用头戴激光器引导机器人,帮助上肢残疾者完成日常操作。
A Laser-guided Interaction Interface for Providing Effective Robot Assistance to People with Upper Limbs Impairments
- 用户戴激光发射器,通过头部动作指引机器人
- 实现点选和虚拟键盘两种控制模式,完成抓取等任务
- 适合中风等上肢功能障碍者,提升居家自主能力
机器人在辅助残疾人提升独立性和日常活动参与度方面展现出巨大潜力。本研究开发了一种针对上肢功能障碍(如中风后患者)的人机交互界面。该界面利用低成本但高效的激光发射装置,通过在工作区表面投射激光,让用户通过头部运动引导机械臂到达目标位置,实现抓取与操作。激光投影由基于神经网络的感知模块检测,用户佩戴头戴式激光器,可直观控制机器人运动。系统提供两种操控模式:第一种直接选择目标点,命令机器人移动至该位置;第二种采用虚拟纸面键盘,用户通过激光指向按钮来调节末端执行器的笛卡尔速度,并控制夹持器动作。该接口在配备1自由度仿喙式夹爪的6自由度助手机械臂上进行了测试,两种模式结合成功完成了需双手协调的任务,而这类任务通常对上肢障碍者构成挑战。
原文摘要 · Abstract (English)
Robotics has shown significant potential in assisting people with disabilities to enhance their independence and involvement in daily activities. Indeed, a societal long-term impact is expected in home-care assistance with the deployment of intelligent robotic interfaces. This work presents a human-robot interface developed to help people with upper limbs impairments, such as those affected by stroke injuries, in activities of everyday life. The proposed interface leverages on a visual servoing guidance component, which utilizes an inexpensive but effective laser emitter device. By projecting the laser on a surface within the workspace of the robot, the user is able to guide the robotic manipulator to desired locations, to reach, grasp and manipulate objects. Considering the targeted users, the laser emitter is worn on the head, enabling to intuitively control the robot motions with head movements that point the laser in the environment, which projection is detected with a neural network based perception module. The interface implements two control modalities: the first allows the user to select specific locations directly, commanding the robot to reach those points; the second employs a paper keyboard with buttons that can be virtually pressed by pointing the laser at them. These buttons enable a more direct control of the Cartesian velocity of the end-effector and provides additional functionalities such as commanding the action of the gripper. The proposed interface is evaluated in a series of manipulation tasks involving a 6DOF assistive robot manipulator equipped with 1DOF beak-like gripper. The two interface modalities are combined to successfully accomplish tasks requiring bimanual capacity that is usually affected in people with upper limbs impairments.
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