Level-detection sensor

Abstract

The present invention relates to a level-detection sensor, and a level-detection sensor according to an embodiment of the present invention comprises: a first layer comprising a first electrode; a second layer comprising a second electrode; and a spacer separating the first layer and the second layer.

Description

Level detection sensor

[0001] The present invention relates to a level detection sensor.

[0002] Level detection of fluids and solids (bulk materials) is a common requirement in many industrial applications. Level detection is used in petrochemical and pharmaceutical processes, water treatment, and waste management.

[0003] Level detection typically involves electromechanical and ultrasonic techniques. While these methods offer viable solutions, they require significant power. They are unreliable in dusty conditions, lack configurability, and lack 3D level detection capabilities.

[0004] In industrial applications, fluid and solid detection can be broadly categorized into contact-based and non-contact sensing. Sensors requiring contact, called point-contact sensors, are inexpensive but cannot continuously measure the changing level of a material, only indicating whether a specified level has been reached. Furthermore, some liquids and solids can interfere with sensor movement or corrode the sensing mechanism.

[0005] Another problem is that level sensors are individually manufactured and used for each tank or product. Therefore, the manufacturing process is cumbersome, requiring them to be manufactured in various sizes to meet the needs of each product.

[0006] The background technology described above is technology that the inventor possessed or acquired in the process of deriving the disclosure of the present invention, and cannot necessarily be said to be publicly known technology disclosed to the general public prior to the present application.

[0007] The present invention is intended to solve the above-described problems, and an object of the present invention is to provide a level detection sensor that can be cut into various dimensions to suit the purpose of use and that increases measurement reliability.

[0008] However, the problems to be solved by the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0009] A level detection sensor according to one embodiment of the present invention comprises: a first layer including a first electrode; a second layer including a second electrode; and a spacer separating the first layer and the second layer.

[0010] In one embodiment, the spacer may be formed in multiple numbers between the first layer and the second layer.

[0011] In one embodiment, the spacer may be formed in plurality at regular intervals along the first electrode or the second electrode, or may include a plurality of holes formed in plurality at regular intervals along the first electrode or the second electrode.

[0012] In one embodiment, the second electrode may further include an electrode pad formed at the terminal.

[0013] In one embodiment, the second layer may further include a finishing portion including a resistance electrode extending and connected to one side of the second electrode.

[0014] In one embodiment, the first electrode and the second electrode may each be formed on one side of the substrate.

[0015] In one embodiment, the substrate is selected from the group consisting of polydimethylsiloxane (PDMS), thermoplastic polyurethane (TPU), styrene butadiene styrene (SBS), styrene ethylene butylene styrene (SEBS), ecoflex, hydrogel, organogel, polyethylene oxide (PEO), polystyrene (PS), polycaprolactone (PCL), polyacrylonitrile (PAN), polymethyl methacrylate (PMMA), polyimide (PI), polyvinylidene fluoride (PVDF), poly(n) vinylcarbazole (Poly(n) It may include at least one selected from the group consisting of polyvinylchloride (PVC), polyethylene terephthalate, polyethylene naphthalene, polycarbonate, polyacrylate, polyether sulfone, polypropylene, polymethylsiloxane, polydiphenylsiloxane, and polysiloxane.

[0016] In one embodiment, the other side of the substrate is made of polytetrafluoroethylene (PTFE), aromatic amide, polydimethylsiloxane (PDMS), thermoplastic polyurethane (TPU), styrene butadiene styrene (SBS), styrene ethylene butylene styrene (SEBS), ecoflex, hydrogel, organogel, polyethylene oxide (PEO), polystyrene (PS), polycaprolactone (PCL), polyacrylonitrile (PAN), polymethyl methacrylate (PMMA), polyimide, It may include a material including at least one selected from the group consisting of poly(vinylidene fluoride; PVDF), poly(n vinylcarbazole; PVK), polyvinylchloride (PVC), polyethylene terephthalate, polyethylene naphthalene, polycarbonate, polyacrylate, polyether sulfone, polypropylene, polymethylsiloxane, polydiphenylsiloxane, and polysiloxane.

[0017] In one embodiment, the first electrode and the second electrode may each include at least one selected from the group consisting of copper (Cu), gold (Au), platinum (Pt), silver (Ag), iron (Fe), cobalt (Co), nickel (Ni), aluminum (Al), chromium (Cr), tungsten (W), molybdenum (Mo), titanium (Ti), carbon black, carbon nanotubes (CNT), graphite, and graphene.

[0018] In one embodiment, the first electrode and the second electrode may each be formed by at least one printing method selected from the group consisting of inkjet type printing, extrusion type printing, screen type printing, gravure type printing, aerosol type printing, and 3D type printing.

[0019] In one embodiment, the spacer may include at least one selected from the group consisting of polyethyleneterephthalate (PET), polydimethylsiloxane (PDMS), polymethylsiloxane, polydiphenylsiloxane, polysiloxane, thermoplastic polyurethane (TPU), polyimide, styrene butadiene styrene (SBS), and styrene ethylene butylene styrene (SEBS).

[0020] In one embodiment, the level detection sensor may have a cross-section perpendicular to the longitudinal direction of the first electrode and the second electrode that is curved or arc-shaped.

[0021] In one embodiment, the distance between the first electrode and the second electrode may be 0.1 mm to 10 mm.

[0022] A level detection sensor according to another embodiment of the present invention comprises an inner electrode portion having a core-shell structure; and an outer electrode portion formed on a surface of the inner electrode portion; wherein the core includes an inner electrode, and the shell includes an insulating material.

[0023] In one embodiment, the shell may include at least one hole through which the inner electrode is exposed.

[0024] In one embodiment, the external electrode portion may include at least one substrate selected from the group consisting of a thermoplastic polyolefin (TPO) elastic material, a thermoplastic polyurethane (TPU), a thermoplastic elastomer (TPE), a thermoplastic polyolefin elastomer (TPEO), a thermoplastic polyether-based polyurethane elastomer (TPEU), and a thermoplastic polyurethane-based (TPU-based) elastomer, and an external electrode formed on an inner surface of the substrate.

[0025] In one embodiment, the outer surface of the external electrode part is made of polytetrafluoroethylene (PTFE), aromatic amide, polydimethylsiloxane (PDMS), thermoplastic polyurethane (TPU), styrene butadiene styrene (SBS), styrene ethylene butylene styrene (SEBS), ecoflex, hydrogel, organogel, polyethylene oxide (PEO), polystyrene (PS), polycaprolactone (PCL), polyacrylonitrile (PAN), polymethyl methacrylate (PMMA), polyimide, It may include a material including at least one selected from the group consisting of poly(vinylidene fluoride; PVDF), poly(n vinylcarbazole; PVK), polyvinylchloride (PVC), polyethylene terephthalate, polyethylene naphthalene, polycarbonate, polyacrylate, polyether sulfone, polypropylene, polymethylsiloxane, polydiphenylsiloxane, and polysiloxane.

[0026] In one embodiment, the inner electrode and the outer electrode may each include at least one selected from the group consisting of copper (Cu), gold (Au), platinum (Pt), silver (Ag), iron (Fe), cobalt (Co), nickel (Ni), aluminum (Al), chromium (Cr), tungsten (W), molybdenum (Mo), titanium (Ti), carbon black, carbon nanotubes (CNT), graphite, and graphene.

[0027] In one embodiment, the external electrode may be formed by at least one printing method selected from the group consisting of inkjet type printing, extrusion type printing, screen type printing, gravure type printing, aerosol type printing, and 3D type printing.

[0028] In one embodiment, the shell may be selected from the group consisting of styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-butylene-styrene block copolymer (SEBS), styrene-butadiene block copolymer (SBR), styrene-ethylene-propylene-styrene block copolymer (SEPS), styrene-acrylate copolymer, styrene-methyl methacrylate copolymer (PSMMA), and styrene-acrylonitrile copolymer (PSAN).

[0029] A level detection sensor according to one embodiment of the present invention can quickly and accurately measure a response signal corresponding to the level of a measurement object. Furthermore, the sensing portion boasts excellent water and chemical resistance, protecting it from external environments and ensuring high measurement reliability. Furthermore, as a rectangular sensor, it can be easily cut into various sizes to suit the user's needs.

[0030] FIG. 1A is a schematic perspective view of a level detection sensor according to one embodiment of the present invention.

[0031] FIG. 1b is a schematic cross-sectional view of a level detection sensor according to one embodiment of the present invention.

[0032] FIGS. 2A to 2D illustrate spacers according to various embodiments of the present invention.

[0033] FIGS. 3A and 3B are schematic drawings of a level detection sensor according to another embodiment of the present invention.

[0034] FIG. 4a is a schematic perspective view of a level detection sensor according to another embodiment of the present invention.

[0035] FIG. 4b is a schematic cross-sectional view of a level detection sensor according to another embodiment of the present invention.

[0036] Hereinafter, embodiments are described in detail with reference to the attached drawings. However, the embodiments may be modified in various ways, and the scope of the patent application is not limited or restricted by these embodiments. It should be understood that all modifications, equivalents, or alternatives to the embodiments are included within the scope of the patent application.

[0037] The terms used in the examples are for illustrative purposes only and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "comprise" or "have" are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but should be understood to not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0038] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiments pertain. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0039]

[0040] In addition, when describing with reference to the attached drawings, identical components will be assigned the same reference numerals regardless of the drawing numbers, and redundant descriptions thereof will be omitted. When describing embodiments, if a detailed description of a related known technology is judged to unnecessarily obscure the gist of the embodiment, the detailed description will be omitted.

[0041] Additionally, terms such as first, second, A, B, (a), (b), etc. may be used to describe components of the embodiment. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by the terms.

[0042] Components included in one embodiment and components with common functions will be described using the same names in other embodiments. Unless otherwise stated, the descriptions given in one embodiment may also apply to other embodiments, and detailed descriptions will be omitted to the extent of overlap.

[0043]

[0044] Hereinafter, the level detection sensor of the present invention will be described in detail with reference to examples and drawings. However, the present invention is not limited to these examples and drawings.

[0045]

[0046] A level detection sensor according to one embodiment of the present invention comprises: a first layer including a first electrode; a second layer including a second electrode; and a spacer separating the first layer and the second layer.

[0047] A level detection sensor according to one embodiment of the present invention can quickly and accurately measure a response signal regarding the level of a measurement object. Furthermore, the sensing portion boasts excellent water and chemical resistance, protecting it from external environments and ensuring high measurement reliability. Furthermore, as a rectangular sensor, it can be easily cut into various sizes to suit the user's needs.

[0048] The measurement object whose level is measured by the level detection sensor of the present invention may be not only water, chemicals, petroleum, and liquids, but also solids such as grain and livestock feed.

[0049] FIG. 1a is a schematic perspective view of a level detection sensor according to one embodiment of the present invention, and FIG. 1b is a schematic cross-sectional view of a level detection sensor according to one embodiment of the present invention.

[0050] Referring to FIGS. 1A and 1B, a level detection sensor (100) according to one embodiment of the present invention includes a first layer (110), a spacer (120), and a second layer (130).

[0051] The first layer (110) includes a first electrode (114) formed on a substrate (112).

[0052] In one embodiment, the first electrode (114) may be formed on one side of the substrate (112). In addition, the second electrode (134) may be formed on one side of the substrate (132). Accordingly, the first electrode (114) and the second electrode (134) may form a vertically stacked structure facing each other with a predetermined gap space between the substrate (112) and the substrate (134).

[0053] In one embodiment, the substrate (112) is made of polydimethylsiloxane (PDMS), thermoplastic polyurethane (TPU), styrene butadiene styrene (SBS), styrene ethylene butylene styrene (SEBS), ecoflex, hydrogel, organogel, polyethylene oxide (PEO), polystyrene (PS), polycaprolactone (PCL), polyacrylonitrile (PAN), polymethyl methacrylate (PMMA), polyimide (PI), polyvinylidene fluoride (PVDF), It may include at least one selected from the group consisting of poly(n vinylcarbazole; PVK), polyvinylchloride (PVC), polyethylene terephthalate, polyethylene naphthalene, polycarbonate, polyacrylate, polyether sulfone, polypropylene, polymethylsiloxane, polydiphenylsiloxane, and polysiloxane.

[0054] Preferably, the substrate (112) may be thermoplastic polyurethane (TPU).

[0055] In one embodiment, the other side of the substrate (112) is made of polytetrafluoroethylene (PTFE), aromatic amide, polydimethylsiloxane (PDMS), thermoplastic polyurethane (TPU), styrene butadiene styrene (SBS), styrene ethylene butylene styrene (SEBS), ecoflex, hydrogel, organogel, polyethylene oxide (PEO), polystyrene (PS), polycaprolactone (PCL), polyacrylonitrile (PAN), polymethyl methacrylate (PMMA), polyimide, It may include a material including at least one selected from the group consisting of poly(vinylidene fluoride; PVDF), poly(n vinylcarbazole; PVK), polyvinylchloride (PVC), polyethylene terephthalate, polyethylene naphthalene, polycarbonate, polyacrylate, polyether sulfone, polypropylene, polymethylsiloxane, polydiphenylsiloxane, and polysiloxane.

[0056] Preferably, the other side of the substrate (112) may be made of Teflon, which has excellent chemical resistance.

[0057] In one embodiment, the first electrode (114) may include at least one selected from the group consisting of copper (Cu), gold (Au), platinum (Pt), silver (Ag), iron (Fe), cobalt (Co), nickel (Ni), aluminum (Al), chromium (Cr), tungsten (W), molybdenum (Mo), titanium (Ti), carbon black, carbon nanotubes (CNT), graphite, and graphene.

[0058] The above first electrode (114) may be in at least one form selected from the group consisting of metal nanowires, metal flakes, and metal nanoparticles.

[0059] For example, it may be silver (Ag) nanowires, silver (Ag) flakes, or silver (Ag) nanoparticles.

[0060] Preferably, the first electrode (114) may be made of silver (Ag) and a polymer electrode material. In one embodiment, the first electrode (114) may be formed by at least one printing method selected from the group consisting of inkjet printing, extrusion printing, screen printing, gravure printing, aerosol printing, and 3D printing.

[0061] The above first electrode (114) can be placed in a rectangular shape at the center of the substrate (112).

[0062] The above spacer (120) may maintain a distance between the first layer (110) and the second layer (130).

[0063] The above spacer (120) may be formed at the edge of the substrate (132).

[0064] In one embodiment, the spacer (120) may be formed in multiple numbers between the first layer (110) and the second layer (130).

[0065] In one embodiment, the spacer (120) may be formed in a plurality of pieces separated at regular intervals along the first electrode (114) or the second electrode (134), or may include a plurality of holes formed in a plurality of pieces separated at regular intervals along the first electrode (114) or the second electrode (134).

[0066] Accordingly, the first layer (110) and the second layer (130) may be electrically or physically separated from the first electrode (114) and the second electrode (134) by a spacer (120) or air.

[0067] FIGS. 2A to 2D illustrate spacers according to various embodiments of the present invention.

[0068] As shown in Fig. 2a, three spacers (120) may be formed at regular intervals on the second electrode (134).

[0069] As shown in Fig. 2b, two spacers (120) may be formed on the second electrode (134) at a certain interval.

[0070] As shown in Fig. 2c, a spacer (120) including a plurality of holes may be formed on the second electrode (134).

[0071] As shown in FIG. 2d, the spacer (120) may be formed at the edge of the substrate (132), and two spacers (120) may be formed spaced apart from each other on the second electrode (134).

[0072] FIGS. 2A to 2D are examples, and the spacer may be formed in any shape as long as it has various shapes that separate the first layer (110) and the second layer (130).

[0073] In one embodiment, the spacer (120) may include at least one selected from the group consisting of polyethyleneterephthalate (PET), polydimethylsiloxane (PDMS), polymethylsiloxane, polydiphenylsiloxane, polysiloxane, thermoplastic polyurethane (TPU), polyimide, styrene butadiene styrene (SBS), and styrene ethylene butylene styrene (SEBS).

[0074] Preferably, the spacer (120) may be made of polyethylene terephthalate (PET).

[0075] The second layer (130) includes a second electrode (134) formed on a substrate (132). The second electrode (134) may be formed on one side of the substrate (132).

[0076] In one embodiment, the substrate (132) is made of polydimethylsiloxane (PDMS), thermoplastic polyurethane (TPU), styrene butadiene styrene (SBS), styrene ethylene butylene styrene (SEBS), ecoflex, hydrogel, organogel, polyethylene oxide (PEO), polystyrene (PS), polycaprolactone (PCL), polyacrylonitrile (PAN), polymethyl methacrylate (PMMA), polyimide (PI), polyvinylidene fluoride (PVDF), It may include at least one selected from the group consisting of poly(n vinylcarbazole; PVK), polyvinylchloride (PVC), polyethylene terephthalate, polyethylene naphthalene, polycarbonate, polyacrylate, polyether sulfone, polypropylene, polymethylsiloxane, polydiphenylsiloxane, and polysiloxane.

[0077] Preferably, the substrate (132) may be thermoplastic polyurethane (TPU).

[0078] In one embodiment, the other side of the substrate (132) is made of polytetrafluoroethylene (PTFE), aromatic amide, polydimethylsiloxane (PDMS), thermoplastic polyurethane (TPU), styrene butadiene styrene (SBS), styrene ethylene butylene styrene (SEBS), ecoflex, hydrogel, organogel, polyethylene oxide (PEO), polystyrene (PS), polycaprolactone (PCL), polyacrylonitrile (PAN), polymethyl methacrylate (PMMA), polyimide, It may include a material including at least one selected from the group consisting of poly(vinylidene fluoride; PVDF), poly(n vinylcarbazole; PVK), polyvinylchloride (PVC), polyethylene terephthalate, polyethylene naphthalene, polycarbonate, polyacrylate, polyether sulfone, polypropylene, polymethylsiloxane, polydiphenylsiloxane, and polysiloxane.

[0079] Preferably, the other side of the substrate (132) may be made of Teflon (PTFE) which has excellent chemical resistance.

[0080] The second electrode (134) may be two electrodes that are spaced apart from each other without contacting each other to measure electrode potential. The potential difference between two points may be measured using two second electrodes (134).

[0081] In one embodiment, the second electrode (134) may include at least one selected from the group consisting of copper (Cu), gold (Au), platinum (Pt), silver (Ag), iron (Fe), cobalt (Co), nickel (Ni), aluminum (Al), chromium (Cr), tungsten (W), molybdenum (Mo), titanium (Ti), carbon black, carbon nanotubes (CNT), graphite, and graphene.

[0082] The second electrode (134) may be formed in at least one form selected from the group consisting of metal nanowires, metal flakes, and metal nanoparticles.

[0083] For example, it may be silver (Ag) nanowires, silver (Ag) flakes, or silver (Ag) nanoparticles.

[0084] Preferably, the second electrode (134) may be a silver (Ag) and polymer electrode material.

[0085] In one embodiment, the second electrode (134) may be formed by at least one printing method selected from the group consisting of inkjet type printing, extrusion type printing, screen type printing, gravure type printing, aerosol type printing, and 3D type printing.

[0086] Preferably, the second electrode (134) may be printed using inkjet type printing.

[0087] In one embodiment, the separation distance between the first electrode (114) and the second electrode (134) may be 0.1 mm to 10 mm; 0.1 mm to 8 mm; 0.1 mm to 5 mm; 0.1 mm to 3 mm; 0.1 mm to 1 mm; 0.5 mm to 10 mm; 0.5 mm to 8 mm; 0.5 mm to 5 mm; 0.5 mm to 3 mm; 0.5 mm to 1 mm; 1 mm to 10 mm; 1 mm to 8 mm; 1 mm to 5 mm; 1 mm to 3 mm; 3 mm to 10 mm; 3 mm to 8 mm; 3 mm to 5 mm; 5 mm to 10 mm; 5 mm to 8 mm; or 8 mm to 10 mm.

[0088] If the separation distance between the first electrode (114) and the second electrode (134) is less than 0.1 mm, a problem may arise in which the electrodes of the upper and lower layers touch each other even with slight deformation or temperature change, thereby interfering with sensing, and if it exceeds 10 mm, a problem may arise in which it is difficult for the electrodes of the upper and lower layers to meet regardless of the force applied thereto.

[0089] In one embodiment, the second electrode (134) may further include an electrode pad (not shown) formed at the end thereof.

[0090] The above electrode pads may be provided with connecting lines for transmitting signals to the outside for signal processing or for supplying power.

[0091]

[0092] FIGS. 3A and 3B are schematic drawings of a level detection sensor according to another embodiment of the present invention.

[0093] Referring to FIG. 3a, the level detection sensor of the present invention according to an exemplary embodiment may be manufactured by a continuous printing process.

[0094] Referring to FIG. 3b, the second layer (130) may further include a closing portion (142) including a resistance electrode extended and connected to one side of the second electrode (134).

[0095] The closing portion (142) formed on the left side of the above level detection sensor (100) may be closed by including the second electrode (134) as a resistance electrode.

[0096] The end on the right may have a power supply connection or may be finished with an anisotropic conductive film (ACF).

[0097] Accordingly, the level detection sensor of the present invention can be easily used by a user for a specific purpose by cutting it into various sizes to fit the desired dimensions and connecting the end portion (142). Specifically, it can be used by cutting it into a desired size according to the tank size, forming the end portion, and attaching it to the tank.

[0098] In one embodiment, the level detection sensor (100) may have a vertical cross-section with respect to the longitudinal direction of the first electrode (114) and the second electrode (134) in a curved or arc shape.

[0099] Accordingly, even when deformed on a curved surface, the first electrode (114) and the second electrode (134) can maintain a gap space spaced apart at a constant interval. In order to maintain a gap space spaced apart at a constant interval, the curved surface or arc shape may be formed such that the outer length is longer than the inner length of the curved surface or arc.

[0100]

[0101] A level detection sensor according to another embodiment of the present invention comprises an inner electrode portion having a core-shell structure; and an outer electrode portion formed on a surface of the inner electrode portion; wherein the core includes an inner electrode, and the shell includes an insulating material.

[0102] FIG. 4a is a schematic perspective view of a level detection sensor according to another embodiment of the present invention, and FIG. 4b is a schematic cross-sectional view of a level detection sensor according to another embodiment of the present invention.

[0103] Referring to FIGS. 4a and 4b, a level detection sensor (200) according to another embodiment of the present invention includes an internal electrode portion (210) and an external electrode portion (220).

[0104] The above internal electrode part (210) has a core-shell structure, the core is an internal electrode (214), and the shell includes an insulating material (212).

[0105] In one embodiment, the shell may include at least one hole through which the inner electrode is exposed, as illustrated in the drawing.

[0106] Therefore, the internal electrode (214) exposed by the hole can conduct electricity when in contact with the external electrode (224).

[0107] In one embodiment, the internal electrode (214) may include at least one selected from the group consisting of copper (Cu), gold (Au), platinum (Pt), silver (Ag), iron (Fe), cobalt (Co), nickel (Ni), aluminum (Al), chromium (Cr), tungsten (W), molybdenum (Mo), titanium (Ti), carbon black, carbon nanotubes (CNT), graphite, and graphene.

[0108] In one embodiment, the shell may be selected from the group consisting of styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-butylene-styrene block copolymer (SEBS), styrene-butadiene block copolymer (SBR), styrene-ethylene-propylene-styrene block copolymer (SEPS), styrene-acrylate copolymer, styrene-methyl methacrylate copolymer (PSMMA), and styrene-acrylonitrile copolymer (PSAN).

[0109] The shell including the insulating material (212) may have the same role as a spacer in the level detection sensor according to one embodiment of the present invention, and may maintain the distance between the inner electrode (214) and the outer electrode (224).

[0110] The above internal electrode (214) may include at least one selected from the group consisting of copper (Cu), gold (Au), platinum (Pt), silver (Ag), iron (Fe), cobalt (Co), nickel (Ni), aluminum (Al), chromium (Cr), tungsten (W), molybdenum (Mo), titanium (Ti), carbon black, carbon nanotubes (CNT), graphite, and graphene.

[0111] Preferably, the inner electrode (214) may be made of copper.

[0112] In one embodiment, the external electrode portion may include at least one substrate (222) selected from the group consisting of a thermoplastic polyolefin (TPO) elastic material, a thermoplastic polyurethane (TPU), a thermoplastic elastomer (TPE), a thermoplastic polyolefin elastomer (TPEO), a thermoplastic polyether-based polyurethane elastomer (TPEU), and a thermoplastic polyurethane-based (TPU-based) elastomer, and an external electrode (224) formed on an inner surface of the substrate (222). The external electrode (224) may be arranged in a curved shape at the center of the substrate (222).

[0113] Preferably, the substrate (212) may be thermoplastic polyurethane (TPU).

[0114] In one embodiment, the outer surface of the external electrode portion (220) may include a material including at least one selected from the group consisting of Teflon (polytetrafluoroethylene, PTFE), aromatic amide, silicon rubber, and polyimide (polyimide, PI).

[0115] Preferably, the outer surface of the external electrode portion (220) may be made of Teflon, which has excellent chemical resistance.

[0116] In one embodiment, the external electrode (224) may include at least one selected from the group consisting of copper (Cu), gold (Au), platinum (Pt), silver (Ag), iron (Fe), cobalt (Co), nickel (Ni), aluminum (Al), chromium (Cr), tungsten (W), molybdenum (Mo), titanium (Ti), carbon black, carbon nanotubes (CNT), graphite, and graphene.

[0117] Preferably, the external electrode (224) may be made of copper.

[0118] In one embodiment, the external electrode (224) may be formed by at least one printing method selected from the group consisting of inkjet type printing, extrusion type printing, screen type printing, gravure type printing, aerosol type printing, and 3D type printing.

[0119] Preferably, the external electrode (224) may be printed using inkjet type printing.

[0120]

[0121] Although the embodiments described above have been described with limited drawings, those skilled in the art will appreciate that various technical modifications and variations can be applied based on the above. For example, appropriate results can still be achieved even if the described techniques are performed in a different order than described, and / or components of the described systems, structures, devices, circuits, etc. are combined or combined in a different manner than described, or are replaced or substituted with other components or equivalents.

[0122] Therefore, other implementations, other embodiments, and equivalents to the claims also fall within the scope of the claims described below.

Claims

1. A first layer including a first electrode; a second layer comprising a second electrode; and A spacer separating the first layer and the second layer; including, Level detection sensor.

2. In paragraph 1, The above spacer is formed in multiple numbers between the first layer and the second layer. Level detection sensor.

3. In paragraph 1, The above spacer, A plurality of them are formed at regular intervals along the first electrode or the second electrode, or It comprises a plurality of holes formed at regular intervals along the first electrode or the second electrode. Level detection sensor.

4. In paragraph 1, An electrode pad formed at the second electrode terminal; including more, Level detection sensor.

5. In paragraph 1, The second layer above is, A termination portion including a resistance electrode extended and connected to one side of the second electrode; including more, Level detection sensor.

6. In paragraph 1, The first electrode and the second electrode are each formed on one side of the substrate, The substrate may be polydimethylsiloxane (PDMS), thermoplastic polyurethane (TPU), styrene butadiene styrene (SBS), styrene ethylene butylene styrene (SEBS), ecoflex, hydrogel, organogel, polyethylene oxide (PEO), polystyrene (PS), polycaprolactone (PCL), polyacrylonitrile (PAN), polymethyl methacrylate (PMMA), polyimide (PI), polyvinylidene fluoride (PVDF), polyn-vinylcarbazole (PVDF). A composition comprising at least one selected from the group consisting of polyvinylchloride (PVC), polyethylene terephthalate, polyethylene naphthalene, polycarbonate, polyacrylate, polyether sulfone, polypropylene, polymethylsiloxane, polydiphenylsiloxane, and polysiloxane. Level detection sensor.

7. In paragraph 6, The other side of the above substrate, Teflon (polytetrafluoroethylene, PTFE), aromatic amide, polydimethylsiloxane (PDMS), thermoplastic polyurethane (TPU), styrene butadiene styrene (SBS), styrene ethylene butylene styrene (SEBS), ecoflex, hydrogel, organogel, polyethylene oxide (PEO), polystyrene (PS), polycaprolactone (PCL), polyacrylonitrile (PAN), polymethyl methacrylate (PMMA), polyimide, polyvinylidene fluoride (PVDF), A material comprising at least one selected from the group consisting of poly(n vinylcarbazole; PVK), polyvinylchloride (PVC), polyethylene terephthalate, polyethylene naphthalene, polycarbonate, polyacrylate, polyether sulfone, polypropylene, polymethylsiloxane, polydiphenylsiloxane, and polysiloxane. Level detection sensor.

8. In paragraph 1, The first electrode and the second electrode are, respectively, Containing at least one selected from the group consisting of copper (Cu), gold (Au), platinum (Pt), silver (Ag), iron (Fe), cobalt (Co), nickel (Ni), aluminum (Al), chromium (Cr), tungsten (W), molybdenum (Mo), titanium (Ti), carbon black, carbon nanotubes (CNT), graphite, and graphene. Level detection sensor.

9. In paragraph 1, The first electrode and the second electrode are, respectively, Formed by at least one printing method selected from the group consisting of inkjet type printing, extrusion type printing, screen type printing, gravure type printing, aerosol type printing and 3D type printing, Level detection sensor.

10. In paragraph 1, The above spacer, Containing at least one selected from the group consisting of polyethyleneterephthalate (PET), polydimethylsiloxane (PDMS), polymethylsiloxane, polydiphenylsiloxane, polysiloxane, thermoplastic polyurethane (TPU), polyimide, styrene butadiene styrene (SBS), and styrene ethylene butylene styrene (SEBS). Level detection sensor.

11. In paragraph 1, The above level detection sensor, The vertical cross-section of the first electrode and the second electrode in the longitudinal direction is curved or arc-shaped, Level detection sensor.

12. In paragraph 1, The distance between the first electrode and the second electrode is 0.1 mm to 10 mm, Level detection sensor.

13. Internal electrode part of core-shell structure; and An external electrode portion formed on the surface of the internal electrode portion; Including, The core includes an inner electrode, and the shell includes an insulating material. Level detection sensor.

14. In paragraph 13, The above shell is, comprising at least one hole so that the inner electrode is exposed; Level detection sensor.

15. In paragraph 13, The above external electrode part, A substrate comprising at least one selected from the group consisting of a thermoplastic polyolefin (TPO) elastic material, a thermoplastic polyurethane (TPU), a thermoplastic elastomer (TPE), a thermoplastic polyolefin elastomer (TPEO), a thermoplastic polyether-based polyurethane elastomer (TPEU), and a thermoplastic polyurethane-based (TPU-based) elastomer, and an external electrode formed on the inner surface of the substrate. Level detection sensor.

16. In paragraph 13, The outer surface of the above external electrode part is Teflon (polytetrafluoroethylene, PTFE), aromatic amide, polydimethylsiloxane (PDMS), thermoplastic polyurethane (TPU), styrene butadiene styrene (SBS), styrene ethylene butylene styrene (SEBS), ecoflex, hydrogel, organogel, polyethylene oxide (PEO), polystyrene (PS), polycaprolactone (PCL), polyacrylonitrile (PAN), polymethyl methacrylate (PMMA), polyimide, polyvinylidene fluoride (PVDF), A material comprising at least one selected from the group consisting of poly(n vinylcarbazole; PVK), polyvinylchloride (PVC), polyethylene terephthalate, polyethylene naphthalene, polycarbonate, polyacrylate, polyether sulfone, polypropylene, polymethylsiloxane, polydiphenylsiloxane, and polysiloxane. Level detection sensor.

17. In paragraph 15, The above inner and outer electrodes are, respectively, Contains at least one selected from the group consisting of copper (Cu), gold (Au), platinum (Pt), silver (Ag), iron (Fe), cobalt (Co), nickel (Ni), aluminum (Al), chromium (Cr), tungsten (W), molybdenum (Mo), titanium (Ti), carbon black, carbon nanotubes (CNT), graphite, and graphene, The above external electrode is formed by at least one printing method selected from the group consisting of inkjet type printing, extrusion type printing, screen type printing, gravure type printing, aerosol type printing and 3D type printing. Level detection sensor.

18. In paragraph 13, The above shell is, A polymer selected from the group consisting of styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-butylene-styrene block copolymer (SEBS), styrene-butadiene block copolymer (SBR), styrene-ethylene-propylene-styrene block copolymer (SEPS), styrene-acrylate copolymer, styrene-methyl methacrylate copolymer (PSMMA), and styrene-acrylonitrile copolymer (PSAN). Level detection sensor.

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