发明名称 |
Optical fiber distribution type sensor and optical fiber distribution type detecting method |
摘要 |
The present invention relates to an optical fiber distribution type detecting method and the like equipped with a structure for enabling efficient measurement of a temperature distribution or strain distribution. This method regulates a modulation frequency and modulation index for probe light and pumping light opposingly incident on an object from a light source and a phase difference between the probe light and pumping light, thereby successively setting the length and location of search domains in a region to be measured. In particular, a detection process is executed while resetting the search domain length shorter at a predetermined interval of time or when an abnormality is detected. Thus partly changing the distance resolution for a specific region in the course of the detection process enables efficient measurement operations in a short time.
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申请公布号 |
US7995874(B2) |
申请公布日期 |
2011.08.09 |
申请号 |
US20070443113 |
申请日期 |
2007.09.19 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
SASAOKA EISUKE;YAMAMOTO YOSHINORI |
分类号 |
G02B6/00;G01N21/00 |
主分类号 |
G02B6/00 |
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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