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根据单片机以及传感器的相关技术从而实现火灾自动报警系统。运用DSl8820数字温度传感器,能够把温度信号进行转变从而成为数字信号,最终把该信号发给单片机,设计的电路比较简单。另外系统中设置了温度报警值,通过其可以完成声光报警。本文检测烟雾部分选择了MQ-2型半导体烟雾传感器实现,该可燃气体的敏感元件的特点是高灵敏度、具有很强抗干扰能力,反应快,而且价格成本低,使用时间长。其中处理采集的数据中选择的是经常使用的AT89C51单片机。
According to SCM and sensor related technology in order to achieve automatic fire alarm system. Use DSl8820 digital temperature sensor, the temperature signal can be transformed into a digital signal, the final signal sent to the microcontroller, the design of the circuit is relatively simple. In addition the system has set the temperature alarm value, through which the acousto-optic alarm can be completed. In this paper, the smoke part of MQ-2 semiconductor smoke sensor is selected for detection. The sensitive element of the combustible gas is characterized by high sensitivity, strong anti-interference ability, fast response, low cost and long service life. Which deal with the data collected in the selection is often used AT89C51 microcontroller.