地磁传感器原理 地磁传感器的优点

Release time：2022-10-31
author：Ameya360
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　　地磁传感器可用于检测车辆的存在和车型识别。数据采集系统在交通监控系统中起着非常重要的作用，地磁传感器是数据采集系统的关键部分，传感器的性能对数据采集系统的准确性起决定作用。接下来，Ameya360电子元器件采购网详细为你说下地磁传感器原理，地磁传感器的优点。

地磁传感器原理 地磁传感器的优点

　　1.地磁传感器原理

　　各向异性磁阻传感器由薄膜合金( 透磁合金) 制成，利用载流磁性材料在外部磁场存在时电阻特性将会改变的基本原理进行磁场变化的测量。当传感器接通以后，假设没有任何外部磁场，薄膜合金会有一个平行于电流方向的内部磁化矢量。

　　“地磁传感器”的工作原理是当驾驶员将车辆停在车位上，“地磁传感器”将自动感应车辆的停车时间，将时间传送到中继站进行计费，市民直接用银行卡在POS机上缴费。同时利用该设备摄像功能，不交费的车辆进行拍照，并将这些车辆信息录入有关网站，对逃费车辆采取一定措施。

　　2.地磁传感器的优点

　　1．安装、维修方便，不必封闭车道、对路面破坏小，当在检测点吊架或侧面安装时不用破坏路面,

　　维修时只需检查地磁传感器即可；检测点不易遭到破坏，不受路面移动影响；

　　2．地磁传感器是利用地球磁场在铁磁物体通过时的变化来检测，所以它不受气候的影响；

　　3．通过对灵敏度的设置可以识别铁磁性物体的大小，可以大致判断出车辆的类型；

　　4．对非铁磁性物体没有反应，因此可以有效地减少误检。


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