Electroencephalogram acquisition device
Through the combined design of the conductive knitted layer and the sponge support, the problems of unstable electrode impedance and uncomfortable wearing in traditional EEG acquisition devices are solved, and the effect of stable contact and efficient acquisition of EEG signals is achieved.
Patent Information
- Application Number
- CN202421720918.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-07-19
AI Technical Summary
The existing EEG acquisition devices have problems of unstable electrode impedance and uncomfortable wearing, especially traditional wet electrodes have a larger impedance due to moisture volatility, and rigid dry electrodes cannot adapt to changes in head curvature and have poor comfort.
The combination design of the conductive knitted layer and the sponge support part is adopted. The conductive knitted layer wraps the sponge support part and is connected to the fixed steel sheet. The sponge support layer is sandwiched between the first and second sponge layers to form a flexible contact, adapting to the shape of the human head, and the fixed steel sheet is connected to the shell to ensure a stable contact area.
The stability of the electrode impedance and wear comfort are achieved, the accuracy and comfort of electroencephalogram signals are improved, the impedance problem caused by moisture evaporation is avoided, and the irregular shape of the head is adapted.
Smart Images
Figure CN223220453U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of intelligent wearable devices, and in particular to an electroencephalogram (EEG) acquisition device. Background Art
[0002] With the continuous advancement of research in medicine, neuroscience, cognitive psychology, and artificial intelligence, EEG signals are increasingly being applied in medical testing, clinical diagnosis, and the emerging field of brain-computer interfaces. As a direct external representation of the central nervous system, EEG signals can reflect the activity status of different regions of the cerebral cortex and can be used to monitor a person's physiological and psychological state, as well as the interaction between brain regions involved in different brain functions. They can also provide diagnostic information for brain conditions such as fatigue, stroke, and brain death. Combined with EEG interpretation technology, they can enable direct communication between the brain and external devices, realizing brain-computer interface systems.
[0003] At present, EEG signals are weak voltage signals. In order to obtain high-quality EEG signals, the electrodes need to have low impedance and noise, and relatively stable electrode impedance. This also requires the wearable device to be comfortable. Traditional wearable devices with wet electrodes are cumbersome to wear, and as the water in the conductive medium evaporates, its impedance will increase, resulting in unstable electrode impedance, which is not conducive to the collection of EEG signals. Although traditional devices with rigid dry electrodes are convenient to wear, they cannot adapt to changes in the curvature of the human head, resulting in a decrease in their effective contact area and an increase in impedance. In addition, due to the rigidity of the electrodes, the pressure of the electrodes on the head becomes uneven, resulting in poor comfort. Wearing for a long time may even affect the wearer's movements and behavior, which is not conducive to the collection of EEG signals. Utility Model Content
[0004] The utility model provides an electroencephalogram (EEG) acquisition device that is easy and comfortable to wear, has stable electrode impedance, and accurately acquires information. It includes: a housing and EEG electrodes;
[0005] The brain wave electrode comprises a conductive knitted layer, a sponge support part, a fixed steel sheet and a circuit board, wherein the conductive knitted layer wraps the sponge support part and is connected to the fixed steel sheet;
[0006] The fixing steel sheet is connected to the shell.
[0007] Furthermore, the conductive knitted layer includes a first conductive layer and a second conductive layer, the sponge support portion is sandwiched between the first conductive layer and the second conductive layer, and the first conductive layer and the second conductive layer are press-fitted and connected along the outer edge of the sponge support portion;
[0008] The second conductive layer is bonded to the fixed steel sheet;
[0009] The fixing steel sheet is connected to the circuit board.
[0010] Furthermore, the sponge support portion includes: a first sponge layer, a sponge support layer and a second sponge support layer;
[0011] The sponge support layer is sandwiched between the first sponge layer and the second sponge layer. The first sponge layer and the second sponge layer are pressed and connected with the first conductive layer and the second conductive layer along the outer edge of the sponge support layer.
[0012] Furthermore, the shell is annular, and a limiting hole is provided on the inner side of the shell, and the limiting hole is adapted to the shape of the conductive knitted layer;
[0013] The width of the fixing steel sheet is greater than the width of the limiting hole, and the fixing steel sheet is fixedly connected to the inner side of the shell.
[0014] Furthermore, the top of the sponge support layer has a bulge.
[0015] Beneficial effects:
[0016] Compared to existing technologies, this new device uses a conductive knitted layer to collect the user's brainwaves, eliminating the need for a water-containing dielectric medium. This effectively avoids the increased impedance caused by water evaporation, resulting in less noise in the collected brainwaves. Furthermore, the conductive knitted layer is flexible, which, combined with the sponge support, provides greater comfort. Furthermore, the elasticity of the sponge support allows the device to adapt to the irregular shape of the human head, ensuring effective contact between the conductive knitted layer and the skin, resulting in more accurate data collection.
[0017] Attached drawings:
[0018] The drawings in the specification described herein are used to further illustrate the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:
[0019] Figure 1 This is a schematic diagram of the overall structure of the EEG acquisition device according to an embodiment of the present utility model.
[0020] Figure 2 Schematic diagram of the overall structure of the dry electrode in the embodiment of the present utility model.
[0021] 1. Brain wave electrode; 11. Conductive knitted layer; 111. First conductive layer; 112. Second conductive layer; 12. Sponge support part; 121. First sponge layer; 122. Sponge support layer; 123. Second sponge layer; 13. Fixed steel sheet; 14. Circuit board; 2. Housing; 21. Limiting hole. DETAILED DESCRIPTION
[0022] To make the above-mentioned purposes, features, and advantages of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.
[0023] like Figure 1 and Figure 2 As shown, an embodiment of the utility model provides an electroencephalogram (EEG) acquisition device, a shell 2 and an electroencephalogram (EBG) electrode 1, wherein the electroencephalogram (EBG) electrode 1 has a conductive knitted layer 11, a sponge support portion 12, a fixed steel sheet 13 and a circuit board 14, the conductive knitted layer 11 wraps the sponge support portion 12 and is connected to the fixed steel sheet 13, and the fixed steel sheet 13 is connected to the shell 2.
[0024] Compared to existing technologies, the present invention uses a conductive knitted layer 11 to collect the user's brainwaves, eliminating the need for a water-containing dielectric medium. This effectively avoids the increased impedance caused by water evaporation, resulting in less noise in the collected brainwaves. Furthermore, the conductive knitted layer 11 is flexible, and when combined with the sponge support portion 12, it provides greater comfort when worn. Furthermore, the elasticity of the sponge support portion 12 allows the present invention to adapt to the irregular shape of the human head, ensuring effective contact area between the conductive knitted layer 11 and the skin, resulting in more accurate data collection.
[0025] like Figure 2 As shown, the conductive knitted layer 11 includes a first conductive layer 111 and a second conductive layer 112, and the sponge support part 12 is sandwiched between the first conductive layer 111 and the second conductive layer 112. Specifically, the first conductive layer 111 covers the top and the peripheral side of the sponge support part 12 to ensure the effective skin-friendly area of the conductive knitted layer 11. The second conductive layer 112 covers the bottom surface of the sponge support part 12 and fits with the fixed steel sheet 13 to ensure the effective contact area for electrical signal conduction. Finally, the first conductive layer 111 and the second conductive layer 112 are pressed and connected along the outer edge of the sponge support part 12, and form a boss structure with the fixed steel sheet 13. At the same time, as shown in FIG. Figure 1 As shown, the shell 2 is annular, and a limiting hole 21 is opened on its inner side. The limiting hole 21 is adapted to the shape of the conductive knitted layer 11, and the width of the fixed steel sheet 12 is greater than the width of the limiting hole 21. Therefore, the brain wave electrode 1 can be embedded in the shell 2 through the limiting hole 21, and then the fixed steel sheet 13 is fixedly connected to the inner side of the shell 2 for further reinforcement.
[0026] In addition, in actual use, due to the elasticity of the sponge, when the sponge support part 12 is compressed, it is easy to move in the conductive knitted layer 11, forming a cavity, causing the first conductive layer 111 to wrinkle. Over time, the conductive knitted layer 111 is prone to irreversible deformation, making it impossible to accurately collect the user's brain waves. To avoid this phenomenon and extend the service life, Figure 2 As shown, the sponge support portion 12 of this embodiment of the utility model includes: a first sponge layer 121, a sponge support layer 122, and a second sponge support layer 123. The sponge support layer 122 is sandwiched between the first sponge layer 121 and the second sponge layer 123. The first sponge layer 121 and the second sponge layer 123 are pressed together and connected to the first conductive layer 111 and the second conductive layer 112 along the outer edges of the sponge support layers, thereby limiting the relative movement between the sponge support portion 12 and the conductive knitted layer 11. At the same time, to better fit the user's skin, the sponge support layer 122 of this embodiment has a raised top and is preferably 1-1.5 cm thick.
[0027] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.
Claims
1. An electroencephalogram (EEG) acquisition device, characterized in that: include: Shell and brainwave electrodes; The brain wave electrode comprises a conductive knitted layer, a sponge support part, a fixed steel sheet and a circuit board, wherein the conductive knitted layer wraps the sponge support part and is connected to the fixed steel sheet; The fixing steel sheet is connected to the shell.
2. The EEG acquisition device according to claim 1, characterized in that: The conductive knitted layer includes a first conductive layer and a second conductive layer, the sponge support portion is sandwiched between the first conductive layer and the second conductive layer, and the first conductive layer and the second conductive layer are press-fitted and connected along the outer edge of the sponge support portion; The second conductive layer is bonded to the fixed steel sheet; The fixing steel sheet is connected to the circuit board.
3. The EEG acquisition device according to claim 2, characterized in that: The sponge support part includes: a first sponge layer, a sponge support layer and a second sponge support layer; The sponge support layer is sandwiched between the first sponge layer and the second sponge layer. The first sponge layer and the second sponge layer are pressed and connected with the first conductive layer and the second conductive layer along the outer edge of the sponge support layer.
4. The EEG acquisition device according to claim 1, characterized in that: The shell is annular, and a limiting hole is provided on the inner side of the shell, and the limiting hole is adapted to the shape of the conductive knitted layer; The width of the fixing steel sheet is greater than the width of the limiting hole, and the fixing steel sheet is fixedly connected to the inner side of the shell.
5. The EEG acquisition device according to claim 1, characterized in that: The top of the sponge supporting part is provided with a bulge.