CN217845456U - Flexible pressure sensor and wearable equipment - Google Patents
Flexible pressure sensor and wearable equipment Download PDFInfo
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- CN217845456U CN217845456U CN202222008120.9U CN202222008120U CN217845456U CN 217845456 U CN217845456 U CN 217845456U CN 202222008120 U CN202222008120 U CN 202222008120U CN 217845456 U CN217845456 U CN 217845456U
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Abstract
The application discloses flexible pressure sensor and wearable equipment. The flexible pressure sensor includes: a flexible fabric; an electrode layer disposed on the flexible fabric; and the elastic layer comprises a pressure-sensitive layer and a supporting layer, the supporting layer is fixed on the flexible fabric, the pressure-sensitive layer is in conductive connection with the electrode layer, a resistance value change signal of the pressure-sensitive layer is transmitted through the electrode layer, and the supporting layer limits the pressure-sensitive layer on the electrode layer. The application discloses flexible pressure sensor regards as the substrate of electrode layer with flexible fabric, has soft comfortable characteristics, and is good with user's skin laminating degree when using, can not produce the foreign matter and feel. In addition, the flexible fabric has good deformability, and can accurately transfer pressure to the pressure-sensitive layer. Thereby, the comfort of the wearable device and the accuracy of data acquisition can be improved after the wearable device is implanted.
Description
Technical Field
The application relates to the technical field of wearable equipment, in particular to a flexible pressure sensor and wearable equipment.
Background
With the development of precision sensing technology and the need of human health monitoring, pressure sensing intelligent wearable devices with high sensitivity and related technologies thereof attract great attention. Among the various methods of improving sensitivity, it is important to design the microstructure of the sensor. Conventional thin film resistive sensors are limited to relatively weak mechanical deformations and are difficult to accurately collect and detect small pressure changes. Meanwhile, the substrate material of the traditional film resistance sensor is mostly PI, PET and other materials with low flexibility, so that the adhesion with the skin is difficult to keep high, and after the intelligent eye patch is implanted, a user wears the intelligent eye patch to generate foreign body sensation. Conventional thin film resistive sensors collect inaccurate data because the substrate material is difficult to maintain a high degree of conformity with the skin. The electrode layer arranged on the substrate materials such as PI, PET and the like is easy to open after being bent for multiple times, and in addition, when the sensing layer is contacted with the electrode layer, insufficient contact between two layers is easy to generate, so that the sensing is not sensitive or the signal transmission reaction is delayed, and the production and manufacturing yield is low.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned defect or not enough of prior art, the utility model provides a flexible pressure sensor, with the high laminating of skin, collect accurately and detect less pressure variation.
To the above-mentioned defect or not enough of prior art, the utility model also provides a wearable equipment, the user wears comfortablely, collects accurately and detects less pressure variation.
In order to achieve the above object, a first aspect of the present application provides a flexible pressure sensor comprising:
a flexible fabric;
an electrode layer disposed on the flexible fabric; and
the elastic layer comprises a pressure sensing layer and a supporting layer, the supporting layer is fixed on the flexible fabric, the pressure sensing layer is in conductive connection with the electrode layer, resistance value change signals of the pressure sensing layer are transmitted through the electrode layer, and the supporting layer limits the pressure sensing layer on the electrode layer.
In an embodiment of the application, the pressure-sensitive layer comprises a pressure-sensitive material and the support layer comprises an elastic material.
In an embodiment of the present application, the pressure-sensitive material includes at least one of pressure-sensitive ink, conductive sponge, and conductive silicone.
In the embodiment of the present application, the initial resistance value of the pressure-sensitive layer is greater than or equal to 100k Ω.
In the embodiment of the present application, the elastic material is silicone or sponge.
In the embodiment of the application, the supporting layer is provided with an accommodating cavity for accommodating the pressure-sensitive layer; alternatively, the support layer and the pressure-sensitive layer are of unitary construction.
In the present embodiment, the support layer is secured to the flexible fabric by an adhesive layer.
In an embodiment of the present application, the electrode layer includes a plurality of electrode structures and conductive wires, the electrode structures are electrically connected to the pressure-sensitive layer, and the conductive wires are electrically connected to the electrode structures.
In the embodiment of the application, the electrode structure is an array type interdigital electrode structure or an upper and lower electrode structure. In the embodiment of the application, the array type interdigital electrode structure has a front surface and a back surface opposite to the front surface, the pressure sensing layer is arranged on the front surface of the interdigital electrode structure, and the flexible fabric is attached to the back surface of the interdigital electrode structure.
In an embodiment of the application, the array-type upper and lower electrode structure includes a first electrode and a second electrode, the flexible fabric includes a first flexible fabric and a second flexible fabric, the pressure sensing layer has a front surface and a back surface opposite to the front surface, the first electrode is disposed between the first flexible fabric and the front surface of the pressure sensing layer, and the second electrode is disposed between the second flexible fabric and the back surface of the pressure sensing layer.
In the embodiment of the present application, the conductive wire is coated with insulating oil.
In the embodiment of the present application, the thickness of the pressure-sensitive layer and the support layer is the same.
In the embodiment of the present application, the thickness of the support layer is greater than the thickness of the pressure-sensitive layer.
In the embodiment of the present application, the thickness of the pressure-sensitive layer is greater than that of the support layer.
A second aspect of the application provides a wearable device comprising the above-described flexible pressure sensor.
Through the technical scheme, the flexible pressure sensor comprises a flexible fabric; an electrode layer disposed on the flexible fabric; and the elastic layer comprises a pressure-sensitive layer and a supporting layer, the supporting layer is fixed on the flexible fabric, the pressure-sensitive layer is in conductive connection with the electrode layer, a resistance value change signal of the pressure-sensitive layer is transmitted through the electrode layer, and the supporting layer limits the pressure-sensitive layer on the electrode layer. The application discloses flexible pressure sensor regards as the substrate of electrode layer with flexible fabric, has soft comfortable characteristics, and is good with user's skin laminating degree when using, can not produce the foreign matter and feel. In addition, the flexible fabric has good deformability, and can accurately transfer pressure to the pressure-sensitive layer. Thereby the comfort of the wearable device and the accuracy of data acquisition can be improved after the wearable device is implanted.
Additional features and advantages of embodiments of the present application will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the embodiments of the disclosure, but are not intended to limit the embodiments of the disclosure. In the drawings:
FIG. 1 schematically illustrates a block diagram of a flexible pressure sensor according to an embodiment of the present application;
FIG. 2 schematically illustrates a block diagram of a flexible pressure sensor according to another embodiment of the present application;
FIG. 3 schematically illustrates a construction of an elastic layer according to an embodiment of the present application;
FIG. 4 schematically illustrates a construction of an elastic layer according to another embodiment of the present application;
FIG. 5 schematically illustrates a structural diagram of an electrode layer according to an embodiment of the present application;
FIG. 6 schematically illustrates a structure of an electrode layer according to another embodiment of the present application;
FIG. 7 schematically illustrates a structure of an electrode layer printed on a flexible fabric according to an embodiment of the present application;
FIG. 8 schematically shows a structure of a first electrode layer printed on a flexible fabric according to another embodiment of the present application;
fig. 9 schematically shows a structure view of a second electrode layer printed on a flexible fabric according to another embodiment of the present application.
Description of the reference numerals
101. Flexible fabric 102 electrode layer
104. Pressure sensitive layer 105 support layer
106. Adhesive layer 601 first electrode
602. Second electrode 801 first flexible textile
901. Second flexible fabric
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of 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 should be understood that the specific embodiments described herein are only used for illustrating and explaining the embodiments of the present application and are not used for limiting the embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that if directional indications (such as up, down, left, right, front, back, 8230; \8230;) are referred to in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope claimed in the present application.
Fig. 1 schematically illustrates a block diagram of a flexible pressure sensor according to an embodiment of the present application, and fig. 2 schematically illustrates a block diagram of a flexible pressure sensor according to another embodiment of the present application. As shown in fig. 1 and 2, in an embodiment of the present application, there is provided a flexible pressure sensor, which may include: a flexible textile 101, an electrode layer 102 and an elastic layer. The electrode layer 102 is arranged on the flexible fabric 101, the elastic layer may include a pressure-sensitive layer 104 and a support layer 105, the pressure-sensitive layer 104 is made of a pressure-sensitive material, the support layer 105 is made of an elastic material, the pressure-sensitive layer 104 is electrically connected with the electrode layer 102, a resistance value change signal of the pressure-sensitive layer 104 is transmitted through the electrode layer, the support layer 105 limits the pressure-sensitive layer 104 on the electrode layer 102, and the support layer 105 is fixed on the flexible fabric 101 through an adhesive layer 106. The accuracy of data acquisition is improved by the flexible pressure sensor formed by the flexible fabric 101, the electrode layer 102 and the elastic layer.
The elastic layer is used to provide a varying resistance. When pressure is applied to the flexible pressure sensor, the structure is squeezed and the resistance of the structure is changed, so that the pressure signal is converted into an electric signal. Fig. 3 is a structural view schematically showing an elastic layer according to an embodiment of the present application, and fig. 4 is a structural view schematically showing an elastic layer according to another embodiment of the present application. As shown in fig. 3 and 4, in the present embodiment, the elastic layer may include a pressure-sensitive layer 104 and a support layer 105. The pressure sensitive layer 104 is composed of a pressure sensitive material, wherein the pressure sensitive material may include, but is not limited to, pressure sensitive ink, conductive sponge, and conductive silicone. The pressure sensitive layer 104 is electrically connected to the electrode layer 102, a resistance value change signal of the pressure sensitive layer 104 is transmitted through the electrode layer 102, and an initial resistance value of the pressure sensitive layer 104 is equal to or greater than 100k Ω. Preferably, the initial resistance value of the pressure-sensitive layer 104 is 1M Ω or more. More preferably, the initial resistance value of the pressure-sensitive layer 104 is 1 to 10M Ω. If the initial resistance of the pressure-sensitive layer 104 is too small, the conductivity of the pressure-sensitive layer 104 is too good, which affects the sensitivity and the measuring range of the flexible pressure sensor; if the initial resistance of the pressure-sensitive layer 104 is too large, the conductivity of the pressure-sensitive layer 104 decreases, so that the resistance value of the pressure-sensitive layer 104 does not change significantly when a force is applied. The support layer 105 is fixed on the flexible fabric 101 by an adhesive layer, and the material of the adhesive layer may be double-sided tape, glue or hot-melt adhesive film. The supporting layer 105 is provided with an accommodating cavity for accommodating the pressure-sensitive layer 104, and is used for accommodating the pressure-sensitive layer 104.
The electrode layer is used for identifying the resistor and acquiring pressure data of human skin so as to output a pressure signal. In the application scenario of the intelligent wearable device, due to the requirement of detecting the subtle changes of the surface pressure of a certain area of the skin of a human body, the synergistic effect of a plurality of electrode structures is required to sense the force-electric signal, so that the higher sensitivity is achieved. The electrode structure can be an array interdigital electrode structure or an upper electrode structure and a lower electrode structure. Fig. 5 is a view schematically showing the structure of an electrode layer according to an embodiment of the present application, and fig. 6 is a view schematically showing the structure of an electrode layer according to another embodiment of the present application. As shown in fig. 5 and 6, in the embodiment of the present application, the electrode layer 102 is composed of a plurality of electrode structures and conductive wires, the electrode structures are electrically connected to the pressure-sensitive layer 104, and the conductive wires are electrically connected to the electrode structures. In one example, the electrode structure may be an array interdigital electrode structure or an array up-down electrode structure. The array interdigital electrode structure is provided with a front surface and a back surface opposite to the front surface, the pressure sensing layer is arranged on the front surface of the interdigital electrode structure, and the flexible fabric is attached to the back surface of the interdigital electrode structure. The array interdigital electrode structure has simple structure and good reliability; the arrayed top and bottom electrode structure may include a first electrode 601 and a second electrode 602, and the arrayed top and bottom electrode structure is more sensitive in certain situations. The electrode layer is positioned corresponding to the sensing portion of the elastic layer to recognize the resistance of the elastic layer, thereby outputting a pressure signal.
Fig. 7 schematically shows a structure view of an electrode layer printed on a flexible fabric according to an embodiment of the present application. Fig. 8 schematically shows a structure of a first electrode layer printed on a flexible fabric according to another embodiment of the present application; fig. 9 schematically shows a structure of a second electrode layer printed on a flexible fabric according to another embodiment of the present application. As shown in fig. 7, 8 and 9, the array-type interdigital electrode structure has a front surface and a back surface opposite to the front surface, the pressure sensing layer is disposed on the front surface of the interdigital electrode structure, and the flexible fabric is attached to the back surface of the interdigital electrode structure. The upper and lower electrode structure may include a first electrode 601 and a second electrode 602, the flexible fabric may include a first flexible fabric 801 and a second flexible fabric 901, the pressure sensitive layer has a front surface and a back surface opposite to the front surface, the first electrode 601 is disposed between the first flexible fabric 603 and the front surface of the pressure sensitive layer 104, and the second electrode 602 is disposed between the second flexible fabric 604 and the back surface of the pressure sensitive layer 104. The electrode layer is made of metal conductive slurry, such as conductive materials like silver slurry, copper slurry, platinum slurry and gold slurry; the metal conductive paste is printed on the flexible fabric by means of screen printing, ink-jet printing, 3D printing, dot coating and the like to form the electrode layer.
In the present embodiment, the substrate material is selected to be a flexible fabric. Most of the traditional thin film flexible pressure sensors use materials such as PI and PET as substrates, and the low flexibility causes foreign body sensation when the sensors are worn after being implanted into an eye mask. Meanwhile, the high fit with the skin of a human body is difficult to maintain, and collected related data are inaccurate. In the embodiment of the present application, the flexible fabric is used as a substrate of the electrode layer, and is directly contacted with the skin of the user, and the flexible fabric needs to have the characteristics of skin friendliness and softness. The material of the flexible fabric is natural or artificial cotton, silk and other materials. This application adopts flexible fabric as the substrate of electrode layer, has guaranteed the pliability of sensor, can guarantee to wear the travelling comfort behind the implantation intelligent eye-shade to and more effective laminating skin. In addition, the mechanical deformation of the flexible fabric is good, so that the accuracy of pressure sensing data can be improved.
Through the technical scheme, the flexible pressure sensor comprises a flexible fabric; an electrode layer disposed on the flexible fabric; and the elastic layer comprises a pressure-sensitive layer and a supporting layer, the supporting layer is fixed on the flexible fabric, the pressure-sensitive layer is in conductive connection with the electrode layer, a resistance value change signal of the pressure-sensitive layer is transmitted through the electrode layer, and the supporting layer limits the pressure-sensitive layer on the electrode layer. The application discloses flexible pressure sensor regards as the substrate of electrode layer with flexible fabric, has soft comfortable characteristics, and is good with user's skin laminating degree when using, can not produce the foreign matter and feel. In addition, the flexible fabric has good deformability, and can accurately transfer low pressure to the pressure-sensitive layer. Thereby the comfort of the wearable device and the accuracy of data acquisition can be improved after the wearable device is implanted.
In an embodiment of the present application, the pressure-sensitive material may include at least one of pressure-sensitive ink, conductive sponge, or conductive silicone.
In particular, the pressure sensitive material is a pressure sensitive material capable of collecting and detecting minute pressure changes. In the conventional thin film flexible pressure sensor, the deformation range can be only a plurality of microns. Sensitivity is insufficient in many scenarios. The flexible pressure sensor in this application is through adopting pressure-sensitive materials such as pressure-sensitive printing ink, electrically conductive sponge or electrically conductive silica gel to feel the layer as pressure, has saved complicated preparation step, and flexible pressure sensor's production technology is simpler, and the yields is higher, has reduced the cost of product. The change that can inspect tiny pressure has been guaranteed to guarantee to wear travelling comfort and data accuracy with the laminating degree of skin when equipment is worn with promotion sensitivity, higher pliability improvement.
In the embodiment of the present application, the initial resistance value of the pressure-sensitive layer is greater than or equal to 100k Ω.
In particular, the initial resistance of the pressure sensitive layer affects the sensitivity and conductivity properties of the flexible pressure sensor. If the initial resistance of the pressure-sensitive layer is too small, the conductivity of the pressure-sensitive layer is too good, and the sensitivity and the measuring range of the flexible pressure sensor are affected. If the initial resistance of the pressure-sensitive layer is too large, the conductivity of the pressure-sensitive layer is reduced, so that the resistance value of the pressure-sensitive layer cannot be changed obviously when the pressure-sensitive layer is stressed. In one example, the initial resistance value of the pressure sensitive layer is equal to or greater than 100k Ω. Preferably, the initial resistance value of the pressure-sensitive layer is 1M Ω or more. More preferably, the initial resistance value of the pressure-sensitive layer is 1 to 10 M.OMEGA.. The flexible pressure sensor in this application, through the injecing to the layer resistance that feels to the pressure, improve the electric conductive property on layer and flexible pressure sensor's sensitivity is felt to the pressure.
In the embodiment of the present application, the elastic material is silica gel or sponge, wherein the silica gel is conductive silica gel or non-conductive silica gel, and the sponge is conductive sponge or non-conductive sponge.
Specifically, the supporting layer is made of an elastic material, and the elastic material may be silica gel or sponge, wherein the silica gel is conductive silica gel or non-conductive silica gel, and the sponge is conductive sponge or non-conductive sponge. The supporting layer is provided with an accommodating cavity for accommodating the pressure-sensitive layer and used for limiting the pressure-sensitive layer on the electrode layer; alternatively, the support layer and the pressure-sensitive layer are of unitary construction. At the same time, the supporting layer is fixed on the flexible fabric. In one example, the support layer is secured to the flexible fabric by an adhesive layer, which may be double-sided tape, glue, or a hot-melt adhesive film.
In an embodiment of the present application, the electrode layer may include a plurality of electrode structures and a conductive wire, the electrode structures being conductively connected to the pressure-sensitive layer, and the conductive wire being conductively connected to the electrode structures.
Particularly, in the application scenario of the smart wearable device, due to the requirement of detecting the subtle changes of the surface pressure of a certain area of the human skin, the force-electric signal sensing is required to be performed by the cooperation of a plurality of electrode structures, so as to achieve higher sensitivity. Therefore, the electrode layer of the embodiments of the present application may include a plurality of electrode structures. In one example, the electrode structure may be an array interdigital electrode structure or an array up-down electrode structure. The array interdigital electrode structure has simple structure and good reliability; the array type upper and lower electrode structure has higher sensitivity under specific conditions. The electrode structure is positioned to correspond to the sensing portion of the elastic layer to identify the resistance of the elastic layer, thereby outputting a pressure signal. The conductive wire is in conductive connection with the electrode structure, wherein the conductive wire is coated with insulating oil, and the insulating oil forms an insulating oil layer on the conductive wire and is used for protecting the conductive wire so as to prevent the conductive wire from being broken and short-circuited.
In the embodiment of the present application, the array electrode structure may be an array interdigital electrode structure or an array upper and lower electrode structure.
As shown in fig. 5, interdigitated electrodes refer to electrodes having a periodic pattern in their faces, such as fingers or combs, that are used to create a capacitance associated with an electric field that can penetrate a sample of material and a sensitive coating. The electrode structure in the embodiment of the application can be an array interdigital electrode structure, the pressure sensing layer is arranged on the front surface of the array interdigital electrode structure, and the flexible fabric is attached to the back surface of the array interdigital electrode structure. In one example, the structure of the flexible pressure sensor can be a structure consisting of a flexible fabric, an array type interdigital electrode structure and a pressure sensing layer, wherein the flexible fabric is attached to the back surface of the array type interdigital electrode structure, and the pressure sensing layer is arranged on the front surface of the array type interdigital electrode structure; or the flexible fabric is arranged on the front side of the array interdigital electrode structure, and the pressure sensing layer is attached to the back side of the array interdigital electrode structure. The array interdigital electrode structure has simple structure and high reliability.
As shown in fig. 6, the arrayed upper and lower electrode structure may include a first electrode 601 and a second electrode 602. The flexible pressure sensor of the embodiment of the present application may include two flexible fabric substrates (i.e., a first flexible fabric 801 and a second flexible fabric 901), a first electrode 601 and a second electrode 602, and a pressure sensing layer. The pressure sensitive layer has a front side and a back side opposite to the front side, the first electrode 601 is arranged between the first flexible textile 801 and the front side of the pressure sensitive layer 104, and the second electrode 602 is arranged between the second flexible textile 901 and the back side of the pressure sensitive layer 104. In one example, the arrayed upper and lower electrode structure may be a structure composed of a first flexible fabric 801, a first electrode 601, a pressure sensing layer 104, a second electrode 602, and a second flexible fabric 901. The array type upper and lower electrode structure has higher sensitivity under specific conditions.
In the embodiment of the present application, the thickness of the pressure-sensitive layer and the supporting layer is the same.
The elastic layer can comprise a pressure-sensitive layer and a supporting layer, wherein the pressure-sensitive layer is made of a pressure-sensitive material, and the supporting layer is made of an elastic material; alternatively, the support layer and the pressure-sensitive layer are of unitary construction. Simultaneously, the supporting layer is offered and is used for holding the chamber that holds on pressure layer for hold the pressure layer. In case of a large area pressure measurement, the thickness of the pressure-sensitive layer and the supporting layer may be the same. In one example, the supporting layer and the pressure-sensitive layer have the same thickness, and under the condition that the thicknesses of the supporting layer and the pressure-sensitive layer are the same, the uniformity of stress can be kept, and the pressure-sensitive sensor is suitable for being applied to large-area pressure measurement.
In the embodiment of the present application, the thickness of the support layer is greater than the thickness of the pressure-sensitive layer.
Under the condition that the pressure-sensitive layer needs to be elastically deformed for a long time, the thickness of the supporting layer can be larger than that of the pressure-sensitive layer. Because the supporting layer is used for accommodating the pressure-sensitive layer, when the thickness of the supporting layer is larger than that of the pressure-sensitive layer, the supporting range of the supporting layer is larger, and the elastic deformation of the pressure-sensitive layer can be kept in an optimal range for a long time.
In the embodiment of the present application, the thickness of the pressure-sensitive layer is greater than that of the support layer.
In the case where it is desired to improve the sensitivity of the flexible pressure sensor, the thickness of the pressure-sensitive layer may be made larger than the thickness of the support layer. Because the pressure-sensitive layer is used for providing variable resistance, when the thickness of the pressure-sensitive layer is greater than that of the support layer, the sensitivity of the change of the resistance value of the pressure-sensitive layer can be maintained, so that the sensitivity of the flexible pressure sensor is improved. In addition, the initial resistance of the pressure-sensitive layer also affects the sensitivity of the flexible pressure sensor, and if the initial resistance of the pressure-sensitive layer is too small, the conductivity of the pressure-sensitive layer is too good, which affects the sensitivity and the measuring range of the flexible pressure sensor. Thus, different thicknesses of the support layer and the pressure-sensitive layer can be selected in case of different requirements.
Through the technical scheme, the flexible pressure sensor comprises a flexible fabric; an electrode layer disposed on the flexible fabric; and the elastic layer comprises a pressure-sensitive layer and a supporting layer, the supporting layer is fixed on the flexible fabric, the pressure-sensitive layer is in conductive connection with the electrode layer, a resistance value change signal of the pressure-sensitive layer is transmitted through the electrode layer, and the supporting layer limits the pressure-sensitive layer on the electrode layer. The application discloses flexible pressure sensor uses flexible fabric as the substrate of electrode layer, has soft comfortable characteristics, and is good with user's skin laminating degree when using, can not produce the foreign matter and feel. In addition, the flexible fabric has good deformability, and can accurately transfer low pressure to the pressure-sensitive layer. Thereby the comfort of the wearable device and the accuracy of data acquisition can be improved after the wearable device is implanted.
The embodiment of the application provides a wearable device, can include:
the flexible pressure sensor for a wearable device described above.
In particular, wearable devices may include, but are not limited to, smart eyewear, smart bracelets, smart neck massagers, smart sitting position correctors, and the like.
In an embodiment of the present application, a process for manufacturing a flexible pressure sensor may include:
1. silver electrodes were printed on the flexible fabric in a specific pattern. In one example, when the array electrode structure is an array interdigital electrode structure, the array interdigital electrode structure will be silk-screened on the first side of the flexible fabric. When the array electrode structure is an array upper and lower electrode structure, the upper and lower electrodes of the array upper and lower electrode structure are respectively silk-screened on the upper and lower flexible fabrics.
2. And printing an insulating oil layer on the electrode circuit needing to be protected by the electrode layer for protecting the silver electrode circuit, wherein the sensing part corresponding to the electrode is exposed.
3. And carrying out laser cutting on the flexible fabric printed with the silver electrode and the insulating oil layer to obtain the peripheral outline of the flexible pressure sensor.
4. And carrying out laser cutting on the pressure-sensitive layer according to a specific pattern, wherein the pattern is the same as the cutting shape of the flexible fabric.
5. And (3) bonding and fixing the pressure sensing layer and the flexible fabric printed with the electrodes through double-sided adhesive tapes surrounding the periphery of the electrodes to complete the assembly of the whole flexible pressure sensor. When the array type electrode structure is an array type interdigital electrode structure, the pressure sensing layer is adhered to the flexible fabric; when the array electrode structure is an array upper electrode structure and an array lower electrode structure, the pressure sensing layer is adhered between the array upper electrode structure and the array lower electrode structure.
Through the technical scheme, the flexible pressure sensor comprises a flexible fabric; an electrode layer disposed on the flexible fabric; and the elastic layer comprises a pressure-sensitive layer and a supporting layer, the supporting layer is fixed on the flexible fabric, the pressure-sensitive layer is in conductive connection with the electrode layer, a resistance value change signal of the pressure-sensitive layer is transmitted through the electrode layer, and the supporting layer limits the pressure-sensitive layer on the electrode layer. The application discloses flexible pressure sensor uses flexible fabric as the substrate of electrode layer, has soft comfortable characteristics, and is good with user's skin laminating degree when using, can not produce the foreign matter and feel. In addition, the flexible fabric has good deformability, and can accurately transfer low pressure to the pressure-sensitive layer. Thereby the comfort of the wearable device and the accuracy of data acquisition can be improved after the wearable device is implanted.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims (16)
1. A flexible pressure sensor, comprising:
a flexible fabric;
an electrode layer disposed on the flexible fabric; and
the elastic layer comprises a pressure sensing layer and a supporting layer, the supporting layer is fixed on the flexible fabric, the pressure sensing layer is in conductive connection with the electrode layer, resistance value change signals of the pressure sensing layer are transmitted through the electrode layer, and the supporting layer limits the pressure sensing layer on the electrode layer.
2. The flexible pressure sensor of claim 1, wherein the pressure sensitive layer comprises a pressure sensitive material and the support layer comprises an elastomeric material.
3. The flexible pressure sensor of claim 2, wherein the pressure sensitive material comprises at least one of a pressure sensitive ink, a conductive sponge, and a conductive silicone.
4. The flexible pressure sensor of claim 2, wherein the pressure sensitive layer has an initial resistance value greater than or equal to 100k Ω.
5. The flexible pressure sensor of claim 2 wherein the resilient material is silicone or sponge.
6. The flexible pressure sensor according to claim 1, wherein the supporting layer is provided with a receiving cavity for receiving the pressure sensing layer; or the supporting layer and the pressure-sensitive layer are of an integral structure.
7. The flexible pressure sensor of claim 1, wherein the support layer is secured to the flexible fabric by an adhesive layer.
8. The flexible pressure sensor of claim 1, wherein the electrode layer comprises a plurality of electrode structures and conductive wires, the electrode structures being conductively connected with the pressure sensing layer, the conductive wires being conductively connected with the electrode structures.
9. The flexible pressure sensor of claim 8, wherein the electrode structure is an array of interdigitated electrode structures or an array of upper and lower electrode structures.
10. The flexible pressure sensor according to claim 9, wherein the array-type interdigital electrode structure has a front surface and a back surface opposite to the front surface, the pressure sensing layer is disposed on the front surface of the interdigital electrode structure, and the flexible fabric is attached to the back surface of the interdigital electrode structure.
11. The flexible pressure sensor of claim 9, wherein the arrayed upper and lower electrode structure comprises first and second electrodes, the flexible fabric comprises first and second flexible fabrics, the pressure sensing layer has a front side and a back side opposite the front side, the first electrode is disposed between the first flexible fabric and the front side of the pressure sensing layer, and the second electrode is disposed between the second flexible fabric and the back side of the pressure sensing layer.
12. The flexible pressure sensor of claim 8, wherein the conductive wire is coated with an insulating oil.
13. The flexible pressure sensor of claim 1, wherein the thickness of the pressure-sensitive layer and the support layer are the same.
14. The flexible pressure sensor of claim 1, wherein the thickness of the support layer is greater than the thickness of the pressure sensing layer.
15. The flexible pressure sensor of claim 1, wherein the thickness of the pressure sensitive layer is greater than the thickness of the support layer.
16. A wearable device comprising a flexible pressure sensor according to any of claims 1 to 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202222008120.9U CN217845456U (en) | 2022-08-01 | 2022-08-01 | Flexible pressure sensor and wearable equipment |
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| CN202222008120.9U CN217845456U (en) | 2022-08-01 | 2022-08-01 | Flexible pressure sensor and wearable equipment |
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| CN217845456U true CN217845456U (en) | 2022-11-18 |
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| CN202222008120.9U Active CN217845456U (en) | 2022-08-01 | 2022-08-01 | Flexible pressure sensor and wearable equipment |
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