摘要
基于DHT11温湿度传感器具有测量精度高、响应速度快、抗干扰能力强等优点。通过介绍DHT11数字式温湿度传感器的内部结构、工作原理、驱动方式及DHT11与微控制器LPC2138的接口电路、指令时序和温湿度测量过程,并通过该传感器构成的节点在一段时间内对大棚蔬菜内部环境进行际测试试验,试验结果表明,由该传感器构成的节点具有体积小巧、操作简单、功耗较低的优点,更加适用于目前对于温湿度现场检测的需求。
Based the digital temperature and humidity sensors DHT11 having the advantages of high accuracy, fast response and anti-interference ability and so on. The structure, working principle and the driver of the digital temperature and humidity sensors DHT11, the interface circuits, instruction timing, and temperature and humidity measurement process of the DHT11 and the microcontroller LPC2138 are introduced. And through used a node constituted of sensor for detecting the vegetables in greenhouses internal environment in a period of time. The test results show that the node with this sensor has smaller, simplicity of operation and lower power characteristics, more suitable for the current demand for temperature and humidity on- site inspection.
出处
《电子设计工程》
2013年第13期83-85,88,共4页
Electronic Design Engineering
