Active Heat Method with Distribution Fiber Temperature Sensing for Suspension Location of Submarine Power Cable
In order to solve the problem that it is difficult to detect submarine power cables suspended in the sea, an active heat method is proposed to detect and locate suspended cable in the sea with distribution optical fiber temperature sensing technology. Based on the principle of distributed fiber opti...
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| Main Authors: | , |
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| Format: | Article |
| Language: | zho |
| Published: |
Harbin University of Science and Technology Publications
2020-06-01
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| Series: | Journal of Harbin University of Science and Technology |
| Subjects: | |
| Online Access: | https://hlgxb.hrbust.edu.cn/#/digest?ArticleID=1773 |
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| Summary: | In order to solve the problem that it is difficult to detect submarine power cables suspended in the sea, an active heat method is proposed to detect and locate suspended cable in the sea with distribution optical fiber temperature sensing technology. Based on the principle of distributed fiber optic temperature measurement and active heat detection method, three typical models of laying submarine cable are designed. The temperature distribution law of submarine cable surrounded by different media is simulated during active heat process using the finite element method in thermal field. An experimental system is constructed by arranging the multimode optical fiber and heating copper cable in a box mixed with sediment sand and water. In order to eliminate the influence of initial temperature, the temperature increments are taken as the indicator parameter of the medium, which are measured by the optical fiber in the time domain. Then, the heat transfer characteristics are explored according to the temperature increments. The experimental results show that the temperature distribution of sediment sand and water is significantly different during active heating. The temperatures in the sand and water increase with time in the early stage of heating. When heating for some time, the temperature is basically unchanged in the water, but it is still rising in the sand. A step temperature change is demonstrated in the boundary of the medium. Based on the simulation and experiments, it is approved that active heat method with distribution fiber temperature sensing is effective to detect submarine cable suspending. |
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| ISSN: | 1007-2683 |