摘要
为了简化传统的视觉检测中对测量系统进行的复杂重复标定过程,将激光测量应用到视觉检测中,结合激光测距获得的距离参数与光斑图像检测得到的相关参数,进行精密尺寸测量。为进一步提高测量精度,以椭圆最小二乘拟合法为基础,提出了一种检测光斑中心距的亚像素级定位算法。根据该测量方法设计了尺寸测量系统,进行了若干测量精度实验。结果表明,该方法对目标尺寸测量的相对精度优于0.1%,满足工业化需求,亦可推广至对动态目标的位移测量。
In order to simplify the complex and repeat calibration process of the measuring system in the traditional visual inspection, applied the laser measurement to visual inspection, and combined the distance parameters which is obtained by laser ranging with the related parameters of light spot image detection for precision dimension measurement. To further improve the measurement accuracy, based on the elliptic least squares fitting method, proposed a sub-pixel localization algorithm by detect the laser spot center distance. Designed a dimension measurement system according to the measuring method and several measurement accuracy testing. Results show that the relative accuracy of the method is better than 0.1% for the dimension measurement, meeting the industrialization demands, and can be extended to the displacement measurement of dynamic target.
出处
《机电工程技术》
2017年第9期85-88,共4页
Mechanical & Electrical Engineering Technology
关键词
激光测距
视觉检测
光斑中心
亚像素定位
尺寸测量
laser ranging
visual detection
laser spot center
sub-pixel positioning
dimension measurement
