Measuring and testing – Vibration – By mechanical waves
Patent
1995-04-03
1996-09-10
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
73620, 73625, G01N 2904, G01N 2906
Patent
active
055548083
ABSTRACT:
The present invention discloses a system and a method for ultrasonically detecting ply wrinkling in a laminated composite. The composite is ultrasonically scanned with sound wave energy generated from transducer(s) operating in an oblique incidence pulse echo mode. Echo signals reflected from the plies of the composite are then detected with the transducer(s). Each set of reflected echo signals represents a three-dimensional waveform data set u(x,y,t) having spatial dimensions (x,y) and a temporal dimension (t) mapping directly to a third spatial dimension (z) orthogonal to the surface of the composite. The three dimensional waveform data set u (x,y,t) corresponds to a three-dimensional volumetric region in the composite. The three-dimensional waveform data set u(x,y,t) is then processed into a rectified data set w(x,y,t). Ply noise in the three-dimensional data set w(x,y,t) is then filtered. The filtered three-dimensional data set is then converted into wrinkle severity C-scan and a wrinkle depth C-scan. Subsurface wrinkling in the composite is then detected and measured from the wrinkle severity C-scan and the wrinkle depth C-scan.
REFERENCES:
patent: 4457174 (1984-07-01), Bar-Cohen et al.
patent: 4545250 (1985-10-01), Miwa
patent: 4567764 (1986-02-01), Jamison et al.
patent: 4723553 (1988-02-01), Miwa et al.
patent: 4947351 (1990-08-01), Moran et al.
"Sensing Strategy to Detect Wrinkles in Components" by Pereira, et al, IEEE Transactions on Instrumentation and Measurement, vol. 43, No. 3, Jun. 1994 .
Ashraf Nashimiya
General Electric Company
Goldman David C.
Snyder Marvin
Williams Hezron E.
LandOfFree
System and method for detecting ply wrinkling in a laminated com does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for detecting ply wrinkling in a laminated com, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for detecting ply wrinkling in a laminated com will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1322253