摘要
介绍一种基于GMR传感器和加速度传感器的三轴数字指南针系统及实现,采用LM2904放大器完成信号调理,应用ARM11架构的微处理器S3C6410完成A/D转换、方位角计算及数字化输出等;应用QT实现友好的用户交互界面。着重论述数字指南针的工作原理、硬件及软件的实现,分析磁性物质影响所带来误差,并提出可行性的矫正方案。实验表明:该数字指南针能够准确测出方位航向角,且实时性好、功耗低、运行稳定,可用于普通导航领域。
This paper introduces a three axis digital compass system based on GMR and acceleration sensors. The system uses the high-precision amplifier LM2904 as the signal conditioning circuit, the low power, high frequency, ARM-based microprocessor S3C6410 to complete AD conversion, azimuth calculation and digital output. The QT is used to achieve a friendly user interface. The paper introduces the working principle of electronic compass realization of hardware and software design, proposes the feasibility correction scheme based on analysis of deviation caused by the influence of magnetic material. Experiments show that the electronic compass can accurately measure the azimuth angle, and good real-time performance, low power consumption, stable operation, and can be used for ordinary navigation field.
出处
《自动化与信息工程》
2014年第3期1-6,共6页
Automation & Information Engineering
