图像辅助汽车制动主缸补偿孔法线测量  

Image aided measurement of the automotive brake master cylinder compensation hole normal line

作　　者：赵长福 丁红昌[1,2] 曹国华 侯翰[1] ZHAO Chang-fu;DING Hong-chang;CAO Guo-hua;HOU Han(Mechanical Engineering,Changchun University of Science and Technology,Changchun 130022,China;Chongqing Research Institute,Changchun University of Science and Technology,Chongqing 401135,China)

机构地区：[1]长春理工大学机电工程学院,吉林长春130022 [2]长春理工大学重庆研究院,重庆401135

出　　处：《中国光学》2021年第5期1212-1223,共12页Chinese Optics

基　　金：国家重大科学仪器设备开发项目(No.2017YFF0105304);吉林省科技发展计划重点研发项目(No.20200401117GX);吉林省省级产业创新专项资金项目(No.2018C038-4)。

摘　　要：随着道路上汽车的增多,汽车制动系统的可靠性受到越来越多的关注,基于机器视觉的汽车制动主缸补偿孔参数检测精度,是决定汽车安全性和停车可靠性的关键技术,补偿孔作为汽车制动主缸的重要组成部分,可以起到调节汽车制动主缸储液罐与压力室中制动液的重要作用,其尺寸精度和加工质量受到严格的控制,因此如何准确的获取补偿孔的图像是补偿孔参数检测的首要问题。通过将飞机钻铆孔法线找正的方法引入到图像获取中,将四点微平面法线检测方法与图像处理相结合,实现高效高精度的法线找正。实验表明,本文算法法线找正精度高于0.05°,优于传统检测精度的0.5°,检测时间小于1 s。本文提出的算法在满足精度要求的情况下,算法简单,实时性高,同时具有较好的鲁棒性,满足制动主缸生产工业现场对于检测速度和精度的要求。With the increase in cars on the road,the reliability of automobile braking systems has received increasing attention.The detection accuracy of the compensation hole’s parameters of an automobile’s brake master cylinder based on machine vision is key to determining automobile safety and the reliability of parking technology.As an important part of automobile brake master cylinders,the compensation hole can play an important role in regulating the brake fluid in its reservoir and pressure chamber.Its dimensional accuracy and processing quality are strictly controlled,so accurately obtaining an image of the compensation hole is a priority in compensation hole parameter detection.By introducing the correction method of plane drilling rivet hole normal line into the image acquisition process,the four-point micro-plane normal line detection method is combined with image processing to realize high-efficiency and high-precision normal line correction.Experiments show that the algorithm's normal alignment accuracy is higher than 0.05°,which is better than the traditional detection accuracy of 0.5°,and the detection time is less than 1 s.The algorithm proposed in this paper is simple and has good real-time performance while meeting accuracy requirements.It also has good robustness and meets the requirements of the brake master cylinder production industry for detection speed and accuracy.

关 键 词：激光测距 法线检测 梯度霍夫变换 椭圆拟合 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]