为了提高基于地磁检测的定向精度,通过引入高精度步进电机控制,设计了一种新型的磁定向系统。该系统只需要一个传感器输出确定方向,可以规避和降低传统设计的一些误差源,提高精度;结合系统设计,研究了适用于新型设计的定向算法,实验测试表明,该定向方法有着较高的精度和较好的稳定性。
In order to improve the direction accuracy, a new magnetic direction finding system is designed through adopting high precise stepper motor. The system only needs one GMR magnetic sensor's output. The design could avoid or decrease some error source of the traditional compass design. To accompany the system design, a new algorithm based on least square technique was researched for determine the direction. Engineering experiment proved that the direction finding method is well accurate and stable.