Simultaneous measurement of strain and temperature using a hybrid local and distributed optical fiber sensing system |
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| Affiliation: | 1. School of Civil Engineering, Dalian University of Technology, Dalian 116024, PR China;2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, PR China;1. School of Instrument Science and Optic-Electronics Engineering, Hefei University of Technology, Hefei 230009, China;2. Institute of Fiber Optics, Heilongjiang University, 150080 Harbin, China;1. Instituto de Telecomunicações, I3N and Physics Department, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal;2. Aston Institute of Photonic Technologies, Aston University, Aston Triangle, Birmingham B7 4ET, United Kingdom;3. Instituto de Telecomunicações and Department of Electrical and Computer Engineering, Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, Portugal |
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| Abstract: | Structure multi-parameters measurement, such as strain, displacement, corrosion and temperature, is of the utmost importance for structural health monitoring. Meanwhile uncoupling method of temperature and strain has still a technical problem in structure sensing measurement. In this paper, we proposed a method for simultaneous measurement of strain and temperature using a hybrid local and distributed optical fiber sensing system. The principle of the method is investigated and then validated by the theoretical simulation experiments and tensile tests in laboratory. Furthermore, one experiment for internal force measurement of a smart stranded wire, under the interaction of temperature and strain, is also conducted in lab. The experimental results show that the strain and temperature can be well measured simultaneously by using one multi-signal optical fiber sensor. |
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| Keywords: | Structural health monitoring Simultaneous measurement of strain and temperature Temperature compensation Brillouin optical fiber sensor Hybrid local and distributed optical fiber sensing system |
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