Optical Fiber Vibration Sensor Using Least Mean Square Error Algorithm
| العنوان: | Optical Fiber Vibration Sensor Using Least Mean Square Error Algorithm |
|---|---|
| المؤلفون: | Yu Chen, Qing Bai, Jie Zou, Xin Liu, Yu Wang, Baoquan Jin, Yuelin Xu |
| المصدر: | Sensors Volume 20 Issue 7 Sensors, Vol 20, Iss 2000, p 2000 (2020) Sensors (Basel, Switzerland) |
| بيانات النشر: | Multidisciplinary Digital Publishing Institute, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Optical fiber, coherent optical time domain reflectometry, Physics::Optics, 02 engineering and technology, lcsh:Chemical technology, 01 natural sciences, Biochemistry, Signal, Article, Analytical Chemistry, law.invention, 010309 optics, Background noise, least mean square error algorithm, 020210 optoelectronics & photonics, law, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Demodulation, lcsh:TP1-1185, Time domain, Electrical and Electronic Engineering, Instrumentation, Physics, Optical amplifier, semiconductor optical amplifier, Extinction ratio, optical fiber vibration sensor, Atomic and Molecular Physics, and Optics, Adaptive filter, Algorithm |
| الوصف: | In order to enhance the signal-to-noise ratio (SNR) of a distributed optical fiber vibration sensor based on coherent optical time domain reflectometry (COTDR), a high extinction ratio cascade structure of an acousto-optic modulator and semiconductor optical amplifier is applied. The prior time-frequency analysis and least mean square error algorithm are adopted in the COTDR system for amplitude demodulation and phase demodulation, in order to improve the SNR by noise elimination. The experimental results show that the adaptive filter based on the least mean square error algorithm could realize the extraction of a three-order sinusoidal harmonic signal from strong background noise along the optical fiber and the SNR improvement from 10.4 dB to 42.2 dB. The proposed demodulation algorithm is suitable for the detection of vibration signals with characteristic frequencies in the application of acoustic fault diagnosis for electromechanical devices. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1424-8220 |
| DOI: | 10.3390/s20072000 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c8f98d169f09278f869a2804d6f9cbc7Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....c8f98d169f09278f869a2804d6f9cbc7 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14248220 |
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| DOI: | 10.3390/s20072000 |