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Analysis of Effect of Acceleration Sensor on Vibration Compensation of Gravimeter |
MA De-kai1,LI Chun-jian2,3,FENG Jin-yang2,3,FAN feng1,YAO Jia-min2,3,WANG Qi-yu2,3,HU Ruo2,3 |
1. College of Mathematical Sciences and Engineering, Hebei University of Engineering, Handan, Hebei 056038, China
2. National Institute of Metrology, Beijing 100029, China
3. Key Laboratory of Time and Frequency and Gravity Acceleration of State Administration for Market Regulation, Beijing 100029, China |
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Abstract In order to analyze the compensation effect of accelerometer on gravimeter, based on the NIM-3C absolute gravimeter, a platform gravimetric experiment platform was built, the laser vibrometer output signal was used as the standard signal, and the vibration collection performance of three different types of acceleration sensors, MSA1000A-02, 991B, and INV9832-50, in the platform based gravity measurement environment was calibrated through experiments. The experimental results show, in order to ensure that the gravity measurement uncertainty under this condition is smaller than several milligal, the measurement error of the acceleration sensor should be limited to within several hundred μGal. The extreme difference between the quadratic term fit coefficient of the vibration (standard signal) measured by the MSA1000A-02 sensor and the laser vibrometer is 2.94 μGal (1 μGal=1×10-8m/s2) under the platform gravity measurement condition, which meets the uncertainty and bandwidth requirements of this condition.
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Received: 01 August 2022
Published: 17 November 2023
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