目前精密回转体零件的圆度测量,多在离线状态下在圆度仪上进行。近年来使用多测微传感器,应用误差分离技术实现了圆度的高精度在线测量,虽获得了令人满意的实验成果,但仍存在原理误差,且多点测量法系统庞大,原理复杂,条件要求严格,不易在线实用。为此使用电容测微传感器和8095单片微机构成数据采集和处理系统,利用传统的单点测量原理,实现了圆度的高精度在线测量,且为进一步的补偿加工提供了一个较为实用的监测手段。本文介绍精密零件在车削、磨削过程中的在线圆度单点式测量系 At present, the roundness measurement of the parts of the precision rotary body is mostly performed on the roundness meter under the offline state. In recent years, the use of multi-microscopic sensors, the application of error separation technology to achieve high-precision circularity on-line measurement, although satisfactory experimental results, but there are still principle errors, and multi-point measurement system is large, complex principle, conditions Strict requirements, not easy online practical. For this purpose, a capacitive micrometer sensor and a 8095 single-chip microcomputer are used to form a data acquisition and processing system. By using the traditional single-point measurement principle, a high-precision on-line measurement of roundness is realized and a more practical monitoring is provided for further compensation processing means. This article describes the precision round in the turning, grinding process of the roundness of the single-point measurement system