Multiple temperature sensors embedded in an ultrasonic “spiral-like” waveguide | Zendy

Suresh Periyannan | Zendy; Prabhu Rajagopal | Zendy; Krishnan Balasubramaniam | Zendy

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Multiple temperature sensors embedded in an ultrasonic “spiral-like” waveguide

Author(s) -

Suresh Periyannan,

Prabhu Rajagopal,

Krishnan Balasubramaniam

Publication year - 2017

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4977965

Subject(s) - thermocouple , ultrasonic sensor , waveguide , materials science , spiral (railway) , planar , acoustics , optics , finite element method , ultrasound , temperature measurement , optoelectronics , composite material , physics , mechanical engineering , engineering , computer science , computer graphics (images) , quantum mechanics , thermodynamics

This paper studies the propagation of ultrasound in spiral waveguides, towards distributed temperature measurements on a plane. Finite Element (FE) approach was used for understanding the velocity behaviour and consequently designing the spiral waveguide. Temperature measurements were experimentally carried out on planar surface inside a hot chamber. Transduction was performed using a piezo-electric crystal that is attached to one end of the waveguide. Lower order axisymmetric guided ultrasonic modes L(0,1) and T(0,1) were employed. Notches were introduced along the waveguide to obtain ultrasonic wave reflections. Time of fight (TOF) differences between the pre-defined reflectors (notches) located on the waveguides were used to infer local temperatures. The ultrasonic temperature measurements were compared with commercially available thermocouples

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