Patent ID: 6360608
Filing Date: 2002-03-26
Classification: G01H,G01N,G10K

Abstract:
A system for substantially eliminating extraneous noise sources from the data produced during acoustic emission testing of a structure comprising:a transducer coupled with said structure and configured to sense acoustic emission signal in said structure, said transducer being substantially equally sensitive to in-plane and out-of-plane acoustic emission signals; a splitter which receives said signal from said transducer and divides said signal into a high-frequency signal and a low-frequency signal; and a circuit coupled to said splitter, said circuit generating a high-frequency peak amplitude and a low-frequency peak amplitude from said high-frequency and low-frequency signals; and a computer coupled to said circuit, said computer (i) computing the ratio of said high-frequency peak amplitude and said low-frequency peak amplitude; and (ii) accepting ratios indicative of crack growth and rejecting ratios indicative of extraneous noise.