专利名称：Magnetic transducer
发明人：Friedrich J. Esper,Gottfried Meudt申请号：US06/097843申请日：19791127公开号：US04503348A公开日：19850305
摘要：An electromagnetic transducer which generates signals on the basis of theBarkhausen effect under periodically alternating externally applied magnetic switchingfields. Prior to use, the magnetic sensor element, for example a ferromagnetic wire, ispre-magnetized by undergoing a program which subjects the wire to a coercive appliedfield substantially higher than the alternating interrogation field. The coercive fieldplaces different zones of the wire into magnetic saturation with varying relative polarity,thereby creating two or more zones of different magnetization. When subjected to thealternating, low intensity interrogation field, sensor coils detect a high level, bipolaroutput signal.
申请人：ROBERT BOSCH GMBH
代理机构：Frishauf, Holtz, Goodman & Woodward
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