阅读说明：本技术 一种脑电信号传感器 (Electroencephalogram signal sensor ) 是由 孙洁 于 2020-06-10 设计创作，主要内容包括：本发明提供了一种脑电信号传感器,属于传感器领域。本发明提供的脑电信号传感器包括：底座；电极支架,竖直地设置在底座上；信号电极,套设在电极支架上；弹性套筒,套设在信号电极外侧；电极导线,与信号电极电性连接；以及管线套,固定设置在底座的侧边缘处,其中,底座具有一个从信号电极处延伸至管线套处的导线腔,电极导线穿设在导线腔内并从管线套内穿出与脑电信号接收装置或电刺激信号生成装置电性连接。本发明提供的脑电信号传感器有效地增加了脑电信号传感器与使用者皮肤的接触面积,这不仅使得脑电信号传感器与使用者直接的摩擦力增强,不易脱落,还使得脑电信号传感器的密封性更好,导电介质不会外漏。(The invention provides an electroencephalogram signal sensor, and belongs to the field of sensors. The electroencephalogram signal sensor provided by the invention comprises: a base; the electrode bracket is vertically arranged on the base; the signal electrode is sleeved on the electrode bracket; the elastic sleeve is sleeved outside the signal electrode; the electrode lead is electrically connected with the signal electrode; and the pipeline sleeve is fixedly arranged at the side edge of the base, wherein the base is provided with a lead cavity extending from the signal electrode to the pipeline sleeve, and the electrode lead penetrates through the lead cavity and penetrates out of the pipeline sleeve to be electrically connected with the electroencephalogram signal receiving device or the electrical stimulation signal generating device. The electroencephalogram signal sensor provided by the invention effectively increases the contact area between the electroencephalogram signal sensor and the skin of a user, so that the direct friction force between the electroencephalogram signal sensor and the user is enhanced, the electroencephalogram signal sensor is not easy to fall off, the sealing performance of the electroencephalogram signal sensor is better, and a conductive medium cannot leak outwards.)

1. An EEG sensor for collecting EEG signals sent by a user at the head of the user and transmitting the EEG signals to an EEG signal receiving device or transmitting electrical stimulation signals generated by an electrical stimulation signal generating device to electrically stimulate the head of the user, the EEG sensor is characterized by comprising:

a base;

the electrode bracket is vertically arranged on the base;

the signal electrode is sleeved on the electrode bracket;

the elastic sleeve is sleeved outside the signal electrode;

the electrode lead is electrically connected with the signal electrode; and

a pipe sleeve fixedly arranged at the side edge of the base,

the base is provided with a lead cavity extending from the signal electrode to the pipeline sleeve, and the electrode lead penetrates through the lead cavity and penetrates out of the pipeline sleeve to be electrically connected with the electroencephalogram signal receiving device or the electrical stimulation signal generating device.

2. The brain electrical signal sensor of claim 1, wherein:

wherein the elastic sleeve comprises:

the base plate part is arranged above the base, and a through hole is formed in the middle of the base plate part;

a vertical part vertically disposed above the chassis part; and

the extension portion, one end with the top of vertical portion is connected, thereby the other end to keeping away from thereby the direction of vertical portion geometric center extends and makes the internal surface of extension portion with the contained angle that the internal surface of vertical portion formed is the obtuse angle.

3. The brain electrical signal sensor of claim 1, wherein:

wherein, the pipe casing includes:

the tail section is embedded in the base lead cavity;

one end of the middle section is connected with the tail section, and the outer diameter of the middle section is gradually reduced along the direction far away from the tail section; and

and the head section is connected with the other end of the middle section.

4. The brain electrical signal sensor of claim 3,

the tail section is a cuboid and is clamped in the base wire cavity.

5. The brain electrical signal sensor of claim 3,

wherein the intermediate section comprises:

the middle section main body is connected with the tail section at one end and connected with the head section at the other end;

the reinforcing ribs are circumferentially distributed on the outer surface of the middle section main body;

a plurality of stiffeners axially distributed on an outer surface of the mid-section body,

the two adjacent reinforcing blocks and the reinforcing rib positioned between the two adjacent reinforcing blocks form a middle section groove,

an inner groove is formed in each middle section groove.

6. The brain electrical signal sensor of claim 3,

the head section is in a quadrangular frustum pyramid shape, and one end with a larger surface area of the bottom surface of the head section is connected with the middle section.

7. The brain electrical signal sensor of claim 1, further comprising:

the sponge sleeve is sleeved outside the signal electrode and positioned inside the elastic sleeve;

the fixing sleeve is sleeved at the top end of the electrode support, a plurality of protruding spines are arranged on the outer surface of the fixing sleeve, and part of the protruding spines pierce the inner surface of the sponge sleeve.

8. The brain electrical signal sensor of claim 7, wherein:

the number of the convex thorns is four, and the convex thorns are circumferentially and uniformly distributed on the outer surface of the fixed sleeve.

9. The brain electrical signal sensor of claim 1, wherein:

wherein, the surface of the base is provided with a base groove for accommodating the signal electrode.

10. The brain electrical signal sensor of claim 1, wherein:

wherein the signal electrode is a powdered silver/silver chloride electrode.

Technical Field

The invention relates to the field of sensors, in particular to an electroencephalogram signal sensor.

Background

Electroencephalography (EEG) is a general reflection of electrophysiological activity of brain neurons on the surface of the cerebral cortex or scalp. The electroencephalogram signals contain a large amount of physiological and disease information, and in the aspect of clinical medicine, the electroencephalogram signals not only can provide diagnosis bases for certain brain diseases, but also provide effective treatment means for certain brain diseases through the latest electroencephalogram electrical stimulation technology.

Except for some occasions with low requirements on signal to noise ratio, the electroencephalogram signal sensor needs to use liquid electrolyte or electroencephalogram paste as a conductive medium, and because the liquid electrolyte is easy to volatilize, the conventional sensor has no way of sealing the conductive medium in the sensor well, so that the conductive medium is rapidly lost, and the signal quality under long-time use is difficult to ensure. Therefore, most electroencephalogram electrodes in the market only support one working mode of electroencephalogram paste, and cannot support liquid electrolyte at the same time. The traditional electroencephalogram electrode using the electroencephalogram paste also does not have a sealing structure, and the working mode is that the conductive paste is directly coated on the sensor to contact with scalp, so that the phenomenon of overflowing to the periphery is easy to occur in the extrusion process, and bridging is generated with other electrodes. The electrode has high hardness and is not comfortable when being directly contacted with the scalp.

With the development of the technology, the latest technology at present enables the electroencephalogram signal sensor to be used for detecting the electroencephalogram signals of the user and also can be used for carrying out electrical stimulation treatment on the user. The requirement of electrical stimulation compatibility on an electroencephalogram signal sensor is high, in order to guarantee stimulation accuracy, the requirement of direct current offset potential current on some indexes such as direct current and alternating current impedance is higher than that on some common electroencephalogram application occasions, and a plurality of electroencephalogram signal sensors on the market cannot be used for electrical stimulation at the same time. If a liquid electrolyte is used as a conductive medium, the electrode corrosion can be caused by long-time soaking of the liquid electrolyte, and the corrosion is accelerated by applying current to disable the sensor, which puts high requirements on the use of the material of the sensor and the design of the structural seal. The existing electroencephalogram signal sensors are made of various materials, have large signal quality difference, and mostly only support electroencephalogram paste but not simultaneously support liquid electrolyte. At present, no electroencephalogram signal sensor on the market can achieve high signal quality, is compatible with liquid electrolyte and electroencephalogram paste, is corrosion-resistant, and is compatible with electrical stimulation.

The existing sensor electrode and the lead are usually welded in a heterogeneous mode, polarization potential can be formed between the sensor electrode and the lead in the process of electrical stimulation treatment, the effect of electrical stimulation can be influenced, and the sensor can be corroded rapidly to cause failure.

In the prior art, better electrodes mainly comprise Ag/AgCl plated electrodes and powder die-cast Ag/AgCl electrodes, wherein the powder die-cast Ag/AgCl electrodes have better using effect, but are difficult to form, difficult to be made into various specific shapes like metal or plastic materials, difficult to enlarge the contact area between sponge and electrodes when liquid electrolyte is used, and difficult to realize sponge fixation, thereby causing difficult assembly firmness.

Disclosure of Invention

The invention is made to solve the above problems, and aims to provide an electroencephalogram signal sensor which is stable and clear in signal, compatible with liquid electrolyte and conductive paste, simple and convenient to switch, good in sealing effect, free from overflow of conductive medium, free from loss, compatible with electrical stimulation and corrosion resistant,

the invention provides an electroencephalogram signal sensor which is characterized by being arranged on the head of a user to collect an electroencephalogram signal sent by the user and transmit the electroencephalogram signal to an electroencephalogram signal receiving device or an electrical stimulation signal generated by an electrical stimulation signal generating device to electrically stimulate the head of the user, and the electroencephalogram signal sensor comprises: a base; the electrode bracket is vertically arranged on the base; the signal electrode is sleeved on the electrode bracket; the elastic sleeve is sleeved outside the signal electrode; the electrode lead is electrically connected with the signal electrode; and the pipeline sleeve is fixedly arranged at the side edge of the base, wherein the base is provided with a lead cavity extending from the signal electrode to the pipeline sleeve, and the electrode lead penetrates through the lead cavity and penetrates out of the pipeline sleeve to be electrically connected with the electroencephalogram signal receiving device or the electrical stimulation signal generating device.

The electroencephalogram signal sensor provided by the present invention may further have the following characteristics: wherein, elastic sleeve includes: the chassis part is arranged above the base, and a through hole is formed in the middle of the chassis part; a vertical part vertically disposed above the chassis part; and the extending part is connected with the top end of the vertical part at one end, and the other end extends to the direction far away from the geometric center of the vertical part, so that the included angle formed by the inner surface of the extending part and the inner surface of the vertical part is an obtuse angle.

The electroencephalogram signal sensor provided by the present invention may further have the following characteristics: wherein, the pipe line cover includes: the tail section is embedded in the base lead cavity; one end of the middle section is connected with the tail section, and the outer diameter of the middle section is gradually reduced along the direction far away from the tail section; and a head section connected to the other end of the middle section.

The electroencephalogram signal sensor provided by the present invention may further have the following characteristics: wherein, the tail section is cuboid and is clamped in the base wire cavity.

The electroencephalogram signal sensor provided by the present invention may further have the following characteristics: wherein, the interlude includes: one end of the middle section main body is connected with the tail section, and the other end of the middle section main body is connected with the head section; the reinforcing ribs are circumferentially distributed on the outer surface of the middle section main body; a plurality of bosses, axial distribution are on the surface of interlude main part, and two adjacent bosses constitute an interlude recess with the strengthening rib that is located between two adjacent bosses, have seted up an inner groovy in every interlude recess.

The electroencephalogram signal sensor provided by the present invention may further have the following characteristics: wherein, the head section is in the shape of a quadrangular frustum pyramid, and one end with larger surface area of the bottom surface is connected with the middle section.

The electroencephalogram signal sensor provided by the present invention may further have the following feature: the sponge sleeve is sleeved outside the signal electrode and positioned inside the elastic sleeve; the fixed sleeve is sleeved at the top end of the electrode support, the outer surface of the fixed sleeve is provided with a plurality of protruding spines, and a part of the protruding spines penetrates into the inner surface of the sponge sleeve.

The electroencephalogram signal sensor provided by the present invention may further have the following characteristics: wherein, the quantity of bayonet is four, and the circumference evenly distributes at the fixed sleeve surface.

The electroencephalogram signal sensor provided by the present invention may further have the following characteristics: wherein, the surface of the base is provided with a base groove for accommodating the signal electrode.

The electroencephalogram signal sensor provided by the present invention may further have the following characteristics: wherein the signal electrode is a powder silver/silver chloride electrode.

Action and Effect of the invention

According to the electroencephalogram signal sensor, the electrode lead penetrates out of the side face of the base, and the pipeline sleeve is used, so that the electrode lead is not bent in the using process, and the service life of the electrode lead can be effectively prolonged.

According to the electroencephalogram signal sensor, the electrode and the electrode lead are welded, the welding part is located in the base lead cavity, and due to the use of the pipeline sleeve, the welding part can be sealed in the base lead cavity, the welding part is protected from being stressed, and the welding part is not easy to break.

According to the electroencephalogram signal sensor, the elastic sleeve is sleeved on the outer side of the signal electrode, so that the contact area between the electroencephalogram signal sensor and the skin of a user is effectively increased, the direct friction force between the electroencephalogram signal sensor and the user is enhanced, the electroencephalogram signal sensor is not easy to fall off, the sealing performance of the electroencephalogram signal sensor is better, and the conductive medium cannot overflow or lose.

Drawings

Fig. 1 is a schematic perspective view of a brain electrical signal sensor according to embodiment 1 of the present invention;

fig. 2 is a plan view of a brain electrical signal sensor in embodiment 1 of the present invention;

FIG. 3 is a cross-sectional view of the electroencephalogram sensor of FIG. 2 of the present invention in the direction of A-A;

fig. 4 is a schematic structural view of a signal electrode in embodiment 1 of the present invention;

FIG. 5 is a schematic view showing the structure of an elastic sleeve in example 1 of the present invention;

fig. 6 is a schematic structural view of a wire cover in embodiment 1 of the present invention.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is specifically described below by combining the embodiment and the attached drawings.

< example 1>

Fig. 1 is a schematic perspective view of a brain electrical signal sensor according to embodiment 1 of the present invention. Fig. 2 is a plan view of the electroencephalogram signal sensor in embodiment 1 of the present invention. Fig. 3 is a sectional view of the electroencephalogram signal sensor in embodiment 1 of the present invention.

As shown in fig. 1-3, an electroencephalogram signal sensor 100, comprising: a base 11, an electrode support 12, a signal electrode 13, an elastic sleeve 14, an electrode lead (not shown), a pipe sleeve 15, a sponge sleeve 16 and a fixed sleeve 17.

The base 11 is disc-shaped, and a circular groove is formed in the center of one surface of the base 11, and an opening is formed in the circular groove. The side of the base 11 also has an opening. The opening on the side surface of the base 11 is communicated with the opening at the circular ring-shaped groove, so that a lead cavity for penetrating the electrode lead is formed inside the base 11.

The electrode holder 12 is disposed at the center of the circular groove of the base 11 and perpendicular to the base 11. In the present embodiment, the electrode holder 12 is integrally formed with the base 11.

Fig. 4 is a schematic structural view of a signal electrode in embodiment 1 of the present invention.

As shown in fig. 4, the signal electrode 13 includes an electrode body 131 and a conductive silver wire 132.

The electrode body 131 is cylindrical and is sleeved on the electrode support 12, and the bottom of the electrode body 131 is embedded in the annular groove on the surface of the base 11. In this embodiment, the electrode body 131 has a height of 5mm, an outer diameter of 5mm and an inner diameter of 3mm, and is a powdered silver/AgCl electrode.

One end of the conductive silver wire 132 is fixed in the electrode body 131, and the other end is inserted in the wire cavity and is bound with the electrode wire.

Fig. 5 is a schematic view of the structure of an elastic sleeve in embodiment 1 of the present invention.

As shown in fig. 5, the elastic sleeve 14 includes: a chassis portion 141, a vertical portion 142, and an extended portion 143.

The chassis part 141 is disposed outside the signal electrode 13, and has a through hole in the middle for the electrode body 131 to pass through. The vertical portion 142 is disposed perpendicular to the chassis portion 141. The extension 143 has one end connected to the top end of the vertical portion 142 and the other end extending away from the geometric center of the vertical portion 142, so that the inner surface of the extension 143 forms an obtuse angle with the inner surface of the vertical portion 142. The inner surface at the tip of the extension 143 is turned outward to form an arc-shaped surface. In the present embodiment, the elastic sleeve 14 is made of TPE.

The sponge sleeve 16 is sleeved outside the signal electrode 13 and is positioned in the elastic sleeve 14. The bottom of the sponge sleeve 16 is disposed above the bottom plate portion 141 of the elastic sleeve 14. In the present embodiment, the sponge sleeve 16 is made of PVA sponge.

The fixing sleeve 17 is annular and is sleeved on the top end of the electrode bracket 12. Four convex thorns are uniformly distributed on the circumference of the fixed sleeve 17. A part of the front end of each projection pierces into the inner surface of the sponge sleeve 16, thereby fixing the sponge sleeve against falling out. In other embodiments, other numbers of the protruding spines can be arranged according to actual requirements.

One end of the electrode lead is bound with the conductive silver wire 132, penetrates out of the lead cavity and the pipeline sleeve 15, and is electrically connected with the electroencephalogram signal receiving device or the electrical stimulation signal generating device. In this embodiment, the electrode lead includes a silver-plated copper lead and a PVC lead case for wrapping the silver-plated copper lead.

Fig. 6 is a schematic structural view of a wire cover in embodiment 1 of the present invention.

As shown in fig. 6, the pipe line cover 15 is disposed at the side opening of the pipe line cavity of the base 11, and includes: an aft section 151, an intermediate section 152, and a head section 153.

The tail section 151 is a cuboid clamped in the wire cavity. The size of the tail section 151 is slightly larger than the size of the interior space of the guidewire lumen, such that the tail section 151 cannot be easily pulled out of the guidewire lumen. In other embodiments, the shape of the tail section 151 is limited to a rectangular parallelepiped, and other shapes, such as a sphere or a hemisphere, may be selected according to practical requirements.

The intermediate section 152 includes an intermediate section body 152a, four reinforcing bars 152b, and three reinforcing blocks 152 c.

The middle section main body 152a has a cylindrical shape, and has one end connected to the tail section 151 and the other end connected to the head section 153.

Four reinforcing ribs 152b are uniformly and vertically provided circumferentially on the outer surface of the intermediate section main body 152 a. Each of the ribs 152b extends along the length of the main body 152a of the intermediate section, and the height of each of the ribs 152b relative to the main body 152a of the intermediate section gradually decreases in the direction from the end section 151 to the head section 153. Each rib 152b forms a right angle groove with an adjacent rib 152b and the outer surface of the middle section body 152a, forming four right angle grooves.

Three reinforcing blocks 152c are axially vertically provided on the outer surface of the intermediate section main body 152 a. Each stiffener 152c includes four arcuate segments that are disposed within the four right angle channels, respectively. The height of each arc-shaped block is the same as the height of the reinforcing rib 152b at the position thereof. In the present embodiment, since one of the reinforcing blocks 152c is disposed at the end of the right-angle groove closest to the tail section 151, the three reinforcing blocks 152c divide each right-angle groove into three right-angle groove sections. An L-shaped inner groove is formed in the middle of each right-angle groove section, which is closer to the tail section 151, and the opening direction of the inner groove is the same as that of the right-angle groove in which the inner groove is located. In other embodiments, the shape and number of the reinforcing blocks can be selected according to actual requirements.

The head section 153 has a quadrangular frustum pyramid shape, and the end having a large surface area on the bottom surface thereof is connected to the intermediate section 152. In other embodiments, the head section 153 is not necessary, and the head section may not be provided according to actual requirements.

The application method of the electroencephalogram signal sensor 100 provided by the embodiment comprises the following steps:

s1, filling saturated saline solution into the sponge sleeve 16, enabling the sponge sleeve 16 to absorb water and expand to fill the space between the sponge sleeve 16 and the outer surface of the signal electrode 13 and the space between the sponge sleeve 16 and the inner surface of the elastic sleeve 14;

s2, the electroencephalogram signal sensor 100 is turned over, so that the outward turned surface in the extension portion 143 of the elastic sleeve 14 is attached to the head of a user;

and S3, electrically connecting the electrode lead with the electroencephalogram signal receiving device or the electrical stimulation signal generating device, and then using the electrode lead.

Effects and effects of the embodiments

According to the EEG signal sensor that this embodiment is related to, because be provided with the elastic sleeve that the cover was established in the signal electrode outside to the internal surface of this elastic sleeve top department outwards overturns, so, the EEG signal sensor that this embodiment provided has increased the area of contact of EEG signal sensor and user skin effectively, and this not only makes EEG signal sensor and the direct frictional force of user strengthen, is difficult for droing, still makes EEG signal sensor's leakproofness better, and salt solution can not leak and volatilize outward.

According to the electroencephalogram signal sensor, due to the use of the base, the groove, the elastic sleeve, the electrode support, the fixing sleeve and the convex thorns, the contact area of the powder die-cast silver/silver chloride and the sponge is enlarged, the defect that the powder die-cast silver/silver chloride can only be processed into a simple shape is effectively overcome, the sponge can be firmly fixed, and the assembly is convenient and rapid.

According to the electroencephalogram signal sensor, due to the use of the fixing sleeve, the liquid electrolyte and the electroencephalogram paste can be quickly switched.

According to the electroencephalogram signal sensor, the electrode lead penetrates out of the side face of the base, so that bending is not needed in the using process, and the service life of the electrode lead can be effectively prolonged.

According to the electroencephalogram signal sensor related to the embodiment, the pipeline sleeve is arranged at the side edge of the base and is provided with the four reinforcing ribs and the three reinforcing blocks, so that the pipeline sleeve still keeps high strength under the condition that a large amount of materials are saved, electrode leads extending out of the base can be well protected, and the service life of the electrode leads can be effectively prolonged.

According to the electroencephalogram signal sensor related to the embodiment, because the sponge sleeve is directly sleeved outside the signal electrode, the contact area between the sponge sleeve and the signal electrode is greatly increased, and the contact area between the sponge sleeve and the signal electrode is doubled compared with that of a traditional electroencephalogram signal sensor, so that the transmission of electroencephalogram signals is more stable and clear.

According to the electroencephalogram signal sensor related to the embodiment, the signal electrode is provided with the electrode body made of the powder silver/silver chloride material and the conductive silver wire, so that the electrode body and the conductive silver wire are made of the same material, no polarization potential is generated in the process of electrical stimulation, and the service life of the signal electrode is effectively prolonged. The traditional electroencephalogram signal electrode is a silver-plated/silver chloride electrode, the lead is a tin-plated copper lead, and the silver-plated/silver chloride electrode and the tin-plated copper lead are welded. Compared with the signal electrode with the same size, the direct current impedance of the signal electrode of the embodiment is reduced to below 0.1 ohm from 2 ohm, and the direct current bias voltage is reduced to below 200 mu V from 5mV-100 mV.

According to the EEG signal sensor that this embodiment is related to, because the elastic sleeve's that uses material is TPE, the material is soft, so the user wears very comfortablely at the in-process that uses.

< example 2>

An electroencephalogram signal sensor, comprising: the device comprises a base, an electrode bracket, a signal electrode, an elastic sleeve, an electrode lead and a pipeline sleeve.

The structure of the electroencephalogram signal sensor provided by this embodiment is substantially the same as the electroencephalogram signal sensor 100 provided by embodiment 1, and the difference is only that there is no sponge sleeve and no fixing sleeve, so the details are not described here.

The application method of the electroencephalogram signal sensor provided by the embodiment comprises the following steps:

s1, filling conductive paste between the elastic sleeve and the signal electrode;

s2, the electroencephalogram signal sensor is turned over to enable the outward-turned surface in the extension portion of the elastic sleeve to be attached to the head of a user;

and S3, electrically connecting the electrode lead with the electroencephalogram signal receiving device or the electrical stimulation signal generating device, and then using the electrode lead.

Effects and effects of the embodiments

According to the electroencephalogram signal sensor related to the embodiment, the elastic sleeve is arranged on the outer side of the signal electrode in a sleeved mode, and the inner surface of the top end of the elastic sleeve is turned outwards, so that the contact area between the electroencephalogram signal sensor and the skin of a user is effectively increased, the electroencephalogram signal sensor provided by the embodiment not only enables the friction force between the electroencephalogram signal sensor and the skin of the user to be enhanced and not prone to falling off, but also enables the sealing performance of the electroencephalogram signal sensor to be better, and the conductive paste cannot overflow.

According to the electroencephalogram signal sensor, the electrode lead penetrates out of the side face of the base, so that bending is not needed in the using process, and the service life of the electrode lead can be effectively prolonged.

According to the EEG signal sensor that this embodiment is related to, because have the pipe line cover of setting in base side edge to the pipe line cover has four strengthening ribs and three boss, so the pipe line cover still keeps high strength under the condition that has saved a large amount of materials, not only can protect the electrode wire that extends from the base well, also can have the life of effective extension electrode wire.

According to the electroencephalogram signal sensor related to the embodiment, the signal electrode is provided with the electrode body made of the powder silver/silver chloride material and the conductive silver wire, so that the electrode body and the conductive silver wire are made of the same material, no polarization potential is generated in the process of electrical stimulation, and the service life of the signal electrode is effectively prolonged.

The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.