{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T12:29:14Z","timestamp":1777638554451,"version":"3.51.4"},"reference-count":21,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2022,1,10]],"date-time":"2022-01-10T00:00:00Z","timestamp":1641772800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In the proposed work, a fiber-optic-based sensor network was employed for the monitoring of the liquid resin infusion process. The item under test was a panel composed by a skin and four stringers, sensorized in such a way that both the temperature and the resin arrival could be monitored. The network was arranged with 18 Fiber Bragg Gratings (FBGs) working as temperature sensors and 22 fiber optic probes with a modified front-end in order to detect the resin presence. After an in-depth study to find a better solution to install the sensors without affecting the measurements, the system was investigated using a commercial Micron Optics at 0.5 Hz, with a passive split-box connected in order to be able to sense all the sensors simultaneously. The obtained results in terms of resin arrival detection at different locations and the relative temperature trend allowed us to validate an infusion process numerical model, giving us better understanding of what the actual resin flow was and the time needed to dry preform filling during the infusion process.<\/jats:p>","DOI":"10.3390\/s22020508","type":"journal-article","created":{"date-parts":[[2022,1,10]],"date-time":"2022-01-10T22:03:13Z","timestamp":1641852193000},"page":"508","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Liquid Resin Infusion Process Validation through Fiber Optic Sensor Technology"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3949-2746","authenticated-orcid":false,"given":"Vincenzo Romano","family":"Marrazzo","sequence":"first","affiliation":[{"name":"Department of Electrical Engineering and Information Technology (DIETI), University of Naples \u201cFederico II\u201d, 80125 Naples, Italy"}]},{"given":"Armando","family":"Laudati","sequence":"additional","affiliation":[{"name":"OptoSmart S.R.L., 80121 Naples, Italy"}]},{"given":"Michele","family":"Vitale","sequence":"additional","affiliation":[{"name":"OptoSmart S.R.L., 80121 Naples, Italy"}]},{"given":"Francesco","family":"Fienga","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering and Information Technology (DIETI), University of Naples \u201cFederico II\u201d, 80125 Naples, Italy"}]},{"given":"Gianni","family":"Iagulli","sequence":"additional","affiliation":[{"name":"Leonardo S.P.A.\u2014Aircraft Division, Viale dell\u2019Aeronautica, 80038 Naples, Italy"}]},{"given":"Marco","family":"Raffone","sequence":"additional","affiliation":[{"name":"Leonardo S.P.A.\u2014Aircraft Division, Viale dell\u2019Aeronautica, 80038 Naples, Italy"}]},{"given":"Andrea","family":"Cusano","sequence":"additional","affiliation":[{"name":"OptoSmart S.R.L., 80121 Naples, Italy"},{"name":"Department of Engineering, University of Sannio, Corso Garibaldi, 82100 Benevento, Italy"}]},{"given":"Michele","family":"Giordano","sequence":"additional","affiliation":[{"name":"OptoSmart S.R.L., 80121 Naples, Italy"},{"name":"Institute of Composite Materials Technology National Research Council (ITMC-CNR), 80125 Naples, Italy"}]},{"given":"Antonello","family":"Cutolo","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering and Information Technology (DIETI), University of Naples \u201cFederico II\u201d, 80125 Naples, Italy"},{"name":"OptoSmart S.R.L., 80121 Naples, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9350-5483","authenticated-orcid":false,"given":"Giovanni","family":"Breglio","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering and Information Technology (DIETI), University of Naples \u201cFederico II\u201d, 80125 Naples, Italy"},{"name":"OptoSmart S.R.L., 80121 Naples, Italy"}]}],"member":"1968","published-online":{"date-parts":[[2022,1,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"517","DOI":"10.1016\/1359-835X(96)00008-5","article-title":"Resin infusion under flexible tooling (RIFT): A review","volume":"27","author":"Williams","year":"1996","journal-title":"Compos. 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