CN106970712B - Multifunctional human brain computer interface helmet - Google Patents
Multifunctional human brain computer interface helmet Download PDFInfo
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- CN106970712B CN106970712B CN201710301183.4A CN201710301183A CN106970712B CN 106970712 B CN106970712 B CN 106970712B CN 201710301183 A CN201710301183 A CN 201710301183A CN 106970712 B CN106970712 B CN 106970712B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
- G06F3/012—Head tracking input arrangements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
- G06F3/015—Input arrangements based on nervous system activity detection, e.g. brain waves [EEG] detection, electromyograms [EMG] detection, electrodermal response detection
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/01—Indexing scheme relating to G06F3/01
- G06F2203/012—Walk-in-place systems for allowing a user to walk in a virtual environment while constraining him to a given position in the physical environment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention relates to a multifunctional human brain computer interface helmet, which is technically characterized in that: the system comprises a cortex electric signal reading unit and a cortex magnetic signal writing unit; the cortex electric signal reading unit comprises an ultramicro scalp electrode array, a miniature multichannel signal amplifier, a miniature multichannel analog-to-digital converter and a signal transmitter which are connected in sequence; the cortical magnetic signal writing unit is composed of a plurality of stereotactic magnetic heads positioned in the helmet shell. The invention combines the cortex electric signal reading unit and the cortex magnetic signal writing unit together, realizes the signal reading function of human brain information to a computer, can transfer the information from the computer to the brain in a noninvasive mode and act on nerve cells, realizes the bidirectional data interaction of the human brain and peripheral equipment, and can be widely applied to rehabilitation and life assistance of limbs movement and limbs sensory dysfunction crowd caused by the damage of a nervous system; the method can also be applied to the fields of interaction of human brain on computer application programs, games and the like, robot (operating and controlling and the like.
Description
Technical Field
The invention belongs to the technical fields of electromagnetic technology and nerve electrophysiology, in particular to a multifunctional human brain computer interface helmet.
Background
The human brain computer interface has become the subject of extensive worldwide research, and how to simply and effectively obtain high-precision and real-time human brain electrical signals has become one of important contents of research. The current method for accurately obtaining the human brain electrical signals is usually invasive, such as applying or implanting a microelectrode array on a certain area of the surface of the cerebral cortex in a surgical mode, the method is mostly in an experimental stage, and human brain surgery has risks and is difficult to be accepted and popularized by people. The method for acquiring the brain electrical signals by mounting the scalp electrode on the surface of the scalp is widely applied to medical examination and medical experiments by people, but the existing scalp electrode has the problems of large volume, single structural material, complex mounting method, poor electromagnetic shielding effect and the like, and the number and density of the electrodes which can be mounted on the surface of the scalp are low, so that finer brain electrical signals cannot be acquired.
The research of human brain computer interfaces is limited to the research of unidirectional interfaces from human brain information to computers at present. However, the research and practical application of how to transfer information from computer to brain and act on nerve cells in a non-invasive way are almost blank, and the related research and application are mostly invasive, such as high-end artificial vision is realized by implanting electrodes on the surface of visual cortex of brain, but the methods are invasive and have great risks. The study of how to non-invasively impart artificial sensations into and interact with the brain remains blank.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a multifunctional human brain computer interface helmet, and solves the problems that a scalp electrode cannot finely acquire brain signals and human brain bidirectional information interaction is solved.
The invention solves the technical problems by adopting the following technical scheme:
a multifunctional human brain computer interface helmet comprises a helmet shell, wherein a cortex electric signal reading unit and a cortex magnetic signal writing unit are arranged on the helmet shell; the cortex electric signal reading unit comprises an ultramicro scalp electrode array, a miniature multichannel signal amplifier, a miniature multichannel analog-to-digital converter and a signal transmitter which are sequentially connected, wherein the ultramicro scalp electrode array is arranged in a helmet array slot and can move up and down in the helmet array slot, the miniature multichannel signal amplifier, the miniature multichannel analog-to-digital converter and the signal transmitter are arranged in a helmet shell and are summarized to a helmet data line through an internal cable, and the ultramicro scalp electrode array is positioned on the surface of a scalp corresponding to a brain cortex body movement center; the cortex magnetic signal writing unit consists of a plurality of stereotactic magnetic heads positioned in the helmet shell, connecting wires of each stereotactic magnetic head are gathered to a helmet data wire, and the stereotactic magnetic head array is positioned on the surface of the scalp corresponding to the brain cortex somatosensory center.
The helmet shell is made of elastic non-conductive materials, and the inner surface of the helmet shell is tightly adhered to the surface of the scalp and covers the scalp corresponding to the somatic motor center of the cerebral cortex and the somatic motor sensory center.
The ultra-micro scalp electrode array consists of an ultra-micro scalp electrode array module and a group of ultra-micro scalp electrodes of which the main body is arranged in the ultra-micro scalp electrode array module; the ultra-micro scalp electrode comprises an ultra-micro scalp electrode head, an ultra-micro scalp electrode body, an ultra-micro scalp electrode tail, an electrode wire and a spring, wherein the ultra-micro scalp electrode body is arranged on the ultra-micro scalp electrode head, one end of the ultra-micro scalp electrode tail is connected with the ultra-micro scalp electrode body, the other end of the ultra-micro scalp electrode tail is connected with the electrode wire, one end of the electrode wire is connected with the ultra-micro scalp electrode tail, the other end of the electrode wire penetrates through the surface of the ultra-micro scalp electrode array module and is connected with upper equipment to realize a signal transmission function, and the spring is arranged above the ultra-micro scalp electrode tail; the electrode bin is arranged in the ultramicro scalp electrode array module, the tail part of the ultramicro scalp electrode and the spring are arranged in the electrode bin to move up and down, and the lower end of the electrode bin is provided with an electrode sliding hole and communicated with the outside of the ultramicro scalp electrode array module to support and guide the ultramicro scalp electrode body.
The ultra-micro scalp electrode array module is made of hard plastic, and an electromagnetic shielding coating is arranged on the surface of the ultra-micro scalp electrode array module; the head part of the ultra-micro scalp electrode, the body part of the ultra-micro scalp electrode, the tail part of the ultra-micro scalp electrode and the electrode wires are all made of silver materials or copper materials; the head of the ultra-micro scalp electrode is hemispherical, and the surface of the ultra-micro scalp electrode is covered with graphene or platinum materials; the ultra-micro scalp electrode body is in a slender cylindrical shape, and an electromagnetic shielding coating consisting of permalloy or aluminum material is plated on the surface of the ultra-micro scalp electrode body; the tail part of the ultra-micro scalp electrode is in a short cylinder shape, and the diameter of the tail part is larger than that of the head part and the body part of the ultra-micro scalp electrode; the outside of the electrode wire is wrapped with insulating rubber and an electromagnetic shielding layer; the inner wall of the electrode bin is cylindrical, the diameter of the electrode bin is slightly larger than the diameter of the tail part of the ultramicro scalp electrode, the inner wall of the electrode sliding hole is cylindrical, and the diameter of the electrode bin is slightly larger than the diameter of the body part of the ultramicro scalp electrode; each electrode wire of the group of the ultra-micro scalp electrodes is respectively connected with the upper equipment, or each electrode wire of the group of the ultra-micro scalp electrodes is connected with the upper equipment after being communicated.
The three-dimensional directional magnetic head comprises a three-dimensional directional magnetic head shell, a pulse magnetic field coil, a pulse magnetic field guide column, a plurality of magnetic field three-dimensional directional control coils and a magnetic field guide conical ring; the pulse magnetic field guide column is sleeved in the center of the pulse magnetic field coil and the pulse magnetic field coil is arranged at the upper end of the inside of the stereotactic magnetic head shell, the plurality of magnetic field stereotactic control coils are uniformly distributed at the lower end of the inside of the stereotactic magnetic head shell according to a circular shape, and the magnetic field guide conical ring is arranged at the bottom of the stereotactic magnetic head shell.
The pulse magnetic field coils are arranged in the stereotactic magnetic head shell through pulse magnetic field coil support plates, and the magnetic field stereotactic control coils are arranged in the stereotactic magnetic head shell through magnetic field stereotactic control coil support plates; the pulsed magnetic field coil support plate and the magnetic field stereotactic control coil support plate are both made of plastic materials; the three-dimensional directional magnetic head shell is made of a high-permeability material; the pulse magnetic field guide column is made of metal materials, and the lower end of the pulse magnetic field guide column is in an inverted cone shape; the magnetic field guiding conical ring is made of high-permeability materials and is in a shape of an inverted trapezoid circular ring with a wide upper part and a narrow lower part, and the upper inner hole of the circular ring is larger than the lower inner hole; the pulse magnetic field coil is connected with the pulse magnetic field coil control unit through a connecting wire wrapped with an electromagnetic shielding rubber layer; the magnetic field stereotactic control coils are connected with the magnetic field stereotactic control coil control unit through connecting wires wrapped with the electromagnetic shielding rubber layer, and the magnetic field stereotactic control coils are connected in series through the connecting wires wrapped with the electromagnetic shielding rubber layer.
The invention has the advantages and positive effects that:
1. the invention combines the cortex electric signal reading unit and the cortex magnetic signal writing unit, reads the cortex movement signal through the ultramicro scalp electrode array, writes the cortex sense magnetic signal through the stereotactic magnetic head array, not only realizes the signal reading function of human brain information to a computer, but also can transfer the information from the computer to the brain in a noninvasive way and act on nerve cells.
2. The ultra-micro scalp electrode array has small volume and can form an extremely dense array on a unit area, so that the number and the density of the electrodes are extremely high; and the ultra-micro scalp electrode adopts a full electromagnetic shielding design, so that extremely fine and clear brain electrical signals can be obtained noninvasively.
3. The invention establishes two-way neural network connection with human brain, the human brain can directly control the electronic exoskeleton to generate various actions according to the intention of the human brain, and the electronic exoskeleton can be operated stably and balanced by using various methods, thereby realizing two-way data interaction between the human brain and peripheral equipment, and being widely applied to rehabilitation and life assistance of people suffering from limb movement and limb sensory dysfunction caused by nervous system injury; the method can also be applied to the fields of interaction of human brain on computer application programs, games and the like, robot (operating and controlling and the like.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of a cortical electrical signal reading unit;
FIG. 3 is a schematic illustration of the use of a multi-function human brain computer interface helmet;
FIG. 4 is a schematic diagram of the state of the array of ultra-micro scalp electrodes when pressed;
FIG. 5 is a schematic diagram of an array of ultra-micro scalp electrodes acting on a human brain;
FIG. 6 is a schematic diagram of a stereotactic head array acting on a human brain;
FIG. 7 is a schematic diagram of the structure of an array of ultra-micro scalp electrodes;
FIG. 8 is a three-dimensional perspective view of an array of ultra-micro scalp electrodes;
FIG. 9 is a partial cross-sectional view of an array of ultra-micro scalp electrodes in contact with the scalp;
FIG. 10 is a three-dimensional perspective view of a stereotactic head;
FIG. 11 is a schematic cross-sectional view of a stereotactic head generating magnetic lines.
Detailed Description
Embodiments of the invention are described in further detail below with reference to the attached drawing figures:
the multifunctional human brain computer interface helmet is composed of a helmet shell 4, a cortex electric signal reading unit and a cortex magnetic signal writing unit, wherein the cortex electric signal reading unit and the cortex magnetic signal writing unit are arranged on the helmet shell to realize the functions of reading cortex movement signals and writing cortex feeling magnetic signals.
The helmet shell is made of elastic non-conductive materials with certain thickness, and can cover the scalp of the cerebral cortex functional area corresponding to the whole head, and can also be made into scalp of the corresponding cerebral cortex functional area with specific shape for reading the cortical movement signals and writing the cortical sensation magnetic signals. The helmet shell of the embodiment is similar to the English letter C in shape, can be simply worn like a hairpin, and the inner surface of the helmet shell is tightly adhered to the surface of a scalp and covers the scalp corresponding to the somatic motor center of the cerebral cortex and the somatic motor sensory center.
As shown in FIG. 2, the cortex electric signal reading unit comprises an ultramicro scalp electrode array 3-A, a micro multichannel signal amplifier 4-2, a micro multichannel analog-to-digital converter 4-3, a signal transmitter 4-4 and an internal connecting wire. The brain electrical signals collected by the one or more ultramicro scalp electrode arrays 3-A are connected with the miniature multichannel signal amplifier 4-2 through the electrode wires 1-4, the miniature multichannel signal amplifier 4-2 amplifies signals and then transmits the amplified signals to the miniature multichannel analog-to-digital converter 4-3 to convert analog signals into digital signals, the miniature multichannel analog-to-digital converter 4-3 transmits the converted digital signals to the signal transmitter 4-4, and the signal transmitter 4-4 is summarized to the helmet data wire 4-5 through an internal cable to be connected with the upper equipment, and can also be connected with the upper equipment in a wireless mode. As shown in fig. 1 and 3, the ultra-micro scalp electrode array 3-a is mounted in the helmet array slot 4-1 and can move up and down in the helmet array slot 4-1, as shown in fig. 4, after the ultra-micro scalp electrode array 3-a is pressed down into the helmet array slot 4-1, the ultra-micro scalp electrodes in the ultra-micro scalp electrode array will contact with the scalp, as shown in fig. 5, the plurality of ultra-micro scalp electrode arrays 3-a are located above the scalp corresponding to the brain cortex body movement center 2-J, and collect the electric signals generated by the brain cortex body movement center. The miniature multichannel signal amplifier 4-2, the miniature multichannel analog-to-digital converter 4-3 and the signal transmitter 4-4 are composed of a miniature single-board computer and are positioned in the helmet shell.
The ultra-micro scalp electrode array 3-A is composed of an ultra-micro scalp electrode array module 1-6 and a group of ultra-micro scalp electrodes 1-0 whose main body is installed in the ultra-micro scalp electrode array module. The main body of the ultra-micro scalp electrode is in a slender cylindrical shape with an enlarged tail part and is made of metal materials such as silver, copper and the like with good conductivity. The ultra-micro scalp electrode array module is formed by hard plastic and the like, can be in a cube shape, a cylindrical shape or a special shape according to practical application environment, can internally contain one or more ultra-micro scalp electrodes and forms an array.
As shown in fig. 7 to 8, the ultra-micro scalp electrode comprises an ultra-micro scalp electrode head 1-1, an ultra-micro scalp electrode body 1-2, an ultra-micro scalp electrode tail 1-3, an electrode wire 1-4 and a spring 1-5. The head of the ultra-micro scalp electrode is contacted with the scalp and is hemispherical, and the surface of the ultra-micro scalp electrode is covered with graphene or platinum and other materials with good conductivity, so that the conductivity contacted with scalp tissues and the affinity to human tissues are improved. The body of the ultra-micro scalp electrode is in a slender cylindrical shape and is arranged on the head of the ultra-micro scalp electrode, and an electromagnetic shielding coating layer composed of permalloy or aluminum and other materials is plated on the surface of the ultra-micro scalp electrode and is used for shielding interference of external electromagnetic waves and mutual interference between electrodes. The tail part of the ultra-micro scalp electrode is in a short cylinder shape, the diameter of the tail part is larger than that of the head part and the body part of the ultra-micro scalp electrode, the lower end of the tail part is connected with the body part of the ultra-micro scalp electrode, and the upper end of the tail part is connected with the electrode wire. The electrode wire is made of silver, copper and other materials with good conductivity, the insulating rubber and the electromagnetic shielding layer are wrapped outside, one end of the electrode wire is connected with the tail of the ultramicro scalp electrode, and the other end of the electrode wire penetrates through the surface of the ultramicro scalp electrode array module and is connected with upper equipment to achieve a signal transmission function. The spring is arranged above the tail part of the ultra-micro scalp electrode, when the ultra-micro scalp electrode is forced to move upwards, the spring is compressed, and when the force is released, the ultra-micro scalp electrode is restored to the original position under the action of the spring. The interior of the ultramicro scalp electrode array module is provided with an electrode bin 1-7, the lower end of the electrode bin is provided with an electrode sliding hole 1-8, and the surface of the ultramicro scalp electrode array module is provided with an electromagnetic shielding coating 1-9. The inner wall of the electrode bin is cylindrical, the diameter of the electrode bin is slightly larger than that of the tail of the ultramicro scalp electrode, the tail of the ultramicro scalp electrode can move up and down in the electrode bin, and the spring is positioned at the upper part of the tail of the ultramicro scalp electrode in the electrode bin. The inner wall of the electrode sliding hole is cylindrical, the diameter of the electrode sliding hole is slightly larger than that of the body of the ultramicro scalp electrode, the upper part of the electrode sliding hole is communicated with the electrode bin, and the lower part of the electrode sliding hole is communicated with the outside of the ultramicro scalp electrode array module; the ultra-micro scalp electrode body can move up and down along the electrode sliding hole, and the electrode sliding hole plays a role in supporting and guiding the ultra-micro scalp electrode body. The electromagnetic shielding coating on the surface of the ultramicro scalp electrode array module is used for shielding the interference of external electromagnetic waves.
The operating principle of the ultra-micro scalp electrode array is shown in fig. 9, and when the ultra-micro scalp electrode array module descends, the head of the ultra-micro scalp electrode can pass through the hair on the scalp surface to reach the scalp surface because the head of the ultra-micro scalp electrode is tiny and the body is slender. When the head of the ultra-micro scalp electrode contacts with the scalp A, under the upward resistance of the scalp, the ultra-micro scalp electrode and the ultra-micro scalp electrode array module generate relative motion, the spring is compressed, the head of a person is round, radian exists on the surface of the scalp, hair follicles, grease and the like on the surface of the scalp enable the surface of the scalp to be uneven, the amplitude of the relative motion between different ultra-micro scalp electrodes in the electrode array module and the electrode array module is different, and under the action of the spring, each ultra-micro scalp electrode head is tightly contacted with the surface of the scalp for protection, so that the adaptation of each ultra-micro scalp electrode to the radian and the unevenness of the surface of the scalp is ensured, and meanwhile, the good conductivity of each ultra-micro scalp electrode and the scalp is also ensured. Although the contact area between each of the ultra-micro scalp electrode heads and the scalp is very small, the array formed by a plurality of ultra-micro scalp electrodes in the ultra-micro scalp electrode array module can equally share the pressure of the ultra-micro scalp electrode array on the scalp, and the spring also buffers the impact of the ultra-micro scalp electrode heads on the scalp, so that the damage and uncomfortable feeling on the surface of the scalp can not be caused.
As shown in fig. 1, the cortical magnetic signal writing unit is composed of a plurality of stereotactic magnetic head arrays 3-B which are positioned in the helmet shell and composed of stereotactic magnetic heads, and the connecting wires of each stereotactic magnetic head are gathered to a helmet data wire 4-5 and connected with upper equipment. As shown in FIG. 6, the stereotactic head array 3-B is placed on the surface of the scalp corresponding to the somatosensory center 2-K of the cerebral cortex, and the low frequency magnetic field generated by the stereotactic head array can penetrate the scalp and the skull to act on the somatosensory center 2-K.
As shown in fig. 10 and 11, the stereotactic magnetic head is composed of a stereotactic magnetic head housing 2-1, a pulsed magnetic field coil 2-2, a pulsed magnetic field guide post 2-3, a plurality of magnetic field stereotactic control coils 2-4, a magnetic field guide conical ring 2-5, a pulsed magnetic field coil holder disk 2-6, and a magnetic field stereotactic control coil holder disk 2-7. The pulse magnetic field guide post is sleeved in the center of the pulse magnetic field coil, the pulse magnetic field coil is arranged at the upper end of the inside of the stereotactic magnetic head shell through a pulse magnetic field coil bracket disc, and the pulse magnetic field coil is connected to the pulse magnetic field coil control unit through a pulse magnetic field coil connecting lead 2-D; the magnetic field stereotactic control coils are uniformly distributed at the lower end of the inside of the stereotactic magnetic head shell through magnetic field stereotactic control coil support plates, are connected to the magnetic field stereotactic control coil control unit through stereotactic control coil connecting wires 2-E, and the magnetic field guiding conical ring is arranged at the bottom of the stereotactic magnetic head shell.
The stereotactic magnetic head shell adopts high magnetic permeability materials (such as permalloy, aluminum and the like) to shield a direct current magnetic field and a low-frequency alternating current magnetic field, thereby preventing the mutual influence of magnetic fields generated by adjacent stereotactic magnetic heads. The pulsed magnetic field coil is used to generate a pulsed magnetic field (e.g., the magnetic induction lines generated by the pulsed magnetic field coil are shown as 2-B in fig. 11). The pulse magnetic field guide post is made of metal, so that the pulse magnetic field poles are distributed along the longitudinal axis direction of the guide post, the lower end of the guide post is in an inverted cone shape, and the magnetic induction linear density can be controlled. The magnetic field stereotactic control coils are uniformly distributed in a circular ring shape, the generated magnetic fields are circular ring-shaped (as 2-A points in fig. 11 are magnetic induction lines generated by the stereotactic control coils), the magnetic field formed by each control coil and the pulse magnetic field formed by the pulse magnetic field coil are the same in polar direction on the longitudinal axis, so that the two magnetic fields are mutually exclusive, when the pulse magnetic field formed by the pulse magnetic field coil passes through the magnetic field circular ring formed by the plurality of control coils, the pulse magnetic field formed by the pulse magnetic field coil is compressed into a cone shape with the downward tip, the pulse magnetic field energy density is concentrated at the cone tip (as 2-C points in fig. 11), and the shape of the pulse magnetic field formed by the pulse magnetic field coil is changed by adjusting the strength of the magnetic field generated by the control coil, so that the 2-C points can move up and down in the longitudinal axis direction of the pulse magnetic field coil, and the stereotactic purpose is realized. The energy intensity of the pulse magnetic field formed by the pulse magnetic field coil just can enable the cerebral cortex nerve cells positioned at the point to generate the membrane potential (point 2-C in fig. 11), and the energy intensity of other parts of the magnetic field can not reach the threshold value of the cerebral cortex nerve cells for generating the membrane potential, so that the cell electric activity of the cerebral cortex functional area corresponding to the point can be accurately controlled by adjusting the position of the point in the cerebral cortex. The magnetic field guiding conical ring is a reverse trapezoidal ring with wide upper part and narrow lower part, the inner hole of the upper part of the ring is larger than the inner hole of the lower part of the ring, the ring is made of materials with high magnetic permeability (such as permalloy, aluminum and the like) and is used for shielding a direct-current magnetic field and a low-frequency alternating-current magnetic field, and the magnetic field generated by the pulse magnetic field coil is guided out from the inner hole of the ring; while shielding the magnetic field of the stereotactic control coil from leaking. The pulsed magnetic field coil support plate is used for supporting and fixing the pulsed magnetic field coil, is made of plastic materials, and does not affect the magnetic field. The magnetic field stereotactic control coil bracket disc is used for supporting and fixing the magnetic field stereotactic control coil, is made of plastic materials, and does not influence the magnetic field. The pulse magnetic field coil connecting lead 2-D is used for connecting the pulse magnetic field coil and the pulse magnetic field coil control unit, and the outside of the pulse magnetic field coil connecting lead is wrapped with an electromagnetic shielding rubber layer to prevent electromagnetic interference inside the three-dimensional directional magnetic head. The magnetic field stereotactic control coils 2-E are used for connecting the magnetic field stereotactic control coils and the magnetic field stereotactic control coil control units, the magnetic field stereotactic control coils are connected in series through stereotactic control coil connecting wires 2-F, and the connecting wires are wrapped with electromagnetic shielding rubber layers to prevent electromagnetic interference inside the stereotactic magnetic head. The pulse magnetic field coil is connected with the lead 2-D, and the stereotactic control coil is connected with the lead 2-E, and the lead enters the lead outer sleeve 2-G and is led to upper equipment.
The three-dimensional directional magnetic head array 3-B is a dense array formed by a plurality of three-dimensional directional magnetic heads 3, and the magnetic field intensity, the pulse frequency and the magnetic field polar direction generated by the pulse magnetic field coil of each three-dimensional directional magnetic head are independently regulated and controlled by the pulse magnetic field coil control unit; the magnetic field intensity and the magnetic field polar direction of each stereotactic control coil are independently regulated and controlled by a magnetic field stereotactic control coil control unit. Thus, a stereotactic head array will produce complex pulsed magnetic fields that can be localized, coded, and matched to the neural electrical activity of the targeted cortical neural cell population.
The invention can be connected with the operation control system and the sensory control system to realize the control function of the bidirectional neural network. The multifunctional human brain computer interface helmet collects brain somatic motion center through the ultramicro scalp array on the scalp surface to generate electric signals, and the electric signals are amplified by the signal amplifier, converted into digital signals through the analog-to-digital converter and transmitted to the motion control system (upper equipment) through the signal transmitter. The multifunctional human brain computer interface helmet receives the control of the sensory control system (upper equipment) through the three-dimensional directional magnetic head array on the scalp surface and transmits the artificial sensory signals to the brain somatosensory center.
It should be emphasized that the examples described herein are illustrative rather than limiting, and therefore the invention includes, but is not limited to, the examples described in the detailed description, as other embodiments derived from the technical solutions of the invention by a person skilled in the art are equally within the scope of the invention.
Claims (4)
1. A multi-functional human brain computer interface helmet, includes helmet shell, its characterized in that: a cortex electric signal reading unit and a cortex magnetic signal writing unit are arranged on the helmet shell; the cortex electric signal reading unit comprises an ultramicro scalp electrode array, a miniature multichannel signal amplifier, a miniature multichannel analog-to-digital converter and a signal transmitter which are sequentially connected, wherein the ultramicro scalp electrode array is arranged in a helmet array slot and can move up and down in the helmet array slot, the miniature multichannel signal amplifier, the miniature multichannel analog-to-digital converter and the signal transmitter are arranged in a helmet shell and are summarized to a helmet data line through an internal cable, and the ultramicro scalp electrode array is positioned on the surface of a scalp corresponding to a brain cortex body movement center; the cortex magnetic signal writing unit consists of a plurality of stereotactic magnetic heads positioned in the helmet shell, connecting wires of each stereotactic magnetic head are summarized to helmet data wires, and the stereotactic magnetic head array is positioned on the surface of the scalp corresponding to the brain cortex somatosensory center;
the ultra-micro scalp electrode array consists of an ultra-micro scalp electrode array module and a group of ultra-micro scalp electrodes of which the main body is arranged in the ultra-micro scalp electrode array module; the ultra-micro scalp electrode comprises an ultra-micro scalp electrode head, an ultra-micro scalp electrode body, an ultra-micro scalp electrode tail, an electrode wire and a spring, wherein the ultra-micro scalp electrode body is arranged on the ultra-micro scalp electrode head, one end of the ultra-micro scalp electrode tail is connected with the ultra-micro scalp electrode body, the other end of the ultra-micro scalp electrode tail is connected with the electrode wire, one end of the electrode wire is connected with the ultra-micro scalp electrode tail, the other end of the electrode wire penetrates through the surface of the ultra-micro scalp electrode array module and is connected with upper equipment to realize a signal transmission function, and the spring is arranged above the ultra-micro scalp electrode tail; an electrode bin is arranged in the ultramicro scalp electrode array module, the tail part of the ultramicro scalp electrode and the spring are arranged in the electrode bin to move up and down, and an electrode sliding hole is arranged at the lower end of the electrode bin and communicated with the outside of the ultramicro scalp electrode array module to support and guide the ultramicro scalp electrode body;
the ultra-micro scalp electrode array module is made of hard plastic, and an electromagnetic shielding coating is arranged on the surface of the ultra-micro scalp electrode array module; the head part of the ultra-micro scalp electrode, the body part of the ultra-micro scalp electrode, the tail part of the ultra-micro scalp electrode and the electrode wires are all made of silver materials or copper materials; the head of the ultra-micro scalp electrode is hemispherical, and the surface of the ultra-micro scalp electrode is covered with graphene or platinum materials; the ultra-micro scalp electrode body is in a slender cylindrical shape, and an electromagnetic shielding coating consisting of permalloy or aluminum material is plated on the surface of the ultra-micro scalp electrode body; the tail part of the ultra-micro scalp electrode is in a short cylinder shape, and the diameter of the tail part is larger than that of the head part and the body part of the ultra-micro scalp electrode; the outside of the electrode wire is wrapped with insulating rubber and an electromagnetic shielding layer; the inner wall of the electrode bin is cylindrical, the diameter of the electrode bin is slightly larger than the diameter of the tail part of the ultramicro scalp electrode, the inner wall of the electrode sliding hole is cylindrical, and the diameter of the electrode bin is slightly larger than the diameter of the body part of the ultramicro scalp electrode; each electrode wire of the group of the ultra-micro scalp electrodes is respectively connected with the upper equipment, or each electrode wire of the group of the ultra-micro scalp electrodes is connected with the upper equipment after being communicated.
2. A multi-function human brain computer interface helmet according to claim 1, wherein: the helmet shell is made of elastic non-conductive materials, and the inner surface of the helmet shell is tightly adhered to the surface of the scalp and covers the scalp corresponding to the somatic motor center of the cerebral cortex and the somatic motor sensory center.
3. A multi-function human brain computer interface helmet according to claim 1 or 2, wherein: the three-dimensional directional magnetic head comprises a three-dimensional directional magnetic head shell, a pulse magnetic field coil, a pulse magnetic field guide column, a plurality of magnetic field three-dimensional directional control coils and a magnetic field guide conical ring; the pulse magnetic field guide column is sleeved in the center of the pulse magnetic field coil and the pulse magnetic field coil is arranged at the upper end of the inside of the stereotactic magnetic head shell, the plurality of magnetic field stereotactic control coils are uniformly distributed at the lower end of the inside of the stereotactic magnetic head shell according to a circular shape, and the magnetic field guide conical ring is arranged at the bottom of the stereotactic magnetic head shell.
4. A multi-function human brain computer interface helmet according to claim 3, wherein: the pulse magnetic field coils are arranged in the stereotactic magnetic head shell through pulse magnetic field coil support plates, and the magnetic field stereotactic control coils are arranged in the stereotactic magnetic head shell through magnetic field stereotactic control coil support plates; the pulsed magnetic field coil support plate and the magnetic field stereotactic control coil support plate are both made of plastic materials; the three-dimensional directional magnetic head shell is made of a high-permeability material; the pulse magnetic field guide column is made of metal materials, and the lower end of the pulse magnetic field guide column is in an inverted cone shape; the magnetic field guiding conical ring is made of high-permeability materials and is in a shape of an inverted trapezoid circular ring with a wide upper part and a narrow lower part, and the upper inner hole of the circular ring is larger than the lower inner hole; the pulse magnetic field coil is connected with the pulse magnetic field coil control unit through a connecting wire wrapped with an electromagnetic shielding rubber layer; the magnetic field stereotactic control coils are connected with the magnetic field stereotactic control coil control unit through connecting wires wrapped with the electromagnetic shielding rubber layer, and the magnetic field stereotactic control coils are connected in series through the connecting wires wrapped with the electromagnetic shielding rubber layer.
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| CN109366508A (en) * | 2018-09-25 | 2019-02-22 | 中国医学科学院生物医学工程研究所 | A kind of advanced machine arm control system and its implementation based on BCI |
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