适用于舰船钢板地电流检测的新型磁场测量仪器设计

A Novel Magnetic-Field Measurement Apparatus Design Applied in Ground Current Testing of the Steel Plate in Vessels

舰船钢板地电流的检测在国内还处于起步阶段,这与日益发展的地电流干扰研究不相符。基于地电流因集肤效应而分布于钢板表面,钢板表面磁场为面电流密度的近似结论,本文设计了一种适用于舰船钢板地电流检测的磁场测量仪器。专门设计的置位/复位电路及地磁和桥偏移电压补偿电路提高了系统性能的稳定性,增强了抗干扰的能力。该仪器为地电流干扰研究提供了一种有效的实验检测手段和验证方法,具有重要的工程应用价值。

The research on the steel plate ground current measurement in vessels is still in the start stage in the domestic country. It does not keep up with the development of the study on steel plate ground current interference. Based on the approximation of the surface distribution of the ground current due to the skin effects and of the equivalence between the surface magnetic field and surface current density, this paper designs a novel magnetic field measurement apparatus which is applied to the test of the ground current. The exclusive design of the set/reset circuit and the compensation construction improves the stability of the system performance, and strengthens the ability of anti-interference. This apparatus acts as an effective approach to verify the validity of the ground current interference research. This achievement is highly significant for engineering application.