Method and device for automatically measuring thickness of converter bottom

Abstract

The invention discloses a method and device for automatically measuring the thickness of the bottom of a converter, and relates to the technical field of laser measurement. Real-time images are collected and input into the converter angle recognition model; when the angle of the converter is equal to the preset angle and the converter stops, the laser ranging module is used for measuring the bottom of the converter for preset time, measured data are sent to the control processing module, the control processing module is used for processing the data, and the vertical distance L1 from the measuring device to the bottom of the converter is obtained; according to the formula D = H-(L1-L0), the current thickness of the furnace bottom is obtained through calculation; wherein H represents the height of the converter, and L0 represents the vertical distance from the measuring device to the furnace mouth. The converter angle can be automatically identified by using the converter angle identification model, the measurement is automatically started after the converter rotates to the preset angle, and the measurement of the center thickness of the converter bottom is quickly completed, so that the measurement of the thickness of the converter bottom can be completed in the gap between two times of steelmaking.

Description

Technical Field

[0001] The invention relates to the technical field of laser thickness measurement, and in particular to a method and a device for automatically measuring the thickness of a converter bottom. Background Art

[0002] Converter steelmaking is the most common steelmaking method in modern steel mills and occupies a dominant position in my country's steel production. In the process of converter steelmaking, the temperature of molten steel is as high as 1600℃. In order to protect the converter, refractory bricks with a thickness of about 1m will be laid inside the converter. This layer of refractory material is called the lining. However, during the oxygen blowing smelting process, high-temperature molten steel, slag and other substances are in contact with the lining for a long time, which will cause damage to the lining. Once the thickness of the lining is lower than the safe value, safety accidents such as steel penetration are prone to occur. The thickness of the converter bottom is an important parameter for evaluating the safety of the converter. By measuring the thickness of the converter bottom, the degree of damage to the current converter lining can be determined, and the staff can be assisted in deciding whether to repair the furnace or shut down the furnace for maintenance, thereby ensuring the safety of the steelmaking process.

[0003] The existing furnace lining measurement methods mainly include thickness gauge scanning and measuring rod direct measurement. The thickness gauge scanning mainly pushes the thickness gauge to a position 3-4m in front of the converter mouth, and after manual positioning, scans the inner wall of the converter. This method can scan most points of the furnace lining, but the scanning time is very long, generally requiring nearly half an hour, which will seriously affect the steelmaking efficiency and is not suitable for frequent use. Moreover, the thickness gauge is expensive, which is unaffordable for most small and medium-sized steel mills. The measuring rod direct measurement is to manually hold or push a scaled measuring rod with a cart after pouring out the molten steel, put one end into the furnace mouth, push the other end to push the measuring rod into the converter until the measuring end touches the furnace bottom, and then observe the horizontal position of the measuring rod and the furnace mouth through the slag pouring chamber in front of the furnace, and then pull out the measuring rod to complete the furnace bottom depth measurement. This method has low measurement accuracy, high labor intensity, is too close to the furnace mouth, and has low safety. Summary of the invention

[0004] The present invention provides a method and device for automatically measuring the thickness of a converter bottom, so as to overcome at least one technical problem existing in the prior art.

[0005] In a first aspect, an embodiment of the present invention provides a method for automatically measuring the thickness of a converter bottom, comprising:

[0006] Collect multiple sample images of the converter at different angles;

[0007] Training the sample images to obtain a converter angle recognition model, and uploading the converter angle recognition model to a control processing module;

[0008] The camera module is used to collect real-time images of the converter when it rotates;

[0009] Inputting the real-time image into the converter angle recognition model to obtain the converter angle;

[0010] Determine whether the converter angle is equal to a predetermined angle. If not, jump to the step of collecting real-time images when the converter rotates; if so, determine whether the converter is stationary. If it is still rotating, jump to the step of collecting real-time images when the converter rotates. If it is stationary, use the control processing module to start the laser ranging module, use the laser ranging module to measure the bottom of the converter for a predetermined time, send the measured data to the control processing module, use the control processing module to process the data, and obtain the vertical distance L from the measuring device to the bottom of the converter. 1 ;

[0011] According to the formula D = H - (L 1 -L 0 ), calculate the current furnace bottom thickness; where H represents the height of the converter, L 0 Indicates the vertical distance from the measuring device to the furnace mouth.

[0012] Optionally, the sample images are trained to obtain a converter angle recognition model, specifically:

[0013] The sample images are trained using machine learning to obtain a converter angle recognition model.

[0014] Optionally, after obtaining the converter angle recognition model, the method further includes:

[0015] The converter angle recognition model is tested to determine whether the converter angle recognition model is qualified.

[0016] Optionally, when the difference between the converter angle identified by the converter angle identification model and the actual angle of the converter is less than or equal to 2°, it indicates that the converter angle identification model is qualified.

[0017] Optionally, when the converter angle is equal to a predetermined angle and the converter stops rotating, the method further comprises:

[0018] The surface temperature of the measuring device on the side close to the converter furnace mouth is detected, and when the surface temperature reaches an operating threshold, the measuring device is cooled down.

[0019] Optionally, the laser ranging module obtains m groups of measurement results within a predetermined time, each group of measurement results includes multiple data; and the control processing module is used to perform data processing, specifically:

[0020] The m groups of measurement results are transmitted to the control processing module, and the control processing module averages the multiple data in each group of measurement results to obtain m average values ​​R 1 , R2 , …, R m ;

[0021] For m average values ​​R 1 , R 2 , …, R m Analyze and obtain the vertical distance L from the measuring device to the furnace bottom 1 .

[0022] Optionally, when the converter angle is equal to a predetermined angle and the converter stops rotating, the method further comprises:

[0023] Utilize the control processing module to send a control signal to the computer, and control the computer to display "measuring";

[0024] After calculating the current furnace bottom thickness, it also includes:

[0025] The control processing module is used to send the furnace bottom thickness to a computer, so that the computer displays "measurement completed" and displays the furnace bottom thickness at the same time.

[0026] On the other hand, the present invention also provides a device for automatically measuring the thickness of a converter bottom, comprising: a camera module, a laser distance measurement module, a control processing module and a computer;

[0027] The camera module is used to collect multiple sample images of the converter at different angles;

[0028] The computer is used to train the sample image to obtain a converter angle recognition model, and upload the converter angle recognition model to the control processing module;

[0029] The camera module is also used to collect real-time images when the converter rotates;

[0030] The control processing module is used to input the real-time image into the converter angle recognition model to obtain the converter angle;

[0031] The control processing module is also used to determine whether the converter angle is equal to a predetermined angle. If not, jump to the step of collecting real-time images when the converter rotates; if so, determine whether the converter is stationary. If it is still rotating, jump to the step of collecting real-time images when the converter rotates. If it is stationary, use the control processing module to start the laser distance measurement module, use the laser distance measurement module to measure the bottom of the converter for a predetermined time, send the measured data to the control processing module, use the control processing module to process the data, and obtain the vertical distance L from the measuring device to the bottom of the converter. 1 ;

[0032] The control processing module is also used to calculate the value of the formula D=H-(L 1 -L0 ), calculate the current furnace bottom thickness; where H represents the height of the converter, L 0 Indicates the vertical distance from the laser ranging module to the furnace opening.

[0033] Optionally, it also includes:

[0034] The testing module is used to test the converter angle recognition model to determine whether the converter angle recognition model is qualified.

[0035] Optionally, a cooling module is further included, and when the surface temperature of the measuring device on the side close to the converter furnace mouth reaches an operating threshold, the cooling module is used to cool down the measuring device.

[0036] The innovative features of the embodiments of the present invention include:

[0037] 1. In this embodiment, sample images of the steel plant are collected and trained to obtain a converter angle recognition model. The converter angle can be automatically identified using the converter angle recognition model. After the converter is rotated to a predetermined angle, the measurement is automatically started to quickly complete the measurement of the center thickness of the furnace bottom. Therefore, the measurement of the furnace bottom thickness can be completed in the interval between two steelmaking cycles, which is one of the innovative points of the embodiment of the present invention.

[0038] 2. In this embodiment, the measurement accuracy is within the centimeter level, which greatly improves the measurement accuracy compared to the existing measurement method, and does not require manual measurement. It not only avoids the unsafe problem of being too close to the furnace mouth, but also can effectively reduce labor costs, which is one of the innovations of the embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 A flow chart of a method for automatically measuring the thickness of a converter bottom provided by an embodiment of the present invention;

[0041] Figure 2 A schematic diagram of an installation position of a thickness measuring device and a converter provided in an embodiment of the present invention;

[0042] Figure 3 Another flow chart of the method for automatically measuring the thickness of a converter bottom provided by an embodiment of the present invention;

[0043] Figure 4Another flow chart of the method for automatically measuring the thickness of a converter bottom provided by an embodiment of the present invention;

[0044] Figure 5 A schematic diagram of the structure of a measuring device provided in an embodiment of the present invention;

[0045] Figure 6 Another schematic diagram of the structure of the thickness measuring device provided by the embodiment of the present invention;

[0046] Figure 7 A schematic diagram of another structure of a thickness measuring device provided in an embodiment of the present invention;

[0047] Figure 8 A model diagram of a measuring device;

[0048] Fig. 9 It is the average value of 5 groups obtained by actual measurement. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present invention and the accompanying drawings are intended to cover non-exclusive inclusions. For example, a process, method, device, product or equipment including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or equipment.

[0051] The embodiment of the present invention discloses a method and device for automatically measuring the thickness of a converter bottom, which are described in detail below.

[0052] Figure 1 A flow chart of a method for automatically measuring the thickness of a converter bottom provided by an embodiment of the present invention,

[0053] Figure 2 For a schematic diagram of an installation position of a thickness measuring device and a converter provided in an embodiment of the present invention, please refer to Figure 1 and Figure 2 The method for automatically measuring the thickness of a converter bottom provided by an embodiment of the present invention comprises:

[0054] Step 01: Collect multiple sample images of converter 1 at different angles;

[0055] Step 02: training the sample image to obtain a converter angle recognition model, and uploading the converter angle recognition model to the control processing module 5;

[0056] Step 03: Using the camera module 4 to collect real-time images of the converter 1 when it rotates;

[0057] Step 04: Input the real-time image into the converter angle recognition model to obtain the converter angle;

[0058] Step 05: Determine whether the converter angle is equal to the predetermined angle. If not, jump to the step of collecting the real-time image of the converter 1 when it rotates; if so, determine whether the converter 1 is stationary. If it is still rotating, jump to the step of collecting the real-time image of the converter 1 when it rotates. If it is stationary, use the control processing module 5 to turn on the laser distance measurement module 2, use the laser distance measurement module 2 to measure the furnace bottom of the converter 1 for a predetermined time, send the measured data to the control processing module 5, use the control processing module 5 to process the data, and obtain the vertical distance L from the measuring device 8 to the furnace bottom. 1 ;

[0059] Step 06: According to the formula D = H - (L 1 -L 0 ), calculate the current furnace bottom thickness; where H represents the height of the converter, L 0 Indicates the vertical distance from the measuring device 8 to the furnace opening.

[0060] Specifically, please refer to Figure 1 and Figure 2 The method for automatically measuring the thickness of the converter bottom provided by the present invention first fixes the thickness measuring device 8 opposite to the converter 1. When fixing the thickness measuring device 8, it can be fixed on the wall 7 opposite to the converter 1 through a bracket.

[0061] The present invention measures the converter angle through a converter angle recognition model, therefore, it is necessary to first establish a converter angle recognition model. In this embodiment, after the thickness measuring device 8 is installed, the camera module 4 starts working, and in step 01, multiple sample images of the converter 1 at various angles in different environments such as light and dark, and reflection are collected, and then in step 02, the sample images are transferred to the computer 6 for annotation, and the converter angle recognition model is trained by analyzing the color, grayscale distribution and other information of the sample images at different angles, and the converter angle recognition model is uploaded to the control processing module 5 in the thickness measuring device 8, so as to use the control processing module 5 to recognize the real-time images collected subsequently.

[0062] After obtaining the converter angle recognition model, in step 03, the camera module 4 is used to collect real-time photos of the converter 1 when it rotates to obtain a real-time image of the converter rotation. Through step 04, the real-time image of the converter 1 rotation is input into the converter angle recognition model to identify the current angle of the converter 1.

[0063] After obtaining the converter angle, step 05 is used to determine whether the converter 1 has rotated to the specified angle. When the converter angle is not equal to the predetermined angle, it means that the converter 1 has not rotated to the specified angle, and it is necessary to continue to collect real-time images of the converter 1 when it rotates. Therefore, the process jumps to step 03. The predetermined angle here can be, for example, the angle corresponding to when the converter mouth faces the thickness measuring device 8. The angle when the converter mouth faces the thickness measuring device 8 is defined as 90°. Since there is a certain error in the converter angle recognition, when the converter angle is identified to be 89°-91°, it is considered that the predetermined angle is reached.

[0064] The thickness of the furnace bottom needs to be measured after the converter 1 has finished smelting a batch of steel and poured out the molten steel and slag. Therefore, when the converter angle is equal to the predetermined angle, it is also necessary to determine whether the converter 1 has stopped rotating. If the converter 1 is still rotating, it means that the converter 1 is still in working condition. Therefore, jump to step 03 to continue to collect real-time images of the converter 1 when it rotates; if the converter 1 stops, the control processing module 5 sends a control signal to the laser ranging module 2 so that the laser ranging module 2 starts working and measures the furnace bottom of the converter 1 for a predetermined time. The predetermined time here can be 5s, for example. By continuously measuring for 5s, the measurement data can be made more reliable and the measurement accuracy can be improved. After the measurement is completed, the measurement data is sent to the control processing module 5, and the control processing module 5 processes the data to obtain the vertical distance L from the measuring device 8 to the furnace bottom. 1 .

[0065] After obtaining the vertical distance from the measuring device 8 to the furnace bottom, in step 06, according to the formula D = H - (L 1 -L 0 ), the current furnace bottom thickness can be calculated. Among them, H represents the height of the converter, L 0 It indicates the vertical distance from the measuring device 8 to the furnace opening. It should be noted that the vertical distance from the measuring device 8 to the furnace opening can be measured by moving the thickness measuring device 8 horizontally to the opposite side of the furnace opening before installing and fixing the thickness measuring device 8.

[0066] The method for automatically measuring the thickness of the converter bottom provided by the present invention collects sample images of the steel plant, trains a converter angle recognition model, and uses the converter angle recognition model to automatically identify the converter angle, automatically starts measuring after the converter rotates to a predetermined angle, and quickly completes the measurement of the center thickness of the bottom. Therefore, the measurement of the thickness of the bottom can be completed in the interval between two steelmakings. In addition, the measurement accuracy is within the centimeter level, which greatly improves the measurement accuracy compared to the existing measurement method, and no manual measurement is required, which not only avoids the problem of being too close to the furnace mouth and is unsafe, but also can effectively reduce labor costs.

[0067] Optionally, refer to Figure 2 , the sample images are trained to obtain the converter angle recognition model, specifically: the sample images are trained using machine learning to obtain the converter angle recognition model. For details, please refer to Figure 2 In this embodiment, after the sample image is transmitted to the computer 6 for annotation, machine learning is used to analyze the color, grayscale distribution and other information of the sample images at different angles, and the converter angle recognition model is trained.

[0068] Optionally, Figure 3 For another flow chart of the method for automatically measuring the thickness of the converter bottom provided by the embodiment of the present invention, please refer to Figure 2 and Figure 3 After obtaining the converter angle recognition model, the method further includes: step 021, testing the converter angle recognition model to determine whether the converter angle recognition model is qualified. Further, when the difference between the converter angle recognized by the converter angle recognition model and the actual angle of converter 1 is less than or equal to 2°, it indicates that the converter angle recognition model is qualified.

[0069] Specifically, please refer to Figure 2 and Figure 3 In order to further improve the measurement accuracy, after obtaining the converter angle recognition model, this embodiment tests the converter angle recognition model through step 021. During the test, the converter angle recognition model is actually applied to the steel plant, and the difference between the angle data obtained by the converter angle recognition model and the actual converter angle of the steel plant is compared. When the difference between the two is less than or equal to 2°, it indicates that the converter angle recognition model is qualified. Otherwise, it indicates that the converter angle recognition model is unqualified.

[0070] Optionally, Figure 4 For another flow chart of the method for automatically measuring the thickness of the converter bottom provided by the embodiment of the present invention, please refer to Figure 2 and Figure 4 When the converter angle is equal to a predetermined angle and the converter 1 stops rotating, it also includes: detecting the surface temperature of the measuring device 8 close to the converter mouth, and when the surface temperature reaches a working threshold, cooling the measuring device 8.

[0071] Specifically, please refer to Figure 2 and Figure 4 , the present invention defines the angle corresponding to when the converter mouth faces the measuring device 8 as a predetermined angle. When the converter mouth faces the measuring device 8, the ambient temperature near the measuring device 8 reaches above 40°C, and the surface temperature of the measuring device 8 reaches 45°C, which is close to the threshold of its normal operation. Long-term operation will trigger high-temperature protection and stop emitting lasers. In order to ensure the normal operation of the system, when the temperature of the measuring device 8 reaches the threshold, the measuring device 8 needs to be cooled down. Therefore, when the converter angle is equal to the predetermined angle, this embodiment detects the surface temperature of the measuring device 8, detects the surface temperature of the measuring device 8 close to the converter mouth, and when the surface temperature reaches the working threshold, the measuring device 8 is cooled down.

[0072] Optionally, the laser ranging module 2 measures and obtains m groups of measurement results within a predetermined time, each group of measurement results includes multiple data; the control processing module 5 is used to process the data, specifically: the m groups of measurement results are transmitted to the control processing module 5, and the control processing module 5 averages the multiple data in each group of measurement results to obtain m average values ​​R 1 , R 2 , …, R m ; For m average values ​​R 1 , R 2 , …, R m Analyze and obtain the vertical distance L from the measuring device 8 to the furnace bottom 1 .

[0073] Specifically, the laser ranging module 2 continuously measures for a predetermined time to obtain m groups of measurement results. For example, if the predetermined time is 5s, 5 groups of measurement results are obtained, and each group of measurement results contains multiple data. Here, the amount of data contained in each group of measurement results is related to the operating frequency of the laser ranging module 2. For example, when the operating frequency of the laser ranging module 2 is set to 35Hz, 35 data will be measured per second. After the m groups of measurement results are transmitted to the control processing module 5, the control processing module 5 averages the multiple data in each group of measurement results, such as averaging the 35 data in the 5 groups of measurement results to obtain 5 average values ​​R 1 , R 2 , …, R 5 By taking m average values ​​R 1 , R 2 , …, R m By analyzing, we can get the vertical distance L from the measuring device 8 to the furnace bottom. 1 .

[0074] Optionally, refer to Figure 2When the converter angle is equal to the predetermined angle and the converter 1 stops rotating, it also includes: using the control processing module 5 to send a control signal to the computer 6, and controlling the computer 6 to display "measuring"; after calculating the current furnace bottom thickness, it also includes: using the control processing module 5 to send the furnace bottom thickness to the computer 6, so that the computer 6 displays "measurement ended" and displays the furnace bottom thickness at the same time.

[0075] Specifically, please refer to Figure 2 In this embodiment, when the converter angle is equal to the predetermined angle and the converter 1 stops rotating, the control processing module 5 sends a control signal to the computer 6, and the computer 6 is controlled to display "measuring". After calculating the current furnace bottom thickness, the control processing module 5 sends the furnace bottom thickness to the computer 6, so that the computer 6 displays "measurement completed" and displays the furnace bottom thickness at the same time. In this way, the working state and measurement results of the measuring device 8 can be displayed intuitively, and the preservation and recording of data, logs, etc. can be completed. The computer 6 is used to record and save the results of each measurement, and to make tables and curves, which can be used for the staff to judge the changes in the thickness of the converter lining. In this way, the staff does not need to go to the dangerous on-site environment to measure to know the condition of the converter lining, which greatly saves the measurement time and is of great help to improve the efficiency and safety of steelmaking.

[0076] Based on the same inventive concept, the present invention also provides a device 8 for automatically measuring the thickness of the converter bottom. Figure 5 A schematic diagram of the structure of the measuring device 8 provided in the embodiment of the present invention is shown in FIG. Figure 5 The device 8 for automatically measuring the thickness of the converter bottom provided by the embodiment of the present invention comprises: a camera module 4, a laser ranging module 2, a control processing module 5 and a computer 6;

[0077] The camera module 4 is used to collect multiple sample images of the converter at different angles;

[0078] The computer 6 is used to train the sample images to obtain a converter angle recognition model, and upload the converter angle recognition model to the control processing module 5;

[0079] The camera module 4 is also used to collect real-time images when the converter rotates;

[0080] The control processing module 5 is used to input the real-time image into the converter angle recognition model to obtain the converter angle;

[0081] The control processing module 5 is also used to determine whether the converter angle is equal to a predetermined angle. If not, jump to the step of collecting real-time images when the converter rotates; if so, determine whether the converter is stationary. If it is still rotating, jump to the step of collecting real-time images when the converter rotates. If it is stationary, use the control processing module 5 to start the laser distance measurement module 2, use the laser distance measurement module 2 to measure the bottom of the converter for a predetermined time, send the measured data to the control processing module 5, use the control processing module 5 to process the data, and obtain the vertical distance L from the measuring device 8 to the bottom of the furnace. 1 ;

[0082] The control processing module 5 is also used to calculate the value of the formula D=H-(L 1 -L 0 ), calculate the current furnace bottom thickness; where H represents the height of the converter, L 0 Indicates the vertical distance from the laser ranging module 2 to the furnace opening.

[0083] Specifically, please refer to Figure 2 and Figure 5 The device 8 for automatically measuring the thickness of the converter bottom provided by the present invention first fixes the thickness measuring device 8 opposite to the converter 1. When fixing the thickness measuring device 8, it can be fixed on the wall 7 through a bracket.

[0084] The present invention measures the converter angle by a converter angle recognition model, therefore, it is necessary to first establish a converter angle recognition model. In this embodiment, after the thickness measuring device 8 is installed, the camera module 4 is turned on, and the camera module 4 is used to collect multiple sample images of the converter 1 at various angles in different environments such as light and dark, and reflection, and then the sample images are transferred to the computer 6 for annotation, and the computer 6 analyzes the color, grayscale distribution and other information of the sample images at different angles, trains to obtain the converter angle recognition model, and uploads the converter angle recognition model to the control processing module 5 in the thickness measuring device 8, so as to facilitate the use of the control processing module 5 to recognize the real-time images collected subsequently.

[0085] After obtaining the converter angle recognition model, the camera module 4 is used to collect real-time photos of the converter 1 when it rotates, to obtain a real-time image of the converter 1 rotating, and the control processing module 5 is used to input the real-time image of the converter 1 rotating into the converter angle recognition model, so that the current angle of the converter can be identified.

[0086] After obtaining the converter angle, the control processing module 5 is used to determine whether the converter 1 has rotated to the specified angle. When the converter angle is not equal to the predetermined angle, it means that the converter 1 has not rotated to the specified angle, and it is necessary to continue to collect real-time images of the converter 1 when it rotates. The predetermined angle here can be, for example, the angle corresponding to when the converter mouth faces the thickness measuring device 8. The angle when the converter mouth faces the thickness measuring device 8 is defined as 90°. Since there is a certain error in the converter angle recognition, when the converter angle is identified to be 89°-91°, it is considered that the predetermined angle is reached.

[0087] The thickness of the furnace bottom needs to be measured after the converter 1 has finished smelting a batch of steel and poured out the molten steel and slag. Therefore, when the converter angle is equal to the predetermined angle, it is also necessary to determine whether the converter 1 has stopped rotating. If the converter 1 is still rotating, it means that the converter 1 is still in working condition. Therefore, the real-time image of the converter 1 when rotating should continue to be collected. If the converter 1 is stationary, the control processing module 5 sends a control signal to the laser ranging module 2 so that the laser ranging module 2 starts working and measures the furnace bottom of the converter 1 for a predetermined time. The predetermined time here can be, for example, 5s. By continuously measuring for 5s, the measurement data can be made more reliable and the measurement accuracy can be improved. After the measurement is completed, the measurement data is sent to the control processing module 5, and the control processing module 5 processes the data to obtain the vertical distance L from the measuring device 8 to the furnace bottom. 1 .

[0088] After obtaining the vertical distance from the measuring device 8 to the furnace bottom, the control processing module 5 calculates the vertical distance from the measuring device 8 to the furnace bottom according to the formula D = H - (L 1 -L 0 ), the current furnace bottom thickness can be calculated. Among them, H represents the height of the converter, L 0 It indicates the vertical distance from the measuring device 8 to the furnace opening. It should be noted that the vertical distance from the measuring device 8 to the furnace opening can be measured by moving the thickness measuring device 8 horizontally to the opposite side of the furnace opening before installing and fixing the thickness measuring device 8.

[0089] The device 8 for automatically measuring the thickness of the converter bottom provided by the present invention collects sample images of the steel plant and trains a converter angle recognition model. The converter angle recognition model can be used to automatically identify the converter angle, automatically start measuring after the converter rotates to a predetermined angle, and quickly complete the measurement of the center thickness of the bottom. Therefore, the measurement of the thickness of the bottom can be completed in the interval between two steelmakings. In addition, the measurement accuracy is within the centimeter level, which greatly improves the measurement accuracy compared to the existing measurement method, and no manual measurement is required, which not only avoids the problem of being too close to the furnace mouth and is unsafe, but also can effectively reduce labor costs.

[0090] Optionally, Figure 6 For another schematic diagram of the thickness measuring device 8 provided in an embodiment of the present invention, please refer to Figure 6The device 8 for automatically measuring the thickness of the converter bottom also includes: a testing module 9, which is used to test the converter angle recognition model to determine whether the converter angle recognition model is qualified.

[0091] Specifically, please refer to Figure 6 In order to further improve the measurement accuracy, after obtaining the converter angle recognition model, this embodiment uses the test module 9 to test the converter angle recognition model. During the test, the converter angle recognition model is actually applied to the steel plant, and the difference between the angle data obtained by the converter angle recognition model and the actual converter angle of the steel plant is compared. When the difference between the two is less than or equal to 2°, it indicates that the converter angle recognition model is qualified. Otherwise, it indicates that the converter angle recognition model is unqualified.

[0092] Optionally, Figure 7 For another structural schematic diagram of the thickness measuring device 8 provided in an embodiment of the present invention, please refer to Figure 7 The device 8 for automatically measuring the thickness of the converter bottom also includes a cooling module 3. When the surface temperature of the measuring device 8 close to the converter furnace mouth reaches the working threshold, the cooling module 3 is used to cool the measuring device 8.

[0093] Specifically, please refer to Figure 7 , the present invention defines the angle corresponding to when the converter mouth faces the measuring device 8 as a predetermined angle. When the converter mouth faces the measuring device 8, the ambient temperature near the measuring device 8 reaches above 40°C, and the surface temperature of the measuring device 8 reaches 45°C, which is close to the threshold of its normal operation. Long-term operation will trigger high-temperature protection and stop emitting lasers. In order to ensure the normal operation of the system, when the temperature of the measuring device 8 reaches the threshold, the measuring device 8 needs to be cooled down. Therefore, when the converter angle is equal to the predetermined angle, this embodiment detects the surface temperature of the measuring device 8, and detects the surface temperature of the measuring device 8 close to the converter mouth. When the surface temperature reaches the working threshold, the cooling module 3 is used to cool down the measuring device 8 to ensure that the laser ranging module 2 can continue to work in a high temperature environment.

[0094] Please refer to Figure 8 , Figure 8 It is a model diagram of the measuring device, which schematically shows the laser ranging module 2, cooling module 3, camera module 4, control processing module 5 and power supply 9. It is connected to the computer through a network cable. The software in the computer can directly display the working status of the equipment and the measurement results, and complete the preservation and recording of data and logs.

[0095] The laser distance measuring module 2 is composed of a high-temperature distance measuring instrument specially used for the converter, and can work normally in a high-temperature and high-brightness environment after the converter has poured molten steel. Figure 8The shaded part is the exhaust fan, which is part of the cooling module 3 and is responsible for cooling the laser ranging module 2 to ensure that the laser ranging module 2 can continue to work in a high temperature environment. The camera module 4 can monitor the converter in real time and transmit the image of the converter to the control processing module 5. The converter angle recognition model is deployed on the control processing module 5, which can receive the image of the camera module 4 in real time, put it into the model for calculation, and give the converter angle. At the same time, the measurement results can be processed on the data processing module 5. The power supply 9 is responsible for supplying power to each module.

[0096] In addition, two pieces of glass are installed on the measuring device window. One piece is a high-transmittance glass with a wavelength corresponding to the laser of the laser ranging module 2, which plays a role in shielding external dust and ensuring that the laser passes smoothly. The other piece is the glass of the camera window, which ensures that the camera can clearly take pictures of the converter. Workers can ensure that the equipment is not affected by wiping the window regularly.

[0097] The above-mentioned measuring device was installed in a steel plant for field measurement. The center position of the converter bottom was measured continuously for 5 seconds. When the working frequency of the laser ranging module was set to 35Hz during the test, 35 data were measured per second. The control and processing module divided the data measured within 5s into 5 groups, and the average value R was calculated for every 35 data. The following is obtained: Fig. 9 Finally, the five average values ​​are calculated and analyzed to obtain the distance L from the measuring device to the furnace bottom. 1 For L 1 =(R 1 +R 2 +R 3 +R 4 +R 5 ) / 5=32.12m. According to the design drawings of the converter, the overall height H of the converter is 10.4m. Combined with the pre-measured L 0 = 22.82m, we can calculate the current thickness of the converter bottom D = H-(L 1 -L 0 )=1.1m. The control processing module transmits the thickness information to the computer. The computer will display "Measurement End" and the thickness information.

[0098] Those skilled in the art can understand that the accompanying drawings are only schematic diagrams of an embodiment, and the modules or processes in the accompanying drawings are not necessarily required to implement the present invention.

[0099] Those skilled in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description of the embodiment, or can be changed accordingly and located in one or more devices different from the embodiment. The modules in the above embodiment can be combined into one module, or can be further divided into multiple sub-modules.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for automatically measuring the thickness of a converter bottom, characterized in that: include: Collect multiple sample images of the converter at different angles; Training the sample images to obtain a converter angle recognition model, and uploading the converter angle recognition model to a control processing module; The camera module is used to collect real-time images of the converter when it rotates; Inputting the real-time image into the converter angle recognition model to obtain the converter angle; Determine whether the converter angle is equal to a predetermined angle, and if not, jump to the step of collecting a real-time image of the converter when it rotates; If yes, determine whether the converter is stopped. If it is still rotating, jump to the step of collecting real-time images of the converter when it rotates. If it is stopped, use the control processing module to start the laser distance measurement module, use the laser distance measurement module to measure the furnace bottom of the converter for a predetermined time, send the measured data to the control processing module, use the control processing module to process the data, and obtain the vertical distance L1 from the measuring device to the furnace bottom; The current furnace bottom thickness is calculated according to the formula D=H-(L1-L0); wherein H represents the height of the converter, and L0 represents the vertical distance from the measuring device to the furnace mouth.

2. The method for automatically measuring the thickness of a converter bottom according to claim 1, characterized in that: The sample images are trained to obtain a converter angle recognition model, specifically: The sample images are trained using machine learning to obtain a converter angle recognition model.

3. The method for automatically measuring the thickness of a converter bottom according to claim 1, characterized in that: After obtaining the converter angle recognition model, it also includes: The converter angle recognition model is tested to determine whether the converter angle recognition model is qualified.

4. The method for automatically measuring the thickness of a converter bottom according to claim 3, characterized in that: When the difference between the converter angle identified by the converter angle identification model and the actual angle of the converter is less than or equal to 2°, it indicates that the converter angle identification model is qualified.

5. The method for automatically measuring the thickness of a converter bottom according to claim 1, characterized in that: When the converter angle is equal to a predetermined angle and the converter stops rotating, the method further comprises: The surface temperature of the measuring device on the side close to the converter furnace mouth is detected, and when the surface temperature reaches an operating threshold, the measuring device is cooled down.

6. The method for automatically measuring the thickness of a converter bottom according to claim 1, characterized in that: The laser ranging module obtains m groups of measurement results within a predetermined time, each group of measurement results includes multiple data; the control processing module is used to process the data, specifically: The m groups of measurement results are transmitted to the control processing module, and the control processing module averages the multiple data in each group of measurement results to obtain m average values ​​R1, R2, ..., R m ; For m average values ​​R1, R2, ..., R m An analysis is performed to obtain the vertical distance L1 from the measuring device to the furnace bottom.

7. The method for automatically measuring the thickness of a converter bottom according to claim 1, characterized in that: When the converter angle is equal to a predetermined angle and the converter stops rotating, the method further comprises: Utilize the control processing module to send a control signal to the computer, and control the computer to display "measuring"; After calculating the current furnace bottom thickness, it also includes: The control processing module is used to send the furnace bottom thickness to a computer, so that the computer displays "measurement completed" and displays the furnace bottom thickness at the same time.

8. A device for automatically measuring the thickness of a converter bottom, characterized in that: include: Camera module, laser ranging module, control processing module and computer; The camera module is used to collect multiple sample images of the converter at different angles; The computer is used to train the sample image to obtain a converter angle recognition model, and upload the converter angle recognition model to the control processing module; The camera module is also used to collect real-time images when the converter rotates; The control processing module is used to input the real-time image into the converter angle recognition model to obtain the converter angle; The control processing module is also used to determine whether the converter angle is equal to a predetermined angle, and if not, jump to the step of collecting a real-time image of the converter when it rotates; if so, determine whether the converter is stationary, and if it is still rotating, jump to the step of collecting a real-time image of the converter when it rotates, and if it is stationary, use the control processing module to start the laser distance measurement module, use the laser distance measurement module to measure the furnace bottom of the converter for a predetermined time, send the measured data to the control processing module, and use the control processing module to process the data to obtain the vertical distance L1 from the measuring device to the furnace bottom; The control processing module is also used to calculate the current furnace bottom thickness according to the formula D=H-(L1-L0); wherein H represents the height of the converter, and L0 represents the vertical distance from the laser ranging module to the furnace mouth.

9. The device for automatically measuring the thickness of a converter bottom according to claim 8, characterized in that: Also includes: The testing module is used to test the converter angle recognition model to determine whether the converter angle recognition model is qualified.

10. The device for automatically measuring the thickness of a converter bottom according to claim 8, characterized in that: It also includes a cooling module, which is used to cool down the measuring device when the surface temperature of the measuring device close to the converter furnace mouth reaches an operating threshold.

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