火灾温度报警器的设计与实现

Design and implementation of the fire temperature alarm

分析了温度传感器中温升式温度传感方式和温差温度传感方式的特点和区别,利用离子式烟雾报警专用芯片A5348设计了一种不需要转换开关就可以自动选择这两种传感方式的温度报警器,给出了设计原理图以及安装调试的方法。该报警器对于突发的火情和隐蔽火情均可正常工作,使用方便。

This article analyses the two temperature sensing methods in temperature sensor, which are the temperaturc rising and the temperature difference. This article aslo analyses the characteristics and differences of the two ways. The ionic smoke alarm dedicated chip A5348 is used to design the fire alarm, which can select the the temperature automatically and don＇t need to change-over switch of the two sensing methods. The schematics and installation of the methods are given in the paper. The alarm for the burst of fire and hidden fire can work properly, which is easily to use.