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40 Glove based Wheelchair Navigation
Anumay Mishra
Lakshya Lahoty
Tanvi Shah
Jonathan Hoff design_document1.pdf
**Group Members**:
Tanvi Shah(tanviss2), Lakshya Lahoty (llahoty2), Anumay Mishra(aam2)

Glove based Wheelchair Navigation

Individuals with disabilities like paralysis or cerebral palsy find it hard to navigate a wheelchair using a joystick on the arm of the chair, considering limited hand control and movement. This is the inspiration to create a pair of gloves which can facilitate the manoeuvring of the wheelchair with limited arm movement.

**Solution Overview**:
The device (i.e. pair of gloves) would consist of two hand gloves; one with flex sensors to control the acceleration and speed of the motors. This is not accounting for the direction. We utilize a ball tilt sensor or an accelerometer in order to allow the user to accurately control the direction of the wheelchair, forward, back, left and right. The data from the sensors is fed into a microcontroller (we are using Arduino) which transmits the information of motion and acceleration/deceleration to the motors (the glove is wired to the chair). We will have one PCB that will encompass the data from the two sensors and relay the information to the motors. We will implement certain bandwidth filters that won't allow faulty data, essentially a threshold to make sure readings are appropriate. There will also be an emergency fail-safe switch that decelerates and stops the wheelchair if needed.

**Solution Components**:
- 5 flex sensors for each finger of the left hand: the idea is to use the data and pressure from the folding of the hand to quantify the speed of the motors in the chair.
- Ball tilt sensor or ADXL345 Accelerometer for the second glove to detect the direction of the motion.
- Microcontroller - Arduino will be used to get feedback from the sensors in the gloves and control the speed and direction of the motors of the wheelchair accordingly
- Batteries, rechargeable and powerful enough to last hours
- Motors
- Push-Button switch which we use to incorporate the emergency fail-safe to decelerate and stop the motors quickly
- Motorized toy car/wheel for the wheelchair simulation

**Criterion for Success**:
- Successfully be able to control speeds using clenching of the glove
- Successfully be able to navigate the wheelchair by tilting the hand in the desired direction
- Have a fail-safe mechanism to be able to detect harmful speeds and react appropriately to emergency situations
- Be able to filter out the faulty data such that the values remain inbound that are acceptable.

Assistive Chessboard

Robert Kaufman, Rushi Patel, William Sun

Assistive Chessboard

Featured Project

Problem: It can be difficult for a new player to learn chess, especially if they have no one to play with. They would have to resort to online guides which can be distracting when playing with a real board. If they have no one to play with, they would again have to resort to online games which just don't have the same feel as real boards.

Proposal: We plan to create an assistive chess board. The board will have the following features:

-The board will be able to suggest a move by lighting up the square of the move-to space and square under the piece to move.

-The board will light up valid moves when a piece is picked up and flash the placed square if it is invalid.

-We will include a chess clock for timed play with stop buttons for players to signal the end of their turn.

-The player(s) will be able to select different standard time set-ups and preferences for the help displayed by the board.

Implementation Details: The board lights will be an RGB LED under each square of the board. Each chess piece will have a magnetic base which can be detected by a magnetic field sensor under each square. Each piece will have a different strength magnet inside it to ID which piece is what (ie. 6 different magnet sizes for the 6 different types of pieces). Black and white pieces will be distinguished by the polarity of the magnets. The strength and polarity will be read by the same magnetic field sensor under each square. The lights will have different colors for the different piece that it is representing as well as for different signals (ie. An invalid move will flash red).

The chess clock will consist of a 7-segment display in the form of (h:mm:ss) and there will be 2 stop buttons, one for each side, to signal when a player’s turn is over. A third button will be featured near the clock to act as a reset button. The combination of the two stop switches and reset button will be used to select the time mode for the clock. Each side of the board will also have a two toggle-able buttons or switches to control whether move help or suggested moves should be enabled on that side of the board. The state of the decision will be shown by a lit or unlit LED light near the relevant switch.

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