Team Members: Facilitator: Bradley Pasbjerg Prof. Lixin Dong - PowerPoint PPT Presentation

Team Members: Facilitator: Bradley Pasbjerg Prof. Lixin Dong Chengeng Qu Matthew Marcantonio Company contact: Ali Behbehani Jeffri Narendra

 Design Specification  Solution  Risk Analysis  Progress  Schedule  Budget

 Temperature accuracy: ◦ Within ±1C˚  Temperature range: ◦ -40C˚ to 85C˚  Fast heating  24/7 operation  Temperature deviation alert

 Control System: ◦ PWM ◦ PID  Cooling System: ◦ Liquid Nitrogen  Temperature Sensor: ◦ Accuracy ◦ Size  Digital User Interference

Temperature Sensor PID Control Algorithm Microcontroller Phase Fired Chamber Controller User Interface Alert system (12 button keypad)

 Phase fired controller

 PID Control Unit  PID Type C equation

 PID algorithm determines phase control position  Zero Cross detector triggers interrupt which begins a timer on the MCU  Phase controller triggered after timer reaches set point  Should work for both heating and cooling

 Working with wall voltage at high current. ◦ 120V AC @ 15A  Existing insulation is good enough  Thermodynamics of the chamber

Heater Batteries

 Components Ordered  User Interface Functional  Interrupt functional, but sporadic. Zero cross detector might not be getting a high enough voltage from our 10V test source. Testing with AC line voltage needs to be done.

Implement Design March / 20 th - 30 th Testing Design April / 5 th – 18 th Prepare for Design Day April / 23 th – April / 27 th

Microcontroller Provided Temperature Sensors $7 Liquid Nitrogen $50 Keypad $8 Alternistor $.73 LCD Provided Zero Cross Detector $.67 Total $66.40