External calibration source for infrared radiometer in vacuum low-temperature environment and temperature control system

Abstract

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.

Description

technical field [0001] The invention belongs to the technical field of infrared radiation measurement, calibration and calibration, and in particular relates to an external calibration source for an infrared radiometer in a vacuum and low temperature environment and a temperature control system thereof. Background technique [0002] At present, with the development of technology, the application of infrared imagers has been extended to near space and outer space. These systems include space infrared observation system, near space detection system, and spaceborne infrared remote sensing system. With the technical and tactical performance of these infrared load With the gradual increase in requirements, high-precision quantitative detection has become an inevitable trend for the further development of infrared loads. [0003] Radiation parameter calibration is the basis and prerequisite for quantitative detection of infrared loads. Through radiation parameter calibration, the ...

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Problems solved by technology

[0008] Traditional on-orbit radiation parameter calibration has few calibration points, generally one or two-point calibration, and the calibration temperature range is narrow, which cannot meet the current infrared load calibration and calibration requirements of on-orbit radiation parameters, and requires a new high-performance calibration source. , if the calibration source is not traceable and transferred, its value cannot be guaranteed to be accurate, and high-precision on-orbit calibration cannot be achieved. Therefore, in order to ensure the accurate traceability of the calibration source, high-precision traceability and Calibration, which requires the use of an infrared radiometer in a vacuum and low temperature environment, as a value transfer and infrared radiation value measurement device, to ensure the traceability of the value and the accuracy of the value measurement, while the external calibration source is the infrared radiometer to achieve calibration. Key components for marking and target infrared radiation measurement

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