CN211213144U - Head-mounted device - Google Patents
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- CN211213144U CN211213144U CN201920965690.2U CN201920965690U CN211213144U CN 211213144 U CN211213144 U CN 211213144U CN 201920965690 U CN201920965690 U CN 201920965690U CN 211213144 U CN211213144 U CN 211213144U
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Abstract
The utility model relates to a head-wearing device, which comprises a wearing device; the wearing device includes a forehead fastening portion; the forehead fastening part is provided with a bioelectricity signal acquisition device; the bioelectrical signal acquisition device comprises an electrode assembly for acquiring an electroencephalogram signal, a first sensor for monitoring the heart rate and/or the heart rate variability and a second sensor for monitoring the skin conductivity; the head-mounted equipment is also provided with a communication unit and a processing chip, and the processing chip is used for calculating and analyzing data obtained by detection of the electrode assembly, the first sensor and the second sensor; the communication unit is used for sending the data calculated and analyzed by the processing chip to the server and/or the user terminal. The utility model discloses can realize the detection of brain electricity, rhythm of the heart variability and skin conductivity, carry out the analysis based on the fusion of multiple data, can be more accurate carry on such as user's fatigue degree, user's attention, the discernment of relaxing degree, emotional index.
Description
Technical Field
The utility model relates to a wearable equipment technical field especially relates to a head-mounted equipment.
Background
At present, when the head-mounted device is used for collecting the bioelectricity signals, only a single electroencephalogram signal can be collected generally, the fatigue degree of a user of the head-mounted device is monitored based on the electroencephalogram signal, and the attention, the relaxation degree, the emotion and the like of the user are identified.
However, the problem that the evaluation index is single and the evaluation result is inaccurate exists only by monitoring the state of the user through the electroencephalogram signal, so that the monitoring and fusion of the electroencephalogram signal and other bioelectricity signals are combined by those skilled in the art for monitoring and fusing. In particular, selecting which bioelectric signals to monitor and perform data fusion, and how to arrange and arrange the sensors or electrodes for monitoring the bioelectric signals are technical problems that need to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
To at least some extent overcome the above-mentioned problems of the prior art, the present invention provides a head-mounted device.
The embodiment of the utility model provides a head-mounted device, which comprises a wearing device; the wearing device includes a forehead fastening portion; the forehead fastening part is provided with a bioelectricity signal acquisition device; the bioelectrical signal acquisition device comprises an electrode assembly for acquiring an electroencephalogram signal, a first sensor for monitoring the heart rate and/or the heart rate variability and a second sensor for monitoring the skin conductivity; the head-mounted equipment is also provided with a communication unit and a processing chip, and the processing chip is used for calculating and analyzing data obtained by detection of the electrode assembly, the first sensor and the second sensor; the communication unit is used for sending the data calculated and analyzed by the processing chip to the server and/or the user terminal.
The embodiment of the utility model provides a, can realize the detection of brain electricity, rhythm of the heart variation rate and skin conductivity and the analysis based on the fusion of various kinds of data, can be more accurate carry on such as user's fatigue degree, user's attention, the discernment of degree of relaxing, emotional index.
According to a specific implementation manner of the head-mounted device of the embodiment of the present invention, the bioelectrical signal collecting device is disposed on the flexible circuit board; the flexible circuit board is a T-shaped circuit board.
The embodiment of the utility model provides a, set up the flexible circuit board into the T type, can make things convenient for binding and data processing and transmission of circuit board. For example, a horizontal long strip of the T-bar of the flexible circuit board is attached to the forehead fastening member, and a vertical long strip of the T-bar of the flexible circuit board has a free port connected to the communication unit. Of course, the flexible circuit board is not necessarily a T-shaped strip, but may have other shapes, such as an arc shape, an X shape, and the like.
According to a specific implementation of the head-mounted device according to an embodiment of the present invention, the electrode assembly comprises at least one first electrode, a second electrode, a third electrode and a fourth electrode as reference electrodes; the first electrode, the second electrode, the third electrode and the fourth electrode are arranged on the circuit board of the T-shaped circuit board in the horizontal direction; when the head-mounted device is in a wearing state, the first electrode is arranged in the area near the eyebrow center; the second electrode and the third electrode are detection electrodes and are distributed on two sides of the first electrode; the fourth electrode is an interference suppression electrode and is used for suppressing the interference of environmental electromagnetic noise; and the distance between the edges of the first electrode and the second electrode is greater than a preset first interval; the distance between the first electrode and the edge of the third electrode is greater than the first spacing.
The present embodiment is based on the following problems of the prior art: at present, when a head-mounted device is used for collecting bioelectricity signals of electroencephalogram signals, a reference electrode and an interference suppression electrode of the head-mounted device are usually arranged behind ears, and the point is not the optimal point for collecting the electroencephalogram signals. In addition, in the prior art, the point position relation of electrode points for detecting electroencephalogram is not further studied. In fact, the point position relation of the electrode points is very important, and the good point position relation design can improve the detection precision of biological signals and simplify the signal calculation complexity. That is to say, the solution of the embodiment of the present invention is made in response to the above problem, and the embodiment designs each electrode point of the first electrode, the second electrode, the third electrode and the fourth electrode, specifically, that is: the second electrode and the third electrode are laid out on both sides of the first electrode as the reference electrode, and the position of the fourth electrode as the interference suppression electrode is not limited. Through the technical scheme, the embodiment of the invention improves the detection precision of the biological signals.
According to a specific implementation manner of the head-mounted device of the embodiment of the present invention, the first sensor is a photoelectric sensor or a pressure sensor; if the first sensor is a photoelectric sensor, then: when the head-mounted equipment is in a wearing state, the position of the photoelectric sensor is a forehead non-shielding position; if the first sensor is a pressure sensor, then: the pressure sensor is positioned at one end of the T-shaped circuit board in the horizontal direction, and when the head-mounted equipment is in a wearing state, the position of the pressure sensor is an artery blood vessel gathering position.
According to the utility model discloses a concrete implementation of head-mounted device, the second sensor does one or more electrodes in the electrode subassembly, through multiplexing circuit, the electrode subassembly is used for realizing the detection of EEG signal collection and skin conductivity.
The embodiment of the utility model provides an in, through multiplexing the used electrode of collection with brain electrical signal collection and skin conductivity, the hardware architecture of simplification.
According to the embodiment of the present invention, in the electrode assembly, the position of the second electrode is determined as follows: determining a first circular area by taking a preset first central point as a circle center and a preset second interval as a radius, wherein the first electrode is positioned in the first circular area; determining a second circular area by taking a preset second central point as a circle center and the second interval as a radius; connecting the first central point and the second central point to determine a first connecting line; determining a first intersection point of the first connecting line with a boundary of the first circular area; drawing a first arc line with the first interval as a radius by taking the first intersection point as a circle center; determining a region of the second circular region outside the first arc as the location of the second electrode.
In this embodiment, after the positions of the first electrode and the second electrode are preliminarily determined, the settable position ranges of the first electrode and the second electrode are determined by a predetermined second interval, such as 2cm, that is, the first electrode may be placed in any position of the first circular area, and the second electrode may be placed in any position of the second circular area; on the basis, in order to reduce the interference between the first electrode and the second electrode to a permissible range, the distance between the edges of the first electrode and the second electrode cannot be smaller than the first interval, for example, cannot be smaller than 3cm, therefore, in the present embodiment, the first central point and the second central point are connected, the first connecting line between the first central point and the second central point is determined, the first intersection point of the first connecting line and the boundary of the first circular area is found, and finally, the first arc line with the first interval as the radius is drawn by taking the first intersection point as the center of the circle, so that the second electrode can be placed at a position of the second circular area in an area other than the first arc line. Obviously, the present embodiment designs the geometric positions of the electrodes more precisely, and further improves the detection accuracy of the biological signals.
According to the embodiment of the present invention, in the electrode assembly, the position of the third electrode is determined as follows: determining a third circular area by taking a preset third central point as a circle center and the second interval as a radius; connecting the first central point and the third central point to determine a second connecting line; determining a second intersection point of the second connecting line and the boundary of the third circular region; drawing a second arc line with the first interval as a radius by taking the second intersection point as a circle center; determining a region of the third circular region outside of the second arc as the location of the third electrode.
In this embodiment, after the position of the third electrode is preliminarily determined, the settable position range of the third electrode is determined by a predetermined second interval, such as 2cm, that is, the third electrode may be located in any position of the third circular region; on the basis, in order to reduce the interference between the first electrode and the third electrode to a permissible range, the distance between the edges of the first electrode and the third electrode must not be smaller than the first interval, for example, 3 cm. Therefore, in this embodiment, the first center point and the third center point are connected, the second connecting line between the first center point and the third center point is determined, and the second intersection point of the second connecting line and the boundary of the third circular area is found. And finally, drawing a second arc line with the first interval as the radius by taking the second intersection point as the circle center, so that the third electrode can be placed at the position of the third circular area, which is positioned in the area outside the second arc line. Obviously, the present embodiment designs the geometric positions of the electrodes more precisely, and further improves the detection accuracy of the biological signals.
According to a specific implementation manner of the head-mounted device of the embodiment of the present invention, the second electrode and the third electrode are symmetrically distributed with respect to the first electrode; the second electrode, the first electrode and the third electrode are on the same straight line in the horizontal direction.
According to a specific implementation manner of the bioelectrical signal acquisition device of the embodiment of the present invention, the first interval is not less than 3 cm; the second spacing is 2 cm.
In the embodiment, the second electrode, the first electrode and the third electrode are designed on the same straight line in the horizontal direction, so that comparison of left brain signals and right brain signals is facilitated, and the data volume and complexity of later-stage calculation are reduced to the maximum extent.
According to the utility model discloses a concrete implementation of head mounted device, this head mounted device is safety helmet, VR/AR/MR helmet, or VR/AR/MR glasses.
If the embodiment is used for safety helmet, then can be used to the monitoring of fatigue degree, be applied to the work environment that needs to wear the safety helmet such as industrial and mining, and have certain danger degree, installed biological signal acquisition electrode and processing chip on traditional safety helmet, mainly gather EEG signal, rhythm of the heart variability rate signal and skin sensing rate signal, the processing chip sends the signal of gathering for the distal end cloud platform as the server, the cloud platform carries out the fatigue degree monitoring, can feed back the result to user terminal.
In the embodiment, if the wearable device using VR/AR/MR, for example, the VR helmet device has wide application scenes, entertainment and education can be related. Install the biological electricity signal collection system on traditional VR equipment, gather multi-dimensional biosignals (brain electricity, rhythm of the heart, heart rate variability rate and skin sensing rate etc.), processing chip sends the signal of gathering to cloud platform through communication unit, and the cloud platform carries out corresponding discernment, for example attention identification, relaxation degree discernment, emotional recognition etc..
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic diagram of an operating principle of a data processing system formed by a head-mounted device, a server, and a user terminal according to an embodiment of the present invention;
fig. 2 is a schematic view of the mounting positions of the bioelectrical signal collecting device and the processing chip in the embodiment of the head-mounted device of the present invention, if the head-mounted device is a safety helmet;
FIG. 3 is a schematic structural diagram of a bioelectrical signal collecting device according to an embodiment of the head-mounted apparatus of the present invention;
fig. 4 is a schematic topological diagram of the first electrode, the second electrode and the third electrode on the flexible circuit board in the embodiment of the head-mounted device of the present invention;
fig. 5 is a schematic topological diagram of the first electrode, the second electrode and the third electrode on the flexible circuit board in the embodiment of the head-mounted device of the present invention;
FIG. 6 is a flowchart of the steps for second electrode position determination in the embodiment of FIG. 5;
FIG. 7 is a flowchart of the steps for third electrode position determination in the embodiment shown in FIG. 5.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Before discussing exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described
Specific structural and functional details disclosed herein are merely representative and are provided for purposes of describing example embodiments of the present invention. The invention may, however, be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be termed a second element, and, similarly, a second element may be termed a first element, without departing from the scope of example embodiments. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Referring to fig. 1, fig. 1 is a schematic diagram of an operating principle of a data processing system formed by a head-mounted device, a server, and a user terminal according to an embodiment of the present invention.
In the data processing system of fig. 1, a head-mounted device 10 is included, which performs data transmission with a server 20, for example, a cloud server, through wireless communication, for example, bluetooth, WIFI, mobile internet, and the like. After receiving the data, the server 20 analyzes and processes the obtained data, and sends the processing result to the user terminal 30 for the user to refer to, and the processing result may also include explicit prompts such as alarm information.
In particular, referring again to fig. 1, the head mounted device 10 comprises a wearing means. The wearing device includes a forehead fastening portion; the forehead fastening part is provided with a bioelectrical signal acquisition device 110; the bioelectrical signal acquisition device 110 is electrically connected to the flexible circuit board 100; the bioelectric signal acquisition device 110 comprises an electrode assembly for electroencephalogram acquisition, a first sensor for monitoring heart rate and/or heart rate variability, and a second sensor for monitoring skin conductivity. And, the head mounted device 10 further includes a communication unit 120 and a processing chip 130, and the processing chip 130 is fixed at the rear of the head mounted device and used for calculating and analyzing data detected by the electrode assembly, the first sensor and the second sensor. The communication unit 120 is disposed on the flexible circuit board 100, and is configured to send data calculated and analyzed by the processing chip 130 to the server 20 and/or the user terminal 30.
The embodiment of the utility model provides a, can realize the detection of brain electricity, rhythm of the heart variation rate and skin conductivity and the analysis based on the fusion of multiple data, can be more accurate carry on such as user's fatigue degree, user's attention, the discernment of degree of relaxing, emotion index.
As shown in fig. 1, according to an embodiment of the present invention, the head-mounted device may be a safety helmet, a VR/AR/MR helmet, or VR/AR/MR helmet glasses.
If the embodiment is used for safety helmet, then can be used to the monitoring of fatigue degree, be applied to industrial and mining etc. and need wear the safety helmet, and have the operation environment of certain danger degree, installed biological signal acquisition electrode and processing chip on traditional safety helmet, mainly gather EEG signal, heart rate variability signal and skin sensing rate signal, processing chip sends the signal of gathering for the distal end cloud platform as the server, the cloud platform carries out the fatigue degree monitoring, can feed back the result to user terminal.
In the embodiment, if the wearable device using the VR/AR/MR helmet, for example, the VR helmet device has wide application scenes, entertainment and education can be involved. Install the biological electricity signal collection system on traditional VR equipment, gather multi-dimensional biosignals (brain electricity, rhythm of the heart, heart rate variability rate and skin sensing rate etc.), processing chip sends the signal of gathering to cloud platform through communication unit, and the cloud platform carries out corresponding discernment, for example attention identification, relaxation degree discernment, emotional recognition etc..
Referring to fig. 2, fig. 2 is a schematic view of the installation positions of the bioelectrical signal collecting device and the processing chip in the embodiment of the head-mounted device of the present invention, if the head-mounted device is a safety helmet 200.
In this embodiment, the bioelectrical signal collecting device 210 is disposed at the forehead fastening portion, and in a specific implementation, the bioelectrical signal collecting device 210 is disposed on the flexible circuit board, and the processing chip is disposed at the rear portion (not shown) of the safety helmet.
When the bioelectric signal of the brain electrical signal is collected by using a head-mounted device such as a VR/AR/MR helmet, glasses, or a safety helmet, the reference electrode and the interference suppression electrode are usually disposed behind the ear, but this point is not the optimal point for brain electrical signal collection. The point location relation of the electrode points, namely the geometric distribution is not reasonable, the detection precision of the biological signals is low due to the unreasonable arrangement of the geometric positions, the calculation complexity of the biological signals is high, the requirement on the hardware performance of subsequent data processing is high, and the product cost is high.
The utility model discloses a wear-type equipment further can solve the problem of the geometric distribution of above-mentioned electrode point.
Fig. 3 is a schematic structural diagram of the bioelectrical signal collecting device in the embodiment of the head-mounted apparatus of the present invention. The bioelectrical signal collecting device is disposed on the flexible circuit board 300. The bioelectrical signal acquisition device includes an electrode assembly, a first sensor, and a second sensor.
The electrode assembly includes: a first electrode 3101, a second electrode 3102, a third electrode 3103, and a fourth electrode 3104. The first electrode 3101 is a reference electrode, and when the head mounted device is worn, the first electrode 3101 is disposed in a region near the eyebrow center. The second and third electrodes 3012 and 3013 are detection electrodes for detecting brain waves of the left and right brains, and are respectively distributed on both sides of the first electrode 3101. The fourth electrode 3104 is an interference suppression electrode, also called a right leg driving electrode, for suppressing interference of ambient electromagnetic noise.
It should be noted that fig. 3 only shows one first electrode as a reference electrode, and in fact, in practical implementation, the number of the first electrodes is not limited to one, and may be two or more, the distances between the plurality of first electrodes are relatively close, and when in a wearing state, the plurality of first electrodes are all disposed near the eyebrow center.
According to the national standard requirements, the distance between the electroencephalogram acquisition electrodes needs to meet the following requirements: the distance between the edges is not less than 3 cm. That is, the distance between the second electrode as the detection electrode and the edge of the first electrode is greater than 3cm, and the distance between the third electrode as the detection electrode and the edge of the first electrode is also greater than 3 cm. In practical implementation, a threshold value may be set for the distance between the first electrode and the edge of the second electrode or the third electrode, for example, a first interval, which may be 3cm, 4cm, or other values greater than 3 cm. The fourth electrode as the interference suppression electrode is not limited to the above distance, and may be provided at any position of the skin in principle.
As can be seen from fig. 3, in this embodiment, the flexible circuit board 300 is a T-shaped circuit board. The first electrode 3101, the second electrode 3102, the third electrode 3103, and the fourth electrode 3104 are provided on the circuit board 310 in which the T-shaped circuit board is positioned in the horizontal direction. The T-shaped circuit board is also provided with a communication unit 3105; the communication unit 3201 is located on the circuit board 320 with the T-shaped circuit board in the vertical direction, and is used for sending the bioelectrical signal data acquired by the electrode assembly and the heart rate sensor to the server, and the server analyzes and processes the bioelectrical signal data and sends the processed bioelectrical signal data to the user terminal.
In this embodiment, the second sensor is multiplexed with the electrode assembly, that is, the skin rate sensor is multiplexed with the electrode assembly for electroencephalogram acquisition.
The first sensor 3105, which is a heart rate sensor, may be a photosensor or a pressure sensor. The present invention is not limited herein. If the heart rate sensor is a pressure sensor, then: when the head-mounted device is in a wearing state, the position of the pressure sensor is an arterial blood vessel gathering position, such as a temple position. The heart rate sensor 3105 is positioned as shown in fig. 3 at the end of the T-shaped circuit board that is horizontally positioned on the circuit board 310. If the heart rate sensor is a photoelectric sensor, then: when the head-mounted device is in a wearing state, the position of the photoelectric sensor is the forehead non-shielding position, and the specific position of the photoelectric sensor on the flexible circuit board 300 in this case is not shown in fig. 3.
In the embodiment, through the geometric topological design of the electrode assembly, the heart rate sensor and the skin conductivity sensor for electroencephalogram signal acquisition, various different bioelectrical signal data can be integrated, and the current state of a user can be more accurately reflected.
It should be noted that, in the embodiment shown in fig. 3, the flexible circuit boards are all T-shaped circuit boards, but this is only an exemplary illustration, and the present invention does not limit the shape of the flexible circuit boards, and the flexible circuit boards are not necessarily T-shaped strips, but may also be other shapes, such as arcs, X-shapes, and the like.
Furthermore, it should be noted that the geometric distribution of the electrode assembly of the present invention is not necessarily as shown in the embodiment of fig. 3, and the second electrode, the first electrode, the third electrode and the fourth electrode are in a straight line. As described above, the fourth electrode as the interference suppressing electrode has no position limitation, and may be any position of the skin in principle. Therefore, in considering the geometric topology of the electrodes in the electrode assembly, the main consideration is the distribution of the first electrode, which is the ambulatory reference electrode, and the second and third electrodes, which serve to detect the brain electrical signal.
Referring to fig. 4, in order to improve the detection accuracy of the bio-signal and simplify the signal calculation complexity, in one embodiment, a first electrode 401 as a reference electrode is disposed in the area near the eyebrow center when the head-mounted device is in a wearing state; the second electrode 402 and the third electrode 403 serving as detection electrodes are disposed on both sides of the first electrode 401. The fourth electrode is an interference suppression electrode for suppressing interference of environmental electromagnetic noise, and the electrode can be arranged at any idle position of the flexible circuit board of the head-mounted device, so that the manufacture is convenient, and the electrode is not shown in the figure. In addition to the definition of the relative position, it is noted that the distance between the edges of the second electrode 402 and the third electrode 403 and the first electrode edge 401 is a predetermined interval, for example, 3 cm.
In this embodiment, the second electrode 402 and the third electrode 403 are disposed on both sides of the first electrode as the reference electrode, and the position of the fourth electrode as the interference suppression electrode is not limited. Through the technical scheme, the embodiment of the utility model provides an improve biosignal's detection precision.
Referring to fig. 5, fig. 5 is a schematic topological diagram of the first electrode, the second electrode and the third electrode on the flexible circuit board in another embodiment of the bioelectrical signal collecting apparatus for a head-mounted device according to the present invention. According to the utility model discloses bioelectricity signal acquisition device, the position of second electrode is confirmed according to following rule, and it is shown with reference to fig. 6:
with the first intersection point C as the center of the step 55A, a first arc line L1 with a first interval (e.g., 3cm) as the radius is drawn; the area of the second circular area outside the first arc is determined as the position of the second electrode, see the area shaded on the left side of fig. 5.
Similar to the determination method of the position of the third electrode, the determination rule of the third electrode is as follows, and is shown with reference to fig. 7:
a second arc L2 with a first interval (e.g., 3cm) as a radius is drawn with the second intersection E as the center of the circle at step 55B; the region of the third circular region outside the second arc line L2 is determined as the position of the third electrode, see the region shaded on the right in fig. 5.
In this embodiment, after the positions of the first electrode and the second electrode are preliminarily determined, the settable position ranges of the first electrode, the second electrode and the third electrode are determined by a predetermined second interval, such as 2cm, that is, the first electrode can be placed in any position of the first circular area, and the second electrode can be placed in any position of the second circular area; the second electrode may be located in any position of the second circular area. On the basis, in order to reduce the interference between the first electrode and the second electrode to a permissible range, the distance between the edges of the first electrode and the second electrode cannot be smaller than the first interval, for example, cannot be smaller than 3cm, therefore, in the present embodiment, the first central point and the second central point are connected, the first connecting line therebetween is determined, the first intersection point of the first connecting line and the boundary of the first circular area is found, and finally, the first arc line with the first interval as a radius is drawn with the first intersection point as a center, so that the second electrode can be placed at a position of the second circular area outside the first arc line.
Similarly, in order to reduce the interference between the first electrode and the third electrode to a permissible range, the distance between the edges of the first electrode and the third electrode cannot be smaller than the first interval, for example, cannot be smaller than 3 cm. Therefore, in this embodiment, the first center point and the third center point are connected, the second connecting line between the first center point and the third center point is determined, and the second intersection point of the second connecting line and the boundary of the third circular area is found. And finally, drawing a second arc line with the first interval as the radius by taking the second intersection point as the circle center, so that the third electrode can be placed at the position of the third circular area, which is positioned in the area outside the second arc line.
Obviously, the present embodiment designs the geometric positions of the electrodes more precisely, and further improves the detection accuracy of the biological signals.
In a more preferred embodiment, when the head-mounted device is in a wearing state, the first central point is an eyebrow center; the first electrode is attached to the first circular area; the connecting line of the second electrode and the third electrode is horizontal; the second electrode and the third electrode are symmetrically distributed relative to the first electrode.
The embodiment is suitable for a head-mounted device such as a safety helmet, a VR/AR/MR helmet, etc., when the head-mounted device is in a wearing state, the first center point is an eyebrow center, for example, the center of an eyepiece of the VR/AR/MR helmet can be selected, and since a connecting line of the second electrode and the third electrode is horizontal and the second electrode and the third electrode are symmetrically distributed relative to the first electrode, the second electrode and the third electrode form an isosceles triangle with the first electrode as a vertex. The connecting line of the second electrode and the third electrode is the bottom side of the isosceles triangle. Therefore, the embodiment optimizes the geometric position of each electrode, improves the detection precision of biological signals, and reduces the data amount and complexity of post-calculation.
In order to ensure that the first electrode 2101 is disposed in the vicinity of the eyebrow center when the head-mounted device is worn, the first electrode 2101 is disposed at or near a position where the flexible circuit board intersects the center plane.
Since the target detection position of the first electrode is at the eyebrow center, the range of the first electrode from the position can be determined according to the detection range as long as the detection range of the first electrode covers the eyebrow center.
When the interference between the electrodes is discussed, it means the interference at the actual distance between the electrodes in the wearing state of the head mounted device. Therefore, it is preferable that the distance mentioned in the above embodiments is an actual distance between the electrodes along the contact surface in the wearing state of the head-mounted device.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A head-mounted device, comprising:
a wearable device;
the wearable device includes a forehead fastening portion;
the forehead fastening part is provided with a bioelectricity signal acquisition device;
the bioelectrical signal acquisition device comprises an electrode assembly for acquiring an electroencephalogram signal, a first sensor for monitoring a heart rate and/or a heart rate variation rate, and a second sensor for monitoring skin conductivity;
the head-mounted equipment is also provided with a communication unit and a processing chip, and the processing chip is used for calculating and analyzing data obtained by detection of the electrode assembly, the first sensor and the second sensor;
the communication unit is used for sending the data calculated and analyzed by the processing chip to a server and/or a user terminal.
2. Head-mounted device according to claim 1,
the bioelectrical signal acquisition device is arranged on the flexible circuit board; the flexible circuit board is a T-shaped circuit board.
3. Head-mounted device according to claim 2,
the electrode assembly includes at least one first electrode, a second electrode, a third electrode, and a fourth electrode as reference electrodes;
the first electrode, the second electrode, the third electrode and the fourth electrode are arranged on the circuit board of the T-shaped circuit board in the horizontal direction;
when the head-mounted device is in a wearing state, the first electrode is arranged in the area near the eyebrow center; the second electrode and the third electrode are detection electrodes and are distributed on two sides of the first electrode; the fourth electrode is an interference suppression electrode and is used for suppressing the interference of environmental electromagnetic noise; and the distance between the edges of the first electrode and the second electrode is greater than a preset first interval; the distance between the first electrode and the edge of the third electrode is greater than the first spacing.
4. Head-mounted device according to claim 3,
the first sensor is a photoelectric sensor or a pressure sensor;
if the first sensor is a photoelectric sensor, then:
when the head-mounted equipment is in a wearing state, the position of the photoelectric sensor is a forehead non-shielding position;
if the first sensor is a pressure sensor, then:
the pressure sensor is positioned at one end of the T-shaped circuit board in the horizontal direction, and when the head-mounted equipment is in a wearing state, the position of the pressure sensor is an artery blood vessel gathering position.
5. Head-mounted device according to claim 4,
the second sensor is one or more electrodes in the electrode assembly, and the electrode assembly is used for realizing electroencephalogram signal acquisition and skin conductivity detection through multiplexing.
6. Head-mounted device according to claim 5,
in the electrode assembly, the position of the second electrode is determined as follows:
determining a first circular area by taking a preset first central point as a circle center and a preset second interval as a radius, wherein the first electrode is positioned in the first circular area;
determining a second circular area by taking a preset second central point as a circle center and the second interval as a radius;
connecting the first central point and the second central point to determine a first connecting line;
determining a first intersection point of the first connecting line with a boundary of the first circular area;
drawing a first arc line with the first interval as a radius by taking the first intersection point as a circle center;
determining a region of the second circular region outside the first arc as the location of the second electrode.
7. Head-mounted device according to claim 6,
in the electrode assembly, the position of the third electrode is determined as follows:
determining a third circular area by taking a preset third central point as a circle center and the second interval as a radius;
connecting the first central point and the third central point to determine a second connecting line;
determining a second intersection point of the second connecting line and the boundary of the third circular region;
drawing a second arc line with the first interval as a radius by taking the second intersection point as a circle center;
determining a region of the third circular region outside of the second arc as the location of the third electrode.
8. Head-mounted device according to claim 7,
the second electrode and the third electrode are symmetrically distributed relative to the first electrode;
the second electrode, the first electrode and the third electrode are on the same straight line in the horizontal direction.
9. Head-mounted device according to claim 8,
the first spacing is not less than 3 centimeters;
the second spacing is 2 cm.
10. Head-mounted device according to claim 1,
the head-mounted device is a safety helmet, a VR/AR/MR helmet, or VR/AR/MR glasses.
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| CN113349778A (en) * | 2021-06-03 | 2021-09-07 | 杭州回车电子科技有限公司 | Emotion analysis method and device based on transcranial direct current stimulation and electronic device |
| CN113425305A (en) * | 2021-06-09 | 2021-09-24 | 上海交通大学 | Self-adaptive active electrode for non-invasive biological signal acquisition |
| CN113855019A (en) * | 2021-08-25 | 2021-12-31 | 杭州回车电子科技有限公司 | Expression recognition method and device based on EOG, EMG and piezoelectric signals |
| CN113925509A (en) * | 2021-09-09 | 2022-01-14 | 杭州回车电子科技有限公司 | Electroencephalogram signal based attention value calculation method and device and electronic device |
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| CN113349778A (en) * | 2021-06-03 | 2021-09-07 | 杭州回车电子科技有限公司 | Emotion analysis method and device based on transcranial direct current stimulation and electronic device |
| CN113425305A (en) * | 2021-06-09 | 2021-09-24 | 上海交通大学 | Self-adaptive active electrode for non-invasive biological signal acquisition |
| CN113855019A (en) * | 2021-08-25 | 2021-12-31 | 杭州回车电子科技有限公司 | Expression recognition method and device based on EOG, EMG and piezoelectric signals |
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