System and method for automatically measuring temperature of working roll

Abstract

The invention provides a working roll temperature automatic measuring system and method, and relates to the technical field of metallurgical industry hot rolling strip steel production automatic detection, and the working roll temperature automatic measuring system comprises a positioning device, a temperature measuring device, a speed acquisition module, a data processing system and a storage output module; the positioning device comprises a working roll positioning device and a roll changing trolley positioning device; the data processing system comprises a positioning data processing unit, a temperature data processing unit and a roller movement speed data processing unit; the positioning device, the temperature measuring device and the speed acquisition module are all in communication connection with the input end of the data processing system, and the output end of the data processing system is in communication connection with the storage output module. Full automation is guaranteed, the working efficiency is improved, no extra production time is occupied, the measurement process is full-automatic, and the efficiency is extremely high. According to the method, high density and high precision of data are ensured, a complete contour can be obtained, and a complete and continuous working roller axial temperature distribution curve can be generated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic detection of hot strip production in the metallurgical industry, in particular to a work roll temperature automatic measurement system and method. BACKGROUND

[0002] In hot strip production, the thermal crown of the work roll is a key factor affecting the accuracy of the plate shape calculation model, the stability of the rolling process, and the final product plate shape quality. During rolling, the area of the roll body in contact with the high-temperature strip experiences thermal expansion due to temperature rise, while the area not in contact with the strip has a lower temperature and a smaller expansion amount. This uneven thermal expansion forms the thermal crown of the work roll. To deeply study the influence of different rolling plans, especially the width specification changes, on the evolution of the work roll thermal crown, it is necessary to accurately obtain the temperature distribution of the work roll along the entire roll body length after it is removed from the machine. Currently, steel enterprises generally use manual measurement methods: after roll replacement, an operator uses a handheld contact temperature meter such as a point temperature gun to perform discrete measurement at a limited number of points, usually 3-5 points, along the roll axis. The drawbacks of this method are extremely prominent: first, manual measurement poses a personal safety risk and is inefficient; second, the sparse measurement points cannot capture complete temperature field information, especially in the area of the roll body corresponding to the strip edge, where the temperature gradient changes dramatically, and the limited number of measurement points cannot accurately depict the change profile, resulting in a large deviation between the calculated thermal crown and the actual value.

[0003] In the prior art, such as patent CN113182361B, a post-rolling roll temperature measurement scheme is provided, which inversely calculates the average temperature inside the roll by measuring the change of the roll surface temperature over time. Although this method improves the calculation efficiency of the average temperature, its ultimate goal and result is to obtain a single temperature value representing the overall thermal state, which cannot obtain the temperature distribution along the roll axis, and thus is of no help to application scenarios that require axial thermal profile to calculate the thermal crown.

[0004] Therefore, it is an urgent need to develop a system and method that can automatically, continuously, and accurately measure the temperature distribution of the entire work roll surface and generate a high-resolution temperature profile curve, to improve the level of hot strip shape control. Such technology will replace dangerous and inefficient manual operations and provide unprecedented data support for roll thermal behavior research, plate shape model optimization, and rolling strategy formulation. SUMMARY

[0005] The present application aims to solve the problem of existing work roll temperature automatic measurement systems and methods that rely on manual measurement, have sparse measurement points, and cannot obtain complete roll body temperature distribution.

[0006] In order to solve the above problems, the application provides a work roll temperature automatic measurement system, which comprises a positioning device, a temperature measuring device, a speed acquisition module, a data processing system and a storage output module; the positioning device comprises a work roll positioning device and a roll changing trolley positioning device; the data processing system comprises a positioning data processing unit, a temperature data processing unit and a roll movement speed data processing unit; the positioning device, the temperature measuring device and the speed acquisition module are in communication connection with the input end of the data processing system, and the output end of the data processing system is in communication connection with the storage output module.

[0007] The work roll temperature automatic measurement system and method provided by the application have the following beneficial effects, but are not limited to the following: The roll changing trolley positioning device in the positioning device is used to determine whether the roll changing trolley reaches a certain position, and the temperature measuring device is used to measure the roll temperature; when the roll changing trolley positioning signal and the roll positioning signal are started at the same time, the temperature measuring device starts to start and measure the work roll temperature. The data processing system controls the start and stop of the temperature measuring device, and receives the roll changing trolley movement speed in real time to determine the work roll movement speed; the data processing system also receives the work roll temperature real-time measurement data, and the temperature data is obtained by the temperature measuring device through a certain specific frequency measurement. According to the roll movement speed and the temperature measurement point number, the work roll temperature curve of different positions of the work roll body can be obtained. The storage output module is used to store the original measurement data, the processed temperature distribution curve, the associated roll number, the roll diameter, the measurement time and other information, and supports data query, display and export.

[0008] The application guarantees full automation and improves work efficiency, completely replaces dangerous, tedious and subjective manual measurement, realizes seamless completion of measurement in the standard roll changing process, does not occupy additional production time, and the measurement process is fully automatic and has extremely high efficiency. The application guarantees high density and high precision of data, a large number of temperature data points can be obtained through continuous scanning measurement, unprecedented high-resolution temperature field information is provided, and the precision is greatly improved. The application can obtain a complete contour, generate a complete and continuous work roll axial temperature distribution curve, and clearly reflect the temperature gradient and thermal expansion change law of the roll and the contact area, the non-contact area and the key strip steel edge transition area.

[0009] Further, the work roll positioning device is provided with two work roll positioning devices, and the two work roll positioning devices are respectively installed and arranged at the diameter center height of the upper work roll and the lower work roll in the work roll.

[0010] Further, the roll changing trolley positioning device is provided with four roll changing trolley positioning devices, and the four roll changing trolley positioning devices are uniformly arranged on both sides of the slide rail where the roll changing trolley travels.

[0011] Further, the work roll positioning device is a photoelectric sensor or a laser range finder, and the roll changing trolley positioning device is a proximity switch or a photoelectric sensor.

[0012] Further, the temperature measuring device comprises at least one non-contact temperature sensor.

[0013] Further, the temperature measuring device is installed below the work roll positioning device.

[0014] Further, the speed acquisition module is connected to the roll changing trolley driving system through a communication interface.

[0015] Further, the speed acquisition module is an additional encoder or a radar speedometer.

[0016] A work roll temperature automatic measurement method comprises the following steps: Step S1: Positioning trigger, the positioning device is used to monitor the roll changing trolley and the work roll, and a temperature measurement start signal is generated when the two reach a preset position at the same time. Step S2: Continuous temperature measurement, the temperature measuring device is started to continuously measure the work roll surface temperature at a fixed frequency and record the sampling time stamp. Step S3: Speed synchronous measurement, the movement speed of the roll changing trolley is acquired in real time as the axial movement speed of the work roll. Step S4: Data fusion and position mapping, the axial position corresponding to each temperature point is calculated according to the axial movement speed and the sampling time stamp of each temperature point. Step S5: Temperature profile generation, the axial positions and temperature values of all temperature points are associated to generate a work roll axial temperature distribution profile. Step S6: Measurement termination, a stop signal is generated and the temperature measurement is ended when the roll changing trolley reaches a preset stop measurement position.

[0017] Further, the work roll axial position calculation formula in step S4 is X_i=X_0+V×(T_i-T_0), wherein X_i is the axial position, X_0 is the starting reference position, V is the axial movement speed, T_i is the sampling time stamp, and T_0 is the measurement starting time.

[0018] A computer readable storage medium, the storage medium stores a computer program, when the computer program is executed by a processor, the work roll temperature automatic measurement method is realized. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A system block diagram of a work roll temperature automatic measurement system according to an embodiment of the present application.

[0020] Figure 2A working process schematic diagram of a work roll temperature automatic measurement system according to an embodiment of the present application.

[0021] Figure 3 A roll changing trolley working schematic diagram of a work roll temperature automatic measurement system according to an embodiment of the present application.

[0022] Figure 4 A work roll length and temperature measurement mapping diagram of a work roll temperature automatic measurement system according to an embodiment of the present application.

[0023] Explanation of reference signs: 1, workbench; 2, roll changing trolley; 3, work roll; 4, work roll positioning device; 5, roll changing trolley positioning device. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings which show the embodiments according to the present application. It should be understood that the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments described in the present application, all other embodiments obtained by those skilled in the art without creative effort shall fall within the scope of protection of the present application.

[0025] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include", "contain", "have", "with", "contain", "contain" and the like in the specification and claims of the present application and the above description of drawings are open-ended words. Therefore, a method or device "including", "containing", "having" one or more steps or elements has one or more steps or elements, but is not limited to only having the one or more elements. The terms "first", "second" and the like in the specification and claims of the present application or the above description of drawings are used to distinguish different objects, and are not used to describe a specific order or primary and secondary relationship. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more.

[0026] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "attaching" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] It should be emphasized that when the term "includes / contains" is used in the present specification, it is used to explicitly indicate the presence of the features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps, components or groups of features, integers, steps, components.

[0029] The term "and / or" in the present application is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects have an "or" relationship.

[0030] The purpose of the present application is to provide a kind of working roll temperature automatic measuring system and method, can replace the operation of manual measurement, automatically measure the temperature distribution of entire working roll surface, and then calculate the thermal expansion curve of working roll body, which is beneficial to study the thermal expansion change rule of the corresponding working roll area of strip steel edge.

[0031] Referring to Figures 1-4 A kind of working roll temperature automatic measuring system of the embodiment of the present application, including positioning device, temperature measuring device, speed acquisition module, data processing system and storage output module;The positioning device includes working roll positioning device 4 and roll changer trolley positioning device 5;Data processing system includes positioning data processing unit, temperature data processing unit and roll movement speed data processing unit;Positioning device, temperature measuring device, speed acquisition module are all and the input end of data processing system communication connection, the output end of data processing system and storage output module communication connection.

[0032] The roll changing trolley positioning device 5 in the positioning device is used to determine whether the roll changing trolley reaches a certain position, and the work roll positioning device 4 is used to determine whether the work roll reaches a certain position, and when both satisfy, it indicates that the current state is a normal roll changing state, and the system starts to measure the temperature of the work roll.

[0033] The temperature measuring device is used to measure the temperature of the work roll, and when the roll changing trolley positioning signal and the work roll positioning signal are started at the same time, the temperature measuring device starts to measure the temperature of the work roll.

[0034] The data processing system receives the trigger signal from the positioning device to control the start and stop of the temperature measuring device, receives the speed data from the speed acquisition module, receives the real-time temperature data stream from the temperature measuring device, performs the data fusion and position mapping steps to convert the time series temperature data into the temperature data in the axial spatial distribution, and generates and outputs the work roll axial position-temperature curve. When the roll changing trolley drags the work roll to the roll grinding room, the work roll is relatively static, and at this time, the movement speed of the work roll is the same as the speed of the roll changing trolley, and the data processing system receives the movement speed of the roll changing trolley in real time to determine the movement speed of the work roll; the data processing system also receives the real-time measurement data of the temperature of the work roll, and the temperature data is obtained by a certain specific frequency measurement. According to the work roll movement speed and the number of temperature measurement points, the work roll temperature curve at different positions of the work roll body can be obtained.

[0035] The storage output module is a computer readable storage medium, which is used to store original measurement data, processed temperature distribution curve, associated roll number, roll diameter, measurement time and the like, and supports data query, display and export. The real-time movement speed of the work roll and the real-time measurement temperature of the work roll surface can be stored, and the corresponding axial position of the work roll of different temperature measurement points can be calculated through the speed and time, and finally the corresponding curve of the axial position of the work roll and the body temperature of the work roll is given.

[0036] The present application guarantees full automation and improves work efficiency, completely replaces dangerous, tedious and subjective manual measurement, realizes seamless completion of measurement in the standard roll changing process, does not occupy additional production time, and the measurement process is fully automatic and highly efficient.

[0037] The present application guarantees high density and high precision of data, and a large number of temperature data points can be obtained through continuous scanning measurement, for example, 0.05 data points per millimeter of roll body length can be obtained at a speed of 0.2 m / s and a frequency of 10 Hz, which is much higher than the 5 points of manual measurement. This provides unprecedented high-resolution temperature field information, and the precision is greatly improved.

[0038] The present application can obtain complete profiles, can generate complete and continuous working roll axial temperature distribution curves, and clearly reflects the temperature gradient and thermal expansion change law of the contact area, non-contact area and key strip edge transition area of the roll, which cannot be achieved by discrete point measurement.

[0039] The present application supports advanced research and optimization, and the obtained high-precision temperature distribution data is a valuable data basis for calculating working roll thermal crown, calibrating shape model, optimizing rolling plan, especially width transition strategy, and researching the coupling relationship between roll wear and thermal behavior, which is of great significance to improve the level of hot rolling shape control.

[0040] The present application has high system integration: the device structure is compact, the existing roll changing track and process are used, automatic triggering and control are realized through clever positioning logic, it is easy to modify and implement on the existing rolling line, and the reliability is good.

[0041] Further, the working roll positioning device 4 is provided with two, and the two working roll positioning devices 4 are respectively installed and arranged at the diameter center height of the upper working roll and the lower working roll in the working roll 3.

[0042] The working roll positioning device 4 is used to detect whether the working roll reaches the temperature measurement starting area, Further, the roll changing trolley positioning device 5 is provided with four, and the four roll changing trolley positioning devices 5 are evenly arranged on both sides of the slide rail on which the roll changing trolley 2 travels.

[0043] The roll changing trolley 2 and the working roll 3 are arranged below the workbench 1, and the roll changing trolley 2 and the working roll 3 facilitate work below the workbench 1, and the roll changing trolley positioning device 5 is used to cooperatively judge the roll changing process state and provide a position reference. Two of them are used to trigger the temperature measurement of the upper and lower working rolls, respectively, and the other two are used to trigger the temperature measurement to stop.

[0044] Further, the working roll positioning device 4 is a photoelectric sensor or a laser range finder, and the roll changing trolley positioning device 5 is a proximity switch or a photoelectric sensor.

[0045] According to different detection objects and targets, the most suitable, most reliable and highest cost-effective sensor type is accurately selected, thereby providing a solid hardware foundation for realizing stable and reliable automatic triggering of the entire system in a harsh industrial environment.

[0046] Further, the temperature measuring device comprises at least one non-contact temperature sensor, such as an infrared temperature measuring instrument, which is installed close to the corresponding working roll positioning device 4. It is configured to continuously scan the roll surface temperature at a certain frequency, such as 10Hz, after receiving the start signal.

[0047] Further, the speed acquisition module is connected with the roll-changing trolley driving system through a communication interface. In industrial automation, the roll-changing trolley is usually driven by a motor such as an AC asynchronous motor or a servo motor, and precisely controlled by a driving system such as a frequency converter or a servo driver. The driving system will calculate and strictly monitor the motor speed in real time. Through the encoder feedback on the motor shaft or internal model calculation, the driving system can obtain the actual speed of the motor with extremely high precision and refresh rate, and combined with the reduction ratio of the transmission mechanism such as the gear box and the wheel, the real-time linear speed of the trolley, that is, the working roll, can be accurately converted.

[0048] Further, the speed acquisition module is an additional encoder or radar speedometer.

[0049] The additional encoder or radar speedometer can measure the speed of the trolley through an independent speed measuring device or sensor, facilitate the subsequent work, ensure safety, and facilitate the use of the device.

[0050] Additional encoder: usually installed on the driven wheel shaft of the trolley or a specific measuring roll beside the track. It accurately measures the angular velocity by calculating the number of pulses emitted per unit time, and converts it into linear speed according to the wheel diameter. It is a contact and indirect measurement method. Radar speedometer: a non-contact speed sensor that emits electromagnetic waves to moving objects (trolley body) and receives echoes, and calculates the direct linear speed of the object using the Doppler effect. It is a non-contact and direct measurement method.

[0051] Further, the temperature measuring device is installed below the working roll positioning device 4.

[0052] Installed below the working roll positioning device 4 usually means that the temperature measuring device is directed at the middle and lower part of the roll body. Avoiding the interference of cooling water and impurities: after the working roll is removed from the machine, the roll surface may be contaminated with cooling water, rolling oil, or iron oxide scale. Due to the action of gravity, these contaminants are more likely to accumulate at the very bottom of the roll body. Installing the temperature measuring device in the middle and lower part, rather than the very bottom, can effectively avoid the area where the contaminants are most concentrated, thus measuring a relatively clean surface that better represents the true temperature of the roll surface. Providing a consistent measurement angle: compared to the front side, the middle and lower part provides a stable and consistent measurement angle, which helps to reduce measurement errors caused by changes in the angle of view. Arranging two functionally different but closely related devices (positioning and temperature measurement) vertically next to each other reflects the idea of highly integrated design: in the crowded environment of the rolling mill, this vertical stacking layout saves more space than the horizontal parallel layout, facilitating installation on both sides of the existing roll-changing roll, without the need for large-scale civil engineering modification.

[0053] A working roll temperature automatic measurement method, comprising the following steps: Step S1: Position trigger, monitor the roll changing trolley and the work roll by positioning devices, generate a temperature measurement start signal when both reach the preset position; By positioning devices arranged on both sides of the roll changing table, the positions of the roll changing trolley and the work roll are monitored in real time. When the roll changing trolley positioning device 5 and the work roll positioning device 4 detect the target at the same time, it is determined that the normal roll changing state is reached, and a temperature measurement start signal is generated.

[0054] Step S2: Continuous temperature measurement, start the temperature measurement device to continuously measure the work roll surface temperature at a fixed frequency and record the sampling time stamp; The temperature measurement start signal starts the temperature measurement device to continuously measure the work roll surface temperature passing through its detection area at a fixed sampling frequency, and records the sampling time stamp corresponding to each temperature data point.

[0055] Step S3: Speed synchronization measurement, real-time acquisition of the motion speed of the roll changing trolley as the axial motion speed of the work roll; The motion speed of the roll changing trolley is acquired in real time, and since the work roll is relatively stationary with the roll changing trolley during the dragging process, the speed is taken as the axial motion speed of the work roll.

[0056] Step S4: Data fusion and position mapping, according to the axial motion speed and the sampling time stamp of each temperature point, the corresponding axial position of each temperature point is calculated; According to the axial motion speed of the work roll and the sampling time stamp of each temperature data point, the corresponding axial position of each temperature data point is calculated. The calculation formula is: the axial position of a certain temperature measurement point = measurement starting reference position + (the sampling time of the point - the measurement starting time) × the axial motion speed of the work roll.

[0057] Step S5: Temperature profile generation, associate the axial positions of all temperature points with the temperature values to generate the axial temperature distribution profile of the work roll; The axial positions of all temperature measurement points are associated with their measured temperature values to generate a complete work roll axial position-roller body temperature corresponding curve, i.e. the work roll temperature distribution profile.

[0058] Step S6: Measurement termination, when the roll changing trolley reaches the preset stop measurement position, a stop signal is generated and the temperature measurement is ended.

[0059] When the roll changing trolley positioning device 5 is triggered again and reaches the preset measurement end position, a temperature measurement stop signal is generated, and the system stops temperature measurement.

[0060] The work roll temperature automatic measurement method mainly refers to that after the finishing work roll is taken off, the work roll needs to be dragged back to the roll grinding room by the roll changing trolley for grinding, and the process that the work roll is dragged back to the roll grinding room by the roll changing trolley is detected and temperature measurement is performed by the temperature measuring device arranged on both sides of the roll changing table, the measurement data is automatically saved to the system and named by the roll number, and the temperature data can also be exported.

[0061] Further, the work roll axial position calculation formula in the step S4 is X_i=X_0+Vx(T_i-T_0), wherein X_i is the axial position, X_0 is the starting reference position, V is the axial movement speed, T_i is the sampling time stamp, and T_0 is the measurement starting time.

[0062] The key conversion from original data to useful information is completed. The 'generator' of the high-resolution temperature profile: connects discrete points into continuous and meaningful curves. With simple principles and models, the complex industrial detection problem is solved. It is this formula that makes the 'automatic acquisition of the entire roll surface temperature distribution of the work roll' from a beautiful idea into a precise and reliable technical solution that can be implemented.

[0063] A computer readable storage medium, characterized in that, the storage medium has a computer program stored thereon, when the computer program is executed by a processor, a work roll temperature automatic measurement method is realized.

[0064] The operation of manual measurement can be replaced, and the temperature distribution of the entire work roll roll surface is automatically measured, and then the work roll roll body thermal expansion curve is calculated, which is beneficial to research the thermal expansion change law of the work roll area corresponding to the strip steel edge.

[0065] The application scenario of the present application is that the roll changing trolley drags the work roll to run on the track below the operation table during the roll changing process, the work roll positioning signal is triggered when the work roll reaches a position, the trolley positioning signal is triggered when the trolley reaches a position, and then the work roll temperature start measurement or end measurement signal is triggered, so that the automatic measurement and processing of the work roll temperature are realized.

[0066] Although the present application is disclosed as above, the protection scope of the present application is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and these changes and modifications will fall within the protection scope of the present application.

Claims

1. A work roll temperature automatic measuring system characterized by comprising: The application relates to a work roll temperature automatic measurement device and method.

2. The automatic work roll temperature measurement system of claim 1 wherein, The work roll positioning device (4) is provided with two work roll positioning devices (4) which are respectively arranged at the diameter center height of upper work rolls and lower work rolls in work rolls (3); the roll changing trolley positioning device (5) is provided with four roll changing trolley positioning devices (5) which are evenly arranged on both sides of slide rails where the roll changing trolley (2) travels.

3. The automatic work roll temperature measurement system of claim 2 wherein, The work roll positioning device (4) is an optical sensor or a laser range finder, and the roll changing trolley positioning device (5) is a proximity switch or an optical sensor.

4. The automatic work roll temperature measurement system of claim 3 wherein, The temperature measuring device comprises at least one non-contact temperature sensor.

5. The automatic work roll temperature measurement system of claim 4 wherein, The temperature measuring device is arranged below the work roll positioning device (4).

6. The automatic work roll temperature measurement system of claim 5 wherein, The speed acquisition module is connected with a roll changing trolley driving system through a communication interface.

7. The automatic work roll temperature measurement system of claim 6 wherein, The speed acquisition module is an additional encoder or a radar speed meter.

8. A method of automatically measuring the temperature of a work roll, characterized by, Step S1: positioning triggering, the roll changing trolley and the work roll are monitored through the positioning device, and when the two reach the preset positions at the same time, a temperature measurement starting signal is generated; Step S2: continuous temperature measurement, the temperature measuring device is started, the work roll surface temperature is continuously measured at a fixed frequency, and a sampling time stamp is recorded; Step S3: speed synchronous measurement, the motion speed of the roll changing trolley is acquired in real time as the axial motion speed of the work roll; Step S4: data fusion and position mapping, the axial position corresponding to each temperature point is calculated according to the axial motion speed and the sampling time stamp of each temperature point; Step S5: temperature profile generation, the axial positions and temperature values of all temperature points are associated, and a work roll axial temperature distribution profile is generated; Step S6: measurement termination, when the roll changing trolley reaches the preset stop measurement position, a stop signal is generated and the temperature measurement is ended.

9. The method of claim 8, wherein the step of measuring the temperature of the work roll is performed by a non-contact temperature measuring device. In the step S4, the work roll axial position calculation formula is X_i=X_0+Vx(T_i-T_0), wherein X_i is the axial position, X_0 is a starting reference position, V is the axial motion speed, T_i is the sampling time stamp, and T_0 is the measurement starting time.

10. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, and when the computer program is executed by the processor, the work roll temperature automatic measurement method is realized.

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