STUDY OF SHOCK MEASUREMENTS USING HOMODYNE AND HETERODYNE LASER INTERFEROMETERS

H. Nozato, W. Kokuyama, A. Oota

Abstract

A comparison measurement using homodyne and commercial heterodyne laser interferometers was investigated in the primary shock facility of NMIJ. Each derived shock waveform was calculated by applying a two stage differentiation process with 4^th order Butterworth lowpass filter. As results, the time difference and the deviation between peak accelerations for two amplitude levels were respectively less than 1 µs and quite less than 0.01 %.

Keywords

shock, accelerometer, shock calibration, acceleration measurement, homodyne laser interferometer, heterodyne laser interferometer, laser Doppler vibrometer

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IMEKO-TC22-2014-007.pdf

DOI

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IMEKO TC

TC22 - Vibration Measurement

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