二维投影式光学传感器轴类零件测量研究

Research on measurement of shaft parts based on two-dimensional projection optical sensor

针对各种轴类零件的测量问题,提出一种二维投影式光学测量方案。利用二维投影式光学传感器发射的平行LED光照射到物体表面,在物体后方形成与待测物体等大小的阴影。传感器使用二维CMOS对阴影进行捕捉后对其进行图像处理,得到测量数据,并对测量数据进行分析,得出测量结论。对试验的待测件进行测量后与其标准值进行对比,最大误差在0.01 mm以内,最大重复性在0.02 mm以内,判断准确率达99.8%,同时检测单个待测件用时少于10 s。该方法能够实现多尺寸同时测量,有效提高轴类零件测量速度,再配合机械手与传动机构,实现生产现场非接触在线测量,同时有效防止测量过程损伤零件。

Aiming at the problem that measurement of shaft parts,a method based on two-dimensional projection optical sensor is proposed.By measuring the shadows produced by parallel light on object,forming a shadow equal to the size of the object behind the object.Obtaining experimental data by processing the image that the shadows of workpiece captured by two-dimensional CMOS.Analyzed the measured data to obtain measurement conclusions.The maximum error is less than 0.01 mm,the maximum repeatability error is less than 0.02 mm,and the judgment accuracy is 99.8%.At the same time,it takes less than 10 s to measure a single test piece.This method can achieve simultaneous multi-size measurement,improved the measuring speed of shaft parts.Cooperate with manipulator and transmission mechanism to achieve non-contact online measurement at the production site,and effectively prevent damage to parts during the measurement.