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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Practical and Durable Flexible Strain Sensors Based on Conductive Carbon Black and Silicone Blends for Large Scale Motion Monitoring Applications
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Practical and Durable Flexible Strain Sensors Based on Conductive Carbon Black and Silicone Blends for Large Scale Motion Monitoring Applications

机译：基于导电炭黑和有机硅混合物的实用耐用的柔性应变传感器适用于大规模运动监控应用

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Presented is a flexible capacitive strain sensor, based on the low cost materials silicone (PDMS) and carbon black (CB), that was fabricated by casting and curing of successive silicone layers—a central PDMS dielectric layer bounded by PDMS/CB blend electrodes and packaged by exterior PDMS films. It was effectively characterized for large flexion-angle motion wearable applications, with strain sensing properties assessed over large strains (50%) and variations in temperature and humidity. Additionally, suitability for monitoring large tissue deformation was established by integration with an in vitro digestive model. The capacitive gauge factor was approximately constant at 0.86 over these conditions for the linear strain range (3 to 47%). Durability was established from consistent relative capacitance changes over 10,000 strain cycles, with varying strain frequency and elongation up to 50%. Wearability and high flexion angle human motion detection were demonstrated by integration with an elbow band, with clear detection of motion ranges up 90°. The device’s simple structure and fabrication method, low-cost materials and robust performance, offer promise for expanding the availability of wearable sensor systems.
机译：展示了一种基于低成本材料有机硅（PDMS）和炭黑（CB）的柔性电容应变传感器，该传感器通过浇铸和固化连续的有机硅层（由PDMS / CB混合电极和由外部PDMS薄膜包装。它已针对大型屈角运动可穿戴应用进行了有效表征，并在大应变（50％）以及温度和湿度变化的情况下评估了应变传感特性。另外，通过与体外消化模型整合，建立了监测大组织变形的适用性。在这些条件下，线性应变范围内（3％至47％），电容应变系数大约恒定为0.86。持久性是通过在10,000个应变周期内保持一致的相对电容变化而建立的，其中应变频率和变化率高达50％。通过与肘带的集成，证明了可穿戴性和高屈曲角度人体运动检测功能，可清晰检测高达90°的运动范围。该设备的简单结构和制造方法，低成本的材料以及强大的性能，为扩展可穿戴传感器系统的可用性提供了希望。

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