介绍一个高精度的激光光纤传感式精密加工表面粗糙度在线检测系统。系统的工作原理基于表面散射理论 ,综合采用了光强补偿、调制、单通道信号处理以及互补采样等一系列技术 ,确保了测量的高精度。系统使用了单片微机 ,包括信号切换、互补采样、运算处理及显示打印等测量全过程 ,均由单片机控制 Introduce a high-precision laser fiber sensing precision machining surface roughness online detection system. The working principle of the system is based on the theory of surface scattering. It uses a series of techniques such as light intensity compensation, modulation, single-channel signal processing and complementary sampling to ensure the high precision of measurement. The system uses a single chip microcomputer, including signal switching, complementary sampling, computing and display printing and other measurement of the entire process, controlled by the microcontroller