車輛及艦船的磁場是超低頻交變?nèi)醮艌觥y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(chǔ)。介紹了將頻域數(shù)字反卷積算法應(yīng)用到交變?nèi)醮艌鰷y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(tǒng)的沖激響應(yīng)修正了系統(tǒng)的固有誤差。基于此原理研制的車輛磁場測量系統(tǒng)驗(yàn)證了這種測量方法的可行性與準(zhǔn)確性。
關(guān)鍵詞: 數(shù)字反卷積; 磁場測量; 磁感應(yīng)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