CN110192857B

CN110192857B - Brain signal acquisition device and method

Info

Publication number: CN110192857B
Application number: CN201910588566.3A
Authority: CN
Inventors: 徐永美; 杨龙江
Original assignee: First Affiliated Hospital of Army Medical University
Current assignee: First Affiliated Hospital of Army Medical University
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2023-06-06
Anticipated expiration: 2039-07-02
Also published as: CN110192857A

Abstract

The invention relates to brain signal acquisition equipment and a brain signal acquisition method, which belong to the technical field of test equipment, and comprise an electrode, a pre-fixing device and a final fixing device, wherein the pre-fixing device comprises a fixing body, the fixing body is a flexible thin block, an inwards concave electrode fixing groove is formed in one side surface of the flexible thin block, a fastening groove component is formed in the other side surface of the flexible thin block, the final fixing device comprises a transverse fixing component and a longitudinal fixing belt, and the transverse fixing component comprises a left side piece, a right side piece and a fastening wire harness I connected between the left side piece and the right side piece; the longitudinal fixing belt comprises a front side sheet and a rear side sheet and a fastening harness II connected between the front side sheet and the rear side sheet. The invention adopts a pre-fixing and final fixing combined mode, and the fixing reliability is enhanced, thereby ensuring the accuracy of the detection position and the detection result; meanwhile, the invention has higher comfort, so that the subject can fall asleep, and further can be used for a long time, and the adaptability of the invention is obviously improved.

Description

Brain signal acquisition device and method

Technical Field

The invention relates to the technical field of test equipment, in particular to brain signal acquisition equipment and a brain signal acquisition method.

Background

Physiological and pathological information of the subject can be obtained by collecting brain electrical signals through brain electrodes. During acquisition, conductive paste is smeared on the brain electrode to increase the contact level with a subject and improve the transmission intensity of brain electrical signals. To obtain a stable brain signal, an effective fixation of the brain electrode is also required.

The prior art has no pre-fixing measure before fixing, and although the smeared conductive paste has certain viscosity and has certain bonding effect with the head, the conductive paste can not reach the pre-fixing effect due to the irregularity of the shape of the head of a human body, so that the problem that the test result is influenced by displacement exists during real fixing.

In addition, the prior art is basically fixed, and the size can not be adjusted, so that the adaptability is poor. Even though the size of the frame and the slider structure can be adjusted, the frame and the slider structure are not comfortable and cannot be used for a long time because the frame and the slider are placed on the head, so that the subject cannot fall asleep.

The inventor performs electroencephalogram test work for a long time, performs intensive analysis and research on the electroencephalogram test work, and through a large number of experiments, provides brain signal acquisition equipment and a brain signal acquisition method, can perform better pre-fixation and fixation on electrodes, has higher comfortableness, and provides assistance for further improving the test accuracy and comfortableness of brain electrodes.

Disclosure of Invention

In view of the above, the present invention aims to provide a brain signal acquisition device and a brain signal acquisition method, which can effectively perform reliable pre-fixation and fixation on brain electrodes, and have high comfort, so as to solve the problem that the prior art has no pre-fixation and thus has poor testing accuracy and adaptability.

One of the invention is realized by the following technical scheme:

the brain signal acquisition equipment comprises an electrode, a pre-fixing device and a final fixing device,

the pre-fixing device comprises a fixing body, the fixing body is a flexible thin block, an inwards concave electrode fixing groove is arranged on one side surface of the flexible thin block, a fastening groove component is arranged on the other side surface of the flexible thin block,

the bottom of the electrode fixing groove is pressed against the arc-shaped top of the electrode, the depth of the electrode fixing groove is slightly lower than the height of the electrode,

the flexible thin block is externally and penetratingly provided with an electrode wire avoiding gap along the center of the electrode fixing groove,

the final fixing device comprises a transverse fixing component and a longitudinal fixing belt, wherein the transverse fixing component comprises a left side piece, a right side piece and a fastening wire harness I connected between the left side piece and the right side piece; the longitudinal fixing belt comprises a front side piece, a rear side piece and a fastening harness II connected between the front side piece and the rear side piece; the fastening wire harness I and the fastening wire harness II are pressed on the fastening groove component to be fixed,

the left side piece and the right side piece are provided with ear openings which are in shape with auricles of a human body,

the fixing body, the left side piece, the right side piece, the front side piece and the back side piece are all made of silica gel or latex or cloth or cotton, and are provided with a bonding layer which is bonded with scalp,

the fastening wire harness I and the fastening wire harness II are made of elastic materials.

Further, a water absorption isolation layer is arranged between the electrode fixing groove and the bonding layer, and the water absorption isolation layer comprises water absorption cotton in annular arrangement and a plastic film arranged on the periphery of the water absorption cotton.

Further, the fastening groove component comprises a transverse component and a longitudinal component, the transverse component and the longitudinal component both comprise two fastening seats, wire harness clamping grooves with the same direction are formed in the two fastening seats, and the wire harness clamping groove directions of the two components are mutually perpendicular.

Further, the four fastening seats are uniformly distributed on the same diameter of the flexible thin block, which is expanded along the periphery at the center of the flexible thin block.

Further, the fastening seat comprises a base fixed with the flexible thin block and a form embedded on the base

An insert made of metal material is shaped, said insert being +.>

The two sides of the shape extend to the respective outer sides to form O-shaped extending bodies, a long seam is formed between the two O-shaped extending bodies, and the long seam and +.>

The shape space forms the wire harness clamping groove.

Further, the fastening wire harness I and the fastening wire harness II are composed of two single wires, and any single wire is correspondingly clamped in a wire harness clamping groove.

Further, five fastening wire harnesses I and five fastening wire harnesses II are respectively arranged.

Further, five fastening pencil I distribute in the longitudinal direction of head, left side piece and right side piece are provided with T type spout with the tip that fastening pencil I is connected correspondingly, fastening pencil I's tip is provided with the T type slider with T type spout sliding fit.

Further, five fastening pencil II disperse setting is in the lateral direction of head, and is located the outside and is close to being provided with the connection piece between the ear two respectively with be located three fastening pencil I in the centre, be provided with the elastic bulge that is used for compressing tightly fixed body on the connection piece.

The second invention is realized by the following technical scheme:

the acquisition method of the brain signal acquisition equipment is characterized by comprising the following steps of: the method comprises the following steps:

1) Fixing the electrode and connecting the electrode with the information terminal by using a lead;

2) Wiping the conductive paste;

3) Fixing the pre-fixing device;

4) Fixing terminal fixing device:

i. fixing a left side piece or a right side piece, embedding a fastening wire harness I into a wire harness clamping groove, and then fixing the right side piece or the left side piece;

ii. Fixing the front side piece or the rear side piece, embedding the fastening wire harness II into the wire harness clamping groove, and then fixing the rear side piece or the front side piece;

5) Reading an electroencephalogram signal;

6) And (3) finishing.

The invention has the beneficial effects that:

according to the invention, the brain electrode is effectively pre-fixed through the pre-fixing device, and then the final fixing device is used for final fixing, so that the loosening, shifting and even falling off of the electrode in the installation and detection processes are effectively prevented, the reliability and the firmness of the fixing are enhanced, and the accuracy of the detection position and the detection result is ensured; meanwhile, as the fixing body, the left side piece, the right side piece, the front side piece and the rear side piece are all made of silica gel or latex or cloth or cotton, the comfort is high, so that a subject can fall asleep, and the adaptability is obviously improved after long-time use; in addition, through the mode that elasticity pencil was fixed, can reduce fixed area, reduce the influence of hair to fixed, can further promote fixed effect.

Drawings

Fig. 1 is a schematic structural view of the present embodiment;

FIG. 2 is a schematic front cross-sectional view of a pre-fixation device;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic front cross-sectional view of the stationary body;

FIG. 5 is a top view of FIG. 4;

FIG. 6 is a bottom view of FIG. 4;

FIG. 7 is a front view of the left side panel;

FIG. 8 is a top view of FIG. 7;

FIG. 9 is a cross-sectional view of FIG. 8;

FIG. 10 is a front view of the connection tab;

FIG. 11 is a top view of FIG. 11;

fig. 12 is another schematic view of a longitudinal fastening strip.

Marking:

1-an electrode; 2-a pre-fixing device; 3-final fixation means; 4-fixing the body; 5-electrode fixing grooves; 6-bonding layer; 7-electrode wire avoiding gap; 8-a transverse fixing assembly; 9-a longitudinal fixing belt; 10-left side panel; 11-right side panel; 12-fastening the wire harness I; 13-front side panels; 14-rear side panels; 15-fastening the wire harness II; 16-ear opening; 17-a transverse assembly; 18-a longitudinal assembly; 19-a fastening seat; 191-a base; 192-inserts; 193-O-shaped extensions; 20-a wire harness clamping groove; 21-T-shaped sliding groove; 22-T-shaped sliding blocks; 23-metal sliding grooves; 24-metal head; 25-connecting pieces; 26-elastic protrusions; 27-absorbent cotton; 28-plastic film; 29-a deformation layer; 30-plastic protective film.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the foregoing description of the invention, it should be noted that the azimuth or positional relationship indicated by the terms "one side", "the other side", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "identical" and the like do not denote that the components are identical, but rather that there may be minor differences. The term "perpendicular" merely means that the positional relationship between the components is more perpendicular than "parallel" and does not mean that the structure must be perfectly perpendicular, but may be slightly tilted.

As shown in fig. 1 to 12, the brain signal acquisition device of the present embodiment includes an electrode 1, a pre-fixing device 2 and a final fixing device 3, where the electrode of the present embodiment is a disk electrode, and when in use, conductive paste is coated on the bottom of the disk electrode, so as to increase the conductive capacity, thereby enhancing the transmission level of electrical signals and reducing the signal attenuation.

The pre-fixing device of this embodiment includes a fixing body 4, the fixing body is a flexible thin piece, be provided with the electrode fixed slot 5 of indent on one side of flexible thin piece, be provided with the fastening groove subassembly on another side of flexible thin piece, be provided with tie coat 6 on the electrode fixed slot outer border, the size of electrode fixed slot suits with the electrode, can put into the electrode, therefore, it should be bigger than the electrode, simultaneously, the degree of depth of fixed slot needs slightly to be less than the height of electrode fixed position, in this way, when fixed, the bottom of electrode fixed slot is pressed and is leaned on the arc top of electrode, make fixing body have certain deflection and certain elasticity restoring force, compress tightly the electrode fixedly, the tie coat of this embodiment is provided with the binder, can fix fixing body and head skin bonding.

The term "slightly lower" in this embodiment does not mean a specific value, and may be any value between 0 and 2mm, as long as the electrode is fixed.

In this embodiment, the fixing body is a flexible thin block, can be deformed, is comfortable to attach to a human body, has a certain elastic restoring force, can fix the electrode, is not limited by materials of the fixing body, and can be made of silica gel, latex, cloth, cotton or the like.

In this embodiment, be provided with electrode line on the flexible thin piece and dodge the gap 7, electrode line dodges the gap and link up the setting outward along the center of electrode fixed slot, dodges the gap through the electrode and can avoid the electrode wire, prevents to interfere, influences bonding quality.

The final fixing device of the embodiment comprises a transverse fixing component 8 and a longitudinal fixing belt 9, wherein the transverse fixing component comprises a left side sheet 10, a right side sheet 11 and a fastening wire harness I12 connected between the left side sheet and the right side sheet; the longitudinal fixing band comprises a front side piece 13 and a rear side piece 14 and a fastening harness II15 connected between the front side piece and the rear side piece; the fastening wire harness I and the fastening wire harness II are both pressed on the fastening groove component to be fixed.

Likewise, like the fixing body, the left side piece, the right side piece, the front side piece and the rear side piece of the embodiment can also be made of silica gel or latex or cloth or cotton, and an adhesive layer for bonding with the scalp is also arranged, and the adhesive layer is provided with an adhesive, so that the fixing body can be respectively bonded and fixed with the skin of the head, and then a plurality of independent fixing positions are formed, so that the fixing effect is improved.

In addition, because the special structure of human ear can not compress tightly the pencil and fix on the ear, consequently, in this embodiment, set up an ear opening 16 on left side piece and right side piece, ear opening and human auricle looks form, can avoid human ear to be fixed in human ear periphery when the installation, can improve human ear.

Of course, for easy disassembly and assembly, the left and right side panels need only partially surround the earroots, and need not be of full-circle construction.

In this embodiment, fastening pencil I and fastening pencil II all adopt elastic material to make when fixed, have certain elasticity, improve fixed effect.

The elastic material of the present embodiment may be rubber, latex, or the like.

In this embodiment, the fastening groove assembly includes a transverse assembly 17 and a longitudinal assembly 18, the transverse assembly and the longitudinal assembly each include two fastening seats 19, and two fastening seats are provided with wire harness clamping grooves 20 with the same direction, and the wire harness clamping grooves of the two assemblies are mutually perpendicular, four fastening seats are uniformly distributed on the same diameter of the flexible thin block extending along the periphery, namely, two wire harness clamping grooves are equidistantly arranged in the longitudinal direction and the transverse direction, and the fastening wire harness I and the fastening wire harness II are formed by two single wires, any single wire is correspondingly clamped in a wire Shu Kacao, so that two fixing points can be respectively formed in the longitudinal direction and the transverse direction, and the fixing force is balanced and stable.

The embodiment adopts the transverse fixing component to carry out transverse fixing, adopts the longitudinal fixing component to carry out longitudinal fixing, and forms crossed fixing from two directions, so that the fixing is firm and reliable, and the two are not interfered with each other after one another, thereby avoiding the problem of intertwining.

As a modification of the present embodiment, the fastening seat comprises a base 191 and an insert 192, the base is integrally provided with the flexible thin block or is connected and fixed together by a fastener, the insert is embedded on the base, and is made of metal material and has the appearance

Shape, at the same time +.>

The two sides of the shape are respectively extended to the outer sides to form O-shaped extending bodies 193, a long seam is formed between the two O-shaped extending bodies, and the long seam and +.>

The shape space constitutes the pencil draw-in groove promptly, during the use, the single line passes through long seam card and goes into the pencil draw-in groove and fix, and this kind of structure firstly has certain intensity, and secondly can prevent to deviate from, uses reliably.

As an improvement of the present embodiment, five fastening harnesses I are provided, and the five fastening harnesses I are distributed in the longitudinal direction of the head and arranged according to a certain rule, such as: one of the base lines is arranged between the binaural forepits, the other two lateral lines are arranged on two sides of the base line, the other two lateral lines are arranged on the outer sides of the lateral lines, and the distance between the two lateral lines is not limited. The counter electrode is fixed along the transverse direction of the head, the end parts of the left side piece and the right side piece, which are connected with the fastening wire harness I, are correspondingly provided with T-shaped sliding grooves 21, and the end part of the fastening wire harness I is provided with T-shaped sliding blocks 22 which are in sliding fit with the T-shaped sliding grooves. Through the slip of T type slider in T type spout, can adjust the interval between the fastening pencil I to adapt to the head of equidimension not. The T-shaped chute can be a small section or a whole section, and the embodiment is preferably a small section mode, so that the T-shaped chute can be adjusted in a certain range and can mutually interfere with each other, and the installation efficiency and the test efficiency are improved.

Meanwhile, a metal chute 23 is arranged in the T-shaped chute, and a metal head 24 is arranged on the T-shaped sliding block, so that the metal head slides in the metal chute during use, the good structural force can be provided, the binding force is ensured, and the service life is longer.

As an improvement of this embodiment, five fastening harnesses II are also provided, and the five fastening harnesses II are distributed in the longitudinal direction of the head and arranged according to a certain rule, such as: one of the two lateral lines is arranged on two sides of the base line, and the other two lateral lines are arranged on the outer sides of the lateral lines, so that the distance between the two lateral lines is not limited. The connecting piece 25 is arranged at the position between the three fastening wire harnesses I in the middle of the two outer side wires, the elastic bulge 26 for pressing the fixing body is arranged on the connecting piece, and the traction effect of the transverse assembly on the left side piece and the right side piece can be reduced through the dispersion effect of the connecting piece, so that the problem that the fixing force is insufficient due to the influence of the structure of the human ear is further reduced.

The connecting sheet can be made of cotton cloth, gauze, etc., and the elastic protrusions can be made of various materials such as silica gel or latex, etc.

Of course, the fastening harness II may be configured as an integral structure as the fastening harness I, that is, the front side panels of all the longitudinal fixing strips are combined into one body, and the rear side panels are combined into one body, so that the fastening harness I is only required to be bonded and fixed once, as shown in fig. 12.

In this embodiment, a water-absorbing partition layer is provided between the electrode fixing groove and the adhesive layer, the water-absorbing partition layer includes water-absorbing cotton 27 and a plastic film 28, and the plastic film is provided between the water-absorbing cotton and the adhesive layer. When the adhesive is fixed, the absorbent cotton can absorb the conductive paste, the plastic film can isolate the adhesive layer from the conductive paste, the conductive paste is prevented from damaging the adhesive layer, and the adhesive effect is ensured.

In this embodiment, a deformation layer 29 made of an elastic material is further provided between the adhesive layer and the flexible body. The material of the deformable layer is not limited, and may be rubber, latex, or silica gel. When the elastic deformation of the holder body is insufficient, the deformation layer can improve the deformation level, thereby enhancing the pressing force and quality.

In this embodiment, in order to secure the adhesive effect of the adhesive layer, a plastic protective film 30 is provided on the adhesive layer.

The bonding layer in the embodiment can also adopt 3M adhesive, has stronger bonding effect, has good affinity to human body and is not easy to cause allergy.

The acquisition method of the brain signal acquisition equipment comprises the following steps:

1) Firstly connecting an electrode with a computer by using a lead wire, then coating conductive paste in an electrode disc, then pressing the electrode on a test point, and confirming the direction of the lead wire before pressing at least to ensure that the lead wire is not parallel or perpendicular to the central line of the head, namely, is not in the longitudinal direction or the transverse direction of the head;

2) Wiping the conductive paste with cloth or cotton yarn;

3) Pre-fixing: tearing the plastic protective film, sleeving the electrode fixing groove of the fixing body into the electrode, and pressing and bonding the electrode to the head downwards to finish pre-fixing;

4) Final fixation:

i. firstly, bonding and fixing a left side piece at a specified position, embedding a fastening wire harness I into a wire harness clamping groove, and then bonding and fixing a right side piece;

ii. The front side piece is bonded and fixed at a specified position, then the fastening wire harness II is embedded into the wire harness clamping groove, and then the rear side piece is bonded and fixed;

in the step i, the right side piece can be fixed first, and then the left side piece can be fixed; in step ii, the back side sheet may be fixed first, and then the front side sheet may be fixed;

5) The brain electrical signal is read through a computer;

6) And (5) completing the acquisition of the brain electrical signals.

According to the embodiment, the brain electrode is effectively pre-fixed through the pre-fixing device, and then the final fixing device is used for final fixing, so that loosening, shifting and even falling off of the electrode in the installation and detection processes are effectively prevented, the reliability and the firmness of fixing are enhanced, and the accuracy of the detection position and the detection result is ensured; meanwhile, as the fixing body, the left side piece, the right side piece, the front side piece and the rear side piece are all made of silica gel or latex or cloth or cotton, the comfort is high, so that a subject can fall asleep, and the adaptability is obviously improved after long-time use; in addition, through the mode of elastic wire harness fixation, the fixation area can be reduced, the influence of hair on fixation is reduced, and the fixation effect can be further improved

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.

Claims

1. Brain signal acquisition equipment, including the electrode, its characterized in that: also comprises a pre-fixing device and a final fixing device,

the flexible thin block is provided with an electrode wire avoiding gap in an outward penetrating way along the center of the electrode fixing groove,

the fastening wire harness I and the fastening wire harness II are made of elastic materials,

the fastening groove component comprises a transverse component and a longitudinal component, the transverse component and the longitudinal component both comprise two fastening seats, wire harness clamping grooves with the same direction are arranged on the two fastening seats, the wire harness clamping grooves of the two components are mutually perpendicular,

the fastening seat comprises a base fixed with the flexible thin block and a form embedded on the base

An insert made of metal material is shaped, said insert being +.>

The shape space forms the wire harness clamping groove,

the fastening wire harness I and the fastening wire harness II are composed of two single wires, and any single wire is correspondingly clamped in a wire harness clamping groove.

2. The brain signal collection device according to claim 1, wherein: the electrode fixing groove is provided with a water absorption isolation layer between the electrode fixing groove and the bonding layer, and the water absorption isolation layer comprises water absorption cotton in annular arrangement and a plastic film arranged on the periphery of the water absorption cotton.

3. The brain signal collection device according to claim 1, wherein: the four fastening seats are uniformly distributed on the circumference of the same diameter of the center of the flexible thin block.

4. The brain signal collection device according to claim 1, wherein: five fastening wire harnesses I and five fastening wire harnesses II are respectively arranged.

5. The brain signal collection device according to claim 4, wherein: five fastening pencil I distribute in the longitudinal direction of head, left side piece and right side piece are provided with T type spout with the tip that fastening pencil I is connected corresponds, fastening pencil I's tip is provided with the T type slider with T type spout sliding fit.

6. The brain signal collection device according to claim 4, wherein: five fastening pencil II disperse setting is in the transverse direction of head, and is located the outside and is close to being provided with the connection piece between the ear two respectively with be located three fastening pencil I in the centre, be provided with the elastic bulge that is used for compressing tightly fixed body on the connection piece.

7. The acquisition method of a brain signal acquisition device according to any one of claims 1 to 6, characterized in that: the method comprises the following steps:

2) Wiping the conductive paste;

3) Fixing the pre-fixing device;

4) Fixing terminal fixing device:

5) Reading an electroencephalogram signal;

6) And (3) finishing.