三维磁阻式电子罗盘的设计与实现

Design and Implement of 3-axes Magnetoresistive Electronic Compasses

所设计的三维磁阻式电子罗盘的硬件方面是由三维磁阻传感器HMC5883l(深圳市凡高科技有限公司)、三维加速度传感器ADXL345B(深圳市创联发科技有限公司)以及微处理器MCU LPC1114FBD48(NXP公司)所组成,来测定系统的航向角、俯仰角和翻滚角。软件方面,通过对误差来源的分析,提出了椭圆拟合误差校正方法,来消除影响罗盘测量精度的误差,实现了高精度、运行稳定的三维电子罗盘。

A 3-axes magnetoresistive electronic compass in this paper which consists of 3D magnetoresistive sensor HMC58831, 3D acceleration sensor ADXL345B and MCU LPC1114FBD48 for measuring heading angle,pitch and roll angle in the part of the hardware.Sources causing errors are analyzed in this paper,then ellipse fitting error compensation method is pro- posed for avoiding error that affecting measurement accuracy of electronic compass in the software,characteristics of the 3-axes electrical compass are high accuracy and stable operation.