Control system applicable to wide temperature ranges of surface source black bodies under vacuum condition

Abstract

The invention discloses a control system applicable to wide temperature ranges of surface source black bodies under a vacuum condition. The control system comprises a temperature control instrument, a program-controlled power supply, a temperature sensor, a refrigerating plant, a heating sheet and a surface source black body radiation source; the heating sheet and the temperature control instrument are respectively arranged on the surface source black body radiation source, a first control signal output end of the temperature control instrument is connected with the heating sheet by the program-controlled power supply, a second control signal output end of the temperature control instrument is connected with a control end of the refrigerating plant, and the refrigerating plant is connected with the surface source black body radiation source; the temperature sensor is connected with a signal input end of the temperature control instrument. The control system has the advantages that the temperature control ranges of the surface source black bodies can be effectively expanded by the aid of the control system, particularly, a control temperature lower limit of each surface source black body can reach 190K owing to a refrigerating mode, and a vacuum low-temperature infrared radiation standard source can be vividly simulated.

Description

technical field [0001] The invention belongs to the field of performance calibration equipment for space-borne infrared imagers, and relates to a wide temperature range control system for source black bodies under vacuum conditions. The system can effectively improve the temperature control range of surface source black bodies, especially the cooling method, which can The lower limit of surface source black body control temperature reaches 190K, which can realistically simulate the vacuum low temperature infrared radiation standard source. Background technique [0002] The remote sensing data sent back by the infrared remote sensing detector carried on the space vehicle is an electrical signal formed after the photoelectric conversion of the remote sensor. In order to invert the electrical signal into the radiation of the object, it is necessary to calibrate the infrared channel before the satellite is launched. . The level of calibration accuracy directly affects the accur...

AI Technical Summary

Problems solved by technology

[0005] Although the existing temperature control system has improved the temperature range and accuracy of the surface source blackbody, its system structure is complex, and none of them can meet the current demand for wide temperature control range.

Images