基于FPGA与TDC-GPX2的相位激光测距系统设计  

Design of phase laser ranging system based on FPGA and TDC-GPX2

作　　者：董驰 李孟委 赵宇[1,3] 岳俊哲 李晋华[1,3] DONG Chi;LI Mengwei;ZHAO Yu;YUE Junzhe;LI Jinghua(Nantong Institute of Intelligent Opto-mechatronics,North Universily of China,Nantong 226000,China;School of Instrument and Electronics,North University of China,Taiyuan 030051,China;Academy for Aduanced Interdisciplinary Research,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学南通智能光机电研究院,江苏南通226000 [2]中北大学仪器与电子学院,太原030051 [3]中北大学前沿交叉科学研究院,太原030051

出　　处：《激光杂志》2022年第3期34-37,共4页Laser Journal

基　　金：山西省面上自然基金项目(No.201901D111145)。

摘　　要：针对传统相位测距系统精度不高和结构复杂等缺陷,设计出一种基于FPGA与TDC-GPX2的相位激光测距系统。该系统首先设计了激光发射和接收部分的光学结构,其次设计了硬件系统中的光电检测电路和混频电路,最后采用数字转换芯片TDC-GPX2测量发射信号和反射信号的时间差,并以FPGA为核心处理器进行数字鉴相将时间差转化为相位差,从而求解出测距距离。实验测得的数据和结果表明,该测距系统简单实用且测量性能较高,使用TDC-GPX2芯片可将测距精度控制在毫米量级范围内,满足实际应用需求。Aiming at defects of low precision and complex structure of traditional phase ranging system,a phase laser ranging system based on FPGA and TDC-GPX2 is designed.The optical structures of laser transmitting and receiving part are designed.Secondly,photoelectric detection circuit and mixing circuit in hardware system are designed.Finally,digital conversion chip TDC-GPX2 is used to measure time difference between transmitted signal and reflected signal,and FPGA is used as core processor for digital phase detection to convert time difference into phase difference for calculating ranging distance.The experimental data and results show that ranging system is simple,practical and has high measurement performance.Using TDC-GPX2 chip,the ranging accuracy can be controlled in the range of millimeter to meet the needs of practical application.

关 键 词：相位 激光测距 FPGA TDC-GPX2 

分 类 号：TN249[电子电信—物理电子学]