基于视觉的活塞环闭口间隙自动测量关键技术研究  

Study on the Key Technologies of Automatic Measurement for the Close Clearance of Piston Ring Based on the Computer Vision

作　　者：兰太吉[1] 付鲁华[1] 赵娜[1] 王仲[1] 

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072

出　　处：《机械科学与技术》2015年第2期263-267,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家科技重大专项子项(2009ZX04014-092)资助

摘　　要：提出了一种运用机器视觉测量活塞环闭口间隙的新方法,实现对闭口间隙高精度、高效率的自动化检测。该方法从被测对象定位、照明条件设置和等物距测量控制等方面,确保了测量信息源头的准确性。提出了创新的视觉检测标定方法,给测量活动提供准确方便的溯源基准;给出了针对性的闭口间隙图像处理和基于最小距离法直线拟合的数据产生路线。实验证明:该方法对活塞环闭口间隙的测量结果有良好的准确性和稳定性。The new measurement method for the close clearance of piston ring is introduced based on the computer vision,which can automatically inspect the close clearance with high precision and efficiency. The correctness of original measured information is ensured by positioning the measured object precisely,selecting appropriate lighting conditions and controlling the consistent object distance. In order to provide the accurate and convenient traceability for the measurement,an innovative calibration method is developed. Then,the image processing technique designed for the close clearance and data operation based on the minimum distance method are also presented. Finally,the experimental results prove the high accuracy and stability for measuring the close clearance of piston ring.

关 键 词：活塞环 闭口间隙 视觉测量 等物距测量 最小距离法 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TK407[自动化与计算机技术—计算机科学与技术]