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Transformation of Ground Vibration Signal for Debris-Flow Monitoring and Detection in Alarm Systems
Debris flows are fast mass movements formed by a mix of water and solid materials, which occur in steep torrents, and are a source of high risks for human settlements. Geophones are widely used to detect the ground vibration induced by passing debris flows. However, the recording of geophone signals...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Molecular Diversity Preservation International (MDPI)
2012
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3355446/ https://www.ncbi.nlm.nih.gov/pubmed/22666064 http://dx.doi.org/10.3390/s120404870 |
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author | Abancó, Clàudia Hürlimann, Marcel Fritschi, Bruno Graf, Christoph Moya, José |
author_facet | Abancó, Clàudia Hürlimann, Marcel Fritschi, Bruno Graf, Christoph Moya, José |
author_sort | Abancó, Clàudia |
collection | PubMed |
description | Debris flows are fast mass movements formed by a mix of water and solid materials, which occur in steep torrents, and are a source of high risks for human settlements. Geophones are widely used to detect the ground vibration induced by passing debris flows. However, the recording of geophone signals usually requires storing a huge amount of data, which leads to problems in storage capacity and power consumption. This paper presents a method to transform and simplify the signals measured by geophones. The key input parameter is the ground velocity threshold, which removes the seismic noise that is not related to debris flows. A signal conditioner was developed to implement the transformation and the ground velocity threshold was set by electrical resistors. The signal conditioner was installed at various European monitoring sites to test the method. Results show that data amount and power consumption can be greatly reduced without losing much information on the main features of the debris flows. However, the outcome stresses the importance of choosing a ground vibration threshold, which must be accurately calibrated. The transformation is also suitable to detect other rapid mass movements and to distinguish among different processes, which points to a possible implementation in alarm systems. |
format | Online Article Text |
id | pubmed-3355446 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Molecular Diversity Preservation International (MDPI) |
record_format | MEDLINE/PubMed |
spelling | pubmed-33554462012-06-04 Transformation of Ground Vibration Signal for Debris-Flow Monitoring and Detection in Alarm Systems Abancó, Clàudia Hürlimann, Marcel Fritschi, Bruno Graf, Christoph Moya, José Sensors (Basel) Article Debris flows are fast mass movements formed by a mix of water and solid materials, which occur in steep torrents, and are a source of high risks for human settlements. Geophones are widely used to detect the ground vibration induced by passing debris flows. However, the recording of geophone signals usually requires storing a huge amount of data, which leads to problems in storage capacity and power consumption. This paper presents a method to transform and simplify the signals measured by geophones. The key input parameter is the ground velocity threshold, which removes the seismic noise that is not related to debris flows. A signal conditioner was developed to implement the transformation and the ground velocity threshold was set by electrical resistors. The signal conditioner was installed at various European monitoring sites to test the method. Results show that data amount and power consumption can be greatly reduced without losing much information on the main features of the debris flows. However, the outcome stresses the importance of choosing a ground vibration threshold, which must be accurately calibrated. The transformation is also suitable to detect other rapid mass movements and to distinguish among different processes, which points to a possible implementation in alarm systems. Molecular Diversity Preservation International (MDPI) 2012-04-13 /pmc/articles/PMC3355446/ /pubmed/22666064 http://dx.doi.org/10.3390/s120404870 Text en © 2012 by the authors; licensee MDPI, Basel, Switzerland This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/). |
spellingShingle | Article Abancó, Clàudia Hürlimann, Marcel Fritschi, Bruno Graf, Christoph Moya, José Transformation of Ground Vibration Signal for Debris-Flow Monitoring and Detection in Alarm Systems |
title | Transformation of Ground Vibration Signal for Debris-Flow Monitoring and Detection in Alarm Systems |
title_full | Transformation of Ground Vibration Signal for Debris-Flow Monitoring and Detection in Alarm Systems |
title_fullStr | Transformation of Ground Vibration Signal for Debris-Flow Monitoring and Detection in Alarm Systems |
title_full_unstemmed | Transformation of Ground Vibration Signal for Debris-Flow Monitoring and Detection in Alarm Systems |
title_short | Transformation of Ground Vibration Signal for Debris-Flow Monitoring and Detection in Alarm Systems |
title_sort | transformation of ground vibration signal for debris-flow monitoring and detection in alarm systems |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3355446/ https://www.ncbi.nlm.nih.gov/pubmed/22666064 http://dx.doi.org/10.3390/s120404870 |
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