发明名称 |
FIBRE OPTIC DISTRIBUTED SENSING |
摘要 |
The application describes methods and apparatus for distributed fibre sensing, especially distributed acoustic/strain sensing. The method involves launching interrogating radiation in to an optical fibre and sampling radiation backscattered from within said fibre at a rate so as to acquire a plurality of samples corresponding to each sensing portion of interest. The plurality of samples are divided into separate processing channels and processed to determine a phase value for that channel. A quality metric is then applied to the processed phase data and the data combined to provide an overall phase value for the sensing portion based on the quality metric. The quality metric may be a measure of the degree of similarity of the processed data from the channels. The interrogating radiation may comprise two relatively narrow pulses separated by a relatively wide gap and the sampling rate may be set such that a plurality of substantially independent diversity samples are acquired. |
申请公布号 |
CA2832362(A1) |
申请公布日期 |
2012.10.11 |
申请号 |
CA20122832362 |
申请日期 |
2012.04.10 |
申请人 |
OPTASENSE HOLDINGS LIMITED |
发明人 |
RUSSELL, STUART;LEWIS, ANDREW |
分类号 |
G01D1/00;G01D1/02;G01D5/353 |
主分类号 |
G01D1/00 |
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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