Sensor data transmission through passive RFID tags to feed wireless sensor networks

Abstract

The use of Radio Frequency Identification (RFID) technology for the automatic transmission of physical parameters in wireless sensor networks paves the way to a large class of attractive applications, ranging from healthcare to automotive, diagnostic systems, robotics and many others. Nevertheless, although some RFID tags capable to transmit sensor-like information are already on the market, only a limited number of sensors, such as those for temperature or pressure measurement, can be easily miniaturized and embedded in the RFID chip. The integration of more complex sensors, in fact, appears to be complicated and extremely expensive. In this paper, a cost effective general-purpose multi-ID tag is proposed. It can be connected to generic sensors, regardless of the actual measured value, and it is capable to transmit, when interrogated by a standard RFID reader, a proper combination of ID codes that univocally codifies the sensor measured value. The functionalities of this device have been extensively validated under stressing conditions and the capability to transmit whatever kind of sensor data has been demonstrated.

Hybrid Inertial Microwave Reflectometry for mm-Scale Tracking in RFID Systems

“…Moreover, if required, a customized RFID chip complying with EPCGlobal Gen2 protocol and containing an inbuilt inertial sensor may also be considered in a final product, thereby further increasing battery life. References [62][63][64][65] discuss methods for taking data gathered from external sensors and relaying their information through EPCGlobal Gen2-compliant RF tags.…”

“…The difference of two independent standard uniform random variables has the standard triangular distribution [106]. Under this case, the PDF for ϕ is expressed by (63) with zero mean and variance of π 2 6 , and is shown in Figure79.…”

Integration of an RFID Reader to a Wireless Sensor Network and its use to Identify an Individual Carrying RFID Tags

“…A pilot study on efficiently using WISPs through a dense sensing approach for monitoring and recognizing human indoor activities has been reported in [13]. (iii) A general-purpose RFID tag (referred to as S-tag) has been proposed in [14] for connecting to a generic sensor and transmitting, when interrogated, the measured physical parameter. Stags are very cost-effective as they use UHF for communication.…”

Unconventional UHF RFID Tags with Sensing and Computing Capabilities

“…1. Fabricated on a flexible substrate [8] and based on a multi-ID approach [9], the S-Tag can be connected to generic sensors and, when interrogated by a standard Gen2 reader, it is capable to transmit a proper combination of EPC codes that univocally encodes the sensor value. In [10] and [11], the electronic components of an augmented UHF RFID tag, including antenna, microcontroller unit (MCU), and sensors, are integrated in flexible organic substrates using inkjet-printing technology.…”