第1页共26页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第1页共26页摘要指南针是一种重要的导航工具，可应用在多种场合中。电子指南针内部结构固定，没有移动部分，可以简单地和其它电子系统接口，因此可代替旧的磁指南针。并以精度高、稳定性好等特点得到了广泛运用。本文介绍了目前用于定位系统中的电子指南针的工作原理，详细论述了磁场传感器芯片KMZ52的工作原理，给出了用KMZ52磁场传感器设计电子指南针的总体设计方案和电路，同时给出了设计中的一些特殊处理方法。Philips公司生产的半导体器件KMZ52是一种专门用于电子指南针的二维磁场传感器。它采用磁场传感器的磁阻（MR）技术，并用翻转技术消除信号偏移，而用电磁反馈技术来消除温度的敏感漂移。由于外界存在干扰，该系统集成了几种特殊的抗干扰技术来提高系统精度。关键词：电子指南针；磁场传感器；KMZ52Acompassisanimportanttoolfornavigationapplicationonmanyoccasions.Electroniccompassinternalstructure,withnomovingparts,cansimplyandotherelectronicsysteminterface,soyoucanreplacetheoldmagneticcompass.Andwithhighaccuracy,goodstabilityetcwidelyused.Thepaperintroducesthepositioningsystemforelectroniccompassworkprinciple,themagneticfieldsensorsarediscussedindetailKMZ52chipsworkingprinciple,andgivesKMZ52magneticfieldsensorsinthedesignofelectroniccompassoveralldesignschemeandcircuitdesign,andpresentssomespecialtreatment.PhilipscompanyproductionofsemiconductordevicesKMZ52isakindofspecialusedinelectroniccompass2dmagneticfieldsensors.Itadoptsmagneticsensormagnetoresistance(MR)technology,andreversetechnique,andeliminationofelectromagneticsignalmigrationtechnologytoeliminatethefeedbackissensitivetotemperaturedrift.Duetoexternaldisturbance,theexistingsystemintegrationofseveralspecialanti-interferencetechniquestoimprovethesystemprecision.Keywords:electroniccompass,Themagneticfieldsensors,KMZ52第2页共26页第1页共26页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第2页共26页目录摘要..................................................................................................................................................1目录..................................................................................................................................................2一方案的论证与比较..................................................................................................................3方案一：利用一维磁阻微电路芯片HMC1052感应磁场.......................................................3方案二：使用霍尼韦尔HMC1022各向异性磁阻传感电路..................................................4方案三：采用Philips公司生产的KMZ52感应磁场............................................................5二相关物理量介绍......................................................................................................................61.磁场.......................................................................................................................................62.磁感应强度...........................................................................................................................73.磁通量...................................................................................................................................74.磁场方向...............................................................................................................................75.磁感线............................................................................
