Multi-channel hand myoelectric acquisition wrist strap based on fabric electrode

Abstract

The invention relates to a multi-channel hand myoelectric acquisition wrist strap based on a fabric electrode. Differential electrodes and a reference electrode are uniformly arranged on the wrist strap; the differential electrodes and the reference electrode are located on the portions, slightly close to the wrist, in the middle of the forearm. If the differential electrodes and the reference electrode are too close to the wrist, the electrodes are away from the muscle belly, and the signal intensity is low. If the differential electrodes and the reference electrode are too away from the wrist, the resolving power of the electrodes on finger movements is not strong. The center distance between every two differential electrodes is not larger than 30 mm, and if the distance is selected to be too large, too many effective frequency components of myoelectric signals are lost. The differential electrodes are distributed in pairs, the number of the pairs is n, and the differential electrodes correspond to four muscle groups related to hand movements. The rectangular reference electrode is arranged in a non-muscle activity area as much as possible, and the reference electrode is used forproviding null voltage reference, so that the signals are stable as soon as possible. The wrist strap is light, convenient to use and comfortable to wear; due to the characteristics of the fabric electrode, skin does not need to be pretreated or coated with conductive paste for collection, and the wrist strap is suitable for long-term collection.

Description

technical field [0001] The patent of the present invention relates to a wristband for collecting multi-channel hand myoelectricity based on fabric electrodes. Background technique [0002] The coordination of wrist and fingers exists in many daily activities, such as shooting, badminton, table tennis swing, playing the piano, etc., and related hand movement training is often necessary to learn these contents. Studies have shown that the exertion of the wrist and fingers is closely related to the forearm muscles. This correspondence can be reflected in the multiple independent muscles of the arm. For a single individual, at different times, the same action corresponds to The EMG emission patterns of each muscle group are highly similar. By using multi-channel electrodes to measure the surface EMG signal (sEMG) of the forearm, the state of hand movement or muscle fatigue information can be obtained accurately and in real time, so as to give corresponding training feedback Dat...

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Problems solved by technology

[0003] The civilian products used for forearm electromyography collection are relatively mature at present, such as Canada's MYO bracelet, China's D-Ting bracelet, etc. However, due to the use of hard electrode groups, these products are uncomfortable to wear and are not suitable for long-term use. Wearing and monitoring EMG signals are currently only used in short-term control scenarios and are not suitable for popularization; flexible fabric EMG electrodes overcome this shortcoming, and have the advantages of being comfortable to wear and washable.

However, the current related products, such as Athos sportswear, use flexible fabric electrodes, but they only place large single-ended electrodes on the upper arm muscles and chest muscles of the human body, which can only roughly reflect the activity status of regional muscles. , the resolution of small muscle electrical signals is not high

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