發(fā)布時間：2018-03-22 01:32

  本文選題：無線圖像傳感器網(wǎng)絡(luò)　切入點：圖像傳輸　出處：《北京交通大學》2014年碩士論文　論文類型：學位論文

【摘要】：摘要：無線圖像傳感器網(wǎng)絡(luò)通過自組網(wǎng)方式進行圖像數(shù)據(jù)采集和無線傳輸。通過集成化的微型圖像傳感器對環(huán)境信息進行感知和采集,把采集的圖像信息通過無線方式進行發(fā)送,并以自組多跳的網(wǎng)絡(luò)方式傳送到匯聚節(jié)點,實現(xiàn)用戶對環(huán)境的監(jiān)測與控制。無線圖像傳感器網(wǎng)絡(luò)被廣泛應(yīng)用于環(huán)境監(jiān)測、智能家居、醫(yī)療健康等領(lǐng)域。 論文主要針對無線圖像傳感器網(wǎng)絡(luò)的數(shù)據(jù)采集與數(shù)據(jù)可靠性無線傳輸兩個方面進行研究。首先考慮到圖像傳感器節(jié)點的功耗、處理能力、體積等因素,提出了具有休眠機制的圖像傳感器節(jié)點的系統(tǒng)方案。通過分析圖像傳感器節(jié)點各個模塊(圖像傳感器模塊、嵌入式微控制器模塊、無線通信模塊、能量供應(yīng)模塊)的指令系統(tǒng)和工作機制,實現(xiàn)對圖像采集的指令控制以及對圖像采集過程的系統(tǒng)控制,最后將采集的圖像數(shù)據(jù)通過無線方式傳輸至匯聚節(jié)點。 通過對比其他短距離無線通信技術(shù),論文選取Zigbee協(xié)議作為無線通信方式。由于無線信道的復(fù)雜性,需要提出有效措施保護圖像數(shù)據(jù)在無線信道中可靠傳輸。通過對現(xiàn)有無線通信可靠機制以及真實系統(tǒng)環(huán)境的分析,針對Zigbee網(wǎng)絡(luò)層重傳機制數(shù)據(jù)傳輸?shù)拇嗳跣?論文提出一種基于Zigbee應(yīng)用層的高效型重傳與返回確認機制。論文首先分析與測試了Zigbee網(wǎng)絡(luò)層重傳機制的數(shù)據(jù)傳輸,由于Zigbee網(wǎng)絡(luò)層數(shù)據(jù)重傳機制過多的時間消耗導致數(shù)據(jù)傳輸混疊和數(shù)據(jù)重復(fù)接收問題,進而提出了Zigbee應(yīng)用層數(shù)據(jù)傳輸設(shè)計。設(shè)計中針對匯聚節(jié)點接收圖像數(shù)據(jù)情況,提出三種不同的響應(yīng)機制(ACK、數(shù)據(jù)重復(fù)接收、Busy)提高數(shù)據(jù)的處理能力,并且根據(jù)匯聚節(jié)點不同的響應(yīng)機制,圖像傳感器節(jié)點做出相應(yīng)的數(shù)據(jù)發(fā)送機制,從而提高數(shù)據(jù)無線傳輸?shù)目煽啃�。本文針對Zigbee網(wǎng)絡(luò)層數(shù)據(jù)傳輸和Zigbee應(yīng)用層數(shù)據(jù)傳輸兩種方式,進行了不同最大重傳次數(shù)的數(shù)據(jù)傳輸與時間消耗、數(shù)據(jù)丟包率關(guān)系的測試。實驗結(jié)果表明,相對于Zigbee網(wǎng)絡(luò)層數(shù)據(jù)重傳機制,Zigbee應(yīng)用層設(shè)計的數(shù)據(jù)傳輸機制顯著縮短了重傳機制消耗的時間,并且.提高了數(shù)據(jù)傳輸?shù)目煽啃浴?br/>[Abstract]:Absrtact: wireless image sensor network is used for image data acquisition and wireless transmission through ad hoc network, and environmental information is sensed and collected by integrated micro image sensor. The collected image information is transmitted by wireless mode, and transmitted to the convergent node by self-organizing multi-hop network, which realizes the user's monitoring and control of the environment. Wireless image sensor network is widely used in environmental monitoring, smart home, wireless image sensor network (WSN) is widely used in environmental monitoring and smart home. Health care and other fields. This paper mainly focuses on the data acquisition and data reliability wireless transmission of wireless image sensor network. Firstly, considering the power consumption, processing ability, volume of image sensor node, etc. The system scheme of image sensor node with dormancy mechanism is put forward, and each module of image sensor node (image sensor module, embedded microcontroller module, wireless communication module) is analyzed. The command system and working mechanism of the energy supply module, the command control of the image acquisition and the system control of the image acquisition process are realized. Finally, the collected image data is transmitted to the convergence node through wireless mode. By comparing other short-range wireless communication technologies, this paper selects Zigbee protocol as the wireless communication mode. It is necessary to propose effective measures to protect the reliable transmission of image data in wireless channels. Through the analysis of the existing reliable wireless communication mechanism and the real system environment, the vulnerability of the Zigbee network layer retransmission mechanism data transmission is pointed out. In this paper, an efficient retransmission and return verification mechanism based on Zigbee application layer is proposed. Firstly, the data transmission of Zigbee network layer retransmission mechanism is analyzed and tested. Because too much time consumption of Zigbee network layer data retransmission mechanism leads to the problem of data transmission aliasing and data receiving repeatedly, the design of Zigbee application layer data transmission is put forward, and the image data is received by the convergent node in the design. In this paper, three different response mechanisms (ACKs) are proposed to improve the data processing capability. According to the different response mechanisms of the convergent nodes, the image sensor nodes make the corresponding data transmission mechanism. In order to improve the reliability of wireless data transmission, this paper deals with the data transmission and time consumption of different maximum retransmission times for Zigbee network layer data transmission and Zigbee application layer data transmission. The experimental results show that compared with the data retransmission mechanism of Zigbee network layer, the data transmission mechanism designed by Zigbee application layer significantly shortens the time consumed by the retransmission mechanism and improves the reliability of data transmission.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP274.2;TN929.5;TP212.9

【參考文獻】

相關(guān)期刊論文 前10條

1 王擘;汪文勇;楊挺;胡蜀徽;;基于6LoWPAN的無線農(nóng)田信息監(jiān)測系統(tǒng)[J];傳感器與微系統(tǒng);2011年04期

2 劉超偉;趙俊淋;易衛(wèi)東;;基于nRF24L01的無線圖像傳感器節(jié)點設(shè)計實現(xiàn)[J];電子測量技術(shù);2008年06期

3 孫巖;馬華東;;無線多媒體傳感器網(wǎng)絡(luò)QoS保障問題[J];電子學報;2008年07期

4 王東;張金榮;魏延;曹長修;唐政;;利用ZigBee技術(shù)構(gòu)建無線傳感器網(wǎng)絡(luò)[J];重慶大學學報(自然科學版);2006年08期

5 吳婉陽;田云杰;曹聰;沙超;;基于ZigBee網(wǎng)絡(luò)的多跳圖像傳輸系統(tǒng)的設(shè)計[J];電腦知識與技術(shù);2012年22期

6 袁志強;;基于ZigBee技術(shù)井下瓦斯無線監(jiān)測系統(tǒng)的設(shè)計[J];工業(yè)安全與環(huán)保;2013年06期

7 張足生;袁華強;于峰崎;;無線傳感器網(wǎng)絡(luò)動態(tài)重傳算法[J];傳感技術(shù)學報;2013年07期

8 董慶賀;何倩;;基于ZigBee的無線溫度監(jiān)測系統(tǒng)設(shè)計[J];計算機應(yīng)用;2011年S2期

9 魯琴;胡冰;羅武勝;;基于OMAP的無線多媒體傳感網(wǎng)圖像節(jié)點設(shè)計[J];計算機測量與控制;2009年09期

10 劉龍申;沈明霞;孫玉文;陸明洲;熊迎軍;;基于FPGA的農(nóng)田圖像采集與3G無線傳輸系統(tǒng)設(shè)計[J];農(nóng)業(yè)機械學報;2011年12期

，

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