Fundamental study of a multiple component DAS sensor

Takekawa, Junichi; Mikada, Hitoshi; Xu, Shibo; Uno, Masahiro; Lin, Pairan; Watanabe, Y.; Zhou, Ziyang; Masumura, Ryo; Jang, Iktae; Pan, Rundong; Kayama, K.; Matsuo, T.; Ishizuki, Ayane; Kamei, Shiori; Kishida, Kinzo; Azuma, Daiji; Aoyanagi, Masafumi; Tanaka, Naoto; Ichikawa, Hiroki

doi:10.1190/iceg2021-079.1

Sixth International Conference on Engineering Geophysics, Virtual, 25–28 October 2021 2021

DOI: 10.1190/iceg2021-079.1

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Fundamental study of a multiple component DAS sensor

Junichi Takekawa

Hitoshi Mikada

Shibo Xu

et al.

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2022

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A new DAS sensor prototype for multicomponent seismic data

Takekawa

Mikada

et al. 2022

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We present a novel type of multicomponent sensor prototype that uses distributed acoustic sensing (DAS) technology. A prototype of the new sensor has three individual parts consisting of optical fiber wound around a polyvinyl chloride frame. We deployed the sensor prototype at a test site and recorded seismic waves generated by a wooden hammer. A geophone array was also set for comparison purposes. The data observed with the new DAS sensor prototype show good agreement with the conventional geophone. The particle motion of waveforms obtained by the DAS sensor prototype shows ellipsoidal motion, the propagating velocity of which coincides with the velocity of the Rayleigh waves estimated by the dispersion curve based on the geophone data. We introduced a simple string model to explain the dynamic behavior of the sensor. The analysis results of the string model can explain features of recorded seismic data. These results indicate that the DAS sensor prototype records seismic waves via lateral vibration of the string. The present study shows a new possibility of the multicomponent sensor with the DAS technology.

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A new DAS sensor prototype for multicomponent seismic data

Takekawa

Mikada

et al. 2022

The Leading Edge

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show abstract

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Fundamental study of a multiple component DAS sensor

Cited by 1 publication

References 9 publications

A new DAS sensor prototype for multicomponent seismic data

A new DAS sensor prototype for multicomponent seismic data

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