Nose control system and hot-dip galvanizing apparatus including same

Abstract

Provided is a nose control system including: a nose device in which one end of a steel sheet is immersed in a plating bath containing a hot-dip galvanizing liquid for plating the steel sheet, for introducing the steel sheet into the plating bath during production of the hot-dip galvanized steel sheet; a first sensor that is formed on a portion of the plating bath and that can measure a first water level of molten steel of the hot-dip galvanizing liquid; and a processor that controls the nasal device and the first sensor.

Description

Technical Field

[0001] The present invention relates to a nose control system and a hot-dip galvanizing device including the same, and more particularly to a nose control system capable of automatically removing scum floating in nose equipment during the production of hot-dip galvanized steel sheets and a hot-dip galvanizing device including the same. Background Art

[0002] The hot-dip galvanizing apparatus is a molten metal apparatus that coats a zinc coating on the surface of a high-temperature steel sheet by melting a zinc ingot into a high-temperature molten state of 450 degrees or more. In the hot-dip galvanizing apparatus, dross having a Fe2Al structure (i.e., an intermetallic compound) always occurs due to the temperature difference with the ambient air and thermal instability and chemical instability, such as zinc oxidation caused by contact with the discharged wiping air of an air knife (which flows on the molten metal surface after colliding with the vertical strip surface). In particular, although various alloy element components (such as aluminum, manganese, and silicon) are added to improve the corrosion resistance of the plated steel sheet, improve the surface quality, etc., the amount of dross generated is greatly increased due to external factors (temperature difference, oxidation with contact with wiping gas, etc.).

[0003] Such dross is adsorbed on the surface of the steel sheet, and may cause various problems during the secondary processing, such as processing cracks, coating peeling, coating performance deterioration, etc. In particular, in order to supply plated steel sheets for covering plates of vehicles, dross needs to be managed more strictly. In many steel companies, even from the perspective of emission management, a lot of research has been conducted to minimize the generation of dross, by introducing a device with a baffle structure into the nose (one end of which is immersed in the galvanizing bath and the steel sheet is introduced), ensuring the thermal stability and chemical stability of the galvanizing bath, thereby preventing dross defects, and preventing foreign matter such as ash (ZnO oxidized matter) defects in addition to dross and preventing floating matter (including foreign matter and dross) on the surface of the molten metal from being adsorbed onto the steel sheet.

[0004] Typically, many steel companies use a nose control system that removes dross floating in the nose equipment by using a baffle-like structure and a metal pump device in the vent pipe part of the nose equipment to discharge the dross over the baffle to the back of the galvanizing bath.

[0005] The background art of the present invention is disclosed in Korean Patent Application Publication No. 10-2014-0085175. Summary of the invention

[0006] [Technical issues]

[0007] However, such a conventional nose control system and a hot dip galvanizing apparatus including the same have a problem in that there is a defect due to the adhesion of foreign matter to the steel plate caused by the following situations that often occur: the barrier is completely filled because the liquid level of the galvanizing bath is too high during operation, or the foreign matter such as dross is not discharged to the outside of the barrier because the liquid level of the galvanizing bath is too low. In addition, due to such problems, there is a problem that it is difficult for workers to handle dross management unless the workers monitor the barrier management in the nose device in real time according to the real-time change of the molten metal liquid level of the galvanizing bath, for example, the workers often manually check and manage the current barrier management situation in the nose device.

[0008] In addition, the vent pipe part connected to the nose device is integrally manufactured by welding a baffle thereto. In this case, it is necessary to cut the steel plate to replace the vent pipe part, and thus there is a productivity problem due to an increase in the maintenance time of the device. In addition, there is a structural problem that it is difficult to properly process the surface of the baffle. Therefore, an object is to provide a nose control system capable of ensuring work convenience and quality stability and a hot-dip galvanizing device including the same, which applies a detachable baffle according to real-time changes in the molten metal level of a galvanizing bath, and overcomes the above-mentioned problems by automatically controlling the load of the detachable baffle and the pump unit based on the molten metal level using a machine vision camera and a sensor.

[0009] Furthermore, an object of the present invention is to provide a nasal control system and method capable of ensuring working convenience and quality stability by automatically analyzing the current working status within the nasal device in real time.

[0010] The objectives to be achieved by the present invention are not limited to the above objectives, and those skilled in the art can clearly understand other objectives not described above from the following description.

[0011] [Technical solution]

[0012] A nose control system according to one aspect of the present invention includes: a nose device configured to immerse one end thereof in a plating bath containing a hot-dip galvanizing solution during production of a steel sheet and introduce the steel sheet into the plating bath, wherein the hot-dip galvanizing solution is used to plate the hot-dip galvanized steel sheet; a first sensor arranged at any part of the plating bath and capable of measuring a first water level of a bath surface of the hot-dip galvanizing solution; and a processor configured to control the nose device and the first sensor. The nose device includes: a vent pipe member configured to surround a steel plate introduced into a plating bath and guide the steel plate so that the steel plate is introduced into a hot-dip galvanizing solution contained in the plating bath through an opening formed at a bottom of the vent pipe member, the opening being immersed in a bath surface of the plating bath; a stopper unit physically coupled to an outer wall portion of the vent pipe member as a detachable structure, capable of being driven along the outer wall of the vent pipe member based on information of a first water level of a bath surface of the hot-dip galvanizing solution while operating in linkage with a first sensor, including a first stopper wall portion and a second stopper wall portion, and configured to form a containing space, the first stopper wall portion being spaced apart from the vent pipe member at a predetermined distance The vent pipe component is provided with a first stopper wall portion and a second stopper wall portion, the first stopper wall portion and the second stopper wall portion are spaced apart from each other by a predetermined distance and are exposed to a bath surface of a hot-dip galvanizing liquid, the accommodation space is capable of accommodating a hot-dip galvanizing liquid introduced through an opening between the inner wall portion of the vent pipe component and the first stopper wall portion and then flowing through the first stopper wall portion; and a pump unit is installed outside the vent pipe component and is configured to pump the hot-dip galvanizing liquid accommodated in the accommodation space of the stopper unit to a plating bath. The processor automatically controls the position of the stopper unit based on the difference in the spacing G between the first water level measured by the first sensor and the first stopper wall portion so that the spacing is continuously maintained.

[0013] A nose control system according to another aspect of the present invention includes: a nose device configured to immerse one end portion in a plating bath containing a hot-dip galvanizing solution in a process of producing a steel sheet and introduce the steel sheet into the plating bath, the hot-dip galvanizing solution being used to plate the hot-dip galvanized steel sheet; a first sensor arranged at an arbitrary portion of the plating bath and capable of measuring a first water level of a bath surface of the hot-dip galvanizing solution; and a processor configured to control the nose device and the first sensor. The nose device includes: a stopper unit physically connected to an outer wall portion of a vent pipe component as a detachable structure, capable of being driven along the outer wall of the vent pipe component based on information of the first water level of the bath surface of the hot-dip galvanizing solution while operating in linkage with the first sensor, including a first stopper wall portion and a second stopper wall portion, and configured to form a receiving space, the first stopper wall portion being spaced apart from an inner wall portion of the vent pipe component by a predetermined distance, and being formed along the inner periphery of the vent pipe component so that the first stopper wall portion protrudes at a predetermined height in the opening of the vent pipe component in the height direction of the vent pipe component, the first stopper wall portion protruding at a predetermined height in the opening of the vent pipe component in the height direction of the vent pipe component, the first stopper wall portion protruding at a predetermined height in the opening of the vent pipe component in the height direction of the vent pipe component, the first stopper wall portion protruding at a predetermined height in the opening of the vent pipe component in the height direction of the vent pipe component, the first stopper wall portion protruding at a predetermined height in the opening of the vent pipe component The second stopper wall portion is spaced apart from the first stopper wall portion at a predetermined distance and is exposed to the bath surface of the hot-dip galvanizing liquid, the accommodation space is capable of accommodating the hot-dip galvanizing liquid introduced through the opening between the inner wall portion of the vent pipe component and the first stopper wall portion and then flowing through the first stopper wall portion; a camera module, which is installed in the vent pipe component, arranged at any part of the stopper unit, and is capable of identifying foreign matter floating on the bath surface of the hot-dip galvanizing liquid; and a pump unit, which is installed outside the vent pipe component and is configured to pump the hot-dip galvanizing liquid accommodated in the accommodation space of the stopper unit to the plating bath. The processor controls the position of the stopper unit or adjusts the load of the pump unit based on information obtained by learning the image of the foreign matter using the camera module, so that the moving foreign matter is suppressed from mixing into the steel plate.

[0014] In the present invention, the processor receives a sensing signal from the first sensor, and based on the sensing signal, continuously controls the spacing by raising or lowering the stopper unit so that the depth of the stopper unit immersed in the plating bath can be adjusted, or adjusting the load of the pump unit so that the flow rate of the hot-dip galvanizing liquid pumped by the pump unit can be controlled.

[0015] In the present invention, the processor derives information of a distance G between a protruding portion protruding to the first stopper wall portion and the bath surface of the hot-dip galvanizing liquid by combining information of a first water level of the bath surface of the hot-dip galvanizing liquid obtained via the first sensor with information of a position of the stopper unit, and continuously maintains the distance by controlling the position of the stopper unit based on the deduced information of the distance and information of a load of the pump unit.

[0016] In the present invention, the stopper unit is configured in the form of a slide rail and is physically coupled to the outer wall portion of the vent member. A driving device for driving the stopper unit is connected to any portion of the nose device to minimize the influence of heat energy transferred to the plating bath.

[0017] In the present invention, the processor increases the depth of the first barrier wall portion of the barrier unit immersed in the plating bath by lowering the barrier unit when the spacing information is less than a preset reference, and reduces the depth of the first barrier wall portion of the barrier unit immersed in the plating bath by raising the barrier unit when the spacing information is greater than a preset reference water level.

[0018] In the present invention, the nose device further includes a second sensor which is installed on either side of the internal space of the vent pipe member and is configured to detect information on the position of the stopper unit or measure a second water level of a bath surface of the hot-dip galvanizing liquid flowing through the stopper wall portion and accommodated in the accommodation space of the stopper unit.

[0019] In the present invention, the processor controls the distance between the second water level and the first water level to always have a set value or a larger value through the second sensor, so that the hot-dip galvanizing liquid will not flow back from the accommodation space of the baffle unit to the opening of the vent pipe component.

[0020] In the present invention, the pump unit includes: a casing part, which is installed at a position corresponding to the baffle unit outside the vent pipe component, configured to have a pumping space connected to the accommodating space of the baffle unit so that the pumping space is communicated with the accommodating space, and configured to have an outlet formed on one side thereof so that the hot-dip galvanizing liquid introduced from the accommodating space into the pumping space is discharged into the plating bath; an impeller part, which is rotatably installed in the pumping space of the casing part, and is configured to drive the hot-dip galvanizing liquid introduced into the pumping space to flow toward the outlet through its rotation; and a driving motor, which is installed on one side of the casing part, connected to the rotating shaft of the impeller part, and configured to drive the impeller part to rotate.

[0021] In the present invention, the nose device further includes a gas supply part formed on one side of the camera module and a gas suction part formed on the other side of the camera module to prevent zinc vapor generated by the hot-dip galvanizing solution from being fixed to the lens of the camera module. The zinc vapor is removed by an inert gas that moves to the surface of the lens through the gas supply part and is absorbed by the gas suction part.

[0022] In the present invention, zinc vapor generated by hot-dip galvanizing solution is removed by adding a swirl flow to the inert gas moving to the lens surface of the camera module to prevent the zinc vapor from being fixed to the lens of the camera module.

[0023] A nose control system according to another aspect of the present invention includes: a nose device that is immersed in a plating bath containing a hot-dip galvanizing solution and introduces a steel sheet into the plating bath; and a processor connected to the nose device. The processor identifies a difference between a height of a water level measured by a sensor for measuring a water level of a bath surface of the hot-dip galvanizing solution and a height of a stopper unit of the nose device, identifies at least one of a structure in a vent pipe part and a foreign object on the bath surface based on an image captured by a camera device installed in the nose device, and controls the nose device based on at least one of the identified height difference, the identified structure in the vent pipe part, and the identified foreign object on the bath surface.

[0024] In the present invention, the processor identifies the flow of foreign matter on the bath surface by applying optical flow to the image, the foreign matter floating on the bath surface within the vent pipe component and approaching the steel plate.

[0025] In the present invention, the processor indicates a first color when foreign matter is mixed into the bath surface within the vent pipe component, and indicates a second color when the foreign matter is discharged from the bath surface within the vent pipe component to the outside of the baffle unit, so that the current working status within the vent pipe component can be monitored in real time.

[0026] In the present invention, when the height difference is equal to or greater than a preset reference value, the preset structure exists in the image at a preset predetermined ratio or more, and the flow direction of foreign matter on the bath surface is forward, the processor maintains the height of the nose device.

[0027] In the present invention, when the difference in height is equal to or greater than a preset reference value, the preset structure exists in the image in a predetermined proportion or greater, and the flow direction of foreign matter on the bath surface is reverse, the processor raises the height of the nose device so that the foreign matter on the bath surface is discharged to the outside of the baffle unit.

[0028] In the present invention, when the difference in height is equal to or greater than a preset reference value and the structure does not exist in the image at a predetermined ratio or more, the processor raises the nasal device so that the structure exists in the image at a predetermined ratio or more.

[0029] In the present invention, when the difference in height is less than a preset reference value, the structure exists in the image at a predetermined ratio or more, and the flow direction of the foreign matter on the bath surface is a forward direction, the processor maintains the height of the nose device.

[0030] In the present invention, when the difference in height is less than a reference value, the structure exists in the image at a predetermined ratio or greater, and the flow direction of foreign matter on the bath surface is reversed, the processor lowers the height of the nose device so that the foreign matter on the bath surface is discharged to the outside of the baffle unit.

[0031] In the present invention, when the difference in height is less than a reference value and the structure does not exist in the image at a predetermined ratio or more, the processor lowers the nose device so that the structure exists at a predetermined ratio or more.

[0032] [Beneficial Effects]

[0033] As described above, according to an embodiment of the present invention, the flow of foreign matter near the baffle unit physically connected to the outside of the vent pipe part of the nasal device is detected in real time, and the difference between the water levels of the bath surfaces inside and outside the baffle unit is identified by a sensor. Therefore, the depth of the bottom of the baffle unit immersed in the plating bath is automatically controlled by raising or lowering the baffle unit of the nasal device when the foreign matter near the baffle unit approaches the steel plate, thereby maintaining an appropriate load, so that the foreign matter is suppressed from mixing into the steel plate, and the load of the pump unit is automatically adjusted based on the water level difference of the bath surface inside and outside the baffle unit. Therefore, foreign matter floating in the vent pipe part can be easily discharged, thereby increasing the life of the pump unit.

[0034] As described above, by using a sensor capable of detecting the real-time water level of the bath surface of the galvanizing bath to automatically control the management of the baffle unit physically connected to the outer surface of the nasal device, a nasal control system and a hot-dip galvanizing device including the same that can have the effect of ensuring work convenience and quality stability can be realized.

[0035] In addition, the present invention can have the following effects: the current working state within the ventilation pipe component can be monitored in real time, so that the working convenience and quality stability can be ensured by automatically controlling the nasal device based on at least one of the water level of the bath surface measured by the sensor, the structure within the ventilation pipe component according to the image captured by the camera, and foreign matter on the bath surface.

[0036] In addition, the following methods can prevent foreign matter from adhering to the steel plate during the hot-dip galvanizing process and can prevent processing failures and human errors: the water level changes on the bath surface are monitored in real time by a sensor, the current working status inside the ventilation pipe component is monitored in real time by analyzing the image captured by the camera, and the lifting and lowering of the nose device is controlled based on the monitoring results.

[0037] Meanwhile, the effects of the present invention are not limited to the above-mentioned effects, and may include various effects within a scope that is obvious to those skilled in the art from the contents described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a process diagram schematically showing a method of manufacturing a hot-dip galvanized steel sheet according to an embodiment of the present invention.

[0039] Figure 2 It is schematically shown Figure 1A perspective view of a hot-dip galvanizing apparatus in a method for manufacturing a hot-dip galvanized steel sheet.

[0040] Figure 3 is a schematic diagram showing the installation Figure 2 A cross-sectional view from the side of a nose control system in a hot-dip galvanizing unit.

[0041] Figure 4 is a schematic diagram showing the installation Figure 2 Cross-sectional view of the front of the nose control system in a hot-dip galvanizing unit.

[0042] Figure 5 It is schematically shown Figure 4 A stereoscopic view of the interior of the snorkel component of a mid-nasal device.

[0043] Figure 6 is a schematic diagram showing the installation Figure 2 Cross-sectional view of the front of the nose control system in a hot-dip galvanizing unit.

[0044] Figure 7 It is schematically shown Figure 6 A stereoscopic view of the interior of the snorkel component of a mid-nasal device.

[0045] Figure 8 and Fig. 9 is a diagram schematically showing a configuration for protecting a lens of a machine vision camera from zinc vapor according to an embodiment of the present invention.

[0046] Fig.10 is an exemplary diagram for describing the flow of foreign matter on a bath surface according to an embodiment of the present invention.

[0047] Fig.11 is a flow chart for describing a nasal control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0048] Hereinafter, several preferred embodiments are described in detail with reference to the accompanying drawings.

[0049] Embodiments of the present invention are provided to those of ordinary skill in the art, so as to more fully describe the present invention. The following embodiments may be modified in various other forms, and the scope of the present invention is not limited to the following embodiments. On the contrary, these embodiments are provided to make the present invention more complete and sufficient, and fully convey the spirit of the present invention. Hereinafter, embodiments of the present invention are described with reference to the accompanying drawings schematically illustrating the ideal embodiments of the present invention.

[0050] [Implementation 1]

[0051] Figure 1is a process diagram schematically showing a method of manufacturing a hot-dip galvanized steel sheet according to an embodiment of the present invention. Figure 2 It is schematically shown Figure 1 A perspective view of a hot-dip galvanizing apparatus in a method for manufacturing a hot-dip galvanized steel sheet. Figure 3 is a schematic diagram showing the installation Figure 2 A cross-sectional view from the side of a nose control system in a hot-dip galvanizing unit. Figure 4 is a schematic diagram showing the installation Figure 2 Cross-sectional view of the front of the nose control system in a hot-dip galvanizing unit. Figure 5 It is schematically shown Figure 4 A stereoscopic view of the interior of the snorkel component of a mid-nasal device. Figure 6 is a schematic diagram showing the installation Figure 2 Cross-sectional view of the front of the nose control system in a hot-dip galvanizing unit. Figure 7 It is schematically shown Figure 6 A stereoscopic view of the interior of the snorkel component of a mid-nasal device.

[0052] Figure 8 and Fig. 9 is a diagram schematically showing a configuration for protecting a lens of a machine vision camera from zinc vapor according to an embodiment of the present invention.

[0053] First, if Figure 1 As shown, the apparatus using the method for manufacturing a hot-dip galvanized steel sheet according to an embodiment of the present invention may basically include a welding device 600, a heating device 700, a rolling device 800, and a post-processing device 900. In addition, the apparatus may include a hot-dip galvanizing apparatus, which includes a plating bath 300, a nose device 100, a processor 200 for controlling the nose device, and an air knife 500. The processor 200 may be implemented with a central processing unit (CPU), a digital signal processor (DSP), a microcontroller unit (MCU), or a system on a chip (SoC), may control a plurality of hardware or software components connected to the processor 200 by driving an operating system or an application program, may perform various types of data processing and operations, and may be configured to execute at least one instruction stored in a memory (not shown) and store the result data of the execution in the memory (not shown).

[0054] like Figure 1 As shown, the steel plate 1 wound after cold rolling or hot rolling is mounted on the pay-off reel C1. The welding between the front steel plate 1 and the rear steel plate 1 is completed by the welding device 600. The steel plate 1 can be heat-treated in the heating device 700 to ensure the material strength and coating adhesion required for hot-dip galvanizing.

[0055] Next, the steel sheet 1 which has completed the heat treatment can be input into the plating bath 300 of the hot dip galvanizing device while the steel sheet maintains a temperature suitable for the galvanizing process. In this case, the steel sheet can be input through the nose device 100 (i.e., the steel sheet introduction device) to prevent the surface of the steel sheet 1 from being oxidized due to the exposure of the steel sheet 1 which has been heat treated at a high temperature to the atmosphere, and to prevent the plating peeling phenomenon caused by the exposure of the steel sheet.

[0056] More specifically, one side of the nose device 100 may be connected to the heating device 700 and the other side may be immersed in the bath surface of the plating bath 300, so that the steel sheet 1 heat-treated in the heating device 700 may be introduced into the plating bath 300 containing the hot-dip galvanizing solution 2. The inside of the nose device 100 may be filled with an inert gas (NHx) to prevent plating peeling due to surface oxidation of the steel sheet 1.

[0057] Next, after the steel sheet 1 passing through the nose device 100 is plated with molten zinc in the plating bath 300 containing the hot-dip galvanizing solution 2, the amount of the coating attached to the steel sheet can be adjusted to a preset thickness by the air knife 500, which is installed above the plating bath 300 and adjusts the thickness of the molten zinc attached to the steel sheet 1.

[0058] The plated steel sheet 1 as described above can be manufactured to a state where the steel sheet surface is smooth by performing temper rolling in the rolling device 800. Thereafter, the steel sheet can be wound on a tension reel C2 through a post-processing device 900 including a shape corrector, a post-processing device for ensuring corrosion resistance, and a cutter for final commercialization.

[0059] The hot dip galvanizing device in the method for manufacturing hot dip galvanized steel sheet is described in more detail. Figures 2 to 4 As shown, the steel sheet 1 can be introduced into the plating bath 300 containing the hot-dip galvanizing solution 2 by means of a nose device 100, a first sensor 160 and a processor 200, wherein the nose device 100 is connected to the heating device 700 and one end of the nose device 100 is immersed in the bath surface of the hot-dip galvanizing solution 2 contained in the plating bath 300, the first sensor 160 is arranged above a part of the plating bath 200 and can measure a first water level of the bath surface of the hot-dip galvanizing solution 2, and the processor 200 controls the first sensor.

[0060] Furthermore, by means of the sinking roll R1 immersed in the plating bath 300 and the stabilizing roll R2 installed just above the sinking roll, the steel sheet 1 can be continuously transferred while the path line of the steel sheet is vertically changed just above the plating bath 300. Through such a process, the hot dip galvanizing liquid 2 contained in the plating bath 300 can be attached to the surface of the steel sheet 1.

[0061] Thereafter, the bending of the steel sheet 1 passing through the sinking roll R1 can be corrected while the steel sheet passes between a pair of stabilizing rolls R2 installed just above the sinking roll. The amount of molten zinc attached to the surface of the steel sheet can be adjusted while the steel sheet passes through the air knife 500.

[0062] like Figures 2 to 4 As shown, in the hot-dip galvanizing apparatus, the nose device 100 basically includes a vent pipe component 110, a detachable baffle unit 120, a pump unit 130 and a first sensor 160 capable of measuring the water level of the bath surface of the hot-dip galvanizing liquid 2, and can be controlled by a processor 200 operating in conjunction with the first sensor 160.

[0063] The nose device 100 is formed to surround the steel sheet 1, having an inner space A3 filled with an inert gas (NHx), and thus can prevent the surface of the steel sheet 1 subjected to heat treatment at a high temperature in the heating device 700 from being oxidized when the steel sheet is exposed to the atmosphere. In addition, the structure of the nose device can prevent surface defects from occurring due to the ash formed by condensation of the vapor of the hot-dip galvanizing solution 2 contained in the plating bath 300 being attached to the surface of the steel sheet 1 as foreign matter.

[0064] A snorkel member 110 partially immersed in the bath surface of the hot-dip galvanizing solution 2 contained in the plating bath 300 may be installed at the lower side of the nose device 100. More specifically, the snorkel member 110 is formed to surround the steel sheet 1 introduced into the plating bath 300, and may guide the steel sheet 1 so that the steel sheet is introduced into the hot-dip galvanizing solution 2 contained in the plating bath 300 through an opening 111 formed at the bottom of the snorkel member 110 immersed in the bath surface of the plating bath 300.

[0065] In this case, the vent pipe member further includes a detachable stopper unit 120, the stopper unit 120 including a first stopper wall portion 121 and a second stopper wall portion 122, the first stopper wall portion 121 and the second stopper wall portion 122 being physically coupled to the outer wall portion of the vent pipe member 110, and being driven along the outer wall of the vent pipe member 110 based on information of a first water level of the bath surface of the hot-dip galvanizing liquid 2 while operating in conjunction with the first sensor 160, so as to provide a predetermined pressure in the opening of the vent pipe member 110. The barrier unit 120 is spaced apart from the inner wall portion 112 of the ventilating duct component 110, and is formed along the inner circumference of the ventilating duct component 110 so that the first barrier wall portion and the second barrier wall portion protrude at a predetermined height in the height direction of the ventilating duct component 110, and forms an accommodating space capable of accommodating the hot-dip galvanizing liquid 2 introduced through the opening between the second barrier wall portion 122 spaced apart from the inner wall portion 112 of the ventilating duct component 110 and the first barrier wall portion 121 and then flowing through the first barrier wall portion 121.

[0066] For example, the vent part 110 is formed in a rectangular tube form having a rectangular cross-section and can be connected to the bottom of the nasal device 100 formed in the same rectangular tube form. In addition, although not shown, the stopper unit 120 connected to the outer wall portion of the vent part 110 can be driven up and down based on the bath surface of the plating bath 300 by a driving device such as an actuator, thereby adjusting the depth of the bottom of the stopper unit immersed in the plating bath 300. The stopper unit 120 is configured in a slide rail form and is physically connected to the outer wall portion of the vent part 110. In this case, in order to minimize the influence of the heat energy transferred by the plating bath 300, a driving device (not shown) for driving the stopper unit 120 can be connected to any part of the nasal device 100. In this case, in order to prevent the motor (not shown) included in the driving device (not shown) from overheating, a cooling pipe (not shown) for water cooling can be formed along the outer peripheral surface of the motor.

[0067] In addition, if Figures 3 to 5 As shown, the stopper unit 120 includes a first stopper wall portion 121 and a second stopper wall portion 122 which are spaced apart from the inner wall portion 112 of the vent pipe member 110 by a predetermined distance and are formed along the inner circumference of the vent pipe member 110 so that the first stopper wall portion and the second stopper wall portion protrude at a predetermined height in the height direction of the vent pipe member 110 in the opening 111 of the vent pipe member 120, so that an accommodation space A1 can be formed, and the accommodation space A1 can accommodate the hot-dip galvanizing liquid 2 which flows through the first stopper wall portion 121 after being introduced through the opening 111 between the second stopper wall portion 122 spaced apart from the inner wall portion 112 of the vent pipe member 110. In this case, the second stopper wall portion 122 is formed to have a relatively higher height than the first stopper wall portion 121. This may cause a problem in the lifting and lowering drive of the stopper unit 120 when the foreign matter D approaching the steel sheet 1 moves toward the second stopper wall portion 122 and the outer wall portion of the vent pipe member 110. Therefore, by forming the second stopper wall portion 122 to have a height higher than the water level of the bath surface of the hot-dip galvanizing solution 2, the foreign matter D approaching the steel sheet 1 can be physically blocked from approaching the driving portion of the stopper unit 120.

[0068] For example, the stopper unit 120 is coupled to the outer wall portion of the vent pipe member 110, and forms the accommodation space A1 formed by the first stopper wall portion 121 having a form in which the first stopper wall portion is bent toward the opening 111 of the vent pipe member 110. In a state in which the vent pipe member 110 is immersed in the plating bath 300 or formed at a relatively higher position than the bath surface of the hot dip galvanizing solution 2, a portion of the stopper unit 120 may be formed to have the same height as the bath surface of the hot dip galvanizing solution 2 introduced through the opening 111 of the vent pipe member 110, or formed at a relatively lower position than the bath surface of the hot dip galvanizing solution 2. Therefore, when the bottom of the stopper unit 120 is immersed in the plating bath 300, the hot dip galvanizing solution 2 introduced through the opening 111 of the vent pipe member 110 may flow through the first stopper wall portion 121 and may be accommodated in the accommodation space A1 of the stopper unit 120.

[0069] In addition, the pump unit 130 is installed at the outside of the vent pipe member 110 , and may discharge the hot dip galvanizing liquid 2 contained in the containing space A1 of the stopper unit 120 to the plating bath 300 by pumping the hot dip galvanizing liquid.

[0070] More specifically, the pump unit 130 is installed at a position corresponding to the stopper unit 120 outside the vent pipe member 110, so that the pumping space A2 in the pump unit is connected to the accommodation space A1 of the stopper unit 120 in a manner of communicating with the accommodation space. The pump unit 130 includes a housing portion 131 having an outlet 131a formed at one side thereof so that the hot-dip galvanizing liquid 2 introduced from the accommodation space A1 into the pumping space A2 is discharged into the plating bath 300. In this case, the pump unit may include: an impeller portion 132 rotatably installed in the pumping space A2 of the housing portion 131, and driven by its rotation to make the hot-dip galvanizing liquid 2 introduced into the pumping space A2 flow toward the outlet 131a; and a driving motor installed at one side of the housing portion 131 through a bracket B installed at the stopper unit 120 side, and driving the impeller portion 132 having a rotating shaft 132a connected to a rotating shaft 133a to rotate.

[0071] The pump unit 130 can cause the hot-dip galvanizing liquid 2 in the plating bath 300 to be continuously introduced through the opening 111 of the vent pipe member 110 in the following manner: the hot-dip galvanizing liquid 2 that flows through the first stopper wall portion 121 after being introduced through the opening 111 of the vent pipe member 110 and is accommodated in the accommodation space A1 of the stopper unit 120 is discharged to the bath surface of the plating bath 300 outside the vent pipe member 110.

[0072] As described above, by discharging the hot-dip galvanizing liquid 2 accommodated in the accommodation space A1 of the baffle unit 120 to the bath surface of the plating bath 300 outside the vent pipe member 110, the pump unit 130 causes the foreign matter D (e.g., scum) contained in the hot-dip galvanizing liquid 2 to float on the bath surface of the plating bath 300. It is possible to prevent the foreign matter D from mixing with the hot-dip galvanizing liquid 2 in the plating bath 300 and thus contaminating the hot-dip galvanizing liquid 2 again, or to prevent the foreign matter from being introduced again through the opening 111 of the vent pipe member 110 whose bottom is immersed below the bath surface of the plating bath 300.

[0073] In this case, foreign matter D may be removed from the bath surface of the plating bath 300 by a separate removal device, such as scum discharged to and floating on the bath surface of the plating bath 300 by the pump unit 130 , or may be removed by a worker.

[0074] Furthermore, the form of the pump unit 130 is not essentially limited to Figures 3 to 5 Various forms in which the hot-dip galvanizing liquid 2 accommodated in the accommodation space A1 of the stopper unit 120 can be discharged toward the bath surface of the plating bath 300 outside the vent pipe member 110 are applicable to the form of the pump unit.

[0075] like Figure 4 and Figure 5 As shown, the nose device 100 may further include second sensors 140 and 150, which are installed on either side of the internal space of the vent pipe component 110, measure the second water level of the bath surface of the hot-dip galvanizing solution 2 introduced into the opening 111, flowing through the first stopper wall portion 121 and accommodated in the accommodation space A1 of the stopper unit 120, and detect foreign matter D floating on the bath surface of the hot-dip galvanizing solution 2 introduced into the vent pipe component 110 through the opening and approaching the steel plate 1.

[0076] The second sensors 140 and 150 may measure the second water level of the bath surface of the hot-dip galvanizing liquid 2 introduced into the opening 111 by using any one of an ultrasonic sensor, an infrared sensor, and a radar sensor. In addition, the second sensors 140 and 150 may detect foreign matter D floating on the bath surface of the hot-dip galvanizing liquid 2. In addition to the sensor, any one of the second sensors 140 and 150 may also be a visual sensor that detects foreign matter D floating on the bath surface of the hot-dip galvanizing liquid 2 by using a camera image sensor. Alternatively, the types of the second sensors 140 and 150 may be selectively changed so that any one of the second sensors may measure the second water level of the bath surface of the hot-dip galvanizing liquid 2 by using any one of an ultrasonic sensor, an infrared sensor, and a radar sensor, while the other of the second sensors may detect foreign matter D floating on the bath surface of the hot-dip galvanizing liquid 2 by using a visual sensor. Figure 4 and Figure 5 As shown, any one of the second sensors 140 and 150 may be disposed between one side of the steel plate 1 and the inner wall of the ventilating tube member 110. The other of the second sensors 140 and 150 may be disposed between the other side of the steel plate 1 and the inner wall of the ventilating tube member 110.

[0077] If a laser sensor is used as the second sensor 150, the laser sensor can detect and recognize the presence of foreign matter D when values ​​recognized according to the difference between the reflectance of foreign matter D floating on the bath surface of the hot dip galvanizing liquid 2 and the reflectance of the bath surface of the hot dip galvanizing liquid 2 in a normal state are different from each other. In this case, the normal state means a state in which only the pure hot dip galvanizing liquid 2 containing no foreign matter D exists.

[0078] Specifically, by comprehensively considering the information of the gap G between the first water level measured by the first sensor 160 and the stopper wall portion 121 and the information of the load of the pump unit 10, the flow rate of the overflow from the inside to the outside of the stopper unit 120 increases when the amount of overflow occurring by the descent of the stopper unit 120 increases. Alternatively, by increasing the RPM of the pump unit 130 according to the increase in the amount of overflow, the gap G between the first water level measured by the first sensor 160 and the first stopper wall portion 121 can be continuously and automatically controlled.

[0079] Meanwhile, as described above, any one of the second sensors 140 and 150 may be implemented with a camera module (i.e., a visual sensor having an automatic focusing function or a lifting function). In this case, the second sensor 150 different from the camera module may be implemented with any one of an ultrasonic sensor, an infrared sensor, and a radar sensor (in order to clearly distinguish the terms, the reference numerals are written side by side to indicate that the second sensor 150 shown below corresponds to a second sensor different from the camera module 140). The recognition rate of the foreign matter D floating on the bath surface of the hot-dip galvanizing liquid 2 may be improved by the function of the camera module 140. The image of the foreign matter D measured by the camera module 140 is repeatedly learned, and an image signal according to the size and shape of the foreign matter D is sent to the processor 200. The processor adjusts the position of the stopper unit 120 or controls the load of the pump unit 130 based on the image signal.

[0080] Specifically, an image library of foreign matter D on the bath surface of the hot-dip galvanizing solution 2 is constructed by performing pre-image learning using the camera module 140 , and images thereof are stored in a data storage library of the processor 200 .

[0081] When the amount of overflow occurring by the descent of the stopper unit 120 increases, the flow rate of the overflow from the inside to the outside of the stopper unit 120 is increased by comprehensively considering the information of the gap G between the first water level measured by the first sensor 160 and the stopper wall portion 121 and the information of the load of the pump unit 10 while receiving the real-time information of the foreign matter D floating on the bath surface of the hot-dip galvanizing solution 2 based on the learning data of the constructed image library of the foreign matter D. Alternatively, by increasing the RPM of the pump unit 130 according to the increase in the amount of overflow, the gap G between the first water level measured by the first sensor 160 and the first stopper wall portion 121 can be continuously and automatically controlled.

[0082] The camera module 140 and the second sensor 150 may function complementarily to detect foreign matter D floating on the bath surface of the hot-dip galvanizing solution 2. For such complementary functions, the camera module 140 and the second sensor 150 may have Figure 6 and Figure 7 That is, the camera module 140 and the second sensor 150 are arranged on the same horizontal line and can be arranged between the steel plate 1 and the inner wall of the ventilating pipe component 110 regardless of the order of the camera module and the second sensor. Figure 6 and Figure 7 As shown, the camera module 140 may be arranged at a position adjacent to the steel plate 1. The second sensor 150 may be arranged on the same horizontal line as the camera module 140 by being spaced apart from the camera module by a predetermined distance. Alternatively, the second sensor 150 may be arranged at a position adjacent to the steel plate 1, and the camera module 140 may be arranged on the same horizontal line as the second sensor 150 by being spaced apart from the second sensor by a predetermined distance.

[0083] In addition, the processor 200 is electrically connected to the first sensor 160 and the second sensors 140 and 150, and the processor can receive sensing signals from the first sensor 160 and the second sensors 140 and 150, and can raise or lower the barrier unit 120 based on the sensing signals so that the depth of the barrier unit 120 immersed in the plating bath 300 can be adjusted, or the load of the pump unit 130 can be adjusted so that the flow rate of the hot-dip galvanizing liquid 2 pumped by the pump unit 130 can be controlled.

[0084] For example, when it is detected through the second sensors 140 and 150 that the foreign matter D approaches the steel sheet 1 , the processor 200 may increase the depth of the bottom of the stopper unit 120 immersed in the plating bath 300 by lowering the stopper unit 120 .

[0085] More specifically, when the second sensors 140 and 150 detect that a foreign object D floating on the bath surface of the hot-dip galvanizing solution 2 introduced into the snorkel member 110 through the opening 111 of the snorkel member 110 approaches the steel plate 1, the processor 200 can increase the depth of the bottom of the stopper unit 120 immersed in the plating bath 300 by lowering the stopper unit 120, thereby controlling the top of the first stopper wall portion 121 of the stopper unit 120 connected to the outer surface of the snorkel member 110 to be lower than the bath surface of the hot-dip galvanizing solution 2 introduced into the snorkel member 110.

[0086] In this case, the position of the stopper unit 120 needs to be adjusted so that the gap G between the first water level measured by the first sensor 160 and the stopper wall portion 121 is continuously maintained. Therefore, if the stopper unit 120 is lowered toward the bottom of the hot-dip galvanizing liquid 2 when the foreign matter D is detected, the size of the gap G may be increased immediately. For such a case, the processor 200 may continuously maintain the gap G by controlling the load of the pump unit 130 in consideration of the greatly increased gap G, thereby controlling the hot-dip galvanizing liquid 2 so that some of the hot-dip galvanizing liquid is quickly discharged to the outside through the accommodation space A2 of the pump unit 130.

[0087] Therefore, by causing the hot-dip galvanizing liquid 2 introduced into the vent pipe member 110 through the opening 111 of the vent pipe member 110 to quickly flow through the first stopper wall portion 121, the hot-dip galvanizing liquid 2 in the vent pipe member 110 is quickly caused to flow from the opening 111 to the accommodation space A1 of the stopper unit 120. Therefore, it is possible to cause the foreign matter D floating on the bath surface of the hot-dip galvanizing liquid 2 to move away from the steel sheet 1 along with the flow of the hot-dip galvanizing liquid 2, flow through the stopper wall portion 121, be accommodated in the accommodation space A1 of the stopper unit 120, and be discharged to the bath surface of the plating bath 300 through the pump unit 130.

[0088] As described above, when foreign matter D approaches the steel plate 1, the second sensors 140 and 150 and the processor 200 automatically control the immersion depth of the stopper unit 120 or the load of the pump unit 130. Therefore, during the hot dip galvanizing process, foreign matter D can be prevented from being attached to the steel plate 1.

[0089] In addition, the processor 200 can continuously maintain the spacing G between the protruding portion protruding to the first stopper wall portion 121 and the bath surface of the hot-dip galvanizing liquid 2 by combining the first water level of the bath surface of the hot-dip galvanizing liquid 2 detected by the first sensor 160 with the information of the position of the first stopper wall portion 121 of the stopper unit 120 to derive the information of the spacing, and control the position of the stopper unit 120 based on the derived information of the spacing and the information of the load of the pump unit 130. The spacing can meet the range of 10mm to 20mm. When the foreign matter D approaches the steel plate 1, the flow rate of discharging the foreign matter D needs to be greater than the critical point so that the foreign matter is discharged to the outside through the stopper unit 120. If the spacing is less than 10mm, the foreign matter D cannot be effectively discharged because the spacing does not easily generate a flow rate that causes the foreign matter D to move and be discharged to the outside. On the contrary, if the spacing is greater than 20mm, the flow rate of the foreign matter D becomes faster and the flow rate of the foreign matter D is greater than the load of the pump unit 130. Therefore, in order to solve such a problem, the spacing needs to be maintained at 10mm to 20mm.

[0090] More specifically, as the water level difference H according to the information of the first water level and the position of the stopper unit 120 decreases, the height of the bath surface of the hot-dip galvanizing solution 2 introduced into the vent pipe member 110 and the height of the top of the first stopper wall portion 121 become similar. Therefore, since the hot-dip galvanizing solution 2 flows through the first stopper wall portion 121, the flow of the hot-dip galvanizing solution 2 introduced into the vent pipe member 110 through the opening 111 of the vent pipe member 110 toward the accommodation space A1 of the stopper unit 120 can be weakened. In this case, the flow of foreign matter D floating on the bath surface of the hot-dip galvanizing solution 2 in the vent pipe member 110 is also weakened. Therefore, as the time for which the foreign matter floats around the steel sheet 1 increases, the probability that a malfunction may be caused by the attachment of the foreign matter D to the steel sheet 1 increases.

[0091] Therefore, by controlling the water level difference H while raising or lowering the barrier unit 120 so that the water level difference H based on the information of the first water level and the position of the first barrier wall portion 121 of the barrier unit 120 is continuously maintained, the following effects can be achieved: foreign matter D floating on the bath surface of the hot-dip galvanizing liquid 2 in the vent pipe part 110 can be prevented from attaching to the steel plate 1, and since the pump unit 130 maintains an appropriate load, the life of the pump unit 130 can also be increased.

[0092] In this case, the water level difference H according to the information of the first water level and the position of the first stopper wall portion 121 of the stopper unit 120 may be preset by a worker and stored in the processor 200. The processor 200 may control the load of the pump unit 130 based on the preset and input water level difference H so that the information of the first water level and the position of the stopper unit 120 is continuously maintained.

[0093] In addition, the processor 200 may cause the water level difference H according to the first water level and the position of the stopper unit 120 to be continuously maintained by controlling the immersion depth of the stopper unit 120 in addition to controlling the load of the pump unit 130 while operating in conjunction with the second sensors 140 and 150 .

[0094] For example, processor 200 can increase the depth of the bottom of barrier unit 120 immersed in plating bath 300 by lowering barrier unit 120 when the position of barrier unit 120 is less than a preset reference, and can reduce the depth of the bottom of barrier unit 120 immersed in plating bath 300 by raising barrier unit 120 when the position of barrier unit 120 is greater than the reference.

[0095] Therefore, if the water level difference H according to the first water level and the position of the stopper unit 120 increases due to the position of the stopper unit 120 becoming smaller than the preset reference, the processor may reduce the water level difference H by lowering the stopper unit 120 so that the depth of the top of the first stopper wall portion 121 immersed from the bath surface of the hot-dip galvanizing liquid 2 introduced into the vent pipe member 110 increases, causing the flow of the hot-dip galvanizing liquid 2 introduced through the opening 111 and flowing through the first stopper wall portion 121 to increase. On the contrary, if the water level difference H according to the first water level and the position of the stopper unit 120 almost disappears due to the information of the position of the stopper unit 120 becoming larger than the preset reference, the processor may increase the water level difference H by raising the stopper unit 120 so that the depth of the top of the first stopper wall portion 121 immersed from the bath surface of the hot-dip galvanizing liquid 2 introduced into the vent pipe member 110 decreases, causing the flow of the hot-dip galvanizing liquid 2 introduced through the opening 111 and flowing through the first stopper wall portion 121 to decrease.

[0096] Therefore, according to the nose control system and the hot dip galvanizing apparatus including the same according to the embodiment of the present invention, the first water level of the bath surface of the hot dip galvanizing solution 2 is recognized by utilizing the flow of the foreign matter D around the stopper unit 120 in the vent pipe part 110 of the nose device 100 and the first sensor 160, and the water level difference H according to the information of the position of the stopper unit 120 is recognized by the second sensors 140 and 150. Therefore, when the foreign matter D around the stopper unit 120 approaches the steel sheet 1, the depth of the bottom of the stopper unit 120 immersed in the plating bath 300 is automatically controlled by raising or lowering the stopper unit 120 of the nose device 100, so that the foreign matter D can be prevented from being mixed into the steel sheet 1. The foreign matter D floating in the vent pipe part 110 can be easily discharged, thereby extending the life of the pump unit 130 because the load of the pump unit 130 is maintained at an appropriate load by automatically adjusting the load of the pump unit based on the position of the stopper unit 120.

[0097] In addition, the second sensors 140 and 150 may measure the second water level of the bath surface of the hot-dip galvanizing liquid 2 flowing through the first stopper wall portion 121 and contained in the containing space A1 of the stopper unit 120. In this case, the processor 200 may control the interval G between the second water level and the first water level to be always 80 mm or more through the second sensors 140 and 150 so that the hot-dip galvanizing liquid 2 does not flow back from the containing space A1 of the stopper unit 120 to the opening 111 of the vent pipe member 110. If the interval between the first water level and the second water level is less than 80 mm, the foreign matter D cannot be effectively discharged due to the load generated in the pump unit 130. The foreign matter D and the hot-dip galvanizing liquid 2 that have not been discharged to the outside flow back to the opening 111 of the vent pipe member 110 through the first stopper wall portion 121. Therefore, in order to effectively control the foreign matter and the hot-dip galvanizing liquid, it is necessary to control the interval between the first water level and the second water level to be at least 80 mm or more by taking the load of the pump unit 130 into consideration.

[0098] As described above, the management of the stopper in the nasal device 100 is automatically controlled by detecting the water level difference H according to the information of the first water level and the position of the stopper unit 120 by using the second sensors 140 and 150 capable of detecting the foreign matter D floating on the bath surface in the vent part 110 of the nasal device 100 or detecting the position of the stopper unit 120 and the first sensor 160 capable of detecting the first water level of the bath surface of the hot-dip galvanizing liquid 2. Therefore, the effect of ensuring the convenience of work and the stability of quality can be achieved.

[0099] Meanwhile, since the lens of the camera module 140 disposed in the vent pipe member 110 is contaminated by zinc vapor evaporated from the hot-dip galvanizing solution 2, the recognition of foreign matter D floating on the bath surface of the hot-dip galvanizing solution 2 is adversely affected. Figure 8 and Fig. 9 The method shown is to prevent lens contamination.

[0100] Figure 8 and Fig. 9 is a diagram schematically showing a configuration for protecting a lens of a machine vision camera from zinc vapor according to an embodiment of the present invention.

[0101] First, refer to Figure 8, the nose device 100 of the present invention further includes a gas supply component 142 and a gas suction component 144, so that an inert gas capable of removing zinc vapor by absorbing zinc vapor or a reaction gas that reacts with zinc vapor can be supplied. In this case, the nose device also includes a gas supply pipe 143 and a gas suction pipe 145, and the gas supply pipe 143 and the gas suction pipe 145 are formed so that gas can be supplied to the surface of the lens set on one side of the camera module 140 by supplying gas to the surroundings of the camera module 140, and the gas can be sucked. When galvanizing is performed, gas supply can be performed at all times. The gas supply pipe 143 and the gas suction pipe 145 can be formed in an area outside the sensing area of ​​the lens so as not to affect the camera module 140 from detecting foreign matter D floating on the bath surface of the hot-dip galvanizing liquid 2.

[0102] As another example, see Fig. 9 , the nose device 100 of the present invention is filled with an inert gas to prevent the plating peeling due to surface oxidation of the steel plate 1. In this case, the nose device may further include a vortex flow generating device (not shown) capable of generating a vortex flow on the lens surface of the camera module 140 by rotating the inert gas supplied to the nose. The zinc vapor may be absorbed by the inert gas and removed toward a separate pipe (not shown) by the vortex flow.

[0103] According to Embodiment 1, since the stopper unit 120 formed integrally with the vent pipe member 110 is manufactured in a detachable form and physically connected to the outer surface of the vent pipe member 110, it is possible to replace the stopper unit during the operation of the processing line, and thus it is expected that maintenance and productivity are improved. In addition, it is expected that since workers can more smoothly and accurately process the surface of the stopper unit 120 by introducing the detachable stopper unit 120, the occurrence of poor surface quality due to flow deviation between the front and rear surfaces of the steel plate caused by the processing failure of the stopper unit 120 is reduced.

[0104] In addition, the worker is in a work environment with a high risk of quality defects because the worker controls the position of the stopper unit 120 by constantly monitoring the stopper unit. However, since the processor 200 automatically controls the position of the stopper unit 120 based on the water level of the bath surface of the hot-dip galvanizing liquid 2, the following effects can be achieved: mistakes caused by workers can be prevented, and poor surface quality caused by mistakes can be reduced.

[0105] [Implementation 2]

[0106] Fig.10 is an exemplary diagram for describing the flow of foreign matter on a bath surface according to an embodiment of the present invention. Fig.112 is a flowchart for describing a nose control method according to an embodiment of the present invention. Embodiment 2 focuses on the automatic control configuration of the processor 200 to the nose device, and the structure of the hot dip galvanizing device proposed by Embodiment 2 and its detailed components are the same as those of Embodiment 1.

[0107] In embodiment 2, processor 200 can identify the difference between the height of the water level of the bath surface measured by first sensor 160 and the height of baffle unit 120, can identify at least one of a structure within ventilation tube component 110 and a foreign object on the bath surface based on an image captured by camera module 140, and can control nasal device 100 based on at least one of the identified height difference, the identified structure within ventilation tube component 110, and the identified foreign object on the bath surface.

[0108] The processor 200 monitors the water level changes on the bath surface in real time through the first sensor 160, monitors the current working status in the ventilation tube component 110 in real time by analyzing the image captured by the camera module 140, and controls the raising or lowering of the nasal device 100 based on the monitoring results, so that processing failures and human errors can be prevented.

[0109] Hereinafter, the operation of the processor 200 is described in detail.

[0110] The processor 200 may receive the water level of the bath surface measured by the first sensor 160 and the image captured by the camera module 140 .

[0111] The processor 200 may identify the difference between the height of the water level of the bath surface and the height of the stopper unit 120, and may compare the difference between the height of the water level of the bath surface and the height of the stopper unit 120 with a preset reference value. In this case, the reference value is a preset value, for example, 2 mm. The difference between the height of the water level of the bath surface and the height of the stopper unit 120 may mean the difference between the height of the water level of the bath surface and the height of the first stopper wall portion 121. Specifically, the difference between the height of the water level of the bath surface and the height of the stopper unit 120 may mean the difference between the height of the water level of the bath surface and the height of the top of the first stopper wall portion 121.

[0112] Thereafter, the processor 200 may monitor the flow from the bath surface to the inside / outside of the baffle unit 120 in the nasal device 100 by applying computer vision technology to the image captured by the camera module 140. That is, the processor 200 may monitor the working conditions in the nasal device 100 by analyzing the internal structure according to the water level of the bath surface and the flow of foreign matter floating on the bath surface by using the image captured by the camera module 140.

[0113] Specifically, the processor 200 may identify a preset structure within the ventilator member 110 by applying an object recognition algorithm to an image captured by the camera module 140. That is, the processor 200 may identify the extent of structural immersion or the recognition (existence) ratio of the structure by applying the object recognition algorithm. In this case, the preset structure is a structure set by learning, and may include a support member, for example.

[0114] The processor 200 can determine whether the structure identified by the object recognition algorithm exists at a preset predetermined ratio or higher. In this case, the predetermined ratio is, for example, 90%, and can be any set value.

[0115] Thereafter, the processor 200 can identify foreign matter floating on the bath surface within the vent pipe part 110 and approaching the steel plate 1 by applying the optical flow to the image captured by the camera module 140. That is, the processor 200 can use the optical flow, which is one of the image processing techniques, to monitor the flow of foreign matter floating on the bath surface. Optical flow is a technique that can identify the optical flow within an image as a vector diagram representing the movement of pixels between two consecutive frames. If the optical flow is used, there is an advantage that the movement of objects within an image captured by a CCTV or ordinary camera can be monitored even without an expensive machine vision camera. The optical flow is basically represented as a color map, and can indicate the direction as H (color) and the size as S (chromaticity).

[0116] Therefore, the processor 200 indicates the first color when foreign matter is mixed into the barrier unit 120, and indicates the second color when foreign matter is discharged to the outside of the barrier unit 120, so that the current working state in the vent pipe part 110 can be monitored in real time. That is, the light flow can indicate that foreign matter is mixed into the barrier unit 120 when the flow direction of foreign matter floating on the bath surface is reverse, and can indicate that foreign matter is discharged to the outside of the barrier unit 120 when the flow direction of foreign matter floating on the bath surface is forward.

[0117] For example, Fig.10 As shown, the processor 200 may indicate red when foreign matter on the bath surface is mixed into the barrier unit 120 , and may indicate green when the foreign matter is discharged to the outside of the barrier unit 120 .

[0118] In addition, the processor 200 digitizes the vector sum of the mixing of foreign matter on the bath surface into the vent pipe part 110 and the discharge of foreign matter in real time, so that the current working state in the vent pipe part 110 can be analyzed in real time. In this case, the processor 200 can generate the vector sum of the mixing of foreign matter on the bath surface into the vent pipe part 110 and the discharge of foreign matter, such as Fig.10 shown.

[0119] Processor 200 may control nasal device 100 based on at least one of a difference between a height of a water level of a bath surface and a height of stopper unit 120, a structure within vent member 110, and foreign matter on the bath surface.

[0120] For example, the difference between the height of the water level on the bath surface and the height of the baffle unit 120 is equal to or greater than a reference value, the preset structure exists in the image captured by the camera module 140 at a preset predetermined ratio or a larger ratio, and the flow direction of foreign matter on the bath surface is positive, and the processor 200 can maintain the height of the nasal device 100 by determining that the current working state within the ventilation tube component 110 is normal.

[0121] Furthermore, when the difference between the height of the water level of the bath surface and the height of the dam unit 120 is equal to or greater than a reference value, the structure exists in the image at a predetermined ratio or greater, and the flow direction of the foreign matter on the bath surface is reversed, the processor 200 may raise the height of the nose device 100 by determining that the foreign matter on the bath surface is mixed into the dam unit 120. In this case, since the foreign matter on the bath surface is introduced into the dam unit 120, the processor 200 may raise the height of the nose device 100 so that the foreign matter on the bath surface is discharged to the outside of the dam unit 120. That is, since the dam unit 120 is also raised when the height of the nose device 100 is raised, the depth of the bottom of the dam unit immersed in the plating bath 10 may be reduced. Therefore, the foreign matter on the bath surface within the dam unit 120 may be discharged to the outside of the dam unit 120.

[0122] In addition, when the difference between the height of the water level of the bath surface and the height of the barrier unit 120 is equal to or greater than a reference value and the structure does not exist in a predetermined proportion or a larger proportion, the processor 200 can raise the nasal device 100 so that the structure exists in a predetermined proportion or a larger proportion. The fact that the structure does not exist in the image in a predetermined proportion or a larger proportion means that the structure is largely immersed in the bath surface. This means that the water level in the barrier unit 120 is very high. Therefore, it is necessary to discharge foreign matter on the bath surface in the barrier unit 120 to the outside of the barrier unit. Therefore, the processor 200 can discharge foreign matter on the bath surface in the barrier unit 120 to the outside of the barrier unit 120 by raising the nasal device 100.

[0123] In addition, when the difference between the height of the water level on the bath surface and the height of the baffle unit 120 is less than a reference value, the structure exists in the image at a predetermined ratio or greater, and the flow direction of foreign matter floating on the bath surface is positive, the processor 200 can maintain the height of the nasal device 100 by determining that the current working state within the ventilation tube component 110 is normal.

[0124] In addition, when the difference between the height of the water level of the bath surface and the height of the barrier unit 120 is less than a reference value, the structure exists in the image at a predetermined ratio or more, and the flow direction of the foreign matter floating on the bath surface is reverse, the processor 200 may lower the height of the nasal device 100. In this case, since the foreign matter floating on the bath surface is in a state where the foreign matter is mixed into the barrier unit 120 and the barrier unit 120 is high, the processor 200 may lower the nasal device 100 so as to discharge the foreign matter on the bath surface to the outside of the barrier unit 120. That is, since the barrier unit 120 is also lowered when the nasal device 100 is lowered, the foreign matter on the bath surface within the barrier unit 120 may be discharged to the outside of the barrier unit 120.

[0125] In addition, when the difference between the height of the water level of the bath surface and the height of the barrier unit 120 is less than a reference value and the structure does not exist in the image at a predetermined ratio or greater, the processor 200 can lower the nasal device 100 so that the structure exists at a predetermined ratio or greater. The fact that the structure does not exist in the image at a predetermined ratio or greater means that the structure is largely immersed in the bath surface. This means that the water level in the barrier unit 120 is very high. Therefore, it is necessary to discharge foreign matter on the bath surface in the barrier unit 120 to the outside of the barrier unit. In this case, because the barrier unit 120 is very high, the processor 200 can lower the nasal device 100 so as to discharge foreign matter on the bath surface to the outside of the barrier unit 120. Therefore, foreign matter in the barrier unit 120 can be discharged to the outside of the barrier unit 120.

[0126] As described above, the processor 200 can automatically control the depth of the bottom of the nose device 100 immersed in the plating bath 10 by controlling the nose device 100 based on at least one of the difference between the height of the water level of the bath surface and the height of the stopper unit 120, the structure in the vent pipe part 110, and the foreign matter on the bath surface, and can monitor the current working state in the vent pipe part 110 in real time. Therefore, the effect of ensuring work convenience and quality stability can be achieved. In addition, the processor 200 can prevent foreign matter from adhering to the steel plate 1 during the hot dip galvanizing process by automatically controlling the immersion depth of the nose device 100 when the foreign matter approaches the steel plate 1.

[0127] The processor 200 can monitor the water level changes on the bath surface in real time through the first sensor 160, can detect the extent of the risk by analyzing the current working status within the ventilation tube component 110 in real time using computer vision technology, and can automatically control the nasal device 100 based on the detection results, so that processing automation can be ultimately achieved by preventing processing failures and human errors.

[0128] The nasal control system according to an embodiment of the present invention can raise or lower the nasal device 100 based on at least one of the difference between the height of the water level of the bath surface and the height of the baffle unit 120 of the nasal device 100, the structure within the ventilation pipe part 110, and the flow of foreign matter on the bath surface, thereby suppressing the mixing of foreign matter into the steel plate 1.

[0129] Fig.11 is a flow chart for describing a nasal control method according to an embodiment of the present invention.

[0130] refer to Fig.11 , the processor 200 receives the water level of the bath surface measured by the first sensor 160 and the image captured by the camera module 140 (S602).

[0131] When executing step S602, processor 200 calculates a difference between the height of the water level of the bath surface and the height of barrier unit 120, and determines whether the calculated height difference is equal to or greater than a reference value (S604).

[0132] When the difference in height is equal to or greater than the reference value as a result of the determination in step S604, the processor 200 recognizes a preset structure by using the image captured by the camera module 140 (S606), and determines whether the recognized structure exists at a preset predetermined ratio or more (S608). In this case, the processor 200 can recognize the structure within the ventilator member 110 by applying an object recognition algorithm to the image.

[0133] When the identified structure exists in a predetermined ratio or more as a result of the determination in step S608, the processor 200 identifies the flow of foreign matter on the bath surface based on the image (S610), and determines whether the flow direction of the foreign matter on the bath surface is positive (S612). In this case, the processor 200 can identify the flow of foreign matter on the bath surface by applying optical flow, and the foreign matter floats on the bath surface within the vent pipe part 110 and approaches the steel plate 1. The flow direction of the foreign matter on the bath surface is positive, which may mean that the foreign matter floating on the bath surface is discharged. The flow direction of the foreign matter on the bath surface is reverse, which may mean that the foreign matter is mixed into the bath surface.

[0134] When the flow direction of the foreign matter on the bath surface is the forward direction as a result of the determination in step S612, the processor 200 maintains the height of the nasal device 100 (S614). That is, when the flow direction of the foreign matter on the bath surface is the forward direction, because the foreign matter on the bath surface is normally discharged to the outside of the barrier unit 120, the processor 200 can maintain the height of the nasal device 100.

[0135] When the flow direction of the foreign matter on the bath surface is reverse as a result of the determination in step S612, the processor 200 raises the height of the nasal device 100 (S616). That is, when the flow direction of the foreign matter on the bath surface is reverse, since the foreign matter is mixed into the bath surface, it is necessary to discharge the mixed foreign matter to the outside of the barrier unit 120. Therefore, the processor 200 may raise the height of the nasal device 100. When the height of the nasal device 100 is raised, the height of the barrier unit 120 is also raised. Therefore, the foreign matter on the bath surface can be discharged to the outside of the barrier unit 120.

[0136] When the identified structure does not exist in a predetermined proportion or more as a result of the determination in step S608, the processor 200 raises the nasal device 100 so that the structure exists in a predetermined proportion (S618). The fact that the structure does not exist in the image in a predetermined proportion or more means that the structure is largely immersed in the bath surface. This means that the water level in the barrier unit 120 is high. Therefore, it is necessary to discharge foreign matter on the bath surface in the barrier unit 120 to the outside. Therefore, the processor 200 can discharge foreign matter on the bath surface to the outside of the barrier unit 120 by raising the nasal device 100.

[0137] When the difference in height is not equal to or greater than the reference value as a result of the determination in step S604, the processor 200 determines whether the difference in height is less than a reference value (S620).

[0138] When the difference in height is less than the reference value as a result of the determination in step S620, the processor 200 recognizes a preset structure by using the image captured by the camera module 140 (S622), and determines whether the structure exists at a preset predetermined ratio or more (S624). In this case, the processor 200 can recognize the structure within the ventilator member 110 by applying an object recognition algorithm to the image.

[0139] When the identified structure exists at a predetermined ratio or more as a result of the determination in step S624, the processor 200 identifies the flow of foreign matter on the bath surface based on the image (S626), and determines whether the flow direction of the foreign matter on the bath surface is a positive direction (S628). In this case, the processor 200 can identify the flow of foreign matter on the bath surface by applying optical flow, the foreign matter floating on the bath surface 110 within the vent pipe part 110 and approaching the steel plate 1.

[0140] When the flow direction of the foreign matter on the bath surface is forward as a result of the determination in step S628, the processor 200 maintains the height of the nasal device 100 (S630). In this case, the processor 200 can maintain the height of the nasal device 100 by determining that the current working state in the ventilation tube part 110 is normal.

[0141] When the flow of the foreign matter on the bath surface is reversed as a result of the determination in step S628, the processor 200 lowers the height of the nasal device 100 (S632). In this case, because the foreign matter floating on the bath surface is in a state where the foreign matter is mixed into the barrier unit 120 and the barrier unit 120 is high, the processor 200 may lower the nasal device 100 so as to discharge the foreign matter on the bath surface to the outside of the barrier unit 120. Therefore, the foreign matter in the barrier unit 120 may be discharged to the outside of the barrier unit 120.

[0142] When the identified structure does not exist in a predetermined proportion or more as a result of the determination in step S624, the processor 200 lowers the nasal device 100 so that the structure exists in a predetermined proportion (S634). The fact that the structure does not exist in the image in a predetermined proportion or more means that the structure is largely immersed in the bathing surface. This means that the water level in the barrier unit 120 is very high. Therefore, it is necessary to discharge foreign matter on the bathing surface in the barrier unit 120 to the outside. In this case, because the barrier unit 120 is very high, the processor 200 can lower the nasal device 100 so as to discharge foreign matter on the bathing surface to the outside of the barrier unit 120. Therefore, foreign matter in the barrier unit 120 can be discharged to the outside of the barrier unit 120.

[0143] According to Embodiment 2, the nasal device is automatically controlled based on at least one of the following: the water level of the bath surface measured by the sensor, the structure in the vent part based on the image captured by the camera, and foreign matter on the bath surface. Therefore, the following effects can be achieved: the current working state in the vent part can be monitored in real time, so that the working convenience and quality stability can be ensured.

[0144] In addition, the water level change of the bath surface is monitored in real time by a sensor, the current working state inside the vent pipe component is monitored in real time by analyzing the image captured by the camera, and the raising or lowering of the nose device is controlled based on the monitoring result. It has the effect of preventing foreign matter from adhering to the steel plate during the hot dip galvanizing process and preventing processing failures and human errors.

[0145] In addition, the embodiments described in this specification may be implemented, for example, as methods or processes, devices, software programs, data streams or signals. Although the present invention has been discussed only in the context of a single embodiment (e.g., discussed only as a method), the embodiments of the features discussed may also be implemented in another form (e.g., a device or program). The device may be implemented as appropriate hardware, software or firmware. The method may be implemented in a device, such as a processor that is generally referred to as a processing device, such as a computer, a microprocessor, an integrated circuit or a programmable logic device. The processor includes a communication device (e.g., a computer, a cell phone, a mobile phone / personal digital assistant ("PDA")) and another device that facilitates information communication between end users.

[0146] The present invention has been described above with reference to the embodiments shown in the accompanying drawings, but these embodiments are illustrative only. It will be appreciated by those skilled in the art that various modifications and other equivalent embodiments may be obtained according to the embodiments. Therefore, the true technical protection scope of the present invention should be determined by the appended claims.

Claims

1. A nasal control system, comprising: A nose device configured such that one end is immersed in a plating bath containing a hot-dip galvanizing solution during the production of a steel sheet and the steel sheet is introduced into the plating bath, wherein the hot-dip galvanizing solution is used to coat the steel sheet with hot-dip galvanized steel sheet; a first sensor arranged at any part of the plating bath and capable of measuring a first water level of a bath surface of the hot dip galvanizing solution; as well as a processor configured to control the nasal device and the first sensor, Wherein the nasal device comprises: a snorkel member configured to surround a steel sheet introduced into a plating bath and guide the steel sheet so that the steel sheet is introduced into a hot-dip galvanizing solution contained in the plating bath through an opening formed at a bottom of the snorkel member, the opening being immersed in a bath surface of the plating bath; a stopper unit which is physically coupled to the outer wall portion of the vent pipe member as a detachable structure, can be driven along the outer wall of the vent pipe member based on information of a first water level of a bath surface of the hot-dip galvanizing liquid while operating in linkage with the first sensor, comprises a first stopper wall portion and a second stopper wall portion, and is configured to form an accommodation space, the first stopper wall portion being spaced apart from the inner wall portion of the vent pipe member by a predetermined distance and formed along the inner periphery of the vent pipe member so that the first stopper wall portion protrudes at a predetermined height in the height direction of the vent pipe member in an opening of the vent pipe member, the second stopper wall portion being spaced apart from the first stopper wall portion by a predetermined distance and exposed to the bath surface of the hot-dip galvanizing liquid, the accommodation space being capable of accommodating the hot-dip galvanizing liquid introduced through the opening between the inner wall portion of the vent pipe member and the first stopper wall portion and then flowing through the first stopper wall portion; and a pump unit installed outside the vent pipe member and configured to pump the hot-dip galvanizing liquid accommodated in the accommodation space of the baffle unit to a plating bath, The processor automatically controls the position of the stopper unit based on a difference between a first water level measured by the first sensor and a gap G between the first stopper wall portion so that the gap is continuously maintained.

2. A nasal control system, comprising: A nose device configured such that one end is immersed in a plating bath containing a hot-dip galvanizing solution during the production of a steel sheet and the steel sheet is introduced into the plating bath, wherein the hot-dip galvanizing solution is used to coat the steel sheet with hot-dip galvanized steel sheet; a first sensor arranged at any part of the plating bath and capable of measuring a first water level of a bath surface of the hot dip galvanizing solution; as well as a processor configured to control the nasal device and the first sensor, Wherein the nasal device comprises: a snorkel member configured to surround a steel sheet introduced into a plating bath and guide the steel sheet so that the steel sheet is introduced into a hot-dip galvanizing solution contained in the plating bath through an opening formed at a bottom of the snorkel member, the opening being immersed in a bath surface of the plating bath; a stopper unit, which is physically coupled to the outer wall portion of the vent pipe member as a detachable structure, can be driven along the outer wall of the vent pipe member based on information of a first water level of a bath surface of the hot-dip galvanizing liquid while operating in linkage with the first sensor, comprises a first stopper wall portion and a second stopper wall portion, and is configured to form an accommodation space, the first stopper wall portion being spaced apart from the inner wall portion of the vent pipe member by a predetermined distance and formed along the inner periphery of the vent pipe member so that the first stopper wall portion protrudes at a predetermined height in the opening of the vent pipe member in a height direction of the vent pipe member, the second stopper wall portion being spaced apart from the first stopper wall portion by a predetermined distance and exposed to the bath surface of the hot-dip galvanizing liquid, the accommodation space being capable of accommodating the hot-dip galvanizing liquid introduced through the opening between the inner wall portion of the vent pipe member and the first stopper wall portion and then flowing through the first stopper wall portion; a camera module installed in the vent pipe member, arranged at any portion of the stopper unit, and capable of identifying foreign matter floating on a bath surface of a hot-dip galvanizing solution; and a pump unit installed outside the vent pipe member and configured to pump the hot-dip galvanizing liquid accommodated in the accommodation space of the baffle unit to a plating bath, The processor controls the position of the stopper unit or adjusts the load of the pump unit based on information obtained by learning an image of the foreign matter using the camera module, so that the moving foreign matter is suppressed from mixing into the steel plate.

3. The nasal control system according to claim 1 or 2, wherein: The processor receives a sensing signal from the first sensor, and The spacing is continuously controlled based on the sensing signal by raising or lowering the stopper unit so that the depth of the stopper unit immersed in the plating bath can be adjusted, or by adjusting the load of the pump unit so that the flow rate of the hot-dip galvanizing liquid pumped by the pump unit can be controlled.

4. The nasal control system according to claim 3, wherein: The processor deriving information of a distance G between a protruding portion protruding to the first stopper wall portion and a bath surface of the hot-dip galvanizing liquid by combining information of a first water level of the bath surface of the hot-dip galvanizing liquid obtained via the first sensor with information of a position of the stopper unit, and The distance is continuously maintained by controlling the position of the stopper unit based on derived information about the distance and information about the load of the pump unit.

5. The nasal control system of claim 4, wherein: The stopper unit is configured in the form of a slide rail and is physically coupled to the outer wall portion of the vent member, and A driving device for driving the baffle unit is connected to any part of the nose device so as to minimize the influence of thermal energy transferred to the plating bath.

6. The nasal control system according to claim 4, wherein: The processor increasing the depth of the first stopper wall portion of the stopper unit immersed in the plating bath by lowering the stopper unit when the information of the interval is less than a preset reference, and When the information of the interval is greater than a preset reference water level, the depth of the first barrier wall portion of the barrier unit immersed in the plating bath is reduced by raising the barrier unit.

7. The nasal control system according to claim 1 or 2, wherein: The nose device further includes a second sensor installed on either side of the inner space of the vent pipe member and configured to detect information on the position of the stopper unit or measure a second water level of a bath surface of the hot-dip galvanizing liquid flowing through the stopper wall portion and accommodated in the accommodation space of the stopper unit.

8. The nasal control system according to claim 7, wherein: The processor controls the distance between the second water level and the first water level to always have a set value or a larger value through the second sensor, so that the hot-dip galvanizing liquid will not flow back from the accommodating space of the baffle unit to the opening of the vent pipe component.

9. The nasal control system according to claim 1 or 2, wherein: The pump unit comprises: a housing portion installed at a position corresponding to the stopper unit outside the vent pipe member, configured to have therein a pumping space connected to the accommodation space of the stopper unit so that the pumping space communicates with the accommodation space, and configured to have an outlet formed at one side thereof so that the hot-dip galvanizing liquid introduced from the accommodation space to the pumping space is discharged into a plating bath; an impeller portion rotatably mounted in the pumping space of the housing portion and configured to drive the hot-dip galvanizing liquid introduced into the pumping space to flow toward the outlet by rotation thereof; and A driving motor is installed at one side of the housing portion, connected to a rotating shaft of the impeller portion, and configured to drive the impeller portion to rotate.

10. The nasal control system of claim 2, wherein: The nose device further includes a gas supply part formed on one side of the camera module and a gas suction part formed on the other side of the camera module to prevent zinc vapor generated by the hot-dip galvanizing solution from being fixed to the lens of the camera module, and The zinc vapor is removed by an inert gas which moves to the surface of the lens through the gas supply part and is absorbed by the gas suction part.

11. The nasal control system according to claim 2, wherein: Zinc vapor generated by hot-dip galvanizing solution is removed by adding a swirl flow to the inert gas moving to the lens surface of the camera module to prevent the zinc vapor from being fixed to the lens of the camera module.

12. A nasal control system comprising: a nose device which is immersed in a plating bath containing hot-dip galvanizing solution and which introduces the steel sheet into the plating bath; as well as a processor connected to the nasal device, wherein the processor identifies a difference between a height of a water level measured by a sensor for measuring a water level of a bath surface of a hot-dip galvanizing solution and a height of a stopper unit of the nose device, identifies at least one of a structure in a vent pipe component and a foreign object on the bath surface based on an image captured by a camera device installed in the nose device, and controls the nose device based on at least one of the identified height difference, the identified structure in the vent pipe component, and the identified foreign object on the bath surface.

13. The nasal control system according to claim 12, wherein: The processor identifies the flow of foreign matter on the bath surface by applying optical flow to the image, the foreign matter floating on the bath surface within the vent pipe component and approaching the steel plate.

14. The nasal control system of claim 13, wherein: The processor indicates a first color when foreign matter is mixed into the bath surface in the vent pipe component, and indicates a second color when foreign matter is discharged from the bath surface in the vent pipe component to the outside of the baffle unit, so that the current working state in the vent pipe component can be monitored in real time.

15. The nasal control system of claim 12, wherein: The processor maintains the height of the nose device when the difference in height is equal to or greater than a preset reference value, a preset structure exists in the image at a preset predetermined ratio or more, and a flow direction of foreign matter on the bath surface is a forward direction.

16. The nasal control system of claim 12, wherein: When the height difference is equal to or greater than a preset reference value, the preset structure exists in the image at a predetermined ratio or greater, and the flow direction of foreign matter on the bath surface is reverse, the processor raises the height of the nasal device so that the foreign matter on the bath surface is discharged to the outside of the baffle unit.

17. The nasal control system of claim 12, wherein: When the difference in height is equal to or greater than a preset reference value and the structure does not exist in the image at a predetermined ratio or more, the processor raises the nasal device so that the structure exists in the image at a predetermined ratio or more.

18. The nasal control system of claim 12, wherein: The processor maintains the height of the nose device when the difference in height is less than a preset reference value, the structure exists in the image at a predetermined ratio or more, and the flow direction of the foreign matter on the bath surface is a forward direction.

19. The nasal control system of claim 12, wherein: When the height difference is less than a reference value, the structure exists in the image at a predetermined ratio or greater, and the flow direction of foreign matter on the bath surface is reversed, the processor lowers the height of the nose device so that the foreign matter on the bath surface is discharged to the outside of the baffle unit.

20. The nasal control system of claim 12, wherein: When the difference in height is less than a reference value and the structure does not exist in the image at a predetermined ratio or more, the processor lowers the nasal device so that the structure exists at a predetermined ratio or more.

Images