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A multi-layer three-dimensional magnetic field transmitting coil

A three-dimensional magnetic field, transmitting coil technology, applied in the direction of coils, electrical components, circuits, etc., can solve the problems of permeability change, iron core hysteresis, temperature rise, etc., to improve positioning accuracy, expand positioning range, and improve positioning speed. Effect

Inactive Publication Date: 2018-06-19
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the DC pulse excitation signal will generate eddy current loss inside the iron core, which will increase the temperature of the iron core during operation and change the magnetic permeability. Secondly, there is a magnetic hysteresis in the iron core
These factors will cause large errors when using the magnetic dipole model to describe the emitted magnetic field

Method used

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  • A multi-layer three-dimensional magnetic field transmitting coil
  • A multi-layer three-dimensional magnetic field transmitting coil

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Embodiment

[0018] refer to figure 1 , figure 2 , Wide-range three-layer square magnetic field emission device. It is formed by nesting three layers of square hollow coils. The three layers of coils are concentric and have the same axial direction. Each layer of coils is composed of two mutually perpendicular and concentric three-axis coils. Enameled wire with a nominal diameter of copper wire of 0.49mm is used. As the winding of the coil, the excitation current was set to 2A at the maximum. The skeleton is made by 3D printing, and each vertex of the skeleton is designed with fixed feet, which are used to wind the coil and fix the relative position of each layer.

[0019] The specific production process is as follows:

[0020] 1) Process the first layer of coils. Design and print the first layer of the skeleton. The coil width is 3cm. The X-axis, Y-axis, and Z-axis coils are wound in sequence. The number of turns of each axis coil is 120 turns, and each axis coil leads to an excitati...

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Abstract

The invention discloses a multi-layer three-dimensional magnetic field transmitting coil, which is used for a wide-range DC magnetic field tracking and positioning system. The multi-layer three-dimensional magnetic field transmitting coil is formed by coaxially and concentrically nesting multiple layers of hollow coils which are the same in shape, different in diameter and different in number of turns, wherein each layer of coil is formed by winding triaxial enamelled wires which are mutually vertical two by two and are concentric on a skeleton; the radius of each layer of coil gradually increases from inside to outside; and the skeleton is used for winding the coils and fixing the relative position of each layer. Therefore, the proper number of layers of the coils, and the radius, the number of turns and the exciting current magnitude of each layer of coil can be designed according to the range required by positioning; a transmitting magnetic field of the multi-layer three-dimensional magnetic field transmitting coil is in a tracking range; the multi-layer three-dimensional magnetic field transmitting coil can be approximated as a magnetic dipole model and can obtain relatively high magnetic field intensity; and a measurement error is reduced while calculation is facilitated.

Description

Technical field: [0001] The invention relates to a magnetic field generating device, in particular to a multi-layer three-dimensional magnetic field transmitting coil for a magnetic field tracking and positioning system. Background technique: [0002] The DC magnetic tracking positioning technology uses the DC excitation coil as the magnetic field emission source, and obtains the real-time position and attitude information of the tracking target according to the magnetic field information. [0003] Most of the traditional transmitting coils are air-core coils made of enameled wire wound on a spherical or cubic skeleton, driven by pulsed DC, and generate a pulsed DC magnetic field in space. However, due to the low frequency of the DC signal, the positioning distance of the system will inevitably be short. If the positioning distance is increased, the radius of the transmitting coil must be increased, but only when the distance r between the tracking object and the transmitti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F5/00
CPCH01F5/00
Inventor 刘诗斌杨雪谷亚维
Owner NORTHWESTERN POLYTECHNICAL UNIV