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Published byJoanna Parsons Modified over 9 years ago
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Andrea Castañeda, Daniel Miranda, Jennifer Wang, Kevin Yeroushalmi, Joseph Youssef Course Advisors: Gordana Vunjak-Novakovic, Keith Yeager, Aaron Kyle, Sarindr Bhumiratana, Matthew Bouchard Project Advisor: Professor Clark Hung Consultants: Professor Gerard Ateshian, Professor David Vallancourt, Yukkee Cheung
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Background Current status of design Tremor detection system Dampening system Demonstration of functionality Testing data Next steps
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5.5 million Americans suffer from intention tremors, which affect their ability to perform daily activities Our design targets the area of the arm which is most affected by these tremors Our device counteracts these tremors by counteracting unwanted motion in the arm and wrist
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Regulatory Pathways Relatively unhindered by regulatory committees No FDA or Pre-Market Approval (PMA) IRB approval Sales Strategy Online Retail 30 Day Money Back Guarantee Warranty/Servicing Retail Price: $1000
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Transcutaneous Electrical Nerve Stimulator (TENS)-- 60 mA, 4-6 Hz settings simulate intention tremors 5-7 lbs of dampening force counteract induced tremors at frequencies of 4-6 Hz
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Tremor Detection TENS Accelerometer Microcontroller Defined parameters
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Motion Dampening Rotary damper Acrylic moment arms Wrist brace Straps
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Arm forces
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TENS + Elbow Brace TENS Control TENS + Elbow & Wrist Brace TENS + Wrist Brace
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Identified ProblemsProposed Solutions Arm shifts within bulky attachmentNarrower bars/more rigid restraints shaped like arm Detection not incorporated into dampener Finalize electronic circuit Static hingeFabricate central axel and assemble dynamic hinge Current TENS setup may not accurately represent a tremor More leads or more accurate placement of leads
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Detection Dampening Assembly Automatic vs. Manual Deactivation Form Fitting Ergonomics Compact Circuitry Finalize Electronics April 29th Final Product
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Dampening Clutch Design Rotary damper Gear Solenoid
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Detection Dampening Assembly Automatic vs. Manual Deactivation Form Fitting Ergonomics Compact Circuitry Finalize Electronics April 29th Final Product
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Possible IssuesPossible Solutions Velcro allows for shiftingAdjustable straps and anatomically molded pieces Accelerometer inaccuracyMagnetic encoder OverdampeningHinge with lower torque rating Solenoid/clutch mechanism does not lock Explore other actuation options
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Detection system senses tremors Mechanical system dampens up to ~50% Integration of detection mechanism will allow for dynamic dampening Consolidation of parts will yield ergonomic device
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Course Advisors Gordana Vunjak- Novakovic, PhD Aaron Kyle, PhD Keith Yeager, MS Matthew Bouchard Sarindr Ick Bhumiratana Project Advisor Clark Hung, PhD Consultants Gerard Ateshian, PhD David Vallancourt, PhD Yukkee Cheung
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