Su F-C, Chiu H-Y, Chang J-H, Lin C-F, Hong R-F, Kuo L-C
Institute of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan, Republic of China.
Proc Inst Mech Eng H. 2009 Jan;223(1):121-9. doi: 10.1243/09544119JEIM422.
A simulated jar apparatus was developed to record hand kinetics and torque contribution of a digit during jar-opening activities. The design of the apparatus, namely a jar body and a lid, is similar to a commercial jam jar that is regularly seen in daily living. One six-axis force-torque transducer and a torque cell were mounted inside the jar lid to detect the external force exerted from the digit and fixed on to the jar body to record the overall torque generated by the hand and wrist respectively. The applications of the apparatus were used to test the twisting torque of the hand and to measure the applied forces of the digit, which are both important factors in opening a jar. The contribution of each digit relative to the total twisting torque of the hand could be obtained via the apparatus. The intraclass correlation coefficient of the repeated measurements of the obtained forces and moments for different counterweights was approximately 0.96-1.00, which indicates that the reliability of the measured components of the apparatus is high. The high coefficient of determination (r2 > 0.99) indicates high accuracy of prediction of the measured values with respect to the expected loads. The validation outcomes support the design rationale and actual body part of the simulated jar. In addition, understanding the contribution of a single digit in opening a jar was also achieved via the apparatus and model.
开发了一种模拟广口瓶装置，用于记录开瓶活动中手指的手部动力学和扭矩贡献。该装置的设计，即瓶身和瓶盖，类似于日常生活中常见的商用果酱瓶。一个六轴力扭矩传感器和一个扭矩传感器安装在瓶盖内部，以检测手指施加的外力，并固定在瓶身上，分别记录手部和手腕产生的总扭矩。该装置的应用用于测试手部的扭转扭矩，并测量手指施加的力，这两个都是开瓶的重要因素。通过该装置可以获得每个手指相对于手部总扭转扭矩的贡献。对于不同配重，所获得的力和力矩的重复测量的组内相关系数约为0.96 - 1.00，这表明该装置测量组件的可靠性很高。高决定系数（r2 > 0.99）表明测量值相对于预期载荷的预测精度很高。验证结果支持模拟广口瓶的设计原理和实际身体部位。此外，通过该装置和模型还了解了单个手指在开瓶中的贡献。
