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Torsional mode ultrasonic helical waveguide sensor for re-configurable temperature measurement
Published in American Institute of Physics Inc.
2016
Volume: 6
   
Issue: 6
Abstract
This paper introduces an ultrasonic torsional mode based technique, configured in the form of a helical "spring-like" waveguide, for multi-level temperature measurement. The multiple sensing levels can be repositioned by stretching or collapsing the spring to provide simultaneous measurements at different desired spacing in a given area/volume. The transduction is performed using piezo-electric crystals that generate and receive T(0,1) mode in a pulse echo mode. The gage lengths and positions of measurements are based on machining multiple reflector notches in the waveguide at required positions. The time of fight (TOF) measurements between the reflected signals from the notches provide local temperatures that compare well with co-located thermocouples. © 2016 Author(s).
About the journal
JournalData powered by TypesetAIP Advances
PublisherData powered by TypesetAmerican Institute of Physics Inc.
ISSN21583226
Open AccessYes
Concepts (12)
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    Thermocouples
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    Ultrasonic applications
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    Waveguides
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    GAGE LENGTH
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    Local temperature
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    PIEZOELECTRIC CRYSTALS
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    PULSE-ECHO MODE
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    REFLECTED SIGNAL
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    Simultaneous measurement
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    TIME OF FIGHTS
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    Torsional modes
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    Temperature measurement