System and method for multiple mode flexible excitation in sonic infrared imaging
AssigneeSiemens Power Generation, Inc.
InventorsMax J. Rothenfusser, Joachim F. Baumann, Robert E. Shannon, Paul J. Zombo
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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.
Claims20
A defect detection system for detecting defects in a structure, said system comprising:
- a sound source for applying a sound input signal to the structure, said input signal including a plurality of frequency signals having different frequencies, said input signal heating the defects in the structure;
- and
- a thermal imaging camera for generating thermal images of the structure to identify the defects.
A defect detection system for detecting defects in a structure, said system comprising:
- a sound source for applying a sound input signal to the structure, said input signal having one or more frequencies or a single frequency signal with an amplitude modulation selected to be at or near an eigen-mode of the structure or selected to avoid the eigen-mode of the structure, said input signal heating the defects in the structure;
- and
- a thermal imaging camera for generating thermal images of the structure to identify the defects.
A defect detection system for detecting defects in a structure, said system comprising:
- a sound source for applying a sound input signal to the structure, said input signal being a single frequency signal with an amplitude modulation, wherein the amplitude modulation provides a stepped or varying amplitude modulated signal, said input signal heating the defects in the structure;
- and
- a thermal imaging camera for generating thermal images of the structure to identify the defects.
Dependencies are inferred from the claim text.