Next Article in Journal
A TSR Visual Servoing System Based on a Novel Dynamic Template Matching Method
Previous Article in Journal
Focusing Bistatic FMCW SAR Signal by Range Migration Algorithm Based on Fresnel Approximation
Article Menu

Export Article

Open AccessArticle
Sensors 2015, 15(12), 32138-32151; doi:10.3390/s151229911

Fatigue Crack Length Sizing Using a Novel Flexible Eddy Current Sensor Array

College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 22 October 2015 / Revised: 6 December 2015 / Accepted: 16 December 2015 / Published: 21 December 2015
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [8234 KB, uploaded 21 December 2015]   |  

Abstract

The eddy current probe, which is flexible, array typed, highly sensitive and capable of quantitative inspection is one practical requirement in nondestructive testing and also a research hotspot. A novel flexible planar eddy current sensor array for the inspection of microcrack presentation in critical parts of airplanes is developed in this paper. Both exciting and sensing coils are etched on polyimide films using a flexible printed circuit board technique, thus conforming the sensor to complex geometric structures. In order to serve the needs of condition-based maintenance (CBM), the proposed sensor array is comprised of 64 elements. Its spatial resolution is only 0.8 mm, and it is not only sensitive to shallow microcracks, but also capable of sizing the length of fatigue cracks. The details and advantages of our sensor design are introduced. The working principal and the crack responses are analyzed by finite element simulation, with which a crack length sizing algorithm is proposed. Experiments based on standard specimens are implemented to verify the validity of our simulation and the efficiency of the crack length sizing algorithm. Experimental results show that the sensor array is sensitive to microcracks, and is capable of crack length sizing with an accuracy within ±0.2 mm. View Full-Text
Keywords: flexible eddy current array; crack sizing; quantitative nondestructive evaluation; spatial resolution; high sensitive flexible eddy current array; crack sizing; quantitative nondestructive evaluation; spatial resolution; high sensitive
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Xie, R.; Chen, D.; Pan, M.; Tian, W.; Wu, X.; Zhou, W.; Tang, Y. Fatigue Crack Length Sizing Using a Novel Flexible Eddy Current Sensor Array. Sensors 2015, 15, 32138-32151.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top