The Research And Application In Internet Of Electric Vehicles

With the rapid development of Internet of Things technology,as an extension of the Internet of Things in the field of transportation systems,Internet of Vehicles technology is also a very hot topic.Electric vehicles are completely driven by electricity and easier to be precise control comparing to common cars,and they're more energy efficient,so Internet of Vehicles' application on electric vehicles is not only easier to achieve,but also gets policy support,so it will become developmental direction of electric vehicle industry.Referring to the information and technology related to the Internet of things,this paper proposes and designs an internet of electric vehicles scheme.In the electric vehicle part,embedded microprocessor and sensors are combined to collect its information,and the vehicle part exchanges data with cloud and client part through Wi-Fi/GPRS and other wireless communication technologies,then the users can view the status of their electric vehicles and remote control them.The construction of hardware platform is the basis of internet of electric vehicles,and it was designed under the consideration of users' demands and basing on Internet of Things' three-layer system.The hardware design part adopts the idea of modularization,different modules are designed partly at first,including the main control chip,sensors and communication units,and then connected the modules together through wireless communication or their external interface,so then a vehicle networking hardware platform is built.Among the hardware platform,the data acquisition module is composed of various types of sensors in vehicles,for the data processing unit,the STM32F407 chip launched by the ST company was selected as the main control unit,and useful data transmission modules were designed for the different communication needs between sensors and the main control unit and between the main control unit and the user terminal part.Inside the electric car,in order to improve the transmission efficiency between sensors and main control unit in the electric vehicle,a network protocol combining the retransmission and frequency jumping technology is designed for the sensor network via n RF24L01 wireless transceiver chip,so data transmission between sensors and main control chip can be faster and more reliable.In the aspect of software design,C/S structure is adopted.Mainly through the operation on Android application,users can achieve real-time view and remote control of their vehicles.In the Android application designing part,UI design,data processing module design and the connection with the electric vehicles are included,among them socket and Bluetooth communication are mainly introduced,and the data transmission between Android application and a vehicle was tested.In addition to the basic data processing and transmission functions,the electric vehicle's software functions also includes distance extender's control through Wi-Fi,vehicles positioning,remote upgrades and other functions.Finally,considering the problem that vehicles can only passively interact with users,a model based on logistic regression algorithm is designed in this paper,determining through the user's historical data of electric vehicles,we can predict the vehicle's trajectory and endurance,then a real car networking intelligent interaction can be realized.