Title    The study of speed measurement method based on the geomagnetic.  

Abstract Geomagnetic field as the Earth system's basic physics, directly affects all the kinematic characteristics of moving charged objects or objects with magnetic within the system. However, as the magnetic field is very weak, just about the order of magnitude 10-5T, the size and the accuracy of the measurement has certain difficulties. Magneto resistive sensor has been widely used with its high sensitivity and fast response. In this paper, under the ARM control, we achieve high-speed signal acquisition and storage work based on magneto resistive sensors. After the data processing, we achieve the air rigid body rotation velocity measurements, which can calculate the value of the magnetic field indirectly, and then significantly improve the measurement accuracy, which provide a guarantee for our country in geomagnetic navigation, military industry and other areas .65268

Keywords  magnetic measurement; magneto resistive sensor; ARM control; rigid speed

基于地磁的转速测量方法研究

摘要：地磁场为地球系统的基本物理场，直接影响着系统内所有运动的带电物体或带磁物体的运动学特征。但地磁场非常微弱，约在10-5T的量级上，为此测量其大小与测量精度方面具有一定的困难。磁阻传感器以其灵敏度高、响应速度快而得到了广泛的应用。本文以磁阻传感器为基础，通过ARM控制，实现信号的高速采集和存储工作。通过数据处理，实现对空中刚体旋转速度的测量，从而可以计算出地磁场的大小，同时在测量精度方面可以得到显著提高，为我国在地磁导航、军事工业等方面提供了保障。

毕业论文关键词：地磁测量;磁阻传感器;ARM控制;刚体转速

目录

1引言 1

1.1本文研究背景 1

1.1.1转速测量的意义 1

1.1.2转速测量的现状 1

1.2本人的主要工作 2

2测量方案的确定 3

2.1测量方案的选择 3

2.1.1测量参考系的选择 3

2.1.2测量地磁场的方法 3

2.1.3测量元件的选择 5

2.2地磁场的介绍 5

2.2.1地磁场的要素 5

2.2.2地磁场的变化 6

2.3磁阻传感器简介 7

2.3.1磁阻传感器原理 7

2.3.2HMC1052介绍 7

3实验器材的设计加工 10

3.1实验器材的需求 10

3.1.1步进电机的选择 10

3.1.2连接装置需求 10

3.2实验装置的设计 11

3.3实验器材的加工 14

4物体空中下落实验 16

4.1物体的空中下落姿态测量 16

4.2转速的标定过程 19

结论 20

致谢 21

参考文献 22

1 引言

1.1