CAJ | 학술논문

对于工业架空管道检测，若采用目前广泛应用的轴向磁化漏磁检测方法，管道规格繁多造成探头规格多样，不利于现场操作。为解决这一问题，本文提出将周向磁化漏磁检测应用于工业管道检测，周向磁化漏磁检测的核心是磁化器设计。为优化便携式周向磁化漏磁检测磁化器设计，采用三维有限元方法，仿真研究周向磁化下管道磁化场分布特征，分析磁铁厚度与宽度、衔铁厚度、磁极间距、磁铁提离等参数对管道磁化场分布影响，得到探头下方管道磁感应强度大小及磁化均匀区域大小随磁化器几何尺寸和磁铁提离的变化规律，并通过实验对设计的磁化器进行验证，结果表明通过有限元仿真得到的磁化器满足检测要求。
대우공업가공관도검측，약채용목전엄범응용적축향자화루자검측방법，관도규격번다조성탐두규격다양，불리우현장조작。위해결저일문제，본문제출장주향자화루자검측응용우공업관도검측，주향자화루자검측적핵심시자화기설계。위우화편휴식주향자화루자검측자화기설계，채용삼유유한원방법，방진연구주향자화하관도자화장분포특정，분석자철후도여관도、함철후도、자겁간거、자철제리등삼수대관도자화장분포영향，득도탐두하방관도자감응강도대소급자화균균구역대소수자화기궤하척촌화자철제리적변화규률，병통과실험대설계적자화기진행험증，결과표명통과유한원방진득도적자화기만족검측요구。
The axial magnetization is the main magnetization method nowadays, which means that the probe speciifcation is changed with the change of the industry pipeline speciifcation. It is inconvenient in the ifeld. To solve the problem, the magnetic lfux leakage testing based on circumferential magnetization is applied to test of industrial pipelines. The design of the magnetizer is the key of the magnetic flux leakage testing based on circumferential magnetization. In order to optimize it, the distribution of magnetic induction ifeld in pipelines under circumferential magnetization is simulated and studied based on 3D ifnite element analysis. The inlfuences of magnetizer parameters, such as the thickness and width of the magnet, the thickness of the armature, and the pole spacing, are analyzed; and the correlation curves of magnetic induction below the pipe detection probe and the size of the uniform magnetization region which changing with the magnetizer parameters and the magnets lift-off are obtained. The magnetization designed by the finite element method is verified by experiments, and the experiments show that the magnetizer satisifes detection requirements.