Interactive Recharging Station The Chair Generator Husain Alsaffar, - - PowerPoint PPT Presentation

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Interactive Recharging Station The Chair Generator Husain Alsaffar, - - PowerPoint PPT Presentation

Oct 22, 2022 255 likes •464 views

Interactive Recharging Station The Chair Generator Husain Alsaffar, Casi Garcia, Derek Pacheco, Nicholas Schulz Project Description Project Goal: Design and build a mobile device recharging station that is interactive, educational and

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SLIDE 1

The Chair Generator Husain Alsaffar, Casi Garcia, Derek Pacheco, Nicholas Schulz

Interactive Recharging Station

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SLIDE 2

Project Description

04/26/19 Casi Garcia

Project Goal:

  • Design and build a mobile device recharging station that is interactive, educational and

enjoyable for all users utilizing its capabilities.

  • Build design within a supplied budget of $2000.

Stakeholders/Beneficiaries:

  • Dr. Sarah Oman
  • Ms. Kayla Goodrich
  • Northern Arizona University Engineering Building, Present & Future:
  • Students
  • Faculty
  • Visitors
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SLIDE 3

NAU Eco-Peddler (Yellow Bike)

  • Previous NAU capstone project.
  • Funded by the NAU Green Fund.
  • Has had 3 iterations generated in the last 10

years.

Background

04/26/19 Casi Garcia

Figure 1. Yellow Bike.

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SLIDE 4

Is the Eco-peddler being used? Why not?

  • Awkward (52)
  • Inefficient (Doesn’t Charge Phone) (15)
  • Boring (12)
  • Too Demanding (9)
  • "Bad Advertising"(10+)

Background Cont.

04/26/19 Casi Garcia

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SLIDE 5

Customer Requirements Engineering Requirements​ Target Value​

  • Max. Weight​

< 100 lbs.​ Dimensions​ < 36x36x72 in.​ Power Generation​ = 5 Volts​ > 0.25 Amp.​ Engineering Principles​ > 1 principle​ Noise​ ≤ 75 db.​

  • Max. Force​

≤ 275 lbs.​

Requirements

04/26/19 Husain Alsaffar

  • Portable
  • Easy Disassembly
  • Recharge Capabilities
  • Educational
  • Audience Comfort
  • Durable

Table 1. Engineering Requirements and Target Values.

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SLIDE 6

Chair Generator (Chair Gen.)

  • Users use swiveling action in an office chair to

generate electricity

  • Selected for comfortability and ease of use
  • Initial Concept
  • Custom alternator mounted to chair shaft
  • Electrical ports, cables and converters to be housed in

electrical box mounted to side of the chair

Design Process: Selected Design

04/26/19 Husain Alsaffar

Figure 2. Original Concept.

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SLIDE 7

Revision 2: Gearbox Design

  • Eliminated need for custom alternator.
  • Generated higher RPM input to generator.

Revision 3: Pulley Design

  • Less complicated than gearbox.
  • Less torque required than gearbox.
  • In safer position than gearbox.

Design Process: Revisions

04/26/19 Nicholas Schulz

Figure 3. Revision 2. Figure 4. Revision 3.

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SLIDE 8

Sprocket Design

  • 1:6 Ratio.
  • Internally Routed Cables.

Final Design

04/26/19 Nicholas Schulz

Figure 5. Final Design.

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SLIDE 9

Manufacturing

04/26/19 Derek Pacheco

Figure 6. Manufacturing the Design.

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SLIDE 10

Shaft

Tapered Roller Bearings

Wheels

3” Rubber Wheels Hollow, Aluminum, Non-adjustable

Base

Manufacturing: Chair

04/26/19 Derek Pacheco

Figure 7. FEA of Shaft vs. Actual Shaft. Figure 8. Bearings Press Fit into Chair Base. Figure 9. Added Wheels.

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SLIDE 11

Sprockets

Waterjet by MarZee Inc.

Generator

5V-24V Mini Wind Turbine Generator 6:1 Ratio

Generator Base

Manufacturing: Generator Base

04/26/19 Casi Garcia

Figure 10. Sprockets and Chain. Figure 11. Generator Base Plate. Figure 12. Generator.

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SLIDE 12

Electrical Housing

Waterjet by MarZee Inc.

Electrical Wiring

Pass-Through Charging Battery, Electrical Wiring, Switch

Electrical Base

Manufacturing: Electrical Box

04/26/19 Nicholas Schulz

Figure 13. Electrical Box. Figure 14. Electrical Base Plate.

Generator Rectifier 100 µF Capacitor Voltage Regulator 22 µF Capacitor Switch LED Screen

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SLIDE 13

Manufacturing: Electrical Schematic

04/26/19 Nicholas Schulz

Figure 15a. Electrical Box. Figure 15b. Electrical Box Schematic.

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SLIDE 14

Final Assembly

04/26/19 Husain Alsaffar

Figure 16. Manufactured Design.

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Testing: Results

04/26/19 Husain Alsaffar

Engineering Requirements​ Target Value​ Actual Value​ Pass/ Fail​

  • Max. Weight​

< 100 lbs.​ ~ 45 lbs.​ Pass​ Dimensions​ < 36x36x72 in.​ 28x34x38 in. Pass​ Power Generation​ = 5 Volts​ 5 Volts​ Pass​ > 0.25 Amp.​ 0.71 Amp.​ Pass​ Engineering Principles​ > 1 principle​ 4 principles​ Pass​ Noise​ ≤ 75 db.​ 68.9 db. Pass​

  • Max. Force​

≤ 275 lbs.​ 277.1 lbs.​ Pass​

Table 2. Engineering Requirements, Target vs Actual Values.

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Durability: Hold ≤ 275 lbs. (95% of Adult Men) Dimensions ≤ 3x3x6 ft. Weigh ≤ 100 lbs. Portability:

Testing: Methods

04/26/19 Derek Pacheco

Figure 17. Durability Test. Figure 18. Weight Test. Figure 19. Size Test.

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SLIDE 17

Quietness: Noise ≤ 75 db.

Spinning ≥ 10 RPM

Reliability: Outputs ≥ 5V Educational: Engineering Principles ≥ 1

Human Energy Rotational Energy Mechanical Energy Electrical Energy

Testing: Methods Cont.

04/26/19 Derek Pacheco

Figure 20. Noise Test. Figure 21. Reliability Test.

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SLIDE 18

Special Thanks!

04/26/19 Husain Alsaffar

  • Dr. Sarah Oman, Mechanical Engineering Department
  • Ms. Kayla Goodrich, Honeywell
  • Professor John Sharber, Electrical Engineering Department
  • NAU Machine Shop
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SLIDE 19

Questions?