Shock Calibration of High-g Accelerometer Using Laser Interferometer

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (11) : 149-153.

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Shock Calibration of High-g Accelerometer Using Laser Interferometer

FAN Jin-biao, ZU Jing, Lin Zu-sen, XU Peng, ZHAO Xiao-dong

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Abstract

Based on the analysis of the reflecting laser Doppler principle, the method for the chock calibration of high-g piezoresistive accelerometer was studied in this paper. The Hopkinson bar was used to generate an excited acceleration pulse which is absolutely measured using the differential laser interferometer. A set of calibration experiments was conducted for the accelerometer SIMIT-AYZ-60k. The shock sensitivity of the accelerometer was calculated from the quasi-dynamic data using the least squares method. It is demonstrated that this method is available for the calibration of the high-g accelerometers whose characteristic frequencies are different using the exciting pulse with the definite duration. The calibration accuracy is adequate to the engineering measurement.

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Index Terms: shock calibration / high-g accelerometer / laser doppler interferometer / Hopkinson bar / least squares method

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FAN Jin-biao;ZU Jing;Lin Zu-sen;XU Peng;ZHAO Xiao-dong. Shock Calibration of High-g Accelerometer Using Laser Interferometer[J]. Journal of Vibration and Shock, 2012, 31(11): 149-153