发明名称 |
DEVICE AND METHOD FOR DETECTING LEAKS FROM PIPELINES |
摘要 |
To detect leaks from pipelines carrying fluids, especially oil, light is transmitted through a fibre-optic held in proximity with the pipeline. The fibre-optic is surrounded by a medium of which the refractive index is altered by the influence of the leaked fluid. In a preferred embodiment the medium is a silicone rubber (4) of which the refractive index is normally lower than that of a quartz fibre optic (3), but of which the index increases to that of the quartz or above when oil (7) soaks into it through a permeable cladding (1) and elastomeric protective layer (2), thus rendering the fibre optic non-internally-reflective so that light (6) is absorbed. Control means linked to a light receiver detect that change and the position of the leak is located to within the length of the optic. In another embodiment the medium is a liquid which is expelled from around the optic by the action of leaked fluid. |
申请公布号 |
DE3067474(D1) |
申请公布日期 |
1984.05.17 |
申请号 |
DE19803067474 |
申请日期 |
1980.11.13 |
申请人 |
AVON RUBBER COMPANY LIMITED |
发明人 |
MURPHY, RICHARD JOHN;TURNER, DONALD MILNE |
分类号 |
G01M3/04;G01M3/18;(IPC1-7):G01M3/38 |
主分类号 |
G01M3/04 |
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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