本文選題：雙光路探測 + 目標識別　； 參考：《西安工業(yè)大學》2015年碩士論文

【摘要】：激光因具有很好的單色性、相干性以及抗電磁干擾等優(yōu)點,被廣泛應用于武器系統(tǒng)的目標指示、目標探測識別等。然而,云、薄霧、雨、雪等懸浮粒子對激光信號具有散射和衰減作用。當激光脈沖通過直徑較大的雨滴時,會隨機伴隨著嚴重的后向散射,這將會被誤判為目標的回波信號。本論文針對降雨環(huán)境下系統(tǒng)的誤觸發(fā)問題,研究激光探測系統(tǒng)在降雨中的目標識別方法,對擴展激光探測系統(tǒng)的應用范圍有一定的參考價值。論文根據(jù)雨滴的物理特征以及激光在雨中傳輸?shù)乃p、散射特性,推導了激光在降雨環(huán)境下的傳輸模型。分析雨滴作用于光電探測系統(tǒng)輸出信號特點,以及雨滴信號與目標信號同時作用探測系統(tǒng)時的差異。利用雨滴和目標同時作用于探測區(qū)域的差異提取降雨環(huán)境下的目標特征,建立目標識別算法,給出復雜環(huán)境目標光電探測目標識別的設計方法-雙光路光電探測識別方法。依據(jù)雙光路探測方法完成相應的電路設計,并最終完成光電探測系統(tǒng)。根據(jù)雙光路探測方法,完成光電探測系統(tǒng)試驗平臺的搭建并進行相關試驗測試,對無降雨環(huán)境不同距離下目標探測識別試驗和降雨環(huán)境近紅外波段激光多組距離單／雙光路目標探測識別試驗的結果分析,得出雙光路探測目標識別方法可以消除由環(huán)境因素引起的干擾。
[Abstract]:Because of its good monochromatic, coherence and anti-electromagnetic interference, laser is widely used in target indication, target detection and recognition of weapon systems.However, suspended particles such as clouds, mist, rain and snow can scatter and attenuate laser signals.When a laser pulse passes through a large raindrop, it will be accompanied by severe backscattering at random, which will be misjudged as the echo signal of the target.In this paper, the target recognition method of laser detection system in rainfall environment is studied, which has some reference value for extending the application range of laser detection system.According to the physical characteristics of raindrops and the attenuation and scattering characteristics of laser propagation in rain, the model of laser propagation in rainfall environment is derived.The characteristics of the output signal of the photoelectric detection system acting on the raindrop and the difference between the raindrop signal and the target signal acting simultaneously on the detection system are analyzed.Using the difference of raindrop and target acting on the detecting area simultaneously to extract the target characteristics in rainfall environment, the target recognition algorithm is established, and the design method of photoelectric detection target recognition in complex environment is presented, which is called double optical path photoelectric detection recognition method.The circuit design is completed according to the method of double optical path detection, and the photoelectric detection system is finally completed.According to the method of double optical path detection, the test platform of photoelectric detection system is built and the related test and test are carried out.The results of target detection and identification experiments in different distances in rainfall environment and in near-infrared laser band in rainfall environment with single / double optical path are analyzed.It is concluded that the dual optical path detection method can eliminate the interference caused by environmental factors.
【學位授予單位】：西安工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TJ5;TN249

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本文編號：1739830