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Improvement of an Ultrasonic Transducer for Measuring Both Flow Velocity and Pipe Thickness
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 Title & Authors
Improvement of an Ultrasonic Transducer for Measuring Both Flow Velocity and Pipe Thickness
Kim, Ju Wan; Kim, Jin Oh;
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 Abstract
The paper deals with improvement of a piezoelectric ultrasonic transducer for measuring both pipe thickness and flow velocity. The transducer structure is based on the conventional transducers for measuring flow velocity by obliquely transmitting ultrasonic waves to the flow direction. The transducer invented earlier for measuring flow velocity and pipe thickness had an advantage of including only one piezoelectric disc, but for the thickness measurement the ultrasonic wave had to be reflected twice in a wedge material to be transmitted vertically to a pipe, and thus the wave signal was too weak. The transducer has been improved to transmit waves for thickness measurement vertically to a pipe without any prior reflection by electrically connecting two piezoelectric discs, one for flow velocity and the other for pipe thickness measurement. By comparing the measured results of specimen thickness with the improved transducer and conventional transducers, the accuracies of the improved one have been evaluated in the pipe thickness measurements.
 Keywords
Transducer;Ultrasound;Propagation;Pipe Thickness;Flow Velocity;
 Language
Korean
 Cited by
 References
1.
Kim, J. O., 2000, Ultrasonic Sensors and Actuators, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 10, No. 5, pp. 723~728.

2.
Lynnworth, L. C., 1989, Ultrasonic Measurements for Process Control, Academic Press, New York, Ch. 4.

3.
Kim, J. O., Piao, C. and Kim, D. H., 2015, Ultrasonic Transducing Apparatus for Measuring Pipe Thickness and Apparatus for Measuring Flow Velocity Using the Same, Korea Patent 10-1513697.

4.
Kim, J. W., Piao, C., Kim, J. O. and Park, D. S., Ultrasonic Transducers for Measuring Both Flow Velocity and Pipe Thickness, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 25, No. 8, pp. 559~567. crossref(new window)

5.
Funck, B. and Mitzkus, A., 1996, Acoustic Transfer Function of the Clamp-on Flowmeter, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Vol. 43, No. 4, pp. 569~575. crossref(new window)

6.
Lee, Y. J. and Im, J. I., 2006, Development and Evaluation of the Piezoelectric Transducer for the Transit-time Ultrasonic Flowmeters, Journal of the Institute of Electronics Engineers of Korea, Vol. 43, No. 4, pp. 30~34.

7.
Kim, T. E., Chun, H. Y., Kim, J. O. and Park, J., 2010, Mode Conversion and Energy Transmission Ratio of Elastic Waves, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 20, No. 3, pp. 296~307. crossref(new window)

8.
Piao, C., Kim, D. J. and Kim, J. O., 2015, Energy Transmission of Elastic Waves in Ultrasonic Transducers, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 25, No. 2, pp. 124~132. crossref(new window)

9.
Kim, J. O. and Kim, J, W., 2015, Ultrasonic Transducer for Measuring Both Flow Velocity and Pipe Thickness, Korea Patent 10-2015-0145164.

10.
Kim, J. W. and Kim, J. O., 2015, Improvement of an Ultrasonic Transducer for Measuring Both Flow Velocity and Pipe Thickness, Proceedings of KSNVE Fall Conference, pp. 518-521

11.
Achenbach, J. D., 1975, Wave Propagation in Elastic Solids, North-Holland, Amsterdam, Chapters 1 & 5.

12.
Kim, J. W., Piao, C., Kim, D. J., Kim, J. O. and Park, D.-S., 2015, Comparison of Ultrasonic Paths for Flow Rate Measurement, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 25, No. 7, pp. 455~461. crossref(new window)