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Group #10January 20, 2011
Preliminary Design Review for EE495B Capstone Senior Design
Faculty Project Lead: Dr. Ralph WhaleyTeam Members: Jared Booth, Thomas Caston,
Nathan Grubb, Nate WarrenStakeholders: Dr. Whaley, Ohio University, Russ
College of Engineering and Sujit Chemburkar, Baker University Center
Energy Harvesting
Project Review
Create energy harvesting floor mat
Place floor mat in Baker Center
Harvest mechanical energy of footsteps
Store energy in rechargeable battery.
Changes Removing PIC reading display due
to time and money constraints
Project Goals
To successfully create an energy harvesting device.
Successfully store energy in an energy storing bank.
To charge an electronic device via USB output.
Safely place energy harvesting device inside Baker Center at Ohio University.
Design Content
Division of Group
Mat Design Research and design an energy harvesting
device.
Storage Device Design device to store harvested energy.
Functional Requirements
Energy Harvesting Mat Dimensions – 3’ x 3’ x ½” Max mat height of 1”
Storage Unit Box Dimensions – 10” x 10 “ x 10” Rectifier Circuitry Rechargeable Battery Pack
Mat Material Must be made of durable, non slip, and water
resistant material.
Piezoelectric Coax Cable Outside Diameter of 0.105”.
PIEZOELECTRIC MAT
Capacitor
Battery
USB
Flow Chart
Operational Requirements
Piezoelectric Coax Cable Generate electric current when
mechanical force is applied. For our purpose:
Mechanical force Electric charge Piezoelectricity has many
useful applications
Mat Design Idea
Energy Harvesting Circuitry
Group Project Hours
Hours to Date – 108 Hours Dr. Whaley and Baker Center Meetings – 48 Hours Research - 40 Hours Group Design Meetings – 20 Hours
Projected Hours – 192 to 222 Hours Dr. Whaley and Baker Center Meetings – 72 Hours Research – 40 Hours Group Design Meetings – 30 Hours Project Construction Hours – 50 to 80 Hours
Total Project Hours = 300 to 330 Hours
Updated VOC
Additional Stakeholder Sujit Chemburkar Executive Director Baker
University Center .
Change in customer demand. Mat Placement (Location & Time) Application Future use of technology
Value to The Customer
Our Method
Use piezoelectric coax cable to generate mechanical energy.
Surround the piezoelectric coax cable with a durable mat.
Have a storage device to store harvested energy.
The electricity will then be used to charge a small device using a USB port.
GANNT Chart
Project Deliverables
Prototype
Save money
Design
Analysis
Recommendations for next generation upgrades.
Final design review.
Previous Coursework
EE – 101 (Basic Circuit Analysis)
EE – 210 (Intermediate Circuit Analysis)
EE – 221 (Instrumentation Lab)
EE – 454 (Power Electronics)
EE – 490 (Power Systems)
Constraints
Money $500 Budget
Piezoelectric Materials Piezoelectric Chips
Durability and Reliability Piezoelectric Cable
Unknown Voltage Response
Deadline June 2011
Risk & Mitigation
Safety Hazard Mat will be no larger than ¾” Slip Resistant mat Bright Color
Theft Metal Security Box
Maintenance Easily relocated
Budget
Spent Thus Far $0.00
Projected Costs Piezoelectric Material - $200.00 Mat Material - $100.00 Remaining Circuitry - $200.00
Summary
What has changed. Different design options Stakeholders Location Application
Future Steps. Acquire data from piezoelectric coax cable testing. Determine mat design and circuitry through collected data. Analyze Baker Center pedestrian flow for the best possible
location of mat. Order remaining project materials. Complete project prototype.