The Lane Departure Warning System Based On CPCI

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.