Team Kevin Thompson EE Responsible for circuit design Sam Foster - - PowerPoint PPT Presentation

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Nov 21, 2022 418 likes •609 views

Team Kevin Thompson EE Responsible for circuit design Sam Foster EE Responsible for code which manages power distribution on the heated surface Craig Cogdill CompE Responsible for graphical user interface Stanley Nestler

SLIDE 1

SLIDE 2

Team

Kevin Thompson

EE – Responsible for circuit design

Sam Foster

EE – Responsible for code which manages power

distribution on the heated surface

Craig Cogdill

CompE – Responsible for graphical user interface

Stanley Nestler

MechE – Responsible for manufacture and analysis
f physical prototype

HexHeat Senior Design Colorado State University End of Semester Presentation December 11, 2013

SLIDE 3

Outline

1. Team & Project Introduction
2. Final Goals
3. Prior Research
4. Current Work
5. Budget
6. Plans for Next Semester
7. Questions

HexHeat Senior Design Colorado State University End of Semester Presentation December 11, 2013

SLIDE 4

Customer Needs

Current stovetops fall short in at least

ne of five major areas:

1) Number of heating elements 2) Size of the heating elements 3) Shape of the heating elements 4) Cookware material 5) Safety

HexHeat Senior Design Colorado State University End of Semester Presentation December 11, 2013

SLIDE 5

Final Goals

Cook for people at Engineering Days

– Create a surface which can heat any material of any size or shape, anywhere on the surface – Fully functional prototype

Can boil water in any size cookware placed on

the surface

100% duty cycle on all active elements
Intuitive and user-friendly graphical user

interface

HexHeat Senior Design Colorado State University End of Semester Presentation December 11, 2013

SLIDE 6

Prior Research

Independent Study in Spring 2013

– LED prototype – Heated prototype – Android based graphical user interface

HexHeat Senior Design Colorado State University End of Semester Presentation December 11, 2013

SLIDE 7

Physical Design

Original Design:

Sheathed tubular heating elements

– Benefit: Safety, reliability, simple electrical connections – Cost: $32 per element

HexHeat Senior Design Colorado State University End of Semester Presentation December 11, 2013

Sheathed Tubular Heating Element

SLIDE 8

Physical Design

Solution:

Uninsulated nichrome wire

– Benefit: <$1 per element – Cost: Flexible and prone to short circuits

HexHeat Senior Design Colorado State University End of Semester Presentation December 11, 2013

SLIDE 9

Physical Design

Solution continued:

Refractory brick

– Benefit: Maintain safe stovetop operation – Cost: Difficult to manufacture

Final Design – Isometric Model

HexHeat Senior Design Colorado State University End of Semester Presentation December 11, 2013

SLIDE 10

Circuit Design

Design Evolution:

First design

– Temperature controlled by gate voltage

Second design

– Temperature controlled by number of active current sources

Present design

– Temperature controlled by amount of time full power is applied to an element

HexHeat Senior Design Colorado State University End of Semester Presentation December 11, 2013

SLIDE 11

Circuit Design

Present Circuit Design

HexHeat Senior Design Colorado State University End of Semester Presentation December 11, 2013

SLIDE 12

Power Management Code

Progress this Semester:

– Duty cycle – Optimized algorithms – Thorough code testing

HexHeat Senior Design Colorado State University End of Semester Presentation December 11, 2013

Flow Diagram for Power Management Code

SLIDE 13

GUI

HexHeat Senior Design Colorado State University End of Semester Presentation December 11, 2013

SLIDE 14

Bill of Materials

HexHeat Senior Design Colorado State University End of Semester Presentation December 11, 2013

SLIDE 15

Plans for Next Semester

Begin small scale testing of new circuit design
Define packet structure for GUI-microcontroller

communication

Manufacture physical design
Test code thoroughly

HexHeat Senior Design Colorado State University End of Semester Presentation December 11, 2013

SLIDE 16

Conclusion

This semester has been productive!
We ran into challenges and we found

engineering solutions

We are closer to our final goal

HexHeat Senior Design Colorado State University End of Semester Presentation December 11, 2013

SLIDE 17

Questions?

Thank you for your time! For more information, please visit HexHeat.com. To contact us, please fill out the form under the Contact tab at HexHeat.com.

HexHeat Senior Design Colorado State University End of Semester Presentation December 11, 2013