海洋磁力仪在某近岸海域未爆弹探测中的应用

海底小型铁磁目标探测一直是海洋工程勘察的难点,结合我国近岸某海域海底一处未爆弹的探测实例,介绍了SeaSPY2磁力仪的性能特征,阐述了海洋磁力仪探测数据采集和处理流程。通过对探测出的磁力异常区和同期多波束扫测数据的分析,推断出水下未爆弹的具体位置和大小,为引爆未爆弹提供了准确的数据。此外,根据实践经验,提出了采用木船牵引、利用定高拖曳装置固定磁力探头、选择合适的作业时间、选定合适的日变站位置等四点建议,提高海洋磁力探测精度,为类似项目的应用提供参考。

Application of marine magnetometer in detection of unexploded bombs in a coastal area

The detection of small ferromagnetic targets on the seabed has always been a difficulty in marine engineering investigation.Combined with the detection example of an unexploded bomb on the seafloor of a offshore sea area in China,this paper introduces the performance characteristics of SeaSPY2 magnetometer,and expounds the detection data acquisition and processing flow of ocean magnetometer.Through the analysis of the detected magnetic anomaly area and the simultaneous scanning data of multibeam sounder,the specific location and size of underwater unexploded ordnance are inferred.In addition,according to practical experience,the paper puts forward four suggestions to improve the accuracy of marine magnetic detection,such as using wooden ship traction,using fixed height towing device to fix magnetic probe,selecting appropriate operation time and selecting appropriate location of geomagnetic diurnal variation station,so as to provide reference for the application of similar projects.