Acoustic waveguides: an attractive alternative for accurate and robust contact thermometry
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Published version
Author(s)
Wang, Y
Zou, F
Cegla, F
Type
Journal Article
Abstract
We report a robust and very precise method of measuring temperature using ultrasonic waves. Solid stainless steel waveguides are used to provide well-defined and stable ultrasonic wave propagation paths. Ultrasonic wave velocity is strongly temperature dependent. The arrival times of the ultrasonic wavepackets along a waveguide are used to infer the average temperature of the waveguide. Our ultrasonic temperature measurements exhibit a high precision (i.e. ±0.015 ⁰C) that is more than two times better than the quoted accuracy of 1/10 DIN resistance temperature detectors (RTDs). The responsiveness of the waveguides was also investigated. While ultrasonic measurements can be made at very high frequencies, the responsiveness is limited by the heat transfer into the active sensing area. The waveguides make it easy to customise the dimension of the active sensing area and a shorter response time than those of RTDs has been demonstrated. The technique presented in this paper is a robust and cost effective alternative to other contact temperature measurements.
Date Issued
2017-12-23
Online Publication Date
2017-12-23
Date Acceptance
2017-12-20
ISSN
0924-4247
Publisher
Elsevier
Start Page
84
End Page
88
Journal / Book Title
Sensors and Actuators A: Physical
Volume
270
Copyright Statement
© 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/4.0/).
(http://creativecommons.org/licenses/by/4.0/).
Source Database
manual-entry
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Grant Number
EP/K033565/1
Subjects
0906 Electrical And Electronic Engineering
0912 Materials Engineering
0913 Mechanical Engineering
Nanoscience & Nanotechnology
Publication Status
Published