The Key Technology Research Of Motor Vehicle Safety Performance Inspecting And Control System

Safety and environment protection are critically important in using automobiles. The Motor Vehicle Safety Performance Inspecting Line (MVSPIL) is an important tool to ensure vehicle safety both domestically and internationally. There are currently over 2000 MVSPILs of various kinds in use. This paper presents research in some of the most important issues to be resolved in the current state of MVSPIL worldwide. The results from the research have been successfully commercialized.The paper analyzes the current state of MVSPIL worldwide and conducts research in the folio whig areas:1 . The mechanics specific properties of the brake testers commonly in use have been analyzed. Base on this analysis, a method is designed to improve the measurement brake force precision and repetition in the brake tester. By choosing a suitable sampling number, applying signal processing and optimizing sampling rate, the braking force measurement had higher precision and repetition.2. The object-oriented method is applied hi designing computer control system of MVSPIL. A real-time, multitasking control system is designed and implemented using proper time-slicing algorithm. The system has good stability and real time responsiveness and is easy to supervise and test. It has been successfully used in many MVSPILs at city level.3. A design methodology of virtual MVSPIL is put forwarded for the first time and is applied in designing the systems on Windows platform. Combining with the object-oriented design method, the design of the multitask system is simplified in a large extent. The procedure section design of chain type enables positioning and tracking every stage in the operation of the system. The programming has nimble branches and fully satisfies the special needs of motor vehicle inspection.4. The MIDAS technology is used to design the computer control system of MVSPIL. The design of multi-layer database greatly simplifies the design of the user interface of the system. The thin client design meets the requirements of users. Allthese features combined greatly improve the visit efficiency of the database and the fault tolerance of the system, while guaranteeing the operation efficiency of the entire system.5. The technology of remote monitoring and diagnosis is applied in MVSPIL computer control system. A remote fault diagnosis system is implemented using Web database, Socket technology and the method of fault tree. The system can analyze the running status and diagnose the faults of a MVSPI remotely at client site.6. A complete design for control and management of MVSPIL is put forward. The design covers the control and debugging of MVSPIL systems, as well as the registration, logging and account management for vehicle inspection stations.