基于数字磁力检测仪的磁罗经自差校正方法

Magnetic Compass Autodyne Rectifying by Digital Magnetic Detector

为了能使船舶在锚泊或停靠码头的状态下就能实现磁罗经自差校正的目的,通过安装在罗盆底部的一种数字磁力检测仪测量并存储船舶正常航行时3个航向磁罗经自差力的大小与方向,在校正自差时利用存储的数据可计算出半圆自差系数和象限自差系数,完成磁罗经自差的校正工作。从理论上论述了依靠数字磁力检测仪校正磁罗经自差的原理,阐述了数字磁力检测仪组成以及船舶在锚泊或停靠码头时利用数字磁力检测仪校正自差的方法。经过实践验证了校正方法的正确性,用计算机及传感器技术为磁罗经自差校正提供一种高效便捷方法,节省时间和费用。

In order to rectify magnetic compass deviation at anchor or berth, a digital magnetic detector is installed in advance at the bottom of the compass basin to measure and store the quantity and direction of ship magnetic forces at three headings during normal vessel navigation. When rectifying the deviation, the coefficients of semi-circular deviation and the quadrant deviation can be calculated with the stored data. The rectifying principle of magnetic compass deviation by digital magnetic detector is discussed theoretically; the rectifying method during ships at anchor or berth is introduced. The correctness of the rectifying method is validated by practice. It is an efficient and convenient way to rectifying magnetic compass deviations by computer and sensor technology.