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MSD1 Senior Design Project- Oxygen Gas Sensor

MSD1 Senior Design Project- Oxygen Gas Sensor. P09051 Samuel Shin Jeremy Goodman Sponsor: RIT uE & EE department Project Guide: Professor Slack. Agenda . Project description High Level Customer Needs/ Eng Specs Concept Description & Rationale System Architecture High Risk Assessment

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MSD1 Senior Design Project- Oxygen Gas Sensor

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  1. MSD1 Senior Design Project- Oxygen Gas Sensor P09051 Samuel Shin Jeremy Goodman Sponsor: RIT uE & EE department Project Guide: Professor Slack

  2. Agenda • Project description • High Level Customer Needs/ Eng Specs • Concept Description & Rationale • System Architecture • High Risk Assessment • Current State of Design • Milestone Schedule for Next Quarter

  3. Project Description • Oxygen gas detection via fluorescence quenching. • Based on Tris-Ruthenium[II](dichloride) material incorporated in an oxygen-permeable polymer • Responds to gaseous %Oxygen which changes fluorescent intensity and lifetime • Higher O2 conc = decreased intensity and lifetime • Method has been researched and is widely used • Expensive • Equipment not readily available to everyday user • Plan is to design a complete cost & size- efficient sensor system for the measurement of % Oxygen

  4. High Level Customer Needs / Eng Specs • Provide consistent measurement results • LED pulse width at 100ms • Entering wavelength at 455nm • Cost and size-effective • Commercially available LED source • Standard electronic components for signal conditioning • Low-cost, high performance optical filters • RIT SMFL designed/built photodetector • Ru(dpp) polymer created in RIT Chem dept.

  5. Concept Description/ Rationale • Incorporate the entire system inside a light-tight box • Inject fixed amounts of nitrogen and oxygen to exhibit an environment with fixed %Oxygen

  6. System Architecture Input Signal (100ms pulse width from function generator) LED Pulsing Circuit (455nm) Ru(dpp) Thin Film (fluorescent material) – emitting wavelength of 613nm Signal Conditioning Amplified Signal in Oscilloscope (I or V vs. Time)

  7. High Risk Assessment • Still a proof of concept • Design will have to be modified to match needs • Unclear Parameters will exist • Where noise is coming from, etc • Materials • Creating Ru(dpp) polymer has to be done with help from a faculty member

  8. Current State of Design • Preliminary Circuit Simulations complete • Ru(dpp) Polymer • Acquired dry chemical • Need polymer component (still being researched) • Budget • Major sources that need funding • Gas Flow Chamber • Optical Glass Filter • Protoboards • Electronics (various components) • Projected amount at ~$600 dollars

  9. Milestone Schedule For Next Quarter • Wk1-2 (March 9th – March 20th ) • Mix polymer/ start on photodiode design • Obtain all electronics and test chamber materials • Wk3-6 (March 23rd-April 3rd) • Characterize output behavior of photodiode • Noise Analysis • Start on fabrication of photodiode • Target completed at Wk 6 • Assembly of Chamber • Wk 6-8 (April 13th – May 1st) • Complete Testing of Prototype Oxygen Sensor • Wk 8-9 (May 4th – May 15th) • Documentation / Preparation for Presentation, etc

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