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A method and device for measuring the angle between axes of a three-component magnetometer

A three-component magnetic and magnetometer technology, used in measuring devices, instruments, etc., can solve the problems of inability to meet high-precision requirements, poor stability of the three-axis angle, and difficult operation, and achieve simple structure, high precision, and operation. strong effect

Inactive Publication Date: 2018-01-19
BEIJING XINWEI TELECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In order to make the three axes of the three-axis magnetometer meet the requirements of orthogonality, the existing technology usually includes: Method 1, the mechanical positioning method of three-axis fixation, which has the advantage of stabilizing the included angle of the three axes, but this method can only make the three-axis The orthogonality reaches about 2°, which is far from meeting the high-precision requirements; 2. Method 2: The mechanical positioning method with fine-tuning of the three-axis angle has the advantage of being able to meet the high orthogonality requirements, but this method takes a long time to adjust. The equipment is complicated, the operation is difficult, and the stability of the obtained three-axis angle is poor

Method used

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  • A method and device for measuring the angle between axes of a three-component magnetometer
  • A method and device for measuring the angle between axes of a three-component magnetometer
  • A method and device for measuring the angle between axes of a three-component magnetometer

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Embodiment 1

[0044] The measured magnetometer of this embodiment has been mechanically positioned in advance, and the non-positive angle between each axis is less than 2 degrees. The specific method steps for measuring the included angle between the axes are as follows:

[0045] a, make the z-axis of the measured magnetometer perpendicular to the direction of the geomagnetic vector;

[0046] b. Rotate the entire measured magnetometer around the z-axis, so that the y-axis reading changes from a negative value to zero, and record the rotation angle α of the measured magnetometer at this time 1 , And then continue to rotate to make the x-axis reading change from negative to zero, and record the rotation angle α of the measured magnetometer at this time 2 , Calculate the phase difference between x-axis and y-axis as α 2 -α 1 , This value can be used as the angle between the x-axis and the y-axis of the measured magnetometer, of course, other existing methods different from this embodiment can also be...

Embodiment 2

[0050] This embodiment describes a device for measuring the angle between the axes of a three-component magnetometer, such as image 3 Shown. The device is made of non-magnetic materials and includes: a base 1, a horizontal turntable 2, a horizontal axis 3, an angle sensor 4, a fixing plate 5, an adjusting plate 6 and three fine-tuning screws 7, and the position of the base 1 is fixed , The horizontal turntable 2 is installed on the base 1 and can rotate horizontally relative to the base 1; the horizontal axis 3 is installed on a fixed position of the horizontal turntable 2, and the axis is parallel to the plane of the horizontal turntable 2, and the horizontal axis 3 can rotate around its axis; The sensor 4 is installed on the horizontal axis 3 to measure the rotation angle of the horizontal axis 3; the fixed plate 5 is fixedly installed on the horizontal axis 3; the adjusting plate 6 is used to fix the measured magnetometer 8, through the fine adjustment screw 7 and the fixed ...

Embodiment 3

[0052] In this embodiment, the device described in the second embodiment is used to measure the angle between the axes of the three-component magnetometer. The specific steps are as follows:

[0053] 1. In order to rotate the z-axis, it is necessary to make the z-axis of the measured magnetometer coincide with the central axis of the horizontal axis, in the z-axis and the geomagnetic vector direction B e When it is roughly vertical, if the z-axis reading does not change when the horizontal axis 3 is rotated, it can be determined that the z-axis and the central axis coincide. In this step, first adjust the z-axis to be perpendicular to the direction of the geomagnetic vector: fix the base 1 and install the measured magnetometer 8 on the adjustment plate 6 so that the z-axis of the measured magnetometer 8 is roughly parallel to the horizontal axis 3. Turn the horizontal turntable 2 so that the z-axis reading of the measured magnetometer 8 does not exceed 100nT (at this time the z-a...

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Abstract

The invention provides a method and a device for measuring included angles between axes of a three-component magnetometer, wherein the method is suitable for a measured magnetometer in which each interaxial non-positive angle is smaller than 2 DEG. The method comprises the steps of a, making the z-axis of the measured magnetometer be perpendicular with the direction of a geomagnetic vector; b, rotating the whole measured magnetometer rotate around the z-axis, obtaining a phase difference between an x-axis and a y-axis according to the read number of the x-axis and the y-axis and the rotation angle of the measured magnetometer, and taking the phase difference as the included angle between the x-axis and the y-axis of the measured magnetometer; c, replacing the z-axis and the y-axis in the steps a and b with each other, repeating the steps a and b, thereby obtaining an included angle between the x-axis and the z-axis of the measured magnetometer; and d, replacing the z-axis and the x-axis in the steps a and b with each other, and repeating the steps a and b, thereby obtaining the included angle between the y-axis and the z-axis of the measured magnetometer. The method and the device of the invention can quickly measure the values of the included angles between axes and furthermore have advantages of simple measurement process, short time and high precision.

Description

Technical field [0001] The invention relates to the field of instrument measurement, in particular to a method and device for measuring the angle between the shafts of a three-component magnetometer. Background technique [0002] In order to make the three axes of the three-axis magnetometer meet the orthogonal requirements, the prior art usually includes: Method 1, the mechanical positioning method of three-axis fixed, its advantage is that the three-axis angle is stable, but this method can only make the three-axis non The orthogonality reaches about 2°, which is far from meeting the high-precision requirements; 2. Method 2: The mechanical positioning method with finely adjustable three-axis included angles has the advantage of being able to meet the requirements of high orthogonality, but this method takes a long time to adjust. The equipment is complex, the operation is difficult, and the obtained three-axis included angle stability is poor. 3. Method 3: Accurately measure t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/22
CPCG01B21/22
Inventor 成献礼
Owner BEIJING XINWEI TELECOM TECH