说明：  本程序介绍的是一个智能温度检测系统，该系统通过NTC热敏电阻阻值随温度升高而减小的属性，并通过ADC0803模数转换芯片采集数据，最后将数字信号送入89C51单片机，经过软件的处理与控制，在LED上输出实时的环境温度。同时该系统可设置测量温度上下限，当前温度低于设置温度下限或高于设置温度上限时，通过蜂鸣器报警。经过实践验收测试，该温度计具有电路简单、读数方便、测温准确、精度高、测量范围广、低能耗等优点，设计方案正确行，各项指标稳定可靠。温度可测范围：0~40℃。温度测量误差：±0.5℃。
(This procedure is described in an intelligent temperature detection system, the properties of the system by the NTC thermistor resistance decreases with increasing temperature, and ADC0803 analog-to-digital conversion chip data collection, and finally the digital signal into the 89C51 microcontroller, after processing and control software, the LED on the output of the ambient temperature in real time. The system can be set upper and lower limits of the measuring temperature, the current temperature is below the set temperature lower limit or higher than the set temperature limit alarm buzzer. After practice, acceptance testing, the thermometer has the circuit is simple, easy to read, accurate temperature measurement, high accuracy, wide measurement range, low power consumption and other advantages, design the correct line, the indicators are reliable. Temperature measurement range: 0 to 40 ° C. Temperature measurement error: 0.5 ° C.)