励磁螺线管中的同轴铁管及其缺陷对轴线上磁场的影响

马凤翔, 储 薇, 王馨悦

doi:10.16854 / j.cnki.1000-0712.210298

大学物理 >

2021 , Vol. 40 >Issue 12: 15

DOI: https://doi.org/10.16854 / j.cnki.1000-0712.210298

教学讨论

励磁螺线管中的同轴铁管及其缺陷对轴线上磁场的影响

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北京林业大学理学院物理及电子系，北京 100083

马凤翔( 1970—) ，女，汉族，山西山阴县人，北京林业大学理学院物理与电子系副教授，博士，主要从事大学物理的教学研究工作. 　

收稿日期: 2021-06-20

修回日期: 2021-09-17

网络出版日期: 2021-12-14

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The influence of coaxial iron tube and its defects on axial magnetic field in excitation solenoid

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College of Science，Beijing Forestry University，Beijing 100083，China

Received date: 2021-06-20

Revised date: 2021-09-17

Online published: 2021-12-14

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摘要

本文在利用霍尔效应测量励磁螺线管磁场实验的基础上，通过在螺线管中放置同轴铁管来扩展磁场测量的实验内容.

实验表明处在励磁螺线管中的完好铁管，其内部磁场几乎为零，但是如果铁管存在材料缺陷，则可在相应的轴线位置上测到明显的漏磁信号.

这一扩展性实验不但加强了磁场测量的实验训练，也丰富了磁屏蔽和缺陷漏磁检测的基本实验技术.

关键词： 漏磁检测; 磁感应强度; 铁管

本文引用格式

马凤翔, 储薇, 王馨悦 . 励磁螺线管中的同轴铁管及其缺陷对轴线上磁场的影响[J]. 大学物理, 2021 , 40(12) : 15 . DOI: 10.16854 / j.cnki.1000-0712.210298

Abstract

On the basis of Hall effect measurement of magnetic field in excitation

solenoid，the experimentalcontent of magnetic field measurement was expanded in this article by placing an iron tube

coaxially in solenoid. Ex-perimental result showed that the intact iron tube in excitation solenoid hac almost

zero internal magnetic field. However，if the iron tube had material defects，an obvious magnetic

leakage signal could be measured at the corre- sponding axis position. This extended experiment

not only strengthens the experimental training of magnetic field measurement，but also enriches the basic experimental techniques of magnetic shielding and defect magnetic flux leakage detection.

Key words： magnetic flux leakage detection; magnetic induction; iron tube

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