Ultrasonic Coupled Passive Wireless Oscillating Sensor System

Aftab, Taimur; Schaechtle, Thomas; Hoppe, Joachim; Di, Shi; Schott, Dominik Jan; Reindl, L.

doi:10.3390/proceedings1040574

Cited by 2 publications

(1 citation statement)

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“…Based on a recently published comprehensive review on passive resonant sensors [ 19 ], and to the extent of our knowledge, no wireless passive sensor through an electrically conductive transmission medium over an acoustic channel has been reported in the literature. Preliminary experiments were carried out in [ 20 ] with airborne communication and a basic measurement setup. This contribution represents an extension to [ 21 ], with further characterization of the components, a detailed description of the signal processing concept, and an extensive evaluation of the performance of the instrumentation technique.…”

Section: Introductionmentioning

confidence: 99%

Wireless Passive Sensor Technology through Electrically Conductive Media over an Acoustic Channel

Schaechtle

Aftab

Reindl

et al. 2023

Sensors

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Hydrogen-based technologies provide a potential route to more climate-friendly mobility in the automotive and aviation industries. High-pressure tanks consisting of carbon-fiber-reinforced polymers (CFRPs) are exploited for the storage of compressed hydrogen and have to be monitored for safe and long-term operation. Since neither wired sensors nor wireless radio technology can be used inside these tanks, acoustic communication through the hull of the tank has been the subject of research in recent years. In this paper, we present for the first time a passive wireless sensor technology exploiting an ultrasonic communication channel through an electrically conductive transmission medium with an analog resonant sensor featuring a high quality factor. The instrumentation system comprised a readout unit outside and a passive sensor node inside the tank, coupled with geometrically opposing electromechanical transducers. The readout unit wirelessly excited a resonant sensor, whose temperature-dependent resonance frequency was extracted from the backscattered signal. This paper provides a description of the underlying passive sensor technology and characterizes the electric impedances and acoustic transmission as an electrical 2-Port to design a functional measurement setup. We demonstrated a wireless temperature measurement through a 10 mm CFRP plate in its full operable temperature range from −40 to 110 °C with a resolution of less than 1 mK.

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Section: Introductionmentioning

confidence: 99%