Zibrio, Inc. Houston, TX, USA.
Department of Health and Human Performance, University of Houston, Houston, TX, USA; Center for Neuromotor and Biomechanics Research, University of Houston, Houston, TX, USA; Center for Neuro-engineering and Cognitive Science, University of Houston, Houston, TX, USA.
J Biomech. 2019 Jun 11;90:138-142. doi: 10.1016/j.jbiomech.2019.04.039. Epub 2019 May 4.
The Zibrio SmartScale is a low-cost, portable force platform designed to perform an objective assessment of postural stability. The purpose of the present study was to validate the center of pressure (COP) measurements in the Zibrio SmartScale. Simultaneous COP data was collected by a Zibrio SmartScale and a laboratory-grade force platform (LFP) under the dynamic motion of an inverted pendulum device intended to mimic the sway of a standing human. The inverted pendulum was placed on the Zibrio SmartScale which was placed on the LFP. The pendulum was then displaced to angles of 3° and 5° in both the anterior-posterior (AP) and medial-lateral (ML) directions. The findings of this study show low mean average error (MAE) among the measures taken simultaneously upon the LFP and Zibrio SmartScale with no appreciable difference in error in either AP or ML COP directions. Averaged over repeated trials, the MAE did not surpass 0.5 mm. This represented 0.4% of the total range (±50 to 60 mm in 5° displacement trials) of simulated COP. The results of this study strongly indicate that the Zibrio SmartScale can perform adequately as a light-weight and low-cost alternative method of COP measurement in comparison to a traditional LFP.
Zibrio SmartScale 是一种低成本、便携式力平台，旨在对姿势稳定性进行客观评估。本研究的目的是验证 Zibrio SmartScale 中的压力中心 (COP) 测量值。在倒置摆装置的动态运动下，同时通过 Zibrio SmartScale 和实验室级力平台 (LFP) 收集 COP 数据，该装置旨在模拟站立人体的摆动。将倒置摆放在 Zibrio SmartScale 上，然后将其放在 LFP 上。然后将摆分别向前后 (AP) 和内外 (ML) 方向以 3°和 5°的角度移动。本研究的结果表明，LFP 和 Zibrio SmartScale 同时测量的平均平均误差 (MAE) 较低，AP 或 ML COP 方向的误差没有明显差异。在重复试验中平均，MAE 不超过 0.5 mm。这代表了模拟 COP 总范围（在 5°位移试验中为±50 至 60 mm）的 0.4%。本研究的结果强烈表明，与传统的 LFP 相比，Zibrio SmartScale 可以作为一种轻便、低成本的 COP 测量替代方法，性能足够好。
