CN115638714A - Resistance type flexible fabric position sensor - Google Patents
Resistance type flexible fabric position sensor Download PDFInfo
- Publication number
- CN115638714A CN115638714A CN202211322486.1A CN202211322486A CN115638714A CN 115638714 A CN115638714 A CN 115638714A CN 202211322486 A CN202211322486 A CN 202211322486A CN 115638714 A CN115638714 A CN 115638714A
- Authority
- CN
- China
- Prior art keywords
- conductive
- layer
- fabric
- elastic
- fabric layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004744 fabric Substances 0.000 title claims abstract description 178
- 239000004753 textile Substances 0.000 claims abstract description 111
- 238000002955 isolation Methods 0.000 claims abstract description 72
- 239000000463 material Substances 0.000 claims description 22
- 239000000853 adhesive Substances 0.000 claims description 20
- 230000001070 adhesive effect Effects 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 19
- 239000000835 fiber Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 17
- 238000007650 screen-printing Methods 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 14
- 238000009941 weaving Methods 0.000 claims description 13
- 238000007639 printing Methods 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 12
- 239000002759 woven fabric Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 6
- 239000002861 polymer material Substances 0.000 claims description 6
- 239000004745 nonwoven fabric Substances 0.000 claims description 4
- 229920001940 conductive polymer Polymers 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 abstract description 2
- 230000006698 induction Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 7
- 229920002635 polyurethane Polymers 0.000 description 7
- 239000004814 polyurethane Substances 0.000 description 7
- 229920000728 polyester Polymers 0.000 description 6
- 229910021389 graphene Inorganic materials 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000012943 hotmelt Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 229920006264 polyurethane film Polymers 0.000 description 3
- 238000009958 sewing Methods 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 229920002994 synthetic fiber Polymers 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229920004933 Terylene® Polymers 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000012886 linear function Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 229920006052 Chinlon® Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 1
- 239000003522 acrylic cement Substances 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000005314 correlation function Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009956 embroidering Methods 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 210000000245 forearm Anatomy 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920000172 poly(styrenesulfonic acid) Polymers 0.000 description 1
- 229920001197 polyacetylene Polymers 0.000 description 1
- 229920000128 polypyrrole Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229940005642 polystyrene sulfonic acid Drugs 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000013464 silicone adhesive Substances 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920006132 styrene block copolymer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Images
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a resistance-type flexible fabric position sensor which comprises a first conductive fabric layer, an elastic isolation layer and a second conductive fabric layer which are sequentially arranged from top to bottom; a plurality of through holes are densely distributed on the elastic isolation layer, contacts matched with the through holes are arranged on the first conductive textile layer or the second conductive textile layer, and a distance is reserved between the contacts and the second conductive textile layer or the first conductive textile layer on the other side; when pressure is applied to the surface of the first conductive fabric layer or the second conductive fabric layer, the contact is in contact with the second conductive fabric layer or the first conductive fabric layer on the other side through the through holes, and the resistance value corresponding to the force application position is output. The invention can realize distance pressing type induction and simultaneously give consideration to the characteristics of textiles, thereby practically solving the problem that the existing position sensor can not be well embedded into the clothes textiles, and having simple structure, stability, reliability, lower cost and strong universality.
Description
Technical Field
The invention belongs to the technical field of wearable electronic equipment, relates to an intelligent textile, and particularly relates to a resistance-type flexible fabric position sensor with a position detection function.
Background
With the development of technologies, especially the rapid advance of internet, wearable, internet of things, virtual reality, intelligent textile and other technologies, the demand of people for flexible sensor technologies for input, measurement and monitoring, and even for textile and fiber-based technologies, has been increasing since the 21 st century. One important sensing technology is position sensors. The position sensor is a sensor that can convert position information of an object to be measured into other physical quantities for measurement. The position sensor of the flexible textile base can provide effective position information on a man-machine interaction interface, and the information can be used as a one-dimensional input signal, curved surface distance measurement, other entertainment functions and the like. For example, integrating a fabric position sensor on the surface of a garment or sofa may allow manual compression of the garment or sofa to adjust the electronic device volume (one-dimensional input signal), integrating a fabric position sensor on the surface of a fabric strip may allow measurement of various body part dimensions (curved surface distance measurement), and integrating distance sensing on the surface of a fabric-based gaming device may allow for additional input (entertainment functions), etc.
Conventional position sensors may be used to detect position, length, distance, orientation, and the like. At present, the types of position sensors mainly comprise electromagnetic type, photoelectric type, capacitance type, contact type and the like, hard materials are used as main bodies, the position sensors do not have flexibility and water washing resistance, and the position sensors cannot be integrated into clothing textiles, so that the application of the position sensors in the fields of intelligent textiles and wearable electronic equipment is limited.
In the field of electromagnetic position sensor technology, for example, chinese patent application (publication No. CN 107843184A) discloses a wearable micro position sensor, which can provide position change of the sensor within 1 meter by using the electromagnetic wave radiation principle, and can be used for capturing human body motion. But it is only suitable for measuring the linear distance, and is not convenient for measuring the curve length, the human body dimension or the position information of the human body surface and the textile surface.
In the field of intelligent textile technology, although various textile and fiber substrate pressure sensors and matrixes exist at present, for example, chinese patent application (publication number: CN 113340480A) discloses a flexible pressure sensor and a preparation method thereof, which can realize discrete distance measurement by arranging a plurality of pressure sensing units on the surface of a textile. However, when the sensor is used as a position sensor, a one-dimensional high-density pressure sensor sequence needs to be arranged, the technology needs a considerable number of connecting lines and a distributed matrix scanning means to realize pressure measurement at different positions, and measured signals are similar to discrete functions (gear distribution), so that the sensor is difficult to have the characteristics of washability, drying ability, simple structure, simple circuit, one-dimensional input and the like, and the input mode of a wearable human-computer interaction interface is greatly limited by the complex equipment structure and data reading mode.
Disclosure of Invention
The invention aims to solve the technical problem of providing a resistance-type flexible fabric position sensor which is simple in structure, stable, reliable, low in cost and high in universality, can realize distance press type sensing, and simultaneously gives consideration to the characteristics of textiles such as flexibility, wearing, washing and drying, so that the problem that the conventional position sensor cannot be well embedded into clothing textiles is solved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a resistance-type flexible fabric position sensor comprises a first conductive fabric layer, an elastic isolation layer and a second conductive fabric layer which are sequentially arranged from top to bottom;
a plurality of through holes are densely distributed in the elastic isolation layer, contacts matched with the through holes are arranged on the first conductive textile layer or the second conductive textile layer, and a distance is reserved between the contacts and the second conductive textile layer or the first conductive textile layer on the other side; when pressure is applied to the surface of the first conductive textile layer or the second conductive textile layer, the contact is in contact with the second conductive textile layer or the first conductive textile layer on the other side through the through holes to be electrified and outputs a resistance value corresponding to the force application position.
As a preferable aspect of the present invention, each of the first conductive textile layer and the second conductive textile layer is provided with a conductive wire that outputs an electrical signal.
As a preferable scheme of the present invention, the first conductive textile layer and the second conductive textile layer are both woven by conductive fibers; the first conductive textile layer and the second conductive textile layer are both provided with plane conductive patterns, and the plane conductive patterns are formed by weaving a fabric weave structure or digital jacquard weave.
As a preferable scheme of the present invention, the surfaces of the first conductive textile layer and the second conductive textile layer are both coated with a conductive coating; the first conductive textile layer and the second conductive textile layer are woven fabrics, knitted fabrics, braided fabrics or non-woven fabrics.
In a preferred embodiment of the present invention, the conductive coating is a conductive polymer film.
As a preferable scheme of the present invention, the conductive coating is a conductive composite material, the conductive composite material includes a base material and conductive particles dispersed in the base material, and a planar conductive pattern is formed on the surfaces of the first conductive textile layer and the second conductive textile layer of the conductive composite material by means of screen printing, aperture plate printing, spraying or thermal bonding.
As a preferable scheme of the present invention, the elastic isolation layer is an elastic film or a fabric material, and the first conductive fabric layer and the second conductive fabric layer are both bonded to the elastic isolation layer by an adhesive.
As a preferred embodiment of the present invention, the elastic isolation layer is an elastic film, and the elastic film is made of an elastic polymer material;
the elastic isolation layer is directly attached to the first conductive fabric layer through a screen printing, orifice printing or spraying process, and one surface, far away from the first conductive fabric layer, of the elastic isolation layer is bonded with the second conductive fabric layer through an adhesive;
or the elastic isolation layer is directly attached to the second conductive fabric layer through a screen printing, orifice printing or spraying process, and one surface, far away from the second conductive fabric layer, of the elastic isolation layer is bonded with the first conductive fabric layer through an adhesive;
or the elastic isolation layer is directly attached to the first conductive fabric layer and the second conductive fabric layer through a screen printing, orifice printing or spraying process, and the elastic isolation layer attached to the first conductive fabric layer is bonded with the elastic isolation layer attached to the second conductive fabric layer through an adhesive.
In a preferred embodiment of the present invention, the elastic isolation layer is a fabric material, the fabric material is woven by elastic yarns and non-elastic yarns, one surface of the elastic isolation layer is connected to the first conductive fabric layer by a three-dimensional weaving process, and the other surface of the elastic isolation layer is connected to the second conductive fabric layer by a three-dimensional weaving process.
As a preferable aspect of the present invention, the elastic isolation layer is an elastic film or a fabric material, and the first conductive fabric layer and the second conductive fabric layer are connected to the elastic isolation layer by sewing threads.
Compared with the prior art, the resistance type flexible fabric position sensor provided by the invention has the beneficial effects that:
the resistance-type flexible fabric position sensor can be used as position measuring equipment, length and angle measuring equipment, one-dimensional signal input equipment and the like, has strong universality, and is superior to the traditional photoelectric position sensor only having the position and distance measuring function; secondly, because the one-dimensional vector type resistance signal is easy to read, complex signal reading means such as distributed matrix scanning and the like are not needed, only the one-dimensional vector signal of the resistance value is output, the connection is simple, the data reading is simple, the cost and the energy consumption of a data acquisition module can be saved, and the method is superior to a matrix type position sensor formed by combining a flexible pressure sensor matrix; in addition, the first conductive fabric layer, the second conductive fabric layer and the elastic isolation layer have the specific properties of textiles such as lightness, thinness, softness, comfort, machine washing and drying, the bending fatigue resistance, the shearing fatigue resistance and the compression fatigue resistance of the fabric are strong, the fabric can be well embedded into clothes textiles, the position information related to a human body can be accurately measured, and the fabric is superior to the traditional hard photoelectric or silicon-based electronic components.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a schematic structural diagram of a resistive flexible web position sensor according to an embodiment of the present invention;
FIG. 2 is an exploded view of a first planar conductive pattern designed on a resistive flexible fabric position sensor;
FIG. 3 is an exploded view of a second planar conductive pattern designed on a resistive flexible web position sensor;
FIG. 4 is an exploded view of a third planar conductive pattern designed on a resistive flexible web position sensor;
FIG. 5 is an exploded view of a fourth planar conductive pattern designed on a resistive flexible web position sensor;
FIG. 6 is a theoretical and actual measured curve of the output resistance of the resistive flexible position sensor versus the amount of length measured.
The labels in the figure are:
a first conductive textile layer 1; an elastic isolation layer 2; a second conductive textile layer 3; a through hole 4; a contact 5; a conductive line 6; a planar conductive pattern 7.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are used only to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
Referring to fig. 1, a preferred embodiment of the present invention provides a resistive flexible fabric position sensor, which includes a first conductive fabric layer 1, an elastic isolation layer 2, and a second conductive fabric layer 3 sequentially disposed from top to bottom.
A plurality of through holes 4 are densely distributed on the elastic isolation layer 2, contacts 5 matched with the through holes 4 are arranged on the first conductive textile layer 1 or the second conductive textile layer 3, and a distance is reserved between the contacts 5 and the second conductive textile layer 3 or the first conductive textile layer 1 on the other side; when pressure is applied to the surface of the first conductive textile layer 1 or the second conductive textile layer 3, the contact 5 is electrically connected to the second conductive textile layer 3 or the first conductive textile layer 1 on the other side through the through holes 4, and outputs a resistance value corresponding to the position of the applied force. Wherein the first conductive textile layer 1 and the second conductive textile layer 3 are both provided with conductive wires 6 outputting electrical signals. It should be noted that the conductive wire 6 can be disposed outside the conductive fabric layer, i.e. a separate conductive wire; the conductive fabric layer can also be arranged on the conductive fabric layer, namely the conductive fabric layer plays a role of a conductive wire and directly outputs an electric signal. The conductive fabric layer is connected with the conductive wire 6 in a welding, bonding, sewing, hot pressing, embroidering or weaving mode and the like, and the connection is simple and easy without complex wiring. When the resistance-type flexible fabric position sensor is used, the first conductive fabric layer 1 and the second conductive fabric layer 3 are respectively connected with a rear end circuit through the conductive wires 6. When pressure is applied to the surface of the first conductive textile layer 1 or the second conductive textile layer 3, the contact 5 is electrically connected with the second conductive textile layer 3 or the first conductive textile layer 1 on the other side through the through holes 4, and the first conductive textile layer 1, the second conductive textile layer 3, the conductive wire 6 and the back end circuit form a loop. Therefore, pressure is applied to different positions of the first conductive textile layer 1 or the second conductive textile layer 3, and the linear function relationship between the output resistance and the first conductive textile layer 1 and the linear function relationship between the output resistance and the second conductive textile layer 3 are respectively obtained by measuring the resistance values at the corresponding positions. Through measuring corresponding resistance value, substitute in the correlation function to obtain the positional information (such as length value, angle measurement value etc.) of application of force position, can be applicable to wearable intelligent fabrics relevant with the fabrics such as intelligent chi, intelligent shoes and shoe-pad, intelligent schoolbag, intelligent cushion, intelligent mattress, intelligent clothing, provide functions such as position measurement, angle measurement and signal input, the commonality is stronger. For example, when the position sensor of the resistance-type flexible fabric is integrated at the position of the upper arm or the waist of the garment, the dimension or the waist of the upper arm can be measured anytime and anywhere; when the position sensor is integrated on the forearm position of the clothes, the position sensor can be used as an adjustable resistor to dynamically adjust the state of the wearable equipment (such as adjusting the volume of an earphone or the brightness of a luminous clothes).
Therefore, the resistance-type flexible fabric position sensor can be used as position measuring equipment, length and angle measuring equipment, one-dimensional signal input equipment and the like, has strong universality, and is superior to the traditional photoelectric position sensor only having the position and distance measuring function; secondly, because the one-dimensional vector type resistance signal is easy to read, complex signal reading means such as distributed matrix scanning and the like are not needed, only the one-dimensional vector signal of the resistance value is output, the connection is simple, the data reading is simple, the cost and the energy consumption of a data acquisition module can be saved, and the method is superior to a matrix type position sensor formed by combining a flexible pressure sensor matrix; in addition, the first conductive fabric layer 1, the second conductive fabric layer 3 and the elastic isolation layer 2 have the unique properties of textiles such as being light, thin, soft, comfortable, machine washable and dryable, and the like, have strong bending fatigue resistance, shearing fatigue resistance and compression fatigue resistance, can be well embedded into clothes textiles, accurately measure the position information related to a human body, and are superior to the traditional hard photoelectric or silicon-based electronic components.
It should be noted that in some embodiments, the contact 5 is a protrusion structure, and when pressure is applied to the surface of the first conductive textile layer 1 or the second conductive textile layer 3, the contact 5 can extend into the through hole 4, that is, without applying excessive pressure, the first conductive textile layer 1 and the second conductive textile layer 3 can be well contacted and electrified.
Illustratively, the first conductive textile layer 1 and the second conductive textile layer 3 are both woven from conductive fibers. The first conductive textile layer 1 and the second conductive textile layer 3 are both provided with a planar conductive pattern 7, and the planar conductive pattern 7 is formed by a textile weave structure or digital jacquard weaving. The conductive fiber is metal-plated fiber (such as silver-plated fiber, copper-plated fiber or gold-plated fiber), fiber containing metal components (such as stainless steel fiber), conductive fiber or carbon fiber filament prepared from conductive composite material (such as polyamide/graphene, polyimide/carbon nanotube or combination of various chemical fibers and conductive particles). The planar conductive pattern 7 is in an arbitrary shape such as a straight line, a wavy shape, a curved line, a triangle, a rectangle, a square, an artistic pattern, or the like.
Illustratively, the surfaces of the first conductive textile layer 1 and the second conductive textile layer 3 are coated with a conductive coating. The first conductive fabric layer 1 and the second conductive fabric layer 3 are woven fabrics, knitted fabrics or non-woven fabrics, and the components of the fabric are natural fibers (such as cotton, wool, silk or hemp) and artificial fibers (such as chinlon, terylene and the like) or natural fibers and artificial fibers in a blended mode, and preferably terylene plain woven fabrics. The conductive coating is a conductive polymer film or a conductive composite material.
When the conductive coating is made of a conductive composite material, the conductive composite material comprises a base material and conductive particles dispersed in the base material, the base material is made of a high polymer material (such as silicon rubber, polyurethane, polyamide, polyimide or polyester), and the conductive particles are made of carbon fibers, carbon nanotubes, graphite particles, graphene, carbon black or metal powder. The conductive composite material is formed with a planar conductive pattern 7 on the surfaces of the first conductive textile layer 1 and the second conductive textile layer 3 by means of screen printing, orifice printing, spraying or thermal bonding. The conductive composite material is preferably a composite material of graphene and silicone rubber, and the coating process is preferably screen printing. The planar conductive pattern 7 is in an arbitrary shape such as a straight line, a wave shape, a curve, a triangle, a rectangle, a square, an artistic pattern, or the like.
Illustratively, the elastic isolation layer 2 is an elastic film or a fabric material, and the first conductive fabric layer 1 and the second conductive fabric layer 3 are both bonded to the elastic isolation layer 2 by an adhesive. When the elastic film is adopted, the material is an elastic high polymer material (such as silica gel, polyurethane and the like); when a woven fabric material is used, the type of the woven fabric material is a woven fabric, a knitted fabric, a woven fabric, or a nonwoven fabric, and the material is a natural cellulose fiber, a synthetic fiber, or the like, and is preferably a warp-knitted elastic fabric made of polyurethane filaments.
Illustratively, the elastic isolation layer 2 is an elastic film made of an elastic polymer material (such as silicone, polyurethane, etc.); the elastic isolation layer 2 is directly attached to the first conductive fabric layer 1 through a screen printing, orifice printing or spraying process, and one surface, far away from the first conductive fabric layer 1, of the elastic isolation layer 2 is bonded with the second conductive fabric layer 3 through an adhesive; or the elastic isolation layer 2 is directly attached to the second conductive fabric layer 3 through a screen printing, orifice printing or spraying process, and one surface, far away from the second conductive fabric layer 3, of the elastic isolation layer 2 is bonded with the first conductive fabric layer 1 through an adhesive; or, the elastic isolation layer 2 is directly attached to the first conductive fabric layer 1 and the second conductive fabric layer 3 through a screen printing, orifice printing or spraying process, and the elastic isolation layer 2 attached to the first conductive fabric layer 1 and the elastic isolation layer 2 attached to the second conductive fabric layer 3 are bonded through an adhesive, that is, do not exist in the form of a single isolation layer.
The adhesive may be selected from a hot melt TPU film, a silicone adhesive, an acrylic adhesive, a phenolic adhesive, or an epoxy adhesive, and is preferably a hot melt polyurethane film.
Illustratively, the elastic isolation layer 2 is made of a fabric material, the fabric material is formed by weaving elastic yarns and non-elastic yarns, one surface of the elastic isolation layer 2 is connected with the first conductive fabric layer 1 through a three-dimensional weaving process, and the other surface of the elastic isolation layer 2 is connected with the second conductive fabric layer 3 through a three-dimensional weaving process, namely, the surface of the conductive fabric layer is formed by weaving at one time without additionally attaching an isolation layer.
Illustratively, the elastic isolation layer 2 is an elastic film or a fabric material, and the first conductive fabric layer 1 and the second conductive fabric layer 3 are connected with the elastic isolation layer 2 through sewing threads.
It should be noted that the elastic isolation layer 2 is provided with a plurality of through holes 4, and the shape of the through holes 4 can be circular, square or linear. By varying the thickness, modulus of elasticity, number, size or position of the through-holes 4 of the elastic isolation layer 2; alternatively, the resolution and sensitivity of the resistive flexible fabric position sensor can be adjusted to accommodate different use cases by changing the thickness, size or conductivity of the conductive coating.
Taking the example of applying pressure to the surface of the first conductive fabric layer 1, the resistive flexible fabric position sensor according to the preferred embodiment of the present invention has the following three forms:
(1) Length amount for detecting force application position:
referring to fig. 1 to 3, the resistive flexible fabric position sensor of the present invention has a three-layer structure, which includes a first conductive fabric layer 1, an elastic isolation layer 2, and a second conductive fabric layer 3 sequentially disposed from top to bottom.
Wherein, the first conductive fabric layer 1 and the second conductive fabric layer 3 are both provided with conductive wires 6 for outputting electrical signals. The first conductive textile layer 1 and the second conductive textile layer 3 are preferably polyester plain woven fabrics, the surfaces of the first conductive textile layer 1 and the second conductive textile layer 3 are coated with conductive coatings, and the conductive coatings are preferably graphene silica gel composite materials. The conductive coating is formed with a linear planar conductive pattern 7 on the surface of the first conductive textile layer 1 by a screen printing process, and two or more parallel linear planar conductive patterns 7 on the surface of the second conductive textile layer 3. The first conductive fabric layer 1 and the second conductive fabric layer 3 are both bonded with the elastic isolation layer 2 through an adhesive, the elastic isolation layer 2 is preferably a warp-knitted elastic knitted fabric woven by polyurethane filaments, and the adhesive is preferably a hot-melt polyurethane film.
A plurality of through holes 4 are densely distributed on the elastic isolation layer 2, contacts 5 matched with the through holes 4 are arranged on the first conductive textile layer 1 or the second conductive textile layer 3, and a distance is reserved between the contacts 5 and the second conductive textile layer 3 or the first conductive textile layer 1 on the other side; in use, the first and second conductive textile layers 1 and 3 are each connected to a back end circuit by a conductive wire 6. When pressure is applied to the surface of the first conductive fabric layer 1, the contact 5 is contacted and electrified with the second conductive fabric layer 3 on the other side through the through hole 4 and outputs a resistance value corresponding to the force application position, and at the moment, the first conductive fabric layer 1, the second conductive fabric layer 3, the conductive wire 6 and the back end circuit form a loop. Pressure is applied to different positions on the surface of the first conductive fabric layer 1, the output resistance of the sensor changes along with the position change of the applied pressure, and the output resistance and the force application position are in a linear relation. By measuring the resistance value, the length of the force application position can be detected. The theoretical and actual measured curves of the output resistance versus the measured length for a set of samples are given in fig. 6.
(2) Angular amount for detection position:
referring to fig. 1 and 4, the resistive flexible fabric position sensor of the present invention has a three-layer structure, which includes a first conductive fabric layer 1, an elastic isolation layer 2, and a second conductive fabric layer 3 sequentially disposed from top to bottom.
Wherein, the first conductive textile layer 1 and the second conductive textile layer 3 are both provided with conductive wires 6 for outputting electrical signals. The first conductive fabric layer 1 is preferably polyester plain weave fabric, the surface of the first conductive fabric layer 1 is coated with a conductive coating, the conductive coating is preferably graphene silica gel composite material or intrinsic conductive high polymer materials such as polypyrrole, polyacetylene and poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid, and the conductive coating is formed with a ratchet-shaped plane conductive pattern 7 on the surface of the first conductive fabric layer 1 through a screen printing process; the second conductive textile layer 3 is preferably a polyester woven conductive textile woven from silver-plated fibers. The first conductive fabric layer 1 and the second conductive fabric layer 3 are both bonded with the elastic isolation layer 2 through an adhesive, the elastic isolation layer 2 is preferably a warp-knitted elastic knitted fabric woven by polyurethane filaments, and the adhesive is preferably a hot-melt polyurethane film.
A plurality of through holes 4 are densely distributed on the elastic isolation layer 2, contacts 5 matched with the through holes 4 are arranged on the first conductive textile layer 1 or the second conductive textile layer 3, and a distance is reserved between the contacts 5 and the second conductive textile layer 3 or the first conductive textile layer 1 on the other side; in use, the first and second conductive fabric layers 1, 3 are each connected to the back end circuitry by conductive wires 6. When pressure is applied to the surface of the first conductive fabric layer 1, the contact 5 is contacted and electrified with the second conductive fabric layer 3 on the other side through the through hole 4 and outputs a resistance value corresponding to the force application position, and at the moment, the first conductive fabric layer 1, the second conductive fabric layer 3, the conductive wire 6 and the back end circuit form a loop. Pressure is applied to different positions on the surface of the first conductive fabric layer 1, the output resistance of the sensor changes along with the position change of the applied pressure, and the output resistance and the force application position are in a linear relation. By measuring the resistance value, the angle amount of the force application position can be detected.
(3) Orientation information for detecting the position of application of force:
referring to fig. 1 and 5, the resistive flexible fabric position sensor of the present invention has a three-layer structure, which includes a first conductive fabric layer 1, an elastic isolation layer 2, and a second conductive fabric layer 3 sequentially disposed from top to bottom.
Wherein, the first conductive textile layer 1 and the second conductive textile layer 3 are both provided with conductive wires 6 for outputting electrical signals. The first conductive fabric layer 1 is preferably a conductive fabric layer which is formed by weaving nylon conductive yarns and cotton-polyester blended yarns together with S-shaped roundabout plane conductive patterns by using a jacquard loom, and the second conductive fabric layer 3 is preferably a polyester woven conductive fabric woven by copper-plated nickel fibers. The first conductive fabric layer 1 and the second conductive fabric layer 3 are both bonded with the elastic isolation layer 2 through an adhesive, the elastic isolation layer 2 is preferably a warp-knitted elastic knitted fabric woven by polyurethane filaments, and the adhesive is preferably a styrene block copolymer type thermoplastic elastic.
A plurality of through holes 4 are densely distributed on the elastic isolation layer 2, contacts 5 matched with the through holes 4 are arranged on the first conductive textile layer 1 or the second conductive textile layer 3, and a distance is reserved between the contacts 5 and the second conductive textile layer 3 or the first conductive textile layer 1 on the other side; in use, the first and second conductive textile layers 1 and 3 are each connected to a back end circuit by a conductive wire 6. When pressure is applied to the surface of the first conductive fabric layer 1, the contact 5 is contacted and electrified with the second conductive fabric layer 3 on the other side through the through hole 4 and outputs a resistance value corresponding to the force application position, and at the moment, the first conductive fabric layer 1, the second conductive fabric layer 3, the conductive wire 6 and the back end circuit form a loop. Pressure is applied to different positions on the surface of the first conductive fabric layer 1, the output resistance of the sensor changes along with the position change of the applied pressure, and the output resistance and the force application position are in a linear relation. By measuring the resistance value, the direction information (such as length value, angle quantity and the like) of the force application position can be detected.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A resistance-type flexible fabric position sensor is characterized by comprising a first conductive fabric layer, an elastic isolation layer and a second conductive fabric layer which are sequentially arranged from top to bottom;
a plurality of through holes are densely distributed on the elastic isolation layer, contacts matched with the through holes are arranged on the first conductive fabric layer or the second conductive fabric layer, and a distance is reserved between the contacts and the second conductive fabric layer or the first conductive fabric layer on the other side; when pressure is applied to the surface of the first conductive textile layer or the second conductive textile layer, the contact is in contact with the second conductive textile layer or the first conductive textile layer on the other side through the through holes to be electrified and outputs a resistance value corresponding to the force application position.
2. The resistive flexible fabric position sensor of claim 1, wherein the first and second conductive fabric layers are each provided with conductive wires that output an electrical signal.
3. The resistive flexible fabric position sensor of claim 1, wherein the first and second conductive fabric layers are each woven from conductive fibers; the first conductive textile layer and the second conductive textile layer are both provided with plane conductive patterns, and the plane conductive patterns are formed by weaving a fabric weave structure or digital jacquard weave.
4. The resistive flexible fabric position sensor of claim 1, wherein the surfaces of the first and second conductive fabric layers are each coated with a conductive coating; the first conductive textile layer and the second conductive textile layer are woven fabrics, knitted fabrics, braided fabrics or non-woven fabrics.
5. The resistive flexible fabric position sensor of claim 4, wherein the conductive coating is a conductive polymer film.
6. The resistive flexible fabric position sensor of claim 4, wherein the conductive coating is a conductive composite material comprising a substrate and conductive particles dispersed within the substrate, and the conductive composite material is formed with a planar conductive pattern on the surfaces of the first and second conductive fabric layers by screen printing, orifice printing, spraying, or thermal bonding.
7. The resistive flexible fabric position sensor of claim 1, wherein the elastic isolation layer is an elastic film or a fabric material, and the first conductive fabric layer and the second conductive fabric layer are both bonded to the elastic isolation layer by an adhesive.
8. The position sensor of claim 1, wherein the elastic isolation layer is an elastic film made of an elastic polymer material;
the elastic isolation layer is directly attached to the first conductive fabric layer through a screen printing, orifice printing or spraying process, and one surface, far away from the first conductive fabric layer, of the elastic isolation layer is bonded with the second conductive fabric layer through an adhesive;
or the elastic isolation layer is directly attached to the second conductive fabric layer through a screen printing, orifice printing or spraying process, and one surface, far away from the second conductive fabric layer, of the elastic isolation layer is bonded with the first conductive fabric layer through an adhesive;
or the elastic isolation layer is directly attached to the first conductive fabric layer and the second conductive fabric layer through a screen printing, orifice printing or spraying process, and the elastic isolation layer attached to the first conductive fabric layer is bonded with the elastic isolation layer attached to the second conductive fabric layer through an adhesive.
9. The resistive flexible fabric position sensor of claim 1, wherein the elastic isolation layer is a fabric material, the fabric material is woven from elastic yarns and non-elastic yarns, one side of the elastic isolation layer is connected to the first conductive fabric layer by a three-dimensional weaving process, and the other side of the elastic isolation layer is connected to the second conductive fabric layer by a three-dimensional weaving process.
10. The resistive flexible web position sensor of claim 1, wherein the elastic isolation layer is an elastic film or a web material, and the first and second conductive web layers are connected to the elastic isolation layer by stitching.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211322486.1A CN115638714B (en) | 2022-10-27 | 2022-10-27 | Resistance type flexible fabric position sensor |
| ZA2023/06804A ZA202306804B (en) | 2022-10-27 | 2023-07-04 | A resistive flexible fabric position sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211322486.1A CN115638714B (en) | 2022-10-27 | 2022-10-27 | Resistance type flexible fabric position sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115638714A true CN115638714A (en) | 2023-01-24 |
| CN115638714B CN115638714B (en) | 2024-02-06 |
Family
ID=84947018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211322486.1A Active CN115638714B (en) | 2022-10-27 | 2022-10-27 | Resistance type flexible fabric position sensor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115638714B (en) |
| ZA (1) | ZA202306804B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105931909A (en) * | 2016-06-23 | 2016-09-07 | 珠海安润普科技有限公司 | Flexible fabric switch |
| CN205863059U (en) * | 2016-06-23 | 2017-01-04 | 珠海安润普科技有限公司 | A kind of flexible fabric switch |
| CN106644194A (en) * | 2017-01-23 | 2017-05-10 | 珠海安润普科技有限公司 | Resistance type pressure sensor and wearable device |
| CN106783314A (en) * | 2017-01-12 | 2017-05-31 | 珠海安润普科技有限公司 | A kind of sheet pressure switch |
| CN206504812U (en) * | 2017-01-23 | 2017-09-19 | 珠海安润普科技有限公司 | Resistor-type pressure sensor and wearable device |
| CN107488915A (en) * | 2017-10-10 | 2017-12-19 | 东华大学 | A kind of machine-knitted structure Stretchable fabric circuit board and wearable device |
| CN114808241A (en) * | 2022-03-31 | 2022-07-29 | 魏桥纺织股份有限公司 | Breathable capacitive flexible array pressure sensor based on textile structure and preparation method thereof |
-
2022
- 2022-10-27 CN CN202211322486.1A patent/CN115638714B/en active Active
-
2023
- 2023-07-04 ZA ZA2023/06804A patent/ZA202306804B/en unknown
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105931909A (en) * | 2016-06-23 | 2016-09-07 | 珠海安润普科技有限公司 | Flexible fabric switch |
| CN205863059U (en) * | 2016-06-23 | 2017-01-04 | 珠海安润普科技有限公司 | A kind of flexible fabric switch |
| CN106783314A (en) * | 2017-01-12 | 2017-05-31 | 珠海安润普科技有限公司 | A kind of sheet pressure switch |
| CN106644194A (en) * | 2017-01-23 | 2017-05-10 | 珠海安润普科技有限公司 | Resistance type pressure sensor and wearable device |
| CN206504812U (en) * | 2017-01-23 | 2017-09-19 | 珠海安润普科技有限公司 | Resistor-type pressure sensor and wearable device |
| CN107488915A (en) * | 2017-10-10 | 2017-12-19 | 东华大学 | A kind of machine-knitted structure Stretchable fabric circuit board and wearable device |
| CN114808241A (en) * | 2022-03-31 | 2022-07-29 | 魏桥纺织股份有限公司 | Breathable capacitive flexible array pressure sensor based on textile structure and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 胡吉永: "纺织敏感材料与传感器", 胡吉永 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA202306804B (en) | 2024-02-28 |
| CN115638714B (en) | 2024-02-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110926661B (en) | Flexible fabric pressure and strain composite sensor | |
| CN107692376A (en) | A kind of Sign Language Recognition Intelligent glove of integrated weaving base ess-strain sensing network | |
| CN107710432A (en) | Piezoelectric element and use its equipment | |
| CN107488915A (en) | A kind of machine-knitted structure Stretchable fabric circuit board and wearable device | |
| CN110042544B (en) | Flexible intelligent wearable device | |
| WO2015014950A1 (en) | Textile pressure sensor and method for fabricating the same | |
| CN112095202A (en) | Fabric pressure sensing array | |
| CN106996796B (en) | wearable motion sensing device | |
| CN110440958A (en) | A kind of capacitance pressure transducer, based on warp-knitted spacer fabric | |
| Kuroda et al. | Woven electronic textiles | |
| CN118131947A (en) | Fabric touch equipment | |
| CN115638714B (en) | Resistance type flexible fabric position sensor | |
| CN110411622B (en) | All-textile stress sensor | |
| CN113820049A (en) | Fabric pressure sensor, preparation method thereof and fabric pressure sensor array | |
| KR101471271B1 (en) | Temperature Responsive Fiber Structure | |
| CN211317588U (en) | Flexible pressure sensor | |
| KR20110109716A (en) | Conductive fabrics and method of manufacturing the same | |
| KR20190057812A (en) | Electronic Textile Temperature Sensors and Clothing Using the Same | |
| Gu | Advances in textile-based flexible temperature sensors | |
| CN109725028A (en) | Humidity sensor and wearable device with it | |
| CN113358249B (en) | Fabric type piezoresistive sensor array and intelligent object | |
| CN207396401U (en) | Humidity sensor and with its wearable device | |
| CN221650912U (en) | Fabric touch pad | |
| CN110477928B (en) | Tensile stress sensor and bending sensor | |
| CN112444330A (en) | Fabric separating pressure sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |