To provide a ship-based demagnetizer capable of maintaining a magnetic signature in an almost best form by adjusting a demagnetizing current of the sound demagnetizer without using a magnetic sensor when some of the demagnetizers fail.SOLUTION: A storage unit 11 stores an ideal magnetic field neutralizing residual magnetism in permanent magnetic portion of a hull and a demagnetization coil effect of each of a plurality of demagnetizers 20. A magnetic field calculator 13 calculates present magnetic field occurring due to the remaining demagnetizers 20 based on a current flowing to a demagnetization coil of the remaining demagnetizers 20 and the demagnetizing coil effect when some of the plurality of demagnetizers 20 fail. A compensation demagnetizing current value calculation unit 14 calculates the difference between the ideal magnetic field and the present magnetic field when a failure occurs in one portion of the plurality of demagnetizers 20, and calculates a complementary demagnetizing current value of the remaining demagnetizers 20 necessary in order to come close to the ideal magnetic field based on the demagnetizing coil effect. A command unit 15 transmits a control signal according to the complementary demagnetizing current value to the remaining demagnetizers 20.SELECTED DRAWING: Figure 1
【課題】一部の消磁装置が故障した場合に、磁気センサを用いずに健全な消磁装置の消磁電流を調整して、磁気シグネチャを最適に近い形で維持できる艦載消磁装置を提供する。【解決手段】記憶部11は、船体の永久磁気分の残留磁気を中和する理想磁場と、複数の消磁装置20それぞれの消磁コイル効果とを予め記憶する。磁場演算部13は、複数の消磁装置20の一部が故障した場合に、残りの消磁装置20の消磁コイルに流れる電流と消磁コイル効果とに基づいて、該残りの消磁装置20により発生している現状磁場を演算する。補完消磁電流値演算部14は、複数の消磁装置20の一部が故障した場合に、理想磁場と現状磁場との差と、消磁コイル効果とに基づいて、理想磁場に近づけるために必要な残りの消磁装置20の補完消磁電流値を演算する。指令部15は、補完消磁電流値に応じた制御信号を残りの消磁装置20へ送信する。【選択図】図1
SHIP-BASED DEMAGNETIZER
艦載消磁装置
2020-06-18
Patent
Electronic Resource
Japanese