Design Of Highway Toll Lane Controller Based On CAN Bus

China’s highway operating company charge fees for passing vehicles.As a key equipment of highway toll system,lane controller has very important research value and application prospects.It is used for toll management and equipment control of road lanes.Therefore,the performance of the lane controller directly determines the electromechanical level of the highway.At present,the problems of the lane controllers used in the toll lanes are as follows.First,the industrial computer is used as the core.It is equipped with many PCI devices such as serial port cards and video capture cards.Second,most operating systems use the Windows,so the lane controller software does not respond well enough in real time.Third,the connection between devices is complex and diverse,and the reliability is greatly reduced.To this end,a highway toll lane controller based on the Internet of Things researched and implemented in this thesis The highway toll lane controller developed in this thesis has the characteristics of simplicity,ease of use and strong expandability.The advantages of the Internet of Things technology are fully utilized by the controller,and the embedded design is integrated into it.The CAN bus is used by the lane controller to connect and control the fee display,automatic railing,traffic signal,canopy signal,information release screen and other devices.The main work of this thesis is as follows:firstly,based on the current research status of lane controllers at home and abroad,combined with the demand analysis of lane controllers by highway toll system,Overall design of the data communication,business functions and embedded architecture of lane controllers are carried out.Among them,data communication includes DSRC,RFID and CAN bus;software functions include charge management,temperature signal acquisition,power metering signal acquisition,lane device status acquisition and peripheral IO device drive and control;embedded architecture design including bus design,ARM processor,storage,drive and system peripherals.Secondly,the hardware circuit and interface of the lane controller are designed and implemented.The work includes the lane controller processor,communication module,temperature signal sensor,power metering module,CAN bus-based connection peripheral and corresponding device driver interface.Thirdly,the software interface of the toll lane controller is designed and implemented by MiniGUI.On the basis of selecting the appropriate software tools to build the Linux development environment,the hardware driver layer,hardware abstraction layer,business component layer and business process layer are adopted from the bottom up.The overall architecture functions are designed and developed in detail,including system charge management,temperature signal acquisition,power metering signal acquisition,and CAN bus function.Finally,the validity and reliability of the work of this paper are verified by the application of the toll station in Liaoning Highway.