Title :
Sensing of thermal thresholds using UWB RFID passive tags
Author :
Ramos, A. ; Lazaro, A. ; Villarino, R. ; Girbau, D.
Author_Institution :
Dept. of Electron., Electr. & Autom. Control Eng., Univ. Rovira i Virgili, Tarragona, Spain
Abstract :
In this work a wireless temperature sensor is developed to detect thermal thresholds. It consists of a completely-passive ultra-wideband radiofrequency identification tag, based on an antenna connected to a delay line. The delay line is loaded by a nitinol thermal switch. The switch modifies the amplitude of the backscattered signal when a temperature threshold is surpassed. The sensor is able to store the occurrence of the thermal threshold violation and performs the sensing activity independently of the reader interrogation. The length of the delay line defines a unique identification code for the sensor, which is read using a low-cost ultra-wideband radar.
Keywords :
delay lines; radiofrequency identification; switches; temperature sensors; ultra wideband radar; wireless sensor networks; UWB RFID passive tag; antenna; backscattered signal amplitude; completely-passive ultrawideband radiofrequency identification tag; delay line; low-cost ultrawideband radar; nitinol thermal switch; thermal threshold sensing; wireless temperature sensor; Metals; Radiofrequency identification; Shape; Switches; Temperature sensors; Wireless communication; Wireless sensor networks; RFID; UWB; nitinol; thermal switch;
Conference_Titel :
SENSORS, 2014 IEEE
Conference_Location :
Valencia
DOI :
10.1109/ICSENS.2014.6985300
