| 远距离处固体面内位移测量的研究 |
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| 引用本文： | 贺顺忠,刘金凤,蒋诚志,张霄元,陈林才,姚欣. 远距离处固体面内位移测量的研究[J]. 仪器仪表学报, 2004, 25(1): 44-47 |
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| 作者姓名： | 贺顺忠 刘金凤 蒋诚志 张霄元 陈林才 姚欣 |
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| 作者单位： | 天津大学测试计量技术及仪器国家重点实验室,天津,300072 |
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| 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50m处固体的面内位移测量，效果令人满意，其相对误差约1％。
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| 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 |
| 修稿时间： | 2002-02-01 |
Study on In-plane Displacement Measurement of Remote Object |
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| He Shunzhong Liu Jinfeng Jiang Chengzhi Zhang Xiaoyuan Chen Lincai Yao Xin. Study on In-plane Displacement Measurement of Remote Object[J]. Chinese Journal of Scientific Instrument, 2004, 25(1): 44-47 |
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| Authors: | He Shunzhong Liu Jinfeng Jiang Chengzhi Zhang Xiaoyuan Chen Lincai Yao Xin |
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| Abstract: | 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%. |
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| Keywords: | Laser Doppler effect Acoustooptic modulator Phase grating Lock-in amplifier |
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