磁通门中的坡莫合金材料的磁滞回线的拟合

Fitting the Curve of Magnetic Hysteresis Loop of Ferromagnetic Material of Fluxgate

通常磁通门传感器中选用磁导率很高的坡莫合金作铁芯,为了给磁通门传感器建模,就必须拟合铁芯的磁滞回线,传统的方法是用多项式函数拟合,但需要大量的数据。本文采用分段反正切函数拟合,通过matlab仿真对这两种方法进行对比,发现在数据有限的情况下分段多项式拟合并不适用,而分段反正切拟合的仿真结果依然有效。

Usually permalloy is adopted to be used for core in fluxgate sensors. To model a fluxgate sensor, it is necessary to fit the magnetic hysteresis loops of permalloy in the sensor. Traditionally, polynomial fitting is employed. But this way needs a lot of available data. This paper introduces another way to fit-subsectional inverse tangent function fitting. Simulated the two ways of fitting by Matlab, the result reveals that polynomial fitting could not be employed and sectional inverse tangent function fitting is effective when available data is finite.