公开(公告)号：US11372129B2

公开(公告)日：2022-06-28

申请号：US17418848

申请日：2019-05-30

Applicant: SOUTHEAST UNIVERSITY

Inventor： Tijing Cai ,  Mingbiao Yu

IPC: G01V7/06 ,  G01P15/18

Abstract: A post-compensation method for motion errors of a rotating accelerometer gravity gradiometer includes the steps of: during moving-base gravity gradient exploration, recording angular and linear motions of a gravity gradiometer; after the exploration, removing angular and linear motion errors from output data of the gravity gradiometer based on an analytical model of the rotating accelerometer gravity gradiometer; while ensuring that the precision of the gravity gradiometer is unchanged, the post-compensation method for the motion errors may be applied to greatly reduce the requirements of the gravity gradiometer for the precision of an online error compensation system, thereby simplifying the circuit design and mechanical design of the rotary accelerometer gravity gradiometer, and making the rotating accelerometer gravity gradiometer simpler and cheaper.

公开(公告)号：US11372130B2

公开(公告)日：2022-06-28

申请号：US17421383

申请日：2019-05-30

Applicant: SOUTHEAST UNIVERSITY

Inventor： Tijing Cai ,  Mingbiao Yu

IPC: G01V13/00 ,  G01P15/18 ,  G01V7/02

Abstract: Disclosed is a calibration method for a rotating accelerometer gravity gradiometer, wherein linear motion error coefficients, angular motion error coefficients, self-gradient model parameters and scale factors of the rotating accelerometer gravity gradiometer are calibrated once by changing linear motion, angular motion, and self-gradient excitations of the rotating accelerometer gravity gradiometer. The calibrated linear and angular motion error coefficients are used for compensating for motion errors of the gravity gradiometer online, and the calibrated self-gradient model parameters are used for self-gradient compensation. The calibration method provided by the present invention is easy to operate and not limited by any calibration site, thereby being suitable for programmed self-calibration and realizing an important engineering value.