Development Of Data Acquisition System Of New Energy Vehicle Based On Internet Of Vehicles

With the continuous increase of car ownership,the problem of energy and environmental pollution is becoming more prominent so that clean and efficient new energy vehicles emerge as the times require.At present,there are still some gaps between our country and western developed countries in the field of the development of new energy vehicles.One of the key technologies to study and improve the new energy vehicles is to collect and analyze the relevant data of the new energy vehicles during the process of driving,so as to improve the performance of new energy vehicles.Traditional methods of research on the performance of new energy vehicles are confined to indoor trials which cannot well mimic the state of new energy vehicles in the process of driving.In addition,recently,because of the popularity in sharing economy,the growing number of sharing cars in the streets can be seen.So the demand for the IoV(Internet of Vehicles)systems that can be used to monitor the sharing cars in real-time has also grown exponentially.Therefore,the design and development of a stable performance,powerful new energy vehicle data acquisition system based on Internet of Vehicles has a very important significance.In this thesis,a new energy data acquisition system based on Internet of Vehicles is designed and developed,which can not only collect and record the data from vehicles in real-time,but also can monitor the target vehicle's driving status,using status,position and track in real-time.The details are as follows:(1)According to the requirement analysis,the overall scheme of the on-board data acquisition and monitoring system is designed,and which is mainly divided into two parts,vehicle terminal and monitoring center.Vehicle terminal use the embedded STM32 motherboard as the carrier,with GPS module,GPRS module and Wi-Fi module to realize the I/O port high level output,CAN bus data and GPS data acquisition,data analysis,data packaging,sending the data to the monitoring center through the wireless network and other functions.As a monitoring platform,the monitoring center can display the real-time data from vehicle and real-time location.It also can store the data in PC,process and display the stored data subsequently.(2)Accomplished the selection and functional module testing of embedded vehicle terminal hardware,including STM32F107 motherboard's RS232 serial test,CAN interface test,I/O communication test,GPRS module test,GPS module test and Wi-Fi module test.Accomplished the integration of hardware system,then tested and analyzed the packet loss rate in GPRS communication mode and Wi-Fi communication mode.(3)Accomplished the development of embedded vehicle terminal software,using C language in Keil ?Vision4 environment,which including CAN communication,RS232 serial communication,GPRS communication connection establishment,GPS communication,Wi-Fi communication and other functions.(4)Use the Lab VIEW to accomplish the development of each function module of the monitoring center,including the establishment of TCP connection with client,data sending and receiving,data displaying,data storage and data processing,etc.(5)The real-time simulation platform based on Matlab/Simulink,VeriStand and hardware in the loop simulation technology is constructed for the hybrid vehicle data acquisition application,which can imitate real car to send CAN network data.The data is received and parsed by the vehicle terminal,and it is packaged with GPS data and sent to the monitoring center through GPRS wireless network.The test proves that the monitoring center can receive and display data correctly.Accomplished heavy engine OBD test.The OBD interface CAN network data is collected by the vehicle terminal,and then packaged and sent to the monitoring center via Wi-Fi wireless network.Accomplished the application of remote monitoring system for electric tricycle.The CAN network data and GPS data are collected and analyzed by the vehicle terminal,and then packaged and sent to the monitoring center through the GPRS network.Realized the real-time monitoring of vehicles.