P08456-LED Lighting for an Underwater ROV
description
Transcript of P08456-LED Lighting for an Underwater ROV
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