Magnetometer array correction method

Abstract

A magnetometer array correction method comprises steps: S1: establishing a magnetometer error model; S2: performing multi-time rotation or movement of a magnetometer array, and collecting data of eachmagnetometer every time after rotation or movement; S3: selecting one magnetometer as a reference magnetometer in the magnetometer array; S4: employing the magnetometer error model and the collecteddata to calculate relative error coefficients between the reference magnetometer and other magnetometers; S5: employing the magnetometer error model and the collected reference magnetometer data to calculate an error coefficient of the reference magnetometer; and S6: substituting the relative error coefficient and the error coefficient of the reference magnetometer into the error model and the collected data for completion of correction. The magnetometer array correction method can correct errors of a whole system itself only by using the data collected by the magnetometer array itself with noneed for external device references so as to improve work efficiency in a field environment and an unmanned operation environment.

Description

technical field [0001] The invention relates to the technical field of magnetometer measurement, in particular to a method for calibrating a magnetometer array. Background technique [0002] Compared with the traditional scalar magnetometer array system, the vector magnetometer array system can detect more abundant target information, and has many applications in civil and military fields, such as geological survey, unexploded bomb detection, underwater magnetic target tracking, etc. Since the 1990s, several research institutes including the Jena Institute of High Technology for Physics in Germany and the Australian Commonwealth Scientific and Industrial Research Organization have successively used superconducting quantum interferometers to build magnetic gradient tensor measurement systems and conducted a series of experiments. This type of instrument system has high resolution and precision. However, superconducting quantum interferometers are too expensive, bulky, and ne...

AI Technical Summary

Problems solved by technology

It is worth noting that the above articles all use external equipment to calibrate the magnetometer array. This method has the following problems: (1) increases the cost of the calibration system; (2) increases the power consumption of the entire system, which is not conducive to autonomous vehicles The application of long-term detection; (3) The accuracy of the calibration system itself is easily interfered by the carrier platform (shipboard, vehicle, etc.), and it is necessary to compensate the calibration system itself first, which increases the complexity of the overall calibration, which is not conducive to unmanned Operate on the platform

Use external equipment to correct the magnetic gradient tensor system, the complexity of the correction system limits the efficiency of the operation

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