An Inductive Sensing System to Measure In-Socket Residual Limb Displacements for People Using Lower-Limb Prostheses.
An Inductive Sensing System to Measure In-Socket Residual Limb Displacements for People Using Lower-Limb Prostheses.
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DOI：
10.3390/s18113840
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发表时间：
2018-11-09
期刊：
影响因子：
--
通讯作者：
Sanders JE
中科院分区：
文献类型：
--
作者：
Henrikson KM;Weathersby EJ;Larsen BG;Cagle JC;McLean JB;Sanders JE
本研究的目的是评估嵌入式传感系统的性能，旨在测量假肢接受腔壁和残肢之间的距离。将低剖面感应传感器层压到假体承窝中，并为四名经胫骨截肢的参与者创建了嵌入铁颗粒的弹性体衬垫的柔性铁磁目标。利用传感器性能测试的见解，开发了一种新的校准程序，以快速准确地校准多个嵌入式传感器。通过实验室测试对传感系统进行了评估，参与者穿着三种不同厚度的袜子组合，并进行了一系列活动，包括站立，行走和坐下。当穿着较厚的袜子时，肢体通常会进一步远离插座，峰-峰位移减小。然而，传感器没有测量给定袜子组合的等效距离或位移，这提供了关于承窝配合以及袜子更换干预如何影响承窝配合的信息。监测肢体-接受腔位移可作为研究人员和临床医生定量评估接受腔适合性的有价值的工具。
The objective of this research was to assess the performance of an embedded sensing system designed to measure the distance between a prosthetic socket wall and residual limb. Low-profile inductive sensors were laminated into prosthetic sockets and flexible ferromagnetic targets were created from elastomeric liners with embedded iron particles for four participants with transtibial amputation. Using insights from sensor performance testing, a novel calibration procedure was developed to quickly and accurately calibrate the multiple embedded sensors. The sensing system was evaluated through laboratory tests in which participants wore sock combinations with three distinct thicknesses and conducted a series of activities including standing, walking, and sitting. When a thicker sock was worn, the limb typically moved further away from the socket and peak-to-peak displacements decreased. However, sensors did not measure equivalent distances or displacements for a given sock combination, which provided information regarding the fit of the socket and how a sock change intervention influenced socket fit. Monitoring of limb–socket displacements may serve as a valuable tool for researchers and clinicians to quantitatively assess socket fit.
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