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.%为解决"传统火灾报警器只对火灾的某一种物理或化学信号进行探测而容易使报警系统出现误报或漏报"的问题,将多种传感器信息智能处理技术和CAN总线技术应用到火灾报警系统中,提出了设计火灾报警系统使用多个探测节点,节点利用多个传感器实施多元同步探测,并及时进行综合智能信号处理,主从节点间采用CAN总线进行实时通讯的方法.系统主、从节点均采用STM32系列单片机作为控制芯片,从节点连接MQ系列传感器采集火灾信号,主节点检测各从节点工作情况,且具有实时显示节点信息、存储历史记录等功能.经试验验证该系统对不同类型的火情都具有较高的灵敏度,CAN总线通讯信息及时可靠.
展开▼
