基于频域数字反卷积的磁场测量技术

车辆及舰船的磁场是超低频交变弱磁场。测量车辆和舰船的近场磁场分布是研究车辆或舰船磁场特征的基础。介绍了将频域数字反卷积算法应用到交变弱磁场测量, 用软件积分取代模拟积分器, 不但简化了磁场测量仪器的硬件, 同时用系统的冲激响应修正了系统的固有误差。基于此原理研制的车辆磁场测量系统验证了这种测量方法的可行性与准确性。
关键词: 数字反卷积; 磁场测量; 磁感应传感器
Abs tra c t: M agnet ic f ield of ground veh icles and w arsh ip s is u lt ra low 2f requency, alternate and feeb le. M agnet ic pat tern s f rom a moving target p rovide the basic fo r research ing the character a moving target. In th is paper, a m easu rem en t m ethod of target m agnet ic f ield is discu ssed based on digital deconvo lu t ion in f requency dom ain. The hardw are of the in st rum en t is rep laced by sof tw are. The inheren t erro r of the sys2
tem is co rrected by the impu lse respon se. N um erical sim u lat ion s validate the theo ret ical resu lt s and show that the m easu rem en t system has an accu racy very clo se to the fact.
Ke y w o rds: digital deconvo lu t ion; m agnet ic f ield m easu rem en t; m agnet ic induct ion sen so r