The recent technological advancements in sensor development, wireless communication, and computing have dramatically promoted research of new assistance technologies.
which is a wireless non-obtrusive tongue operated assistive technology for people with severe disabilities.
The tongue-operated assistive technology, called the Tongue Drive system, was described on June 29 at the 2008 Rehabilitation Engineering and Assistive Technology Society of North America (RESNA) Annual Conference in Washington, D.C. s.
A tiny magnet, only a size of a grain of rice, is attached to an individual's tongue using implantation, piercing or adhesive.
Scientists chose the tongue to control the system because the tongue and the brain has a direct connection through cranial nerve. In case when a person has a severe spinal cord injure or other damage, the tongue will remain mobile to activate the system.
In the TDS , a small permanent magnet the size of a grain of rice is secured to the tongue as a magnetic tracer by using tissue adhesives, simple implantation under the tongue mucosa through injection.
The magnetic field generated by the tracer inside and around the mouth varies as a result of the tongue movements.
These variations are detected by an array of sensitive magnetic sensors mounted on a headset outside the mouth, similar to a microphone mounted on a dental retainer inside the mouth,
The sensor outputs are wirelessly transmitted to a personal digital assistant (PDA).
A sensor signal processing(SSP) algorithm running on the PDA classifies the sensor signals and converts them into user control commands that are then wirelessly communicated to the targeted
The person who were completely unfamiliar with it.
30-minute explanation of the TDS operation, a 10-minute preparation period including attachment of the permanent magnet and adjustment of the face shield, and a 20-minute familiarization time to play with the system were enough for a new user .