基于ZigBee技术的无线数据采集系统 - 图文

江 苏 大 学 硕 士 学 位 论 文

摘 要

数据采集技术是信息科学的一个重要分支，它与传感器技术、信号处理技术以及计算机技术共同构建了现代检测技术的基础。本文在分析了数据采集系统的相关现状以及主要短距离无线通信技术的基础上，针对有线数据采集方式综合成本高、不易扩展、移动性差等缺陷，设计并实现了一个基于ZigBee技术的低成本、低功耗的无线数据采集系统。ZigBee 技术是一种近距离、低复杂度、低功耗、低速率、低成本的无线通信技术，工作在 2.4 GHz 的 ISM频段上，传输速率为 20 kb/s- 250 kb/s, 传输距离为10m~75m，主要用于短距离无线传输，将ZigBee技术与数据采集技术相结合，具有广泛的应用前景。

本课题基于当前数据采集系统的发展要求，以工业现场数据采集为目的，通过对ZigBee技术的研究（包括技术参数、网络组织结构， ZigBee2006协议），采用基于ZigBee技术的无线单片机CC2430（SOC），设计并实现了无线数据采集节点的硬件电路。硬件模块主要由无线传输模块和测试模块两部分组成，其中无线传输模块完成节点间的无线通讯，测试模块包括了RS232、电源、键盘及OLED显示屏，主要用于选择功能、检测网络状态等。结合硬件电路的特点以及整个系统的功能要求，本研究开发了系统的下位机软件与上位机软件。下位机软件包括协调器节点及一般终端节点的软件设计，建立一个低功耗、低时延的ZigBee星型网络。上位机软件采用Borland C++ Builder 6.0(简称 BCB)编写，实现网络中节点监控，包括数据采集与处理，实时曲线以及历史曲线的绘制，数据保存等功能。

通过ZigBee终端节点对现场数据的采集、ZigBee终端节点与协调器节点的通信， ZigBee模块的相关参数及组网参数的测试，验证了本设计方案的正确性，说明了ZigBee技术与数据采集技术相结合可以克服有线数据采集系统的弊端。

关键词：数据采集，无线通信，ZigBee技术，CC2430，C++ Builder

I

江 苏 大 学 硕 士 学 位 论 文

ABSTRACT

Data acquisition is an important branch of information technology and is the foundation of modern measurement technology together with sensor technology, signal processing technology and computer technology. Based on the research situation of data acquisition system and the main short-range wireless communication technology, a wireless data acquisition system based on ZigBee technology which has the features of low price and low power consumption was designed and realized aiming at solving the disadvantages of high price, unease extension and poor mobility of wired data acquisition. ZigBee technology is a bidirectional wireless communication technology with the features of short distance, low complexity, low power consumption, and low bit rate. It works at 2.4GHz ISM frequency, and its transmission rate is about 20kb/s-250kb/s, So ZigBee technology is mainly applied to short distance wireless communication. Data acquisition system which combines with ZigBee technology has a wide application prospect.

This thesis based on the development requirement of current data acquisition system, take industry field data acquiring as a goal, through researching on ZigBee technology (technique parameters, features, network topologies, and ZigBee2006 protocol). It using wireless single chip microcomputer CC2430 based on ZigBee technology, designs and realizes the hardware circuit of the ZigBee nodes. The hardware circuit has two parts including wireless transmitting module and testing module. The wireless transmitting module mainly accomplishes wireless data transmission. And the testing module including RS232 circuit, power circuit, keyboard circuit, and display circuit, mainly accomplishes function choice and network state detection. According to the circuit characteristics and the function requirements of the whole system, the lower computer software and the upper computer software is designed and accomplished in the research. The lower computer software including the software design of coordinator node and general terminal node in star network, realizes ZigBee star network building with the features of low power consumption and low delay. The upper software programming using Borland C++

II

江 苏 大 学 硕 士 学 位 论 文

Builder 6.0 accomplishes the function of monitoring the node state in the network including data acquiring and processing, curve-drawing, data-saving, and so on.

This design is verified by field data acquisition of ZigBee terminal nodes, communication between ZigBee terminal nodes and coordinate nodes, relative parameters and networking parameters of Zigbee modules, which suggests that disadvantages of the wired data acquisition system can be overcome through the combination of Zigbee technology and data acquisition technology.

Keyword: data acquisition, wireless communication, ZigBee CC2430, C++ Builder

III technology,

江 苏 大 学 硕 士 学 位 论 文

目 录

摘 要 ..............................................................................................................................I ABSTRACT .....................................................................................................................II 目 录 ........................................................................................................................... IV 第一章 绪论 .................................................................................................................... 1

1.1课题的背景 .......................................................................................................... 1

1.2短距离无线技术的发展现状 ................................................................................. 1

1.2.1 IEEE 802.11标准 ........................................................................................ 2

1.2.2 蓝牙技术 ................................................................................................... 2 1.2.3 IrDA通信技术 ........................................................................................... 2 1.2.4 HomeRF ..................................................................................................... 3 1.2.5 ZigBee技术.................................. …… 此处隐藏：7336字，全部文档内容请下载后查看。喜欢就下载吧 ……