Tongue driven wireless assistance technology for wheelchair movement

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2017 by IJETT Journal
Volume-49 Number-6
Year of Publication : 2017
Authors : Vrunda Adkar, Sachin Bhat, Krishna Kumar P, Shareen Noronha, Chetan R
DOI :  10.14445/22315381/IJETT-V49P252


Vrunda Adkar, Sachin Bhat, Krishna Kumar P, Shareen Noronha, Chetan R "Tongue driven wireless assistance technology for wheelchair movement", International Journal of Engineering Trends and Technology (IJETT), V49(6),345-347 July 2017. ISSN:2231-5381. published by seventh sense research group

Persons with severe disabilities as a result of spinal cord injuries and quadriplegia find it extremely difficult to carry out their daily work independently. These individuals completely depend on wheeled mobility for transportation in and out of their homes. The main principle behind the project is to help these people. It intends in the usage of unconstrained motion of tongue as its movements are fast and do not require much of thinking concentration or effort. Tongue being hidden inside mouth will give a high degree of privacy and is directly connected to brain. The key components of the project are three Hall-Effect sensors, a permanent magnet, microcontroller ATmega328, RF module, Encoder HT12E, Decoder HT12D, H-bridge driver, DC motor. A tiny permanent magnet is secured on the tongue and three Hall-Effect sensors are placed on the monkey cap, outside the mouth. Three Hall-Effect sensors are used for three directions of wheelchair motion i.e, left, right and forward. When a magnet is brought near any one of the sensor, the corresponding movement of wheelchair takes place. The sensor generates an analog signal which will be digitalized using ADC. Digitalized data is sent to encoder and then to RF transmitter. Transmitter section, which consists of encoder and RF transmitter, is placed on neck of the paralysed person. The signal is sent wirelessly, which is received by the RF receiver. Then it is decoded and sent to microcontroller. Microcontroller is programmed to drive a motor in a particular direction. Since the output of microcontroller is not enough to run the motor, H-bridge driver is used to drive the motor. Receiver section consisting of RF receiver, decoder, microcontroller and H-bridge driver is kept beneath the wheelchair. This device helps the individuals to become independent and lead productive lives.

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Hall effect Sensor, RFID module, wheelchair