Hyper-connected Basic Technology Research Division, Electronics and Telecommunications Research Institute, Gajung-ro 218, Yusung-gu Daejeon 34129, Korea.
Department of computer science, KoreaTech University, Choongjeol-ro 1600, Byungcheong-myun, Cheonan 31253, Korea.
Sensors (Basel). 2018 Dec 22;19(1):44. doi: 10.3390/s19010044.
In this paper, we propose a smart insole for inexpensive plantar pressure sensing and a simple visualizing scheme. The insole is composed of two elastomeric layers and two electrode layers where the common top electrode is submerged in the insole. The upper elastomeric layer is non-conductive poly-dimethyl-siloxane (PDMS) and supports plantar pressure buffering and the lower layer is carbon nano-tube (CNT)-dispersed PDMS for pressure sensing through piezo-resistivity. Under the lower sensing layer are 16 bottom electrodes for pressure distribution sensing without cell-to-cell interference. Since no soldering or sewing is needed the smart insole manufacturing processes is simple and cost-effective. The pressure sensitivity and time response of the material was measured and based on the 16 sensing data of the smart insole, we virtually extended the frame size for continuous and smoothed pressure distribution image with the help of a simple pseudo interpolation scheme.
本文提出了一种用于廉价足底压力感测的智能鞋垫和一种简单的可视化方案。该鞋垫由两层弹性体和两层电极层组成，其中公共顶层电极浸没在鞋垫中。上层弹性体为非导电聚二甲基硅氧烷（PDMS），用于缓冲足底压力，下层为碳纳米管（CNT）分散的 PDMS，通过压阻效应进行压力感测。在下层传感层下有 16 个底部电极，用于无单元间干扰的压力分布感测。由于不需要焊接或缝纫，智能鞋垫的制造工艺简单且具有成本效益。测量了材料的压力灵敏度和响应时间，并基于智能鞋垫的 16 个感测数据，借助简单的伪插值方案，虚拟扩展了帧大小，以获得连续和平滑的压力分布图像。
