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Calvin College Senior Design Team 11 Aaron Maley Jeff Overweg Simeon Eisen Jacob VanderWall

Calvin College Senior Design Team 11 Aaron Maley Jeff Overweg Simeon Eisen Jacob VanderWall. The Team. Simeon Eisen Jeff Overweg Aaron Maley Jacob VanderWall. A Niche in the Market.

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Calvin College Senior Design Team 11 Aaron Maley Jeff Overweg Simeon Eisen Jacob VanderWall

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  1. Calvin College Senior Design Team 11 Aaron Maley Jeff Overweg Simeon Eisen Jacob VanderWall

  2. The Team • Simeon Eisen • Jeff Overweg • Aaron Maley • Jacob VanderWall

  3. A Niche in the Market • There are current pool care systems, but they are not created and marketed to the average residential pool owner. • Current systems range in price from $1200-$7000 for just the controller alone • A product with the features of the high end systems, at a price that residential pool owners can afford would be a very viable real world product

  4. The Project • To create an affordable chemical control system for the residential pool market. • What Does it Do? • Sample pool water at regular intervals • Microprocessor controlled system • Dispense chemicals into the pool pump system • Granule feed system • Broadcast pool data via website • Wireless module

  5. Microcontroller System • Goal: • Use an embedded microcontroller to control water testing, chemical dispersal, local display, and data being sent to web server. • Major Components and Interfaces: • Sensors and Related Circuits • Chemical Dispersal Control • Local Display/User Interface • Analog Data to Web Server

  6. Microcontroller System • Full System Diagram

  7. Microcontroller System • Sensors and Related Circuits • Three main sensor inputs • Temp, pH, ORP • How are the amounts of Chemicals Needed Calculated? • pH, ORP, temperature readings and size of pool are used to calculate the required dosage • Dosage precision can exceed 0.25 oz

  8. Free Chlorine Calculation

  9. Microcontroller System • Local Display/User Interface • Graphic LCD • Touch Screen Interface • What does this allow the user to do? • Directly view relevant information • Calibrate probes and sensors • Define parameters such as: • Pool Volume • Pump Cycle Time

  10. Microcontroller System • Data to Web Server • Analog Level Created with: • PWM signals passed through a low pass filter • How does the Web Server Interpret Values? • Varying Duty Cycles Form Different Voltage Levels • Communication Specification for Analog Interpretation Defines Relationships

  11. Microcontroller System • Chemical Dispersal Control • Digital Control Logic (Stepper Motor Control) • Solenoid Valve Channel Control • How the System Disperses the Chemicals

  12. Instrumentation Setup • Sensor Chamber Design

  13. Dispenser • Goal: • To create an interface that would utilize the existing pool pump and filter system to dispense and mix chemicals into the pool water. • Two distinct elements • Auger Based Dispenser • Diverted Mixing Chamber

  14. Mechanical Setup • Final Mechanical Implementation Pool Dispenser Pump Filter Sensor Chamber

  15. Mechanical Setup • Dispenser System Design

  16. Mechanical Setup • Dispenser Prototype

  17. Working Components

  18. Dispensing Calibration

  19. Stepper Motor and Solenoid Control

  20. Wireless Web Server • Goal: • To create a basic web server in order to wirelessly broadcast system readings to the consumer. • Main Components • 802.11b Chip/Security Settings • Analog Input/Calculations • Website Design

  21. Wireless Web Server • 802.11b Chip/Security Settings • Chip/Development Board Selection • Arduino Development Kit • Wishield • Security Capabilities • Compatible with modern 802.11b/g routers • Can utilize 64bit WEP, WPA, WPA2 encryption

  22. Wireless Web Server • Analog Input Calculations • Varying Duty Cycles + Low Pass Filter • Analog Voltage 0V – 5V • Communication Specification Determines pH, ORP, Chemical Status, Temperature • Calculation of Free Chlorine PWM Low-Pass Filter + 0-5 Volts Analog

  23. Wireless Web Server • Page Design

  24. Wireless Web Server • System Block Diagram

  25. Competitive Analysis • Main Competitors: • Chemtrol • CAT • Aquasol

  26. Sales & Marketing • Customer Base • Existing( US alone) • 5.1 million in-ground pools • 3.7 million above-ground pools • Growth( Based on 2007) • 131,000 new in-ground pools • 233,000 new above-ground pools • Target Demographic • Work with BUS 397 Advanced Marketing Class • Middle-aged to Elderly in Average Middle to Upper Middle Class Homes

  27. Going Beyond • Different ways project could be enhanced or developed further. • Expand Wireless Capability and Complexity • Add Online Data Logging • Add Wireless System Control • Use Precision Designed Mechanical Parts • Integrate onto single PCB • Develop Business Plan as a Distributer and/or a Supplier

  28. Acknowledgements • Tim Theriault– Industrial Consultant • Prof. VanderLeest – Team Advisor • Brian Honeck, Eric Walstra, Darryl DeBruin – CEAC Reviewers • Bob DeKraker – Parts Ordering • Phil Jasperse – Shop Help

  29. Questions

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