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1. (WO2018161474) GRAVITY GRADIENT MEASUREMENT METHOD AND APPARATUS

Pub. No.:    WO/2018/161474    International Application No.:    PCT/CN2017/091107
Publication Date: Fri Sep 14 01:59:59 CEST 2018 International Filing Date: Sat Jul 01 01:59:59 CEST 2017
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 earth-vertical 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 three-axis accelerometer (1) and a second three-axis accelerometer (2) are located in the first chamber, the first three-axis accelerometer (1) and the second three-axis accelerometer (2) are symmetrical to each other on the x-axis with respect to the origin of coordinates, distances from the first three-axis accelerometer (1) and the second three-axis accelerometer (2) to the origin of coordinates are both R, the first three-axis accelerometer (1) and the second three-axis accelerometer (2) are symmetrical to each other on the z-axis with respect to the origin of coordinates, a distance, on the z-axis, between the first three-axis accelerometer (1) and the second three-axis accelerometer (2) is h; a measurement module determines, according to acceleration values measured by the first three-axis accelerometer (1) and the second three-axis accelerometer (2), a gravity gradient value in a coordinate system. The gravity gradient measurement method and apparatus of the invention measure a full-tensor gravity gradient by using two three-axis accelerometers.