Sancho-Bru Joaquín L, Jarque-Bou Néstor J, Vergara Margarita, Pérez-González Antonio
Biomechanics and Ergonomics Group, Department of Mechanical Engineering and Construction, Universitat Jaume I, Castellón de la Plana, Spain.
Proc Inst Mech Eng H. 2014 Feb;228(2):182-9. doi: 10.1177/0954411914522023. Epub 2014 Feb 6.
Hand movement measurement is important in clinical, ergonomics and biomechanical fields. Videogrammetric techniques allow the measurement of hand movement without interfering with the natural hand behaviour. However, an accurate measurement of the hand movement requires the use of a high number of markers, which limits its applicability for the clinical practice (60 markers would be needed for hand and wrist). In this work, a simple method that uses a reduced number of markers (29), based on a simplified kinematic model of the hand, is proposed and evaluated. A set of experiments have been performed to evaluate the errors associated with the kinematic simplification, together with the evaluation of its accuracy, repeatability and reproducibility. The global error attributed to the kinematic simplification was 6.68°. The method has small errors in repeatability and reproducibility (3.43° and 4.23°, respectively) and shows no statistically significant difference with the use of electronic goniometers. The relevance of the work lies in the ability of measuring all degrees of freedom of the hand with a reduced number of markers without interfering with the natural hand behaviour, which makes it suitable for its use in clinical applications, as well as for ergonomic and biomechanical purposes.
手部运动测量在临床、人体工程学和生物力学领域都很重要。摄像测量技术能够在不干扰手部自然行为的情况下测量手部运动。然而，要精确测量手部运动需要使用大量的标记物，这限制了其在临床实践中的应用（手部和腕部需要60个标记物）。在这项研究中，我们提出并评估了一种基于简化手部运动学模型、使用较少标记物（29个）的简单方法。我们进行了一系列实验来评估与运动学简化相关的误差，并评估其准确性、重复性和再现性。运动学简化带来的整体误差为6.68°。该方法在重复性和再现性方面误差较小（分别为3.43°和4.23°），并且与使用电子测角仪相比没有统计学上的显著差异。这项研究的意义在于能够用较少的标记物测量手部的所有自由度，同时不干扰手部自然行为，这使其适用于临床应用以及人体工程学和生物力学目的。
