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Sensors 2014, 14(11), 21565-21587; doi:10.3390/s141121565

An Arch-Shaped Intraoral Tongue Drive System with Built-in Tongue-Computer Interfacing SoC

GT-Bionics Lab, Georgia Institute of Technology, 85 Fifth St. NW, Atlanta, GA 30308, USA
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Received: 18 September 2014 / Revised: 10 November 2014 / Accepted: 11 November 2014 / Published: 14 November 2014
(This article belongs to the Special Issue Miniaturized Wireless Biosensors)
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Abstract

We present a new arch-shaped intraoral Tongue Drive System (iTDS) designed to occupy the buccal shelf in the user’s mouth. The new arch-shaped iTDS, which will be referred to as the iTDS-2, incorporates a system-on-a-chip (SoC) that amplifies and digitizes the raw magnetic sensor data and sends it wirelessly to an external TDS universal interface (TDS-UI) via an inductive coil or a planar inverted-F antenna. A built-in transmitter (Tx) employs a dual-band radio that operates at either 27 MHz or 432 MHz band, according to the wireless link quality. A built-in super-regenerative receiver (SR-Rx) monitors the wireless link quality and switches the band if the link quality is below a predetermined threshold. An accompanying ultra-low power FPGA generates data packets for the Tx and handles digital control functions. The custom-designed TDS-UI receives raw magnetic sensor data from the iTDS-2, recognizes the intended user commands by the sensor signal processing (SSP) algorithm running in a smartphone, and delivers the classified commands to the target devices, such as a personal computer or a powered wheelchair. We evaluated the iTDS-2 prototype using center-out and maze navigation tasks on two human subjects, which proved its functionality. The subjects’ performance with the iTDS-2 was improved by 22% over its predecessor, reported in our earlier publication. View Full-Text
Keywords: Intraoral Tongue Drive System (iTDS); assistive technology; brain-tongue-computer interface; system-on-a-chip; magnetic sensors; buccal shelf Intraoral Tongue Drive System (iTDS); assistive technology; brain-tongue-computer interface; system-on-a-chip; magnetic sensors; buccal shelf
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Park, H.; Ghovanloo, M. An Arch-Shaped Intraoral Tongue Drive System with Built-in Tongue-Computer Interfacing SoC. Sensors 2014, 14, 21565-21587.

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