無線射頻識別系統發射接收硬件電路的設計

電子機電論文編號:JD139 包括 開題報告,大圖,字數:12821,頁數:35

目    錄
1 緒論 ......................................................................1
1.1 無線射頻識別技術（RFID）基本概念 ........................................1
1.2 射頻識別技術的發展 ......................................................1
1.3 射頻識別技術的應用領域.................................................. 2
1.4 本文研究的主要內容 ......................................................3
2 系統硬件設計 ..............................................................4
2.1 系統框圖................................................................ 4
2.2 LPC932單片機介紹........................................................ 5
2.3 單片機最小系統.......................................................... 5
2.4 nRF905的介紹 ............................................................7
2.5 基于nRF905的無線射頻發射電路及接收電路.................................. 8
2.6 電源電路............................................................... 14
2.9 串行通信電路 ...........................................................19
3 系統抗干擾措施 ...........................................................22
3.1干擾的基本要素 ..........................................................22
3.2 干擾的分類 .............................................................22
3.3 單片機抗干擾措施 .......................................................22
3.4 過程通道抗干擾措施..................................................... 23
4 應用前景................................................................. 25
5 結論 .....................................................................27
致    謝 ...................................................................28
參考文獻................................................................... 29

摘    要
隨著科技的發展，射頻識別技術也應用得越發廣泛。本設計是以LPC932單片機為微處理器，單片nRF905收發器為射頻發射、接收芯片的無線射頻識別系統發射接收電路。整個系統中包括射頻發射部分和射頻接收部分。發射部分可以實現發送人員信息的功能，接收部分則在10米范圍內接收發射卡所發送出的內容，而這些接收到的內容則通過液晶顯示器顯示出來，并通過由語音芯片為核心所設計的語音電路進行語音播報。另外，通過串行通信電路傳送到PC機上。在整個系統的設計中不免會出現各種干擾，針對這一點，進行系統硬件的抗干擾措施。由于系統有著體積小，無線，智能化的特點，在各種領域廣泛地使用，在未來也將具有廣闊的發展前景。

關鍵詞：射頻識別技術；單片機；抗干擾

Abstract
With the development of science and technology, Radio Frequency Identification is used in many field. The title of the design in which LPC932 single-chip microcontroller is the microcontroller, and nRF905 is single-chip radio transceiver of the whole system is radio frequency indentification system sending and receiving circuit. There are two parts including the whole system: radio frequency sending circuit and radio frequency receiving circuit. In the sending part, the circuit could realized the function of sending peoples’ informations, and the content shoud be received in the range of 10 meters by the receiving part, displaying by LCD and speaking by audio circuit. Moreover, to transmit the receiving content to PC by serial communication circuit is one of function of the receiving terminal. Designing a electronic system, there are all kinds of interferences, thus, to carry out anti-interference measures to the system hardware is very important. Because of the system has the features of minute extension, wireless and intelligentize, which is used every field, and will have a nice development in the future.

Key Words：radio frequency identification；single-chip microcontroller；anti-interference