基于气体池信号拼接的高精度调频连续波激光测距
投稿时间:2019-09-24  修订日期:2020-04-15  点此下载全文
引用本文:伊灵平,张福民,曲兴华,李雅婷.基于气体池信号拼接的高精度调频连续波激光测距[J].红外与毫米波学报,2020,39(3):331~338].YI Ling-Ping,ZHANG Fu-Min,QU Xing-Hua,LI Ya-Ting.High precision frequency modulated continuous wave (FMCW) laser ranging based on gas cells signal splicing[J].J.Infrared Millim.Waves,2020,39(3):331~338.]
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作者单位E-mail
伊灵平 天津大学 精密测试技术及仪器国家重点实验室 yi_lingping@163.com 
张福民 天津大学 精密测试技术及仪器国家重点实验室 zhangfumin@tju.edu.cn 
曲兴华 天津大学 精密测试技术及仪器国家重点实验室  
李雅婷 天津大学 精密测试技术及仪器国家重点实验室  
基金项目:国家自然科学基金 51675380 51775379国家自然科学基金(51675380,51775379)
中文摘要:在双光路调频连续波激光测距系统中,辅助光纤的长度标定精度直接影响了系统的测距精度。提出一种基于氰化氢气体池信号拼接的辅助光纤标定方法,通过提高辅助光纤标定精度进而提高系统测距精度。深入研究了基于氰化氢气体池标定方法的原理,为减小数据采集系统负担,利用信号拼接的方法进行改进。实验表明,与传统激光干涉仪的光纤标定方法相比,基于气体池拼接的标定方法具有更高的稳定性,同时,在3.8 m测量范围内,采用该标定方法的测距系统与干涉仪标准距离值误差不超过14 μm,测量标准差低于17 μm。
中文关键词:调频连续波激光测距  光纤标定  氰化氢气体吸收池  重采样
 
High precision frequency modulated continuous wave (FMCW) laser ranging based on gas cells signal splicing
Abstract:In the dual-path FMCW laser ranging system, the length calibration accuracy of the reference optical fiber directly affects the ranging accuracy. In order to improve the ranging accuracy, a high precision reference optical fiber calibration method was proposed, which was based on hydrogen cyanide(H13C14N) gas cells signal splicing. In this paper, the principle of calibration method based on H13C14N gas cells was deeply researched. Moreover, to reduce the burden of data acquisition, H13C14N signal splicing was used to optimize the calibration method. The experiments show that the calibration method based on H13C14N signal splicing is more stable than that based on laser interferometer traditionally. After calibrating the reference optical fiber by using H13C14N. At the same time, within a measuring range of 3.8 m, the error between ranging value of FMCW system and measuring value of interferometer is less than 14 μm, and the standard deviation is less than 17 μm.
keywords:FMCW laser ranging  optical fiber calibration  H13C14N gas cells  resampling
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