CN115638714A - Resistance type flexible fabric position sensor - Google Patents

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

A resistive flexible fabric position sensor

technical field

The invention belongs to the technical field of wearable electronic equipment, relates to an intelligent textile, in particular to a resistive flexible fabric position sensor with a position detection function.

Background technique

Since the 21st century, with the development of science and technology, especially the rapid development of technologies such as the Internet, wearables, Internet of Things, virtual reality and smart textiles, people have flexible and even textile and fiber-based sensor technologies for input, measurement and monitoring. The need is growing. Among them, an important sensing technology is the position sensor. A position sensor refers to a type of sensor that can convert the position information of the measured object into other physical quantities that are easy to measure. The flexible textile-based position sensor can provide effective position information at the human-computer interface, which can be used as a one-dimensional input signal, surface distance measurement and other entertainment functions, etc. For example, integrating fabric position sensors on the surface of clothing or sofas can be used to manually press clothing or sofas to adjust the volume of electronic equipment (one-dimensional input signal), and integrating fabric position sensors on the surface of fabric strips can be used to measure the dimensions of various parts of the human body (surface distance measurement ), and the integration on the surface of the fabric-based game device can realize distance sensing as an auxiliary input (entertainment function), etc.

Traditional position sensors can be used to detect position, length, distance and orientation, etc. At present, the types of position sensors mainly include electromagnetic type, photoelectric type, capacitive type, contact type, etc., all of which are mainly made of hard materials, which do not have softness and washability, and cannot be integrated into clothing textiles, which limits the position sensor. Applications in the fields of smart textiles and wearable electronics.

In the field of electromagnetic position sensor technology, such as Chinese patent application (publication number: CN107843184A) discloses a wearable miniature position sensor, which can give the position change of the sensor within 1 meter by using the principle of electromagnetic wave radiation, and can be used for human body movements catch. However, it is only suitable for the measurement of straight-line distances, and it is not convenient to measure the length of curves, the dimensions of the human body, or the position information of the surface of the human body and the surface of textiles.

In the field of intelligent textile technology, although there are pressure sensors and matrices of various textile and fiber substrates, such as a Chinese patent application (publication number: CN113340480A) discloses a flexible pressure sensor and its preparation method, which can be applied on the surface of textiles. Numerous pressure sensing units are arranged to realize discrete distance measurement. However, when it is used as a position sensor, it is necessary to arrange a one-dimensional high-density pressure sensor sequence. This technology requires a considerable number of connections and distributed matrix scanning methods to achieve pressure measurement at different positions, and the measured signal is approximately discrete. Function (gear distribution), so it is difficult to have the characteristics of washable, dryable, simple structure, simple circuit, one-dimensional input, etc. This kind of complex device structure and data reading method greatly limit wearable human-computer interaction The input method of the interface.

Contents of the invention

The technical problem to be solved by the present invention is to provide a resistive flexible fabric position sensor with simple structure, stable and reliable, low cost and strong versatility, which can realize distance pressing sensing while taking into account flexibility, wearability, washability, The characteristics of textiles such as drying properties can effectively solve the problem that the existing position sensors cannot be well embedded in clothing textiles.

In order to solve the problems of the technologies described above, the technical scheme adopted in the present invention is as follows:

A resistive flexible fabric position sensor, comprising a first conductive fabric layer, an elastic isolation layer and a second conductive fabric layer arranged sequentially from top to bottom;

The elastic isolation layer is densely covered with a plurality of through holes, and the first conductive fabric layer or the second conductive fabric layer is provided with a contact that matches the through holes, and the contact is connected to the other side. There is a space between the second conductive fabric layer or the first conductive fabric layer; when pressure is applied to the surface of the first conductive fabric layer or the second conductive fabric layer, the contacts penetrate through the The through hole is in contact with the second conductive fabric layer or the first conductive fabric layer on the other side to conduct electricity and output a resistance value corresponding to the position where the force is applied.

As a preferred solution of the present invention, both the first conductive fabric layer and the second conductive fabric layer are provided with conductive wires for outputting electrical signals.

As a preferred solution of the present invention, both the first conductive fabric layer and the second conductive fabric layer are woven from conductive fibers; A conductive pattern, the planar conductive pattern is formed by a fabric structure or digital jacquard weaving.

As a preferred solution of the present invention, the surfaces of the first conductive fabric layer and the second conductive fabric layer are coated with a conductive coating; the first conductive fabric layer and the second conductive fabric layer are woven fabrics , knitted fabrics, woven fabrics or non-woven fabrics.

As a preferred solution of the present invention, the conductive coating is a conductive polymer film.

As a preferred solution 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 the conductive composite material is printed by screen printing or hole plate printing. Planar conductive patterns are formed on the surfaces of the first conductive fabric layer and the second conductive fabric layer by means of spraying, spraying or thermal bonding.

As a preferred solution of the present invention, the elastic isolation layer is an elastic film or fabric material, and both the first conductive fabric layer and the second conductive fabric layer are bonded to the elastic isolation layer by an adhesive.

As a preferred solution of the present invention, the elastic isolation layer is an elastic film, and the material of the elastic film is an elastic polymer material;

The elastic isolation layer is directly attached to the first conductive fabric layer by screen printing, orifice printing or spraying, and the side of the elastic isolation layer away from the first conductive fabric layer is bonded to the first conductive fabric layer through an adhesive. The second conductive fabric layer is bonded;

Alternatively, the elastic isolation layer is directly attached to the second conductive fabric layer by screen printing, orifice printing or spraying, and the side of the elastic isolation layer away from the second conductive fabric layer is passed through an adhesive. bonded to the first conductive fabric layer;

Alternatively, the elastic isolation layer is directly attached to the first conductive fabric layer and the second conductive fabric layer through screen printing, orifice printing or spraying process, and the elasticity attached to the first conductive fabric layer The isolation layer is bonded with the elastic isolation layer attached to the second conductive fabric layer through an adhesive.

As a preferred solution of the present invention, the elastic isolation layer is a fabric material, the fabric material is woven from elastic yarns and non-elastic yarns, and one side of the elastic isolation layer is combined with the first three-dimensional weaving process. A conductive fabric layer is connected, and the other side of the elastic isolation layer is connected with the second conductive fabric layer through a three-dimensional weaving process.

As a preferred solution of the present invention, the elastic isolation layer is an elastic film or fabric material, and the first conductive fabric layer and the second conductive fabric layer are connected to the elastic isolation layer through sewing threads.

Implement a kind of resistive flexible fabric position sensor provided by the present invention, compared with the prior art, its beneficial effect is:

The resistive flexible fabric position sensor of the present invention can be used as position measurement, length and angle measurement equipment, and one-dimensional signal input equipment, etc., has strong versatility, and is superior to traditional photoelectric position sensors that only have the function of position and distance measurement; secondly, Because the one-dimensional vector resistance signal is easy to read, there is no need for complex signal reading methods such as distributed matrix scanning, and only one-dimensional vector signal of resistance value is output. The connection is simple and the data is easy to read, which can save the cost and energy of the data acquisition module. It is superior to the matrix position sensor formed by the combination of flexible pressure sensor matrix; in addition, the first conductive fabric layer, the second conductive fabric layer and the elastic isolation layer are light, soft, comfortable, machine washable, dryable, etc. The unique properties of textiles, its strong bending fatigue resistance, shear fatigue resistance and compression fatigue resistance, can be well embedded in clothing textiles, and accurately measure the position information related to the human body, which is superior to traditional hardware High-quality optoelectronic or silicon-based electronic components.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings of the embodiments will be briefly introduced below.

Fig. 1 is a schematic structural view of a resistive flexible fabric position sensor provided by an embodiment of the present invention;

Figure 2 is an exploded view of designing the first planar conductive pattern on the resistive flexible fabric position sensor;

Figure 3 is an exploded view of designing a second planar conductive pattern on a resistive flexible fabric position sensor;

Fig. 4 is an exploded view of designing a third planar conductive pattern on a resistive flexible fabric position sensor;

Fig. 5 is an exploded view of designing a fourth planar conductive pattern on a resistive flexible fabric position sensor;

Fig. 6 is the theoretical relationship curve and the actual measured curve of the output resistance of the resistive flexible position sensor and the measured length.

Marked in the figure:

The first conductive fabric layer 1 ; the elastic isolation layer 2 ; the second conductive fabric layer 3 ; through holes 4 ; contacts 5 ; conductive wires 6 ;

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In describing the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom" etc. indicate an orientation or position The relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore It should not be construed as a limitation of the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish information of the same type from each other. For example, "first" information may also be referred to as "second" information without departing from the scope of the present invention, and similarly, "second" information may also be referred to as "first" information.

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 arranged from top to bottom.

The elastic isolation layer 2 is densely covered with a plurality of through holes 4, and the first conductive fabric layer 1 or the second conductive fabric layer 3 is provided with a contact 5 that cooperates with the through holes 4, and the contact There is a distance between 5 and the second conductive fabric layer 3 or the first conductive fabric layer 1 on the other side; when the surface of the first conductive fabric layer 1 or the second conductive fabric layer 3 is applied When the pressure is applied, the contact 5 contacts the second conductive fabric layer 3 or the first conductive fabric layer 1 on the other side through the through hole 4 to conduct electricity and output the resistance value corresponding to the position where the force is applied. . Wherein, both the first conductive fabric layer 1 and the second conductive fabric layer 3 are provided with conductive wires 6 for outputting electrical signals. It should be noted that the conductive thread 6 can be arranged outside the conductive fabric layer, that is, a separate conductive thread; it can also be arranged on the conductive fabric layer, that is, the conductive fabric layer itself plays the role of a conductive thread, and directly outputs electrical signals. The conductive fabric layer is connected to the conductive thread 6 by means of welding, bonding, sewing, hot pressing, embroidery or weaving. The connection is simple and does not require complicated wiring. When using the resistive flexible fabric position sensor of the present invention, the first conductive fabric layer 1 and the second conductive fabric layer 3 are respectively connected to the back-end circuit through conductive wires 6 . When pressure is applied to the surface of the first conductive fabric layer 1 or the second conductive fabric layer 3, the contact 5 contacts the second conductive fabric layer 3 or the first conductive fabric layer 1 on the other side through the through hole 4 to conduct electricity, At this time, the first conductive fabric layer 1, the second conductive fabric layer 3, the conductive wire 6 and the back-end circuit form a loop. Thus, pressure is applied to different positions of the first conductive fabric layer 1 or the second conductive fabric layer 3, and by measuring the resistance value at the corresponding position, the linear functional relationship between the output resistance and the first conductive fabric layer 1 and the output resistance Linear function relationship with the second conductive fabric layer 3. By measuring the corresponding resistance value and substituting it into the relevant function, the position information (such as length value, angle value, etc.) Mattresses, smart clothing and other wearable smart textiles related to textiles provide functions such as position measurement, angle measurement and signal input, and have strong versatility. For example, when the resistive flexible fabric position sensor of the present invention is integrated into the position of the upper arm or waist of the garment, the dimension or waist circumference of the upper arm can be measured anytime and anywhere; when the resistive flexible fabric position sensor of the present invention is integrated into the forearm of the garment position, it can be used as an adjustable resistor to dynamically adjust the state of the wearable device (such as adjusting the volume of the earphone or the brightness of the light-emitting clothing, etc.).

It can be seen that the resistive flexible fabric position sensor of the present invention can be used as position measurement, length and angle measurement equipment, and one-dimensional signal input equipment, etc., and has strong versatility, and is superior to traditional photoelectric position sensors that only have the function of position and distance measurement; Secondly, because the one-dimensional vector resistance signal is easy to read, there is no need for complex signal reading means such as distributed matrix scanning, and only one-dimensional vector signal of resistance value is output. The connection is simple and the data is easy to read, which can save the cost of the data acquisition module and energy consumption, which is superior to the matrix position sensor formed by the combination of flexible pressure sensor matrix; in addition, the first conductive fabric layer 1, the second conductive fabric layer 3 and the elastic isolation layer 2 are light, soft, comfortable, machine washable , can be dried and other unique properties of textiles, its bending fatigue resistance, shear fatigue resistance and compression fatigue resistance are strong, it can be well embedded in clothing textiles, and accurately measure the position information related to the human body. Superior to traditional hard photoelectric or silicon-based electronic components.

It should be noted that, in some embodiments, the contact 5 is a protruding structure, and when pressure is applied to the surface of the first conductive fabric layer 1 or the second conductive fabric layer 3, the contact 5 can extend into the through hole 4 Inside, that is, without applying excessive pressure, the first conductive fabric layer 1 and the second conductive fabric layer 3 can conduct electricity well in contact.

Exemplarily, the first conductive fabric layer 1 and the second conductive fabric layer 3 are both woven from conductive fibers. Both the first conductive fabric layer 1 and the second conductive fabric layer 3 are provided with a planar conductive pattern 7, and the planar conductive pattern 7 is formed by fabric structure or digital jacquard weaving. Among them, the conductive fibers are metal-plated fibers (such as silver-plated fibers, copper-plated fibers or gold-plated fibers, etc.), fibers containing metal components (such as stainless steel fibers, etc.), and conductive composite materials (such as polyamide/graphene, polyimide, etc.) Amine/carbon nanotubes or combinations of various chemical fibers and conductive particles, etc.) to prepare conductive fibers or carbon fiber filaments, etc. The planar conductive pattern 7 is in any shape, such as straight lines, waves, curves, triangles, rectangles, squares or artistic patterns.

Exemplarily, the surfaces of the first conductive fabric layer 1 and the second conductive fabric layer 3 are both coated with a conductive coating. The first conductive fabric layer 1 and the second conductive fabric layer 3 are woven fabrics, knitted fabrics, braided fabrics or non-woven fabrics, and their components are natural fibers (such as cotton, wool, silk or hemp, etc.), artificial fibers (such as nylon and polyester, etc.) or a blend of natural fibers and man-made fibers, preferably polyester plain weave. Wherein, the conductive coating is a conductive polymer film or a conductive composite material.

When the conductive coating is selected from a conductive composite material, the conductive composite material includes a base material and conductive particles dispersed in the base material, and the base material adopts a polymer material (such as silicone rubber, polyurethane, polyamide, polyimide or polyester, etc.), the conductive particles are carbon fibers, carbon nanotubes, graphite particles, graphene, carbon black or metal powder, etc. The conductive composite material is formed with planar conductive patterns 7 on the surfaces of the first conductive fabric layer 1 and the second conductive fabric layer 3 by means of screen printing, stencil printing, spray coating or thermal bonding. Among them, 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 any shape, such as straight lines, waves, curves, triangles, rectangles, squares or artistic patterns.

Exemplarily, the elastic isolation layer 2 is an elastic film or fabric material, and both the first conductive fabric layer 1 and the second conductive fabric layer 3 are bonded to the elastic isolation layer 2 by an adhesive. When elastic film is used, its material is elastic polymer material (such as silica gel, polyurethane, etc.); when fabric material is used, the type of fabric material is woven fabric, knitted fabric, braided fabric or non-woven fabric, and its material is natural fiber Viscose fibers or artificial fibers, etc., are preferably warp-knitted elastic fabrics processed from polyurethane filaments.

Exemplarily, the elastic isolation layer 2 is an elastic film, and the material of the elastic film is an elastic polymer material (such as silica gel, polyurethane, etc.); the elastic isolation layer 2 is printed by screen printing, orifice printing or spraying The process is directly attached to the first conductive fabric layer 1, and the side of the elastic isolation layer 2 away from the first conductive fabric layer 1 is bonded to the second conductive fabric layer 3 through an adhesive; or, the The elastic isolation layer 2 is directly attached to the second conductive fabric layer 3 by screen printing, orifice printing or spraying, and the side of the elastic isolation layer 2 away from the second conductive fabric layer 3 is glued agent is bonded to the first conductive fabric layer 1; or, the elastic isolation layer 2 is directly attached to the first conductive fabric layer 1 and the second conductive fabric layer 1 by screen printing, orifice printing or spraying. On the fabric layer 3, 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 by an adhesive, that is, not with a separate Layers exist in the form of layers.

It should be noted that the adhesive can be a hot-melt TPU film, silica gel, acrylic, phenolic or epoxy adhesive, preferably a hot-melt polyurethane film.

Exemplarily, the elastic isolation layer 2 is a fabric material, the fabric material is woven from elastic yarns and non-elastic yarns, and one side of the elastic isolation layer 2 is combined with the first three-dimensional weaving process. The conductive fabric layer 1 is connected, and the other side of the elastic isolation layer 2 is connected to the second conductive fabric layer 3 through a three-dimensional weaving process, that is, the surface of the conductive fabric layer is woven and formed at one time without additional bonding and isolation layer.

Exemplarily, the elastic isolation layer 2 is an elastic film or fabric material, and the first conductive fabric layer 1 and the second conductive fabric layer 3 are connected to 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 straight. The resolution and sensitivity of the resistive flexible fabric position sensor can be adjusted by changing the thickness, elastic modulus, number, size or position of the through-hole 4 of the elastic isolation layer 2; or by changing the thickness, size or conductivity of the conductive coating , to suit different use cases.

Taking the application of pressure on the surface of the first conductive fabric layer 1 as an example, the resistive flexible fabric position sensor in the preferred embodiment of the present invention has the following three forms:

(1) Used to detect the length of the force application position:

Referring to Figures 1 to 3, the resistive flexible fabric position sensor of the present invention adopts a three-layer structure, including a first conductive fabric layer 1, an elastic isolation layer 2 and a second conductive fabric layer 3 arranged in sequence from top to bottom.

Wherein, both the first conductive fabric layer 1 and the second conductive fabric layer 3 are provided with conductive wires 6 for outputting electrical signals. The first conductive fabric layer 1 and the second conductive fabric layer 3 are all preferably polyester plain woven fabrics, and the surfaces of the first conductive fabric layer 1 and the second conductive fabric layer 3 are all coated with a conductive coating, and the conductive coating is preferably Graphene Silicone Composite. The conductive coating forms a straight line planar conductive pattern 7 on the surface of the first conductive fabric layer 1 by screen printing process, and forms two or more parallel straight line planar conductive patterns 7 on the surface of the second conductive fabric layer 3 . The first conductive fabric layer 1 and the second conductive fabric layer 3 are all bonded with the elastic isolation layer 2 by an adhesive, and the elastic isolation layer 2 is preferably a warp-knitted elastic knitted fabric woven from polyurethane filaments. The agent is preferably a hot melt polyurethane film.

The elastic isolation layer 2 is densely covered with a plurality of through holes 4, and the first conductive fabric layer 1 or the second conductive fabric layer 3 is provided with a contact 5 that cooperates with the through holes 4, and the contact There is a distance between 5 and the second conductive fabric layer 3 or the first conductive fabric layer 1 on the other side; when in use, the first conductive fabric layer 1 and the second conductive fabric layer 3 pass through the conductive thread 6 respectively Connect the back-end circuit. When pressure is applied to the surface of the first conductive fabric layer 1, the contact 5 contacts the second conductive fabric layer 3 on the other side through the through hole 4 to conduct electricity and outputs the resistance value corresponding to the position where the force is applied. A conductive fabric layer 1, a second conductive fabric layer 3, a conductive thread 6 and a back-end circuit form a loop. When pressure is applied at different positions on the surface of the first conductive fabric layer 1 , the output resistance of the sensor changes with the position where the pressure is applied, and the output resistance has a linear relationship with the position where the force is applied. By measuring the magnitude of the resistance value, the length of the position where the force is applied can be detected. The theoretical relation curve and actual measured curve of the output resistance of a group of samples and the measured length are given in Fig. 6 .

(2) The angle used to detect the position:

Referring to Fig. 1 and Fig. 4, the resistive flexible fabric position sensor of the present invention adopts a three-layer structure, including a first conductive fabric layer 1, an elastic isolation layer 2 and a second conductive fabric layer 3 arranged in sequence from top to bottom.

Wherein, both the first conductive fabric layer 1 and the second conductive fabric layer 3 are provided with conductive wires 6 for outputting electrical signals. The first conductive fabric layer 1 is preferably a polyester plain weave, and the surface of the first conductive fabric layer 1 is coated with a conductive coating, and the conductive coating is preferably a graphene silica gel composite material or polypyrrole, polyacetylene, poly(3,4 -ethylenedioxythiophene)-polystyrenesulfonic acid and other intrinsically conductive polymer materials, the conductive coating forms 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 The fabric layer 3 is preferably a polyester woven conductive fabric woven from silver-plated fibers. The first conductive fabric layer 1 and the second conductive fabric layer 3 are all bonded with the elastic isolation layer 2 by an adhesive, and the elastic isolation layer 2 is preferably a warp-knitted elastic knitted fabric woven from polyurethane filaments. The agent is preferably a hot melt polyurethane film.

The elastic isolation layer 2 is densely covered with a plurality of through holes 4, and the first conductive fabric layer 1 or the second conductive fabric layer 3 is provided with a contact 5 that cooperates with the through holes 4, and the contact There is a distance between 5 and the second conductive fabric layer 3 or the first conductive fabric layer 1 on the other side; when in use, the first conductive fabric layer 1 and the second conductive fabric layer 3 pass through the conductive thread 6 respectively Connect the back-end circuit. When pressure is applied to the surface of the first conductive fabric layer 1, the contact 5 contacts the second conductive fabric layer 3 on the other side through the through hole 4 to conduct electricity and outputs the resistance value corresponding to the position where the force is applied. A conductive fabric layer 1, a second conductive fabric layer 3, a conductive thread 6 and a back-end circuit form a loop. When pressure is applied at different positions on the surface of the first conductive fabric layer 1 , the output resistance of the sensor changes with the position where the pressure is applied, and the output resistance has a linear relationship with the position where the force is applied. By measuring the magnitude of the resistance value, the angle of the position where the force is applied can be detected.

(3) Azimuth information for detecting the position of force application:

Referring to Fig. 1 and Fig. 5, the resistive flexible fabric position sensor of the present invention adopts a three-layer structure, including a first conductive fabric layer 1, an elastic isolation layer 2 and a second conductive fabric layer 3 arranged in sequence from top to bottom.

Wherein, both the first conductive fabric layer 1 and the second conductive fabric layer 3 are provided with conductive wires 6 for outputting electrical signals. The first conductive fabric layer 1 is preferably a conductive fabric layer that utilizes a jacquard loom to jointly weave nylon conductive yarn and cotton-polyester blended yarn with an S-shaped meandering plane conductive pattern, and the second conductive fabric layer 3 is preferably woven by copper-plated nickel fibers Made of polyester woven conductive fabric. The first conductive fabric layer 1 and the second conductive fabric layer 3 are all bonded with the elastic isolation layer 2 by an adhesive, and the elastic isolation layer 2 is preferably a warp-knitted elastic knitted fabric woven from polyurethane filaments. The agent is preferably a styrenic block copolymer type thermoplastic elastomer.

The elastic isolation layer 2 is densely covered with a plurality of through holes 4, and the first conductive fabric layer 1 or the second conductive fabric layer 3 is provided with a contact 5 that cooperates with the through holes 4, and the contact There is a distance between 5 and the second conductive fabric layer 3 or the first conductive fabric layer 1 on the other side; when in use, the first conductive fabric layer 1 and the second conductive fabric layer 3 pass through the conductive thread 6 respectively Connect the back-end circuit. When pressure is applied to the surface of the first conductive fabric layer 1, the contact 5 contacts the second conductive fabric layer 3 on the other side through the through hole 4 to conduct electricity and outputs the resistance value corresponding to the position where the force is applied. A conductive fabric layer 1, a second conductive fabric layer 3, a conductive thread 6 and a back-end circuit form a loop. When pressure is applied at different positions on the surface of the first conductive fabric layer 1 , the output resistance of the sensor changes with the position where the pressure is applied, and the output resistance has a linear relationship with the position where the force is applied. By measuring the magnitude of the resistance value, the orientation information (such as length value, angle, etc.) of the position where the force is applied can be detected.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral Ground connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and replacements can also be made, these improvements and replacements It 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.

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