Research And Design Of Monitoring System Based On TTCAN Protocol

High quality monitoring system plays an important role in enterprise production and Improve the production efficiency and safety.With the expansion of industrial scale and improvement of automation requirements,Standard CAN bus is hard to meet the real-time requirement of complex network.in this case,the research of TTCAN protocol and its application in the monitoring system is of great importance.In the thesis,a network with Multiplexer CAN bus and Ethernet is designed base on analysis of the monitoring system node and data requirements.The essay proposed the application layer protocol which meets the actual system demands,and then generated message matrix.The optimization work of system matrix is completed according to message type,arranging special time window reasonably with differential evolution algorithm to raise the bus utilization ratio during the periodic message transmission.The G/M/1 queuing model is set up to analyze the Instantaneity of aperiodic message,the location and size of the arbitration window is guided by average queue length and waiting time.MATLAB simulation shows that differential evolution and queuing theory guidance improved bandwidth utilization ratio and Instantaneity.The monitoring system includes protocol conversion card and data measurement box,and realizes Communication conversion between CAN,SPI and Ethernet.According to the results of the experiment and running test,monitoring and control system completes the data acquisition and control commands transmission stably and efficiently,and has good performance in reliability and instantaneity.The monitoring system has been running in the factory.