Design and characterization of an EOG signal acquisition system based on the programming of saccadic movement routines

Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

Authors

  • Luis A. Frem-Sosa
  • Mónica Valenzuela-Delgado
  • Wendy Flores-Fuentes
  • Julio C. Rodríguez-Quiñonez
  • Oleg Sergiyenko
  • Daniel Hernández-Balbuena
  • Fabián N. Murrieta-Rico
  • Jesús E. Miranda-Vega
  • Paolo Mercorelli

It is estimated that by 2030 the number of people with disabilities will rise, thereby increasing the demand for assistive devices. Eye tracking has served as an alternative for the development of assistive technologies. Electrooculography (EOG) is an eye tracking technique used to measure the eye's electrical activity. In this work, an AC-coupled EOG acquisition system composed of an instrumentation amplifier, low-pass, high-pass, and notch filters was designed. A graphical user interface (GUI) with programmed routines was made in order to characterize the system by the performance of saccadic eye movements. The peaks of the EOG signals in the horizontal and vertical directions at different viewing angles were analyzed to establish a relation between peak magnitude and gaze angle. Due to eye blinking, amplifier saturation, and subject fatigue, the vertical EOG was discarded for system characterization. A linear relationship was obtained between the horizontal EOG magnitude and the horizontal gaze angles in a range from 9.4° to 39.7°, with a coefficient of determination of 0.9991. The proposed EOG system is linear in the horizontal direction; however, DC coupling of the system is sought in a future stage to improve the characterization of eye movements.

Original languageEnglish
Title of host publication2023 IEEE 32nd International Symposium on Industrial Electronics, ISIE 2023 : Proceedings
Number of pages5
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers Inc.
Publication date19.06.2023
Pages1-5
ISBN (print)979-8-3503-9972-1
ISBN (electronic)979-8-3503-9971-4
DOIs
Publication statusPublished - 19.06.2023
Event32nd IEEE International Symposium on Industrial Electronics, ISIE 2023 - Aalto Universität , Helsinki, Finland
Duration: 19.06.202321.06.2023
https://2023.ieee-isie.org

Bibliographical note

Publisher Copyright:
© 2023 IEEE.

    Research areas

  • Assistive technology, electrooculography (EOG), routines., saccadic eye movement
  • Engineering

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