Comprehensive diagnostic equipment for vehicle off-lineOverseas development status

The development of foreign automobile detection technology is mainly concentrated in some developed countries. Starting from the 1950s, in the late 1960s, some foreign automobile detection technologies began to develop rapidly in diagnostic technology, applying physics, electronics, optics and other principles. The birth of microprocessors and the development of computer technology in the 1970s laid a solid foundation for the VCU control unit, and automated vehicle detection equipment has been developed, such as data acquisition and processing, output printing detection results, etc., data acquisition and processing, output printing detection results, etc. By the 1980s, computers have been further developed in this field, and gradually integrated system software for various detection and data processing functions, realizing a fully automatic vehicle detection line. This kind of human error judgment has been avoided, and the accuracy and efficiency of the test have also been improved.

Fault diagnosis is based on the detection of some performance parameters of the vehicle. It can determine the condition of the vehicle, identify and judge the obstacles of the vehicle, and thus provide a guarantee for the reliability and safe operation of the vehicle. Electronic control units are widely used, and the fault diagnosis of the automotive electrical control system has turned to vehicle-based diagnosis at the beginning. By the 1980s, in addition to being able to report the operating status of the vehicle during the use of the vehicle, the vehicle detection process can also rely on the vehicle's own fault self-diagnosis function to achieve more convenient testing of the project. In the 1990s, as the vehicle diagnosis system was improved, the standards were also unified. Since 2000, the scope of automotive diagnosis has been expanded, the ability to diagnose and predict complex obstacles has been improved, and automotive detection and fault diagnosis technology has continued to develop.

Generally speaking, in some developed countries, automobile inspection has been "institutionalized", basic technical inspection has been "standardized", and inspection technology is developing towards "intelligent and automated inspection". In the future, the development direction of automobile inspection technology will be to improve the diagnosis and prediction capabilities of vehicles by developing a system to predict obstacles, so that vehicles can maintain a good safety state and achieve unity with inspection, prediction and diagnosis.