无线射频识别系统发射接收硬件电路的设计

文档编号:JD139 包括 开题报告,大图,字数:12821,页数:35

摘    要
随着科技的发展，射频识别技术也应用得越发广泛。本设计是以LPC932单片机为微处理器，单片nRF905收发器为射频发射、接收芯片的无线射频识别系统发射接收电路。整个系统中包括射频发射部分和射频接收部分。发射部分可以实现发送人员信息的功能，接收部分则在10米范围内接收发射卡所发送出的内容，而这些接收到的内容则通过液晶显示器显示出来，并通过由语音芯片为核心所设计的语音电路进行语音播报。另外，通过串行通信电路传送到PC机上。在整个系统的设计中不免会出现各种干扰，针对这一点，进行系统硬件的抗干扰措施。由于系统有着体积小，无线，智能化的特点，在各种领域广泛地使用，在未来也将具有广阔的发展前景。

关键词：射频识别技术；单片机；抗干扰

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

目    录
1 绪论 ......................................................................1
1.1 无线射频识别技术（RFID）基本概念 ........................................1
1.2 射频识别技术的发展 ......................................................1
1.3 射频识别技术的应用领域.................................................. 2
1.4 本文研究的主要内容 ......................................................3
2 系统硬件设计 ..............................................................4
2.1 系统框图................................................................ 4
2.2 LPC932单片机介绍........................................................ 5
2.3 单片机最小系统.......................................................... 5
2.4 nRF905的介绍 ............................................................7
2.5 基于nRF905的无线射频发射电路及接收电路.................................. 8
2.6 电源电路............................................................... 14
2.9 串行通信电路 ...........................................................19
3 系统抗干扰措施 ...........................................................22
3.1干扰的基本要素 ..........................................................22
3.2 干扰的分类 .............................................................22
3.3 单片机抗干扰措施 .......................................................22
3.4 过程通道抗干扰措施..................................................... 23
4 应用前景................................................................. 25
5 结论 .....................................................................27
致    谢 ...................................................................28
参考文献................................................................... 29

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