已知深度范围缺陷的选频带脉冲涡流检测方法

中国机械工程

已知深度范围缺陷的选频带脉冲涡流检测方法

赵莹;解社娟;田明明;仝宗飞;李勇;陈振茂

机械结构强度与振动国家重点实验室，陕西省无损检测结构完整性评价工程技术中心，西安交通大学，西安，710049

出版日期:2018-03-25 发布日期:2018-03-21
基金资助:
国家自然科学基金资助项目（51407132, 51277139, 51577139）；
中央高校基本科研业务费专项资金资助项目
National Natural Science Foundation of China （No. 51407132, 51277139, 51577139）
Fundamental Research Funds for the Central Universities

Frequency-band-selecting Pulsed Eddy Current Testing Method for Detection of Defects under a Certain Depth Range

ZHAO Ying;XIE Shejuan;TIAN Mingming;TONG Zongfei;LI Yong;CHEN Zhenmao

State Key Laboratory for Strength and Vibration of Mechanical Structures,Shaanxi Engineering Research Center of Nondestructive Testing and Structural Integrity Evaluation,Xi'an Jiaotong University,Xi'an，710049

Online:2018-03-25 Published:2018-03-21
Supported by:
National Natural Science Foundation of China （No. 51407132, 51277139, 51577139）
Fundamental Research Funds for the Central Universities

摘要/Abstract

摘要： 为进一步提高对一定深度范围的局部减薄缺陷的检测能力，提出了选频带脉冲涡流检测方法。介绍了选频带脉冲涡流的工作原理，说明了选频带脉冲涡流激励信号的选取原则，比较了传统方波脉冲涡流与选频带脉冲涡流对一定深度范围的局部减薄缺陷的检测灵敏度，并考察了选频带脉冲涡流的提离交叉点特征。数值实验结果表明：对于一定深度范围的局部减薄缺陷，选频带脉冲涡流比传统方波脉冲涡流检测灵敏度更高，且选频带脉冲涡流提离交叉点的特征能反映出缺陷深度。

关键词: 频率, 选频带脉冲涡流检测, 检测灵敏度, 提离交叉点

Abstract: To further improve the detectability of local wall thinning defects under certain depth ranges, a FSPECT method was proposed. The principles of FSPECT method were introduced. The way of selecting the excitation signals of FSPECT was described in detail. The detection sensitivities of local wall thinning defects under certain depth ranges of the traditional square wave PECT and FSPECT were compared. The lift-off intersection point of FSPECT was investigated. The numerical experimental results show that the sensitivity of FSPECT is higher than that of the traditional PECT for testing local wall thinning defects under certain depth ranges. The lift-off intersection point of FSPECT may reflect the depth of local wall thinning defects.

Key words: frequency, frequency-band-selecting pulsed eddy current testing(FSPECT), detection sensitivity, lift-off intersection point

中图分类号:

TG115.28

赵莹;解社娟;田明明;仝宗飞;李勇;陈振茂. 已知深度范围缺陷的选频带脉冲涡流检测方法[J]. 中国机械工程.

ZHAO Ying;XIE Shejuan;TIAN Mingming;TONG Zongfei;LI Yong;CHEN Zhenmao. Frequency-band-selecting Pulsed Eddy Current Testing Method for Detection of Defects under a Certain Depth Range[J]. China Mechanical Engineering.

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