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An improved torque type gravity gradiometer with dynamic modulation

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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.

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Acknowledgements

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

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Authors and Affiliations

  1. School of Mechanical Engineering and Electronic Information, China University of Geosciences, Wuhan, 430074, China

    Jie Luo, Jia-Hao Xu & Wei-Huang Wu

  2. TIANQIN Research Center for Gravitational Physics, School of Physics and Astronomy, Sun Yat-sen University, Zhuhai, 519000, China

    Qi Liu

  3. MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China

    Cheng-Gang Shao, Lin Zhu & Hui-Hui Zhao

Authors
  1. Jie Luo
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  2. Jia-Hao Xu
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  3. Qi Liu
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  4. Cheng-Gang Shao
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  5. Lin Zhu
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  6. Hui-Hui Zhao
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  7. Wei-Huang Wu
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Corresponding authors

Correspondence to Qi Liu or Cheng-Gang Shao.

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Luo, J., Xu, JH., Liu, Q. et al. An improved torque type gravity gradiometer with dynamic modulation. Acta Geod Geophys 53, 171–187 (2018). https://doi.org/10.1007/s40328-017-0202-z

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  • DOI: https://doi.org/10.1007/s40328-017-0202-z

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