【摘要】 针对高精度工业检测对精度、实时性与成本的综合需求，研制了一套量程0～2 mm、基于EtherCAT协议的高精度PSD测距系统。系统通过EtherCAT的DC同步技术，实现了PSD高频采样与高速总线传输的同步。以Micro-Epsilon激光位移传感器为基准进行标定，结果显示：系统满量程线性度误差在±0.15%内，最小通信周期达1 ms，传输速率较传统协议提升10倍以上，且硬件成本仅为同类商用仪器的1/10。更多还原

【Abstract】 Addressing the comprehensive requirements of high-precision industrial inspection for accuracy,real-time performance,and cost,this paper develops a high-precision PSD ranging system with a measurement range of 0～2 mm based on the EtherCAT protocol. The system achieves synchronization between PSD high-frequency sampling and high-speed bus transmission through EtherCAT’s DC synchronization technology. Calibration is performed using a Micro-Epsilon laser displacement sensor as a reference. The results show that the system has a full-scale linearity error of less than ±0.15%,a minimum communication cycle of 1 ms,and a transmission rate that is more than 10 times higher than that of traditional protocols. Furthermore,the hardware cost is only one-tenth of similar commercial instruments.更多还原