远距离处固体面内位移测量的研究  

Study on In-plane Displacement Measurement of Remote Object

作　　者：贺顺忠[1] 刘金凤[1] 蒋诚志[1] 张霄元[1] 陈林才[1] 姚欣[1] 

机构地区：[1]天津大学测试计量技术及仪器国家重点实验室,天津300072

出　　处：《仪器仪表学报》2004年第1期44-47,共4页Chinese Journal of Scientific Instrument

基　　金：博士点基金资助项目

摘　　要：为了利用激光多普勒效应实现远距离处固体面内位移测量 ,研究了激光多普勒差动方法和锁相放大、同态滤波等技术 ,设计出能获得大的多普勒信号强度的差动光路 ,高灵敏度、大 Q值的锁相放大器和能重构丢失信号的同态滤波器等。实验结果证明将由它们所组成的系统用于 5 0 m处固体的面内位移测量 ,效果令人满意 ,其相对误差约 1%。To achieve in-plane displacement measurement of remote object utilizing laser Doppler effect,the laser Doppler differential method,lock-in amplifier,homomorphic filter are studied and the differential optical system which can get Doppler signals with high intensities,the lock-in amplifier with high sensitivity and big Q, the homomorphic filter which can re-construct lost signals are designed.The experiments prove that the results are satisfied when the system is applied to the in-plane displacement measurement of object in distance of 50m,and the relative error is 1%.

关 键 词：位移测量 激光多普勒效应 声光调制器 差动光路 固体面 

分 类 号：TH822[机械工程—仪器科学与技术]