Method for automatically detecting steel plate

Abstract

The invention belongs to the technical field of medium and thick plate instruments, and provides a method for automatically detecting a steel plate, the width of the steel plate is detected by using a detection device, the detection device comprises a camera component and a laser instrument, the camera component is arranged above a roller way, and the laser instrument is arranged at the edge of the roller way; the method for automatically detecting the steel plate comprises the following steps: identifying the edge of the steel plate by using a laser and determining the measured central zero position of the steel plate; acquiring position information of two ends of the steel plate by using a camera component, wherein the position information comprises multiple groups of coordinate data; calculating the width of the steel plate according to the coordinate data to obtain a plurality of steel plate width data, and averaging; comparing the width data of the plurality of steel plates to obtain the maximum width and the minimum width; comparing the maximum width and the minimum width with a preset width range, and when the maximum width or the minimum width exceeds the preset width range, sending out a narrowing early warning and recording; the steel plate width detection precision is improved, deviation is reduced, rolling narrowing accidents are reduced, and the steel plate yield is improved.

Description

Technical Field

[0001] The invention relates to the technical field of medium and thick plate instruments, and in particular to a method for automatically detecting steel plates. Background Art

[0002] In the process of plate production, whether it is the rolling process or the final product inspection process, in order to obtain a higher plate width value and the best rolling process, the plate width measurement system has become one of the indispensable equipment on the production line. The width gauge is a device that uses a high-precision linear array to measure the width of an object.

[0003] During the use of existing width gauge equipment, the steel plate will tilt, which will affect the actual measured width data. The equipment cannot eliminate the influence of the steel plate tilt on the measured width, and the measurement accuracy is low. It is easy to cause narrowing accidents due to accuracy problems, resulting in low rough rolling yield rate, and the guiding significance for improving the yield rate is insufficient. In addition, the display screen of the existing equipment can only display the current steel information and width curve, the data storage capacity is small, the storage time is short, and it is not convenient for data query. Therefore, the existing width gauge equipment cannot meet the existing production needs. Summary of the invention

[0004] In view of the shortcomings of the prior art mentioned above, the purpose of the present invention is to provide a method for automatically detecting steel plates, which is used to solve the problem that the width gauge equipment in the prior art cannot eliminate the influence of the steel plate inclination on the measured width, the measurement accuracy is low, and narrowing accidents are prone to occur, resulting in low rough rolling yield and inability to meet production needs.

[0005] To achieve the above-mentioned object and other related objects, the present invention provides a method for automatically detecting steel plates, wherein a detection device is used to detect the width of the steel plates, wherein the detection device comprises a camera assembly and a laser instrument, wherein the camera assembly is arranged above a roller table, and the laser instrument is arranged at the edge of the roller table; the method for automatically detecting steel plates comprises:

[0006] Use laser instrument to identify the edge of steel plate and determine the center zero position of steel plate measurement;

[0007] Using a camera assembly to obtain position information of both ends of the steel plate, the position information includes multiple sets of coordinate data;

[0008] Calculate the width of the steel plate according to the coordinate data, obtain multiple steel plate width data, and take the average value;

[0009] Compare multiple steel plate width data to obtain the maximum width and the minimum width;

[0010] The maximum width and the minimum width are compared with the preset width range. When the maximum width or the minimum width exceeds the preset width range, a narrowing warning is issued and recorded.

[0011] Optionally, the camera assembly includes a first camera group and a second camera group, and the first camera group and the second camera group each include two camera lenses.

[0012] Optionally, when a rough rolling and steel throwing signal is received, the camera lens starts to scan the steel plate, and the scanning ranges of the first camera group and the second camera group are both within a preset width range.

[0013] Optionally, the step of using a laser instrument to identify the edge of the steel plate and determine the center zero position of the steel plate measurement specifically includes:

[0014] Based on the center zero position, an XY coordinate system is formed on the steel plate and the roller.

[0015] Optionally, the step of using a camera assembly to obtain position information of both ends of the steel plate, wherein the position information includes multiple sets of coordinate data, specifically includes:

[0016] The coordinate data is the position of the two ends of the steel plate in the XY coordinate system (X 1 ,Y 1 ) and (X 2 ,Y 2 ).

[0017] Optionally, the step of calculating the width of the steel plate according to the coordinate data, obtaining a plurality of steel plate width data, and taking an average value specifically includes:

[0018] The calculation formula for the width of the steel plate is:

[0019]

[0020] Optionally, the step of comparing the maximum width and the minimum width with a preset width range and issuing a narrowing warning and recording when the maximum width or the minimum width exceeds the preset width range specifically includes:

[0021] The preset width is W, and the preset width range is 1500mm≤W≤4300mm.

[0022] As described above, the method for automatically detecting steel plates of the present invention has at least the following beneficial effects:

[0023] The edge of the steel plate is identified by a laser instrument to determine the center zero position of the steel plate measurement; the position information of the two ends of the steel plate is obtained by a camera component, and the position information includes multiple sets of coordinate data; the width of the steel plate is calculated according to the coordinate data to obtain multiple steel plate width data and take an average value; the multiple steel plate width data are compared to obtain the maximum width and the minimum width; the maximum width and the minimum width are compared with the preset width range, and when the maximum width or the minimum width exceeds the preset width range, a narrowing warning is issued and recorded; the problem that the width measuring instrument equipment in the prior art cannot eliminate the influence of the steel plate tilt on the measured width, the measurement accuracy is low, and narrowing accidents are prone to occur, resulting in a low rough rolling yield and failure to meet production needs is solved. By obtaining the coordinate data of the steel plate, the width of the steel plate is calculated multiple times and the average value is taken, the influence of the steel plate tilt on the measured width is eliminated, and the maximum width and the minimum width are compared with the preset width range, and an alarm is issued in time to prevent narrowing accidents, thereby improving the steel plate width detection accuracy, reducing deviations, reducing narrowing accidents, and improving the steel plate yield.

[0024] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0026] Figure 1 It is a schematic flow chart of a method for automatically detecting steel plates shown in an exemplary embodiment of the present application;

[0027] Figure 2 It is a schematic diagram of the overall installation of a detection device used in a method for automatically detecting steel plates, shown as an exemplary embodiment of the present application.

[0028] In the figure: 1-heat exchanger; 2-protective cover; 3-camera lens; 4-steel plate; 5-roller; 6-laser. DETAILED DESCRIPTION

[0029] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0030] It should be noted that the diagram provided in the present embodiment only illustrates the basic concept of the present invention in a schematic manner, so the diagram only shows the components related to the present invention rather than drawing according to the number, shape and size of the components during actual implementation. The type, quantity and ratio of each component during actual implementation can be a random change, and the component layout type may also be more complicated. The structure, ratio, size, etc. illustrated in the drawings of the present specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can implement, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect that the present invention can produce and the purpose that can be achieved. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of narration, and are not used to limit the scope of the present invention. The change or adjustment of its relative relationship should also be regarded as the scope of the present invention without substantially changing the technical content.

[0031] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0032] In an exemplary embodiment, see Figure 1 , Figure 1 The present invention is a schematic flow chart of a method for automatically detecting steel plates, which is shown as an exemplary embodiment of the present invention. The present invention exemplarily provides a method for automatically detecting steel plates, wherein a detection device is used to detect the width of the steel plates. The detection device includes a camera assembly and a laser instrument. The camera assembly is arranged above the roller, and the laser instrument is arranged at the edge of the roller. The method for automatically detecting steel plates includes at least the following steps:

[0033] Step S110, using a laser instrument to identify the edge of the steel plate and determine the center zero position of the steel plate measurement;

[0034] Step S120, using a camera assembly to obtain position information of both ends of the steel plate, the position information including multiple sets of coordinate data;

[0035] Step S130, calculating the width of the steel plate according to the coordinate data, obtaining a plurality of steel plate width data, and taking an average value;

[0036] Step S140, comparing multiple steel plate width data to obtain a maximum width and a minimum width;

[0037] Step S150, comparing the maximum width and the minimum width with a preset width range, when the maximum width or the minimum width exceeds the preset width range, issuing a narrowing warning and recording it.

[0038] For step S110, the edge of the steel plate is identified by a laser instrument to determine the center zero position of the steel plate measurement, which specifically includes:

[0039] Based on the center zero position, an XY coordinate system is formed on the steel plate and roller table;

[0040] In step S120, the position information of both ends of the steel plate is obtained by using a camera assembly. The position information includes multiple sets of coordinate data, specifically including:

[0041] The coordinate data is the position of the two ends of the steel plate in the XY coordinate system (X 1 ,Y 1 ) and (X 2 ,Y 2 );

[0042] For step S130, the width of the steel plate is calculated according to the coordinate data to obtain a plurality of steel plate width data and take an average value, which specifically includes:

[0043] The calculation formula for the width of the steel plate is:

[0044]

[0045] For step S140 and step S150, the preset width is W, and the preset width range is 1500 mm≤W≤4300 mm.

[0046] In this embodiment, a display device is also provided for forming a width curve of the current steel plate from coordinate data and displaying it on the display device. The display device can also display parameter information such as the number, set width, set thickness, speed, etc. of the next steel plate. When communication with the rolling line computer fails, the steel coil number and set width are reserved for manual entry and modification end correction to ensure stable production of the rolling line.

[0047] The edge of the steel plate is identified by a laser instrument to determine the center zero position of the steel plate measurement; the position information of the two ends of the steel plate is obtained by a camera component, and the position information includes multiple sets of coordinate data; the width of the steel plate is calculated according to the coordinate data to obtain multiple steel plate width data and take an average value; the multiple steel plate width data are compared to obtain the maximum width and the minimum width; the maximum width and the minimum width are compared with the preset width range, and when the maximum width or the minimum width exceeds the preset width range, a narrowing warning is issued and recorded; the problem that the width measuring instrument equipment in the prior art cannot eliminate the influence of the steel plate tilt on the measured width, the measurement accuracy is low, and narrowing accidents are prone to occur, resulting in a low rough rolling yield and failure to meet production needs is solved. By obtaining the coordinate data of the steel plate, the width of the steel plate is calculated multiple times and the average value is taken, the influence of the steel plate tilt on the measured width is eliminated, and the maximum width and the minimum width are compared with the preset width range, and an alarm is issued in time to prevent narrowing accidents, thereby improving the steel plate width detection accuracy, reducing deviations, reducing narrowing accidents, and improving the steel plate yield.

[0048] In this embodiment, a detection device installation scheme is also provided. Figure 2 , Figure 2 The overall installation diagram of a detection device used in a method for automatically detecting steel plates is shown as an exemplary embodiment of the present application, specifically comprising:

[0049] The camera assembly is arranged above the roller 5, and the laser instrument 6 is arranged at the edge of the roller 5. The camera assembly includes a first camera group and a second camera group. The first camera group and the second camera group each include two camera lenses 3. The 3D vision technology is simulated by each group of two camera lenses 3 to ensure the detection accuracy.

[0050] Specifically, the camera lens 3 has temperature detection and over-temperature power-off protection functions inside to ensure that the camera lens 3 can perform detection normally;

[0051] When receiving the rough rolling steel throwing signal, the camera lens 3 starts to scan the steel plate 4, and the scanning ranges of the first camera group and the second camera group are both within the preset width range, ensuring that the scanning lines of the first camera group and the second camera group overlap to ensure detection accuracy;

[0052] The detection device also includes a protective cover 2 for installing and protecting the camera lens 3. A heat exchanger 1 is arranged in the protective cover 2. In this embodiment, the heat exchanger 1 is a water-cooled heat exchanger. The heat exchanger 1 is used to achieve constant temperature of the protective cover 2 to protect the camera lens 3.

[0053] By adopting the above installation scheme, the width of the steel plate is detected, the detection accuracy is improved, the influence of the steel plate tilt on the measured width is eliminated, the deviation is reduced, the rolling narrowing accidents are reduced, and the steel plate yield rate is improved.

[0054] In summary, the specific usage and functions of this embodiment are as follows:

[0055] The edge of the steel plate is identified by a laser instrument to determine the center zero position of the steel plate measurement; the position information of the two ends of the steel plate is obtained by a camera component, and the position information includes multiple sets of coordinate data; the width of the steel plate is calculated according to the coordinate data to obtain multiple steel plate width data and take an average value; the multiple steel plate width data are compared to obtain the maximum width and the minimum width; the maximum width and the minimum width are compared with the preset width range, and when the maximum width or the minimum width exceeds the preset width range, a narrowing warning is issued and recorded; the problem that the width measuring instrument equipment in the prior art cannot eliminate the influence of the steel plate tilt on the measured width, the measurement accuracy is low, and narrowing accidents are prone to occur, resulting in a low rough rolling yield and failure to meet production needs is solved. By obtaining the coordinate data of the steel plate, the width of the steel plate is calculated multiple times and the average value is taken, the influence of the steel plate tilt on the measured width is eliminated, and the maximum width and the minimum width are compared with the preset width range, and an alarm is issued in time to prevent narrowing accidents, thereby improving the steel plate width detection accuracy, reducing deviations, reducing narrowing accidents, and improving the steel plate yield.

[0056] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for automatically detecting steel plates, characterized in that: The width of the steel plate is detected by using a detection device, the detection device includes a camera assembly and a laser instrument, the camera assembly is arranged above the roller, and the laser instrument is arranged at the edge of the roller; the method for automatically detecting the steel plate includes: Use laser instrument to identify the edge of steel plate and determine the center zero position of steel plate measurement; Using a camera assembly to obtain position information of both ends of the steel plate, the position information includes multiple sets of coordinate data; Calculate the width of the steel plate according to the coordinate data, obtain multiple steel plate width data, and take the average value; Compare multiple steel plate width data to obtain the maximum width and the minimum width; The maximum width and the minimum width are compared with the preset width range. When the maximum width or the minimum width exceeds the preset width range, a narrowing warning is issued and recorded.

2. The method for automatically detecting steel plates according to claim 1, characterized in that: The camera assembly includes a first camera group and a second camera group, and the first camera group and the second camera group each include two camera lenses.

3. The method for automatically detecting steel plates according to claim 2, characterized in that: When a rough rolling and steel throwing signal is received, the camera lens starts to scan the steel plate, and the scanning ranges of the first camera group and the second camera group are both within a preset width range.

4. The method for automatically detecting steel plates according to claim 2, characterized in that: The detection device also includes a protective cover for installing and protecting the camera lens, and a heat exchanger is arranged in the protective cover.

5. The method for automatically detecting steel plates according to claim 1, characterized in that: The step of using a laser instrument to identify the edge of the steel plate and determine the center zero position of the steel plate measurement specifically includes: Based on the center zero position, an XY coordinate system is formed on the steel plate and the roller.

6. The method for automatically detecting steel plates according to claim 1, characterized in that: The step of using a camera assembly to obtain position information of both ends of the steel plate, wherein the position information includes multiple sets of coordinate data, specifically includes: The coordinate data are the positions (X1, Y1) and (X2, Y2) of the two end edges of the steel plate in the XY coordinate system.

7. The method for automatically inspecting steel plates according to claim 1, characterized in that: The step of calculating the width of the steel plate according to the coordinate data, obtaining a plurality of steel plate width data, and taking an average value specifically includes: The calculation formula for the width of the steel plate is:

8. The method for automatically detecting steel plates according to claim 1, characterized in that: The step of comparing the maximum width and the minimum width with the preset width range and issuing a narrowing warning and recording when the maximum width or the minimum width exceeds the preset width range specifically includes: The preset width is W, and the preset width range is 1500mm≤W≤4300mm.

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