Identifying source of acoustic emissions in structures using lam

Details Identifying source of acoustic emissions in structures using lam Identifying source of acoustic emissions in structures using lam

1995-03-15

1997-06-03

Oda, Christine K.

Measuring and testing

Vibration

By mechanical waves

73786, G01N 2914

Patent

active

056356439

ABSTRACT:
A process for global monitoring of a structure for location of a source of acoustic emissions using the vibration modes of a structure together with the repetition rate of acoustic emission events in said structure thereby allowing determination of source location of acoustic emission events in said structure is provided. Further a process for identifying the arrival of different modes of lamb waves at the same transducer distance, based on the different propagation velocities of these modes is also provided so as to determine the distance from a single transducer to the source of said lamb waves.

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Ziola et al., "Source location in that plates using cross-correlation", J. Acoust. Soc. Am., vol. 90, No. 5, pp. 2551-2556 (1991).

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