Design of autonomous multi-sensing passive UHF RFID tag for greenhouse monitoring
Résumé
When it comes to management modernization of greenhouses, UHF RFID technology, with its passive
character and low-cost and power consumption, presents a very efficient solution. To this end, an EPC
global C3 SL900A sensor tag is enhanced by integrating energy harvesting and multi-sensing capabilities.
The challenge of using only the fundamental carrier as an energy-harvesting source without the need
for other auxiliary energy or battery source is considered and evaluated. The developed architecture
uses a deep power consumption management strategy and operates autonomously under full passive
mode for sensing the required parameters in the grown monitoring process. This architecture does not
integrate any chemical components or batteries, making it safe and more suitable for agriculture-related
applications. It can also be considered as an auto-adaptive data-rate sensor device, such as the rate change
according to the amount of harvested energy. Furthermore, this architecture can write all sensors’ data
simultaneously into the tag IC user memory. This latter is easily accessible by any standard UHF RFID
reader.