ZHOU Puzhi,LI Zhengyuan,SHEN Zezhong,et al.Research and application of magnetic detection technology for submarine optical cable[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2021,60(04):100-110.
ZHOU Puzhi,LI Zhengyuan,SHEN Zezhong,et al.Research and application of magnetic detection technology for submarine optical cable[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2021,60(04):100-110. DOI: 10.13471/j.cnki.acta.snus.2020.05.06.2020B050.
Research and application of magnetic detection technology for submarine optical cable
During the submarine optical cable route survey, the laying cable is hard to be detected by sonar detection as side-scan sonar or shallow stratum profile instrument, because of its slender shape and buried depth,this paper introduces the structure and magnetic characteristics of the submarine optical cable, and emphatically analyzes the magnetic anomaly forward curve of the submarine optical cable with remote power supply. We detected actual the optical cable that is similar to the forward model. It is verified that the submarine optical cable magnetic anomaly is mainly generated by the current, and is related to the current intensity and the depth of burial. The position of the optical cable is at the geometric center of the magnetic anomaly curve. According to the magnetic anomaly forward curve feature of laying cable, the magnetic detection method can be used with the underwater positioning system to pinpoint the optical cable. Taking China shallow water section of Bay to Bay Express cable (BtoBE) as an example. We discusses the surveying line layout, equipments, data processing, profile-plan drawing. This paper has a reference meaning for explaining the magnetic anomaly of submarine optical cables and implementing magnetic detection in similar projects.
LIU B H, DING J S, PEI Y L, et al.Marine geophysical survey techniques and their applications to offshore engineering [J]. Advances in Marine Science, 2005,23(3):374-384.
张彦昌,郑佳.海底管线调查综合物探作业方法研究[J].海洋技术,2010,29(1):78-81.
ZHANG Y C, ZHENG J. Comprehensive geophysical prospecting method applied in subsea pipelines surveying [J]. Ocean Technology, 2010, 29(1): 78-81.
陈新来,张扬.质子磁力仪探测海底光缆应用研究[J].光通信技术,2015,39(9):33-35.
CHEN X L, ZHANG Y. Application study of proton magnetometer to detect submarine cable[J]. Optical Communication Technology, 2015, 39(9): 33-35.
ZENG F X, HU J F, SONG L Y. Applied research in positioning of towing equipment by USBL[J]. Gnss World of China, 2014(2): 82-86.
姬可理,张文轩. 海底光缆结构与发展[J].光通信技术, 2006, 30(5): 64-66.
JI K L, ZHANG W X. Structure of submarine optical fiber cable and development [J]. Optical Communication Technology, 2006, 30(5): 64-66.
YU B, LIU Y C, ZHAI G J. Magnetic detection method for seabed cable in marine engineering surveying [J]. Geospatial Information Science, 2007, 10(3): 186 -190.
刘胜旋.光泵磁力仪在光缆路由调查中的应用[J].海洋测绘, 2002,22(1):25-29.
LIU S X. On the application of optical pumping magnetometer to the investigation in optical cable routing[J]. Hydrographic Surveying and Charting, 2002, 22(1): 25-29.
BIAN G L, ZHAI G J, LIU Y C, et al. Effective operating range of base stations in marine geomagnetic survey [J]. Progress in Geophysics, 2010, 25(3): 817-822.