American Journal of Applied Sciences

Investigation of An Acoustic Temperature Transducer and its Application for Heater Temperature Measurement

Mohammad A.K. Alia and Tariq Al Mograbi

DOI : 10.3844/ajassp.2007.294.299

American Journal of Applied Sciences

Volume 4, Issue 5

Pages 294-299


Recent developments in temperature measurement have encouraged researchers to develop low-cost, simple structure, computerized generic transducers for environmental monitoring and industrial process control. The research presents a computerized technique which allows to measure temperature according to the variation of acoustic velocity (frequency) in a closed waveguide. Signal conditioning and processing was carried out using labVIEW (G Language) VIs. In order to evaluate the time characteristic of the transducer its response was compared with that of a reference detector (PT 100) for the same step input. Static characteristics of the transducer show a quasi-linear relationship between the measured temperature and the resonance frequency. Results of practical experiments show that in order to improve the response curve of the transducer and decrease the rising time interval it is advisable to implement thin-wall glass tubes or another material with lower thermal impedance.


© 2007 Mohammad A.K. Alia and Tariq Al Mograbi. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.