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A Low Cost Bidirectional Human-Computer Interface. Authors: Alexey Borisenko, Lukash Monczak, Ikvir S Samra, Ovidiu Draghici, Daniel Shapiro, Voicu Groza. CARG 2010. Overview. Objectives Motivation Neuroplasticity HCI state-of-art Approach Results Conclusion & Future work.

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a low cost bidirectional human computer interface

A Low Cost Bidirectional Human-Computer Interface

Authors: Alexey Borisenko, Lukash Monczak, Ikvir S Samra, Ovidiu Draghici, Daniel Shapiro, Voicu Groza

overview
CARG 2010Overview
  • Objectives
  • Motivation
  • Neuroplasticity
  • HCI state-of-art
  • Approach
  • Results
  • Conclusion & Future work

carg.site.uottawa.ca

objectives
CARG 2010Objectives
  • Non-invasive bidirectional human-computer interface
  • Low-cost (< $20)
  • Faster training time

carg.site.uottawa.ca

motivation
CARG 2010Motivation
  • HCI devices used by hospitals to alleviate suffering of patients that have lost vision, balance, or mobility.
  • HCI devices very expensive
  • Neuroplasticity

mclasen.com

carg.site.uottawa.ca

neuroplasticity
CARG 2010Neuroplasticity

Property of the brain to reorganize itself

  • Phantom limbs
  • Treatment of brain damage
  • Treatment of learning difficulties

brainline.org

carg.site.uottawa.ca

hci state of art
CARG 2010HCI State-of-art
  • Brainport [Danilov05]
  • BCI 2000 [Schalk08]
  • BCCI[Walter09]
  • Oral Tactile Interface[Tang06]

gtec.at

periodistadigital.com

met.usc.edu

carg.site.uottawa.ca

approach taken
CARG 2010Approach taken

Designed Prototype (BHCI):

VGA

Serial Data

Human

FPGA

TDU

Balance

Data*

Pushbuttons

*Wicab has applied for provisional patents for the use of balance data for TDUs.

carg.site.uottawa.ca

tongue display unit tdu
CARG 2010Tongue Display Unit (TDU)
  • A TDU actuates signals onto the tongue using an electrode array
  • Data is received by the brain and interpreted
  • Signals such as balance [Danilov05] and tactile information [Tang06] are observed

carg.site.uottawa.ca

advantages
CARG 2010Advantages
  • Low cost
  • Simple architecture
  • Flexible software

carg.site.uottawa.ca

safety issues and considerations
CARG 2010Safety Issues and Considerations

Murphy and His Law

  • We naturally assume that any system plugged into the wall should not be connected to a person.
  • No Human Testing, Not Yet
  • For now we are doing testing with a digital oscilloscope and a multimeter.
  • Wireless is the Future
  • [Danilov05] and [Tang06], started with wired designs and left wireless as future work.

carg.site.uottawa.ca

computer human interface
CARG 2010Computer-Human Interface

Sensory Perception

  • What humans feel

carg.site.uottawa.ca

computer human interface1
CARG 2010Computer-Human Interface

Actuating Signals Onto the Tongue

  • 12th cranial nerve [Lin09].
  • Resistance of tongue [Faes99].
  • Approaches to signal actuation:
    • Capacitive conductor (grayscale)
    • Time multiplexing (row, column)
    • Roof of the mouth [Tang06]
    • Surface of tongue (BHCI, Brainport)

carg.site.uottawa.ca

results
CARG 2010Results

Low Cost and Proper Operation

The design does not go near the current limit and was designed with very low cost components. *

*http://www.youtube.com/user/uottawaBHCI#p/a/u/0/Sm0DINKrUHg

carg.site.uottawa.ca

conclusion future work
CARG 2010Conclusion & Future work

A low cost HCI was designed, implemented, and tested in the lab.

  • Human testing may follow, eventually.
  • Open collector ICs are required to fix fluctuating output voltage.
  • An upgrade to wireless is needed to approval for human testing.
  • Cleaning protocol
  • Plastic sealant

carg.site.uottawa.ca

references
References
  • [Danilov05] Y. Danilov and M. Tyler, “Brainport: an alternative input to the brain.”

Journal of integrative neuroscience, vol. 4, no. 4, p. 537, 2005.

  • [Tang06] H. Tang and D. Beebe, “An oral tactile interface for blind navigation,”

Neural Systems and Rehabilitation Engineering, IEEE Transactions on, vol. 14, no. 1, pp. 116 –123, march 2006.

  • [Lin09] H. Lin, P. Barkhaus, “Cranial Nerve XII: The Hypoglossal Nerve”, Seminars in Neurology, vol. 29, no. 1, p.45-52.
  • [Faes99] T. J. C. Faes, H. A. van der Meij, J. C. de Munck, and R. M.

Heethaar, “The electric resistivity of human tissues (100 hz-10 mhz): a meta-analysis of review studies,” Physiological Measurement, vol. 20, no. 4, p. R1, 1999.

  • [Borisenko10] A.Borisenko, L. Monczak, I. S. Samra, O. Draghici, D. Shapiro, V. Groza, “A Low Cost Bidirectional Human-Computer Interface,” Medical Measurements and Applications (MeMeA), Apr. 2010.
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