| 一种基于电流调制和DSP解调的激光自混合干涉测振仪 |
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| 引用本文： | 夏巍,张小元,岳邦强,戎华,郭冬梅.一种基于电流调制和DSP解调的激光自混合干涉测振仪[J].激光与光电子学进展,2010(4). |
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| 作者姓名： | 夏巍 张小元 岳邦强 戎华 郭冬梅 |
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| 作者单位： | 南京师范大学物理科学与技术学院江苏省光电技术重点实验室; |
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| 基金项目： | 江苏省普通高校自然科学研究计划(08KJBi510008) |
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| 摘 要： | 研究了半导体激光自混合干涉测振仪的调制与解调技术。设计了基于电流调制和DSP解调的半导体激光自混合干涉测量系统,实现对振动物体的非接触式测量。分析了激光自混合干涉测振仪的理论模型,并用Matlab进行了仿真和误差分析。研究了系统的调制解调技术及基于DSP的数据采集与处理系统。该系统体积小、成本低、易于准直。提出的测振仪能够测量振动频率在5kHz内的物体振动频率、振幅及振动波形,振动幅度测量精度可达0.325μm。
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| 关 键 词： | 测量 激光自混合干涉 测振仪 DSP技术 |
Laser Self-Mixing Interference Vibrometer Based on Current Modulation and DSP Demodulation |
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| Xia Wei Zhang Xiaoyuan Yue Bangqiang Rong Hua Guo Dongmei.Laser Self-Mixing Interference Vibrometer Based on Current Modulation and DSP Demodulation[J].Laser & Optoelectronics Progress,2010(4). |
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| Authors: | Xia Wei Zhang Xiaoyuan Yue Bangqiang Rong Hua Guo Dongmei |
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| Affiliation: | Jiangsu Provincial Key Laboratory on Opto-Electronic Technology;School of Physical Science and Technology Nanjing Normal University;Nanjing;Jiangsu 210097;China |
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| Abstract: | The modulation and demodulation technology of semiconductor laser self-mixing interference vibrometer is researched.With triangular wave modulation and DSP demodulation technology of self-mixing interference,a new type vibrometer is designed to achieve non-contact vibration measurement of a target.The theoretical model of the laser self-mixing interference vibrometer is analyzed and simulation and measurement error analysis are done using matlab.The modulation and demodulation technology of the vibrometer s... |
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| Keywords: | measurement laser self-mixing interference vibrometer DSP technology |
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