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Acta Geodaetica et Geophysica

, Volume 53, Issue 2, pp 171–187 | Cite as

An improved torque type gravity gradiometer with dynamic modulation

  • Jie Luo
  • Jia-Hao Xu
  • Qi Liu
  • Cheng-Gang Shao
  • Lin Zhu
  • Hui-Hui Zhao
  • Wei-Huang Wu
Original Study
  • 283 Downloads

Abstract

Traditional torque type gravity gradiometer has an important pole in gravity gradient measurements, while it is relatively inefficient and with the precision of about 1 E mainly caused by the static operating mode. In this paper, we develop an improved torque type gravity gradiometer to improve the measuring efficiency, which is based on the dynamic modulation. The dynamic modulation keeps the gradiometer rotating on a turntable steadily, measures the deflection angle of the torsion pendulum continuously and then obtains the gravity gradients. The result shows that after using the improved gradiometer, the gradients W xz and W yz are obtained with precisions of 0.45 E and 0.32 E respectively in a cycle of 20 min.

Keywords

Improved torque type gradiometer Dynamic modulation Measuring efficiency Gravity gradient 

Notes

Acknowledgements

This work is partially supported by the National Natural Science Foundation of China (Grant Nos. 11575160, 91636221, 11605065).

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Copyright information

© Akadémiai Kiadó 2017

Authors and Affiliations

  1. 1.School of Mechanical Engineering and Electronic InformationChina University of GeosciencesWuhanChina
  2. 2.TIANQIN Research Center for Gravitational Physics, School of Physics and AstronomySun Yat-sen UniversityZhuhaiChina
  3. 3.MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of PhysicsHuazhong University of Science and TechnologyWuhanChina

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