title: An arch-shaped intraoral tongue drive system with built-in tongue-computer interfacing SoC.
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.
authors.affiliation: GT-Bionics Lab, Georgia Institute of Technology, 85 Fifth St. NW, Atlanta, GA 30308, USA. hpark90@gatech.edu.
authors.forename: Hangue
authors.initials: H
authors.lastname: Park
authors.affiliation: GT-Bionics Lab, Georgia Institute of Technology, 85 Fifth St. NW, Atlanta, GA 30308, USA. mgh@gatech.edu.
authors.forename: Maysam
authors.initials: M
authors.lastname: Ghovanloo
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D008280:Magnetics / Q000295:instrumentation*; D059346:Magnets; D008328:Man-Machine Systems; D011187:Posture / Q000502:physiology; D012656:Self-Help Devices; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D018511:Systems Integration; D014059:Tongue / Q000502:physiology*; D014159:Transducers; D014584:User-Computer Interface; D059015:Wireless Technology / Q000295:instrumentation*