Research On Test Technology And System Of Characteristics Of The Combined Automobile Relays

Combined Automobile Relays are important parts of the electrical appliances in the automobile, and they must be designed and tested strictly in order to protect quality of relays. New test technology was researched in the term of Research on Test Technology of Characteristics of the Combined Automobile Relay, and applied to the Automatic Testing System of the combined automobile relays successfully.The main work and contributions as follow:Firstly, we researched the structure and electric parameters of the combined automobile relays carefully, put forward the test methods and designed the test circuits of these parameters. Owing to good plans, the Automatic Testing System based on Virtual Instrument was realized-successfully.Secondly, it was described in the dissertation that the structure and components of the Virtual Instrument System dealing with the combined automobile relays based on PCI and GPIB. In addition, we analyzed characteristics of every instrument of the test system.As key problems, the control, communication and synchronization, such as relay arrays control and GPIB communicatipn, of the Virtual Instrument Systemwere discussed carefully in the dissertation. We also discussed some anti-jamming solutions of the system.Finally, we designed the test software and analyzed flow charts of important function modules, realization of general function modules and the interface methods between LabVIEW and other Windows applications. Then the test results were shown and analyzed in the dissertation.In conclusion, we reached the design targets of the testing system and tested the electric parameters of the combined automobile relays accurately.