A modular six-directional force sensor for prosthetic assessment: a technical note.
A modular six-directional force sensor for prosthetic assessment: a technical note.
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发表时间：
1997-04
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通讯作者：
J. Sanders;R. A. Miller;D. N. Berglund;S. G. Zachariah
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文献类型：
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作者：
J. Sanders;R. A. Miller;D. N. Berglund;S. G. Zachariah
介绍了一种用于测量下肢截肢者假肢传递的力和力矩的装置。传感单元的设计比以前的假体力测量设备更先进，因为它非常薄（19 mm），重量轻（527.5 g，包括信号调节仪器）。盘形传感器安装在标准模块化假体的承窝和承窝适配器之间，测量该位置的所有六个力和力矩分量。使用了12个应变计，配置成6个双臂有源惠斯通电桥电路。根据校准数据构建6X6矩阵，以将6分量电桥输出矢量与6分量力和力矩矢量相关联。在台架测试环境中，在经胫骨截肢（TTA）的人行走期间遇到的典型负载组合下对传感器进行了评估，结果显示每个方向的误差小于满量程输出的7.2%。TTA以不同速度行走的受试者收集的数据。
A device designed to measure the forces and moments transmitted through prostheses of persons with lower limb amputation is presented. The sensing unit design is an advancement over previous prosthesis force measurement devices in that it is very thin (19 mm) and lightweight (527.5 g, including signal-conditioning instrumentation). The disk-shaped transducer fits between the socket and socket adapter of a standard modular prosthesis, measuring all six force and moment components at this location. Twelve strain gages were used, configured into six two-arm active Wheatstone bridge circuits. A 6X6 matrix was constructed from calibration data to relate the 6-component bridge-output vector to a 6-component force and moment vector. In a bench-test setting, the sensor was evaluated under typical load combinations encountered during the walking of a person with transtibial amputation (TTA) and shown to have errors less than 7.2% of the full-scale output for each direction. Data collected on a subject with TTA walking at different speeds are presented.