RFID AC Current Sensing Technique

Ullah, Irfan; Horne, Robert; Sanz-Izquierdo, Benito; Batchelor, John C.

doi:10.1109/jsen.2019.2949856

Cited by 18 publications

(10 citation statements)

References 10 publications

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“…The ability to interrogate a varying number of tags and reconstruct information about their surroundings has enabled a variety of applications. For example, localization [3], electricity metering [4], moisture sensing [5]- [7], mechanical deformation sensing [8], structural monitoring [9], in addition to fluids characterization [10] are among the various applications of RFID-based sensing. With UHF RFID readers becoming ubiquitous in various domains, RFID sensing can be considered a low-cost and low-maintenance approach to battery-less wireless sensing.…”

Section: Introductionmentioning

confidence: 99%

Wireless Ice Detection and Monitoring Using Flexible UHF RFID Tags

Wagih

Shi

2021

IEEE Sensors J.

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Owing to its low relative permittivity, very few microwave sensors have been developed for monitoring ice deposition. This paper presents the first use of UHF RFID tags for wireless RF ice sensing applications. Despite its low permittivity, the existence of ice as a superstrate on a planar ultra-thin dipole antenna can lower the resonance frequency of the antenna significantly. The RFID tags, having a measured unloaded range of 9.4 m, were evaluated for remotely detecting the formation of ice in various scenarios up to 10 m from the reader, as well as monitoring the ice thawing, based on the Relative Signal Strength (RSS) in a phase-free approach. In most RSS-based sensing approaches, the tag's read-range is reduced as the RSS decreases in response to the stimulant. However, the proposed sensing mechanism does not reduce the tag's range; the ice superstrate improves the impedance matching of the tags and increases their radar cross section (RCS), resulting in a 10 m loaded read-range with over 12 dB ice-sensitivity, in an echoic multi-path environment. The proposed sensing mechanism achieves an accuracy of 86% for tags positioned between 0.5 and 10.5 m with various obstructions. When subjected to line-of-sight metallic obstruction, the sensor still maintains 80% accuracy. The long range and high sensitivity of the proposed sensing mechanics show that UHF RFID is a promising method for detecting the formation of ice in future smart cities.

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Section: Introductionmentioning

confidence: 99%

Wireless Ice Detection and Monitoring Using Flexible UHF RFID Tags

Wagih

Shi

2021

IEEE Sensors J.

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show abstract

Section: Introductionmentioning

confidence: 99%

Wireless Ice Detection and Monitoring using Flexible UHF RFID Tags

Wagih¹,

Shi²

2021

Preprint

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Owing to its low relative permittivity, very few microwave sensors have been developed for monitoring ice deposition. This paper presents the first use of UHF RFID tags for wireless RF ice sensing applications. Despite its low permittivity, the existence of ice as a superstrate on a planar ultra-thin dipole antenna can lower the resonance frequency of the antenna significantly. The RFID tags, having a measured unloaded range of 9.4 m, were evaluated for remotely detecting the formation of ice in various scenarios and up to 10~m from the reader, as well as monitoring the ice thawing, based on the Relative Signal Strength (RSS) in a phase-free approach. Unlike conventional RSS-based sensing approaches where the tag's read-range is reduced as the RSS decreases in response to the stimulant, the ice superstrate improves the impedance matching of the tags, maintaining a 10 m loaded read-range with over 12 dB ice-sensitivity, in an echoic multi-path environment. The long range and high sensitivity show that UHF RFID is a promising method of detecting and monitoring ice formation and thawing in future smart cities.

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“…A passive RFID tag, consisting of a small lowprofile antenna and an RFID chip, receives energy from the nearby RFID reader and it responds by sending its unique ID information back to the reader. There has been a growing trend to leverage the low-cost, lightweight of RFID tags for various sensing applications in addition to its conventional role of identification and tracking, for example, temperature sensing [6]- [10], light sensing [11]- [13], tilt sensing [9], [14], [15], strain sensing [16]- [18], humid sensing [19], [20], chemical sensing [21]- [23], screw relaxing detection [24], flooding warning [25], current sensing [26], crack monitoring [27], biophysical sensing [28]- [32], aerial vehicles application [33], drowsy driving detection [34] and RF pen [35] . To guarantee the low-cost of the whole sensor platform that bulit on the RFID tag, that sensor should be compact, and the whole circuitry should operate without a battery.…”

Section: Introductionmentioning

confidence: 99%

Cost-Effective Wireless Sensors for Detection of Package Opening and Tampering

et al. 2020

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There is a need to develop a simple cost-effective approach for wireless detection of whether package is or was open en route during transportation. Existing approaches rely on electronic devices that need sensors with on-board and continuous power source for sensing and data logging. This paper presents three different battery-free, cost-effective, Radio-Frequency Identification (RFID)-based solutions for the detection of tampering or package opening. The first solution is for real-time opening detection. Opening or closing the package leads to unfolding or folding of the flexible-based antenna, which activates or deactivates the RFID tag. The second solution is for recording and memorizing package opening using a printed switch that shunts the antenna of the RFID tag. Opening causes a permanent disconnection of this switch activating the RFID. This change is irreversible; thus, the sensor memorizes the specific opening event without any additional electronic memory device. The third solution is for all-around package security using an RFID-based thread. Opening the package from any side allows changes in the radiation profile so the package condition can be wirelessly sensed. The approaches have been simulated and validated experimentally.

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RFID AC Current Sensing Technique

Cited by 18 publications

References 10 publications

Wireless Ice Detection and Monitoring Using Flexible UHF RFID Tags

Wireless Ice Detection and Monitoring Using Flexible UHF RFID Tags

Wireless Ice Detection and Monitoring using Flexible UHF RFID Tags

Cost-Effective Wireless Sensors for Detection of Package Opening and Tampering

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