Electrode framework based on flexible sensor and flexible sensor
By designing an electrode architecture with fixed rings and connecting rods spaced at array intervals, the problem of electrode offset when the flexible sensor is stretched and deformed on the human body surface was solved, thus improving the accuracy and reliability of bioelectric potential signal acquisition.
Patent Information
- Application Number
- CN202422991378.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-03
AI Technical Summary
When existing flexible sensors experience stretching deformation on the human body surface, the contact points between the electrodes and the human body surface are prone to shift, affecting the accuracy of monitoring.
An electrode architecture based on a flexible sensor is designed, which uses fixed rings and connecting rods arranged in an array at intervals. The electrode sheet is fixed in the fixed ring, and the connecting rod is offset from the center of the fixed ring, so that the fixed rings can be relatively displaced to maintain the stability of the contact point between the electrode sheet and the skin.
This effectively reduces the offset between the electrode pad and the skin contact point caused by skin stretching and deformation, improves the acquisition quality of bioelectric potential signals, and enhances the practical reliability of the flexible sensor.
Smart Images
Figure CN223667951U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to flexible sensor technical field, especially in based on flexible sensor's electrode architecture and flexible sensor. BACKGROUND
[0002] For non-invasive human body surface bioelectric potential signal monitoring, such as electrocardiogram signal, electromyogram signal, electroencephalogram signal, etc., the contact impedance stability between the monitoring electrode and the skin is the key to signal acquisition quality.
[0003] The electrode generally lacks the ability of stretching and deformation, and the biological matter of the human body surface is a flexible structure, and its fitting state with the electrode is easily affected by human body movement, therefore, most of the monitoring sensors for human body surface bioelectric potential signals commonly use electronic fabric or other flexible materials to manufacture electrodes to obtain flexible sensors or electronic skin, etc., so as to reduce the influence of human body movement on the fixed state between the electrode and the human body surface and reduce the random changes of the contact area and contact position of the electrode and the human body surface.
[0004] However, the existing flexible sensor has limited ability to change with the state change of the human body surface, especially when the human body surface appears stretching and deformation, the contact position of the electrode and the human body surface is easy to deviate, which affects the monitoring accuracy. SUMMARY
[0005] Therefore, the utility model provides a kind of electrode architecture and flexible sensor based on flexible sensor to solve the problem that the existing flexible sensor has limited ability to change with the state change of the human body surface, especially when the human body surface appears stretching and deformation, the contact position of the electrode and the human body surface is easy to deviate, which affects the monitoring accuracy.
[0006] The utility model provides a kind of electrode architecture based on flexible sensor, comprising: a plurality of fixed rings with array spacing, and connecting rod connected with the fixed ring, electrode sheet is fixedly arranged in the fixed ring, and the extension direction of the connecting rod is staggered with the center of the corresponding fixed ring.
[0007] Optionally, the connecting rod is arranged along the tangent direction of the corresponding fixed ring.
[0008] Optionally, the array structure of the fixed ring includes at least one of honeycomb array, closest packing array and square array.
[0009] Optionally, the electrode sheet is an ellipsoid or a cylinder.
[0010] Optionally, the thickness of the electrode sheet is greater than or equal to the thickness of the fixed ring.
[0011] Optionally, the electrode sheet is a cylinder, the thickness of the electrode sheet is greater than the thickness of the fixed ring, and the fixed ring is embedded in the side wall of the electrode sheet.
[0012] Optionally, the material of the fixed ring and the connecting rod comprises any one of silica gel, acrylic, and graphene.
[0013] Optionally, the electrode sheet is any one of silver chloride, brass, and platinum gold.
[0014] The utility model also provides a flexible sensor, including substrate, and above based on flexible sensor's electrode architecture, electrode architecture is fixed in the skin adhesion side of substrate.
[0015] Optionally, the adhesive material of the skin adhesion side of the substrate comprises any one of hydrolyzed protein and chitosan.
[0016] The electrode architecture based on the flexible sensor provided by the utility model comprises: a plurality of fixed rings arranged at intervals in an array, and a connecting rod connecting the fixed rings, an electrode sheet is fixedly arranged in the fixed ring, and the connecting rod is arranged offset from the center of the fixed ring, so that when the electrode architecture is affected by external force, the stress direction of the fixed ring is offset from the center of the fixed ring by the action of the connecting rod, the fixed rings can be relatively displaced and simultaneously rotate, the relative stationary state of the contact points of the electrode sheet fixed in the fixed ring and the skin is maintained, and the acquisition quality of the bioelectric potential signal is maintained. The electrode architecture based on the flexible sensor provided by the utility model can effectively reduce the problem that the stretching deformation of the skin easily causes the contact points of the electrode sheet and the skin to deviate, improve the acquisition quality of the bioelectric potential signal, and further improve the practical reliability of the flexible sensor. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a basic unit structure schematic view of the electrode architecture based on the flexible sensor in the utility model embodiment;
[0018] Figure 2 It is a first array structure schematic view of the electrode architecture based on the flexible sensor in the utility model embodiment;
[0019] Figure 3 It is a second array structure schematic view of the electrode architecture based on the flexible sensor in the utility model embodiment;
[0020] Figure 4 It is a third array structure schematic view of the electrode architecture based on the flexible sensor in the utility model embodiment;
[0021] Figure 5 It is a first cross-section structure schematic view of the electrode architecture based on the flexible sensor in the utility model embodiment;
[0022] Figure 6 Figure 2 is a second cross-sectional structure schematic diagram of the electrode architecture based on the flexible sensor in the embodiments of the present application;
[0023] Figure 7 Figure 3 is a third cross-sectional structure schematic diagram of the electrode architecture based on the flexible sensor in the embodiments of the present application.
[0024] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION
[0025] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The drawings show several embodiments of the present application. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.
[0026] It should be noted that when an element is referred to as being "fixedly attached" to another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. As used herein the terms "vertical", "horizontal", "left", "right", and the like are merely for purposes of illustration.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0028] To solve the problem that the existing flexible sensor has limited ability to follow the state change of the human body surface, especially when the human body surface appears to be stretched, the contact position between the electrode and the human body surface is easy to deviate, affecting the monitoring accuracy. The present application provides an electrode architecture based on a flexible sensor, which fixes the electrode sheet in a fixed ring, the fixed rings are arranged at intervals, the fixed rings are connected by connecting rods, and the extension direction of the connecting rod deviates from the center of the fixed ring, so that the fixed rings can be relatively displaced, the fixed rings can follow the movement of the object to be attached, and the relative stationary state of the contact point between the fixed electrode sheet in the fixed ring and the skin is maintained, the collection quality of the bioelectric potential signal is maintained, and the practical reliability of the flexible sensor is improved.
[0029] Specifically, please refer to Figure 1The basic unit of the electrode structure based on the flexible sensor comprises a fixed ring 11, a connecting rod 12 and an electrode sheet 13, the electrode sheet 13 is fixed in the fixed ring 11, the connecting rod 12 is fixed on the fixed ring 11, is mainly used for connecting between the basic units, and the extension direction of the connecting rod 12 deviates from the center of the fixed ring 11, when the stretching force is received, the fixed ring 12 is preferentially driven to rotate by the transmission of the connecting rod 12, the force deviates from the center of the fixed ring 12, and the rotation of the fixed ring 12 is avoided.
[0030] In the embodiment, the fixed ring 11 is connected with three connecting rods 12, and a corresponding array structure is a honeycomb array, as shown in the figure. Figure 2 When the electrode structure is attached to the skin, if the skin surface appears stretching deformation, the electrode sheet 13 can be displaced along with the skin, the contact position with the skin is kept relatively static, the sliding of the electrode sheet 13 on the skin surface is avoided, the biological potential signal collected can be prevented from mutation, the collection quality of the biological potential signal is ensured, and the practical reliability of the flexible sensor is improved.
[0031] In order to ensure the stretching ability of the electrode structure, in the embodiment, the extension direction of the connecting rod 12 is consistent with the tangent direction of the fixed ring 11, the extension line of the connecting rod 12 can be maximized to deviate from the center of the fixed ring 11, and the relative displacement ability between the electrode sheets is maximized.
[0032] According to the specific type of the array structure, the number of the connecting rods 12 connected with the fixed ring 11 can be adaptively adjusted, for example, as shown in the figure. Figure 3 A single fixed ring is flexibly connected with four adjacent fixed rings through four connecting rods, and as shown in the figure. Figure 4 A single fixed ring is flexibly connected with six adjacent fixed rings through six connecting rods.
[0033] The specific array structure can be selected according to the stretching rate requirement of the electrode sheet, and can also be a pentagonal array and other array structures; the length of the connecting rod specifically affects the density of the electrode sheet, and the actual length can be selected according to the density requirement of the electrode sheet; the deviation degree of the extension line of the connecting rod from the center of the fixed ring also affects the array structure of the electrode sheet and the density of the electrode sheet. That is, the specific length and deviation degree of the connecting rod can be flexibly selected according to the density of the electrode sheet and the stretching rate requirement of the electrode structure.
[0034] According to different requirements of the electrode, the structure of the electrode sheet 13 can be various, for example, a cylinder, a square as shown in the figures. Figure 5 Figure 6 Or an ellipse, an ellipse as shown in the figure. Figure 7
[0035] According to the different collected data and test objects, the thickness of the electrode sheet can be different, and correspondingly, the thickness of the electrode sheet 13 is greater than or equal to the thickness of the fixed ring 11, so as to ensure that the electrode sheet 13 can be completely attached to the surface of the test object, the stability of the contact area is ensured, and then the stability and reliability of the collected bioelectric potential signal are ensured.
[0036] When the electrode sheet 13 is a cylinder and the thickness of the electrode sheet 13 is greater than the thickness of the fixed ring 11, as shown in the figure, Figure 5 The fixed ring 11 can be embedded in the side wall of the electrode sheet 13, which can improve the fixing and limiting reliability of the fixed ring 11 on the electrode sheet 13.
[0037] When the electrode sheet 13 is an ellipsoid, the shape of the fixed ring 11 can be complementary to the edge structure of the ellipsoid, as shown in the figure, Figure 7 The limiting and fixing of the ellipsoid electrode sheet can be conveniently realized.
[0038] In order to realize the flexible characteristics of the electrode architecture, the connection between the fixed ring 11 and the connecting rod 12 is required to be flexible, and correspondingly, the materials of the fixed ring 11 and the connecting rod 12 can be selected to be materials with insulation and large tensile ratio, such as silica gel, acrylic, graphene and the like.
[0039] The flexible sensor of the utility model is mainly used for the detection of bioelectric potential signal, and correspondingly, the electrode sheet in the electrode architecture needs to be in contact with biological tissues. In order to avoid the occurrence of allergic reaction of the organism, the electrode sheet should select low-sensitization material, for example, silver chloride, brass, platinum and the like.
[0040] The utility model also provides a flexible sensor including a substrate and the electrode architecture based on the flexible sensor, and the electrode architecture is fixed on the skin-adhesive side of the substrate, so as to be adhered to the surface of the detection object through the substrate.
[0041] In order to avoid that the adhesive material in the substrate causes allergy, in the embodiment, the adhesive material on the skin-adhesive side of the substrate is low-sensitization material, for example, hydrolyzed protein, chitosan and the like.
[0042] The electrode architecture based on the flexible sensor and the flexible sensor provided by the utility model are provided with a plurality of fixed rings arranged at intervals in an array and a connecting rod connecting the fixed rings, the electrode sheet is fixed in the fixed ring, and the connecting rod is arranged offset from the center of the fixed ring, so that when the electrode architecture is affected by external force, the fixed rings can be relatively displaced through the action of the connecting rod, the fixed electrode sheet in the fixed ring can stretch along with the stretching of the skin, the relative static state of the contact point with the skin is maintained, the collection quality of the bioelectric potential signal is maintained, and the practical reliability of the flexible sensor can be effectively improved.
[0043] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0044] The above-described embodiments only express several specific implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.
Claims
1. A flexible sensor-based electrode architecture, characterized by, The electrode frame comprises: a plurality of fixed rings arranged in an array, and a connecting rod connecting the fixed rings, wherein an electrode sheet is fixedly arranged in the fixed rings, and the extending direction of the connecting rod is offset from the center of the corresponding fixed ring.
2. The electrode architecture of claim 1, wherein, The connecting rod is arranged in the tangential direction of the corresponding fixed ring.
3. The flexible sensor-based electrode architecture of claim 1, wherein, The array structure of the fixed ring comprises at least one of a honeycomb array, a closest packing array, and a square array.
4. The flexible sensor-based electrode architecture of claim 1, wherein, The electrode sheet is an ellipsoid or a cylinder.
5. The flexible sensor-based electrode architecture of claim 1 or 4, wherein, The thickness of the electrode sheet is greater than or equal to the thickness of the fixed ring.
6. The flexible sensor-based electrode architecture of claim 1, wherein, The electrode sheet is a cylinder, the thickness of the electrode sheet is greater than the thickness of the fixed ring, and the fixed ring is embedded in the side wall of the electrode sheet.
7. The flexible sensor-based electrode architecture of claim 1, wherein, The material of the fixed ring and the connecting rod comprises any one of silica gel, acrylic, and graphene.
8. The flexible sensor-based electrode architecture of claim 1, wherein, The electrode sheet is any one of silver chloride, brass, and platinum gold.
9. A flexible sensor, characterized by The electrode frame is fixed to the skin-adhesive side of the substrate.
10. The flexible sensor of claim 9, wherein, The adhesive material of the skin-adhesive side of the substrate comprises any one of hydrolyzed protein and chitosan.