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摘要随着信息技术发展的需要,对各种现场数据的实时采集和处理成为现代工业控制和科学研究的重要组成部分。本文所研究的微型计算机数据采集系统,又称为基于嵌入式的数据采集系统,以其采样频率高、处理速度快的优点得到了迅速的发展。64803
首先,本文简要介绍了课题的研究背景及意义,阐述了微型计算机数据采集系统的国内外发展现状,并针对当今数据采集系统的需求提出了一种基于ARM9内核微控制器S3C2440A的数据采集系统的设计,在此基础上,分析了系统的特点并对其进行了总体设计规划。
其次,在数据采集系统总体规划的基础上详细设计了硬件开发平台和软件。硬件开发平台的核心采用高速微控制器S3C244OA,并设计了其外围接口电路,以实现8通道的模拟信号采集和最高可达100KSPS的采样频率;软件上借助于实时操作系统Linux和图形用户接口Gt,增强了系统的实时性和友好的人机交互特性。整个系统可实现电压值的显示，硬件与软件均采用模块化设计,层次结构分明,保证了系统具有良好的可移植性和可维护性。
最后,对整个系统的性能测试,结果表明本系统满足数据采集系统的功能要求和性能要求。主要内容完成后,论文对全文所做的工作进行总结以及下一步工作进行展望。
毕业论文关键词: ARM9, S3C2440A, 数据采集系统, Linux操作系统， Gt
毕业设计说明书（论文）外文摘要
Title THE DESIGN OF ARM9-BASED RADIOMETER DATA QCQUISITION SYSTEM
Abstract With the development of information technology, acquiring and processing real-time field data have become an important part of modern industrial control and scientific research. Micro-computer data acquisition system, also as embedded data acquisition system, with the advantage of high sampling frequency and fast processing speed，has a particularly prominent development.
Firstly, this paper introduces research background and significance of the subject, describes domestic and foreign development status of micro-computer data acquisition system, and proposes a data acquisition system design based on S3C2440A with ARM9 core for the needs. On this basis, the paper analyzes the characteristics of the system and proposes an overall design and planning.
Secondly, the data acquisition system does a detailed design of hardware and software development platform based on the overall planning. Hardware development platform selects high-speed micro-controller S3C2440A as its CPU, whose external interface circuit is designed to achieve the 8-channel analog signal acquisition and sampling frequency up to 100SPS. Software design adopts real-time operating system Linux and graphical user interface Gt to enhance the system’s real-time and friendly interactive features. The whole system can realize Voltage value. Because the hardware and software both adopt modular design, the system is hierarchical structured to ensure that the whole system has good portability and maintainability.
Finally, the paper makes a test of the overall system performance, and the results show that the system meets the function requirements and performance requirements of data acquisition system.
KEY WORDS:ARM9, S3C2440A, Data Acquisition System, Linux, Gt
目次
1. 绪论 1
1.1 课题背景及意义 1
1.2 国内外研究现状 1
1.3 论文组织结构 2
2 辐射计原理 2
2.1 辐射测量 2
2.2 辐射计体制 3
2.3 性能比较及体制选择