Wearable electroencephalogram acquisition helmet for neurolinguistics experiment

Abstract

The utility model relates to the technical field of wearable intelligent equipment, and discloses a wearable electroencephalogram acquisition helmet for a neurolinguistics experiment, which comprises a self-adjusting cap body and a plurality of electrode modules, the self-adjusting cap body comprises a head surrounding belt and a plurality of electroencephalogram acquisition belts; the plurality of electrode modules are arranged on the plurality of electroencephalogram acquisition belts according to a preset mode; the head shroud ring has a first width, and a plurality of first strip holes are formed in the circumference; a first adjusting mechanism is arranged on the head surrounding belt; all the electroencephalogram collecting belts are at least connected with three second adjusting mechanisms, and each second adjusting mechanism is located on the outer side of the corresponding first strip hole. The helmet can adapt to head circumferences of different sizes and head shapes of different shapes, and the product is more universal; therefore, material resource cost is saved, operation is simple and convenient, time and labor are saved, and electroencephalogram data acquisition efficiency is improved. According to the scheme, the design application range is wide, the method is suitable for various neurolinguistics experiments such as bilingual conversion experiments and bilingual translation experiments, and therefore the scheme design has high application value.

Description

Technical Field

[0001] The utility model relates to the technical field of wearable intelligent devices, and in particular to a wearable electroencephalogram (EEG) collection helmet for neurolinguistics experiments. Background Art

[0002] Neurolinguistics is a discipline that explores the language processing process of the brain from the perspective of neuro-electrophysiology. Common research methods and approaches in this discipline include ERPs (Event Related Potentials), fMRI (Functional Magnetic Resonance Imaging), MEG (Magnetoencephalography), etc. Among them, the most widely used research method and approach is ERPs (Event Related Potentials). At present, the experimental equipment used for this research method is mainly EEG caps.

[0003] However, in actual application, there are the following problems: During EEG experiments, each electrode point on the EEG cap is connected to the amplifier by an electrode wire, that is, the entire EEG cap needs to be connected with electrode wires during the experiment. The disadvantage of this design is that the electrode wires need to be removed one by one during cleaning, and then connected to the EEG cap one by one during use. Such a design is time-consuming and labor-intensive, and affects the comfort of the subjects. In addition, to ensure that EEG data is collected at the exact location of the scalp, EEG caps are generally equipped with three large and medium-sized models to adapt to the different head circumferences of the subjects; if there is only one set of electrode wires, different models of EEG caps have to share a set of electrode wires, and then the electrode wires need to be removed from one model of EEG cap one by one, and then connected to another model of EEG cap one by one. The disadvantage of this design is that it increases material costs, is troublesome to operate, is time-consuming and labor-intensive, and reduces the efficiency of collecting EEG data. Utility Model Content

[0004] The utility model aims to provide a wearable electroencephalogram (EEG) collection helmet for neurolinguistics experiments, so as to solve the technical problems that the existing EEG caps are not universal and inconvenient to operate.

[0005] The basic scheme provided by the utility model is: a wearable EEG collection helmet for neurolinguistic experiments, comprising a self-adjusting cap body and a plurality of electrode modules for collecting EEG signals; the self-adjusting cap body comprises a head circumference band and a plurality of EEG collection bands; a plurality of the electrode modules are arranged on the plurality of EEG collection bands in a preset manner;

[0006] The headband has a first width and is provided with a plurality of first holes on its circumference; a first adjustment mechanism is provided on the headband; all the EEG collection belts are connected with at least three second adjustment mechanisms, and each second adjustment mechanism is located outside the corresponding first hole.

[0007] The working principle and advantages of the utility model are as follows: the helmet of the present scheme can be adaptively adjusted according to the head circumference size of the subject through the first adjustment mechanism, and can be adaptively adjusted according to the head shape of the subject through the second adjustment mechanism, thereby making the entire helmet well adapted to the head circumference and head shape of various groups of people, making the product more universal, saving costs, and simplifying the experimental process.

[0008] At the same time, the head circumference strap and several EEG collection straps are movably connected. Therefore, when the head circumference strap is adjusted through the first adjustment structure, the second adjustment structure can be driven to make rough adjustments to several EEG collection straps. If there is still an inappropriate situation, the second adjustment mechanism can be used to further fine-tune the EEG collection straps to make them fit the subject's head shape well. It has the advantages of high fit, convenient adjustment operation and high wearing efficiency.

[0009] In addition, at least three second adjustment mechanisms are provided to achieve the effect of quickly adjusting one surface at three points, so as to achieve the purpose of conveniently adapting to different head shapes of subjects.

[0010] The wearable EEG acquisition helmet of this scheme has a wide range of applications and is suitable for various neurolinguistic experiments, and is particularly suitable for promotion and use in bilingual conversion and bilingual translation experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of the structure of a wearable EEG acquisition helmet for neurolinguistics experiments provided by an embodiment of the utility model;

[0012] Figure 2 The structure of the headband provided by the embodiment of the utility model is schematically shown Figure 1 ;

[0013] Figure 3 A schematic diagram of the structure of a first adjustment mechanism provided in an embodiment of the utility model;

[0014] Figure 4 The structure of the headband provided by the embodiment of the utility model is schematically shown Figure 2 ;

[0015] Figure 5 The structure of the EEG acquisition belt provided by the embodiment of the utility model is schematically shown. Figure 1 ;

[0016] Figure 6 The structure of the EEG acquisition belt provided by the embodiment of the utility model is schematically shown. Figure 1 ;

[0017] Figure 7 A schematic diagram of the structure of the second adjustment structure provided by an embodiment of the utility model;

[0018] Figure 8The structure of the electrode module base provided by the embodiment of the utility model is shown in FIG. Figure 1 ;

[0019] Fig. 9 The structure of the electrode module base provided by the embodiment of the utility model is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0020] The following is a further detailed description through specific implementation methods:

[0021] The marks in the drawings of the specification include: self-adjusting cap body 10, head circumference band 11, first adjustment mechanism 111, shell 1111, winding mechanism 1112, micro motor 1113, battery 1114, pressure sensor 1115, switch 1116, first hole 112, EEG collection belt 12, second adjustment mechanism 121, reel 1211, limit assembly 1212, main belt 122, auxiliary belt 123, elastic part 13, electrode module 20, electrode module base 21, opening 211, cavity 212, flat mouth 213, canning mouth 214.

[0022] The embodiment is basically as shown in the attached Figure 1 As shown: a wearable EEG collection helmet for neurolinguistic experiments, comprising a self-adjusting cap body 10 and a plurality of electrode modules 20; the self-adjusting cap body 10 comprises a head circumference band 11 and a plurality of EEG collection bands 12; the plurality of electrode modules 20 are arranged on the plurality of EEG collection bands 12 in a preset manner. In this embodiment, the band portion of the self-adjusting cap body 10 can be made of a lightweight carbon fiber material, which is flexible and adjustable, comfortable to wear and durable.

[0023] like Figure 2 and Figure 3As shown, the head circumference band 11 is provided with a first adjustment mechanism 111. Through the adjustment of the first adjustment mechanism 111, the helmet can adapt to different head circumference sizes. The first adjustment mechanism 111 is located between the back of the head and the ear, not directly behind the back of the head, to make way for the second adjustment mechanism of the main band of the EEG acquisition band. The first adjustment mechanism 111 includes a shell 1111, which can be hollow or closed; it includes a winding mechanism 1112 installed in the shell 1111 and a pressure sensor 1115 installed outside the shell 1111, wherein one end of the head circumference band 11 is fixedly connected to the winding mechanism 1112, and the other end 1112 is movably connected to the winding mechanism 1112. The winding mechanism 1112 can roll up the adjustment section of the head circumference band 11 coaxially, and can also move with the adjustment section of the head circumference band 11 by using an adaptive toothed structure belt-like movement or other methods that can achieve parallel movement. The reeling mechanism 1112 is connected to a micro motor 1113 that drives the reeling mechanism 1112 to automatically retract. The micro motor can be a ZWPD012012-6 model product. The specific selection can be reasonably selected according to the material of the cap body and the required power. The micro motor 1113 is connected to a battery 1114 that supplies power to the micro motor 1113. The battery can be rechargeable to meet the requirements of long-term use. The pressure sensor 1115 is connected to a microprocessor. The microprocessor is arranged in the housing and connected to the micro motor 1113. A switch 1116 is arranged outside the housing 1111, including a contraction switch and a release switch, which is connected to the microprocessor and is used to start and stop the first adjustment mechanism 111 and to reversing the rotation of the headband to adjust the retraction of the headband.

[0024] like Figure 4 As shown, the headband 11 has a first width, and a plurality of first holes 112 are opened on the circumference for active connection with the EEG collection belt 12. In this embodiment, the first width w can be 5-8 cm, which is a reasonable width and comfortable to wear. At the same time, it is easy to connect with the EEG collection belt 12 stably and is not prone to curling.

[0025] All the EEG collection belts are connected to at least three second adjustment mechanisms, and each second adjustment mechanism is located outside the corresponding first hole.

[0026] Specifically, Figure 5As shown, the several EEG collection belts 12 include a main belt 122 and N auxiliary belts 123 to cover key positions of the scalp, such as the frontal area, the top area and the temporal area, to capture weak EEG signals during language processing; the main belt 122 is arranged along the sagittal axis of the self-adjusting cap body 10, with both ends passing through the corresponding two first holes 112 and both ends being provided with a second adjustment mechanism 121; the N auxiliary belts 123 are symmetrically arranged on both sides of the sagittal axis, with one end elastically connected to the main belt 122 through an elastic member 13, and the other end passing through the corresponding first hole 112 and connected to the second adjustment mechanism 121, or the other end being elastically connected to the head circumference belt 11 through an elastic member 13. It should be noted that in order to better display the EEG collection belt 12 itself, Figure 5 and Figure 6 The electrode module 20 is not shown in the figure. In fact, an electrode module base 21 is arranged in a preset manner on the EEG acquisition belt 12 for installing the electrode module 20 .

[0027] The elastic member 13 is a strip structure, wherein the elasticity of the elastic member is greater than the elasticity of the EEG collection belt 12. The setting of the elastic member 13 can simultaneously play a role in the rough adjustment of the EEG collection belt 12 with the second adjustment mechanism 121, and can reduce the adjustment of the second adjustment mechanism 121, further improving the wearing efficiency. The width of the elastic member 13 between adjacent EEG collection belts can be set to 1-3cm to meet the appropriate rough adjustment range, avoid large stretching, resulting in displacement of the electrode module, inaccurate positioning, and the need for repeated adjustment.

[0028] like Figure 6 As shown, in this embodiment, N is 6, wherein two auxiliary straps 123 are arranged along the coronal axis of the self-adjusting cap body 10, and the other ends of the two auxiliary straps 123 pass through the corresponding first holes 112 and are provided with second adjustment mechanisms 121, and the other four auxiliary straps 123 are elastically connected to the head circumference strap 11 through elastic members 13. Because in neurolinguistic experiments, the positions of the sagittal axis and the coronal axis are mainly adjusted, the above settings are used to keep the adjustable second adjustment mechanisms 121 at an appropriate number, reduce the adjustment points, and at the same time drive the other four auxiliary straps 123 to perform adaptive adjustments through the elastic member 13, which can meet the experimental requirements on the basis of ensuring the appropriate adjustment points, and can also adapt the position of the electrode module 20 to the head circumference and head shape under the adjustment of the first adjustment mechanism 111 and the second adjustment mechanism 121.

[0029] like Figure 7As shown, the second adjustment mechanism 121 includes a reel 1211 with a limiting component 1212, wherein the reel 1211 is rotatably connected to one end of the EEG collection belt 12. The limiting component 1212 can be a locking member, such as a bolt or other parts with a locking function, so that the rotation of the reel can be adjusted. The limiting component 1212 can be used to limit the reel 1211, so that the second adjustment structure is in a limited state and cannot freely drive the EEG collection belt 12 to rotate, or is in a non-limited state and can freely drive the EEG collection belt 12 to rotate. In other embodiments, the second adjustment structure 121 can be implemented using a torsion spring shaft mechanism.

[0030] The first adjustment mechanism 111 and the second adjustment mechanism 121 are detachably connected to the head circumference band 11 and the EEG collection band 12, respectively. The EEG collection band 12 connected with the second adjustment mechanism 121 includes an electrode section and an adjustment section, wherein the adjustment section is not provided with electrodes, and the adjustment section is connected to the detachable part of the electrode section; the head circumference band 11 includes a main body section and adjustment sections located at both ends of the main body section, and the adjustment section is connected to the detachable part of the main body section. The adjustment section is mainly used for adjusting the mechanism to rotate and adjust the length of the band body to adapt to different head circumference sizes and head shapes, and signal collection is not required; the detachable connection can be made by zipper or buckle, so that the band parts of the head circumference band 11 and the EEG collection band 12 can be disassembled for independent cleaning, which does not cause pollution or damage to the adjustment mechanism and increases the service life of the components; in addition, the setting of the detachable structure enables each component to be independently maintained, and the replacement is flexible, which saves costs.

[0031] like Figure 1 As shown, the electrode modules 20 are arranged on a plurality of EEG collection belts 12 in a preset manner; an electrode module base 21 is provided on the EEG collection in a preset manner for stably placing the electrode module 20; the preset manner is a high-density EEG 64-lead, 128-lead or 256-lead layout.

[0032] The electrode module of the helmet of this scheme can send EEG data to the analysis software in real time through Bluetooth transmission technology, and connect to the display screen for display, which can provide intuitive analysis results for neurolinguistic research, avoid the wire connection of electrode wires during EEG acquisition experiments, and improve experimental efficiency and convenience. Specifically, the following method can be adopted: each of the electrode modules 20 is a Bluetooth component, and each electrode module transmits signals to the outside through the corresponding Bluetooth component; or a Bluetooth component is set on the headband 11, and all electrode modules 20 are connected to the Bluetooth component through electrode wires, and signals are transmitted to the outside through a Bluetooth component.

[0033] When conducting a neurolinguistic experiment, the specific method of using this helmet mainly includes the following steps:

[0034] The limiting component 1212 of the second adjusting mechanism 121 is adjusted to the unlimited state, at which time the second adjusting mechanism 121 can drive the EEG collection belt 12 to rotate freely, and the length of the EEG collection belt 12 can be freely adjusted; the entire self-adjusting cap body 10 is worn on the subject's head, and the head circumference band 11 is worn at a suitable position of the subject's head circumference, and the first adjusting mechanism 111 is started by the switch 1116. At this time, the micro motor 1113 drives the winding mechanism 1112 to drive the head circumference band 11 to be wound and extended, and the pressure sensor 1115 detects the pressure between the head and tail bands and the subject's head, and the pressure data is transmitted to the microprocessor. The microprocessor stops the micro motor 1113 according to the pressure data, so that the head circumference band 11 is adjusted to a position suitable for the subject's head circumference, and is comfortable to wear without being tight.

[0035] Since the head circumference band 11 and the plurality of EEG collection bands 12 are movably connected, the second adjustment mechanism 121 is in an unrestricted state, and elastic members 13 are provided between the EEG collection bands 12. Therefore, when the head circumference band 11 is adjusted by the first adjustment structure, the second adjustment mechanism 121 and the elastic member 13 simultaneously play a role in coarse adjustment of the plurality of EEG collection bands 12 to automatically adapt to the head shape of the subject, check the position state of each EEG collection band 12, and if there is still an inappropriate situation, adjust it through the second adjustment mechanism 121. The main band 122 can be adjusted first. After the position is suitable, the second adjustment mechanism 121 corresponding to the main band 122 is adjusted to a limited state, and then the auxiliary band 123 located on the coronal axis is adjusted. After the position is suitable, the second adjustment mechanism 121 corresponding to the auxiliary band 123 of the coronal axis is adjusted to a limited state, so that the entire flexible shell 1111 adapts to the head circumference size and head shape of the subject, has the advantages of high fit, convenient adjustment operation, and high adjustment efficiency.

[0036] The electrode module 20 is installed on the EEG collection belt 12 in a preset manner. During the experiment, its Bluetooth module is used to collect EEG data in real time through Bluetooth transmission technology and send it to the analysis software, which is connected to the display screen to provide intuitive analysis results for neurolinguistic research.

[0037] When the experiment of the subject is finished, the motor of the first adjustment mechanism 111 is started to restore the headband 11 to its initial position, the entire cap body can be removed from the subject's head, and the second adjustment mechanism 121 is restored to an unrestricted state, and the next subject can wear the cap according to the above steps for the experiment.

[0038] After the experiment, when the cap needs to be cleaned, the electrode module 20 can be removed from the EEG collection belt 12, and the belt body and the adjustment mechanism can be disassembled through the detachable parts on the head belt 11 and the EEG collection belt 12, and the belt body can be removed for independent cleaning.

[0039] The wearable EEG collection helmet for neurolinguistic experiments provided in this embodiment uses lightweight carbon fiber cross-bands to form an adjustable flexible perforated shell to ensure comfortable and durable wearing. The telescopic structure is used to realize the adaptive adjustment of the cap body. The head circumference band is adjusted to adapt to the head circumference size through the first adjustment mechanism, and the EEG collection band is adjusted to adapt to the head shape through the second adjustment structure. It can adapt to the head circumference of various people, making the product more versatile, reducing multiple models of helmets, saving material costs, reducing helmet replacement, and simplifying the experimental process. At the same time, through the adaptive adjustment of head circumference and head shape, the fit between the entire cap body and the subject's head is improved, ensuring that the electrode module and the scalp maintain a constant contact pressure, improving the signal quality, and having the advantage of high fit. It is a universal and reliable EEG signal acquisition tool. Equipped with Bluetooth transmission technology, the EEG data is sent to the analysis software in real time, and the display screen is connected to provide intuitive analysis results for neurolinguistic research. This helmet has the advantages of high versatility, high fit, light weight, low cost, and easy experimental operation and adjustment. It can be used in various neurolinguistic experiments and has a wide range of applications. It can be particularly used in bilingual conversion and bilingual translation experiments and is suitable for promotion and use.

[0040] Embodiment 2

[0041] Different from the first embodiment, Figure 8 and Fig. 9 As shown, the electrode module base 21 on the EEG collection belt 12 includes an opening 211, a cavity 212, a flat mouth 213 and a filling mouth 214; the electrode module 20 is placed through the opening 211, the conductive material is filled into the cavity 212, and the surface of the base is pressed to squeeze out the conductive material through the flat mouth 213 onto the EEG data collection end of the electrode module 20; the flat mouth 213 is arranged at an angle.

[0042] The wearable EEG collection helmet for neurolinguistic experiments provided in this embodiment optimizes the base structure of the electrode module and the filling method of the conductive material. Through cavity canning, it is sufficient for multiple subjects to use in experiments, reducing the number of times the conductive material is applied and improving the overall experimental efficiency of multi-person experiments. The base can be made of an extrudable material with a certain hardness. The setting of a certain hardness ensures moderate extrusion to avoid squeezing too much conductive material each time. The flat mouth is tilted to avoid easy overflow of the conductive material. After multiple uses, the base can be replaced independently to reduce the probability of contamination of the cap body and extend the service life of the cap body to a certain extent.

[0043] Embodiment 3

[0044] Different from the first and second embodiments, the first adjustment mechanism 111 and the second adjustment mechanism 121 are provided with reading components, and the reading components have built-in Bluetooth modules; the headband 11 has scales.

[0045] The wearable EEG collection helmet for neurolinguistic experiments provided in this embodiment can obtain the adjustment distance of the head circumference band and the EEG collection band according to the reading component. The scale on the head circumference band and its corresponding reading component can obtain the head circumference data of the human body to be tested through two methods: manual reading and component reading, wherein the component reading is sent to the back-end storage via Bluetooth; the manual reading is used as a judgment of the correctness of the reading of the reading component. The adjustment distance related data can be sent to the back-end storage via Bluetooth, and can also be used for model training to analyze the relationship between head circumference adjustment and head shape adjustment, and can be used for the optimization of the band body in the later stage to improve the utilization value of the helmet adjustment data of this scheme.

[0046] Embodiment 4

[0047] What is different from the first, second and third embodiments is that the several electrode module bases 21 on each EEG collection belt 12 are connected in series, one end of the string is fixed to one end of the EEG collection belt 12, and the other end of the string is connected to the EEG collection belt 12 through an elastic connecting line. By adjusting the length of the elastic connecting line, the position of the electrode module 20 can be fine-tuned.

[0048] The wearable EEG collection helmet for neurolinguistic experiments provided in this embodiment can further adapt the position of the electrode module to the subject's head shape through the serial arrangement of several electrode module bases and the fine adjustment of the elastic connecting lines, thereby improving the accuracy of EEG data collection.

[0049] The above is only an embodiment of the utility model. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field are aware of all the common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement the scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A wearable EEG collection helmet for neurolinguistic experiments, characterized in that: It comprises a self-adjusting cap body and a plurality of electrode modules for collecting brain electrical signals; the self-adjusting cap body comprises a head circumference band and a plurality of brain electrical acquisition bands; a plurality of the electrode modules are arranged on the plurality of brain electrical acquisition bands in a preset manner; The headband has a first width and is provided with a plurality of first holes on its circumference; a first adjustment mechanism is provided on the headband; all the EEG collection belts are connected with at least three second adjustment mechanisms, and each second adjustment mechanism is located outside the corresponding first hole.

2. The wearable EEG collection helmet for neurolinguistic experiments according to claim 1, characterized in that: The first adjustment mechanism includes a shell, a winding mechanism installed in the shell, and a pressure sensor installed outside the shell; the winding mechanism is connected to a micro motor that drives the winding mechanism to automatically extend and retract; the micro motor is connected to a battery that powers the micro motor; the pressure sensor is connected to a microprocessor; the microprocessor is arranged in the shell and connected to the micro motor.

3. The wearable EEG collection helmet for neurolinguistic experiments according to claim 1, characterized in that: The second adjustment mechanism includes a reel with a limiting component, wherein the reel is connected to the end of a corresponding EEG collection belt and drives the EEG collection belt to be wound around the reel to adjust the length of the EEG collection belt.

4. The wearable EEG collection helmet for neurolinguistic experiments according to claim 1, characterized in that: The several EEG collection belts include a main belt and N auxiliary belts; the main belt is arranged along the sagittal axis of the self-adjusting cap body, and both ends pass through the corresponding two first holes and are provided with second adjustment mechanisms; the N auxiliary belts are symmetrically arranged on both sides of the sagittal axis; one end of each of the auxiliary belts is elastically connected to the main belt through an elastic member, and the other end passes through the corresponding first hole and is connected to the second adjustment mechanism, or the other end is elastically connected to the head circumference belt through an elastic member.

5. The wearable EEG collection helmet for neurolinguistic experiments according to claim 4, characterized in that: When N is 6, two of the auxiliary bands are arranged along the coronal axis of the self-adjusting cap body.

6. The wearable EEG collection helmet for neurolinguistic experiments according to claim 4, characterized in that: The elastic member is a strip-shaped structure, wherein the elasticity of the elastic member is greater than the elasticity of the EEG collection belt.

7. The wearable EEG collection helmet for neurolinguistic experiments according to claim 1, characterized in that: The first adjustment mechanism and the second adjustment mechanism are detachably connected to the head circumference belt and the EEG collection belt respectively.

8. The wearable EEG collection helmet for neurolinguistic experiments according to claim 7, characterized in that: The EEG collection belt connected to the second adjustment mechanism includes an electrode section and an adjustment section, wherein the adjustment section is not provided with electrodes, and the adjustment section is connected to a detachable part of the electrode section; the head circumference belt includes a main body section and adjustment sections located at both ends of the main body section, and the adjustment section is connected to a detachable part of the main body section.

9. The wearable EEG collection helmet for neurolinguistic experiments according to claim 1, characterized in that: The preset method is a high-density EEG 64-lead, 128-lead or 256-lead layout.

10. The wearable EEG collection helmet for neurolinguistic experiments according to claim 1, characterized in that: The electrode module includes a Bluetooth component, and each electrode module transmits signals to the outside through the Bluetooth component.

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