45 results about "Black body" patented technology

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.

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.

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 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 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.

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 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.

The application discloses a heating structure of a curved black body, which comprises a heat-conducting seat, a heat-conducting seat and a black body radiation source which are sequentially stacked and installed, wherein the heat-conducting seat, the heat-conducting seat and the black body radiation source are all concave structures, the concave surface of the black body radiation source is a curved surface, a heat-conducting medium is filled in the gap between the heat-conducting seat and the heat-conducting seat and the black body radiation source, and the heat-conducting medium comprises a flexible medium and a granular medium. The application is used for the K scene of a temperature measurement module, heat transfer is performed on the curved black body radiation source, uniform heating of the curved black body is realized, the heat transfer effect is stable, and the K effect of the module can be effectively improved.

The invention relates to the technical field of infrared thermal image temperature measurement and equipment state evaluation, and particularly discloses an infrared emissivity-distance joint estimation method based on multi-angle consistency. According to the method, multi-view infrared images of the same target are obtained, a target function fusing radiation consistency and physical constraints is constructed, the surface temperature, the observation distance and the directional emissivity of the target are solved in a combined mode through an alternating minimization strategy, and finally correction temperature, temperature difference and uncertainty evaluation results are output. According to the invention, a black body does not need to be attached or accurate distance measurement in advance is not needed, and high precision and strong robustness of temperature measurement under complex field conditions are realized.

The invention relates to the technical field of optical metering and testing, in particular to an in-situ measurement device and method for surface infrared spectral emissivity of a high-frequency induction wind tunnel stationary point test model. Comprising a heating wind tunnel, a light path switching unit, a motion unit, a temperature detection unit, an infrared spectrometer and a variable temperature black body. The heating wind tunnel is used for simulating and manufacturing a plasma ultra-high-temperature environment for the aircraft test model in the heating wind tunnel when the aircraft returns to the atmosphere; the light path switching unit is used for reflecting light of the aircraft test model to the infrared spectrometer; or the light of the variable-temperature black body is reflected to the infrared spectrometer; an emergent light path of the light path switching unit is a first light path; the motion unit is used for moving the temperature detection unit into or out of the first light path; the temperature detection unit is used for detecting the temperature of the aircraft test model when the temperature detection unit moves into the first light path; the infrared spectrometer is located on the first light path and used for measuring spectral signals of the aircraft test model and the variable-temperature black body.

The invention discloses a method for generating a temperature measurement curve of a departure type thermal infrared imager, and the method comprises the steps: enabling a measured thermal infrared imager to be at a target environment temperature, enabling a calibration black body to be at another stable normal temperature, achieving the physical isolation of the measured thermal infrared imager and the calibration black body from the environment, and avoiding the risk that the black body is liable to be damaged at an extreme temperature; after the temperature of the thermal infrared imager is stable, radiation intensity characterization values of the normal-temperature black body at different temperatures are collected and fitted to generate a preliminary temperature measurement curve; and finally, correcting the initial temperature measurement curve through a pre-calibrated linear mapping relation to obtain a final temperature measurement curve. The linear mapping step can systematically compensate the measurement deviation caused by the difference between the thermal infrared imager and the black body environment, so that the accuracy of the curve obtained under the off-field condition is close to the ideal same-field condition, and the technical problem that the high-accuracy temperature measurement curve cannot be obtained under the extreme environment temperature is effectively solved on the premise of ensuring the safety of equipment.

The invention discloses a temperature measurement method based on an infrared camera, and the method comprises the following steps: 1, collecting truth value data, and constructing a truth value table of temperature and raw value; 2, carrying out pixel point level temperature measurement, and checking a truth table according to the raw value of each measured pixel point; determining a temperature value obtained by performing linear interpolation on two adjacent points of the raw value of each pixel point in the truth table; 3, raw data of the infrared camera in the pixel point level temperature measurement process are obtained; and calibrating raw data of existing different batches of infrared cameras to the interval of the truth table through linear mapping. According to the method, the truth value data is obtained by using the black body to establish the truth table, the raw value and temperature conversion is performed by using the linear interpolation lookup table method and the Hermite interpolation, and the data of different batches of infrared cameras are calibrated through linear mapping, so that the temperature measurement precision is improved.

The invention belongs to the technical field of nuclear magnetic resonance gyroscopes, and relates to a device and a method for measuring longitudinal relaxation time of a miniaturized atomic air chamber. The measuring device comprises: a miniaturized atomic gas cell; the pumping light and light path structure comprises a pumping light laser, a pumping light polarizer, a quarter-wave plate and a light absorption black body which are sequentially arranged along the Z axis; the detection light and light path structure comprises a detection light laser, a detection light polarizer, a half-wave plate, a first right-angle prism reflector, a second right-angle prism reflector, a polarization splitting prism, a first photoelectric detector and a second photoelectric detector which are sequentially arranged along a detection light path; the temperature control system comprises non-magnetic heating devices arranged on the two sides of the miniaturized atomic gas chamber and a temperature control circuit; the magnetic field control system comprises a double-layer magnetic shielding cover, a three-axis magnetic field coil arranged on the outer side of the miniaturized atomic gas chamber, and a magnetic field control circuit; and the signal processing system performs fitting calculation on the longitudinal relaxation time.

The invention provides an optical calibration method and system suitable for infrared characteristics of a small target in the air, and the method comprises the steps: calibrating the pixel response of a detector under different integral time conditions through a standard black body, converting the pixel response into the radiance of an incident detector image screen, and obtaining a standard detector gray curve; on the other hand, after the dynamic small target image in the air is collected and the influence of background noise is removed, the radiation characteristics of the small target image at different distances are calculated through the gray scale response curve of the detector, and high measurement precision and engineering value are achieved; according to the method, the dynamic infrared radiation characteristic of a typical target can be rapidly calibrated in engineering.

Embodiments of the present application provide a satellite remote sensing instrument radiation calibration method, device, equipment and storage medium. Including: obtaining a first radiation calibration coefficient set; the first radiation calibration coefficient set is a set of radiation calibration coefficients obtained based on a preset radiation source arranged at the front end of the optical path of the satellite remote sensing instrument; obtaining a second radiation calibration coefficient set and a non-radiation transfer component temperature value; the second radiation calibration coefficient set is a set of radiation calibration coefficients obtained based on a preset black body arranged between internal optical path components of the satellite remote sensing instrument; the non-radiation transfer component temperature value is the temperature value of a non-radiation transfer optical path component inside the satellite remote sensing instrument that does not participate in radiation transfer when observing the preset black body; using the second radiation calibration coefficient set and the non-radiation transfer component temperature value as training samples, and using the first radiation calibration coefficient set as a training label to perform model training, to obtain a calibration coefficient conversion model. The present scheme can improve the accuracy of radiation calibration.

The invention discloses a device and method for testing the detection distance of an infrared camera, and solves the technical problems that an indoor test device is large in size and an external field test is seriously influenced by weather, and the device for testing the detection distance of the infrared camera comprises a collimator, an electric target wheel, a surface source black body, an infrared camera installation position and a control computer. An infrared camera mounting position is arranged at a preset distance away from the exit port of the collimator; an electric target wheel is arranged at an incident port of the collimator; the control computer is electrically connected with the electric target wheel and is used for controlling the automatic switching of a plurality of target positions of the electric target wheel, so that the target on any one of the plurality of target positions is positioned at the focal plane of the collimator; the surface source black body is located on the side, away from the collimator, of the electric target wheel and used for irradiating the target, and the radiation aperture of the surface source black body completely covers the target located on the focal plane of the collimator. The control computer is connected with the surface source black body to control the temperature of the surface source black body; and the control computer is connected with the infrared camera so as to receive an infrared image shot by the infrared camera.

The application relates to the field of infrared temperature measurement technology and discloses an infrared temperature measurement method, device, equipment and storage medium, the method comprising the following steps: photographing a to-be-measured temperature object, and obtaining a current pixel value of the to-be-measured temperature object according to a photographing result; obtaining a target temperature of the to-be-measured temperature object based on the current pixel value and a preset mapping relationship table, wherein the preset mapping relationship table is obtained by constructing sample pixel values corresponding to black bodies with different sample temperatures. The application analyzes the photographing result of the to-be-measured temperature object, determines the current pixel value of the to-be-measured temperature object, and obtains the target temperature of the to-be-measured temperature object based on the current pixel value and the preset mapping relationship table obtained by constructing the sample pixel values corresponding to the black bodies with different sample temperatures. It is indicated that the application does not need to install a black body in a temperature measurement environment where the to-be-measured temperature object is located, so that the infrared temperature measurement of the to-be-measured temperature object is simple.

The invention relates to a point target simulation device and method for infrared alarm equipment, and belongs to the technical field of infrared alarm, and the device comprises a surface source black body which is used for simulating the infrared radiation of an infrared point target; and the synchronous diaphragm mechanism comprises an electric diaphragm which is arranged on the surface source black body radiation surface and is used for controlling the diameter of the circular hole to simulate the distance change of the infrared point target, a rotation driving mechanism for driving the electric diaphragm to rotate, and a lifting driving mechanism for driving the electric diaphragm to lift. According to the device, the azimuth movement of the infrared point target can be simulated by controlling the rotation angular velocity of the electric diaphragm, the pitching movement of the infrared point target can be simulated by controlling the electric diaphragm to move in the vertical direction, and the distance change of the infrared point target can be simulated by controlling the diameter of the circular hole of the electric diaphragm; dynamic simulation of an infrared point target is realized, the method can be used for performance detection and test experiments of infrared alarm equipment, and the dependence on a real object target and a test environment in a traditional experiment method is overcome.

The application discloses a self-locking crank and cam black body in-orbit calibration mechanism, which is characterized in that two ends of the mechanism are connected with a radiation black body and a low-temperature optical cold box body respectively, the black body is arranged in a light transmission hole, and other parts of the mechanism are arranged outside the light transmission hole. The mechanism comprises a crankshaft, a radiation black body shell, a cam groove black body transmission rod, a sliding guide rail, a stepping motor, a crankshaft locking pressing block, a travel switch, a motor and spring adapter plate and a mechanism mounting seat. When a detector emits, the crankshaft is located in a self-locking stroke of the cam groove, and the whole mechanism is mechanically self-locked so that the black body is located at the side of the light transmission hole; after the detector (satellite) enters an orbit, the crankshaft is driven by the stepping motor to drive out of the self-locking area, the black body is pushed into the center position of the light transmission hole through the cam groove and the guide rail, and radiation calibration is carried out. The patent solves the problem of different installation interfaces of the radiation black body and the self-locking driving mechanism under the condition of the internal limit installation space of the optical load.

The invention discloses a light source device capable of quickly, continuously and accurately simulating infrared characteristics of a target, which solves the problem that an existing black body cannot quickly, continuously and accurately simulate the infrared characteristics of the target, and specifically comprises an infrared transmitter, an integrating sphere, a dimming assembly and a driving assembly, the infrared emitter is used for emitting infrared light; the light inlet of the integrating sphere corresponds to the emitting end of the infrared emitter and is used for carrying out diffuse reflection on the infrared light; the dimming assembly is arranged between the emitting end of the infrared emitter and the light inlet of the integrating sphere and is used for adjusting the energy of the infrared light; the action end of the driving assembly is connected with the dimming assembly and used for driving the dimming assembly to carry out adjustment.

The embodiment of the application discloses a temperature measurement method and a thermal imaging temperature measurement device. The method can comprise the following steps: measuring the background temperature of the environmental background in a picture by the thermal imaging temperature measurement device; and taking the background temperature as a temperature measurement standard to calculate the temperature of a current target object. According to the embodiment, a reference standard is provided for the thermal imaging temperature measurement device without a black body, so that the influence of factors such as wind on the temperature measurement accuracy is reduced, and the temperature measurement accuracy is improved.

The invention relates to the technical field of radiation and spectrum calibration of space remote sensing instruments, and provides a device and a method for measuring the polarization effect of a satellite-borne infrared remote sensing instrument. In order to solve the problem of measurement errors caused by the polarization effect due to rotation of a scanning mirror commonly existing in the current satellite-borne infrared remote sensing instrument, the invention provides the measurement device for the polarization effect of the satellite-borne infrared remote sensing instrument, and a high-rotation-precision motor drives a surface source black body and an infrared remote sensing load to rotate at the same angle. The infrared remote sensing load is enabled to always point to the surface source black body at different scanning angles, surface source black body radiation spectrums of the infrared remote sensing load at different scanning angles are obtained, and then polarization effect correction of the infrared remote sensing instrument is carried out by utilizing a polarization correction theoretical formula based on the radiation spectrums. The automatic correction of the polarization effect of the infrared remote sensing instrument is realized in a space exploration on-orbit application scene, and the method is convenient to use and has relatively high correction efficiency and correction precision.

To provide an induction heating flaw detection method and an induction heating flaw detection device capable of easily discriminating a flaw even if blackbody treatment is incomplete.SOLUTION: An induction heating flaw detection method includes an application step of applying a black body paint, a heating step of heating a surface of a conductive material by changing a relative position between the conductive material and an induction heating unit, an extraction step of extracting a high temperature portion by acquiring a surface temperature of the conductive material after the heating is finished by a radiation thermometer, a tracking step of tracking the high temperature portion, and a determination step of determining whether the high temperature portion is a flaw or a noise based on a temporal temperature change of the high temperature portion. The induction heating flaw detector includes an application unit that applies black body paint, an induction heating unit that heats a surface of a conductive material by changing a relative position with the conductive material, an extraction unit that extracts a high temperature portion by acquiring a surface temperature of the conductive material after heating by a radiation thermometer, a tracking unit that tracks the high temperature portion, and a determination unit that determines whether the high temperature portion is a flaw or a noise based on a temporal temperature change of the high temperature portion.SELECTED DRAWING: Figure 6

The present application belongs to the technical field of equipment calibration, and particularly relates to an infrared radiation measuring equipment response slope calibration device and method. The infrared radiation measuring equipment comprises a telescope barrel, and the calibration device comprises a cylinder, a lens cover, a diffuse reflection plate and a black body. The cylinder is sleeved on the outer edge of the front end of the telescope barrel, the lens cover covers the aperture of the cylinder, the diffuse reflection plate is attached to the inside of the lens cover and is synchronously turned with the lens cover, and the black body is arranged outside the lens cover and can be connected and detached. The aperture of the opening on the lens cover is smaller than the aperture of the black body. The calibration range of the method meets the requirements of low-end and high-end ranges, the cost is relatively low, and obvious economic benefits are achieved.

The application discloses a visible light and infrared dual-purpose axial plumb infinite distance target device and a calibration method, wherein the device comprises a base which is concave; a support platform which is installed in the middle concave part of the base; a reference platform which is installed on the support platform; a rack which comprises a vertical longitudinal arm and a horizontal arm which are perpendicular to each other, the longitudinal arm is vertically fixed on the base, and the horizontal arm is placed above the assembly reference platform; a black body light source, a fluorescent lamp and a Cassegrain collimator are sequentially arranged on the horizontal arm in the vertical direction, and the optical axis of the Cassegrain collimator is adjusted to be axial plumb. The device has high stability.

The invention discloses a device for generating extreme ultraviolet radiation based on a cavity emptying laser system, and belongs to the field of extreme ultraviolet light sources. The device comprises a resonant cavity structure, a focusing lens group and a rotating disc, the front-stage focusing lens focuses a horizontal laser beam to the surface of the rotating disc, and the rear-stage focusing lens shapes the light beam passing through the rotating disc; the rotating disc and the main axis of the resonant cavity light path form a preset angle; n periodic areas, namely a black body absorption area, an air passage area and a Sn-plated target excitation area, are arranged on the rotating disc in sequence; the rotating disc periodically cuts different areas into a resonant cavity light path; the black body absorption region suppresses laser oscillation in the resonant cavity structure so as to accumulate the number of reversal particles; the air passage area is of a hollow structure, and when the number of reversal particles reaches the maximum value, the air passage area cuts into the resonant cavity to form giant pulse laser; and the Sn-plated target excitation region generates extreme ultraviolet light under the action of the giant pulse laser. And the function of simply generating extreme ultraviolet radiation is realized.

The present application belongs to the field of optical measurement and test, and discloses a high-temperature material spectral emissivity measuring device and method based on a temperature-controlled diaphragm. The measuring device is composed of a standard black body, a temperature-controlled diaphragm, an electrically-controlled rotating mirror, a sample heating furnace, a three-dimensional platform, an optical collimation system and a Fourier transform infrared spectrometer. The present application adopts a liquid circulation type temperature-controlled diaphragm, and the surface temperature of the diaphragm is the same as the laboratory environment temperature. In the spectral emissivity measurement, a diffuse reflection plate with a reflectivity of 1 does not need to be introduced, and a vacuum constant temperature system is also not needed. The present application can eliminate the influence of environmental radiation and atmospheric transmittance, and improve the spectral emissivity measurement precision. The present application designs a gradual diaphragm to realize the selection of the effective detection area of the material sample, and realizes the high dynamic range measurement of the infrared radiation signal in a wide temperature range.