ncda: pickle sorter concept review
DESCRIPTION
NCDA: Pickle Sorter Concept Review. Project 98.09 Sponsored by Ed Kee of Keeman Produce, Lincoln, DE. Overview. Introduction to the Problem Method Wants Metrics System and Functional Benchmarking Concept Generation Concept Selection Schedule Budget. Background. - PowerPoint PPT PresentationTRANSCRIPT
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NCDA: Pickle Sorter NCDA: Pickle Sorter Concept ReviewConcept Review
Project 98.09Project 98.09Sponsored by Ed Kee ofSponsored by Ed Kee of
Keeman Produce, Lincoln, DEKeeman Produce, Lincoln, DE
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OverviewOverview
• Introduction to the Problem• Method
– Wants Metrics– System and Functional Benchmarking– Concept Generation – Concept Selection
• Schedule• Budget
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BackgroundBackground
• Title: Pickle Sorter • Sponsor: Ed Kee of Keeman Produce• Problem: The cucumber pickling industry
currently separates out undesirable pickles by hand. Mr. Kee would like a device to efficiently and reliably separate the usable cucumbers from the unusable ones.
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Plant SchematicPlant Schematic
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StrategyStrategy
• Mission: To provide an integrated, automated system to sort out undesirable pickles on the processing line.
• Approach: Collect customer wants and develop them into metrics which can be used to evaluate benchmarks and concepts, leading to a final design solution.
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Customer WantsCustomer Wants
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Customer Wants (Customer Wants (cont’d)cont’d)
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Wants Wants Metrics Metrics
Quality Metrics Cost Effectiveness Working Area Speed Reliability Portability Adaptability SimplicityPrice a d d d d d d dPickles/ minute d c d a d d a c% bad removed d a d d d d b c% good removed d a d d d d b cmean time to failure d d d d a d c cWidth d d a d d b b dLength d d a d d b b dWeight d d d d d a b c
abcd
Denotes Very Strong CorrelationDenotes Strong CorrelationDenotes Weak CorrelationDenotes No Correlation
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BenchmarkingBenchmarking
• Patents, Internet and Trade Journals• System:
– Integrated production line identification and sorting• Function:
– Material handling equipment and identification– System consists of three main functions: alignment,
identification and removal.
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System BenchmarksSystem Benchmarks
•Machine Vision common to all System Benchmarks•Typical Sorting Parameters
- Color, Size(length), Surface Features
•Best Practices
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Functional BenchmarksFunctional Benchmarks
Alignment • Common Material Handling Task• Best Practices: lane dividers, overhead rollers
Removal• Wide Range of Possible Methods• Best Practices: air jet, piston, robotic arm, trapdoor
Identification *Critical System Function• Best Practice: Machine Vision was the only geometric identification system found in use
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Alignment
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Sorting
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Target ValuesTarget Values
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Concept GenerationConcept Generation
Benchmarking• Functions Which Satisfy Target Values• Best Practices• Produce Handling Applications
Brainstorming • Mechanical Solutions for Identification• Use of Physical Properties for Self-Separation
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Concepts
Alignment1 Lane Dividers
2 Rollers
3 Chains
4 Compartments
Identification1 Imaging
2 Pins
3 Calipers
4 Rolling
Removal1 Air Jet
2 Piston
3 Trapdoor
4 Tilting Tray
5 Robot Arm
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Concepts (cont’d)
Piezoelectric Pins– Displacement of pins in field creates 3-D surface image
Calipers– Difference in caliper displacement provides degree of curvature
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Imaging Process
• Hardware: – Digital Video Camera– Frame-Grabber– Data Acquisition
Board– Low Cost PC
• Software: – Image processing
utilities– Specialized Grading
software– GUI for operator
control over selection parameters
• Input/Output controlled by microcomputer
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Imaging Algorithms
• Image as camera would receive it:
• Processing includes:– Histogram analysis– Threshold selection– Application of an edge
or range detection algorithm
– Deterministic process
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Image Flattening
• Thresholded Image:• Proper threshold level
is determined by Histogram analysis
• A good threshold level may change slightly from batch to batch, but not often within a batch of pickles.
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Edge Detection Algorithms
• Ex: Canny Algorithm • Ex: Zero Crossings
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Edge Detection Algorithms
• Ex: Gradient Magnitude • Ex: Edge Tracking
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Complete Model
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Progress To DateProgress To Date
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Critical Tasks in SpringCritical Tasks in Spring
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Estimated Hours
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Estimated CostsEstimated Costs
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Closing Points
• Problem Statement• Concept Selection Justification:
– Alignment: Overhead Rollers– Identification: Computer Controlled Imaging– Removal: Air Propulsion
• Physical Demonstration of Model.