US 2020/0073010 A1Published application

Gravity gradient measurement method and apparatus

AssigneeInstitute of Electrical Engineering, Chinese Academy of Sciences

InventorsXinning HU, Qiuliang WANG, Jinyan LU, Hui WANG, Chunyan CUI

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Abstract

Provided is a gravity gradient measurement apparatus and measuring method, wherein a turntable rotates horizontally around an earth-vertical axis, a vacuum layer is arranged on the turntable defining a first chamber, a first three-axis accelerometer and a second three-axis accelerometer are located in the first chamber, the first three-axis accelerometer and the second three-axis accelerometer are arranged symmetrically on an x axis with respect to an origin of coordinates. Both the first three-axis accelerometer and the second three-axis accelerometer have a distance of R from the origin of coordinates. The first three-axis accelerometer and the second three-axis accelerometer are arranged symmetrically on an z axis with respect to the origin of coordinates, and the first three-axis accelerometer and the second three-axis accelerometer are spaced at a distance of h on the z axis. The measurement module uses measurements of the accelerometers to determine gravity gradients on the coordinate axes.

Claims15

Dependent claims

A gravity gradient measurement apparatus, comprising

a turntable (3), rotating horizontally around an earth-vertical axis,
a first three-axis accelerometer (1),
a second three-axis accelerometer (2),
a vacuum layer (7), arranged on the turntable and defining a first chamber with the turntable, and
a measurement module;
wherein,
the first three-axis accelerometer (1) and the 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 arranged symmetrically on an x axis with respect to an origin of coordinates;
both the first three-axis accelerometer (1) and the second three-axis accelerometer (2) have a distance of R from the origin of coordinates;
the first three-axis accelerometer (1) and the second three-axis accelerometer (2) are arranged symmetrically on an z axis with respect to the origin of coordinates;
and
the first three-axis accelerometer and the second three-axis accelerometer are spaced at a distance of h on the z axis;
and
the measurement module determines a gravity gradient on the coordinate axes according to acceleration values measured by the first three-axis accelerometer (1) and the second three-axis accelerometer (2).

11 more elements

A gravity gradient measurement method, comprising:

measuring acceleration using a first three-axis accelerometer (1) and a second three-axis accelerometer (2);
and
determining a gravity gradient on the coordinate axes according to the acceleration;
wherein,
the first three-axis accelerometer (1) and the second three-axis accelerometer (2) are arranged in a chamber defined by a turntable (3) and a vacuum layer (7);
the turntable (3) rotates horizontally around an earth-vertical axis;
the first three-axis accelerometer (1) and the second three-axis accelerometer (2) are arranged symmetrically on an x axis with respect to an origin of coordinates;
both the first three-axis accelerometer (1) and the second three-axis accelerometer (2) have a distance of R from the origin of coordinates;
the first three-axis accelerometer (1) and the second three-axis accelerometer (2) are arranged symmetrically on an z axis with respect to an origin of coordinates;
and
the first three-axis accelerometer and the second three-axis accelerometer are spaced at a distance of h on the z axis.

8 more elements

Dependencies are inferred from the claim text.