1. The Smart Walker Project TEAM: CHEN ZHANG, YI LU PRESENTED BY: YI LU

2. Background 3 million walker users in America 2/3 report limitations in instrumental activities of daily living 1/3 still need assistance from others

3. Customer Need and Project Scope  Standing-up support  Gait assistance through acceleration detection  At least 2-3 hours of sustain  Portable Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps

4. Outline of the Frame Schedule 40 6063 T6 Aluminum pipe Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps

5. Pressure Analysis Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps

6. Tilt Analysis Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps

7. Tilt Analysis (cont’d) Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps

8. The Electronic Sensor System The Processor The Arduino UNO Robust 8-bit microcontroller 14 digital pins and 6 analog pins Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps

9. The Accelerometer for Gait Assistance ADXL345 Measurement range: ±2, ±4, ±8, ±16 g Resolution: 3.9mg/LSB (10bits) Acceleration: 0.52g Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps

10. The Accelerometer for Gait Assistance Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps

11. The Ultrasonic Range Finder HC-SR04 Ultrasonic distance measuring sensor Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps

12. Mechanism Sensor 1 : Upper body distance from the frame. Sensor 2: Lower body distance from the frame. Need and Scope Feasibility Chose Design Details Parts and Manufacturing Conclusion and Next Steps

13. Performance Calculation Maximum sensing range: 2m Two sensors attached to the midpoints of pipes To make sure that the sensors work when the object appears 2m to the edge of the frame: Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps

14. The Frame 55.9cm×45.7cm×99.1cm Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps

15. Flow Chart: Standing-up Support Need and ScopeFeasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps

16. Flow Chart: Gait Assistance Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps

17. Wiring Diagram and Power Calculations Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps  The Arduino pins draws most of the power  9V DC battery

18. Parts and Costs - Frame Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps Price of the frame: $180 Weight of the frame: 5kg

19. Parts and Costs - Electronics Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps Price of the electric system: $155 Weight of the electric system: 1.07kg Total price: $335 Total weight: 6.07kg

20. Assembly Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps

21. Electronics Mounting Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps

22.  Basic functions achieved  Still needs to improve on functionalities  Motor and hydraulic brake combination  Gradual speed reduction  User profile memory  Foldability Need and Scope Feasibility Chosen Design Details Parts and Manufacturing Conclusion and Next Steps