基于单片机AT89C51和智能温度传感器DS18B20。温度测量点设置相应的温度上、下线。温度传感器DS18B20将温度转换成数字信号送入单片机，并与设定的报警温度上、下限值进行比较，信息通过LCD显示出来。如果实时温度超过设定的温度上、下限值，一方面由LCD显示信息，并发出报警声；另一方面自动控制继电器接通或断开，从而控制加热源的开与断，达到对温度进行实时监控的目的。-Based on AT89C51 microcontroller and intelligent temperature sensor DS18B20. Temperature measurement points set the appropriate temperature, the offline. Temperature sensor DS18B20 the temperature into a digital signal into the microcontroller, and with the set alarm temperature of the upper and lower limit comparison information through the LCD display. If the real-time temperature exceeds a set temperature of the upper and lower limits on the one hand by the LCD to display information, and alarm sound　the other hand, turn on or off automatic control relay to control the opening and breaking heat source to achieve temperature conduct real-time monitoring purposes.