磁场感测器与使用该磁场感测器的电子罗盘;MAGNETIC SENSORS AND ELECTRONIC COMPASS USING THE SAME

摘要

一种磁场感测器与使用该磁场感测器的电子罗盘，此磁场感测器用以感测于一第一参考座标系上各座标轴的磁场分量，且第一参考座标系是与该磁场感测器相关联。其中，当磁场感测器在该第一参考座标系上其中一座标轴A的灵敏度不同于其他座标轴上的灵敏度时，该座标轴A上的磁场分量Am可用以下的方程式进行修正：Am=Am(n-1)×(Wa-1)/Wa+Am(n)×1/Wa...........(A);其中，Am(n)是指当下所量测到的沿着该座标轴A的磁场分量，Am(n-1)是指前一次所量测或计算的沿着该座标轴A的磁场分量，Wa则为一权重值。 A magnetic field sensor and the electronic compass using the same are provided. The magnetic field sensor is configured to sense the magnetic field component of each axis on a first reference coordinate system, and the first reference coordinate system is associated with the magnetic field sensors. When the sensitivity of an axis A of the magnetic field sensor in the first reference coordinate system is different from the other axis, the magnetic field component Am on the axis A is corrected using the following equation: Am = Am(n - 1) × (Wa - 1)/Wa + Am(n) ×;Therefore, the Am(n) is referred to a current measured magnetic field component along with the axis A, the Am(n-1) is referred to the previous measured or calculated magnetic field component along with the axis A, and the Wa is a weight value.