Vibration Calibration Method Based on the Decoding of Heterodyne Interferometer Output S/PDIF Digital Signal
WANG Zhao1,CAI Chen-guang2,YANG Ming3,KONG Ming1,GUO Tian-tai1,WANG Dao-dang1
1. Collage of Metrology & Measurement Engineering, China Jiliang University, Hangzhou, zhejiang 310018, China
2. National Institute of Metrology, Beijing 100029, China
3. The Electrical Engineering College, Guizhou University, Guiyang, Guizhou 550025, China
Abstract：An accelerometer calibration method based on Polytec heterodyne interferometer output S/PDIF digital signal decoding is proposed, which optimizes the calibration process and guarantees the sensitivity magnitude and phase calibration accuracy of the accelerometer. Comparing with the calibration results of the heterodyne interferometry recommended by ISO 16063-11 in the frequency range from 5Hz~20kHz, the relative error of sensitivity magnitude and difference of sensitivity phase by the proposed method are less than 0.969% and 0.165° respectively; the relative standard deviation of sensitivity magnitude and the standard deviation of sensitivity phase are less than 0.560% and 0.356° respectively.
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2021, Vol. 42 
