本文關鍵詞：基于ARM的有源UHF電子標簽的應用設計　出處：《電子科技大學》2014年碩士論文　論文類型：學位論文

  更多相關文章： 超高頻RFID讀寫器 ARM9 UCOSII UHF天線 有源UHF電子標簽

【摘要】：RFID即射頻識別技術,是一種通過無線電對目標進行識別的技術,是物聯(lián)網(wǎng)發(fā)展的基礎,目前在國內(nèi)外發(fā)展迅速,已經(jīng)形成了眾多行業(yè)規(guī)范。其中無源電子標簽占據(jù)大部分市場份額,而有源電子標簽處于發(fā)展初期。有源電子標簽擁有無源電子標簽不具有的傳感器功能。通用超高頻讀寫器往往不具有有源電子標簽的擴展功能命令。為此本文提出了一種有源UHF電子標簽的應用系統(tǒng)設計,包括超高頻讀寫器、天線和有源電子標簽。首先讀寫器射頻前端使用分立元件搭建以減少成本。讀寫器基帶信號的處理使用ARM9通過軟件實現(xiàn),其中ARM9的PWM輸出用于控制射頻開關進行編碼,然后對標簽返回信號使用中斷捕捉并通過軟件狀態(tài)機解碼。為適應多任務的上層應用,需將讀寫程序移植到嵌入式操作系統(tǒng)UCOSII上,并使用VC++編寫讀寫軟件,可以通過串口控制讀寫器的讀寫。其次,由于天線的好壞直接影響讀寫器的性能,而市面上的桌面讀寫器使用的陶瓷天線成本較高,為此本文設計了一款小型UHF PCB天線,該天線采用對稱振子結構模型,通過彎折天線臂減小天線尺寸,使用巴倫將天線輸入阻抗匹配到50?,使用HFSS13對天線進行建模和仿真優(yōu)化,最后制作出天線實物。再者,本文使用有源電子標簽芯片SL900A,通過HFSS仿真出適合此芯片的PCB天線,進而設計出一款能夠記錄環(huán)境溫度的超高頻有源電子標簽。在上面設計的讀寫器編解碼的基礎上,實現(xiàn)該標簽的附加功能命令,用于進行無線溫度監(jiān)控。最后對上述設計進行測試。測試內(nèi)容包括讀寫器的射頻收發(fā)電路測試、讀寫軟件測試、天線測試和有源電子標簽測試,測試結果表明,系統(tǒng)能正常工作,滿足應用要求。
[Abstract]:Radio Frequency Identification (RFID) is a technology for target identification by radio. It is the basis of the development of Internet of things and is developing rapidly at home and abroad. Many industry norms have been formed, in which passive electronic tags account for most of the market share. But the active electronic tag is in the early stage of development. The active electronic tag has the sensor function which the passive electronic tag does not have. The universal UHF reader often does not have the expansion function command of the active electronic tag. An application system of active UHF tag is designed. It includes UHF reader, antenna and active electronic tag. First, the RF front-end of reader is constructed with discrete components to reduce the cost. The reader baseband signal is processed by ARM9 through software. The PWM output of ARM9 is used to control the RF switch to code, then the tag return signal is captured by interrupt and decoded by the software state machine. Need to transplant the read and write program to the embedded operating system UCOSII, and use VC to write read and write software, you can control the reading and writing of the reader through the serial port. Secondly. Because the antenna directly affects the performance of the reader, and the cost of ceramic antenna used in the desktop reader is high, a small UHF PCB antenna is designed in this paper. The antenna adopts a symmetrical dipole structure model, which reduces the antenna size by bending the antenna arm, and uses Barron to match the antenna input impedance to 50? HFSS13 is used to model and simulate the antenna, and finally the antenna object is made. Furthermore, the active tag chip SL900A is used in this paper. The PCB antenna suitable for this chip is simulated by HFSS, and a UHF active electronic tag which can record the ambient temperature is designed. On the basis of the codec of the reader designed above. The additional function command of the tag is used for wireless temperature monitoring. Finally, the above design is tested. The test includes RF transceiver circuit test, read and write software test. The antenna test and active tag test show that the system can work normally and meet the requirements of application.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN820;TP391.44

【參考文獻】

相關期刊論文 前3條

1 于志宏;張紅雨;;UHF RFID讀寫器編解碼模塊的FPGA實現(xiàn)[J];單片機與嵌入式系統(tǒng)應用;2012年10期

2 廖彬彬;趙知勁;張福洪;;EPCglobal C1 Gen2標準中CRC算法的實現(xiàn)[J];計算機工程;2008年24期

3 宋立眾;馬寧;吳群;;一種915MHz印刷偶極子標簽天線的分析與設計[J];微波學報;2008年06期

相關碩士學位論文 前1條

1 周飛;超高頻RFID讀寫器設計[D];電子科技大學;2008年

，

本文編號：1417078