Image Reconstruction of Blockage in the Continuous and Stepped Pipelines by Noninvasive Acoustic Method

Abstract:

Article Preview

The image of a semi-circular blockage and location in the uniform and stepped pipe was reconstructed by measuring the eigen-frequency shift of the resonance and anti-resonance frequencies of multi-sine acoustic waves. In this study we have used different boundary conditions from previous works of Wu and Fricke [1] and De Salis and Oldham [2] to determine the blockage cross-sectional area and position. The results agreed with real fractional cross sectional area and position in the both continuous and stepped pipes. New approach showed a better quality of reconstructed image with small ripple number and the false dummy blockage signal was also reduced. The present method of blockage image reconstruction is a noninvasive nondestructive and can meet the integrity evaluation implementation for all types of transmission pipeline

Info:

Periodical:

Key Engineering Materials (Volumes 321-323)

Edited by:

Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi

Pages:

1640-1643

DOI:

10.4028/www.scientific.net/KEM.321-323.1640

Citation:

S. S. Jung et al., "Image Reconstruction of Blockage in the Continuous and Stepped Pipelines by Noninvasive Acoustic Method", Key Engineering Materials, Vols. 321-323, pp. 1640-1643, 2006

Online since:

October 2006

Export:

Price:

$35.00

[1] Q. Wu and F. Fricke: Journal of the Acoustical Society of America Vol. 87(1990), p.67.

[2] M.H.F. De Salis and D. J. Oldham: Journal of Sound and Vibration Vol. 221(1999), p.180.

[3] Q. Wu : Applied Acoustics Vol. 41 (1994), p.229.

[4] M.H.F. De Salis and D. J. Oldham: Journal of Sound and Vibration Vol. 243(2001), p.625.

0 0 . 2 0 . 4 0 . 6 0 . 8 1 . 0 1 . 2 1 . 4 1 . 6 1 . 8 2 . 0.

0.

1.

2.

3.

4.

5.

6.

7.

8.

9.

[1] 0 D is ta n c e X [m ].

0 0 . 2 0 . 4 0 . 6 0 . 8 1 . 0 1 . 2 1 . 4 1 . 6 1 . 8 2 . 0.

0.

1.

2.

3.

4.

5.

6.

7.

8.

9.

[1] 0 Sb / S0.

0 0 . 2 0 . 4 0 . 6 0 . 8 1 . 0 1 . 2 1 . 4 1 . 6 1 . 8 2 . 0.

0.

1.

2.

3.

4.

5.

6.

7.

8.

9.

[1] 0 (c ) P re s e n t m e th o d (b ) S a lis m e th o d (a ) W u m e th o d.

In order to see related information, you need to Login.