LHI878热释电红外传感器的体温检测系统设计

Design of temperature detection system base on LH878 pyroelectric infrared sensor

设计一种以ATmage32单片机为核心的热释电红外体温测量系统。利用热释电红外传感器,设计一个非接触式的语音播报体温测量系统。采用热释电红外传感器来提取人体温度信号,同时由DS18B20测量环境温度信号,进行温度补偿减少测量误差。将提取的温度信号经过模拟处理后由AVR单片机控制实现对人体温度值的转换及处理,将得到的温度值送入LCD显示及语音播报。同时还加入了时钟功能和超温报警功能,使设计更具实用性。该体温测量系统测量范围为35~42℃,测量时间小于1s。该温度检测系统具有使用方便、灵活性好、可靠性高等优点,具有一定的推广应用价值。

A kind of pyroelectric infrared temperature measurement system was designed,which core was the ATmage32 SCM.It was a non-contact and voice prompt temperature measurement system by using pyroelectric infrared sensor.It used the pyroelectric infrared sensor to extrat the temperature of the human body and the DS18B20 to measure the environmental temperature,which could achieve the temperature compensation to reduce the measurement error.It could be controlled to realize the temperature convertion and processing,and sent the temperature value to the LCD to display and the voice prompt by the AVR SCM.Simultaneously,it was added the clock function and overtemperature alarm function to make the design more practical.The temperature measurement range was from 35-42℃.The measurement time was less than 1s.The temperature measurement system had the advantages of handy use,good flexibility,high reliability, and had a promotional value.