Wireless non-contact voltage measuring device and method

Abstract

The present invention discloses a wireless non-contact voltage measuring device and method capable of measuring voltage supplied from a power transformer installed in a transmission line of a substation, a substation facility, an industrial site, a building, etc., in a wireless non-contact manner. A wireless non-contact voltage measuring device according to the present invention may include: an antenna unit that is spaced apart from a transformer at a certain distance and generates a voltage by exciting an electromotive force by the electric field when moving into the electric field of the transformer; a detection amplifier that rectifies and amplifies the generated voltage; a digital converter that converts the rectified and amplified voltage into a digital signal; a voltage analysis unit that analyzes a potential level for the converted digital signal; and a display unit that displays the analyzed potential level as a voltage.

Description

Technology Field

[0001] The present invention relates to a wireless non-contact voltage measuring device and method, and more specifically, to a wireless non-contact voltage measuring device and method capable of measuring the voltage supplied from a power transformer installed near a substation in a wireless non-contact manner. Background Technology

[0002] Generally, power transformers are installed in substations or their transmission lines to receive power from power plants, convert it into the required power source, and supply it.

[0003] These power transformers supply high voltages ranging from thousands to hundreds of thousands of volts (V), for example.

[0004] Therefore, there is a problem that it is very dangerous when a worker measures the voltage supplied by a power transformer using measuring equipment. Prior art literature

[0005] A related prior art patent document is Korean Published Patent Application No. 10-2011-0074368 (published on June 30, 2011), which describes an IEC-61850-based substation automation system device and a control method thereof. The problem to be solved

[0006] The objective of the present invention is to provide a wireless non-contact voltage measuring device and method that enable the measurement of voltage supplied from a power transformer installed in a transmission line of a substation, a substation facility, an industrial site, a building, etc., in a wireless non-contact manner. means of solving the problem

[0007] A wireless non-contact voltage measuring device according to an embodiment of the present invention for achieving the aforementioned purpose may include: an antenna unit that is spaced apart from a transformer at a certain distance and generates a voltage by exciting an electromotive force by the electric field when moving into the electric field of the transformer; a detection amplifier that rectifies and amplifies the generated voltage; a digital converter unit that converts the rectified and amplified voltage into a digital signal; a voltage analysis unit that analyzes a potential level for the converted digital signal; and a display unit that displays the analyzed potential level as a voltage.

[0008] In addition, the antenna section includes a plurality of branch antennas, and the plurality of branch antennas may have an octopus-type or duck-type form.

[0009] Additionally, the antenna section may include an excitation core in which an electromotive force is excited by an electric field from the transformer; a plurality of branch antennas electrically connected to the excitation core; and a plate having a certain area that receives the electromotive force excited in the excitation core through the plurality of branch antennas.

[0010] In addition, it may further include a hazardous substance detection unit that detects hazardous substances present around the transformer.

[0011] And, the hazardous substance detection unit comprises a unit cell including a source electrode and a drain electrode spaced apart from each other, a detection film which is a channel between the source electrode and the drain electrode, and a gate electrode spaced apart from the detection film; an upper substrate on which the source electrode, the drain electrode, and the detection film are formed; and a lower substrate on which the gate electrode is formed, wherein the upper substrate and the lower substrate are stacked and coupled vertically, and on the upper substrate, drain wiring electrically connected to the drain electrode is spaced apart from each other while extending parallel in a first direction, and on the lower substrate, source wiring electrically connected to the source electrode is spaced apart from each other while extending parallel in a second direction that is not parallel to the first direction, and a receptor that binds to the hazardous substance may be formed on the detection film.

[0012] Meanwhile, a wireless non-contact voltage measurement method according to an embodiment of the present invention for achieving the aforementioned purpose may include: (a) a step in which an electromotive force is excited by an electric field when the antenna part moves into the electric field of the transformer, thereby generating a voltage in the antenna part; (b) a step in which the detection amplifier rectifies and amplifies the generated voltage; (c) a step in which the digital converter converts the rectified and amplified voltage into a digital signal; (d) a step in which the voltage analysis part analyzes a potential level for the converted digital signal; and (e) a step in which the display part displays the analyzed potential level as a voltage.

[0013] In addition, in step (a) above, the antenna part generates an electromotive force in the excitation core by the electric field according to the electric field strength of the transformer, and the generated voltage can be transmitted to a plate having a certain area through a plurality of ground wire antennas.

[0014] In addition, (f) the above hazardous substance detection unit may further include the step of detecting hazardous substances present around the transformer.

[0015] In addition, the step of detecting the harmful substance may involve detecting the harmful substance through a detection membrane, and a plurality of receptors to which the harmful substance binds may be formed on the detection membrane.

[0016] In addition, the step of detecting the harmful substance involves attaching a protein or glycated protein corresponding to the harmful substance to the plurality of receptors, and connecting the protein or glycated protein attached to the plurality of receptors to the detection membrane, so that when a change in current is induced in the detection membrane and the change in current exceeds a certain level, the harmful substance can be recognized as being detected. Effects of the invention

[0017] According to an embodiment of the present invention, a worker can measure the voltage of a transformer on a transmission line of a substation in a wireless, non-contact manner.

[0018] In addition, according to an embodiment of the present invention, voltage can be measured wirelessly and non-contactually around a high-voltage transformer, allowing a worker to safely measure the voltage.

[0019] In addition, according to an embodiment of the present invention, when a worker measures the voltage of a transformer, hazardous substances present around the transformer can be detected, allowing for immediate response to hazardous environments.

[0020] In addition, according to an embodiment of the present invention, since the voltage of a transformer can be measured wirelessly and non-contactually through a measuring device that can be carried by a worker, there is no need to provide separate measuring equipment, thereby reducing measurement costs.

[0021] In addition, according to an embodiment of the present invention, there is an advantage in that the measurement time is shortened by measuring the voltage of the transformer using a simple measuring device carried by a worker. Brief explanation of the drawing

[0022] FIG. 1 is a schematic diagram showing the main configuration of a wireless non-contact voltage measuring device according to an embodiment of the present invention. FIG. 2 is a diagram showing the detailed configuration of an antenna section according to an embodiment of the present invention. FIG. 3 is a diagram showing an example in which a wireless non-contact voltage measuring device according to an embodiment of the present invention includes a hazardous substance detection unit. FIG. 4 is a diagram showing an example of the configuration of a hazardous substance detection unit according to an embodiment of the present invention. FIG. 5 is a diagram showing an operation flowchart to explain a wireless non-contact voltage measurement method according to an embodiment of the present invention. Specific details for implementing the invention

[0023] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Accordingly, in some embodiments, well-known process steps, well-known device structures, and well-known techniques are not specifically described to avoid the present invention being interpreted ambiguously. Throughout the specification, like reference numerals refer to like components.

[0024] In the drawings, thicknesses have been enlarged to clearly represent various layers and regions. Throughout the specification, the same reference numerals have been used for similar parts. When a part such as a layer, film, region, or plate is described as being "above" another part, this includes not only cases where it is "immediately above" another part, but also cases where there is another part in between. Conversely, when a part is described as being "immediately above" another part, it means that there is no other part in between. Furthermore, when a part such as a layer, film, region, or plate is described as being "below" another part, this includes not only cases where it is "immediately below" another part, but also cases where there is another part in between. Conversely, when a part is described as being "immediately below" another part, it means that there is no other part in between.

[0025] Spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used to facilitate the description of the relationship between one element or component and another, as illustrated in the drawings. Spatially relative terms should be understood as terms that include different orientations of the element during use or operation, in addition to the orientations illustrated in the drawings. For example, if an element illustrated in the drawings is flipped, the element described as "below" or "beneath" of another element may be placed "above" of that other element. Therefore, the exemplary term "below" may include both the lower and upper directions. Elements may also be oriented in other directions, and accordingly, spatially relative terms may be interpreted according to the orientation.

[0026] In this specification, when it is stated that a part is connected to another part, this includes not only cases where they are directly connected, but also cases where they are electrically connected with other elements interposed between them. Furthermore, when it is stated that a part includes a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0027] In this specification, terms such as first, second, third, etc. may be used to describe various components, but these components are not limited by said terms. These terms are used for the purpose of distinguishing one component from other components. For example, without departing from the scope of the present invention, the first component may be named the second or third component, and similarly, the second or third component may be named alternately.

[0028] Unless otherwise defined, all terms used in this specification (including technical and scientific terms) may be used in a meaning commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0029] A wireless non-contact voltage measuring device and method according to a preferred embodiment of the present invention will be described below with reference to the attached drawings.

[0030] FIG. 1 is a schematic diagram showing the main configuration of a wireless non-contact voltage measuring device according to an embodiment of the present invention.

[0031] Referring to FIG. 1, a wireless non-contact voltage measuring device (100) according to an embodiment of the present invention may include an antenna unit (110), a detection amplifier (120), a digital conversion unit (130), a voltage analysis unit (140), a display unit (150), a communication unit (160), and a power supply unit (170).

[0032] The antenna part (110) is separated from the power transformer (102) by a certain distance, and when it moves into the electric field of the power transformer (102), an electromotive force is excited by the electric field and a voltage is generated.

[0033] A power transformer (102) converts power of a first voltage supplied from a power plant or an energy storage system (ESS) into power of a second voltage. Here, the first voltage may be 154kV and the second voltage may be 22.9kV. Additionally, the first voltage may be one of 22.9kV, 66kV, and 154kV, and the second voltage may be 110 to 220V.

[0034] The power transformer (102) can be, for example, a three-phase transformer.

[0035] The detection amplifier (120) rectifies and amplifies the generated voltage. The detection amplifier (120) may include a bandwith filter.

[0036] The digital conversion unit (130) converts the rectified and amplified voltage into a digital signal. The digital conversion unit (130) may include, for example, an analog to digital converter.

[0037] The voltage analysis unit (140) analyzes the potential level for the converted digital signal. The voltage analysis unit (140) can output the analyzed potential level as a numeric voltage. The voltage analysis unit (140) can be implemented, for example, as a microprocessor.

[0038] The display unit (150) displays the interpreted potential level as voltage.

[0039] The communication unit (160) can transmit the interpreted potential level to the outside via a wire or convert it into a wireless signal and transmit it wirelessly to an external device.

[0040] The power supply unit (170) supplies power necessary for the overall operation of the device.

[0041] FIG. 2 is a diagram showing the detailed configuration of an antenna section according to an embodiment of the present invention.

[0042] Referring to FIG. 2, the antenna section (110) according to an embodiment of the present invention may include a plurality of branch line antennas (114).

[0043] Multiple branch antennas (114) may have an octopus-style or duck-style form.

[0044] The antenna section (110) may include a plate (112), a plurality of branch antennas (114) and an excitation core (116).

[0045] The plate (112) receives the electromotive force excited in the excitation core (116) through a plurality of branch line antennas (114) and can have a certain area. The plate (112) can be formed of a metal material.

[0046] Multiple branch antennas (114) can be electrically connected to the excitation core (116).

[0047] Here, the core (116) can be excited by an electromotive force from the electric field of the transformer (102).

[0048] FIG. 3 is a diagram showing an example in which a wireless non-contact voltage measuring device according to an embodiment of the present invention includes a hazardous substance detection unit. FIG. 4 is a diagram showing an example of the configuration of a hazardous substance detection unit according to an embodiment of the present invention.

[0049] Referring to FIG. 3, a wireless non-contact voltage measuring device (100) according to an embodiment of the present invention may further include a harmful substance detection unit (180) that detects harmful substances present around a transformer (102).

[0050] The hazardous substance detection unit (180) can be arranged in an array form within the wireless non-contact voltage measuring device (100) to form a unit cell.

[0051] Referring to FIG. 4, the hazardous substance detection unit (180) may include a source electrode (14) and a drain electrode (15) spaced apart from each other; a detection film (19) which is a channel between the source electrode and the drain electrode; and a gate electrode (11) spaced apart from the detection film.

[0052] The harmful substance detection unit (180) may further include a receptor (195) that is attached to the detection film (19) and can combine with the harmful substance (20).

[0053] The receptor (195) can be attached to the sensing membrane (19) by means of a functional group. The receptor (195) may be one or more selected from the group consisting of, for example, enzyme substrates, ligands, amino acids, peptides, aptamers, guanines, proteins, nucleic acids, lipids, and carbohydrates.

[0054] Meanwhile, the functional group may be at least one selected from the group consisting of, for example, amine groups, carboxyl groups, thiol groups, and lipids.

[0055] Additionally, the harmful substance (20) may be at least one selected from the group consisting of, for example, proteins, aptamers, peptides, nucleic acids, oligosaccharides, amino acids, carbohydrates, dissolved gases, sulfur oxide gases, nitrogen oxide gases, Na, K or their ions, residual pesticides, heavy metals and environmental harmful substances.

[0056] The sensing membrane (19) may be made of a material whose resistance can be varied depending on the receptor (195) and the harmful substance (20) combined therewith.

[0057] The material of the sensing film (19) may include, for example, carbon nanotubes (CNT), graphene, molybdenum disulfide (MoS2), or phosphorene.

[0058] Meanwhile, in the harmful substance detection unit (180) according to a modified embodiment of the present invention, the detection film (19) may be made of a material that can react directly with the harmful substance (20) described above without interposing a receptor (195) and whose resistance can be varied.

[0059] The gate electrode (11) may be positioned at a lower level than the source electrode (14), drain electrode (15), and sensing film (19). That is, the level at which the gate electrode (11) is located is lower than the level at which the source electrode (14), drain electrode (15), and sensing film (19) are located. In this specification, the term "level" is used to distinguish the upper and lower positional relationships in the cross-section illustrated in FIG. 4.

[0060] Meanwhile, a hazardous substance detection unit (180) according to one embodiment of the present invention may further include an upper substrate (13) disposed as an insulating member between a detection film (19) and a gate electrode (11). The upper substrate (13) may, for example, have the form of an insulating film or an insulating substrate.

[0061] In order to improve the adhesion between the upper substrate (13) and the sensing film (19), the surface of the upper substrate (13) may be plasma treated.

[0062] In addition, a buffer layer (not shown) for improving adhesion may be placed between the upper substrate (13) and the sensing film (19).

[0063] Meanwhile, in the upper layer, drain wiring (155) electrically connected to the drain electrode (15) may be arranged spaced apart from each other while extending parallel in the first direction.

[0064] In the lower layer where the gate electrodes (11) are arranged, source wiring (145) electrically connected to the source electrode (14) can be arranged spaced apart from each other while extending parallel in a second direction.

[0065] The first direction and the second direction are not parallel to each other, and for example, they may be perpendicular to each other.

[0066] The gate electrodes (11) can be commonly connected, and the drain wires (155) or source wires (145) can each be commonly connected.

[0067] The harmful substance detection unit (180) according to one embodiment of the present invention described above can be used as a testing device for disease diagnosis in addition to detecting harmful substances. Furthermore, depending on the type of detection membrane and receptor, it can also be utilized as a detection device that uses an immune reaction between an antigen and an antibody. In this case, since electrical measurement results are utilized, complex procedures are not required during the analysis process, the device for analysis is relatively inexpensive, and the analysis time is not long, which is an advantage.

[0068] Meanwhile, the configuration of FIG. 4 can be expanded to provide a plurality of unit cells per substrate (10, 13). For example, if the size of the unit cell is further reduced to a nano size, the number of unit cells on the substrate (10, 13) can be increased, for example, to 96, 384, 1536, 6144, 24576, 98304, 393216, etc. In this way, by increasing the number of unit cells per substrate, the hazardous substance detection unit (180) of the present invention can detect various hazardous substances, and the measurement cost can be drastically reduced due to the reduction in detection time.

[0069] A harmful substance detection unit (180) according to an embodiment of the present invention can prepare a lower structure having source wiring (145) and a gate electrode (11) formed on a lower substrate (10), prepare an upper structure having drain wiring (155) formed on an upper substrate (13), and then laminate and bond the upper structure on the lower structure.

[0070] The lower substrate (10) of the lower structure can also serve as a support for the hazardous substance detection unit (180). The upper substrate (13) can also perform the role of insulating the detection film (19) and the gate electrode (11), and can be provided with a through hole (135) to allow a source electrode connection line (142) to pass through for electrically connecting the source electrode (14) and the source wiring (145).

[0071] The upper substrate (13) may be a PCB substrate or a thin film flexible substrate with a thickness of about 0.1 mm, and the lower substrate (10) may be a PCB substrate or a thin film flexible substrate with a thickness of about 1 mm. The hazardous substance detection unit (180) according to one embodiment of the present invention can easily implement a complex gate electrode configuration at a relatively low cost by adopting the above-described dual substrate structure.

[0072] The area in contact with the sensing film (19), such as carbon nanotubes, graphene, molybdenum disulfide, or phosphorene, at the source electrode (14) may have a comb-like shape. With this configuration, the bonding strength or interconnectivity between the sensing film (19) and the source electrode (14) can be improved.

[0073] Likewise, the area in contact with the sensing film, such as carbon nanotubes or graphene, at the drain electrode (15) may have a comb-like shape to improve the adhesion or interconnectivity between the drain electrode and the sensing film.

[0074] The sensing film (19) may include a first sensing film to which a first receptor capable of binding to a first harmful substance can be attached, and a second sensing film to which a second receptor capable of binding to a second harmful substance can be attached.

[0075] The first sensing layer is a channel between the source electrode (14) and the drain electrode (15) shown on the left, and the second sensing layer may be a channel between the source electrode (14) and the drain electrode (15) shown on the right. Although not shown in the drawing, the gate electrode may be positioned at a lower level than the source electrode (14), the drain electrode (15), the first sensing layer, and the second sensing layer.

[0076] The harmful substance detection unit (180) having the above-described multi-channel connection structure can be applied, for example, to a glycosylated protein measurement sensor.

[0077] A first receptor may be disposed on a first sensing membrane. The first receptor, which is a ligand composition, may bind to a glycosylated protein, which is a first harmful substance, and perform the function of attaching the glycosylated protein to the first sensing membrane. This first receptor may include an aromatic boronic acid as an active ingredient, and specifically, may be a substance comprising any one of phenyl boronic acid, naphthalene boronic acid, phenanthrene boronic acid, pyrene boronic acid, and anti-gHSA albumin. The glycosylated protein may be any one of glycated human serum albumin (gHSA), glycosylated IgG, and glycosylated IgM.

[0078] A second receptor may be disposed on the second sensing membrane. The second receptor may bind to the first harmful substance, a glycosylated protein, and the second harmful substance, a protein, and perform the function of attaching the glycosylated protein and the protein to the second sensing membrane. This second receptor may be a substance selected from the group consisting of enzyme substrates, ligands, amino acids, peptides, proteins, nucleic acids, lipids, and carbohydrates, and preferably may be thyroxine. The protein may be any one of human serum albumin (HSA), IgG, and IgM.

[0079] The glycosylated protein can bind to the first receptor, which is a ligand composition, and attach to the first sensing membrane, thereby causing a change in the current value flowing through the first sensing membrane. That is, the first sensing membrane can be connected to the glycosylated protein via the first receptor, thereby inducing a change in current in the first sensing membrane. Additionally, the protein and the glycosylated protein can bind to the second receptor and attach to the second sensing membrane, thereby causing a change in the current value flowing through the second sensing membrane. Therefore, the amount of current flowing through the first or second sensing membrane can change depending on the amount of the glycosylated protein or the protein included.

[0080] To explain the hazardous substance detection unit (180) having a multi-channel connection structure, a 2-channel structure has been described as an example, but the technical concept of the present invention is not limited thereto and can be extended to a 3-channel, 4-channel, 5-channel, and even 20-channel structure.

[0081] FIG. 5 is a diagram showing an operation flowchart to explain a wireless non-contact voltage measurement method according to an embodiment of the present invention.

[0082] Referring to FIG. 5, in the wireless non-contact voltage measurement method according to an embodiment of the present invention, first, an electromotive force from a power transformer (102) is excited in the antenna part (110) to generate a voltage (S510).

[0083] That is, when the antenna part (110) moves into the electric field of the power transformer (102), the electromotive force is excited by the electric field and a voltage is generated.

[0084] At this time, the detection amplifier (120) rectifies and amplifies the generated voltage.

[0085] In the antenna section (110), an electromotive force is excited in the excitation core (116) by an electric field according to the electric field strength of the power transformer (102), and a voltage is generated, and the generated voltage is transmitted to a plate (112) having a certain area through a plurality of branch line antennas (114).

[0086] Next, the wireless non-contact voltage measuring device (100) converts the electromotive force voltage excited in the antenna part (110) into a digital signal through the digital conversion part (130) (S520).

[0087] That is, the digital conversion unit (130) converts the rectified and amplified analog voltage into a digital signal.

[0088] Next, the wireless non-contact voltage measuring device (100) analyzes the digital signal and displays the corresponding voltage (S530).

[0089] That is, the voltage analysis unit (140) analyzes the potential level for the converted digital signal and transmits to the display unit (150) how many volts (V) the corresponding voltage is.

[0090] Next, the display unit (150) displays the interpreted potential level as the corresponding voltage.

[0091] Meanwhile, the wireless non-contact voltage measuring device (100) can detect harmful substances present around the power transformer (102) through the harmful substance detection unit (180) (f).

[0092] At this time, the harmful substance detection unit (180) detects the harmful substance through the detection membrane (19), and a plurality of receptors (195) to which the harmful substance binds may be formed on the detection membrane (19).

[0093] A protein or glycosylated protein corresponding to a harmful substance is attached to a plurality of receptors (195), and the harmful substance detection unit (180) is connected to the protein or glycosylated protein attached to the plurality of receptors (195) and the detection membrane (19), so that when a change in current is induced in the detection membrane (19) and the change in current is above a certain level, it can be recognized that a harmful substance has been detected.

[0094] Meanwhile, the hazardous substance detection unit (180) may have a structure forming a thin-film transistor to detect hazardous substances. The hazardous substance detection unit (180) comprises: a substrate; a lower gate electrode on the substrate; a first insulating layer on the substrate and the lower gate electrode; an active layer on the first insulating layer and including a source region, a channel region, and a drain region; a second insulating layer on the active layer; an upper gate electrode on the second insulating layer; a third insulating layer on the second insulating layer and the upper gate electrode; a source electrode and a drain electrode on the third insulating layer and in contact with the source region and the drain region, respectively; a fourth insulating layer on the third insulating layer, the source electrode, and the drain electrode; a first electrode and a pixel defining film on the fourth insulating layer; a light-emitting layer on the first electrode; and a second electrode on the light-emitting layer and the pixel defining film. The first electrode may be an anode electrode and the second electrode may be a cathode electrode. Additionally, the first electrode may be a cathode electrode and the second electrode may be an anode electrode.

[0095] Additionally, the hazardous substance detection unit (180) may have a source electrode electrically connected to a microprocessor, a detection electrode electrically connected to an upper gate electrode, an ion detection film that detects ions in contact with the detection electrode, and a reaction electrode that reacts with ions upon contact with hazardous substances electrically connected to the ion detection film. Here, the detection electrodes may be connected to the lower gate electrode and the upper gate electrode, respectively, to form a dual-gate ion detection sensor.

[0096] In addition, in the hazardous substance detection unit (180), the ion detection film detects that the reaction electrode reacts with hazardous substances in the air, and the detection electrode can apply a voltage according to the ion reaction of the ion detection film to the lower gate electrode and the upper gate electrode.

[0097] Additionally, as voltage is applied to the lower gate electrode and the upper gate electrode, the source electrode and the drain electrode forming the thin-film transistor are energized, and current flows from the drain electrode to the source electrode, and power is applied from the first electrode through the light-emitting layer to the second electrode, causing the light-emitting layer to emit light, and current is applied from the source electrode to the control unit, so that the control unit can recognize harmful substance detection data. The control unit can notify the display unit (150) or the user terminal that harmful substances have been detected.

[0098] Accordingly, the wireless non-contact voltage measuring device (100) can detect harmful substances through the harmful substance detection unit (180), thereby causing a portion of the light-emitting layer of the display unit (150) to light up automatically, so that a worker or user can recognize that harmful substances have been detected in the air where they are located.

[0099] In addition, when a hazardous substance is detected by the hazardous substance detection unit (180), the detection signal is provided to the display unit (150) or to the user terminal and the designated worker terminal through the communication unit (160), thereby allowing the user, worker, and other personnel to recognize that hazardous substances are present in the air at the location where the power transformer (102) is located.

[0100] A lower gate electrode is formed on a substrate in the same layer as the gate line using the same material and is covered by a first insulating layer. In this case, the first insulating layer may be referred to as a lower gate insulating layer. The lower gate electrode may be a semiconductor such as silicon (Si) or a conductive metal, for example, one or more alloys of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or a multilayer thereof. The first insulating layer may be composed of a single layer or multiple layers made of an inorganic insulating material, and may be made of silicon oxide (SiOx), silicon nitride (SiNx), etc.

[0101] The active layer is provided on the first insulating layer in a pre-set pattern shape so as to overlap with the lower gate electrode. The active layer includes a channel region overlapping with the upper gate electrode where carriers move, a source region in contact with the source electrode, and a drain region in contact with the drain electrode. The active layer may be composed of a semiconductor material consisting of any one of amorphous silicon, polycrystalline silicon, oxide, and organic material, but is not limited thereto.

[0102] A second insulating layer is provided on the front surface of the substrate to cover the active layer on the substrate. The second insulating layer insulates the active layer and the upper gate electrode to be provided on the second insulating layer. In this case, the second insulating layer may be referred to as a lower gate insulating layer. The second insulating layer may be composed of a single layer or multiple layers made of an inorganic insulating material, and may be made of silicon oxide (SiOx), silicon nitride (SiNx), etc.

[0103] The upper gate electrode is provided in a form that overlaps with the channel region of the active layer on the second insulating layer. Additionally, the upper gate electrode may also overlap with the lower gate electrode to strengthen the electric field between the gate electrode and the active layer. The cross-sectional view of the thin-film transistor (DT) is a cross-section along the length direction of the active layer, that is, in the direction in which carriers move from the source region to the drain region. Accordingly, the lower gate electrode is provided in a form shorter than the length of the upper gate electrode or the channel region of the active layer.

[0104] A third insulating layer is provided on the front surface of the substrate to cover the upper gate electrode on the substrate. The third insulating layer insulates the upper gate electrode and the source electrode and drain electrode to be provided on the third insulating layer. The third insulating layer is formed from one of an inorganic insulating material including silicon oxide (SiOx) and silicon nitride (SiNx), or an organic insulating material including photoacryl and benzocyclobutene.

[0105] The source electrode contacts the source region of the active layer and can be formed of the same material on the same layer as the data line (DL) and the driving power line (DPL).

[0106] The drain electrode is spaced apart from the source electrode and contacts the drain region of the active layer, and is formed together with the source electrode on the same layer using the same material.

[0107] The source electrode and the drain electrode may be any one of a semiconductor such as silicon (Si) or a conductive metal, for example, molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy of two or more of these, or a multilayer thereof.

[0108] Among the methods for contacting the source electrode and drain electrode with the active layer, there is a method of contacting them with the upper surface of the active layer; however, this method may make it difficult to align the electrodes with the target area. Therefore, the source electrode and drain electrode may contact the side of the source and drain regions of the active layer, respectively, rather than the upper surface.

[0109] The lower gate electrode, active layer, upper gate electrode, source electrode, drain electrode, and insulating layer between the electrodes are components that constitute a thin-film transistor. The performance of the thin-film transistor is determined by the design specifications of the components. S-factor (subthreshold slope), which is one of the values ​​determining the performance of the thin-film transistor, is a value indicating how quickly voltage can be charged to a pixel. It represents the slope in the On-OFF section where the driving current increases rapidly when the gate voltage exceeds the threshold voltage in the driving current graph according to the gate voltage. As the display panel of the display unit (150) becomes higher in resolution, the size of the driving element decreases, and thus the maximum current flowing through a single subpixel also decreases. Consequently, the range of data voltage that can be used to express gradation decreases, making it difficult to express gradation. Therefore, by increasing the S-factor to reduce the slope of the driving current graph according to the gate voltage, the range of data voltage increases, allowing for the expression of more finely detailed gradation.

[0110] In electroluminescent display panels using organic light-emitting diodes or inorganic light-emitting diodes, the performance of the thin-film transistor improves as the S-factor increases. In particular, for display panels using micro LEDs as light-emitting diodes, the S-factor must satisfy at least 0.3 to enable sufficiently fine grayscale expression. Furthermore, since the S-factor is a value determined by the capacitance between the lower gate electrode and the active layer, and the capacitance between the active layer and the upper gate electrode, it can be achieved by appropriately adjusting the thicknesses of the first insulating layer and the second insulating layer.

[0111] A fourth insulating layer is provided over the entire front surface of the substrate to cover the pixel circuit on the source electrode and drain electrode. The fourth insulating layer can provide a flat surface while protecting the pixel circuit. The fourth insulating layer may be made of an inorganic insulating material including silicon oxide (SiOx) and silicon nitride (SiNx), or an organic insulating material such as benzocyclobutene or photoacrylic. Depending on the case, the fourth insulating layer may separately provide a protective layer that protects the pixel circuit and a flat layer that flattens the step difference of the pixel circuit.

[0112] The LED element emits light through the current flowing from the pixel circuit to the common power line (CPL) by being electrically connected to the pixel circuit and the common power line (CPL). The first electrode is provided on the fourth insulating layer as the anode electrode of the LED element connected to the drain electrode of the driving transistor (DT). The driving element represents the case where there is no thin-film transistor controlling the light emission of the LED element between the LED element and the driving transistor (DT). The first electrode may be provided in contact with the drain electrode of the thin-film transistor. The first electrode may be made of a transparent conductive material when the display panel is a front-emitting type, and may be made of a light-reflecting conductive material when the display panel is a back-emitting type. The transparent conductive material may be ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide), but is not limited thereto. The light-reflecting conductive material may be Al, Ag, Au, Pt, or Cu, but is not limited thereto. A pixel electrode made of a light-reflecting conductive material may be composed of a single layer containing a light-reflecting conductive material or a multilayer in which single layers are stacked.

[0113] In addition, the wireless non-contact voltage measuring device (100) according to an embodiment of the present invention may further include an air pollution level detection unit for detecting air pollution levels.

[0114] The air pollution detection unit detects the air pollution level at the location where the worker is situated. When the worker is located within a specific building, the air pollution detection unit may consist of an external detection module that detects the pollution level of the outside air and an internal detection module that detects the air pollution level inside the building. The internal detection module is installed in each area equipped with an internal air purifier and a heating / cooling unit; by being installed in a space spaced apart from the air purifier, it can detect the average air pollution level for each zone rather than detecting the purified air around the purifier. This air pollution detection unit is primarily installed within buildings where people are located to detect the pollution level of the air that people mainly come into contact with, enabling the control unit to control the operation of the air purifier and heating / cooling unit accordingly.

[0115] In addition, the air pollution detection unit includes a temperature sensor and measures the indoor temperature through the temperature sensor. The control unit can operate the air conditioner by comparing the measured temperature sensor value with the seasonal indoor appropriate temperature stored in the storage unit to control the temperature of the air discharged by the air conditioner. For example, if the current indoor temperature is 19 degrees (°C) and the appropriate indoor temperature for the corresponding date is 23 degrees (°C), the control unit controls the operation of the air conditioner so that air with a temperature of 23 degrees (°C) or higher is discharged, thereby allowing the air to circulate inside the building along with purified air and providing people with an appropriate indoor temperature, thereby enabling more comfortable use of the building.

[0116] Meanwhile, the wireless non-contact voltage measuring device (100) according to an embodiment of the present invention may include a voice signal processing unit and an image signal processing unit.

[0117] The voice signal processing unit modulates and demodulates the voice signal received from the internal line connecting the control unit and the content playback unit and outputs it through the speaker, and modulates and demodulates the voice signal received from the microphone and transmits it to the control unit and the content playback unit to output the voice signal.

[0118] The video signal processing unit processes the camera video signal between the control unit and the camera by encoding / decoding and displays it through the display unit (150).

[0119] In addition, the video signal processing unit controls the transmission capacity of the video signal so that excessive traffic is not generated on the communication channel due to the large volume of video signals received in real time when transmitting the video signal received from the outside to the control unit via Bluetooth.

[0120] To this end, the video signal processing unit includes a frame editing module that stores an edited video composed of some frames with the clearest image among the frames per second of the video signal (for example, 3-5 frames with the clearest image among 20 frames per second) so that the video signal has a transmission capacity suitable for the maximum data transmission speed of the current state of the communication channel calculated by the transmission speed calculation unit.

[0121] Here, the frame editing module may include a frame editing algorithm comprising the steps of: dividing the video signal of the wireless non-contact voltage measuring device (100) into individual frames (e.g., 20 frames per second); extracting branching, bending, curvature, and shading lines of the shape for the frames; deleting the frames from which the branching, bending, curvature, and shading lines of the shape were extracted; and selecting and saving some frames (e.g., 3-5 frames per second) from among the frames that were not deleted, in which the image appears most clearly.

[0122] Therefore, since the number of video signal frames is reduced by the frame editing module, the transmission capacity of the video signal that needs to be sent to the control unit via Bluetooth becomes smaller.

[0123] Here, the number of frames selected by the frame editing module according to the transmission capacity of the video signal is calculated as follows.

[0124] For example, if the maximum data transmission speed of Bluetooth calculated by the transmission speed calculation unit is 723 kbps, and among these, the transmission speed of the voice signal is 64 kbps and the data transmission speed of the video signal is 550 kbps, then in order to transmit a normal video signal at the transmission speed of the video signal of 550 kbps, the transmission capacity per second of the video signal must be calculated.

[0125] Accordingly, the transmission capacity per second of the video signal is calculated using the transmission capacity formula (video bitrate / 8 (converted to Bytes)) playback time (second), so (550,000 / 8) (second) = 68.8 kbytes.

[0126] Accordingly, the number of frames per second of the video signal, for example, 3 to 5 frames per second, is selected so that the transmission capacity per second of the video signal is 68.8 kbytes or less.

[0127] Therefore, when transmitting video and audio signals simultaneously using Bluetooth, normal transmission is possible without transmission delay or loss of video and audio signals at a transmission speed of 614 kbps, which is the sum of the transmission speed of the video signal of 550 kbps and the transmission speed of the audio signal of 64 kbps.

[0128] Since the video signal displayed by the display unit (150) consists of, for example, 3 to 5 frames per second, the movement of the video is not displayed continuously, that is, smoothly, but it is possible to prevent excessive traffic from occurring during the transmission of the video signal and there is no difficulty in understanding the information of the video (information of the subject being filmed).

[0129] Meanwhile, the video signal processing unit further includes a change image detection module and a background image detection module to increase the number of frames per second (e.g., 6-10 frames per second) compared to the number of frames selected by the frame editing module, in order to compensate for the fact that the movement of the video (3-5 frames per second) selected and transmitted by the frame editing module is not continuously and smoothly displayed, and to enable normal data transmission even if excessive traffic occurs in the communication channel during data transmission (e.g., when the current transmission speed is below the minimum data transmission speed), while ensuring that the video signal has a transmission capacity smaller than the transmission capacity suitable for the minimum transmission speed calculated by the transmission speed calculation unit.

[0130] The change image detection module includes a change image detection algorithm comprising: a step of sequentially comparing frames per second of the image signal and examining the entire area of ​​the frame to extract only the change area so that the image signal has a transmission capacity value smaller than the transmission capacity suitable for the minimum transmission speed calculated by the transmission speed calculation unit; a preprocessing / binaryization step of performing preprocessing and binaryization on the change area; and a step of removing noise from the preprocessed and binaryized frame and using area analysis to select and store the change image at a fixed number of frames (e.g., 6-10 frames per second). The number of frames per second of the change image detected by the change image detection algorithm (e.g., 6-10 frames) follows the image signal transmission capacity calculation formula in the frame editing module.

[0131] In addition, the background image detection module includes a background image detection algorithm that detects an unchanged area, i.e., a background image, as one frame among the frames detected by the change image detection module.

[0132] Therefore, the change image detected by the change image detection module has a smaller size than the original video signal frame and, since it is calculated based on the transmission capacity according to the minimum transmission speed, it has a smaller transmission capacity than the video signal selected by the frame editing module, so it is possible to reduce the communication channel occupancy rate associated with the transmission of the video signal while having more frames than the number of frames selected by the frame editing module.

[0133] In addition, since the number of frames increases, if the change image frame of the change image detection module is captured or overlapped with the background image frame detected by the background image detection module, the movement can be displayed more smoothly than the video signal selected and transmitted by the frame editing module as described above.

[0134] Meanwhile, an antenna section according to another embodiment of the present invention may include an antenna, an insulating protective cover, a feedthrough and a balun, a cavity and a connection terminal.

[0135] The antenna forms the main body of the electromagnetic wave detection system and is manufactured in a shape based on a metal plate (Log Periodic or Spiral) to be mounted on a supporting insulating plate on the upper surface of the cavity. It is assembled by installing a feedthrough and balun inside the cavity, and the entire unit is attached with an insulating protective cover or molded.

[0136] The cavity supports the antenna and serves to increase sensitivity.

[0137] The insulating protective cover can prevent flashover from the conductor of the GIS and suppress partial discharge that may occur in the antenna, and enables the improvement of receiving sensitivity and adjustment of the antenna size through the dielectric constant characteristics of the dielectric. Insulating materials used for the insulating protective cover include epoxy and polyethylene fluoride, which are materials with low tan values ​​that improve antenna sensitivity through the dielectric effect and suppress the occurrence of partial discharge within themselves.

[0138] The feedthrough is the connection path from the antenna to the terminal, and a balun is inserted before the terminal connection. The balun serves to perform impedance matching between the antenna and the feedthrough using a measurement cable, ensuring that the antenna's balanced circuit is properly matched to the cable's unbalanced circuit.

[0139] In order to use the antenna unit equipped with the insulating protective cover of the present invention for diagnosing power equipment such as GIS, first, the front surface of the device of the present invention is aligned with the inner surface of the tank inside the handhole or manhole of the power equipment such as GIS. Then, a device capable of measuring partial discharge and applied voltage phase is connected to the terminal.

[0140] Under the above conditions, if an abnormality occurs inside a power device such as a GIS and partial discharge occurs, electromagnetic waves propagate inside the tank.

[0141] In this way, when electromagnetic waves propagate inside the tank, the electromagnetic waves are excited in the antenna section and received by the antenna, and at the same time, the 60Hz commercial frequency voltage applied to the GIS conductor induces electrostatic charge on the antenna surface. At this time, the received electromagnetic waves and the electrostatically induced 60Hz commercial frequency voltage flow through the terminal toward the measuring device.

[0142] In this way, when transmitted to an external measuring device through an antenna, the 60Hz commercial frequency current is amplified by a factor of two in the balun and flows through a low-pass filter to the applied voltage phase measuring section so that the magnitude and phase of the 60Hz commercial frequency voltage are measured, and the electromagnetic waves caused by partial discharge flow through the low-pass filter to the partial discharge measuring section so that the magnitude and frequency characteristics of the partial discharge are measured.

[0143] Therefore, the magnitude and phase of the measured partial discharge electromagnetic waves and voltage are displayed, and the operator determines whether there is an abnormality in the power equipment based on these.

[0144] In addition, in a series of measurement processes as described above, if two or more antennas are placed close to the power equipment tank and partial discharge electromagnetic waves are detected simultaneously at two or more locations, it is possible to estimate the abnormal parts inside the power equipment.

[0145] Meanwhile, the antenna portion according to the embodiment of the present invention may have other configurations. For example, the plate of the receiver antenna may not be housed in the receiver case but may be located outside the receiver case.

[0146] Furthermore, the receiver coil used can also be varied. For example, the receiver coil may be composed of Litz wire. In one such embodiment, the Litz wire is 40 AWG, 3-strand Litz wire. The resulting receiver coil has more than 300 turns and a Q-factor of 60. The operating frequency of the receiver coil is 1 to 2 MHz, and the inductance of the receiver coil is 3 mH. The diameter of the receiver coil is approximately 4 inches (12 cm). The receiver coil is placed between two plates, and in this orientation, the magnetic field generated by the receiver coil will dissipate a small amount of available power from the receiver because it generates a lossy circular current in the plates. In another embodiment, the wire (Litz wire or insulated solid copper wire) used to manufacture the receiver coil may be wound around a non-conductive material to match the number of turns of the receiver coil.

[0147] In another embodiment, 48 AWG, 50-strand Litz wire may be used for the receiver coil. The number of turns is 300 or more, the frequency is 1 MHz, and the inductance is 3 mH. The diameter of the receiver coil is 4 inches (12 cm) in this case as well. In another embodiment, 48 AWG, 675-strand Litz wire may be used for the receiver coil. The number of turns is 75 or more, the frequency is 2 MHz, and the inductance is 750 H. The diameter of the receiver coil is 4 inches (12 cm) in this case as well. Of course, a person skilled in the art will understand that the number of turns, gauge, number of strands, and wire type can be varied as long as the receiver coil resonates at the required frequency.

[0148] In another embodiment, the receiver coil may be replaced with a ferrite core inductor. The inductors are each 10 millimeters long and are therefore smaller than the receiver coil. The Q-factor of the small inductor set is 60 and the frequency is 2 MHz. The inductors are designed to operate at higher frequencies and have a high quality factor and a high inductance value of 50 H or higher.

[0149] The shape of the receiver coil can also be varied. For example, a toroidal receiver coil or a flat spiral receiver coil can be used.

[0150] In another embodiment, the receiver antenna may include rails instead of plates. The rails are attached to a material with a low dielectric constant and are positioned in the same plane. Thus, the receiver antenna is flat overall and can be easily integrated into a device. The rails do not need to be exactly parallel to each other.

[0151] As described above, according to the present invention, a wireless non-contact voltage measuring device and method can be realized to measure the voltage supplied from a power transformer installed in a transmission line of a substation, a substation facility, an industrial site, a building, etc., in a wireless non-contact manner.

[0152] Although the present invention has been described above with reference to embodiments, various changes and modifications can be made by those skilled in the art to which the present invention pertains. Such changes and modifications are considered to be within the scope of the present invention as long as they do not depart from the scope of the technical concept provided by the present invention. Accordingly, the scope of rights of the present invention should be determined by the claims set forth below. Explanation of the symbols

[0153] 100: Wireless non-contact voltage measuring device 102: Power transformer 110: Antenna part 112: Plate 114 : Branch line antenna 116 : Excitation core 120: Detector amplifier 130: Digital converter 140: Voltage analysis unit 150: Display unit 160 : Communications unit 170 : Power supply unit 180: Hazardous substance detection unit

Claims

Claim 1 A wireless non-contact voltage measuring device comprising: an antenna unit that is spaced apart from a transformer at a certain distance and generates a voltage by exciting an electromotive force by the electric field when moving into the electric field of the transformer; a detection amplifier that rectifies and amplifies the generated voltage; a digital converter that converts the rectified and amplified voltage into a digital signal; a voltage analysis unit that analyzes a potential level for the converted digital signal; and a display unit that displays the analyzed potential level as a voltage, wherein the antenna unit includes a plurality of ground wire antennas, and the plurality of ground wire antennas have an octopus-type or duck-type configuration. Claim 2 delete Claim 3 A wireless non-contact voltage measuring device according to claim 1, wherein the antenna portion comprises: an excitation core in which an electromotive force is excited by an electric field from the transformer; a plurality of branch antennas electrically connected to the excitation core; and a plate having a certain area that receives the electromotive force excited in the excitation core through the plurality of branch antennas. Claim 4 A wireless non-contact voltage measuring device according to claim 1, further comprising a hazardous substance detection unit for detecting hazardous substances present around the transformer. Claim 5 In claim 4, the hazardous substance detection unit comprises: a unit cell including a source electrode and a drain electrode spaced apart from each other, a detection film which is a channel between the source electrode and the drain electrode, and a gate electrode spaced apart from the detection film; an upper substrate on which the source electrode, the drain electrode, and the detection film are formed; and a lower substrate on which the gate electrode is formed, wherein the upper substrate and the lower substrate are stacked and coupled vertically, wherein drain wiring electrically connected to the drain electrode is spaced apart from each other while extending parallel in a first direction on the upper substrate, and source wiring electrically connected to the source electrode is spaced apart from each other while extending parallel in a second direction that is not parallel to the first direction on the lower substrate, and a receptor that binds to the hazardous substance is formed on the detection film, a wireless non-contact voltage measuring device. Claim 6 A wireless non-contact voltage measurement method for a measuring device that is spaced apart from a transformer at a certain distance and includes an antenna section, a detection amplifier, a digital converter, a voltage analysis section, a hazardous substance detection section, and a display section, comprising: (a) a step in which an electromotive force is excited by the electric field when the antenna section moves into the electric field of the transformer, thereby generating a voltage in the antenna section; (b) a step in which the detection amplifier rectifies and amplifies the generated voltage; (c) a step in which the digital converter converts the rectified and amplified voltage into a digital signal; (d) a step in which the voltage analysis section analyzes the potential level for the converted digital signal; and (e) a step in which the display section displays the analyzed potential level as a voltage; wherein the antenna section includes a plurality of branch line antennas, and the plurality of branch line antennas have an octopus-type or duck-type configuration. Claim 7 In claim 6, the antenna portion in step (a) generates an electromotive force in the excitation core by an electric field according to the electric field strength of the transformer, and the generated voltage is transmitted to a plate having a certain area through the plurality of branch line antennas, in a wireless non-contact voltage measurement method. Claim 8 A wireless non-contact voltage measurement method according to claim 6, further comprising the step of the hazardous substance detection unit detecting hazardous substances present around the transformer. Claim 9 In claim 8, the step of detecting the harmful substance is to detect the harmful substance through a detection membrane, and a plurality of receptors to which the harmful substance binds are formed on the detection membrane, a wireless non-contact voltage measurement method. Claim 10 In claim 9, the step of detecting the harmful substance comprises attaching a protein or glycated protein corresponding to the harmful substance to the plurality of receptors, connecting the protein or glycated protein attached to the plurality of receptors to the sensing membrane, and recognizing that the harmful substance has been detected when the change in current is greater than a certain level as a change in current is induced in the sensing membrane.

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