Design and implement of fire detector based on CAN bus

ZHAO Zhe, QIN Huibin
(College of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, China)

Abstract: In order to solve the problems of false negative and false positive of traditional fire detectors with single sensor, the technology of multisensors information processing and CAN bus was proposed to apply the fire detector. A design method of using several detecting nodes to monitor fire information was presented. All the nodes use the series of STM32 MCU as the microcontroller, and communicate with each other by CAN bus, forming a masterslave structure. MQ sensors were used by slave nodes to determine whether the fire is occurred, and the master node was used to verify slave nodes working correctly. It has functions of realtime display information and storage history data. The results of experiments show that the system has a high sensitivity to different types of fire, and the information communicated by CAN bus is timely and reliable.
Key words: fire detection; multisensors; controller area network(CAN) bus