Design And Research Of Intelligent Malfunction Warning And Service System

With the vehicle electronic control system is more and more complex, in enjoy the car bring us comfort and convenience at the same time, is also facing in automobile fault is more and more complex, it is difficult to determine the component failure, analysis of the type judgment difficult. The intelligent early warning system of vehicle fault has become an essential part of the automobile safety link, and its demand is also growing.Most automobile manufacturers only provide a standard OBD-II interface, is not equipped with a vehicle terminal. And the existing vehicle diagnostic terminal based on the Linux and other embedded operating system development, the existence of hardware need to design separately, and the structure is complex, the development of difficult, high cost.In order to improve the existing vehicle defects in fault and service system, in full consideration of the advantages of Android smartphones: more and more use number, powerful CPU, comes with a variety of hardware resources, easy to connect network and humanized operation interface, the design and implementation of the based on Android smartphone vehicle fault warning and service system.The system through a Bluetooth ELM327 chip of OBD diagnostic seat with the car’s ECU system information interaction is completed, ECU return vehicles operating parameters and fault information, according to the parameters reported a number, make a diagnosis and alarm. The owner can view car running status, 4S shop position through the the system, intelligent fault warning, LBS location information service, management of vehicle information, driver information, and maintenance records information.The main chapters of this paper:Chapter 1, introduction, first of all outlines the background and significance of the research, analyzes the current vehicle fault warning and service system development status, and to the domestic and foreign research status were reviewed in this paper. Chapter 2 firstly gives a brief introduction to the OBD system and history of the development, the system OBD-II related standard and the design of the use of related technologies; Chapter 3 is system needs analysis, from the business requirements, user needs, functional requirements, performance requirements, such as aspect introduced. The fourth chapter system overall design, the system development mode, the VCI interface design, the client software design, the server side design, the database design and data format design. The fifth chapter introduces the process of the realization of the system.. Including ELM327 initialization process, achieve client interface, activity of interface management, the core function of layer, layer implementation of basic function, fault early warning module, fuel consumption analysis. The sixth chapter is the system test, through the test vehicle running test, the feasibility of the system is verified; the seventh chapter is the summary and prospect..