基于LabVIEW和激光测振仪的三维振动测量系统

A Three-Dimensional Vibration Measuring System Based on LabVIEW and Laser Doppler Vibrometer

摘要: 基于LabVIEW软件开发工具和激光多普勒测振仪，开发了一套能够测量物体三维振动信息的系统。该系统主要由五台单维激光测振仪组成的硬件系统、数据采集卡以及软件系统组成。软件系统利用硬件系统和数据采集系统提取的五路振动数据，通过算法最终转化成物体空间三维振动信息(X、Y和Z三个方向的时域信息)，对时域信息进行分析，最终可以得到物体振动的频谱信息、自功率谱、互功率谱等。该系统采用非接触的方式，可以准确测量出物体在空间中的三维振动信息，通过这些信息，可以准确判断物体的振动状态。

Abstract: The equipment can measure the vibrator’s three-dimensional vibration information, which has been developed based on the LabVIEW software development tools and Laser Doppler Vibrometer (LDV). It mainly includes hardware system that contains five LDVs, data acquisition system and software system. In the experiment, the hardware system and data acquisition system get the five channel vibration data which are used for converting to the three-dimensional vibration informa-tion (the time-domain data of X axis, Y axis and Z axis) by software system. With these data, we can also get the power spectrum, cross-power spectrum and so on. The equipment can accurately measure the vibration data in a non-contact way, which can be used to analyze the state of the vi-brator.