摘要
提出了一种新型双频调制方式的相位式激光测距系统。该系统采用石英晶体滤波器对测距信号进行滤波,使用一套独特的基于欠采样测距信号的信号处理算法,灵活地解决了测尺频率、石英晶体滤波器中心频率、模数转换采样频率三者的匹配问题;同时给出了系统的方案设计以及与基于数字同步检测系统方案的对比。
The purpose of this paper is to present a new type of twofold modulation frequency phase-shift laser rangefinder.The system,taking advantage of quartz crystal filter,uses special signal process algorithm based on under-sampling technique.The algorithm solves the matching problem between measure frequency,ADC and quartz crystal filter＇s norminal frequency flexibly.The paper also presents design of this system,which is compared with anothes design based on digital synchronous detection.
出处
《电子器件》
CAS
2009年第1期195-199,共5页
Chinese Journal of Electron Devices
关键词
激光测距仪
欠采样
DDS
石英晶体滤波器
laser rangefinder
undersampling technique
DDS
quartz crystal filter
