基于超声信号的假手实时控制系统研究

Study on ultrasound-based prosthetic hand real-time control system

假手控制方法是假肢技术研究的热点问题之一,研究者利用各种人体生理信号作为控制源,希望能够简单、方便、准确地操控多个自由度。本文在以前工作的基础上,研究用超声实时控制动力假手的新方法,设计了基于超声的假手控制系统,包括单通道超声收发和采集、假肢控制、信息处理与反馈等部分。基于该系统进行了正常人假手控制实验,探讨将超声信号作为假手控制源的可行性。实验结果表明单通道超声信号能连续控制假手的张开程度,为实现假手的抓握控制提供了一种简单有效的方式,具有良好的控制性能。这为进一步研制多通道超声控制多自由度假手提供了理论与实验基础。

The bionic control of prosthetic hand is a challenging problem in prosthesis research, and researchers have explored the potential of using many physiological signals to provide simple, convenient and dexterous control with multiple degree of freedom. In this study, we suggest a new real-time control method for powered prosthetic hand based on our previous research results. This study designs an ultrasound-based prosthetic hand control system including A-mode ultrasound transmission and collection, prosthetic hand control, information processing and feed-back, and etc. The control performance of the system was evaluated with normal subjects and the feasibility of uhrasound control of prosthetic hand was investigated. Experiment results show that ultrasound signal could control the continuous change of prosthetic hand＇ s opening and closure position, which provides a simple method for grasp control. The results suggest that ultrasound signal, method for prosthesis control.