hypergun handheld hyperspectral radiometer
DESCRIPTION
HyperGun Handheld Hyperspectral Radiometer. Design Team 4 Sean Craig Hunter King Sean Roddick Hilary Sears. Outline. Project Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Current Design Budget Project Plan Conclusions. Project Background. - PowerPoint PPT PresentationTRANSCRIPT
HyperGunHandheld Hyperspectral Radiometer
Design Team 4Sean CraigHunter King
Sean RoddickHilary Sears
Outline
Dalhousie University - Department of Mechanical Engineering 2
• Project Background• Project Scope• Requirements
– Mandatory– Out-of-Scope
• Design Concepts• Current Design• Budget• Project Plan• Conclusions
Project Background• Hyperspectral Ocean-Colour
Radiometer (HyperOCR).• High-precision measurements of
water-leaving spectral radiance.• Calibrated range: 350-800 nm.• Can track environmental or ecological
changes – Water quality– Ocean acidification due to CO2
absorption– Algae blooms
Dalhousie University - Department of Mechanical Engineering 3
BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Project Background• How is a measurement taken?
Dalhousie University - Department of Mechanical Engineering 4
BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
1. Take measurement of ambient radiance2. Take measurement of water-leaving radiance3. Data stored on-board for later download
Satlantic (2010). HyperGun User Guide. Halifax, NS.
Project Scope• Advance HyperGun from prototype to
commercial product.
• Design and prototype ergonomic and robust body.
• Improve electronics and graphical display.
Dalhousie University - Department of Mechanical Engineering 5
BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Mandatory Requirements
Dalhousie University - Department of Mechanical Engineering 6
BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
• The mandatory requirements for the HyperGun are as follows:
1.0 HyperGun Body 1.1 Size L = 20.5”, W = 12.75” 1.2 Weight < 2.7 kg (5 lb) 1.3 Water Ingress
Protection IP-44
1.4 Ergonomic Conform to anthropometric data 1.5 GPS Signal
Permeability Cold Test lock in 15 min
1.6 Robust Protect electronics from free-fall impact from 1m
Mandatory Requirements
Dalhousie University - Department of Mechanical Engineering 7
BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
2.0 Graphical Display 2.1 Operating Temperature -20°C minimum
2.2 Readout of Angles Nadir, zenith, and azimuth
3.0 Internal Electronics 3.1 Power Supply 8 hr normal operation 3.2 Tilt Sensor 3-Axis, 0.1° Resolution
Out-of-Scope Requirements
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
1.0 HyperGun Body 1.1 Water Ingress Protection IP-67
1.2 Buoyancy Buoyant
2.0 Battery Pack 2.1 Ease-of-Use Tool-less access
3.0 Camera3.1 Functionality Feature camera for
imaging
Dalhousie University - Department of Mechanical Engineering
Concept # 1 Design Features• Ergonomic fore-grip• Integrated handle• Back-mounted LCD screen• Two piece construction with o-ring seal
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Dalhousie University - Department of Mechanical Engineering
Concept # 1Advantages• Fore-grip improves ergonomics.• Integrated handle allows for customization of
design.
Disadvantages• Back-mounted LCD increases size
requirements.• High upfront mold cost - $ 26,474 (ProtoLabs)• Issues in sealing around optics and graphical
display.
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Dalhousie University - Department of Mechanical Engineering
Concept # 2Key Components• Fully-articulating LCD screen.• Stock handle with rechargeable battery.• Two Piece Body with o-ring seal
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Dalhousie University - Department of Mechanical Engineering
Concept # 2Advantages• LCD can be viewed from any angle.• Side-mounted screen saves room on
body.• Rechargeable battery improvement
upon disposable.
Disadvantages• Increased cost – $ 27,740 (ProtoLabs)• Complex hinge mechanism• Battery pack adds weight.• Issue in sealing around optics
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Dalhousie University - Department of Mechanical Engineering
Concept # 3
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
• “Cheap-o-Tron”– Represents inexpensive alternative to
other concepts.– Machined body vs. Injection molding– Stock handle.
Dalhousie University - Department of Mechanical Engineering
Concept # 3
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Advantages• Inexpensive, especially in low-volume
production – $ 1,275 (ProtoLabs)
• Easy to seal using o-ring between top and bottom casing.
Disadvantages• Back-mounted LCD increases size
requirements.• Stock handle requires batteries or battery
pack to be contained in body.• Reduced aesthetics.
Dalhousie University - Department of Mechanical Engineering
Current Design• Incorporates sub-assemblies of
previous concepts.
• l = 230 mm, w = 100 mm, h = 240 mm.
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Dalhousie University - Department of Mechanical Engineering
Casing• Comprised of main body and cap.• Houses all electronics.• Sealed using two o-rings.
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Main Body Top Cap
Dalhousie University - Department of Mechanical Engineering
Handle• Handle will provide:
– Comfortable, ergonomic grip– Trigger mechanism for operation– Contain power supply
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Dalhousie University - Department of Mechanical Engineering
Handle• Three significant ergonomic factors:
– Maximum grip diameter– Maximum grip span– Hand breadth
• Anthropometrics used to accommodate range of operators
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Dalhousie University - Department of Mechanical Engineering
Handle
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
• Example of anthropometric data:
Bodyspace: Anthropometry, ergonomics and the design of work (Pheasant, 1996)
Dalhousie University - Department of Mechanical Engineering
Males FemalesHand
DimensionPercentile Percentile
5th 50th 95th 5th 50th 95th
Maximum Grip Diameter (mm) 45.0 52.0 59.0 43.0 48.0 53.0
Hand Breadth at Thumb (mm) 97.0 105.
0114.
0 84.0 92.0 99.0
Electronics• Digital display
– Nadir, zenith, and azimuth angles, GPS position.
– Increased display size.– Operating Temperature– -20°C minimum.
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Dalhousie University - Department of Mechanical Engineering
• Tilt-compensated digital compass– Must be separated from other electronics– That mesh thing
Optics• Optic array used by Satlantic in
current products.• Tight positional tolerance required.• Sensitive to moisture
– Isolated from main compartment.
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Dalhousie University - Department of Mechanical Engineering
Budget
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Item CostRapid Prototyping $ 1000.00
Graphical Display $ 200.00
Power Supply (Li-Ion) $ 50.00
Electronics(GPS and Tilt Sensor) $ 590.00
Camera $ 60.00
Miscellaneous (Hardware, o-rings, fasteners) $ 100.00
Total $ 2000.00
Dalhousie University - Department of Mechanical Engineering
Project Plan
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Objective Tentative Deadline1.0 Finalize Design Jan. 15th, 2013
1.1 Work with Satlantic to refine concept
1.2 Perform engineering analysis to determine feasibility of design
1.2 Determine dimensions of finalized design
2.0 Subsystem Integration Jan. 31st, 20132.1 Finalize design of
internal components
2.1 Select Materials2.2 Complete Drawings
3.0 Prototype Design Feb. 14th, 2013
Dalhousie University - Department of Mechanical Engineering
Project Plan
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Objective Tentative Deadline4.0 Test and refine design Feb. 21st, 20135.0 Prototype Final Design Mar. 7th, 20136.0 Procure Components Mar. 7th, 20137.0 Test Product Mar. 14th, 2013
7.1 Functionality Testing7.2 Validation of
Ergonomics
7.3 Stress Testing7.4 Water Ingress
Testing
Dalhousie University - Department of Mechanical Engineering
Conclusions
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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions
Accomplishments• Reduced weight and size in current designs.• Improved ease of use.
• Reduced production costs from earlier concept.
Future Work• Design will be reviewed and refined.• Engineering analysis on static o-ring seals.• Testing necessary to determine water
ingress protection, ergonomics, and strength of housing.
Dalhousie University - Department of Mechanical Engineering
Acknowledgements
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Satlantic LP Dr. Ronnie Van DommelenMr. Keith BrownMr. Scott Feener
Faculty Supervisor Dr. Yajun PanAdditional Advisors Dr. John Kozey
Dr. Andrew Warkentin
• Design Team 4 would like to thank the following:
Dalhousie University - Department of Mechanical Engineering
Questions
27Dalhousie University - Department of Mechanical Engineering