Long-range vibration sensor based on correlation analysis of optical frequency-domain reflectometry signals
We present a novel method to achieve a space-resolved long- range vibration detection system based on the correlation analysis of the optical frequency-domain reflectometry (OFDR) signals. By performing two separate measurements of the vibrated and non-vibrated states on a test fiber, the vibration...
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| Veröffentlicht in: | Optics express 2012-12, Vol.20 (27), p.28319-28329 |
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| container_issue | 27 |
| container_start_page | 28319 |
| container_title | Optics express |
| container_volume | 20 |
| creator | Ding, Zhenyang Yao, X Steve Liu, Tiegen Du, Yang Liu, Kun Han, Qun Meng, Zhuo Chen, Hongxin |
| description | We present a novel method to achieve a space-resolved long- range vibration detection system based on the correlation analysis of the optical frequency-domain reflectometry (OFDR) signals. By performing two separate measurements of the vibrated and non-vibrated states on a test fiber, the vibration frequency and position of a vibration event can be obtained by analyzing the cross-correlation between beat signals of the vibrated and non-vibrated states in a spatial domain, where the beat signals are generated from interferences between local Rayleigh backscattering signals of the test fiber and local light oscillator. Using the proposed technique, we constructed a standard single-mode fiber based vibration sensor that can have a dynamic range of 12 km and a measurable vibration frequency up to 2 kHz with a spatial resolution of 5 m. Moreover, preliminarily investigation results of two vibration events located at different positions along the test fiber are also reported. |
| doi_str_mv | 10.1364/oe.20.028319 |
| format | Article |
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| identifier | ISSN: 1094-4087 |
| ispartof | Optics express, 2012-12, Vol.20 (27), p.28319-28329 |
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| language | eng |
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| source | MEDLINE; DOAJ Directory of Open Access Journals; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| subjects | Equipment Design Equipment Failure Analysis Fiber Optic Technology - instrumentation Photometry - instrumentation Refractometry - instrumentation Transducers Vibration |
| title | Long-range vibration sensor based on correlation analysis of optical frequency-domain reflectometry signals |
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