A real-time control method for prosthetics based on single-point acquisition of muscle sound signals

Abstract

A method for real-time control of a prosthesis based on single-point collection of muscle sound signals, comprising the following steps: collecting muscle sound signals through a sound sensor; collecting the forearm grasping sound signals from the forearm when the forearm is grasping the muscle sound signal through a data acquisition card ;Remove the noise of the forearm grasping sound signal; convert the sound signal into a digital signal; divide the collected digital signal into short time frames, and calculate the variance of each frame signal; if the variance of each frame signal exceeds the first threshold, intercept The following data segment is used as the action signal segment, and the variance value of three consecutive frames exceeds the second threshold, then the subsequent data segment is intercepted as the action signal segment; the time domain feature of the action signal in the action signal segment is extracted; the time domain feature Input the linear classification model to obtain the result of action discrimination; convert the result of action discrimination into electrical signals to control the grasping action of the prosthesis. The invention has low cost, little interference, low hardware requirements, simple operation and less interference.

Description

technical field [0001] The invention relates to artificial limb control, in particular to a real-time artificial limb control method based on single-point collection of muscle sound signals. Background technique [0002] At present, the control signals used for prosthetic control mainly include the human body's own myoelectric signal, EEG signal, nerve electrical signal and sound. Among them, EMG has always been the main direction of research due to its many advantages, but there are still some shortcomings in EMG, such as strict requirements on the acquisition surface, expensive sensors, strong influence by impedance, poor anti-interference ability and so on. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a real-time control method of prosthesis based on single-point collection of muscle sound signals in order to overcome the defects of the above-mentioned prior art. [0004] The object of the present inventio...

AI Technical Summary

Problems solved by technology

Among them, EMG has always been the main direction of research due to its many advantages, but there are still some shortcomings in EMG, such as strict requirements on the acquisition surface, expensive sensors, greatly affected by impedance, poor anti-interference ability, etc.