Electroencephalogram signal acquisition sensor and acquisition device

Abstract

The invention provides an electroencephalogram signal acquisition sensor and an electroencephalogram signal acquisition device. The electroencephalogram signal acquisition sensor comprises a sleeve, an elastic piece installed in the sleeve and an electrode needle used for acquiring electroencephalogram signals in the state of being in contact with the head of a human body. The electrode needle comprises an electrode disc part and a plurality of needle bodies arranged on one side of the electrode disc part; the first end of the elastic piece abuts against the side face, away from the needle body, of the electrode disc part, and the other end of the elastic piece abuts against a fixing piece. At least one limiting protrusion is arranged on the peripheral face of the electrode disc part, a guide groove corresponding to the limiting protrusion is formed in the wall of the sleeve, the guide groove extends in the generatrix direction of the sleeve, and the limiting protrusion is clamped into the guide groove so that the electrode needle can stretch out and draw back within the allowable length range of the guide groove. Through the innovative design of the guide groove, the automatic adjusting function of the elastic piece and the stable sleeve structure, stable electrode contact can be kept under the condition of different head shapes and head circumferences of tested heads, and therefore the accurate electroencephalogram signal collecting effect is provided.

Description

Technical Field

[0001] The present invention relates to the technical field of electroencephalogram signal equipment, and in particular to an electroencephalogram signal acquisition sensor and an acquisition device. Background Art

[0002] In the field of EEG signal acquisition equipment, it is a common problem that the electrodes cannot fully contact the skin of each brain area due to the differences in the subjects' head shape and head circumference. This problem not only affects the quality of the electroencephalogram (EEG), but may also increase signal noise, affecting the accuracy and reliability of the data.

[0003] The head circumference of different subjects may vary greatly, resulting in different tightness of contact between the electrode and the skin. When the electrode is not in good contact with the skin, the quality of signal acquisition will be significantly affected. Especially in areas where the electrode contact is not sufficient, the signal strength may be weakened and the noise may increase, thus affecting the accuracy of the EEG. The head shape of each subject is different, resulting in different skin curvatures and electrode contact methods in the brain area. Some electrodes may deviate from the target area or fail to fully contact the skin due to differences in the curve of the skin. For example, areas such as the top of the head, the temporal region, and the occipital region may be affected differently, thus affecting the acquisition quality of the signals in these areas. Due to differences in head circumference, the electrode cap or electrode module worn may apply greater pressure to some areas and insufficient pressure to other areas. Excessive pressure may cause discomfort or skin irritation, while insufficient pressure cannot ensure good signal contact, thus affecting the clarity and stability of the signal.

[0004] Existing EEG signal acquisition equipment usually requires manual replacement of caps of different sizes or electrode lengths according to the subject's head shape. This method not only increases the complexity of the operation, but also takes time for personalized adjustment. For experiments or clinical situations where data needs to be acquired quickly, this manual adjustment method often affects work efficiency. Manually replacing electrode caps or electrode assemblies of different sizes may not be able to accurately fit the head shape of each subject, which may cause comfort problems. Different electrode lengths and cap sizes may have different adaptability to different individuals, especially when worn for a long time, which greatly affects the wearing comfort. Different electrode lengths or cap sizes may cause differences in the contact method and pressure distribution between the electrode and the skin in different experiments, thereby affecting the consistency and comparability of the data collected each time. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides an electroencephalogram signal acquisition sensor and an acquisition device to eliminate or improve one or more defects existing in the prior art.

[0006] In a first aspect, the present invention provides an electroencephalogram signal acquisition sensor, which comprises: a sleeve, an elastic member installed in the sleeve, and an electrode needle for acquiring electroencephalogram signals in a state of contact with a human head; The electrode needle comprises an electrode disk portion and a plurality of needle bodies arranged on one side of the electrode disk portion; The first end of the sleeve has an opening and a limiting rib, so that the needle body of the electrode needle extends from the end, and the electrode disk portion can be stuck at the position of the limiting rib to prevent it from falling out of the first end of the sleeve; The first end of the elastic member abuts against the side of the electrode disk portion away from the needle body, and the other end is used to abut against a fixing member, so that the needle body of the electrode needle can automatically adjust the telescopic length based on the head circumference of the subject; At least one limiting protrusion is provided on the outer peripheral surface of the electrode disk portion, and the wall portion of the sleeve has a corresponding guide groove, which extends along the generatrix direction of the sleeve. The limiting protrusion is inserted into the guide groove so that the electrode needle can be extended and retracted within the allowable length range of the guide groove.

[0007] In some embodiments, the wall portion of the sleeve further has a mounting groove connected to the guide groove, one end of the mounting groove extends to the middle of the guide groove, and the other end extends to the end of the sleeve away from the electrode needle.

[0008] In some embodiments, one end of the electrode disk portion facing the elastic member has a countersunk hole structure for docking with the elastic member.

[0009] In some embodiments, the electrode disk portion of the electrode needle includes a coaxially arranged main body section and a transition section, the main body section has a diameter greater than a diameter of the transition section, and the limiting protrusion is arranged on the outer peripheral wall of the main body section; The inner diameter of the opening of the first end of the sleeve is larger than the outer diameter of the transition section and smaller than the outer diameter of the main body section.

[0010] In some embodiments, there is an annular gap between the main section of the electrode disk portion and the inner wall of the sleeve, and there is also an annular gap between the transition section and the inner wall of the first end opening of the sleeve, so that the electrode disk portion can swing within a set angle range relative to the sleeve.

[0011] In the second aspect, the present invention provides an EEG signal acquisition device, which includes a cap body and at least one of the aforementioned EEG signal acquisition sensors; the cap body is made of soft material, and has an electrode hole at a set position for installing the EEG signal acquisition sensor; the middle part of the sleeve has a clamping structure for clamping the EEG signal acquisition sensor at the electrode hole position of the cap body.

[0012] In some embodiments, the clamping structure includes two convex ring structures arranged opposite to each other, and the two convex ring structures are spaced apart along the axial direction to form a clamping groove for clamping the cap body at a portion outside the electrode hole thereof.

[0013] In some embodiments, the EEG signal acquisition sensor also includes a bottom cover, which is used to be installed on the second end of the sleeve so that the fixing member can abut against the end of the elastic member facing away from the electrode needle; the bottom cover is provided with a wire hole for passing a signal line that transmits the electrode signal.

[0014] In the third aspect, the present invention provides an EEG signal acquisition device, which includes a head ring body and at least one of the aforementioned EEG signal acquisition sensors; the head ring body is made of a hard material, and has an electrode hole at a set position for installing the EEG signal acquisition sensor; the second end of the sleeve is open, so that the end of the elastic member directly abuts against the inner wall of the head ring body.

[0015] In some embodiments, the EEG signal acquisition device also includes an end cap, which is used to install the EEG signal acquisition sensor at the electrode hole position of the head ring body; the second end of the sleeve is formed with an annular protrusion, and the end cap presses the side surface of the annular protrusion or presses the first end surface of the sleeve, and the end cap is clamped, magnetically connected or connected with the electrode hole using fasteners.

[0016] In a fourth aspect, the present invention provides a signal acquisition device, comprising: an integrated device and an EEG device, the integrated device comprising a connection interface, a plurality of EEG detection points and a plurality of human body detection points, the connection interface being used to connect the EEG device, the EEG device comprising the aforementioned EEG signal acquisition device; the n human body detection points being used to detect n-channel human physiological signals when in an access state; the EEG device being used to detect Nn-channel EEG signals when the integrated device is connected via the connection interface; or, the Nn EEG detection points being used to detect Nn-channel EEG signals when the EEG device is not connected to the integrated device via the connection interface; N and n are both positive integers, and N is greater than n.

[0017] In some embodiments, the EEG device is used to detect EEG signals of N channels when the integrated device is connected through the connection interface and the human body detection point is not in an access state; or, the N EEG detection points are used to detect EEG signals of N channels when the EEG device is not connected to the integrated device and the human body detection point is not in an access state.

[0018] In some embodiments, a control circuit is further included; the control circuit includes: an analog integrated front end and N signal channel branches connected to the analog integrated front end, the N signal channel branches including M integrated signal channel branches and N - M electroencephalogram (EEG) signal channel branches, where both M and N are positive integers and N is greater than M; the integrated signal channel branches are used to select the positive human physiological signals and corresponding negative human physiological signals detected at the human body detection points, the positive EEG signals and corresponding negative EEG signals detected by the EEG device, or the positive EEG signals and corresponding negative EEG signals detected by the EEG device; the EEG signal channel branches are used to select the positive EEG signals and corresponding negative EEG signals detected by the EEG device, or the positive EEG signals and corresponding negative EEG signals detected by the EEG device; the analog integrated front end is used to calculate n human physiological signals based on the selected n positive human physiological signals and corresponding negative human physiological signals, and calculate N - n EEG signals based on the N - n positive EEG signals and corresponding negative EEG signals, where n is a positive integer and N is greater than n.

[0019] In the EEG signal acquisition sensor, EEG signal acquisition device, and acquisition device according to the embodiments of the present invention, through the innovative guide groove design, the automatic adjustment function of the elastic member, and the stable sleeve structure, it is possible to maintain stable electrode contact under the conditions of different subject head shapes and head circumferences, thereby providing an accurate EEG signal acquisition effect. The embodiments of the present invention adopt the design of the guide groove along the generatrix direction of the sleeve, which can ensure that the expansion and contraction of the electrode needle only occur in the linear direction, contributing to ensuring the accuracy and stability of the EEG signal and avoiding signal fluctuations or interferences caused by rotation.

[0020] The additional advantages, objectives, and features of the present invention will be partially described below and will become partially apparent to those of ordinary skill in the art after studying the following text, or may be learned through the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the specification and the drawings.

[0021] Those skilled in the art will understand that the objectives and advantages that can be achieved by the present invention are not limited to the above specifically described, and it will be more clearly understood from the following detailed description the above and other objectives that the present invention can achieve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and do not limit the present invention. The components in the drawings are not drawn to scale, but are only for showing the principles of the present invention. For the convenience of showing and describing some parts of the present invention, the corresponding parts in the drawings may be enlarged, that is, may become larger relative to other components in the exemplary device actually manufactured according to the present invention.

[0023] Figure 1 Schematic three - dimensional structure diagram of the electroencephalogram signal acquisition sensor in an embodiment of the present invention.

[0024] Figure 2 Schematic cross - sectional structure diagram of the electroencephalogram signal acquisition sensor in an embodiment of the present invention.

[0025] Figure 3 Schematic three - dimensional structure diagram of the electrode needle and the elastic member in an embodiment of the present invention.

[0026] Figure 4 Schematic structure diagram of the electroencephalogram signal acquisition sensor in another embodiment of the present invention.

[0027] Figure 5 Schematic partial structure diagram of the first electroencephalogram signal acquisition device in an embodiment of the present invention.

[0028] Figure 6 Schematic three - dimensional structure diagram of the second electroencephalogram signal acquisition device in an embodiment of the present invention.

[0029] Figure 7 Schematic cross - sectional structure diagram of the second electroencephalogram signal acquisition device at the position of the electroencephalogram signal acquisition sensor in an embodiment of the present invention.

[0030] Figure 8 Schematic structure diagram of the signal acquisition device in an embodiment of the present invention.

[0031] Figure 9 Schematic circuit diagram of the signal acquisition device in an embodiment of the present invention.

[0032] Reference numerals: 1. Sleeve; 11. Limit stop edge; 12. Guide groove; 13. Installation groove; 14. Clamping structure; 141. Convex ring structure; 142. Card slot; 15. Annular protrusion; 2. Elastic member; 3. Electrode needle; 31. Electrode disc part; 311. Limit protrusion; 312. Counterbore structure; 313. Main body section; 314. Transition section; 32. Needle body; 4. Signal line; 100. First electroencephalogram signal acquisition device; 110. Cap body; 120. Bottom cover; 200. Second electroencephalogram signal acquisition device; 210. Head ring body; 220. End cover; 5. Integrated device; 51. Connection interface; 52. Electroencephalogram detection point; 53. Human body detection point. Detailed implementation manners

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0034] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0035] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, elements, steps or components, but does not exclude the presence or addition of one or more other features, elements, steps or components.

[0036] It should also be noted that, unless otherwise specified, the term “connection” herein may refer not only to a direct connection but also to an indirect connection involving an intermediate.

[0037] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0038] The present invention provides an electroencephalogram (EEG) signal acquisition sensor and an acquisition device, which can be applied to a common first electroencephalogram (EEG) signal acquisition device with a soft cloth or rubber material as a carrier body, and can also be applied to a portable headband-type second electroencephalogram (EEG) signal acquisition device, aiming to solve the problem of poor contact between traditional electrodes and skin, especially to eliminate or reduce the influence of head circumference differences in EEG signal acquisition.

[0039] First, as Figures 1-3 As shown, the present invention provides an electroencephalogram signal acquisition sensor, which includes a sleeve 1, an elastic member 2 installed in the sleeve 1, and an electrode needle 3 for collecting electroencephalogram signals in a state of contact with a human head.

[0040] The electrode needle 3 includes an electrode disk portion 31 and a plurality of needle bodies 32 arranged on one side of the electrode disk portion 31; the needle body 32 described here may be provided with one or more needle bodies; the needle bodies 32 may be provided in parallel or in a conical shape.

[0041] The first end of the sleeve 1 has an opening and a limiting rib 11, so that the needle body 32 of the electrode needle 3 can extend from this end, and the electrode disk portion 31 can be stuck in the position of the limiting rib 11 to prevent it from escaping from the first end of the sleeve 1; this design ensures that the electrode needle 3 will not loosen or move during operation.

[0042] The first end of the elastic member 2 abuts against the side of the electrode disc portion 31 facing away from the needle body 32, and the other end is used to abut against a fixing member, so that the needle body 32 of the electrode needle 3 can automatically adjust its telescopic length based on the head circumference of the subject; the presence of the elastic member 2 provides the necessary elastic force, enabling the needle body 32 of the electrode needle 3 to automatically adjust its telescopic length, thereby adapting to changes in the head circumference or head shape of the subject. The elastic member 2 ensures that the electrode needle 3 always maintains an appropriate contact pressure with the skin.

[0043] At least one limiting protrusion 311 is provided on the outer peripheral surface of the electrode disc portion 31, and the wall portion of the sleeve 1 has a corresponding guiding groove 12. The guiding groove 12 extends along the generatrix direction of the sleeve 1, and the limiting protrusion 311 is engaged in the guiding groove 12, so that the electrode needle 3 can telescopically move within the allowable length range of the guiding groove 12. The design of the guiding groove 12 ensures that the telescopic movement of the electrode needle 3 is controlled, does not exceed the predetermined length range, and does not rotate.

[0044] In the above embodiment, the electroencephalogram signal acquisition sensor is in the form of a needle-type dry electrode. Through the innovative design of the limiting protrusion 311 and the guiding groove 12, the automatic adjustment function of the elastic member 2, and the stable structure of the sleeve 1, it can maintain stable electrode contact in the case of different head circumferences, thereby providing an accurate electroencephalogram signal acquisition effect. These structures and designs ensure that the electroencephalogram signal acquisition sensor can effectively adapt to different subjects during use, guaranteeing the quality and stability of the electroencephalogram signal.

[0045] Since the rotation of the electrode in the prior art may cause uneven contact or detachment of the electrode needle 3 from the skin, thereby affecting the signal quality. In the embodiment of the present invention, the guiding groove 12 is designed along the generatrix direction of the sleeve 1, which can ensure that the telescopic movement of the electrode needle 3 only occurs in the linear direction, avoiding rotational movement. Therefore, the electrode needle 3 can maintain a stable contact pressure when contacting the skin. Further, the linear telescopic movement of the electrode needle 3 along the generatrix direction ensures that the electrode is always parallel to the skin surface, reducing the change in the electrode position, which helps to ensure the accuracy and stability of the electroencephalogram signal and avoid signal fluctuations or interference caused by rotation. In addition, rotation may cause friction and local wear, resulting in damage to the electrode needle 3 or the skin surface. The linear telescopic design reduces this risk, thereby extending the service life of the electroencephalogram signal acquisition sensor. Since the telescopic movement of the electrode needle 3 only occurs in the linear direction, the control of the force is more direct and precise, and it can better adapt to the shapes of different head circumferences, ensuring that the contact force between the electrode needle 3 and the skin is uniform and appropriate, and avoiding uneven contact caused by rotation.

[0046] In some embodiments, such as Figure 1As shown, the wall of the sleeve 1 also has a mounting groove 13 connected to the guide groove 12, one end of the mounting groove 13 extends to the middle of the guide groove 12, and the other end extends to the end of the sleeve 1 away from the EEG signal acquisition sensor. The mounting groove 13 is mainly used for the installation and removal of the limiting protrusion 311 of the electrode disk portion 31 of the electrode needle 3. The limiting protrusion 311 is a part of the EEG signal acquisition sensor. During the installation or removal process, the limiting protrusion 311 needs to be correctly positioned through the mounting groove 13. This ensures that the EEG signal acquisition sensor can be firmly installed and can be easily removed when necessary. Under normal circumstances, the limiting protrusion 311 can only slide in the limiting groove and cannot enter the mounting groove 13. The design of the limiting groove limits the movement range of the limiting protrusion 311, ensuring the stability and safety of the EEG signal acquisition sensor. The limiting protrusion 311 maintains the correct position of the electrode needle 3 by sliding in the limiting groove, avoiding any excessive free movement or unnecessary deviation.

[0047] Optionally, the intersection of the limiting groove and the mounting groove 13 is designed to be vertical, which can ensure that the limiting protrusion 311 can only slide along the direction of the limiting groove during normal use, and cannot enter the mounting groove 13. When the EEG signal acquisition sensor is installed or removed, the limiting protrusion 311 transitions through the vertical intersection between the mounting groove 13 and the limiting groove. This design can ensure that the limiting protrusion 311 will not be misoperated during the installation of the electrode needle 3, ensuring smooth and accurate installation.

[0048] In some embodiments, Figure 2 As shown, the end of the electrode disk portion 31 facing the elastic member 2 has a countersunk structure 312 for docking the elastic member 2. The main function of the countersunk structure 312 is to provide a stable installation position for the elastic member 2 (such as a spring). By docking the end of the spring into the countersunk hole of the electrode disk portion 31, it can be ensured that the spring will not deviate or move irregularly during operation, thereby maintaining the normal function of the electrode needle 3. Docking the spring with the countersunk structure 312 can effectively prevent the spring from deviating, twisting or deforming due to external forces during use, thereby extending the service life of the spring and improving the stability and working efficiency of the electrode disk portion. The design of the countersunk structure 312 also makes the installation and disassembly of the spring easier. During the installation process, the spring can be placed directly in the countersunk hole without the need for additional positioning operations.

[0049] In some embodiments, Figure 2As shown, the electrode disk portion 31 of the electrode needle 3 includes a main body section 313 and a transition section 314 that are coaxially arranged. The diameter of the main body section 313 is larger than the diameter of the transition section 314, and the limiting protrusion 311 is provided on the outer peripheral wall of the main body section 313. The inner diameter of the opening at the first end of the sleeve 1 is larger than the outer diameter of the transition section 314 and smaller than the outer diameter of the main body section 313. This design can ensure that during the telescopic process of the electrode needle 3, the main body section 313 is always stably supported within the sleeve 1, while the transition section 314 provides a smooth transition space for the telescopic movement of the electrode needle 3. Through reasonable dimensional design (the clever cooperation of the main body section 313 being larger than the transition section 314, the limiting protrusion 311, and the inner diameter of the opening of the sleeve 1), the stability and accuracy of the electrode needle 3 during the telescopic process are effectively ensured, avoiding instability caused by structural mismatch or excessive telescopic movement.

[0050] In some embodiments, as Figure 2 shown, there is an annular gap between the main body section 313 of the electrode disk portion and the inner wall of the sleeve 1, and there is also an annular gap between the transition section 314 and the inner wall of the opening at the first end of the sleeve 1, such that the electrode disk portion can swing relative to the sleeve 1 within a set angular range (such as 0 - 3°). Due to the existence of the annular gap between the electrode disk portion and the sleeve 1, the electrode disk portion can swing relative to the sleeve 1 within the set angular range. This kind of swing can enable the electrode disk portion to adjust the angle as needed during operation (such as adapting to the irregular curved surface or minor errors of the test subject's head shape), thereby optimizing the working efficiency or adapting to different operating conditions. This design can ensure that the electrode disk portion will not be overly restricted during the movement process while maintaining a certain degree of stability. This design greatly optimizes the overall performance and applicability of the electrode needle 3.

[0051] Second, the present invention provides an electroencephalogram signal acquisition device (the first electroencephalogram signal acquisition device 100), as Figure 5As shown, the first EEG signal acquisition device 100 includes a cap body 110 and at least one of the aforementioned EEG signal acquisition sensors; the cap body 110 is made of soft material, and has electrode holes for installing the EEG signal acquisition sensors at set positions; the design positions of these electrode holes are reserved specifically for installing EEG signal acquisition sensors. The positions and number of electrode holes can be designed according to actual needs to ensure that EEG signals can be accurately acquired. The cap body 110 is made of soft material, has softness, is easy to wear and comfortable. The selection of soft materials can ensure that it does not cause discomfort when worn for a long time, and also helps to adapt to the shapes of different head shapes. The middle part of the sleeve 1 has a clamping structure 14, which is used to clamp the EEG signal acquisition sensor to the electrode hole position of the cap body 110. Through the clamping structure 14, the EEG signal acquisition sensor can be stably maintained in the correct position, ensuring that it will not loosen or move during use, thereby ensuring the stability and accuracy of signal acquisition. The design of the clamping structure 14 allows the EEG signal acquisition sensor to be easily positioned during installation, and is also convenient for disassembly or replacement, with high operational convenience.

[0052] In some embodiments, Figure 4 As shown, the clamping structure 14 includes two convex ring structures 141 arranged opposite to each other, and the two convex ring structures 141 are spaced apart along the axial direction to form a clamping groove 142 for clamping the cap body 110 at the periphery of its electrode hole. The design of the convex ring helps to provide stable physical contact and clamping force, thereby ensuring that the EEG signal acquisition sensor is firmly fixed in the electrode hole of the cap body 110. The shape and spacing of the clamping groove 142 are precisely designed to ensure that the EEG signal acquisition sensor can be firmly clamped during installation to prevent loosening or displacement during use. The EEG signal acquisition sensor can be firmly fixed on the cap body 110 through the interaction between the convex ring and the clamping groove 142 structure, thereby ensuring that the EEG signal acquisition sensor always remains in the correct position during the EEG signal acquisition process and provides a stable signal.

[0053] In some embodiments, Figure 4 and Figure 5 As shown, the EEG signal acquisition sensor further includes a bottom cover 120, which is used to be installed at the second end of the sleeve 1, so that the fixing member abuts against the end of the elastic member 2 away from the electrode needle 3. The bottom cover 120 and the annular protrusion 15 of the sleeve 1 can be connected by threads, or by a clamping method, or screw connection, bonding, etc.

[0054] Furthermore, the bottom cover 120 is provided with a wire hole for passing the signal wire 4 for transmitting the electrode signal. Through this wire hole, the electrode wire can be safely and stably connected to the EEG signal acquisition sensor, thereby achieving effective signal transmission and ensuring that the transmission of the EEG signal is not interfered with.

[0055] In a third aspect, as Figure 6 and 7 shown, the present invention provides an electroencephalogram (EEG) signal acquisition device (the second EEG signal acquisition device 200), which includes a head ring body 210 and at least one of the aforementioned EEG signal acquisition sensors; the head ring body 210 is made of a rigid material and has electrode holes for installing the EEG signal acquisition sensors at set positions; the second end of the sleeve 1 is open, such that the end of the elastic member 2 directly abuts against the inner wall position of the head ring body 210.

[0056] In some embodiments, the second EEG signal acquisition device 200 further includes an end cap 220, which is used to install the EEG signal acquisition sensor at the electrode hole position of the head ring body 210. Through the design of the end cap 220, it can be ensured that the EEG signal acquisition sensor remains stable during use and avoid loosening or displacement during wearing. The second end of the sleeve 1 is formed with an annular protrusion 15, and the end cap 220 presses against the side surface of the annular protrusion 15 or presses against the end surface of the first end of the sleeve 1, and the end cap 220 is clamped, magnetically attracted or connected using fasteners to the electrode hole.

[0057] In a fourth aspect, the present invention further provides a signal acquisition device, as Figure 8 shown, the signal acquisition device includes: an integrated device 5 and an EEG device, the integrated device 5 includes a connection interface 51, a plurality of EEG detection points 52 and a plurality of human body detection points 53, the connection interface 51 is used to connect the EEG device, and the EEG device includes the aforementioned EEG signal acquisition device (such as the first EEG signal acquisition device 100 or the second EEG signal acquisition device 200). In this embodiment, the signal acquisition device can be used to detect EEG signals and human physiological signals. The EEG detection points 52 and the human body detection points 53 are integrated in the integrated device 51. As an alternative solution, both the EEG detection points 52 and the human body detection points 53 can be hole positions. When signal detection is required, the above hole positions can be connected to corresponding detection electrodes or sensors.

[0058] The number of human body detection points 53 can be set according to actual needs. For example, the number of human body detection points 53 can be M. If n human physiological signals need to be detected, then n human body detection points 53 can be connected to corresponding detection electrodes. At this time, the number of human body detection points 53 in the access state is n, that is, n out of M human body detection points 53 are in the access state. Both M and n are positive integers and M is greater than or equal to n. As Figure 8 shown, for example, M = 8.

[0059] In the embodiments of the present invention, the total number of signal channels detected by the signal acquisition device is N, that is, the total number of detected signals is N, and the number of channels of the detected electroencephalogram (EEG) signals is N - n, where N is a positive integer and N is greater than n. For example, when N = 32 and n = 8, then N - n = 24.

[0060] In the embodiments of the present invention, n human body detection points 53 are used to detect n-channel human physiological signals when in the access state; the EEG device is used to detect (N - n)-channel EEG signals when connected to the integration device 5 through the connection interface 51; or, (N - n) EEG detection points 52 are used to detect (N - n)-channel EEG signals when the EEG device is not connected to the integration device 5 through the connection interface 51.

[0061] In the embodiments of the present invention, when using the EEG device to collect EEG signals, the user can directly wear the EEG device to complete the collection, so that the user can conveniently collect EEG signals; when using the EEG detection points to collect EEG signals, the user can select the required EEG detection points by himself, thus meeting the diverse user needs. Through the synchronous acquisition method provided by the embodiments of the present invention, the above-mentioned EEG device and EEG detection points can be extended for synchronous acquisition of human physiological signals. When collecting EEG signals, human physiological signals can also be collected using the human body detection points, without the need to upgrade the firmware of the original EEG device, improving the flexibility of EEG signal collection, and realizing synchronous acquisition of multi-modal signals such as EEG signals and human physiological signals. These signals based on synchronous acquisition are convenient for predicting and analyzing human physiological / psychological / mental / health and other states.

[0062] In some embodiments, the signal acquisition device further includes a control circuit; as Figure 9 shown, the control circuit includes: an analog integrated front end and N signal channel branches connected to the analog integrated front end. The N signal channel branches include M integrated signal channel branches and (N - M) EEG signal channel branches, where both M and N are positive integers and N is greater than M.

[0063] The integrated signal channel branches are used to select the positive human physiological signals and the corresponding negative human physiological signals detected by the human body detection points, the positive EEG signals and the corresponding negative EEG signals detected by the EEG device, or the positive EEG signals and the corresponding negative EEG signals detected by the EEG device. The EEG signal channel branches are used to select the positive EEG signals and the corresponding negative EEG signals detected by the EEG device or the positive EEG signals and the corresponding negative EEG signals detected by the EEG device. The analog integrated front end is used to calculate n human physiological signals based on the selected n positive human physiological signals and the corresponding negative human physiological signals, and calculate (N - n) EEG signals based on the (N - n) positive EEG signals and the corresponding negative EEG signals, where n is a positive integer and N is greater than n.

[0064] As an alternative, the integrated signal channel branch includes a first integrated signal channel branch and a second integrated signal channel branch, and the EEG signal channel branch includes a first EEG signal channel branch and a second EEG signal channel branch. The first integrated signal channel branch is used to select and pass the positive human physiological signal detected at the human detection point, the positive EEG signal detected by the EEG device, or the positive EEG signal detected at the EEG detection point. The second integrated signal channel branch is used to select and pass the negative human physiological signal detected at the human detection point, the negative EEG signal detected by the EEG device, or the negative EEG signal detected at the EEG detection point. The first EEG signal channel branch is used to select and pass the positive EEG signal detected by the EEG device or the positive EEG signal detected at the EEG detection point. The second EEG signal channel branch is used to select and pass the negative EEG signal detected by the EEG device or the negative EEG signal detected at the EEG detection point.

[0065] As Figure 9 shown, the EEG device includes a plurality of EEG detection electrodes, and the human detection points include a first human detection point and a second human detection point.

[0066] The first integrated signal channel branch includes a first switch K1 and a second switch K2. The first input terminal of the first switch K1 is connected to the corresponding EEG detection point 1+, the second input terminal of the first switch K1 is connected to the corresponding EEG detection electrode 1+, the output terminal of the first switch K1 is connected to the first input terminal of the second switch K2, the control terminal of the first switch K1 is connected to the connection interface, the second input terminal of the second switch K2 is connected to the corresponding first human detection point 1+, the output terminal of the second switch K2 is connected to the analog integrated front end, and the control terminal of the second switch K2 is connected to the corresponding human detection point 1.

[0067] The second integrated signal channel branch includes a third switch K3 and a fourth switch K4. The first input terminal of the third switch K3 is connected to the corresponding EEG detection point 1-, the second input terminal of the third switch K3 is connected to the corresponding EEG detection electrode 1-, the output terminal of the third switch K3 is connected to the first input terminal of the fourth switch K4, the control terminal of the third switch K3 is connected to the connection interface, the second input terminal of the fourth switch K4 is connected to the corresponding second human detection point 1-, the output terminal of the fourth switch K4 is connected to the analog integrated front end, and the control terminal of the fourth switch K4 is connected to the corresponding human detection point 1.

[0068] In the present invention, the features described and / or illustrated for one embodiment can be used in the same or similar manner in one or more other embodiments, and / or combined with the features of other embodiments or replace the features of other embodiments.

[0069] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the embodiments of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electroencephalogram signal acquisition sensor, characterized in that, It includes: A sleeve, an elastic member installed in the sleeve, and an electrode needle for collecting brain electrical signals in a state of contact with a human head; The electrode needle comprises an electrode disk portion and a plurality of needle bodies arranged on one side of the electrode disk portion; The first end of the sleeve has an opening and a limiting rib, so that the needle body of the electrode needle extends from the end, and the electrode disk portion can be stuck at the position of the limiting rib to prevent it from falling out of the first end of the sleeve; The first end of the elastic member abuts against the side of the electrode disk portion away from the needle body, and the other end is used to abut against a fixing member, so that the needle body of the electrode needle can automatically adjust the telescopic length based on the head circumference of the subject; At least one limiting protrusion is provided on the outer peripheral surface of the electrode disk portion, and the wall portion of the sleeve has a corresponding guide groove, which extends along the generatrix direction of the sleeve. The limiting protrusion is inserted into the guide groove so that the electrode needle can be extended and retracted within the allowable length range of the guide groove.

2. The electroencephalogram signal acquisition sensor according to claim 1, characterized in that The wall portion of the sleeve also has a mounting groove connected to the guide groove, one end of the mounting groove extends to the middle of the guide groove, and the other end extends to the end of the sleeve away from the electrode needle.

3. The electroencephalogram signal acquisition sensor according to claim 1, characterized in that, One end of the electrode disk portion facing the elastic member has a countersunk hole structure for docking with the elastic member.

4. The electroencephalogram signal acquisition sensor according to claim 1, wherein The electrode disk portion of the electrode needle comprises a main body section and a transition section which are coaxially arranged, the diameter of the main body section is larger than the diameter of the transition section, and the limiting protrusion is arranged on the outer peripheral wall of the main body section; The inner diameter of the opening of the first end of the sleeve is larger than the outer diameter of the transition section and smaller than the outer diameter of the main body section.

5. The electroencephalogram signal acquisition sensor according to claim 4, wherein There is an annular gap between the main section of the electrode disk and the inner wall of the sleeve, and there is also an annular gap between the transition section and the inner wall of the first end opening of the sleeve, so that the electrode disk can swing within a set angle range relative to the sleeve.

6. An electroencephalogram signal acquisition device, characterized in that, The EEG signal acquisition device comprises a cap body and at least one EEG signal acquisition sensor as described in any one of claims 1 to 5; The cap body is made of soft material, and has an electrode hole at a set position for installing the EEG signal acquisition sensor; The middle part of the sleeve has a clamping structure for clamping the EEG signal acquisition sensor at the electrode hole position of the cap body.

7. The electroencephalogram signal acquisition device according to claim 6, characterized in that, The clamping structure comprises two convex ring structures arranged opposite to each other, and the two convex ring structures are spaced apart in the axial direction to form a clamping groove for clamping the cap body at the periphery of the electrode hole.

8. The electroencephalogram signal acquisition device according to claim 6, wherein The EEG signal acquisition sensor further comprises a bottom cover, which is used to be mounted on the second end of the sleeve so that the fixing member abuts against the end of the elastic member away from the electrode needle; The bottom cover is provided with a wire hole for passing a signal wire that transmits an electrode signal.

9. An electroencephalogram signal acquisition device, characterized in that, The EEG signal acquisition device comprises a head ring and at least one EEG signal acquisition sensor as described in any one of claims 1 to 5; The head ring body is made of hard material, and has electrode holes at set positions for installing the EEG signal acquisition sensor; The second end of the sleeve is open, so that the end of the elastic member directly abuts against the inner wall of the head ring body.

10. The electroencephalogram signal acquisition device according to claim 8, wherein The electroencephalogram (EEG) signal acquisition device further includes an end cap, which is used to mount the EEG signal acquisition sensor at the electrode hole position of the head ring body; A circular protrusion is formed at the second end of the sleeve. The end cap presses against the side surface of the circular protrusion or presses against the end surface of the first end of the sleeve. The end cap is clamped, magnetically attracted, or connected using fasteners to the electrode hole.

11. A signal acquisition device, characterized in that, It includes: An integrated device and an EEG device. The integrated device includes a connection interface, multiple EEG detection points, and multiple human body detection points. The connection interface is used to connect the EEG device, and the EEG device includes the EEG signal acquisition device according to any one of claims 6-10; When in the access state, n of the human body detection points are used to detect n-channel human physiological signals; When the EEG device is connected to the integrated device through the connection interface, it is used to detect N-n channel EEG signals; or, when the EEG device is not connected to the integrated device through the connection interface, N-n of the EEG detection points are used to detect N-n channel EEG signals; Both N and n are positive integers, and N is greater than n.

12. The signal acquisition device according to claim 11, wherein, When the EEG device is connected to the integrated device through the connection interface and the human body detection points are not in the access state, it is used to detect N-channel EEG signals; or, when the EEG device is not connected to the integrated device and the human body detection points are not in the access state, N of the EEG detection points are used to detect N-channel EEG signals.

13. The signal acquisition device according to claim 11 or 12, characterized in that, It further includes a control circuit; the control circuit includes: an analog integrated front end and N signal channel branches connected to the analog integrated front end. The N signal channel branches include M integrated signal channel branches and N-M EEG signal channel branches. Both M and N are positive integers and N is greater than M; The integrated signal channel branches are used to select the positive human physiological signals and the corresponding negative human physiological signals detected by the human body detection points, the positive EEG signals and the corresponding negative EEG signals detected by the EEG device, or the positive EEG signals and the corresponding negative EEG signals detected by the EEG device; The EEG signal channel branches are used to select the positive EEG signals and the corresponding negative EEG signals detected by the EEG device or the positive EEG signals and the corresponding negative EEG signals detected by the EEG device; The analog integrated front end is used to calculate n human physiological signals based on the selected n positive human physiological signals and the corresponding negative human physiological signals, and calculate N-n EEG signals based on the N-n positive EEG signals and the corresponding negative EEG signals. n is a positive integer, and N is greater than n.

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