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。
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.
出处
《中国测试》
CAS
2011年第1期63-65,共3页
China Measurement & Test
