Tactile sensitivity in ultrasonic haptics: Do different parts of hand and different rendering methods have an impact on perceptual threshold?
作者机构：Department of Communication EngineeringJilin UniversityJilin 130012China
出 版 物：《Virtual Reality & Intelligent Hardware》 (虚拟现实与智能硬件（中英文）)
年 卷 期：2019年第1卷第3期
页 面：265-275页
核心收录：
学科分类：08[工学] 0812[工学-计算机科学与技术（可授工学、理学学位）]
基 金：the National Key Research and Development Program(2016YFB1001304) and the National Natural Science Foundation of China(61631010)
主 题：Ultrasonic tactile Rendering methods Amplitude modulation Perceptual threshold Human-computer interaction
摘 要：Background Ultrasonic tactile representation utilizes focused ultrasound to create tactile sensations on the bare skin of a user s hand that is not in contact with a *** study is a preliminary investigation on whether different ultrasonic haptic rendering methods have an impact on the perceptual *** This study conducted experiments with the adaptive step method to obtain participants perceptual *** examine(1)whether different parts on the palm of the hand have different perceptual thresholds;(2)whether the perceptual threshold is different when the ultrasonic focus point is stationary and when it moves in different trajectories;(3)whether different moving speeds of the ultrasonic focus point have an influence on the perceptual threshold;and(4)whether the addition of a DC offset to the modulating wave has an impact on the perceptual *** The results show that the center of the palm is more sensitive to ultrasonic haptics than the fingertip;compared with a fast-moving focus point,the palm is more sensitive to a stationary and slow-moving focus *** the modulating wave has a DC offset,the palm is sensitive to a much smaller modulation *** For the future ultrasonic tactile representation systems,dynamic adjustment of intensity is required to compensate the difference in perceptual thresholds under different rendering methods to achieve more realistic ultrasonic haptics.
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