红外线防盗报警设计

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红外线防盗报警器设计
摘  要：红外线防盗报警器主要是利用红外线来传递控制信号，实现对控制对象的远距离控制报警。根据它的基本原理我设计了一种基于红外线发射和接收的防盗报警器。该报警器主要由发射电路、按键电路、接收电路、编解码电路、电源电路五部分组成。其中，编码电路与发射电路构成一个有机整体，采用PT2262作为编码器，用来发射315MHz的高频载波，将编码后的地址码、数据码、同步码随同载波一起发射出去；而解码电路与接收电路同样构成一个有机整体，用来接收红外线发射电路发射出的信号，该信号经解码后变成所需的电信号，经放大后外接喇叭进行报警。解码电路采用PT2272作为编码器，工作频率315MHz，工作电压12V。该红外线防盗报警器主要应用于家用电器 、安全保卫、工业控制以及人们的日常生活等许多领域。
关键词：红外线 防盗器 报警器 编码器 解码器 

The design of infrared bug
Abstract：The infrared bug mainly makes use of the infrared ray to transmit controlling singles in order to realize the remote controlling alarm. According to the infrared bug’s principle, I design a bug based on the eradiating and receiving of the infrared ray.   Exteriorly by using eradiate circuit, key circuit, receive circuit, encode and decode circuit and power circuit to realize the bug control. Among these circuit units, encoder circuit and eradiate circuit come to an organic entity which use PT2262 as the encoder to radiate high frequency carrier wave (315MHz). After encoded, the address codes, data codes and in-phase code will be eradiated with the carrier wave. As same as the encode and eradiate circuit, the decode circuit and receive circuit compose an organic entity used to receive singles radiated by the infrared eradiate circuit. After decoded, the singles change to the needed bugle. PT2272 is the core of the decode circuit as the decoder whose working frequency is 315MHz. In addition, the system’s working voltage is 12V.
Keyword：infrared  annunciator  bug  encoder  decode

目  录

摘要
1引言  1
2系统概述  1
3方案比较  1
3.1整体设计方案比较  1
 3.2发射部分比较  3
4系统整体硬件设计方案  3
 4.1红外遥控的基本原理 3
 4.2系统工作原理概述 6
 4.3接收模块 13
 4.4遥控器与接收模块应用 15
 4.5红外线发射与接收器件 16
5测试方法及数据 19
 5.1接收器件PT2272测试参数 19
 5.2红外线报警器的测试结果分析 19
6总结 21
参考文献 22
致谢 23
附录1发射接收电路PCB 24
附录2 8位/12位地址发射PCB 25

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