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.