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1. (WO2018161474) GRAVITY GRADIENT MEASUREMENT METHOD AND APPARATUS 


IPC:  G01V 7/00 

Applicants:  INSTITUTE OF ELECTRICAL ENGINEERING, CHINESE ACADEMY OF SCIENCES 中国科学院电工研究所 

Inventors:  HU, Xinning 胡新宁 WANG, Qiuliang 王秋良 LU, Jinyan 陆锦焱 WANG, Hui 王晖 CUI, Chunyan 崔春艳 
Title:  GRAVITY GRADIENT MEASUREMENT METHOD AND APPARATUS 
Abstract: 
A gravity gradient measurement method and apparatus. In the gravity gradient measurement apparatus, a turntable (3) rotates horizontally around an earthvertical axis, a vacuum layer (7) is disposed on the turntable (3), the vacuum layer (7) and the turntable (3) define a first chamber, a first threeaxis accelerometer (1) and a second threeaxis accelerometer (2) are located in the first chamber, the first threeaxis accelerometer (1) and the second threeaxis accelerometer (2) are symmetrical to each other on the xaxis with respect to the origin of coordinates, distances from the first threeaxis accelerometer (1) and the second threeaxis accelerometer (2) to the origin of coordinates are both R, the first threeaxis accelerometer (1) and the second threeaxis accelerometer (2) are symmetrical to each other on the zaxis with respect to the origin of coordinates, a distance, on the zaxis, between the first threeaxis accelerometer (1) and the second threeaxis accelerometer (2) is h; a measurement module determines, according to acceleration values measured by the first threeaxis accelerometer (1) and the second threeaxis accelerometer (2), a gravity gradient value in a coordinate system. The gravity gradient measurement method and apparatus of the invention measure a fulltensor gravity gradient by using two threeaxis accelerometers.
