An improved torque type gravity gradiometer with dynamic modulation

作者：Luo, Jie; Xu, Jia-Hao; Liu, Qi^*; Shao, Cheng-Gang^*; Zhu, Lin; Zhao, Hui-Hui; Wu, Wei-Huang

来源：Acta Geodaetica et Geophysica, 2018, 53(2): 171-187.

DOI：10.1007/s40328-017-0202-z

• Improved torque type gradiometer
• Dynamic modulation
• Measuring efficiency
• Gravity gradient

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.

• 出版日期2018-6
• 单位中国地质大学（北京）; 华中科技大学; 中山大学