Highly Selective Biomimetic Flexible Tactile Sensor for Neuroprosthetics.
Highly Selective Biomimetic Flexible Tactile Sensor for Neuroprosthetics.
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用于神经修复术的高选择性仿生柔性触觉传感器
DOI：
10.34133/2020/8910692
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Zhang T
中科院分区：
文献类型：
--
作者：
Li Y;Cao Z;Li T;Sun F;Bai Y;Lu Q;Wang S;Yang X;Hao M;Lan N;Zhang T
仿生柔性触觉传感器赋予假肢操纵物体的能力，类似于人的手。然而，选择性地响应静态和滑动摩擦力仍然是一个巨大的挑战，这是与抓握过程中感知重量和滑动相关的关键触觉信息。在这里，受指纹结构和Ruffini末端对摩擦力的选择性响应的启发，我们开发了一种仿生柔性电容传感器，可以选择性地检测静态和滑动摩擦力。该传感器被设计成一种新型的平面并联电容器，其中银纳米线-三维聚二甲基硅氧烷（PDMS）电极以螺旋结构放置并垂直于衬底。银纳米线均匀分布在三维聚二甲基硅氧烷微柱表面，硅橡胶（Ecoflex®）作为介电材料。在不同的法向力作用下，传感器的电容几乎保持不变，但随着静摩擦力的增加而增加，当发生滑动时，传感器的电容减小。此外，针对神经假肢的滑动感知，设计了定制的信号编码电路，将电容信号转换为受施加滑动摩擦力调制的仿生脉冲信号。实验结果表明，这种具有触觉力方向和动态敏感性的仿生柔性传感器在智能神经修复术中具有很大的应用潜力。
Biomimetic flexible tactile sensors endow prosthetics with the ability to manipulate objects, similar to human hands. However, it is still a great challenge to selectively respond to static and sliding friction forces, which is crucial tactile information relevant to the perception of weight and slippage during grasps. Here, inspired by the structure of fingerprints and the selective response of Ruffini endings to friction forces, we developed a biomimetic flexible capacitive sensor to selectively detect static and sliding friction forces. The sensor is designed as a novel plane-parallel capacitor, in which silver nanowire–3D polydimethylsiloxane (PDMS) electrodes are placed in a spiral configuration and set perpendicular to the substrate. Silver nanowires are uniformly distributed on the surfaces of 3D polydimethylsiloxane microcolumns, and silicon rubber (Ecoflex®) acts as the dielectric material. The capacitance of the sensor remains nearly constant under different applied normal forces but increases with the static friction force and decreases when sliding occurs. Furthermore, aiming at the slippage perception of neuroprosthetics, a custom-designed signal encoding circuit was designed to transform the capacitance signal into a bionic pulsed signal modulated by the applied sliding friction force. Test results demonstrate the great potential of the novel biomimetic flexible sensors with directional and dynamic sensitivity of haptic force for smart neuroprosthetics.
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DOI：
10.1109/ojemb.2020.2981566
发表时间：
2020
影响因子：
5.8
作者：
Hao M;Chou CH;Zhang J;Yang F;Cao C;Yin P;Liang W;Niu CM;Lan N
通讯作者：
Lan N
影响因子：
56.9
作者：
Scheibert, J.;Leurent, S.;Debregeas, G.
通讯作者：
Debregeas, G.
影响因子：
19
作者：
Gerratt, Aaron P.;Michaud, Hadrien O.;Lacour, Stephanie P.
通讯作者：
Lacour, Stephanie P.
影响因子：
25
作者：
Osborn, Luke E.;Dragomir, Andrei;Thakor, Nitish V.
通讯作者：
Thakor, Nitish V.
DOI：
10.1088/0960-1317/20/12/125029
发表时间：
2010-12-01
影响因子：
2.3
作者：
Park, Yong-Lae;Majidi, Carmel;Wood, Robert J.
通讯作者：
Wood, Robert J.