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A near-field magnetic positioning method for a ring magnet

A magnetic positioning and magnet technology, applied in navigation calculation tools, ground navigation, etc., can solve the problems of large magnetic positioning results, inaccurate magnetic flux density distribution models of magnetic dipoles, and errors

Inactive Publication Date: 2019-02-05
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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Problems solved by technology

[0005] To sum up, for near-field magnetic positioning, the magnetic dipole magnetic flux density distribution model will be inaccurate, which will lead to large errors in the final magnetic positioning results. Therefore, it is necessary to study a near-field magnetic positioning method with high magnetic positioning accuracy

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  • A near-field magnetic positioning method for a ring magnet
  • A near-field magnetic positioning method for a ring magnet
  • A near-field magnetic positioning method for a ring magnet

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Embodiment Construction

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0048] A near-field magnetic positioning method for a ring magnet proposed by the present invention, its overall realization block diagram is as follows Figure 6 As shown, it includes the following steps:

[0049] ① Construct the magnet coordinate system OXYZ, then construct the integral model of the magnetic field distribution of the ring magnet in the magnet coordinate system OXYZ, and then use the integral model of the magnetic field distribution of the ring magnet to obtain the space point of the ring magnet on the plane YOZ (axial symmetry plane) The generated magnetic flux density vector, the specific process is:

[0050] ①_1. Taking the center point of the ring magnet as the origin, and taking the axial symmetry axis of the ring magnet as the Z axis, construct the magnet coordinate system OXYZ.

[0051] ①_2. Construct the integral mo...

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Abstract

The invention discloses a near-field magnetic localization method for a circular ring magnet. The method includes the steps that a magnetic field distribution integral model of the circular ring magnet is built in a magnet coordinate system OXYZ, and then the magnetic field distribution integral model of the circular ring magnet is used for obtaining the magnetic flux density vector generated by the circular ring magnet at the space point on the plane YOZ; the value of the magnetic flux density vector generated at any space point around the circular ring magnet in the magnet coordinate system OXYZ is calculated; a magnetic doublet magnetic flux density distribution model is used for calculating respective initial values of six pose parameters of the circular ring magnet in a word coordinate system; the magnet coordinate system OXYZ is built in the word coordinate system according to the initial values of six pose parameters of the circular ring magnet in the word coordinate system, and the respective final values of the six pose parameters of the circular ring magnet in the word coordinate system are obtained. The near-field magnetic localization method has the advantages that location precision is high during near-field magnetic localization, and calculation complexity of magnetic flux density is reduced.

Description

technical field [0001] The invention relates to a short-distance magnetic positioning technology, in particular to a near-field magnetic positioning method of a ring magnet uniformly magnetized along an axis. Background technique [0002] Magnetic positioning generally calculates the magnetic flux density around the magnet, and solves the position parameter and direction parameter of the magnet through the relationship between the position of the space point in the magnetic field of the magnet and the magnetic flux density around the magnet. The difficulty of magnetic positioning technology lies in the complexity of the magnetic flux density distribution model of the magnet. At present, a commonly used method is to use the magnetic dipole magnetic flux density distribution model to determine the position parameters and direction parameters of the magnet. Generally, the center point of the magnet is called the source point, and the magnetic flux density vector generated by th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/06G01C21/20
CPCG01C21/06G01C21/20
Inventor 胡超郭伟张智焕尤晓赫
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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