节点文献
基于CPCI的车载纠偏系统的研究与实施
The Lane Departure Warning System Based on CPCI
【作者】 陈伟琦；
【导师】 吴锡生；
【作者基本信息】 江南大学 ， 轻工信息技术与工程， 2009， 硕士
【摘要】 论文围绕车道偏离报警系统的设计开展了相应的研究工作,并最终建立了一个车道偏离报警硬件平台。车道偏离报警系统由视频采集处理模块,算法处理模块和报警电路组成。视频采集处理模块主要完成视频图像的采集和数字转换,而算法处理模块则是对数字视频图像进行信息提取,获得车辆的位置信息从而判断车辆是否偏离车道。报警电路则是在车辆偏离车道的时候对驾驶员提出警告。视频采集处理模块和算法处理模块之间采用CPCI总线进行连接。论文对系统中各个模块的设计作了详细的介绍。视频采集处理模块选择了Philips公司的SAA7111A和SAA7146A作为采集和处理芯片,对模拟视频信号进行数字转换并且对数字视频作简单的处理,并且编写了该模块在Windows下的驱动和应用程序。算法处理模块采用了ETX的方案,通过ETX底板将算法处理模块(即ETX核心板)和外围接口、视频采集模块、报警电路连接起来。报警电路则采用串行接口的语音提示模块。系统各部分设计完成后,视频采集处理模块和算法处理模块通过CPCI总线连接成系统,构建了车道偏离报警系统的实验平台,并在此平台上对系统进行了测试。
【Abstract】 The design of lane departure warning system is described in this paper, and the conformation of the experimental platform simulating the lane departure warning system is also introduced.The lane departure warning system is composed of the video capture module,the arithmetic process module and the warning module. The video capture module’s function is to capture video image and convert analog signal into digital signal. The arithmetic process module gets information of the digital video image which can obtain the position of the vehicle,and then estimates whether the vehicle depart the lane. The warning module reminds the driver when the vehicle depart the lane. The communication of the video capture module and the arithmetic process module is based on CPCI bus.The paper gives a detailed introduction of each component. The video capture module selects SAA7111A and SAA7146A which are produced by Philips Co. as video capture and process chips. The module converts the analog signal into digital signal and gives simple process to the digital video image. The drive and the application programme of the module are also introduced. The arithmetic process module is designed with ETX technology. The module (ETX core board ), peripheral interfaces,video capture module and the warning module are connected by the ETX expanding board. And the warning module chooses the voice notice module as the warining unit which has COM interface. After completing the design of each component, the experimental platform is conformed by connecting the video capture module and the arithmetic process module with CPCI bus. The lane departure warining system is tested in this platform.