Machine Vision Basics Welcome Evergreen ... - Van Meter Inc.

coatiarfAI and Robotics

Oct 17, 2013 (3 years and 7 months ago)

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Machine Vision

Tools
for Gauging, Guidance & Inspection



Jeremiah Lehr

Van Meter
Inc
, Vision Specialist


Agenda


Machine Vision Basics


Brief Lighting/Filtering Techniques


Inspection Process


Tools


Patmax


Inspection


Dataman

Checker


Demo


Live inspection demos

What is Machine Vision?


Communications

Send decisions to
other devices

Part:

Good

# Bolts:


8

Lighting

Techniques to make
your part look its best

Image Acquisition

Camera taking a picture

Vision Tools

Evaluate the picture

Field of View

What you’re looking at

Vision Terms


Pixel
-
Smallest addressable part of the image


Resolution
-
Total number of pixels in the image


Field of View
-

Area the camera can see


Depth of Field
-

How much of the image is in
focus


Inspection
-
Process of running all of the vision
tools in order for a pass/fail

Depth of Field


Range over which
the image
remains in
focus


Critical
in gauging
applications


Directly
related to aperture


the smaller the
better


Inspection Process

What can machine vision do?

What Does Machine Vision Do?

Inspection

Guide/Align

Gauge/Measure

OCR/OCV

Presence/Absence

Read Bar Codes

Inspection

Completeness


Fill Level


Feature Presence


Assembly Verification


Quality


Defect Detection


Surface Inspection


Contaminants


Color


Correct Location


Orientation


Skew


Inspection

Check fill level

Check label position and
orientation

Inspection

Check correct

insertion of all rivets

Confirm orientation of
brake pads

Inspect brake assembly

PatMax
® Pattern Matching


Out of focus

180
°

Rotation

Reversed Polarity

Occlusion

Scale Change &

Dim Lighting

Confusing Background

Trained Part

PatMax

-

Overlapping Parts

Gauging/Measurement



Precise Dimensioning


Automated metrology
and

data recording


Ensure Exacting Tolerances


Diameters, gaps, bushings,
threads, etc.


What Can Vision Gauge?



Precise Dimensioning


Automated metrology and
data recording


Ensure
Exacting Tolerances


Diameters, gaps, bushings,
threads, etc.


Inspection Tools


Presence/Absence


Brightness/Contrast


PatMax

and Patterns


Pixel Count


Blob


Edge


Circle


Sharpness

Dataman

ID Readers

We can read it

Dataman

ID Readers

DataMan

500

DataMan 300

DataMan 8000

DataMan

100/200

DataMan

50/60

Vision Sensors

Cognex Checkers

Checker


Checker 4G Series


All in one sensor


Inspection


Detection


Ethernet IP


High speed


Where Does Checker Fit?


Installations where presence/absence needed


Lower cost solutions


Need more than just a
photoeye


Ethernet IP


Image storing to FTP


Colored lens filters


Own light source

Checker Applications

Detect Orientation of

Spray Nozzle

Verify 12 Cans and Caps


Verify Presence of a

Pour Spout


Verify Presence of

Bottle Cap Seal

Checker Applications

Verify Orientation of

Shampoo Cap

Verify Fill Level of Candy

Detect Upside
-
down Labels

Detect Patterns

No Registration Mark Needed!

Questions????


Thank You!