一种自带参考的调频激光绝对测距系统  

A Laser Absolute Measurement System with Reference Optical Path

作　　者：夏清沛 王刚[1,2] 王选择[1,2] 肖康达 左嘉伟 

机构地区：[1]湖北工业大学机械工程学院,湖北武汉430068 [2]湖北省现代制造质量工程重点实验室,湖北武汉430068

出　　处：《中国仪器仪表》2014年第12期63-66,共4页China Instrumentation

摘　　要：基于迈克尔逊干涉原理,通过对调频激光驱动下的参考与测量两束干涉信号的采集与处理,实现绝对距离的测量。在分析原理的基础上,设计了电流线性变化的激光驱动电路与简单实用的干涉信号光电转换电路。并应用FPGA的逻辑控制,实现了高速的串行数据采集,并通过后端与计算机的串行通信,将数据导入计算机。最后,通过matlab编程,对采集的数据进行信号处理,计算相位差的同时,得出所测绝对距离。Based on the Michelson interference principle, the absolute distance measurement is realized by acquisition and processing of the reference and measurement interference signals when laser frequency is modulated. After analyzing the measurement principle, the laser driving circuit of current linear variation is designed, simple and practical photoelectric conversion circuit for the interference signal as well. Applying FPGA Logic control, the high speed serial data acquisition is completed, and through the serial communication with the computer of the back end, the data enters into the computer. Finally, using the MATLAB programming,the data signal is processed, and get the result of phase difference reecting the absolute distance.

关 键 词：绝对距离测量 数据采集 FPGA 信号处理 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]