The Automotive Anti-collision Radar Signal Processing Research And System Design

With the development of microelectronics,image processing,computer networks and embedded technology.Internet technology applications and development of rapid growth,and video surveillance as an integral part of the Internet of things,is the traditional analog like a highly integrated d igital,network,miniaturization,intelligent direction.This paper discusses the design scheme of wireless network video monitoring in the application environment of the Internet of Things,and builds the system on the embedded platform.Through the wireless network access network,the function of multi-user through the web browsing video and moving object detection alarm is realized.The bottom of the system to S5PV210 as the core hardware platform,transplant uboot,Linux kernel,network card driver,sound card driver and camera driver,designed the root file system.The system is divided into video capture module,video compression module,video transmission module and moving object detection module.The video capture module uses the V4L2 standard for image acquisition and uses the multiplexed epoll mechanism to monitor the device file.The video compression module uses JPEG compression to verify the compression ratio of JPEG compression in order to verify the possibility of JPEG compressed image data transmission on the network.The video transmission module uses the wireless network card to access the network and transmit the data through the Internet.Module to build an embedded web server,the use of HTTP protocol in response to requests from the web page,the use of TCP protocol stream socket data transmission,and the video data displayed on the page;moving object detection module completed by the frame difference method Monitoring of the moving object detection function;the system in the Linux operating system,based on the use of multi-threaded way to coordinate several modules of data synchronization.Finally,the system has been tested,the experimental prototype system can perform single-point input of video,multi-point output;transmission rate of up to 25 images per second,the image size of 320 × 240;to achieve the mobile object detection alarm function,completed the Design the task of booking.