A new method of measuring the outcr-circle contour of piston-ring was presented. The measuring way. Instrument structure, crror analysis and test results were also introduced.

• 提出一种测量活塞环外圆轮廓的方法，介绍了根据该方法研制的轮廓仪的测量方案、仪器结构、误差分析和测试结果。