Research And Develplment Of Wireless Transmission System Of KT600 Automobile Fault Diagnosis Instrument Based On

With the rapid development of microcomputer control technology, Has been widely used in various fields, Because of the superiority of microcomputer control technology, electronic control systems of various advanced fully used in the car, Greatly improve the performance of automotive technology,From simple line at the outset, to automotive electronic control unit (ECU) as the core of the control system, And the car manufacturers to the vehicle assembly along with the car self diagnosis system (On-Board Diagnostic, referred to as OBD), Through the data line to automobile fault diagnosis instrument and vehicle diagnostic system for OBD diagnosis seat connected, you can easily "read" in auto electronic control system fault code, data flow, repair tips and other information. The vast majority of the current automobile failure diagnosis instrument is diagnosis system through a data line is about 1 meters long with the vehicle of transmission of information, and the diagnosis on vehicle seat are arranged in the driver’s cab, seriously restricted the convenience and flexibility to use automobile failure diagnosis instrument.Through the research of KT600 automobile failure diagnosis instrument cable communication system, car OBD-Ⅱ two communication protocol, The total research scheme of vehicle fault diagnosis instrument for wireless communication system:The RF technology into auto malfunction diagnosis instrument, Bidirectional wireless transmitter and receiver developed a set of CAN transceiver, STM32 MCU, nRF2401 wireless module in one, A literature survey method, comparative study method selected system hardware, Comparative study of selected the hardware of the system, through commissioning test software, Accuracy of the method at last by test data comparison test system, The same models were wired transmission and wireless transmission in the same condition test, And the choice of three models for testing, the test data shows that the wireless communication, the result is accurate, The realization of the KT600 by the wired transmission communication upgrading wireless communication, Address of the original automobile failure diagnosis instrument for cable constraints and the problem of inconvenient use, the automobile fault diagnosis is more flexible and convenient, System stability,easy control,reliable communication.