{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,20]],"date-time":"2025-12-20T22:14:06Z","timestamp":1766268846854,"version":"build-2065373602"},"reference-count":45,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2017,12,12]],"date-time":"2017-12-12T00:00:00Z","timestamp":1513036800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Energy Innovation Research Programme","award":["No:NRF2014EWT-EIRP003-010"],"award-info":[{"award-number":["No:NRF2014EWT-EIRP003-010"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Corrosion is a major safety and economic concern to various industries. In this paper, a novel ultrasonic guided wave tomography (GWT) system based on self-designed piezoelectric sensors is presented for on-line corrosion monitoring of large plate-like structures. Accurate thickness reconstruction of corrosion damages is achieved by using the dispersive regimes of selected guided waves and a reconstruction algorithm based on full waveform inversion (FWI). The system makes use of an array of miniaturised piezoelectric transducers that are capable of exciting and receiving highly dispersive A0 Lamb wave mode at low frequencies. The scattering from transducer array has been found to have a small effect on the thickness reconstruction. The efficiency and the accuracy of the new system have been demonstrated through continuous forced corrosion experiments. The FWI reconstructed thicknesses show good agreement with analytical predictions obtained by Faraday\u2019s law and laser measurements, and more importantly, the thickness images closely resemble the actual corrosion sites.<\/jats:p>","DOI":"10.3390\/s17122882","type":"journal-article","created":{"date-parts":[[2017,12,12]],"date-time":"2017-12-12T13:35:00Z","timestamp":1513085700000},"page":"2882","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":52,"title":["On-Line Corrosion Monitoring of Plate Structures Based on Guided Wave Tomography Using Piezoelectric Sensors"],"prefix":"10.3390","volume":"17","author":[{"given":"Jing","family":"Rao","sequence":"first","affiliation":[{"name":"School of Mechanical &amp; Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore"}]},{"given":"Madis","family":"Ratassepp","sequence":"additional","affiliation":[{"name":"School of Mechanical &amp; Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore"},{"name":"Department of Civil Engineering and Architecture, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia"}]},{"given":"Danylo","family":"Lisevych","sequence":"additional","affiliation":[{"name":"School of Mechanical &amp; Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore"}]},{"given":"Mahadhir","family":"Hamzah Caffoor","sequence":"additional","affiliation":[{"name":"School of Mechanical &amp; Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore"}]},{"given":"Zheng","family":"Fan","sequence":"additional","affiliation":[{"name":"School of Mechanical &amp; Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore"}]}],"member":"1968","published-online":{"date-parts":[[2017,12,12]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Roberge, P.R. 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