A wearable electroencephalogram sensor

Abstract

The utility model belongs to the field of electroencephalogram (EEG) sensors, and relates to a wearable EEG sensor, including a headband having an inner cavity; a first conductive unit located in the inner cavity; a second conductive unit located in the inner cavity and slidably connected with the first conductive unit, and when the first conductive unit and the second conductive unit slide relative to each other, the wearing size of the headband is adjusted accordingly; a detection unit having a suction cup structure, the main body of the suction cup structure is connected to the inner cavity, and the suction cup surface of the suction cup structure is an EEG detection surface; the EEG detection surface is connected to the first conductive unit or the second conductive unit through an elastic conductive thread. The EEG sensor of the present application can be worn on the body and can have sufficient contact with the detection site.

Description

Technical Field

[0001] The utility model belongs to the field of electroencephalogram sensors and relates to a wearable electroencephalogram sensor. Background Art

[0002] EEG signals can output EEG and analyze EEG data based on it; they can also realize the action and control of external devices based on EEG signals. Existing technical applications include: EEG equipment output controls Avatar activities as shown in the Avatar movie, and Xiaomi's MiGu controls smart home appliances through EEG signals.

[0003] The application of EEG signal detection will become more and more extensive, but how to make it both wearable and able to accurately detect EEG signals is the development direction of EEG sensors.

[0004] When designing an EEG sensor, it is necessary to consider the full contact between the EEG sensor and the detection site. In order to ensure that the EEG electrode can fully detect brain waves, the existing technology usually uses a semi-dry electrode, that is, under pressure, the electrolyte in the electrode cavity is released to the scalp surface in trace amounts to establish a relatively stable electrical-scalp interface. In specific implementation, external force is used to assist in wearing the EEG electrode, and conductive glue is applied between the EEG electrode and the scalp. However, in actual application, the operation has a certain degree of complexity and is highly dependent on the operator's skills; at the same time, it is also not aesthetically pleasing. Utility Model Content

[0005] The present application provides a wearable electroencephalogram sensor that can be worn on the body and can have sufficient contact with a detection site.

[0006] In order to achieve the above technical objectives, the present application adopts a wearable EEG sensor, including:

[0007] a headband having an inner cavity;

[0008] A first conductive unit, located in the inner cavity;

[0009] A second conductive unit is located in the inner cavity and is slidably connected to the first conductive unit, and when the first conductive unit and the second conductive unit slide relative to each other, the wearing size of the headband is adjusted accordingly;

[0010] The detection unit has a suction cup structure, the main body of the suction cup structure is connected to the inner cavity, and the suction cup surface of the suction cup structure is an EEG detection surface; the EEG detection surface is connected to the first conductive unit or the second conductive unit through an elastic conductive thread;

[0011] The first conductive unit has a first end and a second end; the second conductive unit has a third end and a fourth end; the third end slides between the first end and the second end; and the second end slides between the third end and the fourth end.

[0012] As an improved technical solution of the present application, the headband is made of silicone material. When it is made of silicone material, the headband is a ring structure.

[0013] As an improved technical solution of the present application, the headband is made of a hard material and is a ring-shaped structure with an opening; the hard material is a metal material or a plastic material.

[0014] As an improved technical solution of the present application, the first conductive unit or the second conductive unit is a conductive metal wire or a conductive metal sheet.

[0015] As an improved technical solution of the present application, the inner cavity is filled with conductive paste.

[0016] As an improved technical solution of the present application, a penetration hole is provided on the EEG detection surface.

[0017] As an improved technical solution of the present application, the EEG detection surface is a conductive metal sheet.

[0018] As an improved technical solution of the present application, the end of the headband is also provided with an EEG signal amplifier.

[0019] As an improved technical solution of the present application, the end of the elastic conductive thread has a conductive metal sleeve, and the conductive metal sleeve is installed on the first conductive unit or the second conductive unit.

[0020] Beneficial Effects

[0021] The present application designs the brain electrodes in the form of a headband, which combines the aesthetics and practical performance of a wearable device; in specific applications, the headband can provide a certain amount of pressure on the EEG detection surface, causing the EEG detection surface to fully adhere to the detection site (scalp).

[0022] The electrical signal detection and sensing of the present application is mainly through the EEG detection surface, the first conductive unit and the second conductive unit, and all three rely on the headband to form a connected whole. The material selection of the headband can ensure that the EEG signal is always in a closed environment, can avoid external signal interference, and facilitate the use of EEG wearable devices in various places.

[0023] This application adopts a suction cup structure, which mainly plays the role of stabilizing the EEG detection surface. Specifically, the main structure of the suction cup structure is flexible (the suction cup main body is mainly made of silicone material). When in use, the EEG detection surface squeezes the elastic conductive wire, and the main body of the suction cup structure will be deformed accordingly, so that the EEG detection surface can fully contact with the scalp.

[0024] The first conductive unit and the second conductive unit adopt a relative sliding mode, which can achieve the size adjustment of the first conductive unit and the second elastic unit together with the headband for different detection objects. It also achieves that the detection of EEG signals and the transmission to the EEG signal amplifier are both wired connections, with basically no signal loss.

[0025] The inner cavity is filled with conductive glue, and a penetration hole is provided on the EEG detection surface. During use, due to the pressure of the headband, the headband and the suction cup structure are squeezed, and the conductive glue penetrates out of the penetration hole under the action of the pressure, so that the EEG detection surface and the detection site have sufficient contact; at the same time, the conductive glue filled in the inner cavity can improve the conductivity between the elastic conductive wire and the first conductive unit and the second conductive unit; from the signal detection dimension, the actual EEG signal obtained comes from the signal detected by the conductive glue and the EEG signal detected by the EEG detection surface, further improving the accuracy of EEG signal detection.

[0026] In summary, the wearable EEG sensor of the present application not only has the function of preventing external signal interference, but also has highly accurate EEG signal detection, and can also be designed with high aesthetic performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Draw a schematic diagram of the overall structure of the EEG sensor of this application;

[0028] Figure 2 Draw a front view of the brain electrode sensor of this application;

[0029] Figure 3 A rear view of the brain electrode sensor of the present application is shown;

[0030] Figure 4 A schematic diagram showing the connection relationship of the conductive units in the brain electrode sensor of the present application is drawn;

[0031] Figure 5 Draw a schematic diagram of the suction cup structure of this application;

[0032] Figure 6 Draw a schematic diagram of the suction cup surface structure of the present application;

[0033] In the figure, 1, headband; 2, suction cup surface; 3, second conductive unit; 4, third terminal; 5, first conductive unit; 6, second terminal; 7, metal sleeve; 8, penetration hole; 9, elastic conductive wire. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with general skills in the field to which the utility model belongs.

[0035] The words "first", "second" and similar terms used in the specification and claims of this utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components.

[0036] Technical principle: The present application combines the detection unit structure with the headband 1. The headband 1 has both aesthetic effects and a restraining effect on the detection unit. It also integrates the detection unit, the first conductive unit 5 and the second conductive unit 3 into an integrated structure and provides electromagnetic shielding for the detection unit, the first conductive unit 5 and the second conductive unit 3. The detection unit detects EEG signals, and the first conductive unit 5 and the second conductive unit 3 conduct EEG signals.

[0037] The technical solution of the present application is described in detail below with reference to the accompanying drawings.

[0038] Example 1

[0039] like Figure 1-6 As shown, a wearable electroencephalogram sensor includes

[0040] The headband 1 has an inner cavity. In actual application, the headband 1 can be made of silicone material. In this case, the headband 1 is a closed ring structure, and the elasticity of the headband 1 is used to wear the headband. The headband 1 can also be made of a plastic material or a metal material (hard material) with a certain elasticity. In this case, the headband 1 is a ring structure with a certain opening, and the elasticity provided by the open ring structure is used to wear the headband. When a metal material is used, in order to avoid electromagnetic interference, the inside of the metal material has an electrical insulation coating or the metal material is an insulating metal material. At this time, an opening is provided on the headband 1, and the opening is connected to an external device for processing EEG signals.

[0041] The first conductive unit 5 is located in the inner cavity; the second conductive unit 3 is located in the inner cavity; the second conductive unit 3 is slidably connected with the first conductive unit 5, and the wearing size of the headband 1 is adjusted accordingly when the first conductive unit 5 and the second conductive unit 3 slide relative to each other. In practical application, the first conductive unit 5 has a first end and a second end 6; the second conductive unit 3 has a third end 4 and a fourth end; the third end 4 slides between the first end and the second end 6; the second end 6 slides between the third end 4 and the fourth end, and at this time, the first conductive unit 5 and the second conductive unit 3 are conductive metal wires or conductive metal sheets. The first end, the second end 6, the third end 4 and the fourth end can all realize the position restriction of the first conductive unit 5 and the second conductive unit 3, and at the same time, they can also increase the electrical signal conduction between the first conductive unit 5 and the second conductive unit 3. The ends (the first end, the second end 6, the third end 4 and the fourth end) can all be annular structures to facilitate sliding and conduction, and the inner diameter of the annular structure can be the sum of the diameters of the first conductive unit 5 and the second conductive unit 3.

[0042] like Figure 4 and Figure 5 As shown, the detection unit has a suction cup structure (having a main body and a suction cup surface 2). The main body of the suction cup structure is connected to the inner cavity, and the suction cup surface 2 of the suction cup structure is an EEG detection surface; the EEG detection surface is connected to the first conductive unit 5 or the second conductive unit 3 through an elastic conductive wire 9. The contact between the elastic conductive wire 9 and the EEG detection surface can be a point contact between the end of the elastic conductive wire 9 and the EEG detection surface directly, or the elastic conductive wire 9 can be linearly contacted with the EEG detection surface in a coil spring structure.

[0043] In actual application, the main body of the suction cup structure is mainly made of silicone material. At the same time, since it needs to be connected to the inner cavity, the main body of the suction cup structure has a channel or a receiving cavity; the elastic conductive wire 9 can be connected to the first conductive unit 5 or the second conductive unit 3 through the channel or the receiving cavity.

[0044] In order to ensure that the detection unit can fully detect the EEG signal, the EEG detection surface is a conductive metal sheet. The conductive metal sheet preferably selects a metal sheet with a thickness of no more than 1 mm to ensure that the EEG detection mask has a certain flexibility. The conductive metal sheet can be selected from Ag, Cu, Au, Al, Fe, Pt, Ni, Co, Bi, Sn, Sn-Ag, Sn-Cu, Sn-Ag-Cu, Sn-Ag-Bi, Sn-Zn-Bi, and / or Sn-Bi materials with conductive properties.

[0045] Preferably, the end of the elastic conductive wire 9 has a conductive metal sleeve 7, and the conductive metal sleeve 7 is installed on the first conductive unit 5 or the second conductive unit 3. The conductive metal sleeve 7 is used to stabilize the suction cup structure and to increase the conductivity between the suction cup structure and the first conductive unit 5 and the second conductive unit 3.

[0046] Example 2

[0047] like Figure 6 As shown, the difference from the embodiment is that the inner cavity is filled with conductive paste, and the EEG detection surface is provided with a penetration hole 8. At this time, the headband 1 is provided with two openings, one opening is connected to the external device for EEG signal processing; the other opening is used to replenish the conductive paste.

[0048] The conductive paste is a conductive glue with conductive properties in the prior art. The conductive paste is filled in the inner cavity to increase the connection performance between the first conductive unit 5, the second conductive unit 3 and the conductive metal wire. The conductive paste seeps through the penetration hole 8 to achieve the detection of EEG signals together with the EEG detection surface, which can increase the accuracy of EEG signal detection to a certain extent.

[0049] The inner cavity is filled with conductive glue, and a penetration hole 8 is provided on the EEG detection surface. During use, due to the pressure of the headband 1, the headband 1 and the suction cup structure are squeezed, and the conductive glue penetrates through the penetration hole 8 under the action of the pressure, so that the EEG detection surface and the detection site have sufficient contact; at the same time, the conductive glue filled in the inner cavity can improve the conductivity between the elastic conductive wire 9 and the first conductive unit 5 and the second conductive unit 3; from the signal detection dimension, the actual EEG signal obtained comes from the signal detected by the conductive glue and the EEG signal detected by the EEG detection surface, which further improves the accuracy of EEG signal detection.

[0050] Example 3

[0051] Different from the embodiment 1 or the embodiment 2, the end of the headband 1 is also provided with an electroencephalogram signal amplifier, so that both signal detection and signal amplification are directly physically connected, which can effectively avoid the loss of electrical signals.

[0052] More preferably, an EEG signal transmitter can also be integrated into the headband 1, and the EEG signal transmitter receives the signal output end of the EEG signal amplifier. After integration, the EEG sensor can be used remotely. At this time, the headband 1 is provided with an interface with the outside at the location where the EEG signal amplifier is provided.

[0053] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A wearable electroencephalogram sensor, characterized in that: include a headband having an inner cavity; A first conductive unit, located in the inner cavity; A second conductive unit is located in the inner cavity and is slidably connected to the first conductive unit, and when the first conductive unit and the second conductive unit slide relative to each other, the wearing size of the headband is adjusted accordingly; The detection unit has a suction cup structure, the main body of the suction cup structure is connected to the inner cavity, and the suction cup surface of the suction cup structure is an EEG detection surface; the EEG detection surface is connected to the first conductive unit or the second conductive unit through an elastic conductive thread; The first conductive unit has a first end and a second end; the second conductive unit has a third end and a fourth end; the third end slides between the first end and the second end; and the second end slides between the third end and the fourth end.

2. A wearable EEG sensor according to claim 1, characterized in that: The headband is made of silicone material. When it is made of silicone material, the headband is a ring structure.

3. A wearable EEG sensor according to claim 1, characterized in that: The headband is made of a hard material and is an annular structure with an opening; the hard material is a metal material or a plastic material.

4. A wearable EEG sensor according to claim 1, characterized in that: The first conductive unit or the second conductive unit is a conductive metal wire or a conductive metal sheet.

5. A wearable EEG sensor according to claim 1, characterized in that: The inner cavity is filled with conductive paste.

6. A wearable EEG sensor according to claim 1, characterized in that: The electroencephalogram detection surface is provided with a penetration hole.

7. A wearable EEG sensor according to claim 1, characterized in that: The electroencephalogram detection surface is made of a conductive metal sheet.

8. A wearable EEG sensor according to claim 1, characterized in that: The end of the headband is also provided with an electroencephalogram signal amplifier.

9. A wearable EEG sensor according to claim 1, characterized in that: The end of the elastic conductive thread has a conductive metal sleeve, and the conductive metal sleeve is installed on the first conductive unit or the second conductive unit.

Images