Functional electrical stimulation knee joint angle control method

Abstract

The invention discloses a functional electrical stimulation knee joint angle control method, which comprises the following steps: acquiring a first knee joint angle and an ultraphonic muscle image of a target muscle under functional electrical stimulation; frequency-domain filtering the ultraphonic muscle image of the target muscle, and extracting a thickness parameter of the target muscle by utilizing a crosscorrelation method; extracting a texture parameter of the target muscle through a gray level co-occurrence matrix method; obtaining a second knee joint angle according to stimulus intensity, the thickness parameter of the target muscle and the texture parameter of the target muscle; obtaining a relative root-mean-square error, a standard root-mean-square error and a relative coefficient according to the second knee joint angle and the first knee joint angle; and obtaining a compound mode of the stimulus intensity, the thickness parameter of the target muscle and the texture parameter of the target muscle according to the relative root-mean-square error, the standard root-mean-square error and the relative coefficient. According to the method, the accuracy of control signals is high, and the input and output parameters can be adjusted according to the functional status of the current target muscle.

Description

technical field [0001] The invention relates to the field of guidance and control for rehabilitation treatment of disabled persons, in particular to a method for controlling the knee joint angle by functional electrical stimulation. Background technique [0002] In recent years, the incidence of paralysis caused by spinal cord injury and stroke and other cerebrovascular diseases has shown a significant upward trend, which not only brings a greater burden to individuals and families, but also becomes an increasingly serious social problem. The executive meeting of the State Council held in my country in 2011 pointed out that by 2015, the overall life of disabled people in my country will be well-off, the participation and development status will be significantly improved, and the goal of “rehabilitation services for everyone” will be initially realized. [0003] Reconstruction of limb function is a focus and difficulty in the rehabilitation treatment of paraplegic patients, w...

AI Technical Summary

Problems solved by technology

[0017] The respective shortcomings of the traditional limb control and bioelectric control FES systems severely limit the wide application of FES in the rehabilitation training of paraplegic patients. In summary, the main limiting factor is that the input signal used for predictive control cannot accurately reflect the target in real time. The functional activity state of the muscles (such as muscle fatigue), so that the FES system has control accuracy problems and system stability problems

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