【正文】 基于 GPRS 無線數(shù)據(jù)采集與傳輸系統(tǒng)設計 摘要 摘要： GPRS（通用分組無線電業(yè)務）是使用包交換的概念發(fā)展來的一種無線信號的傳輸方式。 GPRS 信號不但擁有信號覆蓋范圍較廣、信號傳輸數(shù)據(jù)速度較快、數(shù)據(jù)傳輸質(zhì)量較高、能夠?qū)崿F(xiàn)實時在線以及費用按流量計算的優(yōu)點，且每個 GPRS 就是一個分組性的數(shù)據(jù)網(wǎng)絡，同時 GPRS 能夠支持 TCP/IP 協(xié)議，因此其可以直接與 Inter 連通。因此， GPRS在便攜型環(huán)境檢測設備、交通道路監(jiān)控設備、移動辦公以及無線上網(wǎng)等方面都有較為廣泛的應。 本文使用的是華為公司生產(chǎn)的一款雙頻段 EGSM900/GSM1800 的通信模塊GTM900C，其中嵌入了 TCP/IP 協(xié)議，并且通過 8 位單片機 AT89C51 單片機實現(xiàn)對GTM900C 的控制，進而實現(xiàn) GPRS 業(yè)務的數(shù)據(jù)傳輸。此系統(tǒng)的外圍電路較少，設計簡單，成本較低。 關鍵詞： 數(shù)據(jù)傳輸與接收 單片機 GPRS 通信系統(tǒng) Abstract Abstract： GPRS (general packet radio service) is to use the concept of packet switching the development of a wireless transmission. GPRS s not only has to cover range, data transmission speed, high quality, and always online munication according to flow billing, and a bit, and its itself is a group data works, support the TCP/IP protocol, can be directly and Inter munication. Therefore, GPRS is in wireless Inter and environmental monitoring portable type, traffic monitoring, mobile office, and other industries. GPRS is used in portable environmental testing equipment, traffic monitoring equipment, mobile office and wireless Inter access, and other is used in this paper is a munication module the Huawei produced GTM900C dualband EGSM900/GSM1800 which embedded TCP / IP are controlled by the 8bit microcontroller AT89C51 microcontroller, thus achieving GPRS services data transmission. This system is less peripheral circuits, simple design and low cost. Keywords： Data transmission and reception Singlechip, microputer, GPRS munication system 目錄 ............................................................................................................................................... 1 課題研究背景 ............................................................................................................................... 1 課題研究的目的和意義 ................................................................................................................. 1 2 系統(tǒng)設計構想 ................................................................................................................................. 2 系統(tǒng)總體結(jié)構 ............................................................................................................................... 2 單片機 ........................................................................................................................................ 2 GPRS 系統(tǒng) ................................................................................................................................... 2 數(shù)據(jù)采集系統(tǒng) ............................................................................................................................... 3 3 系統(tǒng)硬件設計 ................................................................................................................................. 4 AT89C51 單片機 ........................................................................................................................... 4 單片機最小系統(tǒng)電路 .................................................................................................................... 6 晶振電路 ................................................................................................................................... 6 復位電路 ................................................................................................................................... 6 信號處理電路 ............................................................................................................................... 6 數(shù)據(jù)采集電路 ............................................................................................................................... 7 GPRS 通信系統(tǒng) ............................................................................................................................ 8 通信系統(tǒng)硬件設計方案 .............................................................................................................. 8 GTM900CGPRS 模塊簡介 ......................................................................................................... 9 4 系統(tǒng)軟件設計 ............................................................................................................................... 10 軟件開發(fā)環(huán)境 ............................................................................................................................. 10 Keil uVision2 簡介 ................................................................................................................. 10 Proteus 7 簡介 ........................................................................................................................ 10 采集系統(tǒng)流程圖 ......................................................................................................................... 10 傳輸系統(tǒng)流程圖 ..........................................................................................................................11 GPRS 通信系統(tǒng)的軟件設計方案 ............................................................................................... 12 連接的建立 ............................................................................................................................. 12 數(shù)據(jù)處理 ................................................................................................................................ 13 5 實際應用 ...................................................................................................................................... 14 礦井風壓測量系統(tǒng)與 GPRS 傳輸 ................................................................................................. 14