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Development of a Human-Display Interface with Vibrotactile Feedback for Real-World Assistive Applications

Authors
Kim, KidukJeong, Ji-HoonCho, Jeong-HyunKim, SunghyunKang, JeonggooRyu, JehaLee, Seong-Whan
Issue Date
1월-2021
Publisher
MDPI
Keywords
haptics; assistive technology; vibrotactile feedback; active touch; real-world environment
Citation
SENSORS, v.21, no.2, pp.1 - 17
Indexed
SCIE
SCOPUS
Journal Title
SENSORS
Volume
21
Number
2
Start Page
1
End Page
17
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/50630
DOI
10.3390/s21020592
ISSN
1424-8220
Abstract
It is important to operate devices with control panels and touch screens assisted by haptic feedback in mobile environments such as driving automobiles and electric power wheelchairs. A lot of consideration is needed to give accurate haptic feedback, especially, presenting clear touch feedback to the elderly and people with reduced sensation is a very critical issue from healthcare and safety perspectives. In this study, we aimed to identify the perceptual characteristics for the frequency and direction of haptic vibration on the touch screen with vehicle-driving vibration and to propose an efficient haptic system based on these characteristics. As a result, we demonstrated that the detection threshold shift decreased at frequencies above 210 Hz due to the contact pressure during active touch, but the detection threshold shift increased at below 210 Hz. We found that the detection thresholds were 0.30-0.45 gpeak with similar sensitivity in the 80-270 Hz range. The haptic system implemented by reflecting the experimental results achieved characteristics suitable for use scenarios in automobiles. Ultimately, it could provide practical guidelines for the development of touch screens to give accurate touch feedback in the real-world environment.
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