Design of intelligent receiver system for phase-shift laser range finder
This paper presents the design of an intelligent receiver system based on DSP and Avalanche photodiode. A new method of changing the reverse bias voltage based on the real-time measured noise of the system is proposed to avoid the environment influence on the performance of APD and to obtain the optimal operating performance of the whole system. Both the reverse-biased voltage and the automatic gain control loop are adjusted together by DSP, and so the high SNR is achieved and reception light saturation is eliminated. Method of compensating the walk error based on the reflected signal amplitude is used to improve the precision of phase shift measurement. The laser range finder fitted with the newly designed system can get a dynamic range 1:1500 and a phase-shift measurement resolution better than 0.045o. The measured diatance resolution is 0.125mm when the modulation frequency is 150MHz,.
intelligent control Avalanche photodiode optimum multiplication factor walk error
Jia Fang-xiu Ding Zhen-liang Yuan-Feng
Automatic measurement and control, Harbin institute of technology, Heilongjiang , China
国际会议
第五届仪器科学与技术国际学术会议(ISIST 2008)Fifth International Symposium on Instrmentation Science and Technology
沈阳
英文
1-8
2008-09-15（万方平台首次上网日期，不代表论文的发表时间）