CN115590519A - Forehead electroencephalogram signal acquisition device based on flexible electrodes - Google Patents

Abstract

The invention discloses a forehead electroencephalogram signal acquisition device based on a flexible electrode, which comprises a flexible electrode belt and an electroencephalogram signal acquisition host, wherein the flexible electrode belt comprises a fabric belt component and an adjusting belt component, and the fabric belt component and the adjusting belt component are connected to form an annular headband structure; the fabric belt component comprises a flexible fabric and foam, the flexible fabric is provided with an inner cavity, and the foam is positioned in the inner cavity; the cotton inboard of bubble is the inlayer wall of flexible fabric, and the cotton outside of bubble is the outer wall of flexible fabric, is equipped with the flexible dry electrode of a plurality of metal on the inlayer wall, and outer wall is connected with brain electrical signal collection host computer, and the flexible dry electrode of metal is connected through the circuit electric connection that switches on that passes the fabric band spare with brain electrical signal collection host computer. The forehead electroencephalogram signal acquisition device based on the flexible electrodes is comfortable to wear and portable; the electroencephalogram signal acquisition accuracy is high.

Description

Forehead electroencephalogram signal acquisition device based on flexible electrodes

Technical Field

The invention relates to the technical field of intelligent hardware, in particular to a forehead electroencephalogram signal acquisition device based on a flexible electrode.

Background

The electroencephalogram signal is the synthesis of local neuron electrical activity recorded from intracranial or extracranial scalp of a brain, contains rich physiological information, can be used for evaluating the attention and the relaxation degree of a wearer, and can also be used in the fields of detection and treatment of brain diseases and intelligent control.

At present, the most common electroencephalogram signal acquisition is provided with an electroencephalogram cap and an acquisition system which are suitable for dry/wet electrodes; and the other part adopts wearable electroencephalogram acquisition equipment with a hard structural form. An electroencephalogram cap type acquisition system is usually provided with an electrode lead with a certain length between an electroencephalogram cap and an electroencephalogram signal acquisition host except for the electroencephalogram cap, the preparation work before use is complicated, and the electrode lead with the certain length can be easily interfered by electric signals in a use environment in the use process, so that some unnecessary noises are generated on the acquired electroencephalogram signals, especially the radiation of 50/60Hz power frequency signals and some radio frequency signals existing in the use environment can be easily conducted into the electroencephalogram signal acquisition system through the electrode lead, and because the spontaneous electroencephalogram signals are very weak and usually only have dozens of uV, the interference signals introduced by the coupling of the electrode lead can cover the electroencephalogram signals to be acquired, so that the quality of the acquired electroencephalogram signals is reduced, and great troubles are brought to the extraction and analysis of the electroencephalogram signals at the later stage; some wearable electroencephalogram equipment adopting a hard structure form have poor user experience and poor suitability in unspecified people due to the fact that the basic structure form is a hard structure, the head of a human body is in an irregular form such as a round shape or an oval shape, and the head circumference size is different.

Disclosure of Invention

The invention mainly aims to provide a forehead electroencephalogram signal acquisition device based on a flexible electrode, and aims to solve the problems that electroencephalograms in an existing electroencephalogram signal acquisition system are prone to interference and poor in wearing comfort.

In order to solve the technical problems, the invention adopts the technical scheme that: a forehead electroencephalogram signal acquisition device based on a flexible electrode comprises a flexible electrode belt and an electroencephalogram signal acquisition host, wherein the flexible electrode belt comprises a fabric belt component and an adjusting belt component, and the fabric belt component and the adjusting belt component are connected to form an annular headband structure; the fabric strip assembly comprises a flexible fabric and foam, the flexible fabric is provided with an inner cavity, and the foam is positioned in the inner cavity; the inner side of the foam is an inner wall of the flexible fabric, the outer side of the foam is an outer wall of the flexible fabric, a plurality of metal flexible dry electrodes are arranged on the inner wall, the outer wall is connected with the electroencephalogram signal acquisition host, and the metal flexible dry electrodes are electrically connected with the electroencephalogram signal acquisition host through a conduction circuit penetrating through the fabric belt assembly.

The invention has the beneficial effects that:

this forehead EEG signal acquisition device based on flexible electrode has the cyclic annular bandeau structure that is formed by the fabric band subassembly and adjusts the band subassembly and connect for forehead EEG signal acquisition device can be adapted to different users' head circumference size, has improved the travelling comfort and the portability that forehead EEG signal acquisition device based on flexible electrode wore effectively.

The elastic recovery force of the foam makes the metal flexible dry electrode on the inner wall of the flexible fabric fully and effectively contact with the forehead skin of a user, and the accuracy of electroencephalogram signal acquisition is improved while the wearing comfort of the forehead electroencephalogram signal acquisition device based on the flexible electrode is further improved.

The traditional exposed electrode lead for electroencephalogram signal conduction between the electrode and the host is abandoned, and accordingly signal attenuation caused by introduction of the electrode lead and radiation interference of use environment power frequency and other electrical signals are reduced, so that the acquired electroencephalogram signals are more stable, the environmental noise interference is less, and the effect of further improving the accuracy of electroencephalogram signal acquisition is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a forehead electroencephalogram signal acquisition device based on a flexible electrode according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another view angle of the flexible electrode-based forehead electroencephalogram signal acquisition device according to the embodiment of the present invention;

FIG. 3 is an exploded view of a fabric belt assembly in a flexible electrode based forehead electrical signal acquisition device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of the forehead electroencephalogram signal acquisition device based on the flexible electrode according to the embodiment of the present invention (after hiding the electroencephalogram signal acquisition host);

FIG. 5 is a schematic structural diagram of an electroencephalogram signal acquisition host in the flexible electrode-based forehead electroencephalogram signal acquisition device according to the embodiment of the present invention;

FIG. 6 is a schematic diagram of the internal structure of the electroencephalogram signal acquisition host in the flexible electrode-based forehead electroencephalogram signal acquisition device according to the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a fixing boss in the forehead electroencephalogram signal acquisition device based on a flexible electrode according to the embodiment of the present invention;

fig. 8 is a schematic diagram of the internal structure of a fixing boss in the forehead electroencephalogram signal acquisition device based on a flexible electrode according to the embodiment of the present invention;

fig. 9 is a schematic structural diagram of a charging storage box according to an embodiment of the invention.

The reference numbers illustrate:

1. a flexible electrode strip; 11. a fabric tape assembly; 111. a flexible fabric; 1111. an inner wall; 1112. an outer wall; 112. soaking cotton; 12. an adjusting band assembly; 13. a metal flexible dry electrode; 14. fixing the boss; 141. a first electrically conductive structure; 142. a headband bottom shell; 1421. a metal conductive layer; 143. a headband face shell; 144. an FPC assembly; 145. a second magnetic attraction member;

2. an electroencephalogram signal acquisition host; 21. a second electrically conductive structure; 22. a second positioning structure; 23. a housing; 24. a host battery; 25. a host control board; 26. a warning component; 27. a first magnetic attraction member;

3. a charging storage box; 31. a case body; 32. a box cover; 33. an inner support; 34. a third electrically conductive structure; 35. a control key; 36. and an indicator light.

Detailed Description

The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if the present invention relates to directional indications such as up, down, left, right, front and back 823082308230, 8230, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture as shown in the drawings, and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In addition, the appearance of "and/or" throughout this document is meant to encompass three scenarios, such as "and/or" including a scenario, or a scenario that is satisfied simultaneously. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

Examples

Referring to fig. 1 to 9, an embodiment of the present invention is: referring to fig. 1 to 3, a forehead electroencephalogram signal acquisition device based on a flexible electrode comprises a flexible electrode strip 1 and an electroencephalogram signal acquisition host machine 2, wherein the flexible electrode strip 1 comprises a fabric strip assembly 11 and an adjusting strip assembly 12, and the fabric strip assembly 11 and the adjusting strip assembly 12 are connected to form an annular headband structure; the fabric strip assembly 11 comprises a flexible fabric 111 and foam 112, the flexible fabric 111 has an inner cavity, the foam 112 is located in the inner cavity, and preferably, the foam 112 is a memory sponge; in the wearing process, the fabric belt component 11 has a certain elastic deformation space, so that the flexible electrode belt 1 can be conveniently adapted to different head types; the inboard of bubble cotton 112 is the inlayer wall 1111 of flexible fabric 111, the outside of bubble cotton 112 is the outer wall 1112 of flexible fabric 111, be equipped with the flexible dry electrode 13 of a plurality of metal on the inlayer wall 1111, outer wall 1112 is connected with electroencephalogram signal acquisition host computer 2, the flexible dry electrode 13 of metal with electroencephalogram signal acquisition host computer 2 is through passing the circuit electric connection that switches on of fabric belt subassembly 11.

As shown in fig. 2, optionally, the metal flexible dry electrode 13 is printed on the inner side surface of the inner layer wall 1111, and the metal flexible dry electrode 13 uses the flexible fabric 111 as a carrier, so that the metal flexible dry electrode can be better attached to the forehead of the head of a user, thereby solving the problems of poor head adaptability and poor contact reliability between the electrode and the skin of the electroencephalogram signal acquisition device with a partially hard structure. In this embodiment, the number of the metal flexible dry electrodes 13 is seven, a certain distance is provided between two adjacent metal flexible dry electrodes 13, and preferably, the seven metal flexible dry electrodes 13 are arranged in a row at equal intervals. In this embodiment, the standard 10% electrode configuration method is set at the installation position of the metal flexible dry electrode 13, and optionally, the positions of seven metal flexible dry electrodes 13 are defined as F7, AF7, fp1, fpz, fp2, AF8, and F8 from left to right. The metal flexible dry electrode 13 can be directly contacted with the skins of the forehead of the user, so that the forehead electroencephalogram signal acquisition application of the calibration electrode position is realized; in addition, different positions of the flexible metal dry electrodes 13 on the inner layer wall 1111 are defined, so that the method is also suitable for electroencephalogram signal acquisition application of other self-defined electrode positions on the forehead. For example, the position is worn at the head peripheral position on user's ear to flexible electrode belt 1, sets for flexible electrode belt 1 and presses when the naked skin of ear's upper edge, also can be used to ear's brain electrical signal collection.

Referring to fig. 1, 4, 5, and 7, a fixing boss 14 is disposed on the outer layer wall 1112, a first electrical conduction structure 141 is disposed on the fixing boss 14, the conduction line is electrically connected to the first electrical conduction structure 141, the electroencephalogram signal collecting host 2 is detachably connected to the fixing boss 14, and a second electrical conduction structure 21 for matching with the first electrical conduction structure 141 is disposed on the electroencephalogram signal collecting host 2. The flexible electrode belt 1 and the electroencephalogram signal acquisition host machine 2 are separated, so that the electroencephalogram signal acquisition host machine 2 can be matched with different flexible electrode belts 1 for use, and the electroencephalogram signals of different metal flexible dry electrodes 13 on different flexible electrode belts 1 can be acquired by a user through the same electroencephalogram signal acquisition host machine 2 by means of the flexible electrode belt 1 with the position of the metal flexible dry electrode 13 adjusted, so that a simple and effective expansion way is provided for electroencephalogram application under different scenes and different application targets.

Referring to fig. 1, fig. 2, fig. 7 and fig. 8, in detail, the fixing boss 14 includes a headband bottom shell 142 and a headband face shell 143 connected to each other, the headband bottom shell 142 is located on an inner side of the outer layer wall 1112, the headband face shell 143 is located on an outer side of the outer layer wall 1112, and the first electrically conductive structure 141 is disposed on the headband face shell 143. For further improving the wearing travelling comfort of forehead EEG signal acquisition device based on flexible electrode, preferably, the medial surface of bandeau drain pan 142 is indent arc, so, can let 1 front portions of flexible electrode area constitute one with the adaptation radian that user's head matches. Optionally, the fixing boss 14 is integrally arc-shaped.

Referring to fig. 4 and 5, a first positioning structure is disposed on the fixing boss 14, and a second positioning structure 22 matched with the first positioning structure is disposed on the electroencephalogram signal collecting host 2, in this embodiment, a positioning groove serving as the first positioning structure is disposed on an edge of the headband casing 143, and a positioning convex ring serving as the second positioning structure 22 is disposed on an edge of an inner side of the electroencephalogram signal collecting host 2. In other embodiments, the first positioning structure may also be in other structural forms, such as a positioning column, a positioning hole, and the like.

Referring to fig. 1, 4, 7 and 8, preferably, the headband shell 143 has an outer convex arc portion, and the inner side of the electroencephalogram signal acquisition host 2 has an inner concave arc portion matching with the outer convex arc portion, so that when the electroencephalogram signal acquisition host 2 is combined with the fixed boss 14 for use, the contact surfaces of the two can be naturally matched in place, no gap can be formed between the contact surfaces of the two, and displacement of the contact surfaces can be effectively reduced by limiting the concave and convex surfaces.

Referring to fig. 2 and fig. 7, as a preferred embodiment, a metal conductive layer 1421 is disposed on an inner side and/or an outer side of the headband bottom shell 142, the metal conductive layer 1421 is electrically connected to a ground structure in the electroencephalogram signal acquisition host 2, and at least a portion of the metal flexible dry electrode 13 is disposed corresponding to the metal conductive layer 1421. The metal conducting layer 1421 electrically connected to the ground structure in the electroencephalogram signal acquisition host 2 can effectively isolate and shield the interference of external electrical signals on the metal flexible dry electrode 13, thereby further improving the accuracy of the electroencephalogram signal acquisition result. In this embodiment, the inner side surface of the headband bottom shell 142 is plated with a layer of the metal conductive layer 1421, and the metal conductive layer 1421 is connected with a ground structure in the electroencephalogram signal acquisition host 2 through a contact point, so as to form a complete ground plane, thereby forming a ground shielding layer for protecting the metal dry electrode printed on the inner side surface of the flexible electrode band 1 from radiation interference of environmental electrical signals and other radio frequency electrical signals, and ensuring the purity of the electroencephalogram signal acquired by the metal flexible dry electrode 13.

As shown in fig. 8, a strip-shaped headband FPC assembly 144 is disposed in the fixing boss 14, each of the metal flexible dry electrodes 13 is electrically connected to the headband FPC assembly 144, and the first electrically conductive structure 141 is electrically connected to the FPC assembly 144. Each of the metal flexible dry electrodes 13 can be electrically connected to the headband FPC assembly 144 nearby, that is, the connection position of each of the metal flexible dry electrodes 13 and the headband FPC assembly 144 is different, so that external signal interference and signal interference between the metal flexible dry electrodes 13 can be further reduced.

Referring to fig. 5 and fig. 6, specifically, the electroencephalogram signal acquisition host 2 includes a casing 23, and a host battery 24 and a host control board 25 respectively disposed in the casing 23, the second electrically conductive structure 21 and the second positioning structure 22 are both disposed on the casing 23, and the second electrically conductive structure 21 and the battery are respectively electrically connected to the host control board 25.

Referring to fig. 1, 4 and 5, the first electrical conduction structure 141 includes a first signal contact conduction structure, the second electrical conduction structure 21 includes a second signal contact conduction structure matched with the first signal contact conduction structure, and the second signal contact conduction structure is electrically connected to the host control board 25. After the first signal contact conduction structure is in contact conduction with the second signal contact conduction structure, the electroencephalogram signals collected by the metal flexible dry electrode 13 can be transmitted to the host control board 25. In this embodiment, the first signal contact conduction structure is a first contact point for electroencephalogram signal conduction, and the second signal contact conduction structure is a first elastic thimble matched with the first contact point. When the electroencephalogram signal acquisition host 2 is used in combination with the flexible electrode strip 1, forehead electroencephalogram signals collected by the surface coupling of the metal flexible dry electrode 13 on the flexible electrode strip 1 can be conducted into the electroencephalogram signal acquisition host 2; in the middle, the traditional electrode lead for conducting the electroencephalogram signals is prevented from being used between the metal flexible dry electrode 13 and the electroencephalogram signal acquisition host 2, and accordingly, the signal attenuation caused by the introduction of the electrode lead and the radiation interference of the power frequency of the use environment and other electrical signals are reduced, so that the acquired electroencephalogram signals are more stable, and the environmental noise interference is less.

Further, the first electrical conduction structure 141 further includes a first control contact conduction structure, and the second electrical conduction structure 21 includes a second control contact conduction structure matched with the first control contact conduction structure, and the second control contact conduction structure is electrically connected to the host control board 25. When first control contact conduction structure and the contact of second control contact conduction structure switch on the back, the automatic start of brain electrical signal collection host computer 2, first control contact conduction structure still has played the effect of judging whether brain electrical signal collection host computer 2 is connected well with flexible electrode strip 1 with the cooperation of second control contact conduction structure promptly, when first control contact conduction structure and second control contact conduction structure contact failure, brain electrical signal collection host computer 2 can not automatic start, this forces the user to readjust the position of brain electrical signal collection host computer 2, do benefit to the job stabilization nature of guaranteeing flexible electrode based forehead brain electrical signal collection system. In this embodiment, the first control contact conduction structure is a second contact point for feeding back a conduction signal, and the second control contact conduction structure is a second elastic thimble matched with the second contact point.

As shown in fig. 6, optionally, a warning component 26 is further disposed in the casing 23, and the warning component 26 is electrically connected to the host control board 25. In this embodiment, the warning component 26 is a motor, and in other embodiments, the warning component 26 may also be a warning lamp component, an electroacoustic transducer component, or the like. Work as EEG signal collection host computer 2 breaks away from fixed boss 14, promptly when host control board 25 detect the second control contact conduction structure with the disconnection of first control contact conduction structure switches on the back, warning subassembly 26 sends warning signals such as vibration, light, sound to after certain length of presetting, EEG signal collection host computer 2 automatic shutdown.

In this embodiment, the host control board 25 is provided with a pre-filter circuit, a signal amplifier circuit, a 24-bit ADC chip, a PLL phase-locked loop circuit, an MCU control module and a bluetooth wireless transmission module, which are connected in sequence, the electroencephalogram acquisition host couples the electroencephalogram signals acquired from the metal flexible dry electrode 13 to perform filtering and amplification processing, and performs digital conversion and sampling through the built-in 24-bit ADC chip, the microprocessor (MCU control module) preprocesses the sampled 24-bit digital electroencephalogram signals, and sends the acquired original digital electroencephalogram signals and the electroencephalogram signals after certain preprocessing to an upper computer such as a mobile phone or a PC through a bluetooth transmission path with low power consumption, so as to allow the upper computer to perform further data analysis processing and application.

The fixed boss 14 is connected with the electroencephalogram signal acquisition host 2 in a buckling mode, a magnetic suction mode or a magic tape mode. Referring to fig. 6 and 8, in this embodiment, the fixing boss 14 is magnetically connected to the electroencephalogram signal collection host 2, specifically, a first magnetic member 27 is disposed on the electroencephalogram signal collection host 2, and a second magnetic member 145 magnetically engaged with the first magnetic member 27 is disposed on the fixing boss 14, more specifically, the number of the first magnetic members 27 is plural, and the plural magnetic members are arranged in a circle along the edge of the housing 23, so that the stability of connection between the fixing boss 14 and the electroencephalogram signal collection host 2 can be ensured. In this embodiment, the number of the first magnetic attraction pieces 27 is six, and in other embodiments, the number of the first magnetic attraction pieces 27 may also be one or other numbers.

The first magnetic attraction member 27 and/or the second magnetic attraction member 145 are permanent magnets. Of course, it is also possible to use an electromagnet for the first magnetic element 27 and/or the second magnetic element 145.

In addition, under the circumstances of convex arc portion and concave arc portion complex, fixed boss 14 with electroencephalogram signal acquisition host 2 adopts magnetism to inhale the cooperation, makes fixed boss 14 with electroencephalogram signal acquisition host 2 both can the automatic correction relative position to make first electrical property conducting structure 141 and second electrical property conducting structure 21 contact better and switch on, further facilitate for user's use, do benefit to reinforcing user's use and experience.

As shown in fig. 1 to 3, as a preferred embodiment, the adjusting band assembly 12 is an elastic band with adjustable length, the length of the elastic band is adjusted to enable the whole flexible electrode band 1 to be used by users with different head circumference sizes, and the preset head circumference size that can be adapted by adjusting the length of the elastic band is between 480MM and 620MM, so that the wearing use of most people with different head circumference sizes can be satisfied; meanwhile, the elastic band has a certain telescopic force, the contraction stress generated by the elastic force on the flexible electrode band 1 can enable the metal flexible dry electrode 13 printed on the front side to contract towards the forehead skin direction, so that the surface of the metal flexible dry electrode 13 can be fully and effectively contacted with the forehead skin, and the reliability and the stability of the electroencephalogram signals acquired through the flexible electrode band 1 are further ensured.

As can be confirmed from the above description, the flexible electrode strip 1 has four stages of adaptive adjustment mechanisms through the above structural configuration innovation and the adjustment coordination among the components:

1. the front side of the flexible electrode belt 1 is integrally provided with an arc-shaped fixed boss 14, and the front part of the flexible electrode belt 1 is supported to form an adaptive radian matched with the head of a user;

2. the front flexible fabric 111 is embedded with a flexible memory sponge with a certain thickness, a natural radian clinging to the skin of the head of a user can be formed after the front flexible fabric is worn, the embedded memory sponge provides a certain front and back deformation space, and meanwhile, a micro-pressure structure is formed on the forehead skin through weak recovery elasticity of the embedded memory sponge, so that the surface of the metal flexible dry electrode 13 can be more fully contacted with the forehead skin of the user;

3. the whole length of the elastic band can be adjusted by the rear elastic band in a single-side and double-side length adjusting mode (similar to the length adjusting mode of a shoulder strap with adjustable length in a single-shoulder bag), so that the single side of the elastic band can be adjusted to occupy more for people with large head circumference, otherwise, the head circumference with a slightly smaller head circumference can be adjusted to occupy more double sides of the elastic band, and the whole length size of the flexible electrode band 1 can be conveniently adjusted, so that the flexible electrode band is suitable for being worn with different head circumference sizes;

4. the elastic band has certain stretching and retracting strain force, when the elastic band is adjusted to a proper length to be worn, the retracting force of the elastic band enables the flexible electrode band 1 to be worn on the head area of a user comfortably, the retracting stress can pull the metal flexible dry electrode 13 attached to the front fabric band to lean towards the scalp direction, and the elastic band only provides a tying force attached to the head and also provides an adhesive force attached to the skin for the forehead metal flexible dry electrode 13.

As shown in fig. 9, in practical applications, the forehead electroencephalogram signal acquisition device based on the flexible electrode may further include a charging storage box 3, and the charging storage box 3 not only facilitates storage of the electroencephalogram signal acquisition host 2, but also provides a backup charging function for the electroencephalogram signal acquisition host 2, so that the service life of the electroencephalogram signal acquisition host 2 can be doubled and prolonged.

Specifically, the charging storage box 3 includes a box body 31 and a box cover 32 which can be opened and closed, the box body 31 is provided with an inner support 33 therein, and preferably, the structure of the inner support 33 is the same as that of the headband shell 143. Interior support 33 with the bottom internal surface of box body 31 surrounds out and holds the chamber, it is equipped with the charging control board to hold the intracavity, interior support 33 be equipped with second electrical property conduction structure 21 complex third electrical property conduction structure 34, optional, third electrical property conduction structure 34 with first electrical property conduction structure 141 structure is the same. The box body 31 is further provided with a charging interface which is electrically communicated with the charging control panel. Optionally, a rechargeable battery electrically connected to the charging control board is further disposed in the accommodating cavity, and the rechargeable battery is a storage battery and used for charging the host battery 24. It will be readily appreciated that when the user utilizes the charging interface to connect to the external power source, the rechargeable battery and the host battery 24 may be charged simultaneously, or the host battery 24 may be charged first and then the rechargeable battery may be charged.

Still be equipped with on the box body 31 and be used for control whether charge function's control key 35 is opened to storage box 3 charges, control key 35 with charge control panel electric connection. Optionally, the box body 31 is further provided with an indicator light 36 electrically connected to the charging control board, and the indicator light 36 is used for indicating a charging state and/or a remaining capacity of the rechargeable battery or other information.

For preventing that the brain electrical signal gathers host computer 2 accident and breaks away from the storage box 3 that charges, interior support 33 or hold the intracavity and still be equipped with piece 27 complex third magnetism is inhaled to first magnetism.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. The utility model provides a forehead EEG signal acquisition device based on flexible electrode which characterized in that: the electroencephalogram signal acquisition device comprises a flexible electrode belt and an electroencephalogram signal acquisition host, wherein the flexible electrode belt comprises a fabric belt component and an adjusting belt component, and the fabric belt component and the adjusting belt component are connected to form an annular headband structure; the fabric belt assembly comprises a flexible fabric and foam, the flexible fabric is provided with an inner cavity, and the foam is positioned in the inner cavity; the inner side of the foam is the inner wall of the flexible fabric, the outer side of the foam is the outer wall of the flexible fabric, a plurality of metal flexible dry electrodes are arranged on the inner wall, the outer wall is connected with the electroencephalogram signal acquisition host, and the metal flexible dry electrodes are electrically connected with the electroencephalogram signal acquisition host through conducting circuits penetrating through the fabric belt assembly.

2. The flexible electrode-based forehead electroencephalogram signal acquisition device according to claim 1, wherein: the brain electrical signal acquisition device is characterized in that a fixing boss is arranged on the outer wall, a first electrical conduction structure is arranged on the fixing boss, the conduction circuit is electrically connected with the first electrical conduction structure, the brain electrical signal acquisition host is detachably connected with the fixing boss, and a second electrical conduction structure matched with the first electrical conduction structure is arranged on the brain electrical signal acquisition host.

3. The flexible electrode-based forehead electroencephalogram signal acquisition device according to claim 2, wherein: the fixed boss comprises a headband bottom shell and a headband face shell which are connected, the headband bottom shell is located on the inner side of the outer layer wall, the headband face shell is located on the outer side of the outer layer wall, and the first electric conduction structure is arranged on the headband face shell.

4. The flexible electrode-based forehead EEG signal acquisition device according to claim 3, wherein: the inner side and/or the outer side of the headband bottom shell are/is provided with metal conducting layers, the metal conducting layers are electrically conducted with a ground structure in the electroencephalogram signal acquisition host, and at least part of the metal flexible dry electrodes are arranged corresponding to the metal conducting layers.

5. The flexible electrode-based forehead electroencephalogram signal acquisition device according to claim 2, wherein: the fixing boss is internally provided with a strip-shaped head belt FPC assembly, each metal flexible dry electrode is respectively electrically conducted with the head belt FPC assembly, and the first electrical conduction structure is electrically conducted with the FPC assembly.

6. The flexible electrode-based forehead electroencephalogram signal acquisition device according to claim 2, wherein: the brain electrical signal acquisition host computer includes the casing and locates respectively host computer battery, the host computer control panel in the casing, second electrical property conducting structure locates on the casing, second electrical property conducting structure reaches the battery respectively with host computer control panel electric connection.

7. The flexible electrode-based forehead electroencephalogram signal acquisition device according to claim 6, wherein: the first electrical conduction structure comprises a first signal contact conduction structure, the second electrical conduction structure comprises a second signal contact conduction structure matched with the first signal contact conduction structure, and the second signal contact conduction structure is electrically connected with the host control board.

8. The flexible electrode-based forehead electroencephalogram signal acquisition device according to claim 7, wherein: the first electrical conduction structure further comprises a first control contact conduction structure, the second electrical conduction structure comprises a second control contact conduction structure matched with the first control contact conduction structure, and the second control contact conduction structure is electrically connected with the host control board.

9. The flexible electrode-based forehead electroencephalogram signal acquisition device according to claim 2, wherein: the fixed boss is connected with the electroencephalogram signal acquisition host through a buckle, a magnetic attraction connection or a magic tape.

10. The flexible electrode-based forehead electroencephalogram signal acquisition device according to claim 1, wherein: the adjusting belt component is an elastic belt with adjustable length.

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