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Research on high definition tactile display based on the principle of tactile primary colors

基于触觉原色原理的高清触觉显示研究

基本信息

批准号：
15200007
负责人：
TACHI Susumu
金额：
$ 24.13万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

The main results of our research are as follows.(1)By measuring the frequency discrimination capability of the vibratory sensation that occurs by electric stimulus, we found out that we do not perceive stimulation frequency of more than 6OHz correctly, when we use anodic stimulation. This result suggests that the Pacinian corpuscle which is a receptor for high frequency vibration was not stimulated, which verified our principle of "tactile primary colors".(2)The new tactile display using the shape memory alloy matrix was realized. The aim was to realize dense presentation of pressure sensation, which is a weak point of an electrical stimulation. Moreover, to drive the display in minimum time, the control algorithm using the linear programming was newly proposed.(3)Feedback control of the stimulus current that uses the electric impedance information on the skin for stabilization of the feeling in an electric stimulus was performed.(4)In order to enable electrotactile stimulation to other parts of the body, the technique of diffusing current was proposed to prevent pain sensation. It was achieved by mounting a high resistance layer between the skin and an electrode.(5)The 64-point display for a fingertip and the 512-point display for forehead were designed and fabricated. In the visually-impaired school, the test is repeated as a sensory substitution system for a visually impaired person now.(6)By applying the experiment procedure followed in vision to a tactile sense, we found out that "Motion After Effect" in vision arose also in a tactile sense.

本文的主要研究结果如下：(1)通过测量电刺激产生的振动感觉的辨频能力，我们发现当我们使用阳极刺激时，我们不能正确感知超过6OHz的刺激频率。这一结果表明，作为高频振动感受器的太平洋小体没有受到刺激，验证了我们的“触觉原色”原理。(2)实现了基于形状记忆合金基体的新型触觉显示。目的是为了实现压感的密集呈现，这是电刺激的弱点。此外，为了在最短的时间内驱动显示，提出了基于线性规划的控制算法。(3)对刺激电流进行反馈控制，利用皮肤上的电阻抗信息来稳定电刺激的感觉。(4)为了实现对身体其他部位的电触觉刺激，提出了扩散电流技术来防止痛觉。它是通过在皮肤和电极之间安装一个高电阻层来实现的。(5)设计制作了64点指尖显示和512点额头显示。在视障学校，这个测试现在作为视障人士的感官替代系统重复进行。(6)将视觉上遵循的实验程序应用到触觉上，我们发现视觉上的“运动后效应”也会在触觉上产生。