Design Of Intelligent Car Networking Terminal Based On Android

With the development of science and technology and the acceleration of urbanization,the construction of urban road network has been gradually improved,and more and more people have their own private cars.How to connect the concept of "Internet +",which is popular in recent years,to ensure travel safety more effectively is a hot topic nowadays.Car terminal is produced under such circumstances,but in the current car market,almost every car related enterprise production of the own car terminal products,various vehicle-mounted system each regulation,however,does not establish a unified,the standardization of the standard.Until now,our country most of the car terminal equipment is based on the WINCE system,and because of its own has a series of disadvantages such as the limitation of the closure or function of the system reason,restricted the application of this kind of terminal on car networking.Aiming at the problems in the development of the Internet of vehicles technology,this paper proposes its own solution,which is to replace the traditional terminal with the intelligent Internet of vehicles terminal.The terminal system runs on the Android system and can be directly implanted into any Android machine for operation.During the development process,the following parts are mainly completed.In order to meet the needs of the enterprise,the mobile terminal is adopted in this design to replace the traditional car terminal,and a new intelligent vehicle terminal is developed based on the Android platform.Makes the enterprise can more accurately know the location of the enterprise staff,vehicles,ready to be ordered and real-time communication,and safety,improve the user experience.This paper first illustrates the current situation of the development of the Internet of vehicles,and puts forward its own solutions to the proposed problems,and replaces the traditional terminal with the smart car networking terminal.Then,several key technologies are introduced in the development process,and the demand analysis and overall design analysis of the system are given.Then based on the system's overall function module division,the realization of each function module are analyzed in detail,such as log in design,the design of the GPS communication,bluetooth communication design implementation,decentralizing the design of data acquisition module,multimedia application functions and the realization of the function of map navigation and so on.(1)The first part is the OBD module and terminal communication part.The OBD module is inserted into the vehicle to collect the vehicle data.The received data is encapsulated by the OBD protocol and then transmitted to the smart terminal through the Bluetooth protocol.The terminal passes the Bluetooth.Receiving data and analyzing the data according to OBD protocol,displaying the parsed vehicle data on the terminal interface to facilitate the viewing of the data,and save it in the database at the same time to prepare for the need.(2)The second part of the work implementation is the communication part of the terminal and the central server.This part implements the communication function through TCP/IP.The entire conversation process strictly follows the “three-way handshake” rule and establishes a Socket object to perform the link request.The data sent or received must be encoded and decoded according to the contents of the JT/T808 protocol.Different data packets have different headers.Based on the header,it is determined which protocol the data conforms to.The main part of the terminal is to actively link with the server.The data collected by the terminal is encoded according to the JT/T808 protocol and then sent to the central server.Or receive the data sent by the center server,decode according to the JT/T808 protocol,and then judge the next operation based on the obtained data.(3)The third part of the work is the realization of multimedia functions.By calling the API of the system,functions such as photographing,video shooting and recording are realized.These multimedia data are stored in their own specified manner and uploaded when the central server needs it.You can also call the call function to quickly dial the number of times during a crisis to help the designated user.(4)The fourth part of the work is mainly the storage of data.Since the application of this system is on Android,a variety of data storage methods are used for implementation.The password,system login status and other data are mainly stored through the Shared Preferences;the vehicle-related data obtained from the OBD is created through the lightweight database SQLite database table for storage;multimedia data obtained by the terminal such as video,pictures,etc.through the file Way to store.(5)The work in the fifth part is the realization of the map and the positioning of the vehicle.One of the most important functions of this terminal is its position navigation function.The Baidu map API is used to realize the map display function.At the same time,the GPS and the dual mode of network positioning are used to locate the vehicle in real time,and the positioning data is reported to the platform in real time.Through the realization of these functions,the system has reached the original intention of design,and it can achieve online real-time monitoring of traffic information,including location information,driver information,vehicle fault information and other data.At the same time,flexible use of various multimedia technologies to obtain more abundant data types.It can realize the real-time alarm to the driver,ensure the safety of the vehicle to a certain extent,and upload the data information to the monitoring platform.The obtained big data information can also be used for a second time through a large number of comparisons,such as researching the driver.Driving habits,etc.to develop more valuable products.Finally,this paper tests all aspects of the system according to the test cases.The final result shows that the terminal system has rich functions,simple operation,and can capture critical data in real time,and the overall operation effect is good,basically reaching the expected goal.