The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Desenvolvemos um sensor de deformação distribuído de fibra óptica para detectar o colapso de taludes de rios. O sensor usa um refletômetro óptico no domínio do tempo Brillouin (BOTDR) e consiste em um cabo de fibra óptica e pedaços de tecido não tecido. Pedaços de tecido são fixados ao cabo em intervalos de 1.5 metros e ele é então embutido em forma de U na barragem de um rio. Os pedaços de pano são deslocados quando há movimentação do solo onde estão inseridos. Se um dos dois pedaços de tecido adjacentes permanecer parado enquanto o outro se move, a fibra óptica entre os dois pedaços é esticada. O colapso de um aterro pode ser detectado usando um BOTDR para monitorar qualquer estiramento nos comprimentos de fibra de 1.5 m. O sensor desenvolvido opera com sensibilidade de 0.025%/kgf, o que equivale a 0.067%/mm, sendo assim capaz de detectar movimentos de solo de alguns mm em taludes de rios. O sensor também é capaz de fornecer um aviso prévio eficaz sobre o colapso de uma barragem de rio resultante da penetração de água. Submetemos o sistema de sensores a testes de campo que demonstraram a eficácia de sua construção e sua estabilidade a longo prazo. O sistema de sensores desenvolvido é uma ferramenta eficaz para uso em sistemas de gestão fluvial num futuro muito próximo.
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Mitsuru KIHARA, Katsumi HIRAMATSU, Masaki SHIMA, Shigeru IKEDA, "Distributed Optical Fiber Strain Sensor for Detecting River Embankment Collapse" in IEICE TRANSACTIONS on Electronics,
vol. E85-C, no. 4, pp. 952-960, April 2002, doi: .
Abstract: We have developed a distributed optical fiber strain sensor for detecting the collapse of river embankments. The sensor uses a Brillouin optical time domain reflectometer (BOTDR) and consists of an optical fiber cable and pieces of nonwoven cloth. Pieces of cloth are fixed to the cable at 1.5-meter intervals and it is then embedded in a U-shaped configuration in a river embankment. The pieces of cloth are displaced when there is movement of the soil in which they are embedded. If one of two adjacent pieces of cloth remains stationary while the other moves, the optical fiber between the two pieces is stretched. The collapse of an embankment can be detected by using a BOTDR to monitor any such stretching in the 1.5-m lengths of fiber. The developed sensor operates at a sensitivity of 0.025%/kgf, which is equivalent to 0.067%/mm, and is thus capable of detecting soil movements of a few mm in river embankments. The sensor is also able to provide effective advance warning of the collapse of a river embankment resulting from water penetration. We subjected the sensor system to field tests that demonstrated the effectiveness of its construction and its long-term stability. The developed sensor system is an effective tool for use in river management systems of the very near future.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e85-c_4_952/_p
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@ARTICLE{e85-c_4_952,
author={Mitsuru KIHARA, Katsumi HIRAMATSU, Masaki SHIMA, Shigeru IKEDA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Distributed Optical Fiber Strain Sensor for Detecting River Embankment Collapse},
year={2002},
volume={E85-C},
number={4},
pages={952-960},
abstract={We have developed a distributed optical fiber strain sensor for detecting the collapse of river embankments. The sensor uses a Brillouin optical time domain reflectometer (BOTDR) and consists of an optical fiber cable and pieces of nonwoven cloth. Pieces of cloth are fixed to the cable at 1.5-meter intervals and it is then embedded in a U-shaped configuration in a river embankment. The pieces of cloth are displaced when there is movement of the soil in which they are embedded. If one of two adjacent pieces of cloth remains stationary while the other moves, the optical fiber between the two pieces is stretched. The collapse of an embankment can be detected by using a BOTDR to monitor any such stretching in the 1.5-m lengths of fiber. The developed sensor operates at a sensitivity of 0.025%/kgf, which is equivalent to 0.067%/mm, and is thus capable of detecting soil movements of a few mm in river embankments. The sensor is also able to provide effective advance warning of the collapse of a river embankment resulting from water penetration. We subjected the sensor system to field tests that demonstrated the effectiveness of its construction and its long-term stability. The developed sensor system is an effective tool for use in river management systems of the very near future.},
keywords={},
doi={},
ISSN={},
month={April},}
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TY - JOUR
TI - Distributed Optical Fiber Strain Sensor for Detecting River Embankment Collapse
T2 - IEICE TRANSACTIONS on Electronics
SP - 952
EP - 960
AU - Mitsuru KIHARA
AU - Katsumi HIRAMATSU
AU - Masaki SHIMA
AU - Shigeru IKEDA
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E85-C
IS - 4
JA - IEICE TRANSACTIONS on Electronics
Y1 - April 2002
AB - We have developed a distributed optical fiber strain sensor for detecting the collapse of river embankments. The sensor uses a Brillouin optical time domain reflectometer (BOTDR) and consists of an optical fiber cable and pieces of nonwoven cloth. Pieces of cloth are fixed to the cable at 1.5-meter intervals and it is then embedded in a U-shaped configuration in a river embankment. The pieces of cloth are displaced when there is movement of the soil in which they are embedded. If one of two adjacent pieces of cloth remains stationary while the other moves, the optical fiber between the two pieces is stretched. The collapse of an embankment can be detected by using a BOTDR to monitor any such stretching in the 1.5-m lengths of fiber. The developed sensor operates at a sensitivity of 0.025%/kgf, which is equivalent to 0.067%/mm, and is thus capable of detecting soil movements of a few mm in river embankments. The sensor is also able to provide effective advance warning of the collapse of a river embankment resulting from water penetration. We subjected the sensor system to field tests that demonstrated the effectiveness of its construction and its long-term stability. The developed sensor system is an effective tool for use in river management systems of the very near future.
ER -