Research And Development Of Portable Device In End Of Line CAN Bus Test Of Vehicle

With the wildly application and development of CAN bus technology in the automotive domain, the majority of domestic automobile manufacturers will introduce CAN bus to more and more cars, and the techniques and methods of testing these cars also need to be updated and developed. The traditional means of detection and diagnosis, cannot fully meet the need of the cars' production test, maintenance and diagnostics of body distributed control technology. Aimed at technical features of vehicle of CAN bus, a research and exploration of the corresponding test method has been done.In this paper, a scheme of the system with a portable computer is establish for the practical application to the EOL CAN bus test, and then design and research of the testing system software are followed. To develop establish the system scheme, we study in depth and explore test methods and management, and design three test mode in view of the practicality and re-usability of the test system. In the process of system software development, we program in LabVIEW, manage the test items in NI TestStand, make a research and optimization of SQL Server database connection for both software, and design user interface program of database maintenance and management finally.This study provides a feasible means of detection and treatment for the automotive CAN bus testing. In-depth exploration has been done and some new conclusions have been gotten in these aspects of change and design in the convenience of test cases, test data storage efficiency, etc. Commissioning not only verifies practical performance of the test system in the aspects of testing, data processing and others, but also feedbacks the reference information to enhance and improve the stability and re-usability of the bus test system.