1. A brain-computer interface system for enhancing the electrical response intensity of hairless brain waves, comprising: the device comprises a screen display interaction unit, an electroencephalogram signal acquisition sensor unit, a signal processing and forwarding unit and a central control unit;

the electroencephalogram signal acquisition sensor unit is connected with the signal processing and forwarding unit;

the signal processing and forwarding unit is connected with the central control unit;

the central control unit is connected with the screen display interaction unit;

the electroencephalogram signal acquisition sensor unit is connected to a hairless area of a human brain.

2. The brain-computer interface system for enhancing hairless brain-electrical response strength according to claim 1, wherein said central control unit comprises an application stimulation paradigm module and a screen character display interactive system module;

the application stimulation paradigm module and the screen character display interaction system module are connected with the screen display interaction unit.

3. The brain-computer interface system for enhancing hairless brain-electrical response strength according to claim 2, wherein said application stimulation paradigm module comprises:

the device comprises a stimulation paradigm module based on a visual field space coding mode, a stimulation paradigm module based on a special picture stimulation sequence mode and/or a stimulation paradigm module based on a sound and special picture combined stimulation sequence mode.

4. The brain-computer interface system for enhancing brain-electrical response intensity of hairless zone according to claim 3, wherein the stimulation paradigm module based on field-of-view spatial coding is used for stimulating different brain-electrical responses of human brain based on stimulation of different spatial positions.

5. The brain-computer interface system for enhancing brain-computer response intensity of hairless zone according to claim 3, wherein the stimulation module based on the special image stimulation sequence mode is used for inducing brain-computer response of occipital lobe area, temporal lobe and temporal lobe area and parietal lobe area of human brain based on processing of special images.

6. The brain-computer interface system for enhancing brain-computer response intensity in hairless areas according to claim 3, wherein the stimulation paradigm module based on the way of the combined stimulation sequence of sound and special images is used for inducing the brain-computer response of temporal lobe cortex based on the processing of sound by the human brain and inducing the brain-computer response of occipital lobe area, temporal lobe biased area and parietal lobe area based on the processing of special images by the human brain so as to achieve the purpose of inducing the congruent response of specific areas of the human brain.

7. The brain-computer interface system for enhancing the brain-electrical response intensity of the hairless area according to claim 1, wherein the brain-electrical signal acquisition sensor unit is connected with the brain of the human by adopting a dry electrode, a wet electrode or a novel patch electrode.

8. The brain-computer interface method for enhancing the brain-computer response intensity of hairless area based on the system of any one of claims 1 to 7, comprising:

providing a stimulation paradigm to a user;

acquiring corresponding electroencephalogram signals of the hairless area of the user under the stimulation paradigm;

carrying out noise reduction pretreatment on the electroencephalogram signal to obtain an electroencephalogram signal subjected to noise reduction pretreatment;

further processing the electroencephalogram signals subjected to noise reduction preprocessing to obtain brain-computer interaction response information;

and updating the stimulation paradigm based on the brain-computer interaction response information so as to realize brain-computer interaction.

9. The method of brain-computer interface for enhancing hairless brain-electrical response strength of claim 8, wherein said stimulation paradigm comprises:

a stimulation paradigm based on a mode of field-of-view spatial coding, a mode of special picture stimulation sequence, and/or a mode of sound and special picture joint stimulation sequence.

10. The method of brain-computer interface for enhancing brain-computer response intensity of hairless zone according to claim 8, wherein the manner of obtaining the corresponding brain electrical signal of the hairless zone of the user in the stimulation paradigm is:

the brain-electrical signal acquisition sensor unit is connected with the human brain in a dry electrode, wet electrode or novel patch electrode mode.

Background

As a completely new, non-muscular communication channel, BCI enables a person to express ideas or manipulate devices directly through the brain without the aid of language or body movements. For severely motor disabled patients, BCI can communicate their intent to an external device, thereby improving their quality of life. Although BCI has been a long-standing development in paradigms, algorithms and systems. However, the BCI system is expected to go into a life scenario and is also required to face a number of challenges.

The main response areas of the conventional paradigm application scenario where BCI is visually evoked are located in the occipital lobe and parietal lobe, corresponding to the posterior brain scoop and vertex of the human brain. In order to collect the electroencephalogram signals at the positions, a user needs to wear a multi-lead electroencephalogram cap, which is not beneficial to use in daily life

Non-visually evoked BCIs can respond more strongly in hairless areas, but their own signal-to-noise ratio is lower, high-rate information interaction cannot be achieved, fewer functions can be achieved in use, or the communication rate is slower.

For the above reasons, although the existing BCI system can achieve fast communication and high accuracy, it still lacks a good application scenario and is difficult to be widely applied in real life.

Disclosure of Invention

The invention provides a brain-computer interface system and a brain-computer interface method for enhancing hairless area electroencephalogram response intensity, which are used for solving the defects of inconvenience in wearing and low communication speed in the prior art and realizing convenient wearing and high-speed information interaction.

In a first aspect, the present invention provides a brain-computer interface system for enhancing the electroencephalogram response intensity of hairless areas, comprising: the device comprises a screen display interaction unit, an electroencephalogram signal acquisition sensor unit, a signal processing and forwarding unit and a central control unit;

the electroencephalogram signal acquisition sensor unit is connected with the signal processing and forwarding unit;

the signal processing and forwarding unit is connected with the central control unit;

the central control unit is connected with the screen display interaction unit;

the electroencephalogram signal acquisition sensor unit is connected to a hairless area of a human brain.

Furthermore, the brain-computer interface system for enhancing the brain-computer response intensity of the hairless area, provided by the invention, is characterized in that the central control unit comprises an application stimulation paradigm module and a screen character display interaction system module;

the application stimulation paradigm module and the screen character display interaction system module are connected with the screen display interaction unit.

Further, the brain-computer interface system for enhancing the brain-computer response intensity of the hairless area provided by the invention, wherein the application stimulation paradigm module comprises:

the device comprises a stimulation paradigm module based on a visual field space coding mode, a stimulation paradigm module based on a special picture stimulation sequence mode and/or a stimulation paradigm module based on a sound and special picture combined stimulation sequence mode.

Further, the brain-computer interface system for enhancing the brain-computer response intensity of the hairless area, provided by the invention, is characterized in that the stimulation paradigm module based on a field space coding mode is used for stimulating different brain-computer responses of the corresponding human brain based on stimulation of different space positions.

Further, the brain-computer interface system for enhancing the brain electric response intensity of the hairless area, provided by the invention, wherein the stimulation module based on the special image stimulation sequence mode is used for inducing the brain electric response of the occipital lobe area, the temporal lobe and temporal lobe area and the parietal lobe area of the human brain based on the processing of the special image.

Further, the brain-computer interface system for enhancing the brain-computer response intensity of the hairless area, provided by the invention, wherein the stimulation paradigm module based on a mode of combining sound and a special picture to stimulate the sequence is used for inducing the brain-computer response of the temporal lobe cortex based on the processing of the human brain to the sound and inducing the brain-computer response of the occipital lobe area, the area leaning to the temporal lobe and the parietal lobe area based on the processing of the human brain to the special image so as to achieve the purpose of inducing the congruent response of the specific area of the human brain.

Furthermore, the brain-computer interface system for enhancing the brain-computer response intensity of the hairless area, provided by the invention, is characterized in that the brain-computer signal acquisition sensor unit is connected with the human brain in a dry electrode, wet electrode or novel patch electrode mode.

In a second aspect, the present invention provides a brain-computer interface method for enhancing hairless brain electrical response intensity, comprising:

providing a stimulation paradigm to a user;

acquiring corresponding electroencephalogram signals of the hairless area of the user under the stimulation paradigm;

carrying out noise reduction pretreatment on the electroencephalogram signal to obtain an electroencephalogram signal subjected to noise reduction pretreatment;

further processing the electroencephalogram signals subjected to noise reduction preprocessing to obtain brain-computer interaction response information;

and updating the stimulation paradigm based on the brain-computer interaction response information so as to realize brain-computer interaction.

Further, the invention provides a brain-computer interface method for enhancing hairless brain electrical response intensity, wherein the stimulation paradigm comprises:

a stimulation paradigm based on a mode of field-of-view spatial coding, a mode of special picture stimulation sequence, and/or a mode of sound and special picture joint stimulation sequence.

Further, the invention provides a brain-computer interface method for enhancing hairless zone electroencephalogram response intensity, wherein the mode of acquiring the corresponding electroencephalogram signals of the hairless zone of the user under the stimulation paradigm is as follows:

the brain-electrical signal acquisition sensor unit is connected with the human brain in a dry electrode, wet electrode or novel patch electrode mode.

The invention provides a brain-computer interface system and a method for enhancing hairless area electroencephalogram response intensity, wherein the system comprises: the device comprises a screen display interaction unit, an electroencephalogram signal acquisition sensor unit, a signal processing and forwarding unit and a central control unit; the electroencephalogram signal acquisition sensor unit is connected with the signal processing and forwarding unit; the signal processing and forwarding unit is connected with the central control unit; the central control unit is connected with the screen display interaction unit; the electroencephalogram signal acquisition sensor unit is connected to a hairless area of a human brain. According to the invention, the brain-computer interaction is realized by acquiring the brain electrical signal of the hairless area of the user under stimulation, converting the brain electrical signal and transmitting the brain electrical signal to the central control unit, calculating the brain electrical signal subjected to noise reduction pretreatment by the central control unit to obtain corresponding brain-computer interaction information, feeding the interaction corresponding information back to the screen, and updating the stimulation information, and the trouble of the traditional acquisition mode can be reduced. Meanwhile, the BCI is induced visually, so that the signal-to-noise ratio of the BCI can be improved, and the information interaction rate is improved.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a block diagram of a brain-computer interface system for enhancing the EEG response intensity of hairless areas according to the present invention

FIG. 2 is a second system block diagram of the brain-computer interface system for enhancing the EEG response intensity of hairless areas according to the present invention;

FIG. 3 is a schematic diagram of the spatial field coding principle provided by the present invention;

FIG. 4 is a schematic diagram of a stimulation procedure provided by the present invention;

FIG. 5 is a schematic flow chart of a brain-computer interface method for enhancing the EEG response intensity of hairless areas according to the present invention;

fig. 6 is a schematic structural diagram of an electronic device provided in the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The brain-computer interface system for enhancing the brain-computer response intensity of the hairless area of the invention is described below with reference to fig. 1-2, and comprises: the device comprises a screen display interaction unit, an electroencephalogram signal acquisition sensor unit, a signal processing and forwarding unit and a central control unit;

the electroencephalogram signal acquisition sensor unit is connected with the signal processing and forwarding unit;

the signal processing and forwarding unit is connected with the central control unit;

the central control unit is connected with the screen display interaction unit;

the electroencephalogram signal acquisition sensor unit is connected to a hairless area of a human brain.

Specifically, the screen display interaction unit is used for displaying stimulation information to the user, so that the scalp electroencephalogram laterality signal of the user is induced. The electroencephalogram type acquisition sensor unit is used for acquiring the multi-channel scalp electroencephalogram signals without hair zones of the user and transmitting the acquired electroencephalogram signals. The signal processing and forwarding unit is used for receiving the signals collected by the electroencephalogram signal collecting sensor unit, carrying out noise reduction preprocessing on the signals and further transmitting the processed data to the central control unit. And the central control unit calculates the data after the noise reduction pretreatment sent by the signal processing and forwarding unit to obtain the brain-computer interaction response information of the user. And then the obtained interactive response information is transmitted to a screen display interactive unit to update the stimulation signal, so that the user generates a new electroencephalogram signal for the updated data, and then the next cycle is carried out, thereby realizing the interaction between the brain and the machine.

The reason for adopting the hairless zone of the human brain refers to the hairless part of the neck, face and behind the ear of the user, and the reason for adopting the hairless zone of the human brain is that the problems that the electroencephalogram cap needs to be worn and the head needs to be washed before use in the prior art scheme can be reduced, and in addition, if the user is a patient and the face is laid upwards, the measurement of the electroencephalogram signal of the occipital bone is more difficult. In the embodiment, the measurement of the electroencephalogram signals can be easily realized by measuring the hairless area of the human brain.

The embodiment is directed to a noninvasive BCI system, the noninvasive BCI mainly analyzes and decodes brain information based on a scalp electroencephalogram (EEG) signal, a brain magnetic signal (MEG) signal or a near infrared blood oxygen signal (FNIRS), and the three modes are noninvasive collection. The acquisition of MEG brain magnetic signals is greatly interfered by a geomagnetic field and the outside, the MEG brain magnetic signals need to be acquired in a strict magnetic shielding environment, and acquisition equipment is expensive, so that the MEG brain magnetic signals cannot move to a life scene. The FNIRS blood oxygen signal is acquired without conductive paste, and the electrode cap is directly worn, so that the spatial resolution is good and the precision is high. However, the real-time property of the change of the blood oxygen saturation is poor, and the user often needs to wait for several seconds to obtain feedback after making corresponding operation. Therefore, the FNIRS can not achieve a faster communication rate in principle, and is not beneficial to the application of the actual scene. Only EEG-based BCI systems have the potential for practical applications, on the one hand the EEG signal is real-time, and on the other hand the EEG has a reasonable spatial accuracy.

Therefore, the whole operation flow of the brain-computer interface system for enhancing the electroencephalogram response intensity of the hairless area in the embodiment is that the screen display interaction unit displays the stimulation signal to the user, and the user can generate the scalp electroencephalogram signal EEG signal after receiving the stimulation signal. Corresponding signals are collected through an electroencephalogram signal collecting sensor arranged in a hairless area of a human brain, then the collected signals are transmitted to a signal processing and forwarding unit, the signal processing and forwarding unit performs noise reduction preprocessing on the received signals and forwards the signals, namely, data after the noise reduction preprocessing are forwarded to a central null value unit, and a central control unit calculates the received data to obtain corresponding brain-computer interaction information. And then updating the content of the screen display unit based on the corresponding information of brain-computer interaction, namely updating the stimulation information provided for the user, thereby realizing brain-computer interaction operation.

In addition, the screen display interaction unit is adopted in the embodiment to provide stimulation information for the user, that is, the stimulation information includes image information, that is, the stimulation mode adopted for the user includes a visual stimulation mode. The existing EEG-BCI can be classified into several types, such as auditory BCI, visual BCI, and motor imagery BCI, according to sensory pathways of input signals. Based on the above various pathways, a number of classical BCI paradigms have emerged. Among them, scalp electroencephalogram BCI based on visual response is very widely concerned due to its characteristics of high induced response signal-to-noise ratio, diversified coding modes, high system information transmission speed, and the like. That is, the stimulation mode adopted in the present embodiment includes visual BCI to improve the signal-to-noise ratio of the evoked response.

The connection mode among all the components or modules in the embodiment of the invention adopts an electric connection mode.

The brain-computer interface system for enhancing the hairless area electroencephalogram response intensity comprises the following components: the device comprises a screen display interaction unit, an electroencephalogram signal acquisition sensor unit, a signal processing and forwarding unit and a central control unit; the electroencephalogram signal acquisition sensor unit is connected with the signal processing and forwarding unit; the signal processing and forwarding unit is connected with the central control unit; the central control unit is connected with the screen display interaction unit; the electroencephalogram signal acquisition sensor unit is connected to a hairless area of a human brain. According to the invention, the brain-computer interaction is realized by acquiring the brain electrical signal of the hairless area of the user under stimulation, converting the brain electrical signal and transmitting the brain electrical signal to the central control unit, calculating the brain electrical signal subjected to noise reduction pretreatment by the central control unit to obtain corresponding brain-computer interaction information, feeding the corresponding brain-computer interaction information back to the screen, and updating the stimulation information, and the trouble of the traditional acquisition mode can be reduced. Meanwhile, the BCI is induced visually, so that the signal-to-noise ratio of the BCI can be improved, and the information interaction rate is improved.

Further, in the implementation of the present invention, the brain-computer interface system for enhancing the electroencephalogram response intensity of the hairless area, provided by the present invention, wherein the central control unit comprises an application stimulation paradigm module and a screen character display interaction system module;

the application stimulation paradigm module and the screen character display interaction system module are connected with the screen display interaction unit.

Specifically, the central control unit comprises an application stimulation paradigm module and an on-screen character display interactive system. The stimulation application paradigm module is used to generate various stimulation paradigms for different stimulation types of users, and is selected according to the application environment and personal characteristics of the users. The screen character display interactive system is used for converting different stimulation paradigms into corresponding character display and transmitting the converted character display mode to the screen display interactive unit for displaying to generate corresponding stimulation for the user. In addition, the screen character display interactive system also receives brain-computer interaction response information obtained by the central control unit after the central control unit calculates the received scalp electroencephalogram signals, updates the display content by using the brain-computer interaction response information, and generates corresponding stimulation to the user by using the updated character information so as to realize brain-computer interaction.

According to the description, the connection relation exists between the application stimulation paradigm and the screen character display interactive system, and the application stimulation paradigm and the screen character display interactive system are connected with the screen display interactive unit, wherein the connection mode is an electric connection mode.

Further, an embodiment of the present invention provides a brain-computer interface system for enhancing hairless brain electrical response intensity, wherein the application stimulation paradigm module includes:

the device comprises a stimulation paradigm module based on a visual field space coding mode, a stimulation paradigm module based on a special picture stimulation sequence mode and/or a stimulation paradigm module based on a sound and special picture combined stimulation sequence mode.

Specifically, the stimulation paradigm for improving the signal-to-noise ratio of the EEG response in a specific hairless zone based on a field-of-view spatial coding is a way of stimulating a user according to a certain difference in human brain responses corresponding to stimuli in different spatial positions in a field of view.

A stimulation paradigm for improving the specific hairless area EEG response signal-to-noise ratio based on a special image stimulation sequence is that according to the processing of the human brain on an image, not only an occipital lobe area but also an area leaning to a temporal lobe and a parietal lobe area are used, and the image with special frequency can stimulate EEG signals of different areas of the human brain.

The stimulation paradigm of improving the specific hairless area EEG response signal-to-noise ratio based on the mode of combining sound and special pictures to stimulate the sequence is that the sound stimulation can be adopted for inducing the response of the temporal lobe hairless area according to the processing of human brain to sound mainly in the temporal lobe cortex, and in addition, the special picture stimulation can also stimulate the corresponding brain electrical signals of the brain area, so the mode of combining sound and picture is adopted for stimulating the user.

With reference to fig. 3, in the brain-computer interface system for enhancing the electroencephalogram response intensity of the hairless area in the embodiment of the present invention, the stimulation paradigm module based on the field-of-view spatial coding mode is used for exciting different electroencephalogram responses of the corresponding human brain based on the stimulation at different spatial positions.

Specifically, there is a certain difference in the human brain response to stimuli at different spatial locations in the visual field. For example, the primary response region for stimulation of the left visual field is located in the right brain region, and the primary response region for stimulation of the right visual field is located in the left brain region. In addition, the response regions corresponding to the stimulation of the upper and lower visual fields also have a certain position difference at the human sulcus. A schematic overview is shown in figure 3.

As can be seen from FIG. 3, stimulation areas at positions 1-8 in the flicker target stimulation visual field correspond to respective areas corresponding to responses of the human brain. And the EEG responses of the different response areas have certain differences in the information transmitted at different positions on the scalp. Based on the above principle, the stimulation paradigm coding is designed in the research and design by adopting a mode of adopting different stimulation parameters at different positions in a spatial field (the stimulation parameters can be coding of multiple frequencies, single frequencies, phases and the like). By acquiring electroencephalogram signals of a user for several minutes in advance, the superposition characteristics of the user in a specific region under different stimulation combinations are analyzed, corresponding stimulation parameters are optimized finally, and superposition enhancement of response of the specific target region is achieved.

With reference to fig. 4, in the brain-computer interface system for enhancing the electroencephalogram response intensity of the hairless area provided by the embodiment of the present invention, the stimulation module based on the special image stimulation sequence mode is used for inducing the electroencephalogram response of the occipital lobe area, the temporal lobe-temporal lobe area and the parietal lobe area of the human brain based on the processing of the special image.

Specifically, the human brain processes the image using not only the occipital lobe region but also the temporal lobe-biased region and parietal lobe region. For example, when dealing with 6Hz human face stimuli, there is a strong 6Hz response in the temporal cortex. And the human brain will have a special evoked response to a particular picture in the rapid stimulation sequence. Therefore, based on the principle, the study designs a specific rapid picture stimulation sequence to induce the electroencephalogram response of a hairless area near the temporal lobe and realize the enhancement of the response of a specific target area. A specific rapid stimulus sequence consists of rapidly presented pictures, which is schematically shown in fig. 3, wherein the stimulus sequence consists of a start cue, a pre-stimulus and a picture sequence, wherein the pre-stimulus is present across the picture sequence, and the pre-stimulus precedes the picture sequence. The time length of the beginning prompt is 500ms, the time length of each pre-stimulation is 10ms, and the time length of each picture sequence is 3-5 s.

In order to better induce the response of the hairless area, images of human faces, automobiles and the like are added into the stimulation sequence and are presented according to a certain frequency. In this manner, a stronger EEG response than the standard light stimulation paradigm may be induced at a particular hairless zone location.

Further, in the brain-computer interface system for enhancing the electroencephalogram response strength of the hairless area provided in the embodiment of the present invention, the stimulation paradigm module based on the mode of the sound and special image combined stimulation sequence is used for inducing the electroencephalogram response of the temporal lobe cortex based on the processing of the human brain to the sound and inducing the electroencephalogram response of the occipital lobe area, the temporal lobe biased area and the parietal lobe area based on the processing of the human brain to the special image so as to achieve the purpose of inducing the congruent response of the specific area of the human brain.

Specifically, the human brain processes sound mainly in the temporal cortex, and sound stimulation is a good choice for inducing the response of the hairless area of the temporal lobe. But the number of targets which can be coded by the evoked response of the single sound stimulation is limited, so that the specific rapid picture stimulation sequence is combined with the sound stimulation to realize the combined coding, and the electroencephalogram response of the temporal lobe hairless area is improved. The application mode is that a specific rapid picture stimulation sequence is given while the user is stimulated by sound, namely, the superposition response of the joint coding can be generated in a specific hairless area, and finally the response signal-to-noise ratio of the area is improved.

Furthermore, the electroencephalogram signal acquisition sensor unit in the embodiment of the invention is connected with the human brain in a dry electrode, wet electrode or novel patch electrode mode.

Specifically, the existing brain-computer interaction technical scheme requires that a user wears an electroencephalogram cap, applies conductive paste, washes hair before and after use, and has low response signal-to-noise ratio of the original stimulation paradigm in a hairless area.

In the embodiment of the invention, the problems that an electroencephalogram cap needs to be worn and the head is washed before and after the use in the prior technical scheme are solved by designing the stimulation paradigm and the collection system of the hairless area. When the system is used, the target area is wiped by adopting alcohol or clean water in advance, and the electrodes can adopt patch electrodes, so that the system is convenient to use.

Further, referring to fig. 5, an embodiment of the present invention provides a brain-computer interface method for enhancing a hairless area electroencephalogram response strength, including:

step 100: providing a stimulation paradigm to a user;

a stimulation paradigm is selected and then converted into a user-recognizable stimulation form, such as a voice stimulus, a visual stimulus, and the like.

Step 200: acquiring corresponding electroencephalogram signals of the hairless area of the user under the stimulation paradigm;

the electroencephalogram detection device is arranged in hairless areas of the head of a user, such as the face, the neck, the back of the ear and the like, and is used for receiving electroencephalogram signals generated by the user in different stimulation modes under the stimulation paradigm.

Step 300: and carrying out noise reduction pretreatment on the electroencephalogram signal to obtain the electroencephalogram signal subjected to noise reduction treatment. The noise reduction step comprises 2-80 Hz band-pass filtering, 50Hz notch and Independent Component Analysis (ICA) eye charge removal which is researched in advance. In addition, if the myoelectric component of the current data segment is detected to be too strong (usually, the signal energy spectrum is far higher than that of the normal electroencephalogram signal), the signal of the segment is not subjected to subsequent processing, and a subsequent signal acquisition is waited;

step 400: further processing the electroencephalogram signals subjected to noise reduction preprocessing to obtain brain-computer interaction response information;

and calculating the preprocessed hair-free area multi-channel scalp electroencephalogram signals to obtain brain-computer interaction response information of the user. The calculation method adopted is different according to different stimulation paradigms. And (3) performing projection correlation on the steady-state visual evoked stimulus by adopting a spatial filtering method and a template of a stimulus signal, and finally judging the stimulus response based on the obtained correlation coefficient. And for the novel image stimulation, overlapping a plurality of data, judging the occurrence time point of the evoked response, and carrying out verification on the obtained time point and the stimulation time coding sequence so as to obtain the final response result. The electrical brain response processing for sound stimulation is similar to image stimulation, except that the commonly applied electrical brain response lead region is more biased to the temporal lobe. Further, according to evoked responses of different stimulus sources of the visual field, the optimal superposition mode of the visual field in the hairless area is analyzed by adopting a multivariate correlation method, and the optimal superposition parameter combination of the multisource stimulus is obtained.

Step 500: and updating the stimulation paradigm based on the brain-computer interaction response information, thereby realizing a customized paradigm for enhancing brain-computer interaction response in hairless areas.

And updating the stimulation information displayed to the user in the step 100 by the calculated brain-computer interaction response information of the user so as to obtain new stimulation information to the user, and sequentially feeding back and adjusting the mode to realize brain-computer interaction.

Further, the invention provides a brain-computer interface method for enhancing hairless brain electrical response intensity, wherein the stimulation paradigm comprises:

a stimulation paradigm based on a mode of field-of-view spatial coding, a mode of special picture stimulation sequence, and/or a mode of sound and special picture joint stimulation sequence.

Specifically, the stimulation paradigm for improving the signal-to-noise ratio of the EEG response in a specific hairless zone based on a field-of-view spatial coding is a way of stimulating a user according to a certain difference in human brain responses corresponding to stimuli in different spatial positions in a field of view.

A stimulation paradigm for improving the specific hairless area EEG response signal-to-noise ratio based on a special image stimulation sequence is that according to the processing of the human brain on an image, not only an occipital lobe area but also an area leaning to a temporal lobe and a parietal lobe area are used, and the image with special frequency can stimulate EEG signals of different areas of the human brain.

The stimulation paradigm of improving the specific hairless area EEG response signal-to-noise ratio based on the mode of combining sound and special pictures to stimulate the sequence is that the sound stimulation can be adopted for inducing the response of the temporal lobe hairless area according to the processing of human brain to sound mainly in the temporal lobe cortex, and in addition, the special picture stimulation can also stimulate the corresponding brain electrical signals of the brain area, so the mode of combining sound and picture is adopted for stimulating the user.

Further, the present invention provides a brain-computer interface method for enhancing the brain-computer response intensity of the hairless zone, wherein the manner of acquiring the corresponding brain electrical signal of the hairless zone of the user in the stimulation paradigm is as follows:

the brain-electrical signal acquisition sensor unit is connected with the human brain in a dry electrode, wet electrode or novel patch electrode mode.

Specifically, the existing brain-computer interaction technical scheme requires that a user wears an electroencephalogram cap, applies conductive paste, washes hair before and after use, and has low response signal-to-noise ratio of the original stimulation paradigm in a hairless area.

In the embodiment of the invention, the problems that an electroencephalogram cap needs to be worn and the head is washed before and after the use in the prior technical scheme are solved by designing the stimulation paradigm and the collection system of the hairless area. When the system is used, the target area is wiped by adopting alcohol or clean water in advance, and the electrodes can adopt patch electrodes, so that the system is convenient to use.

Fig. 6 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 6: a processor (processor)610, a communication Interface (Communications Interface)620, a memory (memory)630 and a communication bus 640, wherein the processor 610, the communication Interface 620 and the memory 630 communicate with each other via the communication bus 640. The processor 610 may invoke logic instructions in the memory 630 to perform a brain-computer interface method of enhancing hairless brain electrical response intensity, the method comprising: providing a stimulation paradigm to a user; acquiring corresponding electroencephalogram signals of the hairless area of the user under the stimulation paradigm; preprocessing the electroencephalogram signal to obtain a preprocessed electroencephalogram signal; analyzing the preprocessed electroencephalogram signals to obtain brain-computer interaction response information; and updating the stimulation paradigm based on the brain-computer interaction response information, thereby realizing a customized paradigm for enhancing brain-computer interaction response in hairless areas.

In addition, the logic instructions in the memory 630 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In another aspect, the present invention also provides a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, which when executed by a computer, enable the computer to perform a brain-computer interface method for enhancing hairless brain electrical response intensity provided by the above methods, the method comprising: providing a stimulation paradigm to a user; acquiring corresponding electroencephalogram signals of the hairless area of the user under the stimulation paradigm; carrying out noise reduction pretreatment on the electroencephalogram signal to obtain an electroencephalogram signal subjected to noise reduction pretreatment; processing the electroencephalogram signals subjected to noise reduction preprocessing to obtain brain-computer interaction response information; and updating the stimulation paradigm based on the brain-computer interaction response information, thereby realizing a customized paradigm for enhancing brain-computer interaction response in hairless areas.

In yet another aspect, the present invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program, which when executed by a processor, implements a method for enhancing hairless brain-computer interface response intensity provided above, the method comprising: providing a stimulation paradigm to a user; acquiring corresponding electroencephalogram signals of the hairless area of the user under the stimulation paradigm; carrying out noise reduction pretreatment on the electroencephalogram signal to obtain an electroencephalogram signal with noise reduction prognosis; processing the noise-reduced and prognostic electroencephalogram signals to obtain brain-computer interaction response information; and updating the stimulation paradigm based on the brain-computer interaction response information, thereby realizing a customized paradigm for enhancing brain-computer interaction response in hairless areas.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.