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Method for testing triaxiality magnetic sensor

A test method and sensor technology, applied in the field of measurement, can solve problems such as large measurement errors, inability to overlap, and measurement errors, and achieve the effect of overcoming inaccurate placement and direction

Inactive Publication Date: 2007-12-26
NO 514 INST NO 5 ACADEMY CHINA AEROSPACE SCI & TECH
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AI Technical Summary

Problems solved by technology

However, there is still a lack of standards and specifications for the test of three-axis magnetic sensors in the prior art. An important issue affecting the test is that the three-axis magnetic sensor is a vector sensor, whether the measured value is accurate or not, and the position and direction of the magnetic sensor in the measurement. have a lot to do with
Even if the measurement angle deviation is 0.1 degrees, the vertical deviation of the magnetic sensor will reach 0.2%. In actual measurement, the position deviation is often in the range of a few degrees to more than ten degrees, and the measurement error is very large.
The vector magnetic field test system is a three-coordinate standard field generation system, and the magnetic sensor is also a three-coordinate system. Due to the deviation caused by placement, the two coordinate systems cannot overlap, resulting in measurement errors.

Method used

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  • Method for testing triaxiality magnetic sensor

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with embodiment.

[0013] The testing method of the three-axis magnetic sensor of the present invention comprises the following steps:

[0014] (1) Generate zero magnetic field space. Field weakening measurements need to be carried out in zero magnetic space. The so-called zero magnetic field space is a space in which the earth's magnetism is offset to zero by a certain method. Two methods are generally used to establish a zero magnetic space. One is to establish a coil system to offset the geomagnetism, and the other is to shield the geomagnetism by shielding. Both approaches have pros and cons. The present invention employs a coil system approach. The specific method is to use a digital meter to monitor the three output values ​​of the standard three-axis magnetic sensor, and adjust the zero magnetic field current so that the three-direction output values ​​of the standard three-axis magnetic sen...

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Abstract

A method for testing three-axis magnetic transducer includes generating zero magnetic field space, setting said transducer in said space, calculating out standard magnetic field values at three directions of tested three-axis magnetic transducer in sequence, utilizing obtained three field intensities to calculate standard value and making calibration on display value at three directions of three-axis magnetic transducer in sequence for obtaining test result.

Description

technical field [0001] The invention relates to measurement technology, in particular to a method for testing the magnetic field strength of a three-axis magnetic sensor in weak magnetic field vector measurement. Background technique [0002] With the advancement of science and technology and the development of modern industry, weak magnetic fields are used more and more widely in many industrial fields. Due to the continuous improvement of technical indicators for instruments and meters, the existing measurement standards can no longer meet the needs of modern technology development. In the measurement of weak magnetic fields (0.01nT ~ 100000nT), the three-axis magnetic sensor is widely used, and it is very important to accurately test the three-axis magnetic sensor in practical work. However, there is still a lack of standards and specifications for the test of three-axis magnetic sensors in the prior art. An important issue affecting the test is that the three-axis magnet...

Claims

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Application Information

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IPC IPC(8): G01R33/02
Inventor 赵晓光
Owner NO 514 INST NO 5 ACADEMY CHINA AEROSPACE SCI & TECH
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