本文選題：射頻喚醒　切入點：低功耗　出處：《電子科技大學(xué)》2014年碩士論文

【摘要】：無線傳感器網(wǎng)絡(luò)是近年來發(fā)展非常迅速的一種以傳感器和無線通信方式實現(xiàn)信息獲取和處理的技術(shù)。其一個重要的特性就是極低的功耗,然而在實際應(yīng)用中,支持ZigBee節(jié)點所使用協(xié)議的射頻芯片無法從睡眠模式下自動喚醒,射頻芯片只能處于完全工作模式和周期性喚醒模式,雖然“偵聽、休眠”模式相對于完全工作模式功耗降低了很多,但毋庸置疑的是在這兩種工作模式下射頻模塊的功耗依然較高,無法滿足實際應(yīng)用中的需求。本文首先介紹了無線傳感器網(wǎng)絡(luò)的發(fā)展現(xiàn)狀,以及在功耗問題上現(xiàn)有的研究成果,然后以Cockcroft-Walton倍壓整流電路為基礎(chǔ),在考慮實際條件環(huán)境,提出并分析了在高頻和低功率輸入下考慮二極管參數(shù)、倍壓級數(shù)、負(fù)載阻抗等多項因素的電路分析模型,對該模型進(jìn)行了詳細(xì)的分析和簡化。其次,通過簡化模型,設(shè)計并制作了一種適用于無線傳感器網(wǎng)絡(luò)的低功耗射頻喚醒半無源化模塊,對該模塊進(jìn)行了詳細(xì)的調(diào)試和實際測試,包含阻抗匹配電路、功率放大電路的調(diào)試,模塊在喚醒距離和功耗上的多點測試,以及在電路性能上的參數(shù)優(yōu)化,實際測試結(jié)果表明,該模塊在空曠條件且僅消耗6.2uW能耗的情況下,其喚醒距離約為13米。最后,為了使設(shè)計的射頻喚醒模塊能夠和MAC層協(xié)議相融合,論文在已有的MAC層協(xié)議研究成果上,對無線令牌協(xié)議進(jìn)行了改進(jìn),改進(jìn)后的協(xié)議充分利用了射頻喚醒機制和無線令牌環(huán)網(wǎng)機制,將傳輸信道分為了數(shù)據(jù)信道和喚醒信道。實驗表明,改進(jìn)型的MAC層協(xié)議,在傳輸時延和功耗方面均優(yōu)于S-MAC協(xié)議,使得無線傳感器網(wǎng)絡(luò)的功耗進(jìn)一步降低。
[Abstract]:Wireless sensor networks (WSN) have been developed rapidly in recent years to achieve information acquisition and processing by means of sensors and wireless communication.One of its important features is very low power consumption. However, in practical applications, RF chips that support the protocols used by ZigBee nodes cannot automatically wake up from sleep mode, and RF chips can only be in full working mode and periodic wake-up mode.Although the power consumption of the "listening, sleeping" mode is much lower than that of the full working mode, there is no doubt that the power consumption of the RF module is still relatively high in these two modes of operation, and can not meet the needs of practical applications.This paper first introduces the development of wireless sensor networks and the existing research results in power consumption, then based on the Cockcroft-Walton voltage doubling rectifier circuit, considering the actual conditions,A circuit analysis model considering diode parameters, voltage doubling series and load impedance under high frequency and low power input is proposed and analyzed. The model is analyzed and simplified in detail.Secondly, by simplifying the model, a low-power RF wake-up semi-passive module for wireless sensor networks is designed and fabricated. The module is debugged and tested in detail, including impedance matching circuit.The debugging of the power amplifier circuit, the multipoint test of the module in wakeup distance and power consumption, and the parameter optimization in the circuit performance show that the module consumes only the 6.2uW energy consumption under the condition of open space.The arousal distance is about 13 meters.Finally, in order to integrate the designed RF wake-up module with the MAC protocol, this paper improves the wireless token protocol based on the existing research results of the MAC protocol.The improved protocol makes full use of the radio frequency wake-up mechanism and the wireless token ring network mechanism, and divides the transmission channel into data channel and wake-up channel.The experimental results show that the improved MAC protocol is superior to the S-MAC protocol in terms of transmission delay and power consumption, which further reduces the power consumption of wireless sensor networks.
【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】：2014
【分類號】：TN929.5;TP212.9

【共引文獻(xiàn)】

相關(guān)期刊論文 前3條

1 龔冰青;王緩緩;;低功耗射頻觸發(fā)喚醒電路設(shè)計[J];電子科技;2013年10期

2 肖文洋;閆斌;;射頻喚醒技術(shù)在WSNs低功耗中的應(yīng)用[J];傳感器與微系統(tǒng);2013年12期

3 陸游;禹素萍;姜華;吳波;;一種能量可計算的星型無線傳感器網(wǎng)絡(luò)協(xié)議[J];天津工業(yè)大學(xué)學(xué)報;2013年04期

相關(guān)博士學(xué)位論文 前1條

1 雷聲;基于聲表面波及微納技術(shù)的高性能濕敏傳感器研究[D];浙江大學(xué);2011年

相關(guān)碩士學(xué)位論文 前2條

1 常青;物聯(lián)網(wǎng)環(huán)境下的糧倉環(huán)境監(jiān)測系統(tǒng)設(shè)計[D];電子科技大學(xué);2012年

2 劉明;基于Zigbee的野外地溫監(jiān)測節(jié)點的設(shè)計[D];西安工業(yè)大學(xué);2014年

，

本文編號：1719606