DESIGNING THE BOARD TO READ REAL-TIME VEHICLE DATA FOR TECHNICAL DIAGNOSING THROUGH THE OBD-II INTERFACE

Abstract

This article presents a method of designing a circuit that reads dynamic data of the vehicle through the OBD-II interface on the basis of the Can Bus Shield and Arduino Uno circuit. This communication circuit allows monitoring all vehicle parameters through sensors in real time. At the same time, the diagnostic method according to the signal threshold of the above parameters is also applied to monitor and diagnose the technical condition of cars. Through the actual test results, the real-time dynamic data monitoring device and diagnostic method can be applied to different types of vehicles with OBD-II interface. At the same time, monitoring a large number of vehicles in operation to help managers plan for operation, maintenance and choose a reasonable operating mode for vehicles is also the next main development direction of this research. The survey time of the dynamic data reading device is 0.02 s, faster (50 times) than the diagnostic machine is 0.1 s. The product price is cheap, 60% more compact than the car's diagnostic machine.