{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,6]],"date-time":"2026-03-06T12:15:18Z","timestamp":1772799318359,"version":"3.50.1"},"reference-count":14,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2016,1,21]],"date-time":"2016-01-21T00:00:00Z","timestamp":1453334400000},"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>By fixing two FBGs on the surface of a rotating shaft along the direction of \u00b145\u00b0 and using dynamic wavelength demodulation technology, we propose an optical fiber sensing system to monitor the driving torque and torsion angle of the rotating shaft. In theory, the dependence relation of the dynamic difference of central wavelengths on the torque and torsion angle of the rotating shaft has been deduced. To verify an optical fiber sensing system, a series of sensing experiments have been completed and the measured data are approximately consistent with the theoretical analysis. The difference of two central wavelengths can be expressed as the sum of two parts: a \u201cDC\u201d part and a harmonic \u201cAC\u201d part. The driving torque or torsion angle is linear with the \u201cDC\u201d part of the difference of two central wavelengths, the harmonic \u201cAC\u201d part, meaning the torsion angle vibration, illustrates that periodic vibration torque may be caused by inhomogeneous centrifugal forces or inhomogeneous additional torques produced by the driving system and the load.<\/jats:p>","DOI":"10.3390\/s16010138","type":"journal-article","created":{"date-parts":[[2016,1,22]],"date-time":"2016-01-22T11:36:13Z","timestamp":1453462573000},"page":"138","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["A Two Fiber Bragg Gratings Sensing System to Monitor the Torque of Rotating Shaft"],"prefix":"10.3390","volume":"16","author":[{"given":"Yongjiao","family":"Wang","sequence":"first","affiliation":[{"name":"National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China"},{"name":"School of Computer Science and Engineering, Henan University of Urban Construction, Pingdingshan 467000, China"}]},{"given":"Lei","family":"Liang","sequence":"additional","affiliation":[{"name":"National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China"}]},{"given":"Yinquan","family":"Yuan","sequence":"additional","affiliation":[{"name":"National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China"}]},{"given":"Gang","family":"Xu","sequence":"additional","affiliation":[{"name":"National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China"}]},{"given":"Fang","family":"Liu","sequence":"additional","affiliation":[{"name":"National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, China"}]}],"member":"1968","published-online":{"date-parts":[[2016,1,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"31","DOI":"10.1016\/j.sna.2013.01.039","article-title":"Design optimization of fiber Bragg grating accelerometer for maximum sensitivity","volume":"194","author":"Basumallick","year":"2013","journal-title":"Sens. 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Proceedings of the 2007 14th ICSV, Cairns, Australia."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"065303","DOI":"10.1088\/0957-0233\/19\/6\/065303","article-title":"A novel online rotor condition monitoring system using fiber Bragg grating (FBG) sensors and a rotary optical coupler","volume":"19","author":"Lee","year":"2008","journal-title":"Meas. Sci. Technol."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"20","DOI":"10.1016\/j.sna.2004.01.043","article-title":"Prospects for Fiber Bragg Gratings and Fabry-Perot Interferometers in fibre-optic vibration sensing","volume":"113","author":"Gangopadhyay","year":"2004","journal-title":"Sens. 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