用热电阻Pt100做温度传感器，采用惠斯登电桥测量电路，将随温度变化的热电阻变化量转换成模拟电压信号；用LM324设计放大电路；以12位串行模数转换器ADS7816将模拟电压信号转换成为数字信号；单片机将采集到的数字信号经过平滑处理、变换成温度量用数码管显示出来。-To do with hot 电阻 Pt100 temperature sensor, the use of Wheatstone bridge measurement circuit, the temperature dependent change of resistance of the heat converted to analog voltage signal　with the LM324 amplifier circuit design　to the ADS7816 12-bit serial ADC analog voltage signal into a digital signal　single chip digital signal will be collected through the smoothing amount converted into a digital temperature control display.