38 results about "Infrared radiometer" patented technology

The invention discloses a calibration device of an infrared radiometer and a calibration method of the infrared radiometer, belonging to the field of infrared measurement. The device comprises a standard infrared radiation source, an infrared optical collimation system and a plurality of standard detectors and computers; the infrared optical collimation system is formed by a plane mirror and an off-axis parabolic mirror. The infrared radiation emitted by the standard infrared radiation source is received by a calibrated infrared radiometer or a standard detector directly or after being collimated by the infrared optical collimation system, and the measuring voltage of the collimated infrared radiometer or the standard detector is obtained correspondingly; the standard infrared radiation source is shielded, so that the collimated infrared radiometer or the standard detector receives the background radiation directly or via the infrared optical collimation system and correspondingly obtains the background voltage of the collimated infrared radiometer or the standard detector, thereby calculating the radiance responsiveness curve of the infrared radiometer. The device and the method disclosed by the invention solve the responsiveness calibration problem of large view infrared radiometer, and the calibration precision is high.

The invention discloses an infrared radiometer and belongs to the field of testing of optical metrology. The infrared radiometer is used for measuring radiation temperature of a thermal infrared imager testing device and is mainly characterized in that the infrared radiometer adopts double optical paths, a detector in the infrared radiometer is respectively subjected to the radiation of the thermal infrared imager testing device and the radiation of an internal reference black body of the infrared radiometer, the temperature of the reference black body is controlled by a computer and is kept consistent with the internal temperature and environment temperature of the infrared radiometer, and solid angles formed by the two optical paths and the detector are identical and the two paths coincide through the design of a limiting diaphragm group and confirmation of the installing positions of the limiting diaphragms. The infrared radiometer has miniaturized and intelligentized characteristics and has the advantages of being high in measuring accuracy and wide in application prospect.

The invention relates to the technical field of optical tests, in particular to an external field type infrared radiometer. According to the infrared radiometer, a main convergence mirror is connected with a wave chopper; the wave chopper is connected with a standard reference black body source and light filters; the light filters are connected with neutral attenuation pieces; the neutral attenuation pieces are connected with optical spectrum correcting pieces; the optical spectrum correcting pieces are connected with an infrared detector; a signal acquisition part is connected with the infrared detector and the wave chopper respectively. Through the embodiment, a corresponding optical spectrum curve of a whole system in a measurement waveband can be enabled to be a flat curve through the optical spectrum correcting piece, the linearity and the measurement accuracy of the whole system are improved, and the influence of a radiation spectrum of a tested object on a measurement structure is avoided; the neutral light filters with different attenuation ratios are adopted and the dynamic range of equipment is expanded. Therefore, the equipment has a plurality of ranges and strong and weak radiation targets can be measured.

The invention relates to a processing method for detecting clouds on sea by polar orbit meteorological satellite visible and infrared radiometer (VIRR), which belongs to the field of meteorological remote sensing technology. According to the processing method, firstly first-grade observation data of the polar orbit meteorological satellite visible and infrared radiometer (VIRR) after positioning and scaling and corresponding sea-and-land template information are identified, thereby obtaining sea observation data; for sea image elements, information such as split window brightness temperature, brightness temperature difference, satellite zenith angle and sea temperature regression coefficient is used for performing sea surface temperature inversion; according to the characteristic of the VIRR instrument, statistical analysis is performed based on a matching data set of a long time sequence, and a temperature threshold is set; when the observed brightness temperature and the inversed sea temperature or the inversed sea temperature and the climatic sea temperature of the sea image element exceed a preset threshold, a fact that the sea image element is the image element with a cloud is determined. Compared with the prior art, the temperature threshold is set by means of the clinic change rule of the sea surface temperature and long-time sequence statistical information of the satellite detecting instrument VIRR; quantitative calculation or judgment for cloudy or sunny is performed on a target; and accuracy for detecting the clouds on the sea is improved.

The invention discloses a ground-based meteorological microwave radiometer system based on a dual-frequency antenna and a measurement method. In the ground-based meteorological microwave radiometer system, an atmospheric pressure sensor, an infrared radiometer, a GPS, a temperature and humidity sensor, and a rainfall sensor are connected to a data acquisition and control device which is connected to a computer. The device of each system is powered by a power supply module. A room temperature blackbody calibration source is installed in a microwave radiometer which is formed by a K band antenna, a K band receiver, a V band antenna, and a V band receiver. The K band antenna is connected to the K band receiver. The V band antenna is connected to the V band receiver. Both the K band receiver and the V band receiver are connected to the data acquisition and control device, and the K band antenna and the V band antenna are installed back to back. A motor controls the rotation of the whole microwave radiometer. According to the radiometer of the invention, a dual-frequency independent rotating antenna is used to substitute a dual-frequency antenna with a polarization grid shared reflection surface or paraboloid.

The invention discloses an infrared radiometer proportional constant calibration method on the basis of a standard plane source black body and belongs to the field of infrared optimal radiation. The calibration method aims at the characteristics that a chopper of a current infrared radiometer is sprayed with high-emissivity black paint and the current infrared radiometer is provided with four temperature probes; when the temperature of the chopper is equal to that of a built-in temperature control reference black body, a signal is acquired, so that additional radiation of the chopper is avoided entering a detector; and moreover, in the signal acquiring process, the environment temperature, the temperature in a shell and the temperature of the chopper are requested to be equal to enable radiation among the environment, the shell and the chopper is dynamically balanced, and thus, influence of additional radiation of the chopper, the inside of the shell, the environment and the like can be eliminated. In addition, in the calibration method, calibration of a plurality of temperature points is also carried out in a common environment temperature range, so that the defect of replacing a plane with points in a conventional method, i.e. one temperature point replaces a plurality of temperature points to carry out calibration, is overcome. Compared with the prior art, the infrared radiometer proportional constant calibration method has higher accuracy.

The invention provides an environmental thermal infrared irradiance measuring device and a measuring method thereof. The measuring device includes a matte gold plated cover plate, thermocouple placing grooves, thermocouple sensors, a water container, a main engine of a thermocouple temperature measuring instrument, and a thermal infrared radiometer, wherein the thermocouple placing grooves are milled and formed in the lower surface of the matte gold plated cover plate, and are provided with downward openings; the thermocouple sensors are placed in the thermocouple placing grooves; the matte gold plated cover plate is arranged at the top of the water container; the top ends of the thermocouple placing grooves are lower than the upper edge of the water container; and the thermocouple sensors are electrically connected with the thermocouple temperature measuring instrument. The measuring method includes the steps of: collecting and calculating the black-body radiation on the upper surface of the matte gold plated cover plate through thermocouples; measuring the emergent radiancy of the matte gold plated cover plate through the infrared radiometer; and obtaining the sky thermal infrared downlink radiation or the environmental thermal infrared irradiance via the conversion formula. The device is the only device for directly measuring the sky hemisphere integral downlink radiation, and the precision in temperature measurement for the outer surface of the naked matte gold plated cover plate is greatly improved.

The invention discloses a target infrared integral radiation intensity test method and device based on a thermal infrared imager. The device comprises the thermal infrared imager, an infrared filter,a laser range finder and a data acquisition computer. The method includes the steps of selecting the infrared filter and mounting the infrared filter on the thermal infrared imager according to the test waveband requirement of the target integral radiation intensity; adjusting the distance between the thermal infrared imager and a measured target; adjusting the focal length of a lens of the thermal infrared imager, setting target emissivity parameters, selecting a target area in an observation window of the thermal infrared imager, determining the pixel range occupied by the target, collectingthe apparent temperature distribution of the measured target through a computer; measuring the distance between the target and the thermal infrared imager; calculating the atmospheric transmissivityunder the measurement distance; and calculating the infrared integral radiation intensity of the measured target. Measurement of the infrared integral radiation intensity is not limited by an infraredradiometer and other integral radiation measuring instruments any more. The method and the device have the advantages of being low in measurement cost, high in test precision, wide in application prospect and the like.

The invention discloses a sky hemisphere thermal infrared atmospheric downward radiation ground measurement method. through approximate expression of thermal infrared directional atmospheric downwardradiation, a linear relationship model between directional atmospheric downward radiation and an observation angle cosine value is constructed; and further in combination of an angular integral relationship between the directional atmospheric downward radiation and sky hemisphere atmospheric downward radiation, a simplified model for using a slope and an intercept in the linear relationship modelto calculate the sky hemisphere atmospheric downward radiation is developed. As long as an infrared radiometer on the ground is used to perform three times of measurement on different observation angles of the sky, the slope and the intercept can be fit according to the constructed linear relationship model, and thus, the sky hemisphere thermal infrared atmospheric downward radiation is calculated. The complicated calculation of the hemisphere integral is saved, release of a sounding balloon in the field to acquire atmospheric profile data is not needed either, the infrared radiometer is onlyused on the ground to perform three times of measurement in different directions of the sky, the sky hemisphere thermal infrared atmospheric downward radiation data can thus be quickly obtained, materials and financial resources are saved, and a great significance is achieved in ground verification of a thermal infrared surface temperature remote sensing inversion product.

A three-servo device of optical cloud measuring instrument is prepared as arranging closed box body on said device, setting infrared transmission protection window on closed box body, erecting infrared measurement unit and calibration blackbody in closed box body, setting internal pitching motor and external pitching motor as well as orientation motor on said device. Its method for driving relevant mechanism to rotate is also disclosed.

The invention provides a spectral transmittance testing device for a large-caliber collimator, and belongs to the technical field of optical testing. The testing device comprises a standard surface element black body radiation source, a first three-dimensional adjusting table, an infrared radiometer, a second three-dimensional adjusting table, an adjustable supporting frame and a control computer;the standard surface element black body radiation source outputs radiation beams, the radiation beams enter an optical system of the large-caliber collimator of a measured photoelectric parameter measuring device; the infrared radiometer is used for receiving and detecting the emission radiation degree of the collimator, the measured data are processed and analyzed by the control computer to obtain spectral transmittance data; the first three-dimensional adjusting table is used for adjusting the radiation surface of the standard surface element black body radiation source to be perpendicularto the optical axis of the large-caliber collimator in the measured photoelectric parameter measuring device; and the second three-dimensional adjusting table is used for adjusting the infrared radiometer to be parallel to the optical axis of the large-caliber collimator in the measured photoelectric parameter measuring device and to be full of field of vision.

The invention discloses an infrared radiometer applied in a vacuum low-temperature environment. The infrared radiometer comprises an outer calibration source, an optical system, an inner calibration source, a modulation fan, an infrared detector assembly, a pre-broadband amplifier, a lock-in amplifier and a data acquisition processing and control device. The inner calibration source and the outercalibration source are used for calibrating the infrared radiometer; the optical system is used for collecting target light; the modulation fan is placed between the optical system and the infrared detector assembly, modulates detected optical radiation and serves as synchronous input of the lock-in amplifier; the pre-amplifier amplifies an output signal of the infrared detector assembly and outputs the output signal to the lock-in amplifier, and after the output signal is processed by the lock-in amplifier, a signal in direct proportion to an infrared radiation quantity value of a measured target is formed, is collected by the AD and is processed by a computer and software to form a measurement result. In the invention, on-orbit multi-point, high-precision, wide-temperature-range and rapid magnitude traceability or radiation magnitude measurement of the calibration source for on-orbit calibration can be realized.

The embodiment of the invention provides an infrared radiometer response curve calibration device and method. The problem that instrument low-end response calibration can not be well conducted in the prior art is solved. The infrared radiometer response curve calibration device is used for an infrared radiometer. The infrared radiometer comprises a lens barrel. The device comprises a support, a reflector, a black body and a diaphragm. One end of the support is installed on the lens barrel, and the other end of the support is connected with the reflector; the black body is arranged at the portion adjacent to the infrared radiometer; the diaphragm is arranged between the black body and the reflector, and radiation light of the black body is emitted to the reflector through the diaphragm and is reflected through the reflector to enter the lens barrel. By means of the infrared radiometer response curve calibration device and method, instrument low-end response calibration can be achieved, implementation is convenient, and application and popularization are easy.

A three-servo device of optical cloud measuring instrument is prepared as arranging closed box body on said device, setting infrared transmission protection window on closed box body, erecting infrared measurement unit and calibration blackbody in closed box body, setting internal pitching motor and external pitching motor as well as orientation motor on said device. Its method for driving relevant mechanism to rotate is also disclosed.

The invention discloses a three-source portable emissivity tester and a testing method thereof. The three-source portable emissivity tester comprises a cavity, an observed surface feature positioning plate (10) and an infrared radiometer. The top of the cavity consists of three planes at different angles, a 0-degree zenith angle sky downlink radiation incident hole (1), an infrared radiometer observation hole (8) and a 37-degree sky downlink radiation incident hole (5) are formed and respectively provided with hole covers (1, 4 and 7), the observed surface feature positioning plate (10) is provided with a surface feature observation hole (11), a reflector plate is disposed between the observed surface feature positioning plate (10) and the cavity, and a gold-plated circular reflector in the shape the same with the surface feature observation hole (11) is disposed at the center of the reflector plate. In the testing method, 0-degree or 37-degree zenith angle sky downlink radiation and 0-degree and 37-degree zenith angle sky downlink radiations are taken as radiation sources respectively for emissivity measurement, emissivity measurement content is added and measurement precision is high, and the structure of the tester can be adaptable to size of lenses of different infrared radiometers.

The invention provides a target sample generation method based on infrared simulation, and the method comprises the steps: 1, carrying out the modeling of a target region scene, completing the regiondivision and material assignment of the target region scene, and generating a material image of the target region scene; 2, constructing a three-dimensional scene of the target area scene according tothe material image, the model of the target area scene and the elevation data of the target area scene; 3, setting external environment conditions of the target area scene, and performing temperaturefield calculation, infrared radiation calculation and atmospheric transmissivity calculation of the target area scene to generate an infrared simulation scene under a zero visual range of the targetarea scene; and 4, generating an infrared simulation target sample according to the viewpoint parameter and the imager parameter on the basis of the infrared simulation scene of the target area scene.By applying the technical scheme provided by the invention, the technical problems of low reliability of heterologous matching identification of the infrared target and difficulty in adapting to various external environments in the prior art are solved.

The invention provides a method for increasing the signal-to-noise ratio of an infrared radiometer by using an internal temperature control technology. An optical system, a light filter, a field-of-view light barrier, a chopper, an ellipsoid reflector, a low background source and an infrared detector which constitute an infrared radiometer are encapsulated in a sealed chamber, a semiconductor cooler is mounted and fixed on the inner wall of the sealed chamber, and a temperature measuring platinum resistor is installed on one side of the infrared detector in the sealed chamber. A temperature controller is installed on the wall surface of the sealed chamber. The semiconductor cooler is connected with the temperature measuring platinum resistor and the temperature controller. The temperaturemeasuring platinum resistor collects the temperature of the space around the infrared detector in real time and feeds back the temperature to the temperature controller. The temperature controller makes the semiconductor cooler adjust the internal temperature of the infrared radiometer so as to keep the internal temperature of the infrared radiometer at a set temperature and increase the signal-to-noise ratio of the infrared radiometer. The problem of stray signal change caused by heating of components in a system can be solved by controlling the internal temperature of the system.

The invention discloses a continuous-focusing reflex infrared radiometer incidence lens. A guide rail is arranged on the inner wall of a lens cone. An aspheric primary mirror is arranged inside the lens cone. The edge of the aspheric primary mirror matches the guide rail. The aspheric primary mirror can linearly slide along the guide rail. A secondary mirror is arranged behind the aspheric primary mirror inside the lens cone. The middle of the aspheric primary mirror is provided with a through hole which is in the same axis as the secondary mirror. A focusing mechanism not covering the through hole is arranged on the aspheric primary mirror, and the aspheric primary mirror is dragged by the focusing mechanism to linearly slide inside the lens cone. By dragging the aspheric primary mirror through the focusing mechanism to linearly slide forward or backward inside the lens cone, the distance between the primary and secondary mirrors is changed, and simple, flexible and highly stable lens focusing is realized. Compared with the prior art, there is no need to rotate the aspheric primary mirror, asymmetry error produced in the process of rotation is avoided, the whole structure is easy to operate and assemble and is of high stability, and a good focusing effect is achieved.

The invention discloses a non-contact land-surface-temperature measurement instrument and method. The measurement instrument comprises an assembly support, an infrared radiometer and a four-componentnet radiometer; the assembly support is composed of a supporting base, a vertical arm and an extending arm; the supporting base is a foldable tripod and is fixedly arranged at the bottom end of the vertical arm; the extending arm is perpendicularly arranged at the upper end of the vertical arm; a solar cell panel and a central control box are fixedly arranged on the vertical arm through device clamping buckles, and the infrared radiometer and the four-component net radiometer are fixedly arranged on the extending arm through device clamping buckles; the infrared radiometer is installed at theside end of the extending arm, and perpendicularly-downward observation of a zenith angle of 180 degrees can be conveniently conducted. According to the non-contact land-surface-temperature measurement instrument and method, the measurement accuracy of atmospheric downward radiance can be guaranteed, and the accuracy of following land-surface temperature measurement is thus improved. In addition,the influence of the spectrum heterogeneity of a wide-channel land-surface emissivity spectrum on land-surface-temperature estimation can be effectively avoided, and non-contact accurate measurement of the land-surface temperature is achieved.

The invention discloses a temperature sensor installation method for an infrared radiometer in a vacuum low-temperature environment. The method comprises the steps: enabling a temperature sensor and ametal indium powder to be placed in an installation hole of an external calibration source radiation plate at the same time, carrying out heating to enable the metal indium powder to be melted, and achieving connection of the temperature sensor and the radiation plate through solidified metal indium after the metal indium powder is cooled. In the invention, the temperature sensor and the externalcalibration source radiation plate are tightly and perfectly coupled so that the temperature control system can reliably measure and control the temperature of the external calibration source throughthe temperature sensor.

The invention relates to a vacuum infrared calibration radiation response consistency method. Aiming at the problem of inaccurate acquisition of a calibration coefficient and a platinum resistance conversion coefficient of each channel of an infrared radiometer caused by lens pollution, non-uniformity of temperature of a detection head and the like in a vacuum infrared calibration process, surface source black body and on-satellite black body temperature change data obtained in infrared calibration are utilized; the responsivity of the calibration state in the vacuum infrared calibration process of the infrared radiometer is subjected to radiation consistency processing, so that the radiation accuracy in the process of transmitting the radiation from the space radiation reference to the on-satellite black body is ensured; According to the vacuum infrared calibration radiation response consistency method, an infrared channel radiation calibration response consistency model is established based on an infrared radiometer linear response system, infrared radiometer single system state response stability and space radiation reference source radiation stability, infrared radiometer radiation calibration data reprocessing is realized, and the vacuum infrared radiation calibration precision is effectively improved.

Disclosed is a portable thermal infrared load field calibration and water surface temperature verification system device. A floating device is composed of a polyethylene-aluminum composite pipeline, a hard plastic tube, a basketball and a right-angle tee connector. A measuring instrument carrying platform is arranged on the top of the floating device, and an infrared radiometer KT15, a data acquisition unit and a storage battery are arranged on the platform in a carrying mode. The bottom of the carrying platform and the KT15 are wrapped by silver paper, so that the influence of infrared radiation of a measuring table itself on the observed result is reduced. By the adoption of the device, automatic observation can be achieved outdoors, long-term observation data can be stored, and the device can be placed on the water surface for measuring; the collected radiation temperature data and synchronous sounding data are simultaneously input to a radiometric calibration module which is developed in a matched mode, and the calibration coefficient can be calculated to be used for radiometric calibration of a thermal infrared sensor; meanwhile, in times of water surface measurement, due to the fact that the radiation temperature measured by the KT15 represents the water body radiation value of certain area, the water surface temperature on behalf of a certain area range can be calculated by the way of combining a matched temperature verification module, and the temperature verification module is used for verifying the remote sensing retrieval surface temperature.

The invention provides an environmental thermal infrared irradiance measuring device and a measuring method thereof. The measuring device includes a matte gold plated cover plate, thermocouple placing grooves, thermocouple sensors, a water container, a main engine of a thermocouple temperature measuring instrument, and a thermal infrared radiometer, wherein the thermocouple placing grooves are milled and formed in the lower surface of the matte gold plated cover plate, and are provided with downward openings; the thermocouple sensors are placed in the thermocouple placing grooves; the matte gold plated cover plate is arranged at the top of the water container; the top ends of the thermocouple placing grooves are lower than the upper edge of the water container; and the thermocouple sensors are electrically connected with the thermocouple temperature measuring instrument. The measuring method includes the steps of: collecting and calculating the black-body radiation on the upper surface of the matte gold plated cover plate through thermocouples; measuring the emergent radiancy of the matte gold plated cover plate through the infrared radiometer; and obtaining the sky thermal infrared downlink radiation or the environmental thermal infrared irradiance via the conversion formula. The device is the only device for directly measuring the sky hemisphere integral downlink radiation, and the precision in temperature measurement for the outer surface of the naked matte gold plated cover plate is greatly improved.

The invention discloses an active / passive diffusion type real-time spectrum emissivity tester and a use method thereof. The tester comprises a dual-face gold-plated main body chamber, a block-like electro-thermal assembly, a 102F Fourier expansion spectrometer, an infrared radiation meter and a real-time data transmission calculation displaying device, wherein the block-like electro-thermal assembly is arranged on the dual-face gold-plated main body chamber, the block-like electro-thermal assembly and the dual-face gold-plated main body chamber are arranged on a supporting board observation hole to form a diffusion type radiation source for an observation object under the main body chamber, one side of the main body chamber has a 45-DEG observation cylinder which is connected with the infrared radiation meter or the 102F Fourier expansion spectrometer, observation data is transmitted to the real-time data transmission calculation displaying device, an 8-14-micrometer average emissivity of a tested object or an emissivity curve changing along with spectrums are acquired through calculation, and real-time correction can be carried out by employing a time-delay temperature increasing / decreasing equation. The active / passive diffusion type real-time spectrum emissivity tester can rapidly test the average emissivity of thermal infrared wave bands and the distribution curve of the emissivity changing along with the spectrums in real time, and measurement precision is improved.

The present invention disclosed a method of combustion furnace based on temperature distribution. According to the same temperature conditions, the detector is like the target infrared radiation calculation rate received by the detector to determine the combustion efficiency in combination with the flame form;The temperature field analyzes the operating efficiency of heating furnace according to the uniformity of the temperature distribution of the horizontal space and the change of the vertical temperature gradient change, and monitor the operating status of the heating furnace.The method provided by the present invention can effectively solve the technical problem of online detection of the combustion of the heating furnace and the operating status of the device.

The invention discloses a target infrared integral radiation intensity test method and device based on a thermal infrared imager. The device comprises the thermal infrared imager, an infrared filter,a laser range finder and a data acquisition computer. The method includes the steps of selecting the infrared filter and mounting the infrared filter on the thermal infrared imager according to the test waveband requirement of the target integral radiation intensity; adjusting the distance between the thermal infrared imager and a measured target; adjusting the focal length of a lens of the thermal infrared imager, setting target emissivity parameters, selecting a target area in an observation window of the thermal infrared imager, determining the pixel range occupied by the target, collectingthe apparent temperature distribution of the measured target through a computer; measuring the distance between the target and the thermal infrared imager; calculating the atmospheric transmissivityunder the measurement distance; and calculating the infrared integral radiation intensity of the measured target. Measurement of the infrared integral radiation intensity is not limited by an infraredradiometer and other integral radiation measuring instruments any more. The method and the device have the advantages of being low in measurement cost, high in test precision, wide in application prospect and the like.

The invention provides an infrared radiometer for a vacuum low-temperature environment, which comprises a vacuum cold cabin, and a stray light eliminating light shield, a primary mirror, a vacuum chopper, a field diaphragm, a secondary mirror and a refrigeration type infrared detector sequentially arranged on a platform in the cabin according to a light path propagation direction. Equipment to be calibrated is arranged on the side wall of the vacuum cold cabin through a flange and is aligned with the stray light eliminating light shield; and a liquid nitrogen inlet pipeline and a nitrogen outlet pipeline are arranged on a Dewar bottle cap of the refrigeration type infrared detector and are respectively communicated with a liquid nitrogen inlet pipeline and a nitrogen outlet pipeline on a flange plate of the vacuum cold cabin. The vacuum cold cabin is adopted to simulate a vacuum low-temperature environment, the refrigeration type infrared detector is adopted to detect an ultra-weak infrared radiation signal, the ultra-weak wide temperature range infrared radiation of 200K-400K can be measured, and an effective guarantee can be provided for infrared load performance test equipment.

The invention discloses an infrared surface temperature observation system and an observation method thereof. The system comprises a core processor, an information acquisition module, a data output module, a power supply module and a storage module, wherein the information acquisition module comprises a laser ranging module, an infrared temperature measurement module and an image acquisition module; and the data output module comprises a wireless module, a serial port output module, a state indication module and a real-time clock chip. Compared with a platinum resistor temperature sensor used in weather at present, the infrared surface temperature observation system provided by the invention calculates the surface temperature by using infrared radiation emitted by the surface, does not directly contact with the surface, does not affect the surface temperature field distribution, has more representative measured values and higher accuracy, and the system corrects influence factors in the infrared temperature measurement process, so that the temperature value output by the system is more accurate, and high requirements of weather services are met.

The invention discloses an infrared radiometer applied in a vacuum and low temperature environment, comprising an external calibration source, an optical system, an internal calibration source, a modulation fan, an infrared detector assembly, a pre-broadband amplifier, a lock-in amplifier, data acquisition processing and control device. The internal calibration source and the external calibration source are used for calibration of the infrared radiometer; the optical system is used to collect target light; the modulation fan is placed between the optical system and the infrared detector assembly, and the measured light radiation Modulate as the synchronous input of the lock-in amplifier; the preamplifier amplifies the output signal of the infrared detector component and outputs it to the lock-in amplifier, and after the lock-in amplifier processes it, it forms a The signal is collected by AD and processed by computer and software to form the measurement result. The invention can realize on-orbit multi-point, high-precision, wide temperature range, rapid value traceability or radiation value measurement of the calibration source used for on-orbit calibration.

The invention discloses an external calibration source for an infrared radiometer in a vacuum low-temperature environment and a temperature control system of the external calibration source. The external calibration source is a square surface type black body and comprises a radiant panel (201), a heating and refrigerating device (202), a heat balance plate (203) and a radiator (204) which are sequentially and tightly contacted and fastened together through a supporting structure (205). The temperature control system comprises a calibration source controller, a power output device and a temperature sensor. A temperature sensor collects the temperature of the external calibration source in real time and feeds back the temperature to the calibration source controller in real time, and the calibration source controller compares a measured value of the temperature of the external calibration source with a set value, outputs a control signal and drives the power output device to output powerso that the power of the heating and refrigerating device of the external calibration source is adjusted. The system can be calibrated on line in real time, and measurement accuracy is ensured.