巨磁阻效应器件是德国西门子公司研制生产的一种新颖的磁敏传感器,与传统的金属薄膜磁阻相比,其在弱磁场下的灵敏度更高,有效检测距离高达２５毫米;该磁阻传感器与检测磁场的大小无关,仅对磁场的方向非常敏感。因而特别适合于制作角度编码器、无接触电位器,也可用于ＧＰＳ导航? Giant magnetoresistive effect device is a novel magnetic sensor developed and produced by Siemens of Germany. Compared with the traditional magnetoresistive of metal film, its magnetism resistance is higher under the weak magnetic field and the effective detection distance is up to 25mm. The magnetoresistive The sensor has nothing to do with the size of the detection magnetic field, but is very sensitive to the direction of the magnetic field. It is particularly suitable for the production of angle encoder, contactless potentiometer can also be used for GPS navigation?