基于单片机的自动温度测量报警系统设计

目前,在自动控制领域用温度作为一种控制量对系统进行自动控制已经越来越普遍。针对这种实际情况本文设计了一种简单实用的温度报警系统。该系统以AT89C51单片机为中央处理单元,大大降低了系统开发的成本。通过温度传感器LM35采集外部的温度,并将温度转换成相应的电压值。A/D转换装置对电压值进行模数转换,将结果送入中央处理单元进行计算。单片机根据其处理的结果决定是否需要启动报警装置。结果表明,该系统可以在5~150℃环境下工作,当外界的温度达到设定的报警温度时该系统能够及时地做出反应,具有一定的现实价值。

Design for auto temperature alarm system based on SCM

Now it is very common to use temperature as a control volume to achieve automatic control.This paper designed a simple and practical auto temperature alarm system to meet the actual condition.This system uses SCM AT89C51 as the central processing unit,it can greatly reduce the cost of the system development.The temperature sensor LM35 is used to collect the temperature which is converted to the voltage value.AD converter converts the analog value into the digital value,then the digital value is sent to the CPU for calculation.The SCM will decide whether to start the alarm system which depended on the results of the processing.The result shows that the system is able to work under 5～150℃.When the external temperature reaches the setting value,the system can make a reply in time.So it has a certain practical value.