A new long-range guided wave testing (GWT) technology for pipe inspection has been developed that synthesizes the advantages of both traditional piezoelectric and magnetostrictive GWT technology. This new multichannel magnetostrictive sensor technology combines a high signal-to-noise ratio created using magnetostrictive technology with the superior circumferential resolution and energy focusing capabilities of standard piezoelectric GWT tools. The technique is particularly suited to structural health monitoring (SHM) situations where sensors or sensor components are permanently bonded in place. The result is an extremely low-profile, 1.27 mm (0.05 in.) phased array transducer collar that utilizes distributed surface loading, as opposed to small localized loading, to practically eliminate the near field seen with traditional GWT collars. The near field is associated with the distance required to fully develop the ultrasonic beam to its desired form. This new technology will have a direct impact in the nuclear, fossil, oil and gas, and gas transmission industries. This paper discusses the basic concept, an example result and the benefits of the new multichannel magnetostrictive sensor design.
|Original language||English (US)|
|Number of pages||5|
|State||Published - Jan 1 2013|
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering