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Pulsed magnetic field measurement method based on point coil

A pulsed magnetic field and measurement method technology, applied in the direction of the size/direction of the magnetic field, can solve problems such as difficult to popularize and use, complex winding process, etc., achieve high precision and stability, and reduce measurement errors

Inactive Publication Date: 2014-06-11
PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The spherical detection coil is an ideal "point" coil, but it is difficult to be widely used due to its complicated winding process

Method used

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  • Pulsed magnetic field measurement method based on point coil
  • Pulsed magnetic field measurement method based on point coil
  • Pulsed magnetic field measurement method based on point coil

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Embodiment Construction

[0023] figure 1 is the structural schematic diagram of a cylindrical "point" coil: where, D 1 is the inner diameter of the coil, D 2 is the outer diameter of the coil, and l is the length of the coil along the direction of magnetic induction. When the inner diameter of the coil is small, the conditions for the geometry of the "point" coil can be rewritten as:

[0024] l D 2 = 3 20 = 0.670

[0025] For thin-layer coils, there is D 1 ≈D 2 ≈D, the conditions satisfied by the "point" coil geometry can be rewritten as:

[0026] l / D 2 = 3 20 [ 1 - ( D ...

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Abstract

The invention provides a pulsed magnetic field measurement method based on a point coil. Through the method, measurement error caused by unevenness of a measured magnetic field can be effectively reduced. The measurement method is based on an electromagnetic induction method based on the Faraday's law of electromagnetic induction, a single-layer cylindrical detection coil designed with set geometric dimensions is adopted so as to approach physical characteristics of the point coil, the induced electromotive force of the magnetic field in the coil is measured with a fixed coil method, and the measured induced electromotive force is integrated by time and then divided by the coil constant to obtain the waveform of the magnetic field to be measured. The pulsed magnetic field measurement method is easy and convenient to operate, good in stability and capable of providing technical support for accurate evaluation of lightening return stroke magnetic fields.

Description

technical field [0001] The invention provides a pulse magnetic field measurement method based on point coils. This method can be applied to the measurement and evaluation of the lightning return magnetic field environment. Background technique [0002] With the rapid development of information technology, the electromagnetic susceptibility of various electronic equipment is getting higher and higher. As a typical hazard source, the lightning electromagnetic pulse generated by the lightning return is increasing year by year. In order to test the electromagnetic protection capability of electronic and electrical equipment, it is urgent to conduct safety tests on the relevant electromagnetic sensitive products in the lightning electromagnetic environment. Make an accurate assessment. [0003] There are many measurement methods of pulsed magnetic field. The pulsed magnetic field sensor based on the Faraday magneto-optic effect has the advantages of small size, good sensitivity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/02
Inventor 陈亚洲王晓嘉万浩江杜磊程二威关闯
Owner PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE