Title:
DEVICE AND METHOD FOR COMPENSATING FOR ERROR OF MOVING-BASE ROTATING-ACCELEROMETER GRAVITY GRADIOMETER
Document Type and Number:
WIPO Patent Application WO/2020/042696
Kind Code:
A1
Abstract:
Disclosed are a device and method for compensating for an error of a moving-base rotating-accelerometer gravity gradiometer. A signal of the gravity gradiometer before demodulation is compensated by calculating an angular motion error, a linear motion error, and a self-gradient of the gravity gradiometer according to the detected angular motion, linear motion, attitude angle of the gravity gradiometer, and based on an analytic model and a self-gradient model of the gravity gradiometer, and performing quadrature amplitude modulation of the angular motion error, the linear motion error, and the self-gradient. The present invention not only compensates for the angular motion error, the linear motion error, and the self-gradient in an output signal of the gravity gradiometer, but also solves the problems of over-voltage damage and over-voltage saturation of a conditioning circuit at a front end of the gravity gradiometer caused by the angular motion, the linear motion, and the self-gradient of the gravity gradiometer. The compensated signal of the gravity gradiometer is used to feedback and regulate a linear motion error transfer coefficient, an angular motion error transfer coefficient, and an accelerometer scale coefficient, and the influence of environmental factors, such as the temperature and magnetic fields, on the error transfer coefficients of the gravity gradiometer can be offset.
Inventors:
CAI TIJING (CN)
YU MINGBIAO (CN)
YU MINGBIAO (CN)
Application Number:
PCT/CN2019/089302
Publication Date:
March 05, 2020
Filing Date:
May 30, 2019
Export Citation:
Assignee:
UNIV SOUTHEAST (CN)
International Classes:
G01V7/00; G01V13/00
Foreign References:
| CN109212620A | 2019-01-15 | |||
| CN107870371A | 2018-04-03 | |||
| CN105717553A | 2016-06-29 | |||
| US7181967B2 | 2007-02-27 |
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
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