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Luoyang, China

Yi Y.,No 63892 Unit of PLA | Yi Y.,PLA Second Artillery Engineering University | Yao M.,No 63892 Unit of PLA | Wu J.,No 63892 Unit of PLA | Yue K.,Xian Jiaotong University
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | Year: 2014

In recent infrared warning experiments, an abnormal phenomena was discovered in which the target radiance increased with the active range. In this paper, how to solve the problem was discussed. Based on the theory of radiance detection equation and by the atmospheric radiance software LOWTRAN, a particular analysis was given about the factors affecting the infrared warning such as the infrared radiant characteristics of the target, the atmospheric irradiancy of the sky background, the irradiancy and the transmittance of the atmospheric path, the detection range, the effective area of the target facing the detector, and the principle. As a result, with the active range increased, the increment of the background radiance was dominant in all influenced factors, so the target radiance was larger and larger. Through the discussion, the abnormal phenomena were interpreted reasonably, and the conclusion was of great significance to develop the algorithm of target extraction for the infrared detective and tracking systems. Source


Yi Y.,No 63892 Unit of PLA | Yi Y.,PLA Second Artillery Engineering University | Yue K.,Xian Jiaotong University | Wu J.,No 63892 Unit of PLA | Yao M.,No 63892 Unit of PLA
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | Year: 2013

The effective field was introduced to resolve the difference between point and surface target during infrared warning detection. The effective voltage signal equation of target detection was deduced. Based on the representation formula, a new physical quantity named detectability which was used to describe the degree of target detection difficulty was defined in this paper. For the new parameter was relative to target characteristic, environment factor and the max field of unit pixel, the equivalent test was transformed into equivalent detectabilty test. According to the conditions of development and test range, in the basis of equivalent detectabilty, a method to test the active distance of an infrared warning device equivalently was proposed, then an practical example was given. Source

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