Electropneumotactile Stimulation: Multimodal Haptic Actuators Enabled by a Stretchable Conductive Polymer on Inflatable Pockets
Electropneumotactile Stimulation: Multimodal Haptic Actuators Enabled by a Stretchable Conductive Polymer on Inflatable Pockets
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DOI：
10.1002/admt.201901119
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发表时间：
2020-05-05
影响因子：
6.8
通讯作者：
Lipomi, Darren J.
中科院分区：
文献类型：
--
作者：
Carpenter, Cody W.;Malinao, Marigold G.;Lipomi, Darren J.
描述了一种类型的触觉设备，其同时并且在皮肤上的相同位置处递送两种模式的刺激。刺激的两种模式是机械的（通过嵌入在硅橡胶弹性体中的可充气气囊释放）和电的（通过导电聚合物释放）。这项工作的关键使能方面是使用基于聚（3，4-亚乙二氧基噻吩）（PEDOT）与弹性体聚氨酯（PU）共混的高增塑导电聚合物。为了制造“电-气-触觉”装置，聚合物电极直接覆盖在弹性气动致动器袋的顶部。气动致动器和电触觉电极的共同放置通过PEDOT：甲苯磺酸盐/PU共混物的可拉伸性实现，从而允许电触觉电极在变形下符合下面的气动袋。PEDOT和PU的共混物具有约150 MPa的杨氏模量，在气囊的重复充气之后电导率几乎没有降低。使用人类受试者的实验支持感知两种感觉同时传递到皮肤上相同位置的能力。这些结果表明，参与者可以成功地检测气动刺激的位置，以及是否以显著高于机会的速率（平均准确度= 94%）提供电触觉刺激（是/否）。
A type of haptic device is described that delivers two modes of stimulation simultaneously and at the same location on the skin. The two modes of stimulation are mechanical (delivered pneumatically by inflatable air pockets embedded within a silicone elastomer) and electrical (delivered by a conductive polymer). The key enabling aspect of this work is the use of a highly plasticized conductive polymer based on poly(3,4-ethylenedioxythiphene) (PEDOT) blended with elastomeric polyurethane (PU). To fabricate the "electropneumotactile" device, the polymeric electrodes are overlaid directly on top of the elastomeric pneumatic actuator pockets. Co-placement of the pneumatic actuators and the electrotactile electrodes is enabled by the stretchability of the PEDOT:tosylate/PU blend, allowing the electrotactiles to conform to underlying pneumatic pockets under deformation. The blend of PEDOT and PU has a Young's modulus of approximate to 150 MPa with little degradation in conductivity following repeated inflation of the air pockets. The ability to perceive simultaneous delivery of two sensations to the same location on the skin is supported by experiments using human subjects. These results show that participants can successfully detect the location of pneumatic stimulation and whether electrotactile stimulation is delivered (yes/no) at a rate significantly above chance (mean accuracy = 94%).