| Yong-xing Guo,Dong-sheng Zhang,Zu-de Zhou,Fang-dong Zhu,Li Xiong,Tian-liang Li.Cantilever based FBG vibration transducer with sensitization structure[J].Optoelectronics Letters,2013,9(6):410-413 |
| Cantilever based FBG vibration transducer with sensitization structure |
| Author Name | Affiliation | E-mail | | Yong-xing Guo | National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan, 430070, China
Key Laboratory of Fiber Optic Sensing Technology and Information Processing, Wuhan University of Technology, Wuhan, 430070, China | gyxing2000@163.com | | Dong-sheng Zhang | National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan, 430070, China
Key Laboratory of Fiber Optic Sensing Technology and Information Processing, Wuhan University of Technology, Wuhan, 430070, China | | | Zu-de Zhou | School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan, 430070, China | | | Fang-dong Zhu | National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan, 430070, China | | | Li Xiong | National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan, 430070, China | | | Tian-liang Li | School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan, 430070, China | |
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| Abstract: |
| We report a fiber Bragg grating (FBG) vibration transducer based on an equal strength cantilever with enhanced sensitivity design. The sensitivity of the transducer is improved by a buffer layer of polyimide which increases the effective distance between the FBG and the neutral axis of the cantilever. The thickness of the polyimide layer is further optimized by finite element analysis (FEA). Vibration test results demonstrate that the sensitivity is enhanced by about 3.34 times than the conventional design, from the original 10.2 pm/g to 44.3 pm/g, which is consistent with the FEA. It is also shown experimentally that the sensitivity enhancement does not degrade the fundamental vibration characteristics of the cantilever, especially the resonant frequency. |
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| This work has been supported by the National High Technology Research and Development Program of China （No.2012AA041203）. |
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