CN116172583A - Flexible electrode for collecting dual-mode signals and preparation method and application thereof - Google Patents
Flexible electrode for collecting dual-mode signals and preparation method and application thereof Download PDFInfo
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- A61B5/25—Bioelectric electrodes therefor
- A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
- A61B5/296—Bioelectric electrodes therefor specially adapted for particular uses for electromyography [EMG]
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Abstract
The invention belongs to the technical field related to flexible wearable equipment, and discloses a flexible electrode for collecting dual-mode signals, a preparation method and application thereof, wherein the flexible electrode comprises a first electrode layer, an insulating film, a flexible medium layer, a second electrode layer, a flexible insulating layer and a myoelectric electrode layer, the insulating films are respectively arranged on two opposite surfaces of the flexible medium layer, and the first electrode layer and the second electrode layer are respectively arranged on the surfaces, far away from the flexible medium layer, of the two insulating films; the flexible insulating layer is arranged on the surface of the second electrode layer away from the insulating film; the myoelectricity electrode layer is arranged on one side of the flexible insulating layer, which is far away from the second electrode layer. The invention can realize dual-mode sensing, higher skin conformality and good biocompatibility.
Description
Technical Field
The invention belongs to the technical field of flexible wearable equipment, and particularly relates to a flexible electrode for acquiring dual-mode signals, and a preparation method and application thereof.
Background
A flexible wearable device generally refers to an electronic device or apparatus that is mechanically flexible and capable of directly or indirectly conforming to the skin. The flexible wearable device has larger mechanical flexibility, can adapt to different working environments to a certain extent, and meets the deformation requirement of a human body on the device. Currently, research applications of flexible wearable devices have entered into many aspects of human daily life, such as electronic skin, wearable physiological monitoring and treatment devices, flexible conductive fabrics, flexible circuit boards, and the like. The flexible wearable device is very rapidly developed in the biomedical field and the military field, and portable and diversified acquisition of various human body signals becomes a main direction of research and becomes an important auxiliary means for future medical diagnosis and a main foundation for development of exoskeleton flexible devices.
The monitoring of human motion signals is a key problem of research in the past, human body structures have the characteristics of redundancy, complexity, variable stiffness and the like, and in order to collect human motion signals, researchers have adopted methods such as joint angle measurement, optical capturing systems, EMG measurement, electrical impedance imaging, ultrasonic processing and the like, and the human motion signal detection methods can represent the human motion state in a certain aspect. In the traditional joint angle measurement, a mark point is stuck on a human body measurement part, a camera is adjusted, and angle information is obtained by utilizing a three-dimensional coordinate algorithm, but the rigid structure of the joint angle measurement can prevent normal movement of a human body and is greatly limited by a site; EMG can be used for predicting the movement type and reflecting the muscle force by attaching the EMG on the surface of the muscle to collect the myoelectricity surface signal, but the surface myoelectricity signal is complex and has low signal to noise ratio, effective information is required to be extracted by a processing mode such as filtering and rectifying integral, and the error is large; the electrical impedance imaging reconstructs the deformation mode of the muscle by measuring the impedance change of the section of the muscle, has a relatively complete calculation algorithm, but has small measured azimuth angle, and electrodes are needed to be added when the measuring range is enlarged, so that the motion state is influenced. And most of the sensors can only collect one motion signal, and human motion characteristics are often related to various signals, so that the current flexible wearable equipment is difficult to meet the collection requirement of multimode signals, and the processing technology is complex, so that the manufacturing requirements of economy, low cost and high yield are difficult to meet.
Disclosure of Invention
Aiming at the technical problems of the existing flexible wearable equipment such as single-mode signal acquisition, complex structure, poor adhesion and the like, the invention provides a flexible electrode for acquiring a dual-mode signal, and a preparation method and application thereof, and the flexible electrode can realize dual-mode sensing, higher skin conformality and good biocompatibility through structural design.
In order to achieve the above object, according to one aspect of the present invention, there is provided a flexible electrode for simultaneously collecting muscle deformation and electromyographic signals, the flexible electrode including a first electrode layer, an insulating film, a flexible dielectric layer, a second electrode layer, a flexible insulating layer, and an electromyographic electrode layer, wherein the insulating films are respectively disposed on two opposite surfaces of the flexible dielectric layer, and the first electrode layer and the second electrode layer are respectively disposed on surfaces of the two insulating films away from the flexible dielectric layer; the flexible insulating layer is arranged on the surface of the second electrode layer away from the insulating film; the myoelectricity electrode layer is arranged on one side of the flexible insulating layer, which is far away from the second electrode layer.
Further, the flexible insulating layer is provided with a groove, and the groove is used for fixing the myoelectricity electrode layer.
Further, the number of the grooves and the number of the myoelectricity electrode layers are two, and the two grooves are respectively used for fixing the two myoelectricity electrode layers; the myoelectricity electrode layer is prepared by mixing a flexible substrate material and a conductive material.
Further, the flexible medium layer is obtained by soaking the flexible porous foam material in a preset solution, filling the pores of the flexible porous foam material with the preset solution, and then drying at constant temperature.
Further, the porous flexible material is composed of a flexible porous material doped with a conductive material.
Further, the flexible insulating layer has a modulus of elasticity greater than that of the myoelectric electrode layer.
Further, the thickness of the flexible insulating layer is 1-2mm, and the elastic modulus is more than 10MPa.
The invention also provides a preparation method of the flexible electrode for collecting the dual-mode signals, which comprises the following steps:
(1) Soaking the flexible porous foam material in a preset solution, and then drying at constant temperature to obtain a flexible medium layer;
(2) Respectively preparing insulating films on two surfaces of the flexible medium layer, which are opposite to each other, and respectively attaching a first electrode layer and a second electrode layer on the two insulating films;
(3) Preparing a flexible insulating layer through a die, and pouring an Eclflex30 solution doped with conductive filler into a groove of the flexible insulating layer to obtain a myoelectric electrode layer;
(4) And arranging a flexible insulating layer on the second electrode layer to obtain the flexible electrode.
Further, the method further comprises the step of disposing a circuit board on a surface of the first electrode layer remote from the insulating film; the flexible porous foam material is polyurethane sponge, and the preset solution is copper calcium titanate solution or PEDOT: PSS aqueous solution; the mass ratio of the PDMS solution body to the catalyst is 10:1.
the invention also provides application of the flexible electrode for acquiring the dual-mode signal in wearable equipment.
In general, compared with the prior art, the flexible electrode for acquiring the dual-mode signals, and the preparation method and application thereof mainly have the following beneficial effects:
1. the flexible electrode comprises a first electrode layer, a flexible medium layer, a second electrode layer, a flexible insulating layer and a myoelectricity electrode layer, wherein the first electrode layer, the flexible medium layer, an insulating film on the surface of the flexible medium layer and the second electrode layer form a multi-stage parallel plate capacitor, the flexible medium layer uses a porous flexible material to reduce the elastic modulus, is doped with a conductive substance to improve the dielectric constant, the insulating film separates the medium layer from the first electrode layer and the second electrode layer to form a serial parallel plate capacitor, and when muscles expand or contract, muscle force presses the flexible medium layer, the distance between the electrode plates changes, so that the size of the parallel plate capacitor is changed, and a transmission signal through the copper wire changes; meanwhile, the myoelectricity electrode layer is used for collecting myoelectricity signals, so that the flexible electrode can collect muscle deformation and the myoelectricity signals at the same time.
2. The flexible insulating layer is provided with a groove, the groove is used for fixing the myoelectricity electrode layer, slippage of the myoelectricity electrode on the skin surface is reduced, so that compression deformation generated by muscle deformation is guaranteed to be basically borne by the flexible dielectric layer while the myoelectricity electrode layer can be well fixed, deformation of the myoelectricity electrode layer in the direction perpendicular to the skin surface is reduced, and action potential generated in muscle fibers in the movement process is fed back truly.
3. The flexible dielectric layer is prepared by doping conductive filler with flexible material to improve dielectric constant and reduce elastic modulus.
4. The myoelectricity electrode layer is formed by using a flexible material doped conductive filler as a raw material and curing the conductive filler by using a deposition molding method, and the prepared myoelectricity electrode has good contact impedance with skin, has higher skin conformality and biocompatibility, and can improve the stability and reliability of myoelectricity signal detection.
5. The elastic modulus of the flexible insulating layer is far greater than that of the myoelectricity electrode, deformation of the myoelectricity electrode in the direction perpendicular to the surface of the skin is reduced, and stability and accuracy of muscle deformation signals and myoelectricity signals are guaranteed.
6. The mass ratio of the prepared PDMS solution body to the catalyst is 10:1, the elastic modulus after solidification is ensured to be 20MPa and is far greater than that of the myoelectricity electrode layer, so that when a muscle deformation signal is transmitted upwards, the deformation of the myoelectricity electrode layer in the direction vertical to the surface of the skin is reduced, and the stability and accuracy of the myoelectricity signal are improved.
Drawings
FIG. 1 is a schematic diagram of a flexible electrode for acquiring dual mode signals according to the present invention;
fig. 2 (a) and (b) are schematic diagrams of monitoring mechanism of muscle deformation according to embodiments of the present invention;
FIG. 3 is a schematic diagram of a surface electromyographic signal monitoring mechanism;
FIG. 4 is a schematic illustration of a flexible dielectric layer;
FIG. 5 is a schematic view of a myoelectric electrode layer and a flexible insulating layer;
FIG. 6 is a flow chart of a method of making a flexible electrode;
FIG. 7 is a flowchart of the operation of the detection unit in simultaneously acquiring muscle deformation and myoelectric signals;
FIG. 8 is a signal representative of the muscle deformation obtained in accordance with the present invention;
fig. 9 is a schematic diagram of the electromyographic signals obtained by the present invention.
The same reference numbers are used throughout the drawings to reference like elements or structures, wherein: 1-circuit board, 2-first electrode layer, 3-insulating film, 4-flexible dielectric layer, 5-second electrode layer, 6-flexible insulating layer, 7-myoelectric electrode layer, 8-copper wire, 9-flexible electrode, 10-skeletal muscle, 11-bone, 12-neuron and muscle fiber.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The monitoring of human motion signals is a key problem of research in the past, human body structures have the characteristics of redundancy, complexity, variable stiffness and the like, and in order to collect human motion signals, researchers have adopted methods such as joint angle measurement, optical capturing systems, EMG measurement, electrical impedance imaging, ultrasonic processing and the like, and the human motion signal detection methods can represent the human motion state in a certain aspect. In the traditional joint angle measurement, a mark point is stuck on a human body measurement part, a camera is adjusted, and angle information is obtained by utilizing a three-dimensional coordinate algorithm, but the rigid structure of the joint angle measurement can prevent normal movement of a human body and is greatly limited by a site; EMG can be used for predicting the movement type and reflecting the muscle force by attaching the EMG on the surface of the muscle to collect the myoelectricity surface signal, but the surface myoelectricity signal is complex and has low signal to noise ratio, effective information is required to be extracted by a processing mode such as filtering and rectifying integral, and the error is large; the electrical impedance imaging reconstructs the deformation mode of the muscle by measuring the impedance change of the section of the muscle, has a relatively complete calculation algorithm, but has small measured azimuth angle, and electrodes are needed to be added when the measuring range is enlarged, so that the motion state is influenced. And most of the sensors can only collect one motion signal, and human motion characteristics are often related to various signals, so that multimode information sensing, high flexibility and biocompatibility are key to the current flexible electronic breakthrough.
Referring to fig. 1, 2 and 3, based on the above, the present invention provides a flexible electrode 9 for collecting dual-mode signals, where the flexible electrode 9 can collect muscle deformation and electromyographic signals simultaneously. The flexible electrode 9 comprises a circuit board 1, a first electrode layer 2, an insulating film 3, a flexible dielectric layer 4, a second electrode layer 5, a flexible insulating layer 6, a myoelectricity electrode layer 7 and a copper wire 8. The two opposite surfaces of the flexible medium layer 4 are respectively provided with an insulating film 3, and the surfaces, far away from the flexible medium layer 4, of the two insulating films 3 are respectively provided with the first electrode layer 2 and the second electrode layer 5. The circuit board 1 is disposed on a surface of the first electrode layer 2 remote from the insulating film 3. The flexible insulating layer 6 is provided on the surface of the second electrode layer 5 remote from the insulating film 3. The myoelectric electrode layer 7 is arranged on the side of the flexible insulating layer 6 remote from the second electrode layer 5. The myoelectricity electrode layer 7 is in signal transmission with other elements through the copper wire 8.
Wherein fig. 2 shows the arrangement of the flexible electrodes and the state of the skeletal muscle 10 and bone 11 during the flexible transformation. In fig. 3, neurons and muscle fibers 12 are shown, the neurons transmitting neural signals to the muscle fibers, generating action potentials, and the volume conductors formed through the muscles, subcutaneous tissue and skin being monitored by myoelectric electrodes.
Referring to fig. 7, 8 and 9, in the present embodiment, the bottom of the circuit board is provided with an insulating base, and the insulating base is formed after curing by using PMDS or Ecoflex. The flexible dielectric layer is prepared by taking a flexible material doped conductive material as a raw material in a filling mode so as to improve the dielectric constant and reduce the elastic modulus.
The flexible insulating layer is used for decoupling muscle deformation and electromyographic signals, transmitting muscle deformation signals upwards to the flexible dielectric layer without damage, and is also used for fixing the electromyographic electrode layer, so that slippage of the electromyographic electrode layer on the surface of the skin is reduced, and the elastic modulus of the flexible insulating layer is far greater than that of the electromyographic electrode layer, so that deformation of the electromyographic electrode layer in the direction perpendicular to the surface of the skin is reduced, and stability and accuracy of the muscle deformation signals and the electromyographic signals are ensured.
The myoelectricity electrode layer is prepared by mixing a flexible substrate material and a conductive material, is in direct contact with skin, collects action potential in muscle fibers, and has low skin contact resistance and high biocompatibility; during the signal acquisition process, the device always keeps good conformal contact with the skin surface, and motion artifact is reduced. Copper wires are led out from the first electrode layer and the second electrode layer respectively and used for transmitting muscle deformation signals; copper wires are led out from two measuring electrodes of the myoelectricity electrode layer respectively and used for transmitting myoelectricity signals.
The flexible insulating layer is connected with the second electrode layer through the silica gel binder, the structure not only can collect muscle deformation signals, but also can collect electromyographic signals, good contact between the flexible insulating layer and skin can be ensured, and collection of high-quality muscle movement signals is ensured.
The flexible dielectric layer, the micron-sized insulating film on the surface of the flexible dielectric layer and the second electrode layer form a multistage parallel plate capacitor, and porous flexible materials are arranged in the preparation raw materials of the flexible dielectric layer so as to reduce the elastic modulus and improve the dielectric constant by doping conductive substances.
The flexible dielectric layer, the first electrode layer and the second electrode layer are separated by the insulating film to form a serial parallel plate capacitor, when the muscles expand or contract, the muscle force presses the flexible dielectric layer, the distance between the electrode plates changes, and therefore the size of the parallel plate capacitor is changed, and transmission signals through the copper wires change.
The two myoelectricity electrode layers form two measuring electrodes for myoelectricity signal acquisition, are prepared by adopting a flexible silicon rubber material doped conductive filler mode, have good biocompatibility and skin conformality, are embedded into grooves of the flexible insulating layer, reduce deformation of the myoelectricity electrode layers in the direction perpendicular to the surface of the skin when the myoelectricity electrode layers acquire the myoelectricity signals, reduce coupling of dual-mode signals, form volume conductors with the skin, subcutaneous tissues, muscles and the like to monitor action potentials generated in muscle fibers, and perform signal transmission through the copper wires.
In one embodiment, the flexible medium layer, the first electrode layer and the second electrode layer form a parallel plate capacitance model for acquiring muscle deformation signals; the thickness of the flexible medium layer is 3-5mm, the elastic modulus is less than 100KPa, preferably the elastic modulus is 80KPa, the flexible medium layer is strip-shaped, is easier to attach to the surface of the myoabdominal, is used for absorbing deformation generated by muscle deformation, and common materials conforming to the characteristics include Ecoflex30 condensate, polyurethane sponge, polyvinyl alcohol gel and the like.
Referring to fig. 4, in one embodiment, the flexible dielectric layer is obtained by immersing the flexible porous foam material in a preset solution, filling the pores of the flexible porous foam material with the preset solution, and then drying at constant temperature. The preset solution can be copper calcium titanate solution or PEDOT: PSS aqueous solution, in order to avoid the problem that a parallel plate capacitor is broken down, the upper surface and the lower surface of the flexible medium layer are respectively coated with a layer of micron-sized insulating film by using fast-curing silicone rubber as a raw material and a bar coating method, and the fast-curing silicone rubber can be Ecoflex35 solution.
In one embodiment, the first electrode layer and the second electrode layer are wired out using soldering or conductive silver paste to access a circuit board. The first electrode layer and the second electrode layer are prepared from conductive fabrics, so that the conductive fabric has good conductivity, is light and thin, is easy to cut, has high flexibility and the like, and improves the adhesiveness of the surface of a human body.
In one embodiment, the flexible insulating layer is formed by curing a PDMS solution in a pre-mold, and two grooves are reserved on the lower surface for fixing the myoelectric electrode layer. The thickness of the flexible insulating layer is 1-2mm, the elastic modulus is more than 10MPa, preferably the elastic modulus is 20MPa, the shape is unified with the flexible dielectric layer, and the flexible insulating layer is strip-shaped and is far greater than the elastic modulus of the myoelectricity electrode layer, so that the accuracy of muscle deformation signals is ensured, the muscle deformation signals and the myoelectricity signals are decoupled through the self-insulating characteristic, and the signal to noise ratio of dual-mode signal sensing is improved. The flexible insulating layer with the structure can well fix the myoelectric electrode layer, and meanwhile ensures that compression deformation generated by muscle deformation is basically borne by the flexible dielectric layer, so that deformation of the myoelectric electrode layer in the direction perpendicular to the surface of the skin is reduced, and action potential generated in muscle fibers in the movement process is fed back truly.
In one embodiment, referring to fig. 5, the myoelectricity electrode layer is formed by using a flexible material doped with a conductive filler as a raw material and curing the conductive filler by using a deposition molding method, preferably, the flexible material uses a PMDS solution or an Ecoflex30 solution, the conductive filler uses a carbon nanotube or a silver nanowire, the solution which is uniformly mixed is poured into a reserved groove of the flexible insulating layer, the myoelectricity electrode layer is obtained after curing, and the deformation of the myoelectricity electrode layer in the direction vertical to the skin surface when the myoelectricity electrode layer collects myoelectricity signals is reduced so as to reduce dual-mode signal coupling, thereby ensuring the safety, stability and accuracy of collecting the myoelectricity signals. Meanwhile, the myoelectric electrode prepared from the material and the skin only have good contact impedance, have higher skin conformality and biocompatibility, and can improve the stability and reliability of myoelectric signal detection.
The myoelectricity electrode layer has a thickness of 0.5-0.8mm, an elastic modulus of less than or equal to 100KPa, a surface resistance of less than 20 Ω/sq, a skin contact resistance of less than 100KΩ under 100Hz frequency test conditions, and a surface resistance change of less than 5% when the strain rate is greater than 30%. Preferably, the elastic modulus of the myoelectricity electrode layer is 100KPa, the surface resistance is 10 omega/sq, the skin contact resistance is 80KΩ under the test condition of 100Hz frequency, the strain rate is 50%, and the structure can be well attached to the extending direction of muscles, so that the accuracy of myoelectricity signal detection is improved.
The flexible insulating layer with the myoelectricity electrode layer is connected with the second electrode layer through a silica gel adhesive, the structure can ensure that muscle deformation signals are transmitted to the flexible medium layer upwards, and ensure that the myoelectricity electrode layer and skin keep good common contact, so that the generation of motion artifacts is reduced.
Referring to fig. 6, the present invention further provides a method for preparing the flexible electrode for collecting dual-mode signals, which mainly comprises the following steps:
s1: the flexible porous foam material is placed into a preset solution for soaking, and the ultrasonic container is used for full oscillation.
Preferably, the flexible porous foam material is polyurethane sponge, the preset solution is copper calcium titanate solution or PEDOT: PSS aqueous solution, and the oscillation time is 40min.
S2: and taking out the flexible porous foam material, and standing for 1 hour in a constant temperature drying oven to obtain a flexible medium layer.
Preferably, the thickness of the flexible medium layer is 3-5mm, the elastic modulus is 80KPa, and the flexible medium layer is strip-shaped, so that the flexible medium layer can be well attached to the surface of the myo-abdominal region.
S3: and (3) coating Ecoflex35 solution on the upper and lower surfaces of the flexible dielectric layer to form a flexible insulating layer, and attaching the first electrode layer and the second electrode layer.
Preferably, the Ecoflex35 solution is applied using bar coating, ensuring that the insulating surface formed is sufficiently flexible and as resistant to dielectric constant reduction as possible, and that the parallel plate capacitance formed is not broken down during acquisition of muscle deformation signals.
Preferably, the materials of the first electrode layer and the second electrode layer are cut by using conductive fabrics, so that the conductive fabric has good conductivity, and meanwhile, the conductive fabric can ensure that the whole size is light and thin and has good fit with the surface of a human body.
S4: and pouring the prepared PDMS solution into a prefabricated mold, and curing to form the flexible insulating layer.
Preferably, the prefabricated mold is manufactured by using a 3D printing process, so that the processing difficulty is reduced.
Preferably, the mass ratio of the bulk of the prepared PDMS solution to the catalyst is 10:1, the elastic modulus after solidification is ensured to be 20MPa and is far greater than that of the myoelectricity electrode layer, so that when a muscle deformation signal is transmitted upwards, the deformation of the myoelectricity electrode layer in the direction vertical to the surface of the skin is reduced, and the stability and accuracy of the myoelectricity signal are improved.
Preferably, a groove is reserved on the lower surface of the flexible insulating layer and is used for curing and forming the myoelectricity electrode layer.
S5: and preparing Eclflex30 solution, doping conductive filler, pouring into the groove of the flexible insulating layer, and waiting for solidification to form the myoelectricity electrode layer.
Preferably, the conductive filler uses carbon nano tubes or silver nano wires, the mass fraction of the conductive filler in the Ecoflex30 solution is 4-8wt%, such as 4.5wt%, 5wt%, 6wt% or 8wt%, and the myoelectric electrode layer using the material has good skin contact impedance, so that the accuracy and stability of myoelectric signal acquisition are ensured.
Preferably, the myoelectricity electrode layer has a thickness of 0.5-0.8mm, a narrow strip shape, a spacing of 2-3cm, an elastic modulus of 100KPa, a surface resistance of 10 Ω/sq, a skin contact resistance of 80KΩ under 100Hz frequency test conditions, and a strain rate of 50%, so as to ensure good adhesion to the muscle extension direction.
Preferably, the temperature of the myoelectricity electrode layer is 40-80 ℃ when the myoelectricity electrode layer is cured, and the time is 20-60 minutes.
S6: and connecting the flexible insulating layer with the second electrode layer by using a silica gel adhesive to obtain the flexible electrode body.
Preferably, the flexible electrode adopting the structure can stably collect the electromyographic signals and simultaneously transmit the muscle deformation signals to the flexible medium layer in an upward way completely, has good flexibility and excellent biocompatibility, and avoids damaging the skin during long-time signal collection.
The invention also provides application of the flexible electrode for acquiring the dual-mode signal in wearable equipment.
In summary, the flexible electrode of the invention firstly uses a layered structure to collect muscle deformation signals and myoelectric signals, the contact resistance between the myoelectric electrode layer and skin is low, the flexible electrode layer has good flexibility and biocompatibility, the flexible dielectric layer is prepared by soaking conductive solution in flexible multi-cavitation materials, the flexible dielectric layer has high dielectric constant and low elastic modulus, and meanwhile, the flexible insulating layer is used for isolating the upper electrode and the lower electrode, so that the parallel plate capacitor is prevented from being broken down to cause signal distortion when the muscle deformation signals are collected. When the flexible electrode with the structure is used for simultaneously acquiring muscle deformation and electromyographic signals, the flexible electrode can be well attached to the surface of skin, the generation of motion artifacts is reduced, and the interference between dual-mode signals is reduced, so that the acquisition of muscle multi-source information during the movement of a human body is realized.
Secondly, be used for bearing the bottom at the top of first electrode layer and have insulating base's collection circuit board, connect flexible electrode body and collection circuit board through this kind of mode and can reduce the length of leading out the wire, not only can reduce parasitic capacitance can also reduce motion artifact to guarantee the stability and the accuracy of human motion muscle signal acquisition.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The utility model provides a gather flexible electrode of bimodulus signal, this flexible electrode is used for gathering muscle deformation and electromyographic signal simultaneously, its characterized in that:
the flexible electrode comprises a first electrode layer, an insulating film, a flexible medium layer, a second electrode layer, a flexible insulating layer and a myoelectricity electrode layer, wherein the insulating film is respectively arranged on two opposite surfaces of the flexible medium layer, and the first electrode layer and the second electrode layer are respectively arranged on the surfaces, far away from the flexible medium layer, of the two insulating films; the flexible insulating layer is arranged on the surface of the second electrode layer away from the insulating film; the myoelectricity electrode layer is arranged on one side of the flexible insulating layer, which is far away from the second electrode layer.
2. The flexible electrode for collecting dual mode signals of claim 1, wherein: the flexible insulating layer is provided with a groove, and the groove is used for fixing the myoelectricity electrode layer.
3. The flexible electrode for collecting dual mode signals of claim 2, wherein: the number of the grooves and the number of the myoelectricity electrode layers are two, and the two grooves are respectively used for fixing the two myoelectricity electrode layers; the myoelectricity electrode layer is prepared by mixing a flexible substrate material and a conductive material.
4. A flexible electrode for acquiring a dual mode signal as claimed in any one of claims 1 to 3, wherein: the flexible medium layer is obtained by soaking the flexible porous foam material in a preset solution, filling the pores of the flexible porous foam material with the preset solution, and then drying at constant temperature.
5. The flexible electrode for collecting dual mode signals of claim 4, wherein: the porous flexible material is composed of a flexible porous material doped conductive material.
6. A flexible electrode for acquiring a dual mode signal as claimed in any one of claims 1 to 3, wherein: the flexible insulating layer has a modulus of elasticity greater than the modulus of elasticity of the myoelectric electrode layer.
7. The flexible electrode for collecting dual mode signals of claim 5, wherein: the thickness of the flexible insulating layer is 1-2mm, and the elastic modulus is more than 10MPa.
8. A method for preparing a flexible electrode for acquiring dual-mode signals according to any one of claims 1 to 7, wherein: the preparation method comprises the following steps:
(1) Soaking the flexible porous foam material in a preset solution, and then drying at constant temperature to obtain a flexible medium layer;
(2) Respectively preparing insulating films on two surfaces of the flexible medium layer, which are opposite to each other, and respectively attaching a first electrode layer and a second electrode layer on the two insulating films;
(3) Preparing a flexible insulating layer through a die, and pouring an Eclflex30 solution doped with conductive filler into a groove of the flexible insulating layer to obtain a myoelectric electrode layer;
(4) And arranging a flexible insulating layer on the second electrode layer to obtain the flexible electrode.
9. The method for preparing the flexible electrode for acquiring the dual-mode signal according to claim 1, wherein: further comprising the step of disposing a circuit board on a surface of the first electrode layer remote from the insulating film; the flexible porous foam material is polyurethane sponge, and the preset solution is copper calcium titanate solution or PEDOT: PSS aqueous solution; the mass ratio of the PDMS solution body to the catalyst is 10:1.
10. use of a flexible electrode as claimed in any one of claims 1-7 for acquiring a dual mode signal in a wearable device.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117717343A (en) * | 2024-02-07 | 2024-03-19 | 深圳市前海蛇口自贸区医院(深圳市南山区蛇口人民医院) | Flexible surface myoelectric device |
-
2023
- 2023-02-20 CN CN202310137474.XA patent/CN116172583A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117717343A (en) * | 2024-02-07 | 2024-03-19 | 深圳市前海蛇口自贸区医院(深圳市南山区蛇口人民医院) | Flexible surface myoelectric device |
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