Vibrotactile Feedback for Prosthetic Limbs

假肢的振动触觉反馈

• 批准号: 6935040
• 负责人: RONALD Raymond RISO
• 金额: $ 12.09万
• 依托单位: INNERSEA TECHNOLOGY, INC
• 依托单位国家: 美国
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6935040
• 关键词: artificial limbs; biomedical equipment development; human subject; medical implant science; method development; prosthesis; sensory feedback; sound frequency; touch; vibration

DESCRIPTION (provided by applicant): The functionality and user acceptance of prosthetic limbs and myoelectric prostheses in particular can be improved by providing sensory feedback. This project aims to develop a sensory system which prosthetists can incorporate into (or retrofit to) presently available myoelectric arms. The system will be non-invasive and is based on using an array of vibrotactile actuators to input coded information to the skin of the residual limb. Three categories of sensory information will be targeted for powered arms: grasp force, object slippage and either wrist rotation (i.e. pronation/supination) or span of finger opening. Prior work in developing vibrotactile strategies for sensory substitution has shown it is a promising approach. The implementation of that research into the marketplace, however, is being held up by a lack of suitable vibration actuators. The Specific Aim of this PHASE 1 project is to develop vibration actuators specifically for use with artificial limbs. The designed actuators will have minimal bulk and mass; consume only modest power; be inexpensive to fabricate; and require no maintenance. This project will develop novel solenoid type actuators, because optimal vibrotactile feedback codes require varying the vibration frequency and amplitude independently, and this can not be achieved using typical cell phone and pager rotatory motor based vibrators where the frequency and amplitude co-vary. The PHASE 1 work will develop prototypes of the novel actuators and test them for their suitability as input devices for vibrotactile sensory feedback codes for use with upper and lower extremity prosthesis users. In PHASE 2, the sensory feedback system will be extensively tested with upper extremity amputee subjects to optimize the coding strategy; validate that the system adds functionality to the prostheses; and demonstrate the reliability of the system components. Additionally, during PHASE 2, we will expand the user base to include lower extremity prosthesis users, where foot-floor contact and knee position information will be targeted.

描述（由申请人提供）：假肢和肌电假肢的功能和用户接受度可以通过提供感觉反馈来改善。该项目旨在开发一种感觉系统，假肢医生可以将其整合（或改造）到目前可用的肌电手臂中。该系统将是非侵入性的，基于使用一组振动触觉致动器向残肢皮肤输入编码信息。三类感觉信息将针对动力臂：抓握力，物体滑动和手腕旋转（即旋前/旋后）或手指张开的跨度。先前在开发振动触觉策略的感官替代方面的工作表明，这是一种很有前途的方法。然而，由于缺乏合适的振动致动器，这项研究在市场上的实施受到了阻碍。这个第一阶段项目的具体目标是开发专门用于假肢的振动执行器。设计的执行器将具有最小的体积和质量；只消耗适度的能量；制造成本低廉；而且不需要维护。该项目将开发新型螺线管型执行器，因为最佳的振动触觉反馈代码需要独立地改变振动频率和振幅，而这不能使用典型的基于手机和寻呼机旋转电机的振动器来实现，因为频率和振幅是共变的。第一阶段的工作将开发新型执行器的原型，并测试它们作为振动触觉感觉反馈代码输入设备的适用性，以供上肢和下肢假肢用户使用。在第二阶段，将对上肢截肢者的感官反馈系统进行广泛的测试，以优化编码策略；验证该系统为假肢增加了功能；并对系统部件的可靠性进行了验证。此外，在第二阶段，我们将扩大用户基础，包括下肢假体用户，他们的目标是脚底接触和膝盖位置信息。