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The Development of a New IFOG-Based 3C Rotational Seismometer.

Authors :
Cao, Yuwen
Chen, Yanjun
Zhou, Tong
Yang, Chunxia
Zhu, Lanxin
Zhang, Dingfan
Cao, Yujia
Zeng, Weiyi
He, Dong
Li, Zhengbin
Source :
Sensors (14248220). Jun2021, Vol. 21 Issue 11, p3899-3899. 1p.
Publication Year :
2021

Abstract

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 − 7 rads − 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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
14248220
Volume :
21
Issue :
11
Database :
Academic Search Index
Journal :
Sensors (14248220)
Publication Type :
Academic Journal
Accession number :
151213027
Full Text :
https://doi.org/10.3390/s21113899