Week 7 Progress Report
(2/12/2014 – 2/18/2014)
Team 1: Fluorescent Label Simulator
Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Final Testbed to be 95% built by Monday, 2/24
Photosensor testing on hold until transimpedance amplifier testing is complete and SMA/BNC cables arrive
Final testbed design nearly complete. Fabrication in progress.
Accomplishments from Previous Week
· >95% of all known required parts have been ordered
· Ultra-flat spray paint acquired. Testing confirmed the paint to be sufficiently non-reflective.
· Testing of Transimpedance amplifier in progress
· Final LED simulator and filter testbed mount designs nearly complete. Construction has begun.
· Multi-turn potentiometer determined to be the most applicable solution to distance measurement. Testing and fabrication of pot mount and gears in progress.
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Finish testbed design and fabrication (John, Mike, James)
Finish LED Simulator cassette design and fabrication (James)
Finish filter cassettes design and fabrication (Mike, John)
Report updating (Marina)
Labview VI and transimpedance amplifier (Kyle)
Distance measurement (Kyle, Marina)
Calibration photosensor testing (Marina)
Photosensor Testing (Marina, Kyle)
Determine necessity of door latch system after stray light testing (James, Marina, John)
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments
Comment: Consult ECE group for photosensor intensity measurement circuit diagrams Action: Created a transimpedance amplifier while waiting for ECE group response
Comment: Test strip size is not our project's concern Action: Do not factor test strip size into design
Comment: Theoretical optical analysis is not important Action: Experimental optical results are the most important data to be collected
Comment: Look for S-curve in photosensor intensity data Action: Check experimental results during testing
Comment: Stackable LED Simulator and filters in the same testbed mount is an optimal design Action: Has been incorporated into final design
Instructor Comments from Last Meeting and Actions Taken to Address these Comments
· Comment: In regards to theoretical light transmission through filters and lenses, look for specific conditions under which manufacturer transmission specs were performed. Action: None listed for bandpass filter, calculations should be possible for neutral density filter as wavelengths are blocked equally.
· Comment: Consider Hall Effect sensor or quadrature encoder for distance measurement Action: 10-turn potentiometer with 5:1 gear ratio was chosen for simplicity. DAQ USB 6009 does not support quadrature encoders
· Comment: Report looked good in the first chapter, but quality deteriorated in subsequent chapters. Action: Proofread report, cite sources, move "Impact on Society" to Chapter 5, correct typos, explain AlexaFluor, state actual size of ESE Quant Later Flow Device drawer, keep formatting consistent between tables and component sections, avoid future tense and use only present tense, place main design choices in component section and non-essential info in the appendix, use the term "inexpensive" rather than "cheap"
Risks and Areas of Concern
Adjusting polarizing filter orientation while placed in testbed mount
Resources or Information Required but not Available
Schedule
· Most of final Testbed and LED Simulator to finished between Saturday and Monday
Budget (list amount spent and amount remaining)
Spent: ~$2300
Remaining: ~$4200
Progress on Report and Webpage
Report: updates in progress