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 Dalhousie University - Department of Mechanical Engineering 2

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics 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 CO 2 absorption – Algae blooms Dalhousie University - Department of Mechanical Engineering 3

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Project Background

• How is a measurement taken?

1. Take measurement of ambient radiance 2. Take measurement of water-leaving radiance 3. Data stored on-board for later download Satlantic (2010). HyperGun User Guide. Halifax, NS.

Dalhousie University - Department of Mechanical Engineering 4

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

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

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Mandatory Requirements

• The mandatory requirements for the HyperGun are as follows:

1.0 HyperGun Body

1.1 Size 1.2 Weight 1.3 Water Ingress Protection 1.4 Ergonomic 1.5 GPS Signal Permeability 1.6 Robust L = 20.5”, W = 12.75” < 2.7 kg (5 lb) IP-44 Conform to anthropometric data Cold Test lock in 15 min Protect electronics from free-fall impact from 1m Dalhousie University - Department of Mechanical Engineering 6

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Mandatory Requirements

2.0 Graphical Display

2.1 Operating Temperature 2.2 Readout of Angles -20 °C minimum Nadir, zenith, and azimuth

3.0 Internal Electronics

3.1 Power Supply 3.2 Tilt Sensor 8 hr normal operation 3-Axis, 0.1

° Resolution Dalhousie University - Department of Mechanical Engineering 7

Out-of-Scope Requirements

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

1.0 HyperGun Body

1.1 Water Ingress Protection 1.2 Buoyancy

2.0 Battery Pack

2.1 Ease-of-Use

3.0 Camera

3.1 Functionality IP-67 Buoyant Tool-less access Feature camera for imaging Dalhousie University - Department of Mechanical Engineering 8

Concept

#

1

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Design Features

• Ergonomic fore-grip • Integrated handle • Back-mounted LCD screen • Two piece construction with o-ring seal Dalhousie University - Department of Mechanical Engineering 9

Concept

#

1

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Advantages

• 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.

Dalhousie University - Department of Mechanical Engineering 10

Concept

#

2

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Key Components

• Fully-articulating LCD screen.

• Stock handle with rechargeable battery.

• Two Piece Body with o-ring seal Dalhousie University - Department of Mechanical Engineering 11

Concept

#

2

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Advantages

• 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 Dalhousie University - Department of Mechanical Engineering 12

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Concept

#

3

• “Cheap-o-Tron” – – – Represents inexpensive alternative to other concepts.

Machined body vs. Injection molding Stock handle.

Dalhousie University - Department of Mechanical Engineering 13

Concept

#

3

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

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 14

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Current Design

• Incorporates sub-assemblies of previous concepts.

• l = 230 mm, w = 100 mm, h = 240 mm.

Dalhousie University - Department of Mechanical Engineering 15

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Casing

• Comprised of main body and cap.

• Houses all electronics.

• Sealed using two o-rings.

Main Body Top Cap Dalhousie University - Department of Mechanical Engineering 16

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Handle

• Handle will provide: – – – Comfortable, ergonomic grip Trigger mechanism for operation Contain power supply Dalhousie University - Department of Mechanical Engineering 17

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Handle

• Three significant ergonomic factors: – – – Maximum grip diameter Maximum grip span Hand breadth • Anthropometrics used to accommodate range of operators Dalhousie University - Department of Mechanical Engineering 18

Handle

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions • Example of anthropometric data:

Hand Dimension Males 5 th Percentile 50 th 95 th Maximum Grip Diameter (mm)

45.0

52.0

59.0

5 th

43.0

Hand Breadth at Thumb (mm)

97.0 105.0 114.0 84.0

Females Percentile 50 th 95 th

48.0

92.0

53.0

99.0

Bodyspace: Anthropometry, ergonomics and the design of work (Pheasant, 1996) Dalhousie University - Department of Mechanical Engineering 19

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Electronics

• Digital display – Nadir, zenith, and azimuth angles, GPS position.

– Increased display size.

– Operating Temperature – -20 °C minimum.

• Tilt-compensated digital compass – Must be separated from other electronics – That mesh thing Dalhousie University - Department of Mechanical Engineering 20

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Optics

• Optic array used by Satlantic in current products.

• Tight positional tolerance required.

• Sensitive to moisture – Isolated from main compartment.

Dalhousie University - Department of Mechanical Engineering 21

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Budget

Item

Rapid Prototyping

Cost

$ 1000.00

Graphical Display Power Supply (Li-Ion) Electronics (GPS and Tilt Sensor) Camera Miscellaneous (Hardware, o-rings, fasteners)

Total

$ 200.00

$ 50.00

$ 590.00

$ 60.00

$ 100.00

$ 2000.00

Dalhousie University - Department of Mechanical Engineering 22

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Project Plan

Objective 1.0 Finalize Design

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

2.1 Finalize design of internal components 2.1 Select Materials 2.2 Complete Drawings

3.0 Prototype Design Tentative Deadline

Jan. 15 th , 2013 Jan. 31 st , 2013 Feb. 14 th , 2013 Dalhousie University - Department of Mechanical Engineering 23

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

Project Plan

Objective 4.0 Test and refine design 5.0 Prototype Final Design 6.0 Procure Components 7.0 Test Product

7.1 Functionality Testing 7.2 Validation of Ergonomics 7.3 Stress Testing 7.4 Water Ingress Testing

Tentative Deadline

Feb. 21 st , 2013 Mar. 7 th , 2013 Mar. 7 th , 2013 Mar. 14 th , 2013 Dalhousie University - Department of Mechanical Engineering 24

Conclusions

Background Project Scope Requirements Mandatory Out-of-Scope Design Concepts Concept # 1 Concept # 2 Concept # 3 Current Design Casing Handle Electronics Optics Budget Project Plan Conclusions

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 25

Acknowledgements

• Design Team 4 would like to thank the following:

Satlantic LP Faculty Supervisor Additional Advisors

Dr. Ronnie Van Dommelen Mr. Keith Brown Mr. Scott Feener Dr. Yajun Pan Dr. John Kozey Dr. Andrew Warkentin Dalhousie University - Department of Mechanical Engineering 26

Questions

Dalhousie University - Department of Mechanical Engineering 27