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Notice of retraction
Vol. 34, No. 8(3), S&M3042

Notice of retraction
Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
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Sensors and Materials, Volume 36, Number 3(4) (2024)
Copyright(C) MYU K.K.
pp. 1231-1241
S&M3594 Research Paper of Special Issue
https://doi.org/10.18494/SAM4864
Published: March 29, 2024

Bioelectromagnetic-response-based Input Interface for Mobile Devices —Finger Identification Using Bioimpedance Characteristics— [PDF]

Dairoku Muramatsu

(Received December 31, 2023; Accepted March 21, 2024)

Keywords: mobile device, input interface, finger identification, bioelectromagnetic response, bioimpedance

In this study, we realize a next-generation extended input interface that can identify the fingers used for operating mobile devices through bioelectromagnetic response sensing. First, the impedance characteristics of the five fingers were elucidated through an experiment involving different subjects. Furthermore, we discussed the possibilities of finger identification and subsequently focused on the differentiation between the thumb and the index finger. Next, we evaluated the differences between the bioimpedance characteristics of each finger for several subjects and clarified that the bioimpedance scale relation between fingers is the same for a particular subject. Moreover, the bioimpedance of a single subject was measured by letting the subject change the manner by which they hold a case or touch an electrode, and the results demonstrated that the bioimpedance characteristics of the thumb and index finger can be clearly distinguished even in discontinuous measurements. Finally, we implemented an identification algorithm in which the bioimpedance of the index finger from previous measurements was taken as the reference and performed evaluations to verify if a highly accurate differentiation of the thumb and index finger is possible. The results demonstrated that the proposed interface can be used in practical applications. Additionally, these findings highlight the potential of various applications utilizing bioelectromagnetic response sensing.

Corresponding author: Dairoku Muramatsu


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Cite this article
Dairoku Muramatsu, Bioelectromagnetic-response-based Input Interface for Mobile Devices —Finger Identification Using Bioimpedance Characteristics—, Sens. Mater., Vol. 36, No. 3, 2024, p. 1231-1241.



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