System and method for multiple mode flexible excitation in sonic infrared imaging

US7057176B2 · kind B2 · utility

Assignee

• Siemens Power Generation, Inc. · US

Inventors

• Max Rothenfusser · Munich, DE
• Joachim Baumann · Dortmund, DE
• Robert E. Shannon · Oviedo, US
• Paul J. Zombo · Cocoa, US

Key dates

• Filing date: Mar 1, 2005
• Grant date: Jun 6, 2006
• Expiry date: Mar 1, 2025

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2291/044
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A defect detection system for thermally imaging a structure that has been energized by a sound energy. The system includes a transducer that couples a sound signal into the structure, where the sound signal causes defects in the structure to heat up. In one embodiment, the sound signal has one or more frequencies that are at or near an eigen-mode of the structure.