介绍了一种新的地磁定向系统的组成及其工作原理,利用巨磁阻传感器,测量地磁场,实现定向。由于巨磁阻传感器的一些特性不满足测量要求,对其进行了改进,设计了地磁定向系统,得到了测试数据。数据中含有一定的噪声,利用小波对其进行去噪处理,提取地磁场信号特征,进而实现快速准确定向,最后简单分析了该定向系统的应用前景。
A newly developed geomagnetic orientation system is introduced in this paper.The constitution and theory of the system are presented.We get the data of geomagnetic field by the GMR sensor.For some character of GMR can not fulfill the need of measurement,we improve some character of the sensor.Because of the complex noise in the signal,we use wavelet method to decrease the noise s.In the end,we briefly describe the application and the prospect of the orientation system.