作者：陈金令1, 宿丁2, 魏学明1, 邓林明1, 缪康1
作者单位：1. 四川长虹电子科技有限公司, 四川 绵阳 621000;
2. 西南电子设备研究所, 四川 成都 610036
关键词：激光雷达; 二维扫描; 直接探测; 回波信号; 边缘检测
摘要：
利用激光回波信号的强度变化来测量物体边缘轮廓的新型激光雷达, 并利用二维扫描、直接探测等技术建立了一套激光扫描实验系统。振镜在X、Y方向分别以不同的频率振动, 当激光经过振镜反射后, 就以X、Y方向进行二维扫描, 激光二极管接收到的信号经过滤波后被分为两个不同频率的信号, 分析这两个不同频率的信号, 就可以得到物体的轮廓信息。实验测量表明, 通过测量回波强度变化来测量物体边缘轮廓的方案是可行的。
Analysis for signal of the Laser rapid scanning experiments
CHEN Jin-ling1, SU Ding2, WEI Xue-ming1, DENG Lin-ming1, MIAO Kang1
1. Changhong Electric Co. Ltd., Mianyang 621000, China;
2. Southwest Institute of Electronic Equipment, Chengdu 610036, China
Abstract: This paper presented a new laser radar that measures the profile of the target by detecting the change of returned laser energy. With 2-D scanning and direct detection technology, a rapid-scanning laser system was established. The system steers a mirror to oscillate in X and Y direction at different frequency, so the laser beam dither in two directions and scan the surface of target. The energy of the laser reflected from the target was detected by PIN. After filtration, the detected energy could be separated to the first and second dither frequency for each channel, thus the profile message of the target can be obtained. The experimental results prove that the proposed approach is effective for profile detection of the target.
Keywords: laser radar; 2-D scanning; direct detection; echo signal; edge detection
2011, 37(1): 63-65 收稿日期: 2009-12-28;收到修改稿日期: 2010-3-9
基金项目:
作者简介: 陈金令(1975-),男,河南平顶山市人,高级工程师,博士,主要从事信号处理方面的研究。
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