一、概述随着工业自动化和电子计算机技术的发展,对许多物理量,如电流、电压、电功率、位移、速度、流量、压力等,需要非接触性的测量,这就需要大量的传感器。其中一种重要的方法,就是磁传感器,它是一种利用磁场作媒介的传感器,它与其他传感器相比,稳定可靠,寿命长,对上述物理量几乎都可以测量,因此磁传感器越来越引起人 I. Overview With the development of industrial automation and computer technology, non-contact measurement is required for many physical quantities such as current, voltage, electric power, displacement, speed, flow, pressure and the like, which requires a large number of sensors. One of the most important methods is the magnetic sensor, which is a kind of sensor that uses the magnetic field as a medium. Compared with other sensors, it is stable and reliable and has a long life. Almost all the above physical quantities can be measured. Therefore, the magnetic sensor is more and more caused people