Slab overlength detection method, device, equipment and readable storage medium

Abstract

The application discloses a slab over-length detection method, device, equipment and readable storage medium. The method comprises detecting a target slab every interval of a preset time length, obtaining n thickness difference values arranged in time sequence, the n thickness difference values corresponding to n detection points one by one, and the n detection points being distributed on the target slab in turn and at intervals along a head-to-tail direction of the target slab. In the case that the i-th thickness difference value to the i+m-th thickness difference value is less than or equal to a first preset threshold, a first distance of a detection point P i+m corresponding to the i+m-th thickness difference value to the head is determined, a second distance of the detection point corresponding to the i-th thickness difference value to the detection point corresponding to the i+m-th thickness difference value is determined, and the over-length of the slab is calculated according to the first distance and the second distance, wherein n, m and i are positive integers, and i+m is less than or equal to n. According to the slab over-length detection method, device, equipment and readable storage medium, the over-length of the slab can be detected.

Description

Technical Field

[0001] This application belongs to the field of steel rolling technology, and in particular relates to a method, device, equipment and readable storage medium for detecting slab length deviation. Background Technology

[0002] During the hot rolling process, it is difficult to accurately control the head thickness of the slab, resulting in uneven head thickness of the cold-rolled raw material. The head thickness of the cold-rolled slab may exceed the tolerance, and the length of the deviation varies from slab to slab, making it difficult to measure. Summary of the Invention

[0003] This application provides a method, device, equipment, and readable storage medium for detecting the out-of-tolerance length of a slab, which can detect the out-of-tolerance length of the slab.

[0004] The first aspect of this application provides a method for detecting the out-of-tolerance length of a slab, the method comprising:

[0005] The target slab is tested at preset intervals to obtain n thickness differences arranged in time sequence. The n thickness differences correspond one-to-one with n detection points. The n detection points are distributed on the target slab at intervals along the direction from the beginning to the end of the strip.

[0006] If all thickness differences from the i-th thickness difference to the (i+m)-th thickness difference are less than or equal to a first preset threshold, then the detection point P corresponding to the (i+m)-th thickness difference is determined. i+m The first distance to the leader is used to determine the second distance from the detection point corresponding to the i-th thickness difference to the detection point corresponding to the (i+m)-th thickness difference.

[0007] The deviation length of the slab is calculated based on the first distance and the second distance, where n, m, and i are positive integers, and i+m≤n.

[0008] According to the implementation of the first aspect of this application, when all thickness differences from the i-th thickness difference to the (i+m)-th thickness difference are less than or equal to a first preset threshold, a detection point P corresponding to the (i+m)-th thickness difference is determined. i+m The first distance to the leader, and the second distance from the detection point corresponding to the i-th thickness difference to the detection point corresponding to the (i+m)-th thickness difference, including:

[0009] Get historical count values;

[0010] If the historical count value equals the second preset threshold, determine the detection point P corresponding to the (i+m)th thickness difference value. i+m The first distance to the leader is used to determine the second distance from the detection point corresponding to the i-th thickness difference to the detection point corresponding to the (i+m)-th thickness difference.

[0011] The historical count value is the cumulative value of the number of first thickness differences, and the first thickness difference is the thickness difference that continuously satisfies being less than or equal to a first preset threshold.

[0012] According to any of the foregoing embodiments of the first aspect of this application, after detecting the target slab at preset time intervals and obtaining n thickness differences arranged in time sequence, the process includes:

[0013] Get historical count values;

[0014] For thickness differences arranged chronologically, if the thickness difference is less than or equal to a first preset threshold, the historical count value is incremented by one.

[0015] For thickness differences arranged chronologically, if the thickness difference is greater than a first preset threshold, the historical count value is updated to a preset initial value.

[0016] According to any of the foregoing embodiments of the first aspect of this application, detecting a target slab includes detecting the target slab at the exit of the rolling mill, and the method further includes:

[0017] Obtain the third distance from the tail of the target slab to the exit of the rolling mill equipment;

[0018] If the third distance is greater than or equal to the second preset threshold, the historical count value is updated to the preset initial value.

[0019] According to any of the foregoing embodiments of the first aspect of this application, the rolling mill equipment includes a plurality of frames arranged sequentially along the movement path of the slab, the plurality of frames including an adjacent first frame and a second frame, the target slab passing through the first frame and the second frame sequentially, and the second preset threshold is the distance from the entrance of the first frame to the exit of the second frame.

[0020] According to any of the foregoing embodiments of the first aspect of this application, the target slab is detected at preset time intervals to obtain n thickness differences arranged in time sequence, including:

[0021] The target slab is detected at preset time intervals to obtain n thickness values ​​arranged in time sequence;

[0022] Based on n thickness values ​​and a preset target thickness, n thickness differences are calculated and arranged in time sequence.

[0023] According to any of the foregoing embodiments of the first aspect of this application, before detecting the target slab at preset time intervals and obtaining n thickness differences arranged in time sequence, the method further includes:

[0024] Obtain the classification information and preset target thickness of the target slab;

[0025] The first preset threshold corresponding to the target slab is determined according to the preset mapping relationship. The preset mapping relationship includes the mapping relationship between the preset target thickness, classification information, and the first preset threshold.

[0026] A second aspect of this application provides a detection device, which includes a detection module, a first determination module, and a calculation module. The detection module is used to detect a target slab at preset time intervals to obtain n thickness differences arranged sequentially. The n thickness differences correspond one-to-one with n detection points, and the n detection points are distributed sequentially and at intervals on the target slab along the direction from the beginning to the end of the strip. The first determination module is used to determine the detection point P corresponding to the (i+m)th thickness difference when all thickness differences from the i-th to the (i+m)-th thickness difference are less than or equal to a first preset threshold. i+m The first distance to the head is determined, and the second distance from the detection point corresponding to the i-th thickness difference to the detection point corresponding to the (i+m)-th thickness difference is determined. The calculation module is used to calculate the out-of-tolerance length of the slab based on the first distance and the second distance.

[0027] A third aspect of this application provides a detection device, including a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, it implements the slab deviation length detection method of any one of the first aspects mentioned above.

[0028] The fourth aspect of this application provides a readable storage medium storing a computer program or instructions, which, when executed by a processor, implements the slab length deviation detection method of any one of the first aspects mentioned above.

[0029] In the slab length deviation detection method provided in this application, since the thickness deviation may occur at the beginning of the slab, the target slab is detected at preset time intervals along the direction from the beginning to the end of the strip, resulting in n thickness difference values ​​arranged sequentially. By using m+1 consecutive detection points less than or equal to a first preset threshold, it is determined that the area of ​​the slab within and after the m+1 consecutive detection points meets the thickness deviation standard. The area before the m+1 consecutive detection points is the slab deviation area. Then, the detection point P corresponding to the (i+m)th thickness difference value is used... i+m The out-of-tolerance length of the slab is calculated by the first distance to the head and the second distance from the detection point corresponding to the i-th thickness difference to the detection point corresponding to the (i+m)-th thickness difference. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a flowchart illustrating a method for detecting the out-of-tolerance length of a slab according to a first aspect embodiment of this application;

[0032] Figure 2 This is a partial flowchart illustrating a billet deviation length detection method according to a first aspect embodiment of this application;

[0033] Figure 3 This is a flowchart illustrating another method for detecting the out-of-tolerance length of a slab according to the first aspect of this application;

[0034] Figure 4 This is a schematic diagram of the structure of a detection device according to a second aspect embodiment of this application;

[0035] Figure 5 This is a schematic diagram of the structure of a testing device according to a third aspect of this application. Detailed Implementation

[0036] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended only to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples. In the drawings and the following description, at least some well-known structures and technologies are not shown in order to avoid causing unnecessary ambiguity to this application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0037] It should be noted that, unless otherwise stated, "a plurality of" in this document means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0038] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this application. In the description of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. It should be understood that when describing the structure of a component, when a layer or region is referred to as being "above" or "on top of" another layer or region, it can mean that it is directly above another layer or region, or that other layers or regions are included between it and another layer or region. Furthermore, if the component is flipped, the layer or region will be located "below" or "under" another layer or region. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] The slab rolling process usually requires hot rolling followed by cold rolling. During hot rolling, it is difficult to precisely control the thickness of the slab head, resulting in uneven thickness of the cold-rolled raw material head. The thickness of the cold-rolled slab head may exceed the tolerance, and the length of the excess thickness varies from slab to slab, making it difficult to measure. Subsequent processes are very difficult to handle because the excess length of the slab cannot be accurately obtained, which can easily lead to product quality problems and quality disputes.

[0040] To address the aforementioned problems, embodiments of this application provide a method, device, equipment, and readable storage medium for detecting the out-of-tolerance length of a slab, capable of detecting the out-of-tolerance length of the slab. The embodiments provided in this application will be described below with reference to the accompanying drawings.

[0041] Please refer to Figure 1 The first aspect of this application provides a method for detecting the out-of-tolerance length of a slab, comprising:

[0042] S1. The target slab is detected at preset intervals to obtain n thickness differences arranged in time sequence. The n thickness differences correspond one-to-one with n detection points. The n detection points are distributed on the target slab in a sequential and spaced manner from the beginning to the end of the strip.

[0043] S2. If all thickness differences from the i-th thickness difference to the (i+m)-th thickness difference are less than or equal to the first preset threshold, determine the detection point P corresponding to the (i+m)-th thickness difference. i+m The first distance to the leader is used to determine the second distance from the detection point corresponding to the i-th thickness difference to the detection point corresponding to the (i+m)-th thickness difference.

[0044] S3. Calculate the out-of-tolerance length of the slab based on the first distance and the second distance, where n, m, and i are positive integers, and i+m≤n.

[0045] The target slab is inspected during the rolling process. The target slab moves relative to the rolling mill at a certain speed. A thickness detection device can be installed at the mill exit to detect the thickness of the target slab, obtaining n thickness differences arranged sequentially. For example, the target slab's moving speed relative to the rolling mill is 120 m / min, and the preset duration is 20 ms, meaning the distance between two adjacent detection points is 0.04 m. The thickness difference is determined when all thickness differences from the i-th to the (i+m)-th are less than or equal to a first preset threshold, i.e., for m+1 consecutive detection points P... i P i+1 P i+2 ...P i+m-2 P i+m-1 P i+m The thickness difference is less than or equal to the first preset threshold, which is the thickness difference standard. This standard can be determined by process engineers based on the specifications, model, and customer requirements of the target slab. It should be understood that, assuming the slab's relative speed to the rolling mill remains constant, the second distance is the product of the slab's relative speed to the rolling mill and *m* preset time intervals. If the thickness difference is less than or equal to the first preset threshold, the slab thickness meets the thickness difference standard; if the thickness difference exceeds the first preset threshold, it is considered out of tolerance. The out-of-tolerance length is the difference between the first distance and the second distance.

[0046] After calculating the out-of-tolerance length, the slab out-of-tolerance length detection method further includes storing and outputting the target slab's out-of-tolerance length to the control module of the next process. Optionally, when the tail of the target slab reaches the entrance of the rolling mill, the first distance and the second distance are stored, and the out-of-tolerance length is calculated; when the tail of the target slab reaches the exit of the rolling mill, the out-of-tolerance length is output. After the tail of the target slab reaches the exit of the rolling mill, the out-of-tolerance length is stored for a certain period of time, and then initialized to prevent affecting the detection data of the next slab. Optionally, the out-of-tolerance length of the target slab is initialized 5 seconds after the tail of the target slab reaches the exit of the rolling mill.

[0047] The slab length deviation detection method of this application embodiment addresses the issue of thickness deviation at the strip head of the slab. Therefore, along the strip head to strip tail direction, the target slab is detected at preset time intervals to obtain n thickness difference values ​​arranged sequentially. By using m+1 consecutive detection points less than or equal to a first preset threshold, it is determined that the area of ​​the slab within and after the m+1 consecutive detection points meets the thickness deviation standard. The area before the m+1 consecutive detection points is considered the slab deviation area. Then, the detection point P corresponding to the (i+m)th thickness difference value is used to determine the deviation. i+m The out-of-tolerance length of the slab is calculated by the first distance to the head and the second distance from the detection point corresponding to the i-th thickness difference to the detection point corresponding to the (i+m)-th thickness difference.

[0048] In some alternative embodiments, S2 includes:

[0049] S201, Obtain historical count values;

[0050] S202. When the historical count value is equal to the second preset threshold, determine the first distance from the detection point Pi+m corresponding to the (i+m)th thickness difference to the head, and determine the second distance from the detection point corresponding to the ith thickness difference to the detection point corresponding to the (i+m)th thickness difference.

[0051] The historical count value is the cumulative value of the number of first thickness differences, and the first thickness difference is the thickness difference that continuously satisfies being less than or equal to a first preset threshold.

[0052] For example, if the thickness difference between three detection points P0, P1, and P2 is less than or equal to the first preset threshold, then the thickness difference between these three detection points is the first thickness difference, and the historical count value is 3. Among the three detection points P6, P7, and P8, the thickness difference at P6 is less than or equal to the first preset threshold, the thickness difference at P7 is greater than the first preset threshold, and the thickness difference at P8 is less than or equal to the first preset threshold. Therefore, the thickness differences between P6, P7, and P8 are not consecutively less than or equal to the first preset threshold and do not belong to the first thickness difference. When the historical count value reaches the second preset threshold, the first distance and the second distance are determined. It should be understood that the second preset threshold is m+1. Optionally, the second preset threshold is 500, meaning that if the thickness difference between 500 consecutive detection points is less than or equal to the first preset threshold, then the area of ​​the slab located at and after these 500 consecutive detection points meets the thickness difference standard, and the area before these 500 detection points is an out-of-tolerance area.

[0053] In some alternative embodiments, after S1, the following is also included:

[0054] S4. Obtain historical count values;

[0055] S5. For thickness differences arranged in time sequence, if the thickness difference is less than or equal to the first preset threshold, increment the historical count value by one; for thickness differences arranged in time sequence, if the thickness difference is greater than the first preset threshold, update the historical count value to the preset initial value.

[0056] For example, the initial preset value of the historical count is 0. If the thickness difference at the six detection points P0, P1, P2, P3, P4, and P5 is less than or equal to a first preset threshold, the historical count is 6. If the thickness difference at the seventh detection point P6 is still less than or equal to the first preset threshold, the historical count is incremented by one, becoming 7. If the thickness difference at the seventh detection point P6 is greater than the first preset threshold, the historical count is updated to the initial preset value of 0. This process continues until the historical count equals a second preset threshold, at which point P is determined to correspond to the (i+m)th thickness difference. i+m The first distance to the head, and the second distance from the detection point corresponding to the i-th thickness difference to the detection point corresponding to the (i+m)-th thickness difference.

[0057] Optionally, if the historical count value is equal to the second preset threshold, the historical count value continues to accumulate after determining the first distance and the second distance.

[0058] In some alternative embodiments, in S1, detecting the target slab includes detecting the target slab at the exit of the rolling mill, and the method further includes:

[0059] S6. Obtain the third distance from the tail of the target slab to the exit of the rolling mill equipment;

[0060] S7. If the third distance is greater than or equal to the second preset threshold, update the historical count value to the preset initial value.

[0061] In these alternative embodiments, the strip tail of the target slab needs to be sheared when it reaches the exit of the rolling mill to continue rolling the next slab. Therefore, the historical count value needs to be updated to a preset initial value before the strip tail of the target slab reaches the exit of the rolling mill equipment to prevent the detection data of the target slab from affecting the detection of the next slab.

[0062] In some alternative embodiments, the rolling mill equipment includes multiple stands arranged sequentially along the movement path of the slab, the multiple stands including adjacent first stands and second stands, the target slab passes through the first stands and the second stands sequentially, and the second preset threshold is the distance from the entrance of the first stand to the exit of the second stand.

[0063] In these alternative embodiments, the historical count value is updated to a preset initial value before or when the target slab reaches the second rack, in order to prevent the detection data of the target slab from affecting the detection of the next slab.

[0064] Please refer to Figure 2 In some optional embodiments, S1 includes:

[0065] S101. Detect the target slab at preset time intervals to obtain n thickness values ​​arranged in time sequence;

[0066] S102. Calculate n thickness differences arranged in time sequence based on n thickness values ​​and the preset target thickness.

[0067] The target slab thickness can be measured by a thickness detection device, such as a thickness gauge, located at the exit of the rolling mill. The preset target thickness is the target processing thickness of the target slab or the slab thickness required by the customer, which is the thickness the target slab should achieve after rolling by the rolling mill. The thickness difference is the absolute value of the difference between the target slab thickness and the preset target thickness.

[0068] Please refer to Figure 3 In some alternative embodiments, prior to S1, the method further includes:

[0069] S8. Obtain the classification information and preset target thickness of the target slab;

[0070] S9. Determine the first preset threshold corresponding to the target slab according to the preset mapping relationship. The preset mapping relationship includes the mapping relationship between the preset target thickness, classification information, and the first preset threshold.

[0071] The target slab classification information and preset target thickness can be directly input and stored in the system by on-site process personnel, and can be directly accessed. The classification information can be classification codes, which are assigned by process personnel based on the slab type, grade, customer requirements for thickness variation, etc. Each classification code can correspond to one type of slab or multiple types of slabs. The preset mapping relationship and the first preset threshold are compiled by process personnel and stored in the system in advance. A determined preset target thickness and first classification information correspond to a determined first preset threshold.

[0072] For example, when the classification code is 6, the corresponding steel grade is LGDG, and the corresponding first preset threshold is 25um; when the classification code is 1 or 2, the corresponding steel grade is LGKD, and the corresponding first preset threshold is 35um; when the classification code is 7, the corresponding steel grade is LWB, and the corresponding first preset threshold is 15um; when the classification code is 4, the corresponding steel grade is LGHG, and the corresponding first preset threshold is 15um.

[0073] Please refer to Figure 4 The second aspect of this application provides a detection device 10, which includes a detection module 1, a first determination module 2, and a calculation module 3. The detection module 1 is used to detect a target slab at preset time intervals to obtain n thickness differences arranged sequentially. The n thickness differences correspond one-to-one with n detection points, and the n detection points are distributed sequentially and at intervals on the target slab from the beginning to the end of the strip. The first determination module 2 is used to determine the detection point P corresponding to the (i+m)th thickness difference when all thickness differences from the i-th to the (i+m)-th thickness difference are less than or equal to a first preset threshold. i+m The first distance to the head is determined, and the second distance is determined from the detection point corresponding to the i-th thickness difference to the detection point corresponding to the (i+m)-th thickness difference. The calculation module 3 is used to calculate the out-of-tolerance length of the slab based on the first and second distances. Optionally, the detection module 1, the first determination module 2, and the calculation module 3 are electrically connected.

[0074] In some optional embodiments, the detection device 10 further includes an acquisition module and a second determination module. The acquisition module is used to acquire the classification information and preset target thickness of the target slab. The second determination module is used to determine a first preset threshold corresponding to the target slab according to a preset mapping relationship. The preset mapping relationship includes the mapping relationship between the preset target thickness, the classification information, and the first preset threshold.

[0075] The detection device in the embodiments of this application can be an integrated circuit or a chip, or it can be a device with an operating system. The detection device provided in the embodiments of this application can implement the various processes of the method embodiments of the first aspect of this application, and will not be described again here to avoid repetition.

[0076] Please refer to Figure 5 The third aspect of this application provides a detection device, including a processor 301 and a memory 302 storing computer program instructions; when the processor 301 executes the computer program instructions, it implements the slab deviation length detection method of any one of the first aspects of the above-mentioned embodiments.

[0077] For example, the program can be divided into one or more modules / units, one or more of which are stored in memory 302 and executed by processor 301 to complete this application. The one or more modules / units can be a series of program instruction segments capable of performing a specific function, which describe the execution process of the program in the device.

[0078] Specifically, the processor 301 may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0079] Memory 302 may include mass storage for data or instructions. For example, and not limitingly, memory 302 may include a hard disk drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 302 may include removable or non-removable (or fixed) media. Where appropriate, memory 302 may be internal or external to the integrated gateway disaster recovery device. In a particular embodiment, memory 302 is non-volatile solid-state memory.

[0080] Memory 302 may include read-only memory (ROM), random access memory (RAM), disk storage media device, optical storage media device, flash memory device, electrical, optical, or other physical / tangible memory storage device. Therefore, typically, memory 302 includes one or more tangible (non-transitory) readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to one aspect of this disclosure.

[0081] The processor 301 reads and executes the program instructions stored in the memory 302 to implement any of the slab thickness difference determination methods in the first aspect embodiment described above.

[0082] In one example, the device may also include a communication interface 303 and a bus 310. The processor 301, memory 302, and communication interface 303 are connected via the bus 310 and communicate with each other.

[0083] The communication interface 303 is mainly used to realize communication between various modules, devices, units and / or equipment in the embodiments of this application.

[0084] Bus 310 includes hardware, software, or both, that couples components of an online data traffic metering device together. For example, and not limitingly, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 310 may include one or more buses. Although specific buses are described and illustrated in embodiments of this application, any suitable bus or interconnect is contemplated herein.

[0085] Furthermore, in conjunction with the methods in the above embodiments, this application embodiment can provide a readable storage medium for implementation. This readable storage medium stores computer program instructions; when executed by a processor, these computer program instructions implement any of the methods in the above embodiments.

[0086] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.

[0087] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. Programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0088] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0089] The aspects of this disclosure have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by special-purpose hardware performing the specified functions or actions, or can be implemented by a combination of special-purpose hardware and computer instructions.

[0090] The embodiments described above are not exhaustive, nor do they limit the invention to specific embodiments. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, enabling those skilled in the art to effectively utilize this application and its modifications. It should be understood that the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and all such modifications or substitutions should be included within the scope of protection of this application.

Claims

1. A method for detecting out-of-tolerance length of slabs, characterized in that, include: The target slab is tested at preset intervals to obtain n thickness differences arranged in time sequence. The n thickness differences correspond one-to-one with n detection points. The n detection points are distributed on the target slab at intervals along the direction from the beginning to the end of the strip. If all thickness differences from the i-th to the (i+m)-th thickness differences are less than or equal to a first preset threshold, then the detection point P corresponding to the (i+m)-th thickness difference is determined. i+m The first distance to the head is used to determine the second distance from the detection point corresponding to the i-th thickness difference to the detection point corresponding to the (i+m)-th thickness difference; The deviation length of the slab is calculated based on the first distance and the second distance, where n, m, and i are positive integers, and i+m≤n.

2. The method according to claim 1, characterized in that, When all thickness differences from the i-th to the (i+m)-th thickness differences are less than or equal to a first preset threshold, a detection point P corresponding to the (i+m)-th thickness difference is determined. i+m Determining the first distance to the head, and determining the second distance from the detection point corresponding to the i-th thickness difference to the detection point corresponding to the (i+m)-th thickness difference, includes: Get historical count values; If the historical count value is equal to the second preset threshold, determine the detection point P corresponding to the (i+m)th thickness difference value. i+m The first distance to the head is used to determine the second distance from the detection point corresponding to the i-th thickness difference to the detection point corresponding to the (i+m)-th thickness difference; The historical count value is the cumulative value of the number of first thickness differences, and the first thickness difference is the thickness difference that continuously satisfies being less than or equal to the first preset threshold.

3. The method according to claim 2, characterized in that, After detecting the target slab at preset time intervals and obtaining n thickness differences arranged in time sequence, the process includes: Get historical count values; For the thickness differences arranged chronologically, if the thickness difference is less than or equal to the first preset threshold, the historical count value is incremented by one; For the thickness differences arranged chronologically, if the thickness difference is greater than the first preset threshold, the historical count value is updated to a preset initial value.

4. The method according to claim 3, characterized in that, The method for detecting the target slab includes detecting the target slab at the exit of the rolling mill equipment. Obtain the third distance from the tail of the target slab to the exit of the rolling mill equipment; If the third distance is greater than or equal to the second preset threshold, the historical count value is updated to the preset initial value.

5. The method according to claim 4, characterized in that, The rolling mill equipment includes multiple stands arranged sequentially along the movement path of the slab. The multiple stands include adjacent first stands and second stands. The target slab passes through the first stands and the second stands sequentially. The second preset threshold is the distance from the entrance of the first stand to the exit of the second stand.

6. The method according to claim 1, characterized in that, The target slab is detected at preset time intervals to obtain n thickness differences arranged sequentially along time, including: The target slab is detected at preset time intervals to obtain n thickness values ​​arranged in time sequence; Based on the n thickness values ​​and the preset target thickness, n thickness differences are calculated and arranged in time sequence.

7. The method according to claim 6, characterized in that, Before detecting the target slab at preset time intervals to obtain n thickness differences arranged sequentially, the method further includes: Obtain the classification information and preset target thickness of the target slab; A first preset threshold corresponding to the target slab is determined according to a preset mapping relationship, wherein the preset mapping relationship includes the mapping relationship between the preset target thickness, the classification information, and the first preset threshold.

8. A detection device, characterized in that, include: The detection module is used to detect the target slab at preset time intervals to obtain n thickness differences arranged in time sequence. The n thickness differences correspond one-to-one with n detection points, and the n detection points are distributed on the target slab at intervals along the direction from the beginning to the end of the strip. The first determining module is configured to determine the detection point P corresponding to the (i+m)th thickness difference when all thickness differences from the i-th to the (i+m)-th thickness difference are less than or equal to a first preset threshold. i+m The first distance to the head is used to determine the second distance from the detection point corresponding to the i-th thickness difference to the detection point corresponding to the (i+m)-th thickness difference; The calculation module is used to calculate the out-of-tolerance length of the slab based on the first distance and the second distance.

9. A testing device, characterized in that, include: Processor and memory storing computer program instructions; When the processor executes the computer program instructions, it implements the slab length deviation detection method as described in any one of claims 1 to 7.

10. A readable storage medium, characterized in that, The readable storage medium stores a computer program or instructions that, when executed by a processor, implement the slab length deviation detection method as described in any one of claims 1 to 7.

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