Study On Intelligent Terminal System For Electric Vehicle

Electricization,networking and sharing is the trend of today's automotive development.With the promotion of national efforts,electric vehicles in the country by leaps and bounds,the degree of intelligent cars are also getting higher and higher,and now shared car has gradually become a trend.Shared car can well meet people's travel needs,the use of electric vehicles as a shared car on the one hand in line with national advocacy of low-carbon travel,on the other hand,electric vehicles is easy to control,the electric car and shared travel together is a good development trend.Similar to the smart car locks used on shared bicycles,EVs also require a terminal device that captures vehicle information and reverse controls vehicle doors and other functions.In this paper,aiming at the need of remote monitoring and control of shared electric vehicle,a vehicle intelligent terminal system is developed.The system mainly consists of two parts: vehicle terminal and background monitoring system.The system can realize the monitoring of electric running status,vehicle real-time positioning and some remote control.In the hardware circuit design of the terminal,the main controller chooses STM32F103 chip as the core processor,gets the vehicle's internal CAN bus message through the OBD interface of the vehicle,and obtains the related battery and related operation information of the electric vehicle according to the corresponding protocol.Access to vehicle positioning information through the GPS positioning technology,and using the GPRS module to pass information to the background server for information display;at the same time can also be issued through the platform to achieve the purpose of controlling the car,such as lifting the window,the door unlock operation.In the vehicle terminal embedded software program design,through the establishment of MDK5 project to achieve the development and debugging procedures,hardware-based STM32 firmware library based on the completion of the preparation,while using ?C / OS ? real-time operating system to schedule multiple tasks at the application layer.The background monitoring software is developed using LabVIEW visual programming environment to remotely monitor the running status of electric vehicles and GPS location information,reverse control vehicle and data storage and other related functions.The background monitoring software is deployed on the Ali Cloud server to satisfy Real-time monitoring and control requirements.Finally,hardware and software testing of the vehicle-mounted intelligent terminal system for electric vehicles is carried out,and the function is actually verified on a certain electric vehicle to ensure the feasibility of the terminal equipment and the monitoring platform,which can be promoted and used,and look forward to the development prospects of the entire system.