non-destructive evaluation ultrasound testing team: david drozd sean broderick rick eckert joseph...
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![Page 1: Non-Destructive Evaluation Ultrasound Testing Team: David Drozd Sean Broderick Rick Eckert Joseph Oagaro Consultant: Michael Ciocco Project Manager: Shreekanth](https://reader035.vdocument.in/reader035/viewer/2022062715/56649d6d5503460f94a4ce32/html5/thumbnails/1.jpg)
Non-Destructive Evaluation
Ultrasound Testing
Team:
David Drozd
Sean Broderick
Rick Eckert
Joseph OagaroConsultant:
Michael Ciocco
Project Manager:
Shreekanth Mandayam
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Introduction Ultrasound Applications
NDE of metals and composites Airplanes, Tanks, Sewer & Gas Pipelines
Customers Needs Internal Customer: Shreekanth Mandayam
Effective Composite Scanning to find defect geometry, depth, and location
External Customer Future Marketing to airplane and pipeline
manufacturers
Previous Work Done Ultrasound Testing of Concrete
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Objectives Learn fundamentals in ultrasound testing
and ultrasound equipment Image metal plates with known defects
and build ultrasound C-scan database Scan Kevlar composites to find evidence
of disbonding and delaminations Use Matlab for image processing to
estimate defect geometry
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Ultrasonic Inspection Project Outline
Ultrasound Basic Metal C-Scans Kevlar Composites Image Processing
Project Timescale
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Immersion Ultrasound Test Station
Ultrasound transducers Testspecimen
Immersiontank
Linearactuators forscanning
Scanner controller & stepper motors
PC fordata acquisition & processing
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Ultrasound Scanning Basics
Thru Transmission vs. Pulse Echo
A-Scan and C-Scan
TOF and Amplitude
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A-Scan and Gate Settings
Settings Detection Threshold: 40%, Gate Width: 14.46
us, Gate Start: 52.40us, Gain: 39db
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Ultrasonic Inspection Project Outline
Ultrasound Basic Metal C-Scans Kevlar Composites Image Processing
Project Timescale
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Ultrasound Imaging of Coins
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C-Scans of 5/16” Metal Plates
5/16” thick metal plate with 3mm defect
5/16” thick metal plate with 7.5 mm defect
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C-Scans of ½” Metal Plates
½” thick metal plate with 3 mm defect
½” thick metal plate with 6 mm defect
½” thick metal plate with 7.5 mm defect
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C-Scans of triangle and circle defects
3/8” thick plate with 3/16” circle
defect
3/8” thick plate with 3/16” triangle defect
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Ultrasonic Inspection Project Outline
Ultrasound Basic Metal C-Scans Kevlar Composites Image Processing
Project Timescale
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Kevlar Kevlar Composites Company located in Canada There are 2 types of Kevlar:
Pretreated Kevlar Non-Pretreated Kevlar
Delamination
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Kevlar
First Scans of Kevlar
Each scan 1’x1’Starting from The right corner
Non-Pretreated Kevlar
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KevlarNon-Pretreated Kevlar
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KevlarPretreated Kevlar
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Ultrasonic Inspection
Project Outline Ultrasound Basic Metal C-Scans Kevlar Composites Image Processing
Project Timescale
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Image Processing Objective
Determine Geometry of Defects From Experimental C-Scan Images
Use Fourier Descriptors to apply to arbitrary defect geometries
Approach: Use basic image processing techniques
to estimate image shape and size
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Image Processing Approach
Metal Specimen
C-Scan
Adjusted Image
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Experimental Data
Original C-Scan
Histogram Balancing
Image Smoothing
Image Defect Geometry:
Actual Experimental
Length = 1 in. Length = 0.85 in.
Width = 0.5 in. Width = 0.43 in.
Metal Specimen
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Image Processing Techniques
Random Defect Geometries Determine Fourier Descriptors of perimeter of
any arbitrary shape Insensitive to:
Translation Rotation Scale Changes
How to model? Develop basic shape images and process
Circle, Rectangle, Triangle, Ellipse, etc.
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Project Timescale
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Future Planning Continue Scanning
Build Database Metal, Kevlar, Coins, etc.
Model Random Defect Geometries Continue Processing Research Research Paper / Competition
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Ultrasonic Inspection
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