation of the satellite infrared remote sensing calibration black body is accurately calculated, so that the absolute radiation calibration precision of the satellite infrared remote sensor on the on-satellite black body is effectively improved, and the defects of large workload and low frequency of site calibration, high implementation threshold of cross calibration and the like can be effectively overcome; therefore, high-frequency and automatic radiometric calibration of the on-orbit infrared channel of the remote sensing satellite is realized.

The invention discloses a field-of-view test method, device and system based on an infrared imaging system, and the method comprises the steps: obtaining an initial response signal when a diaphragm is not arranged, setting the diaphragm, adjusting the pitch and the spacing value to obtain a plurality of groups of detection signals, and if only a test result in one detection direction needs to be obtained, determining that the test result is not in one detection direction; and if not, analyzing to obtain a space angle of each group of initial detection parameters, converting the detection signals into a two-dimensional grayscale image, carrying out image processing to obtain image pixel parameters, and carrying out linear fitting on the space angles of the multiple groups of detection signals and the image pixel parameters to obtain a field-of-view test result. According to the field-of-view testing method, the detection signals are converted into the two-dimensional gray level images, image processing is carried out, linear fitting is carried out on the space angles and image pixel parameters of the multiple sets of detection signals, and therefore the influence of nonuniformity of infrared radiation of the center area and the edge of the surface of the black body on the testing result can be effectively avoided; and the reliability of field-of-view testing of the infrared imaging system is improved.

The lighting device may be configured to perform black body curve fading. For example, the control circuit may be configured to control the drive circuit such that the light emitted by the lighting load is adjusted (e.g., faded) along a black body curve. The control circuit may be configured to determine whether to fade from an initial color to a destination color in a Correlated Color Temperature (CCT) chromaticity space or an XY chromaticity space. The control circuit may be configured to determine whether the initial color and / or the destination color are on the black body curve. When the initial color and the destination color are determined to be on the black body curve, the control circuit may be configured to control the drive circuit such that the light emitted by the lighting device is adjusted from the initial color to the destination color along the black body curve.

The invention discloses an efficient calibration method for a wide-dynamic-range infrared radiation measurement system, and belongs to the field of infrared radiation measurement, and the method comprises the steps: 1, building an infrared radiation measurement system response model considering the influence of an attenuation slice and integral time according to the energy transmission process of the variable attenuation slice and integral time infrared radiation measurement system; step 2, executing a black body image acquisition strategy; and 3, according to the infrared radiation measurement system response model considering the influence of the attenuation slice and the integral time in the step 1, establishing an objective function by using a weighted least square method, and minimizing the objective function by using an optimization algorithm to solve a calibration coefficient in the infrared radiation measurement system response model. According to the technical scheme, the wide-dynamic-range infrared radiation measurement system can efficiently complete the radiation calibration task in a time-saving mode, and compared with a conventional calibration method, the calibration speed can be increased by several times on the premise that the calibration precision is not reduced.

The invention relates to a heterogeneity correction method based on derivative domain response rate correction. The heterogeneity correction method comprises the following steps: setting black bodies with different temperatures; obtaining an image of each black body through an infrared imaging device, and collecting the response of an infrared detector to the current black body temperature when the image of each black body is obtained; based on the response to the current blackbody temperature, fitting to obtain a response curve function of each pixel to different blackbody temperatures, and correspondingly obtaining the response rate of each pixel at any temperature; correcting the response rate of each pixel; and performing non-uniformity correction on the infrared image, and outputting the corrected infrared image. According to the method, the response rate of each pixel can be accurately described in a derivative domain based on the theoretical basis that the response of the pixel to different radiation quantities is a nonlinear relationship, and the response rate of each pixel is further subjected to non-uniformity correction, so that a more accurate nonlinear response curve and a corrected infrared image are obtained, and the accuracy of the infrared image is improved. Therefore, the noise of the infrared image is reduced, and the temperature measurement result precision is improved.

The invention provides an infrared radiation calibration precision test method based on a Boltzmann constant, and the method comprises the steps: enabling a reference black body to be switched into an infrared camera light path in a satellite in-orbit calibration mode, carrying out the full-aperture calibration, and obtaining the temperature of the black body, the state of a platinum resistor, and other parameters; acquiring calibration data such as gain and bias released by a calibration responsibility unit; calculating black body radiation brightness according to the Planck radiation law; radiance is calculated according to data such as calibration parameters and pixel DN values; constructing a precision test variable S1; according to data such as blackbody temperature, wavelength and radiation brightness, calculating a Boltzmann constant value under a specific inversion condition; constructing a precision test variable S2; and data such as variance, deviation and sensitivity are further calculated on the basis of S1 and S2, and the calibration precision is finely inspected and judged.

The invention discloses a closed gas controlled release test platform for testing infrared imaging equipment. The closed gas controlled release test platform comprises a gas source, a gas release box, a control system and an auxiliary system, the gas source is connected with the gas release box through a pipeline; the control system is respectively connected with the gas source, the gas release box and the auxiliary system; the auxiliary system is respectively connected with the gas source and the gas release box through pipelines; the gas release box comprises a gas chamber and a black body source; the air chamber and the black body source are arranged adjacently; the air chamber is in a cuboid shape. The invention provides a large-size closed gas controlled release test platform, which can be used for simulating hazardous gas leakage diffusion distribution in a real environment in a laboratory environment, obtaining the gas column concentration with the highest optical path of 1000mm, and flexibly adjusting the gas source type according to detection requirements. Concentration inversion algorithm development and concentration calibration of the infrared imaging equipment can be realized.

The invention relates to the related field of online monitoring devices, and discloses an infrared online monitoring field inspection device and method, and the method comprises the steps: 1, determining the position relation between a black body small hole and an object; 2, according to the position relation in the step 1, determining the movement mode of the black body small hole; 3, the black body small hole is driven to move according to the movement mode in the step 2, so that the black body small hole is aligned with the object, the devices are accurately inspected regularly on site, the fine change of the performance of electronic elements in the equipment can be found in time, the measurement precision is calibrated in real time, and the measurement accuracy is improved. Therefore, the accuracy and the reliability of judging the running state of the power equipment and the like are remarkably improved. Therefore, electric power operation and maintenance personnel can take targeted maintenance measures in advance, the probability of occurrence of equipment faults is effectively reduced, power failure time and economic loss caused by the equipment faults are greatly reduced, and a solid guarantee is provided for safe and stable operation of an electric power system.

The invention relates to an infrared image temperature calibration method and system. Error amount generated by distance measurement between an infrared radiation source and an infrared imager is determined through atmospheric transmittance. And calling object surface emissivity preliminary information to reduce the surface emissivity error amount of the infrared radiation source in the actual measurement process. Based on the atmospheric transmittance, a temperature and hyper-parameter joint estimation model can be formed by establishing an infrared radiation model and constructing a forward model. A Bayesian inference method is utilized to deduce the surface emissivity of an object, meanwhile, prior information of different measurement materials is considered, and model parameters and temperature distribution are reconstructed by combining an improved model with a maximum posteriori estimation method. The improved infrared thermal radiation model is suitable for scenes with different measurement distances, humidity factors and emissivity. Through verification of multiple experiments of the black body and the high-speed direct-driven fan, the method can significantly reduce the measurement error and improve the accuracy of temperature measurement.

The invention discloses a baffle-free infrared temperature measurement method, device, equipment and product, and relates to the technical field of infrared image processing, and the method comprises the steps: carrying out the non-uniform correction of an infrared image, and enabling the non-uniform correction to be used for improving the pixel error generated in the imaging process of infrared imaging equipment. After the non-uniform correction is completed, the high-low temperature box is controlled to be heated, backgrounds of blackbodies at different temperatures are collected at different movement temperatures, and a corresponding relation data set of the movement temperatures, the blackbody temperatures and blackbody pixels is obtained. And based on the corresponding relationship data set, fitting the relationship between the black body pixels of the q different temperature black bodies and the current movement temperature to obtain fitting pixel values of the q different temperature black bodies. Fitting the black body temperature and the fitting pixel value according to a Lagrange interpolation method to obtain a target function relational expression, and inputting the pixel value of the to-be-measured target into the target function relational expression to obtain the target temperature. The method can not only improve the dynamic range of temperature measurement, but also improve the measurement precision.

An apparatus for non-contacting measurement of the temperatures of rotatable elements, such as prism elements of a Risley prism assembly, includes IR emissive patches applied to radially outward facing surfaces of the rotatable elements, reflective surfaces configured to axially reflect black body IR radiation emitted by the patches, IR sensors located behind the rotatable elements and configured to sense the reflected black body radiation, and a controller configured to receive data from the IR sensors and determine therefrom the temperatures of the rotatable elements. In embodiments, none of the IR sensors extends radially beyond a housing of the rotatable elements, and in some embodiments the IR sensors do not extend radially beyond a diameter of a largest of the rotatable elements. The apparatus can further include patches oriented axially rearward and associated IR sensors.

The invention belongs to the technical field of optical ceramics and functional ceramic materials, and discloses a spinel ceramic material with high-temperature extinction and broadband high emissivity as well as a preparation method and application thereof. The chemical formula of the material is Cu (0.7-x) Ni (x) Cr (1.5) Mn (0.8-y) MyO4, M is Co and Fe, x is more than or equal to 0 and less than or equal to 0.5, y is more than or equal to 0 and less than or equal to 0.5, and different-valence or variable-valence metal elements (Ni, Co and Fe) and Mn are co-doped with copper-chromium spinel. The spectral emissivity of the ceramic material in the infrared band of 2.5-25 microns is gt; the emissivity spectrum curve is flat, the material has the characteristics of wide band, high emissivity and the like, and the emissivity of a coating prepared from the material is the spectral emissivity gt of the infrared band of 2.5-25 microns; and 0.95, the method has good application prospects in the fields of aerospace thermal control, aerospace craft thermal protection, industrial kiln energy saving, high-temperature extinction black bodies, optical camera extinction coatings and the like.

The lighting device may be configured to perform black body curve fading. For example, the control circuit may be configured to control the drive circuit such that the light emitted by the lighting load is adjusted (e.g., faded) along a black body curve. The control circuit may be configured to determine whether to fade from an initial color to a destination color in a Correlated Color Temperature (CCT) chromaticity space or an XY chromaticity space. The control circuit may be configured to determine whether the initial color and / or the destination color are on the black body curve. When the initial color and the destination color are determined to be on the black body curve, the control circuit may be configured to control the drive circuit such that the light emitted by the lighting device is adjusted from the initial color to the destination color along the black body curve.

The application provides a method and system for acquiring infrared video delay, comprising: capturing, by an infrared imaging device, an infrared video of a conversion process in which a black body is converted from a first state to a second state, and simultaneously capturing, by a high-speed camera, a normal video of the conversion process and an external display device used for displaying the infrared video; performing frame-by-frame analysis on the normal video to acquire a first time point at which the conversion process is completed on the display device and a second time point at which the conversion process is completed in the normal video; acquiring a difference between the first time point and the second time point, and determining the difference as an imaging delay of the infrared video. The same conversion process of the black body can be captured by a normal device and an infrared device to obtain a normal video and an infrared video, respectively, and the infrared imaging delay can be acquired through the normal video and the infrared video, so that the acquisition of the infrared imaging delay is fast and simple.

To make it possible to accurately measure a surface temperature of a device under test during testing. An inspection apparatus according to the present disclosure configured to test a device under test by contacting an electrode terminal of the device under test with a conductive contact to electrically connect between a tester and the device under test, includes: a device-under-test support unit that supports the device under test; an infrared-light receiving unit that receives infrared rays radiated from the device under test, at least the device under test being as an object to be temperature-measured; and a temperature measuring device having a temperature conversion function of converting the infrared rays from the infrared-light receiving unit into a temperature of the object to be temperature-measured, wherein the device-under-test support unit has a black body at a peripheral edge region or in a vicinity of the peripheral edge of the device-under-test support unit.

The invention relates to the technical field of space angle resolution infrared band emissivity measurement in a magnetic field environment, in particular to a space angle resolution infrared band emissivity direct measurement device and method. Comprising an adjusting piece, a heating piece arranged in the adjusting piece, a magnetic field generator arranged at the bottom of the adjusting piece, a placing frame arranged on one side of the magnetic field generator, a water cooling machine arranged at the bottom of the placing frame, and a light path adjusting piece and a spectrograph which are arranged at the top of the placing frame. The device has the beneficial effects that through the arrangement of the light path adjusting piece, the space angle resolution of a heat radiation signal of a sample to be measured can be realized, the measurement of an infrared full-angle resolution spectrum is realized, meanwhile, the emissivity of the sample is directly measured through a conventional reference black body, and the conclusion that the emissivity is equal to the absorptivity during heat balance is obtained; and a clear scheme and standard are provided for the direct measurement experiment of the non-reciprocal thermal emissivity induced by the magnetic field.

The invention relates to the technical field of optical measurement, in particular to a system and a method for measuring infrared transmissivity of a material under gas radiation interference, and the system comprises a gas heat source system, a transmissivity testing system and a data acquisition and processing system, the gas heat source system provides high-temperature radiation gas for a test cavity of the transmissivity test system; the black body and the spectrograph directly face two to-be-tested materials which are oppositely arranged on the test cavity; and the data acquisition and processing system acquires state parameters of the high-temperature radiation gas, the temperature of the to-be-measured material and optical signals of the spectrograph. According to the invention, the high-temperature radiation gas with controllable state parameters is provided for the test cavity through the gas heat source system, and different gas radiation interference environments are simulated; a spectrograph is used for measuring optical signals, and a data acquisition and processing system is used for acquiring state parameters of high-temperature radiation gas and the temperature of a to-be-measured material, so that data is provided for real infrared transmissivity calculation of the material under radiation interference of different gases.

The present application discloses a material emissivity measurement system and a material emissivity determination method, which relates to the emissivity measurement and radiation temperature measurement technology field, and solves the problem that the material emissivity obtained based on the measured temperature has low accuracy because the temperature of the sample surface will be changed by using a thermocouple to measure the sample temperature. The measurement system includes: a host computer, a temperature control device and a thermometer, the host computer is connected to the temperature control device and the thermometer, the temperature control device is controlled to heat the sample to be tested and the black body furnace to the set temperature, the thermometer is controlled to measure the first temperature, the second temperature, the third temperature and the fourth temperature of the surface of the sample to be tested when the shielding tube reaches different positions, and the host computer determines the target material emissivity of the sample to be tested according to the first temperature, the second temperature, the third temperature and the fourth temperature.

The invention discloses a serialized blackbody control system, which comprises a temperature control and acquisition unit, a power driving unit, a power device, a power module unit, a man-machine interaction unit and an interface unit, and is characterized in that the power device adopts a single ceramic flat-plate semiconductor refrigeration device as a standard and is positioned on the back surface of a blackbody radiant panel; temperature acquisition and temperature control functions of the blackbody radiation source are respectively completed; controlling the power of the power device; providing a human-computer interaction interface; a temperature control and acquisition unit, a power supply module and a power driving unit form a control assembly module, and interfaces of the three units and an installation fixing support are standardized. The method can achieve the universal control of the serialized blackbody, and can shorten the design period of the serialized blackbody.

An apparatus for non-contacting measurement of the temperatures of rotatable elements, such as prism elements of a Risley prism assembly, includes IR emissive patches applied to radially outward facing surfaces of the rotatable elements, reflective surfaces configured to axially reflect black body IR radiation emitted by the patches, IR sensors located behind the rotatable elements and configured to sense the reflected black body radiation, and a controller configured to receive data from the IR sensors and determine therefrom the temperatures of the rotatable elements. In embodiments, none of the IR sensors extends radially beyond a housing of the rotatable elements, and in some embodiments the IR sensors do not extend radially beyond a diameter of a largest of the rotatable elements. The apparatus can further include patches oriented axially rearward and associated IR sensors.

The invention relates to an optical target based on a three-dimensional cavity type structure. The optical target comprises a black box body and a white plate, a round hole is formed in one side surface of the black box body, and a light absorption cavity is formed in the box body; the white plate is connected with the black box body and arranged in the round hole, and an annular area communicated with the light absorption cavity is formed between the white plate and the black box body. When light irradiates the optical target, one part of the light is reflected by the white plate, and the other part of the light enters the annular area around the white plate and then enters the light absorption cavity, and the light is gradually attenuated after being reflected for multiple times in the cavity, so that an extremely low gray value close to a theoretical black body is formed in the annular area; the boundary between the light spot formed on the white plate and the annular area is distinct, and a good gray difference is formed between the light spot and the annular area.

The invention discloses a high-temperature blackbody radiation source for spectrum calibration, and relates to the technical field of satellite-borne blackbodies, the high-temperature blackbody radiation source comprises a blackbody, a heating device and a heat insulation device, the blackbody is made of an inorganic material; the heating device is configured to heat the black body; the heat insulation device is provided with an inner cavity, the black body is arranged in the inner cavity, and the heat insulation device is provided with an incident port corresponding to the black body. According to the high-temperature blackbody radiation source for spectrum calibration, the blackbody is made of the inorganic material, organic matter deflation pollution does not exist at the high temperature, the risk of organic matter deflation pollution is further reduced, heat insulation is conducted on the blackbody through the heat insulation device, and it is avoided that the performance of surrounding instruments is affected by the high temperature of the blackbody.

The invention discloses a wafer infrared transmittance measuring device and method, and the device employs a heat preservation box body which is a closed box body, and can guarantee the consistency of the internal environment temperature after full isothermal treatment. A surface source black body is arranged in the heat preservation box body as a radiation background; the temperature of the surface source black body can be randomly set by a user; a tested wafer parallel to the surface source black body is arranged at a position, close to the surface source black body, in the heat preservation box body; the shooting end of the infrared camera faces the wafer to be measured, the distance between the shooting end of the infrared camera and the wafer to be measured meets the requirement that the shooting range completely envelops the whole wafer to be measured, and the wafer to be measured is measured by adopting a full-screen method. During measurement, different working temperature points are set, an infrared camera is used for sampling the whole wafer to be measured for multiple times, obtained data are fitted through a computer, and finally the infrared band average transmittance value of the wafer to be measured is obtained. The problems that an existing wafer infrared transmittance measuring method is high in cost and complex in operation can be solved.

The invention provides a blackbody performance automatic test device and test method, the blackbody performance automatic test device comprises a test board, a test instrument, a moving mechanism, a control unit and an automatic test system, the test board comprises a plurality of liftable test stations arranged side by side, and the test stations are used for placing blackbody radiation sources to be tested; the testing instrument is located on the moving mechanism, and the moving mechanism is used for achieving three-dimensional movement of the testing instrument in the space; the control unit is respectively connected with the plurality of liftable test stations and the moving mechanism so as to control the movement of the liftable test stations and the moving mechanism; the automatic test system is respectively connected with the control unit and the test instrument so as to control the test instrument to automatically test the tested blackbody radiation source. Through the control unit and the automatic test system, the omnibearing automatic test of the tested black body is realized, the work of repeatedly moving a test instrument by a worker is reduced, and the working efficiency is improved.

The application discloses an infrared micro scanning lens displacement testing system and method, which comprises the following steps: self-calibrating a lens to be tested; focusing an infrared sensor, and inputting a digital video image of the infrared sensor with the adjusted focal plane into a display control testing unit; selecting a target based on a target generating unit, and selecting a target frequency according to a set multiple of a sampling frequency; adjusting a differential black body temperature of the target generating unit to a non-saturation imaging interval of the infrared sensor, testing a first center position of target imaging of the lens to be tested; adjusting the lens to be tested to a position after micro scanning, and testing a second center position of target imaging of the lens to be tested again; and determining a micro displacement variation of an image plane of the lens to be tested before and after micro scanning based on the first center position and the second center position. The application provides a micro scanning system process detection means, and provides original data support and testing means for a system to obtain a high-quality super-resolution reconstructed image.

The invention discloses an infrared radiation temperature measurement calibration method and system, the method can be applied to an infrared radiation calibration system, and the system can comprise black body equipment, an infrared radiation thermometer, a thermal insulation sleeve, a thermostatic bath and a processing device. The method comprises the following steps: sequentially sending M target temperatures to black body equipment, and sequentially sending N preset environment temperatures to a thermostatic bath at each target temperature; wherein M and N are integers greater than or equal to 1. And acquiring real-time environment temperatures and real-time light intensity voltage values acquired by the infrared radiation thermometer when the black body equipment is at different target temperatures and the thermal insulation sleeve is at different preset environment temperatures. And performing fitting processing on the M target temperatures, and the real-time environment temperatures and the real-time light intensity voltage values collected at different target temperatures and different preset environment temperatures based on a preset fitting algorithm to obtain a calibration coefficient. The objective of the invention is to solve the problem of low efficiency of manually setting a blackbody radiation source in an infrared radiation calibration mode.