Realization Of Data Acquisition And Monitoring Systerm Based On Can Bus In Production Line

With the rapid development of automatic control and network technology, wireless technology is increasingly being accepted by all walks of life. We has exchanged and shared the message from field apparatus to control layer.In order to ensure real time and reliable data transmission, solve the problem that the data is prone to be interfered in the process of data transmission, and ensure the capability of the data acquisition and control system, CAN (controller area network) bus is taken as the field bus in the system to realize data transmission.CAN is called the Controller Area Network. which is one of the most widely used field bus. At present, in the industrial control system, CAN bus plays an enormous role on finishing data communication between underlying equipment, such as smart instrumentation, controls, actuators for completion of the scene.CAN is a kind of serial communication network that supports the distributed control and the real time control, and has the characteristics of high performance and high reliability. The repeated tests for the hardware and software of the system demonstrates the capability of the system, and embodies the obvious advantage of CAN bus in the aspects of the communication capability, reliability, real time, and so on.The background of subject research, the main application of the results of CAN bus, CAN bus communication protocol, RS-232communication protocol, data protocol conversion project between CAN bus and RS-232and signal data processing are expounded in detail. The system design and debugging problems arising in the course of experiment are analyzed carefully.