Design and Development of ZigBee based Data Acquisition System for Air Temperature and Relative Humidity Monitoring

摘要

A ZigBee based data acquisition system for monitoring environmental parameters air temperature and relative humidity has been designed and developed. The system consists of a measurement node and a monitoring node. The measurement node is a wireless sensor node which includes a ZigBee transceiver, air temperature and relative humidity sensors, associated signal conditioners and necessary interfacing circuits. The monitoring node has a ZigBee transceiver and a host PC. The measurement node and the monitoring node communicate using ZigBee protocol. The measurement node measures the air temperature and relative humidity and transmits to the monitoring node on receipt of request for measurement data. A LabVIEW program has been developed for receiving, processing, presentation of the measurements on a graphical chart and for saving the data in a file for offline analysis. The program is executed on the host PC of the monitoring node. Air temperature and relative humidity measurements with the developed system and a standard thermo-hygrometer are presented.