Fuzzy Fusion Method of Stability and EEG-EMG Coherence Coefficient in Walking Aid

A technology of coherence coefficient and fuzzy fusion, applied in sensors, devices to help people walk, medical science, etc., can solve the problems of secondary injury of patients, psychological and physiological effects of patients, etc.

Active Publication Date: 2011-12-14
TIANJIN UNIV
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AI Technical Summary

Problems solved by technology

It can be seen that the walker, as an important tool to assist patients in sports, has caused secondary injuries to patients due to improper use, and has caused adverse effects on patients' psychology and physiology.

Method used

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  • Fuzzy Fusion Method of Stability and EEG-EMG Coherence Coefficient in Walking Aid
  • Fuzzy Fusion Method of Stability and EEG-EMG Coherence Coefficient in Walking Aid
  • Fuzzy Fusion Method of Stability and EEG-EMG Coherence Coefficient in Walking Aid

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Embodiment Construction

[0048] a) Assistive tipping index (WTI)

[0049] When the patient is standing and walking with the help of the power assist system, the handle of the assist device concentrates the additional mechanical demands of the patient on the outside world. The assist device is actually an important tool that the patient can rely on to maintain their own stable movement. As described above, when in a stable state of motion, the power assist system not only provides the power for the patient to move forward, but also actually bears the instability of the patient during the process of walking, and uses its relatively high stability Maintain the ability to "digest" this instability. In this way, certain indicators can be used to quantify the instability transmitted between the patient and the power assist system, and to understand the stability of the entire exercise process.

[0050] The Walker Tipping Index (WTI) is one such indicator. When the system receives patient-imposed instabili...

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Abstract

The invention relates to the technology of monitoring the safety of rehabilitation technical aids, and aims to provide early warning in advance and prevent secondary injury of aid users. The invention adopts the technical scheme that a method of fuzzy fusion of the stability of a walker in the walking aid process and an electroencephalogram-electromyography coherence coefficient comprises the following steps: 1) collecting the electroencephalogram (EEG) of leads C3 and C4, filtering the EEG of 0.5-45Hz and amplifying the electromyography (EMG); 2) selecting minimum peak values of two coherence coefficients (Coh) as parameters for coherence analysis; 3) with calibration matrix of the walker already known, outputting a voltage via a strain gauge on the walker to obtain the handle reaction vector (HRV), and calculating the walker tipping index (WTI); 4) determining the WTI and the membership degree function of the electroencephalogram-electromyography coherence efficient through experiments; and 5) according to the maximum membership degree principle, judging the states of the WTI and the Coh respectively by means of fuzzy recognition algorithm. The method of the invention is mainly applied to design and manufacture of rehabilitation technical aids.

Description

technical field [0001] The invention relates to the safety monitoring technology of rehabilitation aids, in particular to a fuzzy fusion method of stability and coordination degree in walking aid safety monitoring. Background technique [0002] Due to the frequent occurrence of natural disasters, traffic accidents, and the aggravation of the aging society, the scope of neurological dysfunction or limb injury is expanding year by year. The use of rehabilitation aids such as walkers and crutches is also becoming more common. Then comes the safety issue of the use of rehabilitation aids. [0003] According to the survey, from 2001 to 2006, about 47,000 people (not less than 65 years old) in the United States were injured because of improper use of walkers and crutches every year. Of these, 87% were caused by improper use of walkers. It can be seen that the walker, as an important tool to assist the patient's movement, has caused secondary damage to the patient due to imprope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61H3/00A61B5/04
Inventor 徐瑞明东邱爽王璐綦宏志万柏坤
Owner TIANJIN UNIV
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