Multiple cracks detection and visualization using magnetic flux leakage and eddy current pulsed thermography

被引：89

作者：

Gao, Yunlai ^{[1
,2
]}

Tian, Gui Yun ^{[1
,2
]}

Li, Kongjing ^{[2
]}

Ji, Juan ^{[1
]}

Wang, Ping ^{[1
]}

Wang, Haitao ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Automat Engn, Nanjing 210016, Jiangsu, Peoples R China

[2] Newcastle Univ, Sch Elect & Elect Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2015年 / 234卷

基金：

英国工程与自然科学研究理事会; 中国国家自然科学基金;

关键词：

Eddy current pulsed thermography; Magnetic flux leakage; Multiple cracks; Sensor arrays; Defect visualization; NONDESTRUCTIVE EVALUATION; DEFECT IDENTIFICATION; RAIL; SENSOR; ARRAY; NDE;

D O I：

10.1016/j.sna.2015.09.011

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper investigates two non-destructive evaluation methods, magnetic flux leakage (MFL) and eddy current pulsed thermography (ECPT), for both artificial and natural multiple cracks (MC) detection and visualization. The detection capability and characteristics of MC visualization are verified and compared through simulations and experiments. Results show that, MFL testing reflects the surface shapes and orientations of MC by 3D magnetic field imaging. However, it is unable to evaluate the depth of artificial MC and detailed surface shapes of natural MC due to limitations of sensor array spatial resolution. ECPT shows more capability in MC visualization in detail from thermal images. The obtained thermal image sequences from ECPT demonstrate rich transient and pattern information to evaluate MC geometrical features. After discussion of the two methods with the probability of detection (POD) analysis, a promising new sensing structure which potentially combines both advantages of them is proposed to enhance the NDE performance for MC evaluation. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：269 / 281

页数：13

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