pulse-width multiplexing ϕ-otdr for nuisance-alarm rate reduction
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ID: 153450
2018
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Abstract
A pulse-width multiplexing method for reducing the nuisance-alarm rate of a phase-sensitive optical time-domain reflectometer ( ϕ -OTDR) is described. In this method, light pulses of different pulse-widths are injected into the sensing fiber; the data acquired at different pulse-widths are regarded as the outputs of different sensors; and these data are then processed by a multisensor data fusion algorithm. In laboratory tests with a sensing fiber on a vibrating table, the effects of pulse-width on the signal-to-noise ratio (SNR) of the ϕ -OTDR data are observed. Furthermore, by utilizing the SNR as the feature in a feature-layer algorithm based on Dempster–Shafer evidential theory, a four-pulse-width multiplexing ϕ -OTDR system is constructed, and the nuisance-alarm rate is reduced by about 70%. These experimental results show that the proposed method has great potential for perimeter protection, since the nuisance-alarm rate is significantly reduced by using a simple configuration.
| Reference Key |
zhong2018sensorspulse-width
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|---|---|
| Authors | ;Xiang Zhong;Xicheng Gao;Huaxia Deng;Shisong Zhao;Mengchao Ma;Jin Zhang;Jianquan Li |
| Journal | ekonomiczne problemy usług |
| Year | 2018 |
| DOI |
10.3390/s18103509
|
| URL | |
| Keywords | Keywords not found |
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