車輛及艦船的磁場是超低頻交變弱磁場。測量車輛和艦船的近場磁場分布是研究車輛或艦船磁場特征的基礎。介紹了將頻域數字反卷積算法應用到交變弱磁場測量, 用軟件積分取代模擬積分器, 不但簡化了磁場測量儀器的硬件, 同時用系統的沖激響應修正了系統的固有誤差。基于此原理研制的車輛磁場測量系統驗證了這種測量方法的可行性與準確性。
關鍵詞: 數字反卷積; 磁場測量; 磁感應傳感器
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