基于激光多普勒效应的地面设备振动监测系统

对常见的几种振动监测方法进行了比较, 阐述了激光多普勒技术用于振动监测的基本原理, 设计了并研发了用于发射场小型地面设备振动监测的激光多普勒测振仪。以高精度PDV100型测振仪为对比, 并模拟小型地面设备低频、中频、高频的振动特性, 重点测量了其频率、振幅两个特征参数。实验结果表明, 自研测振仪对振动频率测量值的相对误差能够控制在0.4%以内, 对振幅的测量能够达到1 m量级, 满足发射场小型地面设备振动监测的需求。

Land-based facilities vibration monitoring system based on laser Doppler effect

Several vibration monitoring methods were compared. The basic principle of laser Doppler vibration monitoring was elaborated. A new kind of laser Doppler vibration monitoring system(LDVMS) that used for the small-size land-based facilities of launch site was designed. High precision PDV100-type LDVMS was used in the experiment. The electrodynamic loudspeaker, which was selected to simulate the frequency character of the small-size land-based facilities of launch site, its amplitude and vibration frequency were investigated as two important characteristic parameters. The analysis of experiment results show that the relative error of the vibration frequency is less than 0.4%, the amplitude can reach 1 m order of magnitude. The character of the designed LDVMS satisfies the need of launch site.