FRIDAY, DECEMBER 18, 2009 RYAN MILLER – ME, PROJECT MANAGER CHRIS OXLEY – EE, LEAD ENGINEER RYAN ENYEART – ME, SYSTEM ENGINEER ALEX MANLEY – EE, SYSTEM ENGINEER P10057 – Cigarette Smoking Machine D

Agenda Overview Customer Needs House of Quality System Design Project Planning Risk Assessment Knowns and Unknowns Q&A

Overview Follow-on project to P10054 – Monitoring Device for Human Smoking Behavior Acquisition of real-world DIP data Redesign of P10054 prototype for manufacturing Re-engineering of prototype to meet unmet needs and goals

Customer Needs – Ranked 1. Effective Solution 1. Measures DIP flow 2. Measures flow through cigarette 3. Complete data recording 4. Data Storage 5. Easy data offloading 6. Ease of data access 2. Ergonomics and Usability 1. No physical hazards 2. Must not alter behavior 3. Portable 4. Comfortable and ergonomically correct 5. Minimal required user training 6. Withstands daily use conditions 7. Long runtime 8. Indoor/outdoor use 9. Easy to charge

Customer Needs – Ranked 3. Manufacturing 1. Uses minimally expensive processes 2. Producible in large quantities 3. Minimal production waste 4. Maximum use of COTS 4. Documentation 1. Complete CAD package (electrical/mechanical) 2. Test procedures for system & major components 3. Clinical user guide 4. End-user guide 5. Prototype Assessment 1. Benchmarking 2. Focus Group Data

House of Quality

User Input Micro SD Data Storage Micro SD Data Storage Microcontroller Battery Signal Proc. Signal Proc. Signal Proc. Signal Proc. Amp Handpiece Automated On/Off Sensor Automated On/Off Sensor Temp. Sensor Temp. Sensor Pressure Sensor Pressure Sensor DIP Belt Strain Gauge Strain Gauge Calibration User Feedback User Feedback System Level Design Alex Manley Ryan Enyeart Chris Oxley Ryan Miller Airflow Path Packaging

System Design Alternatives Alternative ComponentReplaces Turbine SpirometerPressure, temperature sensors Velocity sensorPressure sensor Inductive sensorStrain gauge on DIP belt Piezoelectric respiratory effort sensorDIP belt

Project Planning, Weeks 1-4

Project Planning, Weeks 5-8

Project Planning, Weeks 9-11

Risk Assessment

Knowns and Unknowns Known:  Deliverables schedule  Rough customer needs based on own experience  Prototype form factor  Data types and ranges  Current P10054 challenges  Faculty resources  Refinement tasks  Secondary customer contact info Unknown:  Labview  Plastics modeling/manufacturing  Final prototype status at end of winter quarter (from P10054)  Realistic customer needs  Realistic timeline for some schedule events  Sources for some parts (chest belt)  Realistic smoking behavior  Method for converting deltaP into volume flow rate  Power usage target

Questions?