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Project O.N.O.S.E. Optical Noxious Odor Sensing Electronics Capstone Preliminary Design Review Fall 2003.

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Presentation on theme: "Project O.N.O.S.E. Optical Noxious Odor Sensing Electronics Capstone Preliminary Design Review Fall 2003."— Presentation transcript:

1 Project O.N.O.S.E. Optical Noxious Odor Sensing Electronics Capstone Preliminary Design Review Fall 2003

2 Overview 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

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 Basic Instrument Functionality 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. LaserBeam Conditioning Photo-diode or CCD camera INPUT: vapor input switched between reference gas (air) and sample gas to simulate sniffing 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 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.

9 Black Box View Sniff Control Intensity Data Phase-Lock Loop Synchronization Existing Hardware 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 Our Circuit Optical Sniffer Transducer/CCD LCD Screen Sniff Control Switch Odor Intensity

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

12 Schedule

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

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

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 ComponentEstimated Cost Processor$10.00 FPGA$30.00 A/D, D/A$20.00 LCD$10.00 Wirewrap Board$40.00 Wires/caps/resistors$5.00 Power Supply$5.00 Power Converters$5.00 Serial Port$5.00 Digital Switch$2.00 RAM/ROM$10.00 Miscellaneous$20.00 Total:$162.00

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 Questions? 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


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