物理学报Issue(18)：1-6,6.DOI:10.7498/aps.63.184209
高分辨率调频连续波激光绝对测距研究
Absolute distance measurement by high resolution frequency mo dulated continuous wave laser
摘要
Abstract
Large-scale high-accuracy measurement plays an important role in many applications, such as large-scale equipment manufacturing, space technology and national defense industry. High-accuracy absolute distance measurement by laser is an important research topic in the field of large-scale high-accuracy measurement. And frequency modulated continuous wave (FMCW) laser ranging is a hot point of research nowadays. Because this method is better than pulsed time-of-flight method in measurement resolution, and the problem of ambiguity in measurement, which is the main disadvantage of phase-related method, does not exist. In this paper, the principle of FMCW laser ranging and the main factors reducing the measurement resolution are analyzed. In order to improve the ranging resolution, the method using an auxiliary interferometer to sample the signal in equal intervals of optical frequency is employed. A dual interferometer FMCW laser ranging system is designed and the experiments are carried out. The experimental results show that the measurement resolution is 50 µm at a distance of 10 m.关键词
连续激光调频/绝对测距/干涉测量Key words
lasers frequency modulated/absolute distance measurement/interferometry引用本文复制引用
时光,张福民,曲兴华,孟祥松..高分辨率调频连续波激光绝对测距研究[J].物理学报,2014,(18):1-6,6.基金项目
国家自然科学基金(批准号:51327006,51105274)和高等学校博士学科点专项科研基金(批准号:20120032130002)资助的课题.* Project supported by the National Natural Science Foundation of China (Grant Nos.51327006,51105274), and the Spe-cialized Research Fund for the Doctoral Program of Higher Education of China (Grant No.20120032130002) （批准号:51327006,51105274）
