The Research Of Automobile Digital Sensor Data Transmission Technology Based On CAN BUS

Along with the development of automotive electronics,automotive network bus turns into trends and becomes an important link of automotive electronics,in order to reduce wiring,enhance signal utilization,and share the high-volume data transmission.CAN bus has become the mainstream of automotive network bus with its high-performance.But the CAN bus research of domestic automotive industry is at the initial stage,the relevant technologies between the home and abroad is behind more than ten years.As for the domestic CAN bus study remains in the basic function research stage,the network with that constuction is not flexible,only for a fixed volume of data and the small volume of data communications.Because the number of vehicle sensors and intelligent control system is increasing,the vehicle network data transmission is growing,and becoming more complex,and the information sharing becoming more demanding.The basic CAN network has been unable to meet the requirements of automotive electronics and networking,so it is necessary to build more advanced CAN network.The aim of this paper is to do a little contribution to digest and absorb foreign revelant technologies,to narrow the technology gap between home and abroad,to promote the relevant technologies nationalization and related products low-cost,based on the research of SAE-J1939 protocol and the feasibility and functionality of automotive communication network this protocol-based.This paper are based on the completed several works.Firstly,vehicle digital sensor has designed for data acquisiton,so that the analog signals of automotive can be digitized.Secondly,a full analysis and discussion has been done to the CAN bus protocol and SAE-J1939 standard protocol.Thirdly,the design of SAE-J1939 based communications platform code and hareware circuit has been done to realize SAE-J1939 communication basic functions.Fourthly, the simulation and modeling of SAE-J1939 network has been completed with CANoe tools.Fifthly,the SAE-J1939 network communication's real test environment has been built,thereby test and the analysis of test result has been finished.