Long Array of Microwave Sensors for Real-Time Coating Defect Detection

A real-time, inexpensive, and easy-to-install resonator-based microwave sensor array for coating defect detection on metallic structures is presented. The sensor array is composed of 55 identical rectangular spiral resonators coupled to a 120-cm-long transmission line. The array was simulated, fabri...

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Bibliographic Details
Published inIEEE transactions on microwave theory and techniques Vol. 68; no. 7; pp. 2856 - 2866
Main Authors Deif, Sameir, Daneshmand, Mojgan
Format Journal Article
LanguageEnglish
Published New York IEEE 01.07.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Capacitance
Coating
Coatings
Corrosion
Defects
detection
Microwave sensors
Monitoring
pipelines
Real time
Resonant frequencies
Resonators
sensor array
Sensor arrays
Sensors
spiral resonator
Spirals
stopband
structural health monitoring (SHM)
Transmission lines
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Summary:A real-time, inexpensive, and easy-to-install resonator-based microwave sensor array for coating defect detection on metallic structures is presented. The sensor array is composed of 55 identical rectangular spiral resonators coupled to a 120-cm-long transmission line. The array was simulated, fabricated, and measured. A stopband was created at the fundamental resonant frequency of the resonators. The fabricated sensor array was implemented on the coating to monitor defects beneath the sensor. The proposed sensor array can be used to detect water ingress and coating delamination, which are causes for alarm in metallic structure corrosion and cracking. The proposed structure is a low-cost solution for real-time coating failure identification.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2020.2973385