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Method for testing frequency response characteristics of laser displacement/vibration meters
Method for testing frequency response characteristics of laser displacement/vibration meters
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机译:激光位移/振动计频率响应特性的测试方法
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摘要
A method of testing frequency characteristics of a laser displacement/vibration meter by the use of a novel which can cope with a broader frequency range and finer micro-level displacements to enhance the reliability of the displacement/vibration meter. Upon applying impact on one end face of a round metal rod, an elastic wave pulse which propagates through the metal rod generates a stepwise dynamic displacement of the other end face of the rod when reflected there. This dynamic displacement is measured simultaneously by a reference laser interferometer with a reference laser beam and a laser displacement/vibration meter with unknown frequency response characteristics, followed by comparison of measurement data over a frequency range to determine the frequency response characteristics of the unknown laser displacement/vibration meter.
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