三分量磁通门数字磁罗盘研制  

Design of three axis fluxgate digital magnetic compass

作　　者：李文通[1] 瞿少成[1] 陈婵[1] 

机构地区：[1]华中师范大学信息技术系,武汉430079

出　　处：《电子测量技术》2011年第3期12-15,共4页Electronic Measurement Technology

基　　金：国家自然科学基金资助项目(61074046/F030107);华中师范大学中央高校基本科研业务费专项资金资助

摘　　要：介绍了一种三分量磁通门数字磁罗盘系统的设计。基于磁罗盘利用地磁定向的基本原理,以磁通门传感器与双轴倾斜角传感器为核心,运用Atmega16L微处理器直接产生数字方波激励信号驱动磁通门探头,以峰值检波法提取磁通门信号,改善了传统RC模拟激磁电路的稳定性问题;通过采用三通道16位ADC对磁通门输出信号进行采样,并直观地输出相关测量信息,保证了系统的测量精度。实验结果表明,系统精度较高、稳定性好且噪声小,该设计已成功应用于某型数字磁罗盘。A novel fluxgate digital magnetic compass system is introduced based on fluxgate technology and two axis dip angle sensor.The algorithms of magnetic compass orientation technology are introduced.The principle of peak detection approach and the approach of digit driver is researched.To avoid stability problem caused traditional RC analog drive circuit,digital square-wave signal from the MCU is applied to directly drive the fluxgate sensor.Furthermore,the system resolution factor is guaranteed by sampling the fluxgate signal with special ADC（16bit）.It has already been successfully applied to some type of digital magnetic compass.

关 键 词：磁通门 数字激励 峰值检波 磁罗盘 

分 类 号：TP212.13[自动化与计算机技术—检测技术与自动化装置]