136 results about "Black body" patented technology

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 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 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 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.

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.

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 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.

The application discloses a device for acquiring a mathematical model for eliminating residual image of infrared image and a use method thereof, which comprises a black body, a lens, a baffle, a signal processing board and an interface board connected in sequence; the lens is directed to the black body and collects infrared rays emitted and / or reflected by the black body; the baffle is an infrared shutter; the signal processing board is used for controlling the lens and the baffle to work according to instructions from a computer; and the interface board is used for connecting the signal processing board with the computer through a network port, sending data to the computer and accepting instructions from the computer. In use, data acquisition is firstly performed; then a decay function is fitted; and finally the fitted decay function is verified, which specifically comprises multiple experimental verification, chip working temperature influence verification and adaptability verification at different temperatures. The application can better adapt to residual image characteristics, increase accuracy, reduce noise interference on fitting, enhance robustness, reduce redundant calculation, and effectively improve processing speed on the premise of ensuring residual image elimination effect.

A net zero power communications system comprising a laser beam generator, a black body, a cooled cavity, an optical absorber in the cooled cavity, and a controller. The controller is configured to identify information for transmission. The controller is configured to control the laser beam generator to emit laser beam pulses at the optical absorber layer that changes a temperature of the optical absorber layer with a pattern that causes the optical absorber layer to emit black body radiation from the cooled cavity to thereby encode the information.

The application provides a detector gain adjustment method applied to an infrared thermal imager, and comprises the following steps: (A1) setting a detector gain parameter of the infrared thermal imager as a reference value; (A2) using a black body for calibrating temperature T0 to obtain a gray value A by using the infrared thermal imager with the adjusted gain parameter; using a black body for calibrating temperature T1 to obtain a gray value B by using the infrared thermal imager, wherein T1>T0; (A3) classifying according to the gray values A and B, adjusting the detector gain parameter, and entering step (A2) until the gray values A and B meet the requirements, and outputting the gain parameters F, INT and S at this time. The application has the advantages of automatic operation, small error and the like.

A multi-channel spliced large-area array infrared camera relative radiation correction method belongs to the technical field of spaceflight optical remote sensing, and comprises the following steps: calculating a non-uniform correction coefficient based on onboard blackbody calibration data; acquiring an on-orbit image, correcting the on-orbit image, acquiring a corrected image, and acting on the corrected image by using the secondary correction coefficient and the channel correction coefficient calibrated in the laboratory to obtain a channel corrected image; a plurality of in-orbit images containing different time periods and scenes are accumulated, pixel gray value sequences corresponding to a preset reference channel and a to-be-corrected channel are extracted as sample data according to design values of overlapping pixels between channels of the in-orbit images, and the sample data of the to-be-corrected channel and the reference channel are taken as an x axis and a y axis respectively, so that the to-be-corrected channel is obtained. And according to the quadratic function correction model, correction based on the overlapping area is carried out on the image after channel correction, long-term calibration and correction of the on-orbit detector pixel response relative change under the condition that the inner black body is stable are realized, and the on-orbit image radiation quality is improved.

The invention provides an infrared correction device for an optical system, and belongs to the technical field of infrared photoelectric detection systems. A sliding unit; the black body is fixed on the sliding block of the sliding unit, the sliding block is fixedly connected with the spectroscope, and the black body is located on one side of the projection surface of the spectroscope and used for providing a constant-temperature black body light source for the infrared detector; and the driving mechanism drives the black body to cut in or out of the optical path of the optical system. According to the infrared correction and wave band light splitting device based on the constant-temperature source black body, through matching parameter design among the units, non-uniform correction is carried out on an infrared optical system, the influence of environmental factors on the infrared optical system is greatly reduced, and the imaging quality of the infrared optical system is ensured; and due to waveband light splitting, the common-aperture multi-waveband fusion design of the optical system is realized, and the function of the product is improved.

There is provided a lighting device (1) comprising a first (111), a second (112) and a third (113) light source. The first light source emits a first light output, being a white light output having a first correlated color temperature (104) and a first color point located above the black body locus (103) in a CIE 1931 xy chromaticity diagram. The second light source emits a second light output, being a white light output having a second correlated color temperature and a second color point located above the black body locus. The second correlated color temperature is at least 500 K higher than the first correlated color temperature. The third light source emits a third light output having a third color point with an x-value in a range of 0.28 to 0.38 and a y-value in a range of 0.13 to 0.23.

The application discloses a kind of blackbody responsivity test device and method, by signal input module to be measured unit and reference unit respectively provide same test signal;By light source processing module, the first light emitted by blackbody module is converted into the second light of required wave band, and the second light is divided into two beams, and is respectively shot to be measured unit and reference unit;By signal analysis and calculation module, the first output signal voltage of measured unit and the second output signal voltage of reference unit are respectively measured, and according to the known first nominal area of measured unit and the second nominal area of reference unit, and the second blackbody responsivity of reference unit, the first blackbody responsivity of measured unit is calculated, can eliminate the loss of light emitted by blackbody in transmission process, and error between theoretical calculation and actual measurement, improve measurement accuracy.

The invention discloses a portable laser infrared composite target simulator which comprises a laser infrared composite target simulator body and a control case. The laser infrared composite target simulator main body comprises a card type optical system, a composite light path window, a pluggable target, a laser collimation focusing system and a blackbody radiation source, and the composite light path window, the pluggable target and the card type optical system are sequentially arranged in the light path direction; the laser collimating and focusing system introduces and focuses laser to the composite light path window, the composite light path window composites the laser and infrared light emitted by the blackbody radiation source to form a composite light beam, and the composite light beam penetrates through the pluggable target and finally enters the cassette optical system; and the control case is connected with the laser infrared composite target simulator main body through the laser optical fiber and the black body control cable, and is used for adjusting parameters of the laser and the infrared light emitted by the black body radiation source. The target simulator provided by the invention is small in size, light in weight, good in portability and high in adaptability to different test environments.

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.