CN111752233A - Method for assigning production process data to length position of strip steel - Google Patents
Method for assigning production process data to length position of strip steel Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 153
- 239000010959 steel Substances 0.000 title claims abstract description 153
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 55
- 241000277275 Oncorhynchus mykiss Species 0.000 claims abstract description 15
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- 230000008054 signal transmission Effects 0.000 claims description 4
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- 238000005097 cold rolling Methods 0.000 abstract description 5
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- 238000001514 detection method Methods 0.000 abstract description 3
- 238000004886 process control Methods 0.000 abstract description 2
- 238000000137 annealing Methods 0.000 description 15
- 238000005096 rolling process Methods 0.000 description 8
- 238000005452 bending Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
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- 238000004364 calculation method Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010583 slow cooling Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000013000 roll bending Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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Abstract
A method for assigning production process data to the length position of strip steel belongs to the field of strip steel cold rolling production technology. The method comprises the steps of dividing a unit into a plurality of sections, wherein each section comprises a strip steel head and tail detector, a roller encoder and process equipment; the strip steel head and tail detection device is used for detecting the head and tail of the strip steel, the signals are sent to the roller encoder and the process equipment in real time, the real-time speed and time integral output by the encoder are used for calculating the travel distance of the strip steel in real time, the length of the strip steel between the process equipment and the strip head is calculated in real time by combining the length of the strip steel among the detection device, the encoder and the process equipment, and then the real-time process data generated by the process equipment is assigned to the corresponding length position of the strip steel. The real data in the strip steel production process and the strip steel length position are bound in a one-to-one correspondence mode, a large amount of real data information is given to the strip steel length position, and heredity and inheritance of data across units can be achieved. Can be widely used in the process control field of various processing and treatment processes of strip steel.
Description
Technical Field
The invention belongs to the field of cold rolling production processes of strip steel, and particularly relates to a method for assigning production process data to the length position of the strip steel.
Background
Digital manufacturing is one of the core technologies of smart manufacturing.
On one hand, in the micro-profit era, higher requirements are put forward on the production efficiency and the production cost of iron and steel enterprises; on the other hand, with the higher and higher requirements of customers on product quality, the control on the product quality in steel enterprises is more strict, accurate assignment of production process data in the length direction of strip steel is realized through digital lean manufacturing, the production process data are connected in series through the physical position of the strip steel, and then the data dispersed in each system can be hooked, and the hooking analysis and optimization of the data, the product quality, the energy consumption, the cost and the like are carried out, so that the premise and the basis of a data chemical plant are realized; on the other hand, downstream customers often require digital steel coil delivery, and can accurately describe information such as surface quality defects and performance of steel coils at any length position, so as to better guide use and increase the added value of products.
The steel manufacturing industry belongs to the traditional rough industry with great simplicity and blackness, and the typical flow manufacturing industry comprises iron making, steel making, continuous casting, hot rolling, cold rolling and the like.
With the rapid development of information technology and data processing technology, the digital value of the manufacturing process of the traditional flow manufacturing industry is remarkable. Taking cold rolling as an example, a thin steel coil is several kilometers in length, in the high-speed threading production process, a plurality of working procedures with different spatial positions are carried out on a strip steel, the technical data of each working procedure are independent, the time labels of equipment in each working procedure are not uniform, even if the strip steel with several kilometers in length is subjected to the same working procedure and in the threading production process, the fluctuation of technical parameters and equipment states also exists, the real-time parameters need to be subjected to space-time conversion and are corresponding to the physical positions of the strip steel, on the basis, the data transmission among cross-machine sets is realized, the hooking among the data of the whole-flow process can be established, and the collected data can be used for value.
In the process manufacturing industry, especially the production of hot rolled or cold rolled steel coils, such high-speed, continuous, multi-process and cross-unit process manufacturing industry, in order to realize the digitization of the whole process production process and establish the corresponding relation between the production process data and the product quality, firstly, the following needs to be solved: 1) the production process data in the unit corresponds to the length position of the strip steel; 2) and (4) data inheritance across the unit.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for assigning production process data to the length position of strip steel. The method divides a unit for continuous production into a plurality of sections according to procedures, and assigns real-time production data to the length position of strip steel correspondingly in each section by utilizing a signal of a strip head tracker and a tension roller encoder through integrating speed and time. The scheme binds the real data in the strip steel production process and the strip steel length position in a one-to-one correspondence manner, endows the strip steel length position with a large amount of real data information, and can realize the heredity and inheritance of data across units.
The technical scheme of the invention is as follows: the method for assigning the production process data to the length position of the strip steel is characterized by comprising the following steps:
1) dividing a continuously-produced unit into a plurality of sections according to working procedures, wherein each section at least comprises a strip steel head and tail detector, a roller encoder and a working procedure device,
1) detecting the head of the strip steel by using a strip steel head and tail detector, taking the head of the strip steel as a timing starting point 0, and sending the signal to a roller encoder and process equipment in real time;
2) calculating the strip steel stroke
3) When t is equal to t1+ (n-1) ×△ t (n is more than or equal to 1, and n is 2,3,4, 5), namely the strip steel stroke
At this time, the (n-1) th group of instantaneous data sets [ dim (n-1) -data1, dim (n-1) -data2, dim (n-1) -data3, dim (n-1) -d of the process equipment at this time are setata4.......]Assigning a position with a distance from the tape head of L (n-1);
where Δ t represents the time interval between the acquisition of a set of data; l (n-1) represents the length of the (n-1) th point from the tape head; [ dim (n-1) -data1] represents the (n-1) th data size corresponding to the data item data1, [ dim (n-1) -data2] represents the (n-1) th data size corresponding to the data item data2, and so on;
4) when the strip steel head and tail detector detects the tail of the strip steel, the signal is sent to a roller encoder and process equipment in real time, and the time t is assumed to be t1+ △ T, the strip steel stroke is
The nth set of transient data sets [ dim (n) -data1, dim (n) -data2, dim (n) -data3, dim (n) -data4.]Assigning a position with the distance L ═ L (n) to the tape head, and calculating the total length of the steel coil by using the encoder 2 to be L (n) + D0+ D1;
in the formula, Δ T represents a time interval from the arrival of the strip head at the process equipment to the arrival of the strip tail at the process equipment; l (n) represents the length of the (n) th point from the tape head; [ dim (n) -data1] represents the nth data size corresponding to the data item data1, [ dim (n) -data2] represents the nth data size corresponding to the data item data2, and so on;
5) when t is equal to t1+ △ T + k ×△ T (k is more than or equal to 1, k is 1,2,3,4, 5), namely the strip steel stroke
Then, the n + k-th group of instantaneous data sets [ dim (n + k) -data1, dim (n + k) -data2, dim (n + k) -data3, and dim (n + k) -data4.]Assigning a position with a distance from the tape head of L (n + k);
wherein L (n + k) represents the length of the (n + k) th point from the tape head; [ dim (n + k) -data1] represents the (n + k) th data size corresponding to the data item data1, [ dim (n + k) -data2] represents the n + k th data size corresponding to the data item data2, and so on;
6) when | L (n + k) -L (n) -D0-D1|≤Vt×△ t, namely the tail part of the strip steel is about to arrive at the process equipment, K stops counting, and the data of the complete production process of the process equipment
Wherein, the time interval between two adjacent points is delta t, namely, a group of data is collected every delta t seconds;
Vt×△ t represents the data acquisition density, i.e., the separation distance between two adjacent points.
Specifically, the step of calculating the strip steel stroke comprises the following steps:
real-time speed V of unit from encodertIntegral with time t, i.e.
When the strip steel travels
When the strip head reaches D0+ D1, the strip head reaches the process equipment, and t is t1Calculating a starting point for the length of the strip steel;
in the formula, VtRepresenting a real-time speed; t represents the time of the tape head passing through the encoder; t is t1The time taken for the head of the strip steel to reach the process equipment from the head and tail detector is shown.
Wherein the process equipment comprises the process equipment and a control system thereof; the real-time signal transmission to the process equipment refers to the real-time signal transmission to the process equipment and the control system thereof.
Further, if the length of the strip steel changes when the strip steel passes through a certain process device in a certain section, the assignment method needs to be scaled according to the principle that the volume of the strip steel is not changed.
The scaling is performed according to the following method:
respectively calculating the metering lengths of the strip steel in the section 1 and the section 2 according to a strip steel head and tail detector and a roller encoder, wherein the metering lengths are respectively L and Length, L represents the strip steel Length at the inlet of the section 1, the Length represents the strip steel Length at the inlet of the section 2, if L is not equal to the Length, the strip steel Length is changed when the strip steel passes through the process equipment of the section, and the elongation ratio is
The assignment method of relevant data of the process equipment in the length direction of the strip steel is changed into the following steps:
The assignment method of the technical scheme of the invention establishes the one-to-one corresponding relation between the process data and the length and the position of the strip steel through the time-space conversion of the production process data, and lays a foundation for establishing a digital factory and exerting the potential application value of the data in the next step.
Compared with the prior art, the invention has the advantages that:
1. the technical scheme is that real-time production data are assigned to the length position of the strip steel by integrating speed and time by utilizing a signal of a strip head tracker and a tension roller encoder, real process data are bound with the length position of the strip steel, a large amount of real data information is given to the length position of the strip steel, and heredity and inheritance of data across units can be realized;
2. in the technical scheme, the length position of the strip steel is taken as a link, so that the one-to-one corresponding hooking relation of the full-process data can be established, and various correlation analyses can be conveniently carried out;
3. after the hooking relation is established, tracing and inquiring of abnormal reasons are facilitated;
4. after the technical scheme is adopted, the method can be used for delivering the user digital steel coil.
Drawings
FIG. 1 is a schematic illustration of two adjacent sections of a process train according to the present invention;
FIG. 2 is a schematic diagram of the relationship between the tape head length and the production process data in the present invention.
In the figure, 1 is a strip steel head and tail detector, 2 is a roller encoder, 3 is a previous process device, 4 is strip steel, 5 is a strip steel head and tail detector, 6 is a roller encoder, and 7 is a subsequent process device;
d0 is the strip length between the head and tail detectors and the roller encoders, D1 is the strip length between the roller encoders and the preceding process equipment 3, D3 is the strip length between the head and tail detectors and the roller encoders, and D4 is the strip length between the roller encoders and the subsequent process equipment 3.
L represents the length of the production process data from the tape head; l (lower case letters) represents production process data.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
In fig. 1, a continuous flow industrial manufacturing process is divided into a section 1 and a section 2.
In fig. 2, L represents the length of the production process data from the tape head; l (lower case letters) represents production process data.
The technical scheme of the invention is as follows:
in the process industry of strip steel production, the production process is divided into several sections. Taking fig. 1 as an example, a continuous flow industrial manufacturing process is divided into section 1 and section 2.
In the section 1, the hardware devices of the method for assigning the production process data to the length position of the strip steel comprise a strip steel head and tail detector 1, a roller encoder 2 and process equipment 3 (comprising various detection instruments), which are sequentially connected, but other equipment is allowed to exist among the hardware devices.
Specifically, the method for assigning the production process data to the physical position of the strip steel at least comprises the following steps:
1) the head of the strip steel is detected by a strip steel head and tail detector 1, and the head of the strip steel is used as a timing starting point 0 at the moment and is sent to a roller encoder 2 and a process device 3 in real time.
2) And (5) calculating the stroke of the strip steel. The strip steel stroke calculation method comprises the following steps: real-time speed V of unit from encoder 2tIntegral with time t, i.e.
When the strip steel travels
When the strip head reaches the process equipment 3, the strip head is explained, and t is t at the moment1The starting point is calculated for the strip steel length.
In the formula, VtRepresenting a real-time speed; t represents the time of the tape head passing through the encoder; t is t1The time taken for the strip head to reach the process equipment 3 from the head and tail detector 1 is shown.
3) When t is equal to t1+ (n-1) ×△ t (n is more than or equal to 1, n is 2,3,4,5.. eta.) (), namely the strip steel travel
At this point, the (n-1) th group of instantaneous data sets [ dim (n-1) -data1, dim (n-1) -data2, dim (n-1) -data3, dim (n-1) -data4.]The position is assigned a distance L (n-1) from the tape head.
Where Δ t represents the time interval between the acquisition of a set of data; l (n-1) represents the length of the (n-1) th point from the tape head; [ dim (n-1) -data1] represents the (n-1) th data size corresponding to the data item data1, [ dim (n-1) -data2] represents the (n-1) th data size corresponding to the data item data2, and so on.
4) When the strip steel head and tail detector 1 detects the tail of the strip steel, the signal is sent to the roller encoder 2 and the process equipment 3 in real time, and the elapsed time at the moment is assumed to be t ═ t1+ △ T, strip steel lineThe process is
The nth set of transient data sets [ dim (n) -data1, dim (n) -data2, dim (n) -data3, dim (n) -data4.]The position is assigned to the position with the distance L ═ L (n), and the total length of the steel coil calculated by the encoder 2 is L (n) + D0+ D1.
In the formula, Δ T represents a time interval from the arrival at the process equipment 3 of the strip head to the arrival at the process equipment 3 of the strip tail; l (n) represents the length of the (n) th point from the tape head; [ dim (n) -data1] represents the nth data size corresponding to the data item data1, [ dim (n) -data2] represents the nth data size corresponding to the data item data2, and so on.
5) When t is equal to t1+ △ T + k ×△ T (k is more than or equal to 1, k is 1,2,3,4, 5), namely the strip steel stroke
Then, the n + k-th group of instantaneous data sets [ dim (n + k) -data1, dim (n + k) -data2, dim (n + k) -data3, dim (n + k) -data4.]A position is assigned a distance L ═ L (n + k) from the tape head.
Wherein L (n + k) represents the length of the (n + k) th point from the tape head; [ dim (n + k) -data1] represents the (n + k) th data size corresponding to the data item data1, [ dim (n + k) -data2] represents the n + k th data size corresponding to the data item data2, and so on.
6) When | L (n + k) -L (n) -D0-D1| ≦ Vt×△t(Vt×△ t represents data acquisition density, i.e. the distance between two adjacent points), i.e. the tail of the strip steel is about to reach the process equipment 3, K stops counting, and the data of the complete production process of the process equipment 3 is obtained
It should be noted that: the calculation method is suitable for the condition that the length of the strip steel is not changed, and if the length of the strip steel is changed when the strip steel passes through equipment in a certain process in a certain section, the assignment method needs to be scaled in an equal proportion according to the principle that the volume of the strip steel is not changed.
The specific method for scaling is as follows:
as described above, according to the strip head and tail detector and the roller encoder, the measuring lengths of the strip in the section 1 and the section 2 (see FIG. 1) can be calculated respectively as L and Length, L represents the strip Length L at the inlet of the section 1, and Length represents the strip Length at the inlet of the section 2, if L is not equal to Length, the strip Length is changed when the strip passes through the section 1 process equipment 3, and the extension ratio is
The assignment method of the relevant data of the process equipment 3 in the length direction of the strip steel is changed into the following steps:
And similarly, the data of other working procedures in the section are sequentially assigned to the corresponding positions of the strip steel by adopting the same method.
Example (b):
for better understanding of the patent of the present invention, the contents of the present invention will be further illustrated with reference to the following examples, but the contents of the present invention are not limited to only the following examples.
Example 1:
an example of a leveler section of a cold-rolling hot-galvanizing unit is shown in fig. 1.
In section 2 of fig. 1, 5 denotes a seam tracker, 6 denotes a tension roller encoder, 7 denotes a leveler, 4 denotes a strip, and the strip advances from left to right. The leveler mainly functions to improve the plate shape and fine-tune the mechanical properties, and the longitudinal extension of the strip steel is very small and negligible.
By adopting the almost scheme of the invention, the real-time process data of the temper mill is assigned to the physical position of the strip steel, and the specific method comprises the following steps:
1) the weld (i.e. strip head) is detected by means of the weld tracker 5 and the signal is sent in real time to the tension roller encoder 6 and the levelling machine device 7.
2) And (5) calculating the stroke of the strip steel. Real-time real speed V of unit output by tension roller encoder 6tIntegral with time t, i.e.
When in use
When t is t1The weld arrives at the levelling machine 7, starting at this moment with a timing.
3) When t is equal to t1+ (n-1) ×△ t (n is more than or equal to 1, n is 2,3,4,5.. times) (△ t represents that a group of data is collected at △ t intervals), namely the travel of the strip steel
Then, the n-1 th group of instantaneous data of the leveler 7 at this moment [ dim (n-1) -rolling force, dim (n-1) -roll bending amount, dim (n-1) -tension, dim (n-1) -set speed]The position is assigned a distance L (n-1) from the tape head.
4) When the welding seam tracker 5 detects the tail of the strip steel, the signal is sent to the tension roller encoder 6 and the leveling machine 7 in real time, and the elapsed time at the moment is assumed to be t ═ t1+ △ T, the strip steel stroke is
The nth group of instantaneous data of the leveler 7 at this point [ dim (n) -rolling force, dim (n) -rolling quantity, dim (n) -tension, dim (n) -unit speed]Assign value to distanceA position where the tape head length is L ═ L (n). The encoder 6 calculates the length of the obtained steel coil to be L (n) + D0+ D1.
Wherein [ dim (n) -rolling force ] represents the rolling force at the position L (n) from the tape head length, and [ dim (n) -bending force ] represents the bending force at the position L (n) from the tape head length. Others may be analogized.
5) When t is equal to t1+ △ T + k ×△ T (k is more than or equal to 1, k is 1,2,3,4, 5), namely the strip steel stroke
Then, the n + k th group of instantaneous data of the leveler 7 at this moment [ dim (n + k) -rolling force, dim (n + k) -bending force, dim (n + k) -roll bending amount, dim (n + k) -tension, dim (n + k) -set speed]A position is assigned a distance L ═ L (n + k) from the tape head.
6) When | L (n + k) -L (n) -D0-D1| ≦ Vt×△ t, indicating that the tail (weld) of the strip is about to reach the temper mill 7, the last count K stops.
In the formula, Vt×△ t represents the data acquisition density, i.e., the separation distance between two adjacent points.
And assigning main process parameters including rolling force, roller bending amount, tension and unit speed of the temper mill to positions of a mother coil, which are sequentially L (1), L (2), L (3), L (4) and L (n + k) away from a strip head, according to the acquisition density with a time interval of delta t.
Therefore, according to the technical scheme of the invention, the one-to-one corresponding relation between the process data and the length position of the strip steel is established through the conversion of the data in time and space, so that all the data are 'data' with length labels. Therefore, the length positions of the strip steel are all positions endowed with the abstract meaning of a large amount of process data, the digital steel coil is a series of data sets which are attached to the physical steel coil and related to the physical steel coil, the physical length positions are used as retrieval keywords, the searched data are all related data, a perfect, accurate and reliable data basis is provided for subsequent big data analysis and mining, and the method is a very key step for realizing an intelligent factory.
Example 2:
for example, in fig. 1, the equipment in section 1 is an annealing furnace, and the equipment in section 2 is a leveler.
The section 1 is a preceding process of the section 2, 1 indicates a seam tracker, 2 indicates a tension roller encoder, 3 indicates an annealing furnace, 4 indicates a strip, 5 indicates a seam tracker of the section 2, 6 indicates an encoder of the section 2, and 7 indicates a leveler of the section 2, and the strip advances from left to right. The main function of the annealing furnace is to adjust the mechanical properties of the strip steel, but the strip steel can longitudinally extend due to the higher heating temperature.
By adopting the technical scheme of the invention, the real-time process data of the annealing furnace is assigned to the length position of the strip steel, and the specific method comprises the following steps:
the assignment method of the section 1 process parameters at the length position of the strip steel comprises the following steps:
1) the weld (i.e., the strip head) is detected by the weld tracker 1 and the signal is sent to the tension roll encoder 2 and the annealing furnace apparatus 3 in real time.
2) And (5) calculating the stroke of the strip steel. Real-time real speed V of unit output by tension roller encoder 2tIntegral with time t, i.e.
When in use
I.e. t ═ t1When the weld reaches the annealing furnace 3, the timing is started at this moment.
3) When t is equal to t1+ (n-1) ×△ t (n is more than or equal to 1, n is 2,3,4,5.. times) (△ t represents that a group of data is collected at △ t intervals), namely the travel of the strip steel
In the meantime, the n-1 th group of instantaneous data of the annealing furnace 3 at this time [ dim (n-1) — the furnace temperature of the preheating section, dim (n-1) — the furnace temperature of the heating section, dim (n-1) — the furnace temperature of the soaking section, dim (n-1) — the furnace temperature of the slow cooling section, dim (n-1) — the furnace temperature of the fast cooling section, dim (n-1) — the furnace temperature of the equalizing section, a.
4) When the seam tracker 1 detects the tail of the strip steel, the signal is sent to the tension roller encoder 2 and the annealing furnace 3 in real time, and the elapsed time at the moment is assumed to be t ═ t1+ △ T, the strip steel stroke is
The nth group of instantaneous data of the annealing furnace 3 at this time [ dim (n) -the furnace temperature of the preheating section, dim (n) -the furnace temperature of the heating section, dim (n) -the furnace temperature of the soaking section, dim (n) -the furnace temperature of the slow cooling section, dim (n) -the furnace temperature of the fast cooling section, dim (n) -the furnace temperature of the equalizing section. The length of the strip steel calculated by the encoder 2 is L (L) (n) + D0+ D1.
5) When t is equal to t1+ △ T + k ×△ T (k is more than or equal to 1, k is 1,2,3,4, 5), namely the strip steel stroke
Then, the n + k th group of instantaneous data of the annealing furnace 3 at the moment [ dim (n + k) -preheating section furnace temperature, dim (n + k) -heating section furnace temperature, dim (n + k) -soaking section furnace temperature, dim (n + k) -slow cooling section furnace temperature, dim (n + k) -fast cooling section furnace temperature, dim (n + k) -equilibrium section furnace temperature, and the like are assigned to the position with the distance zone head length of L (n + k).
6) When | L (n + k) -L (n) -D0-D1| ≦ Vt×△t(Vt×△ t, the data acquisition density, i.e. the distance between two adjacent points), indicating that the tail (weld) of the strip steel is about to reach the annealing furnace 3, and K stops counting.
And assigning main process parameters of the annealing furnace, namely rolling force, roller bending amount, tension and unit speed, to positions of the mother coil, which are sequentially L (1), L (2), L (3), L (4) and L (n + k) away from the strip head, according to the acquisition density with the time interval as delta t.
However, when the strip steel passes through the annealing furnace, the strip steel can generate longitudinal extension in the length direction due to thermal expansion, and the scaling needs to be carried out according to the principle that the volume of the strip steel is not changed, and the specific method is as follows:
as described in the previous steps 1) to 6), the incoming length L of the strip in the section 1 has been calculated from the seam tracker 1 and the roller encoder 2.
The assignment and strip length calculation method when the strip steel passes through the section 2 comprises the following steps:
according to the same method and steps, the Length of the incoming material of the strip steel in the section 2, namely the Length of the strip steel at the outlet of the section 1 can be calculated according to the seam tracker 5, the roller encoder 6 and the finishing machine 7. (Length-L) is the amount of longitudinal extension that occurs when the strip passes through the zone 1 annealing furnace,
is the longitudinal extension ratio.
The treatment method when the strip steel longitudinally extends through the process equipment comprises the following steps:
the assignment of the data of the process equipment 3 at the length position of the strip steel is changed into that:
will be provided with
Sequentially assigning the distance from the strip head to the steel coil to be
The position of (a).
According to the technical scheme, real-time production data are correspondingly assigned to the length position of the strip steel by integrating speed and time by utilizing a strip head tracker signal and a tension roller encoder, real-process data are bound with the length position of the strip steel, a large amount of real data information is given to the length position of the strip steel, one-to-one correspondence of high-frequency real-time data and the specific position of the strip steel in the production process is realized, the length position of the strip steel is taken as a link, the data in the whole production process are linked, the inheritance and inheritance of data across units can be realized, the digitalization of a digital steel coil and the production process can be realized, and the digital steel coil and the intelligent manufacturing method are the basis of digital steel coil and.
According to the technical scheme, a one-to-one correspondence hooking relation is established between the production process data and the strip steel length position through the space-time conversion of the process data, the data are all data with length labels, the strip steel length position is all positions endowed with abstract meanings of a large amount of data, the length position is used as a retrieval keyword, the searched data are all related data, and a foundation is laid for establishing a digital factory in the next step and exerting potential application values of the data.
The invention can be widely used in the process control field of various processing and treatment processes of strip steel.
Claims (6)
1. A method for assigning production process data to the length position of strip steel is characterized by comprising the following steps:
1) dividing a continuously-produced unit into a plurality of sections according to working procedures, wherein each section at least comprises a strip steel head and tail detector, a roller encoder and a working procedure device,
1) detecting the head of the strip steel by using a strip steel head and tail detector, taking the head of the strip steel as a timing starting point 0, and sending the signal to a roller encoder and process equipment in real time;
2) calculating the strip steel stroke
3) When t is equal to t1+ (n-1) ×△ t (n is more than or equal to 1, and n is 2,3,4, 5), namely the strip steel stroke
Then, the (n-1) th group of instantaneous data sets [ dim (n-1) -data1, dim (n-1) -data2, dim (n-1) -data3 and dim (n-1) -data4 ] of the process plant at this moment are read.]Assigning a position with a distance from the tape head of L (n-1);
where Δ t represents the time interval between the acquisition of a set of data; l (n-1) represents the length of the (n-1) th point from the tape head; [ dim (n-1) -data1] represents the (n-1) th data size corresponding to the data item data1, [ dim (n-1) -data2] represents the (n-1) th data size corresponding to the data item data2, and so on;
4) when the strip steel head and tail detector detects the tail of the strip steel, the signal is sent to a roller encoder and process equipment in real time, and the time t is assumed to be t1+ △ T, strip travelIs composed of
The nth set of transient data sets [ dim (n) -data1, dim (n) -data2, dim (n) -data3, dim (n) -data4.]Assigning a position with the distance L ═ L (n) to the tape head, and calculating the total length of the steel coil by using the encoder 2 to be L (n) + D0+ D1;
in the formula, Δ T represents a time interval from the arrival of the strip head at the process equipment to the arrival of the strip tail at the process equipment; l (n) represents the length of the (n) th point from the tape head; [ dim (n) -data1] represents the nth data size corresponding to the data item data1, [ dim (n) -data2] represents the nth data size corresponding to the data item data2, and so on;
5) when t is equal to t1+ △ T + k ×△ T (k is more than or equal to 1, k is 1,2,3,4, 5), namely the strip steel stroke
Then, the n + k-th group of instantaneous data sets [ dim (n + k) -data1, dim (n + k) -data2, dim (n + k) -data3, and dim (n + k) -data4.]Assigning a position with a distance from the tape head of L (n + k);
wherein L (n + k) represents the length of the (n + k) th point from the tape head; [ dim (n + k) -data1] represents the (n + k) th data size corresponding to the data item data1, [ dim (n + k) -data2] represents the n + k th data size corresponding to the data item data2, and so on;
6) when | L (n + k) -L (n) -D0-D1| ≦ Vt×△ t, namely the tail part of the strip steel is about to arrive at the process equipment, K stops counting, and the data of the complete production process of the process equipment
Sequentially assigning values to the positions of the steel coil, the lengths of which are L (1), L (2), L (3), L (4) and L (n + k) away from the head of the strip
Wherein, the time interval between two adjacent points is delta t, namely, a group of data is collected every delta t seconds;
Vt×△ t represents the data acquisition density, i.e., the separation distance between two adjacent points.
2. A method of assigning process data to strip length positions according to claim 1 wherein said step of calculating strip travel comprises the steps of:
real-time speed V of unit from encodertIntegral with time t, i.e.
When the strip steel travels
When the strip head reaches D0+ D1, the strip head reaches the process equipment, and t is t1Calculating a starting point for the length of the strip steel;
in the formula, VtRepresenting a real-time speed; t represents the time of the tape head passing through the encoder; t is t1The time taken for the head of the strip steel to reach the process equipment from the head and tail detector is shown.
3. A method of assigning positional values to strip lengths according to claim 1 wherein said process equipment includes the process equipment and its control system; the real-time signal transmission to the process equipment refers to the real-time signal transmission to the process equipment and the control system thereof.
4. A method of assigning process data to strip length positions according to claim 1, wherein said assigning means is adapted to scale the strip length by the principle of strip volume invariance if the strip length changes as it passes through the process equipment in a zone.
5. A method of assigning process data to strip length positions according to claim 4 wherein said scaling is performed according to the following method:
respectively calculating the metering lengths of the strip steel in the section 1 and the section 2 according to a strip steel head and tail detector and a roller encoder, wherein the metering lengths are respectively L and Length, L represents the strip steel Length at the inlet of the section 1, the Length represents the strip steel Length at the inlet of the section 2, if L is not equal to the Length, the strip steel Length is changed when the strip steel passes through the process equipment of the section, and the elongation ratio is
The assignment method of relevant data of the process equipment in the length direction of the strip steel is changed into the following steps:
6. The method for assigning values to the positions of the lengths of the strip steel according to the production process data as claimed in claim 1, wherein the assignment method establishes a one-to-one correspondence relationship between the process data and the positions of the lengths of the strip steel by performing space-time conversion on the production process data, thereby laying a foundation for establishing a digital factory and exerting potential application values of the data in the next step.
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