Highly stretchable sensing array for independent detection of pressure and strain exploiting structural and resistive control
Highly stretchable sensing array for independent detection of pressure and strain exploiting structural and resistive control
复制标题
利用结构和电阻控制实现压力和应变独立检测的高度可伸缩传感阵列
DOI：
10.1038/s41598-020-69689-2
复制
发表时间：
2020-07-29
影响因子：
4.6
通讯作者：
Ota, Hiroki
中科院分区：
文献类型：
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作者：
Matsuda, Ryosuke;Mizuguchi, Satoru;Ota, Hiroki
可拉伸物理传感器对于先进电气系统的开发至关重要，特别是可穿戴设备和软机器人。目前可用的检测压力和应变的可拉伸传感器基于压电、压阻或压容效应。压力感测的范围是1-800 kPa，其中大的变形在人体的部分（例如肘部和膝盖）的变形范围内。然而，这些装置不能容易地允许在大张力（>50%）下用传感器阵列同时且独立地检测压力和应变，因为应变影响压力信号。在这项研究中，我们提出了一个单片硅基阵列的压力和应变传感器，可以同时和独立地检测面内双轴拉伸变形和压力。为了实现这些功能，使用由具有不同硬度特性的两种类型的有机硅和多孔有机硅体制成的杂有机硅基板来优化器件结构的变形。此外，通过调整基于碳纳米颗粒的混合物来控制传感器的电阻，以提高压力和应变传感器之间的灵敏度和独立性。这些概念证明了这种方法的潜力及其与当前可拉伸物理传感器架构的兼容性。
Stretchable physical sensors are crucial for the development of advanced electrical systems, particularly wearable devices and soft robotics. Currently available stretchable sensors that detect both pressure and strain are based on piezoelectric, piezoresistive, or piezocapacitive effects. The range of pressure sensing is 1-800 kPa with large deformations being within the range of deformations of parts of the human body, such as elbows and knees. However, these devices cannot easily allow simultaneous and independent detection of pressure and strain with sensor arrays at large tensions (>50%) because strain affects the pressure signal. In this study, we propose a monolithic silicone-based array of pressure and strain sensors that can simultaneously and independently detect the in-plane biaxial tensile deformation and pressure. To realize these functionalities, the deformation of the device structure was optimized using a hetero-silicone substrate made of two types of silicone with different hardness characteristics and porous silicone bodies. In addition, the resistances of the sensors were controlled by adjusting a mixture based on carbon nanoparticles to improve the sensitivity and independence between the pressure and strain sensors. These concepts demonstrate the potential of this approach and its compatibility with the current architectures of stretchable physical sensors.