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The Development of a New IFOG-Based 3C Rotational Seismometer
For many years, seismological research mainly focuses on translational ground motions due to the lack of appropriate sensors. However, because of the development of devices based on Sagnac effect, measuring rotational waves directly comes available. In this work, a portable three-component broadband...
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Published in: | Sensors (Basel, Switzerland) Switzerland), 2021-06, Vol.21 (11), p.3899 |
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description | For many years, seismological research mainly focuses on translational ground motions due to the lack of appropriate sensors. However, because of the development of devices based on Sagnac effect, measuring rotational waves directly comes available. In this work, a portable three-component broadband rotational seismometer named RotSensor3C based on open loop interferometric fiber optic gyroscope (IFOG) is designed and demonstrated. Laboratory tests and results are illustrated in detail. The self-noise ranging from 0.005 Hz to 125 Hz is about 1.2×10−7rads−1/Hz, and with the harmonics compensation the scale factor variation over ±250∘/s is lower than 10 ppm (parts per million). The misalignment matrix method is adopted to revise the output rotation rate. In a special near field experiment using the explosive source, the back-azimuths and phase velocity are estimated by the recorded acceleration and rotation rate. All the results prove the practicability of this new rotational sensor. |
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However, because of the development of devices based on Sagnac effect, measuring rotational waves directly comes available. In this work, a portable three-component broadband rotational seismometer named RotSensor3C based on open loop interferometric fiber optic gyroscope (IFOG) is designed and demonstrated. Laboratory tests and results are illustrated in detail. The self-noise ranging from 0.005 Hz to 125 Hz is about 1.2×10−7rads−1/Hz, and with the harmonics compensation the scale factor variation over ±250∘/s is lower than 10 ppm (parts per million). The misalignment matrix method is adopted to revise the output rotation rate. In a special near field experiment using the explosive source, the back-azimuths and phase velocity are estimated by the recorded acceleration and rotation rate. All the results prove the practicability of this new rotational sensor.</description><identifier>ISSN: 1424-8220</identifier><identifier>EISSN: 1424-8220</identifier><identifier>DOI: 10.3390/s21113899</identifier><identifier>PMID: 34200101</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Acceleration ; Broadband ; Communication ; Earthquakes ; fiber optic gyroscope ; Ground motion ; Interferometric fiber optic gyroscopes ; Laboratories ; Light ; Misalignment ; Noise ; Phase velocity ; Rotation ; rotational seismometer ; Sagnac effect ; Seismic engineering ; Seismographs ; Seismology ; Sensors ; three-component</subject><ispartof>Sensors (Basel, Switzerland), 2021-06, Vol.21 (11), p.3899</ispartof><rights>2021 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 (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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However, because of the development of devices based on Sagnac effect, measuring rotational waves directly comes available. In this work, a portable three-component broadband rotational seismometer named RotSensor3C based on open loop interferometric fiber optic gyroscope (IFOG) is designed and demonstrated. Laboratory tests and results are illustrated in detail. The self-noise ranging from 0.005 Hz to 125 Hz is about 1.2×10−7rads−1/Hz, and with the harmonics compensation the scale factor variation over ±250∘/s is lower than 10 ppm (parts per million). The misalignment matrix method is adopted to revise the output rotation rate. In a special near field experiment using the explosive source, the back-azimuths and phase velocity are estimated by the recorded acceleration and rotation rate. All the results prove the practicability of this new rotational sensor.</description><subject>Acceleration</subject><subject>Broadband</subject><subject>Communication</subject><subject>Earthquakes</subject><subject>fiber optic gyroscope</subject><subject>Ground motion</subject><subject>Interferometric fiber optic gyroscopes</subject><subject>Laboratories</subject><subject>Light</subject><subject>Misalignment</subject><subject>Noise</subject><subject>Phase velocity</subject><subject>Rotation</subject><subject>rotational seismometer</subject><subject>Sagnac effect</subject><subject>Seismic engineering</subject><subject>Seismographs</subject><subject>Seismology</subject><subject>Sensors</subject><subject>three-component</subject><issn>1424-8220</issn><issn>1424-8220</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>PIMPY</sourceid><sourceid>DOA</sourceid><recordid>eNpdkU1P3DAQhi1EVT7aA_8gEhd6SDseO4l9AAmWQldCRWr3bjnOBLJK1oud3Yp_j9NFqNQXW_aj5x3PMHbC4asQGr5F5JwLpfUeO-QSZa4QYf-f8wE7inEJgEII9ZEdCIkAHPghO188UnZNW-r9eqDVmPk2s9lP-pPNb-5v8ysbqcnELPvlRzt2fmX77Dd1cfADjRQ-sQ-t7SN9ft2P2eLm-2L2I7-7v53PLu9yJ2U55lUpoNaqKWkKthY4cQ4tcMQKay0bCShrXbcCURdC2bKyWNVIrUMnUByz-U7beLs069ANNjwbbzvz98KHB2PD2LmeTJFiGq7dtGTR8CQpKnBkU7iiRiTXxc613tQDNS79Odj-nfT9y6p7NA9-axROHeNJcPYqCP5pQ3E0Qxcd9b1dkd9Eg4VUEiSUKqGn_6FLvwmphxMltFYAJSTqy45ywccYqH0rhoOZ5mve5iteANnQkz4</recordid><startdate>20210604</startdate><enddate>20210604</enddate><creator>Cao, Yuwen</creator><creator>Chen, Yanjun</creator><creator>Zhou, Tong</creator><creator>Yang, Chunxia</creator><creator>Zhu, Lanxin</creator><creator>Zhang, Dingfan</creator><creator>Cao, Yujia</creator><creator>Zeng, Weiyi</creator><creator>He, Dong</creator><creator>Li, Zhengbin</creator><general>MDPI AG</general><general>MDPI</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>K9.</scope><scope>M0S</scope><scope>M1P</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7X8</scope><scope>5PM</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0002-5229-0551</orcidid><orcidid>https://orcid.org/0000-0002-1207-4635</orcidid></search><sort><creationdate>20210604</creationdate><title>The Development of a New IFOG-Based 3C Rotational Seismometer</title><author>Cao, Yuwen ; 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However, because of the development of devices based on Sagnac effect, measuring rotational waves directly comes available. In this work, a portable three-component broadband rotational seismometer named RotSensor3C based on open loop interferometric fiber optic gyroscope (IFOG) is designed and demonstrated. Laboratory tests and results are illustrated in detail. The self-noise ranging from 0.005 Hz to 125 Hz is about 1.2×10−7rads−1/Hz, and with the harmonics compensation the scale factor variation over ±250∘/s is lower than 10 ppm (parts per million). The misalignment matrix method is adopted to revise the output rotation rate. In a special near field experiment using the explosive source, the back-azimuths and phase velocity are estimated by the recorded acceleration and rotation rate. 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subjects | Acceleration Broadband Communication Earthquakes fiber optic gyroscope Ground motion Interferometric fiber optic gyroscopes Laboratories Light Misalignment Noise Phase velocity Rotation rotational seismometer Sagnac effect Seismic engineering Seismographs Seismology Sensors three-component |
title | The Development of a New IFOG-Based 3C Rotational Seismometer |
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