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Wheelchair Smart Anti-Tip System Design

Wheelchair Smart Anti-Tip System Design. Kyle Mobley, BME Garrett Spiegel, BME Andrew Lossing, ChBE Advisor: Dr. Mark Richter, President. Lossing, Mobley, Spiegel http://www.bme.vanderbilt.edu/srdesign/2009/group5/ SATS Senior Design 2009-10. Weight Placement Issues.

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Wheelchair Smart Anti-Tip System Design

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  1. Wheelchair Smart Anti-Tip System Design Kyle Mobley, BME Garrett Spiegel, BME Andrew Lossing, ChBE Advisor: Dr. Mark Richter, President Lossing, Mobley, Spiegel http://www.bme.vanderbilt.edu/srdesign/2009/group5/ SATS Senior Design 2009-10

  2. Weight Placement Issues • Side slopes • Increased rolling resistance • Increased severity of impact • Soft surfaces • Balance in wheelie position Lossing, Mobley, Spiegel http://www.bme.vanderbilt.edu/srdesign/2009/group5/ SATS Senior Design 2009-10

  3. Wheelie Advantages • 100% weight on rear wheels • Decreased rolling resistance • Decreased severity of impact • Braking while rolling downhill • Increased maneuverability Lossing, Mobley, Spiegel http://www.bme.vanderbilt.edu/srdesign/2009/group5/ SATS Senior Design 2009-10

  4. Need for Anti-Tip Systems • Tipping backwards • Doing a wheelie • “Tippy” wheelchairs • Injury to physical self… and self-esteem Lossing, Mobley, Spiegel http://www.bme.vanderbilt.edu/srdesign/2009/group5/ SATS Senior Design 2009-10

  5. Current Anti-Tip Systems • Wheelie bar • Decreased maneuverability • Increased rolling resistance • Increased chair weight • Hinders ability to perform wheelies • Hinders ability to perform curb cuts • Users commonly remove bars from chair Lossing, Mobley, Spiegel http://www.bme.vanderbilt.edu/srdesign/2009/group5/ SATS Senior Design 2009-10

  6. Last Year’s Advancements • Electrically triggered control • Allowed for maneuverability and protection • Options cannot be employed simultaneously • User-controlled settings • Allows for situational control • Need for user expertise • Non-continuous Lossing, Mobley, Spiegel http://www.bme.vanderbilt.edu/srdesign/2009/group5/ SATS Senior Design 2009-10

  7. Smart Anti-Tip System (SATS) • Senses chair orientation, movement • Computes location of COG • If threshold exceeded, deploy wheelie bar • Wheelchair-specific threshold Lossing, Mobley, Spiegel http://www.bme.vanderbilt.edu/srdesign/2009/group5/ SATS Senior Design 2009-10

  8. SATS Advantages • Simultaneously allows maneuverability and protection from tipping • Eliminates need for user input • No need for user proficiency Lossing, Mobley, Spiegel http://www.bme.vanderbilt.edu/srdesign/2009/group5/ SATS Senior Design 2009-10

  9. Project Methods • Identify problem • Research of thresholds • Various levels of “tippiness” • Research of transducers • Design of sensing system • Design of wheelie bar deployment system • Construction of prototype • Testing of prototype • Revisions Lossing, Mobley, Spiegel http://www.bme.vanderbilt.edu/srdesign/2009/group5/ SATS Senior Design 2009-10

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