Abstract：The primary shock calibration method using laser interferometry is presented, the method is based on the standard of ISO 16063-13. The characteristics of two typical shock exciters are introduced, including generated shock waveform. After digitizing of the phase-modulated signals at the output of a homodyne or heterodyne interferometer, the time-dependent displacement is reconstructed on the basis of the principle coherent demodulation. The data processing steps can efficiently suppress deterministic and stochastic disturbing quantities. Computer simulations and experimental investigations proved that the peak value and the spectral components of shock pulse can be measured with expanded uncertainties of less than 1%(k=2).
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2015, Vol. 36 
