Ultra-large-area infrared radiation target board for infrared radiation external field test

Abstract

The invention provides an ultra-large-area infrared radiation target board for an infrared radiation external field test. The ultra-large-area infrared radiation target board comprises a radiation surface structure, a heating system, a temperature measuring system, a temperature control system and a sealed heat preservation system; the radiation surface structure comprises a radiation surface body, a connecting mechanism and a stabilizing and supporting mechanism; the radiation surface body is an infrared radiation surface body of which the size is 1.5 m*1.5 m and the temperature range is ambient temperature <+>5-150DEG C and formed by longitudinally splicing three sub-radiation surfaces. The target board can serve as a large-area standard infrared radiation source with uniform temperature, and is mainly applied to long-distance external field standardization and calibration of infrared radiation measuring instruments such as infrared radiometer, thermal imager and infrared radiation temperature measuring instrument, and is also applied to the atmospheric transmittance measurement of wild infrared bands by serving as standard and stable infrared radiation standard.

Description

technical field [0001] The invention belongs to the field of optical radiation measurement, in particular to a super large-area infrared radiation target plate used for infrared radiation field testing. Background technique [0002] Infrared radiation calibration mostly adopts black body radiation source, but for infrared radiation field test, such as calibration and calibration of infrared radiation measuring instrument in the field environment, because the distance between the tested object and the measuring instrument is relatively far, and the radiation area of ​​the black body radiation source is relatively small. Small (currently the largest surface source blackbody on the market has an effective radiation surface of no more than 0.4m), resulting in a small proportion of the image formed by the blackbody radiation source in the infrared radiation measuring instrument during calibration, almost a point, entering the infrared radiation measuring instrument Most of the in...

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Problems solved by technology

[0002] Infrared radiation calibration mostly adopts black body radiation source, but for infrared radiation field test, such as calibration and calibration of infrared radiation measuring instrument in the field environment, because the distance between the tested object and the measuring instrument is relatively far, and the radiation area of ​​the black body radiation source is relatively small. Small (currently the largest surface source blackbody on the market has an effective radiation surface of no more than 0.4m), resulting in a small proportion of the image formed by the blackbody radiation source in the infrared radiation measuring instrument during calibration, almost a point, entering the infrared radiation measuring instrument Most of the infrared radiation comes from the background radiation, and due to the randomness and instability of the background, the calibration of the infrared radiation measuring instrument will be inaccurate, which will affect the measurement results of the infrared radiation characteristics.

[0003] In addition, due to the small radiation area and low radiation power of the black body radiation source, when calibrating the infrared radiation measuring instrument, only the radiation power / voltage response curve in the lower response range can be calibrated. When testing, there will be very serious errors, and the accuracy of the measurement results cannot be guaranteed at all

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