The Research On The Information Processing Technology In City Bus Information Integrated Control System

The functionality request on city bus becomes higher and higher along with the developing of the society and technology. The application of a lot of ECUs on city bus can fulfill the needs of passengers for bus's comfort, security and economy commendably, at the same time it can satisfy the tail gas emission control regulations constituted by the government.The ECUs are connected in the way of point-to-point now; they are isolated with each other and separated control, the communication of the messages in these ECUs working not well. Thus, the sensors have to be connected repeatedly and the wires' collocation becomes complexity. Aiming at improving the bus' performance we should realize the integration control of the ECUs, supervise their work state, and achieve the sharing of the messages among the ECUs utilizing the information, and compose the uniform control messages and state messages through judgment and reasoning.In this dissertation, we first constructed the structure of the CBIICS (City Bus Information Integrated Control System) in allusion to the characters of city bus, proposed the classify method of the system information and studied the select method in the point of the common information's discriminating, select process and the handling method.Secondly, the information describing method of the CBIICS was put forward based on the CAN bus protocol and the application layer protocol SAE J1939.Thirdly, this dissertation taking the CBIICS as the object designed the city bus information & message inquiring database based on SAE J1939 to satisfy the system bus designer's requirement.Finally, the city bus lamp control system was established in this dissertation. In this system, the hardware structure of the front and the back nodes was devised and the PC was used to simulate the main controller and to control the lamps. It had been validated that the information describing method and the main controller effective by the experimentation.The work in this dissertation is the bedrock of the CBIICS, and it will contribute to the city bus's networking and intelligent.