Study and Design of Building Intelligence Monitor and Alarm System Based On CAN Bus Technology

An intelligent multi-input monitor and alarm system is designed based on CAN bus technology.The detection signal is collected and processed based on the core of AT89C51 and AT89C51 controls the CAN bus controller SJA1000/transceiver PCA82C250 to constitute CAN bus communication system to transmit data.Through the serial interface MAX232 connected main controller with each control node,up PC can monitor and control each node in real-time and renew control-schemes.This system has achieved higher requirement in safety,accuracy and real-time operation in message transmission.Experiments shown that the system has yielded the rate of control and alarm of 100%.Intelligent arithmetic can easy to replant based on the better hardware plat,satisfy more need of monitor and control,and its application foreground is bright.This paper introduces design principle and the methods of hardware/software in detail.