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Team 18: Automatic Outdoor heater control

John Howe and Daniel Gonzalez. Team 18: Automatic Outdoor heater control. Intro. We want to provide the existing heating system with automated control of the gas flow in order to provide customers an always-comfortable environment with changing conditions. The Company The Design Testing

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Team 18: Automatic Outdoor heater control

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  1. John Howe and Daniel Gonzalez Team 18: Automatic Outdoor heater control

  2. Intro We want to provide the existing heating system with automated control of the gas flow in order to provide customers an always-comfortable environment with changing conditions.

  3. The Company The Design Testing Results – Requirements/Verifications Challenges Cost Future Plans Recommendations Wrap-Up Outline

  4. Custom Installations • There is a need • Increase Revenue Awning Sun

  5. Feature Benefit • Automatic Temperature Control • Changes with conditions • Adjustable set-point • Can Retrofit Existing models • Set it and Forget it • Saves gas • More options • Easy Installation • Same as before Features and Benefits

  6. Design Overview

  7. ArduinoUno Linear vs. switching supply IR Sensor – ZTP 115 Design Choices

  8. Test Setup

  9. Test results

  10. Test setup

  11. Test Results

  12. Sensor Remote Variable Power Supply Arduino Requirements and Verifications

  13. Requirement Verification • 1)Should give a Temperature reading of surfaces below from 8 to 12 feet within 1 degree of actual • 1) Test our operating range of 20oF to 80oF using a temperature gun as reference Results Full Scale Test Indoors (8 Feet) : Average difference 3.77o F Small Scale Test Indoors (6 inches): Average difference 0.373o F IR Sensor

  14. Requirement Verification • 1) Send + and – signals to adjust setpoint • 1) Verify outgoing signals of the remote using the IR receiver connected to the arduino and lighting LEDs to show particular output Remote

  15. Requirement Verification • 1) Input: 24 VAC and Output 20.6, 16, 12, and 8 VDC within +/- 0.3 V and 0.1 V pk-pkripple • 2) Change output based on Arduino Input • 1) Verify In/Out Voltages both no-load and fully loaded with a multimeter • 2) Confirm appropriate voltage appears with each various input bit set. Variable Power Supply

  16. Requirement verification • 1) Input: 24 VAC and Output 9VDC within +/- 0.3 V and 0.1 V pk-pk ripple • 1) Verify In/Out Voltages both no-load and fully loaded with a multimeter Arduino Power Supply

  17. Requirements Verifications • 1) Receive and interpret +/- signals from remote control • 2) Adjust set point temperature and output to 7-seg. displays • 3) Convert Thermistor and IR Temp. Sensor input to a single temperature • 4) Output 3-bit, 3.3V signal to variable DC supply -Vary temperature ranges for the four modulation settings • 1) Use the Arduino to display what was received using print functions and the serial monitor • 2) Verify the correct output to decoder/7-segment displays by watching what is displayed/ what should be displayed via serial monitor • 3) Output result to serial monitor. And compare with commercial temp. gun • 4) Verify bits using multimeter/LEDs while running a controlled temperature test verifying temperatures with a commercial IR thermometer Arduino

  18. IR Sensor Voltage output very low • +/- Voltage hard to amplify…. 2.5 Volts • Heat Pattern • Full Scale Testing • Time Consuming Challenges

  19. Cost

  20. Our Unit: $51.97 (4.3% Cost of base unit) • Board we’re replacing: ~$30 • Replacing $60/hrinstallation of current modulation control • Customers claim natural gas bill reduction • End Result: Cheaper, more functional • Can increase price due to increased features Cost viability

  21. Awning Sun’s met safety standards not compromised Our design should last the lifetime of a unit Safety/Ethics

  22. Find/Quantify Emissivity of Surfaces • Concrete, Wood, metal, person etc. • Other Heat sources • Work out algorithm for each surface type • Add a fifth Voltage level of 4V for extra low-power (requested) • Add code to account for people • Run extended tests to assess reliability over time • Replace Arduino with a cheaper option Future Progress

  23. More Testing • Full Scale, Angled, Perpendicular, various surfaces • Using Data Acquisition Tool • Tests Take a long time Recommendations for further work

  24. Met the major goals of our project Learned the importance of rigorous testing, careful planning and meticulous organization Process of idea to product We are still designing and testing Summary

  25. Awning sun website Pictures from Dan SOURCES

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