Detection method of four-limb surface myoelectric axis

A detection method and electromyography technology, which can be used in diagnostic recording/measurement, medical science, diagnostic signal processing, etc., and can solve problems such as no clinical disease diagnosis and treatment, and surface electromyography limited to research fields.

Active Publication Date: 2018-03-23
SHANGHAI OYMOTION INFORMATION TECH
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  • Abstract
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Problems solved by technology

[0012] It can be seen that the above-mentioned patents are all about optimizing the acquisition of surface electromyography signals, especially the design and calculation methods to deal with the influence of changes in the position of surface electromyography electrodes on the acquisition of electromyography signals; but none of them can provide an objective index for clinical disease diagnosis and treatment , so that the application of surface electromyography is limited to the research field

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  • Detection method of four-limb surface myoelectric axis

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Embodiment 1

[0077] see figure 1 , the invention discloses a detection method of the surface myoelectric axis of the limbs, the detection method comprising:

[0078] According to the determined limb plane, determine the placement position of each electrode (1) and fix it properly; each electrode can obtain a myoelectric signal with a vector direction (2) according to its position, and then calculate the myoelectricity of this plane AxisVector(3);

[0079] According to the EMG vector of each plane (3), a multi-plane EMG vector is constructed to reconstruct and analyze the muscle activation and imbalance of the upper and lower extremities on the 3D space and time axis.

[0080] In this embodiment, the detection method specifically includes:

[0081] (1) Using the surface electromyography signal acquisition device, respectively paste 8 electrodes on the horizontal surface of the same cross-section of the limb in an equidistant manner;

[0082](2) The surface electromyographic signal obtai...

Embodiment 2

[0099] The difference between this embodiment and Embodiment 1 is that in this embodiment, the algorithm used in the detection method of the surface myoelectric axis of the limbs includes:

[0100] Low-pass filtering designed to obtain the envelope of the signal;

[0101] The integrator is designed to obtain the energy information of the signal;

[0102] Amplitude mean algorithm;

[0103] Notch filter design to remove power frequency interference;

[0104] EMG signal start point and end point detection;

[0105] EMG channel delay and correlation feature extraction;

[0106] Algorithm of EMG signal vector;

[0107] Synthesis algorithm for multiplane EMG signal vectors.

[0108] In summary, the method for detecting the surface myoelectric axis of the limbs proposed by the present invention can reconstruct and analyze the muscle activation and imbalance of the upper and lower limbs in 3D space and time axis, which is required for reasons such as clinical diseases, aging, and...

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Abstract

The invention discloses a detection method of a four-limb surface myoelectric axis. The detection method comprises the steps of determining the placing position of each electrode according to a determined limb plane and properly fixing each electrode; enabling each electrode to obtain a myoelectric signal with the vector direction according to the position and then calculating the myoelectric axisvector of the plane; constructing myoelectric vectors of multiple planes according to the myoelectric vector of each plane and therefore reconstructing and analyzing muscle activation and unbalance conditions of the upper limbs and the lower limbs on the 3D space axis and time axis. By means of the detection method of the four-limb surface myoelectric axis, the muscle activation and unbalance conditions of the upper limbs and the lower limbs can be reconstructed and analyzed on the 3D space axis and time axis, and an objective detection index is provided for muscle unbalance activation causedby clinical diseases or aging, disusing or the like.

Description

technical field [0001] The invention belongs to the technical field of signal detection, and relates to a method for detecting myoelectricity, in particular to a method for detecting an axis of myoelectricity on the surface of limbs. Background technique [0002] Surface electromyography (sEMG) is the same as needle electromyography in terms of electrophysiology, but the research purpose, equipment and data analysis techniques of surface electromyography are very different from needle electromyography. big difference. Compared with needle electrode electromyography, it places electrodes on the surface of the skin, which is safe, convenient, painless, non-invasive, and can be used to test EMG signals in a wide range; it can not only measure muscle activity in a static state, but also It can continuously observe changes in muscle activity during exercise, which is a meaningful diagnostic method for motor function. There is a close relationship between EMG and muscle contract...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0488
CPCA61B5/72A61B5/389
Inventor 安丙辰倪华良
Owner SHANGHAI OYMOTION INFORMATION TECH
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