An Arch-Shaped Intraoral Tongue Drive System with Built-in Tongue-Computer Interfacing SoCReport as inadecuate




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GT-Bionics Lab, Georgia Institute of Technology, 85 Fifth St. NW, Atlanta, GA 30308, USA





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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





Author: Hangue Park and Maysam Ghovanloo *

Source: http://mdpi.com/



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