Light Source for a Stroboscope

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Light Source for a Stroboscope

• Erik Birkeneder Patrick Hill
• Clients Doug Montequin, Diane Bless, Ph.D.
• Advisor Willis Tompkins

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Presentation Outline

• Background
• Problem Statement
• Product Design Specifications (PDS)
• Preliminary Design Ideas
• Proposed Design Solution
• Future Problems
• Questions

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Background Information

• Fiber-optic strobe light in throat
• Strobe frequency set to give slow-motion image
• Record video of vocal cord vibration
• Detect abnormalities, problems
• Large, multi-component system

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Design Problem

• Need new light source for stroboscope
• Current source creates too much noise
• Current light source computer-dependent
• System mounted on a large cart
• Several separate components

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Product Design Specification (Summary)

• Under 2000
• Sound output lt65 Decibels
• Light output 300 Watts
• Strobe frequency 50-600 Hertz
• Dimensions 12" L x 10" W x 10" H

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Preliminary Strobe Ideas

• Purchasing Strobe vs. Designing Strobe

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Purchasing Strobe

• Advantages
• Time efficient
• Quality with experienced construction

• Disadvantages
• Cost
• Difficult to fit to specifications

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Constructing Strobe

• Advantages
• Fit specifications without modification
• Cost effective

• Disadvantages
• May require too much time

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Sound Dampening Alternatives

• Alpha-composite foam
• Sound frequency data filtering
• Active sound canceling

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Alpha Composite Foam

• Advantages
• Blocks 85 of sound
• Damps remaining sound 29 dB
• Relatively cheap
• Disadvantages
• Heavy
• Also thermal insulator
• May need cooling device

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Digital Data Filtering

• Advantages
• Cost effective
• Avoids large physical acoustic attenuators
• Disadvantages
• Limit spatial patient/strobe-source relations
• Complex microphone set up

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Active Noise Canceling

• Advantages
• Unit separate from strobe-source
• Disadvantages
• Relative Patient light-source position imperative
• Expensive
• Extremely complicated

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Proposed Design Solution

• Design strobe light
• Enclose strobe in alpha composite foam
• Data Differentiating

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Reasons for Choosing

• Foam
• Simple, easy to implement
• Cheap
• Effective
• Data Differentiating
• Basic circuitry
• Cost effective
• Compensate foam leakage

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Future Considerations

• Designing a strobe
• Acoustic barrier acting as thermal insulator
• Calibration of differentiating circuit

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Questions?