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A Calibration Method of Single-axis Fluxgate Sensor Parameters

A technology of fluxgate sensor and calibration method, which is applied in the direction of instruments, measuring devices, measuring electric variables, etc., can solve the problems of complicated calibration process and low calibration accuracy of single-axis fluxgate sensor parameters, and achieve simple calibration process and high parameter accuracy. The effect of high precision and high calibration precision

Active Publication Date: 2017-02-15
南京云磁电子科技有限公司
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for calibrating the parameters of a single-axis fluxgate sensor, which solves the defects of the existing single-axis fluxgate sensor parameter calibration accuracy is not high and the calibration process is complicated

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  • A Calibration Method of Single-axis Fluxgate Sensor Parameters
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  • A Calibration Method of Single-axis Fluxgate Sensor Parameters

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0022] Such as Figure 1-Figure 3 As shown, a method for calibrating parameters of a uniaxial fluxgate sensor 3, the uniaxial fluxgate sensor 3 is composed of a probe 31 and a signal processing board 32, and the calibration method includes the following steps:

[0023] Step 1. Select the measurement site where the JJP-2 calibration station 1 is placed. The measurement site generally chooses parks, playgrounds, etc. with little external magnetic interference; use the earth's magnetic field model, and calculate the day's measurement according to the longitude and latitude of the measurement site and the measurement time. The values ​​of the three components of the geomagnetic field at the location of the earth. For example, taking the location at an altitude of 20 meters, 31°15′16 north latitude and 121°22′18 east longitude as the measurement site, ...

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Abstract

The invention relates to a method for calibration of parameters of a single-axis fluxgate sensor and belongs to the field of low-intensity magnetic field detection. The method for calibration of the parameters of the single-axis fluxgate sensor comprises the steps that the vertical component MZ of the ground magnetic field intensity of a measured position through an earth magnetic field model, the output voltage V1 generated when the direction of the sensitive axis of the single-axis fluxgate sensor is consistent with the direction of gravitational acceleration is collected, the output voltage V2 generated when the direction of the sensitive axis of the single-axis fluxgate sensor is opposite to the direction of gravitational acceleration is collected, the MZ, the V1 and the V2 are introduced into a computational formula, namely M=K*V+M0, which represents the linear relation between the output voltage of the single-axis fluxgate sensor and the magnetic induction intensity, so that two equations, namely MZ=K*V1+M)) and -MZ=K*V2+M0 are obtained, and finally the linear coefficient K and the zero deviation M0 of the single-axis fluxgate sensor are obtained. By the adoption of the method for calibration of the parameters of the single-axis fluxgate sensor, requirements for equipment are not high, the calibration process is simple, and the calibration precision is high.

Description

technical field [0001] The invention relates to a single-axis fluxgate sensor, in particular to a calibration method for parameters of the single-axis fluxgate sensor. Background technique [0002] The single-axis fluxgate sensor uses the high-permeability core in the measured magnetic field to undergo periodic saturation and non-saturation changes under the excitation of the alternating signal, so that the induction coil around the core induces a signal that reflects the external magnetic field , where even harmonics have a linear relationship with the external magnetic field, that is, M=K*V+M 0 , where M is the magnetic induction intensity, V is the output voltage of the uniaxial fluxgate sensor, K is the linear coefficient of the uniaxial fluxgate sensor, M 0 is the zero point deviation of the single-axis fluxgate sensor. It can be seen that only the linear coefficient K and zero point deviation M of the single-axis fluxgate sensor are clarified 0 , to accurately measu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/00
Inventor 胡杰张琳
Owner 南京云磁电子科技有限公司
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