The Vehicle Malfunction Diagnosis Analytical System Based On LabVIEW

The development of the auto industry plays an enormous role to the development of the international economy; the electronic technology of automobile constantly enters into our life of us too. In the electronic technology of the automobile, vehicle information analysis is a part that can't be ignored, it makes the transportation system of the traffic develop into a higher stage on the basis of information, it make traffic transportation system have intelligent management and organization. The security performance of the vehicle is a part that can't be ignored either. It is undoubtedly that improved the dependability, economy, security that the automobile uses, to the thing that diagnose the vehicle carries on the trouble, guaranteed the safe and reliable operation of the vehicle, at the same time, reduced the expenses that maintained produced blindly, for guaranteeing the security and economy, have obtained greater economic benefits and social benefit. At present, our automobile diagnoses that compared with foreign countries, there are a very big distances in technology, it has very important meanings for the trouble diagnosis of studying vehicle.This text puts forward that the vehicle malfunction diagnosis analytical system based on LabVIEW is gathered by a datum of collecting, data transmission, datum are analyzed and processed for the integrative application system. This system regards engine information of the automobile as the research object; Regard automobile body CAN network as the network platform, adopt the internationally agreed trouble to diagnose that protocol KWP2000 and the trouble diagnose codes, cooperating with the data processing software LabVIEW in the platform of Windows platform, to launch research work.This paper studies the methods mostly that data transmission and trouble analyzed and processed in vehicle malfunction diagnosis analytical system.The part of data transmission are made up by the CAN network and the CAN/USB gateway. The CAN network is responsible for transmitting the data mainly, these data are gathered to CAN node sensors which connect every part of the automobile, the CAN network transports the data to the CAN/USB gateway. The core of CAN/USB gateway controls 51 kernel one-chip computer P87C591 that are built-in CAN controller partly, it connects CAN transceiver and serial USB controller MAX3420, realizes the mutual conversion of CAN data and USB data;The part that the trouble is analyzed and processed runs on PC machine, it take the LabVIEW formidable data analysis ability as the foundation, has fully used each kind of function formidable data analysis storehouse which LabVIEW provides and controls, carries on breakdown processing with the figures and diagrams G language design breakdown diagnosis application procedure, unifies breakdown diagnosis code which in the KWP2000 agreement defines, carries each kind of data according to the vehicle which the network compiles, fast, accurate found the breakdown reason and provides the solution. The part that the trouble is analyzed and processed adopts the trouble diagnostic program which exploits DDE technology offered by LabVIEW, it realizes that LabVIEW and between the USB connection data transmission.This paper studies the system that vehicle trouble diagnose, can fast definite the position of diagnoses, find the reason of the trouble, help the maintenance personal to be fast, accurately fixing the breakdown. This technology is favorable to the fast development of the domestic vehicle malfunction diagnosis analytical system, and offers a new way, the analytical system of vehicle trouble diagnose that have very important economic worth and wide application prospect.