CN210428358U

CN210428358U - VR device based on brain signal control

Info

Publication number: CN210428358U
Application number: CN201921385711.XU
Authority: CN
Inventors: 房晓溪
Original assignee: Hebei Xiong'an Wanwang Technology Co Ltd
Current assignee: Hebei Xiong'an Wanwang Technology Co Ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-04-28
Anticipated expiration: 2029-08-23

Abstract

The utility model relates to a VR device based on brain signal control, which comprises an electroencephalogram reading helmet, an electroencephalogram reading, amplifying and converting module, VR vision glasses and a VR3D stereo earphone; VR vision glasses are fixed at the front end of the electroencephalogram signal reading helmet, and VR3D stereo earphones are movably connected to the two sides of the helmet; the electroencephalogram signal reading helmet comprises a head-mounted device and a plurality of electrodes; the head-mounted device comprises fixing belts connected with each other and a fixing frame for fixing VR vision glasses and VR3D stereo earphones; the plurality of electrodes are fixed on the inner side surface of the head-mounted device, and a pressing device for assisting the electrodes to be attached to the scalp is arranged between the plurality of electrodes and the inner side surface of the head-mounted device; the electroencephalogram signal reading, amplifying and converting module is fixed and installed in the head-wearing device and is in communication connection with the electrodes. The utility model discloses degree of automation is high, can realize controlling of VR virtual world through brain electrical signal, does not receive restriction such as region, has driven the scientific and technological progress.

Description

VR device based on brain signal control

Technical Field

The utility model discloses virtual control technical field especially relates to a VR device based on brain signal control.

Background

The virtual display technology is that a real world is virtualized by a computer or a mobile terminal and the like, and the virtual world is projected to human eye retinas by a display screen and a visual system. The essence of the method is that the visual angle of a user is taken as a main body, and objects in a three-dimensional space can be observed in real time without limit, so that the immersion experience is provided for the user. The virtual display technology is widely applied to multiple fields of entertainment, military training, medical training, three-dimensional virtual product display and the like.

In use, users typically view realistic pictures produced by virtual reality technology, such as VR glasses, with head-mounted display products. VR glasses, which may also be referred to as virtual reality glasses, may provide a 360 degree immersive visual experience to the wearer.

However, the existing VR devices are operated by external auxiliary machinery, and users need to operate the VR devices in a limited space, which causes inconvenience and even great personal injury.

Therefore, a need exists in the art for a brain signal control-based VR device that has a high degree of automation, can implement control of a VR virtual world through electroencephalogram signals, and is not limited by regions and the like, so as to overcome the above difficulties.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a degree of automation is high, can realize controlling of VR virtual world through brain electrical signal, does not receive the VR device based on brain signal control of restriction such as region.

In order to achieve the purpose, the utility model adopts the following technical scheme that the VR device based on brain signal control comprises an electroencephalogram reading helmet, an electroencephalogram reading, amplifying and converting module, VR vision glasses and a VR3D stereo earphone;

the VR visual glasses are fixed at the front end of the electroencephalogram signal reading helmet, and the VR3D stereo earphones are movably connected to the two sides of the electroencephalogram signal reading helmet;

the electroencephalogram signal reading helmet comprises a head-mounted device and a plurality of electrodes; the head-mounted device comprises fixing belts connected with each other and a fixing frame used for fixing the VR vision glasses and the VR3D stereo earphones;

a plurality of elastic fabric belts are arranged on the surface of the inner side of the head-wearing device and connected with the inner side of the head-wearing device in a transverse and longitudinal interweaving mode to form a grid shape;

the electrodes are fixed on the elastic fabric belt, and a pressing device for assisting the electrodes to be attached to the scalp is arranged between the electrodes and the inner side surface of the head-mounted device;

the electroencephalogram signal reading, amplifying and converting module is fixed in the head-mounted device and is in communication connection with the plurality of electrodes.

The utility model discloses can utilize EEG signal to read helmet, EEG signal to read enlarged conversion module and realize realizing the listening to the brain skin signal of telecommunication, read the helmet area with EEG signal when using overhead, the push down device can make electrode and scalp fully contact, and the electrode passes through brain activity signal and reads enlarged conversion module generation instruction through EEG signal, and then controls the operation in the VR device.

The utility model overcomes the inconvenient swiftly and the local limitation that current outside supplementary setting used, the utility model discloses degree of automation is high, can realize controlling of VR virtual world through EEG signal, does not receive restriction such as region, and in amusement, military training, a plurality of fields such as medical training, the three-dimensional virtual show of product have substantive change, have driven scientific and technological progress.

Furthermore, the electroencephalogram signal reading, amplifying and converting module comprises unipolar signal amplifiers, bipolar signal amplifiers and AD converters, the ratio of the unipolar signal amplifiers to the bipolar signal amplifiers is 6:1-10:1, the AD converters are connected with only 1 unipolar signal amplifier or bipolar signal amplifier, and one unipolar signal amplifier or bipolar signal amplifier is connected with only 1 electrode.

By adopting the technical scheme, the utility model discloses a unipolar signal amplifier, bipolar signal amplifier want cooperation can further improvement EEG signal's collection scope, more meticulous instruction of distinguishing EEG signal to unipolar signal amplifier with bipolar signal amplifier ratio is 6:1-10:1 can constitute effectual unipolar and bipolar cooperation jointly, can further improve spatial resolution, make its magnified brain signal more accurate.

Furthermore, the input end of the unipolar signal amplifier is a pair diode, and the output end of the unipolar signal amplifier is an operational amplifier of precise pico-ampere-level input current;

the current of the bipolar signal amplifier is 1.3mA, the input offset is 50uV, the input bias current is 1nA, the CMRR is 100dB, and the input noise is 0.28 uV;

the resolution of the AD converter is 22 bits, the dynamic range is 105dB, and the nonlinearity is +/-0.003%.

Adopt above-mentioned technical scheme, the utility model discloses a unipolar amplifies and adopts cophase amplification structure, and this structure has high input impedance. The structure is simple, the parameter consistency is easy, the software difference is easy to carry out, and the common mode rejection ratio is improved.

The input end adopts a pair diode, so that static electricity can be effectively resisted, a precise pico-ampere input current amplifier is protected from being damaged by static electricity, and the amplification factor can reach 19 times. The bipolar amplification adopts a classical instrument amplifier, the circuit is classical, an AD chip is adopted, and the implementation is easy.

The AD chip has the characteristics that: low power consumption: 1.3mA, input offset: 50uV, input bias current: InA, CMRR: 100 dB. Inputting noise: 0.28uV, the magnification can reach 10 times.

Furthermore, the electroencephalogram signal reading, amplifying and converting module further comprises a main control module, a USB data transmission module and a filtering processing module;

the main control module comprises a first microprocessor and a second microprocessor, the first microprocessor is connected with the AD converter, the second microprocessor is connected with the first microprocessor, and a magnetic coupling isolator is arranged between the second microprocessor and the first microprocessor;

the receiving end of the USB data transmission module is connected with the second microprocessor, and the output end of the USB data transmission module is connected with the filtering processing module.

Adopt above-mentioned technical scheme, the utility model discloses first microprocessor receives AD converter's brain electricity digital signal, sends the brain electricity digital signal who receives for second microprocessor through the magnetic coupling isolator afterwards, and USB data transmission module receives the brain electricity digital signal of second microprocessor output to filtering processing module transmission, filtering processing module set up two kinds of wave filters of first order high pass, second order low pass and carry out the filtering to the brain electricity signal data of gathering, accomplish brain electricity signal's enlarged function, and then generate the control command to the VR device.

Furthermore, the VR visual glasses comprise an LED display used for displaying an initial image, an image processor used for preprocessing the initial image displayed by the LED display to obtain a first image, a lens used for focusing the first image and then forming a second image on the retina of a human eye, and a shell;

the LED display is in a curved surface arc shape, and the radian of the curved surface of the LED display faces the direction of the lens;

the LED display and the image processor are arranged inside the shell, one side of the shell, which is close to human eyes, is provided with a lens mounting hole, and the lens is mounted in the lens mounting hole.

By adopting the technical scheme, the utility model discloses a fixed VR glasses body and people's eye position, wherein, VR glasses body adopts the LED display of curved surface display screen to show initial image, and obtains first image after coming to carry out the preliminary treatment to the initial image that LED display shows through image processor; finally, the first image is focused onto a retina of a human eye using a lens. The utility model discloses a LED display is under the condition that does not change VR glasses body space and lens parameter, has expanded the field of view angle of VR glasses, has promoted the effect of immersing of VR glasses. In addition, when the LED display adopting the curved surface display screen displays the initial image, the distortion effect of the image through the lens is partially counteracted, the operation complexity of the image processor is reduced to a certain extent, the power consumption of equipment is reduced, the heat is generated, the comfort of a user is increased, the immersion effect of the depth can be acted, the generation of reactive brain waves by the user is facilitated, and the control on the VR device is convenient to realize.

Further, the VR3D stereo headphone comprises a headphone shell and a sound generating device, wherein the sound generating device comprises a small tweeter and a large woofer;

and the two loudspeakers of the high pitch small loudspeaker and the low pitch large loudspeaker are connected in parallel.

Furthermore, the earphone shell comprises an earphone front shell and an earphone rear shell; the earphone front shell and the earphone rear shell form an asymmetric cavity; a small loudspeaker bracket is arranged on the front shell of the earphone, and the high pitch small loudspeaker is arranged on the small loudspeaker bracket; the earphone is characterized in that a loud speaker mounting lug is arranged on the inner wall of the earphone rear shell, and the low-pitch loud speaker is arranged on the mounting lug.

Adopt above-mentioned technical scheme, the utility model discloses a high bass effect of earphone has concurrently, the range is wide, tone quality is good, and the stereovision is strong, and the high-fidelity stereo effect that the distortion is little further increases the immersive experience effect of VR device.

Furthermore, the pressing device comprises an air bag, an air pump and a contact detector, wherein the input end of the contact detector is connected with the electroencephalogram signal reading, amplifying and converting module, the output end of the contact detector is connected with the air pump, the output end of the air pump is connected with the air bag, and the air bag is arranged at one end, away from the electrode measuring point, of the electrode.

Adopt above-mentioned technical scheme, the utility model discloses utilize to push down the device and can make electrode contact scalp better, more do benefit to and collect EEG signal.

Furthermore, shielding conductive paint is sprayed on the surface of the shell of the electroencephalogram reading helmet; or the outer surface of the shell of the electroencephalogram signal reading helmet is covered with a densely woven flexible metal mesh.

By adopting the technical scheme, the utility model is characterized in that the shielding conductive paint is sprayed on the surface of the shell of the electroencephalogram reading helmet so as to shield the external electromagnetic radiation interference; or the outer surface of the shell of the electroencephalogram signal reading helmet is covered with a tightly woven flexible metal mesh for shielding external electromagnetic radiation interference.

Drawings

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

Fig. 1 is a schematic diagram of the whole structure of the VR device based on brain signal control according to the present invention;

fig. 2 is a schematic diagram of an electrical connection structure of a VR device electroencephalogram signal reading, amplifying and converting module based on brain signal control according to the present invention;

fig. 3 is a schematic structural view of VR vision glasses of the VR device based on brain signal control according to the present invention;

fig. 4 is the utility model discloses VR3D stereo headphone structure sketch map of VR device based on brain signal control.

Wherein, in the figure: 1 is the brain electrical signal and reads the helmet, 11 is the head-mounted device, 12 is the electrode, 111 is the fixed band, 101 is the elastic fabric area, 2 is brain electrical signal and reads the conversion module that enlargies, 3 is VR vision glasses, 31 is the LED display, 32 is image processor, 33 is the lens, 34 is the shell, 4 is VR3D stereo headphone, 41 is the earphone casing, 411 is the preceding shell of earphone, 412 is the earphone backshell, 42 is sound generating mechanism, 421 is the loudspeaker of high pitch, 422 is the loudspeaker of low pitch.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature "under," "below," and "beneath" a second feature includes a first feature that is directly under and obliquely below the second feature, or that simply means that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 and 3: the utility model adopts the following technical scheme that the VR device based on brain signal control comprises an electroencephalogram reading helmet 1, an electroencephalogram reading, amplifying and converting module 2, VR vision glasses 3 and a VR3D stereo earphone 4;

VR vision glasses 3 are fixed at the front end of the electroencephalogram signal reading helmet 1, and VR3D stereo earphones 4 are movably connected to the two sides of the electroencephalogram signal reading helmet 1;

the electroencephalogram signal reading helmet 1 includes a head-mounted device 11 and a plurality of electrodes 12; the head-mounted device 11 includes a fixing band 111 and a fixing frame for fixing the VR vision glasses 3 and the VR3D stereo headphones 4, which are connected to each other;

a plurality of elastic fabric belts 101 are arranged on the inner side surface of the head-wearing device 11, and the elastic fabric belts 101 are connected with the inner side of the head-wearing device 11 in a transverse and longitudinal interweaving mode to form a grid shape;

a plurality of electrodes 12 are fixed on the elastic fabric belt 101, and a pressing device for assisting the electrodes 12 to be attached to the scalp is arranged between the electrodes 12 and the inner side surface of the head-mounted device 11;

the electroencephalogram signal reading, amplifying and converting module 2 is fixed inside the head-mounted device 11 and is in communication connection with the plurality of electrodes 12.

This embodiment type can utilize brain electrical signal to read helmet 1, brain electrical signal to read and amplify conversion module 2 and realize listening to the brain skin signal of telecommunication, with brain electrical signal read helmet 1 area on the head when using, the device of pushing down can make electrode 12 fully contact with the scalp, electrode 12 passes through brain activity signal and reads the amplification conversion module 2 through brain electrical signal and generate the instruction, and then the operation in the control VR device.

The embodiment overcomes the inconvenience and limitation of the existing external auxiliary setting, has high automation degree, can realize the control of the VR virtual world through electroencephalogram signals, is not limited by regions and the like, has substantial change in multiple fields such as entertainment, military training, medical training, three-dimensional virtual product display and the like, and drives scientific and technological progress.

In this embodiment, the electroencephalogram signal reading, amplifying and converting module 2 includes a unipolar signal amplifier, a bipolar signal amplifier and an AD converter, the ratio of the unipolar signal amplifier to the bipolar signal amplifier is 6:1-10:1, the AD converter is connected with and only connected with 1 unipolar signal amplifier or bipolar signal amplifier, and one unipolar signal amplifier or bipolar signal amplifier is connected with and only connected with 1 electrode 12.

In this embodiment, the input end of the unipolar signal amplifier is a pair of diodes, and the output end is an operational amplifier of a precise pico-amp-level input current;

the resolution of the AD converter is 22bit, the dynamic range is 105dB, and the nonlinearity is ± 0.003%.

By adopting the technical scheme, the unipolar amplification of the embodiment adopts the in-phase amplification structure, and the structure has high input impedance. The structure is simple, the parameter consistency is easy, the software difference is easy to carry out, and the common mode rejection ratio is improved.

In this embodiment, the electroencephalogram signal reading, amplifying and converting module 2 further comprises a main control module, a USB data transmission module and a filtering processing module;

By adopting the technical scheme, the first microprocessor of the embodiment receives the electroencephalogram digital signal of the AD converter, then sends the received electroencephalogram digital signal to the second microprocessor through the magnetic coupling isolator, the USB data transmission module receives the electroencephalogram digital signal output by the second microprocessor and transmits the electroencephalogram digital signal to the filtering processing module, and the filtering processing module is provided with a first-order high-pass filter and a second-order low-pass filter to filter the acquired electroencephalogram data, so that the electroencephalogram signal amplification function is completed, and further, a control instruction for the VR device is generated.

In particular, the advantages of the unipolar signal amplifier and the bipolar signal amplifier in the present embodiment

Theoretically, if there is a zero potential point on the body (electrically, the ground is set as the zero potential point) and the point is connected to the probe electrode on the scalp, the measured potential difference is the absolute value of the change in the bioelectrical potential of the brain under the probe electrode. In practice, this point is not possible on the human body, so the two lobes, which are furthest from the brain and are least affected by other bioelectricity, are used as the envisaged points of relatively zero potential for the placement of electrodes, called indifferent or reference electrodes, and probe or active electrodes.

In general, when a unipolar lead is combined, the active electrode is connected to G1 as the negative electrode, and the indifferent electrode is the positive electrode.

The connecting method of the monopole conduction method comprises the following steps:

①, the active electrode of each hemisphere is connected with the electrode of the ear on the same side.

②, the two ear poles are connected to serve as a common reference electrode, and then are connected with the active electrode in a lead.

③ and the two ear electrodes are connected with the ground wire to be used as a common reference electrode and then connected with the movable electrode in a lead.

④, one side ear electrode is used as a common electrode of the two side hemisphere active electrodes.

The monopole conduction method has the characteristics that:

1. the approximate absolute value of the change in the bioelectrical potential of the brain under the active electrode can be recorded.

2. Therefore, the cortical and deep cortical foci generate a wide range of brain waves, and the unipolar lead is easier to find than the bipolar lead.

③, weaker, less localized brain waves are easily masked from detection by larger area, more intense brain bioelectricity due to the larger span between the active and indifferent electrodes.

④, the ear electrode is grounded, so it is easy to generate 50Hz AC interference.

⑤, because the two ear electrodes are close to the temples, the special brain waves in the temples often cause the ear electrodes to be affected by their electric field, resulting in activation of the indifferent electrodes.

The bipole primarily records other physiological information including ECG, EOG, EMG, etc. Physiological signals are weak signals, common mode is serious, and in order to obtain better information, a differential input mode is adopted

Unipolar and bipolar electrode dispensing method

Secondly, the method comprises the following steps: the dispensing method is mainly based on the 10-20 system electrode placement method.

10-20 systems electrode placement, standard electrode placement as defined by the international electroencephalogram society.

①, front and back sagittal lines, wherein a line is drawn from the nasal root to the occipital tuberosity, 5 points are marked on the line from front to back, and the line is named as the frontal pole midpoint (Fpz), the frontal midpoint (Fz), the central point (Cz), the vertex (Pz) and the occipital point (Oz), the distance from the frontal pole midpoint to the nasal root and the distance from the occipital point to the occipital tuberosity are respectively 10% of the total length of the line, and the rest points are all separated by 20% of the total length of the line, which is the source of the 10-20 system name

②, a horizontal position, a connecting line is taken from the anterior point of the left ear (the depression of the zygomatic pedicle in front of the tragus) to the anterior point of the right ear through the central point, the left temporal middle (T3), the right temporal middle (T4), the left central (C3), the right central (C4), the distances between the points of T3 and T4 and the anterior point of the ear are respectively 10% of the total length of the connecting line, and the rest points (including the Cz point) are all separated by 20% of the total length of the connecting line.

The multiple electrode 12 is used to improve the resolution of the multi-lead, and mainly to further improve the spatial resolution and to observe different functions of the brain region in detail. Now, the development has been made to 256 lead or 512 lead.

Multiple leads can be screened, can be freely combined, and different characteristics of signals can be analyzed through addition and subtraction between leads. The tool is various scientific computing software, such as matlab and the like.

The utility model discloses a practicality

1. By arranging the plurality of electrodes 12, the acquisition range of the electroencephalogram signals can be further improved, and the brain area can be observed more carefully.

2. Through set up the magnetic coupling isolator between main control module's first microprocessor and second microprocessor, magnetic isolation not only is faster than optical isolation speed, still has circuit design characteristics such as more succinct, the integrated level is high, low-power consumption.

By adopting the technical scheme, the embodiment adopts the unipolar signal amplifier and the bipolar signal amplifier to be matched, so that the acquisition range of the electroencephalogram signals can be improved, the instructions of the electroencephalogram signals can be distinguished more finely, the ratio of the unipolar signal amplifier to the bipolar signal amplifier is 6:1-10:1, effective unipolar and bipolar combined matching can be formed, the spatial resolution can be improved in the embodiment, and the brain signals amplified by the unipolar signal amplifier and the bipolar signal amplifier are more accurate.

In this embodiment, the VR glasses 3 includes an LED display 31 for displaying an initial image, an image processor 32 for preprocessing the initial image displayed by the LED display to obtain a first image, a lens 33 for focusing the first image and forming a second image on a retina of a human eye, and a housing 34;

the LED display 31 is curved, and the radian of the curved surface faces the direction of the lens 33;

the LED display 31 and the image processor 32 are arranged inside a housing 34, a lens mounting hole is arranged on one side of the housing close to the human eye, and a lens 33 is arranged in the lens mounting hole.

By adopting the technical scheme, the positions of the VR glasses body and the human eyes are fixed, wherein the VR glasses body adopts the LED display 31 of the curved display screen to display the initial image, and the initial image displayed by the LED display 31 is preprocessed by the image processor to obtain the first image; finally, the first image is focused onto a retina of a human eye using a lens. This embodiment type adopts LED display 31, under the condition that does not change VR glasses body space and lens parameter, has expanded the visual field angle of VR glasses, has promoted the effect of immersing of VR glasses. In addition, when the LED display 31 adopting the curved surface display screen displays the initial image, the distortion effect of the image through the lens is partially counteracted, the operation complexity of the image processor is reduced to a certain extent, the power consumption and the heat of the equipment are reduced, the comfort of a user is increased, the immersion effect of the depth can be acted, the generation of reactive brain waves by the user is facilitated, and the control on the VR device is convenient to realize.

In this embodiment, the VR3D stereo headphone 4 includes a headphone housing 41 and a sound generating device 42, where the sound generating device 42 includes a small tweeter 421 and a large woofer 422;

the tweeter 421 and the woofer 422 are connected in parallel.

The earphone housing 41 in this embodiment includes an earphone front shell 411 and an earphone rear shell 412; the front earphone shell 411 and the rear earphone shell 412 form an asymmetric cavity; a small horn bracket is arranged on the earphone front shell 411, and a high pitch small horn 421 is arranged on the small horn bracket; the inner wall of the rear shell of the earphone is provided with a loud speaker mounting lug, and the bass loud speaker 422 is arranged on the mounting lug.

By adopting the technical scheme, the embodiment realizes the high-low sound effect of the earphone, wide range, excellent tone quality, strong layering and small distortion high-fidelity stereo effect, and further increases the immersion type experience effect of the VR device.

In this embodiment, the pressing device includes an air bag, an air pump and a contact detector, an input end of the contact detector is connected to the electroencephalogram signal reading, amplifying and converting module 2, an output end of the contact detector is connected to the air pump, an output end of the air pump is connected to the air bag, and the air bag is disposed at one end of the electrode 12 away from the electrode measuring point.

By adopting the technical scheme, the electrode 12 can be better contacted with the scalp by utilizing the pressing device, and the electroencephalogram signal collection is more facilitated.

In the embodiment, shielding conductive paint is sprayed on the surface of the shell of the electroencephalogram signal reading helmet 1; or the outer surface of the shell of the electroencephalogram signal reading helmet 1 is covered with a dense-woven flexible metal mesh.

By adopting the technical scheme, the shielding conductive paint is sprayed on the surface of the shell of the electroencephalogram signal reading helmet 1 to shield the external electromagnetic radiation interference; or the outer surface of the shell of the electroencephalogram signal reading helmet 1 is covered with a tightly woven flexible metal mesh for shielding external electromagnetic radiation interference.

The utility model discloses when using, control program realizes following step:

A. capturing the head electroencephalogram signals of the wearer through the device to convert software action instructions;

B. the VR device interface is connected with the control software interface in a butt joint mode, and virtual scenes are established and presented on VR visual glasses 3 and a VR3D stereo headset 4;

C. integrating and deploying software hardware, completing joint debugging, and butting an expected action instruction of the electroencephalogram signal with a control instruction of the software;

D. and starting a software process, generating or updating a VR interface according to the EEG signal expected action instruction, and keeping the expected action instruction and the game control instruction synchronous.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present embodiment. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of this embodiment. Thus, the present embodiment is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A VR device based on brain signal control is characterized by comprising an electroencephalogram signal reading helmet (1), an electroencephalogram signal reading, amplifying and converting module (2), VR vision glasses (3) and a VR3D stereo earphone (4);

the VR vision glasses (3) are fixed at the front end of the electroencephalogram signal reading helmet (1), and the VR3D stereo earphones (4) are movably connected to the two sides of the electroencephalogram signal reading helmet (1);

the electroencephalogram signal reading helmet (1) comprises a head-mounted device (11) and a plurality of electrodes (12); the head-mounted device (11) comprises a fixing strap (111) and a fixing frame, wherein the fixing strap is connected with the fixing strap and the fixing frame is used for fixing the VR vision glasses (3) and the VR3D stereo earphones (4);

a plurality of elastic fabric belts (101) are arranged on the inner side surface of the head-mounted device (11), and the elastic fabric belts (101) are connected with the inner side of the head-mounted device (11) in a transverse and longitudinal interweaving mode to form a grid shape;

the electrodes (12) are fixed on the elastic fabric belt (101), and a pressing device for attaching the auxiliary electrodes (12) to the scalp is arranged between the electrodes (12) and the inner side surface of the head-mounted device (11);

the electroencephalogram signal reading, amplifying and converting module (2) is fixed inside the head-mounted device (11) and is in communication connection with the plurality of electrodes (12).

2. The VR device based on brain signal control of claim 1, wherein the brain signal reading, amplifying and converting module (2) comprises a unipolar signal amplifier, a bipolar signal amplifier and an AD converter, the ratio of the unipolar signal amplifier to the bipolar signal amplifier is 6:1-10:1, the AD converter is connected with and only connected with 1 unipolar signal amplifier or 1 bipolar signal amplifier, and one unipolar signal amplifier or one bipolar signal amplifier is connected with and only connected with 1 electrode (12).

3. The VR device of claim 2 wherein the brain signal based controls are configured to generate a signal based on the brain signals,

the input end of the unipolar signal amplifier is a pair of diodes, and the output end of the unipolar signal amplifier is an operational amplifier of precise pico-ampere-level input current;

4. The VR device based on brain signal control of claim 2, wherein the brain electrical signal reading, amplifying and converting module (2) further comprises a main control module, a USB data transmission module and a filtering processing module;

5. The VR device of claim 1, wherein the VR vision glasses (3) include an LED display (31) for displaying an initial image, an image processor (32) for preprocessing the initial image displayed by the LED display (31) to obtain a first image, a lens (33) for focusing the first image to form a second image on a retina of a human eye, and a housing (34);

the LED display (31) is in a curved surface arc shape, and the radian of the curved surface of the LED display faces to the direction of the lens (33);

the LED display (31) and the image processor (32) are arranged inside the shell (34), one side of the shell, which is close to human eyes, is provided with a lens mounting hole, and the lens (33) is mounted in the lens mounting hole.

6. The brain signal control-based VR device of claim 1 wherein the VR3D stereo headphones (4) include a headphone housing (41) and a sound generating device (42), the sound generating device (42) including a tweeter (421) and a woofer (422);

and the high pitch small loudspeaker (421) and the low pitch large loudspeaker (422) are connected in parallel.

7. The VR device of claim 6, wherein the earphone housing (41) comprises an earphone front shell (411) and an earphone rear shell (412); the earphone front shell (411) and the earphone rear shell (412) form an asymmetric cavity; a small loudspeaker bracket is arranged on the earphone front shell (411), and the high pitch small loudspeaker (421) is arranged on the small loudspeaker bracket; the earphone is characterized in that a loud speaker mounting lug is arranged on the inner wall of the earphone rear shell, and the low-pitch loud speaker (422) is arranged on the mounting lug.

8. The VR device of any one of claims 1 to 7, wherein the pressing device comprises an air bag, an air pump and a contact detector, an input end of the contact detector is connected to the EEG reading, amplifying and converting module (2), an output end of the contact detector is connected to the air pump, an output end of the air pump is connected to the air bag, and the air bag is disposed at one end of the electrode (12) away from a measuring point of the electrode.

9. The VR device based on brain signal control of claim 8, wherein the surface of the shell of the brain signal reading helmet (1) is coated with shielding conductive paint; or the outer surface of the shell of the electroencephalogram signal reading helmet (1) is covered with a dense-woven flexible metal mesh.