Regular octagonal gradient magnetic field coil

A regular octagon, gradient magnetic field technology, applied in the field of magnetic field coils, can solve the problems of loose coils and difficult coil processing, and achieve the effects of simple processing, complete linear gradients, and low processing difficulties.

Inactive Publication Date: 2014-06-18
710TH RES INST OF CHINA SHIPBUILDING IND CORP
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  • Abstract
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Problems solved by technology

[0003] In view of this, the present invention provides a regular octagonal gradient magnetic field coil, which generates a magnetic field with a complete linear gradient on the axis, which can solve the problem of calibrating the magnetic induction intensity of a dual-probe optical pump type, proton type, etc. gradient magnetometer. The difficulty of coil processing and the problem of coil loosening after long-term use

Method used

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Embodiment Construction

[0016] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0017] The present invention provides a regular octagonal gradient magnetic field coil, comprising two regular octagonal coils, the axes of the two regular octagonal coils are coincident and the current directions are opposite, such as figure 1 As shown, in practical applications, the two coils are usually realized by connecting two regular octagonal coils in series and reversely using one power supply.

[0018] Such as figure 2 Shown is a schematic diagram of one of the regular octagonal coils, wherein the vertical distance from the center of the regular octagonal coil to each side is a, and the side length of each side of the regular octagonal coil is b, which can be deduced from the geometric relationship

[0019] According to the Biot-Safar law, the magnetic induction intensity produced by any side of the regular octagonal coil with current I at po...

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Abstract

The invention discloses a regular octagonal gradient magnetic field coil, which comprises two regular octagonal coils, wherein the axes of the two regular octagonal coils are coined, and the current directions of the two regular octagonal coils are opposite. A magnetic field with complete linear gradient is formed on the axes, so the coil can solve the problems that the processing difficultly of the coil is high when double-probe optical pumping type and proton type gradient magnetometers are used for calibrating the magnetic induction strength, and the coil is loosened after being used for a long time.

Description

technical field [0001] The invention relates to a magnetic field coil, in particular to a regular octagonal gradient magnetic field coil capable of generating a uniform magnetic field gradient. Background technique [0002] Traditional gradient magnetic field generators generally use Helmholtz coils with opposite winding directions to generate gradient magnetic fields, and the size of the gradient magnetic field coil determines the area size of the uniform magnetic field gradient. In the case where it is necessary to calibrate the magnetic induction intensity of the optical pump type, proton type, etc. The volume of the magnetic field coil needs to be greatly increased to meet the requirements of use. However, when making large-scale coils, the circular coil frame is difficult to process, and when the square coil is wound, the coil winding is prone to loosening after long-term use due to uneven force on the wire. Contents of the invention [0003] In view of this, the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00H01F5/00
Inventor 宋新昌周鹰程华富李享张晓锋
Owner 710TH RES INST OF CHINA SHIPBUILDING IND CORP
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