CN109893129B - Dry electrode for adjusting depth by utilizing air bag and wearable electroencephalogram detection device - Google Patents
Dry electrode for adjusting depth by utilizing air bag and wearable electroencephalogram detection device Download PDFInfo
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- CN109893129B CN109893129B CN201910284509.6A CN201910284509A CN109893129B CN 109893129 B CN109893129 B CN 109893129B CN 201910284509 A CN201910284509 A CN 201910284509A CN 109893129 B CN109893129 B CN 109893129B
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Abstract
The invention discloses a dry electrode and a wearable electroencephalogram detection device which utilize an air bag to adjust the depth. For the same user, when the dry electrode is in the skull protruding position, the height of the air bag can be shortened by reducing the gas in the air bag, so that the effective length of the dry electrode can be shortened; when the dry electrode is positioned at the skull pit position, the height of the air bag can be increased by filling air into the air bag, so that the effective length of the dry electrode is increased, the dry electrode can be ensured to be fully contacted with the scalp of a user, the input impedance can be reduced, and the quality of the acquired electroencephalogram signal is improved. Aiming at different users, the height of the air bag can be changed by inflating or exhausting the air bag, so that the effective length of the dry electrode is changed, and the probe can be attached to skull with different shapes and sizes.
Description
Technical Field
The invention relates to the technical field of integrated circuits, in particular to a dry electrode for adjusting depth by utilizing an air bag and a wearable electroencephalogram detection device.
Background
The brain is an important component of the human central nervous system, is the material basis of all thought activities, integrates and records the information collected by human sense organs, and responds to stimuli. Brain nerve activity is the manifestation of activities such as thinking and cognition in humans.
There are various methods for detecting brain neural activity, among which an electroencephalogram (EEG) method is a method for directly recording the strength of an electric field in the brain using electrodes by using a discharge phenomenon during neural activity. Because EEG uses non-invasive electrodes to measure scalp electrical signals directly, it is inexpensive and has high time resolution, and thus, is widely used.
EEG has been used for automatic detection of epilepsy, stroke patient treatment, depth of anesthesia detection, sleep staging, and diagnosis and prognosis of various cerebrovascular diseases. Besides medical detection, EEG is also applied in life scenarios such as smart home, emotion recognition, fatigue detection, and the like. Because the EEG signal is weak, only several microvolts to dozens of microvolts, and the randomness is strong, the EEG signal detection device is very easy to be interfered by the external environment, and therefore, the EEG signal detection device has high requirements.
The existing electrode for detecting electroencephalogram signals is divided into a dry electrode and a wet electrode. When the wet electrode is used for detecting the electroencephalogram signals, electrode paste needs to be added between the wet electrode and the scalp to reduce impedance, and when the dry electrode is used for detecting the electroencephalogram signals, a metal probe in the dry electrode is generally used for contacting with the scalp. Because the skull sizes of different users are different, the skull of the same person is not strictly spherical, and therefore, the phenomenon that some electrodes positioned at the skull sunken positions cannot be in full contact with the scalp often occurs. Furthermore, if too much hair is present, the electrodes are difficult to contact the scalp, resulting in an excessive impedance. If the impedance is too large, the electroencephalogram signals are difficult to acquire, wrong diagnosis results are generated, and great harm is caused to the health of patients. If the user is specially customized according to the skull shape, a great amount of money and time are consumed.
Disclosure of Invention
In view of the above, the present invention provides a dry electrode and a wearable electroencephalogram detection device, which can adjust the depth of a probe at will.
Accordingly, the present invention provides a dry electrode for depth adjustment using a balloon, comprising:
the probe comprises a hollow sleeve with two wings, a probe reed positioned on one wing of the sleeve, a probe base, an inflatable air bag fixed between the probe base and the sleeve, an inflation pipeline which is communicated with the air bag, penetrates through the hollow position of the sleeve and is provided with an inflation valve, a plurality of probes fixed on one surface of the probe base, which is opposite to the air bag, a first lead with elasticity, a hollow fixed base, a lead reed positioned in the fixed base and a second lead led out from the fixed base; wherein the content of the first and second substances,
the sleeve, the air bag, the inflation pipeline, the probe base and the probes are fixedly connected to form an integral structure;
the first lead is used for electrically connecting each probe with the probe reed;
the fixed base is used for fixing the integrated structure on the electrode cap; the integrated structure penetrates through the hollow position of the fixed base;
the lead reed is electrically connected with the probe reed when the integrated structure is fixed on the electrode cap and the integrated structure rotates to a position where the probe reed and the lead reed are in mutual contact;
the second lead is used for electrically connecting the lead reed with the signal processing circuit;
after the fixing base fixes the integrated structure on the electrode cap, the integrated structure is rotated to the probe reed and the lead reed through rotating the sleeve, so that a normal working mode is realized.
In a possible implementation manner, in the above dry electrode provided by the present invention, the fixing base includes: an upper base and a lower base; wherein the content of the first and second substances,
the inner surface of the upper base is provided with internal threads, the lower base is of a bolt structure, the outer surface of the bolt structure is provided with external threads, and the internal threads and the external threads are matched for screwing the lower base into or out of the upper base;
an annular clamping plate is arranged in the upper base and used for clamping two wings of the sleeve on one side of the annular clamping plate of the upper base, which is back to the lower base;
the upper base and the lower base are hollow structures, and the integrated structure penetrates through the hollow positions of the upper base and the lower base;
the lead reed is positioned in the upper base, and the second lead is led out from the upper base.
In a possible implementation manner, in the above dry electrode provided by the present invention, the probe spring is insulated from the sleeve, and is located on a side of an airfoil of the sleeve facing the probe base; the lead reed is in a semi-annular shape, is positioned on one side of the annular clamping plate back to the lower base and is mutually insulated with the upper base;
further comprising: the first ground spring piece is positioned on one side of the other wing surface of the sleeve, which faces the probe base, and is electrically connected with the sleeve, the semi-annular second ground spring piece is positioned on one side, which is opposite to the lower base, of the annular clamping plate of the upper base, and a first ground wire which is respectively and electrically connected with the upper base and the second ground spring piece is led out from the upper base; wherein the content of the first and second substances,
the second ground spring plate and the lead spring plate are insulated from each other, and the distance between two adjacent end parts of the second ground spring plate and the lead spring plate is smaller than the width of the first ground spring plate along the circumferential direction of the annular clamping plate;
the first ground wire is electrically connected with the reference ground of the signal processing circuit;
after the upper base and the lower base are matched to fix the integrated structure on the electrode cap, the integrated structure is rotated to electrically connect the probe reed with the lead reed and electrically connect the first ground reed with the second ground reed by rotating the sleeve, so that a normal working mode is realized; or the sleeve is rotated to enable the integrated structure to rotate to the first ground reed to be electrically connected with the second ground reed and the lead reed respectively, so that a null shift calibration mode is realized.
In a possible implementation manner, in the above dry electrode provided by the present invention, each of the probes includes: the probe comprises a probe rod fixed on the probe base, a spring fixed on one side of the probe rod, which is back to the probe base, and a probe fixed on one side of the spring, which is back to the probe rod.
In a possible implementation manner, in the above dry electrode provided by the present invention, the material of the probe is a gold-plated material.
The invention also provides a wearable electroencephalogram detection device, which comprises: the electrode comprises a signal processing circuit, an electrode cap and a plurality of dry electrodes fixed on the electrode cap; wherein the content of the first and second substances,
each dry electrode is the dry electrode provided by the invention;
and holes for placing electrodes are formed at the positions of the electrode caps corresponding to the dry electrodes.
In a possible implementation manner, the electroencephalogram detection apparatus provided by the present invention further includes: a line concentration interface;
the wire collecting interface is used for collecting the second wires of the dry electrodes together.
In a possible implementation manner, in the electroencephalogram detection apparatus provided by the present invention, the first ground line of each dry electrode is integrated into one second ground line through the line concentration interface.
In a possible implementation manner, the electroencephalogram detection apparatus provided by the present invention further includes: a collar;
a power supply is arranged in the necklace;
the signal processing circuit is integrated within the collar.
According to the dry electrode and the wearable electroencephalogram detection device utilizing the air bag to adjust the depth, the probe reed on one wing of the sleeve is connected with the probe through the first lead, and the probe reed is connected with the second lead through the lead reed in the fixing base, so that when the probe is contacted with the scalp of a user to detect electroencephalogram signals of the user, the electroencephalogram signals can be transmitted to the signal processing circuit through the probe, the first lead, the probe reed, the lead reed and the second lead in sequence, and the detection of the electroencephalogram signals is realized. An inflatable air bag is clamped between the sleeve and the probe base, the sleeve, the air bag, the inflation pipeline, the probe base and the probes are of an integrated structure, the air bag is inflated or exhausted through the inflation valve, the height of the air bag can be continuously adjusted, and therefore the depth of the probes can be continuously adjusted. For the same user, when the dry electrode is positioned at the position where the skull protrudes, the height of the air bag can be shortened by reducing the gas in the air bag, so that the effective length of the dry electrode can be shortened; when the dry electrode is positioned at the position of the skull pit, the height of the air bag can be increased by filling air into the air bag, so that the effective length of the dry electrode is increased, the dry electrode can be ensured to be fully contacted with the scalp of a user, the input impedance can be reduced, and the quality of the acquired electroencephalogram signals is improved. Aiming at different users, the height of the air bag can be changed by inflating or exhausting the air bag, so that the effective length of the dry electrode is changed, and the probe can be attached to skull with different shapes and sizes.
Drawings
FIG. 1 is a schematic diagram of a dry electrode with a balloon for depth adjustment according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of the components in FIG. 1 after being disassembled;
FIG. 3a is a schematic diagram of the airbag prior to inflation;
FIG. 3b is a schematic view of the inflated airbag;
FIG. 4 is a schematic exploded view of a dry electrode with a balloon for depth adjustment according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of the wearable electroencephalogram detection device provided by the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only illustrative and are not intended to limit the present application.
The dry electrode for adjusting depth by using the air bag according to the embodiment of the present invention, as shown in fig. 1 and fig. 2 (for easy identification, fig. 2 is a structure obtained by splitting the components shown in fig. 1), includes:
a hollow sleeve 1 with two wings (A and B shown in figure 2), a probe reed 2 positioned on one wing (A shown in figure 2) of the sleeve 1, a probe base 3, an inflatable air bag 4 fixed between the probe base 3 and the sleeve 1, an inflation pipeline 5 which is communicated with the air bag 4, penetrates through the hollow position of the sleeve 1 and is provided with an inflation valve, a plurality of probes 6 fixed on one surface of the probe base 3 opposite to the air bag 4, a first elastic lead 7, a hollow fixed base 8, a lead reed 9 positioned in the fixed base 8 and a second lead 10 led out from the fixed base 8; wherein the content of the first and second substances,
the sleeve 1, the air bag 4, the inflation pipeline 5, the probe base 3 and each probe 6 are fixedly connected to form an integral structure;
the first lead 7 is used for electrically connecting each probe 6 with the probe reed 2;
the fixed base 8 is used for fixing the integrated structure on the electrode cap; as shown in fig. 1, the integrated structure penetrates the hollow position of the fixed base 8;
the lead reed 9 is used for being electrically connected with the probe reed 2 when the integrated structure is fixed on the electrode cap and rotates to the position where the probe reed 2 is contacted with the lead reed 9;
the second lead 10 is used for electrically connecting the lead reed 9 with the signal processing circuit;
after the fixing base 8 is fixed on the electrode cap with the integrated structure, the integrated structure is rotated to the probe reed 2 and the lead reed 9 through the rotating sleeve 1, and a normal working mode is realized.
In the dry electrode provided by the embodiment of the invention, the probe reed on one wing of the sleeve is connected with the probe through the first lead, and the probe reed is connected with the second lead through the lead reed in the fixed base, so that when the probe is contacted with the scalp of a user to detect an electroencephalogram signal of the user, the electroencephalogram signal can be transmitted to the signal processing circuit through the probe, the first lead, the probe reed, the lead reed and the second lead in sequence, and the detection of the electroencephalogram signal is realized. An inflatable air bag is clamped between the sleeve and the probe base, the sleeve, the air bag, the inflation pipeline, the probe base and the probes are of an integrated structure, the air bag is inflated or exhausted through the inflation valve, the height of the air bag can be continuously adjusted, and therefore the depth of the probes can be continuously adjusted. For the same user, when the dry electrode is positioned at the position where the skull protrudes, the height of the air bag can be shortened by reducing the gas in the air bag, so that the effective length of the dry electrode can be shortened; when the dry electrode is positioned at the position of the skull pit, the height of the air bag can be increased by filling air into the air bag, so that the effective length of the dry electrode is increased, the dry electrode can be ensured to be fully contacted with the scalp of a user, the input impedance can be reduced, and the quality of the acquired electroencephalogram signals is improved. Aiming at different users, the height of the air bag can be changed by inflating or exhausting the air bag, so that the effective length of the dry electrode is changed, and the probe can be attached to skull with different shapes and sizes.
In practical implementation, in the above dry electrode provided in the embodiment of the present invention, as shown in fig. 2, the first lead 7 having elasticity may be specifically implemented by being wound in a spiral structure (e.g., a telephone wire), so that, as shown in fig. 3a, the first lead 7 is in a natural state before the balloon 4 is inflated, and as shown in fig. 3b, the first lead 7 is in a stretched state after the balloon 4 is inflated. Of course, the elasticity of the first wire 7 is not limited to this implementation form, and may also be implemented by other ways that can implement elasticity, and is not limited herein.
In a specific implementation, in the dry electrode provided in the embodiment of the present invention, an inflation valve of the inflation conduit may be specifically an airtight core, and of course, may also be another structure capable of achieving inflation and preventing air leakage, which is not limited herein. Preferably, to facilitate inflation of the airbag through the inflation valve, the inflation valve of the inflation conduit is at least flush with the top end of the sleeve, i.e. the inflation valve of the inflation conduit may be just flush with the top end of the sleeve, or, as shown in fig. 1 and 2, the inflation conduit 5 may also extend out of the sleeve 1, without limitation.
In practical implementation, in the dry electrode provided in the embodiment of the present invention, as shown in fig. 1 and fig. 2, the fixing base 8 may include: an upper base 11 and a lower base 12; as shown in fig. 2, the inner surface of the upper base 11 is provided with an internal thread, the lower base 12 is a bolt structure, the outer surface of the bolt structure is provided with an external thread, and the internal thread and the external thread are matched for screwing the lower base 12 into or out of the upper base 11; an annular clamping plate 13 is arranged in the upper base 11 and used for clamping two wings of the sleeve 1 on one side of the annular clamping plate 13 of the upper base 11, which is back to the lower base 12; the upper base 11 and the lower base 12 are hollow structures, as shown in fig. 1, an integral structure penetrates through the hollow positions of the upper base 11 and the lower base 12; thus, the integrated structure can be fixed on the electrode cap through the upper base 11 and the lower base 12; lead reed 9 is located upper base 11, second wire 10 is drawn forth from upper base 11, specifically, can set up lead reed 9 and the second wire 10 with lead reed 9 electric connection in the space of upper base 11 annular splint 13 base 12 one side down dorsad, thus, be convenient for lead reed 9 and blocked at annular splint 13 probe reed 2 electric connection on the sleeve both wings of base 12 one side down dorsad, thereby can make the EEG signal that probe 6 detected loop through first wire 7, probe reed 2, lead reed 9, second wire 10 transmits for signal processing circuit, and then realize EEG signal's detection.
In specific implementation, in the dry electrode provided in the embodiment of the present invention, the fixing base is not limited to the structure that the sleeve 1 and the upper base 11 are connected through the slot and the structure that the upper base 11 and the lower base 12 are connected through the thread as shown in fig. 1 and fig. 2, and may be another structure that can fix an integrated structure on the electrode cap, which is not limited herein.
In specific implementation, as shown in fig. 2, in the dry electrode provided in the embodiment of the present invention, the probe reed 2 may be located above one wing (e.g., a shown in fig. 2) of the sleeve 1, that is, the probe reed 2 may be located on one side of the one wing (e.g., a shown in fig. 2) of the sleeve 1, which faces away from the probe base 3, so as to facilitate electrical connection between the probe reed 2 and the lead reed 9 in the upper base 11, the lead reed 9 may be disposed on an inner upper surface of the upper base 11, and thus, after the integrated structure is placed in the upper base 11, the probe reed 2 and the lead reed 9 may be in contact with each other by rotating the sleeve 1, so as to implement electrical connection; or, as shown in fig. 4 (for easy identification, fig. 4 is a disassembled structure), the probe reed 2 may also be located below one wing (a shown in fig. 4) of the sleeve 1, that is, the probe reed 2 may be located on one side of one wing (a shown in fig. 4) of the sleeve 1 facing the probe base 3, and for easy electrical connection between the probe reed 2 and the lead reed 9 in the upper base 11, the lead reed 9 may be disposed on one side of the annular clamping plate 13 of the upper base 11 facing away from the lower base 12, so that after the integrated structure is placed in the upper base 11, the probe reed 2 and the lead reed 9 may be contacted with each other by rotating the sleeve 1 to achieve electrical connection; and are not limited herein.
In practical implementation, in the dry electrode provided by the embodiment of the present invention, as shown in fig. 4, the probe reed 2 and the sleeve 1 are insulated from each other and located on one side of one wing (a shown in fig. 4) of the sleeve 1 facing the probe base 3; the lead spring 9 is in a semi-annular shape, is positioned on one side of the annular clamping plate 13 back to the lower base 12 and is mutually insulated with the upper base 11; as shown in fig. 4, the dry electrode provided in the embodiment of the present invention may further include: a first ground spring 14 located on one side of the other wing (shown as B in fig. 4) of the sleeve 1 facing the probe base 3 and electrically connected with the sleeve 1, a semi-annular second ground spring 15 located on one side of the annular clamping plate 13 of the upper base 11 facing away from the lower base 12, and a first ground wire 16 led out from the upper base 11 and electrically connected with the upper base 11 and the second ground spring 15 respectively; the second ground spring 15 and the lead spring 9 are insulated from each other, and the distance between two adjacent end parts of the second ground spring 15 and the lead spring 9 is smaller than the width of the first ground spring 14 along the circumferential direction of the annular clamping plate 13; the first ground line 16 is electrically connected to the reference ground of the signal processing circuit; after the upper base 11 and the lower base 12 are matched to fix the integrated structure on the electrode cap, the integrated structure is rotated by rotating the sleeve 1 until the probe reed 2 is electrically connected with the lead reed 9 and the first ground reed 14 is electrically connected with the second ground reed 15, so that a normal working mode is realized; or, the integral structure is rotated to the first ground reed 14 to be electrically connected with the second ground reed 15 and the lead reed 9 respectively by rotating the sleeve 1, so that the zero drift calibration mode is realized.
Specifically, in the dry electrode shown in fig. 4, after the upper base 11 and the lower base 12 are matched to fix the integrated structure on the electrode cap, the integrated structure is rotated by rotating the sleeve 1 until the probe reed 2 is electrically connected with the lead reed 9 and the first ground reed 14 is electrically connected with the second ground reed 15, the electroencephalogram signal detected by the probe 6 sequentially passes through the first lead 7, the probe reed 2, the lead reed 9 and the second lead 10 and is transmitted to the signal processing circuit, so as to realize the detection of the electroencephalogram signal and the normal working mode, meanwhile, the sleeve 1 sequentially passes through the first ground reed 14 and the second ground reed 15 and is electrically connected with the first ground wire 16, and the upper base 11 is also electrically connected with the first ground wire 16, so that the sleeve 1 and the upper base 11 can be grounded, thereby the integral shell of the dry electrode can be grounded, a relatively closed electromagnetic shielding cage is formed, and the electromagnetic field interference in the space can be effectively shielded, in addition, the sleeve 1 and the probe reed 2 are mutually insulated, and the upper base 11 and the lead reed 9 are mutually insulated, so the grounding of the sleeve 1 and the upper base 11 does not influence the detection of the probe 6, the probe reed 2 and the lead reed 9 on the electroencephalogram signals; moreover, because the distance between the two adjacent end parts of the semi-annular second ground reed 15 and the semi-annular lead reed 9 is smaller than the width of the first ground reed 14 along the circumferential direction of the annular clamping plate 13, after the upper base 11 and the lower base 12 are matched to fix the integrated structure on the electrode cap, the integrated structure can be rotated to the state that the first ground reed 14 is lapped on the second ground reed 15 and the lead reed 9 by rotating the sleeve 1, so that the first ground reed 14 is respectively electrically connected with the second ground reed 15 and the lead reed 9, namely, the first ground reed 14 electrically connects the second ground reed 15 and the lead reed 9, so that the lead reed 9 sequentially passes through the first ground reed 14, the second ground reed 15 and the first ground wire 16 to realize grounding, and an amplifying circuit in the signal processing circuit can sequentially pass through the second lead 10, the lead reed 9, the first ground reed 14 and the second ground reed 15, The first ground wire 16 is grounded, so that zero drift calibration can be performed on the amplifying circuit, and a zero drift calibration mode can be realized, while the conventional electroencephalogram signal detection device generally needs to return to a factory for zero drift calibration, so that when the dry electrode provided by the embodiment of the invention is applied to an electroencephalogram signal detection device, a zero drift self-calibration function can be realized, and the consumption of time and cost can be greatly reduced. In summary, the dry electrode provided by the embodiment of the invention is applied to an electroencephalogram signal detection device, and after the integrated structure is placed in the upper base 11, the switching between the normal working mode and the null shift calibration mode can be realized by rotating the sleeve 1, so that the operation is simple.
Preferably, in the dry electrode provided in the embodiment of the present invention, as shown in fig. 1 to 4, each probe 6 may include: a probe rod 17 fixed on the probe base 3, a spring 18 fixed on one side of the probe rod 17, which is back to the probe base 3, and a probe 19 fixed on one side of the spring 18, which is back to the probe rod 17; that is, the spring 18 is disposed at the connection position of the probe rod 17 and the probe 19, so that the probe 6 has elasticity, and thus, when the probe 6 is in full contact with the scalp of a user, discomfort caused by the probe 6 to the user can be reduced as much as possible. Of course, the elasticity of the probe is not limited to the above structure, and may be other structures capable of realizing the elasticity, and is not limited herein.
Preferably, in the dry electrode provided by the embodiment of the present invention, the material of the probe may be a gold-plated material, so that the contact resistance between the probe and the scalp of the user may be reduced.
Based on the same inventive concept, an embodiment of the present invention further provides a wearable electroencephalogram detection device, as shown in fig. 5, including: a signal processing circuit 101, an electrode cap 102, and a plurality of dry electrodes 103 fixed to the electrode cap 102; wherein, each dry electrode 103 is the above dry electrode provided in the embodiment of the present invention; holes for placing electrodes are formed in the positions, corresponding to the dry electrodes 103, of the electrode cap 102, so that probes in the dry electrodes 103 can penetrate through the holes to be in direct contact with the scalp of a user to detect electroencephalogram signals.
According to the electroencephalogram detection device provided by the embodiment of the invention, the probe reed on one wing of the sleeve in the dry electrode is connected with the probe through the first lead, and the probe reed is connected with the second lead through the lead reed in the fixed base, so that when the probe is contacted with the scalp of a user to detect an electroencephalogram signal of the user, the electroencephalogram signal can be transmitted to the signal processing circuit through the probe, the first lead, the probe reed, the lead reed and the second lead in sequence, and the detection of the electroencephalogram signal is realized. An inflatable air bag is clamped between the sleeve and the probe base, the sleeve, the air bag, the inflation pipeline, the probe base and the probes are of an integrated structure, the air bag is inflated or exhausted through the inflation valve, the height of the air bag can be continuously adjusted, and therefore the depth of the probes can be continuously adjusted. For the same user, when the dry electrode is positioned at the position where the skull protrudes, the height of the air bag can be shortened by reducing the gas in the air bag, so that the effective length of the dry electrode can be shortened; when the dry electrode is positioned at the position of the skull pit, the height of the air bag can be increased by filling air into the air bag, so that the effective length of the dry electrode is increased, the dry electrode can be ensured to be fully contacted with the scalp of a user, the input impedance can be reduced, and the quality of the acquired electroencephalogram signals is improved. Aiming at different users, the height of the air bag can be changed by inflating or exhausting the air bag, so that the effective length of the dry electrode is changed, and the probe can be attached to skull with different shapes and sizes.
Preferably, as shown in fig. 5, the electroencephalogram detection apparatus provided in the embodiment of the present invention may further include: a hub interface 104; the wire collecting interface 104 is used for collecting the second leads of the dry electrodes 103 together, and the collected signal wires are shown as 105 in fig. 5, so that the wiring of the electroencephalogram detection device can be reduced, and the structure of the electroencephalogram detection device can be simplified.
Further, in the electroencephalogram detection device provided in the embodiment of the present invention, as shown in fig. 5, the first ground lines of the respective dry electrodes 103 may also be integrated into one second ground line 106 through the collection interface 104, so that the wiring of the electroencephalogram detection device may be further reduced, and the structure of the electroencephalogram detection device may be further simplified.
Preferably, in the electroencephalogram detection apparatus provided in the embodiment of the present invention, as shown in fig. 5, the apparatus may further include: a collar 107; a power supply 108 is arranged in the collar 107; the signal processing circuit 101 is integrated in the collar 107, and the signal processing circuit 101 can transmit the detection data to an external computer through wireless transmission, such as bluetooth; thus, the distance between the signal processing circuit 101 and the electrode cap 102 can be shortened, the lengths of the signal line 105 and the second ground 106 led out from the line concentration interface 104 can be shortened, and the electromagnetic interference on the electroencephalogram detection device can be reduced; in addition, the power supply 108 arranged in the collar 107 can also enable the electroencephalogram detection device to realize the function of carrying power supply, thereby prolonging the standby time.
According to the dry electrode and the wearable electroencephalogram detection device utilizing the air bag to adjust the depth, the probe reed on one wing of the sleeve is connected with the probe through the first lead, and the probe reed is connected with the second lead through the lead reed in the fixing base, so that when the probe is contacted with the scalp of a user to detect electroencephalogram signals of the user, the electroencephalogram signals can be transmitted to the signal processing circuit through the probe, the first lead, the probe reed, the lead reed and the second lead in sequence, and the detection of the electroencephalogram signals is achieved. An inflatable air bag is clamped between the sleeve and the probe base, the sleeve, the air bag, the inflation pipeline, the probe base and the probes are of an integrated structure, the air bag is inflated or exhausted through the inflation valve, the height of the air bag can be continuously adjusted, and therefore the depth of the probes can be continuously adjusted. For the same user, when the dry electrode is positioned at the position where the skull protrudes, the height of the air bag can be shortened by reducing the gas in the air bag, so that the effective length of the dry electrode can be shortened; when the dry electrode is positioned at the position of the skull pit, the height of the air bag can be increased by filling air into the air bag, so that the effective length of the dry electrode is increased, the dry electrode can be ensured to be fully contacted with the scalp of a user, the input impedance can be reduced, and the quality of the acquired electroencephalogram signals is improved. Aiming at different users, the height of the air bag can be changed by inflating or exhausting the air bag, so that the effective length of the dry electrode is changed, and the probe can be attached to skull with different shapes and sizes.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A dry electrode for depth adjustment using a balloon, comprising:
the probe comprises a hollow sleeve with two wings, a probe reed positioned on one wing of the sleeve, a probe base, an inflatable air bag fixed between the probe base and the sleeve, an inflation pipeline which is communicated with the air bag, penetrates through the hollow position of the sleeve and is provided with an inflation valve, a plurality of probes fixed on one surface of the probe base, which is opposite to the air bag, a first lead with elasticity, a hollow fixed base, a lead reed positioned in the fixed base and a second lead led out from the fixed base; wherein the content of the first and second substances,
the sleeve, the air bag, the inflation pipeline, the probe base and the probes are fixedly connected to form an integral structure;
the first lead is used for electrically connecting each probe with the probe reed;
the fixed base is used for fixing the integrated structure on the electrode cap; the integrated structure penetrates through the hollow position of the fixed base;
the lead reed is electrically connected with the probe reed when the integrated structure is fixed on the electrode cap and the integrated structure rotates to a position where the probe reed and the lead reed are in mutual contact;
the second lead is used for electrically connecting the lead reed with the signal processing circuit;
after the fixing base fixes the integrated structure on the electrode cap, the integrated structure is rotated to electrically connect the probe reed and the lead reed by rotating the sleeve, so that a normal working mode is realized;
the unable adjustment base includes: an upper base and a lower base; the inner surface of the upper base is provided with internal threads, the lower base is of a bolt structure, the outer surface of the bolt structure is provided with external threads, and the internal threads and the external threads are matched for screwing the lower base into or out of the upper base; an annular clamping plate is arranged in the upper base and used for clamping two wings of the sleeve on one side of the annular clamping plate of the upper base, which is back to the lower base; the upper base and the lower base are hollow structures, and the integrated structure penetrates through the hollow positions of the upper base and the lower base; the lead reed is positioned in the upper base, and the second lead is led out of the upper base;
the probe reed and the sleeve are mutually insulated and are positioned on one side of one airfoil surface of the sleeve, which faces the probe base; the lead reed is in a semi-annular shape, is positioned on one side of the annular clamping plate back to the lower base and is mutually insulated with the upper base;
the dry electrode further comprises: the first ground spring piece is positioned on one side of the other wing surface of the sleeve, which faces the probe base, and is electrically connected with the sleeve, the semi-annular second ground spring piece is positioned on one side, which is opposite to the lower base, of the annular clamping plate of the upper base, and a first ground wire which is respectively and electrically connected with the upper base and the second ground spring piece is led out from the upper base; the second ground spring plate and the lead spring plate are insulated from each other, and the distance between two adjacent end parts of the second ground spring plate and the lead spring plate is smaller than the width of the first ground spring plate along the circumferential direction of the annular clamping plate; the first ground wire is electrically connected with the reference ground of the signal processing circuit;
after the upper base and the lower base are matched to fix the integrated structure on the electrode cap, the integrated structure is rotated to electrically connect the probe reed with the lead reed and electrically connect the first ground reed with the second ground reed by rotating the sleeve, so that a normal working mode is realized; or the sleeve is rotated to enable the integrated structure to rotate to the first ground reed to be electrically connected with the second ground reed and the lead reed respectively, so that a null shift calibration mode is realized.
2. The dry electrode of claim 1, wherein each of the probes comprises: the probe comprises a probe rod fixed on the probe base, a spring fixed on one side of the probe rod, which is back to the probe base, and a probe fixed on one side of the spring, which is back to the probe rod.
3. A dry electrode according to claim 1 or claim 2, wherein the probe material is gold plated.
4. The utility model provides a wearing formula brain electricity detection device which characterized in that includes: the electrode comprises a signal processing circuit, an electrode cap and a plurality of dry electrodes fixed on the electrode cap; wherein the content of the first and second substances,
each of the dry electrodes is a dry electrode according to any one of claims 1 to 3;
and holes for placing electrodes are formed at the positions of the electrode caps corresponding to the dry electrodes.
5. The electroencephalogram detection apparatus of claim 4, further comprising: a line concentration interface;
the wire collecting interface is used for collecting the second wires of the dry electrodes together.
6. The electroencephalography detection apparatus of claim 5, wherein the first ground of each of the dry electrodes is integrated into a second ground through the hub interface.
7. The electroencephalogram detection apparatus of any one of claims 4 to 6, further comprising: a collar;
a power supply is arranged in the necklace;
the signal processing circuit is integrated within the collar.
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| CN201910284509.6A CN109893129B (en) | 2019-04-10 | 2019-04-10 | Dry electrode for adjusting depth by utilizing air bag and wearable electroencephalogram detection device |
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| CN201910284509.6A CN109893129B (en) | 2019-04-10 | 2019-04-10 | Dry electrode for adjusting depth by utilizing air bag and wearable electroencephalogram detection device |
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| CN109893129B true CN109893129B (en) | 2020-05-05 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110680311B (en) * | 2019-08-30 | 2020-11-03 | 北京航空航天大学 | Dry electrode brain electricity collection system |
| CN111436930A (en) * | 2020-03-05 | 2020-07-24 | 开封市学国生物科技有限公司 | Noise-proof multi-point contact elastic electrode cap |
| CN112401881B (en) * | 2020-10-27 | 2021-08-10 | 北京航空航天大学 | Wearable fNIRS brain imaging system |
| CN113456080B (en) * | 2021-05-25 | 2024-06-11 | 北京机械设备研究所 | Dry and wet general type sensing electrode and application method thereof |
| CN113274027B (en) * | 2021-06-17 | 2022-07-05 | 复旦大学 | In-vivo multichannel electroencephalogram signal recording device |
| CN113261979B (en) * | 2021-07-19 | 2021-10-08 | 季华实验室 | Tinnitus identification system based on electroencephalogram signals |
| CN115153564A (en) * | 2022-08-01 | 2022-10-11 | 天津大学 | Non-invasive ultrahigh-density electroencephalogram acquisition electrode |
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| CN104840185A (en) * | 2015-04-27 | 2015-08-19 | 苏州美一点智能科技有限公司 | Skin tester |
| CN107595283A (en) * | 2017-09-28 | 2018-01-19 | 中国科学院电子学研究所 | Separate type brain electrical dry electrode |
| CN207412162U (en) * | 2017-05-02 | 2018-05-29 | 臧大维 | New EEG signals read the helmet |
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| CN104840185A (en) * | 2015-04-27 | 2015-08-19 | 苏州美一点智能科技有限公司 | Skin tester |
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