本文關(guān)鍵詞： 無(wú)線傳輸 嵌入式操作系統(tǒng) ARM9 Linux　出處：《山東大學(xué)》2013年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：隨著通訊技術(shù)和信息技術(shù)的發(fā)展,人們對(duì)通信設(shè)備的要求越來(lái)越高。人們?cè)絹?lái)越多的使用體積小巧、攜帶方便、功能強(qiáng)大的通信設(shè)備,無(wú)線傳輸方式與有線傳輸相比有著諸多優(yōu)點(diǎn)：無(wú)需架設(shè)電線,且覆蓋范圍廣,不受地理環(huán)境限制；語(yǔ)音信號(hào)的質(zhì)量很高,誤碼率很低；在出現(xiàn)故障時(shí)能快速找出原因,恢復(fù)正常運(yùn)行；安全保密性能好。 首先,本文介紹了無(wú)線語(yǔ)音技術(shù)的發(fā)展現(xiàn)況,然后分別介紹了國(guó)內(nèi)外的發(fā)展?fàn)顩r,以及本課題的意義和發(fā)展前景。其次,本文闡述了無(wú)線傳輸技術(shù)的發(fā)展歷程；簡(jiǎn)單介紹了語(yǔ)音壓縮編碼的發(fā)展歷史、研究現(xiàn)狀和常用的壓縮編碼算法,并分析了語(yǔ)音編碼算法的一般原理、分類(lèi)及其不同的實(shí)現(xiàn)方法。本文給出了一種無(wú)線語(yǔ)音傳輸系統(tǒng)的設(shè)計(jì)思路及實(shí)現(xiàn)方案、描述了項(xiàng)目背景和應(yīng)用價(jià)值,同時(shí)根據(jù)項(xiàng)目的需求選擇出使用的芯片：在種類(lèi)眾多的處理器中選出ARM9系列超低功耗處理器；ARM9具有高度可編程性、高性能、低功耗、可以選擇性的外圍器件搭配、語(yǔ)音芯片使用uda1380tt-MD立體聲音頻編碼解碼器；以及專(zhuān)為在433MHz ISM(工業(yè)、科研和醫(yī)療)頻段工作而設(shè)計(jì)的KH-WKTKIE-465PV大功率收發(fā)芯片。根據(jù)這些芯片資料繪制出原理圖與PCB圖。 最后,描述了本文的軟件平臺(tái)嵌入式Linux操作系統(tǒng),Linux是一種自由和開(kāi)放源碼的類(lèi)Unix操作系統(tǒng),存在著許多不同的Linux版本,但它們都使用了Linux內(nèi)核。Linux可以在各種計(jì)算機(jī)硬件設(shè)備中被安裝,比如常見(jiàn)的手機(jī)、平板電腦、路由器、視頻游戲控制臺(tái)、或者臺(tái)式機(jī)、大型機(jī)以及超級(jí)計(jì)算機(jī)等。Linux是領(lǐng)先的一個(gè)操作系統(tǒng),在世界上,運(yùn)算速度最快的10臺(tái)超級(jí)計(jì)算機(jī)內(nèi)部,使用的都是Linux操作系統(tǒng)。 針對(duì)以上的需求分析,展現(xiàn)出無(wú)線語(yǔ)音播報(bào)的市場(chǎng)潛力。本論文主要完成了以下幾方面工作： 1、無(wú)線語(yǔ)音播報(bào)的硬件設(shè)計(jì)。包括硬件平臺(tái)的總體規(guī)劃、硬件的選型與搭配、硬件實(shí)施方案。 本系統(tǒng)硬件主要有兩大部分組成,一部分是CPU核心模塊--信息處理部分,另一部分是無(wú)線發(fā)射模塊-信號(hào)發(fā)射部分。 硬件平臺(tái)采用以AT91RM9200為核心的處理器,外圍設(shè)備通過(guò)擴(kuò)展板與處理器連接,設(shè)備與處理器之間的數(shù)據(jù)傳遞通過(guò)串口交換,CPU進(jìn)行任務(wù)調(diào)度。 信息處理部分用于接收上位機(jī)的信息,并將接收的信息進(jìn)行分類(lèi)和處理,把接收到的需要播放的信息分析出來(lái),找到對(duì)應(yīng)的語(yǔ)音文件進(jìn)行合成,最后將合成的語(yǔ)音文件通過(guò)聲卡播放出來(lái)。 信號(hào)發(fā)射部分將上一部分通過(guò)聲卡播放的聲音通過(guò)無(wú)線模塊以無(wú)線廣播的模式發(fā)射出去,執(zhí)法人員通過(guò)對(duì)講機(jī)接收語(yǔ)音信息。 2、無(wú)線語(yǔ)音播報(bào)的軟件設(shè)計(jì)。包括Linux系統(tǒng)下的應(yīng)用程序開(kāi)發(fā)、硬件驅(qū)動(dòng)開(kāi)發(fā)。 本系統(tǒng)運(yùn)行的軟件平臺(tái)為L(zhǎng)INUX操作系統(tǒng),完成了在Linux下基于C語(yǔ)言的應(yīng)用程序開(kāi)發(fā)；另外牽扯到控制的許多硬件都需要底層驅(qū)動(dòng),比如串口、GPIO、音頻等等,在系統(tǒng)的開(kāi)發(fā)過(guò)程中完成了以上底層驅(qū)動(dòng)的開(kāi)發(fā)。 3、通過(guò)實(shí)地測(cè)試,諸如青島膠州灣大橋超載超限檢測(cè)站、國(guó)道G104瓷窯超載超限檢測(cè)站、廣州丫髻沙大橋超載超限檢測(cè)站等治超站的現(xiàn)場(chǎng)使用,也驗(yàn)證了該產(chǎn)品的可行性。 最后,對(duì)系統(tǒng)的未來(lái)發(fā)展進(jìn)行了展望。
[Abstract]:With the development of communication technology and information technology , the demand of communication equipment is getting higher and higher . Firstly , this paper introduces the status of the development of wireless voice technology , then introduces the development history of wireless transmission technology , the significance and development prospect of wireless transmission technology . Secondly , this paper describes the development history of the wireless transmission technology , the research situation and the common compression coding algorithm , and analyses the general principle , classification and implementation methods of the speech coding algorithm . Finally , we describe the embedded Linux operating system of the software platform , Linux is a kind of free and open source class Unix operating system , there are many different versions of Linux , but they all use the Linux kernel . Linux can be installed in various computer hardware devices , such as common mobile phones , tablets , routers , video game consoles , or desktops , mainframe computers , supercomputers , etc . Linux is the leading operating system , in the world , the fastest operating systems in the world are Linux operating systems . Aiming at the above demand analysis , this paper presents the market potential of wireless voice broadcasting . This paper mainly accomplishes the following aspects : 1 . Hardware design of wireless voice broadcasting . It includes the master plan of hardware platform , the selection and matching of hardware and implementation of hardware . The hardware of the system mainly consists of two parts , part of which is the CPU core module - information processing part , and the other part is the wireless transmission module - signal transmitting part . The hardware platform adopts AT91RM9200 as the core processor , the peripheral equipment is connected with the processor through the expansion board , and the data between the equipment and the processor is exchanged through the serial port , and the CPU performs task scheduling . the information processing part is used for receiving the information of the upper computer and classifying and processing the received information , analyzing the received information needed to be played , finding the corresponding voice file for synthesizing , and finally playing the synthesized speech file through the sound card . and the signal transmitting part transmits an upper part of the sound through the sound card to be transmitted through the wireless module in a wireless broadcast mode , and the law enforcement personnel receives the voice information through the intercom . 2 . Software design of wireless voice broadcasting , including application development and hardware drive development under Linux system . The software platform running on the system is the Linux operating system , and the development of the application program based on C language under Linux is completed , and many hardware involved in the control needs to be driven by the bottom layer , such as serial port , GPIO , audio and so on , and the development of the above bottom layer drive is completed during the development of the system . 3 . The feasibility of the product is also verified by field testing , such as the overload detection station of Qingdao Jiazhou Bay Bridge , the overload detection station of G104 porcelain kiln of Gudao , the overload detection station of Guangzhou Lajishan Bridge , etc . , and the feasibility of the product . Finally , the future development of the system is forecasted .

【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TN912.3;TP368.1

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本文編號(hào)：1493553