CN219183789U

CN219183789U - Electroencephalogram signal acquisition device

Info

Publication number: CN219183789U
Application number: CN202222115698.4U
Authority: CN
Inventors: 马旭岩; 张智慧
Original assignee: Sichuan Jinjiazheng Medical Instrument Co ltd; Jiangsu Apon Medical Technology Co ltd
Current assignee: Sichuan Jinjiazheng Medical Instrument Co ltd; Jiangsu Apon Medical Technology Co ltd
Priority date: 2022-08-11
Filing date: 2022-08-11
Publication date: 2023-06-16
Anticipated expiration: 2032-08-11

Abstract

The application provides an electroencephalogram signal acquisition device relates to the electroencephalogram signal and gathers technical field, include: a protective housing, and a flexible electrode body and a signal processing assembly assembled within the protective housing; the flexible electrode body comprises a bearing part and an electrode contact, a first side of the bearing part is connected with the signal processing assembly, a second side of the bearing part is provided with the electrode contact, and the first side and the second side are opposite sides; the electrode contact is kept away from the one end of adapting portion is provided with the slick and sly portion, the protecting sheathing have with electrode contact looks sheathed tube chamber pipe, electrode contact's length is greater than the length of chamber pipe, the slick and sly portion is located outside the chamber pipe, the slick and forth portion is used for gathering the brain electrical signal, signal processing circuit is used for handling the brain electrical signal, protects the flexible electrode body through setting up the protecting sheathing, can improve the life of flexible electrode body.

Description

Electroencephalogram signal acquisition device

Technical Field

The application relates to the technical field of electroencephalogram signal acquisition, in particular to an electroencephalogram signal acquisition device.

Background

The electroencephalogram is the overall reflection of the electrophysiological activity of brain nerve cells on the surface of cerebral cortex or scalp, and the electroencephalogram displayed by the electroencephalogram contains a large amount of physiological and disease information, so that the electroencephalogram processing can provide diagnosis basis for certain brain diseases and also provide effective treatment means for certain brain diseases in clinical medicine.

In the prior art, the brain electrical signals are acquired by using the contact of the electrodes and the skin of the brain of a human body, so that the brain electrical signals are acquired, but the existing brain electrical acquisition device lacks protection of the electrodes, so that the service life of the electrodes is not long.

Disclosure of Invention

Accordingly, an object of the present application is to provide an electroencephalogram signal acquisition device, which can solve the existing problems in a targeted manner.

Based on the above-mentioned purpose, the present application provides an electroencephalogram signal acquisition device, include: a protective housing, and a flexible electrode body and a signal processing assembly assembled within the protective housing; the flexible electrode body comprises a bearing part and an electrode contact, a first side of the bearing part is connected with the signal processing assembly, a second side of the bearing part is provided with the electrode contact, and the first side and the second side are opposite sides; the electrode contact is far away from the one end of adapting portion is provided with the rounding off portion, the protective housing have with electrode contact looks overlapping cavity pipe, electrode contact's length is greater than the length of cavity pipe, the rounding off portion is located outside the cavity pipe, the rounding off portion is used for gathering the brain electrical signal, signal processing circuit is used for handling the brain electrical signal.

Optionally, the signal processing component comprises a circuit board and a signal processing circuit arranged on the circuit board, and the signal processing circuit is used for processing the electroencephalogram signals collected by the electrode contacts; the circuit board is provided with conductive through holes and bonding pads, the first side of the bearing part is provided with a first protruding part and a second protruding part, the first protruding part penetrates through the conductive through holes, the second protruding part is in contact with the bonding pads and is used for transmitting brain electrical signals collected by the electrode contacts to the signal processing circuit, and the first protruding part is used for fixing the circuit board.

Optionally, the signal processing circuit includes an operational amplifier and a connection terminal; the positive electrode input end of the operational amplifier is connected with the conductive through hole and the bonding pad through a first resistor, the negative electrode input end of the operational amplifier is connected with the output end of the operational amplifier, the output end of the operational amplifier is connected with the connecting terminal through a second resistor, and the connecting terminal is used for being connected with an electroencephalogram expansion device.

Optionally, the first protruding part is a cylinder, the second protruding part is a round table, and a first preset slope is arranged at one end of the first protruding part far away from the bearing part; the side face of the second protruding portion is provided with a second preset slope.

Optionally, the surfaces of the conductive through holes and the bonding pads are provided with a gold deposition layer.

Optionally, the protective housing includes a first protective housing and a second protective housing that are detachably mounted; the cavity tube is positioned in the first protective shell, the first protective shell further comprises a main cavity body, the main cavity body is used for accommodating the bearing part and the signal processing component, and the main cavity body and the cavity tube are integrally formed; the first side of the second protective housing is provided with a third protruding portion, and the third protruding portion is used for fixing the signal processing component.

Optionally, the diameter of the end of the main lumen adjacent to the lumen is smaller than the diameter of the end of the main lumen remote from the lumen.

Optionally, the second protective shell is provided with a wire outlet hole, and the wire outlet hole is used for leading out a wire connected with the signal processing component; the side wall of the wire outlet hole is provided with a screwing part, and the screwing part is used for connecting electroencephalogram expansion equipment.

Optionally, the second side of the second protective shell is provided with an assembly aid.

Optionally, the diameter of the electrode contact in a first direction is gradually reduced, wherein the first direction is a direction extending from a connection point of the electrode contact and the receiving part to the round part.

Overall, the advantages of the present application and the experience brought to the user are:

provided is an electroencephalogram signal acquisition device, which comprises: the flexible electrode body comprises a bearing part and an electrode contact, the first side of the bearing part is connected with the signal processing assembly, the second side of the bearing part is provided with the electrode contact, the electrode contact is used for collecting brain electrical signals, one end of the electrode contact, far away from the bearing part, is provided with a smooth part, the protective housing is provided with a cavity tube sleeved with the electrode contact, the length of the electrode contact is larger than that of the cavity tube, and the smooth part is located outside the cavity tube. The flexible electrode body is protected by the protective shell, and the service life of the flexible electrode body is prolonged.

Drawings

In the drawings, the same reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily drawn to scale. It is appreciated that these drawings depict only some embodiments according to the disclosure and are not therefore to be considered limiting of its scope.

Fig. 1 shows a schematic structural diagram of an electroencephalogram signal acquisition device of the present application;

fig. 2 shows an overall effect schematic of an electroencephalogram signal acquisition device according to an embodiment of the present application;

fig. 3 shows a schematic structural diagram of a flexible electrode body of an electroencephalogram signal acquisition apparatus according to an embodiment of the present application;

fig. 4 shows a schematic structural diagram of a signal processing component of an electroencephalogram signal acquisition device according to an embodiment of the present application;

fig. 5 shows a circuit diagram of a signal processing circuit of the electroencephalogram signal acquisition apparatus according to the embodiment of the present application;

fig. 6 shows a schematic structural diagram of a first protective case of an electroencephalogram signal acquisition apparatus according to an embodiment of the present application;

fig. 7 shows a schematic structural diagram of a second protective case of the electroencephalogram signal acquisition apparatus of the present application.

Detailed Description

The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the present utility model are shown in the drawings.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

An application scenario of the embodiment of the disclosure is an electroencephalogram data acquisition scenario, and provides an electroencephalogram data acquisition device which acquires human brain cortex signals through a flexible electrode body and is provided with a protective shell, the flexible electrode body is protected through the protective shell, and the service life of the flexible electrode body is prolonged.

Fig. 1 shows a schematic structural diagram of an electroencephalogram signal acquisition device of the present application. Referring to fig. 1, in an embodiment of the present application, an electroencephalogram signal acquisition apparatus includes: the brain electrical signal processing device comprises a protective shell 101, a flexible electrode body 102 and a signal processing assembly 103, wherein the flexible electrode body 102 and the signal processing assembly 103 are assembled in the protective shell 101, the flexible electrode body 102 is used for acquiring the brain electrical signal, and the signal processing assembly 103 is used for processing the brain electrical signal acquired by the flexible electrode body 102.

In this embodiment, the flexible electrode body 102 may be made of a conductive flexible material based on conductive silica gel or conductive rubber, and the flexible electrode body 102 may be internally provided with a carbon-based conductive filler or a metal-based conductive filler with good conductivity, where the carbon-based conductive filler may be at least one of carbon black, carbon nanotubes, and graphene, and the metal-based conductive filler may be at least one of silver powder, aluminum silver plating, and nickel powder. Because the flexible electrode body 102 adopts the flexible shell made of conductive silica gel or conductive rubber, and adopts carbon conductive filler or metal conductive filler as internal conductive filler, the flexible electrode has good deformation characteristics, can enhance the close contact between the flexible electrode body 102 and the scalp, reduce the contact impedance with the skin, can ensure the stability and accuracy of the acquired brain electrical signals, and can also ensure the wearing comfort of users.

Fig. 3 shows a schematic structural diagram of a flexible electrode body of the electroencephalogram signal acquisition device of the present application. Referring to fig. 3, in the present embodiment, the flexible electrode body 102 includes a socket 301 and an electrode contact 302, where a first side of the socket 301 is connected to the signal processing component 103, and a second side of the socket 301 is provided with the electrode contact 302, and the electrode contact 302 is used for acquiring an electroencephalogram signal.

The receiving portion 301 of the present embodiment may be in a shape of a cylinder, a cube, a cuboid, or the like having a receiving surface, so that the electrode contact 302 may be disposed on the receiving surface of the receiving portion 301, and stability of the electrode contact 302 in use is ensured.

In this embodiment, the first side and the second side of the receiving portion 301 are opposite sides of the receiving portion 301, that is, the signal processing module 103 and the electrode contact 302 are disposed on opposite sides of the receiving portion 301.

Fig. 2 shows a schematic diagram of the overall effect of the electroencephalogram signal acquisition device of the present application. As shown in fig. 2, in this embodiment, a rounded portion 202 is disposed at one end of the electrode contact 302 away from the receiving portion 301, the protective housing has a lumen 201 sleeved with the electrode contact 302, the length of the electrode contact 302 is greater than that of the lumen 201, and the rounded portion 202 is located outside the lumen when the electroencephalogram signal acquisition device is installed, so that the rounded portion 202 can contact with brain skin to acquire electroencephalogram signals. And the lumen also protects the electrode contact 302 from hair interfering with the electrode contact 302, making the electrode contact 302 easier to contact the skin surface.

In this embodiment, the electrode contact 302 may be an electrode post. The diameter of the electrode contact 302 in the first direction gradually decreases, wherein the first direction is a direction extending toward the round portion 202 with a connection point of the electrode contact 302 and the receiving portion 301 as a starting point. For example, the diameter of the rounded portion 202 of the electrode contact 302 is smaller than the diameter of the junction of the electrode contact 302 and the receptacle 301, and correspondingly, the shape of the lumen matches the shape of the electrode contact 302, thereby facilitating better penetration of the electrode contact 302 through hair and brain skin.

As shown in fig. 3, one end of the electrode contact 302 is connected with the receiving part 301, and one end of the electrode contact 302 away from the receiving part 301 is provided with a rounded part 202, and the rounded part 202 can be provided in an arc shape, so that the electrode contact 302 can better contact with the scalp, and the sensitivity to motion artifacts is reduced.

In this embodiment, the first side of the receiving portion 301 is provided with the first protruding portion 303 and the second protruding portion 304, where the first protruding portion 303 and the second protruding portion 304 may be integrally formed with the receiving portion 301, the first protruding portion 303 and the second protruding portion 304 are used as signal input ends of the signal processing assembly 103, an electroencephalogram signal collected by the electrode contact 302 may be transmitted to the signal processing assembly 103, and the length of the first protruding portion 303 is greater than that of the second protruding portion 304, so that fixation with the signal processing assembly 103 may be achieved through the first protruding portion 303, so that the relative positions of the flexible electrode body 102 and the signal processing assembly 103 remain unchanged, and stability of electroencephalogram signal transmission is increased.

In one example, the first protruding portion 303 is a cylinder, the second protruding portion 304 is a circular truncated cone, a first preset slope is provided at an end of the first protruding portion 303 away from the receiving portion 301, and a second preset slope is provided at a side surface of the second protruding portion 304, so that the installation convenience of the flexible electrode body and the signal processing assembly 103 is increased. The gradients of the first preset slope surface and the second preset slope surface can be set in a self-defined mode according to requirements.

Fig. 4 shows a schematic structural diagram of a signal processing component of the electroencephalogram signal acquisition device of the present application. Fig. 4 (a) is a first schematic surface structure of the signal processing assembly 103, fig. 4 (b) is a second schematic surface structure of the signal processing assembly 103, and the signal processing assembly 103 includes a circuit board 401 and a signal processing circuit disposed on the circuit board 401, where the signal processing circuit is configured to process the electroencephalogram signals collected by the electrode contacts 302.

Referring to fig. 4, a circuit board 401 is provided with a conductive through hole 405 and a pad 402, a first protrusion 303 of a socket 301 passes through the conductive through hole 405, a second protrusion 304 is in contact with the pad 402, and is used for transmitting an electroencephalogram signal collected by an electrode contact 302 to a signal processing circuit, wherein the diameter of the conductive through hole 405 is matched with that of the first protrusion 303, so that the first protrusion 303 can pass through the conductive through hole 405, thereby fixing the circuit board 401 and avoiding displacement of the circuit board 401 and the flexible electrode body 102. In addition, the size of the pad 402 is matched with the second protrusion 304 so that the second protrusion 304 can be in contact with the pad, and the conductive via 405 and the pad 402 are conductors, thereby realizing a signal transmission function.

In this embodiment, the surfaces of the conductive via 405 and the pad 402 are provided with a gold plating layer, which can increase the conductivity of the conductive via 405 and the pad 402 and ensure the transmission quality of the brain electrical signal.

Referring to fig. 4, the signal processing circuit includes an operational amplifier 403 and a connection terminal 404, where the operational amplifier 403 is used for amplifying the received electroencephalogram signal, and the connection terminal 404 is used for outputting the amplified electroencephalogram signal to an electroencephalogram extension device, where the electroencephalogram extension device may be a terminal device such as an electroencephalogram cap or a computer.

Fig. 5 shows a circuit diagram of a signal processing circuit of the electroencephalogram signal acquisition apparatus of the present application. Referring to fig. 5, a positive input terminal of the operational amplifier 403 is connected to the conductive via 405 and the bonding pad 402 through the first resistor R1, that is, an input signal of the positive input terminal of the operational amplifier 403 is an electroencephalogram signal collected by the electrode contact 302, a negative input terminal of the operational amplifier 403 is connected to an output terminal of the operational amplifier 403, an output terminal of the operational amplifier 403 is connected to the connection terminal 404 through the second resistor R2, and the connection terminal 404 is used for connecting to an electroencephalogram expansion device.

The operational amplifier 403 in this embodiment is an active device, a power supply connection end of the operational amplifier 403 is connected to a power supply VCC, and a decoupling capacitor C1 is further connected to the power supply connection end of the operational amplifier 403, for reducing power supply impedance and power supply noise. In addition, since the operational amplifier 403 in the embodiment is an active device, the influence of external interference in the process of acquiring the electroencephalogram signals can be reduced, and the quality of the acquired electroencephalogram signals can be further improved.

In this embodiment, the connection terminal 404 includes a pin 1, a pin 2 and a pin 3, wherein the pin 1 is connected to the positive electrode of the power supply, the pin 2 is used for inputting the brain electrical signal amplified by the operational amplifier, and the pin 3 is grounded.

In one example, the protective housing may be a closed shell or may be assembled from two parts. In the case where the protective case is assembled from two parts, referring to fig. 1, the protective case includes a first protective case 1011 and a second protective case 1012 which are detachably installed, and the first protective case 1011 and the second protective case 1012 may be connected by screw connection or may be connected by a connection structure such as a buckle. The protective shell can be formed by injection molding of medical plastic.

Fig. 6 shows a schematic structural diagram of a first protective case of the electroencephalogram signal acquisition apparatus of the present application. Referring to fig. 6, the cavity 201 is located in a first protective case 1011, the first protective case 1011 further includes a main cavity 601, the main cavity 601 being for accommodating the socket 301 and the signal processing assembly 103, the main cavity 601 being integrally formed with the cavity 201. Because the first protecting shell 1011 and the second protecting shell 1012 can be formed by injection molding of medical plastic, the electrode has certain rigidity, and can fix the connecting part of the bearing part 301 and the electrode contact 302, thereby increasing the durability of the electrode flexible body.

In this embodiment, the diameter of the end of the main lumen 601 near the lumen 201 is smaller than the diameter of the end of the main lumen 601 remote from the lumen 201. Thereby facilitating assembly of the flexible electrode body 102 and the signal processing assembly 103. The first protective case 1011 and the second protective case 1012 are assembled by a screw structure in this embodiment.

Fig. 7 shows a schematic structural diagram of a second protective case of the electroencephalogram signal acquisition apparatus of the present application. In this embodiment, the first side of the second protective housing 1012 is provided with a third protruding portion 702, and the third protruding portion 702 is used for fixing the signal processing component 103. The mounting position of the third protruding portion 702 corresponds to the position of the metal through hole 405 on the circuit board 401, so as to achieve the purpose of fixing the second protective case 1012 to the circuit board 401.

In this embodiment, the first protruding portion 303, the second protruding portion 304, the metal through hole 405, the bonding pad 402, and the third protruding portion 702 include a plurality of groups, and when the electroencephalogram signal acquisition apparatus is mounted, a plurality of groups of first protruding portion 303, metal through hole 405, and third protruding portion 702, and a plurality of groups of second protruding portion 304 and bonding pad 402, which are in one-to-one correspondence, are formed.

Referring to fig. 7, the second protective housing 1012 is provided with a wire outlet 701, and the wire outlet 701 is used for leading out a wire connected to the signal processing component 103, so that the electroencephalogram signal acquisition device and the electroencephalogram expansion device can perform signal transmission.

The side wall of the wire outlet hole 701 is provided with a screwing part 704, and the screwing part 704 is used for connecting electroencephalogram extension equipment, so that the overall structure of the electroencephalogram acquisition device is convenient to assemble with the electroencephalogram extension equipment such as an electroencephalogram cap, and the application range of the electroencephalogram acquisition device of the embodiment is improved.

Wherein, the second side of second protective housing 1012 still is provided with assembly auxiliary member 703, and assembly auxiliary member 703 can be cross strengthening rib, straight strengthening rib etc. to make things convenient for the operating personnel to carry out the assembly of first protective housing 1011 and second protective housing 1012.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the present application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the application, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the application and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed application requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.

Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component and, furthermore, they may be divided into a plurality of sub-modules or sub-units or sub-components. Any combination of all features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be used in combination, except insofar as at least some of such features and/or processes or units are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the present application and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of various changes or substitutions within the technical scope of the present application, and these should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An electroencephalogram signal acquisition device, characterized by comprising: a protective housing, and a flexible electrode body and a signal processing assembly assembled within the protective housing;

the flexible electrode body comprises a bearing part and an electrode contact, a first side of the bearing part is connected with the signal processing assembly, a second side of the bearing part is provided with the electrode contact, and the first side and the second side are opposite sides;

the electrode contact is far away from the one end of adapting portion is provided with the rounding off, the protective housing have with electrode contact looks overlapping cavity pipe, electrode contact's length is greater than the length of cavity pipe, the rounding off is located outside the cavity pipe, the rounding off is used for gathering the brain electrical signal, the signal processing subassembly is used for handling the brain electrical signal.

2. The electroencephalogram signal acquisition device according to claim 1, wherein the signal processing component comprises a circuit board and a signal processing circuit provided on the circuit board;

the circuit board is provided with conductive through holes and bonding pads, the first side of the bearing part is provided with a first protruding part and a second protruding part, the first protruding part penetrates through the conductive through holes, the second protruding part is in contact with the bonding pads and is used for transmitting brain electrical signals collected by the electrode contacts to the signal processing circuit, and the first protruding part is used for fixing the circuit board.

3. The electroencephalogram signal acquisition apparatus according to claim 2, wherein the signal processing circuit includes an operational amplifier and a connection terminal;

the positive electrode input end of the operational amplifier is connected with the conductive through hole and the bonding pad through a first resistor, the negative electrode input end of the operational amplifier is connected with the output end of the operational amplifier, the output end of the operational amplifier is connected with the connecting terminal through a second resistor, and the connecting terminal is used for being connected with an electroencephalogram expansion device.

4. The electroencephalogram signal acquisition apparatus according to claim 2, wherein,

the first protruding part is a cylinder, the second protruding part is a round table, and a first preset slope is arranged at one end of the first protruding part far away from the bearing part;

the side face of the second protruding portion is provided with a second preset slope.

5. An electroencephalogram signal acquisition apparatus according to claim 2 or 3, characterized in that,

and the surfaces of the conductive through holes and the bonding pads are provided with gold deposition layers.

6. The electroencephalogram signal acquisition device according to claim 1, wherein the protective case includes a first protective case and a second protective case which are detachably installed;

the cavity tube is positioned in the first protective shell, the first protective shell further comprises a main cavity body, the main cavity body is used for accommodating the bearing part and the signal processing component, and the main cavity body and the cavity tube are integrally formed;

the first side of the second protective housing is provided with a third protruding portion, and the third protruding portion is used for fixing the signal processing component.

7. The electroencephalogram signal acquisition apparatus according to claim 6, wherein a diameter of an end of the main cavity close to the lumen is smaller than a diameter of an end of the main cavity away from the lumen.

8. The electroencephalogram signal acquisition apparatus according to claim 6, wherein,

the second protective shell is provided with a wire outlet hole, and the wire outlet hole is used for leading out a wire connected with the signal processing assembly;

the side wall of the wire outlet hole is provided with a screwing part, and the screwing part is used for connecting electroencephalogram expansion equipment.

9. The electroencephalogram signal acquisition apparatus according to claim 8, wherein,

the second side of the second protective housing is provided with an assembly aid.

10. The electroencephalogram signal acquisition apparatus according to claim 1, wherein the diameter of the electrode contact in a first direction is gradually reduced, wherein the first direction is a direction extending toward the rounded portion with a connection point of the electrode contact and the receiving portion as a starting point.