P08456-LED Lighting for an Underwater ROV

Jeremy Schiele-Project ManagerJonathan Lent-Mechanical Engineer

Ryan Seeber-Computer EngineerJustin VanSlyke-Mechanical Engineer

Benoit Hennekinne-Electrical Engineer

Sponsored by:

P08456-Project Description End Users: Underwater ROVs and RIT’s

robotic platforms (RP-1, 10, 100) Waterproof light for underwater exploration Top Level Requirements (eng. Specs):

Waterproof design (min. 400 ft depth) High light output (min 250 lm @ 5 Watts) Low power consumption (max. 10 Watts) Controllable from remote surface unit Modular housing design must be able to house

thruster’s motor unit as well

P08456-Light Unit Concept

Watertight bulkhead electrical connector

Corrosion resistant aluminum housing

Two LED colors available Light unit controllable

from surface Two mounting systems

available

P08456-Thruster Housing Concept

Utilizes the same rear portion as LED light unit, bulkhead connector, and PCB assembly

P08456-Mounting System Concept

Two mounting systems to meet specific requirements for each housing application

Light = Adjustability

Thruster = Rigidity

P08456-Functional Flowchart

Convert batterypower into

required voltage

Provide LEDsw/ correct amt.

of powerLight

Heat

Temp.Data

ProcessInput

Send PWMto LED driver

BatteryPower

UserInput

Receive datafrom Temp.

sensor

P08456-Summary of Design Review

Continue to meet with customer to fine tune housing design

Breadboard of electrical components is next step for verification

P08456-High Risk Areas Risk: Pressure & Sealing

Requirements Operation pressure: 216

psi (500 ft) All leak-points need to

be verified and secured

Mitigation: FEA analysis of housing

design Pressure chamber

testing of prototype at Hydroacoustics Inc.

Risk: Heat Dissipation LED board produces up

to 10 watts of heat Can cause premature

failure for LEDs and damage other electronics

Mitigation: Thermal resistance

analysis of LED board Separate LEDs from

other electrical components

LED board will have extra thick copper traces to evacuate heat

P08456-Product Development Phase

MSD I MSD II

0 1 2 3 4

Current Phase of Development

Final Production

Units

Phase 0: Planning

Phase 1: Concept Development

Phase 2: System Level Design

Phase 3: Detailed Design

Phase 4: Testing & Refinement

P08456-Current State of DesignSpec.

NumberCustomer Need No.

Design SpecificationImportance

(1 < 5)Unit of Measure Marginal Value Ideal Value Final Design Value

1 3 Low wattage LED system 5 watts/ fixture 10 5 3.30 @ 350 mA (12 max)2 3 Low heat generation from LEDs 5 watts/ fixture 2.8 1 2.41 @ 350mA (7.65 max)3 1, 2 Luminous flux 5 lumen/ fixture 250 350 300 @ 350 mA (675 max)4 2 Multi-spectrum light 3 NA White + 1 color White + 2 colors White + 1 color5 5, 6 Enclosure size 4 in x in x in 3x3x6 2x2x4 2.75 dia x 4.56 6, 7 Assembly/Disassembly mount 3 sec 90 60 TBD7 8 MicroController voltage 4 volts 5 3.3 58 8 Board Voltage 4 volts 5 3.3 59 8 LED Voltage Power 4 volts 24 7.6 24 (driver) 3.15 (LED)10 1 LED Current 5 amp 1 0.7 111 10 Submergable (water tight seals) 5 ft 400 500 500 est.12 10 Pressure resistant 5 psi 170 216 216 est. 13 4 Preservation of open architecture 4 y/n y y y14 9 Preservation of open source system 4 y/n y y y

15 8Lights & thrusters contolled by 1 software package 5 y/n y y TBD

Current design meets all specs possible at this point in development

P08456-Current Budget Cost / LED light unit: $380.87 Cost / thruster housing unit: $323.69 Development & bread board: $200.00 Prototype Unit: $150.00

Total Light Unit Budget: $1873.48

Product provided to P08454: $1295.00

P08456-MSDII Schedule Milestones

12/7 Machine Drawings finalized for CNC 12/12 All off-the-shelf parts ordered by 12/14 Housing prototypes made 1/13 Pressure, light, and PCB testing

complete 2/18 Documentation complete (EDGE, tech

paper, poster) 2/20 Production of 8 units completed 2/22 Final Project Review