The Journal of the Acoustical Society of Korea

The Acoustical Society of Korea (한국음향학회)
권호 표지

Measurement of Axisymmetric-Wave Speed in a Pipe by Using Piezoelectric Cylindrical Transducers

원통형 압전 변환기에 의한 관 내 축대칭 파동 속도 측정

  • Hwang, Kyo-Kwang (Department of Mechanical Engineering, Soongsil University) ;
  • Kim, Jin-Oh (Department of Mechanical Engineering, Soongsil University)
  • Published : 2004.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

This paper presents an experimental technique to generate and detect axisymmetric longitudinal waves in a pipe by using piezoelectric cylindrical transducers. Radial pulses transmitted by one transducer have propagated in two opposite directions along the pipe, and other two transducers have received the propagating waves. The difference of the transit times measured for the waves in two paths of known distance difference has yielded the phase speed of the wave propagation. Wave speed has been measured in an empty pipe and in a water-filled pipe.

Keywords

References

  1. J. L. Rose, 'A baseline and vision of ultrasonic guided wave inspection potential,' ASME Joumal of Pressure Vessel Technology, 124, pp.273-282, 2002 https://doi.org/10.1115/1.1491272
  2. J. O. Kim, K. K. Hwang, and H, G, Jeong, 'Radial vibration characteristics of piezoelectric cylindrical transducers,' Joumal of Sound and Vibration, to be published, 2004
  3. L. C. Lynnworth, UHrasonic Measurements for Process Control, Academic Press, Boston, 1989
  4. J. O. Kim, K. K. Hwang, and H. H. Bau, 'A study for the measurement of a fluid density in a pipe using elastic waves,' Joumal ofthe Korean Society for NondestfUctive Testing, 23(6), pp, 583-593, 2003
  5. J. G. Lee, Vibration and Acoustic Characteristics for Developing a Cylindrical Ultrasonic Cleaning Device, Soongsil University Master Thesis, 2003
  6. Y. Uu and L. C. Lynnworth, 'Elastic wave sensing system,' United State Patent 5,456,114,1995
  7. Y. Coo and J. L. Rose, 'Guided waves in a water loaded hollow cylinder,' NondestfUctive Testing and Evaluation, 12, pp. 323-338, 1996 https://doi.org/10.1080/10589759608952856
  8. J. L. Rose, Ultrasonic Waves in Solid Media, Cambridge Universlly Press, Cambridge, 1999, Chapter 12
  9. H.-G. KiI, 'Analysis of the dispersion relation of elastic waves propagating on vibration cylindrical shells,' The Joumal of tIHi Acoustical Society of Korea, 20(4E), pp. 45-51, 2001