Optimization method for returning thickness data to account sub-volume

Abstract

The invention relates to an optimization method for a thickness data account-returning sub-volume. The method comprises the following steps: step 1, obtaining a thickness measured value from a basic automation system and increasing the acquisition of an acquisition point offset at the same time; 2, identifying the length (namely the length of an inner ring and the length of an outer ring) of a front coil and a rear coil contained in the weld seam coil, and realizing the user-returning optimization of the length data of the rear coil in the corresponding hot coil length data; and step 3, combining the length of the sub-roll and the offset to match an exit roll number.

Description

Technical Field

[0001] The present invention relates to an optimization method, specifically to an optimization method for thickness data householding sub-rolls, and belongs to the field of automatic control of pickling lines. Background Art

[0002] The pickling high-strength steel production line of Meigang is a continuous production line. Correctly classifying the thickness gauge sampling data under the output roll is what we call thickness data householding. Due to limited on-site space in the pickling production line of Meigang, the thickness gauge is installed 34.6 meters before the exit flying shear to measure the product thickness value. The measurement interval is 300 mm, the typical sampling time is 10 ms, and the thickness data is sent to the process control system according to the 1-second sampling average value. The original thickness data householding method is as follows: when the exit flying shear performs shearing, the output rolls are classified into two cases: finished product rolls and welded seam rolls. In different cases, the thickness gauge data in the fixed physical length area of 34.6 meters is identified and marked, and finally, the roll number is matched to each high-frequency thickness data record according to the matching principle. However, the thickness data in this fixed distance is eliminated by back-calculating the physical length of the strip steel through speed. This speed is the exit speed collected by the production line at a 5-second interval. Since the collection frequencies of the exit speed and the thickness are different, there is an error in the speed, and adding the error of the back-calculated length results in a not very high accuracy of householding the strip steel head and tail thickness data to the sub-roll.

[0003] After novelty search, the invention patent "A Method and Device for Extracting Banknote Thickness Data" (CN201610937828.9) provides a method for extracting banknote thickness data, which is characterized by including: obtaining the image data and original thickness data of the banknote to be detected, and determining the mapping relationship between the image data and the original thickness data, where the mapping relationship represents the ratio of the number of data sampling points of the image sensor and the thickness sensor within a unit distance; using the mapping relationship and the image data to obtain the channel number corresponding to the banknote to be detected in the original thickness data and the start and end row numbers of the banknote to be detected in each channel number; and extracting the thickness data of the banknote to be detected from the original thickness data according to the start and end row numbers. The invention patent "Thickness Data Filtering Method, System, Device and Computer Readable Storage Medium" (CN201810229038.4), applicable to the field of data processing technology, provides a thickness data filtering method, system, device and computer readable storage medium. The technology involved in this patent is completely different from the above patents. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention provides an optimization method for thickness data attribution to sub-rolls. In the existing pickling line production line, while the basic automation system sends thickness sampling data, it records the offset of each sampling point on the master roll (i.e., the distance of the sampling point from the leading weld), and sends it to the process control system together at a sampling frequency of 1 second. The process control system realizes the attribution of thickness data to sub-rolls by identifying the lengths of the forward roll (inner circle) and the backward roll (outer circle) included in the welded coil, as well as the shearing length of the sub-roll, and combining the offset data. This method no longer considers the influence of a fixed distance on data attribution. Since the thickness sampling and offset sampling frequencies are the same, the coincidence degree between the head and tail data of the steel coil and the physical object is effectively improved.

[0005] To achieve the above object, the technical solution of the present invention is as follows. An improved method for thickness data attribution to sub-rolls, the method comprising the following steps:

[0006] Step 1: While obtaining the measured thickness value from the basic automation system, obtain the offset of the acquisition point.

[0007] Step 2: Identify the lengths of the forward roll and the backward roll included in the welded coil (i.e., the lengths of the inner circle and the outer circle, see Figure 1 ), and optimize the attribution of the backward roll length data in the corresponding hot coil length data.

[0008] Step 3: Match the outgoing coil number by combining the sub-roll length and the offset.

[0009] Among them, in step 1: Obtain and record the offset from the basic automation system, specifically as follows:

[0010] The basic automation system sends a high-frequency thickness measurement sampling frequency of 1 s to the L2 process control system by means of a timed telegram. A sampling telegram is sent every 10 seconds, and the telegram contains 10 groups of sampling data. Each group includes the measured thickness value at the center, the measured thickness value on the drive side, the measured thickness value on the operator side, the position of the measured value, and the internal ID of the measured thickness value. Among them, the position of the measured value is the offset of each sampling point on the master roll, that is, the distance of the sampling point from the leading weld. The high-frequency thickness measurement sampling telegram is sent to the process control system together at a sampling frequency of 1 second. The process control system stores the data in the corresponding data table in the database. Before the data is attributed to the sub-roll, the outgoing coil number (EXCOILID) in the table is a null value. The example data is as follows:

[0011]

[0012] Among them, in step 2: Identify the welded coil and determine the attribution of the backward roll length data it contains. Specifically as follows:

[0013] When the transverse cutting is performed, if the produced coil is a welded coil, the basic automation gives two different ID numbers through the cutting message, as well as the measured length of the subsequent coil (i.e., the length from the weld to the transverse cutting position). One of the two ID numbers is the "main ID number" and the other is the "next coil ID number", and the physical positions of these two IDs are described, but there is no fixed corresponding relationship between the physical positions of the preceding strip and the subsequent strip and the "main ID number" and the "next coil ID number".

[0014] Discuss in 2 cases:

[0015] Case 1: When the subsequent coil is the "main ID number", this welded coil is Package 01. The data corresponding to the inner circle length belongs to the mother coil of the preceding coil, and the data corresponding to the outer circle length is attributed to the current welded sub-coil;

[0016] Case 2: When the current coil is the "main ID number", this welded coil is the end package, that is, the last sub-coil. The data corresponding to the outer circle length should be attributed to the "next coil" mother coil, and this part of the data is no longer attributed to the next sub-coil.

[0017] Among them, Step 3: Match the outlet coil number in combination with the sub-coil length and offset. Specifically as follows:

[0018] After determining the attribution of the subsequent coil length data, match the outlet coil number in combination with the sub-coil length and offset to determine the attributed data.

[0019] The first step is to obtain the length of the subsequent coil included in the welded coil (i.e., the outer circle length). This data is read from the first cutting message. Retrieve the thickness high-frequency data with the corresponding hot coil number and sort it in ascending order according to the serial number to obtain data such as the thickness data and its corresponding serial number (seqno) and offset (thickpos);

[0020] The second step is to attribute the thickness data of the welded coil according to the length of the subsequent coil.

[0021] When the subsequent coil is the "main ID number", the offset > L Ou (outer circle length) data is attributed to Package 01 of the welded coil;

[0022] When the current coil is the "main ID number", the offset < L Ou (outer circle length) data is attributed to the "next coil" mother coil and is no longer attributed to the sub-coil;

[0023] The third step is to attribute the thickness data of the finished coil. After obtaining the length L Pd of the finished coil, the offset <= (L Pd + L Ou ) and the data with an empty outlet coil number is attributed to the "next coil" mother coil.

[0024] Compared with the prior art, the present invention has the following advantages: recording the offset of each sampling point on the master coil, identifying the lengths of the forward coil (inner circle) and the backward coil (outer circle) included in the welded coil, as well as the shearing length of the sub-coil. At the same time, combining the offset data, it realizes the optimization of the method for attributing thickness data to sub-coils, improves the accuracy of attributing thickness data to sub-coils, controls the attribution error within 1%, and facilitates the subsequent repair of steel coils. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 : Structural diagram of the high-frequency thickness measurement sampling telegram of the present invention.

[0026] In the figure: 1. Outer circle, 2. Inner circle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To deepen the understanding of the present invention, the following detailed description is made in conjunction with the accompanying drawings for this embodiment.

[0028] Figure 1 is the structural diagram of the high-frequency thickness measurement sampling telegram of the present invention. The telegram content includes the central measured thickness value, the drive-side measured thickness value, the operator-side measured thickness value, the measured thickness position, and the internal ID of the measured thickness;

[0029] Thickness data storage table of the present invention (10 data), writing to the table once every 10 seconds, writing 10 groups of data at a time, writing the content in the acquisition telegram into the data storage table. Before attributing the data to the sub-coil, the export coil number (EXCOILID) in the table is a null value;

[0030] Figure 1 The inner circle and the outer circle can be seen. The welded coil has a weld, which is composed of the tail of the forward coil and the head of the backward coil. The tail of the forward coil is wound first, called the inner circle, and the head of the backward coil is wound subsequently, called the outer circle;

[0031] The present invention has been applied in the process control of the 1420 cold rolling pickling unit of Meishan Steel, and can also be applied to other types of processing lines with requirements for coil number attribution.

[0034] Specific implementation:

[0035] The output coils of the 1420 cold rolling pickling line of Meishan Steel are divided into two types: finished coils and welded coils. Among them, the finished coils have no welds and correspond to one inlet coil number; while the welded coils have welds and are composed of the tail of the forward coil and the head of the backward coil, corresponding to two inlet coil numbers.

[0036] Example 1: The backward coil is the "main ID number"

[0037] Before the steel coil is sheared, the actual measured thickness value and offset are obtained from the basic automation system. The thickness data collected by the thickness gauge and not matched with the export coil number corresponds to two inlet coil numbers, 29609602200 and 29616101100. Among them, 29616101100 is the forward coil number, and 29609602200 is the rearward coil number. Some of the data are shown in the following table:

[0038]

[0039]

[0040] After the steel coil is sheared, the inlet coil number corresponding to the "main ID" given by the basic automation system is 29609602200, and the inlet coil number corresponding to the next coil ID is 29616101100. The weld coil 33105960601 is produced. The data corresponding to the inner circle length should belong to the mother coil of the forward coil, and the data corresponding to the outdoor circle length should be attributed to the current weld sub-coil.

[0041] First step, obtain the length of the rearward coil included in the weld coil (i.e., the outer circle length). The total length of the weld coil 33105960601 is 63 meters, and the outer circle length is 47 meters. Retrieve the high-frequency thickness data with the inlet coil number 29609602200 corresponding to the main ID, and sort it in ascending order according to the serial number to obtain the thickness data and its corresponding serial number, offset and other data; the example data after sorting in ascending order is as follows:

[0042]

[0043] Second step, implement the household registration of the thickness data of the weld coil according to the length of the rearward coil. The rearward coil 29609602200 is the "main ID number", and the data with the offset <= L Ou (outer circle length) is attributed to Package 01 of the weld coil, and the export coil number 33105960601 is matched; since the offset corresponding to the record with serial number 32 is 47, the records with serial numbers 1-32 are matched with the export coil number 33105960601.

[0044]

[0045] Third step, implement the household registration of the thickness data of the finished coil. Obtain the length L Pd = 401 meters of the first finished coil after the weld coil, L Pd + L Ou = 401 + 47 = 448. The data with the offset <= 448 and the export coil number empty is attributed to 30104697802. Enter the next round of household registration processing.

[0046]

[0047] Example 2: The forward coil is the "main ID number"

[0048] Before the steel coil is sheared, the measured thickness value and offset are obtained from the basic automation system. The thickness data collected by the thickness gauge and not matched with the outlet coil number corresponds to two inlet coil numbers, 14903002200 and 14903002100. Among them, 14903002200 is the forward coil number and 14903002100 is the backward coil number. Part of the data is shown in the following table:

[0049]

[0050]

[0051] After the steel coil is sheared, the inlet coil number corresponding to the "main ID" given by the basic automation system is 14903002200, and the inlet coil number corresponding to the next coil ID is 14903002100. The welded seam coil 33105958403 is produced. The data corresponding to the outer ring length should be attributed to the "next coil" master coil and no longer attributed to the next sub-coil.

[0052] First step, obtain the length of the backward coil included in the welded seam coil (i.e., the outer ring length). The total length of the welded seam coil 33105958403 is 44 meters, and the outer ring length is 25 meters. Retrieve the high-frequency thickness data with the inlet coil number 14903002200 corresponding to the main ID, and sort it in ascending order according to the serial number to obtain the thickness data and its corresponding serial number, offset and other data. The example data after sorting in ascending order is as follows:

[0053]

[0054] Second step, realize the attribution of the thickness data of the welded seam coil according to the length of the backward coil. The backward coil 14903002100 is the "main ID number", and the offset <L Ou (The data of the outer ring length) is attributed to the "next coil" master coil and no longer attributed to the sub-coil; because the offset corresponding to the record with serial number 21 is 25, the records with serial numbers 1-21 are matched with the hot coil number 14903002100.

[0055]

[0056]

[0057] Third step, attribute the thickness data of the finished coil. Obtain the length L of the first finished coil after the welded seam coil Pd = 571 meters, L Pd +

[0058] L Ou = 571 + 25 = 596. The data with offset <= 596 and empty outlet coil number is attributed to 33105958501 for the next round of attribution processing.

[0059]

[0060] It should be noted that the above embodiments are not used to limit the protection scope of the present invention, and equivalent transformations or substitutions made on the basis of the above technical solutions all fall within the protection scope of the claims of the present invention.

Claims

1. An optimization method for thickness data householding sub - coils, characterized in that, the method comprises the following steps: Step 1: While obtaining the actual measured thickness value from the basic automation system, obtain the acquisition point offset; Step 2: Identify the lengths of the forward coil and the backward coil included in the welded coil (i.e., the lengths of the inner and outer circles), and implement the optimization of the backward coil length data householding in the corresponding hot coil length data; Step 3: Match the outlet coil number by combining the sub - coil length and the offset.

2. The optimization method for thickness data householding sub - coils according to claim 1, characterized in that, in Step 1: Obtain and record the offset from the basic automation system, specifically as follows: The basic automation system sends high - frequency thickness measurement sampling frequency of 1 s to the L2 process control system by means of a timed telegram, and sends a sampling telegram every 10 seconds. The telegram contains 10 groups of sampling data, each group including the center of the actual measured thickness value, the drive - side actual measured thickness value, the operator - side actual measured thickness value, the position of the actual measured value, and the internal ID of the actual measured thickness value. Among them, the position of the actual measured value is the offset of each sampling point on the master coil, that is, the distance of the sampling point from the leading - edge weld. The high - frequency thickness measurement sampling telegram is sent to the process control system at a sampling frequency of 1 second. The process control system stores the data in the corresponding data table of the database. Before the data is householded to the sub - coil, the outlet coil number (EXCOILID) in the table is a null value.

3. The optimization method for thickness data householding sub - coils according to claim 2, characterized in that, Step 2: Identify the welded coil and determine the attribution of the backward coil length data, specifically as follows: When the transverse shear is cutting, if the produced coil is a welded coil, the basic automation gives two different ID numbers and the measured length of the backward coil (i.e., the length from the weld to the transverse shear cutting position) through the cutting telegram. One of the two ID numbers is the "main ID number" and the other is the "next coil ID number", and the physical positions of these two IDs are explained. However, there is no fixed corresponding relationship between the physical positions of the forward strip and the backward strip and the "main ID number" and the "next coil ID number". Discuss in 2 cases: Case 1: When the backward coil is the "main ID number", this welded coil is Package 01. The data corresponding to the inner - circle length belongs to the forward - coil master coil, and the data corresponding to the householded outer - circle length goes to the current welded sub - coil; Case 2: When the forward coil is the "main ID number", this welded coil is the end package, that is, the last sub - coil. The data corresponding to the outer - circle length should be householded to the "next coil" master coil, and this part of the data is no longer householded to the next sub - coil.

4. The optimization method for thickness data householding sub - coils according to claim 3, characterized in that, Step 3: Match the outlet coil number by combining the sub - coil length and the offset, specifically as follows: After determining the attribution of the backward coil length data, combine the sub - coil length and the offset to match the outlet coil number and determine the householded data. First step, obtain the length of the backward coil included in the welded coil (i.e., the outer - circle length). This data is read from the first shear telegram, retrieve the high - frequency thickness data with the corresponding hot coil number, and sort it in ascending order according to the sequence number to obtain the thickness data and its corresponding sequence number (seqno) and offset (thickpos) data. Step 2: Realize the classification of the weld roll thickness data according to the length of the trailing roll. When the trailing coil is the "main ID number", offset > L Ou (Outer circumference length) data is assigned to the weld coil 01 package; When the current row volume is the "main ID number", the offset <L Ou (outer circumference length) data is attributed to the "next volume" master volume and is no longer attributed to the sub-volume; Step 3: Consolidate the thickness data of the finished coil and obtain the length L of the finished coil Pd After that, the offset < = (L Pd + L Ou ), and the data with an empty outlet coil number are consolidated into the "next coil" master coil

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