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为了实现物体的三维振动分析测量,设计了一种基于五束激光的多普勒振动测量系统。该系统将五束激光汇聚到一个焦点,并照射到被反射膜覆盖的被测物体表面,经过反射后,散射光被光电二极管接收,并进入高精度信号处理系统,分别得到五路振动信息,通过计算机处理后,可以分别解析得到包括频率和振幅的三维振动信息。实验结果表明,该系统有望被应用于高精度的无接触振动测量。
In order to achieve three-dimensional vibration analysis and measurement of objects, a Doppler vibration measurement system based on five laser beams was designed. The system converges five laser beams to a focal point and irradiates the surface of the measured object covered by the reflective film. After being reflected, the scattered light is received by the photodiode and enters a high-precision signal processing system to obtain five-way vibration information respectively. After processing by computer, three-dimensional vibration information including frequency and amplitude can be separately analyzed. Experimental results show that the system is expected to be applied to high-precision non-contact vibration measurement.