- Guided Waves for Plate and Pipe Inspection

2016 ◽  
pp. 310-409
Keyword(s):  
Guided Waves ◽  
Pipe Inspection

Guided Wave Focusing Mechanics in Pipe

2003 ◽  
Author(s):  
Takahiro Hayashi ◽  
Koichiro Kawashima ◽  
Zongqi Sun ◽  
Joseph L. Rose
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Guided Waves ◽  
Wave Structure ◽  
Guided Wave ◽  
Pipe Inspection ◽  
Specific Point ◽  
Wave Focusing ◽  
Beam Focusing ◽  
Subsequent Time

Guided waves can be used in pipe inspection over long distances. Presented in this paper is a beam focusing technique to improve the S/N ratio of the reflection from a tiny defect. Focusing is accomplished by using non-axisymmetric waveforms and subsequent time delayed superposition at a specific point in a pipe. A semi-analytical finite element method is used to present wave structure in the pipe. Focusing potential is also studied with various modes and frequencies.

2829 Development of pipe inspection equipment with guided waves

2006 ◽  
Vol 2006.1 (0) ◽  
pp. 307-308
Author(s):  
Takahiro HAYASHI ◽  
Morimasa MURASE ◽  
Masahiro NAGAO
Keyword(s):  
Guided Waves ◽  
Pipe Inspection

Guided Wave Focusing Mechanics in Pipe

2005 ◽  
Vol 127 (3) ◽  
pp. 317-321 ◽  
Author(s):  
Takahiro Hayashi ◽  
Koichiro Kawashima ◽  
Zongqi Sun ◽  
Joseph L. Rose
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Guided Waves ◽  
Wave Structure ◽  
Guided Wave ◽  
Pipe Inspection ◽  
Specific Point ◽  
Wave Focusing ◽  
Beam Focusing ◽  
Subsequent Time

Guided waves can be used in pipe inspection over long distances. Presented in this paper is a beam focusing technique to improve the S∕N ratio of the reflection from a tiny defect. Focusing is accomplished by using nonaxisymmetric waveforms and subsequent time delayed superposition at a specific point in a pipe. A semianalytical finite element method is used to present wave structure in the pipe. Focusing potential is also studied with various modes and frequencies.

Guided Wave Resonance Tuning for Pipe Inspection

2002 ◽  
Vol 124 (3) ◽  
pp. 303-310 ◽  
Author(s):  
James Barshinger ◽  
Joseph L. Rose ◽  
Michael J. Avioli,
Keyword(s):  
Guided Waves ◽  
State Of The Art ◽  
Guided Wave ◽  
Pipe Inspection ◽  
Probe Position ◽  
Future Directions ◽  
Single Probe ◽  
Wave Resonance ◽  
Resonance Tuning ◽  
Wave Modes

Tremendous interest has surfaced recently on the use of guided waves in pipe inspection in the oil, chemical, and power generating industries. Relatively long lengths of piping can be inspected for corrosion and cracking from a single probe position. This saves a great deal of time and money compared to using more standard point-by-point normal beam inspection procedures. Pipes can be inspected without removing insulation or tar coatings by controlling the guided wave modes and frequencies used to carry out the study. This paper will review the history and state of the art of the guided wave techniques in piping. Benefits and limitations of the various methods will be pointed out along with a vision of future directions in the area of pipe inspection.

Emat Pipe Inspection with Guided Waves

2012 ◽  
Vol 56 (5-6) ◽  
pp. 35-43 ◽  
Author(s):  
Hans-Juergen Salzburger ◽  
Frank Niese ◽  
Gerd Dobmann
Keyword(s):  
Guided Waves ◽  
Pipe Inspection

An Analysis for Effect Factors of Ultrasonic Guided Wave Tomography in Structural Health Monitoring

2011 ◽  
Vol 282-283 ◽  
pp. 574-578
Author(s):  
Hai Yan Zhang ◽  
Jian Bo Yu ◽  
Xian Hua Chen
Keyword(s):  
Guided Waves ◽  
Tomographic Reconstruction ◽  
Sampling Interval ◽  
Guided Wave ◽  
Ultrasonic Guided Waves ◽  
Quantitative Detection ◽  
Pipe Inspection ◽  
Service Lifetime ◽  
Ultrasonic Guided Wave ◽  
Wave Tomography

Localized flaws such as corrosions in petroleum pipelines often cause fragility, impairing integrity and shortening service lifetime of the structures. There has been much interest recently in monitoring the integrity of the pipe structures. Ultrasonic guided waves provide a highly efficient technique for rapid pipe inspection because they can be made to propagate significant distances in pitch-catch configurations. Crosshole tomographic geometry is formed in such pitch-catch configurations when transmits and receivers are respectively laid along two parallel circumferential belts around the pipe. Considering the pipe as an unwrapped plate, we investigate the adapation of the tomographic reconstruction in seismology to the guided wave inspection of a pipe. Various effects such as transducer arrangement, mesh precision, sampling interval and iterative algorithm on tomographic reconstruction are analyzed. The results provide a theoretical basis for quantitative detection of pipeline flaw using guided wave tomography.

Sign in / Sign up

Export Citation Format

Share Document