Title: Vision-Based Metrology
1Vision-Based Metrology
IET 405 Vision Based Metrology Project
Bill Redman, Matt Herms, Matt Waldner, Brad
Neufarth, Jason Marlar
2Vision-Based Metrology History
- Vision-Based Metrology refers to the technology
using optical sensors and digital image
processing hardware and software to - Identify
- Guide
- Inspect
- Measure objects
3Vision-Based Metrology History
- Vision-Based Metrology inspection systems evolved
from the combination of microscopes, cameras and
optical comparators
4Vision-Based Metrology History
- Vision-Based Metrology is extensively used in
general industrial applications such as the
manufacturing of - Electronics
- Automotive
- Aerospace
- Pharmaceutical
- Consumer products
- Vision-Based Metrology is being utilized in the
automatic identification and data collection
market as a complementary or alternative
technology to traditional laser scanning devices
for reading bar codes
5Vision-Based Metrology History
- Early systems were integrated into packaging
lines for optical character recognition and
proved to be a reliable way to check the accuracy
of product codes and label information. - Today, high-resolution cameras, advances in
software and imaging processors, and the
availability of powerful, inexpensive compact
computers have made vision systems faster and
more reliable than ever.
6When does a company need a vision system?
- Some products require 100-percent product
inspection with documented inspection results. - In other cases a vision system may be needed for
high production product inspection - Vision systems provide a means of increasing
yield-that is, the ratio of good parts to bad
parts. - When a serial defect is spotted, the system not
only recognizes it but can stop the conveyor and
inform the operator of the defect and its
magnitude. - The yield factor is particularly important in
manufacturing industries that produce large
volumes, as in the compact disc and
pharmaceutical industries.
7Vision-Based Metrology inAutomobile Wrecks
- Vision Based Metrology is now being used to focus
on the movement of objects along with their
deformation - This is being used in many car wreck
investigations
8Vision-Based Metrology in Automobile Wrecks
- Two consecutive images were grabbed from a high
speed video sequence - A displacement field of a car at a certain moment
is presented
9Vision-Based Metrology in Automobile Wrecks
- The deformation pattern was obtained from the
principle vector analysis. - This analysis allows the representation of the
deformation pattern.
10Vision-Based Metrology in Weather Patterns
- Vision-Based Metrology has also been used to
study weather patterns - Flow information from a tornado is able to be
extracted for scientists to attempt to learn more
about them
11Vision-Based Metrology in Companies
- There are many companies that use vision
inspected systems today - Some of the bigger ones are ICS/INEX and PPT
Vision
12ICS/INEX
- INEX can be traced all the way back to the early
1900s when they developed a system called
OPTI-Tron which inspected bottle beverages - The OPTI-Tron system would eventually become the
OPTISCAN bottle inspector a worldwide standard
in container inspection with thousands of units
installed. - The introduction of the company's SuperInspector
1055 became the first commercial machine
inspection system to integrate camera and
computer technologies
13PPT Vision
- Founded in 1982, PPT specializes in industrial
applications where accuracy, repeatability, high
speed and flexibility are important requirements.
- They are the world leader in the design and
manufacture of completely digital 2D machine
vision systems. - PPT's 2D machine vision product line is sold on a
global basis to end-users, system integrators,
and OEM's - PPT is involved primarily in
- Electronics
- Semiconductor components
- Automotive
- Medical devices
- Pharmaceutical and packaged goods
14Quality Inspection at Work
Polymer Membrane Note texture defects
Machined Aluminum Bar Note tool-chatter marks
Stamped Metal Package Note scratch on grinded
surface
15Vision System Pictures
Missing Fuse
16Golf Ball Specifications
- Weight Less than or equal to 1.620 Ounces
- Size Greater than or equal to 1.680 Inches
- Shape Must be symmetrical
17USGA Golf Ball Testing
- A ball passes USGA size inspection if it falls,
under its own weight, through a 1.680 inch
diameter ring gauge fewer than 25/100 times in
randomly selected positions. - Temperature is constant at 23 C (73.4 F).
- Humidity is held constant.
18Test Outline
- Random sample testing for different brands of
golf balls - Determine diameter
- Analyze the results
19Procedure
- Place the ball on the test stand
- Take a picture from a standard height for each
golf ball being tested - Analyze the image using National Instruments
vision analysis software - Compare the image to the standard size for the
USGA ball specification - Compile and analyze the data from the testing
- Present information in graphical form
20Test Device
- Designed using Solidworks CAD program
- Made of extruded aluminum
- Center positioned ball holder that provides
consistent images for each ball tested - Camera is secured using the tripod mount
21Final Drawing
22Test Device
23- Images from National Instruments IMAQ Vision
Builder
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25Images from the Vision Software
Horizontal and Vertical Clamp
Horizontal Clamp
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29Measurement Data
- Able to see variance between different golf balls
- Tolerance we detected was about 1.680 .010
inches - The device performed as expected to allow us to
complete the vision analysis
30Conclusion
- Vision systems are a reliable way to accurately
measure items - A vision system can measure minute details to a
precise and accurate level - We were able to observe this with golf balls
varying just a few pixels - We now have a better understanding of vision
systems and how they work
31http//www.cranfield.ac.uk/sme/amac/research/metro
logy/tornado.htmhttp//www.cranfield.ac.uk/sme/am
ac/research/metrology/carcrush.htmhttp//www.qual
itydigest.com/mar98/html/vision.html
http//www.rvsi.com/Pages/about.htmhttp//www.in
exvision.comhttp//www.pptvision.comhttp//www.v
isionxinc.com
References
32Acknowledgements
- Alufab located in Mt. Carmel, Ohio
- Donated materials for the prototype
- Donated their shop and tools for the
construction - Special thanks to Dr. Allameh for allowing us to
use his software and office for this project
33Questions?