The invention provides an outboard magnetic field forecasting method and device for closed-loop demagnetization of a ship magnetic field, and the method comprises the steps: carrying out the modeling of the ship magnetic field, and enabling the modeling to be equivalent to x virtual magnetic sources M; 1 measuring points are selected in the ship, # imgabs0 # measuring points are selected outside the ship, and a three-component magnetic sensor is fixed to each measuring point; when the ship sails, the magnetic moment of the virtual magnetic source is changed for # imgabs 1 # times, and a first formula of the virtual magnetic source and the ship internal magnetic field and a second formula of the virtual magnetic source and the ship external magnetic field are obtained; according to the first formula of the virtual magnetic source and the ship internal magnetic field and the second formula of the virtual magnetic source and the ship external magnetic field, a third formula of the relation between the ship internal magnetic field and the ship external magnetic field is obtained through calculation; defining an internal and external magnetic field relation matrix SF of the ship to obtain a fourth formula of the expression of the SF; according to the fourth formula, the variation delta Hn of the magnetic field inside the ship can be measured, the corresponding variation delta Hw of the magnetic field outside the ship is predicted, and the magnetic field outside the ship is predicted.

    本发明提出一种舰船磁场闭环消磁的船外磁场预报方法和装置,该方法包括对舰船磁场进行建模,等效为x个虚拟磁源M;在舰船内部选择l个测量点,在舰船外部选择#imgabs0#个测量点,在每个测量点上固定一个三分量磁传感器;当舰船航行时,其虚拟磁源的磁矩变化#imgabs1#次,得到虚拟磁源与舰船内部磁场的第一公式和虚拟磁源与舰船外部磁场的第二公式;根据虚拟磁源与舰船内部磁场的所述第一公式和虚拟磁源与舰船外部磁场的所述第二公式计算得到舰船内部和外部磁场的关系的第三公式;定义舰船内部和外部磁场关系矩阵SF,得到SF的表达式的第四公式;根据所述第四公式,可通过测得舰船内部的磁场的变化量ΔHn,预测对应的艇外磁场的变化量ΔHw,进行舰船外部磁场预报。


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    Title :

    Outboard magnetic field forecasting method and device for closed-loop demagnetization of ship magnetic field


    Additional title:

    一种舰船磁场闭环消磁的船外磁场预报方法和装置


    Contributors:
    YI GUFENG (author) / ZHANG YIN (author) / ZHANG XIUZHI (author) / HU ZHIGANG (author) / LUO YIHAO (author) / GAN RUI (author)

    Publication date :

    2024-05-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B63G OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS , Angriffs- oder Verteidigungsanordnungen auf Schiffen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES




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