Thermal barrier tester of infrared imaging device

Abstract

The invention discloses a thermal barrier tester of an infrared imaging device, which comprises an incubator, wherein an inner cavity of the incubator is provided with a thermal insulation layer; the thermal insulation layer divides the incubator into a low-temperature region and a high-temperature region; the wall surface of the thermal insulation layer is provided with a fairing fixture, and is used for fixing an optical fairing in the infrared imaging device; an inner cavity of the low-temperature region is internally provided with a mounting rack of the infrared imaging device, and is used for fixing components except for the optical fairing in the infrared imaging device; and the incubator wall of the incubator at the side of the high-temperature region is provided with an observation window which is corresponding to the part of the fairing fixture and acts as a cameral shooting channel of the infrared imaging device. The thermal barrier tester of the infrared imaging device simulates different temperatures of the outer surface of the optical fairing and a cabin of the infrared imaging device by utilizing the high-temperature region and the low-temperature region of the incubator so as to verify the attenuation characteristic of the imaging quality of the infrared imaging device under the thermal barrier condition, the temperature of the optical fairing in the verifying process can be ensured to be constant, the test data is accurate, also the scalding hazard does not exist, and the operation is safe.

Description

technical field [0001] The invention relates to infrared imager test equipment, in particular to an infrared imager thermal barrier test device. Background technique [0002] During the high-speed flight of the infrared imager, due to the influence of the aerodynamic heating of the atmosphere, the optical dome itself will generate infrared radiation, and the thermal clutter of the optical dome will enter the field of view and cause attenuation of the imaging quality, reducing the signal-to-noise ratio of the imaging system , so that the imaging is blurred, and even forms a thermal barrier effect and cannot be imaged in severe cases. [0003] In order to verify the attenuation characteristics of the thermal barrier effect on the imaging quality of the infrared imager, there are two verification methods usually used: one is to use wind tunnel test, and the other is to use single temperature box heating. The wind tunnel test method is generally to use the arc wind tunnel to si...

AI Technical Summary

Problems solved by technology

Since the temperature of the heated optical dome is as high as 100°C, there is a potential safety hazard of scalding the operator during operation

In addition, during the process of taking the optical dome out of the high-temperature box and placing it in front of the infrared imager, the temperature of the optical dome will change, that is, the temperature of the optical dome cannot be controlled during the test process, and accurate test data cannot be obtained

Therefore, the above two test methods are unable to meet the needs of infrared imager thermal barrier test

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