Design and Research of Safety Monitor and Control System Based on CAN BUS

In order to protect machine operator under danger work area in producing-manufacturing indus- try,we present a distributed safety monitor and control system based on CAN BUS technology.The de- tection signal is collected based on the photo-voltage characteristics of the infrared sensor and it was pro- cessed with the core of AT89C51.The microprocessor controls the CAN BUS controller SJA1000/trans- ceiver PCA82C250 to structure CAN BUS communication system to transmit the data.Through the serial interface MAX232 connected main controller with each control node,PC can monitor and control each machine in real time and renew control scheme.This paper introduces composition principle and the methods of hardware design in detail.Experiments shown that the system has yield control precision of 0.1mm,defend distance more than 15m and the measurement accuracy of 100%.Moreover,it can realize to reform FA431 and monitor cotton-breaking,yarn-breaking and product quality.Productivity is im- proved about 25%-35%.