Haptic sensation plays an important role in providing physical information to users in both real environments and virtual environments. To produce high-fidelity haptic feedback, various haptic devices and tactile rendering methods have been explored in myriad scenarios, and perception deviation between a virtual environment and a real environment has been investigated. However, the tactile sensitivity for touch perception in a virtual environment has not been fully studied; thus, the necessary guidance to design haptic feedback quantitatively for virtual reality systems is lacking. This paper aims to investigate users' tactile sensitivity and explore the perceptual thresholds when users are immersed in a virtual environment by utilizing electrovibration tactile feedback and by generating tactile stimuli with different waveform, frequency and amplitude characteristics. Hence, two psychophysical experiments were designed, and the experimental results were analyzed. We believe that the significance and potential of our study on tactile perceptual thresholds can promote future research that focuses on creating a favorable haptic experience for VR applications.

中文翻译：

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VR中电振动的触觉感知阈值

触觉在为真实环境和虚拟环境中的用户提供物理信息方面起着重要作用。为了产生高保真触觉反馈，已经在无数场景中探索了各种触觉设备和触觉渲染方法，并研究了虚拟环境和真实环境之间的感知偏差。然而，虚拟环境中触摸感知的触觉敏感性尚未得到充分研究；因此，缺乏为虚拟现实系统定量设计触觉反馈的必要指导。本文旨在通过利用电振动触觉反馈和产生不同波形的触觉刺激来调查用户的触觉灵敏度并探索用户沉浸在虚拟环境中时的感知阈值，频率和幅度特性。因此，设计了两个心理物理实验，并对实验结果进行了分析。我们相信我们对触觉感知阈值的研究的意义和潜力可以促进未来的研究，重点是为 VR 应用创造有利的触觉体验。