Half-dry electrode, system and method for bioelectrical signal sensing

A bioelectric signal and dry electrode technology, applied in the field of EEG measurement, can solve the problems of conductive paste or viscous gel falling off, low impedance, uncomfortable use, etc., to achieve signal quality improvement, impedance and stability, and improve comfort Effect

Inactive Publication Date: 2017-02-22
SUZHOU GREENTEK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Wet electrodes are currently the "gold standard" for clinical and scientific research applications. Due to their low and stable impedance, generally within 5 kΩ, the signal quality is high, but there are still the following disadvantages: (1) Wet electrodes need to be coated with conductive glue (paste) And skin pretreatment, preparation is troublesome and time-consuming, especially for high-density electrode measurement; (2) Electrolyte such as conductive gel is easy to dry out, and conductive gel needs to be replenished regularly; (3) Conductive paste or viscous gel may fall off, causing measurement Interruption; (4) The amount of electrolyte used is large, the ha

Method used

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  • Half-dry electrode, system and method for bioelectrical signal sensing
  • Half-dry electrode, system and method for bioelectrical signal sensing
  • Half-dry electrode, system and method for bioelectrical signal sensing

Examples

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Example Embodiment

[0036] Example 1

[0037] Embodiment 1 is a basic embodiment of the present invention.

[0038] Such as figure 1 , 2 , 5, and 7, a semi-dry electrode for bioelectric signal sensing, including a supporting base 1, at least one supporting leg 2 and an ion slow release body 3; the supporting leg 2 is attached to the supporting base 1. And extend from the support base 1, which supports the sensor element 4 arranged at the tail end; the ion slow release body 3 contains a conductive liquid, and slowly releases the conductive liquid to present a semi-dry surface to the subject; The ion sustained-release body 3 or the conductive liquid released by it is at least partially in contact with the sensor element 4, and the bioelectric signal is transmitted from the subject through the ion sustained-release body 3 to the transmitter Sense element 4 on.

[0039] The advantages are: the conductive liquid slowly released by the ion slow release body 3 wets the skin to be tested, which is conducive t...

Example Embodiment

[0040] Example 2

[0041] Example 2 is a further improvement on the basis of Example 1.

[0042] Such as figure 1 As shown, the supporting leg 2 is a claw-type supporting leg 2a, which can pass through hair quickly and effectively. The claw-type support leg 2a extends outward from the support base 1 in a direction that is not perpendicular to the support base 1, and its tail end forms a non-perpendicular angle with the skin to be tested.

[0043] The prior art electrode supports such as electrode caps, strips, etc. usually provide a force perpendicular to the direction of the skin to be tested. In the present invention, the claw support leg 2a is oriented in a non-vertical direction relative to the skin to be tested. Under the action of, it will deflect to the horizontal direction, so that the claw-type supporting leg 2a slides on the skin to be tested, thereby forming good contact with the skin. When the claw support legs 2a are in contact with the subject's skin under pressure, a...

Example Embodiment

[0044] Example 3

[0045] Example 3 is a further improvement on the basis of Example 1.

[0046] The only difference from Example 2 is that Figure 5 As shown, the supporting leg 2 is an annular supporting leg 2c.

[0047] The advantage is that the bending action can be better limited to the radial and outward direction relative to the support base 1. In addition, the sensing element 4 can be made into a ring part, which enables the sensing element 4 to bend under pressure conditions And provide better comfort and larger skin contact area.

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Abstract

The invention discloses a half-dry electrode for bioelectrical signal sensing. The half-dry electrode comprises a supporting base, at least one supporting leg attached to the supporting base and extending from the supporting base, an ion slow release body and sensing elements arranged at the tail end of the supporting leg. The ion slow release body contains conductive liquid and slowly releases the conductive liquid to present the half-dry surface to a subject; at least part of the ion slow release body or the conductive liquid released by the ion slow release body is in contact with the sensing elements, and thus bioelectrical signals are transmitted to the sensing elements from the subject through the ion slow release body. The half-dry electrode is reasonable in structure, convenient and comfortable to use and good in contact with the skin, electrode-skin impedance is relatively low and stable, and signal quality is good.

Description

Technical field [0001] The invention belongs to the field of bioelectric technology, and specifically relates to a semi-dry electrode for bioelectric signal sensing, as well as its system and method. It is widely used in bioelectric recording, measurement, and stimulation, including medical equipment, mobile equipment, and home Health care, psychological cognition, games, brain-computer interface, rehabilitation training, etc. are especially suitable for EEG measurement. Background technique [0002] Currently, recording bioelectric signals such as electrocardiogram (EGG), brain electricity (EEG) or electromyography (EMG) routinely requires wet electrodes. Wet electrode refers to the electrode technology that needs to use more electrolyte to reduce the electrode skin impedance. Electrolytes used in wet electrodes can be divided into two categories: conductive fluid (such as conductive glue, conductive salt water) and conductive paste or viscous gel. Conductive fluid does not ha...

Claims

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Application Information

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IPC IPC(8): A61B5/0478
CPCA61B5/6814A61B5/6835A61B5/291
Inventor 李广利段晏文李明哲
Owner SUZHOU GREENTEK
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