一种用于检测、定位和评估金属表面缺口型损伤的叉指电极探头。

An Interdigital Electrode Probe for Detection, Localization and Evaluation of Surface Notch-Type Damage in Metals.

作者信息

Li Lanshuo, Yang Xiaoqing, Yin Yang, Yuan Jianping, Li Xu, Li Lixin, Huang Kama

机构信息

School of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China.

National Key Laboratory of Aerospace Flight Dynamics, Northwestern Polytechnical University, Xi'an 710129, China.

出版信息

Sensors (Basel). 2018 Jan 27;18(2):371. doi: 10.3390/s18020371.

DOI:10.3390/s18020371

PMID:29382063

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5855216/

Abstract

Available microwave notch-type damage detection sensors are typically based on monitoring frequency shift or magnitude changes. However, frequency shift testing needs sweep-frequency data that make scanning detection becomes difficult and time-consuming. This work presents a microwave near-field nondestructive testing sensor for detecting sub-millimeter notch-type damage detection in metallic surfaces. The sensor is loaded with an interdigital electrode element in an open-ended coaxial. It is simple to fabricate and inexpensive, as it is etched on the RC4003 patch by using printed circuit board technology. The detection is achieved by monitoring changes in reflection amplitude, which is caused by perturbing the electromagnetic field around the interdigital structure. The proposed sensor was tested on a metallic plate with different defects, and the experimental results indicated that the interdigital electrode probe can determine the orientation, localization and dimension of surface notch-type damage.

摘要

现有的微波缺口型损伤检测传感器通常基于监测频率偏移或幅度变化。然而，频移测试需要扫频数据，这使得扫描检测变得困难且耗时。这项工作提出了一种用于检测金属表面亚毫米级缺口型损伤的微波近场无损检测传感器。该传感器在开放式同轴电缆中加载了叉指电极元件。它易于制造且成本低廉，因为它是通过印刷电路板技术蚀刻在RC4003贴片上的。通过监测反射幅度的变化来实现检测，这种变化是由叉指结构周围的电磁场扰动引起的。所提出的传感器在具有不同缺陷的金属板上进行了测试，实验结果表明叉指电极探头可以确定表面缺口型损伤的方向、位置和尺寸。