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采用单片机和数字式温湿度传感器SHT11,设计一种温湿度测量系统.介绍单片机控制温湿温度传感器SHT11的工作时序.给出温度测量系统的硬件电路和软件程序设计的方法,以及单片机对SHT11的启动,复位,读数据、写指令等相关程序.实现对测量温湿度的采集和显示.实验表明:测量的最大温度公差为±1.7%,在25℃时的最大相对湿度公差为±5%.系统具有测量精确,测量范围大,体积小,便于控制等优点.
Using the single chip microcomputer and digital temperature and humidity sensor SHT11, a temperature and humidity measurement system is designed.The operating sequence of the temperature and humidity sensor SHT11 is introduced.A hardware measurement circuit and software programming method are given, Start-up, reset, read data, write instructions and other related procedures to achieve the measurement of temperature and humidity collection and display experiments show that: the maximum temperature tolerance of ± 1.7%, maximum relative humidity at 25 ℃ ± 5% tolerance. System has the measurement accuracy, measurement range, small size, easy to control and so on.