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Aircraft Carrier Draft
MeasurementShip Draft Team - Fall 2015
Project Overview
Introduction
• Newport News Shipbuilding partnered with Old Dominion University to develop a draft measuring system for use on naval aircraft carriers and submarines • Guidelines
• Economical • Reduction of risk to personnel • Non-permanent mounting
Summer Overview
• The summer team performed a detailed comparison of non-contacting ultrasonic range finders versus laser range finders • The team determined that ultrasonic
systems were superior for measuring distance from a liquid surface
Sonar Overview
Ultrasonic (Principles)
• The ultrasonic range sensor sends a high frequency sound wave toward the water surface. The wave is then reflected back to the sensor.
• The distance from the sensor to the water surface is calculated based on the time of flight of the sound wave.
Fall Team Collaboration
Electronics System
Electronics System
• Researched hardware that met the requirements of the project• Arduino micro processor development board• Arduino compatible ultrasonic range sensor• Arduino compatible temperature sensor• Arduino compatible Bluetooth module
Current Electrical Work
• Researching software for each component • Testing each component for functionality
with code • Making necessary adjustments
• Integrating components into full system
Current Electrical Work
Future Electrical Work
• Develop reliable Bluetooth transmittance from module to pc • Develop human interface signal-light
code• Calibrate instrumentation • Perform full system testing
Current User Interface Work
• Develop Graphic User Interface (GUI) using ‘LabVIEW’• Finalize layout of interface
• LED on/off• Draft • Temperature • Humidity
• Develop communication between Arduino processor and LabVIEW
Future User Interface Work
• Convert signal output to integrate Bluetooth wireless system • Present functional interface to shipyard
liaison for user feedback
Testing Hardware
Current Work
• Ultrasonic sensor requires a clearance of 30 cm, so a small test tank would not suffice
• Designed floating test structure in SolidWorks• “Styrofoam pontoon”• Shipyard liaison
recommended redesign for mountable test structure
Future Work
• Modify existing test rig created by the summer team• Conduct initial testing using pre-existing
tank • Perform data collection and calibration on
sensor readings
Hull Attachment and Housing
Current Work
• Created a 3D design of magnetic self-leveling hull attachment mounting system using Autodesk Inventor • Rapidly prototyped the mounting system
using the MakerBot Z18 3D printer• Created a 3D design of the sensor
enclosure • Implemented elements to weatherproof the
enclosure
Assembly
Future Work
• Optimize the design of the hull attachment mounting system and sensor enclosure using finite element analysis
• Strength • Cost • Production time • Functionality
Project Materials Budget
Budget
• Received $300 start up money from the Department of Mechanical Engineering • Submitted undergraduate funding
proposal of $1000• Current expenses : $236
Gantt Chart
Gantt Chart (Task Assignments)
Gantt Chart (Completion Status)
Acknowledgements • Faculty advisor
• Dr. Miltiadis Kotinis • Shipyard Liaison
• Butch Brenton – Manager Engineering 3, Networks, Communication, and Automation
• Department of Mechanical and Aerospace Eng.• David Mooney – Team Manager • Sam Harpin • David Mann• Philip Stickle• Devin Samples-Wright• Thomas Wheeless
• Department of Electrical and Computer Eng.• Ashley Smith
• Department of Engineering Tech. • Ashley Wilson – EET
Questions