CN114190945B - Adjustable helmet for measuring brain magnetic signals - Google Patents

Abstract

The invention discloses an adjustable helmet for measuring brain magnetic signals, which relates to the technical field of biomedical engineering and comprises a helmet shell, a limiting structure and a plurality of sensor clamping mechanisms; the number of the sensor clamping mechanisms is the same as that of the magnetic sensors arranged on the helmet shell; the sensor clamping mechanisms are in one-to-one correspondence with the magnetic sensors; the helmet shell is used for being worn on the head; the limiting structure is used for limiting the stability of the helmet shell relative to the head; the sensor clamping mechanism is arranged on the helmet shell; the sensor clamping mechanism is used for clamping the magnetic sensor and adjusting the measuring direction and position of the magnetic sensor relative to the head; the magnetic sensor is used for measuring the magnetoencephalography signals. The invention can be compatible with the magnetoencephalography of different people at the same time under the condition that the distance between the magnetic sensor and the head of the person is small enough and the magnetic sensor is attached to the surface of the head of the person.

Description

An adjustable helmet for magnetic brain signal measurement

Technical field

The invention relates to the technical field of biomedical engineering, and in particular to an adjustable helmet used for brain magnetic signal measurement.

Background technique

Magnetoencephalography (MEG) is a non-invasive functional brain imaging method that has been widely used in clinical diagnosis and scientific research involving mental health problems and brain diseases.

Currently, commercial magnetoencephalography instruments are mainly based on superconducting quantum interference device (SQUID). However, the sensor needs to be embedded in a low-temperature Dewar bottle for cooling during operation, which limits the distance between the magnetic sensor and the surface of the subject's brain. The distance results in a low signal-to-noise ratio. At the same time, it is bulky and has high operation and maintenance costs.

Research progress in the field of weak magnetic precision measurement has led to the emergence of atomic magnetometers that meet the requirements for magnetic brain measurement, providing the possibility for a new generation of magnetoencephalography equipment. Existing experiments show that the sensitivity of an atomic magnetometer in a spin-exchangerelaxation free (SERF) state is comparable to that of a SQUID magnetometer.

Compared with current commercial magnetoencephalography instruments, magnetoencephalography systems based on atomic magnetometers do not require low-temperature working conditions when operating, so they do not require continuous replenishment of liquid helium, resulting in lower operation and maintenance costs, and the magnetic sensors are closer to each other. The surface of the brain, usually within a centimeter, has a higher signal-to-noise ratio. However, at this stage, due to differences in individual brain sizes and surface contours, most magnetic brain signal measurement helmets based on atomic magnetometers are customized and are not compatible with brain magnetic measurement of different sizes and contours.

In order to ensure that the distance between the magnetic sensor and the person's head is small enough and that the current magnetic brain measurement helmet fits the surface of the person's head, it is generally based on the three-dimensional scanned head contour shape and then expands a certain thickness as the helmet curved surface, and then according to the magnetic sensor The dimensions are dug into a groove and the sensor is inserted directly into the groove. However, since the helmet is customized according to the contour of the individual head, it is limited to personal use and is not compatible.

In summary, the field is in urgent need of an adjustable helmet for measuring magnetic brain signals, which can be compatible with different people's brains while ensuring that the distance between the magnetic sensor and the person's head is small enough and it fits the surface of the person's head. Magnetic measurements.

Contents of the invention

The purpose of the present invention is to provide an adjustable helmet for measuring magnetic brain signals, which can be compatible with the magnetic brain measurements of different people under the condition that the distance between the magnetic sensor and the person's head is small enough and it fits the surface of the person's head. .

In order to achieve the above objects, the present invention provides the following solutions:

An adjustable helmet for measuring magnetic brain signals, including a helmet shell, a limiting structure and multiple sensor clamping mechanisms;

The number of the sensor clamping mechanisms is the same as the number of magnetic sensors provided on the helmet shell; the sensor clamping mechanisms correspond to the magnetic sensors one-to-one;

The helmet shell is used to be worn on the head; the limiting structure is used to limit the stability of the helmet shell relative to the head; the sensor clamping mechanism is provided on the helmet shell; the sensor The clamping mechanism is used to clamp the magnetic sensor and adjust the measurement direction and position of the magnetic sensor relative to the head; the magnetic sensor is used to measure brain magnetic signals.

Optionally, the limiting structure is any one or more combinations of a limiting bolt set, a chin bracket or an elastic bandage;

The limiting bolt group includes a plurality of limiting bolts.

Optionally, a plurality of through holes with internal threads are also included;

The number of the through holes with internal threads is the same as the number of the limit bolts; the through holes with internal threads correspond to the limit bolts one by one;

The through hole with internal threads is provided on the helmet shell; the through hole with internal threads is used to assemble the limiting bolt.

Optionally, it also includes multiple rotating buckle structures;

The number of the rotary buckle structures is the same as the number of the sensor clamping mechanisms; the rotary buckle structures correspond to the sensor clamping mechanisms one-to-one;

The rotary buckle structure is provided on the helmet shell; the rotary buckle structure is used to assemble the sensor clamping mechanism.

Optionally, the sensor clamping mechanism specifically includes a cylindrical card holder, a sensor adjustment element and a sensor bracket;

The cylindrical card holder is fixed on the rotating buckle structure; the sensor adjustment element is rotatably set in the cylindrical card holder; the sensor bracket is set in the sensor adjustment element; the magnetic sensor is fixed In the sensor bracket; the sensor adjustment element is used to adjust the distance of the sensor bracket relative to the head and adjust the direction of the sensor bracket relative to the head; the distance of the sensor bracket relative to the head is the The position of the magnetic sensor relative to the head; the direction of the sensor bracket relative to the head is the measurement direction of the magnetic sensor relative to the head.

Optionally, the sensor adjustment element specifically includes a spherical structure and a clamping fixed structure;

The clamping fixed structure is fixed on the upper part of the spherical structure; the spherical structure is rotatably arranged in the cylindrical holder; the sensor bracket is arranged in the clamping fixed structure; the spherical structure It is used to adjust the direction of the sensor bracket relative to the head; the clamping fixing structure is used to adjust the distance of the sensor bracket relative to the head.

Optionally, the sensor clamping mechanism further includes a locking knob;

The locking knob is used to lock the spherical structure so that the spherical structure cannot rotate.

Optionally, the sensor clamping mechanism also includes a pressing ring and a pressing block;

The pressing block is a part cut off from the pressing ring; the pressing ring and the pressing block are assembled into a circular ring structure; the circular ring structure is arranged in the cylindrical card seat; the pressing ring and the pressing block are The surfaces where the pressure blocks contact each other are trapezoidal slopes; the pressure blocks are in contact with the locking knob; the pressure blocks are used to generate a force perpendicular to the spherical structure when the locking knob is rotated to lock the spherical structure. The force in the radial direction of the axial direction of the sensor adjustment element; the trapezoidal slope is used to generate a component force along the axial direction of the sensor adjustment element.

Optionally, the sensor clamping mechanism also includes an upper elastic washer and a lower elastic washer;

The upper elastic washer is arranged on the top of the cylindrical card seat; the lower elastic washer is arranged on the bottom of the cylindrical card seat; both the upper elastic washer and the lower elastic washer are used to limit the spherical shape. structure, which provides buffering for the rotation of the spherical structure and friction for the spherical structure, the pressing ring and the pressing block.

According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

The adjustable helmet used for brain magnetic signal measurement disclosed by the present invention has a new magnetic sensor adjustment structure, that is, a sensor clamping mechanism. The sensor clamping mechanism is used to clamp the magnetic sensor and adjust the measurement of the magnetic sensor relative to the head. direction and position, so that it can be compatible with the magnetic brain measurement of different people at the same time under the condition that the distance between the magnetic sensor and the person's head is small enough and it fits the surface of the person's head.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the drawings of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a structural diagram of an embodiment of an adjustable helmet for measuring brain magnetic signals according to the present invention;

Figure 2 is a schematic structural diagram of the helmet shell of the present invention;

Figure 3 is a schematic structural diagram of the sensor clamping mechanism of the present invention;

Figure 4 is a schematic structural diagram of the sensor adjustment element of the present invention;

Figure 5 is a cross-sectional view of the sensor clamping mechanism of the present invention;

Figure 6 is a schematic structural diagram of the sensor bracket of the present invention;

Figure 7 is a perspective view of the cylindrical card holder of the present invention;

Figure 8 is a schematic structural diagram of the pressing ring of the present invention;

Figure 9 is a schematic structural diagram of the pressing block of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

The purpose of the present invention is to provide an adjustable helmet for measuring magnetic brain signals, which can be compatible with the magnetic brain measurements of different people under the condition that the distance between the magnetic sensor and the person's head is small enough and it fits the surface of the person's head. .

In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Figure 1 is a structural diagram of an embodiment of an adjustable helmet for measuring brain magnetic signals according to the present invention. Referring to FIG. 1 , the adjustable helmet for measuring brain magnetic signals includes a helmet shell 110 , a limiting structure 120 and a plurality of sensor clamping mechanisms 130 .

The number of sensor clamping mechanisms 130 is the same as the number of magnetic sensors provided on the helmet shell 110; the sensor clamping mechanisms 130 correspond to the magnetic sensors one-to-one.

The helmet shell 110 is used to be worn on the head; the limiting structure 120 is used to limit the stability of the helmet shell 110 relative to the head; the sensor clamping mechanism 130 is provided on the helmet shell 110; the sensor clamping mechanism 130 is used to clamp Hold the magnetic sensor and adjust the measurement direction and position of the magnetic sensor relative to the head; the magnetic sensor is used to measure brain magnetic signals.

Specifically, the limiting structure 120 is any one or more combinations of a limiting bolt group, a chin bracket, or an elastic bandage; the limiting bolt group includes a plurality of limiting bolts. In this embodiment, the limiting structure 120 is a limiting bolt group.

The sensor clamping mechanism 130 supports adjusting the measurement direction and position (sensitive direction and distance) of the magnetic sensor relative to the brain.

Further, the adjustable helmet for measuring brain magnetic signals also includes a plurality of through holes 112 with internal threads.

The number of through holes 112 with internal threads is the same as the number of limit bolts; the through holes 112 with internal threads correspond to the limit bolts one-to-one.

The through hole 112 with internal thread is provided on the helmet shell 110; the through hole 112 with internal thread is used to assemble the limiting bolt.

Furthermore, the adjustable helmet for measuring brain magnetic signals also includes a plurality of rotating buckle structures 111 .

The number of the rotary buckle structures 111 is the same as the number of the sensor clamping mechanisms 130; the rotary buckle structures 111 correspond to the sensor clamping mechanisms 130 one-to-one.

The rotating buckle structure 111 is provided on the helmet shell 110; the rotating buckle structure 111 is used to assemble the sensor clamping mechanism 130.

The schematic structural diagram of the helmet shell 110 is shown in Figure 2. The helmet shell 110 refers to the internationally accepted 10-20 standard EEG collection lead system and the physiological structure and functional divisions of the human brain for the position distribution of the mounting holes of the sensor clamping mechanism 130. And the position distribution of the limit bolts, that is, the position distribution of the limit bolt holes is designed, and there is a rotating buckle structure 111 for assembling the sensor clamping mechanism 130 and an internal thread for assembling the limit bolts at the corresponding positions. The through hole 112; the limiting bolt is used to limit the relative stability of the head and the helmet shell 110, and suppress the generation of brain magnetic signal artifacts. In order to suppress the generation of magnetic brain signal artifacts, first of all, the outline size of the helmet shell 110 is larger than the actual outline of a person's head. The limit bolts are also custom-made by 3D printing. They have a large cross-sectional area and are threaded with the helmet. The shell 110 is connected, so when wearing the helmet shell 110, rotating the limiting bolt to make it contact with the head can ensure that the head and the helmet shell 110 will not have serious relative displacement. In addition, in order to ensure a relatively comfortable contact with the head, a gasket made of soft rubber material can be added to the contact end to play a buffering and protective role. In addition to the limiting bolts, chin rests and elastic bandages can also be used to ensure the stability of the helmet shell 110 relative to the head.

Specifically, the sensor clamping mechanism 130 specifically includes a cylindrical holder 133, a sensor adjustment element 132 and a sensor bracket 131.

The cylindrical card holder 133 is fixed on the rotating buckle structure 111; the sensor adjustment element 132 is rotated and set in the cylindrical card holder 133; the sensor bracket 131 is set in the sensor adjustment element 132; the magnetic sensor is fixed in the sensor bracket 131; the sensor adjustment The element 132 is used to adjust the distance of the sensor bracket 131 relative to the head and the direction of the sensor bracket 131 relative to the head; the distance of the sensor bracket 131 relative to the head is the position of the magnetic sensor relative to the head; the sensor bracket 131 is relative to the head. The direction of the head is the measurement direction of the magnetic sensor relative to the head.

Specifically, the sensor adjustment element 132 specifically includes a spherical structure and a clamping fixed structure.

The clamping fixed structure is fixed on the upper part of the spherical structure; the spherical structure is rotated and set in the cylindrical holder 133; the sensor bracket 131 is set in the clamping fixed structure; the spherical structure is used to adjust the direction of the sensor bracket 131 relative to the head ; The clamping fixed structure is used to adjust the distance of the sensor bracket 131 relative to the head.

Further, the sensor clamping mechanism 130 also includes a locking knob 124 .

The locking knob 124 is used to lock the spherical structure so that the spherical structure cannot rotate.

Further, the sensor clamping mechanism 130 also includes a pressing ring 137 and a pressing block 138 .

The pressing block 138 is a cut-off part of the pressing ring 137; the pressing ring 137 and the pressing block 138 are assembled into a circular ring structure; the circular ring structure is arranged in the cylindrical card seat 133; the mutual contact surfaces of the pressing ring 137 and the pressing block 138 are trapezoidal. Inclined surface; the pressing block 138 is in contact with the locking knob 124; the pressing block 138 is used to generate a force in the radial direction perpendicular to the axial direction of the sensor adjustment element 132 when the locking knob 124 is rotated to lock the spherical structure; trapezoidal inclined surface It is used to generate a component force along the axial direction of the sensor adjustment element 132 .

Further, the sensor clamping mechanism 130 also includes an upper elastic washer 135 and a lower elastic washer 136 .

The upper elastic washer 135 is arranged on the top of the cylindrical card seat 133; the lower elastic washer 136 is arranged on the bottom of the cylindrical card seat 133; both the upper elastic washer 135 and the lower elastic washer 136 are used to limit the spherical structure and provide support for the rotation of the spherical structure. Cushioning and providing friction for the spherical structure, pressure ring 137 and pressure block 138 .

The schematic structural diagram of the sensor clamping mechanism 130 is shown in Figure 3. Its core component is the sensor adjustment element 132 with a spherical structure and a clamping fixed structure. The spherical structure of the sensor adjustment element 132 can realize the adjustment of the magnetic brain signal detection direction. . The spherical structure has no direct connection with the rotating buckle structure 111 . The rotating buckle structure 111 refers to the raised ring on the helmet shell 110 and the three small cylindrical protrusions on each ring. This design is to cooperate with the rotating slot structure of the cylindrical card base 133. It only plays a fixed role. When the cylindrical socket 133 is fixed to the helmet shell 110, the movable space of the spherical structure of the sensor adjustment element 132 is limited (the center of the ball is basically unchanged), and it can only perform rotational movement. On this basis, rotation means the adjustment of the sensitive direction of the sensor, and the clamping fixed structure and the nylon tie can realize the adjustment of the distance of the magnetic sensor relative to the brain surface. The structure of the sensor adjustment element 132 is shown in Figure 4.

The internal structure of the sensor clamping mechanism 130 is as shown in the cross-sectional view of the sensor clamping mechanism 130, that is, part (a) in FIG. 5 . Part (b) in Figure 5 is a front view of the sensor clamping mechanism 130, and part (a) in Figure 5 is a longitudinal section of part (b) in Figure 5 . As shown in Figure 5, the sensor clamping mechanism 130 specifically includes:

1. Sensor bracket 131. The schematic structural diagram of the sensor bracket 131 is shown in Figure 6. The basic structure of the sensor bracket 131 is two cuboids with a small thickness connected by four pillars in the middle. In order not to affect the measurement of magnetic brain signals, the middle of the cuboid corresponding to the bottom surface of the magnetic sensor is hollowed out. The design of the sensor bracket 131 is based on the size of the magnetic sensor. The length and width of the sensor bracket 131 can just wrap the magnetic sensor, and the height of the sensor bracket 131 is higher than the magnetic sensor itself. At the same time, elastic clamping structures are designed on both sides of the sensor bracket 131. There is a protruding structure at the height corresponding to the magnetic sensor to clamp the magnetic sensor and restrict the degree of freedom of the magnetic sensor. The position of the magnetic sensor in the sensor bracket 131 is fixed. , the sensor bracket 131 clamps the magnetic sensor while increasing the adjustable depth of the magnetic sensor relative to the helmet shell 110. Generally, the height (thickness) of the magnetic sensor is small, and the height of the sensor bracket 131 is larger than the thickness of the magnetic sensor itself. , which is equivalent to increasing the adjustable depth of the magnetic sensor relative to the helmet shell 110, which can be better adapted to brains of different sizes, and provides the possibility of measuring magnetic brain signals of children.

2. Cylindrical card holder 133. The cylindrical socket 133 is a cylindrical hollow shell. The spherical structure of the sensor adjustment element 132 is assembled with the helmet shell 110 (main body) through the rotating slot structure (the slot is located on the side). The perspective view of the shaped card holder 133 is shown in Figure 7.

3. Upper elastic washer 135 and lower elastic washer 136. The upper elastic washer 135 and the lower elastic washer 136 are to limit the spherical structure of the sensor clamping structure 130, and the lower elastic washer 136 also needs to be cut off. The upper elastic washer 135 and the lower elastic washer 136 provide buffering for the rotation of the spherical structure of the sensor adjustment element 132 and increase friction between it and other elements, ie, the spherical structure, pressure ring, and pressure block. The spherical structure, pressure ring, and pressure block are all located in the space within the cylindrical card seat 133 .

4. Pressure ring 137 and pressure block 138. The schematic structural diagram of the pressing ring 137 is shown in Figure 8 , and the schematic structural diagram of the pressing block 138 is shown in Figure 9 . Part (a) of Figure 8 shows an overall schematic diagram of the pressing ring 137, and part (b) of Figure 8 is a plan view seen from the bottom of part (a) of Figure 8 . The pressing ring 137 is a circular ring structure with a selectively cut-off part, and the pressing block 138 is a cut-off part of the ring. The two can be matched, that is, simply overlapped, but the overlapping cross-section is a trapezoidal slope. The purpose of the matching is to rotate the locking knob. 124 causes the pressure block 138 to generate force in the radial direction perpendicular to the axial direction of the sensor adjustment element 132, and the trapezoidal slope causes the generation of component force along the axial direction of the sensor adjustment element 132, increasing the spherical shape of the sensor adjustment element 132. The friction between the structure and the elastic soft washers (upper elastic washer 135 and lower elastic washer 136) realizes the locking of the sensor adjustment element 132, and the contact surface between the pressure ring 137 and the pressure block 138 (already shown in Figures 8 and 9 Circled) is an inclined plane, that is, a trapezoidal inclined plane.

For the convenience of assembly, the pressing ring 137 and the pressing block 138 have grooves at corresponding positions on the sides, which correspond to the positions of the locking knob 124 during assembly. The groove of the pressure ring 137 is only for the convenience of making the groove of the pressure block 138 correspond to the position of the locking knob 124 during assembly.

5. Sensor adjustment component 132. The sensor adjustment element 132 has a spherical structure and a clamping fixed structure. The spherical structure allows the measurement direction of the magnetic sensor relative to the brain to be adjustable. At the same time, the clamping fixed structure cooperates with the tie to support the adjustable distance of the magnetic sensor relative to the surface of the brain. The clamping fixing structure is circled in Figures 3 and 4. It can be seen that the sensor bracket 131 can be fixed by passing a tie through the two holes and then tightening it. When it is not tightened, the sensor bracket 131 is relative to the The sensor adjustment element 132 can be moved arbitrarily. Referring to Figure 1, when the helmet shell 110 is worn, this means that the distance of the magnetic sensor relative to the surface of the brain is adjustable. The rolled strip here acts like a rope; the distance of the magnetic sensor relative to the surface of the brain is adjustable to make the distance between the magnetic sensor and the surface of the brain as small as possible, and the measurement direction of the magnetic sensor relative to the brain is adjustable so that the distance between the magnetic sensor and the brain surface is adjustable. The magnetic signal measurement point is as close as possible. The combination of the two not only solves the problem of weak universality of the current magnetic brain measurement helmet, but also ensures the signal-to-noise ratio of the magnetic brain signal measurement.

The sensor clamping mechanism 130 is assembled according to the order in which the upper elastic washer 135, sensor adjustment element 132, lower elastic washer 136, pressure ring 137 and pressure block 138 are assembled into the cylindrical card seat 133, that is, the above components are installed into the cylindrical card seat in sequence. After the holder 133 is installed, the cylindrical holder 133 and the helmet shell 110 are fixed to complete the assembly. Then, the cylindrical card holder 133 is connected to the helmet shell 110 according to the position of the slot of the cylindrical card holder 133 and the rotary buckle structure on the helmet shell 110, so as to ensure the relative position between the magnetic sensor and the helmet shell 110. Stablize. The limiting bolts can ensure the relative stability between the human head and the helmet shell 110 during magnetic brain measurement, thereby ensuring the relative stability between the magnetic sensor and the human head.

After the subject wears the helmet shell 110, use limit bolts to ensure the relative stability of the human brain and the helmet shell 110, and then insert the magnetic sensor that has been placed in the sensor bracket 131 into the remaining sensor clamping mechanism 130. First, adjust the detection direction of the magnetic sensor when measuring electroencephalogram signals to make it fit as closely as possible to the surface of the brain, and then rotate the locking knob 124 to ensure that the direction of the magnetic sensor relative to the brain does not change. Rotating the locking knob 124 until it can no longer rotate means that the spherical structure of the sensor adjustment element 132 can no longer rotate, that is, the orientation of the magnetic sensor will not change, which is equivalent to the direction of the magnetic sensor relative to the brain no longer changing. After the sensitive direction of the magnetic sensor is confirmed, adjust the distance of the magnetic sensor relative to the brain, that is, manually adjust the position (depth) of the sensor bracket 131 relative to the sensor adjustment element 132 and fix the sensor bracket 131 with a rolling band. Since the position of the magnetic sensor placed in the sensor bracket 131 is fixed, the fixation of the sensor bracket 131 is equivalent to the fixed position of the magnetic sensor relative to the brain.

The present invention realizes the adjustment of the magnetic brain signal detection direction based on the sensor clamping mechanism 130 through the cooperation of the spherical structure of the sensor adjustment element 132 and other elements. At the same time, it is also based on the clamping fixed structure and the cooperation (combination) of the cable ties to support the magnetic sensor relative to the brain. The distance between the surfaces is adjustable, so that the magnetic sensor can be fitted to the magnetic detection point when the helmet shell 110 does not fit the subject's brain, thereby ensuring that it is suitable for brain magnetoencephalography measurement of different sizes and the accuracy of magnetic detection. The signal-to-noise ratio is high. The spherical structure and clamping fixed structure of the sensor adjustment element 132 of the present invention realize the adjustment of the distance and sensitive direction of the magnetic sensor relative to the brain, making the helmet compatible with brain magnetoencephalogram measurements of different sizes and contours.

The present invention is based on the differences in individual brain sizes and contours, which leads to the need for personalized customization of magnetic brain signal measurement helmets based on atomic magnetometers according to personal conditions. The use cost is high, the customization process is complex, and it is difficult to achieve large-scale production, which is not conducive to the clinical application of brain magnetic measurement. Promote and commercialize development and provide a sensor-adjustable helmet design for measuring magnetic brain signals, involving a medical device that can ensure that the magnetic sensor adequately fits the surface of the brain and is suitable for brains of different sizes. Magnetoencephalometry. The design of the helmet of the present invention can ensure that the magnetic sensor is relatively close to the surface of the brain and is compatible with brain magnetic measurement of brains of different sizes. It solves the need for personalized brain magnetic signal measurement helmets based on atomic magnetometers due to differences in individual brain sizes and contours. Customization issues.

Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on its differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other.

This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and the core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the present invention There will be changes in the specific implementation methods and application scope of the ideas. In summary, the contents of this description should not be construed as limitations of the present invention.

Claims (6)

1. An adjustable helmet for measuring magnetic brain signals, which is characterized in that it includes a helmet shell, a limiting structure and a plurality of sensor clamping mechanisms, and also includes a plurality of rotating buckle structures; The number of the sensor clamping mechanisms is the same as the number of magnetic sensors provided on the helmet shell; the sensor clamping mechanisms correspond to the magnetic sensors one-to-one; The helmet shell is used to be worn on the head; the limiting structure is used to limit the stability of the helmet shell relative to the head; the sensor clamping mechanism is provided on the helmet shell; the sensor The clamping mechanism is used to clamp the magnetic sensor and adjust the measurement direction and position of the magnetic sensor relative to the head; the magnetic sensor is used to measure brain magnetic signals; The number of the rotary buckle structures is the same as the number of the sensor clamping mechanisms; the rotary buckle structures correspond to the sensor clamping mechanisms one-to-one; the rotary buckle structures are arranged on the helmet shell ; The rotating buckle structure is used to assemble the sensor clamping mechanism; the rotating buckle structure refers to the raised ring on the helmet shell and the three small cylindrical protrusions on each ring. This design is In order to cooperate with the rotary slot structure of the cylindrical card holder, it plays a fixed role; when the cylindrical card holder is fixed to the helmet shell, the activity space of the spherical structure of the sensor adjustment element is limited, and it can only perform rotational movement. ; The sensor clamping mechanism specifically includes a cylindrical card holder, a sensor adjustment element and a sensor bracket; the cylindrical card holder is fixed on the rotating buckle structure; the sensor adjustment element is rotated and arranged on the cylindrical card holder in; the sensor bracket is arranged in the sensor adjustment element; the magnetic sensor is fixed in the sensor bracket; the sensor adjustment element is used to adjust the distance of the sensor bracket relative to the head and adjust the sensor The direction of the bracket relative to the head; the distance of the sensor bracket relative to the head is the position of the magnetic sensor relative to the head; the direction of the sensor bracket relative to the head is the distance of the magnetic sensor relative to the head Measurement direction; The sensor adjustment element specifically includes a spherical structure and a clamping fixed structure; the clamping fixed structure is fixed on the upper part of the spherical structure; the spherical structure is rotatably arranged in the cylindrical holder; the sensor The bracket is arranged in the clamping fixed structure; the spherical structure is used to adjust the direction of the sensor bracket relative to the head; the clamping fixed structure is used to adjust the distance of the sensor bracket relative to the head . 2. The adjustable helmet for magnetic brain signal measurement according to claim 1, characterized in that the limiting structure is any one or more combinations of a limiting bolt group, a chin rest or an elastic bandage. ; The limiting bolt group includes a plurality of limiting bolts. 3. The adjustable helmet for measuring magnetic brain signals according to claim 2, further comprising a plurality of through holes with internal threads; The number of the through holes with internal threads is the same as the number of the limit bolts; the through holes with internal threads correspond to the limit bolts one by one; The through hole with internal threads is provided on the helmet shell; the through hole with internal threads is used to assemble the limiting bolt. 4. The adjustable helmet for magnetic brain signal measurement according to claim 1, wherein the sensor clamping mechanism further includes a locking knob; The locking knob is used to lock the spherical structure so that the spherical structure cannot rotate. 5. The adjustable helmet for measuring magnetic brain signals according to claim 4, wherein the sensor clamping mechanism further includes a pressure ring and a pressure block; The pressing block is a part cut off from the pressing ring; the pressing ring and the pressing block are assembled into a circular ring structure; the circular ring structure is arranged in the cylindrical card seat; the pressing ring and the pressing block are The surfaces where the pressure blocks contact each other are trapezoidal slopes; the pressure blocks are in contact with the locking knob; the pressure blocks are used to generate a force perpendicular to the spherical structure when the locking knob is rotated to lock the spherical structure. The force in the radial direction of the axial direction of the sensor adjustment element; the trapezoidal slope is used to generate a component force along the axial direction of the sensor adjustment element. 6. The adjustable helmet for magnetic brain signal measurement according to claim 5, wherein the sensor clamping mechanism further includes an upper elastic washer and a lower elastic washer; The upper elastic washer is arranged on the top of the cylindrical card seat; the lower elastic washer is arranged on the bottom of the cylindrical card seat; both the upper elastic washer and the lower elastic washer are used to limit the spherical shape. structure, which provides buffering for the rotation of the spherical structure and friction for the spherical structure, the pressing ring and the pressing block.