Bergmann Tiest Wouter M, Kappers Astrid M L
Institute for Communication, Media and Information Technology, Rotterdam University of Applied Sciences, Rotterdam, The Netherlands.
Department of Human Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
R Soc Open Sci. 2019 Mar 6;6(3):181563. doi: 10.1098/rsos.181563. eCollection 2019 Mar.
In this paper, we assess the importance of visual and haptic information about materials for scaling the grasping force when picking up an object. We asked 12 participants to pick up and lift objects with six different textures, either blindfolded or with visual information present. We measured the grip force and estimated the load force from the object's weight and vertical acceleration. The coefficient of friction of the materials was measured separately. Already at an early phase in the grasp (before lift-off), the grip force correlated highly with the textures' static coefficient of friction. However, no strong influence on the presence of visual information was found. We conclude that the main mechanism for modulation of grip force in the early phase of grasping is the real-time sensation of the texture's friction.
在本文中，我们评估了在拿起物体时，关于材料的视觉和触觉信息对于调整抓握力的重要性。我们让12名参与者在蒙眼或有视觉信息的情况下拿起并举起具有六种不同质地的物体。我们测量了握力，并根据物体的重量和垂直加速度估算了负载力。材料的摩擦系数是单独测量的。在抓握的早期阶段（离地之前），握力就与质地的静摩擦系数高度相关。然而，未发现视觉信息的存在有强烈影响。我们得出结论，抓握早期阶段握力调制的主要机制是质地摩擦力的实时感知。
