Primary Low-g Shock Acceleration Calibration Using Laser Interferometry

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The current situation of low g shock is introduced with three types of shock exciters described. The measuring theory and system set-up using laser interferometry is explained in accordance with ISO 16063-13 with the emphasis on key technology of signal demodulation algorithm and air-bearing shock exciter based on collision. According to calibration results, the primary shock calibration system can achieve expanded uncertainty of 1%,k=2, in the acceleration range from 20m/s2 to 10000m/s2 and pulse duration from 0.5ms to 10ms.