文档介绍：华中科技大学
硕士学位论文
环型磁通门传感器的研究与设计
姓名:刘腾飞
申请学位级别:硕士
专业:软件工程
指导教师:杨晓非
2010-05-27
华中科技大学硕士学位论文
摘要
本文在调研了大量磁通门传感器相关资料的基础上,阐述了磁通门传感器的分类
和基本原理。根据法拉第电磁感应原理建立了单棒型和环型磁通门传感器的数学模
型。选择钴基非晶合金作为磁通门传感器的磁芯材料,玻璃微晶陶瓷为磁芯骨架和绕
线筒的材料,设计并制作了一维开环环型磁通门探头,选择了二次谐波法作为磁通门
感应信号的检测方法。设计并完成了与探头相匹配的驱动电路,以作为磁
通门探头的激励频率,使磁通门传感器能够正常工作,反映探头轴向外界磁场强度。
设计并完成了磁通门传感器测试系统,并利用此系统对所设计的磁通门传感器进行了
定标。
定标结果表明,设计的磁通门传感器的量程为±,满量程线性度误差为
%,分辨力为 100nT,达到了预定目标。对设计的磁通门传感器进行了噪声分析,
分析表明:磁通门探头的制作过程中磁芯的选择和探头的制备工艺为影响磁通门传感
器性能的主要因素;感应信号中的基波分量和三次谐波分量为最大的干扰信号;激磁
信号频率不单一性也会增大探头输出的噪声。本文给出了一些抑制磁通门探头噪声的
方法。
在对本次设计的磁通门传感器做细致总结和讨论的基础上,给出了提高磁通门传
感器性能的改进方案,并提出了制作高精度三维磁通门传感器的一些建议。

关键词: 磁通门传感器, 开环, 二次谐波法, 噪声分析, 磁测量系统

I
华中科技大学硕士学位论文
Abstract
This paper describes the basic principles and classification of fluxgate sensor under a
large amount of relative research. Mathematic models of single-rod and ring-core fluxgate
can be established based on Faraday's ic induction principle. A
one-dimensional open-loop ring-core ometer is established with Co-based
amorphous alloy for the core material, and with machinable glass material for support. The
second harmonic analog method is applied to measure the sensor signal. Drive circuit
generates a square wave at the frequency of kHz, which drives the sensor to operate
at its best, and finally output a signal that is in proportion to the measured ic field.
Afterwards a measuring system is setup and applied to calibrate the sensor.
The calibration result shows that the scheduled goal for the ometer is achieved
with a measuring range of ± Gs, and a full scale linearity error of %, and the
sensitivity of can be seen from the noise analysis that the core material and the
construction of the sensor are the main factors that affect the performance of the
ometer. The first and the third ponents interference output signal
mostly. Besides plexity of the drive signal can also increase the outpu