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Three-axis magnetic sensor error correction method based on partitioned beetle antennae algorithm

An error correction and sensor technology, applied in the field of three-axis magnetic sensor error correction, can solve the problems of sensitivity error, non-orthogonal error, zero offset error, etc., and achieve the effect of improving global search ability and search ability.

Inactive Publication Date: 2021-04-30
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a three-axis magnetic sensor error correction method based on the divisional beetle whisker algorithm, which solves the problem of vector sensors such as fluxgate sensors in the manufacturing and assembly process due to process limitations. Introduced non-orthogonal error, sensitivity error and zero bias error

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  • Three-axis magnetic sensor error correction method based on partitioned beetle antennae algorithm
  • Three-axis magnetic sensor error correction method based on partitioned beetle antennae algorithm
  • Three-axis magnetic sensor error correction method based on partitioned beetle antennae algorithm

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specific Embodiment

[0079] In this embodiment, three error correction scenarios of the three-axis magnetic sensor under the condition of the geomagnetic background field are considered. Assuming that the total geomagnetic field strength Te is 50000nT, the non-orthogonal error parameters ψ, θ and Respectively 0.018, 0.021 and 0.013, the sensitivity error parameter k x 、k y 、k z set to [1.01 0.95 1.01] T , zero bias error parameter b x , b y , b z set to [10 -10 10] T nT.

[0080] So far, all simulation data preparations are completed. The concrete calculation process of the present invention is as follows:

[0081] 1. Construct geomagnetic matrix and measurement matrix based on the set parameters.

[0082] Construct the geomagnetic matrix based on 36 sets of randomly generated geomagnetic inclination I and declination D And introduce non-orthogonal, sensitivity, zero bias error parameters to get the measurement matrix The formula for constructing the geomagnetic matrix is:

[0083]...

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Abstract

The invention discloses a three-axis magnetic sensor error correction method based on a partitioned beetle antennae algorithm, and solves the problems of non-orthogonal errors, sensitivity errors and zero offset errors caused by process limitations in the manufacturing and assembling process of vector sensors such as fluxgate sensors. A model containing the three errors is established according to the physical significance of the errors, the relation between a magnetic induction intensity measured value and an actual value is obtained, and a correction model of the sensor is deduced according to the relation. An optimization algorithm is used for solving parameters of the correction model, so that correction parameters of the sensor can be obtained and corrected, and the three kinds of errors in measured values are effectively eliminated. According to the method, the concepts of populations and partitions are introduced into a traditional beetle antennae search algorithm, the global search capability is remarkably improved on the premise that the local search precision is guaranteed, the search capability for a high-dimensional target function is improved, correction parameters can be accurately and effectively solved, and correction work is completed.

Description

technical field [0001] The invention belongs to the technical field of voice recognition, and in particular relates to an error correction method for a three-axis magnetic sensor. Background technique [0002] Due to the limitations of the manufacturing process and the influence of installation errors, the data measured by the vector sensor inevitably contains non-orthogonal errors, sensitivity errors, and zero offset errors, which will affect the accuracy of the measured data. Therefore, it is extremely important to correct the above-mentioned errors before using the vector sensor for magnetic signal measurement. Document "H.Yu, S.Feng and W.Li-hua, "Synchronous correction of two-axis magnetometers using FLANN," Sensors and Actuators A: Physical, vol.179, pp.312-318, 2012." A linear error correction model is established, and the related parameters are solved by the method of linear neural network (LNN), and the correction work of the vector sensor is completed. In additio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00G06N3/00
CPCG01R35/005G06N3/006
Inventor 严胜刚李先刚刘建国
Owner NORTHWESTERN POLYTECHNICAL UNIV