1. P.I.D Control for a Wearable E-Braille Using a Force Sensing Resistor
Alejandro Martinez Arrieta
Advisor: Dr. Mohammad Saadeh
ET 494
Instructor : Dr. Cris Koutsougeras
Fall 2015

2. Braille Alphabet Louis Braille 19th century French. Array 3 x 2
According to the National Federation of blind enroll in school last year. The device is weareable on the dorsal side of the index finger. There are no present calues can be suitable for everyone. Increase or decrease force

3. Objectives
Identify different FSRs using a load cell to calibrate them.
Compare their mechanical properties such as, hysteresis, creep, linearity, and repeatability.
Use only FSR to measure accurate forces
Choose the best FSR candidate to use in a Braille-reading device with an electronic tactile display.

4. Objectives
Design a proportional-integral-derivative (PID) control system to drive a DC-motor.
The DC motor regulates the force on the finger pad.
FSR provides feedback sensory of the tactile force and the finger pad.

5. Assembled Prototype

7. Testing
FSR’s

8. Stability

9. DATA

10. Creep

11. Summer
Chirp Signal.

12. Design Disk Generator

13. Cam Mechanism
Create disks that can generate triangular and sinusoidal excitation signals that can be applied at the FSRs.

14. Dc Motor Spring
Bearing Shaft

15. SolidWorks Model

16. K constant F = k x

17. Future Progression September 2015
Order the parts and finish drawings in Solidworks.
Machining the piece and print the disks.
Find the K constant for springs.
Put together the cam mechanism.
October 2015
Collet data for each FSR using dynamic signal.
Model each FSR in Matlab.
November 2015
Develop a control system using LabVIEW
Incorporate a PID controller into control system