基于STC89C52单片机的温度报警系统设计与应用

本文设计了一种基于STC89C52单片机的温度检测及报警系统。该系统利用新型单总线式数字温度传感器DS18B20实现对温度的测试与控制。传感器通过并接在控制器的一个端口上，对各个传感器温度进行循环采集，然后将采集到的温度值与设定值进行比较。当温度超过设定的上限时，系统会通过蜂鸣器发出报警信号。 该系统的设计和布线非常简单，结构紧凑，体积小，重量轻。同时，该系统具有很强的抗干扰能力和性价比高的特点，为多点温度检测提供了便利。因此，在大型仓库、工厂、智能化建筑等领域，该系统有着广阔的应用前景。 关键词：数字温度传感器、DS18B20、STC89C52、蜂鸣器。 Abstract Temperature detection and control are one of the more typical applications in the industrial production process. With the more widespread application of sensors in production and daily life, using a new type of single-bus digital temperature sensor can achieve faster development in temperature testing and control. This paper designs a temperature detection and alarm system based on the STC89C52 single-chip microcontroller. Multiple single-bus temperature sensors DS18B20 are connected in series to one port of the controller. The temperature of each sensor is collected in a loop, and the collected temperature value is compared with the set value. When the temperature exceeds the set upper limit, the system will trigger an alarm signal through a buzzer. The design and wiring of this system are simple, with a compact structure and small size and weight. It has strong anti-interference ability and high cost-effectiveness, making it convenient for multi-point temperature detection. Therefore, this system has broad application prospects in large warehouses, factories, intelligent buildings, and other fields. Keywords: digital temperature sensor, DS18B20, STC89C52, buzzer.