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Signal Activity Detection for Fiber Optic Distributed Acoustic Sensing with Adaptive-Calculated Threshold

The key point on analyzing the data stream measured by fiber optic distributed acoustic sensing (DAS) is signal activity detection separating measured signals from environmental noise. The inability to calculate the threshold for signal activity detection accurately and efficiently without affecting...

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Detalles Bibliográficos
Autores principales: Ma, Lilong, Xu, Tuanwei, Cao, Kai, Jiang, Yinghao, Deng, Dimin, Li, Fang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8877182/
https://www.ncbi.nlm.nih.gov/pubmed/35214572
http://dx.doi.org/10.3390/s22041670
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author Ma, Lilong
Xu, Tuanwei
Cao, Kai
Jiang, Yinghao
Deng, Dimin
Li, Fang
author_facet Ma, Lilong
Xu, Tuanwei
Cao, Kai
Jiang, Yinghao
Deng, Dimin
Li, Fang
author_sort Ma, Lilong
collection PubMed
description The key point on analyzing the data stream measured by fiber optic distributed acoustic sensing (DAS) is signal activity detection separating measured signals from environmental noise. The inability to calculate the threshold for signal activity detection accurately and efficiently without affecting the measured signals is a bottleneck problem for current methods. In this article, a novel signal activity detection method with the adaptive-calculated threshold is proposed to solve the problem. With the analysis of the time-varying random noise’s statistical commonality and the short-term energy (STE) of real-time data stream, the top range of the total STE distribution of the noise is found accurately for real-time data stream’s ascending STE, thus the adaptive dividing level of signals and noise is obtained as the threshold. Experiments are implemented with simulated database and urban field database with complex noise. The average detection accuracies of the two databases are 97.34% and 90.94% only consuming 0.0057 s for a data stream of 10 s, which demonstrates the proposed method is accurate and high efficiency for signal activity detection.
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spelling pubmed-88771822022-02-26 Signal Activity Detection for Fiber Optic Distributed Acoustic Sensing with Adaptive-Calculated Threshold Ma, Lilong Xu, Tuanwei Cao, Kai Jiang, Yinghao Deng, Dimin Li, Fang Sensors (Basel) Article The key point on analyzing the data stream measured by fiber optic distributed acoustic sensing (DAS) is signal activity detection separating measured signals from environmental noise. The inability to calculate the threshold for signal activity detection accurately and efficiently without affecting the measured signals is a bottleneck problem for current methods. In this article, a novel signal activity detection method with the adaptive-calculated threshold is proposed to solve the problem. With the analysis of the time-varying random noise’s statistical commonality and the short-term energy (STE) of real-time data stream, the top range of the total STE distribution of the noise is found accurately for real-time data stream’s ascending STE, thus the adaptive dividing level of signals and noise is obtained as the threshold. Experiments are implemented with simulated database and urban field database with complex noise. The average detection accuracies of the two databases are 97.34% and 90.94% only consuming 0.0057 s for a data stream of 10 s, which demonstrates the proposed method is accurate and high efficiency for signal activity detection. MDPI 2022-02-21 /pmc/articles/PMC8877182/ /pubmed/35214572 http://dx.doi.org/10.3390/s22041670 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ma, Lilong
Xu, Tuanwei
Cao, Kai
Jiang, Yinghao
Deng, Dimin
Li, Fang
Signal Activity Detection for Fiber Optic Distributed Acoustic Sensing with Adaptive-Calculated Threshold
title Signal Activity Detection for Fiber Optic Distributed Acoustic Sensing with Adaptive-Calculated Threshold
title_full Signal Activity Detection for Fiber Optic Distributed Acoustic Sensing with Adaptive-Calculated Threshold
title_fullStr Signal Activity Detection for Fiber Optic Distributed Acoustic Sensing with Adaptive-Calculated Threshold
title_full_unstemmed Signal Activity Detection for Fiber Optic Distributed Acoustic Sensing with Adaptive-Calculated Threshold
title_short Signal Activity Detection for Fiber Optic Distributed Acoustic Sensing with Adaptive-Calculated Threshold
title_sort signal activity detection for fiber optic distributed acoustic sensing with adaptive-calculated threshold
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8877182/
https://www.ncbi.nlm.nih.gov/pubmed/35214572
http://dx.doi.org/10.3390/s22041670
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