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Rotational accelerometer gravity gradiometer angular motion error compensation device and method

A technology of gravity gradiometer and rotational acceleration, which is applied in the field of precision measurement to improve the measurement accuracy and solve the effect of overvoltage saturation

Active Publication Date: 2020-01-07
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no public reports on the real-time compensation technology and device for the angular motion error of the gravity gradiometer

Method used

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  • Rotational accelerometer gravity gradiometer angular motion error compensation device and method
  • Rotational accelerometer gravity gradiometer angular motion error compensation device and method
  • Rotational accelerometer gravity gradiometer angular motion error compensation device and method

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0043] Depend on figure 1 It can be known that a rotational accelerometer gravity gradiometer angular motion error compensation device of the present invention includes an angular motion detection module, a reference signal generation module, an angular motion error transfer coefficient detection module, an angular motion error compensation signal generation module, and a centrifugal gradient detection module. Compensation operation module, gravity gradiometer accelerometer signal processing module, gravity gradient signal recovery module.

[0044] Wherein the centrifugal gradient detection module outputs the centrifugal gradient excitation of the gravity gradiometer in the calibration mode, and has no output in the non-calibration mode.

[0045] The angular motion detection module provides the angular velocity and angular acceleration signals of the gravity...

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Abstract

The invention discloses a device and a method for compensating the angular motion error of a rotary accelerometer gravity gradiometer. The device mainly comprises: an angular motion detecting module,detecting the angular motion of the gravity gradiometer in real time; a reference signal generating module, generating a quadrature amplitude modulation carrier in real time; an angular motion error transmission coefficient processing module, according to the compensated gravity gradiometer signal fed back, finely adjusting the angular motion error transmission coefficient in real time; an angularmotion error compensation signal generating module, generating an angular motion error compensation signal according to the input gravity gradiometer angular motion signal, the quadrature amplitude modulation carrier, and the angular motion error transmission coefficient; a compensation arithmetic module, compensating the gravity gradiometer signal containing the angular motion error; and a centrifugal gradient detection module, capable of detecting the centrifugal gradient experienced by the gravity gradiometer, and when the device is operating in the calibration mode, the output of the centrifugal gradient detection module is used to calibrate the gravity gradiometer scale factor.

Description

technical field [0001] The invention relates to a device and method for compensating an angular motion error of a rotational accelerometer, a gravity gradiometer, and belongs to the technical field of precision measurement. Background technique [0002] Gravity gradient exploration of moving base is a low-cost, high-efficiency gravity gradient exploration method; it is currently the most advanced gravity field exploration method in the world. Gravity gradient data are widely used in geological analysis, gravity field modeling, high-precision navigation, resource exploration, etc. Gravity gradiometer has extremely important national defense and civilian value. At present, the gravity gradiometers under research at home and abroad mainly include cold atom gravity gradiometers, superconducting gravity gradiometers, MEMS gravity gradiometers, etc. Gravity gradiometers that have been put into commercial application in foreign countries mainly include rotating accelerometer grav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V13/00G01V7/00
CPCG01V7/00G01V13/00
Inventor 蔡体菁喻名彪
Owner SOUTHEAST UNIV
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