NEW METHOD TO MEASURE PISTON SKIRT DIMENSIONS  

作　　者：QinYuexia HuDejin 

机构地区：[1]SchoolofMechanicalEngineering，ShanghaiJiaotongUniversity，Shanghai200030,China

出　　处：《Chinese Journal of Mechanical Engineering》2004年第3期368-371,共4页中国机械工程学报（英文版）

基　　金：This project is supported by the Fifth China Technology Innovational Items (No.01-101-19-13).

摘　　要：The measurement of the middle-convex and varying ellipse profile of a pistonskirt is a key technology because of its complex profile and high precision. Generally, a piston ismeasured on special device after it is machined. High accuracy can be achieved through this off-linemeasurement, but the result diverges from the actual dimension. Therefore, a no-contact in-sitemeasurement system is proposed. A laser displacement meter is used to measure the profile of thepiston skirt. A computer connected to the meter is used to process the measured data. A regressionanalysis method is used to process the ellipse section data. The method of moving average is used toprocess the middle-convex curve data. By using the given system, high measurement accuracy can begained, and the production requirement is met.The measurement of the middle-convex and varying ellipse profile of a pistonskirt is a key technology because of its complex profile and high precision. Generally, a piston ismeasured on special device after it is machined. High accuracy can be achieved through this off-linemeasurement, but the result diverges from the actual dimension. Therefore, a no-contact in-sitemeasurement system is proposed. A laser displacement meter is used to measure the profile of thepiston skirt. A computer connected to the meter is used to process the measured data. A regressionanalysis method is used to process the ellipse section data. The method of moving average is used toprocess the middle-convex curve data. By using the given system, high measurement accuracy can begained, and the production requirement is met.

关 键 词：Middle-convex and varying ellipse piston No-contact In-site measurement 

分 类 号：U464.133.1[机械工程—车辆工程]