RIT College of Engineering Multidisciplinary Senior Design

1. RIT College of Engineering Multidisciplinary Senior Design P10054-Monitoring Device for Human Smoking Behavior Final Product Review 19 February 2010 RIT Engineering Multidisciplinary Senior Design P10054 - Monitoring Device for Human Smoking Behavior Detailed Design Review 6 November, 2009

2. Team Members Project Manager Frank Forkl Mechanical Engineer Michael Kraft Systems Engineer Rich Steen P10054 Mechanical Engineer Brian Gilbane Electrical Engineer Derek Ng

3. Introduction Objective: • Create device which measures natural human smoking behavior Major Requirements: • Subjects will need to carry device for up to one month in the field • Subject will use device for every cigarette smoked • Device must be as unobtrusive as possible • Data to capture: • Flow Rate through cigarette • Total Lung Volume to measure Deep Inhalation Puff

4. Existing TechnologyCReSS Device by Plowshare Technologies • A self-contained battery operated device that measures ambulatory smoking behavior with time and date tags assigned at cigarette insertion/removal. • Onboard memory is used to store all measures for up to four weeks without requiring interaction with study staff. http://www.plowshare.com/products/portable/index.html • Major Problems: • Extremely obtrusive which does not allow for natural smoking behavior • Unable to capture entire smoking event (Deep Inhalation Puff) • Performs poorly at bottom of flow rate resolution (less than 17.5 mL/s) • Does not output Flow Curves, just aggregate data • Extremely expensive (~$2000)

5. Chosen Concept Remote Handheld Smoking Device Deep Inhalation Puff Sensor Belt Belt Clip Central Unit

6. System Diagram

7. Flow Path Design Process

8. Handheld Device Ergonomic Foam Mock Ups Finished Handheld Designs

9. Deep Inhalation Puff (D.I.P.) The deep inhalation puff is the breath of “clean” air after taking an initial draw on a cigarette. This “clean” air includes side stream smoke or commonly known as second hand smoke. By capturing the deep inhalation puff, the device will provide more accurate data than the CReSS device on how a human smokes a cigarette during an entire smoking event.

10. Which type of belt? • SLP Inc. Inductive Bands • Closed loops of conductive wire woven in an elastic band • Flow of the current is limited by a change in magnetic flux • BioPac Strain Gauge Belt • Linear strain gauge attached to an adjustable elastic band • Strain from tension is converted to a voltage signal http://www.biopac.com/ProductImages/tsd201.jpg http://www.sleepsense.com/pages/product The signal-to-noise ratio from the BioPac belt was of a notably higher fidelity before amplification.

11. Arduino Microcontroller • Criteria for Selection • Cost • Digital and Analog Inputs • Digital Outputs • Flash Memory • ArduinoDuemilanove • Most economical • Conclusions • Real Time Clock (RTC) • Storage • Auto-Reset

12. Data Storage • Serial interface rather than parallel • ~0.5 second per write operation • Unreliable operation

13. 12Volt DC 1800mAH rechargeable lithium-ion battery • Disposable battery would • Requires frequent replacement • Process more complicated for the customer. • Two main factors • capacity of the battery • cost. • Other factors: • size • weight • amount of voltage supplied • Requires external jumper

14. Signal Amplification • DIP belt signal was too weak to be read properly • INA128 Biomedical Amplifier is a higher fideltiy

15. Belt Clip Case

16. Pressure Sensor Correlation

17. BioPac/Spirometer CorrelationTidal Volume vs. Time

18. BioPac/Spirometer CorrelationFlow Rate vs. Time

19. Simulated Smoking Behavior 2 1

20. Simulated Smoking Behavior Inaccuracies of either correlation Experimental noise Leaks in the pressure sensor system Air taken in by the smoker but not going through the cigarette

21. Features Deemed Beyond Project Scope

22. Thank You All pictures used under educational fair use