本文選題：應(yīng)急通信 + 嵌入式系統(tǒng)��； 參考：《電子科技大學(xué)》2012年碩士論文

【摘要】：隨著世界各地頻繁出現(xiàn)地震、海嘯、恐怖襲擊、傳染性疾病等各種自然災(zāi)害和大型公共事件，使國家和人民生命財產(chǎn)遭受重大損失，為達(dá)到有效地組織災(zāi)害救援急需一個快速響應(yīng)、全面高效的應(yīng)急寬帶無線通信系統(tǒng)。應(yīng)急手持終端作為應(yīng)急寬帶無線通信系統(tǒng)的組成部分，對應(yīng)急通信系統(tǒng)的發(fā)展具有十分重要的意義。本文的目標(biāo)是開發(fā)出一個界面友好、實用性強、便于功能拓展和維護、適合搶險救災(zāi)使用環(huán)境、滿足應(yīng)急指揮使用需求的應(yīng)急手持終端。 本文首先分析了應(yīng)急通信系統(tǒng)的需求及現(xiàn)有系統(tǒng)的不足，提出了既能滿足應(yīng)急通信需求又能解決現(xiàn)有系統(tǒng)不足的應(yīng)急寬帶無線通信系統(tǒng)網(wǎng)絡(luò)模型，并確定了基于該網(wǎng)絡(luò)模型的應(yīng)急手持終端的研究思路和方向。 然后，按照項目管理的要求，進行了應(yīng)急手持終端的需求分析，并通過業(yè)務(wù)種類整理和實際使用環(huán)境分析，整理出應(yīng)急手持終端的技術(shù)指標(biāo)，以嵌入式系統(tǒng)的理論為基礎(chǔ)，根據(jù)技術(shù)指標(biāo)進行了軟硬件方案設(shè)計，進而完成了硬件電路及系統(tǒng)引導(dǎo)程序的詳細(xì)設(shè)計。其間，對處理器及相關(guān)存儲器、顯示接口、USB接口、以太網(wǎng)接口、無線網(wǎng)絡(luò)、GPS模塊、電源管理等電路的硬件設(shè)計做了詳細(xì)闡述，針對各種外圍設(shè)備與接口的使用特點分別提出了相應(yīng)的節(jié)能措施，對處理器軟件的啟動過程、Nand Flash壞塊管理機制及引導(dǎo)程序的定制與移植做了詳細(xì)說明。 最后，，對系統(tǒng)進行了功能測試，通過利用處理器的節(jié)能模式、提高外圍器件集成度、降低器件工作電壓、分布式供電、優(yōu)化電源管理等方法的運用，有效地解決了高性能與低功耗、小體積的矛盾，開發(fā)出了一個用戶交互性能良好、功能實用、支持軟件升級、能滿足當(dāng)前需求的應(yīng)急手持終端。 在本文的研究中，在系統(tǒng)的方案設(shè)計、低功耗設(shè)計等方面做了較多工作，收到了比較好的效果。本文主要開發(fā)的部分包括應(yīng)急手持終端軟硬件方案、硬件詳細(xì)設(shè)計及處理器啟動引導(dǎo)程序的設(shè)計。
[Abstract]:With the frequent occurrence of earthquakes, tsunamis, terrorist attacks, infectious diseases and other natural disasters and large-scale public events around the world, the lives and property of countries and people have suffered great losses. In order to effectively organize disaster relief, an emergency broadband wireless communication system with rapid response and high efficiency is urgently needed. As an integral part of emergency broadband wireless communication system, emergency handheld terminal is of great significance to the development of emergency communication system. The goal of this paper is to develop an emergency handheld terminal with friendly interface, strong practicability, convenient function expansion and maintenance, suitable for emergency rescue and disaster relief environment and meeting the needs of emergency command. This paper first analyzes the demand of emergency communication system and the deficiency of existing system, and puts forward a network model of emergency broadband wireless communication system, which can not only meet the need of emergency communication but also solve the shortage of existing system. The research idea and direction of the emergency handheld terminal based on the network model are determined. Then, according to the requirements of project management, the requirement analysis of emergency handheld terminal is carried out, and the technical index of emergency handheld terminal is sorted out through the sort of service arrangement and practical use environment analysis, which is based on the theory of embedded system. The hardware and software are designed according to the technical specifications, and the hardware circuit and system boot program are designed in detail. In the meantime, the hardware design of processor and related memory, display interface and USB interface, Ethernet interface, wireless network GPS module, power management and so on are described in detail. According to the characteristics of various peripheral devices and interfaces, the corresponding energy saving measures are put forward, and the mechanism of bad block management and the customization and transplantation of boot program of processor software are explained in detail. Finally, the function of the system is tested. By using the energy saving mode of the processor, the integration of peripheral devices is improved, the working voltage of the device is reduced, the distributed power supply is distributed, the power management is optimized and so on. It effectively solves the contradiction between high performance and low power consumption and small volume, and develops an emergency handheld terminal with good user interaction performance, practical function, software upgrade, and can meet the current needs. In the research of this paper, more work has been done in the system scheme design, low power design and so on, and good results have been obtained. The main part of this paper includes the hardware and software scheme of emergency handheld terminal, the detailed design of hardware and the design of boot program of processor.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TN92;TP368.1

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