Fibre Optic System for Monitoring Rotational Seismic Phenomena
We outline the development and the application in a field test of the Autonomous Fibre-Optic Rotational Seismograph (AFORS), which utilizes the Sagnac effect for a direct measurement of the seismic-origin rotations of the ground. The main advantage of AFORS is its complete insensitivity to linear mo...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2014-03-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1424-8220/14/3/5459 |
| _version_ | 1798041872194600960 |
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| author | Anna Kurzych Leszek R. Jaroszewicz Zbigniew Krajewski Krzysztof P. Teisseyre Jerzy K. Kowalski |
| author_facet | Anna Kurzych Leszek R. Jaroszewicz Zbigniew Krajewski Krzysztof P. Teisseyre Jerzy K. Kowalski |
| author_sort | Anna Kurzych |
| collection | DOAJ |
| description | We outline the development and the application in a field test of the Autonomous Fibre-Optic Rotational Seismograph (AFORS), which utilizes the Sagnac effect for a direct measurement of the seismic-origin rotations of the ground. The main advantage of AFORS is its complete insensitivity to linear motions, as well as a direct measurement of rotational components emitted during seismic events. The presented system contains a special autonomous signal processing unit which optimizes its operation for the measurement of rotation motions, whereas the applied telemetric system based on the Internet allows for an AFORS remote control. The laboratory investigation of such two devices indicated that they keep an accuracy of no less than 5.1 × 10−9 to 5.5 × 10−8 rad/s in the detection frequency band from 0.83~106.15 Hz and protect linear changes of sensitivity in the above bandpass. Some experimental results of an AFORS-1 application for a continuous monitoring of the rotational events in the Książ (Poland) seismological observatory are also presented. |
| first_indexed | 2024-04-11T22:27:37Z |
| format | Article |
| id | doaj.art-9c1c0d6ad6a6402197f7df46cbed1c1e |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T22:27:37Z |
| publishDate | 2014-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-9c1c0d6ad6a6402197f7df46cbed1c1e2022-12-22T03:59:36ZengMDPI AGSensors1424-82202014-03-011435459546910.3390/s140305459s140305459Fibre Optic System for Monitoring Rotational Seismic PhenomenaAnna Kurzych0Leszek R. Jaroszewicz1Zbigniew Krajewski2Krzysztof P. Teisseyre3Jerzy K. Kowalski4Institute of Applied Physics, Military University of Technology, 2 Gen. Sylwestra Kaliskiego St., 00-908 Warsaw, PolandInstitute of Applied Physics, Military University of Technology, 2 Gen. Sylwestra Kaliskiego St., 00-908 Warsaw, PolandInstitute of Applied Physics, Military University of Technology, 2 Gen. Sylwestra Kaliskiego St., 00-908 Warsaw, PolandInstitute of Geophysics, Polish Academy of Sciences, 64 Księcia Janusza St., 01-452 Warsaw, Polandm-Soft Ltd., 9-4 Sotta St., 02-790 Warsaw, PolandWe outline the development and the application in a field test of the Autonomous Fibre-Optic Rotational Seismograph (AFORS), which utilizes the Sagnac effect for a direct measurement of the seismic-origin rotations of the ground. The main advantage of AFORS is its complete insensitivity to linear motions, as well as a direct measurement of rotational components emitted during seismic events. The presented system contains a special autonomous signal processing unit which optimizes its operation for the measurement of rotation motions, whereas the applied telemetric system based on the Internet allows for an AFORS remote control. The laboratory investigation of such two devices indicated that they keep an accuracy of no less than 5.1 × 10−9 to 5.5 × 10−8 rad/s in the detection frequency band from 0.83~106.15 Hz and protect linear changes of sensitivity in the above bandpass. Some experimental results of an AFORS-1 application for a continuous monitoring of the rotational events in the Książ (Poland) seismological observatory are also presented.http://www.mdpi.com/1424-8220/14/3/5459fibre optic Sagnac interferometerrotational seismic phenomenacontinuously monitoringremote control |
| spellingShingle | Anna Kurzych Leszek R. Jaroszewicz Zbigniew Krajewski Krzysztof P. Teisseyre Jerzy K. Kowalski Fibre Optic System for Monitoring Rotational Seismic Phenomena Sensors fibre optic Sagnac interferometer rotational seismic phenomena continuously monitoring remote control |
| title | Fibre Optic System for Monitoring Rotational Seismic Phenomena |
| title_full | Fibre Optic System for Monitoring Rotational Seismic Phenomena |
| title_fullStr | Fibre Optic System for Monitoring Rotational Seismic Phenomena |
| title_full_unstemmed | Fibre Optic System for Monitoring Rotational Seismic Phenomena |
| title_short | Fibre Optic System for Monitoring Rotational Seismic Phenomena |
| title_sort | fibre optic system for monitoring rotational seismic phenomena |
| topic | fibre optic Sagnac interferometer rotational seismic phenomena continuously monitoring remote control |
| url | http://www.mdpi.com/1424-8220/14/3/5459 |
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