Fibrous Tensile Sensor and Method for Manufacturing the Same

Abstract

To provide a fiber-based tension sensor that is applied to smart clothes through a conductive fiber in which resistance is reduced and a current flows only when tension is applied through a strain sensor-cum-wire having a Negative gauge factor (N-GF), thereby transmitting a biosignal.SOLUTION: The fiber-based tension sensor includes: at least one first electrically conductive line including a first flexible part having electrical conductivity; a second flexible part woven to partially come into contact with the first electrically conductive line and having electrical conductivity; and at least one second electrically conductive line implemented to electrically connected to the first flexible part having electrical conductivity in a stretched state.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a fiber-shaped tensile sensor and a method for manufacturing the same, and more particularly, to a fiber-shaped tensile sensor that senses a tensile state and is energized, and a method for manufacturing the same.

Background Art

[0002] The content described in this part only provides background information for the present embodiment and does not constitute the prior art.

[0003] A monitoring system capable of collecting biological data in daily life is typically a wearable device that adheres to or is worn on the body in order to check and collect health indicators such as pulse, blood pressure, body temperature, and electrocardiogram generated by the human body at any time. Such wearable devices must measure various signals inside the body while minimizing discomfort during wearing. However, most commercially available mass-market devices are in the form of accessories such as smartwatches or smart bands, and due to the limitations of the materials constituting the electronic elements, there is a problem that they are limited to a wrist-type in a hard accessory form.

[0004] In addition, a wearable device having high stretchability and applicable to various parts of the user's body may be embodied in smart clothing or the like. By attaching various sensors and semiconductor elements to advanced fibers / materials, not only the biological signals of the wearer but also various monitoring systems such as movement, posture, and internal human body stimuli can be embodied. However, there is a problem that a low-power technology for operating constant monitoring while minimizing power consumption is required.

Summary of the Invention

Problems to be Solved by the Invention

[0005] An embodiment of the present invention is applied to smart clothing via a conductive fiber that has a low resistance only when tensioned through a strain sensor and wiring having a Negative gauge-factor (N-GF), and the main object of the invention is to transmit a biological signal.

[0006] Other objects not explicitly stated in the present invention may be additionally considered within the scope that can be easily inferred from the following detailed description and its effects.

Means for Solving the Problems

[0007] According to one aspect of the present embodiment, the present invention proposes a fiber-shaped tensile sensor including at least one first electrically conductive line including a first flexible portion having electrical conductivity, and at least one second electrically conductive line woven so as to partially contact the first electrically conductive line and including a second flexible portion having electrical conductivity, and being embodied so as to be energized with the first flexible portion having electrical conductivity in a tensioned state.

[0008] Preferably, in the fiber-shaped tensile sensor, the first electrically conductive line and the second electrically conductive line are woven in a twisted form with each other, and a mutual resistance is formed in which a first node connected to the first electrically conductive line and a second node connected to the second electrically conductive line form a resistance below a preset resistance due to a tensile state.

[0009] Preferably, in the fiber-shaped tensile sensor, an insulator is formed inside the first flexible portion or inside the second flexible portion.

[0010] Preferably, in the fiber-shaped tensile sensor, the degree of change in resistance is adjusted by adjusting the number or degree of twists of the at least one first electrically conductive line and the at least one second electrically conductive line with each other.

[0011] Preferably, in the first electrically conductive line or the second electrically conductive line, a conductive part having the electrical conductivity is formed inside the first flexible part and the second flexible part by vapor deposition of metal nanoparticles, and the insulator is formed by vapor deposition of an insulator thin film on the surface of the conductive part, and the insulator thin film is cured by selective irradiation or selective heat treatment of ultraviolet rays or a laser.

[0012] Preferably, the first flexible part and the second flexible part include at least one of polyurethane, SBS (styrene-butadiene-styrene), SBR (styrene butadiene rubber), and PDMS (polydimethylsiloxane) made of a polymer material, and the conductive part includes at least one of a metal substance embodied by nanoparticles, a conductive organic substance, and a nanomaterial.

[0013] Preferably, the insulator includes at least one of an organic substance forming insulator characteristics such as SU-8, Polyimide, PVA, PMMA, and CYTOP, or an oxide such as SiOx and HfOx.

[0014] Preferably, the insulator is characterized in that the degree of crack induction by tension is adjusted through modulus adjustment, thickness adjustment, or hardness adjustment by curing.

[0015] Preferably, the fiber-shaped tensile sensor is embodied to be applied to a stretchable device, and the stretchable device is characterized in that the fiber-shaped tensile sensor is applied at a position where it can be stretched in the longitudinal direction.

[0016] According to another embodiment of the present invention, the present invention includes at least one first electrically conductive line including a first flexible portion having electrical conductivity, and a second flexible portion that is woven so as to partially contact the first electrically conductive line and has electrical conductivity. A fiber-shaped tensile sensor including at least one second electrically conductive line embodied to be energized with the first flexible portion having electrical conductivity in a stretched state, a stretchable device to which the fiber-shaped tensile sensor is applied and embodied to be stretchable by movement, and a monitoring device that receives the current generated during the tensioning, either wired or wirelessly, and monitors the state of the stretchable device. A monitoring system is proposed.

[0017] Preferably, the stretchable device is embodied such that the fiber-shaped tensile sensor is applied at a position where it can be stretched in the longitudinal direction, and the first electrically conductive line and the second electrically conductive line are energized during the stretching. When the monitoring device is energized by the stretching, it predicts the form of the stretchable device and provides real-time feedback.

[0018] According to another embodiment of the present invention, in a manufacturing method for manufacturing a fiber-shaped tensile sensor, a step of depositing metal nanoparticles inside a flexible portion including stretchability to form a conductive portion having electrical conductivity, and a step of weaving so as to partially contact each other such that at least two of the electrically conductive lines are energized when pulled. A manufacturing method is proposed.

[0019] Preferably, the method further includes a step of forming an insulator by depositing an insulator thin film on the surface of the conductive portion, and the step of forming the insulator is characterized by curing the insulator by selective irradiation or selective heat treatment of ultraviolet rays or a laser to form the insulator.

Effects of the Invention

[0020] As described above, according to the embodiment of the present invention, the present invention has high stretchability such that it can be worn on the body of the wearer, minimizes power consumption, and has the effect of enabling constant monitoring.

[0021] Even for effects not explicitly mentioned here, the effects described in the following specification expected by the technical features of the present invention and their provisional effects are treated in the same manner as described in the specification of the present invention.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0023] Hereinafter, when explaining the present invention, if it is determined that a matter that is obvious to those skilled in the art regarding a related known function may unnecessarily obscure the gist of the present invention, the detailed explanation thereof will be omitted, and some embodiments of the present invention will be described in detail through exemplary drawings. However, the present invention may be embodied in various different forms and is not limited to the embodiments described. Also, in order to clearly explain the present invention, parts not related to the explanation are omitted, and the same reference numerals in the drawings indicate the same members.

[0024] The term "and / or" includes any combination of a plurality of related listed items or any of the plurality of related listed items.

[0025] When a component is referred to as being "connected to" or "attached to" another component, it should be understood that it may be directly connected to or attached to the other component, but there may also be other components in between.

[0026] The suffixes "module" and "section" for components used in the following description are given or mixed only for the ease of preparing the specification and do not have meanings or roles that are distinguished from each other by themselves.

[0027] Terms such as first and second may be used when explaining various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

[0028] The present invention relates to a fiber-shaped tensile sensor and a method for manufacturing the same.

[0029] Digital healthcare is an industry that utilizes information and communication technologies to provide advanced patient-tailored medical services, health management products, and services for promoting health. As the target population that can receive the greatest support from this, patients with chronic diseases (such as hypertension, diabetes, chronic respiratory diseases, chronic lumbar disc herniation, etc.) who must constantly manage their own health conditions are mentioned. The most important technology for them is the technology for monitoring systems that can collect biological data in daily life. Wearable devices that adhere to or are worn on the body are typical for checking and collecting health indicators such as pulse, blood pressure, body temperature, and electrocardiogram generated in the human body at any time.

[0030] Wearable devices must measure various signals in the body while minimizing inconvenience during wearing. However, currently commercially available popular wearable devices are mostly in the form of accessories such as smartwatches or smartbands. Due to the limitations of the materials constituting the electronic elements, there is a problem that they are still limited to wrist-type in the form of hard accessories. Therefore, in order to overcome this, as a representative of next-generation wearable devices that can be applied to various parts of our body while having high stretchability, "smart clothing" is highly expected. By attaching various sensors and semiconductor elements to advanced fibers / materials, it is possible to implement various monitoring systems not only for the wearer's biological signals but also for movements, postures, internal human stimuli, etc., and its usability is more excellent.

[0031] However, the development of the monitoring system based on the above-mentioned smart clothing has a technical obstacle that it requires low-power technologies for operating constant monitoring while minimizing power consumption. Although various low-power technologies are being studied to overcome this, the focus is only on the development of battery technologies that are ultra-small but have a large capacity rather than the development of low-power sensors and semiconductor technologies.

[0032] Therefore, in order to embody an ultra-low power health monitoring system applicable to smart clothing, the present invention may be embodied with a strain sensor and wiring having a Negative gauge-factor (N-GF) that overcomes the physical limitations of conventional elements.

[0033] In general, under a predetermined strain rate, conductive fibers have a positive gauge-factor (P-GF) in which electrical resistance is increased by cracks. However, if the fiber-shaped tensile sensor 1 of the present invention has an N-GF and a conductive fiber that can have a low resistance and allow current to flow only during tension is fabricated, a switchable monitoring system that can operate only when an organ swells (e.g., bladder distension, heart relaxation) or when there is a problem with the body's function such as being pulled when inserted into the body, or a low-power system that operates only when pulled and transmits a biological signal can be embodied.

[0034] In addition, display technologies that bring about changes in form-factor have now become common from one-stage curved, bendable fixed-type flexible displays to two-stage rollable, foldable single-axis variable-type flexible displays. As a third-stage next-generation form-factor innovation display, a stretchable display called a freeform display is emerging. Among them, a typical stretchable display that can freely stretch and contract is a fiber-based clothing display. This display is expected to create a new concept market in which clothing and display are integrated through the development of the application field of electronic fibers, beyond attaching a flexible display to clothing. However, unlike conventional flexible displays, such a clothing display is a stretchable display, so there is a problem that the resolution / brightness changes and the image is distorted due to an increase in the interval between pixels of the same number of pixels during tension, and a solution for this is an urgent situation.

[0035] A stretchable clothing display is to be realized that can prevent image distortion due to changes in resolution and brightness even when the display is stretched. This is achieved by a fiber-shaped tensile sensor containing a substance whose resistance characteristics change depending on the tensile force applied to the display, enabling a light-emitting element (Hidden pixel) that was not driven before the display was stretched to be light-emission controlled after the display is stretched. Conventional wiring with N-GF cannot have a large N-GF or resistance change rate that changes from an insulator to a conductor, and there are no cases applied to fibers.

[0036] Therefore, in order to solve the above-mentioned problems, the fiber-shaped tensile sensor 1 may be embodied with a conductive fiber having a Negative gauge-factor (N-GF), whose resistance becomes low and current can flow only during tension.

[0037] FIG. 1 is a drawing showing the manufacture of a single electrically conductive line according to an embodiment of the present invention.

[0038] The fiber-shaped tensile sensor 1 includes a first electrically conductive line 10a and a second electrically conductive line 10b.

[0039] Referring to FIG. 1, the electrically conductive line 10 includes a flexible part 100, a conductive part 200, and an insulator 300. The electrically conductive line 10 may omit some of the various components illustrated in FIG. 1 or additionally include other components.

[0040] The electrically conductive line 10 includes a flexible part 100 having electrical conductivity.

[0041] The fiber-shaped tensile sensor 1 includes at least one first electrically conductive line 10a including a first flexible part having electrical conductivity, and is woven so as to partially contact the first electrically conductive line 10a, and includes a second flexible part having electrical conductivity. In a stretched state, the fiber-shaped tensile sensor 1 includes at least one second electrically conductive line 10b configured to be energized with the first flexible part having electrical conductivity.

[0042] The first electrically conductive line 10a or the second electrically conductive line 10b may further include an insulator 300 formed on the surface of the flexible part 100 having electrical conductivity.

[0043] In the fiber-shaped tensile sensor 1, the first electrically conductive line 10a and the second electrically conductive line 10b are woven in a twisted form with each other, and a mutual resistance is formed in which a first node connected to the first electrically conductive line 10a and a second node connected to the second electrically conductive line 10b form a resistance below a preset resistance due to a tensile state.

[0044] The fiber-shaped tensile sensor 1 can be embodied such that the degree of resistance change is adjusted by adjusting the number or degree of twists of at least one first electrically conductive line 10a and at least one second electrically conductive line 10b twisted with each other.

[0045] In the first electrically conductive line 10a or the second electrically conductive line 10b, a conductive part 200 having electrical conductivity can be formed on the surface of the flexible part 100 by vapor deposition of metal nanoparticles, and an insulator 300 can be formed on the surface of the conductive part by vapor deposition of an insulator thin film. Here, the insulator thin film can be cured by selective irradiation or selective heat treatment of ultraviolet rays or a laser. For example, it may be embodied so as to be formed by selective irradiation of ultraviolet curing (UV-curing).

[0046] The flexible part 100 may include at least one of polyurethane, SBS (styrene-butadiene-styrene), SBR (styrene butadiene rubber), and PDMS (polydimethylsiloxane) made of a polymer material.

[0047] The conductive part 200 may include at least one of a metal substance embodied by nanoparticles, a conductive organic substance, and a nanomaterial.

[0048] The insulator 300 may include at least one of an organic substance that forms insulator characteristics such as SU-8, Polyimide, PVA, PMMA, CYTOP, or an oxide such as SiOx, HfOx.

[0049] The insulator 300 can have the degree of crack induction by tension adjusted by adjusting the modulus, thickness, or hardness by curing.

[0050] The fiber-shaped tensile sensor 1 may be embodied to be applied to a stretchable device. Here, the stretchable device can be applied at a position where the fiber-shaped tensile sensor 1 can be pulled in the length direction.

[0051] Therefore, after depositing a thin film having the above insulating characteristics on two conductive fibers, the fiber-shaped tensile sensor 1 can form a wiring electrode having an N-GF in which current can flow only during tension by twisting the two elements and finely adjusting the density and size of cracks by tension.

[0052] FIG. 2 is a drawing showing an analysis after insulating film deposition and selective UV irradiation according to an embodiment of the present invention.

[0053] Referring to FIG. 2, the fiber-shaped tensile sensor 1 can be formed by depositing silver nanoparticles (AgNP), which are a conductive substance, on the surface of polyurethane (PU) fibers that represent stretchable fibers, and then depositing an SU-8 insulating film thereon and irradiating it with selective UV light.

[0054] Referring to FIG. 2(a), the fiber-shaped tensile sensor 1 may further perform selective curing by UV irradiation of the insulator.

[0055] FIG. 2(b) is a drawing showing the crack formation pattern during tension with or without UV irradiation according to an embodiment of the present invention, FIG. 2(c) is a graph showing the measurement result of deformation stress by a force sensor according to an embodiment of the present invention, and FIG. 2(d) is a drawing showing a cross section of a fiber-shaped tensile sensor with an SU-8 insulating film deposited on its surface according to an embodiment of the present invention.

[0056] FIG. 3 is a drawing showing a fiber-shaped tensile sensor formed by twisting two electrically conductive lines according to an embodiment of the present invention.

[0057] The fiber-shaped tensile sensor 1 can be embodied by twisting two electrically conductive lines so as to have N-GF and to make cracks contact each other during tension. Specifically, the first electrically conductive line 10a and the second electrically conductive line 10b can be embodied to contact each other when stretched and to have their resistances connected to each other.

[0058] Referring to FIG. 3, the sensing result of the fiber-shaped tensile sensor 1 fabricated by twisting SU-8 / AgNP coated PU fiber can be confirmed.

[0059] Figure (b) of FIG. 3 is a drawing showing the resistance change of an element according to the tensile speed (20% tensile change repeated) according to an embodiment of the present invention, and FIG. 3 (c) is a drawing showing the result of measuring 20% tensile repetition a predetermined number of times according to an embodiment of the present invention.

[0060] FIG. 4 is a drawing showing the resistance change according to the number of twists of two electrically conductive lines according to an embodiment of the present invention.

[0061] Referring to FIG. 4, the fiber-shaped tensile sensor 1 may be embodied so that the resistance change sensitivity can be adjusted by adjusting the number of twists when weaving the electrically conductive line.

[0062] FIG. 4 (a) is a drawing showing 10%, 20% and 30% tensile when twisted once according to an embodiment of the present invention, and FIG. 4 (b) is a drawing showing 10%, 20% and 30% tensile when twisted twice according to an embodiment of the present invention. FIG. 4 (c) is a drawing showing 10%, 20% and 30% tensile when twisted three times according to an embodiment of the present invention.

[0063] Referring to FIG. 4, it can be confirmed that the fiber-shaped tensile sensor 1 forms a low sensitivity when twisted once, and it can be confirmed that a high sensitivity is formed when twisted three times.

[0064] FIG. 5 is a drawing showing the number of hidden pixels according to the degree of tension of two electrically conductive lines according to an embodiment of the present invention.

[0065] Referring to FIG. 5 (a), when the fiber-shaped tensile sensor 1 is tensioned by 10%, general pixels and hidden pixels are confirmed at 6:2.

[0066] Referring to FIG. 5 (b), when the fiber-shaped tensile sensor 1 is tensioned by 20%, general pixels and hidden pixels are confirmed at 7:1.

[0067] Referring to Fig. 5(c), when the fiber-shaped tensile sensor 1 is stretched by 30%, the general pixels and the hidden pixels are confirmed to be 8:0.

[0068] Accordingly, the fiber-shaped tensile sensor 1 can adjust the number of hidden pixels opened according to the degree of stretching.

[0069] Fig. 6 is a drawing showing the change in resistance according to the degree of stretching by adjusting the number of twists (twist) of two electrically conductive lines according to an embodiment of the present invention.

[0070] Referring to Fig. 6, it is possible to confirm the result of the resistance change of the element according to the degree of stretching (repeated 5 times each) by adjusting the number of twists of the SU-8 / AgNP coated PU fiber.

[0071] Fig. 7 is a drawing in which a fiber-shaped tensile sensor according to an embodiment of the present invention is applied to an LED array.

[0072] Referring to Fig. 7, it can be confirmed that the reaction in the LED array is diffused in the tensile direction according to the degree to which the fiber-shaped tensile sensor 1 is stretched.

[0073] Figs. 8 to 10 are drawings showing a monitoring system to which a fiber-shaped tensile sensor according to an embodiment of the present invention is applied.

[0074] The monitoring system may include a fiber-shaped tensile sensor, a stretchable device, and a monitoring device.

[0075] The fiber-shaped tensile sensor may include at least one first electrically conductive line including a first flexible portion having electrical conductivity, and at least one second electrically conductive line woven so as to partially contact the first electrically conductive line and including a second flexible portion having electrical conductivity and being configured to be energized with the first flexible portion having electrical conductivity in a stretched state.

[0076] The stretchable device is applied with a fiber-shaped tensile sensor and can be embodied to be stretchable by movement.

[0077] The monitoring device can receive the current generated during stretching, either wired or wirelessly, and monitor the state of the stretchable device.

[0078] FIG. 8 is a drawing showing a monitoring system to which a fiber-shaped tensile sensor according to a first embodiment of the present invention is applied.

[0079] According to the first embodiment, the fiber-shaped tensile sensor 1 may be applied to a stretchable clothing display.

[0080] According to an embodiment of the present invention, the stretchable clothing display can apply hidden pixels for resolution compensation when stretched in two axial directions. At this time, the hidden pixels for resolution compensation may be embodied by an LED array and are not necessarily limited thereto.

[0081] The stretchable clothing display may be embodied such that the + electrode always connected and the + electrode connected to the fiber-shaped tensile sensor are arranged to cross each other, and the - electrode always connected and the - electrode connected to the fiber-shaped tensile sensor are arranged to cross each other.

[0082] X represents hidden pixels in the x-axis direction that turn on when the x-axis is stretched, and y represents hidden pixels in the y-axis direction that turn on when the y-axis is stretched.

[0083] FIG. 9 is a drawing showing a monitoring system to which a fiber-shaped tensile sensor according to a second embodiment of the present invention is applied.

[0084] According to the second embodiment, the fiber-shaped tensile sensor 1 may be applied to a healthcare monitoring system. For example, the fiber-shaped tensile sensor 1 may be applied to a low-power smart mask incorporating a respiration sensing sensor.

[0085] According to one embodiment of the present invention, the fiber-shaped tensile sensor 1 may be applied to the ear loops of the mask, and is not necessarily limited thereto.

[0086] Referring to FIG. 9, a fiber-shaped tensile sensor 1 fabricated on a rubber mask string is inserted into the wiring, and an ultra-low-power monitoring system based on a gas sensor that operates only when the mask is worn and has a standby power of 0 can be realized.

[0087] At this time, the mask in the healthcare monitoring system may be embodied so that the respiration habits and health status of the user can be monitored by the CO2 sensor 2, and the particulate matter concentration can be measured by the particulate matter sensor 3.

[0088] FIG. 10 is a drawing showing a monitoring system to which a fiber-shaped tensile sensor according to the third embodiment of the present invention is applied.

[0089] According to the third embodiment, the fiber-shaped tensile sensor 1 may be applied to a healthcare monitoring system. For example, the fiber-shaped tensile sensor 1 may be applied to real-time low-power posture monitoring smart clothing for posture correction.

[0090] Referring to FIG. 10, a fiber-shaped tensile sensor 1 fabricated on the neck, shoulders, and waist may be inserted so that current flows only in case of a bad posture, and a monitoring system in which a notification is displayed to a smartphone application based on the current value can be realized. At this time, when the posture is correct, no current flows, so there is no consumption of standby power.

[0091] The fiber-shaped tensile sensor 1 may be embodied in a detachable form so as to be matched for each wearer, and is not necessarily limited thereto.

[0092] FIG. 11 is a configuration diagram of a monitoring system according to another embodiment of the present invention.

[0093] Referring to FIG. 11, the monitoring system may include a fiber-shaped tensile sensor 1000, a display unit 2000, a power supply unit (not shown), and a housing (not shown). The monitoring system may omit some of the various components exemplarily shown in FIG. 11 or additionally include other components.

[0094] The fiber-shaped tensile sensor 1000 includes a sensor array 1100 in which the conductive fibers of the present invention are arranged and a first controller 1200. The sensor array 1100 may have a structure in which conductive twist sensor lines in which a first electrical conductive line and a second electrical conductive line are coupled in a twisted form intersect and are arranged. Of course, it may be embodied in various array forms such as a one-dimensional array or a three-dimensional array that is not a two-dimensional intersection array. Electrical signals from each of the conductive twist sensor lines are collected via a first conductive bus line 1110 and a second conductive bus line 1120 and transmitted to the first controller 1200.

[0095] The first controller 1200 analyzes the collected electrical signals to sense changes in voltage, current, or resistance for each position of the sensor array. For example, when a decrease in resistance value is sensed at a node at a certain position, the first controller 1200 can sense that the conductive fiber has been pulled at that position.

[0096] The first controller 1200 can sense changes in resistance for each node included in the sensor array and determine whether contraction / tension has occurred at each node.

[0097] The display unit 2000 includes a light-emitting element array 2100 and a second controller 2200. The light-emitting element array 2100 may be, for example, an LED or an OLED, and there is no particular limitation on the type of the light-emitting element.

[0098] The second controller 2200 transmits a control signal for controlling the state (on / off or brightness) of the light-emitting element to the light-emitting element array 2100 according to the array position of the light-emitting elements or the contraction / tension state of the conductive fibers.

[0099] In the present invention, the first controller 1200 senses the resistance change of each node (the resistance change corresponds to the contraction / tension state of each node) based on the electrical signals acquired for each position of the nodes sensed via the sensor array 1100, and transmits a contraction / tension signal for controlling the light-emitting element according to the resistance change for each node to the second controller 2200. The second controller 2200 receives the contraction / tension signal and transmits a control signal for controlling the light-emitting element to the light-emitting element array 2100 according to a predetermined criterion.

[0100] FIG. 12 is a flowchart showing a method for manufacturing a fiber-shaped tensile sensor according to an embodiment of the present invention. The method for manufacturing a fiber-shaped tensile sensor is executed by the fiber-shaped tensile sensor, and descriptions overlapping with the fiber-shaped tensile sensor in the above-described drawings are omitted.

[0101] The method for manufacturing a fiber-shaped tensile sensor includes a step (S1210) of depositing metal nanoparticles inside a flexible portion including stretchability to form a conductive portion having electrical conductivity, a step (S1220) of forming an insulator by depositing an insulator thin film on the surface of the conductive portion, and a step (S1230) of weaving at least two electrically conductive lines so that they are in partial contact with each other and energized with each other when pulled.

[0102] In the step (S1220) of forming an insulator by depositing an insulator thin film on the surface of the conductive portion, the step of forming the insulator can form the insulator by curing by selective irradiation or selective heat treatment of ultraviolet rays or a laser.

[0103] The step (S1220) of forming an insulator by depositing an insulator thin film on the surface of the conductive part can deposit an insulator inside the flexible part on which the conductive part is deposited to generate an electrically conductive line.

[0104] The step (S1230) of weaving such that at least two electrically conductive lines are in partial contact with each other so as to be energized when pulled can be woven such that the electrically conductive line generated by the step (S1210) and the electrically conductive line generated by the step (S1220) are twisted with each other, or two or more electrically conductive lines generated by the step (S1220) can be woven so as to be twisted with each other.

[0105] FIG. 12 describes sequentially performing each process, but this is merely an illustrative explanation. A person skilled in the art can modify and apply it in various ways by changing the order described in FIG. 12, or executing one or more processes in parallel, or adding other processes, without departing from the essential characteristics of the embodiments of the present invention.

[0106] Therefore, the electrically conductive line 10 of the present invention includes a flexible part 100, a conductive part 200, and an insulator 300.

[0107] The electrically conductive line 10 includes a flexible part 100 embodied by elastic fibers, includes a conductive part 200 indicating conductive fibers composed of metal nanoparticles formed inside the elastic fibers, and includes an insulator 300 indicating elastic fibers including an insulating layer thin film formed on the surface of the conductive fibers. At this time, the surface may be an insulating layer and the inside may be embodied as a conductive layer.

[0108] The fiber-shaped tensile sensor 1 may be embodied as a fiber-shaped sensor that twists two or more of the above-described insulating layer / conductive layer stretchable fibers with each other to form an inter-mutual resistance, or may also be embodied as a fiber-shaped sensor that twists one or more insulating layer / conductive layer stretchable fibers and one or more stretchable fibers composed only of a conductive layer with each other to form an inter-mutual resistance.

[0109] The inter-mutual resistance may form a resistance with a low conductor level only during tension, and form a resistance with a high insulator level when not under tension, and may also have a negative strain gauge value.

[0110] The stretchable fiber uses a fiber made of a polymer material and may include any one selected from the group consisting of polyurethane, SBS (styrene-butadiene-styrene), SBR (styrene butadiene rubber), and PDMS (polydimethylsiloxane), and is not necessarily limited thereto.

[0111] The conductive layer may include various metal substances such as silver nanoparticles, gold nanoparticles, copper nanoparticles, and platinum nanoparticles, conductive organic substances such as PEDOT:PSS, or nanomaterials such as nanowires, and is not necessarily limited thereto.

[0112] The insulating layer may include organic substances having insulating properties such as SU-8, Polyimide, PVA, PMMA, CYTOP, or oxides such as SiOx and HfOx, and is not necessarily limited thereto.

[0113] According to an embodiment of the present invention, the insulating layer may include a thin film that can adjust the degree of crack induction due to tension by adjusting the modulus differently by selective curing such as UV.

[0114] Further, it may include a thin film capable of adjusting the degree of crack induction by tension by adjusting the thickness and hardness of the insulating layer.

[0115] The fibrous tensile sensor 1 can adjust the degree of resistance change according to the number or degree of twisting of the electrically conductive line 10.

[0116] The electrically conductive line 10 can be used not only for fiber and fiber, but also for a combination of a stretchable substrate having an insulating layer / conductive layer and a fiber, and a combination of substrates.

[0117] Further, it may be applied and used in various applications (monitoring devices, wearable displays, etc.) that use the electrically conductive line 10 as part of the wiring.

[0118] The operation according to the present embodiment can be embodied in the form of program instructions executed by various computer means and recorded on a computer-readable medium. A computer-readable medium refers to any medium that participates in providing instruction words to a processor for execution. The computer-readable medium may include program instructions, data files, data structures, or combinations thereof. For example, there may be magnetic media, optical recording media, memories, etc. The computer program may be distributed on a computer system connected by a network and stored and executed in a distributed manner with computer-readable code stored therein. Functional programs, codes, and code segments for embodying the present embodiment should be easily inferred by a programmer in the technical field to which the present embodiment belongs.

[0119] The above description merely exemplifies the technical idea of the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains can make various modifications, changes, and substitutions without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention and the attached drawings are for the purpose of explanation rather than for limiting the technical idea of the present invention, and the scope of the technical idea of the present invention is not limited by such embodiments and the attached drawings. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

Description of Reference Numerals

[0120] 1 ··· Fiber-shaped tensile sensor 10 ··· Electrically conductive line 100 ··· Flexible part 200 ··· Conductive part 300 ··· Insulator

Claims

1. At least one first electrically conductive line including a first flexible portion having electrical conductivity, Woven so as to partially contact the first electrically conductive line, including a second flexible portion having electrical conductivity, and at least one second electrically conductive line embodied to be energized with the first flexible portion having electrical conductivity only in a stretched state, An insulator formed on the surfaces of the first electrically conductive line and the second electrically conductive line forms cracks only during tensioning and is embodied such that current flows, characterized by a fiber-shaped tensile sensor.

2. The fiber-shaped tensile sensor, The first electrically conductive line and the second electrically conductive line are woven in a twisted form with each other, the insulator forms cracks only in a tensile state, and a first node connected to the first electrically conductive line and a second node connected to the second electrically conductive line form an inter-resistance having a resistance below a preset resistance only in a tensile state, the fiber-shaped tensile sensor according to claim 1, characterized by this.

3. The fiber-shaped tensile sensor, The degree of resistance change is adjusted by adjusting the number or degree of twists of the at least one first electrically conductive line and the at least one second electrically conductive line with each other, the fiber-shaped tensile sensor according to claim 1, characterized by this.

4. The first electrically conductive line or the second electrically conductive line, A conductive portion having electrical conductivity formed by depositing metal nanoparticles outside the first flexible portion and the second flexible portion, And an insulator formed by depositing an insulator thin film on the surface of the conductive portion, Having, The insulator thin film is formed by being cured by selective irradiation or selective heat treatment of ultraviolet rays or a laser, the fiber-shaped tensile sensor according to claim 1, characterized by this.

5. The first flexible portion and the second flexible portion, At least one of polyurethane, SBS (styrene-butadiene-styrene), SBR (styrene butadiene rubber), and PDMS (polydimethylsiloxane) made of a polymer material, The fiber-shaped tensile sensor according to claim 4, wherein the conductive part includes at least one of a metallic substance embodied by nanoparticles, a conductive organic substance, and a nanomaterial.

6. The insulator is The fiber-shaped tensile sensor according to claim 1, comprising at least one of an organic substance forming insulator characteristics such as SU-8, Polyimide, PVA, PMMA, Cytop, or an oxide such as SiO x, HfO x.

7. The insulator is The fiber-shaped tensile sensor according to claim 1, wherein the degree of crack induction by tension is adjusted by adjusting the modulus, thickness, or hardness by curing.

8. The fiber-shaped tensile sensor is Embodied to be applied to a stretchable device, The stretchable device is applied to a position where the fiber-shaped tensile sensor can be pulled in the longitudinal direction, The fiber-shaped tensile sensor according to claim 1.

9. At least one first electrically conductive line including a first flexible part having electrical conductivity, woven so as to partially contact the first electrically conductive line, including a second flexible part having electrical conductivity, and in a stretched state, A fiber-shaped tensile sensor including at least one second electrically conductive line embodied to be energized with the first flexible part having electrical conductivity; A stretchable device to which the fiber-shaped tensile sensor is applied and embodied to be stretchable by movement; A monitoring device that receives the current generated during the tension by wire or wirelessly and monitors the state of the stretchable device A monitoring system including.

10. The stretchable device is The fiber-shaped tensile sensor is applied to a position where it can be pulled in the longitudinal direction, and the first electrically conductive line and the second electrically conductive line are embodied to be energized during tension. The monitoring system according to claim 9, wherein the monitoring device predicts the form of the stretchable device and provides real-time feedback when energized by the tension.

11. A manufacturing method for manufacturing a fiber-shaped tensile sensor, Depositing metal nanoparticles inside a flexible part including elasticity to form a conductive part having electrical conductivity; Weaving at least two electrical conductive lines for forming the conductive part inside the flexible part so that they are partially in contact with each other to be energized when pulled; comprising; further comprising the step of forming an insulator on the surface of the conductive part by depositing an insulator thin film; The step of forming the insulator is characterized in that the insulator is formed by curing by selective irradiation or selective heat treatment of ultraviolet rays or a laser.

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