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Gravity gradient measurement apparatus and measurement method thereof

A gravity gradient and measuring device technology, applied in measuring devices, gravitational field measurement, geophysical measurement, etc., can solve problems such as complex measurement structures and measurement methods

Active Publication Date: 2017-08-04
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of the current gravity gradient measurement structure and measurement method complexity, to propose a simple gravity gradient measurement device and measurement method, the present invention can carry out full tensor gravity gradient measurement

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  • Gravity gradient measurement apparatus and measurement method thereof
  • Gravity gradient measurement apparatus and measurement method thereof

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Embodiment Construction

[0088] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0089] Such as figure 1 As shown, the gravity gradient measuring device of the present invention comprises a rotary table 3, a first three-axis accelerometer 1, a second three-axis accelerometer 2, a first magnetic shielding layer 4, a second magnetic shielding layer 5, a liquid nitrogen layer 6 and a vacuum Layer 7.

[0090] The rotary table 3 can rotate horizontally around the vertical axis of the ground, and the vacuum layer 7 , the first magnetic shielding layer 4 , the liquid nitrogen layer 6 and the second magnetic shielding layer 5 are arranged sequentially on the rotary table 3 from outside to inside. In the second magnetic shielding layer 5 on the rotating table 3, two three-axis accelerometers (1, 2) are symmetrically arranged at a distance of radius R with respect to the origin of the coordinate axes on the x-axis. The distance bet...

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Abstract

A gravity gradient measurement apparatus is disclosed. A rotation bench (3) is horizontally rotated about a ground vertical shaft. The rotation bench (3) is successively provided with a vacuum layer (7), a first magnetic shielding layer (4), a liquid nitrogen layer (6) and a second magnetic shielding layer (5) from outside to inside. In the second magnetic shielding layer (5), on an x axis, two triaxial accelerometers (1, 2) are symmetrically arranged about an original point of a coordinate axis and with a radius R distance. Distances between a first triaxial accelerometer (1) and an original point of a coordinate axis on an z axis, and between a second triaxial accelerometer (2) and the original point of the coordinate axis on the z axis are h / 2. The first magnetic shielding layer (4) is a normal temperature metal shielding layer and is used for shielding an external geomagnetic field interference. The second magnetic shielding layer (5) is a high-temperature superconductive shielding layer and is used for shielding an external alternating current magnetic field interference. In the invention, through the two triaxial accelerometers, full tensor gravity gradient measurement is realized.

Description

technical field [0001] The invention relates to a gravity gradient measuring device and a measuring method thereof. Background technique [0002] Gravity gradient measurement began in oil and gas census exploration applications. In the United States in the 1920s, the torsion balance gravity gradiometer was the only effective tool for oil and gas exploration census. Due to the cumbersome instrument and low efficiency, the research on the interpretation method of gradient data has not kept up, and it was gradually eliminated. However, with the development of the times, the importance of high-precision gravity gradient data has gradually emerged. Whether it is for geological exploration, fine simulation of the earth's gravity field or high-precision inertial navigation, it is indispensable. Gravity gradient measurement, that is, the measurement of the change of the earth's gravitational acceleration with space. Since the gravity gradient is the spatial differential of the ea...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V7/00
CPCG01V7/00G01V7/02G01V13/00H05K9/0077
Inventor 胡新宁王秋良陆锦焱王晖崔春艳戴银明严陆光
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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