{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,30]],"date-time":"2025-10-30T22:27:18Z","timestamp":1761863238795,"version":"build-2065373602"},"reference-count":25,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2013,8,29]],"date-time":"2013-08-29T00:00:00Z","timestamp":1377734400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A simple noncontact force sensor based on an optical fiber Bragg grating attached to a small magnet has been proposed and built. The sensor measures the force between the magnet and any ferromagnetic material placed within a few millimeters of the sensor. Maintaining the sensor at a constant standoff distance, material loss due to corrosion increases the distance between the magnet and the corroded surface, which decreases the magnetic force. This will decrease the strain in the optical fiber shifting the reflected Bragg wavelength. The measured shift for the optical fiber used was 1.36 nm per Newton. Models were developed to optimize the magnet geometry for a specific sensor standoff distance and for particular corrosion pit depths. The sensor was able to detect corrosion pits on a fuel storage tank bottom with depths in the sub-millimeter range.<\/jats:p>","DOI":"10.3390\/s130911476","type":"journal-article","created":{"date-parts":[[2013,8,29]],"date-time":"2013-08-29T12:45:08Z","timestamp":1377780308000},"page":"11476-11489","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["A Noncontact Force Sensor Based on a Fiber Bragg Grating and Its Application for Corrosion Measurement"],"prefix":"10.3390","volume":"13","author":[{"given":"Clara","family":"Pacheco","sequence":"first","affiliation":[{"name":"Departamento de F\u00edsica, Pontif\u00edcia Universidade Cat\u00f3lica do Rio de Janeiro,  Rua Marqu\u00eas de S\u00e3o Vicente 225, Rio de Janeiro, RJ 22451-900, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Antonio","family":"Bruno","sequence":"additional","affiliation":[{"name":"Departamento de F\u00edsica, Pontif\u00edcia Universidade Cat\u00f3lica do Rio de Janeiro,  Rua Marqu\u00eas de S\u00e3o Vicente 225, Rio de Janeiro, RJ 22451-900, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2013,8,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1142","DOI":"10.1109\/50.618377","article-title":"Fiber grating sensors","volume":"15","author":"Kersey","year":"1997","journal-title":"J. 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