Planar heating sheet integrated with motion sensor and method for manufacturing same

Abstract

Disclosed are a planar heat-generating sheet integrated with a motion sensor and a method for manufacturing the same. According to one embodiment of the present invention, there may be provided a planar heat-generating sheet integrated with a motion sensor, comprising: a heat-generating sheet part including a first fiber, a patterned heat-generating layer formed on one surface of the first fiber and composed of a plurality of carbon nanotubes, and a first electrode formed on the other surface of the first fiber, the first electrode is electrically connected with the pattern heating layer; and a sensor sheet part including a second fiber, a self-assembled monolayer that is formed on one surface of the second fiber and contains a functional group, a carbon nanotube layer that is formed by adsorbing a plurality of carbon nanotubes on the self-assembled monolayer, and a second electrode that is formed by adsorbing a plurality of carbon nanotubes on the self-assembled monolayer. The second electrode is electrically connected with the carbon nanotube layer, and the sensor sheet part is attached to the other surface of the first fiber.

Description

Technical Field

[0001] The invention relates to a planar heating sheet integrated with a motion sensor and a manufacturing method thereof. Background Art

[0002] Currently, the types of convenience devices applied to automobiles are on the rise, and in particular, investments in convenience devices related to automobile seats for passengers including drivers are being most actively developed.

[0003] Conventional automobiles use a heating system using a metal heat wire for heating in winter.

[0004] However, the heating system of the metal heat wire method has the problem of high manufacturing cost, which leads to a decrease in the profit of automobile manufacturers, and there are problems such as burn accidents of passengers and vehicle fire accidents, and there is also a problem of increased A / S costs due to disconnection of the metal heat wire.

[0005] In addition, since heat generation control is not performed in consideration of the activities of passengers, there is a problem of reduced energy efficiency, which is not preferable for battery management of electric vehicles, which are gaining market share recently.

[0006] The technology serving as the background of the present invention is disclosed in Korean Patent Gazette No. 10-1768665 (August 17, 2017, wearable sensor and method for manufacturing the same) and Korean Patent Gazette No. 10-2076767 (February 12, 2020, heating fiber fabric and method for manufacturing heating fiber fabric), etc. Summary of the invention

[0007] Problem that the invention aims to solve

[0008] An embodiment of the present invention provides a planar heating sheet integrated with a motion sensor and a method for manufacturing the same. Compared with the existing metal heating wire method, the planar heating sheet has a heating structure with low power consumption and excellent durability, and can achieve heating control that takes the activities of the passengers into consideration, so it has excellent energy efficiency.

[0009] Means used to solve problems

[0010] According to one embodiment of the present invention, there can be provided a planar heating sheet integrated with a motion sensor, comprising: a heating sheet portion, comprising a first fiber, a patterned heating layer and a first electrode, wherein the patterned heating layer is formed on one side of the first fiber and is composed of a plurality of carbon nanotubes, and the first electrode is electrically connected to the patterned heating layer; and a sensor sheet portion, comprising a second fiber, a self-assembled monolayer, a carbon nanotube layer and a second electrode, wherein the self-assembled monolayer is formed on one side of the second fiber and contains functional groups, the carbon nanotube layer is formed by a plurality of carbon nanotubes adsorbed on the self-assembled monolayer, the second electrode is electrically connected to the carbon nanotube layer, and the sensor sheet portion is adhered to the other side of the first fiber.

[0011] The first fibers may consist of woven fibers.

[0012] The second fibers may consist of knitted fabric fibers.

[0013] The patterned heat-generating layer may be configured as a continuous mesh structure having openings formed on one side of the first fibers, and the openings may be used as ventilation holes in the ventilated seat.

[0014] The sensor sheet may detect a change in resistance of the carbon nanotube layer corresponding to deformation of the second fibers, and the heat generating sheet may control power supplied to the pattern heat generating layer according to a detection result of the sensor sheet.

[0015] According to another embodiment of the present invention, there can be provided a method for manufacturing a planar heating sheet integrated with a motion sensor, which comprises: a step of dispersing a plurality of carbon nanotubes in a dispersion medium to prepare a dispersed solution; a step of forming a patterned heating layer by providing the dispersed solution on one side of a first fiber, and forming a first electrode electrically connected to the patterned heating layer, thereby manufacturing a heating sheet portion; a step of forming a self-assembled monolayer containing functional groups on one side of a second fiber, forming a carbon nanotube layer by providing the dispersed solution on the self-assembled monolayer, and forming a second electrode electrically connected to the carbon nanotube layer, thereby manufacturing a sensor sheet portion; and a step of attaching the sensor sheet portion to the heating sheet portion so that the sensor sheet portion is located on the other side of the first fiber.

[0016] Effects of the Invention

[0017] According to the embodiment of the present invention, compared with the conventional metal heating wire method, it has a heating structure with low power consumption and excellent durability, and can realize heating control taking into account the activities of the passengers, thereby improving energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1FIG. 1 is a diagram of a planar heating sheet integrated with a motion sensor according to an embodiment of the present invention.

[0019] Figure 2 yes Figure 1 A cross-sectional view of the heating sheet portion.

[0020] Figure 3 yes Figure 1 A cross-sectional view of a sensor sheet portion.

[0021] Figure 4 A conceptual diagram for explaining the bonding principle of a self-assembled monolayer.

[0022] Figure 5 The present invention is a flowchart of a method for manufacturing a planar heating sheet integrated with a motion sensor according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0024] Unless explicitly defined with different meanings, the terms used in the embodiments of the present invention may be interpreted as meanings that are generally understood by a person of ordinary skill in the art to which the present invention belongs, and are considered only to illustrate specific embodiments rather than to limit the present invention.

[0025] In this specification, unless otherwise specified, a singular expression includes a plural expression.

[0026] In addition, when it is mentioned that a part “includes” a certain constituent element, it means that the part may also include other constituent elements.

[0027] In addition, when a component is referred to as “on”, it means above or below the component, and does not necessarily mean that it is located on the upper side based on the direction of gravity.

[0028] In addition, when it is mentioned that a certain component is “connected” or “coupled” to another component, this includes not only a case where the component is directly connected or coupled to another component, but also a case where the component is indirectly connected or coupled via another component.

[0029] In addition, in the process of describing a certain component, terms such as "first" and "second" may be used, but such terms are only used to distinguish the component from other components, and the nature, order or sequence of the component are not limited by these terms.

[0030] Figure 1 is a diagram of a planar heating sheet integrated with a motion sensor according to an embodiment of the present invention, Figure 2 yes Figure 1 A cross-sectional view of the heating sheet portion, Figure 3 yes Figure 1 A cross-sectional view of a sensor sheet portion.

[0031] Reference Figures 1 to 3 According to an embodiment of the present invention, a planar heating sheet 10 integrated with a motion sensor may include a heating sheet portion 100 and a sensor sheet portion 200 .

[0032] The heating sheet 100 can perform the heating function by coating the carbon nanotubes on the fiber fabric by inking. Specifically, the heating sheet 100 can perform the planar heating function of the far infrared ray emission mode in a light, thin and soft manner by patterning the electrodes by embroidering conductive yarn on the fiber fabric and forming a protective layer after coating the carbon nanotubes.

[0033] The heat generating sheet 100 may include: a first fiber 110 , a pattern heat generating layer 120 , and a first electrode 130 .

[0034] The first fiber 110 may be composed of a woven fabric fiber that is stretchable and excellent in durability.

[0035] The patterned heating layer 120 may be formed on one side of the first fiber 110 and may be composed of a plurality of carbon nanotubes, wherein the carbon nanotube (CNT) may be a nanomaterial in the form of a tube composed of a plate-like graphite sheet formed by six carbon atoms bonded in a hexagonal shape, and the diameter thereof may be approximately several nanometers to several hundred nanometers.

[0036] The patterned heat generating layer 120 may be configured as a continuous mesh structure in which openings 120 a are formed on one surface of the first fiber 110 .

[0037] The opening 120 a may refer to a portion where one surface of the first fiber 110 is exposed to the outside because the patterned heat generating layer 120 is not formed.

[0038] Therefore, the opening 120a can be used as a ventilated seat of a car. That is, if a heat-generating layer is formed on the entire area of ​​the first fiber 110, the air supplied by the blower or the like is blocked by the heat-generating layer at the lower side of the planar heat-generating sheet, and thus cannot reach the passenger sitting on the planar heat-generating sheet. However, by using the opening 120a as a ventilated seat, smooth ventilation can be achieved.

[0039] The first electrode 130 may electrically connect the patterned heat generating layer 120 and an external power source (not shown).

[0040] Current may flow to the patterned heat-generating layer 120 through the first electrode 130 , so that the patterned heat-generating layer 120 performs electrical heating (or resistance heating).

[0041] For example, the sensor sheet 200 may be attached to the heat generating sheet 100 via a hot melt layer.

[0042] For example, the sensor sheet 200 may be attached to the other surface of the first fiber 110 and arranged to overlap with the patterned heat generating layer 120 in the vertical direction.

[0043] Therefore, the sensor sheet 200 can perform precise heating control by analyzing the posture, activity, muscle fatigue, body temperature, breathing, and electrocardiogram of the occupant sitting on the patterned heating layer 120 .

[0044] The sensor sheet 200 may include a second fiber 210 , a self-assembled monolayer 220 , a carbon nanotube layer 230 , and a second electrode 240 , and may further include a protective layer 250 .

[0045] In order to detect the movement of the occupant, the second fiber 210 may be formed of a knitted fabric fiber having excellent elasticity.

[0046] A self-assembled monolayer 220 and a carbon nanotube layer 230 may be formed on one side of the second fiber 210 , and the other side of the second fiber 210 may be attached to the other side of the first fiber 110 .

[0047] The self-assembled monolayer 220 may be formed on one side of the second fiber 210 and include a functional group.

[0048] As described above, if the self-assembled monolayer 220 is formed on one side of the second fiber 210 and the second fiber 210 is surface-treated, the bonding force between the second fiber 210 and the carbon nanotube layer 230 can be increased.

[0049] The carbon nanotube layer 230 may be formed by adsorbing a plurality of carbon nanotubes on the self-assembled monolayer 220 .

[0050] The resistance value of the carbon nanotube layer 230 may change in correspondence with the change in the surface area of ​​the carbon nanotube layer 230 or the change in the number of contact points of the plurality of carbon nanotubes, and the sensor sheet 200 may analyze the posture, activity, muscle fatigue, body temperature, respiration, electrocardiogram, etc. of the occupant by detecting the change in the resistance value of the carbon nanotube layer 230 corresponding to the deformation of the second fiber 210. As described above, the detection value detected by the sensor sheet 200 and the information based on the analysis thereof may be used to control the power supplied to the pattern heating layer 120 of the heating sheet 100.

[0051] The second electrode 240 can electrically connect the carbon nanotube layer 230 and a resistance measuring device (not shown).

[0052] The protection layer 250 may be coated on the carbon nanotube layer 230 , and may improve the problem that the carbon nanotube layer 230 may be peeled off due to excessive or rapid deformation of the second fibers 210 , and may also relieve stress of the carbon nanotube layer 230 .

[0053] The protective layer 250 may be made of resin, but is not necessarily limited thereto, as long as it is a flexible material having excellent elasticity and capable of expanding and contracting according to the deformation of the second fibers 210 .

[0054] Figure 4 A conceptual diagram for explaining the bonding principle of a self-assembled monolayer.

[0055] Reference Figure 4 The self-assembled monolayer 220 may include a root group 221 bonded to the surface of the second fiber 210 and a functional group 223 connected to the root group 221 , and may also include a backbone 222 for connecting the root group 221 and the functional group 223 .

[0056] The radical group 221 may be bonded to the surface of the second fiber 210 , and may be selected according to the type of the second fiber 210 . Generally, a substance containing silicon atoms (Si) (eg, silane-based substances) may be selected.

[0057] The main chain 222 may be mainly composed of a base chain, and may be a hydrocarbon chain or a flow carbon chain.

[0058] The functional group 223 may include a functional group that can impart functionality, and may be selected from a variety of functional groups depending on what substance is to be attached.

[0059] The functional group may be at least one selected from an amine group, an amino group, a thiol group, a carboxyl group, a formyl group, a cyano group, a silanol group, a phosphine group, a phosphonic acid group, a sulfone group and an epoxy group.

[0060] Therefore, the surface of the second fiber 210 can be charged (+) to apply electrostatic force. When hydroxyl groups are formed on the surface of the carbon nanotube layer 230, the bonding force between the second fiber 210 and the carbon nanotube layer 230 (i.e., the bonding force between the self-assembled monolayer 220 and the carbon nanotube layer 230) can be improved.

[0061] On the other hand, hydroxyl groups may be formed on the surface of the second fiber 210 by activating the surface of the second fiber 210 , so that the radical group 221 is better bonded to the surface of the second fiber 210 .

[0062] In addition, a self-assembled monolayer can be formed on one side of the first fiber 110 to increase the bonding force between the first fiber 110 and the patterned heating layer 120. A protective layer (not shown) can be formed on the patterned heating layer 120 to protect the patterned heating layer 120, and a heat insulating layer (not shown) can be formed on the other side of the first fiber 110. This can minimize the loss caused by the heat generated in the patterned heating layer 120 being released to the outside through the first fiber 110, or the impact on the sensor sheet 200.

[0063] Figure 5 The present invention is a flowchart of a method for manufacturing a planar heating sheet integrated with a motion sensor according to an embodiment of the present invention.

[0064] Reference Figure 5 A method for manufacturing a planar heating sheet integrated with a motion sensor according to an embodiment of the present invention may include: step S100, preparing a dispersed solution including a plurality of carbon nanotubes; step S200, manufacturing a heating sheet portion; step S300, manufacturing a sensor sheet portion; and step S400, attaching the sensor sheet portion to the heating sheet portion.

[0065] First, a dispersion solution may be prepared by dispersing a plurality of carbon nanotubes in a dispersion medium (step S100 ).

[0066] The carbon nanotubes may be carbon nanotubes with hydroxyl groups formed on the surface, or may be carbon nanotubes with at least a portion of carbon bonding removed from the surface. The dispersion medium may be ultrapure water (DI water), but is not necessarily limited thereto. For example, the dispersion process may be performed while adding carbon nanotubes (e.g., 30 mg) to ultrapure water (e.g., 1 L) and stirring for 18 to 30 hours.

[0067] Then, the patterned heat generating layer 120 may be formed by providing a dispersion solution on one surface of the first fiber 110 , and the first electrode 130 electrically connected to the patterned heat generating layer 120 may be formed, thereby manufacturing the heat generating sheet 100 (step S200 ).

[0068] The patterned heat generating layer 120 may be formed by a vacuum adsorption method or a screen printing method, and may be patterned in a continuous mesh structure using a silk screen (or a mask).

[0069] Then, a self-assembled monolayer 220 containing functional groups can be formed on one side of the second fiber 210, a carbon nanotube layer 230 is formed by providing a dispersed solution on the self-assembled monolayer 220, and a second electrode 240 electrically connected to the carbon nanotube layer 230 is formed, thereby manufacturing the sensor sheet 200 (step S300).

[0070] The carbon nanotube layer 230 may also be formed by, for example, a vacuum adsorption method.

[0071] Then, the sensor sheet 200 may be attached to the heat generating sheet 100 so that the sensor sheet 200 is located on the other side of the first fiber 110 , thereby manufacturing the planar heat generating sheet 10 (step S400 ).

[0072] The above description is centered on the preferred embodiments of the present invention, but this is only an example and does not limit the present invention. A person skilled in the art of the present invention may modify and change the embodiments in various ways by adding, changing, deleting or adding constituent elements within the scope of the technical concept of the present invention as described in the attached claims, and this is also included in the scope of the rights of the present invention.

Claims

1. A planar heating sheet integrated with a motion sensor, wherein: include: The heating sheet comprises a first fiber, a pattern heating layer and a first electrode, wherein the pattern heating layer is formed on one side of the first fiber and is composed of a plurality of carbon nanotubes, and the first electrode is electrically connected to the pattern heating layer; and The sensor sheet comprises a second fiber, a self-assembled monolayer, a carbon nanotube layer and a second electrode, wherein the self-assembled monolayer is formed on one side of the second fiber and contains functional groups, the carbon nanotube layer is formed by a plurality of carbon nanotubes adsorbed on the self-assembled monolayer, and the A second electrode is electrically connected to the carbon nanotube layer; The sensor sheet is attached to the other surface of the first fiber.

2. The planar heating sheet with integrated motion sensor according to claim 1, wherein: The first fibers are composed of woven fibers.

3. The planar heating sheet integrated with a motion sensor according to claim 1, wherein: The second fibers are composed of knitted fabric fibers.

4. The planar heating sheet integrated with a motion sensor according to claim 1, wherein: The patterned heat-generating layer is formed as a continuous mesh structure with openings formed on one surface of the first fiber. The openings serve as vents in the ventilated seat.

5. The planar heating sheet integrated with a motion sensor according to claim 1, wherein: The sensor sheet detects a change in resistance of the carbon nanotube layer corresponding to deformation of the second fiber. The heat generating sheet controls power supplied to the pattern heat generating layer according to a detection result of the sensor sheet.

6. A method for manufacturing a planar heating sheet integrated with a motion sensor, in, include: A step of dispersing a plurality of carbon nanotubes in a dispersion medium to prepare a dispersed solution; A step of providing the dispersed solution on one side of the first fiber to form a patterned heat-generating layer, and forming a first electrode electrically connected to the patterned heat-generating layer, thereby manufacturing a heat-generating sheet; A step of forming a self-assembled monolayer containing functional groups on one side of the second fiber, forming a carbon nanotube layer by providing the dispersion solution on the self-assembled monolayer, and forming a second electrode electrically connected to the carbon nanotube layer, thereby manufacturing a sensor sheet; and The step of attaching the sensor sheet to the heat generating sheet so that the sensor sheet is located on the other surface of the first fiber.

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