Automated wheel chair

Published Jun 13, 2020

Apache-2.0

5 hours to build

Beginner

stm32

Our team main aim is to solve the problem of mobility of paralyzed people by controlling the speed and direction of the wheel chair by head movements.

Components Used
L298N Motor driver L298N is a high current, high voltage dual full bridge motor driver. It is useful for driving inductive loads.	X 1
MPU6050 Gyroscope and Accelerometer MPU6050 (Gyroscope + Accelerometer + Temperature) is a combination of 3-axis Gyroscope, 3-axis Accelerometer and Temperature sensor with on-chip Digital Motion Processor (DMP). It is used in mobile devices, motion enabled games, 3D mice, Gesture (motion command) technology etc	X 1
Lithium Ion Battery 3.7V 2500mAh 18650 Consumer Battery &amp; Photo Battery 3.7V 2500mAh	X 3
nRF24L01 2_4GHz Transceiver nRF24L01+ is a single chip RF transceiver for 2.4GHz ISM band.	X 2
Wheel for DC Gearbox Motors Adafruit Accessories Skinny Wheel for TT DC Gearbox Motors	X 4
STM32F103C8T6 32-Bit Cortex M3 Microcontroller ARM Microcontrollers - MCU 32BIT Cortex M3 64KB 20KB RAM 2X12 ADC	X 2
DC Gear Motor AC, DC & Servo Motors 12V DC planetary gear motor, 27 rpm, 1/150 gear ratio, 37mm diameter	X 4

Description

PROBLEM STATEMENT

Our problem statement is to help the paralyzed to move their wheel chair without others assistance. To transform our idea into actions we've started building our prototype.

TEAM'S APPROACH:

Our team’s main aim to solve the problem of the mobility of the paralyzed people by controlling the speed and direction of the wheelchair by the head movements that help in moving from one place to another place easily with a negligible amount of difficulty.

We could design an electronic wheelchair that would move according to the instructions of the patient by his head movements and that would be completely wireless transmission with good accuracy.

This prototype solves the problem of mobility of paralyzed people by controlling speed and direction of wheel chair. The head movements decide the speed and direction of wheel chair with almost negligible amount of difficulty

Components

STM 32
NRF 24L01
GYRO SENSOR(MPU6050)
MOTOR DRIVER(L298N)
CENTER SHAFT MOTORS

STEP 1

Install aurdino ide in your pc and also install respected libraries like nRF24L01,SPI,RF24-STM_config.

STEP 2

Connect the gyro sensor and a NRF module which (will act as the transmitter) to STM32(micro controller) with which we can be able to know the information of movement

Transmitter Connection

Receiver Connection

STEP 3

Also connect NRF module to the micro controller which will act as transceiver for the project.

STEP 4

Then connect the motor driver to the motors and also to the micro controller .

STEP 5

Now power the motor driver with external battery or any power bank.

WORKING

The Automatic Wheel Chair it's movement is depends upon the change in degrees of freedom detected by the gyro sensor (X,Y,Z axis) . The information is transferred by the nrf module attached to the gyro sensor and received by the nrf module attached to the wheel chair. This whole information transferring occurs in SPI communication protocol .

The movements of wheels of the wheel chair is controlled by the motor driver , which can be altered by the motion of the user's head