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Proceedings 2017, 1(4), 574; doi:10.3390/proceedings1040574

Ultrasonic Coupled Passive Wireless Oscillating Sensor System

Laboratory of Electrical Instrumentation, Institute of Microsystems Engineering, University of Freiburg, Freiburg im Breisgau, 79085, Germany
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
Author to whom correspondence should be addressed.
Published: 12 August 2017
(This article belongs to the Proceedings of Eurosensors 2017)
Download PDF [530 KB, uploaded 15 August 2017]


This paper presents, for the first time, an instrumentation technique for passively extracting a resonance frequency of a high-Q resonator across a wireless ultrasonic channel. As a first application, passive wireless measurement of temperature is presented along with a proof of concept of the wireless and passive operation of the device. Temperature resolution of 0.17 °C and a measurement range of 350 mm has been demonstrated.
Keywords: ultrasound; wireless sensor system; passive sensor node; temperature sensing oscillator; tuning fork resonator ultrasound; wireless sensor system; passive sensor node; temperature sensing oscillator; tuning fork resonator
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Aftab, T.; Schaechtle, T.; Hoppe, J.; Shi, D.; Schott, D.; Reindl, L. Ultrasonic Coupled Passive Wireless Oscillating Sensor System. Proceedings 2017, 1, 574.

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