Triaxial force transducer for investigating stresses at the stump/socket interface
Triaxial force transducer for investigating stresses at the stump/socket interface
复制标题
用于研究树桩/插座界面处应力的三轴力传感器
DOI：
10.1007/bf02446199
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发表时间：
2006
影响因子：
3.2
通讯作者：
J. F. Regan
中科院分区：
文献类型：
--
作者：
R. Williams;David Porter;V. C. Roberts;J. F. Regan
虽然已经对截肢者残肢插口界面的正常压力进行了调查，但对同样发生的剪应力知之甚少。研究表明，剪切应力和正常应力的组合会显著加剧不适以及血管和组织损伤。一种同时测量正应力和剪应力的方法将有助于研究和改善假体适合性。研制了一种小型三轴力传感器(直径4.9×16 mm)，可嵌入插座壁内。介绍了该装置的工作原理、结构、性能及局限性。初步测量了PTB窝内的界面应力在整个步态周期内的变化。当使用两个不同的假肢时，这些数据显示出明显不同的应力模式。
Although normal pressures at the stump socket interface of the lowerlimb amputee have been investigated, little is known about the shear stresses that also occur. Studies suggest that the combination of both shear and normal stresses significantly exacerbates discomfort and vascular and tissue damage. A means of simultaneously measuring normal and shear stresses will aid in the investigation and improvement of prosthetic fit. A miniature triaxial force transducer (4·9×16 mm diameter) has been developed which can be recessed into the socket wall. The principle of operation, construction, performance and limitations of the device are described. Preliminary measurements of the interface stress variations over the gait cycle in a supra-condylar PTB socket are presented. These show clear differences in the stress patterns present when two different prosthetic feet are used.