超低频激光干涉法振动幅相特性测量技术的研究

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (11) : 130-134.

论文

超低频激光干涉法振动幅相特性测量技术的研究

于梅; 刘爱东; 马明德; 杨丽峰; 左爱斌; 胡红波

作者信息 +

Research of the ultra- low frequency vibration magnitude and phase measurement technology using laser interferometry

Yu Mei，Liu Ai-dong，Ma Ming-de, Yang Li-feng, Zuo Ai-bin, Hu Hong-bo

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摘要

基于对结构动力学、地球物理和地震物探等研究领域中超低频振动计量器具量值溯源迫切需求的分析，对超低频（低至0.002Hz）、大振幅（1m（p-p））激光绝对法振动幅值和相位测量技术进行了研究。针对激光干涉仪在动态超低频、大振幅情况下，跟踪测量性能变差的问题，研制了具有直流输出特性的大光程零差正交激光干涉仪；采用自主提出的自适应动态分解算法,解决了超低频数据量庞大、数据采集处理困难的技术难题.。给出了在超低频振动台上对石英挠性加速度计进行校准的实验数据。结果表明，该系统可实现动态光程大于1m、频率范围0.002Hz~2kHz的加速度幅值和相位的激光绝对法精确测量。

Abstract

Based on urgent needs for quantity traceability of ultra-low frequency vibration measuring instruments on research fields such as Structural Dynamics, Geophysics and Seismic Geophysical Prospecting etc., the ultra- low frequency (~0.002Hz) and large amplitude (1mp-p) laser interferometry vibration magnitude and phase measurement technology is researched. According to the fact that the tracking measurement capability of laser interferometry will deteriorate in the case of the dynamic ultra-low frequency and large amplitude, the homodyne quadrature laser interferometer with DC output characteristic is developed. To solve the key technical problem of the difficulty to collect and process data，because of the enormous data in the range of ultra-low frequency, Self-adaptive Dynamic Decomposition Algorithm is presented. Experimental data of the quartzose flexible accelerometer is given. The results show that this measuring system can accurately measure the magnitude and phase of acceleration with laser interferometry in the frequency range of 0.002Hz~2kHz and the dynamic optical path of more than 1m.

导出引用

于梅;刘爱东;马明德;杨丽峰;左爱斌;胡红波. 超低频激光干涉法振动幅相特性测量技术的研究[J]. 振动与冲击, 2011, 30(11): 130-134

Yu Mei;Liu Ai-dong;Ma Ming-de;Yang Li-feng;Zuo Ai-bin;Hu Hong-bo. Research of the ultra- low frequency vibration magnitude and phase measurement technology using laser interferometry[J]. Journal of Vibration and Shock, 2011, 30(11): 130-134