Brain-computer interface signal acquisition device

Abstract

A brain-computer interface signal acquisition device comprises an electrode array, a first lead bundle, a signal conversion device and a master control device, the electrode array is arranged in a human skull and configured to acquire analog signals, and the electrode array comprises a plurality of electrodes; the signal conversion device is adjacent to the electrode array and configured to convert analog signals into digital signals, the signal conversion device is connected with the electrode array through a first wire bundle, the first wire bundle comprises a plurality of first wires, and the plurality of first wires are in one-to-one correspondence with the plurality of electrodes; the main control device is arranged at the position far away from the head of the human body and is configured to receive and process the digital signals. The brain-computer interface signal acquisition device solves the problems that in the field of invasive / semi-invasive brain-computer interfaces, an existing brain-computer interface signal acquisition device is high in power consumption, prone to heating, large in signal loss, poor in human body compatibility and the like.

Description

Technical Field

[0001] The present disclosure relates to the technical field of brain-computer interfaces, and particularly to a signal acquisition device for an invasive / semi-invasive brain-computer interface. Background Art

[0002] A brain-machine interface (BMI; Brain Computer Interface, BCI) is a transformative human-machine interaction technology, which refers to the technology of directly connecting the brain to external devices. It allows brain signals to directly control external devices or receive information from external devices. According to the different interface methods, brain-machine interfaces can be divided into three types: invasive, non-invasive, and semi-invasive. Invasive brain-machine interfaces implant electrodes into the brain through surgery to obtain more accurate and high-resolution brain signals. According to the type of implanted electrodes, invasive brain-machine interface electrodes can be divided into cortical electrodes and depth electrodes. Currently, invasive brain-machine interfaces are mainly applied in the field of medical rehabilitation to help people with movement or perception disorders to carry out rehabilitation training or control external devices to improve their quality of life. Semi-invasive brain-machine interfaces are between invasive and non-invasive. They usually need to implant electrodes under the scalp, close to the dura mater but do not need to directly penetrate the cerebral cortex to collect signals for electrocorticogram (ECoG) monitoring.

[0003] The human brain consists of a large number of neuron cells responsible for processing information and carrying out thinking activities, forming a neural network, thereby generating consciousness and thinking activities. Cortical electrodes collect the electrical signals of neurons near the cerebral cortex to obtain information from the human brain. If relying solely on a single cortical electrode, only the electrical signals of one neuron can be recorded, or the electrical signals related to a small number of neurons can be recorded simultaneously. Based on the electrical signals of a single or a small number of neurons, it is often difficult to completely and accurately extract the information required by the brain-machine interface device, and thus it is difficult to control external devices or complete information interaction with external devices. In the prior art, multiple cortical electrodes are often integrated into an electrode array. For example, Figure 1 An invasive cortical electrode array, called the Utah Array electrode, is disclosed. This electrode array is the core technology of Blackrock Company and has been widely used in current brain-machine interface products.

[0004] The cortical electrode arrays used in the prior art can collect human brain signals, helping the human body restore tactile functions, improve the movement of one's own limbs / prosthetics, and the ability to control digital devices. For example, in the academic paper "An integrated brain-machine interface platform with thousands of channels", a brain-computer interface product using a cortical electrode array is disclosed. The electrode array of this product is connected to a miniaturized application-specific integrated circuit (ASIC), which consists of three parts: an independent programmable amplifier, an on-chip analog-to-digital converter, and a peripheral control circuit for serializing digital outputs. In the prior art, this application-specific integrated circuit is arranged outside the human scalp and connected to the electrode array located inside the skull. The disadvantages of this product are as follows: 1. The human head is a vulnerable part, and the application-specific integrated circuit is exposed on the head without protection, risking being damaged by impact, which in turn poses a great risk to the life and health of the human body. 2. Due to the large number of electrodes integrated in the electrode array, the overall power consumption of the application-specific integrated circuit may be relatively large. In some special environments, an integrated circuit with high power consumption will experience heat generation or discharge phenomena. These heat generation or discharge phenomena occurring in the human brain area will seriously threaten the safety and health of the human body.

[0005] Cortical electrode arrays are also widely used in scientific research. For example, the Chinese patent document with the publication number CN118466748A discloses a method for evaluating the performance of an electrode array for a brain-computer interface. Among them, the brain-computer interface electrode array is implanted in a specific brain region of a test subject and contains a given number of electrode channels. Each electrode channel is used to record the neural activity data in the specific brain region. An original data set is constructed based on the behavioral data of the test subject performing a preset brain control task using the brain-computer interface, and the neural activity data collected by each electrode channel corresponding to the behavioral data. The technical solution disclosed in this document is mainly used for electrode array performance testing and cannot realize the daily use of brain-computer interface products.

[0006] Another type of signal acquisition device for brain-computer interfaces comes from the field of depth electrodes. Depth electrodes are implanted into the brain to collect signals from neurons deep within the brain. Depth electrodes can improve the symptoms of certain neurological diseases by stimulating specific nuclei in the brain and can also be used to directly control external devices. For example, PCT patent document WO2024006998A2 discloses a neural monitoring and diagnostic system in which a depth electrode probe 100 is implanted into the human brain. Its embodiments include a neural monitoring device that is coupled to an individual and configured to detect neural activity from the individual; a control unit that is operably coupled to the neural monitoring device and removably coupled to the human body, where the control unit is configured to interact with an electronic device when the individual generates neural activity. Another example is that US patent document US11738194B2 discloses a closed-loop computer-brain interface device, and its neuron stimulation electrode 101 is also a depth electrode. The neuron stimulation electrode 101 is implanted into an individual's brain 100 for the purpose of providing neuromodulation therapy, such as for treating PD symptoms, Alzheimer's disease, epilepsy, depression, etc. The disadvantages of the signal acquisition device based on depth electrodes are as follows: 1. Due to the depth of implantation into the brain, it is difficult for depth electrodes to form an array to collect signals from a fixed area, and both the collected signals and communication channels are very limited. 2. As the depth of electrode implantation into the human brain increases, the risk and complexity of the surgery will increase significantly.

[0007] Currently, the brain-computer interfaces that select cortical electrode arrays or semi-invasive electrode arrays cannot adopt the product structure of the aforementioned depth electrodes. An embodiment in PCT patent document WO2024006998A2 discloses an embodiment in which three depth electrodes are commonly connected to an electronic device. However, for an electrode array, the technical solution in this embodiment cannot be implemented. The number of electrodes included in an electrode array ranges from dozens to thousands or even more, and the number of wires to be connected needs to correspond to the number of electrodes. This will inevitably result in a very thick wire harness formed by multiple wires. The surgical difficulty of implanting such a thick wire harness into the body is relatively large, and when exposed outside the body, it will cause inconvenience in movement and be easily damaged. At the same time, since the analog signals generated by the electrodes attenuate severely, the power consumption of the entire device must be increased. After increasing the power consumption, a large number of wires and electrodes will also generate heat problems, posing a threat to the safety and health of the human brain. Therefore, for electrode arrays that penetrate the cerebral cortex or semi-invasively contact the cerebral cortex, a new product structure is needed to solve the above problems.

[0008] The above information is only presented as background information to help understand the present disclosure. No confirmation or other relevant indication has been made as to whether any of the above can be used as prior art for the present disclosure. Summary of the Invention

[0009] Embodiments of the present disclosure solve the problems in the aforementioned brain-computer interface signal acquisition device. A signal acquisition device for an invasive / semi-invasive brain-computer interface is provided.

[0010] A first aspect of the present disclosure provides a brain-computer interface signal acquisition device, including: an electrode array, a first wire bundle, a signal conversion device, and a main control device, wherein: the electrode array is disposed inside the human skull and configured to acquire analog signals, and the electrode array includes a plurality of electrodes; the signal conversion device is adjacent to the electrode array and configured to convert the analog signals into digital signals, the signal conversion device is connected to the electrode array through the first wire bundle, the first wire bundle includes a plurality of first wires, and the plurality of first wires correspond to the plurality of electrodes one by one; the main control device is disposed at a position far from the human head and configured to receive and process the digital signals.

[0011] For example, in at least one embodiment, a second wire is further included, the main control device is connected to the signal conversion device through the second wire, and the length of the second wire is more than 10 times the length of the first wire bundle.

[0012] For example, in at least one embodiment, the signal conversion device and the second wire are disposed under the human skin, and two ends of the second wire are respectively connected to the signal conversion device and the main control device.

[0013] For example, in at least one embodiment, the main control device is disposed under the human epidermis; the diameter of the first wire bundle is greater than that of the second wire.

[0014] For example, in at least one embodiment, the main control device is disposed at the center of the human chest or under the armpit.

[0015] For example, in at least one embodiment, the second wire is disposed in a human vein.

[0016] For example, in at least one embodiment, the signal conversion module is disposed at a position adjacent to the electrode array inside the human skull.

[0017] For example, in at least one embodiment, the signal conversion module is disposed outside the human skull and inside the human head skin, and the signal conversion device and the electrode array are respectively located at corresponding positions inside and outside the human skull.

[0018] For example, in at least one embodiment, the signal conversion device includes a first high-frequency antenna configured to transmit the digital signals to the main control device; the signal conversion device includes a second high-frequency antenna configured to receive electrical energy transmitted by an external power source.

[0019] For example, in at least one embodiment, the signal conversion device includes a signal processing module, an analog-to-digital conversion module, and an output module. Among them, the signal processing module is connected to the electrode array and configured to receive the analog signal transmitted by the first wire bundle, amplify and filter the analog signal, and then transmit it to the analog-to-digital conversion module; the analog-to-digital conversion module is connected to the signal processing module and configured to convert the processed signal into a digital signal; the output module is connected to the analog-to-digital conversion module and configured to output the converted digital signal to the main control device. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present disclosure and do not limit the present disclosure.

[0021] Figure 1 is an electrode array in the prior art;

[0022] Figure 2 is a connection relationship diagram of a brain-computer interface signal acquisition device according to an embodiment of the present disclosure;

[0023] Figure 3 is a connection relationship diagram of another brain-computer interface signal acquisition device according to an embodiment of the present disclosure;

[0024] Figure 4 is a schematic structural diagram of a brain-computer interface signal acquisition device according to an embodiment of the present disclosure;

[0025] Figure 5 is a schematic structural diagram of another brain-computer interface signal acquisition device according to an embodiment of the present disclosure;

[0026] Figure 6 is a schematic diagram of the modules of a brain-computer interface signal acquisition device according to an embodiment of the present disclosure. Detailed Embodiments

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0028] Unless otherwise defined, technical terms or scientific terms used in this disclosure shall have the ordinary meanings as understood by those of ordinary skill in the art to which this disclosure pertains. The terms "first", "second" and similar terms used in this disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the elements or items appearing before this word cover the elements or items listed after this word and their equivalents, without excluding other elements or items. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Words such as "upper", "lower", "left" and "right" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly. In this disclosure, "a plurality of" means two or more.

[0029] According to an embodiment of the present disclosure, Figure 2 A signal acquisition device for a brain-computer interface is disclosed, including: an electrode array 1, a first wire bundle 2, a signal conversion device 3, and a main control device 5. Among them, the electrode array 1 is disposed inside the human skull and is an invasive / semi-invasive brain-computer interface electrode array. Compared with non-invasive brain-computer interface electrodes, which can only collect electroencephalogram (EEG) and other information of brain electrical signals outside the scalp, the invasive / semi-invasive brain-computer interface electrode array can collect intracortical electrical signals or electrocorticogram (ECoG) on the surface of the cerebral cortex. The signal quality and spatial resolution of the signals collected by the invasive / semi-invasive brain-computer interface electrode array are significantly better than those of non-invasive brain-computer interface electrodes. At the same time, since the invasive / semi-invasive brain-computer interface electrode array is disposed in or on the surface of the cerebral cortex, the surgical risk and complexity are significantly lower than those of deep electrodes disposed inside the brain.

[0030] Preferably, the electrode array 1 is disposed inside the human skull and includes a plurality of electrodes, and the plurality of electrodes are integrated on an electrode substrate. The electrode array 1 is configured to collect analog signals and can simultaneously collect the potential signals of multiple neurons in the same area. The thinking activities of the human brain are complex and require a large number of neuron interactions. Compared with collecting signals based on a single electrode, controlling based on the multi-channel signals collected by the electrode array 1 has higher accuracy and scientificity.

[0031] Preferably, the electrode array 1 includes at least 16 electrodes.

[0032] Preferably, the electrode array 1 includes 36 electrodes, including 1 ground electrode, 2 - 3 reference electrodes, and 32 - 33 measurement electrodes. Among them, the ground electrode is connected to the scalp or the skin of other parts of the human body to provide a stable potential reference for the measurement system. The setting of the ground electrode can reduce and eliminate measurement errors caused by external factors such as the environment and human movement. The reference electrode is set at one end of the substrate of the electrode array 1 far from the target measurement position to provide a potential reference for the measurement system. Based on the measurement results of the reference electrode, the potential signals measured by the measurement electrodes can be converted into potential differences, which is beneficial to subsequent signal processing, calculation, and data analysis.

[0033] Preferably, the electrode array 1 includes 1024 electrodes. In a preferred embodiment, the number of electrodes in the electrode array 1 is limited by the current technical level. From the perspective of demand, for complex application scenarios such as human sensory function and memory restoration, and human brain control of external devices, the electrode array 1 needs to integrate more electrodes and communication channels. Therefore, it can be understood that the electrode array 1 can include a larger order of magnitude of the number of electrodes.

[0034] Preferably, the electrode array 1 is set as a flexible electrode, and the whole is wrapped with a flexible material with good biocompatibility. Near the measurement point of each electrode, a metal material with good biocompatibility is coated. Utilizing the conductivity of the metal material, the electrical signals of the cerebral cortex and the nearby areas are collected. The metal material is preferably selected from metals suitable for being set inside the human skull, such as platinum and iridium oxide. The use of flexible materials can avoid the damage to the human body caused by rigid materials in special cases. The array substrate of the electrode array 1 can be fixedly arranged on the inner side of the human skull by means of standardized bone nails, adhesives with good biocompatibility, etc.

[0035] Preferably, the flexible electrode array of the electrode array 1 as a whole or a part of the flexible array substrate is made of a shape memory material, such as a shape memory alloy. The shape memory material can change its shape in special cases to avoid damage to the human body, and at the same time can return to the normal working shape and state after the external special situation disappears.

[0036] Preferably, the main control device 5 is set at a position far from the human head. Such a setting can effectively avoid the damage to the safety and health of the human brain caused by problems such as heat generation and discharge inside the main control device 5. At the same time, it can avoid the bumps and scratches that are likely to occur in the human head area and damage the main control device 5 itself. It can be understood that for invasive / semi-invasive brain-computer interface products, a craniotomy is required to implant a single electrode or an electrode array into the human brain, and any device damage may bring serious consequences. Therefore, setting the main control device 5 at a safe position far from the human head can effectively reduce the above risks.

[0037] Preferably, the main control device 5 is configured to receive and process digital signals from the signal conversion device 3. The main control device 5 analyzes and processes the digital signals, and converts the processed information into instructions that can be recognized by a computer to achieve human-computer interaction. Based on the real-time acquisition of the electrode array 1 and the real-time processing and transmission of the acquired data, the main control device 5 can interpret signals from the human brain and control external actuators according to the thinking and consciousness of the human brain to perform actions desired by the human brain. For example, controlling a mouse, keyboard, mobile device, wheelchair, prosthetic limb, etc.

[0038] Preferably, the main control device 5 includes a power supply module to provide electrical energy for the overall operation of the device.

[0039] Preferably, the signal conversion device 3 and the electrode array 1 are adjacently arranged on the human head. The signal conversion device 3 is adjacent to the electrode array 1 and is configured to convert the analog signals collected by the electrode array 1 into digital signals. The electrical signals collected by the electrode array 1 are analog signals, and obvious signal attenuation will occur as the transmission distance of the analog signals increases during transmission. When the main control device 5 is arranged at a position far from the human head, the transmission distance of the analog signals collected by the electrode array 1 to the main control device 5 is relatively long. If the analog signals are directly transmitted, the power consumption of the device must be greatly increased, thus bringing potential safety hazards and affecting the service life of the device. At the same time, during the transmission of analog signals, the analog signals collected by each electrode require a separate wire for transmission. Given that a large number of electrodes are integrated in the electrode array, the corresponding wire bundle will inevitably contain a large number of wires. It is difficult to arrange a thick wire bundle inside the human body and it also has a great impact on the human body. When the signal conversion device 3 and the electrode array 1 are adjacently arranged, the transmission distance of the analog signals is very short, the attenuation of the analog signals can be ignored, and at the same time its physical volume is smaller, which can be conveniently arranged in the human brain.

[0040] Preferably, the signal conversion device 3 is connected to the electrode array 1 through a first wire bundle 2. The first wire bundle 2 includes a plurality of first wires, and the plurality of first wires correspond one-to-one to the plurality of electrodes integrated on the electrode array 1. This connection method is conducive to the signal conversion device 3 independently collecting the electrical signals from each electrode and processing the electrical signals from each electrode according to the preset order and method.

[0041] Preferably, as Figure 3 shown, the main control device 5 is connected to the signal conversion device 3 through a second wire 4, and the second wire 4 can be configured as a single wire. Only digital signals are transmitted between the main control device 5 and the signal conversion device 3, which is conducive to configuring the second wire 4 with a simple structure and a smaller diameter. At the same time, since the attenuation during the transmission of digital signals is not obvious, the overall power consumption of the device can be greatly reduced. The simple structure, smaller diameter and lower power consumption can effectively reduce the arrangement difficulty of the second wire 4 in the embodiments of the present disclosure.

[0042] Preferably, the length of the second wire 4 is more than 10 times the length of the first wire bundle 2. When the positions and routing paths of the electrode array 1 and the main control device 5 are basically determined, the total lengths of the first wire bundle 2 and the second wire 4 are also limited by the above conditions. At this time, the position of the signal conversion device 3 should be as close as possible to the electrode array 1, that is, the length of the first wire bundle 2 is shortened as much as possible, and the length of the second wire 4 is correspondingly extended. Based on the transmission characteristics of analog signals and digital signals, the relatively short first wire bundle 2 can reduce the power consumption of the device and reduce the difficulty and complexity of arranging the wire bundle itself in the human body. The relatively short first wire bundle 2 and the relatively long second wire 4 can reduce the attenuation of the analog signal, thereby reducing the power consumption of the entire device. At the same time, since the second wire 4 is thinner and has a simple structure, the difficulty of arranging it is less than that of the first wire bundle 2.

[0043] Preferably, the signal conversion device 3 and the second wire 4 are arranged under the human skin, and both ends of the second wire 4 are respectively connected to the signal conversion device 3 and the main control device 5. Arranging under the human skin means that the signal conversion device 3 and the second wire 4 are protected by the human skin, and at the same time, the influence of the signal conversion device 3 and the second wire 4 on human activities is minimized. The signal conversion device 3, the electrode array 1 and the first wire bundle 2 can be implanted into the human brain simultaneously during the operation, and the second wire 4 can be implanted into the human skin using a minimally invasive method in the prior art, extending from the human brain to the neck and then to the trunk.

[0044] Preferably, the second wire 4 is arranged in a human vein. Both ends of the second wire 4 can penetrate the blood vessel wall of the vein and enter the interior of the vein. It is arranged inside the vein along the vein path of the human head, neck and chest. Such an arrangement is beneficial to reducing the surgical difficulty of implanting the second wire 4 and reducing the harm of the second wire 4 to the human body.

[0045] Preferably, the diameter of the first wire bundle 2 is larger than that of the second wire 4. Since the signal conversion device 3 has converted the analog signal transmitted by the first wire bundle 2 into a digital signal, the second wire 4 itself does not need to select a thicker wire. The first wire bundle 2 itself includes multiple first wires. When selecting the second wire 4, a thinner wire should be selected as much as possible while ensuring performance. Such a setting is beneficial to reducing the influence and harm of the second wire 4 on the human body. Due to the reason that the second wire 4 can be made very thin, when the second wire 4 is arranged in the vein, its influence on the venous blood flow is very small when arranged in a relatively thick vein.

[0046] Preferably, the main control device 5 is arranged under the human epidermis. The arrangement position of the main control device 5 can be selected in a relatively flat area of the human body so as to be arranged under the human epidermis. This is beneficial for the main control device 5 to be protected by the human skin and at the same time minimizes the impact of the main control device 5 on human activities. When arranged under the human epidermis, the main control device 5 can reserve a communication interface on the human skin or can be provided with a wireless communication module in the prior art to realize the reception of external signals and the control of the actuator.

[0047] Preferably, the main control device 5 is arranged at the center of the human chest or under the armpit. The center of the human chest or under the armpit is a position that is habitually protected in daily life. The skin of this part is relatively flat, which can accommodate the size of the main control device 5 and at the same time meets the condition of being far from the head. The distance between the center of the human chest or under the armpit and the human head can ensure that the heat generation or discharge of the main control device 5 will not affect the human brain.

[0048] Preferably, as Figure 4 shown, the signal conversion device 3 is arranged at a position adjacent to the electrode array 1 within the human skull. The signal conversion device 3 only has the functions of data processing, conversion and output, and can achieve a millimeter-level size, thus creating the possibility for its implantation inside the human skull. Like the electrode array 1, the signal conversion device 3 can be integrally wrapped with a material having good biocompatibility and can be fixed to the inner side of the skull by standardized bone nails or adhesives with good biocompatibility.

[0049] Preferably, as Figure 5 shown, the signal conversion device 3 is arranged between the human skull and the human head skin outside the human skull. The signal conversion device 3 and the electrode array 1 are respectively located at corresponding positions inside and outside the human skull. The signal conversion device 3 can also be fixed to the outer side of the skull at a position corresponding to the electrode array 1 by standardized bone nails or adhesives with good biocompatibility. The first wire bundle 2 penetrates the human skull and is respectively connected to the electrode array 1 and the signal conversion device 3 at both ends. The signal conversion device 3 and the electrode array 1 being respectively located at corresponding positions inside and outside the human skull can ensure that the first wire bundle 2 has the shortest length.

[0050] Preferably, the signal conversion device 3 includes a first high-frequency antenna configured to transmit the digital signal to the main control device 5. The signal conversion device 3 includes a second high-frequency antenna configured to receive the electric energy transmitted by an external power source. The first high-frequency antenna and the second high-frequency antenna are separately arranged, which helps to avoid the mutual influence between signal transmission and reception. Among them, the external power source can be integrated inside the main control device 5. In this embodiment, related wireless communication devices such as the electrode array 1, the first wire bundle 2, the signal conversion device 3, and the high-frequency antenna constitute a wireless passive sensor. Due to the absence of the influence of the second wire 4, the setting of the main control device 5 can be more flexible. It can be implanted at a position far from the head of the human body or can be set in a device or actuator around the human body. The solution of setting the main control device 5 in a device or actuator around the human body can avoid the harm caused to the human body by the operation of implanting the main control device 5.

[0051] Preferably, as Figure 6 shown, the signal conversion device 3 includes a signal processing module 31, an analog-to-digital conversion module 32, and an output module 33. Among them, the signal processing module 31 is connected to the electrode array 1 and configured to receive the analog signal transmitted by the first wire bundle 2, amplify and filter the analog signal, and then transmit it to the analog-to-digital conversion module 32; the analog-to-digital conversion module 32 is connected to the signal processing module 31 and configured to convert the processed analog signal into a digital signal; the output module 33 is connected to the analog-to-digital conversion module 32 and configured to output the converted digital signal to the main control device 5.

[0052] There are also the following points to note:

[0053] (1) The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design.

[0054] (2) For clarity, in the drawings used to describe the embodiments of the present disclosure, the thickness of the devices, layers or regions is enlarged or reduced, that is, these drawings are not drawn according to the actual scale. It can be understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "under" another element, the element can be "directly" on or under the other element or there can be intermediate elements.

[0055] (3) Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0056] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. The protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A brain-computer interface signal acquisition device, comprising: An electrode array, a first wire bundle, a signal conversion device, and a main control device, wherein: The electrode array is disposed in a human skull and is configured to collect analog signals, and the electrode array includes a plurality of electrodes; The signal conversion device is adjacent to the electrode array and is configured to convert the analog signal into a digital signal, the signal conversion device is connected to the electrode array through the first wire bundle, the first wire bundle includes a plurality of first wires, and the plurality of first wires correspond to the plurality of electrodes one by one; The main control device is arranged at a position far away from the human head and is configured to receive and process the digital signal.

2. The brain-computer interface signal acquisition device according to claim 1, characterized in that: It also includes a second wire, through which the main control device is connected to the signal conversion device, and the length of the second wire is more than 10 times the length of the first wire bundle.

3. The brain-computer interface signal acquisition device according to claim 2, characterized in that: The signal conversion device and the second wire are arranged below the human skin, and two ends of the second wire are connected to the signal conversion device and the main control device respectively.

4. The brain-computer interface signal acquisition device according to claim 3, characterized in that: The main control device is arranged below the human body epidermis; The first wire bundle has a larger diameter than the second wire.

5. The brain-computer interface signal acquisition device according to claim 4, characterized in that: The main control device is arranged at the center of the human chest or under the armpit.

6. The brain-computer interface signal acquisition device according to claim 3, characterized in that: The second guide wire is arranged in a vein of a human body.

7. The brain-computer interface signal acquisition device according to claim 1, characterized in that: The signal conversion module is arranged inside the human skull and adjacent to the electrode array.

8. The brain-computer interface signal acquisition device according to claim 1, characterized in that: The signal conversion module is arranged inside the human head skin outside the human skull, and the signal conversion device and the electrode array are respectively located at corresponding positions inside and outside the human skull.

9. The brain-computer interface signal acquisition device according to claim 1, characterized in that: The signal conversion device includes a first high-frequency antenna, and the first high-frequency antenna is configured to transmit the digital signal to the main control device; The signal conversion device includes a second high-frequency antenna, and the second high-frequency antenna is configured to receive electric energy transmitted by an external power source.

10. The brain-computer interface signal acquisition device according to claim 1, characterized in that: The signal conversion device includes a signal processing module, an analog-to-digital conversion module, and an output module, wherein: The signal processing module is connected to the electrode array and is configured to receive the analog signal transmitted by the first wire bundle, amplify and filter the analog signal, and then transmit it to the analog-to-digital conversion module; The analog-to-digital conversion module is connected to the signal processing module and is configured to convert the processed signal into a digital signal; The output module is connected to the analog-to-digital conversion module and is configured to output the converted digital signal to the main control device.

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