Non-linearity of Skin Properties in Electrotactile Applications: Identification and Mitigation.
Non-linearity of Skin Properties in Electrotactile Applications: Identification and Mitigation.
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DOI：
10.1109/access.2019.2955648
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Shen Y
中科院分区：
文献类型：
--
作者：
Rahimi M;Jiang F;Shen Y
电触觉显示器可以打开一条新的感官替代通道，用于广泛的应用领域。我们的指眼研究使用这种方法为盲人建立了一个系统，让他们可以轻松阅读任何不是用盲文写的文本。但在这类系统的不同方面仍存在挑战。最关键的问题之一是受体疲劳的影响。我们的测试表明，在感受器长时间接触电信号的过程中，它们对信号电平的敏感度会逐渐变化，需要调整信号的功率来保持感受器处于刺激状态。通过监测流经皮肤的电流并计算相应的阻抗，证实了这一点。更有趣的是，阻抗的变化率对于皮肤的每个部分是不同的，这表明皮肤的每个区域的感受器疲劳率是不一致的。在这项研究中，皮肤的这些电特性被解决，目的是为用户呈现一致的感觉，而不考虑人或皮肤状况。为了解决这些挑战，采用了两种方法：使用基于脉宽调制的电压控制系统来调整信号功率；使用卡尔曼滤波来提前预测阻抗变化并为皮肤提供合适的信号。其结果是一个独立的自动化系统，能够在任何给定的时间或皮肤状况下管理任何用户的信号功率。
Electrotactile displays can open a new sensory substitution channel to be utilized in a vast array of applications. Our Finger-Eye research used this approach to build a system for the blind to easily read any text not written in Braille. But there are still challenges in different aspects of such systems. One of the most crucial concerns, is the effects of receptor fatigue. Our tests show that during prolonged exposure of receptors to the electrical signals, their sensitivity to the signal level changes gradually and adjustments in the signal’s power are required to keep the receptors is the stimulated state. This was confirmed by monitoring the electrical current passing through the skin and calculating the corresponding impedance. More interestingly, the rates of the impedance changes are different for each part of the skin, indicating inconsistent rates of receptor fatigue for each region of the skin. These electrical properties of the skin were addressed in this research for the purpose of rendering consistent sensations for the users regardless of the person or skin conditions. To solve these challenges, two methods are employed: a voltage control system based on pulse-width modulation is used to adjust the signal power; and Kalman filtering is used to predict impedance changes in advance and supply the skin with the proper signal. The result is a self-contained automated system capable of managing the signal power for any user at any given time or skin condition.
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DOI：
10.1109/tnsre.2017.2702628
发表时间：
2017-11
期刊：
IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society
影响因子：
--
作者：
Kaczmarek KA;Tyler ME;Okpara UO;Haase SJ
通讯作者：
Haase SJ
DOI：
10.1002/ecjb.10056
发表时间：
2002-01-01
期刊：
ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS
影响因子：
--
作者：
Kajimoto, H;Kawakami, N;Tachi, S
通讯作者：
Tachi, S
影响因子：
10.8
作者：
Prausnitz, MR
通讯作者：
Prausnitz, MR
影响因子：
1.8
作者：
Danilov, Yuri;Tyler, Mitchell
通讯作者：
Tyler, Mitchell
影响因子：
2.9
作者：
Moritz J Jr;Turk P;Williams JD;Stone-Roy LM
通讯作者：
Stone-Roy LM