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| A Torsion Balance Device for Measuring the Gravity Gradient |
| YU Ye1,HU Xiang1,XIONG Chao2,SHI Wen-jing3,TU Liang-cheng2 |
1. Hubei Instiute of Measurement and Testing, Wuhan, Hubei 430071, China
2. Key Laboratory of Gravity Navigation of Ministry of Education, School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
3. Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
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Abstract Based on the principle of torsion balance measuring gravity gradient , a torsion balance gravity gradiometer was designed, which consists of a torsion balance system, an angle measurement system, an amplitude attenuation system, a turntable system, a vacuum container system. Considering the stable time of torsion balance suspension system was too long, which had great impacted the efficiency of the gravity gradient measurement, an amplitude attenuation system was designed in combination with PID control technology.Simulation results show that, the curvature and horizontal gravity gradient could be measured, the accuracy was as high as 0.5 E(1E=1×10-9m/s2), and the limit efficiency of measuring a group of gravity gradients was better than an hour.
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Received: 29 October 2017
Published: 11 February 2018
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2018, Vol. 39 
