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| Research on Calibration Technology of ReciprocalMagnetoelectric Vibration Sensor |
| LIAN Xiangkun1,CAI Chenguang2,KONG Ming1,LIU Zhihua2,LÜ Siyao1 |
1. Collage of Metrology & Measurement Engineering, China Jiliang University, Hangzhou, zhejiang 310018, China
2. National Institute of Metrology, Beijing 100029, China
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Abstract A new reciprocity calibration method for passive servo vibration sensors is proposed. This method is based on the basic principle of reciprocity calibration. According to the dual coil characteristics of passive servo vibration sensors, they are divided into calibrated sensors and reciprocal sensors. By establishing the vibration differential equation, the frequency response characteristics of the sensitivity ratio, sensitivity product, and reciprocity calibration coefficient of the two sensors are analyzed, and the corresponding calibration method is finally proposed. Based on this method, two experimental measurements are carried out to obtain the sensitivity ratio and sensitivity product, and combined with the reciprocal calibration coefficients, the calibration of passive servo vibration sensors is realized. And the experimental comparison with the laser interferometric method is carried out, and the experimental results show that the relative error of the calibration results of the two sensors is no more than 1% at the frequency of 1~100Hz.
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Received: 04 May 2023
Published: 29 November 2024
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2024, Vol. 45 
