CN109465303B - Steel rail specification full-length fluctuation compensation system - Google Patents
Steel rail specification full-length fluctuation compensation system Download PDFInfo
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- CN109465303B CN109465303B CN201811327249.8A CN201811327249A CN109465303B CN 109465303 B CN109465303 B CN 109465303B CN 201811327249 A CN201811327249 A CN 201811327249A CN 109465303 B CN109465303 B CN 109465303B
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- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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Abstract
The invention relates to the field of steel rolling production, and discloses a steel rail specification full-length fluctuation compensation system which is used for automatically searching steel rail specification compensation points and generating a fluctuation compensation curve to automatically complete fluctuation compensation. The invention comprises a thermal state contourgraph, a model system and a primary control system; the model system comprises a compensation point searching module and a compensation curve generating module, wherein the thermal-state contourgraph is used for acquiring specification data of the steel rail in the length direction; the compensation point searching module is used for searching out a compensation point from the specification data of the steel rail in the length direction; the compensation curve generating module is used for generating a fluctuation compensation curve of the steel rail specification in the length direction according to the compensation points searched by the compensation point searching module; and the primary control system is used for controlling a compensation mechanism to perform fluctuation compensation according to the fluctuation compensation curve. The invention is suitable for the height specification fluctuation compensation control of the steel rail.
Description
Technical Field
The invention relates to the field of steel rolling production, in particular to a full-length fluctuation compensation system for steel rail specifications.
Background
The steel rail specification full-length fluctuation compensation technology completely eliminates the large-amplitude fluctuation of the full length of the section by analyzing the length of section areas of different varieties, height difference values and frames to be compensated and adopting a sectional control method of directly carrying out large reduction on a primary automatic control system.
At present, the application automation degree of the technology is low, many processes are manually operated, the precision and the efficiency are severely limited, and only fluctuation compensation is actually carried out on an end area. Meanwhile, in the current steel rail full-length fluctuation compensation control technology, the compensation is carried out on which position in the steel rail full-length direction is carried out, the compensation amount is manually extracted and recorded, programming is not carried out, and meanwhile, due to the fact that the variability of specification fluctuation among batches is large, the error adjusting position is easily judged manually, so that the adjusting position is low in precision, large in fluctuation of the adjusting amount, poor in adaptability, low in robustness and free of self-learning capacity.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the steel rail specification full-length fluctuation compensation system is used for automatically searching steel rail specification compensation points and generating a fluctuation compensation curve to automatically complete fluctuation compensation.
In order to solve the problems, the invention adopts the technical scheme that: the steel rail specification full-length fluctuation compensation system comprises a thermal state contourgraph, a model system and a primary control system; the model system comprises a compensation point searching module and a compensation curve generating module;
the thermal-state contourgraph is used for acquiring specification data of the steel rail in the length direction;
the compensation point searching module is used for searching out the compensation points from the specification data of the steel rail in the length direction, and the searching steps are as follows:
s1, screening and selecting all extreme points of the steel rail specification in the length direction of the steel rail from the specification data in the length direction of the steel rail;
s2, finding out extreme points in the interval limited by the upper and lower compensation limits according to the upper and lower compensation limits;
s3, starting from the first point in the length direction among the points found in the step S2, taking the first point as a first starting point, searching point by point according to the obvious deviation range of the specification values of the adjacent points, and judging whether the difference between the specification values of the starting point and the subsequent points is within the obvious deviation range, if so, continuing to search and judge, if not, stopping searching, averaging the starting point and the subsequent points within the obvious deviation range, meanwhile, taking the average value as the value of a fluctuation compensation point, and taking the position of the starting point as the position of the compensation point; then, taking the corresponding judgment point when the search is stopped as the next starting point, repeating the process again, and sequentially obtaining a new compensation point set;
s4, sequentially finding out points corresponding to integral multiples of each step value according to the step values in the length direction of the steel rail from the points found out in S3, wherein the step values are more than or equal to the corresponding steel passing length values when the adjustment is stable;
s5, in the points found in the step S4, if A, B, C is any adjacent three points in the length direction, A is adjacent to B, and B is adjacent to C, judging whether the slopes of the line segment AB and the line segment BC are within the slope deviation range, if so, deleting B, and otherwise, simultaneously keeping A, B and C;
s6, deleting points which do not need to be adjusted by using a slope size limiting condition in the obtained points in the step S5;
the compensation curve generating module is used for generating a fluctuation compensation curve of the steel rail specification in the length direction according to the compensation points searched by the compensation point searching module;
and the primary control system is used for controlling a compensation mechanism to perform fluctuation compensation according to the fluctuation compensation curve.
Further, in order to smooth the fluctuation curve and improve the reliability of the position and amount of the compensation point found, the method further comprises processing the rail specification data by means of windowing filtering before step S1, and the processing steps are as follows:
a1, intercepting the specification data without the steel rail full length end part from the specification data in the steel rail length direction, and carrying out point adding expansion on the intercepted data;
a2, selecting a window function, and determining window parameters of the window function; the window function is a Kaisan filter function or a mean smooth filter function; if the Kaisar filter function is selected, the window parameters comprise window digital sampling frequency, passband cut-off frequency, stopband cut-off frequency and the ratio of main lobe width to side lobe width; if the mean filtering function is adopted, the window parameters comprise the point number of a mean window;
a3, convolving the data obtained in the step a1 by using the window function and the window parameters thereof.
Further, the specific step of generating the fluctuation compensation curve by the compensation curve generation module includes:
finding out a stable area in the length direction of the steel rail, calculating the average value of the specifications of the steel rail in the stable area, and taking the average value as an adjusting reference value E; and sequentially connecting the compensation points searched by the compensation point searching module to obtain a first curve, and mirroring the first curve on a straight line Y-E to obtain a second curve, wherein the second curve is a fluctuation compensation curve.
Further, the steel rail specification can be the height of the steel rail.
The invention has the beneficial effects that: according to the invention, by designing the steel rail specification full-length fluctuation compensation system, the fluctuation compensation points and the corresponding fluctuation compensation curves are automatically searched by utilizing the model system, the primary control system automatically completes the fluctuation compensation of the steel rail specification in the full-length direction by combining the fluctuation compensation curves, the compensation precision and efficiency are improved, and the effect is more remarkable.
Drawings
Fig. 1 is a block diagram of the embodiment.
FIG. 2 is a graph of the compensation points and compensation curves for an embodiment.
Numbering in the figures: t1 and U1 are compensation lower limits, T2 and U2 are compensation upper limits, P1-P5 are finally searched compensation points, L1 is an original data curve, L2 is a curve after windowing filtering, and L3 is a curve to be compensated.
Detailed Description
In order to automatically complete fluctuation compensation, the invention provides a steel rail specification full-length fluctuation compensation system, which comprises a thermal-state contourgraph, a model system and a primary control system; the model system comprises a compensation point searching module and a compensation curve generating module. The thermal-state contourgraph is used for acquiring specification data of the steel rail in the length direction; in general, the specification data in the rail length direction may be data such as the height (rail height), bottom width, waist thickness, head width, leg tip thickness, and the like of the rail; the compensation point searching module is used for searching out a compensation point from the specification data of the steel rail in the length direction; and the compensation curve generating module is used for generating a fluctuation compensation curve of the steel rail specification in the length direction according to the compensation points searched by the compensation point searching module. The primary control system is used for controlling a compensation mechanism to carry out fluctuation compensation according to the fluctuation compensation curve;
the following is a detailed description of the process of searching for the compensation points and the process of generating the fluctuation compensation curve:
1. before the introduction, the present invention first explains parameters used in the search and generation processes.
1) Adjusting the reference value E: the target value of the fluctuation adjustment is replaced by the average value of the middle stable section.
2) Upper and lower limits of compensation points: [ Min | Y-E |, Max | Y-E | ]: the lower limit refers to how large the distance E is to be the compensation point, the upper limit refers to how large the distance E exceeds and then is not the compensation point, and the rest points falling in the range are all the compensation points.
3) The neighboring point specification distinguishes the difference Δ Y significantly, i.e., when the values of two neighboring points are close, less than Δ Y is considered to be the same value.
4) The step value delta X is searched in the length direction of the steel rail, namely, the step value delta X is searched at intervals of more than or less than meters or once, wherein the X can refer to the point numbers 1, 2 and 3 …, or the length of the corresponding steel rail in real time is not less than the running length of the corresponding steel rail when the TCS is regulated stably at the minimum.
5) And when the difference of the adjacent slopes is within the range, the two line segments are considered as one line segment.
2. The self-adaptive searching of the steel rail specification compensation point specifically comprises the following steps:
s1, screening and selecting all extreme points of the rail specification in the length direction of the rail from the specification data in the length direction of the rail.
In order to smooth the fluctuation curve and improve the reliability of the position and amount of the compensation point found, the rail specification data may be processed by windowing filtering before step S1, and the processing steps may include:
a1, intercepting the specification data without the steel rail full length end part from the specification data in the steel rail length direction, and carrying out point adding expansion on the intercepted data;
a2, selecting a window function, and determining window parameters of the window function; the window function is a Kaisan filter function or a mean smooth filter function; if the Kaisar filter function is selected, the window parameters comprise window digital sampling frequency, passband cut-off frequency, stopband cut-off frequency and the ratio of main lobe width to side lobe width; if the mean filtering function is adopted, the window parameters comprise the point number of a mean window;
a3, convolving the data obtained in the step a1 by using the window function and the window parameters thereof, and finishing the data processing.
And S2, screening upper and lower limits of the compensation points of the data obtained in the step S1. Namely, according to the upper and lower compensation limits, the extreme point in the interval limited by the upper and lower compensation limits is found out.
And S3, screening the points found in the step S2 for the significant deviation of the specifications of the adjacent points. That is, in the points found in step S2, starting from the first point in the length direction, the first point is first used as the first starting point, and according to the significant deviation range of the specification values of the adjacent points, the point-by-point search is performed to determine whether the difference between the specification values of the starting point and the subsequent points is within the significant deviation range, if yes, the search determination is continued, if not, the search is stopped, the average values of the starting point and the subsequent points within the significant deviation range are determined, and the average value is used as the value of a fluctuation compensation point, and the position of the starting point is used as the position of the compensation point; and then, taking the corresponding judgment point when the search is stopped as the next starting point, repeating the process again, and sequentially obtaining a new compensation point set.
And S4, step value screening is carried out on the points found in the step S3 again. That is, in the points found in step S3, points corresponding to integral multiples of each step value are sequentially found out for each step value in the length direction of the rail, where the step value is equal to or greater than the corresponding steel passing length value when the adjustment is stable.
And S5, screening the slope deviation intervals of the adjacent line segments formed by the adjacent three compensation points again. That is, if A, B, C is any three adjacent points in the length direction among the points found in step 4, a is adjacent to B, and B is adjacent to C, it is determined whether the slopes of the line segments AB and BC are within the slope deviation range, if yes, B is deleted, otherwise, A, B and C are kept.
And S6, filtering the points found in the step 5 again. Namely: and (5) deleting the points which do not need to be adjusted by using a slope size limiting condition in the obtained points in the step 5, wherein the rest points are the compensation points searched by the invention.
3. Generating a fluctuation compensation curve: firstly, finding out a stable area in the length direction of a steel rail, calculating the average value of the specifications of the steel rail in the stable area, and taking the average value as an adjusting reference value E; and then, sequentially connecting the compensation points searched by the compensation point searching module to obtain a first curve, and mirroring the first curve on a straight line Y-E to obtain a second curve, wherein the second curve is a fluctuation compensation curve.
Examples
The invention will be further explained below by taking the compensation of the height fluctuation of a hundred-meter rail as an example.
The embodiment provides a steel rail specification full-length fluctuation compensation system, which comprises a thermal state contourgraph, a model system and a primary control system; wherein, the thermal state contourgraph is mainly responsible for generating height data; the model system is mainly responsible for building a fluctuation model and comprises a search compensation point and a fluctuation compensation curve; the primary control system is in time sequence control and is responsible for issuing fluctuation instructions. Each part in the embodiment system is specifically described below by the workflow of the embodiment.
First, raw data acquisition
The thermal profiler is based on an FTP file transfer protocol, when the thermal profiler generates a new height record, the new height record is exported and stored, and the file is generated to be used as a trigger signal for file transfer and is transferred to the model system.
Second, processing the original data
After the model system receives the raw data, certain processing is required, and the raw data processing in the embodiment can adopt the following steps:
a1, intercepting the height data without the end part of the steel rail full length from the original height data, and adding points to the intercepted data for expansion. Because the height data of the steel rail full-length end part measured by the contourgraph is inaccurate, the data is intercepted firstly; since directly convolving the window function with the original data will pull the end data very low, resulting in cliff, the original data is subjected to point-adding expansion.
a2, selecting a window function, and determining window parameters of the window function; the window function is a Kaisan filter function or a mean smooth filter function; if the Kaisar filter function is selected, the window parameters comprise window digital sampling frequency, passband cut-off frequency, stopband cut-off frequency and the ratio of main lobe width to side lobe width; if a mean filter function is used, the window parameters include the number of points of a mean window, and the parameters can be determined according to the spectral analysis of data;
a3, convolving the data obtained in the step a1 by using a window function and window parameters thereof, and obtaining a curve L2 after windowing and filtering an original data curve L1 as shown in FIG. 1.
Third, compensation point searching process
After the original data is processed, a compensation point searching module in the model system performs compensation point searching, and the embodiment searching process can adopt the following steps:
step 1, after processing original data, finding out all extreme points of the height of the steel rail in the length direction of the steel rail in the figure 2;
step 2, finding out extreme points in an interval defined by the upper and lower compensation limits according to the upper compensation limits T2 and U2 and the lower compensation limits T1 and U1, namely finding out points in intervals of [ T1, T2] and [ U2, U1] in the graph 2;
step 3, starting from the first point in the length direction in the points found in the step 2, taking the first point as a first starting point, searching point by point according to the obvious deviation range of the adjacent point height values, and judging whether the difference between the starting point and the subsequent point height values is within the obvious deviation range, if so, continuing searching and judging, if not, stopping searching, averaging the starting point and the subsequent points within the obvious deviation range, simultaneously taking the average value as the value of a fluctuation compensation point, and taking the position of the starting point as the position of the compensation point; then, taking the corresponding judgment point when the search is stopped as the next starting point, repeating the process again, and sequentially obtaining a new compensation point set;
and 6, deleting the points which do not need to be adjusted by using a slope limit condition from the obtained points in the step 5, wherein the rest points are the searched compensation points, and the system finishes searching, and as shown in fig. 2, P1-P5 are the final searched compensation points.
Fourth, the generation of fluctuation compensation curve
After the compensation point search is completed, a compensation curve generation module in the model system generates a fluctuation compensation curve of the steel rail specification in the length direction according to the searched compensation point, and the generation steps of the fluctuation compensation curve of the embodiment are as follows:
b1, finding out a stable area of the height of the steel rail in the length direction, calculating the average value of the height of the steel rail in the stable area, and taking the average value as an adjusting reference value E;
b2, sequentially connecting the points P1-P5 obtained in the step b1 to obtain a curve L3 to be compensated, and mirroring the curve L3 to be compensated about the straight line Y-E to obtain the roll gap compensation curve.
Fifth, fluctuation compensation control
After the first-level control system receives the roll gap compensation curve and the compensation command, firstly, the position of the compensation point is converted into the corresponding meter length position before the adjusting frame or the finished product frame rolls according to the extension ratio or the coefficient.
Then, when the next steel rail comes, the length of the steel rail passing through the rolling mill is tracked and recorded, when a certain part of the steel rail reaches a specified full-length compensation point, compensation is carried out according to a roll gap compensation curve, and the process is repeated until the compensation is completed when the next compensation point is reached.
When the first compensation point or the last compensation point is within a certain distance from the end part, the value of the closest point of the full length head part is used as a parallel line for compensation from the beginning of biting, or the value of the closest point of the full length tail part is used as a parallel line for compensation before tailing discarding, when the first compensation point or the last compensation point is beyond the certain distance from the end part, the beginning point and the end point are positioned at a certain position of the two end parts, and the compensation line returns to a certain position within a reasonable tolerance band.
Finally, in order to eliminate fluctuation variation in batches, two schemes of automatic compensation and guided compensation are adopted, the automatic compensation is adopted, the guided compensation refers to direct reference transmitted by a model system, and only personnel with certain operation authority can manually intervene in a compensation value and execute compensation or not.
Claims (4)
1. The steel rail specification full-length fluctuation compensation system is characterized by comprising a thermal state contourgraph, a model system and a primary control system; the model system comprises a compensation point searching module and a compensation curve generating module;
the thermal-state contourgraph is used for acquiring specification data of the steel rail in the length direction;
the compensation point searching module is used for searching out the compensation points from the specification data of the steel rail in the length direction, and the searching steps are as follows:
s1, screening and selecting all extreme points of the steel rail specification in the length direction of the steel rail from the specification data in the length direction of the steel rail;
s2, finding out extreme points in the interval limited by the upper and lower compensation limits according to the upper and lower compensation limits;
s3, starting from the first point in the length direction among the points found in the step S2, taking the first point as a first starting point, searching point by point according to the obvious deviation range of the specification values of the adjacent points, and judging whether the difference between the specification values of the starting point and the subsequent points is within the obvious deviation range, if so, continuing to search and judge, if not, stopping searching, averaging the starting point and the subsequent points within the obvious deviation range, meanwhile, taking the average value as the value of a fluctuation compensation point, and taking the position of the starting point as the position of the compensation point; then, taking the corresponding judgment point when the search is stopped as the next starting point, repeating the process again, and sequentially obtaining a new compensation point set;
s4, sequentially finding out points corresponding to integral multiples of each step value according to the step values in the length direction of the steel rail from the points found in the step S3, wherein the step values are more than or equal to the corresponding steel passing length values when the adjustment is stable;
s5, in the points found in the step S4, if A, B, C is any adjacent three points in the length direction, A is adjacent to B, and B is adjacent to C, judging whether the slopes of the line segment AB and the line segment BC are within the slope deviation range, if so, deleting B, and otherwise, simultaneously keeping A, B and C;
s6, deleting points which do not need to be adjusted by using a slope size limiting condition in the obtained points in the step S5;
the compensation curve generating module is used for generating a fluctuation compensation curve of the steel rail specification in the length direction according to the compensation points searched by the compensation point searching module;
and the primary control system is used for controlling the compensation mechanism to perform fluctuation compensation according to the fluctuation compensation curve, converting the position of a compensation point into a corresponding meter-long position before the adjustment frame or the finished product frame is rolled after the primary control system receives the roll gap compensation curve and a compensation command, then tracking and recording the meter length of the steel rail passing through the rolling mill when the next steel rail comes, starting to perform compensation according to the roll gap compensation curve when a certain part of the steel rail reaches a specified full-length compensation point, and repeating the process until the compensation is completed when the next compensation point is reached.
2. The system of claim 1, further comprising a windowing filter for processing the rail gauge data prior to step S1, the processing steps comprising:
a1, intercepting the specification data without the steel rail full length end part from the specification data in the steel rail length direction, and carrying out point adding expansion on the intercepted data;
a2, selecting a window function, and determining window parameters of the window function; the window function is a Kaisan filter function or a mean smooth filter function; if the Kaisar filter function is selected, the window parameters comprise window digital sampling frequency, passband cut-off frequency, stopband cut-off frequency and the ratio of main lobe width to side lobe width; if the mean filtering function is adopted, the window parameters comprise the point number of a mean window;
a3, convolving the data obtained in the step a1 by using the window function and the window parameters thereof.
3. The system for compensating for full rail gauge fluctuation according to claim 1, wherein the specific steps of the compensation curve generation module generating the fluctuation compensation curve include:
finding out a stable area in the length direction of the steel rail, calculating the average value of the specifications of the steel rail in the stable area, and taking the average value as an adjusting reference value E; and sequentially connecting the compensation points searched by the compensation point searching module to obtain a first curve, and mirroring the first curve on a straight line Y-E to obtain a second curve, wherein the second curve is a fluctuation compensation curve.
4. The system of claim 1, wherein the rail gauge is the height of the rail.
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| CN102601124B (en) * | 2012-03-09 | 2014-04-09 | 攀钢集团攀枝花钢钒有限公司 | Method for controlling bottom width full-length fluctuation of steel rail |
| CN105537280B (en) * | 2016-03-08 | 2018-07-06 | 攀钢集团攀枝花钢钒有限公司 | Improve the supplied materials specifications control method that rail rectifys rear homogeneity of fault plane |
| CN105678037B (en) * | 2016-03-23 | 2018-11-23 | 攀钢集团攀枝花钢钒有限公司 | Improve the method for the elongated uniformity of specifications section after rail is rectified |
| CN108984485B (en) * | 2018-07-02 | 2022-06-17 | 攀钢集团攀枝花钢钒有限公司 | Method for adaptively searching steel rail specification compensation points and acquiring corresponding compensation curves |
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