Three-axis magnetometer error correction technology based on self-adaptive genetic algorithm
A technology of error correction and genetic algorithm, applied in the direction of measuring devices, instruments, measuring electrical variables, etc., can solve the problems of high requirements for experimental operation and equipment, poor test operability, and inability to effectively reduce the size of the instrument system
Inactive Publication Date: 2014-06-25
卢兆兴
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[0004] The purpose of the present invention is to provide a three-axis magnetometer error correction technology based on an adaptive genetic algorithm, which solves the problem that the existing technology cannot effectively reduce the impact of the instrument system error on the expected output, and has high requirements for experimental operations and equipment. The problem of poor operability of the test
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Embodiment 1
[0071] Embodiment 1: Now take the FGM-2000 three-axis fluxgate sensor as the error correction object, and verify the correction method of this patent by carrying out correction experiments. The selected high-precision background field scalar measuring instrument is GSMP-35 high-precision optical pump magnetometer. The technical indicators of this instrument are shown in Table 1:
[0072] Table 1GSMP - 35 optical pump magnetometer technical index list
[0073]
[0074] *Note: This technical index is calibrated by China Metrology Institute
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The invention discloses the three-axis magnetometer error correction technology based on a self-adaptive genetic algorithm. The technology comprises the following steps; 1, analyzing the influence of non-orthogonality of three shafts on a measurement result in the working process of a three-axis magnetometer, and deriving an error correction formula of a three-axis vector sensor; 2, establishing an optimizing model for inherent error parameter identification of the three-axis magnetometer; 3, conducting identification and solving on an inherent error parameter in the optimizing model for inherent error parameter identification by utilizing a self-adaptive genetic algorithm to obtain a vector value of the inherent error parameter; 4, putting the vector value of the inherent error parameter of the three-axis vector sensor into the error correction formula of the three-axis vector sensor to achieve correction of a measurement error. The three-axis magnetometer error correction technology based on the self-adaptive genetic algorithm has the advantages that the influence of an instrument system error on expected output is effectively reduced, the requirement on experiment operation and instrument equipment is low, and reliability of an experiment is high.
Description
technical field [0001] The invention belongs to the technical field of electronic instrument measurement calibration and correction, and relates to a three-axis magnetometer error correction technology based on an adaptive genetic algorithm. Background technique [0002] In recent years, with the development of automatic control, engineering detection, and electronic technology, three-axis magnetometers have been widely used in many new fields such as geomagnetic navigation, and play an important role in the measurement and research of space magnetic fields. In actual measurement, to obtain complete and accurate geomagnetic field information, a strictly orthogonal three-axis magnetometer is required. Due to the limitations of the manufacturing process and installation process, the three measurement axes of the actual three-axis magnetometer are not strictly orthogonal, the sensitivity of each axis is inconsistent, and there are factors such as zero point offset, resulting in...
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IPC IPC(8): G01R35/00
Inventor 卢兆兴王仕成张金生乔玉坤蔡欣华
Owner 卢兆兴
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