发明名称 |
DETECTING BROADSIDE AND DIRECTIONAL ACOUSTIC SIGNALS WITH A FIBER OPTICAL DISTRIBUTED ACOUSTIC SENSING (DAS) ASSEMBLY |
摘要 |
A Distributed Acoustic Sensing(DAS) fiber optical assembly comprises adjacent lengths of optical fiber A, B with different directional acoustic sensitivities, for example by providing the first length of optical fiber A with a first coating 35, such as acrylate, and the second length of optical fiber B with a second coating 36, such as copper, wherein the first and second coatings 35 and 36 may be selected such that the Poisson's ratio of the first length of coated fiber A is different from the Poisson's ratio of the second length of coated fiber B. The different Poisson's ratios and/or other properties of the adjacent lengths of optical fiber A and B improve their directional acoustic sensitivity and their ability to detect broadside (radial) acoustic waves. |
申请公布号 |
WO2011079098(A2) |
申请公布日期 |
2011.06.30 |
申请号 |
WO2010US61439 |
申请日期 |
2010.12.21 |
申请人 |
SHELL OIL COMPANY;SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.;MESTAYER, JEFFERY, JOSEPH;WILLS, PETER, BERKELEY |
发明人 |
MESTAYER, JEFFERY, JOSEPH;WILLS, PETER, BERKELEY |
分类号 |
G01V1/40;E21B47/00;G01N29/26 |
主分类号 |
G01V1/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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