中国激光, 2000, 27 (8): 751, 网络出版: 2006-08-09
散射面位移激光多普勒测量技术的研究
Study on Measurement Technique of Scattering-surface Displacement Utilizing Laser Doppler Effect
多普勒效应 横向位移 微弱信号检测 丢失信号重构 Doppler effect lateral displacement weak signal detection lose signal reconstruction
摘要
研究利用激光多普勒效应在远距离对一般散射面进行横向位移测量的检测技术。通过在光路中对信号调制，在电路中利用锁相放大器提高信噪比，解决了微弱信号检测的问题。用锁相环路对丢失信号重构，改善了信号质量。对测量原理进行了分析，阐明了进行微弱信号检测和信号重构的机理。
Abstract
A measurement system of scattering-surface displacement utilizing laser Doppler effect is discussed. Lock-in amplifier (LIA) and phase-locked loop (PLL) are used in signal processing. The lateral displacement measurement at the long-distance of 10 meters was realized.
张霄元, 洪昕, 贺顺忠, 张晓芳, 蒋诚志, 陈林才. 散射面位移激光多普勒测量技术的研究[J]. 中国激光, 2000, 27(8): 751. 张霄元, 洪昕, 贺顺忠, 张晓芳, 蒋诚志, 陈林才. Study on Measurement Technique of Scattering-surface Displacement Utilizing Laser Doppler Effect[J]. Chinese Journal of Lasers, 2000, 27(8): 751.
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