Myoelectric prosthesis control source lead optimization method based on correlation coefficients

Abstract

The invention relates to a medical rehabilitation instrument. In order to achieve the purpose of accurately and fast forecasting angles of joints of lower limbs and controlling a myoelectric prosthesis, the technical scheme includes that a myoelectric prosthesis control source lead optimization method based on correlation coefficients comprises the following steps of extracting myoelectric signals of all muscles of a human body in processes of deep squatting, standing, extension of knee joints and walking; recording movement three-dimensional coordinates of the human body by utilizing a three-dimensional movement capturing system, and accordingly solving information of angles of the knee joints of the lower limbs of the human body; extracting a root mean square value of myoelectricity as a feature parameter and calculating the correlation coefficients of the feature parameter and the angels of the knee joints of the lower limbs; and sequentially removing uncorrelated muscle leads according to the correlation coefficients, establishing a lower limb muscle and bone kinetic model by utilizing an artificial neural network (ANN), predicting the angels of the joints, and comparing errors of different results so as to obtain the best lead optimization mode under different actions. The myoelectric prosthesis control source lead optimization method based on the correlation coefficients is mainly used for design and manufacture of medical rehabilitation instruments.

Description

technical field [0001] The invention relates to a medical rehabilitation device, in particular to a new method for optimizing the leads of myoelectric prosthesis control sources under different movements based on correlation coefficients. Background technique [0002] Physical disability has become the most serious disability disease among the population in our country, which brings a heavy burden to the family and society. How to help disabled patients effectively improve their self-care ability and improve the quality of life of the physically disabled is a severe challenge for the government and society, and has become an important research topic in the field of medical rehabilitation. Myoelectric prosthesis, also known as EMG controlled limb prosthetics, is a man-machine system that uses the myoelectric signal of the residual limb to control the prosthesis. The essence of the control principle is the information exchange between the human body and the prosthesis, which c...

AI Technical Summary

Problems solved by technology

However, the current prosthetics have many shortcomings such as low flexibility, imprecise control, and poor degree of freedom. The birth of a myoelectric prosthetic leg with mature technology and precise control has not yet been seen in the market.

At the same time, myoelectric prostheses on the market often require joint control of many pieces of myoelectricity, which not only brings unnecessary redundant information, but also seriously affects the portability and control efficiency of myoelectric prostheses.

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