目录
目录.......................................................................................................................................................................I
摘要.......................................................................................................................................................................I
1 小区防盗报警系统综述 .............................................................................................................................1
1.1 课题背景 ................................................................................................................................................1
1.2 防盗系统发展历史及分类 ....................................................................................................................1
1.2.1 防盗报警系统的发展历程 ..........................................................................................................1
1.2.2 防盗报警的分类 ..........................................................................................................................2
1.2.3 国内外研究情况 ..........................................................................................................................2
1.2.4 目前存在的问题 ..........................................................................................................................3
1.2.5 防盗报警系统应用情况及发展趋势 .........................................................................................3
2 总体设计方案 ...............................................................................................................................................5
2.1 设计思路 ................................................................................................................................................5
2.2 系统方案论证与拟定 ............................................................................................................................5
2.3 系统组成 ................................................................................................................................................5
3 单元硬件电路 ...............................................................................................................................................7
3.1 控制器—单片机 ....................................................................................................................................7
3.1.1 单片机的历史 ..............................................................................................................................7
3.1.2 单片机的应用领域 ......................................................................................................................7
3.1.3 单片机 AT89C52 .........................................................................................................................8
3.2 无线接收电路设计 ..............................................................................................................................11
3.2.1 PT2272 芯片介绍.......................................................................................................................11
3.2.2 无线接收电路 ............................................................................................................................12
3.3 系统设置及显示电路 ..........................................................................................................................13
3.3.1 LED 显示器及其工作原理........................................................................................................13
3.3.2 LED 数码管显示与单片机 I/O 接口设计 ................................................................................14
3.3.3 系统设置电路 ............................................................................................................................15
3.4 报警电路设计 ......................................................................................................................................16
3.4.1 音频功率放大器 LM386 ...........................................................................................................16
3.4.2 监控指示电路 ............................................................................................................................17
3.5 无线发射电路 ......................................................................................................................................17
3.5.1 数据采集与监控 ........................................................................................................................17
3.5.2 无线编码电路 ............................................................................................................................21
3.6 系统电源 ..............................................................................................................................................24
3.6.1 主机电源 ....................................................................................................................................24
3.6.2 分机电源 ....................................................................................................................................25
3.7 电平转换器件 MAX232 ......................................................................................................................26
4 电路原理图的设计 ....................................................................................................................................28
4.1 Protel 99SE 简介 ...................................................................................................................................28
4.2 原理图设计 ..........................................................................................................................................28