基于FPGA的激光位移测量系统设计  

Design of Laser Displacement Measurement System Based on FPGA

作　　者：李家奇 李静[1] Li Jiaqi

机构地区：[1]中国科学技术大学精密机械与精密仪器系

出　　处：《工业控制计算机》2019年第8期81-82,共2页Industrial Control Computer

摘　　要：采用激光三角法原理,设计了一种基于FPGA(Field-Programmable Gate Array)的激光位移测距系统。该系统利用FPGA可编程设计数字电路特点,设计了DDS(Direct Digital Synthesizer)信号发生器,用以实现对半导体激光器的调制;采用了快速傅里叶变换等信号处理技术实现了对信号的解调,提高了系统的抗干扰能力和系统的集成度。经系统标定,系统测量范围可以达到20mm,精度为24μm。A laser displacement measurement system based on FPGA(Field-Programmable Gate Array) is designed,and laser triangulation method is used in this paper.The system uses the characteristics of FPGA programmable design digital circuit,DDS(Direct Digital Synthesizer) signal generator is designed to realize the modulation of semiconductor laser,and signal processing technology such as fast Fourier transform is used to realize signal demodulation,which improve the anti-interference ability and the integration of the system.After system calibration,it is proved that the system can have a measuring range of 20 mm and an accuracy of 24μm.

关 键 词：光学三角法 FPGA 调制解调 微位移测量 

分 类 号：TH822[机械工程—仪器科学与技术] TN791[机械工程—精密仪器及机械]