Group #10 January 20, 2011 Preliminary Design Review for EE495B Capstone Senior Design Faculty Project Lead: Dr. Ralph Whaley Team Members: Jared Booth, Thomas Caston, Nathan Grubb, Nate Warren Stakeholders: Dr. Whaley, Ohio University, Russ College of Engineering and Sujit Chemburkar, Baker University Center

Project Review Create energy harvesting floor mat Create energy harvesting floor mat Place floor mat in Baker Center Place floor mat in Baker Center Harvest mechanical energy of footsteps Harvest mechanical energy of footsteps Store energy in rechargeable battery. Store energy in rechargeable battery. Changes Changes Removing PIC reading display due to time and money constraints Removing PIC reading display due to time and money constraints

Project Goals To successfully create an energy harvesting device. To successfully create an energy harvesting device. Successfully store energy in an energy storing bank. Successfully store energy in an energy storing bank. To charge an electronic device via USB output. To charge an electronic device via USB output. Safely place energy harvesting device inside Baker Center at Ohio University. Safely place energy harvesting device inside Baker Center at Ohio University.

Design Content Division of Group Division of Group Mat Design Mat Design Research and design an energy harvesting device. Research and design an energy harvesting device. Storage Device Storage Device Design device to store harvested energy. Design device to store harvested energy.

Functional Requirements Energy Harvesting Mat Dimensions – 3 x 3 x ½ Energy Harvesting Mat Dimensions – 3 x 3 x ½ Max mat height of 1 Max mat height of 1 Storage Unit Box Dimensions – 10 x 10 x 10 Storage Unit Box Dimensions – 10 x 10 x 10 Rectifier Circuitry Rectifier Circuitry Rechargeable Battery Pack Rechargeable Battery Pack Mat Material Mat Material Must be made of durable, non slip, and water resistant material. Must be made of durable, non slip, and water resistant material. Piezoelectric Coax Cable Piezoelectric Coax Cable Outside Diameter of Outside Diameter of

PIEZOELECTRIC MAT Capacitor Battery USB Flow Chart

Operational Requirements Piezoelectric Coax Cable Piezoelectric Coax Cable Generate electric current when mechanical force is applied. Generate electric current when mechanical force is applied. For our purpose: For our purpose: Mechanical force Electric charge Mechanical force Electric charge Piezoelectricity has many useful applications Piezoelectricity has many useful applications

Mat Design Idea

Energy Harvesting Circuitry

Group Project Hours Hours to Date – 108 Hours Hours to Date – 108 Hours Dr. Whaley and Baker Center Meetings – 48 Hours Dr. Whaley and Baker Center Meetings – 48 Hours Research - 40 Hours Research - 40 Hours Group Design Meetings – 20 Hours Group Design Meetings – 20 Hours Projected Hours – 192 to 222 Hours Projected Hours – 192 to 222 Hours Dr. Whaley and Baker Center Meetings – 72 Hours Dr. Whaley and Baker Center Meetings – 72 Hours Research – 40 Hours Research – 40 Hours Group Design Meetings – 30 Hours Group Design Meetings – 30 Hours Project Construction Hours – 50 to 80 Hours Project Construction Hours – 50 to 80 Hours Total Project Hours = 300 to 330 Hours Total Project Hours = 300 to 330 Hours

Updated VOC Additional Stakeholder Additional Stakeholder Sujit Chemburkar Executive Director Baker University Center. Sujit Chemburkar Executive Director Baker University Center. Change in customer demand. Change in customer demand. Mat Placement (Location & Time) Mat Placement (Location & Time) Application Application Future use of technology Future use of technology

Value to The Customer

Our Method Use piezoelectric coax cable to generate mechanical energy. Use piezoelectric coax cable to generate mechanical energy. Surround the piezoelectric coax cable with a durable mat. Surround the piezoelectric coax cable with a durable mat. Have a storage device to store harvested energy. Have a storage device to store harvested energy. The electricity will then be used to charge a small device using a USB port. The electricity will then be used to charge a small device using a USB port.

GANNT Chart

Project Deliverables Prototype Prototype Save money Save money Design Design Analysis Analysis Recommendations for next generation upgrades. Recommendations for next generation upgrades. Final design review. Final design review.

Previous Coursework EE – 101 (Basic Circuit Analysis) EE – 101 (Basic Circuit Analysis) EE – 210 (Intermediate Circuit Analysis) EE – 210 (Intermediate Circuit Analysis) EE – 221 (Instrumentation Lab) EE – 221 (Instrumentation Lab) EE – 454 (Power Electronics) EE – 454 (Power Electronics) EE – 490 (Power Systems) EE – 490 (Power Systems)

Constraints Money Money $500 Budget $500 Budget Piezoelectric Materials Piezoelectric Materials Piezoelectric Chips Piezoelectric Chips Durability and Reliability Durability and Reliability Piezoelectric Cable Piezoelectric Cable Unknown Voltage Response Unknown Voltage Response Deadline Deadline June 2011 June 2011

Risk & Mitigation Safety Hazard Safety Hazard Mat will be no larger than ¾ Mat will be no larger than ¾ Slip Resistant mat Slip Resistant mat Bright Color Bright Color Theft Theft Metal Security Box Metal Security Box Maintenance Maintenance Easily relocated Easily relocated

Budget Spent Thus Far Spent Thus Far $0.00 $0.00 Projected Costs Projected Costs Piezoelectric Material - $ Piezoelectric Material - $ Mat Material - $ Mat Material - $ Remaining Circuitry - $ Remaining Circuitry - $200.00

Summary What has changed. What has changed. Different design options Different design options Stakeholders Stakeholders Location Location Application Application Future Steps. Future Steps. Acquire data from piezoelectric coax cable testing. Acquire data from piezoelectric coax cable testing. Determine mat design and circuitry through collected data. Determine mat design and circuitry through collected data. Analyze Baker Center pedestrian flow for the best possible location of mat. Analyze Baker Center pedestrian flow for the best possible location of mat. Order remaining project materials. Order remaining project materials. Complete project prototype. Complete project prototype.