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Large-Area, Crosstalk-Free, Flexible Tactile Sensor Matrix Pixelated by Mesh Layers
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-03-08 , DOI: 10.1021/acsami.0c21671
Kyubin Bae 1 , Jinho Jeong 1 , Jongeun Choi 1 , Soonjae Pyo 2 , Jongbaeg Kim 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-03-08 , DOI: 10.1021/acsami.0c21671
Kyubin Bae 1 , Jinho Jeong 1 , Jongeun Choi 1 , Soonjae Pyo 2 , Jongbaeg Kim 1
Affiliation
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Tactile sensor arrays have attracted considerable attention for their use in diverse applications, such as advanced robotics and interactive human–machine interfaces. However, conventional tactile sensor arrays suffer from electrical crosstalk caused by current leakages between the tactile cells. The approaches that have been proposed thus far to overcome this issue require complex rectifier circuits or a serial fabrication process. This article reports a flexible tactile sensor array fabricated through a batch process using a mesh. A carbon nanotube–polydimethylsiloxane composite is used to form an array of sensing cells in the mesh through a simple “dip-coating” process and is cured into a concave shape. The contact area between the electrode and the composite changes significantly under pressure, resulting in an excellent sensitivity (5.61 kPa–1) over a wide range of pressure up to 600 kPa. The mesh separates the composite into the arranged sensing cells to prevent the electrical connection between adjacent cells and simultaneously connects each cell mechanically. Additionally, the sensor shows superior durability compared with previously reported tactile sensors because the mesh acts as a support beam. Furthermore, the tactile sensor array is successfully utilized as a Braille reader via information processing based on machine learning.
中文翻译：
网格层像素化的大面积，无串扰，灵活的触觉传感器矩阵
触觉传感器阵列因其在各种应用中的使用而吸引了相当多的关注，例如高级机器人技术和交互式人机界面。然而，常规的触觉传感器阵列遭受由触觉单元之间的电流泄漏引起的电串扰。迄今为止已经提出的克服该问题的方法需要复杂的整流器电路或串行制造工艺。本文报告了通过使用网格的批处理过程制造的柔性触觉传感器阵列。碳纳米管-聚二甲基硅氧烷复合材料用于通过简单的“浸涂”工艺在网格中形成传感单元阵列，并固化成凹形。电极和复合材料之间的接触面积在压力下发生显着变化，从而具有出色的灵敏度（5.61 kPa–1）在高达600 kPa的压力范围内。网格将复合材料分隔成排列的传感单元，以防止相邻单元之间的电连接，并同时机械地连接每个单元。另外，与以前报道的触觉传感器相比，该传感器显示出卓越的耐用性，因为网孔充当支撑梁。此外，通过基于机器学习的信息处理，触觉传感器阵列已成功地用作盲文阅读器。
更新日期：2021-03-17
中文翻译：
网格层像素化的大面积，无串扰，灵活的触觉传感器矩阵
触觉传感器阵列因其在各种应用中的使用而吸引了相当多的关注，例如高级机器人技术和交互式人机界面。然而，常规的触觉传感器阵列遭受由触觉单元之间的电流泄漏引起的电串扰。迄今为止已经提出的克服该问题的方法需要复杂的整流器电路或串行制造工艺。本文报告了通过使用网格的批处理过程制造的柔性触觉传感器阵列。碳纳米管-聚二甲基硅氧烷复合材料用于通过简单的“浸涂”工艺在网格中形成传感单元阵列，并固化成凹形。电极和复合材料之间的接触面积在压力下发生显着变化，从而具有出色的灵敏度（5.61 kPa–1）在高达600 kPa的压力范围内。网格将复合材料分隔成排列的传感单元，以防止相邻单元之间的电连接，并同时机械地连接每个单元。另外，与以前报道的触觉传感器相比，该传感器显示出卓越的耐用性，因为网孔充当支撑梁。此外，通过基于机器学习的信息处理，触觉传感器阵列已成功地用作盲文阅读器。
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