Portable electroencephalogram signal acquisition device
Patent Information
- Application Number
- CN202510316040.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2025-07-11
Smart Images
Figure CN120284284A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of electroencephalogram signal acquisition devices, and particularly to a portable electroencephalogram signal acquisition device. Background Art
[0002] Most of the existing portable electroencephalogram signal acquisition devices usually adopt a ring structure. This design is based on a fixed size and is applicable to users within a majority of head circumference ranges. However, the ring structure has some limitations in practical applications. Especially for users with a relatively small or large head circumference, its applicability is poor. The ring structure design is generally based on the common adult head circumference range (such as 560 - 580 mm). However, for users with a relatively small head circumference (such as children or some women), the existing devices often cannot be effectively adapted. Due to the fixed design, the ring structure cannot be flexibly adjusted according to the user's head circumference, resulting in an improper fit when worn. For users with a small head circumference, the head ring may be too loose to fit tightly on the head, affecting the stability of the sensor and the signal quality. On the contrary, for a larger head circumference, the ring structure may be too tight, causing discomfort when worn or even unable to be worn.
[0003] The accuracy and stability of electroencephalogram signal acquisition are directly related to the contact quality between the electrodes and the scalp. The fixed-size ring structure may cause poor contact of the electrodes in some areas, thereby affecting the quality of the electroencephalogram signal. In users with a relatively small or large head circumference, the contact pressure and stability of the device will be affected, resulting in unstable signals or increased noise, reducing the acquisition effect. Summary of the Invention
[0004] In view of this, the embodiments of the present invention provide a portable electroencephalogram signal acquisition device to eliminate or improve one or more defects existing in the prior art.
[0005] One aspect of an embodiment of the present invention provides a portable electroencephalogram (EEG) signal acquisition device, which includes an annular main body and a plurality of EEG signal acquisition sensing components mounted on the annular main body; the annular main body includes a front half-ring and a rear half-ring, one of the front half-ring and the rear half-ring is provided with a plug-in strip, and the other half-ring is provided with a plug-in slot, and the plug-in strip extends into the plug-in slot; the plug-in strip structure includes a plurality of first tooth structures arranged in an array along its length direction, and a control component is arranged in the plug-in slot of the other half-ring structure; the control component includes an operating member, an elastic member and a connecting rod; wherein, the operating member is connected to the first end of the connecting rod through the elastic member, the middle part of the connecting rod is rotatably connected to its half-ring structure, and a second tooth structure is formed at the second end of the connecting rod; the operating member is used to press the connecting rod so that the second tooth is combined with or separated from the first tooth; in a state where the second tooth is combined with the first tooth, the second tooth structure is inserted between two adjacent first tooth structures to realize the fixation of the front half-ring and the rear half-ring; in a state where the second tooth is separated from the first tooth, the front half-ring and the rear half-ring can move relatively along the length direction of the plug-in strip.
[0006] In some embodiments, the first teeth and the second teeth have inclined surfaces facing each other and parallel to each other.
[0007] In some embodiments, the operating member has a button structure protruding from the outer surface of the half-ring structure, and is integrally formed with or fixedly connected to the connecting rod; an elastic member bracket is fixedly arranged at a position corresponding to the operating member in the half-ring structure, and both ends of the elastic member respectively abut against the inner wall of the operating member and the elastic member bracket, so that the operating member and the connecting rod return to their original states.
[0008] In some embodiments, a limiting structure is formed between the operating member and the elastic member bracket to prevent the second end of the connecting rod from swinging excessively.
[0009] In some embodiments, the EEG signal acquisition sensing components include a forehead sensing component mounted on the front half-ring and a posterior brain sensing component mounted on the rear half-ring, the forehead sensing component includes at least one EEG signal acquisition sensor, and the posterior brain sensing component includes at least one EEG signal acquisition sensor; all the EEG signal acquisition sensors in the forehead sensing component and the posterior brain sensing component are connected through an FPC cable, and the FPC cable is arranged in the housing of the annular main body.
[0010] In some embodiments, the FPC cable is provided with a folding portion at positions corresponding to the plug-in slot and the plug-in strip, which is used as a telescopic margin corresponding to the length change of the front half-ring and the rear half-ring.
[0011] In some embodiments, the electrode further includes a GND electrode mounted on the front half ring, and the GND electrode is also connected to the FPC cable.
[0012] In some embodiments, the portable EEG signal acquisition device also includes an amplifier module, which is installed in the middle position of the rear half ring; the portable EEG signal acquisition device also includes a mainboard installed inside the amplifier module, and the FPC cable has an amplifier terminal extending into the amplifier module for connecting to the mainboard.
[0013] In some embodiments, the shell of the annular body is a silicone shell; the portable EEG signal acquisition device also includes a reference electrode led out from the annular body by a wire.
[0014] In some embodiments, the electrode adopts an EEG signal acquisition sensor with a retractable length or an EEG signal acquisition sensor with replaceable lengths.
[0015] In some embodiments, a telescopic sensing assembly includes: a sleeve and an elastic member installed in the sleeve and an electrode needle for collecting EEG signals in contact with a human head; the electrode needle includes 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 this end, and the electrode disk portion can be stuck in the position of the limiting rib to prevent it from escaping from 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 circumference of the subject's head; 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, the guide groove extends along the generatrix direction of the sleeve, and the limiting protrusion is stuck in the guide groove, so that the electrode needle can be telescopic within the allowable length range of the guide groove.
[0016] In some embodiments, the electrode disk portion of the electrode needle includes a coaxially arranged main body section and a transition section, 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.
[0017] In some embodiments, 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.
[0018] Another aspect of the embodiment of the present invention provides a signal acquisition device, including: an integrated device and an electroencephalogram (EEG) device. The integrated device includes a connection interface, a plurality of EEG detection points, and a plurality of human body detection points. The connection interface is used to connect the EEG device, and the EEG device includes the portable EEG signal acquisition device as described above. When in an 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, the EEG device is used to detect (N - n)-channel EEG signals; alternatively, 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.
[0019] In some embodiments, when the EEG device is connected to the integrated device through the connection interface and the human body detection points are not in an access state, the EEG device is used to detect N-channel EEG signals; alternatively, when the EEG device is not connected to the integrated device and the human body detection points are not in an access state, N of the EEG detection points are used to detect N-channel EEG signals.
[0020] 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 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.
[0021] Through the design of the plug-in strip, plug-in slot, tooth structure, and control component, the portable EEG signal acquisition device in the embodiment of the present invention provides good adjustability and can adapt to users with different head circumferences. Combining a flexible adjustment mechanism and a stable fixing method, this design solves the deficiencies of existing EEG devices in adapting to different head shapes or head circumferences, and improves the wearing comfort and signal acquisition stability.
[0022] Additional advantages, objects, and features of the present invention will be partly set forth in the description which follows, and will partly become apparent to those of ordinary skill in the art upon examination of the following, or may be learned by practice of the present invention. The objects and other advantages of the present invention may be realized and attained by the structure particularly pointed out in the specification and the drawings.
[0023] Those skilled in the art will understand that the objects and advantages that can be achieved with the present invention are not limited to those specifically described above, and the above and other objects that the present invention can achieve will be more clearly understood from the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The drawings described herein are for 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.
[0025] Figure 1 It is a schematic three-dimensional structure diagram of the portable electroencephalogram signal acquisition device in an embodiment of the present invention before elongation.
[0026] Figure 2 It is a schematic three-dimensional structure diagram of the portable electroencephalogram signal acquisition device in an embodiment of the present invention after elongation.
[0027] Figure 3 It is a partial sectional view of the portable electroencephalogram signal acquisition device in an embodiment of the present invention at the plug-in strip and plug-in slot parts.
[0028] Figure 4 It is a schematic structure diagram of an FPC flexible cable in an embodiment of the present invention.
[0029] Figure 5 It is a schematic structure diagram of an FPC flexible cable and an amplifier module in an embodiment of the present invention.
[0030] Figure 6 It is a schematic structure diagram of the portable electroencephalogram signal acquisition device in another embodiment of the present invention.
[0031] Figure 7 It is a schematic structure diagram of a length-retractable sensing component in an embodiment of the present invention.
[0032] Figure 8 It is a schematic structure diagram of an elastic member and electrode needles of a length-retractable sensing component in an embodiment of the present invention.
[0033] Figure 9Schematic diagram of the structure of the signal acquisition device in an embodiment of the present invention.
[0034] Figure 10 Schematic circuit diagram of the signal acquisition device in an embodiment of the present invention.
[0035] Reference numerals: 1. Front half-ring; 2. Rear half-ring; 11. Insertion strip; 111. First tooth; 12. Insertion slot; 131. Operating member; 132. Elastic member; 133. Link; 134. Elastic member bracket; 135. Rotating shaft; 136. Second tooth; 31. EEG signal acquisition sensor; 32. GND electrode; 33. Reference electrode; 4. FPC cable; 41. Folding part; 42. Amplifier connection terminal; 5. Amplifier module.
[0036] 311. Sleeve; 3111. Guide groove; 312. Elastic member; 313. Electrode needle; 3131. Electrode disc part; 3132. Needle body; 3133. Limit protrusion; 3131a. Main body section; 3131b. Transition section.
[0037] 6. Integrated device; 61. Connection interface; 62. EEG detection point; 63. Human body detection point. Detailed implementation manners
[0038] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the implementation manners and the drawings. Herein, the illustrative implementation manners of the present invention and their descriptions are used to explain the present invention, but do not limit the present invention.
[0039] Herein, it should also be noted that in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present invention are shown in the drawings, while other details less related to the present invention are omitted.
[0040] It should be emphasized that the term "including / comprising" 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.
[0041] Herein, it should also be noted that if not otherwise specified, the term "connection" in this article can not only refer to direct connection, but also represent indirect connection with an intermediate.
[0042] In the following, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same reference numerals represent the same or similar components, or the same or similar steps.
[0043] In order to overcome the problem of poor applicability of the fixed annular structure of existing EEG devices, the present invention adopts a horizontally telescopic structural design. Through the adjustable telescopic function, the head ring can adapt to head circumferences of different sizes, ensuring that each user can wear it comfortably and obtain stable signal acquisition. This design can be precisely adjusted according to the user's head shape and head circumference, avoiding the limitations brought by fixed sizes, and at the same time improving the wearing comfort and the acquisition quality of EEG signals.
[0044] In some embodiments, as Figures 1 - 3 shown, a portable EEG signal acquisition device includes an annular main body and a plurality of EEG signal acquisition sensing components mounted on the annular main body; the annular main body includes a front half-ring 1 and a rear half-ring 2; the split front half-ring 1 and rear half-ring 2 facilitate the arrangement of the telescopic structure.
[0045] Further, one of the half-ring structures of the front half-ring 1 and the rear half-ring 2 is provided with a plug-in strip 11, and the other half-ring structure is provided with a plug-in groove 12. The plug-in strip 11 extends into the plug-in groove 12, that is, the front half-ring 1 and the rear half-ring 2 can move along the length direction of the plug-in strip 11 or the plug-in groove 12, that is, the telescopic function is realized.
[0046] Correspondingly, the portable EEG signal acquisition device is configured with corresponding unlocking and locking mechanisms to achieve stable and reliable connection or state conversion. Optionally, the plug-in strip 11 structure includes a plurality of first tooth structures 111 arranged in an array along its length direction, and a control component is provided in the plug-in groove 12 of the other half-ring structure; the control component includes an operating member 131, an elastic member 132 and a connecting rod 133. Among them, the operating member 131 is connected to the first end of the connecting rod 133 through the elastic member 132, the middle of the connecting rod 133 is rotatably connected to its half-ring structure, such as through a rotating shaft 135, and a second tooth structure 136 is formed at the second end of the connecting rod 133.
[0047] The operating member 131 is used to press the connecting rod 133 so that the second tooth 136 is combined with or separated from the first tooth 111; in the state where the second tooth 136 is combined with the first tooth 111, the second tooth structure 136 is inserted between two adjacent first tooth structures 111 to fix the front half-ring 1 and the rear half-ring 2; in the state where the second tooth 136 is separated from the first tooth 111, the front half-ring 1 and the rear half-ring 2 can move relative to each other along the length direction of the plug-in strip 11.
[0048] In the above embodiments, through the extrusion of the elastic member 132 on the connecting rod 133, the second engaging tooth 136 is inserted between the structures of adjacent first engaging teeth 111, thereby fixing the front half-ring 1 and the rear half-ring 2 together. At this time, there is no relative movement between the front half-ring 1 and the rear half-ring 2, and the entire annular structure will form a fixed whole, ensuring the stability of the electroencephalogram signal acquisition and sensing assembly during wearing. When the operating member 131 is pressed, the elastic member 132 will cause the connecting rod 133 to move, so that the second engaging tooth 136 is separated from the first engaging tooth 111. In this state, the front half-ring 1 and the rear half-ring 2 can slide freely along the length direction of the insertion strip 11, thereby changing the size of the annular structure to adapt to users with different head circumferences. The setting of the elastic member 132 enables the operating member 131 to quickly return to its original position, ensuring the stable combination of the engaging tooth structure and preventing the annular main body from loosening or falling off during wearing. Optionally, the operating member 131 can be arranged at the bottom of the half-ring structure to enhance the overall aesthetics; the elastic member 132 can be selected as a spring or the like.
[0049] In the above embodiments, through the telescopic design of the insertion strip 11 and the insertion slot 12, the front half-ring 1 and the rear half-ring 2 can be freely adjusted according to the user's head circumference, ensuring that the electroencephalogram signal acquisition device adapts to different head shapes and avoiding the limitation of the fixed head circumference of traditional devices. By operating the operating member 131, the elastic member 132 and the connecting rod 133 in the control assembly, the user can easily adjust the size of the device without additional tools. The engaging tooth combination method ensures the fixation of the device during wearing and avoids unstable signal acquisition caused by head movement. The length-adjustable design not only improves the wearing comfort but also enhances the stability and comfort during long-term wearing.
[0050] Compared with the wearable head circumference applicable size of the electroencephalogram signal acquisition device in the prior art, which is generally 560 - 580 mm, the body wearing size of the portable electroencephalogram signal acquisition device in the embodiment of the present invention can be worn by testers within the head circumference size range of 520 - 600 mm, greatly improving the applicable range; combined with the retractable or replaceable dry electrodes (electroencephalogram signal acquisition and sensing assembly), the applicable scenarios for different head circumferences and head shapes are further increased.
[0051] In some embodiments, such as Figure 3As shown, the first cogs 111 and the second cogs 136 have inclined surfaces facing each other and parallel to each other, so that the combination and separation of the two can be smoother. When the second cogs 136 enter between the two first cogs 111, the inclined surface structure will ensure that the cogs can be smoothly docked, avoiding jamming. Optionally, the first cogs 111 and the second cogs 136 adopt a triangular structure (the tip part can be rounded), especially a right triangle. This shape not only ensures the tight fit between the cogs, but also provides a strong locking effect. The triangular structure helps to disperse the pressure on the contact surface, so that the device is not easily loosened when subjected to external forces. The spacing between the two first cogs 111 perfectly fits the shape of the second cogs 136, ensuring the perfect fit between the cogs. When the second cogs 136 are inserted between the first cogs 111, the position can be accurately locked, which not only ensures the firmness of the connection, but also enables the easy insertion and detachment of the cogs during operation.
[0052] The inclined surface design can achieve smooth combination and separation between the cogs, thus avoiding jamming or unevenness during operation. This makes it more convenient for users to adjust the size of the device, and the operation experience is smoother. The inclined surfaces and shape designs of the first cogs 111 and the second cogs 136 enable them to better adapt to the needs of the device under different usage conditions. Whether adjusting the size of the device or frequently opening and closing during use, it can maintain good adaptability, ensuring comfort and stability. The right triangle cog structure can provide a strong physical locking effect, and the precise fit between the cogs further enhances the stability of the device, avoiding loosening or falling off of the annular body due to head movement or external forces.
[0053] In some embodiments, as Figures 1 - 3 shown, the operating member 131 is in the form of a button structure protruding from the outer surface of the semi-ring structure, integrally formed with or fixedly connected to the connecting rod 133, so as to avoid loosening or falling off between the operating member 131 and the connecting rod 133, and improve the overall stability and durability. The operating member 131 is designed as a button structure protruding from the outer surface of the semi-ring structure. This design makes the operating member 131 easy to trigger, and users can conveniently press it, ensuring good operability and comfort during use. Optionally, the operating member 131 is arranged at the docking parts on both sides of the semi-ring structure.
[0054] Furthermore, as Figure 3As shown, an elastic member support 134 is fixedly provided at a position corresponding to the operating member 131 within the semi-circular structure. This support provides a support point for fixing the elastic member 132 and ensures that the elastic member 132 can work properly. Both ends of the elastic member 132 respectively abut against the inner wall of the operating member 131 and the elastic member support 134, causing the operating member 131 and the connecting rod 133 to return to their original states. The elastic member 132 plays a role in returning to the original position. After the operating member 131 is pressed, the elastic member 132 will provide sufficient force to push it back to the original position, maintaining the connection stability of the semi-circular structure and the coherence of the function.
[0055] Further, as Figure 3 shown, a limiting structure is formed between the operating member 131 and the elastic member support 134 (for example, the stepped structure at the bottom of the operating member 131 can be stuck on the elastic member support 134), which is used to prevent the second end of the connecting rod 133 from swinging excessively, avoiding structural instability caused by excessive movement, and ensuring continuous stability during long-term use. By controlling the swing amplitude of the connecting rod 133, the limiting structure helps to improve the operation accuracy, enabling each pressing operation to accurately return to the predetermined position and reducing the occurrence of misoperations or inaccuracies.
[0056] In some embodiments, as Figure 4 and Figure 5 shown, the electroencephalogram signal acquisition and sensing assembly includes a forehead sensing assembly mounted on the front semi-ring 1 and a posterior brain sensing assembly mounted on the rear semi-ring 2. The forehead sensing assembly includes at least one electroencephalogram signal acquisition sensor 31, and the posterior brain sensing assembly includes at least one electroencephalogram signal acquisition sensor 31. Figure 5 In the shown embodiment, the forehead sensing assembly includes four electroencephalogram signal acquisition sensors 31, and the posterior brain sensing assembly includes four electroencephalogram signal acquisition sensors 31, forming an eight-channel electrode. All electroencephalogram signal acquisition sensors 31 can closely adhere to the corresponding positions on the head to meet the signal test requirements.
[0057] Further, all electroencephalogram signal acquisition sensors 31 in the forehead sensing assembly and the posterior brain sensing assembly are connected by an FPC cable 4. The FPC cable 4 (flexible printed circuit) is arranged within the housing of the annular main body. The FPC cable 4 is a flexible circuit connection method with good bendability and adaptability, suitable for installation within a curved surface or annular structure. The FPC cable 4 is cleverly arranged within the housing of the annular main body, which can effectively protect the cable and prevent damage to the cable from the external environment. The housing design may have a certain protective effect, increasing the durability and stability of the overall device. Due to its flexibility and high durability, the FPC cable 4 can maintain a stable electrical connection during head movement and long-term wearing, reducing the breakage or damage of the wire.
[0058] In some embodiments, as Figures 3 - 5 shown, the FPC flexible cable 4 is provided with a folding portion 41 at positions corresponding to the insertion slot 12 and the insertion strip 11, serving as the telescopic margin corresponding to the length change of the front half-ring 1 and the rear half-ring 2. The design of the FPC flexible cable 4 takes into account the dynamic adaptability and structural stability of the annular device. By providing the folding portion 41 at a specific position, it helps the FPC flexible cable 4 to maintain flexibility during the structural adjustment of the annular device and can effectively cope with the dimensional changes of the annular device caused by different head shapes of the wearer.
[0059] In some embodiments, as Figure 4 and Figure 5 shown, the electroencephalogram signal acquisition sensing assembly further includes a GND electrode 32 mounted on the front half-ring 1, and the GND electrode 32 is also connected to the FPC flexible cable 4. The GND electrode 32 can provide a stable electrical ground point, which helps to ensure the electrical isolation between the circuit system of the device and the external environment. This can reduce electromagnetic interference (EMI) and improve the signal stability of the device. The GND electrode 32 can effectively reduce the noise caused by external interference or internal signal reflection and ensure the accurate transmission of the signal. Optionally, the GND electrode 32 is located at the middle position of the front forehead sensing assembly.
[0060] In some embodiments, as Figure 1 、 Figure 2 、 Figure 5 and Figure 6 shown, the portable electroencephalogram signal acquisition device further includes an amplifier module 5, and the amplifier module 5 is mounted at the middle position of the rear half-ring 2. The main function of this module is to amplify the acquired electroencephalogram signal because the electroencephalogram signal is usually relatively weak, and the directly acquired signal strength is not sufficient for subsequent processing. The amplifier module 5 ensures that the signal can be effectively recognized and utilized by the subsequent processing circuit by enhancing the signal strength. Selecting to mount the amplifier module 5 at the middle position of the rear half-ring 2 helps to optimize the spatial layout and ensure that the signal transmission path is minimized, reducing signal loss.
[0061] Furthermore, the portable electroencephalogram (EEG) signal acquisition device further includes a main board installed inside the amplifier module 5. The FPC cable 4 has an amplifier connection terminal 42 extending into the amplifier module 5 for connecting to the main board. The main board is installed inside the amplifier module 5 and undertakes the main signal processing, calculation, and control functions. The main board is responsible for further digitizing, analyzing, and transmitting the amplified EEG signals. The design of installing the main board inside the amplifier module 5 helps save space, improve the integration of the device, and place the amplifier and the signal processing unit in the same area, reducing interference and loss during signal transmission. The design of the FPC cable 4 extending into the amplifier module 5 ensures efficient signal transmission from the amplifier to the main board and can ensure stable connection, avoiding errors caused by loose connection or signal attenuation.
[0062] In the above embodiment, the portable EEG signal acquisition device realizes efficient signal amplification and transmission through the close cooperation of the carefully designed amplifier module 5, main board, and FPC cable 4. Installing the amplifier module 5 in the middle position of the rear half-ring 2 not only optimizes the spatial layout but also improves the stability of signal transmission. The FPC cable 4 connects the amplifier module 5 and the main board, ensuring smooth and accurate signal transmission, and at the same time enhancing the overall integration and portability of the device. This design can effectively improve the performance of the EEG signal acquisition device and ensure its applicability to various portable applications.
[0063] In some embodiments, the housing of the annular body is made of a silicone housing. Silicone is a soft and elastic material, which makes the whole device more suitable for long-term wearing and provides a comfortable use experience. The silicone housing can effectively wrap the internal electronic components and provide a certain degree of protection for the device. It has good shock resistance and durability, can protect the internal circuit from external impacts, and at the same time has waterproof and dustproof characteristics, ensuring that the device can work properly in various environments. In addition, the silicone material is skin-friendly, reducing irritation to the skin of the wearer, and is suitable for use in a head-mounted EEG signal acquisition device, especially for long-term wearing.
[0064] In some embodiments, as Figure 1 shown, the portable EEG signal acquisition device further includes a reference electrode 33 led out by a wire from inside the annular body. The reference electrode 33 plays an important role in the EEG signal acquisition process and can be used to provide a stable electrical reference to ensure the accuracy of signal measurement. Specifically, the reference electrode 33 can be set in the form of an earclip electrode.
[0065] In some embodiments, the EEG signal acquisition and sensing component uses an EEG signal acquisition sensor 31 with a telescopic length or an EEG signal acquisition sensor 31 with different replaceable lengths.
[0066] As Figure 1 , Figure 2 and Figure 5 shown in the embodiments, an electroencephalogram (EEG) signal acquisition sensor 31 with a telescopic length is adopted. Through the telescopic design, the EEG signal acquisition sensing assembly can be adjusted according to different head sizes, the needs of the wearer, and the usage scenarios. This design improves the versatility of the device and is suitable for users of different body types. Especially when the wearer needs to adjust the length of the EEG signal acquisition sensing assembly according to their personal head shape, more flexible options are provided. The user can adjust the length of the EEG signal acquisition sensing assembly according to specific needs, making the EEG signal acquisition sensing assembly contact the skin more closely and enhancing the signal acquisition effect. Especially during the EEG signal acquisition process, good contact of the EEG signal acquisition sensing assembly is the key to ensuring signal quality. The EEG signal acquisition sensing assembly with a telescopic length can help disperse the pressure applied to the skin, reduce discomfort, and avoid excessive compression on the skin.
[0067] As Figure 6 shown in the embodiments, the EEG signal acquisition sensing assembly adopts EEG signal acquisition sensors 31 with replaceable different lengths. Compared with electrodes with a fixed length, adopting EEG signal acquisition sensors 31 with replaceable different lengths enables the device to meet more user needs. The user can replace the EEG signal acquisition sensing assembly with a suitable length according to their personal head shape and wearing habits to ensure the best wearing effect and signal acquisition quality. In different application scenarios, EEG signal acquisition sensing assemblies with different lengths may be required to adapt to special wearing positions or different electroencephalogram acquisition requirements. By replacing the EEG signal acquisition sensors 31, the configuration of the device can be conveniently adjusted and optimized to meet the requirements of various scenarios. If a certain EEG signal acquisition sensor 31 is damaged or needs to be cleaned, simply replace the EEG signal acquisition sensing assembly with a different length, which reduces the complexity of maintenance.
[0068] As at least one implementable manner, as Figures 7 - 8As shown, the length-retractable sensing assembly comprises: a sleeve 311, an elastic member 312 installed in the sleeve 311, and an electrode needle 313 for collecting brain electrical signals in a state of contact with the human head; the electrode needle 313 comprises an electrode disk portion 3131 and a plurality of needle bodies 3132 arranged on one side of the electrode disk portion 3131; the first end of the sleeve 311 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 3131 can be stuck in the position of the limiting rib to prevent it from coming out of the first end of the sleeve; the first end of the elastic member 312 One end of the electrode disc portion is against the side of the needle body away from the electrode disc portion, and the other end is used to abut against a fixing member, so that the needle body 3132 of the electrode needle can automatically adjust the telescopic length based on the head circumference of the subject; at least one limiting protrusion 3133 is provided on the outer peripheral surface of the electrode disc portion 3131, and the wall portion of the sleeve 311 has a corresponding guide groove 3111, which extends along the generatrix direction of the sleeve 311, and the limiting protrusion 3133 is inserted into the guide groove 3111, so that the electrode needle 313 can be telescoped within the allowable length range of the guide groove 3111. In order to adapt to the changes in the head circumference or head shape of the subject, the elastic member ensures that the electrode needle always maintains an appropriate contact pressure with the skin.
[0069] In the above embodiment, the portable EEG signal acquisition device can use a needle-type dry electrode, and through the innovative design of the limiting protrusion and guide groove, the automatic adjustment function of the elastic member and the stable sleeve structure, it can maintain stable electrode contact under different head circumferences, thereby providing accurate EEG signal acquisition effects. These structures and designs ensure that the EEG signal acquisition sensor component can effectively adapt to different subjects during use, ensuring the quality and stability of the EEG signal.
[0070] Furthermore, if Figure 8 As shown, the electrode disk portion 3131 of the electrode needle 313 includes a coaxially arranged main section 3131a and a transition section 3131b, the diameter of the main section 3131a is larger than the diameter of the transition section 3131b, and the limiting protrusion 3133 is arranged on the outer peripheral wall of the main section 3131a; the inner diameter of the opening of the first end of the sleeve 311 is larger than the outer diameter of the transition section 3131b, and smaller than the outer diameter of the main section 3131a. This design can ensure that the main section of the electrode needle is always stably supported in the sleeve during the extension and retraction process, and the transition section provides a smooth transition space for the extension and retraction of the electrode needle. This structure effectively ensures the stability and accuracy of the electrode needle during the extension and retraction process through reasonable size design, and avoids the instability caused by structural mismatch or excessive extension and retraction.
[0071] Further, there is an annular gap between the main body section 3131a of the electrode disc portion 3131 and the inner wall of the sleeve 311, and there is also an annular gap between the transition section 3131b and the inner wall of the first end opening of the sleeve 311, so that the electrode disc portion 3131 can swing relative to the sleeve 311 within a set angle range, such that the electrode disc portion can swing relative to the sleeve within a set angle range (such as 0-3°). Due to the annular gap between the electrode disc portion and the sleeve, the electrode disc portion can swing relative to the sleeve within a set angle range. This swing can enable the electrode disc portion to adjust the angle as needed during operation (such as to adapt to the irregular curved surface or minute error of the test head shape), thereby optimizing the working efficiency or adapting to different operating conditions.
[0072] On the other hand, the present invention also provides a signal acquisition device, as Figure 9 shown. The signal acquisition device includes: an integration device 6 and an electroencephalogram device. The integration device 6 includes a connection interface 61, a plurality of electroencephalogram detection points 62, and a plurality of human body detection points 63. The connection interface 61 is used to connect the electroencephalogram device, and the electroencephalogram device includes the aforementioned portable electroencephalogram signal acquisition device. In this embodiment, the signal acquisition device can be used to detect electroencephalogram signals and human body physiological signals. The electroencephalogram detection points 62 and the human body detection points 63 are integrated in the integration device 61. As an alternative solution, both the electroencephalogram detection points 62 and the human body detection points 63 can be hole positions. When signal detection is required, the above hole positions can be connected to the corresponding electroencephalogram signal acquisition and sensing components.
[0073] The number of human body detection points 63 can be set according to actual needs. For example, the number of human body detection points 63 can be M. If n human body physiological signals need to be detected, then n human body detection points 63 can be connected to the corresponding detection electrodes. At this time, the number of human body detection points 63 in the access state is n, that is, n out of M human body detection points 63 are in the access state. Both M and n are positive integers and M is greater than or equal to n. As Figure 9 shown, for example, M = 8.
[0074] In the embodiment 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. Then the number of channels of the detected electroencephalogram signals is N - n, where N is a positive integer and N is greater than n. For example, N = 32, n = 8, then N - n = 24.
[0075] In the embodiments of the present invention, n human body detection points 63 are used to detect n-channel human physiological signals when in the access state; the electroencephalogram device is used to detect N-n channel electroencephalogram signals when connected to the integrated device 5 through the connection interface 61; or, N-n electroencephalogram detection points 62 are used to detect N-n channel electroencephalogram signals when the electroencephalogram device is not connected to the integrated device 6 through the connection interface 61.
[0076] In the embodiments of the present invention, when using the electroencephalogram device to collect electroencephalogram signals, the user can directly wear the electroencephalogram device to complete the collection, so that the user can conveniently collect electroencephalogram signals; when using the electroencephalogram detection points to collect electroencephalogram signals, the user can select the required electroencephalogram detection points by himself, thus meeting the diverse user needs. Through the synchronous collection method provided by the embodiments of the present invention, the above electroencephalogram device and electroencephalogram detection points can be extended for synchronous collection of human physiological signals. When collecting electroencephalogram signals, the human body detection points can be used to collect human physiological signals at the same time, without firmware upgrade of the original electroencephalogram device, improving the flexibility of electroencephalogram signal collection, and realizing synchronous collection of multi-modal signals such as electroencephalogram signals and human physiological signals. These signals based on synchronous collection are convenient for predicting and analyzing human physiological / psychological / mental / health and other states.
[0077] In some embodiments, the signal acquisition device further includes a control circuit; as Figure 10 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 electroencephalogram signal channel branches. Both M and N are positive integers and N is greater than M.
[0078] The integrated signal channel branch is used to select the positive human physiological signal and the corresponding negative human physiological signal detected by the human body detection point, the positive electroencephalogram signal and the corresponding negative electroencephalogram signal detected by the electroencephalogram device, or the positive electroencephalogram signal and the corresponding negative electroencephalogram signal detected by the electroencephalogram device. The electroencephalogram signal channel branch is used to select the positive electroencephalogram signal and the corresponding negative electroencephalogram signal detected by the electroencephalogram device or the positive electroencephalogram signal and the corresponding negative electroencephalogram signal detected by the electroencephalogram device. The analog integrated front end is used to calculate n human physiological signals according to the selected n positive human physiological signals and the corresponding negative human physiological signals, and calculate N-n electroencephalogram signals according to N-n positive electroencephalogram signals and the corresponding negative electroencephalogram signals. n is a positive integer, and N is greater than n.
[0079] 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.
[0080] As Figure 10 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.
[0081] 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.
[0082] 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.
[0083] In the present invention, 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.
[0084] 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 changes and modifications 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. A portable electroencephalogram signal acquisition device, characterized in that It includes an annular body and a plurality of electroencephalogram signal acquisition and sensing components mounted on the annular body; The annular body includes a front half-ring and a rear half-ring. One of the front half-ring and the rear half-ring structures is provided with a plugging strip, and the other half-ring structure is provided with a plugging groove, and the plugging strip extends into the plugging groove; The plugging strip structure includes a plurality of first tooth structures arranged in an array along its length direction, and a control component is arranged in the plugging groove of the other half-ring structure; The control component includes an operating member, an elastic member and a connecting rod; wherein, the operating member is connected to the first end of the connecting rod through the elastic member, the middle part of the connecting rod is rotatably connected to its half-ring structure, and a second tooth structure is formed at the second end of the connecting rod; The operating member is used to press the connecting rod so that the second tooth is combined with or separated from the first tooth; in the state where the second tooth is combined with the first tooth, the second tooth structure is inserted between two adjacent first tooth structures to realize the fixation of the front half-ring and the rear half-ring; in the state where the second tooth is separated from the first tooth, the front half-ring and the rear half-ring can move relatively along the length direction of the plugging strip.
2. The portable electroencephalogram signal acquisition device according to claim 1, wherein The first tooth and the second tooth have inclined surfaces facing each other and parallel to each other.
3. The portable electroencephalogram signal acquisition device according to claim 1, wherein The operating member is in the form of a button structure protruding from the outer surface of the half-ring structure, and is integrally formed with or fixedly connected to the connecting rod; An elastic member bracket is fixedly arranged at a position corresponding to the operating member in the half-ring structure, and two ends of the elastic member respectively abut against the inner wall of the operating member and the elastic member bracket, so that the operating member and the connecting rod return to the original state.
4. The portable electroencephalogram signal acquisition device according to claim 3, characterized in that A limiting structure is formed between the operating member and the elastic member bracket to prevent the second end of the connecting rod from swinging excessively.
5. The portable electroencephalogram signal acquisition device according to claim 1, wherein The electroencephalogram signal acquisition and sensing components include a forehead sensing component mounted on the front half-ring and a posterior brain sensing component mounted on the rear half-ring. The forehead sensing component includes at least one electroencephalogram signal acquisition sensor, and the posterior brain sensing component includes at least one electroencephalogram signal acquisition sensor; All the electroencephalogram signal acquisition sensors in the forehead sensing component and the posterior brain sensing component are connected through an FPC cable, and the FPC cable is arranged in the shell of the annular body.
6. The portable electroencephalogram signal acquisition device according to claim 5, wherein The FPC cable is provided with a folding part at a position corresponding to the plugging groove and the plugging strip, which is used as the telescopic margin corresponding to the length change of the front half-ring and the rear half-ring; and / or, The portable electroencephalogram signal acquisition device further includes: a GND electrode mounted on the front half-ring, and the GND electrode is connected to the FPC cable; and / or, The portable electroencephalogram signal acquisition device further includes an amplifier module, and the amplifier module is mounted at the middle position of the rear half-ring; the portable electroencephalogram signal acquisition device further includes a main board mounted inside the amplifier module, and the FPC cable has an amplifier connection terminal extending into the amplifier module for connecting to the main board; and / or, The shell of the annular body is a silica gel shell, and the portable electroencephalogram signal acquisition device also includes a reference electrode led out from the annular body by a wire.
7. The portable electroencephalogram signal acquisition device according to claim 5, characterized in that, The EEG signal acquisition sensor component adopts a sensor component with retractable length or a sensor component with different replaceable lengths.
8. The portable electroencephalogram signal acquisition device according to claim 7, characterized in that, The length-retractable sensing component comprises: 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.
9. The portable electroencephalogram signal acquisition device according to claim 8, characterized in that, 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.
10. The portable electroencephalogram signal acquisition device according to claim 9, characterized in that, 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.
11. A signal acquisition device, characterized in that, include: An integrated device and an electroencephalogram device, wherein the integrated device comprises a connection interface, a plurality of electroencephalogram detection points and a plurality of human body detection points, wherein the connection interface is used to connect the electroencephalogram device, and the electroencephalogram device comprises the portable electroencephalogram signal acquisition device according to any one of claims 1 to 10; The n human body detection points are used to detect n channels of human body physiological signals when in an access state; The EEG device is used to detect EEG signals of Nn channels when the EEG device is connected to the integrated device through the connection interface; or the Nn EEG detection points are used to detect EEG signals of Nn channels when the EEG device is not connected to the integrated device through the connection interface; N and n are both positive integers, and N is greater than n.
12. The signal acquisition device according to claim 11, characterized in that, The EEG device is used to detect EEG signals of N channels when the integrated device is connected via 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.
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 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 and pass the positive human physiological signals and corresponding negative human physiological signals detected at the human 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 and pass 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.