Matrix type contact electrode device for skull surface

Abstract

The invention discloses a skull surface matrix type contact electrode device, and relates to the technical field of medical equipment, and the skull surface matrix type contact electrode device is characterized by comprising a brain-computer interface device, a plurality of electrode plates and wires; the brain-computer interface device is provided with an electroencephalogram data interface used for being connected with external computer equipment. The brain-computer interface is also provided with a circuit board, a wireless transmission module, a control module, a signal processing module, a rechargeable power supply and a plurality of signal interfaces; one end of the wire is connected with the electrode interface, and the other end of the wire is connected with the signal interface. The device has the advantages of being capable of achieving matrix type collection, high in attachment degree with the skull surface and easy and convenient to operate, high-density signal collection of a large area of the skull surface is achieved, the spatial resolution of signal collection is improved, and the high-precision monitoring requirement is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical equipment, more particularly, it relates to a skull surface matrix contact electrode device. BACKGROUND

[0002] In the field of biomedical engineering, the collection of electroencephalogram signals is an important means for studying brain function, diagnosing brain diseases, and realizing neural regulation. At present, the commonly used electroencephalogram collection electrodes mainly include scalp electrodes and intracranial electrodes. Although the scalp electrode is simple to operate and non-invasive, due to the existence of the scalp layer, subcutaneous tissue and the like, the signal attenuation is large, the signal-to-noise ratio of the collected electroencephalogram signals is low, and it is difficult to meet the demand of high-precision monitoring; the intracranial electrode can collect high-quality electroencephalogram signals, but it is a invasive operation, and there are risks of infection and bleeding, and the scope of application is limited, and it is usually used only in specific clinical research or surgery.

[0003] In order to improve the quality of electroencephalogram signal collection under the premise of non-invasive or minimally invasive, the relevant technical personnel proposed the concept of skull surface electrode. However, the existing scalp electrode and intracranial electrode cannot realize the comprehensive and matrix collection of electroencephalogram signals on a large area of the skull surface, resulting in low spatial resolution of signal collection. At the same time, the existing skull surface electrode has poor adhesion to the skull surface, and is easily affected by head movement, further affecting the accuracy and stability of electroencephalogram signal collection.

[0004] Therefore, it has become a technical problem to be solved in the field to develop a skull surface matrix contact electrode which can realize matrix collection, has high adhesion to the skull surface, and is simple to operate. SUMMARY

[0005] The purpose of the present application is to provide a skull surface matrix contact electrode device which can realize matrix collection and is simple to operate.

[0006] The above technical purpose of the present application is realized by the following technical scheme: a skull surface matrix contact electrode device, comprising a brain-computer interface device, a plurality of electrode pieces and a lead wire; the brain-computer interface device is provided with a electroencephalogram data interface for connecting an external computer device; the brain-computer interface is further provided with a circuit board, a wireless transmission module, a control module, a signal processing module, a rechargeable power supply and a plurality of signal interfaces; the electrode piece is provided with an electrode interface, one end of the lead wire is connected with the electrode interface, and the other end is connected with the signal interface.

[0007] The present application is further provided: the electrode piece comprises a flexible substrate and a plurality of electrode contacts arranged in a matrix at the bottom of the flexible substrate, one side of the flexible substrate is provided with an electrode interface; the inside of the flexible substrate is provided with a connecting line for connecting the electrode contacts and the electrode interface.

[0008] The electrode contact includes an insulating base, an insulating partition is arranged in the middle of the bottom of the insulating base, and an electric stimulation area and a signal feedback receiving area are oppositely arranged on both sides of the insulating partition, and the electric stimulation area and the signal feedback receiving area are respectively provided with a stimulation electrode and a signal electrode in the flexible substrate, and a stimulation electrode end and a signal electrode end are arranged in the electrode interface, and the stimulation electrode and the signal electrode are connected with the stimulation electrode end and the signal electrode end through connecting wires.

[0009] The stimulation electrode end and the signal electrode end are integrated into an interface end at the electrode interface, and are connected with the signal interface through wires.

[0010] The signal interface includes a plurality of stimulation electrode interfaces and signal electrode interfaces, and the stimulation electrode end and the signal electrode end are connected with the stimulation electrode interfaces and the signal electrode interfaces through wires.

[0011] The flexible substrate is made of one of medical silicone rubber and polyimide film, and has a thickness of 0.5-3.0 mm.

[0012] The distance between adjacent electrode contacts of the electrode sheet is 0.5-2.0 mm.

[0013] The control module can accurately control the independent work of each electrode sheet, and the signal processing module can process the feedback signals collected by the electrode sheet electric stimulation.

[0014] The wireless transmission module is a Bluetooth module, and the wireless control instructions and the processed feedback signals are transmitted through the Bluetooth module.

[0015] The rechargeable power supply is a rechargeable lithium battery, and is charged in a wireless charging mode.

[0016] In summary, the present application has the following advantages: 1. Compared with the scalp electrode, the present application directly acts on the surface of the skull through the electrode sheet, reduces the attenuation of the signal by the scalp layer and subcutaneous tissue, and greatly improves the signal-to-noise ratio of the electroencephalogram signal in combination with the signal processing module; compared with the intracranial electrode, the present application does not need invasive operation, avoids the risk of infection and bleeding, and has a wider application range, and can be used for conventional brain function research, disease diagnosis and neural regulation.

[0017] 2. The flexible substrate of the electrode sheet ensures high adhesion to the surface of the skull, and the matrix distributed electrode contacts (with a distance of 0.5-2.0 mm) realize high-density signal collection on a larger area of the surface of the skull, improve the spatial resolution of signal collection, and meet the demand of high-precision monitoring.

[0018] 3. The electrode contact integrates electrical stimulation and signal feedback receiving functions, realizing "stimulation-monitoring" integration; the control module supports independent work of each electrode sheet, the wireless transmission module realizes wireless control and data transmission, and the device parameters can be flexibly adjusted according to actual needs, and the device is suitable for use requirements of different brain regions and different scenes.

[0019] 4. The integrated interface design, wireless charging method, medical material selection (flexible substrate) and the like reduce the operation complexity of the device, improve the use convenience and wearing comfort, and at the same time, guarantee the biological safety and the service life of the equipment, and have high clinical and scientific research application value. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of an electrode sheet in the embodiment of the application;

[0021] Figure 2 is a schematic diagram of the bottom of an electrode sheet in the embodiment of the application;

[0022] Figure 3 is a matrix type contact electrode device in the embodiment of the application;

[0023] Figure 4 is a schematic diagram of an electrode sheet in the second embodiment of the application.

[0024] In the figure: 1, flexible substrate; 2, electrode interface; 3, electrode contact; 31, electrical stimulation area; 32, signal feedback receiving area; 33, insulation layer; 4, lead wire; 5, brain-computer interface device; 6, electroencephalogram data interface. DETAILED DESCRIPTION

[0025] The following will be described in detail in combination with the accompanying Figures 1-4 The application will be further described in detail.

[0026] Embodiment: A skull surface matrix type contact electrode device, as shown in Figure 1 , Figure 2 , Figure 3 , comprises a brain-computer interface device 5, a plurality of electrode sheets and a lead wire 4; the brain-computer interface device 5 is provided with an electroencephalogram data interface 6 for connecting an external computer equipment; the brain-computer interface is further provided with a circuit board, a wireless transmission module, a control module, a signal processing module, a rechargeable power supply and a plurality of signal interfaces; the electrode sheet is provided with an electrode interface 2, one end of the lead wire 4 is connected with the electrode interface 2, and the other end is connected with the signal interface.

[0027] By adopting the above technical scheme, a complete signal transmission and control link of "electrode sheet-conductor 4-brain-computer interface device 5-external computer equipment" is constructed. The electrode sheet can directly act on the skull surface to collect electroencephalogram signals, the conductor 4 realizes the signal and power connection between the electrode sheet and the brain-computer interface device 5, the brain-computer interface device 5 processes, transmits and powers the whole body through each functional module, and the electroencephalogram data interface 6 guarantees the docking with the external computer equipment to realize the further analysis and storage of data. The overall structure is clear, which lays a hardware foundation for subsequent matrix collection and high-precision signal processing. At the same time, the design of the electrode sheet can be flexibly arranged according to the needs of different monitoring areas on the skull surface, improving the applicability of the device.

[0028] Further, the electrode sheet includes a flexible substrate 1 and a plurality of electrode contacts 3 arranged in a matrix on the bottom of the flexible substrate 1, and an electrode interface 2 is arranged on one side of the flexible substrate 1; the inside of the flexible substrate 1 is provided with a connecting line for connecting the electrode contacts 3 and the electrode interface 2.

[0029] By adopting the above technical scheme, the flexible substrate 1 can adapt to the arc profile of the skull surface, and can closely fit the skull surface during use, reducing the displacement of the electrode sheet caused by head movement, solving the problem of poor adhesion of the existing electrode to the skull surface, and ensuring the stability of signal collection. On the other hand, the plurality of electrode contacts 3 are arranged in a matrix, which can collect signals from specific areas on the skull surface in all directions and at high density. Compared with the existing single or scattered collection method, the spatial resolution of signal collection is greatly improved, and the electroencephalogram signals from a larger area on the skull surface can be fully captured. At the same time, the internal connecting line design avoids line exposure, reduces the risk of line damage, and makes the electrode sheet structure more compact, improving the safety and convenience of use.

[0030] Further, the electrode contact 3 includes an insulating base, an insulating layer 33 is arranged in the middle of the bottom of the insulating base, an electric stimulation area 31 and a signal feedback receiving area 32 are arranged on both sides of the insulating layer 33, a stimulating electrode and a signal electrode are arranged in the flexible substrate 1 respectively on both sides of the insulating layer 33, a stimulating electrode end and a signal electrode end are arranged in the electrode interface 2, and the stimulating electrode and the signal electrode are connected to the stimulating electrode end and the signal electrode end respectively through the connecting line.

[0031] By adopting the technical scheme, the electrode contact 3 realizes the integrated function of "stimulation-feedback". The insulating base provides stable support for the electric stimulation area 31 and the signal feedback receiving area 32, and the insulating layer 33 in the middle can effectively isolate the electric stimulation signal and the feedback signal, avoid mutual interference, and ensure the accuracy of the electric stimulation output and the purity of the feedback signal collection. The stimulation electrode forms a path with the brain-computer interface device 5 through the stimulation electrode end and the connecting line, can output accurate electric stimulation to the specific area of the skull surface according to the demand, and is used in the scene of nerve regulation, etc. The signal electrode transmits the collected electroencephalogram feedback signal to the brain-computer interface device 5 through the signal electrode end and the connecting line, meets the clinical and research demand of "stimulation first and then monitoring" or "stimulation and monitoring simultaneously", enriches the device function, and improves the support ability for brain function research and disease diagnosis.

[0032] Further, the stimulation electrode end and the signal electrode end are integrated into an interface end at the electrode interface 2, and are connected with the signal interface through the lead wire 4.

[0033] By adopting the technical scheme, the integrated design of the electrode interface 2 is realized. The originally independent stimulation electrode end and the signal electrode end are integrated into an interface end, which can reduce the number of interfaces on the electrode sheet, make the electrode sheet structure more simple, and reduce the risk of connection failure caused by too many interfaces. At the same time, the single interface end is connected with the signal interface through one lead wire 4, which reduces the use amount of the lead wire 4, reduces the complexity of the whole device, and is convenient for medical staff or researchers to install and dismount the electrode sheet, improves the operation convenience. Especially in the scene of needing to perform electric stimulation and signal collection at the same time, the connection process can be effectively simplified, and the work efficiency is improved.

[0034] Further, the flexible base 1 is made of one of medical silicone rubber and polyimide film, and the thickness is 0.5-3.0 mm.

[0035] By adopting the technical scheme, the performance of the flexible base 1 is ensured from the aspects of material and size. The medical silicone rubber has good biocompatibility, no irritation and no toxicity when contacting with human tissues, can avoid causing human allergic or rejection reaction, and has excellent flexibility, which can closely fit the contours of different parts of the skull surface. The polyimide film has excellent high-temperature resistance and chemical corrosion resistance, and also has good flexibility and mechanical strength, and can maintain stable performance in complex use environment. The selection of the two materials can meet the safety and reliability requirements of medical equipment. The thickness of 0.5-3.0 mm can ensure that the flexible base 1 has sufficient structural strength, avoids damage in the installation and use process, maximally reduces the influence of the base thickness on signal collection, reduces the signal attenuation in the base, and makes the whole electrode sheet lighter and thinner, which can be folded.

[0036] Further, the interval between adjacent electrode contacts 3 of the electrode sheet is 0.5-2.0 mm.

[0037] By adopting the above technical solution, the distribution density of the electrode contacts 3 is optimized. The interval range of 0.5-2.0 mm can balance between "signal acquisition accuracy" and "overall size of the electrode sheet": too small interval can improve the acquisition accuracy, but will lead to too many electrode contacts 3, increase the size of the electrode sheet, increase the cost, and may increase the risk of signal interference; too large interval will reduce the spatial resolution of signal acquisition, and cannot achieve comprehensive acquisition. The interval range can ensure high-density coverage of the specific area of the skull surface within the limited area of the electrode sheet, which can capture subtle changes in the brain electrical signal and meet the demand for high-precision monitoring, and can avoid the inconvenience caused by the large size of the electrode sheet, and is suitable for monitoring areas of different sizes of the skull surface.

[0038] Further, the control module can accurately control the independent operation of each electrode sheet; and the signal processing module can process the feedback signal collected by the electrode sheet.

[0039] By adopting the above technical solution, the control accuracy and signal quality of the device are improved. The independent control of each electrode sheet by the control module means that a specific electrode sheet can be started or stopped according to actual needs, and the electrical stimulation parameters (such as stimulation intensity and frequency) or signal acquisition mode of a single electrode sheet can be adjusted, avoiding the waste of resources and the limitation of functions caused by the "overall control" of traditional devices. For example, when studying the function of a certain brain region, only the electrode sheet corresponding to the region can be started to reduce irrelevant signal interference; the signal processing module can filter, amplify, and denoise the collected feedback signal to remove environmental interference (such as power frequency interference and electromyographic interference) and noise, and extract pure brain electrical signals, thereby solving the problem of low signal-to-noise ratio of existing electrode collected signals and providing a high-quality signal basis for subsequent data analysis and diagnosis.

[0040] Further, the wireless transmission module is a Bluetooth module, which transmits wireless control instructions and processed feedback signals.

[0041] By adopting the above technical solution, wireless operation and data transmission of the device are realized. The Bluetooth module has the characteristics of low power consumption, stable transmission, and strong anti-interference ability. Its function of transmitting wireless control instructions can break away from the limitation of traditional wired control on the use range of the device, so that medical staff or researchers can flexibly adjust the device parameters within a certain distance; the function of transmitting processed feedback signals can reduce the number of wires 4, reduce the complexity of the device as a whole, and avoid the displacement of the electrode sheet or signal interruption caused by pulling the wires 4, thereby further improving the stability and convenience of the use of the device, especially in monitoring scenarios.

[0042] Furthermore, the rechargeable power source is a rechargeable lithium battery, and it is charged wirelessly.

[0043] By adopting the above technical solutions, the device's battery life and ease of use are ensured. Rechargeable lithium batteries are characterized by high energy density, small size, light weight, and long cycle life, providing stable and continuous power support for the various functional modules of the brain-computer interface device 5, meeting the needs of long-term monitoring or treatment. Wireless charging eliminates the need for a physical charger connection, avoiding the wear and poor contact problems caused by repeated plugging and unplugging of traditional wired charging interfaces, thus extending the power supply's lifespan. Furthermore, charging does not affect the installation of electrode pads or signal acquisition, achieving "charging and use in parallel," enhancing the device's practicality, especially suitable for clinical scenarios requiring continuous operation.

[0044] Example 2, as Figure 4 As shown, it is basically the same as the embodiment, except that the signal interface includes several stimulation electrode interfaces 2 and signal electrode interfaces 2. The stimulation electrode ends and signal electrode ends are respectively connected to the stimulation electrode interface 2 and the signal electrode interface 2 through wires 4.

[0045] By adopting the above technical solution, independent transmission of stimulation and feedback signals is achieved. Several stimulation electrode interfaces 2 and signal electrode interfaces 2 correspond to the stimulation and signal electrode ends of different electrode pads, respectively, ensuring that each stimulation and feedback signal has its own dedicated transmission channel. This avoids crosstalk between signals from different channels, further improving the stability and accuracy of signal transmission. Furthermore, the independent interface design facilitates individual debugging and control of the stimulation or signal acquisition functions of a single electrode pad. For example, stimulation parameters can be adjusted for a specific electrode pad without affecting the signal acquisition of other electrode pads, enhancing the flexibility and controllability of the device. This makes it suitable for scenarios involving differentiated research or treatment of different brain regions.

[0046] Working principle: the rechargeable lithium battery in the brain-computer interface device 5 is charged through the wireless charging plate; when in use, the electrode pieces are respectively attached to the areas on the surface of the skull according to the monitoring requirements, the flexible substrate 1 can deform with the contour of the skull, ensuring that the electrode contacts 3 are in close contact, the electrode interface 2 of the electrode pieces is connected with the signal interface of the brain-computer interface device 5 through the wire 4, the electroencephalogram data interface 6 of the brain-computer interface device 5 can be connected with an external computer equipment, and a special data acquisition and analysis software is installed. The external computer equipment sends control instructions through the software, the instructions are transmitted to the control module through the electroencephalogram data interface 6 or the Bluetooth module, the control module adjusts the stimulation parameters of the specific electrode pieces according to the instructions, such as stimulation intensity and stimulation frequency, and transmits the stimulation parameters to the stimulating electrode through the signal interface, the wire 4 and the electrode interface 2, the stimulating electrode outputs electric stimulation to the surface of the skull through the electric stimulation area 31; at the same time, the signal feedback receiving area 32 collects the feedback electroencephalogram signals of the brain, and transmits the signals to the signal processing module through the signal electrode, the internal connecting line, the electrode interface 2, the wire 4 and the signal interface, the signal processing module processes the signals, and then transmits the pure signals to the external computer equipment through the Bluetooth module or the electroencephalogram data interface 6, the external computer equipment stores, displays and analyzes the signals, and realizes the monitoring of the brain function or the evaluation of the effect of neural regulation.

[0047] The specific embodiments are only an explanation of the present application, and are not a limitation of the present application, and those skilled in the art can make modifications to the embodiments without creative contribution according to the needs after reading the specification, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A matrix-type contact electrode device for the surface of the skull, characterized in that, The device includes a brain-computer interface (5), several electrode pads and wires (4); the brain-computer interface (5) is provided with an EEG data interface (6) for connecting to external computer equipment; the brain-computer interface is also provided with a circuit board, a wireless transmission module, a control module, a signal processing module, a rechargeable power supply and several signal interfaces; the electrode pads are provided with electrode interfaces (2), one end of the wires (4) is connected to the electrode interface (2) and the other end is connected to the signal interface.

2. The matrix contact electrode device for the skull surface according to claim 1, characterized in that, The electrode sheet includes a flexible substrate (1) and a plurality of electrode contacts (3) arranged in a matrix at the bottom of the flexible substrate (1). An electrode interface (2) is provided on one side of the flexible substrate (1). A connecting line is provided inside the flexible substrate (1) for connecting the electrode contacts (3) and the electrode interface (2).

3. The matrix contact electrode device for the skull surface according to claim 2, characterized in that, The electrode contact (3) includes an insulating base, an insulating layer (33) is provided in the middle of the bottom of the insulating base, an electrical stimulation area (31) and a signal feedback receiving area (32) are provided on opposite sides of the insulating layer (33), the electrical stimulation area (31) and the signal feedback receiving area (32) are respectively provided with a stimulation electrode and a signal electrode inside the flexible substrate (1), the electrode interface (2) is provided with a stimulation electrode end and a signal electrode end, and the stimulation electrode and the signal electrode are respectively connected to the stimulation electrode end and the signal electrode end through connecting wires.

4. The matrix contact electrode device for the skull surface according to claim 3, characterized in that, The stimulation electrode and the signal electrode are integrated into an interface at the electrode interface (2) and connected to the signal interface via a wire (4).

5. A matrix contact electrode device for the skull surface according to claim 3, characterized in that, The signal interface includes several stimulation electrode interfaces (2) and signal electrode interfaces (2), and the stimulation electrode ends and signal electrode ends are respectively connected to the stimulation electrode interfaces (2) and the signal electrode interfaces (2) through wires (4).

6. The matrix contact electrode device for the skull surface according to claim 2, characterized in that, The flexible substrate (1) is made of either medical silicone rubber or polyimide film, with a thickness of 0.5-3.0 mm.

7. A matrix contact electrode device for the skull surface according to claim 2, characterized in that, The distance between adjacent electrode contacts (3) of the electrode sheet is 0.5-2.0 mm.

8. The matrix contact electrode device for the skull surface according to claim 1, characterized in that, The control module can precisely control each electrode to work independently; the signal processing module can process the feedback signals collected by the electrical stimulation of the electrode pads.

9. A matrix contact electrode device for the skull surface according to claim 8, characterized in that, The wireless transmission module is a Bluetooth module, which transmits wireless control commands and processed feedback signals.

10. A matrix contact electrode device for the skull surface according to claim 1, characterized in that, The rechargeable power source is a rechargeable lithium battery, which is charged wirelessly.

Images