基于多谐振荡器的AT89S51单片机温度控制

Design of Temperature Control Circuit Based on Multivibrator and AT89S51 Single Chip Microcomputer

提出了一种基于多谐振荡器的AT89S51单片机温度测量的设计方案.利用温度传感器测量外界温度,通过多谐振荡器将传感器的阻值转换成频率信号,利用AT89S51单片机的定时器/计数器测量振荡电路的振荡频率,由查表法得到实际温度值.

The paper proposes a design scheme of temperature measurement circuit based on multivibrator and AT89S51.and measures the temperature by thermistor, the resistance of thermistor is converted into a frequency signal through multivibrator, oscillating frequency is measured by using the timer and counter of single chip microcomputer. The actual temperature is attained by table look up scheme.