Team Spirometer Progress Report July 2, 2009 – July 8, 2009 Team: Jeremy Glynn and Andrew Dias Client: David Van Sickle, PhD Dept. of Population Health Sciences UW School of Medicine and Public Health Phone: (608) 719-9531 e-mail: [email protected] Advisor: Mitch Tyler 2156 Engineering Centers Building Phone: (608) 262-5112 e-mail: [email protected] Goals for the past week - Complete and distribute newsletter - Create detailed physical design specifications for a Fleisch spirometer - Draft preliminary PCB layout - Acquire new Honeywell sensor with same specs as PCB-capable model - Start creating regulatory documentation as recommended by Naresh Accomplishments - Distributed second newsletter o Sent at 8:45 AM on July 8 o As of right now, a 31% open rate o Includes links to blog to encourage posting of feedback - Constructed new Fleisch-type spirometer o See newest post on openspirometry.org for pictures and a dimensions document - Tested new spirometer with 3 different port configurations o Compared functionality of ports located on the edge vs. in the middle o Full testing report should be composed by 7/9 o Summary: front port at edge and rear port in middle provided best sensitivity - Developed new body/handle configurations o Ports located on the side to minimize buildup of “gunk” o Body and tubing can disconnect for cleaning, attached with a snap-in mechanism - Ordered new PCB-compatible Honeywell sensor o Should arrive today (7/8), intending to test tomorrow - Meeting with Tom Fleming tonight to discuss microcontroller selection o Will clearly define how data is passed through the system and what processing/manipulation occurs at each step - Modeled 3 different port configurations in SolidWorks and performed flow analysisGoals for the upcoming week - Complete documentation for testing done on 7/8 - Test sensitivity of Honeywell 24PC01SMT sensor - Determine if additional modifications need to be done with the spirometer design o If this design cannot generate laminar flow, the capillary layout will need to be redesigned - Work with Amit to develop a usable PCB layout o Amit recently took a PCB layout course and has contacts familiar with the process o Pin connections on the main components are understood, but additional components (capacitors, resistors, diodes, etc.) that are needed to optimize functionality need to be determined - Try to obtain pressure and flow meters from Prof. Chesler’s contacts o A differential pressure meter would allow us to experimentally determine resistance much more efficiently, and a flow meter would allow us to expedite iLite calibration - Work with interns to develop the proper coaching implementation in the software o Recently discovered that Java will not be able to handle the video playback capabilities we want for the interactive coaching o The interns are re-examining Adobe AIR for media Difficulties - David will be out of town until July 28th or so. We will communicate regularly via e-mail until his return. He will be able to participate in our weekly meetings via a cellphone or Skype. - The new Fleisch model does not appear capable of creating a linear Flow-Pressure relationship. We will most likely need to decrease the capillary diameter even further to approximately 1 mm to correct the problem. Areas we would like assistance/feedback - Fluid mechanics – how does capillary length affect Reynolds number and laminar
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