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Mechanical Spine Test Platform P10007

Mechanical Spine Test Platform P10007. Final Project Overview GROUP MEMBERS : Irma Bocova Rob Bowman Phetphouvanh “ Awt ” Phommahaxay Kyle Pilote Jeff Rebmann Chris Rowles Faculty Guide : Dr. Elizabeth DeBartolo February 19, 2010. Agenda. Software LabVIEW Output Architecture

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Mechanical Spine Test Platform P10007

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  1. Mechanical Spine Test PlatformP10007 Final Project Overview GROUP MEMBERS: Irma Bocova Rob Bowman Phetphouvanh “Awt” Phommahaxay Kyle Pilote Jeff Rebmann Chris Rowles Faculty Guide: Dr. Elizabeth DeBartolo February 19, 2010

  2. Agenda • Software • LabVIEW Output Architecture • Validation and Verification • Specifications Attained • Project Overview • Future Iterations • Project Conclusion • Acknowledgements • Mission Statement • Project Description • Background/Application • Customer Needs • Engineering Specifications • Final Concept Selection • Mechanical Structures • Sensor • Demo (Time Permitting)

  3. Project Description • Project Title: Mechanical Spine Test Platform • Primary Customer • Dr. Sara Gombatto • Professor at Nazareth College of Physical Therapy • Dr. JJ Mowder-Tinney • Director of Clinical Education Nazareth College Department of Physical Therapy • Physical therapy patients • Secondary Opportunities • Further spinal iterations

  4. Background/Application • Nazareth Physical Therapy Clinic motion capture system • Allows motion capture of PT patients in order to track progress • Validation of existing motion captures • Focus on spinal segments • Secondary Application: • Portable Motion Tracking System calibration Source: http://seneludens.utdallas.edu/images/mocap.jpg

  5. Customer Needs • Three tiered approach to group needs and limit scope • Base Plan • Aggressive • Outstanding • Example Need: Must be moveable in distinct segments • Base Plan – Two distinct sections (Lower & Upper Lumbar) • Aggressive – Three distinct sections (Lower & Upper Lumbar, Thoracic) • Outstanding – Divide Thoracic segment into multiple segments

  6. Engineering Specifications • Correspond to highest ranked Customer Needs:

  7. Final Concept Selection • Main Structure Rendering • Spinal Structure & User Interface • Marker Placement Diagram

  8. Mechanical Structure Three segments separated by tightening ball-joints (lock into static position) Non-Ferrous (aluminum, brass, and wood) 1 inch increment segments (2-5 inches adjustability per lumbar segment) Fixed Pelvis ( adjustable height) with wooden base Horizontal members for reflective markers Brass set screws Flat black enamel coating

  9. Sensors Two MicroStrain 3DM Measures roll, pitch and yaw DC Accelerometers in orthogonal array with respect to Earth’s gravity Magnetometers with respect to Earth’s magnetic fields +/- 1.0 degree of accuracy

  10. Software • LabVIEW • Translate digital outputs of sensors • Outputs compatible to MS Excel spreadsheet • User Interface • User Interface

  11. Validation and Verification 3DM Sensor Mechanical versus electrical Offsite and Onsite testing Within +/- 1.0 degree of accuracy (roll, pitch and yaw) • Accuracy Testing (Worst Case) Sensor Test Fixture

  12. Validation and Verification • Spine Platform • Onsite testing • Mechanical and electrical • Simultaneous reading of 3DM • Interference (magnetic and infrared) • Static holding position (tension required) • Stability (tipping force) • Portability (overall weight) • User friendly (setup time and testing time) 1st Iteration Mechanical & Electrical test

  13. Specifications Attained

  14. Project Overview • Successes • Met a tight accuracy tolerance • Able to output real time data and capture to an external spreadsheet for further analysis • Created user friendly platform • Custom built ball joints and stand • Minimized sensor interference • Recommendations • Do not underestimate time needed to complete mechanical tasks • Outsource the welding • Use CNC machines when possible for accuracy and time purposes • Further understand the sensitivity issues of the magnetometer in the sensors • Have a better general knowledge of software/hardware integration

  15. Future Iterations • Add a thoracic region to better represent a human spine • Break the segments down even further if possible • Incorporate non-electromagnetic interference design • Look into purchasing NI LabVIEW license for Nazareth College • Wireless sensors • Powder coat or anodize to increase durability of coating • Use a plastic material instead of aluminum

  16. Project Conclusion The specifications for the final spinal structure and user interface were met for all base plan values and for some of the aggressive values and outstanding values Customer was satisfied with testing and verification Customer was satisfied with final user output design and functionality

  17. Acknowledgements • Dr. Sara Gombatto • Nazareth College Physical Therapy Department • Dr. Elizabeth DeBartolo • Faculty Guide – Rochester Institute of Technology • National Science Foundation • Project Sponsor • Dr. Robert Bowman • EE Professor – Rochester Institute of Technology • Professor John Wellin • Professor Madhu Nair • RIT Machine Shop Staff

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