基于激光三角法和嵌入式的微位移实时检测系统

基于激光三角法和嵌入式的微位移实时检测技术,采用激光三角法测距和灰度重心法提取激光条纹中心的原理,使线结构光、透镜、CCD位置信息满足Scheimpflug共轭清晰成像条件。通过图像处理获取像面坐标系位移信息,得到待测物体物面坐标系的位移,利用灰度重心法实时提取结构光条纹中心的特点,结合嵌入式系统尺寸小、稳定、便携的特性,实现对待测物体进行实时、非接触和微位移测量。

Real-time Micro-displacement Detection System Based on Laser Triangulation and Embedded System

Based on the laser triangulation method and embedded micro-displacement real-time detection technology,the principle of laser triangulation ranging and gray center of gravity method to extract laser fringe center are introduced.The position information of line structured light,lens and CCD can satisfy the condition of Scheimpflug conjugate clear imaging.The displacement information of image plane coordinate system is obtained by image processing,and then the displacement of object surface coordinate system is obtained.The real-time feature of structured light fringe center is extracted by gray centroid method,with the small size,stability and portability of the embedded system,the whole measurement system can realize real-time,non-contact and micro-displacement measurement of the measured object.