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《Chinese Journal of Lasers》 2014-11
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Vehicle Identification Technology of Laser Heterodyne Spectral Analysis of Vibration Characteristics

Luo Yun;Feng Guoying;Liu Jian;Zhou Shengyang;Zhou Shouhuan;Institute of Laser &Micro/Nano Engineering,Sichuan University;North China Research Institute of Electro-Optics;  
Combinating of mechanical vibration theory equations,preliminarily the theoretical vibration response curve of structure of the quarter of 3°freedom car body with different parameters is analyzed.Using laser heterodyne techniques,an experimental measurement program for vehicle vibration information is designed and built.Against the case that two vehicles of similar appearance,engine output consistent,the vibration information and time domain vibration spectral analysis are experimentally measured.By analyzing the vibration signal time domain,and frequency spectral curves measured,the frequency feature points of the two vehicles are found successfully.The two cars are marked and distincted well,and the blind of video imaging vehicle models identification method is made up.The relevant work provides a preliminary theoretical and experimental basis for the vehicle identification technology based on laser detecting the vibration signals.
【Fund】: 国家自然科学基金(60890203 10676023)
【CateGory Index】: U495
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