摘 要 城市供水中的水厂原水由地表水和地下水组成，地下水水源井地处城郊，分布较广，研究基于无线技术的视频信息采集与监控系统，对水源井现有数据监测装备实现升级，具有重要的实际应用价值。 根据企业对水源井视频监控的设计需求，提出了基于FPGA的无线视频监控系统设计方案，设计了基于3G无线网络的水源井视频监控系统前端各个模块，并编写接收端测试程序完成了水源井视频监控系统的测试。 水源井视频监控系统前端采用PAL制式摄像头通过CVBS接口采集视频数据，在DE2 开发板的主芯片EP2C35中设计并实现视频解码模块，通过软硬件结合的方法设计并优化了H.264压缩模块，在UC/OSⅡ操作系统上移植LWIP协议，设计数据接收和发送任务调度方法，对数据进行无线传输。开发中通过在SOPC Builder中建立NiosⅡ的SOPC平台，使用UC/OSⅡ操作系统进行任务调度，并完成无线传输协议封装。利用VHDL硬件描述语言完成视频的采集和模数转换。 采用C++编写NiosⅡ软件部分完成压缩视频协议封装和Socket通信等功能。系统预留水源井信息的数据接口，可将水源井参数数据加入封装模块，随视频一起传输，完成水源井数据和视频监控业务的要求。测试结果表明，本系统能够满足视频信息的采集与传输需求，实现了现有水源井监控系统的优化。

ABSTRACT The raw water of water plant of city water supply is composed of surface water and underground water. The water supply well of underground water locates in suburb and distributes abroad. The research on video information collecting and monitoring based on FPGA has important practical applications. Based on the design requirements of water plant, this paper presents an overall design scheme of wireless video monitoring system based on FPGA, and designs each module of front end of the 3G wireless video monitoring system based on FPGA. Receiver-side test program is written. It is used to finishes the test work. The front end of this system captures video data by PAL video camera through CVBS interface. This system uses EP2C35 main chip of DE2 development board to design and implement video decode module. By the way of software and hardware combination, it designs and optimizes H.264 compression module. The system transplants the LWIP on UC/OSⅡ and designs data receive and transmission scheduling method of wireless data transmission. In the development part, SOPC platform of NiosⅡis built on SOPC Builder. This system uses UC/OSⅡ operating system to implement task scheduling and capsulate wireless transport protocol. The video capture and A/D conversion are accomplished by Verilog HDL. This paper also designs a NiosⅡ test module. It accomplished the Socket communication to the sending side and other functions by C++.The system reserves water supply well data interface. It can be used to add water supply well parameters to the capsulation module, and meet the need of the demand the parameters transmit with video together. Test result shows that this system meets the need the demand and optimizes the current water supply well monitoring system.