基于51单片机的温度采集与报警系统，利用DS18B20实时采集温度信号传输给51单片机，当温度超过阈值时由单片机发出报警信号-51 microcontroller-based temperature acquisition and alarm system, using real-time collection DS18B20 temperature signal to the microcontroller 51, when the temperature exceeds the thresh