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首页> 外文会议>2018 IEEE International Conference on Soft Robotics >Measurement of tissue stiffness using soft eGa-in sensors and pressure application
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Measurement of tissue stiffness using soft eGa-in sensors and pressure application

机译：使用软性eGa-in传感器和压力施加来测量组织刚度

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摘要

Modern prosthetic devices continue to improve their comfort, utility, and functionality with the advent of better manufacturing methods and understandings of human biomechanics. An essential aspect of any prosthetic is the custom fit needed to interface with the residual limb of an individual. Traditionally, these custom fit devices require professional revision and fitted interfaces created from materials that complement the geometry and composition of the residual limb. Soft, elastomeric sensors have the potential to measure tissue stiffness and create 4D models to produce these custom fit prosthetics without the need for traditional methods. For this study, soft sensors comprised of cast silicone (Ecoflex-0030) and liquid eutectic Gallium-Indium were designed to measure tissue stiffness at numerous locations on the body. Using 3D printed molds, two halves of each sensor were joined and liquid metal was injected between to create a highly elastic pressure-sensitive sensor. We demonstrated that a map of tissue stiffness can be generated when several of these sensors are deployed in an array and correlated to known positions on the body. This map can then be overlaid on a 3D scan to create a model for multi-material 3D printing. This approach could be used to generate custom, unique 3D printed prosthetic interfaces. If developed further and deployed in a full array, a diagnostic pressure cuff could be a versatile tool to any prosthetist or researcher studying tissue composition.
机译：随着更好的制造方法和对人体生物力学的了解，现代假体设备不断提高其舒适性，实用性和功能性。任何假肢的一个基本方面是与个体的残肢交接所需的自定义贴合性。传统上，这些定制合身设备需要进行专业修订，并使用补充残肢的几何形状和成分的材料制成合身界面。柔软的弹性传感器具有测量组织刚度的潜力，并可以创建4D模型来生产这些定制的修复体，而无需传统方法。对于这项研究，设计了由浇铸硅树脂（Ecoflex-0030）和液态共晶镓铟构成的软传感器，以测量人体多个部位的组织硬度。使用3D打印模具，将每个传感器的两半连接在一起，并在其间注入液态金属，以创建高弹性的压敏传感器。我们证明了当这些传感器中的几个以阵列形式部署并与身体上的已知位置相关时，可以生成组织刚度图。然后可以将此地图叠加在3D扫描上，以创建用于多材料3D打印的模型。此方法可用于生成自定义的，独特的3D打印假体界面。如果进一步开发并以完整阵列部署，诊断压力袖带对于任何研究组织成分的修复专家或研究人员而言，可能是一种多功能工具。

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