Detection system and method for evaluating temperature drop of molten iron transported by torpedo tank car

Abstract

The invention discloses a detection system for temperature drop evaluation of molten iron transported by a torpedo tank car. The detection system comprises an image acquisition system, a temperature acquisition system, a data processing system, a communication system, a temperature abnormity alarm system and a control cabinet, the image acquisition system is used for observing the dynamic process of the torpedo tank car in real time; the temperature acquisition system is used for acquiring molten iron temperatures of different detection points on the outer surface of the torpedo tank car; the data processing system is used for acquiring temperature data of each detection point location in real time; the communication system enables the remote control center to dispatch each torpedo tank car; and the remote control center acquires the average temperature of the molten iron through the CFD simulation acquisition module. Meanwhile, the invention discloses a detection method. According to the method, the temperature field distribution condition of the molten iron in the torpedo tank car at any instant in the whole process under the corresponding transportation working condition and the change of the overall average temperature of the molten iron along with time are simulated, so that the real-time average temperature of the molten iron is accurately obtained, and the quality of subsequent production is ensured.

Description

Technical Field

[0001] The present invention belongs to the field of iron and steel metallurgy, and particularly relates to a detection system and a detection method for a temperature field for evaluating the temperature drop of molten iron transported by a torpedo ladle car in a steel plant. Background Art

[0002] With the implementation of the "Double Reduction" policy, the iron and steel industry pays more attention to energy conservation and emission reduction. After molten iron is produced from the blast furnace, it needs to go through processes such as receiving molten iron, transportation, and waiting in a torpedo ladle car before reaching the pouring station in the steelmaking plant. During these processes, molten iron will transfer heat with various media (such as air, the lining of the torpedo ladle car, slag layer, etc.), resulting in a temperature drop of the molten iron. Therefore, before the molten iron is poured out of the torpedo ladle car, it is necessary to detect the temperature of the molten iron, so that the operator can adjust the production process in the steel area to ensure production stability, thus guaranteeing product quality. At the same time, the relationship between temperature and time is also analyzed to change the logistics scheduling of molten iron to reduce energy consumption.

[0003] Currently, the detection of molten iron temperature drop mainly relies on measuring the temperature of molten iron at a fixed point, that is, detecting the tapping temperature and the pouring temperature at a random point, and the thermocouple can only be used for detection once. Its disadvantages are: First, since only a random point can be detected, fixed-point temperature measurement can only reflect the temperature of molten iron at a certain position at a certain moment, and cannot detect the temperature changes at other tapping points and the whole process of molten iron, and cannot provide an accurate basis for the subsequent process adjustment, thus affecting product quality; Second, due to different temperature drop laws in different transportation conditions and various heat transfer methods during the transportation of molten iron, fixed-point temperature measurement cannot accurately capture the influence of these heat transfers on the temperature of molten iron, and thus cannot comprehensively reflect the temperature change law of molten iron during transportation. Summary of the Invention

[0004] The problem to be solved by the present invention is to provide a detection system for evaluating the temperature drop of molten iron transported by a torpedo ladle car. It simulates the temperature field distribution of molten iron in the torpedo ladle car at any instantaneous moment in the whole process corresponding to the transportation condition through simulation, as well as the change of the overall average temperature of molten iron over time, so as to accurately obtain the real-time average temperature of molten iron, ensuring the quality of subsequent production. At the same time, it can reliably study the change process of the temperature drop of molten iron during the complex transportation process to reduce energy consumption. At the same time, the present invention also provides a detection method.

[0005] A detection system for evaluating the temperature drop during the transportation of hot metal by a torpedo ladle car according to the present invention includes an image acquisition system, a temperature acquisition system, a data processing system, a communication system, a temperature anomaly alarm system, and a control cabinet; the image acquisition system is installed on the mounting bushing at one end of the torpedo ladle car for observing the dynamic process of the torpedo ladle car in real time, obtaining the basic state information of the tank body during the transportation of the torpedo ladle car, and transmitting it to the remote control center through the communication system; the temperature acquisition system is used to collect the hot metal temperatures at different detection points on the outer surface of the torpedo ladle car and transmit them to the data processing system through the communication system; the data processing system is used to receive the data information transmitted by the temperature acquisition system and obtain the temperature data of each detection point in real time; the communication system is used to wirelessly transmit the processed temperature data to the remote control center, enabling the remote control center to realize the scheduling of each torpedo ladle car; the temperature anomaly alarm system is used to receive the abnormal temperature information of the points detected by the temperature acquisition system and give an alarm warning for the temperature information of the abnormal points; the data processing system, the communication system, and the temperature anomaly alarm system are all arranged in the control cabinet, and the control cabinet is fixed on the transportation platform at one end of the torpedo ladle car; the remote control center obtains the average temperature of the hot metal through the CFD simulation module.

[0006] Further, the image acquisition system includes a camera, a mounting base, a lifting frame, a support, and a rotating table. The camera, the lifting frame, the support, the rotating table, and the mounting base are arranged from top to bottom and are connected pairwise; the mounting base is fixed on the mounting bushing at one end of the torpedo ladle car.

[0007] Further, the temperature acquisition system includes a plurality of temperature detection devices, which are respectively fixed at a plurality of temperature detection points on the outer surface of the torpedo ladle car; the temperature detection points include the temperature detection points on the left end frustum of the torpedo ladle car, the temperature detection points on the middle cylinder, and the temperature detection points on the right end frustum.

[0008] Further, the temperature detection points on the left end frustum include the upper left point, the middle left point, and the lower left point, the temperature detection points on the right end frustum include the upper right point, the middle right point, and the lower right point, and the temperature detection points on the middle cylinder include the shoulder point, the middle point, and the bottom point.

[0009] A detection method for evaluating the temperature drop during the transportation of hot metal by a torpedo ladle car according to the present invention specifically comprises the following steps: ①. Adjust the initial state of the temperature detection device, fix it at the corresponding detection points on the outer surface of the torpedo ladle car, and use the image acquisition system to assist in adjusting the temperature detection device to a suitable position; ②. Adjust the receiving mode of the data processing system so that the data information at each point can be normally transmitted into the data processing system to ensure the complete and accurate recording of the temperature change; ③. Starting from the hot metal receiving stage of the torpedo ladle car, the temperature acquisition system starts to work, acquires the hot metal temperature at each detection point, and records the time corresponding to this temperature at the same time; when the hot metal receiving stage ends, acquire the hot metal temperature at each detection point and record the time corresponding to this temperature at the same time; during the transportation of the torpedo ladle car, acquire the hot metal temperature at each detection point and record the time corresponding to this temperature; finally, generate a two-dimensional image of the temperature change over time for the whole process: the vertical coordinate is the hot metal temperature and the horizontal coordinate is the corresponding time; ④. The remote control center uses the computer CFD simulation module to simulate the temperature field distribution of the hot metal in the torpedo ladle car at any instant during the whole process under the corresponding transportation conditions and the change of the overall average temperature of the hot metal over time, so as to obtain the real-time average temperature of the hot metal.

[0010] Further, in step ③: Before the torpedo ladle car transports molten steel, adjust the position of the camera through the rotary table and the lifting frame, and adjust the focal length of the camera so that the image of the torpedo ladle car collected by the image acquisition system is clearly visible.

[0011] Further, step ④ is specifically as follows: First, establish a three-dimensional model of the corresponding torpedo ladle car in the drawing software, then perform the pre-processing of the simulation, and then set the material parameters of the torpedo ladle car and input the speed of the torpedo ladle car, and perform the simulation according to the transportation conditions of the torpedo ladle car: Simulate the temperature field distribution of the hot metal at any instant and the change of the overall average temperature of the hot metal over time through the CFD simulation module, so as to obtain the average temperature of the hot metal at any moment, that is, the real-time average temperature; among them, the temperature data of the data processing system verifies the rationality and reliability of the CFD simulation module to ensure the correctness of the simulation data.

[0012] Further, in step ④: The pre-processing of the simulation is as follows: The three-dimensional model of the torpedo ladle car will be converted into an x-t file and imported into the Geometry module of fluent for detailed processing, all the structural models will be saved as a part, and the co-node mesh is selected for division.

[0013] Further, in step ④: The determination of the moving speed V of the torpedo ladle car during the transportation of hot metal includes the following steps: Ⅰ. The remote control center converts the video file of the torpedo ladle car during the transportation stage obtained by the image acquisition system into a corresponding picture set file through image processing technology, sets the time interval between each picture to 1 second, and obtains the photo set of the torpedo ladle car during the hot metal transportation period; select two adjacent pictures before and after; Ⅱ. According to the pixel positions of the passing objects in the two pictures before and after, calculate the moving speed V of the torpedo ladle car in the forward direction at a certain moment. The speed V can be obtained by dividing the displacement X by the interval time of 1 second: Wherein, X1 and X2 are respectively the changes in the pixel coordinate positions of the reference object in the X direction in two adjacent photos before and after a certain time node of the image acquisition system, Y1 and Y2 are respectively the changes in the pixel coordinate positions in the Y direction, r is the ratio of the actual length to the unit pixel length, and f is the sampling frame rate set by the image acquisition system when shooting the video of the torpedo ladle car transportation process.

[0014] Further, in step ④: The acquisition of the average hot metal temperature is actually to discretize the hot metal unit into a finite number of sub-units, sum up the hot metal temperatures at each unit node and then take the average as the simulated average hot metal temperature.

[0015] The advantages of the detection system and detection method of the present invention are as follows: First, 1. The image acquisition system acquires the images of the entire transportation process of the torpedo ladle car, thereby determining the moving speed V during the hot metal transportation, providing a basis for setting the boundary conditions during the subsequent CFD simulation module simulation; 2. The temperature acquisition system acquires the data changes of the temperature monitoring points during the entire transportation process of the torpedo ladle car, that is, collects the data of the hot metal temperature drop during the entire transportation process of the torpedo ladle car, and verifies the rationality and reliability of the CFD simulation module simulation; 3. The CFD simulation module simulates the temperature field distribution of the hot metal at any instant and the change of the overall average hot metal temperature over time, obtains the average temperature of the hot metal at any moment, that is, the real-time average temperature, so that the operator can adjust the steel production process to ensure production stability and thus guarantee product quality; Second, continuously collect and record the hot metal temperature during the entire transportation process of the torpedo ladle car, provide a basis for the study of the hot metal temperature drop law, thereby reasonably arranging the adjustment waiting and transportation time of the torpedo ladle car, and reducing energy consumption by changing the hot metal logistics scheduling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the framework schematic diagram of the detection system of the present invention;

[0017] Figure 2 is the schematic diagram of the detection system of the present invention;

[0018] Figure 3 is the point distribution diagram of the temperature acquisition system of the present invention.

[0019] Figure 4 Schematic diagram of the image acquisition system of the present invention. Specific embodiments

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Embodiment 1

[0022] From Figure 1 、 Figure 2 It can be seen that a detection system for evaluating the temperature drop during the transportation of hot metal by a torpedo ladle car according to the present invention includes an image acquisition system 4, a temperature acquisition system, a data processing system 5, a communication system 6, a temperature anomaly alarm system 7, and a control cabinet 8; the image acquisition system 4 is installed on the mounting bushing 10 at one end of the torpedo ladle car 9, and is used to observe the dynamic process of the torpedo ladle car in real time, obtain the basic state information of the tank body during the transportation of the torpedo ladle car, and transmit it to the remote control center through the communication system 6; the temperature acquisition system is used to collect the hot metal temperature at different detection points on the outer surface of the torpedo ladle car 9 and transmit it to the data processing system through the communication system; the data processing system 5 is used to receive the data information transmitted by the temperature acquisition system and obtain the temperature data of each detection point in real time; the communication system 6 is used to wirelessly transmit the processed temperature data to the remote control center, so that the remote control center can realize the scheduling of each torpedo ladle car; the temperature anomaly alarm system 7 is used to receive the abnormal temperature information of the points detected by the temperature acquisition system and give an alarm warning for the temperature information of the abnormal points; the data processing system 5, the communication system 6, and the temperature anomaly alarm system 7 are all arranged in the control cabinet 8, and the control cabinet 8 is fixed on the transportation platform 11 at one end of the torpedo ladle car 9; the remote control center obtains the average temperature of the hot metal through the CFD simulation module.

[0023] Among them: the anti-disclosure technology in the communication system can ensure that the hot metal temperature drop data will not be randomly changed during the transmission process and will not be obtained by other users by illegal means; the signals sent by each torpedo ladle car will be received by the terminal signal receiver of the remote control center. The terminal signal receiver can ensure the arrival and end time points of the signals and the duration of each signal unit. A terminal signal receiver can receive the signals emitted by the signal transmitters of each torpedo ladle car and schedule each torpedo ladle car at the same time, so as to achieve one-to-many and many-to-one communication.

[0024] Embodiment 2

[0025] From Figure 4It can be seen that the detection system of the present invention: The image acquisition system 4 includes a camera 4.1, a mounting base 4.2, a lifting frame 4.3, a bracket 4.4, and a rotating table 4.5. The camera 4.1, the lifting frame 4.3, the bracket 4.4, the rotating table 4.5, and the mounting base 4.2 are arranged from top to bottom and are connected to each other in pairs; the mounting base 4.6 is fixed on the mounting bushing 10 at one end of the torpedo ladle car 9.

[0026] The rotating table 4.5 can rotate relative to the mounting base 4.2, and the lifting frame 4.3 can drive the camera 4.1 to move up and down; therefore, according to the needs of image acquisition, the position of the camera 4.1 can be adjusted through the rotating table 4.5 and the lifting frame 4.3 to collect accurate images of the torpedo ladle car.

[0027] Embodiment 3

[0028] From Figure 2 、 Figure 3 It can be seen that the detection system of the present invention: The temperature acquisition system includes a plurality of temperature detection devices, which are respectively fixed on a plurality of temperature detection points on the outer surface of the torpedo ladle car 9; the temperature detection points include the temperature detection point position 1 of the left end frustum of the torpedo ladle car 9, the temperature detection point position 2 of the middle cylinder, and the temperature detection point position 3 of the right end frustum.

[0029] The temperature detection point position 1, the temperature detection point position 2, and the temperature detection point position 3 are arranged along the length of the torpedo ladle car 9, ensuring the uniformity of the detection point settings.

[0030] Embodiment 4

[0031] From Figure 4 It can be seen that the detection system of the present invention: The temperature detection point position 1 of the left end frustum includes the upper left point position 1.1, the middle left point position 1.2, and the lower left point position 1.3. The temperature detection point position 3 of the right end frustum includes the upper right point position 3.1, the middle right point position 3.2, and the lower right point position 3.3. The temperature detection point position 2 of the middle cylinder includes the shoulder point position 2.1, the middle point position 2.2, and the bottom point position 2.3.

[0032] There are three upper, middle, and lower temperature detection points respectively arranged at the left, middle, and right positions of the torpedo ladle car 9, further ensuring the uniformity of the detection point settings and ensuring the rationality of the collected temperature. In this way, the molten iron temperature of different points of the torpedo ladle car is collected through the temperature detection devices at the nine point positions.

[0033] The setting method of the above nine point positions is only a reference; when determining the specific positions and quantities of the temperature detection points of the specific torpedo ladle car, the volume and position uniformity of the torpedo ladle car should be considered, and at the same time, the basic parameter information of the temperature measurement device should also be referred to to ensure the rationality of the information collected by the temperature acquisition system.

[0034] Embodiment 5

[0035] A detection method for evaluating the temperature drop of hot metal transported by a torpedo ladle car according to the present invention, and its specific steps are as follows:

[0036] ①. Adjust the initial state of the temperature detection device, fix it at the corresponding detection points on the outer surface of the torpedo ladle car, and use the image acquisition system to assist in adjusting the temperature detection device to a suitable position;

[0037] ②. Adjust the receiving mode of the data processing system so that the data information of each point can be normally transmitted into the data processing system to ensure the complete and accurate recording of the temperature change;

[0038] ③. Starting from the hot metal receiving stage of the torpedo ladle car, the temperature acquisition system starts to work, acquires the hot metal temperature at each detection point, and records the time corresponding to this temperature at the same time; when the hot metal receiving stage ends, acquires the hot metal temperature at each detection point, and records the time corresponding to this temperature at the same time; during the transportation of the torpedo ladle car, acquires the hot metal temperature at each detection point and records the time corresponding to this temperature; finally, generate a two-dimensional image of the whole process temperature changing with time: the vertical coordinate is the hot metal temperature and the horizontal coordinate is the corresponding time;

[0039] ④. The remote control center uses the computer CFD simulation module to simulate the temperature field distribution of the hot metal in the torpedo ladle car at any instant during the whole process under the corresponding transportation conditions and the change of the overall average temperature of the hot metal with time, so as to obtain the real-time average temperature of the hot metal.

[0040] In this way, before the torpedo ladle car pours the hot metal into the pouring ladle station, the average temperature of the hot metal can be accurately obtained, so that the operator can adjust the steelmaking production process to ensure the stability of production and guarantee the product quality. At the same time, the operator arranges the adjustment waiting and transportation time of the torpedo ladle car reasonably according to the law of the hot metal temperature drop obtained by the CFD simulation module, and reduces the energy consumption by changing the logistics scheduling of the hot metal.

[0041] Example 6

[0042] In step ③: Before the torpedo ladle car transports molten steel, adjust the position of the camera through the rotary table and the lifting frame, and adjust the focal length of the camera so that the image of the torpedo ladle car collected by the image acquisition system is clearly visible.

[0043] Example 7

[0044] Step ④ specifically includes: First, establish a 3D model corresponding to the torpedo ladle car in a drawing software, then perform pre-processing of the simulation, and then set the material parameters of the torpedo ladle and input the speed of the torpedo ladle car. Perform simulation according to the transportation conditions of the torpedo ladle car: Simulate the distribution of the molten iron temperature field at any instant and the change of the overall average temperature of the molten iron over time through the CFD simulation module, so as to obtain the average temperature of the molten iron at any moment, that is, the real-time average temperature. Among them, the temperature data of the data processing system verifies the rationality and reliability of the CFD simulation module to ensure the correctness of the simulation data.

[0045] Example 8

[0046] In step ④: The pre-processing of the simulation is as follows: The 3D model of the torpedo ladle car will be saved as an x-t file and imported into the Geometry module of fluent for detailed processing. Save all the structural models as a part and select co-node meshes for division.

[0047] Example 9

[0048] In step ④: The determination of the moving speed V of the torpedo ladle car during the transportation of molten iron includes the following steps: Ⅰ. The remote control center converts the video file of the torpedo ladle car obtained by the image acquisition system during the transportation stage into a corresponding picture set file through image processing technology, sets the time interval between each picture to 1 second, and obtains the photo set of the torpedo ladle car during the molten iron transportation period; Select two adjacent pictures before and after. Ⅱ. According to the pixel positions of the passing objects in the two pictures before and after, calculate the moving speed V of the torpedo ladle car in the forward direction at a certain moment. The speed V can be obtained by dividing the displacement X by the interval time of 1 second: Among them, X1 and X2 are the changes in the pixel coordinate positions of the reference object in the X direction in the two adjacent photos before and after a certain time node of the image acquisition system, Y1 and Y2 are the changes in the pixel coordinate positions in the Y direction, r is the ratio of the actual length to the unit pixel length, and f is the sampling frame rate set by the image acquisition system when shooting the video of the torpedo ladle car transportation process.

[0049] The moving speed of the torpedo ladle car provides a basis for setting the boundary conditions during the subsequent simulation by the CFD simulation module.

[0050] Example 10

[0051] In step ④: The acquisition of the average temperature of the molten iron is actually to discretize the molten iron unit into a finite number of sub-units, sum the molten iron temperatures at each unit node and then take the average as the average temperature of the molten iron obtained by the simulation.

[0052] The advantages of the detection system and detection method of the present invention are as follows: First, 1. The image acquisition system acquires images of the entire transportation process of the torpedo ladle car, thereby determining the movement speed V during the transportation of hot metal, providing a basis for setting boundary conditions during the simulation of the subsequent CFD simulation module; 2. The temperature acquisition system acquires data changes at temperature monitoring points during the entire transportation process of the torpedo ladle car, that is, collects data on the temperature drop of hot metal during the entire transportation process of the torpedo ladle car, and verifies the rationality and reliability of the simulation of the CFD simulation module; 3. The CFD simulation module simulates the temperature field distribution of hot metal at any instant and the change of the overall average temperature of hot metal over time, obtaining the average temperature of hot metal at any moment, that is, the real-time average temperature, so that the operator can adjust the production process in the steel area to ensure production stability and thus guarantee product quality; Second, continuously collect and record the temperature of hot metal during the entire transportation process of the torpedo ladle car, providing a basis for the study of the temperature drop law of hot metal, thereby reasonably arranging the adjustment waiting and transportation time of the torpedo ladle car, and reducing energy consumption by changing the logistics scheduling of hot metal.

[0053] In summary, the detection system and detection method of the present invention can obtain the average temperature of hot metal in real time, be applied in actual production and processing to ensure product quality; at the same time, it can reliably study the change process of temperature drop of hot metal during the complex transportation process to reduce energy consumption.

Claims

1. A detection system for evaluating the temperature drop during the transportation of hot metal by torpedo ladle cars, characterized in that: It includes an image acquisition system (4), a temperature acquisition system, a data processing system (5), a communication system (6), a temperature anomaly alarm system (7), and a control cabinet (8); the image acquisition system (4) is installed on the mounting bushing (10) at one end of the torpedo ladle car (9), and is used to observe the dynamic process of the torpedo ladle car in real time, obtain the basic information of the state of the ladle during the transportation of the torpedo ladle car, and transmit it to the remote control center through the communication system (6); the temperature acquisition system is used to collect the molten iron temperature at different detection points on the outer surface of the torpedo ladle car (9) and transmit it to the data processing system through the communication system; the data processing system (5) is used to receive the data information transmitted by the temperature acquisition system and obtain the temperature data of each detection point in real time; the communication system (6) is used to wirelessly transmit the processed temperature data to the remote control center, enabling the remote control center to achieve the scheduling of each torpedo ladle car; the temperature anomaly alarm system (7) is used to receive the abnormal temperature information of the points detected by the temperature acquisition system and alarm and warn the temperature information of the abnormal points; the data processing system (5), the communication system (6), and the temperature anomaly alarm system (7) are all set in the control cabinet (8), and the control cabinet (8) is fixed on the transportation platform (11) at one end of the torpedo ladle car (9); the remote control center obtains the average temperature of the molten iron through the CFD simulation module.

2. The detection system according to claim 1, wherein: The image acquisition system (4) includes a camera (4.1), a mounting seat (4.2), a lifting frame (4.3), a bracket (4.4), and a rotating table (4.5). The camera (4.1), the lifting frame (4.3), the bracket (4.4), the rotating table (4.5), and the mounting seat (4.2) are arranged from top to bottom and are connected to each other in pairs; the mounting seat (4.6) is fixed on the mounting bushing (10) at one end of the torpedo ladle car (9).

3. The detection system according to claim 1, characterized in that: The temperature acquisition system includes a plurality of temperature detection devices, which are respectively fixed at a plurality of temperature detection points on the outer surface of the torpedo ladle car (9); the temperature detection points include the temperature detection points (1) of the left end frustum of the torpedo ladle car (9), the temperature detection points (2) of the middle cylinder, and the temperature detection points (3) of the right end frustum.

4. The detection system according to claim 3, characterized in that: The temperature detection points (1) of the left end frustum include the upper left point (1.1), the middle left point (1.2), and the lower left point (1.3). The temperature detection points (3) of the right end frustum include the upper right point (3.1), the middle right point (3.2), and the lower right point (3.3). The temperature detection points (2) of the middle cylinder include the shoulder point (2.1), the middle point (2.2), and the bottom point (2.3).

5. A detection method for evaluating the temperature drop during the transportation of molten iron by a torpedo ladle car, and its specific steps are as follows: ①. Adjust the initial state of the temperature detection device, fix it at the corresponding detection points on the outer surface of the torpedo ladle car, and assist in adjusting the temperature detection device to a suitable position through the image acquisition system; ②. Adjust the receiving mode of the data processing system so that the data information of each point can be normally transmitted into the data processing system to ensure the complete and accurate recording of the temperature change situation; ③. Starting from the stage of receiving molten iron by the torpedo ladle car, the temperature acquisition system starts to work, acquires the molten iron temperature at each detection point, and simultaneously records the time corresponding to this temperature; After the stage of receiving molten iron ends, acquire the molten iron temperature at each detection point and record the time corresponding to this temperature; during the transportation of the torpedo ladle car, acquire the molten iron temperature at each detection point and record the time corresponding to this temperature; Finally, generate a two-dimensional image of the temperature change throughout the process with respect to time: the vertical axis is the molten iron temperature and the horizontal axis is the corresponding time; ④. The remote control center uses the computer CFD simulation module to simulate the temperature field distribution of the molten iron in the torpedo ladle car at any instant throughout the process under the corresponding transportation conditions and the change of the overall average temperature of the molten iron over time, so as to obtain the real-time average temperature of the molten iron.

6. The detection method according to claim 5, wherein: in step ③: before the torpedo ladle car transports molten steel, adjust the position of the camera through the rotary table and the lifting frame, and adjust the focal length of the camera so that the image of the torpedo ladle car collected by the image acquisition system is clearly visible.

7. The detection method according to claim 5, characterized in that: Step ④ is specifically as follows: first establish a three-dimensional model of the corresponding torpedo ladle car in the drawing software, then perform pre-processing of the simulation, and then set the material parameters of the torpedo ladle car and input the speed of the torpedo ladle car, and perform the simulation according to the transportation conditions of the torpedo ladle car: simulate the temperature field distribution of the molten iron at any instant and the change of the overall average temperature of the molten iron over time through the CFD simulation module, so as to obtain the average temperature of the molten iron at any moment, that is, the real-time average temperature; among them, the temperature data of the data processing system verifies the rationality and reliability of the CFD simulation module to ensure the correctness of the simulation data.

8. The detection method according to claim 7, characterized in that: step In ④: the pre-processing of the simulation is: the three-dimensional model of the torpedo ladle car will be saved as an x-t file and imported into the Geometry module of fluent for detailed processing, all structural models will be saved as a part, and co-node meshes will be selected for meshing.

9. The detection method according to claim 5, characterized in that: In step ④: the determination of the movement speed V of the torpedo ladle car when transporting molten iron includes the following steps: Ⅰ. The remote control center converts the video file of the torpedo ladle car obtained by the image acquisition system during the transportation stage into a corresponding picture set file through image processing technology, sets the time interval between each picture to 1 second, and obtains the photo set of the torpedo ladle car during the period of transporting molten iron; select two adjacent pictures before and after; II. According to the pixel positions of passing objects in the front and rear two pictures, calculate the moving speed V of the torpedo car along the forward direction at a certain moment. The speed V can be obtained by dividing the displacement X by the interval time of 1 second: Wherein, X1 and X2 are respectively the changes in the pixel coordinate positions of the reference object in the X direction in the adjacent pictures before and after a certain time node of the image acquisition system, Y1 and Y2 are respectively the changes in the pixel coordinate positions in the Y direction, r is the ratio of the actual length to the unit pixel length, and f is the sampling frame rate set by the image acquisition system when shooting the video of the torpedo car transportation process.

10. The detection method according to claim 5, characterized in that: In step ④: the acquisition of the average temperature of the molten iron is actually to discretize the molten iron unit into a finite number of sub-units, sum the molten iron temperatures at each unit node and then take the average as the average temperature of the molten iron obtained by simulation.

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