Distributed Sensing for Prosthetic Sockets

假肢接受腔的分布式传感

• 批准号: 7383572
• 负责人: ALEXANDER V MAMISHEV
• 金额: $ 21.85万
• 依托单位: UNIVERSITY OF WASHINGTON
• 依托单位国家: 美国
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-02-15 至 2010-01-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7383572
• 关键词: Accounting; American; Amputation; Amputees; Area; Artificial Leg; Arts; Atherosclerosis; Bulla; Caring; Cells; Characteristics; Class; Complications of Diabetes Mellitus; Condition; Conflict (Psychology); Data; Development; Device Designs; Devices; Electrodes; Electronics; Environment; Exploratory/Developmental Grant; Film; Friction; Funding; Future; Goals; Health Services Accessibility; Human body; Humidity; In Situ; Inferior; Laboratories; Lead; Leg; Length; Life; Limb structure; Lower Extremity; Measurement; Measures; Mechanics; Medical; Metals; Microprocessor; Military Personnel; Nature; Neuropathy; Orthotic Devices; Patients; Performance; Physiological; Positioning Attribute; Postoperative Period; Process; Property; Prosthesis; Rehabilitation therapy; Relative (related person); Research; Research Project Grants; Residual state; Resolution; Risk; Science; Shapes; Simulate; Skin; Skin Tissue; Staging; Surface; System; Technology; Temperature; Testing; Time; Tissues; Today; Ulcer; base; concept; day; design; diabetic; elastomeric; electric field; experience; follow-up; foot; human subject; innovation; interest; metropolitan; orthotics; pressure; prevent; prototype; sensor; shear stress; skin irritation; success

DESCRIPTION (provided by applicant): The shape and surface conditions of the residual limbs of amputees change throughout the day. Therefore, traditional static prosthetic devices cause discomfort after relatively short use. The long-term objective of this research direction is to create a new class of prosthetic and orthotic interfaces. These devices will dynamically conform to the human body while managing the environment variables at the interface, including pressure distribution, shear stress, moisture, temperature, degree of contamination, and skin condition. These devices will allow much longer periods of comfortable wear without formation of friction blisters and other forms of skin and tissue damage. The goal of the proposed project is to develop enabling sensing technology based on a flexible array and to build a prototype of a prosthetic liner with distributed sensing capability. The central idea behind the flexible array is to use unimodal field sensing, in this case, electric field, for measurement of properties of interest through selective surface functionalization. This approach offers advantages over multi-principle sensor fusion approaches because it allows reduction of complexity of electronic interface of the sensor array. Reduced complexity of electronics at the sensor cell level is critical for achieving the goal of thin, compact, high- resolution, and flexible sensor arrays that can measure multiple variables at the prosthetic liner/residual limb interface. The specific aims include a) the design of the flexible sensing array for measurement of moisture, temperature, pressure, and shear stress; b) integration of this array into a prosthetic liner/socket; and c) testing of device performance. These aims will be realized using cutting- edge developments in materials science and microprocessor control. Thin-film organic electronics will be combined with elastomeric conductors, metal electrode arrays, and multiplexed with a central microcontroller in order to achieve real-time measurement of temperature, moisture concentration, pressure, and shear stress. The final objective for the sensor prototype is to achieve measurement of all variables of interest with a sufficient accuracy, resolution, and repeatability. The project will set the stage for two future research directions: a) design of better prosthetic devices, and b) fundamental study of processes that take place at the liner-limb interface.

描述（由申请人提供）：截肢者残留四肢的形状和表面条件全天变化。因此，传统的静态假体设备在相对较短的使用后会引起不适。该研究方向的长期目标是创建一类新的假肢和矫形界面。这些设备将在管理界面处的环境变量时动态符合人体，包括压力分布，剪切应力，水分，温度，污染程度和皮肤状况。这些设备将允许更长的舒适磨损，而不会形成摩擦水泡以及其他形式的皮肤和组织损伤。拟议项目的目的是开发基于灵活数组的传感技术，并建立具有分布式感应能力的假肢的原型。柔性阵列背后的核心思想是使用单峰场传感（在这种情况下为电场）通过选择性的表面功能化来测量感兴趣的性质。这种方法比多原理传感器融合方法具有优势，因为它允许降低传感器阵列的电子界面的复杂性。在传感器电池水平上电子设备的复杂性降低对于实现薄，紧凑，高分辨率和柔性传感器阵列的目标至关重要，该目标可以测量假体衬里/残留肢体界面的多个变量。具体目的包括a）设计柔性传感阵列的设计，用于测量水分，温度，压力和剪切应力； b）将此数组集成到假肢/插座中； c）设备性能的测试。这些目标将通过材料科学和微处理器控制中的剪裁开发实现。薄膜有机电子将与弹性导体，金属电极阵列和中央微控制器多路复用，以实现温度，水分浓度，压力和剪切应力的实时测量。传感器原型的最终目标是通过足够的准确性，分辨率和可重复性来实现所有感兴趣的变量的测量。该项目将为未来的两个研究方向奠定阶段：a）设计更好的假肢设备，b）对衬里LIMB界面进行过程的基本研究。