带有电涡流仪器的疲劳裂纹检测在线检测工具。

In-Line Inspection Tool with Eddy Current Instrumentation for Fatigue Crack Detection.

机构信息

Laboratory of Nondestructive Testing, Corrosion and Welding, Federal University of Rio de Janeiro, Rio de Janeiro 21941-596, Brazil.

Metallurgy and Materials Department, Federal University of Rio de Janeiro, Rio de Janeiro 21941-596, Brazil.

出版信息

Sensors (Basel). 2018 Jul 5;18(7):2161. doi: 10.3390/s18072161.

DOI:10.3390/s18072161

PMID:29976845

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6069063/

Abstract

Eddy current transducer with sensing coils placed orthogonally and connected in differential mode was introduced to evaluate fatigue cracks in clad pipeline circumferential welds. A dedicated embedded electronic hardware was developed to drive the transducer and measure the electrical complex impedance of the coils, and was specifically designed for operation under autonomous in-line inspection tool. In the laboratory experiments, an automated inspection was performed with the goal to evaluate transducer’s detectability, and different scanning speed was tested to reproduce in service situation. The results have confirmed that the introduced eddy current transducer is a potential solution for fatigue crack detection in clad circumferential weld root, while the hardware developed presented a reasonable SNR reaching the data rate required to be incorporated in an autonomous in-line inspection tool.

摘要

介绍了一种带有正交放置的感应线圈并以差分模式连接的涡流传感器，用于评估复合管道环焊缝中的疲劳裂纹。专门开发了一种嵌入式电子硬件来驱动传感器并测量线圈的电复阻抗，并专门设计用于自主在线检测工具的操作。在实验室实验中，进行了自动化检测，目的是评估传感器的检测能力，并测试了不同的扫描速度以再现实际使用情况。结果证实，所介绍的涡流传感器是检测复合环焊缝根部疲劳裂纹的一种有潜力的解决方案，而开发的硬件则具有合理的 SNR，达到了纳入自主在线检测工具所需的数据速率。