CN210014750U - Capacitive elastic strain sensor and wearable product - Google Patents
Capacitive elastic strain sensor and wearable product Download PDFInfo
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- CN210014750U CN210014750U CN201921131878.3U CN201921131878U CN210014750U CN 210014750 U CN210014750 U CN 210014750U CN 201921131878 U CN201921131878 U CN 201921131878U CN 210014750 U CN210014750 U CN 210014750U
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Abstract
The utility model provides a capacitanc elastic strain sensor and wearable product to elasticity textile material is the base member, including elasticity anchor coat, first conducting layer, elasticity dielectric layer, second conducting layer, and elasticity encapsulated layer. The capacitive elastic strain sensor can be used in wearable products for detecting stress strain of body parts, such as joint bending, muscle stretching or bending, vertebral body stretching or bending, human breathing and the like, is comfortable and free of foreign body sensation, and can maintain performance stability of the sensor when being subjected to external forces such as folding, kneading, extruding and the like in practical application due to the fact that the thickness of the conductive layer is low.
Description
Technical Field
The utility model relates to a capacitanc strain sensor technical field, in particular to capacitanc elastic strain sensor and wearable product.
Background
With the development of wearable technology, especially the rise of smart clothes and smart wearing, flexible and even elastic devices are the mainstream trend of future smart clothes and smart wearing. Simultaneously, the size of device is also very important, and in wearable technical field, ultra-thin device is good with human laminating nature, can increase the wearing comfort level.
The flexible or even elastic ultrathin device is used for intelligent clothes and intelligent wearing, can increase wearing comfort, and can detect the motion of each joint, respiratory rate, spinal column or cervical vertebra bending state and the like of a human body, and is widely concerned by people in recent years.
The capacitance type elastic strain sensor reported in the prior art mainly has two structures, one is a capacitance structure formed by a high polymer elastomer and metal or conductive fiber in a certain shape, and the structure has the problems of poor elastic strain and limited measurement range of tensile strain; the other is that a high molecular elastomer and a liquid metal ductile electric conductor are combined to form a capacitor structure, and the structure generally adopts a preparation method of constructing a channel on the elastomer and then injecting the liquid metal into the channel, so that the process is complex. In addition, the two elastic strain sensors have larger thickness which generally reaches more than 1000 microns, are poorly attached to human bodies and have foreign body sensation. This is also one of the reasons why there are few reports of combining elastic strain sensors with textile materials. In addition to this, the bonding force of the elastic strain sensor to the textile material is another reason.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical current situation, the utility model provides a capacitanc elastic strain sensor to textile material is the base member, can regard as wearable device and survey stress strain such as tensile, the bending of health.
The technical scheme of the utility model is that: a capacitive elastic strain sensor, characterized by: the elastic textile material is taken as a substrate and comprises an elastic bonding layer, a first conducting layer, a second conducting layer, an elastic dielectric layer and an elastic packaging layer;
the elastic bonding layer has conductive insulation and is positioned on the surface of the substrate;
the first conducting layer is positioned on the surface of the elastomer bonding layer, is composed of conducting liquid, conducting slurry or conducting gel and is connected with an external first electrode;
the elastic dielectric layer has conductive insulativity and is positioned on the surface of the first conductive layer;
the second conducting layer is positioned on the surface of the elastic dielectric layer, is composed of conducting liquid, conducting slurry or conducting gel and is connected with an external second electrode;
the elastic packaging layer is used for packaging the first conducting layer and the second conducting layer.
The utility model discloses in, elasticity means can take place deformation such as bending, tensile under the exogenic action to have the performance of certain shape resilience when external force removes.
The textile material layer is a fabric formed by one or more of cotton, hemp, wool, silk, wool fabric, fiber and the like.
The elastic textile material is an elastic textile material, which may be made elastic by structural design, for example, by a rib weave, or by itself.
The material of the elastic bonding layer is not limited and includes elastic polymer materials and the like. Preferably, the elastic bonding layer is made of an elastic material having a good bonding ability with a textile material, such as one or more of thermoplastic elastomer (TPE), thermoplastic polyurethane elastomer rubber poly (TPU), dimethyl siloxane (PDMS), aliphatic aromatic random copolyester (Ecoflex), high molecular polymer resin, silicone rubber, hydrogel, polyurethane, and polyethylene octene co-elastomer (POE).
The material of the elastic dielectric layer is not limited and includes elastic polymer material and the like. Preferably, the elastic bonding layer is made of an elastic material having a good bonding ability with a textile material, such as one or more of thermoplastic elastomer (TPE), thermoplastic polyurethane elastomer rubber poly (TPU), dimethyl siloxane (PDMS), aliphatic aromatic random copolyester (Ecoflex), high molecular polymer resin, silicone rubber, hydrogel, polyurethane, and polyethylene octene co-elastomer (POE).
The material of the elastic packaging layer is not limited and includes elastic polymer materials and the like. Preferably, the elastic bonding layer is made of an elastic material having a good bonding ability with a textile material, such as one or more of thermoplastic elastomer (TPE), thermoplastic polyurethane elastomer rubber poly (TPU), dimethyl siloxane (PDMS), aliphatic aromatic random copolyester (Ecoflex), high molecular polymer resin, silicone rubber, hydrogel, polyurethane, and polyethylene octene co-elastomer (POE).
The conductive liquid is not limited, such as liquid metal, conductive ink, and the like.
The conductive gel is not limited, such as graphite conductive gel, silver gel, and the like.
The conductive paste is not limited and includes graphene paste, mixed paste of a conductive material and an elastomer, and the like. The mixed slurry of the conductive material and the elastomer includes, but is not limited to, a mixed slurry of a liquid metal and an elastomer, a mixed slurry of carbon powder and an elastomer, a mixed slurry of carbon fiber and an elastomer, a mixed slurry of graphene and an elastomer, a mixed slurry of a metal powder and an elastomer, and the like. Preferably, the liquid metal and the elastomer are mixed in a mass ratio of 100: (1-100) mixing to obtain slurry; the carbon powder and the elastomer are mixed according to the mass ratio of (1-100): 100 mixing into slurry; the carbon fiber and the elastomer are mixed according to the mass ratio of (1-100): 100 mixing into slurry; the graphene and the elastomer are mixed according to the mass ratio of (1-100): 100 mixing into slurry; the metal powder and the elastomer are mixed according to the mass ratio of (1-100): 100 are mixed into a slurry.
The liquid metal refers to a metal conductive material which is liquid at room temperature, and includes but is not limited to mercury, gallium-indium alloy, gallium-indium-tin alloy, and one or more doped gallium-indium alloy, gallium-indium-tin alloy and the like of transition metal and solid nonmetal elements.
The first electrode is used for conducting and connecting with an external device, and the materials of the first electrode are not limited and include metal materials, conductive cloth, graphene, graphite conductive adhesive, silver adhesive, liquid metal, a circuit board and the like.
The second electrode is used for conducting and connecting with an external device, and the materials of the second electrode are not limited and include metal materials, conductive cloth, graphene, graphite conductive adhesive, silver adhesive, liquid metal, a circuit board and the like.
Preferably, the first conductive layer has a thickness of less than 500um, preferably less than 100um, and may even be less than 10 um.
Preferably, the thickness of the second conductive layer is less than 500um, preferably less than 100um, and may even be less than 10 um.
Preferably, the first conductive layer has a pattern structure on the surface of the elastic bonding layer. The pattern is not limited, and includes one or more patterns of straight lines, sine lines, wavy lines, sawtooth waves, triangular waves, ellipses, rings, coil shapes, heart shapes and the like, which are parallel, crossed, stacked and the like.
Preferably, the second conductive layer has a pattern structure on the surface of the elastic dielectric layer. The pattern is not limited, and includes one or more patterns of straight lines, sine lines, wavy lines, sawtooth waves, triangular waves, ellipses, rings, coil shapes, heart shapes and the like, which are parallel, crossed, stacked and the like.
The utility model also provides a method of preparing this capacitanc elastic strain transducer, including following step:
(1) preparing an elastic bonding layer on the surface of the elastic textile material;
(2) preparing a first conductive layer on the surface of the elastic bonding layer;
(3) preparing an elastic dielectric layer on the surface of the first conductive layer;
(4) preparing a second conductive layer on the surface of the elastic dielectric layer;
(5) and preparing an elastic packaging layer on the surface of the second conductive layer.
In the step (1), the method for preparing the elastic bonding layer on the surface of the elastic textile material is not limited, and considering the material characteristics of the elastic textile material, the elastic bonding layer is preferably prepared on the surface of the textile material by adopting a hot pressing method.
In the step (2), the method for preparing the first conductive layer on the surface of the elastic bonding layer is not limited. The utility model discloses preferably adopt the fretwork template, place the template on the elastic bonding layer surface, then with conducting liquid, conductive paste or electrically conductive gel pouring, coating, printing or hot pressing in the fretwork of template, obtain first conducting layer, get rid of the template at last. The template is used for forming a first conducting layer, plays a role in conducting material boundary positioning in the first conducting layer preparation process, and can be directly and conveniently removed after the first conducting layer is formed. When the first conducting layer is in a certain pattern, the template is used for forming the patterned first conducting layer, the boundary positioning effect of the conducting material pattern is achieved in the preparation process of the first conducting layer, and the mold can be directly removed after the patterned first conducting layer is formed. Therefore the utility model provides a different and prior art's mask plate of mould effect, can obtain the less first conducting layer mould of three-dimensional size on the one hand, on the other hand can conveniently simply get rid of the mould material after filling conductive paste in the mould to can conveniently obtain the less first conducting layer of three-dimensional size, especially can conveniently obtain the less first conducting layer of thickness and width, its thickness is ultra-thin, can reach hundred microns of magnitude, preferred being less than 500um, more preferred being less than 100um, be less than 10um even.
In the step (3), the method for preparing the elastic dielectric layer on the surface of the first conductive layer is not limited, and includes printing, baking, hot pressing and the like.
In the step (4), the method for preparing the second conductive layer on the surface of the elastic dielectric layer is not limited. The utility model discloses preferably adopt the fretwork template, place the template on elasticity bonding layer surface, then with conducting liquid, conductive paste or electrically conductive gel pouring, coating, printing or hot pressing in the fretwork of template, obtain the second conducting layer, get rid of the template at last. The template is used for forming a second conducting layer, plays a role in conducting material boundary positioning in the second conducting layer preparation process, and can be directly and conveniently removed after the second conducting layer is formed. When the second conducting layer is in a certain pattern, the template is used for forming the patterned second conducting layer, the boundary positioning effect of the conducting material pattern is achieved in the preparation process of the second conducting layer, and the mold can be directly removed after the patterned second conducting layer is formed. Therefore the utility model provides a different and prior art's mask plate of mould effect, can obtain the less second conducting layer mould of three-dimensional size on the one hand, on the other hand can conveniently simply get rid of the mould material after filling conductive paste in the mould to can conveniently obtain the less second conducting layer of three-dimensional size, especially can conveniently obtain the less second conducting layer of thickness and width, its thickness is ultra-thin, can reach hundred microns of magnitude, preferred being less than 500um, more preferred being less than 100um, be less than 10um even.
In the step (5), the method for preparing the elastic packaging layer on the surface of the second conductive layer is not limited, and includes printing, baking, hot pressing and the like.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model combines the capacitance elastic strain sensor with the textile material, so the capacitance elastic strain sensor can be used in wearable equipment, for example, sewing with intelligent clothes or intelligent wearing or hot-pressing fit, and is used for detecting the stress strain of body parts, such as joint bending, muscle stretching or bending, vertebral body stretching or bending, etc., and the elasticity is comfortable;
(2) the utility model discloses a capacitanc elastic strain sensor thickness is lower, the free from extraneous matter sense, especially, the thickness of first conducting layer and second conducting layer can reach hundred microns magnitude, it is preferred to be less than 500um, more preferred be less than 100um, be less than 10um even to can improve the wearable nature and the travelling comfort of sensor, and receive external forces such as folding, rub in practical application when acting because the liquid metal level is ultra-thin and greatly reduced suffers the influence, thereby be favorable to improving the stability of performance of sensor.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of the capacitive elastic strain sensor of the present invention.
Fig. 2 is a tensile strain test chart of the capacitive elastic strain sensor according to embodiment 1 of the present invention.
The reference numerals in fig. 1 are: 1-elastic textile material, 2-elastic bonding layer, 3-first conductive layer, 4-elastic dielectric layer, 5-second conductive layer, 6-elastic packaging layer, 7-external first electrode, 8-external second electrode
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples, which are not intended to limit the invention, but are intended to facilitate the understanding of the invention.
Example 1:
in this embodiment, the capacitive elastic strain sensor structure is shown in fig. 1, and is formed by using an elastic textile material as a substrate, and an elastic bonding layer, a first conductive layer, a second conductive layer, an elastic dielectric layer, and an elastic encapsulation layer. The elastic bonding layer has conductive insulation and is positioned on the surface of the substrate; the first conducting layer is positioned on the surface of the elastomer bonding layer, is made of liquid metal and is connected with an external first electrode; the elastic dielectric layer has conductive insulativity and is positioned on the surface of the first conductive layer; the second conducting layer is positioned on the surface of the elastic dielectric layer, is composed of liquid metal and is connected with an external second electrode; the elastic packaging layer is used for packaging the first conducting layer and the second conducting layer.
In this embodiment, the elastic textile material is made of polyurethane fabric, the elastomer bonding layer, the elastomer dielectric layer, and the elastomer encapsulation layer are made of thermoplastic polyurethane elastomer rubber (TPU), the first conductive layer and the second conductive layer are made of liquid metal GaInSn, and the external first electrode and the external second electrode are made of copper sheets.
In this embodiment, the first conductive layer and the second conductive layer are both 100 μm thick.
In this embodiment, the preparation of the capacitive elastic strain sensor includes the following steps:
(1) forming an elastic bonding layer on the elastic textile material by adopting a hot pressing process;
(2) placing a hollow template on the surface of the elastic adhesive layer; then, filling liquid metal GaInSn in the template through printing; then, removing the template material to obtain a first conducting layer;
(3) attaching thin copper sheets to two ends of the first conducting layer prepared in the step (2) to be used as external first electrodes;
(4) forming an elastic dielectric layer on the surface of the first conductive layer by adopting a hot pressing process;
(5) placing a hollow template on the surface of the elastic dielectric layer; then, filling liquid metal GaInSn in the template through printing; then, removing the template material to obtain a second conducting layer;
(6) attaching thin copper sheets to two ends of the second conducting layer to serve as external second electrodes;
(7) and forming the elastic packaging layer on the surface of the second conductive layer by adopting a hot pressing process.
The manufactured capacitive elastic strain sensor can be sewn or hot-pressed and attached to intelligent clothes or intelligent wearing parts, such as knee pads, elbow pads, breathing belts, body correction belts, cervical vertebra belts and the like, is convenient and comfortable to wear, has the same experience feeling as common fabrics, can be used for detecting stress strain of body parts, such as joint bending, muscle stretching or bending, vertebral body stretching or bending and the like, and is particularly the same as common fabric experience feeling under the operations of stretching, bending, kneading, extruding and the like.
The elastic textile material-based capacitive elastic strain sensor prepared in the above way is subjected to tensile strain test, and the test result is shown in fig. 2, so that the tensile-capacitance change of the elastic strain sensor is linear change, the tensile is 30%, the capacitance change is about 500pF, and the change rate is large. In addition, because the liquid metal layer is ultra-thin, the influence of the liquid metal layer when the liquid metal layer is subjected to external force in practical application is greatly reduced, and the performance of the liquid metal layer has high stability.
Example 2:
in this embodiment, the structure of the capacitive elastic strain sensor is the same as that in embodiment 1, except that the first conductive layer is in a parallel sinusoidal pattern on the surface of the elastic adhesive layer, and the second conductive layer is in a parallel sinusoidal pattern on the surface of the elastic dielectric layer.
In this embodiment, the preparation of the capacitive elastic strain sensor includes the following steps:
(1) forming an elastic bonding layer on the elastic textile material by adopting a hot pressing process;
(2) placing a hollow template on the surface of the elastic adhesive layer; then, filling liquid metal GaInSn in the template through printing; then, removing the template material to obtain a first conductive layer in a parallel sine pattern;
(3) attaching thin copper sheets to two ends of each piece of liquid metal in the sine pattern prepared in the step (2) to serve as external first electrodes;
(4) forming an elastic dielectric layer on the surface of the first conductive layer by adopting a hot pressing process;
(5) placing a hollow template on the surface of the elastic dielectric layer; then, filling liquid metal GaInSn in the template through printing; then, removing the template material to obtain a second conductive layer in a parallel sinusoidal pattern;
(6) attaching thin copper sheets to two ends of the second conducting layer to serve as external second electrodes;
(7) and forming the elastic packaging layer on the surface of the second conductive layer by adopting a hot pressing process.
The capacitive elastic strain sensor prepared in the above way can be sewn or hot-pressed and attached to intelligent clothing or intelligent wearing such as knee pads, elbow pads, respiratory belts, body correction belts, cervical vertebra belts and the like, is convenient and comfortable to wear, has the same experience feeling as common fabrics, and can be used for detecting stress strain of body parts such as joint bending, muscle stretching or bending, vertebral body stretching or bending and the like. Especially when stretched, bent, kneaded, pressed, etc., as is common in fabric experience. And (3) carrying out tensile strain test on the elastic textile material-based capacitive elastic strain sensor, wherein the test result shows that the tensile-capacitance change of the elastic strain sensor is linear change and the change rate is large. In addition, because the liquid metal layer is ultra-thin, the influence of the liquid metal layer when the liquid metal layer is subjected to external force in practical application is greatly reduced, and the performance of the liquid metal layer has high stability.
Example 3:
in this embodiment, the capacitive elastic strain sensor structure is shown in fig. 1, and is formed by using an elastic textile material as a substrate, and an elastic bonding layer, a first conductive layer, a second conductive layer, an elastic dielectric layer, and an elastic encapsulation layer. The elastic bonding layer has conductive insulation and is positioned on the surface of the substrate; the first conducting layer is positioned on the surface of the elastomer bonding layer, is made of liquid metal and is connected with an external first electrode; the elastic dielectric layer has conductive insulativity and is positioned on the surface of the first conductive layer; the second conducting layer is positioned on the surface of the elastic dielectric layer, is composed of liquid metal and is connected with an external second electrode; the elastic packaging layer is used for packaging the first conducting layer and the second conducting layer.
In this embodiment, the elastic textile material is made of spandex fabric, the elastomer bonding layer, the elastomer dielectric layer, and the elastomer encapsulation layer are made of dimethyl siloxane (PDMS), the first conductive layer and the second conductive layer are made of liquid metal GaInSn, and the external first electrode and the external second electrode are made of conductive fabric.
In this embodiment, the first conductive layer and the second conductive layer are both 50 μm thick.
In this embodiment, the preparation of the capacitive elastic strain sensor includes the following steps:
(1) forming an elastic bonding layer on the elastic textile material by adopting a hot pressing process;
(2) placing a hollow template on the surface of the elastic adhesive layer; then, filling liquid metal GaInSn in the template through printing; then, removing the template material to obtain a first conducting layer;
(3) hot-pressing and attaching conductive cloth to two ends of the first conductive layer prepared in the step (2) to be used as an external first electrode;
(4) forming an elastic dielectric layer on the surface of the first conductive layer by adopting a hot pressing process;
(5) placing a hollow template on the surface of the elastic dielectric layer; then, filling liquid metal GaInSn in the template through printing; then, removing the template material to obtain a second conducting layer;
(6) hot-pressing and attaching conductive cloth at two ends of the second conductive layer to serve as an external second electrode;
(7) and forming the elastic packaging layer on the surface of the second conductive layer by adopting a hot pressing process.
The capacitive elastic strain sensor prepared in the above way can be sewn or hot-pressed and attached to intelligent clothing or intelligent wearing such as knee pads, elbow pads, respiratory belts, body correction belts, cervical vertebra belts and the like, is convenient and comfortable to wear, has the same experience feeling as common fabrics, and can be used for detecting stress strain of body parts such as joint bending, muscle stretching or bending, vertebral body stretching or bending and the like. Especially when stretched, bent, kneaded, pressed, etc., as is common in fabric experience. And (3) carrying out tensile strain test on the elastic textile material-based capacitive elastic strain sensor, wherein the test result shows that the tensile-capacitance change of the elastic strain sensor is linear change and the change rate is large. In addition, because the liquid metal layer is ultra-thin, the influence of the liquid metal layer when the liquid metal layer is subjected to external force in practical application is greatly reduced, and the performance of the liquid metal layer has high stability.
Example 4:
in this embodiment, the structure of the capacitive elastic strain sensor is the same as that in embodiment 3, except that the external first electrode and the external second electrode are polyimide circuit boards.
In this embodiment, the preparation of the capacitive elastic strain sensor includes the following steps:
(1) forming an elastic bonding layer on the elastic textile material by adopting a hot pressing process;
(2) placing a hollow template on the surface of the elastic adhesive layer; then, filling liquid metal GaInSn in the template through printing; then, removing the template material to obtain a first conducting layer;
(3) fixing a polyimide circuit board at two ends of the first conducting layer prepared in the step (2) as external first electrodes;
(4) forming an elastic dielectric layer on the surface of the first conductive layer by adopting a hot pressing process;
(5) placing a hollow template on the surface of the elastic dielectric layer; then, filling liquid metal GaInSn in the template through printing; then, removing the template material to obtain a second conducting layer;
(6) fixing a polyimide circuit board at two ends of the second conducting layer as an external second electrode;
(7) and forming the elastic packaging layer on the surface of the second conductive layer by adopting a hot pressing process.
The capacitive elastic strain sensor prepared in the above way can be sewn or hot-pressed and attached to intelligent clothing or intelligent wearing such as knee pads, elbow pads, respiratory belts, body correction belts, cervical vertebra belts and the like, is convenient and comfortable to wear, has the same experience feeling as common fabrics, and can be used for detecting stress strain of body parts such as joint bending, muscle stretching or bending, vertebral body stretching or bending and the like. Especially when stretched, bent, kneaded, pressed, etc., as is common in fabric experience. And (3) carrying out tensile strain test on the elastic textile material-based capacitive elastic strain sensor, wherein the test result shows that the tensile-capacitance change of the elastic strain sensor is linear change and the change rate is large. In addition, because the liquid metal layer is ultra-thin, the influence of the liquid metal layer when the liquid metal layer is subjected to external force in practical application is greatly reduced, and the performance of the liquid metal layer has high stability.
Example 5:
in this embodiment, the structure of the capacitive elastic strain sensor is the same as that in embodiment 1, except that the first conductive layer is made of graphene, and the second conductive layer is made of graphene.
In this embodiment, the preparation of the capacitive elastic strain sensor includes the following steps:
(1) forming an elastic bonding layer on the elastic textile material by adopting a hot pressing process;
(2) placing a hollow template on the surface of the elastic adhesive layer; then, filling the graphene slurry in the template through printing; then, removing the template material to obtain a first conducting layer;
(3) attaching thin copper sheets to two ends of the first conducting layer prepared in the step (2) to be used as external first electrodes;
(4) forming an elastic dielectric layer on the surface of the first conductive layer by adopting a hot pressing process;
(5) placing a hollow template on the surface of the elastic dielectric layer; then, filling the graphene slurry in the template through printing; then, removing the template material to obtain a second conducting layer;
(6) attaching thin copper sheets to two ends of the second conducting layer to serve as external second electrodes;
(7) and forming the elastic packaging layer on the surface of the second conductive layer by adopting a hot pressing process.
The capacitive elastic strain sensor prepared in the above way can be sewn or hot-pressed and attached to intelligent clothing or intelligent wearing such as knee pads, elbow pads, respiratory belts, body correction belts, cervical vertebra belts and the like, is convenient and comfortable to wear, has the same experience feeling as common fabrics, and can be used for detecting stress strain of body parts such as joint bending, muscle stretching or bending, vertebral body stretching or bending and the like. Especially when stretched, bent, kneaded, pressed, etc., as is common in fabric experience. And (3) carrying out tensile strain test on the elastic textile material-based capacitive elastic strain sensor, wherein the test result shows that the tensile-capacitance change of the elastic strain sensor is linear change and the change rate is large. In addition, because the liquid metal layer is ultra-thin, the influence of the liquid metal layer when the liquid metal layer is subjected to external force in practical application is greatly reduced, and the performance of the liquid metal layer has high stability.
Example 6:
in this embodiment, the structure of the capacitive elastic strain sensor is the same as that in embodiment 1, except that the first conductive layer is made of conductive ink, and the second conductive layer is made of conductive ink.
In this embodiment, the preparation of the capacitive elastic strain sensor includes the following steps:
(1) forming an elastic bonding layer on the elastic textile material by adopting a hot pressing process;
(2) placing a hollow template on the surface of the elastic adhesive layer; then, filling conductive ink in the template by printing; then, removing the template material to obtain a first conducting layer;
(3) attaching thin copper sheets to two ends of the first conducting layer prepared in the step (2) to be used as external first electrodes;
(4) forming an elastic dielectric layer on the surface of the first conductive layer by adopting a hot pressing process;
(5) placing a hollow template on the surface of the elastic dielectric layer; then, filling conductive ink in the template by printing; then, removing the template material to obtain a second conducting layer;
(6) attaching thin copper sheets to two ends of the second conducting layer to serve as external second electrodes;
(7) and forming the elastic packaging layer on the surface of the second conductive layer by adopting a hot pressing process.
The capacitive elastic strain sensor prepared in the above way can be sewn or hot-pressed and attached to intelligent clothing or intelligent wearing such as knee pads, elbow pads, respiratory belts, body correction belts, cervical vertebra belts and the like, is convenient and comfortable to wear, has the same experience feeling as common fabrics, and can be used for detecting stress strain of body parts such as joint bending, muscle stretching or bending, vertebral body stretching or bending and the like. Especially when stretched, bent, kneaded, pressed, etc., as is common in fabric experience. And (3) carrying out tensile strain test on the elastic textile material-based capacitive elastic strain sensor, wherein the test result shows that the tensile-capacitance change of the elastic strain sensor is linear change and the change rate is large. In addition, because the liquid metal layer is ultra-thin, the influence of the liquid metal layer when the liquid metal layer is subjected to external force in practical application is greatly reduced, and the performance of the liquid metal layer has high stability.
Example 7:
in this embodiment, the structure of the capacitive elastic strain sensor is the same as that in embodiment 1, except that the first conductive layer is made of a graphite conductive adhesive, and the second conductive layer is made of a graphite conductive adhesive.
In this embodiment, the preparation of the capacitive elastic strain sensor includes the following steps:
(1) forming an elastic bonding layer on the elastic textile material by adopting a hot pressing process;
(2) placing a hollow template on the surface of the elastic adhesive layer; then, filling the graphite conductive adhesive in the template through printing; then, removing the template material to obtain a first conducting layer;
(3) attaching thin copper sheets to two ends of the first conducting layer prepared in the step (2) to be used as external first electrodes;
(4) forming an elastic dielectric layer on the surface of the first conductive layer by adopting a hot pressing process;
(5) placing a hollow template on the surface of the elastic dielectric layer; then, filling the graphite conductive adhesive in the template through printing; then, removing the template material to obtain a second conducting layer;
(6) attaching thin copper sheets to two ends of the second conducting layer to serve as external second electrodes;
(7) and forming the elastic packaging layer on the surface of the second conductive layer by adopting a hot pressing process.
The capacitive elastic strain sensor prepared in the above way can be sewn or hot-pressed and attached to intelligent clothing or intelligent wearing such as knee pads, elbow pads, respiratory belts, body correction belts, cervical vertebra belts and the like, is convenient and comfortable to wear, has the same experience feeling as common fabrics, and can be used for detecting stress strain of body parts such as joint bending, muscle stretching or bending, vertebral body stretching or bending and the like. Especially when stretched, bent, kneaded, pressed, etc., as is common in fabric experience. And (3) carrying out tensile strain test on the elastic textile material-based capacitive elastic strain sensor, wherein the test result shows that the tensile-capacitance change of the elastic strain sensor is linear change and the change rate is large. In addition, because the liquid metal layer is ultra-thin, the influence of the liquid metal layer when the liquid metal layer is subjected to external force in practical application is greatly reduced, and the performance of the liquid metal layer has high stability.
The above-mentioned embodiment is right the technical scheme and the beneficial effect of the utility model have been explained in detail, it should be understood that above only be the concrete embodiment of the utility model, and not be used for the restriction the utility model discloses, the fan is in any modification and improvement etc. that the principle within range of the utility model was done all should be contained within the protection scope of the utility model.
Claims (8)
1. A capacitive elastic strain sensor, characterized by: the method comprises the following steps of taking an elastic textile material as a substrate, wherein the elastic textile material comprises an elastic bonding layer with conductive insulation, a first conductive layer consisting of conductive liquid, conductive slurry or conductive gel, a second conductive layer consisting of conductive liquid, conductive slurry or conductive gel, an elastic dielectric layer with conductive insulation and an elastic packaging layer;
the elastic bonding layer is positioned on the surface of the substrate;
the first conducting layer is positioned on the surface of the elastomer bonding layer and is connected with the external first electrode;
the elastic dielectric layer is positioned on the surface of the first conductive layer;
the second conducting layer is positioned on the surface of the elastic dielectric layer and is connected with an external second electrode;
the elastic packaging layer is used for packaging the first conducting layer and the second conducting layer.
2. A capacitive elastic strain sensor according to claim 1 wherein: the thickness of the first conductive layer is less than 500 μm.
3. A capacitive elastic strain sensor according to claim 1 wherein: the thickness of the first conductive layer is less than 100 μm.
4. A capacitive elastic strain sensor according to claim 1 wherein: the thickness of the first conductive layer is less than 10 μm.
5. A capacitive elastic strain sensor according to claim 1 wherein: the thickness of the second conductive layer is less than 500 μm.
6. A capacitive elastic strain sensor according to claim 1 wherein: the thickness of the second conductive layer is less than 100 μm.
7. A capacitive elastic strain sensor according to claim 1 wherein: the thickness of the second conductive layer is less than 10 μm.
8. A wearable product, characterized by: comprising a capacitive elastic strain sensor according to any one of claims 1 to 7.
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| CN201921131878.3U CN210014750U (en) | 2019-07-18 | 2019-07-18 | Capacitive elastic strain sensor and wearable product |
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| CN201921131878.3U CN210014750U (en) | 2019-07-18 | 2019-07-18 | Capacitive elastic strain sensor and wearable product |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021017841A1 (en) * | 2019-07-18 | 2021-02-04 | 宁波韧和科技有限公司 | Capacitive elastic strain sensor, and preparation method and use therefor |
| CN112522837A (en) * | 2020-11-05 | 2021-03-19 | 青岛大学 | Multi-stress sensing type intelligent electronic textile and preparation method thereof |
| WO2021238042A1 (en) * | 2020-05-25 | 2021-12-02 | 苏州大学 | Method for manufacturing liquid metal thin-film electrode, and flexible pressure sensor |
| KR20230057507A (en) * | 2021-10-21 | 2023-05-02 | 서울대학교산학협력단 | Strain Sensor and Manufacturing Method thereof |
| TWI805972B (en) * | 2020-12-04 | 2023-06-21 | 國立成功大學 | Smart clothes for sensing the physiological activity of the heart and breathing state of the lung |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021017841A1 (en) * | 2019-07-18 | 2021-02-04 | 宁波韧和科技有限公司 | Capacitive elastic strain sensor, and preparation method and use therefor |
| WO2021238042A1 (en) * | 2020-05-25 | 2021-12-02 | 苏州大学 | Method for manufacturing liquid metal thin-film electrode, and flexible pressure sensor |
| CN112522837A (en) * | 2020-11-05 | 2021-03-19 | 青岛大学 | Multi-stress sensing type intelligent electronic textile and preparation method thereof |
| CN112522837B (en) * | 2020-11-05 | 2022-06-07 | 青岛大学 | Multi-stress sensing type intelligent electronic textile and preparation method thereof |
| TWI805972B (en) * | 2020-12-04 | 2023-06-21 | 國立成功大學 | Smart clothes for sensing the physiological activity of the heart and breathing state of the lung |
| KR20230057507A (en) * | 2021-10-21 | 2023-05-02 | 서울대학교산학협력단 | Strain Sensor and Manufacturing Method thereof |
| KR102582412B1 (en) | 2021-10-21 | 2023-09-27 | 서울대학교산학협력단 | Strain Sensor and Manufacturing Method thereof |
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