采用磁阻传感器与加速度计的电子罗盘设计  

Design of Electronic Compass with Magnetoresistive Sensor and Accelerometer

作　　者：徐晓东[1] 赵忠[1] 李丽锦[1] 

机构地区：[1]西北工业大学自动化学院,陕西西安710072

出　　处：《兵工自动化》2005年第5期21-22,共2页Ordnance Industry Automation

基　　金：西北工业大学研究生种子基金资助项目(M016627)

摘　　要：基于磁阻传感器与加速度倾角计的电子罗盘由微控制器实现角度换算与输出。16位计数器对加速度计输出脉宽信号中断计数,磁阻传感器3轴输出的差分信号转换均由24位A／D直接转换,全部实现信号无缝直连。利用磁阻芯片的置位／复位电流带通的正反脉冲消除系统温度漂移及偏移,其软件以数字低通滤波器滤除随机干扰。For the electronic compass based on magnetoresistive sensor and accelerometer, angle conversion and output is realized by microcomtroller. The 16-bit counters in the system are adopted to count the pulse-width of the signal that is outputted directly by the accelerometer through interrupt counting. The conversion of difference signal outputted by the three axles of magnetoresistive sensor is realized via 24-bit A/D. And the temperature drift and offset of the system is compensated with bi-directional current pulse through the set/reset strap in magnetoresistive sensor. On software, a digital low-pass filtering is used to cancel random interference

关 键 词：电子罗盘 磁阻传感器 加速度计 系统芯片 

分 类 号：TP212.13[自动化与计算机技术—检测技术与自动化装置] V241.611[自动化与计算机技术—控制科学与工程]