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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

 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