Calibration method of low frequency vibration sensor based on guideway bending correction of long stroke shaker

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (1) : 116-120.

YANG Ming1, CAI Chenguang2, LIU Zhihua2, WANG Ying3, 4, YANG Junjie5

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Abstract

Aiming at the effect of the bending in the long-stroke shaker’s guideway on the shaker-based low- frequency vibration sensor sensitivity magnitude calibration, the machine vision method was adopted to measure the bending. The calibration accuracy of the sensitivity magnitude was improved by establishing the correcting model to eliminate the effect of the bending. The bending measurement results show the greater load of the calibrated sensor, the greater bending, and the greater influence on the sensitivity magnitude calibration. The comparison experiments with the Earth’s graviation method demonstrate the calibration accuracy of the sensitivity magnitude with the bending correction was improved by an order of magnitude in the range from 0.04 to 2 Hz.

Key words

low-frequency vibration calibration / sensitivity magnitude / bending correcting / machine vision

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YANG Ming1, CAI Chenguang2, LIU Zhihua2, WANG Ying3, 4, YANG Junjie5. Calibration method of low frequency vibration sensor based on guideway bending correction of long stroke shaker[J]. Journal of Vibration and Shock, 2022, 41(1): 116-120

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