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

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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?

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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.

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BackgroundProject ScopeRequirements Mandatory Out-of-ScopeDesign Concepts Concept # 1 Concept # 2 Concept # 3Current Design Casing Handle Electronics OpticsBudgetProject PlanConclusions

Mandatory Requirements

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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:

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Questions

27Dalhousie University - Department of Mechanical Engineering