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
L OUISIANA T ECH U NIVERSITY MECHANICAL ENGINEERING PROGRAM FallWinterSpring CourseCreditsCourseCreditsCourseCredits ENGR 1202ENGR 1212ENGR 1222 MATH 2403MATH 2413MATH 2423 CHEM 1002CHEM 101 / 1032 / 1PHYSICS 201*3 College of Engineering and Science Open-Ended “Smart” Product Design Project
Louisiana Tech - College of Engineering & Science
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
RTD Design ( R esistance T emperature D etector) Required Specifications Nominal Resistance: 100 Thickness of film: ~200nm 5mm x 5mm solder pads Minimum width of trace: 200 μm 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 RTD Fabrication Steps 1.Nickel Deposition 2.Spinning 3.Soft Bake 4.Exposure 5.Development 6.Hard Bake 7.Etching 8.Dicing 9.Inspection 10.Soldering 11.Sealing Red – Freshmen do not perform these steps Italics – no picture shown
Louisiana Tech - College of Engineering & Science
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
Typical Program Flowchart NN
Louisiana Tech - College of Engineering & Science Total cost per student: $3.78 Louisiana Tech University College of Engineering and Science
Louisiana Tech - College of Engineering & Science Assessment
Louisiana Tech - College of Engineering & Science Assessment
Louisiana Tech - College of Engineering & Science Assessment
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.
Louisiana Tech - College of Engineering & Science Louisiana Tech University College of Engineering and Science Questions? For More Information: Michael K. Swanbom, Ph.D. P.O. Box Ruston, LA Office (318) FAX (318) This project was funded in part by NSF CCLI Grant No