Vision-Based Metrology - PowerPoint PPT Presentation

About This Presentation
Title:

Vision-Based Metrology

Description:

IET 405 Vision Based Metrology Project Vision-Based Metrology Bill Redman, Matt Herms, Matt Waldner, Brad Neufarth, Jason Marlar Vision-Based Metrology History Vision ... – PowerPoint PPT presentation

Number of Views:157
Avg rating:3.0/5.0
Slides: 34
Provided by: nkuEdual
Learn more at: https://www.nku.edu
Category:

less

Transcript and Presenter's Notes

Title: Vision-Based Metrology


1
Vision-Based Metrology
IET 405 Vision Based Metrology Project
Bill Redman, Matt Herms, Matt Waldner, Brad
Neufarth, Jason Marlar
2
Vision-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

3
Vision-Based Metrology History
  • Vision-Based Metrology inspection systems evolved
    from the combination of microscopes, cameras and
    optical comparators

4
Vision-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

5
Vision-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.

6
When 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.

7
Vision-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

8
Vision-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

9
Vision-Based Metrology in Automobile Wrecks
  • The deformation pattern was obtained from the
    principle vector analysis.
  • This analysis allows the representation of the
    deformation pattern.

10
Vision-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

11
Vision-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

12
ICS/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

13
PPT 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

14
Quality Inspection at Work
Polymer Membrane Note texture defects
Machined Aluminum Bar Note tool-chatter marks
Stamped Metal Package Note scratch on grinded
surface
15
Vision System Pictures
Missing Fuse
16
Golf Ball Specifications
  • Weight Less than or equal to 1.620 Ounces
  • Size Greater than or equal to 1.680 Inches
  • Shape Must be symmetrical

17
USGA 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.

18
Test Outline
  • Random sample testing for different brands of
    golf balls
  • Determine diameter
  • Analyze the results

19
Procedure
  • 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

20
Test 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

21
Final Drawing
22
Test Device
23
  • Images from National Instruments IMAQ Vision
    Builder

24
(No Transcript)
25
Images from the Vision Software
Horizontal and Vertical Clamp
Horizontal Clamp
26
(No Transcript)
27
(No Transcript)
28
(No Transcript)
29
Measurement 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

30
Conclusion
  • 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

31
http//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
32
Acknowledgements
  • 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

33
Questions?
Write a Comment
User Comments (0)
About PowerShow.com