Presentation on theme: "RIT College of Engineering Multidisciplinary Senior Design P10054-Monitoring Device for Human Smoking Behavior Final Product Review 19 February 2010 RIT."— Presentation transcript:
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
Project Manager Frank Forkl Mechanical Engineer Brian Gilbane Electrical Engineer Derek Ng Systems Engineer Rich Steen Mechanical Engineer Michael Kraft P10054
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
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)
Remote Handheld Smoking Device Deep Inhalation Puff Sensor Belt Belt Clip Central Unit
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.
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 The signal-to-noise ratio from the BioPac belt was of a notably higher fidelity before amplification. http://www.biopac.com/ProductImages/tsd201.jpg http://www.sleepsense.com/pages/product
Criteria for Selection Cost Digital and Analog Inputs Digital Outputs Flash Memory Arduino Duemilanove Most economical Conclusions Real Time Clock (RTC) Storage Auto-Reset
Serial interface rather than parallel ~0.5 second per write operation Unreliable operation
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
DIP belt signal was too weak to be read properly INA128 Biomedical Amplifier is a higher fideltiy
Inaccuracies of either correlation Experimental noise Leaks in the pressure sensor system Air taken in by the smoker but not going through the cigarette
FeatureRationale Cigarette Detection (Infrared or other method)Time, Lack of EE Expertise, Deemed Bell/Whistle Wireless Communication Between Device Components Not necessary, possibly not actually desirable (losing pieces), lack of EE/CE expertise Wireless Communication for Data TransferTime, Lack of EE/CE Expertise, Deemed Bell/Whistle Internal Permanent Connection Between Board and BatteryTime, Lack of EE Expertise E-cigarette AdapterTime, Deemed Bell/Whistle Flow Path OptimizationTime, Lack of CFD expertise, will begin this work Cigarette Vent Hole Issue Very challenging problem, solution is being attempted but is not guaranteed Onboard Zeroing SensorsTime, Deemed Bell/Whistle, not wholly necessary Custom DIP Belt DesignTime, Lack of Expertise/Understanding in a timely manner, Cost Embedded Software Upgrades: Power Management, Data Processing, Automated Calibration Time, Lack of CE Expertise, team will make software functional and as advanced as possible Battery Life Improvements Lack of EE expertise. Incremental improvement, our design will be adequate but could be improved Case Design Upgrades for MoldabilityTime. Necessary for ramp up, will get done if possible Further Ergonomic Testing and Improvements Time: incremental improvement achieved through additional focus group Adding Retractable Wire Mechanism to Device Difficulty locating vendor of appropriate pre-fabbed mechanism. Will likely need custom design or custom part from vendor. Improved Durability Limited time to design case internal structure. Will meet minimum level but cannot guarantee beyond that
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