A control method, device, medium and electronic equipment for RH furnace ladle lifting

Abstract

The present application provides a method, device, medium, and electronic device for controlling the lifting of a ladle in an RH furnace. The method comprises: obtaining the bright surface area of ​​the molten steel surface in the ladle; controlling the ladle to perform a first lifting; when the bright surface area reaches a preset area, controlling the ladle to stop the first lifting, and using the lifting height at the time of stopping the first lifting as the lifting zero point; controlling the ladle to perform a second lifting based on the lifting zero point, and stopping the second lifting when the ladle reaches the target lifting height, so as to perform vacuum smelting of the molten steel. The present application solves the problems of inaccurate judgment of the ladle lifting zero point and large errors in judging the immersion depth of the dip tube. The proposed solution can accurately determine the lifting zero point of the RH furnace ladle, thereby improving the control accuracy of the immersion depth of the dip tube in the molten steel in the RH furnace vacuum chamber, avoiding affecting the quality of the molten steel and causing damage to the molten steel smelting equipment, and greatly improving the efficiency of the molten steel smelting process.

Description

Technical Field

[0001] The present application relates to the technical field of steelmaking, and in particular to a control method, device, medium and electronic equipment for lifting the ladle of an RH furnace. Background Art

[0002] During the steelmaking process, controlling the immersion depth of the immersion tube in the RH furnace vacuum chamber is crucial. Too shallow an immersion depth can lead to poor circulation or slag suction accidents; too deep an immersion depth can cause molten steel to fuse the circulation pipes or overflow the ladle, among other abnormalities. Currently, methods for controlling the immersion tube's immersion depth rely primarily on manual determination of the ladle's zero point of lift. Traditional clearance measurement methods, such as laser ranging and radar level gauges, suffer from low accuracy in harsh environments, making precise detection impossible.

[0003] Based on this, how to take effective methods to accurately determine the lifting zero point of the RH furnace ladle to improve the control accuracy of the immersion depth of the RH furnace vacuum chamber immersion tube into the molten steel, avoid affecting the quality of the molten steel and causing damage to the smelting equipment, is a technical problem that needs to be solved urgently. Summary of the Invention

[0004] The purpose of the present application is to provide a control method, device, medium and electronic equipment for the lifting of the RH furnace ladle. The present application can solve the problems of inaccurate judgment of the ladle lifting zero point and large error in judgment of the immersion depth of the immersion tube. The solution proposed in the present application can accurately judge the lifting zero point of the RH furnace ladle, so as to improve the control accuracy of the immersion depth of the immersion tube in the molten steel of the RH furnace vacuum chamber, avoid affecting the quality of the molten steel and causing damage to the molten steel smelting equipment, and greatly improve the efficiency of the molten steel smelting process.

[0005] Specifically, this application adopts the following technical solutions:

[0006] According to one aspect of an embodiment of the present application, a method for controlling the lifting of an RH furnace ladle is provided, the method comprising: obtaining the bright surface area of ​​the molten steel surface in the ladle; controlling the ladle to perform a first lifting, and when the bright surface area reaches a preset area, controlling the ladle to stop the first lifting, and taking the lifting height when the ladle stops the first lifting as the lifting zero point; controlling the ladle to perform a second lifting based on the lifting zero point, and stopping the second lifting when the ladle is lifted to a target lifting height, so as to perform vacuum smelting treatment of the molten steel.

[0007] In some embodiments of the present application, based on the aforementioned scheme, obtaining the bright surface area of ​​the molten steel surface in the ladle includes: obtaining a surface image of the molten steel surface in the ladle; processing the surface image, and calculating the bright surface area of ​​the molten steel surface in the surface image.

[0008] In some embodiments of the present application, based on the aforementioned solution, a surface image of the molten steel surface in the ladle is obtained by a camera device.

[0009] In some embodiments of the present application, based on the aforementioned scheme, when controlling the ladle to perform the first lifting, the method also includes: obtaining brightness information of the molten steel surface in the ladle, and determining a grayscale threshold based on the brightness information; when the lifting height of the ladle is less than the height threshold, adjusting the grayscale threshold; when the lifting height of the ladle is greater than or equal to the height threshold, the grayscale threshold remains unchanged.

[0010] In some embodiments of the present application, based on the aforementioned scheme, the adjustment of the grayscale threshold includes: if the bright surface area is larger than the set bright surface area, then increasing the grayscale threshold; if the bright surface area is smaller than the set bright surface area, then decreasing the grayscale threshold so that the bright surface area is equal to the set bright surface area.

[0011] In some embodiments of the present application, based on the aforementioned solution, the height threshold is 800 mm.

[0012] In some embodiments of the present application, based on the aforementioned scheme, before controlling the ladle to perform a second lifting based on the lifting zero point, the method also includes: obtaining steel grade information of the molten steel in the ladle; and determining the lifting height of the ladle for the second lifting based on the steel grade information.

[0013] According to one aspect of an embodiment of the present application, a control device for lifting the ladle of an RH furnace is provided, characterized in that the device includes: an acquisition unit, used to obtain the bright surface area of ​​the molten steel surface in the ladle; a first control unit, used to control the ladle to perform a first lifting, and when the bright surface area reaches a preset area, control the ladle to stop the first lifting, and use the lifting height when the ladle stops the first lifting as the lifting zero point; a second control unit, used to control the ladle to perform a second lifting based on the lifting zero point, and stop the second lifting when the ladle is lifted to the target lifting height, so as to perform vacuum smelting treatment of the molten steel.

[0014] According to one aspect of an embodiment of the present application, a computer-readable storage medium is provided, in which at least one program code is stored. The at least one program code is loaded and executed by a processor to implement the operations performed by the control method for lifting the RH furnace ladle as described above.

[0015] According to one aspect of an embodiment of the present application, an electronic device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the operations performed by the control method for lifting the RH furnace ladle as described above.

[0016] It can be seen from the above technical solution that this application has at least the following advantages and positive effects:

[0017] By adopting the solution proposed in this application, the problem of inaccurate judgment of the ladle lifting zero point and large error in judgment of the immersion depth of the immersion tube can be solved. The solution proposed in this application can accurately judge the lifting zero point of the RH furnace ladle, so as to improve the control accuracy of the immersion depth of the immersion tube of the RH furnace vacuum chamber into the molten steel, avoid affecting the quality of the molten steel and causing damage to the molten steel smelting equipment, and greatly improve the efficiency of the molten steel smelting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in this application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A flow chart of a method for controlling the lifting of a ladle in an RH furnace according to one embodiment of the present application is shown;

[0020] Figure 2 A structural block diagram of a control device for lifting a ladle of an RH furnace in one embodiment of the present application is shown;

[0021] Figure 3 A schematic diagram of the structure of a computer system suitable for implementing an electronic device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0022] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0023] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner.In the following description, many specific details are provided so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps etc. can be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0024] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual execution order may vary depending on the actual situation.

[0025] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described.

[0026] In this application, the RH furnace is one of the main equipment for off-furnace refining, and the main production process of the RH furnace is as follows: the ladle car transports the ladle from the ladle hanging station to the processing station, and the control system lifts the ladle car and the ladle together to the processing position, and then the molten steel is vacuum treated, including forced decarburization, secondary combustion, chemical heating, final deoxidation and alloy fine-tuning, etc. After the molten steel is treated, the hydraulic system lowers the ladle car and the ladle together to the transport track, and finally the ladle car transports the ladle to the ladle hanging station for the next process. At present, when the RH furnace ladle is lifted, the only way is to manually judge the RH furnace ladle lifting zero point and control the depth of the immersion tube inserted into the molten steel. During the entire processing process, the operator needs to observe the depth of the immersion tube immersed in the molten steel at any time. There are problems such as inaccurate judgment of the ladle lifting zero point and large error in judging the immersion depth of the immersion tube. The present application provides a control method, device, medium and electronic equipment for the lifting of an RH furnace ladle, which can solve the above-mentioned problems. The present application adopts an effective method to accurately determine the lifting zero point of the RH furnace ladle, so as to improve the precise control of the depth of the immersion tube of the RH furnace vacuum chamber inserted into the molten steel, avoid affecting the quality of the molten steel and causing damage to the molten steel smelting equipment, and greatly improve the efficiency of the molten steel smelting process.

[0027] The following is a detailed description of the implementation details of the technical solution of the embodiment of the present application:

[0028] Reference Figure 1 , Figure 1 This is a flow chart of a control method for lifting the RH furnace ladle in one embodiment of the present application.

[0029] According to a typical embodiment of the present application, a method for controlling the lifting of a RH furnace ladle is provided, the method comprising the following steps S1 to S3:

[0030] Step S1, obtaining the bright surface area of ​​the molten steel surface in the ladle.

[0031] In this application, it is necessary to first obtain the bright surface area of ​​the molten steel surface in the ladle. The bright surface area is the bright surface area presented when the molten steel surface in the ladle is detected at a certain temperature. The brightness of the molten steel surface may also be different for different steel types.

[0032] Step S2, controlling the ladle to perform the first lifting, and when the bright surface area reaches a preset area, controlling the ladle to stop the first lifting, and taking the lifting height when the ladle stops the first lifting as the lifting zero point.

[0033] In the present application, after the ladle filled with molten steel is transported to the processing station, the bright surface area of ​​the molten steel surface is obtained, and the ladle is controlled to perform the first lifting. It should be noted here that the ladle car can be controlled to lift upward together with the ladle through a PLC control device. During the upward lifting process, the bright surface area of ​​the molten steel surface in the ladle is still obtained in real time. When the ladle is controlled to perform the first lifting, when the bright surface area reaches a preset area, it means that the dip tube of the RH furnace vacuum chamber has come into contact with the dip tube in the ladle. It can be understood that when the dip tube comes into contact with the slag on the surface of the molten steel, the slag will diffuse, and the molten steel will be exposed to the field of view, causing the bright surface area of ​​the molten steel surface to change suddenly (the bright surface area increases). When it is identified that the bright surface area of ​​the molten steel surface reaches the preset area, the ladle is controlled to stop the first lifting, and the lifting height when the ladle stops the first lifting is recorded, which is used as the lifting zero point. The jacking zero point can be determined by the jacking zero point judgment module, and the contact position between the slag on the molten steel surface and the vacuum chamber immersion tube can be judged according to the sudden change of the bright surface area (or the sudden change of the bright surface brightness), thereby determining the jacking zero point.

[0034] Step S3, controlling the ladle to perform a second lifting based on the lifting zero point, and stopping the second lifting when the ladle is lifted to a target lifting height to perform vacuum smelting of the molten steel.

[0035] In the present application, after the ladle stops lifting for the first time, the lifting height when the ladle stops lifting for the first time is taken as the lifting zero point, and then the ladle is controlled to perform a second lifting based on the lifting zero point, and the second lifting is stopped when the second lifting reaches the target lifting height. At this time, it is determined that the immersion tube of the RH furnace vacuum chamber has been inserted into the most suitable depth in the molten steel, and vacuum smelting treatment of the molten steel can be carried out.

[0036] In one embodiment of the present application, obtaining the bright surface area of ​​the molten steel surface in the ladle includes:

[0037] Acquire a surface image of the molten steel surface in the ladle.

[0038] The surface image is processed, and the bright surface area of ​​the molten steel surface in the surface image is calculated.

[0039] In the present application, during the ladle lifting process, it is necessary to obtain the bright surface area of ​​the molten steel surface in the ladle in real time. A camera device can be used to obtain a surface image of the molten steel surface in the ladle in real time, and then the surface image is processed in real time to calculate the bright surface area of ​​the molten steel surface in the surface image. When acquiring the image, the ROI area of ​​the immersion tube area can be set to avoid interference from the surrounding environment and other factors, so that the acquired image is a valid image. When performing image processing, the surface image can be processed by image processing software, and the grayscale change of the molten steel surface (i.e., the change of the bright surface area of ​​the molten steel surface) can be analyzed to facilitate the determination of the lifting zero point.

[0040] In the present application, it should be noted that when it is identified that the bright surface area of ​​the molten steel surface reaches a preset area, the ladle is controlled to stop the first lifting, and the lifting height when the ladle stops the first lifting is used as the lifting zero point. However, due to interference from human factors or other factors, the brightness of the molten steel surface may suddenly change, so that the identified bright surface area reaches the preset area. For example, the charging worker adds material to the ladle, causing the molten steel to diffuse, and the bright surface area of ​​the molten steel surface suddenly increases, which may lead to an erroneous judgment of the position of the lifting zero point. If the result of the first judgment is auxiliary detected, the above problem can be avoided. The result of the first judgment can be auxiliary detected by the environmental ROI detection module, and the judgment of the lifting zero point of the RH furnace ladle can be auxiliary detected to avoid erroneous judgment, thereby further ensuring the accuracy of the judgment result.

[0041] In one embodiment of the present application, a surface image of the molten steel surface in the ladle can be obtained by a camera device, and the camera device can be a digital high-definition camera installed on the RH furnace smelting platform. The camera device can also include an image acquisition module. The monitoring range of the camera device can cover the vacuum chamber immersion tube area, and the resolution of the surface image of the molten steel surface in the ladle obtained by the camera device can be 1080p.

[0042] In one embodiment of the present application, when controlling the ladle to perform the first lifting, the method further includes:

[0043] Brightness information of the molten steel surface in the ladle is obtained, and a grayscale threshold is determined according to the brightness information.

[0044] When the lifting height of the ladle is less than a height threshold, the grayscale threshold is adjusted.

[0045] When the lifting height of the ladle is greater than or equal to the height threshold, the grayscale threshold remains unchanged.

[0046] In the present application, when controlling the ladle to perform the first lifting, the distance of the first lifting is the distance from the time the ladle filled with molten steel is transported to the processing station and lifted upward until the immersion pipe contacts the slag on the surface of the molten steel, so that the bright surface area of ​​the molten steel surface reaches a preset area. However, since the bright surface area of ​​different steel grades may be different, in order to avoid the surface brightness of some steel grades being too dark, the bright surface area of ​​the molten steel surface still does not reach the preset area when the immersion pipe contacts the slag on the surface of the molten steel. Therefore, when the ladle filled with molten steel is transported to the processing station, the brightness information of the molten steel surface in the ladle is obtained, and the grayscale threshold is determined based on the brightness information, which is also convenient for calculating the bright surface area of ​​the molten steel surface in the ladle.

[0047] In the present application, after the grayscale threshold is determined based on the brightness information, the bright surface area of ​​the molten steel surface in the ladle is calculated, and it is judged whether the bright surface area of ​​the molten steel surface in the ladle can reach the preset area when the immersion tube contacts the slag on the surface of the molten steel. When the lifting height of the ladle is less than the height threshold, in order to adapt to the different bright surface areas of the molten steel surface due to different steel grades, the grayscale threshold can be adjusted. The grayscale threshold adjustment module can be used to automatically adjust the grayscale threshold so that the bright surface areas of molten steel surfaces of different steel grades are maintained at the same area. It can also be understood as ensuring that the bright surface areas of molten steel surfaces of different brightness are maintained at fixed pixels to adapt to molten steel surfaces of different brightness. The fixed pixels can be 20,000 pixels or other pixels. This application does not specifically limit this and can be adjusted according to actual needs.

[0048] In the present application, when the lifting height of the ladle is greater than or equal to the height threshold, the grayscale threshold remains unchanged, and the bright surface area of ​​the molten steel surface in the set immersion tube ROI area is monitored at a certain grayscale threshold. When the bright surface area exceeds the preset area, the ladle is controlled to stop the first lifting, and the lifting height when the ladle stops the first lifting is determined as the lifting zero point position, and a lifting zero point signal is sent to the PLC control device (the zero point signal can be used by the PLC control device to control the ladle to perform a second lifting based on the lifting zero point), and all detection parameters are initialized at the same time to wait for the next detection.

[0049] In one embodiment of the present application, adjusting the grayscale threshold includes:

[0050] If the bright surface area is larger than the set bright surface area, the grayscale threshold is increased.

[0051] If the bright surface area is smaller than the set bright surface area, the grayscale threshold is adjusted downward to make the bright surface area equal to (or close to) the set bright surface area.

[0052] In the present application, when adjusting the grayscale threshold, if the bright surface area is greater than the set bright surface area, the grayscale threshold is adjusted upward. For example, the grayscale threshold corresponding to the bright surface area of ​​the molten steel surface in the ladle is 150, but when the bright surface area calculated according to the grayscale threshold (150) is greater than the set bright surface area, the grayscale threshold is adjusted upward. The grayscale threshold can be gradually increased. Assuming that when the grayscale threshold is increased to 155, the bright surface area calculated when the grayscale threshold is 155 reaches the set bright surface area, the grayscale threshold at this time meets the requirement that the bright surface area reaches (or is close to) the set bright surface area.

[0053] In the present application, when adjusting the grayscale threshold, if the bright surface area is less than the set bright surface area, the grayscale threshold is lowered. For example, the grayscale threshold corresponding to the bright surface area of ​​the molten steel surface in the ladle is 150, but when the bright surface area calculated according to the grayscale threshold (150) is less than the set bright surface area, the grayscale threshold is lowered. The grayscale threshold can be gradually reduced. Assuming that when the grayscale threshold is lowered to 146, the bright surface area calculated according to the grayscale threshold of 146 reaches the set bright surface area, the grayscale threshold at this time meets the requirement that the bright surface area reaches the set bright surface area. By automatically adjusting the grayscale threshold, the initial molten steel surface with different brightness is adapted, and the detection accuracy is improved.

[0054] In one embodiment of the present application, the height threshold may be 800 mm.

[0055] In one embodiment of the present application, before controlling the ladle to perform a second lifting based on the lifting zero point, the method further includes:

[0056] Get the steel grade information of the molten steel in the ladle.

[0057] The lifting height of the ladle for the second lifting is determined according to the steel grade information.

[0058] In the present application, before controlling the ladle to perform a second lifting based on the lifting zero point, it is also necessary to obtain the steel grade information of the molten steel in the ladle. For different steel grades, the lifting height of the ladle for the second lifting based on the lifting zero point is also different. The lifting height of the ladle for the second lifting can be determined based on the steel grade information. For example, based on the steel grade information of a certain steel grade, the lifting height of the ladle for the second lifting is determined to be 150 mm, then the ladle is controlled to be lifted 150 mm based on the lifting zero point. When the ladle is lifted 150 mm based on the lifting zero point, the vacuum smelting treatment of the molten steel begins. The ladle is lifted a second time based on the lifting zero point, which can improve the control accuracy of the depth of the immersion tube of the RH furnace vacuum chamber immersed in the molten steel, avoiding the situation where the immersion depth of the immersion tube of the RH furnace vacuum chamber in the molten steel is too shallow, resulting in poor circulation or slag suction accidents; the immersion depth of the immersion tube of the RH furnace vacuum chamber in the molten steel is too deep, resulting in abnormal situations such as the molten steel fusing damage to the circulation air pipe or the molten steel overflowing from the ladle, thereby greatly improving the efficiency of the molten steel smelting process.

[0059] In the present application, since the RH furnace vacuum chamber immersion tube includes two immersion tubes of equal length, after the smelting process of the molten steel is completed, the ladle is controlled to descend and the immersion tube is separated from the molten steel. During the detachment, residual slag may adhere to the surface of the immersion tube. If the slag cools quickly, it will form a conical iron block concentrated on the end of the immersion tube. When the vacuum chamber is baked, the conical iron block attached to the end of the immersion tube may not melt completely, which may cause inaccurate judgment of the jacking zero point. When it is determined that the ladle jacking has reached the jacking zero point, in fact, the ladle jacking has not reached the jacking zero point (but the conical iron block attached to the end of the immersion tube contacts the slag on the surface of the molten steel, and the RH furnace vacuum chamber immersion tube does not contact the slag on the surface of the molten steel).

[0060] In order to ensure that both dip tubes in the RH furnace vacuum chamber dip tube contact the slag on the surface of the molten steel, a recognition model can be embedded in the image acquisition module (the recognition model can be obtained by training the YOLO model). After determining the jacking zero point, the recognition model is used to locate the RH furnace vacuum chamber dip tube and calculate the height difference between the two dip tubes (the height of the dip tube includes the sum of the height of the dip tube itself and the height of the conical iron block attached to the end of the dip tube. The recognition model can be used to perform contour recognition on the dip tube to calculate the height difference between the two dip tubes). If the RH furnace vacuum chamber dip tube does not fully contact the slag on the surface of the molten steel, the height difference between the two dip tubes is compensated, and the height difference between the two dip tubes is added to the determined jacking zero point to serve as the new jacking zero point. Then, the second jacking is performed based on the new jacking zero point to ensure the accuracy of the jacking zero point judgment.

[0061] In this application, PYQT can be used to design an application interface, which can be connected to a PLC control device to facilitate acquisition of the steel grade information of the molten steel in the ladle, furnace number information, location information of the ladle car, lifting height information of the ladle car, etc. After acquiring these data information, they can be combined with the lifting zero point of the RH furnace ladle in each batch, and the depth of the immersion of the RH furnace vacuum chamber immersion tube in the molten steel to record and save them, so as to facilitate subsequent historical data query and analysis, and provide a data source for subsequent production information settlement queries, so as to guide production operation plans.

[0062] The specific implementation methods of the present application are further illustrated below through specific examples, but the specific implementation methods of the present application are not limited to the following examples.

[0063] Figure 2 1 is a structural block diagram of a control device for lifting a ladle of an RH furnace according to an embodiment of the present application.

[0064] Reference Figure 2 As shown, according to an embodiment of the present application, a control device 200 for lifting a ladle of an RH furnace includes: an acquisition unit 201 , a first control unit 202 , and a second control unit 203 .

[0065] The acquisition unit 201 is used to acquire the bright surface area of ​​the molten steel surface in the ladle.

[0066] The first control unit 202 is used to control the ladle to perform the first lifting. When the bright surface area reaches the preset area, the ladle is controlled to stop the first lifting, and the lifting height when the ladle stops the first lifting is used as the lifting zero point.

[0067] The second control unit 203 is used to control the ladle to perform a second lifting based on the lifting zero point, and stop the second lifting when the ladle is lifted to the target lifting height to perform vacuum smelting of molten steel.

[0068] Reference Figure 3 , Figure 3 A schematic diagram of the structure of a computer system suitable for implementing an electronic device according to an embodiment of the present application is shown.

[0069] like Figure 3As shown, the computer system 300 includes a central processing unit (CPU) 301, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 302 or the program loaded from the storage part 308 to the random access memory (RAM) 303, such as executing the method described in the above embodiment. Various programs and data required for system operation are also stored in the RAM 303. The CPU 1101, ROM 302 and RAM 303 are connected to each other via a bus 304. An input / output (I / O) interface 305 is also connected to the bus 304.

[0070] The following components are connected to the I / O interface 305: an input section 306 including a keyboard, a mouse, and the like; an output section 307 including devices such as a cathode ray tube (CRT), a liquid crystal display (LCD), and a speaker; a storage section 308 including a hard disk and the like; and a communication section 309 including a network interface card such as a LAN (Local Area Network) card or a modem. The communication section 309 performs communication processing via a network such as the Internet. A drive 310 is also connected to the I / O interface 305 as needed. Removable media 311, such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, is installed in the drive 310 as needed, so that computer programs read therefrom can be installed into the storage section 308 as needed.

[0071] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via the communication section 309, and / or installed from a removable medium 311. When the computer program is executed by the central processing unit (CPU) 301, the various functions defined in the system of the present application are executed.

[0072] It should be noted that the computer-readable medium shown in the embodiments of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device. In the present application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wired, or any suitable combination thereof.

[0073] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. Among them, each box in the flowchart or block diagram can represent a module, program segment, or part of the code, and the above-mentioned module, program segment, or part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0074] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. In some cases, the names of these units do not constitute limitations on the units themselves.

[0075] According to a typical embodiment of the present application, the present application also proposes a computer-readable storage medium, in which at least one program code is stored. The at least one program code is loaded and executed by a processor to implement the operations performed by the control method for lifting the RH furnace ladle as described above.

[0076] According to a typical embodiment of the present application, the present application also proposes an electronic device, which includes a memory and a processor, and the memory stores a computer program, and is characterized in that when the processor executes the computer program, it implements the operations performed by the control method for lifting the RH furnace ladle as described above.

[0077] It should be noted that, although several modules or units of the device for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiment of the application, the features and functions of two or more modules or units described above can be concretized in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into multiple modules or units to be concretized.

[0078] It can be seen from the above technical solution that this application has at least the following advantages and positive effects:

[0079] First, the solution proposed in this application can solve the problems of inaccurate judgment of the ladle lifting zero point and large error in judging the immersion depth of the immersion tube. The solution proposed in this application can accurately judge the lifting zero point of the RH furnace ladle, so as to improve the control accuracy of the immersion depth of the immersion tube in the molten steel of the RH furnace vacuum chamber, avoid affecting the quality of the molten steel and causing damage to the molten steel smelting equipment, and greatly improve the efficiency of the molten steel smelting process.

[0080] Secondly, by adopting the solution proposed in this application, image processing technology is used to obtain the surface image and brightness information of the molten steel surface in the ladle, and the bright surface area of ​​the molten steel surface is calculated, which can greatly reduce the workload and greatly improve the accuracy of image acquisition.

[0081] Thirdly, by adopting the solution proposed in this application, an environmental ROI detection module is added to perform auxiliary detection on the determination of the lifting zero point of the RH furnace ladle to avoid misjudgment, thereby further ensuring the accuracy of the judgment result.

[0082] Fourthly, by adopting the solution proposed in this application, automatic control of the lifting height is achieved through communication with the on-site PLC, which simplifies the operating process and improves production efficiency.

[0083] Although the present application has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present application can be embodied in various forms without departing from the spirit or substance of the application, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, and all changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A method for controlling the lifting of a RH furnace ladle, characterized in that: The method comprises: Obtain the bright surface area of ​​the molten steel surface in the ladle; Controlling the ladle to perform a first lifting, and when the bright surface area reaches a preset area, controlling the ladle to stop the first lifting, and taking the lifting height of the ladle when the first lifting is stopped as the lifting zero point; Controlling the ladle to perform a second lifting based on the lifting zero point, and stopping the second lifting when the ladle is lifted to a target lifting height to perform vacuum smelting of the molten steel; When controlling the ladle to perform the first lifting, the method further includes: Obtaining brightness information of the surface of the molten steel in the ladle, and determining a grayscale threshold based on the brightness information; When the lifting height of the ladle is less than a height threshold, adjusting the grayscale threshold; When the lifting height of the ladle is greater than or equal to the height threshold, the grayscale threshold remains unchanged; The adjusting the grayscale threshold comprises: If the bright surface area is greater than the set bright surface area, the grayscale threshold is increased; If the bright surface area is smaller than the set bright surface area, the grayscale threshold is adjusted downward to make the bright surface area equal to the set bright surface area.

2. The method according to claim 1, characterized in that The step of obtaining the bright surface area of ​​the molten steel surface in the ladle comprises: Acquire a surface image of the molten steel surface in the ladle; The surface image is processed, and the bright surface area of ​​the molten steel surface in the surface image is calculated.

3. The method according to claim 2, characterized in that The surface image of the molten steel surface in the ladle is obtained by a camera device.

4. The method according to claim 1, wherein The height threshold is 800 mm.

5. The method according to claim 1, wherein Before controlling the ladle to perform a second lifting based on the lifting zero point, the method further includes: Get the steel grade information of the molten steel in the ladle; The lifting height of the ladle for the second lifting is determined according to the steel grade information.

6. A control device for lifting the ladle of an RH furnace, characterized in that: The device comprises: An acquisition unit is used to acquire the bright surface area of ​​the molten steel surface in the ladle; a first control unit, configured to control the ladle to perform a first lifting, and when the bright surface area reaches a preset area, control the ladle to stop the first lifting, and use the lifting height when the ladle stops the first lifting as the lifting zero point; a second control unit, configured to control the ladle to perform a second lifting based on the lifting zero point, and to stop the second lifting when the ladle reaches a target lifting height, so as to perform vacuum smelting of the molten steel; When controlling the ladle to lift for the first time, the method further includes: Obtaining brightness information of the surface of the molten steel in the ladle, and determining a grayscale threshold based on the brightness information; When the lifting height of the ladle is less than a height threshold, adjusting the grayscale threshold; When the lifting height of the ladle is greater than or equal to the height threshold, the grayscale threshold remains unchanged; The adjusting the grayscale threshold comprises: If the bright surface area is greater than the set bright surface area, the grayscale threshold is increased; If the bright surface area is smaller than the set bright surface area, the grayscale threshold is adjusted downward to make the bright surface area equal to the set bright surface area.

7. A computer-readable storage medium, characterized in that At least one program code is stored in the computer-readable storage medium, and the at least one program code is loaded and executed by the processor to implement the operations performed by the method according to any one of claims 1 to 5.

8. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the processor implements the operations performed by the method according to any one of claims 1 to 5.

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