Calibration compensation method for triaxial vector sensor and biaxial vector sensor

Abstract

The invention relates to error correction of a vector sensor, in particular to a calibration compensation method for a triaxial vector sensor and a biaxial vector sensor, and solves the problems that the calibration compensation method of the existing multi-axial vector sensor fails to take all factors causing measurement error into account and the like. In the method, an error correction mathematical model of the vector sensor is built according to the relation of actually measured output Sm and theoretical output Se of the vector sensor, i.e. Sm=KSe + S0 and according to an error coefficient matrix K=K1K2, wherein, K1 and K2 are respectively a sensitivity error coefficient matrix of the triaxial vector sensor and a non-orthogonal error coefficient matrix among three measured axes; and an effective method is utilized to obtain correct zero-offset S0 and a correction coefficient matrix K-1 in the error correction mathematical model, and finally the error correction mathematical model of the measured vector sensor is obtained to carry out calibration compensation on the measuring result of the vector sensor. The method achieves calibration compensation taking into account of all the factors causing the measurement error of the multi-axial sensor, thus improving the accuracy of measuring results; and the method has concise and convenient process and no excessively high requirements on hardware equipment, thus being suitable for various vector sensors.

Description

technical field The invention relates to error correction of a vector sensor, in particular to a calibration compensation method for a three-axis vector sensor and a two-axis vector sensor. Background technique With the advancement of modern science and technology, many industrial fields have higher and higher requirements for measurement accuracy, so simple and accurate instrument calibration technology is very important. For a multi-axis vector sensor (generally refers to a three-axis vector sensor and a two-axis vector sensor), the accuracy of its measurement results is related to the zero offset error, sensitivity error, and The installation error is related; among them, the installation error of each single-axis sensor causes the measurement axis of each single-axis sensor to be non-orthogonal (the angle between the measurement axis of the single-axis sensor and the coordinate axis of the orthogonal coordinate system is generally between tens to several degrees. Betwee...

AI Technical Summary

Problems solved by technology

In order to solve the problems that the existing multi-axis vector sensor calibration compensation method does not take into account all the factors causing the measurement error, and the method is complicated, difficult to implement, and has high requirements for equipment, it provides a simple correction process and accurate correction results. Calibration compensation method of three-axis vector sensor and two-axis vector sensor

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