船舶水下被动磁性定位研究

Research on Vessel Location by Underwater Passive Magnetic Signature

分析了一种对水面及水下铁磁物体的水下被动磁性定位技术,首先,建立船舶的旋转椭球体和磁偶极子模型,采用2个或以上的磁场传感器,采集目标通过时的磁场数据。在已知传感器间距时,解算模型,可得到传感器与的目标的空间位置。适用于合作目标和非合作目标。该技术综合磁性船模磁场数据以及实船的海上测量数据对目标进行定位计算,定位精度优于水声被动定位法,结果稳定可靠。该技术已成功应用于一种海上机动舰船物理场测量系统中。

A new approach for locating a vessel on the surface or underwater using magnetic signature is presented. A vessel model of ellipsoid and magnetic dipole for a vessel is set up. The location information between a sensor and target,co-operative or non-co-operative ,will be obtained using two or more than two magnetic sensors. This informafion has been collected when the vessel passes by. Simulating target location is obtained using data both from this model and practical measurement on the sea. The performance is more accurate than the passive acoustic location method. The result is stable and reliable. This model is successfully applied to a transportable physical field signature ranger.