Reconfigurable self-calibrated multi-sensing RFID-based platform

Abstract

This paper concerns an RFID tag platform using an integrated temperature sensor and external pressure sensor targeted for the Electronics Product Code (EPC) Gen-2 standard operating in the 902–928 MHz ISM band. The developed system is part of a low-cost wireless sensors network node. This work demonstrates the study, development, and troubleshooting of battery-assisted sensing platform compliant to the RFID standard electronic product code Gen-2. Two main scenarios are tested to connect the sensors; passive and semi-passive tags. The two architectures allow collecting data based on either the RFID reader command or a signal processing program to save the sensing data using the integrated circuit memory. Temperature and pressure measurements are performed based on the integrated and external sensors combined in the RFID circuit board. Besides the fully integrated temperature sensor with a sensing precision of 0.5 C over the target temperature range, external pressure sensor is connected to provide a flexible way for additional sensors interfacing. Sensor are connected to a single system as the design is intended for a reconfigurable self-calibrated multi-sensing platform. The proposed sensing tags are fully verified through measurements.