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Overview

Project O.N.O.S.E. Optical Noxious Odor Sensing Electronics Capstone Preliminary Design Review Fall 2003. Jennifer Sweezey Project Introduction Proposed Objective Andy White Existing Hardware Chris Bauer Approach outline Sub-systems. Diane Cyr Schedule Risks & contingencies

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Overview

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  1. Project O.N.O.S.E.Optical Noxious Odor Sensing ElectronicsCapstone Preliminary Design ReviewFall 2003

  2. Jennifer Sweezey Project Introduction Proposed Objective Andy White Existing Hardware Chris Bauer Approach outline Sub-systems Diane Cyr Schedule Risks & contingencies Anubhav Bhatia Upgrades Economics Overview

  3. Objective:Design and implement a processor, along with all additional necessary components, to interface with an existing optical nose instrument. This includes modules to control the device, collect and analyze data, and provide a human usable interface.

  4. Purpose: • Provide the existing optical nose instrument with a more versatile/complete control and interface system • Allow a user to accurately detect the presence and concentration of a chemical vapor • Provide a useful tool for a wide range of applications, such as: military operations, homeland security, perfume testing, etc.

  5. Baseline Objectives • To be able to detect one smell very well. • To take a known volume of air and detect if the chemical exists. • Calculate how many parts/million of the chemical is in the air. • Display concentration on an LCD as a number.

  6. Existing Instrument Hardware Large prototype version includes: the optics shown here, a function generator for vapor input switching, a phase-lock loop system for synchronization purposes, and a compressed air vapor input system

  7. Portable Version • About the size of a small flashlight • Small manual pump used to input vapor • All optics/electronics contained inside and run off of a battery • Something of about this size is the ultimate goal for our interface

  8. Beam Conditioning Laser Photo-diode or CCD camera Basic Instrument Functionality INPUT: vapor input switched between reference gas (air) and sample gas to simulate sniffing Polymer: reacts to the presence/concentration of different vapors by changing its physical shape. Affects the reflection of the beam into the rest of the system. Crystal Holography: dynamically adapts to create a pi phase-difference between the reference beam and the polymer- altered beam. This basically creates constructive or destructive interference, which can produce different light intensities. OUTPUT: intensity signal (or CCD image for polymer array). This signal/image will be recorded and fit to some calibration curve to determine vapor concentration in PPM or PPB

  9. Intensity Data Sniff Control Existing Hardware Phase-Lock Loop Synchronization Black Box View We will basically need to provide a sniff control subsystem, an intensity data collector/analyzer, and a phase-lock loop for synchronization between the sniff control and the output signal.

  10. Approach Outline Key Pad Sniff Control Optical Sniffer Our Circuit LCD Screen Switch Odor Intensity Transducer/CCD

  11. Sub-System Layout Key Pad Xilinx FPGA Motorola 68000 Sniff Control Digital Switch Serial Port LCD Screen 3.2V Power RAM Switch Odor D/A 5V Power A/D ROM Intensity

  12. Schedule

  13. Risks and Contingency Plan X1X • Risk 2: Connect it • Assumptions • User friendly vs. connecting XX2XX • Risk 1: Design • Customer wants vs. needs • Size vs. performance

  14. More Risks • Risk 4: Battery Power • Battery vs. outlet X3X • Risk 3: Feedback • Known PPM X4X

  15. Future Upgrades • Wireless Link • Makes use of a one way transmitter and receiver to send output data to a remote location • Rover Mount • Would allow the O.N.O.S.E. to be mounted on a RC rover, to send the system into possible hazardous locations and get the readout remotely

  16. Future Upgrades Continued • Capability to detect multiple scents • Exchanging single polymer ‘disks’ • Implementing multiple polymer arrays on a single disk

  17. Economics

  18. ROI/Impact on Society • Due to the numerous applications and uniqueness of the system, there is a large market share. • Assuming one could be sold for $200.00, the ROI would be at least 50%. • Society benefits from the possible increase in security, health benefits, and environmental safety.

  19. Sustainability • The processor unit is very sustainable • Parts are inexpensive and widely available. • The optical unit is more delicate and may require more expertise to maintain. • Optic system requires precise adjustment. • Laser and lenses are more expensive. • Transducers must be custom made.

  20. Jennifer Sweezey Project Introduction Proposed Objective Andy White Existing Hardware Chris Bauer Approach outline Sub-systems Diane Cyr Schedule Risks & contingencies Anubhav Bhatia Upgrades Economics Questions?

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