Surface source black body temperature control structure with high temperature uniformity
A surface source black body, uniformity technology, applied in the fields of radiation measurement and infrared camera imaging, can solve problems such as poor temperature adjustment ability, achieve the effect of strong temperature control ability, reduce heat transfer temperature difference, and good size expansion
Inactive Publication Date: 2021-06-22
BEIJING INST OF SPACECRAFT SYST ENG
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Problems solved by technology
The semiconductor thermoelectric cooler (TEC) controls the temperature by changing the direction of its input voltage and controlling the heating and cooling state of the semiconductor thermoelectric cooler (TEC) to realize the temperature rise and drop adjustment of the surface source black body, but limited by the cooling efficiency of the semiconductor cooler, its temperature Poor adjustment ability
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[0026] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0027] The invention provides a surface source blackbody temperature control structure with high temperature uniformity.
[0028] Such as Figure 1 ~ Figure 3 As shown, the surface source blackbody is composed of a blackbody radiation cover 2 and a backplane 3, and the size of the surface source blackbody is 520mm×520mm.
[0029] Micro-channels can effectively enhance the flow boiling heat exchange between the two-phase working fluid and the surface source blackbody. According to the flow resistance characteristics of the working fluid R134a, in order to reasonably control the pressure difference between the surface source blackbody inlet and outlet, the back of the blackbody radiation cover 2 is engraved with 38 grooves. Parallel and evenly distributed micro channels 7, the groove depth is 1.5 mm, and the width is 6 mm.
[0030] The black body radiation...
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The invention discloses a surface source black body temperature control structure with high temperature uniformity. According to the surface source black body structure, a black body and a temperature control cold plate are integrally designed, a two-phase working medium flow channel is designed in the black body, and the two-phase working medium in the flow channel directly acts on the black body, so that the contact thermal resistance between the temperature control cold plate and the black body is eliminated, and the heat exchange temperature difference between the two-phase working medium and the black body is effectively reduced; and the temperature adjusting capability of the two-phase working medium on the black body surface is enhanced. The two-phase working medium flow channel is formed by connecting a plurality of parallel micro channels in parallel and is uniformly distributed in the black body, so that the two-phase working medium is uniformly distributed in the black body, the two-phase working medium flows and boils in the black body, the heat exchange coefficient is higher than that of a single-phase loop by one order of magnitude, the temperature control capability is high, the temperature control range is large, the stability is good, and the precision is high. Meanwhile, the surface temperature of the black body is measured through embedded contact type temperature measurement, environmental interference is avoided, and the temperature measurement precision is high.
Description
technical field [0001] The invention relates to the technical fields of infrared camera imaging and radiation measurement, in particular to a surface source blackbody temperature control structure with high temperature uniformity. Background technique [0002] With the rapid development of infrared technology, infrared temperature measurement and detection, infrared remote sensing, etc. have been more and more widely used. , The resolution puts forward very high requirements. The surface source blackbody is the key equipment for infrared calibration of infrared remote sensing detectors. Through the combination of surface source blackbody and infrared optical instruments, the test of the optical system, detector and signal processing of infrared imaging equipment and the objective testing of the whole machine can be realized. Evaluation, the application requirements of surface source black body are more and more extensive. At present, the radiation aperture of the surface s...
Claims
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IPC IPC(8): G01J5/20
CPCG01J5/20
Inventor 杨昌鹏徐侃薛亮于新刚刘书峰童叶龙孟繁孔余雷黄兴李挺豪
Owner BEIJING INST OF SPACECRAFT SYST ENG
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