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Louisiana Tech - College of Engineering & Science

Louisiana Tech University College of Engineering and Science. Microprocessor-Based Control System Project for Integrated Freshman Curriculum. Michael Swanbom Davis Harbour Hisham Hegab Danny Eddy www.livingwiththelab.com. Louisiana Tech - College of Engineering & Science.

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Louisiana Tech - College of Engineering & Science

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  1. Louisiana Tech University College of Engineering and Science Microprocessor-Based Control System Project for Integrated Freshman Curriculum Michael Swanbom Davis Harbour Hisham Hegab Danny Eddy www.livingwiththelab.com Louisiana Tech - College of Engineering & Science

  2. College of Engineering and Science Open-Ended “Smart” Product Design Project

  3. Louisiana Tech - College of Engineering & Science

  4. Salinity Feedback • Conductivity is measured to determine salinity • Two electrodes are embedded into a student-manufactured inline sensor • A 555 circuit is used to produce AC across the electrodes • Resulting frequency is proportional to conductivity • Boe-Bot counts the number of cycles in a given period • System is calibrated with known salt concentrations Louisiana Tech - College of Engineering & Science

  5. Louisiana Tech - College of Engineering & Science

  6. RTD Design (Resistance Temperature Detector) • Required Specifications • Nominal Resistance: 100 • Thickness of film: ~200nm • 5mm x 5mm solder pads • Minimum width of trace: 200μm • One RTD must fit in 2.5cm x 2.5cm square • Length versus width tradeoff must be calculated to achieve required nominal resistance • Students encouraged to be creative within the guidelines • 2D Drafting skills in SolidWorks are reinforced Louisiana Tech - College of Engineering & Science

  7. RTD Fabrication Steps 2 3 • Nickel Deposition • Spinning • Soft Bake • Exposure • Development • Hard Bake • Etching • Dicing • Inspection • Soldering • Sealing 4 5 8 7 Red – Freshmen do not perform these steps Italics – no picture shown 10 9 Louisiana Tech - College of Engineering & Science

  8. Louisiana Tech - College of Engineering & Science

  9. Actuators • Controller must actuate solenoid valves and a heating element to achieve control of the system • Electrical limitations of controller are discovered • Cascaded switching circuits are introduced • These circuits are then implemented Louisiana Tech - College of Engineering & Science

  10. Louisiana Tech - College of Engineering & Science

  11. N N Typical Program Flowchart Louisiana Tech - College of Engineering & Science

  12. Louisiana Tech University College of Engineering and Science Total cost per student: $3.78 Louisiana Tech - College of Engineering & Science

  13. Assessment Louisiana Tech - College of Engineering & Science

  14. Assessment Louisiana Tech - College of Engineering & Science

  15. Assessment Louisiana Tech - College of Engineering & Science

  16. Freshman Projects Laboratory Two classrooms designed to support the curriculum (40 students, 24 students) Classrooms allow us to easily switch between lecture, laboratory and shop activities within a single 110 minute class period.

  17. Louisiana Tech University College of Engineering and Science Questions? This project was funded in part by NSF CCLI Grant No. 0618288 For More Information: Michael K. Swanbom, Ph.D. P.O. Box 10348 Ruston, LA 71272-0046 mswanbom@latech.edu Office (318) 257-3908 FAX (318) 257-4630 Louisiana Tech - College of Engineering & Science

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