Design And Implementation Of Intelligent Roadside System Of Cooperative Vehicle Infrastructure Based On FPGA

With the rapid development of our country’s economy,people’s living standards continue to improve,the vehicle ownership increases rapidly,traffic problems becomes more serious,which brings a lot of trouble to transportation regulators.As the future direction of the transportation system,Intelligent Transport System(ITS)can effectively utilize existing transportation facilities,reduce traffic load and environmental pollution and ensure traffic safety,improve transport efficiency,and therefore,it catches more people’s attention.And as the latest development direction of intelligent transportation system,the collaborative carriageway has extremely broad prospects.This article analyzes the smart roadside system which is the important part of collaborative carriageway.On the base of summarizing existing achievements,in order to monitor road conditions,traffic congestion,traffic accidents and other information,as well as to guide the vehicle,especially to focus on the most accident concentrated road intersection.This article designs a relatively complete system of roadside installed in the road or intersection,which greatly ease the traffic pressure.Due to the current single-chip functionality is relatively simple,the communication speed is not high,has been unable to take on large-scale intelligent roadside system design task.But FPGA gradually becomes the mainstream of embedded development platform and technology with the advantages of its fast running internal integrated PLL,rich I/O resources,efficient parallel execution mechanisms,short development cycle and its ability to build a second soft-core development.Therefore,this article uses the FPGA as development platform,using Verilog HDL hardware programming language to write camera capture display module and traffic lights timing module,while using SOPC technology to build a Nois soft-core processor,based on the TCP/IP transport protocol to complete the communication between the control center and car terminals and complete the roadside guide LCD screen display work at the same time.As the intelligent vehicle terminal is not the focus of roadside systems,Android handheld device emulation is used,using device’s own wifi wireless communication module to send vehicle information to smart roadside system.The control center uses Qt programming interface,which can more directly view received vehicle information and makes it convenient to send control information to smart roadside system.After the actual test run,the smart roadside system designed in this article performs stably,the network send and receive data quickly and accurately,traffic lights can run the program in accordance with good time,roadside guide LCD screen works well,video capture images relatively smooth,the system better meet the design requirement.