A novel fiber Bragg grating vibration sensor with double equal-strength cantilever beams
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1. Xi’an Research Institute of High Technology, Xi’an 710025, China ;2. High-tech Institute, Qingzhou 262500, China;3. Rocket Force Unit 96921, Beijing 100000, China

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    Abstract:

    In practice, since the measurement environments are usually complex, the electromagnetic interference problem has been an important issue for sensor applications, and the fiber sensor can overcome it effectively. this paper proposes a new type of vibration sensor based on fiber Bragg grating (FBG). The vibration sensor with double equal strength cantilever beams structure can further improve the measurement stability. The physical model of FBG vibration sensor was established, and the structural parameters of the double equa-strength cantilever beams were designed and optimized by finite element analysis. Both simulation and experimental tests are included in this paper to illustrate the low-frequency vibration performance of the designed vibration sensor. Among, the sensitivity of the sensor was 0.024 0 pm/(m.s-2), the natural frequency was 185 Hz, and the linearity was obtained, which further verify the stability and reliability of the sensor vibration frequency measurement.

    Reference
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HE Zhenxin, ZHANG Zhengyi, LI Liang, ZHAN Ying, MI Wenpeng, FENG Yongbao. A novel fiber Bragg grating vibration sensor with double equal-strength cantilever beams[J]. Optoelectronics Letters,2021,17(6):321-327

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History
  • Received:July 19,2020
  • Revised:August 24,2020
  • Online: July 07,2021
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