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Capturing Human Hand Kinematics for Object Grasping and Manipulation

机译:捕获人的手运动学以进行对象抓取和操纵

摘要

The aim of this thesis is to create a low-cost sensor equipped glove using commercially available components that can be used to obtain position, velocity and acceleration data for individual fingers of a hand within an optical motion capture environment. Tracking the full degrees of freedoms of the hand and finger motions without any hindrances is a challenging task in optical motion capture measurements. Attaching markers on every finger and hand joint makes motion capture systems troublesome due to practical problems such as blind spots and/or obtaining higher derivative motion constraints, such as velocities and accelerations. To alleviate this, we propose a method to capture the hand and finger kinematics with a reduced set of optical markers. Additionally inertial sensors are attached to the fingertips to obtain linear acceleration measurements. For optimal velocity estimation, a Kinematic Kalman Filter (KKF) is implemented and its result is compared to the time derivative of the Motion Capture System measurement. The higher derivative specifications are related to contact and curvature constraints between the fingers and the grasped object and are later used in formulating the synthesis task for the design of robotic fingers and hands. A preliminary prototype device has been developed to obtain position, velocity and acceleration information of each fingertip by incorporating multiple accelerometers into the basic design of reduced marker set.
机译:本文的目的是使用可商购的组件来创建一种低成本的,配备传感器的手套,该组件可用于获取光学运动捕捉环境中手的各个手指的位置,速度和加速度数据。跟踪手和手指运动的全部自由度而没有任何障碍是光学运动捕捉测量中的一项艰巨任务。由于实际问题(例如盲点)和/或获得更高的派生运动约束(例如速度和加速度),在每个手指和手关节上都附有标记会使运动捕获系统出现麻烦。为了减轻这种情况,我们提出了一种使用减少的光学标记集来捕获手和手指运动学的方法。另外,惯性传感器连接到指尖以获得线性加速度测量值。为了获得最佳速度估计,采用了运动卡尔曼滤波器(KKF),并将其结果与运动捕捉系统测量的时间导数进行了比较。较高的导数规格与手指与所抓取的物体之间的接触和曲率约束有关,以后可用于制定用于设计机械手指和手的合成任务。已经开发了一种初步的原型设备,通过将多个加速度计合并到精简标记集的基本设计中来获取每个指尖的位置,速度和加速度信息。

著录项

  • 作者

    Ghosh Shramana;

  • 作者单位
  • 年度 2013
  • 总页数
  • 原文格式 PDF
  • 正文语种 en
  • 中图分类

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