Patent Pending
Patent Application No: 3209/MUM/2013
Project Description
Wheelchair is used to provide a mode of transportation for such disabled people with impairments in hands and legs. People with such issues like paralytic people find it difficult to operate the wheelchair manually or using a remote assembly. For such people the project is designed to work on voice based commands so that the paralytic or disabled person can give direction commands by just speaking into the microphone given. The system also controlled by the head movement and joystick. It also has obstacle detection sensor which stops the wheelchair if any person/object comes in front of wheelchair.
Working
The system consist of an Atmega32 based circuit interfaced with an voice recognition module that takes speech commands from the user converts this speech into digital data which is then debugged by the micro-controller to get directional commands. A BLDC motors are uses to drive the wheelchair. An ultrasonic sensor are used for obstacle detection and accelerometer is used for gesture detection. A touchscreen is provided for setting the wheelchair parameters like wheelchair speed, changing the operating mode and to indicate the status like which side obstacle sensor is triggered. The system is powered using lead acid battery.
The user can program the wheelchair voice command in any language. Currently the voice commands are programmed in Marathi language.
Specifications
- Controlling: Voice Command, Gesture Control, Joystick Control, Touch screen control.
- Obstacle detection.
- Voice module (HM2007)
- Atemga32 / TI Controller
- 48V BLDC Motor
- 48V Lead Acid Battery
- Gesture Sensor: ADXL335 Accelerometer
- Obstacle Sensor: HC-SR04 Ultrasonic Sensor.
- Display: 128x 64 Graphical display.
- Touch: 4 wire Resistive touch