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  4. Miniaturized hybrid frequency reader for contactless measurement scenarios using resonant surface acoustic wave sensors
 
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Miniaturized hybrid frequency reader for contactless measurement scenarios using resonant surface acoustic wave sensors

Citation Link: https://doi.org/10.15480/882.3420
Publikationstyp
Journal Article
Date Issued
2021-03-29
Sprache
English
Author(s)
Scheiner, Benedict  
Probst, Florian  
Michler, Fabian  
Weigel, Robert  
Kölpin, Alexander  orcid-logo
Lurz, Fabian  
Institut
Hochfrequenztechnik E-3  
TORE-DOI
10.15480/882.3420
TORE-URI
http://hdl.handle.net/11420/9244
Journal
Sensors  
Volume
21
Issue
7
Article Number
2367
Citation
Sensors 21 (7): 2367 (2021-03-29)
Publisher DOI
10.3390/s21072367
Scopus ID
2-s2.0-85103077937
Publisher
Multidisciplinary Digital Publishing Institute
Due to higher automation and predictive maintenance, it becomes more and more important to acquire as many data as possible during industrial processes. However, many scenarios require remote sensing since either moving parts would result in wear and tear of cables or harsh environments prevent a wired connection. In the last few years, resonant surface acoustic wave (SAW) sensors have promised the possibility to be interrogable wirelessly which showed very good results in first studies. Therefore, the sensor’s resonance frequency shifts due to a changed measurand and thus has to be determined. However, up to now frequency reader systems showed several drawbacks like high costs or insufficient accuracy that blocked the way for a widespread usage of this approach in the mass market. Hence, this article presents a miniaturized and low cost six-port based frequency reader for SAW resonators in the 2.45 GHz ISM band that does not require an external calculation unit. It is shown that it can be either used to evaluate the scenario or measure the frequency directly with an amplitude or phase measurement, respectively. The performance of the system, including the hardware and embedded software, is finally shown by wired and contactless torque measurements.
Subjects
frequency measurement system
SAWsensor
wireless sensors
torque
radio frequency sensors
MEMS sensor
DDC Class
600: Technik
620: Ingenieurwissenschaften
Publication version
publishedVersion
Lizenz
https://creativecommons.org/licenses/by/4.0/
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