基于PTZ相机的激光远程除冰视觉测距技术研究

Research on Laser Remote Deicing Vision Range Technology Based on PTZ Camera

摘要:

介绍了一种基于PTZ（Pan/Tilt/Zoom）相机的测量范围可调的激光三角测距新方法，利用VS2015和OpenCV，设计实现了针对大型户外目标的激光远程除冰视觉测距系统，通过自行开发的软件进行相机云台PTZ运动控制及激光光斑识别定位，并借助PTZ相机水平360 °全角度旋转、垂直90 °翻转及23倍光学变倍能力，实现了40 m范围内不同位置目标的距离测量。测距实验结果表明，系统测量误差在Zoom=3倍时不大于54 mm，在Zoom=5倍时不大于27mm，在Zoom=10倍时不大于19 mm，在Zoom=15倍时不大于15 mm，在Zoom=20倍时不大于11 mm，测量误差随测量距离的增大而增大、随镜头变倍值的增大而减小。

Abstract:

A new method of laser triangulation based on PTZ camera was introduced. A laser remote deicing vision ranging system for large outdoor targets was designed and implemented using VS2015 and OpenCV. In order to make up for the limitations of ordinary laser rangefinders, such as limited range and poor flexibility, a laser ranging method with adjustable measurement range was proposed by combining the rotation and zoom advantages of PTZ camera. Through the PTZ controlling and spot recognition and positioning, and with the help of PTZ camera 360° full-angle rotation, vertical 90° flip and 23 times optical zoom capability, the distance measurement of targets at different positions within 40 m was realized. The experimental results show that the measurement error of the system is no more than 54 mm when the Zoom=3 times, no more than 27 mm when the Zoom=5 times, no more than 19 mm when the Zoom=10 times, no more than 15 mm when the Zoom=15 times, no more than 11 mm when the Zoom=20 times. The measurement error increases with the increasement of the distance and decreases with the increasement of the Zoom value.