Dr . AMBEDKAR INSTITUTE OF TECHNOLOGY (An Autonomous Institution, Affiliated to V.T.U)

BANGALORE-560 056

IOT operated Wheel chair

Submitted by:Lavanya KMadhavi S GVasanth kumar BVYogeesh M

Under the guidance of: Smt. Vidya HAssociate professor

Dept. of TCE

OVERVIEW: Abstract Objectives Block diagram Implementation Details Advantages and Disadvantages Applications Future scope Conclusion and References

Implemented a home navigation system which comprises of a wheel chair which work on input such as gesture commands

Can be use by an elderly or physically challenged persons to move inside the home without any difficulty.

Equipped with obstacles avoidance technique.

It is a wheel chair which can be controlled by simple hand gesture.

It is virtue of the system that even the foot can be substituted in place of the hand for users who might find that more convenient.

ABSTRACT

OBJECTIVES The most common image of disability is the people in wheelchairs.

Wheelchairs are used by people who find themselves unequipped to move without external aid.

The physically challenged people, who use a normal wheelchair for navigation, usually require an external person to move around.

Here comes the need of an automated home navigation system, which consists of a wheelchair which can be used by the elderly and the physically challenged people without the help of an external person

The proposed project can be operated using the gestures of the provided android mobile phone.

The main concept involved is “Smartphone” which has an operating system as Android which have inbuilt 3 axis accelerometer and Bluetooth Wireless technology.

The aim of this project is to use wheelchair automatically for moving forward, backward, Left & Right. The overall wheelchair operation uses DC motor and motor driver module combines with microcontroller system.

The aim of this project is to controlling a wheel chair and electrical devices by using ACCELEROMETER SENSOR which is a highly sensitive sensor and capable of detecting the tilt.

BLOCK DIAGRAM

3 Axis Acceleration Sensor Board based on ADXL3XX from Analog devices is used for gesture recognition. It is a first generation 3 axis acceleration sensor.

User could get acceleration value of X, Y, and Z axis. And it is widely used in shock, slope, and moving detection. Output sensitivity could be select by simply set voltage level on few pins.

The output of the sensor is analog mode. A prototype chair is implemented with a small chair and 60rpm motors are used to move the chair. A free-wheel is arranged to change the chair direction according to user’s requirement.

This project uses 12V rechargeable battery. Speed and directions of the motors are measured by the accelerometer sensor.

Crystal oscillator produces a frequency of 11.0592 MHz for the microcontroller unit. H-bridge is a motor driver which drive the motors.

SOFTWARE USED Keil ver 5.0

Embedded ‘C’ Programming language

HARDWARE USEDThis Wheelchair uses dc motors 3-Axacceleration Sensor Microcontroller H-Bridge Bluetooth

8051-Microcontroller 4 KB ISP

128 x 8-bit Internal RAM32 Programmable I/O LinesTwo 16-bit Timer/Counters4.0V to 5.5V Operating Range

H-bridgeIt has 4 switching elements at the corners of the H and motors cross the cross bar.An H bridge is an electronic circuit that enables a voltage to be applied across

a load in either direction.

3-Axacceleration SensorAn accelerometer is an apparatus, either mechanical or electromechanical, for measuring acceleration or deceleration. that is, the rate of increase or decrease in the velocity of a moving object.

DC Motor

In this project we use simple DC motor for the rotation of the wheel which are responsible for the movement of the wheel chair.

BluetoothIt is a wireless technology standard for exchanging

data over short distances from fixed and mobile devices. It uses radio waves instead of wires or cables to

connect to a phone or Embedded systems.

It is built into billions of products on the market tody and connects internet of things

APPLICATIONS: In hospitals for handicapped patients.

It can be used by an elderly or physically challenged person to move inside the home without any difficulty.

ADVANTAGES Less expensive than the congenital automatic wheel chairs

Obstacle detection using IR sensors.

Capable of controlling the wheelchair motion for disabled people using hand gesture.

Front wheel drive provides high maneuverability.

DISADVANTAGES

Require smartphone for operation as accelerometer is themain device over which the main system is dependent.

Battery recharging is needed so smart phone battery and battery to drive the motor have to periodicallyrecharge and maintained

FUTURE SCOPE

Can also alarm the user about the obstacles

Improvements can be made using various body gestures like eye gaze, leg or hand movements

Movement can be controlled and location can be tracked.

Development of handicapped wheelchair using nervous system of human.

CONCLUSION

It is capable of controlling wheelchair motion for the disabled using hand gesture.

Various related work in the field of automated wheelchair.

The system was successfully implemented to move the wheelchair left, right,forward, backward or stay in the same position.

REFERENCE1. “Android Based Mobile Drive System”by Dr. Sheilfali Gupta, Anand

Bansal,Deeksha, Harshdeep Singh, Janender Bansal “International Journal of Electronics & Computer Science Engineering” Volume 3.

2. “Touch Screen Based Wheelchair System” by Vasundhara G.Posugade, Komal K.Shedge,Chaitali S.Tikhe“International Journal Of Engineering Research and Applications ” Volume 2,

3. A. Murarka, M. Sridharan and B.Kuipers. 2008. “Detecting obstacles and drop-offs using stereo and motion cues for safe local motion”.IEEE/RSJ Dept. of ECE @CITech,BangalorePage 4 International Conference on Intelligent Robots and Systems (IROS-08).

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