摘要
本文设计并实现了一种基于C8051F310单片机与nRF905无线收发模块的无线视频监控系统。系统通过摄像头采集视频信号，利用射频调制技术将信号转换为射频信号进行无线传输，接收端通过解调技术将射频信号还原为视频信号并显示，实现了对监控区域的实时监控。设计过程中，对比了两种方案：方案一采用A/D和D/A转换实现数字无线视频监控，虽性能优越但成本高昂、电路复杂；方案二采用数字与模拟结合的方式，利用射频无线发射与接收模块，结合单片机控制，实现了成本低廉、易于实现的无线视频监控系统。最终选定方案二，并详细阐述了系统组成、工作原理及实现过程。该系统不仅可用于家庭安防，还可广泛应用于商业、金融、教育等领域，具有较高的实用价值和市场前景。
关键词：无线视频监控系统；C8051F310单片机；nRF905无线收发模块；射频调制；实时监控
Abstract
This paper designs and implements a wireless video surveillance system based on the C8051F310 microcontroller and nRF905 wireless transceiver module. The system captures video signals through a camera, converts them into RF signals using RF modulation technology for wireless transmission, and restores the RF signals to video signals for display at the receiving end through demodulation technology, achieving real-time monitoring of the surveillance area. During the design process, two schemes were compared: Scheme 1, which employs A/D and D/A conversion for digital wireless video surveillance, offers superior performance but is costly and complex; Scheme 2, which combines digital and analog technologies using RF wireless transmission and reception modules, combined with microcontroller control, realizes a low-cost, easy-to-implement wireless video surveillance system. Scheme 2 was ultimately selected, and the system composition, working principle, and implementation process were elaborated in detail. This system is not only applicable to home security but also widely usable in commercial, financial, educational, and other fields, possessing high practical value and market prospects.
Keywords：Wireless Video Surveillance System; C8051F310 Microcontroller; nRF905 Wireless Transceiver Module; RF Modulation; Real-time Monitoring
目 录
1 引言
2 方案论证
2.1 方案1——采用A/D和D/A转换的数字无线视频监控系统
2.2 方案2——数字和模拟结合的无线视频监控系统
3 系统概述
4 单元电路设计
4.1 射频发射电路
4.2 射频接收
4.3 数字无线发射电路
4.3.1 C8051F310单片机介绍
4.3.2 nRF905芯片介绍
4.3.3 数字无线发射硬件电路
4.3.4 液晶显示电路
4.4 数字无线接收电路
4.5 电源电路
4.5.1 +5V电源电压设计
4.5.2 +3.3V电源电压设计
4.5.3 蓄电池
5 软件设计
5.1 数字无线发射电路程序设计
5.1.1 发射电路程序
5.1.2 液晶显示电路程序
5.2 数字无线接收电路程序设计
6 测试结果
结 论
参考文献
附录A 无线发射电路
附录B 无线接收电路
附录1 发射程序
附录2 液晶程序
附录3 接收程序
致 谢
