激光回馈双通道位移测量创新实验平台设计  

Design of Innovative Experimental Platform for Laser Feedback Dual-channel Displacement Measurement

作　　者：寇科 连天虹[1] 王错 王萌[1] 邵伟[1] KOU Ke;LIAN Tianhong;WANG Cuo;WANG Meng;SHAO Wei(School of Mechanical and Precision Instrument Engineering,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学机械与精密仪器工程学院,西安710048

出　　处：《实验室研究与探索》2024年第5期32-35,110,共5页Research and Exploration In Laboratory

基　　金：国家自然科学基金青年基金项目(61803302);西安理工大学教育教学改革研究项目(XJY2206)。

摘　　要：针对激光回馈技术中多目标同步检测以提高测量效率的问题,提出了一种基于线性调频的测量通道拓展方法。在线性电流注入下,激光器输出的光频率近似线性变化;2个被测物体到激光器距离不同时,回馈信号的频谱中出现分别对应2个物体的独立谱峰,通过全相位频谱分析方法在2个谱峰处进行相位解算可以重构2个物体的运动曲线。基于Python语言构建的仿真模型和相应的双通道位移测量实验系统均证实了该方法的有效性,2个通道的位移测量相对误差小于5%。Aims to promote efficiency in laser feedback technique used in simultaneous multi-target measurement,a measurement channel expanding method has been proposed.Under linear current injection,laser's output frequency exhibits almost linear variation.When two targets have different laser-to-target distances,two independent frequency peaks appear in the frequency spectrum of feedback signals.Through all-phase FFT analysis at these two peaks,motion curves of two targets can be reconstructed.Both of the simulation model built with Python language and the corresponding experimental system have validated the effectiveness of the method proposed,and the experimental results indicate that the relative measurement error is less than 5%.

关 键 词：激光回馈 双通道位移测量 线性调频 全相位频谱分析 

分 类 号：TH741[机械工程—光学工程] TN247[机械工程—仪器科学与技术]