一种基于磁阻传感器的数字罗盘的设计

Design of a Digital Compass Based on Magnetoresistance Sensors

基于地磁测量原理设计的数字式磁罗盘,具有体积小、启动快、功耗低等优点,现代测控技术对测向传感器提出了更高的要求;为提高数字罗盘的精度,设计了一种基于磁阻传感器的数字磁罗盘;在分析相关产品的基础上,着重对电源、器件选型、信号调理电路、软件设计等方面进行了分析研究,设计了数字罗盘并研制了试验样机;为验证设计效果,在双轴陀螺测试转台上进行了测试,试验结果初步验证了该设计方案的可行性;论文的研究工作可为研究和提高数字式磁罗盘的测量精度提供参考。

The digital geomagnetic compass based on geomagnetism measurement has characteristics with very small size, low power consumption and start up quickly, and the modern measurement ＆ control technology advances higher requirements for heading sensors. In order to advance the accuracy of the digital compass, a digital compass based on magnetoresistance sensors is studied. After some relative compass products being analyzed, the design scheme of compass power, signal processing circuit and software related with accuracy of compass is proposed emphatically. Then a compass prototype is developed. Some experiments are done using two-axis turntable. The results show that the design scheme of the prototype is feasible. And the work herein can be referenced for further research on the accurate digital compass.