摘要
火灾报警系统由多个区域报警控制器和集中报警控制器组成。文章介绍了一种用DS18B20作为测温报警元件,以RS485通信总线为主干网的火灾报警系统,阐述了系统的构成和报警功能基本实现。说明了对应房间号报警上限存储、报警处理与报警信息存储的方法。对修改报警上限时如何寻找存储器E2PROM对应的地址进行了分析。设计了报警处理的基本程序。实现了能够将报警温度与报警地点及报警时间进行存储、能够以声光等多种方式进行报警的功能。解决了传感器、存储器E2PROM、实时时钟电路和报警电路等多个方面的软硬件设计与协调。文章中介绍的方法较好地实现了火灾报警系统中当温度升高超出报警上限时,快速准确地预报。现场模拟实验表明,系统安全且稳定可靠。
The fire alarm system consists of many area alarm controllers and convergence alarm controller. This paper introduces a fire alarm system that DS18B20 was temperature measurement element and communication network is RS485 communication bus. The system structure and alarm functions realization were expounded. Illustrates storage of alarm upper limit, alarm process and alarm message storage. How to find the address of E2pROM is analyzed when alarm upper limit is amended. The basic program of alarm process was designed. Alarm temperature, alarm place and alarm time can be stored. The alarm function can be realized by sound, light and so on. The design of software and hardware was realized. The harmony for sensor, memorizer E2PROM, real clock and alarm circuit design are solved. This method can predict the temperature over high quickly and accurately, when the temperature exceeds alarm upper limit. The experiment shows the system was safe, stable and reliable.
出处
《自动化与仪表》
北大核心
2010年第9期49-51,60,共4页
Automation & Instrumentation
基金
北京市教育委员会科技发展计划项目资助(KM200910772008)
