This document describes a direction controlled wheelchair for physically disabled people using voice control and an RF module. The wheelchair can be controlled through voice commands to a voice recognition module or through an RF remote. It also monitors the user's temperature and detects obstacles using sensors. The system uses a PIC microcontroller, voice recognition module, RF transmitter/receiver, temperature sensor, IR obstacle sensor, motor driver, and LCD display. The goal is to allow disabled individuals to move independently through voice or remote control while also monitoring their health conditions.

1. DIRECTION CONTROLLED WHEEL CHAIR FOR PHYSICALLYDIRECTION CONTROLLED WHEEL CHAIR FOR PHYSICALLY
DISABLED BASED ON VOICE AND RF MODULEDISABLED BASED ON VOICE AND RF MODULE
PROJECT SUPERVISOR
Mr.S.Sundar
(Assistant Professor)
PRESENTED BY
J.JEGADEESH(121EE505)
S.JAGADEESH(111EE133)
V.SURENDAR(121EE524)

2. Project Phase -2
ABSTRACT
 This Project describes an intelligent motorized
wheel chair for physically disabled person
using voice control and by RF module. It
enables a disabled person to move around
independently using a voice recognition
application which is interfaced with motors
through microcontroller.

3. Project Phase -2
INTRODUCTION
 This work includes the wheelchair that can be
controlled by using voice and switch and it
monitors the body temperature of the disabled
person.

4. Project Phase -2
PROBLEM IDENTIFICATION
 The present world the medical field gives very
much importance in taking care of the patients, and
the patient/ handicapped one are like to live
individually without the help of any others .so, this
proposed product will be very effective for them.

5. Project Phase -2
OBJECTIVE
 To design a working model that could help the
physically disabled persons and to make a system
that monitors the health condition of patient.

6. Project Phase -2
BLOCK DIAGRAM OF PROPOSED WORK
MICROPHONE
VOICE
RECOGNITION
KIT
RF MODULE
PIC
CONTROLLER
IR OBSTACLE
SENSOR
POWER
SUPPLY
RELAY 1
RELAY 2
TEMP
SENSOR
MOTOR 1
MOTOR 2
LCD
DISPALY

7. DESIGN AND DEVELOPMENT
 The wheel chair is controlled by voice recognition
module and the vehicle is also controlled from a
short distance through RF module.
Project Phase -2

8. Project Phase -2
CIRCUIT DIAGRAM

9. Project Phase -2
HARDWARE COMPONENTS
 PIC 16F877A
 VOICE RECOGNITION HM2007 KIT
 POWER SUPPLY
 RF MODULE
 IR OBSTACLE SENSOR
 LCD DISPLAY
 TEMPERATURE SENSOR
 RELAY
 DC GEAR MOTOR

10. MICROCONTROLLER PIC 16F877A
Project Phase -2

11. FEATURES
 It is an 8bit microcontroller.
 35 input/output pins
 368 bytes RAM memory
 A/D converter
Project Phase -2

12. HM2007-VOICE RECOGNITION LSI KIT
Project Phase -2

13. MICROPHONE
 The human ear has an auditory range from 10 to
15,000 Hz. Microphones are transducers which
detect sound signals and produce an electrical
signal.
 Microphone takes the analog voice commands and
sends it to voice recognition chip HM 2007.
Project Phase -2

14. FEATURES
 The HM2007 is a CMOS voice recognition LSI
circuit. The chip contains voice analysis,
regulation, and system control functions. The main
features are speech recognition circuit, maximum
40 word recognition, microphone support, response
time is less than 300 milliseconds.
Project Phase -2

15.  User programmable, Up to 20 word vocabulary of
duration two second,non-volatile memory back up
with 3V battery onboard, which keep the speech
recognition data in memory even after power off.
Project Phase -2

16. RF MODULE
Project Phase -2

17. RF MODULE
*An RF module (radio frequency module) is a
(usually) small electronic device used to transmit
and/or receive radio signals between two devices.
*RF communications incorporate a transmitter and
a receiver.
Project Phase -2

18. RF TRANSMITTER
Project Phase -2

19. RF RECEIVER
Project Phase -2

20. SENSORS
 And for checking body condition and movement
of the patient different sensors such as temperature,
obstacle sensor(IR)are used.
 The results of sensors are displayed in the LCD.
Project Phase -2

21. SENSORS –Temperature sensor
Project Phase -2

22.  The TMP35/TMP36/TMP37 are low voltage,
precision centigrade temperature sensors. They
provide a voltage output that is linearly
proportional to the Celsius (centigrade)
temperature
Project Phase -2

23. Detecting Obstacle with IR (Infrared) Sensor
Project Phase -2

24. TEMPERATURE SENSOR AND IR
SENSOR
Project Phase -2

25. RELAY DRIVER CIRCUIT
Project Phase -2

26. OVERALL PROJECT MODEL
Project Phase -2

27. Project Phase -2
HARDWARE IMPLEMENTATION

28. Project Phase -2
CONCLUSION
 The direction of the wheelchair can be selected
using the specified voice commands or switch.
This project has many advantages like safety,
comfort, energy saving, etc. Thus a trained voice is
only needed to ride the wheelchair.

29. FURTHER DEVELOPMENT
 Further the project can be developed by using a
heart beat analyzer sensor to sense the heart beat of
the patient. When heart beat is crossing the
threshold value SMS is sent to the concern
person/doctor via GSM. The short range
controlling of wheel chair is also possible via
zigbee. We can implement our project on PCB and
output can be obtained.
Project Phase -2

30. Project Phase -2
REFERENCES
 [1]. A. AnandKumar “BasicFundamentals of
Digital Circuits” Second Ed. PHI Learning.
 [2]. Neamen“Electronic Circuits – Analysis &
Design” McGraw Hill.
 [3]. Millman J. &Taub H., “Pulse, Digital &
Switching Waveforms” Tata McGraw Hill
 [4]. Simon Haykin, “Communication
Systems”Wiley India, New Delhi, 4Ed. 2008