Basic Study on Automotive Warning Presentation to Front/Rear Danger by Vibrotactile Stimulation

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  • MURATA Atsuo
    Graduate School of Natural Science and Technology, Okayama University
  • KEMORI Susumu
    Graduate School of Natural Science and Technology, Okayama University
  • MORIWAKA Makoto
    Graduate School of Natural Science and Technology, Okayama University

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  • 前後の危険に対する自動車用触覚警報システムに関する基礎的研究
  • ゼンゴ ノ キケン ニ タイスル ジドウシャヨウ ショッカク ケイホウ システム ニ カンスル キソテキ ケンキュウ

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Abstract

The aim of this study was to improve driving safety using a vibrotactile warning system. The effectiveness of vibrotactile warning system was compared between the system that made use of apparent movement using 2-point stimuli and the system of single point stimulation. The participants were required to simultaneously carry out a tracking task, a switch pressing task, and a judgment task of information which randomly appeared on the front or the rear. The tracking error, the correct percentage of switch pressing, and the reaction time and the percentage correct reaction to the front or rear stimulus were measured. It was examined how age, the method of warning presentation (no warning, vibrotactile stimulation by apparent movement, and single-point vibrotactile stimulation), and the attachment location of tactors (arm, leg, and stomach/back) affected the measures above. It was confirmed that the tactile warning were effective for both young and older adults. The vibrotactile stimulation on leg led to higher hit rate, in particular, for older adults irrespective of the method of warning presentation. The warning presentation by vibrotactile apparent movement led to the slower reaction to the rear danger than the single-point vibrotactile stimulation.

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