包覆层厚度测量的悬臂梁挠度校正方法  

Cantilever beam deflection correction method for coating layer thickness measurement

作　　者：张帅 金永[1] 王召巴[1] ZHANG Shuai;JIN Yong;WANG Zhao-ba(School of Information and Communication Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学信息与通信工程学院,山西太原030051

出　　处：《传感器与微系统》2018年第11期58-59,62,共3页Transducer and Microsystem Technologies

摘　　要：测量较长的固体火箭发动机包覆层的厚度时,悬臂梁的挠度会增大,导致厚度的测量精度达不到0.05 mm的要求。为了校正悬臂梁的挠度,提出一种基于机器视觉的悬臂梁挠度检测方法。在悬臂梁支架上安装一点激光器,另一端安装一个反射板。采用电荷耦合器件(CCD)相机采集反射板上的激光点,对光电图像进行处理,计算出光点中心坐标,根据不同位置的光点坐标值,修正两次测量的挠度误差。实验验证:提出的误差最大不超过0.03 mm,测量厚度的精度满足0.05 mm。When measuring the thickness of the coating layer of long solid rocket engine,the deflection of the cantilever beam will increase,which results in measurement precision of the thickness can not reach requirement of0.05 mm.In order to correct the deflection of the cantilever beam,a method for detecting the deflection of cantilever beam based on machine vision is proposed.A point laser is installed on the cantilever beam support,a reflector is installed on the other end. The charge coupled device（CCD） camera is used to collect the laser points on the reflector.The photoelectric image is processed and the center coordinates of the light point are calculated. The deflection errors of the two measurements are corrected according to the coordinates of the light points in different positions.The method is verified by experiments.The maximum error is not more than 0.03 mm,and the precision of thickness measurement meets the requirement of 0.05 mm.

关 键 词：悬臂梁 挠度 电荷耦合器件相机 

分 类 号：TN247[电子电信—物理电子学]