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| 一种新型涡流检测法及其检测效果 | |
| 引用本文： | 王勃,胡冲,王杰,王月宇,李宁. 一种新型涡流检测法及其检测效果[J]. 中国冶金, 2021, 31(2): 50-54. DOI: 10.13228/j.boyuan.issn1006-9356.20200350 |
| 作者姓名： | 王勃 胡冲 王杰 王月宇 李宁 |
| 作者单位： | 1.运城学院机电工程系, 山西 运城 044000; 2.钢铁研究总院冶金工艺研究所, 北京 100081; 3.运城学院图书馆, 山西 运城 044000; 4.包头铁道职业技术学院机械工程系, 内蒙古 包头 010010 |
| 基金项目： | 运城学院博士科研启动资助项目(YQ-2019005);优秀博士来晋科研专项资助项目(QZX-2019010);山西省科技重大专项资助项目(20201102003) |
| 摘 要： | 涡流检测法是非常常用的金属材料缺陷检测的无损检测方法,为了改进传统涡流检测法难以微型化的不足,提出了一种新型涡流检测法,分别用小永磁体和高精度磁传感器代替了传统涡流检测法的激励线圈和接受线圈.通过试验和数值模拟相结合的研究方法,对新型涡流检测法的原理及检测效果进行了研究.结果表明,新型涡流检测法的检测原理可行,检测装置... |
| 关 键 词： | 金属材料 缺陷 涡流检测 永磁体 磁场传感器 |
A new eddy current testing method and its testing effect |
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| WANG Bo,HU Chong,WANG Jie,WANG Yue-yu,LI Ning. A new eddy current testing method and its testing effect[J]. China Metallurgy, 2021, 31(2): 50-54. DOI: 10.13228/j.boyuan.issn1006-9356.20200350 | |
| Authors: | WANG Bo HU Chong WANG Jie WANG Yue-yu LI Ning |
| Affiliation: | 1. Department of Mechanical and Electrical, Yuncheng University, Yuncheng 044000, Shanxi, China; 2. Metallurgical Technology Institute, Central Iron and Steel Research Institute, Beijing 100081, China; 3. Library Department, Yuncheng University, Yuncheng 044000, Shanxi, China; 4. Department of Mechanical, Baotou Railway Vocational and Technical College, Baotou 010010, Nei Mongol, China |
| Abstract: | The Eddy Current Testing (ECT) method is one of the most commonly used nondestructive testing method for defect detection of metal materials. In this paper, a new ECT method was proposed for improving the shortcomings of the traditional ECT method, which is difficult to miniaturize. The excitation and testing coil of the traditional ECT method were replaced by a small permanent magnet and a high-precision magnetic sensor, respectively. The principle and testing effect of the new ECT method were investigated by using experimental and numerical simulation method. The results show that the principle of the new ECT method is feasible, the device is simple and the testing accuracy is higher. Defects with diameter of 50 μm could be detected under the present paper. The component of the induced magnetic field in the direction of conductor movement and the magnetization direction of the permanent magnet exhibited symmetric negative pulse and sinusoidal changes, respectively. The optimal moving velocity of conductor and lift-off distance should be several m/s and 0.2 mm. |
| Keywords: | metallic material defect eddy current testing permanent magnet magnetic sensor |
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