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Calibration and compensation method for mounting errors between triaxial vector sensor and mounting carrier

A technology of installation error and compensation method, which is applied to measuring devices, instruments, reducing undesired effects, etc., and can solve problems such as errors in measurement results of three-axis vector sensors

Active Publication Date: 2011-08-31
ZHONGBEI UNIV
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Problems solved by technology

However, the calibration compensation for the installation error between the three-axis vector sensor and the installation carrier is ignored, so that the installation error between the three-axis vector sensor and the installation carrier becomes the main reason for the error in the measurement results of the three-axis vector sensor in the carrier coordinate system

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  • Calibration and compensation method for mounting errors between triaxial vector sensor and mounting carrier
  • Calibration and compensation method for mounting errors between triaxial vector sensor and mounting carrier
  • Calibration and compensation method for mounting errors between triaxial vector sensor and mounting carrier

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Embodiment Construction

[0053] The method of the present invention will be further described below by taking the installation angle error between the calibration triaxial vector accelerometer and the installation carrier as an example:

[0054] Suppose the theoretical value of the gravitational acceleration measured by the three-axis vector accelerometer in the carrier coordinate system is However, the output value of the measured gravitational acceleration of the three-axis vector accelerometer in its own measurement coordinate system is Then there is the measured gravitational acceleration output value G m , theoretical value G b The relational formula:

[0055] G m =KG b (1-1)

[0056] i.e. G b =K -1 G m (1-2)

[0057] Among them, K is the installation error coefficient matrix, K -1 is the inverse matrix of the correction coefficient matrix-installation error coefficient matrix K;

[0058] The installation error coefficient matrix K is obtained by the following method:

[00...

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Abstract

The utility model relates to error correction of a vector sensor, in particular to a calibration and compensation method for mounting errors between a triaxial vector sensor and a mounting carrier, which calibrates and compensates the measuring result errors of the triaxial vector sensor due to mounting errors between the triaxial vector sensor and the mounting carrier. In the method, the calibration method for the mounting angle errors-psi angle, theta angle and gamma angle is as follows: a carrier coordinate system for a sealing shell of the triaxial vector sensor is calibrated; the mounting angle errors-psi angle, theta angle and gamma angle between the triaxial vector sensor and the mounting carrier is determined; the mounting angle error-psi angle between the triaxial vector sensor and the mounting carrier is determined; and a correction maths model aiming at the mounting angle errors between the triaxial vector sensor and the mounting carrier is finally determined according to the psi angle, theta angle and gamma angle obtained through calibration. The calibration and compensation method has simple correction process and accurate result, and is applied to the triaxial vector sensor with fixed measuring vectors in a measuring environment.

Description

technical field [0001] The invention relates to error correction of a vector sensor, in particular to a calibration compensation method for an installation error (mainly referring to an installation angle error) between a three-axis vector sensor and an installation carrier. Background technique [0002] With the advancement of modern science and technology, many military and industrial fields have higher and higher requirements for measurement accuracy, so simple and accurate instrument calibration technology is very important. For a three-axis vector sensor, the error of its measurement result is not only related to the static error of the three-axis vector sensor itself (such as: the zero offset error, sensitivity error, It is related to the installation error between the three-axis vector sensor, etc.), and is also related to the installation error between the three-axis vector sensor and the installation carrier; and the current research direction on the error correctio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D3/028G01B21/22
Inventor 张晓明刘俊高丽珍杨玉华李欣然陈国彬李永慧崔星
Owner ZHONGBEI UNIV
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