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.

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 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.

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 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.

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 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.