Unlock instant, AI-driven research and patent intelligence for your innovation.

A Calibration Method of Error Gain Coefficient of Rotational Accelerometer Gravity Gradient Meter on Moving Base

A Gravity Gradiometer and Rotational Acceleration Technology Applied in the Field of Precision Measurement

Active Publication Date: 2020-02-18
SOUTHEAST UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is currently no published literature reporting the calibration of the error gain factor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Calibration Method of Error Gain Coefficient of Rotational Accelerometer Gravity Gradient Meter on Moving Base
  • A Calibration Method of Error Gain Coefficient of Rotational Accelerometer Gravity Gradient Meter on Moving Base
  • A Calibration Method of Error Gain Coefficient of Rotational Accelerometer Gravity Gradient Meter on Moving Base

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0037] Four rotation accelerometer gravity gradiometer, the error model before demodulation is as follows:

[0038]

[0039] where k ggi is the scale factor of the gravity gradiometer, k in / cs , is the error gain coefficient caused by the inaccurate installation of the accelerometer inside the gravity gradiometer, is the scale coefficient of the internal accelerometer of the gravity gradiometer and the error gain coefficient caused by the mismatch of the circuit, It is the error gain coefficient caused by the accelerometer installation error misalignment inside the gravity gradiometer and the accelerometer scale coefficient mismatch. a x , a y , a z is the acceleration received by the gravity gradiometer in the x, y, and z directions; T 1 ,T 2 are the excitations of channels 1 and 2 of the gravity gradiometer, respectively; Ω is the rotational ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an error gain coefficient calibrating method for a moving base rotational acceleration meter gravity gradiometer. According to the method, through applying accelerations with different magnitudes, different directions and different frequencies on the gravity gradiometer, various errors of the gravity gradiometer are separated; and each error gain coefficient is calibrated.The calibrating method can calibrate the error gain coefficient caused by factors such as mounting inaccuracy of an acceleration meter in the gravity gradiometer, unmatched acceleration calibration coefficient of the acceleration meter and unmatched circuit. Furthermore the calibration method has advantages of simple operation and easy application.

Description

technical field [0001] The invention relates to a method for calibrating the error coefficient of a gravity gradiometer of a rotary accelerometer on a moving base, 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 gra...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01V13/00
CPCG01V13/00
Inventor 蔡体菁喻名彪
Owner SOUTHEAST UNIV