Abstract
Aiming at the problem wherein temperature inversion accuracy is unstable due to the major differences in atmospheric transmittance under various observation paths, a method for measuring radiation characteristics of an aircraft engine’s hot parts and skin using a cooled middle-wave infrared camera is proposed. Based on the analysis of the aircraft’s infrared radiation characteristics, the atmospheric transmission model of any observation path was revised, the absolute radiation correction model was established, and the temperature inversion equation was calculated. Then, we used the quasi-Newton method to calculate the skin temperature and discussed uncertainty sources. After the theoretical study, an outfield test was carried out. A middle-wave infrared camera with a wavelength of 3.7–4.8 μm was applied to the actual experimental observation of the turbofan civil aviation aircraft. The ground observation distance was 15 km, and the flying height was 3 km. When implementing temperature inversion with the method presented in this paper, the surface temperature of the aircraft engine hot parts was 381 K, the correction uncertainty was ±10 K, the surface temperature of the skin was 296 K, and the correction uncertainty was ±6 K. As the experiment showed, the method in this paper can effectively implement infrared target temperature inversion and provide a reference for the quantification of infrared data.
Subject
Electrical and Electronic Engineering,Industrial and Manufacturing Engineering,Control and Optimization,Mechanical Engineering,Computer Science (miscellaneous),Control and Systems Engineering
Reference37 articles.
1. Correlation between infrared radiation characteristic signals and target maneuvering modes;Kou;Acta Opt. Sin.,2018
2. Discussion on the infrared stealthy technique of aircraft;Du;Electron. Warf.,2010
3. Detecting and tracking technology about IR stealth target;Wang;Infrared Laser Eng.,2006
4. A review of false alarm suppression technology for infrared early warning satellite;Li;Infrared Technol.,2020
5. Calculation method for airplane IR radiation and atmospheric transmittance;Mao;J. Beijing Univ. Aeronaut. Astronaut.,2009
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