基于峰差法的磁通门磁探仪的研制  

Design of fluxgate magnetometer based on peak detection approach

作　　者：瞿少成[1] 李文通[1] 刘海洋[1] 田瑶[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》2010年第4期98-102,共5页Electronic Measurement Technology

基　　金：武汉市科技攻关计划(200810321132)

摘　　要：研究了一种基于峰差法的磁通门磁探仪系统。该系统由A Tmega8L单片机产生数字方波激励信号直接驱动磁通门探头,改善了传统RC模拟激磁电路的稳定性问题;用结构更加简单的峰值检波电路取代传统复杂的谐波法电路,简化了电路设计,并降低了系统功耗;采用16位专用ADC对磁通门输出信号进行采样,保证了系统的分辨率;为进一步控制系统温漂,增加了温度检测补偿模块。实验结果表明,该系统实现了预期功能,性价比较高,具有良好的推广价值。A novel fluxgate magnetometer system is introduced based on peak detection approach.To avoid stability problem caused traditional RC analog drive circuit,digital square-wave signal from ATmega8L MCU is applied to directly drive the fluxgate sensor,which improve efficiently the stability of the system.By replacing complex harmonic circuit by peak detection approach,the design of circuit is simplified and power consumption is reduced.Furthermore,the system resolution factor is guaranteed by sampling the fluxgate signal with special ADC（16 bit）.In addition,the temperature compensating circuit is added to reduce the temperature drift.Finally,experiment results show that the systems achieve all technical requirements,and its have good engineering value.

关 键 词：数字激励 峰值检波 磁通门 温度补偿 A Tmega8L 

分 类 号：TM930.124[电气工程—电力电子与电力传动]