本文選題：CORTEX-A8 + 物聯(lián)網(wǎng)��； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：隨著社會(huì)經(jīng)濟(jì)的高速發(fā)展和科技的全面進(jìn)步,人們不斷追求著高品質(zhì)的生活。飛速發(fā)展的計(jì)算機(jī)技術(shù)和移動(dòng)互聯(lián)網(wǎng)技術(shù),使我們的生活變得愈加智能,但人們已經(jīng)不滿足于人與人的通信。人和物的“對(duì)話”,物和物的“交流”,將成為今后網(wǎng)絡(luò)技術(shù)革新的發(fā)展趨勢(shì)。本文基于成熟的嵌入式開發(fā)技術(shù)。結(jié)合市場(chǎng)占有率極高的Android系統(tǒng),選用搭載了CORTEX-A8高性能處理器的S5PC100開發(fā)板為主控平臺(tái),結(jié)合高效的視頻圖像編、解碼算法與軟件控制技術(shù),開發(fā)出了云臺(tái)攝像頭模塊、LCD顯示模塊、ROBOT移動(dòng)控制模塊、M0溫濕度監(jiān)控模塊、以及Android客戶端模塊。設(shè)計(jì)出了一款典型物聯(lián)網(wǎng)應(yīng)用方向的倉庫智能監(jiān)控系統(tǒng)。該系統(tǒng)主要實(shí)現(xiàn)了攝像頭對(duì)實(shí)時(shí)圖像的采集、視頻的格式轉(zhuǎn)換、壓縮、存儲(chǔ)傳輸,實(shí)時(shí)溫濕度采集,以及客戶端對(duì)主控平臺(tái)自由移動(dòng)控制。以WIFI為服務(wù)器與客戶端之間通信的媒介,實(shí)現(xiàn)客戶端對(duì)倉庫實(shí)時(shí)信息接收和處理。主控平臺(tái)上,將I/O多路復(fù)用技術(shù)運(yùn)用到服務(wù)器的設(shè)計(jì)中,實(shí)現(xiàn)了服務(wù)器能同時(shí)處理多個(gè)客戶端的連接請(qǐng)求,同時(shí)為了提高系統(tǒng)各模塊的并發(fā)性,采用了多線程技術(shù),并利用Linux內(nèi)核中的互斥鎖與消息隊(duì)列對(duì)系統(tǒng)中共享的資源實(shí)現(xiàn)同步互斥訪問,以解決線程并發(fā)執(zhí)行帶來的競(jìng)態(tài)問題;利用V4L2提供的視頻采集接口完成了實(shí)時(shí)視頻的采集,并對(duì)采樣后的視頻數(shù)據(jù)基于H.264標(biāo)準(zhǔn)進(jìn)行壓縮與存儲(chǔ),從而實(shí)現(xiàn)了攝像頭視頻采集模塊;利用幀緩存技術(shù)實(shí)現(xiàn)了LCD顯示模塊;基于標(biāo)準(zhǔn)串口編程,實(shí)現(xiàn)了Robot移動(dòng)控制模塊與M0溫濕度采集模塊。最后,基于分層分工的設(shè)計(jì)思想,同時(shí)也使代碼層次更清晰,更易維護(hù),設(shè)計(jì)了主程序模塊,對(duì)各獨(dú)立功能模塊進(jìn)行管理�？蛻舳�,以WiFi為媒介,基于Android系統(tǒng)下Java實(shí)現(xiàn)的套接字接口,進(jìn)行網(wǎng)絡(luò)編程,建立與服務(wù)器在局域網(wǎng)內(nèi)的無線通信,實(shí)現(xiàn)了實(shí)時(shí)視頻數(shù)據(jù)的傳輸。并利用Android中Handler技術(shù)對(duì)客戶端接收到的視頻流進(jìn)行顯示,同時(shí)也實(shí)現(xiàn)了客戶端對(duì)Robot移動(dòng)平臺(tái)的控制及M0溫濕度采集模塊所采集信息的獲取與顯示。最后,對(duì)各硬件設(shè)備進(jìn)行組裝,對(duì)各獨(dú)立設(shè)計(jì)的應(yīng)用模塊進(jìn)行編譯下載。對(duì)設(shè)計(jì)初制定的各模塊功能進(jìn)行調(diào)試,使設(shè)計(jì)基本實(shí)現(xiàn)制定的功能,并提出了一些完善和改進(jìn)的地方。
[Abstract]:With the rapid development of social economy and the overall progress of science and technology, people continue to pursue high-quality life. With the rapid development of computer technology and mobile Internet technology, our life has become more intelligent, but people are no longer satisfied with the communication between people. The dialogue between people and things, the exchange of things and things will become the developing trend of network technology innovation in the future. This paper is based on the mature embedded development technology. Combined with the Android system with high market share, the S5PC100 development board with CorTEX-A8 high-performance processor is selected as the main control platform, and the efficient video image coding, decoding algorithm and software control technology are combined. The M0 temperature and humidity monitoring module and the Android client module are developed. An intelligent warehouse monitoring system with typical application direction of the Internet of things is designed. The system mainly realizes the acquisition of real-time images by the camera, the format conversion, compression, storage and transmission of video, real-time temperature and humidity acquisition, and the free movement control of the main control platform by the client. With WiFi as the medium of communication between the server and the client, the client can receive and process the real time information from the warehouse. On the main control platform, I / O multiplexing technology is applied to the design of the server, which realizes that the server can handle multiple client connection requests at the same time. In order to improve the concurrency of each module of the system, the multithreading technology is adopted. The mutual exclusion lock and message queue in Linux kernel are used to realize synchronous mutex access to the shared resources in the system to solve the race problem caused by concurrent thread execution, and the video capture interface provided by V4L2 is used to complete the real-time video acquisition. The video data after sampling is compressed and stored based on H.264 standard, so that the video capture module of camera is realized, the LCD display module is realized by frame buffer technology, and the programming based on standard serial port is carried out. Robot mobile control module and M 0 temperature and humidity acquisition module are implemented. Finally, based on the hierarchical division of labor design idea, but also make the code level clearer, easier to maintain, designed the main program module, to manage the independent functional modules. Based on the socket interface implemented in Android system, the client, using WiFi as the medium, carries out network programming, establishes the wireless communication with the server in the LAN, and realizes the transmission of real-time video data. The video stream received by client is displayed by Handler technology in Android. At the same time, the control of mobile platform by client and the acquisition and display of information collected by M0 temperature and humidity acquisition module are realized. Finally, each hardware device is assembled and the application modules designed independently are compiled and downloaded. The function of each module is debugged at the beginning of the design, so that the function of the design can be basically realized, and some improvements are put forward.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP391.44;TN929.5

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