【正文】 ，分布式基站則繼續(xù)強化靈活性，未來將扮演復雜無線環(huán)境的應用主角。 狹義的基站 ， 即公用移動通信基站是 無線電 臺站的一種形式，是指在一定的無線電覆蓋區(qū)中，通過移動通信交換中心，與移動電話終端之間進行信息傳遞的無線電收發(fā)信電臺。如此，使用者既可聯(lián)機上網(wǎng)，參加視訊會議等互動傳播，而且在同一個視訊網(wǎng)絡上 (VRN)的使用者，甚至可以無需通過撥號上網(wǎng)，而持續(xù)與網(wǎng)絡連接。 常規(guī)的防竊電手段都只是設置在用戶端，缺乏實時監(jiān)控，造成竊電證據(jù)不能及時采集，竊電者仍有可趁之機．對于某些內外勾結進行大肆竊電的非法行為，不能得到有效的控制 。 關鍵詞： GPRS MSP430F149 電壓控制 CAD ATT7022B Abstract The design of real— time monitoring system against electric larceny is discussed based on GPRS technology； and its framework， core hardware as well as methods for detecting and diagnosing electriclarceny are expounded in detail. Besides， the stability，reliability and merits of the system are also mentioned． The design makes the process from power supplier to consumers transparent and can prevent electric larceny with the full real— time information． The design is to reduce costs, expand the development of the scope and the system running stability, reliability, designed by MSP430F149 monolithic integrated circuits to control the voltage sensor to plete the temperature of the collection, the voltage in the number of ways in led display LED1602, achieve the voltage of the collection and display and police. The minimum temperature values based on actual requirements, the keyboard for set, for automatic temperature control and other function, and the hardware and software system of the programming process the design of hardware to constitute a part of six modules, power and resets the collected, the data acquisition module, thedata storage module, PC, the GTM900 module and module display module. MSP430F149 is a 16bit flash chips including the type of operation of a monolithic integrated circuits, the development of device easy, but the characteristics and programming for the control system design a great convenience., all modules of a schematic diagram of a circuit are CAD to plete. Key words: GPRS MSP430F149 voltage control CAD ATT7022B 目 錄 第 1 章 緒 論 .......................................................................................................................... 1 課題研究的目的意義 ..................................................................................................... 1 研究現(xiàn)狀 ....................................................................................................................... 1 基站的現(xiàn)狀及其發(fā)展趨勢 ........................................................................................ 2 論文研究內容及創(chuàng)新特點 .............................................................................................. 3 主要研究內容 .......................................................................................................... 3 主要創(chuàng)新特點 .......................................................................................................... 4 第 2 章 硬件模塊理論基礎 ..................................................................................................... 5 GTM900 系統(tǒng)簡介 ......................................................................................................... 5 產(chǎn)品定位 ................................................................................................................. 5 產(chǎn)品外形 ................................................................................................................. 5 邏輯框圖 ................................................................................................................. 7 產(chǎn)品應用 ................................................................................................................. 7 電氣特性 ................................................................................................................. 9 MSP430F149 單片機 .....................................................................................................10 MSP430F149 的組成 ...............................................................................................10 MSP430F149 的特點 .............................................................................................10 MSP430F149 的定時器及轉換模塊 .......................................................................... 11 電壓電流采集系統(tǒng) ........................................................................................................12 芯片特性 ................................................................................................................13 內部框圖 ................................................................................................................14 引腳描述 ................................................................................................................14 應用示意圖 ...........................................................................................................17 第 3 章 硬件部分 ..................................................................................................................18 總體方案的設計 ...........................................................................................................18 電源模塊設計 ...............................................................................................................19 計量工作電源 .........................................................................................................19 微處理器工作電源 ..................................................................................................20 復位模塊設計 ...............................................................................................................21 上電復位和電源電壓監(jiān)視 .......................................................................................22 硬件復位和軟件監(jiān)視 ..............................................................................................22 電參數(shù)計量的設計 ........................................................................................................22 ATT7022B 外圍硬件設計 .........................................................................