Influence of fiber-optic cable structure, sand density, and acoustic frequency on DAS amplitude response: Preliminary results

Autor:	Cheng-Cheng Zhang, Liang Dai, Jia-Song Chen, Tao Xie, Ya-Ping Fu, Jun Yin, Bin Shi
Rok vydání:	2020
Předmět:	Optical fiber Amplitude response law Acoustics Critical factors Acoustic sensor Sandbox (locomotive) Medium density Distributed acoustic sensing Geology Acoustic frequency law.invention
Zdroj:	IOP Conference Series: Earth and Environmental Science. 570:062031
ISSN:	1755-1315 1755-1307
DOI:	10.1088/1755-1315/570/6/062031
Popis:	Distributed acoustic sensing (DAS) is an emerging fiber-optic technology that can turn tens of kilometers long fiber-optic cables into dense acoustic sensor arrays. This technology is expected to bring new opportunities for geologic hazard characterization and mitigation. The cable structure and installation method are two critical factors affecting the performance of a DAS system. Here, we report laboratory tests performed in a sandbox to evaluate the acoustic response of different types of cables at variable sand densities and acoustic frequencies. Our initial results indicated that complex cable packaging structures had unfavorable impacts on the DAS amplitude response whereas the influence of sand density was dependent on cable structure and acoustic frequency. Further tests with refined measurement setup will improve the understanding of the combined effects of cable type, medium density, and acoustic frequency on DAS recordings.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2fa1f52dcda92a03697aeb896e9c4cc4 https://doi.org/10.1088/1755-1315/570/6/062031 Zobrazit plný text záznamu