Pipe testing with ultrasonic guided wave synthetic focusing techniques

Jing Mu, Li Zhang, Jia Hua, Joseph L. Rose

Research output: Contribution to specialist publicationArticle

3 Scopus citations

Abstract

Ultrasonic guided waves are routinely incorporated by industries for pipeline testing. Both guided wave energy tuning upon excitation and signal interpretation upon reception are important for discontinuity detection in pipes. Active phased array systems for long-range pipe inspection are available. Choosing active phased array or synthetic focusing is often necessary for improved testing speed, as well as overall penetration power. In this paper, two synthetic focusing techniques were utilized for discontinuity detection in a pipe. One synthetic focusing technique used time delays, while the other technique utilized a mode extraction and backpropagation scheme. Synthetic focusing techniques use either axisymmetric loading or partial loadings to generate guided waves and receive the waves by individual segments. Synthetic focusing is achieved by data analysis of the received signals, so it is faster to carry out a total focal scan for a pipeline by employing a synthetic focusing technique than by using the active focusing technique. This study shows that the time delay synthetic focusing technique yielded more accurate results for discontinuity detection and localization in a 101.6 mm steel pipe with four channels, while the back-propagation technique gave better discontinuity imaging results of a 203.2 mm steel pipe with eight channels. Both methods are useful.

Original languageEnglish (US)
Pages1171-1176
Number of pages6
Volume68
No10
Specialist publicationMaterials Evaluation
StatePublished - Oct 1 2010

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Pipe testing with ultrasonic guided wave synthetic focusing techniques'. Together they form a unique fingerprint.

  • Cite this

    Mu, J., Zhang, L., Hua, J., & Rose, J. L. (2010). Pipe testing with ultrasonic guided wave synthetic focusing techniques. Materials Evaluation, 68(10), 1171-1176.