TWI458572B - Control device and control method - Google Patents

Description

Control device and control method

The present invention relates to a control device for controlling a hot rolling device, and more particularly to a control device that has more than two measuring devices and can continue to operate properly even in the case of a malfunction of the measuring device. Control method control device and control method.

In recent years, the quality requirements of customers who are rolling products led by steel have become more stringent and require a high level of quality management. For example, in the hot rolling apparatus, the management items such as the thickness of the rolled material, the width of the sheet, the temperature at the exit side of the finishing mill, and the winding temperature are required to be controlled in a predetermined management range. Each machine of the hot rolling device.

For example, the width of the sheet material to be rolled is about 600 mm to 2,300 mm. In contrast, the sheet width accuracy after finish rolling is required to be in the management range of about 0 mm to 8 mm with respect to the target value. Further, the management width is a value required for the entire length of the rolled material (transfer direction) with respect to the width of the sheet required for the finished product, and the deviation is managed with respect to the target value in the interval. When the width becomes negative, the correction cannot be performed.

Therefore, in order to perform quality management with high board width accuracy without deviating from the management width, it is necessary to control by using a width correction means such as a slab sizing press and an edger. . When the trimmer was used, the horizontal grinding machine was used to thin the thickness of the plate. At this time, the trimming opportunity is used to generate a local deformation portion called the end portion in the width direction of the dog bone and the width direction deformation caused by the depression of the horizontal grinder of the portion or caused by the horizontal grinder. The width is expanded. In addition, the degree of deformation of the rolled material (i.e., deformation resistance) also changes due to temperature changes in the rolling. Therefore, it is extremely difficult to accurately calculate the amount of variation in the plate width caused by the trimmer and the horizontal grinder using the calculation model. Therefore, the main management point on the hot rolling device (rolling line) is provided with a width measuring device for measuring the width of the plate, and the board width measured by the width measuring device is used for precision management. There are many situations in which the computational model is studied.

Patent Document 1 describes a method for controlling a plate width for correcting a target value of the exit side width of a finishing mill, and measuring width and predetermined winding obtained by a width measuring device disposed before a winding machine for rolling materials. The deviation value of the machine front width target value is equal to the width deviation value measured by the width measuring device disposed on the exit side of the finishing mill and the width deviation value of the predetermined mature finishing exit side width target value.

(previous technical literature)

(Patent Literature)

Patent Document 1: Japanese Patent No. 3341622

In the past, since the measuring instrument was necessary for maintenance, a plurality of measuring devices were installed at the same position on the rolling line. But rarely, except for the fact that the gauge itself is cheaper. However, in recent years, there have also been cases where a plurality of measuring instruments are provided and the measuring instruments are switched.

For example, there is a width measuring device that detects an edge by a CCD camera to measure the width of the plate width, or a plurality of X-ray detectors disposed in the plate width direction to perform edge detection from the X-ray transmission amount. A multi-measurement width measuring device such as a device, and switching the use of these measuring devices. However, because of the different measurement methods of the width measurer, the measured plate width values may be different.

Further, depending on the configuration of the production line, there may be a case where a plurality of width measuring instruments having the same measurement method are disposed at the same or close quality management points such as the finishing mill exit side. For example, there is also a first width measuring device that is used as a common system (mainly), and a second width measuring device that is used as a very useful system (standby), and when the first width measuring device fails, Continue to measure the width by switching to the second width gauge.

However, the first width measuring device and the second width measuring device of the measuring device belonging to the same measuring method have a measured value even when testing the same measuring object point of the rolled material. Different situations. This is presumably: the measurement points are slightly deviated, and as a result, the measurement points are different; and the measure itself has individual differences. These situations are called machine differences. When there is such a difference, in the case where the first width measuring device is faulty, even if it is switched to the second width measuring device, it is conceivable that the measured value has a different situation. Therefore, since the measured value suddenly changes, the control of the hot rolling device is affected, and as a result, the quality of the finished product changes.

Similarly, even if the board width control method described in Patent Document 1 is used, when the width measuring device is switched, since the measured value suddenly changes at the time of switching, the control of the hot rolling device is affected. As a result, the quality of the finished product changes.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a control device which can control the hot rolling device without changing the measurement value even if the measuring device is switched from one measuring device to the other. Control devices and control methods that continue to be carried out.

In order to achieve the above object, the first feature of the control device of the present invention is characterized in that: a first measuring portion is provided, and a processing value of a rolling line for rolling the rolled material is used as a first processing value. The second measuring unit is configured to measure the same processing value as the first processing value of the rolling line of the roll as the second processing value; the abnormality detecting unit is configured to detect the abnormality of the first measuring unit And processing the information storage unit, the first processing value, the second processing value, the measurement time point information for displaying the time point of measuring the first processing value and the second processing value, and displaying the borrowing time The abnormality detecting time point information at the time point when the abnormality detecting unit detects the abnormality is associated and stored as the processing data; the learning item calculating unit calculates, according to the processing information, the second processing value to be close to the foregoing a learning item in which the first processing value is corrected; a learning item storage unit for memorizing the learning item calculated by the learning item calculating unit; and a correction unit according to the processing capital And correcting the processing value by the learning item memorized by the learning item storage unit, thereby generating a corrected processing value; and the selecting unit selects the time when the abnormality detecting unit detects the abnormality according to the processing information. The first processed value before the point and the corrected processed value after the time when the abnormality detecting unit detects the abnormality; and the device control unit according to the processed value and the corrected processed value selected by the selecting unit, The control of the aforementioned rolling line is carried out.

In order to achieve the above object, a second feature of the control device of the present invention is that the learning item calculation unit calculates a difference between the first processed value and the second processed value based on processing information stored in the processed value memory unit, and Calculating the new aforementioned learning item by the exponential smoothing method according to the difference calculated above and the aforementioned learning item stored in the previous rolling of the learning item storage unit, and calculating the new learning item calculated as described above It is stored in the learning item memory section.

In order to achieve the above object, a third feature of the control device of the present invention is that the abnormality detecting unit calculates a standard deviation of the first machining value, and determines that the standard deviation exceeds a predetermined range or is zero. An abnormality is generated in the aforementioned first measuring portion.

In order to achieve the above object, a fourth feature of the control device of the present invention is that the learning item calculation unit is based on a positional relationship between the first measuring portion and the second measuring portion relative to the rolled material. The difference between the first processed value and the second processed value measured at the same location is calculated as a learning term for correcting the second processed value so as to be close to the first processed value.

In order to achieve the above object, the first feature of the control method of the present invention is to have the following steps: a first measuring step of measuring a processing value of a rolling line which is rolled by a rolled material as a first processing value; a second measuring step of measuring the same type of processing value as the first processing value of the rolling line as the second processing value; the abnormal detecting step for detecting the abnormality of the first measuring step; processing information The memory step of measuring the time point information of the first processing value, the second processing value, and the time point for measuring the first processing value and the second processing value, and displaying the abnormality by using the foregoing abnormality The detection step detects the abnormal time point of the abnormality detection time point information association, and is stored as processing information in the processing information memory unit; the learning item calculation step is calculated according to the processing information to calculate the second processing value a learning item corrected in a manner close to the first processing value; a learning item remembering step, the learning calculated by the aforementioned learning item calculating step Memorizing the learning item memory unit; the correcting step, according to the processing information, correcting the second processing value by the learning item memorized by the learning item memory step, thereby generating a corrected processing value; and selecting a step according to the processing information And selecting the first processing value before the time point when the abnormality is detected by the abnormality detecting step, and the corrected processing value after the time point when the abnormality detecting step is detected by the abnormality detecting step; and the machine control step The processing of the rolling line is controlled by the machining value and the corrected machining value selected in the above selection step.

In order to achieve the above object, a second feature of the control method of the present invention is that the learning item calculation step calculates a difference between the first processing value and the second processing value according to processing information stored in the processing value memory unit. And calculating the new learning item by the exponential smoothing method according to the difference calculated above and the learning item stored in the above-mentioned rolling of the learning item memory unit, and calculating the new calculated item The learning item is memorized in the learning item memory section.

In order to achieve the above object, a third feature of the control method of the present invention is that the abnormality detecting step calculates a standard deviation of the first processing value, and determines that the standard deviation exceeds a predetermined range or is zero. An abnormality is generated in the first measuring unit.

In order to achieve the above object, a fourth feature of the control method of the present invention is that the learning item calculation step is based on the position of the rolled material relative to each other by the first measuring step and the second measuring step. The relationship between the first processed value and the second processed value measured at approximately the same location is calculated, and a learning term for correcting the second processed value so as to be close to the first processed value is calculated.

According to the control device and the control method of the present invention, even when the measuring device is switched from one measuring device to the other, the measured value does not suddenly change, and the hot rolling device can be appropriately continued. control.

The configuration of the control device according to the first embodiment of the present invention will be described.

(Composition of hot rolling mill)

Fig. 1 is a view showing the configuration of a hot rolling mill controlled by a control device according to a first embodiment of the present invention. The arrow in Fig. 1 shows the direction in which the rolled material 200 is rolled in the hot rolling apparatus (hot rolling line). In general, the rolled material 200 is also referred to as a slab, a bar, or a coil in the rolling process of the hot rolling apparatus. Here, it is uniformly referred to as the rolled material 200.

As shown in Fig. 1, the hot rolling apparatus 100 includes a heating furnace 101, a preliminary descaler 103, a rough trimmer 105, a roughing mill 107, a rough rolling exit side width gauge 109, and a thick Rolling outlet side thermometer 111, finishing rolling side thermometer 113, plate shearing machine 115, secondary descaler 117, finishing mill 119, finishing rolling side thickness gauge 121, multi-purpose The detector 123, the finish rolling outlet side thermometer 125, the flatness meter 127, the run out lamina spray cooling unit 129, the coiler inlet side thermometer 131, the coiler inlet side plate width gauge 133, and the coiler 135 .

The heating furnace 101 is a furnace for heating the material to be rolled 200.

The preliminary descaling machine 103 is formed by forming an oxide film on the surface of the rolled material 200 by heating of the heating furnace 101, and removing it by spraying high-pressure water from the vertical direction of the rolled material 200.

The rough trimming machine 105 performs rolling in the width direction of the rolled material 200 as viewed from the upper side of the hot rolling line.

The roughing mill 107 is provided with a single or a plurality of roll stands for performing rolling in the vertical direction of the rolled material 200. Further, in the roughing mill 107, from the viewpoint of preventing a temperature drop, it is necessary to shorten the length of the production line, and it is necessary to perform a plurality of pass rolling. Therefore, it is often the case that the reversible rolling mill is included. . Further, the roughing mill 107 is provided with a descaling machine for spraying high-pressure water to the rolled material 200 belonging to the semi-finished product to remove the oxide film on the surface. Since the rolling is performed at a high temperature, an oxide film is easily formed, and therefore it is necessary to appropriately use a device for removing such an oxide film.

The rough rolling exit side panel width gauge 109 is used to measure the sheet width of the semi-finished product of the rolled material 200 belonging to the rolling.

The rough rolling exit side thermometer 111 is for measuring the surface temperature of the semi-finished product of the rolled material 200 belonging to the rolling.

Since the finish rolling side thermometer 113 is long since the distance between the rough rolling mill 107 and the finishing mill 119 is long, the surface temperature of the rolled material 200 is measured at the inlet of the finishing mill 119.

The plate end shear 115 is used to shear the front and rear ends of the rolled material 200.

The secondary descaling machine 117 is provided at the inlet of the finishing mill 119 because the distance between the roughing mill 107 and the finishing mill 119 is long to improve the surface characteristics of the rolled material 200 after the finish rolling. The oxide film formed on the surface of the rolled material 200 after the rough rolling is removed by spraying high-pressure water from the vertical direction of the rolled material 200.

The finishing mill 119 is a tandem type roll set provided with a plurality of stands, which are called roll stands, and is rolled from the upper and lower sides by a plurality of rolls, thereby obtaining a rolled material of a target thickness. 200. In order to suppress the formation of an oxide film and to control temperature, the roll stand and the roll stand of this finishing mill 119 are equipped with a spray.

The finishing rolling side thickness gauge 121 is for measuring the thickness of the rolled material 200 rolled by the finishing mill 119. In order to control the thickness of the rolled material 200 within the target range, the plate thickness value measured by the finish rolling side thickness gauge 121 is used as the machining value to control the feedback at the rolling position of the finishing mill 119.

A multi-channel Gauge 123 belonging to the X-ray measuring device is configured to arrange the X-ray detector in the width direction of the rolled material 200, and to measure the width of the width in the width direction. The distributor is a composite type measuring device capable of measuring a plurality of processing values such as a plate thickness, a crown, and a plate width.

The finish rolling exit side thermometer 125 is for measuring the surface temperature of the rolled material 200 after the rolling of the finishing mill 119. The temperature of the rolled material 200 is closely related to the formation and material of the metal structure of the finished product, and it is necessary to appropriately manage the temperature.

The flatness meter 127 is for measuring the flatness of the rolled material 200 after the rolling of the finishing mill 119. Further, the flatness meter 127 is provided with a plurality of CCD cameras, and the plate width of the rolled material 200 can also be measured. The flatness meter 127 is more accurate in measuring the amount of the measuring device 123. Therefore, in terms of the board width value on the exit side of the finishing mill 119, the board width value measured by the flatness meter 127 is often used.

The discharge spray cooling unit 129 is a device for controlling the temperature of the material to be rolled 200, and cooling the rolled material 200 by cooling water. These devices are provided with forced cooling devices in addition to the general run out table.

The winder inlet side thermometer 131 is for measuring the surface temperature of the rolled material 200 cooled by the discharge spray cooling unit 129. The temperature of the rolled material 200 is closely related to the formation and material of the metal structure of the finished product, and it is necessary to appropriately manage the temperature.

The winder inlet side plate width gauge 133 is for measuring the plate width of the rolled material 200 cooled by the discharge spray cooling unit 129. Among the general rolling, the rolled material 200 heated to reach the austenite region is transformed into a ferrite or a pearlite in the discharge spray cooling portion 129. After the organization, it is necessary to measure the plate width after metamorphosis. In addition, about 860 ° C on the exit side of the finishing mill 119 and about 600 ° C on the inlet side of the coiler 135, the measurement can be performed in the state of being closer to room temperature. The board width is measured in a state where the temperature error is small.

The winder 135 is wound up by the rolled material 200 for transfer.

(Functional configuration of the control device 1)

Fig. 2 is a view showing the functional configuration of a control device according to an embodiment of the present invention. In addition, in the second drawing, the case where the multi-measurement detector 123 is used as the first measuring unit and the flatness meter 127 is used as the second side fixing portion will be described.

As shown in Fig. 2, the control device 1 according to the embodiment of the present invention includes a processing information storage unit 2, a learning item storage unit 3, a control unit 4, and a performance correction processing information storage unit 5, and the above-described multi-purpose The board width value measured by the measurer 123 is supplied thereto, and the board width value measured by the flatness meter 127 is also supplied thereto.

The processing information storage unit 2 displays the board width value of the first processing value measured by the multi-measurement detector 123, the board width value belonging to the second processing value measured by the flatness meter 127, and displays the value. The measurement time point information of the measurement time point of the equal-width value is associated with the abnormality detection time point information for displaying the time point at which the abnormality detecting unit 12 detects an abnormality, and is memorized as processing information.

Fig. 3 is a view showing an example of processing information of one of the processed information storage units 2 included in the control device according to the embodiment of the present invention.

As shown in FIG. 3, the board width value (symbol 202) belonging to the first processing value and the flatness meter 127 are measured by the multi-measurement detector 123 at each measurement time t (symbol 201). The board width value (symbol 203) which is measured and belongs to the second processing value, and an error code (abnormality detection time point information) indicating whether or not the abnormality is detected by the abnormality detecting unit 12 to be described later (element symbol 204) ) Establish associations and record them as processing information. When the error code (abnormality detection time point information) is "1", the abnormality detecting unit 12 detects that there is an abnormality, and when it is "0", the abnormality detecting unit 12 displays Failure to detect an abnormal condition.

The learning item storage unit 3 memorizes the learning item calculated by the learning item calculating unit 13 which will be described later.

Fig. 4 is a view showing an example of a learning item stored in the learning item storage unit 3 included in the control device 1 according to the embodiment of the present invention.

As shown in FIG. 4, the learning item storage unit 3 stores the learning item tables 300 to 500 in the steel type A to the steel type C.

The learning item tables 300 to 500 respectively have learning items Z corresponding to the target board widths X(1)...X(m) and the target board thicknesses Y(1)...Y(n). For example, in the learning item table 300 of the steel type A, the learning item Z _A (m) 1 is memorized for the learning item corresponding to the target board width X (m) and the target board thickness Y (1).

The actual performance correction processing information 5 is based on the fact that the processing information does not include an error code for displaying an abnormality detected by the abnormality detecting unit 12, and the board width value measured by the multi-measurement detector 123 is used as the actual performance correction processing. The information is memorized. When an error code indicating that an abnormality is detected by the abnormality detecting unit 12 is included, the multi-sensor 123 is selected before the time when the abnormality detecting unit 12 detects the abnormality. The measured plate width value and the correction plate width value generated by the correction unit 14 to be described later after the abnormality detecting unit 12 detects the abnormality are stored as the actual performance correction processing information.

The control unit 4 performs central control of the control device 1. Further, the control unit 4 includes a processing information memory control unit 11, an abnormality detecting unit 12, a learning item calculating unit 13, a correcting unit 14, a selecting unit 15, and a device control unit 16.

The processing information memory control unit 11 is configured to measure the time point information of the first processing value, the second processing value, and the measurement time point for displaying the first processing value and the second processing value, and to display the abnormality The abnormality detection time point information of the time point at which the detecting unit 12 detects the abnormality establishes a correlation, and is stored in the processed information memory unit 2 as processing information.

The abnormality detecting unit 12 is configured to detect an abnormality of the multi-sensor 123 (first measuring unit). Specifically, the abnormality detecting unit 12 calculates a standard deviation of a fixed time or a fixed length machining value of a piece of the rolled material 200, and when the standard deviation is larger or smaller than a certain value, It is determined that an abnormality has occurred in the multi-measurement detector 123 (first measurement unit).

The learning item calculation unit 13 calculates a learning item required to correct the second machining value so as to approach the first machining value based on the machining information.

The correction unit 14 corrects the second machining value by the learning item Z stored in the learning item storage unit 3 based on the machining information, thereby generating a correction plate width value (corrected machining value).

The selection unit 15 selects the board width value measured by the multi-measurement detector 123 in the case where the error code for displaying the abnormality detected by the abnormality detecting unit 12 is not included in the processing information according to the processing information. When there is an error code for displaying an abnormality detected by the abnormality detecting unit 12, the first machining value measured by the multi-measurement detector 123 before the time when the abnormality detecting unit 12 detects the abnormality is selected. And a corrected plate width value (corrected machining value) generated by the correction unit 14 which will be described later after the abnormality detecting unit 12 detects the abnormality.

The machine control unit 16 controls the rolling line in accordance with the setting conditions of the target plate width, the target thickness, and the steel type supplied from the outside, the machining value selected by the selection unit 15, and the corrected machining value. Specifically, the heating furnace 101, the preliminary descaling machine 103, the rough trimming machine 105, the roughing mill 107, the plate end shearing machine 115, the secondary descaling machine 117, the finishing mill 119, and the discharge spray cooling are controlled. Portion 129 and coiler 135.

Further, the machine control unit 16 calculates a setting required for high-precision of the rolled material 200 to be rolled, for example, in the case of a plate width, in order to roll the rolled material 200. The deviation amount of the width from the target value of the board width is reduced, and the board width performance value of each of the rolled materials 200 is compared with the board width target value, thereby implementing the board width learning which belongs to the setting calculation learning function.

In the learning function, the calculated value calculated by the molding after rolling is usually compared with the measured value to absorb the model calculation error. This calculation calculation function is described in P.291, "The Theory and Practice of Plate Rolling" (Japan Iron and Steel Association: 1984).

Further, when the abnormality detecting unit 12 detects an abnormality, the device control unit 16 may use the board width value belonging to the second processing value measured by the flatness meter 127 instead of the first one. The plate width value of the machining value for feedback control.

(The role of the control device 1)

Fig. 5 is a flow chart showing the processing procedure of the control device 1 according to an embodiment of the present invention. Further, in Fig. 5, a case where the multi-measurement detector 123 is used as the first measurement portion and the flatness meter 127 is used as the second measurement measurement portion will be described as an example.

As shown in Fig. 5, the learning item calculating unit 13 of the control unit 4 determines whether or not the rolling of the rolled material 200 has been completed (step S101). Specifically, when a part of the rolled material 200 is sequentially supplied from the heating furnace 101 provided in the hot rolling apparatus 100 and wound by the winder 135, the machine control unit 16 determines that it is a roller. The rolling of the rolled material 200 has ended.

When it is determined in step S101 that the rolling of the rolled material 200 has been completed (in the case of YES), the learning item calculating unit 13 reads the processing information stored in the processed information storage unit 2 (step S103). .

Next, the learning item calculation unit 13 calculates the difference of the measured values (step S105). Specifically, the learning item calculation unit 13 calculates the board width value B ₁ (first processing value) set by the multi-sensor 123 at an arbitrary time point based on the processing information read in step S103, And the board width value B ₂ (second processing value) measured by the flatness meter 127, and the difference δ is calculated using the following (Formula 1).

δ= B ₁ - B ₂ (Formula 1)

Next, the learning item calculation unit 13 calculates the learning item Z (step S107). Specifically, the learning item calculation unit 13 selects a learning item corresponding to the steel type of the rolled material 200 that has been rolled in step S101, the target thickness X, and the target thickness Y from the learning item storage unit 3. It is extracted as the learning term Z _n-1 calculated at the time of the last rolling. Then, the learning item calculation unit 13 smoothes the learning item Z calculated at the time of the last rolling by the exponential smoothing method using the difference δ calculated in step S105 and Equation 2 below. In order to calculate a new learning item Z _n . Further, in Equation 2, Z _{n-1 is} used as the learning term calculated at the time of the last rolling, and Z _{n is indicated} as the learning term calculated at the time of this rolling.

Z _n =(1-β)‧ Z _{n -1} +β‧δ (Formula 2)

Here, the β system is a learning gain, and its value is in the range of 0 to 1.0. The learning gain β is closer to 1.0, and the faster the learning speed is, the more easily it is affected by the abnormal value, and it is usually set to about 0.3 to 0.4.

Next, the learning item calculation unit 13 stores the calculated learning item Z in the learning item storage unit 3 (step S109). Specifically, the learning item calculation unit 13 associates the steel type of the rolled material 200 that has been rolled in the step S101 in the learning item table stored in the learning item storage unit 3, the target plate width X, and the corresponding The learning item Z _{n-1 of the} target sheet thickness Y is written on the learning item Z calculated in step S107.

Next, the correction unit 14 of the control unit 4 generates a corrected machining value (step S111). Specifically, the correction unit 14 based on the machining information memory according to the processing information storage unit 2, using the following formula 3, to the memory unit by the learning item value by the sheet width meter 127 measure the flatness of B ₂ 3 The learned learning term Z is corrected to generate a corrected width value B ₂ ^COMP belonging to the corrected machining value.

B ₂ ^comp = B ₂ + Z (Equation 3)

Then, the selection unit 15 of the control unit 4 determines whether or not there is an abnormality in the multi-measurement detector 123 (first measurement unit) in the rolling of the rolled material 200 that has been subjected to the rolling in step S101 (step S113). . Specifically, the processing information stored in the information memory unit 2 and corresponding to the rolled material 200 that has been rolled in step S101 is displayed by the included error code (abnormality detection time point information). When the data of 1" exists, the selection unit 15 determines that there is an abnormality in the multi-sensor 123.

In step S113, when it is determined that there is no abnormality in the multi-measurement detector 123 (in the case of No), the selection unit 15 selects the board width value measured by the multi-measurement detector 123 (first measurement unit). Specifically, the selection unit 15 selects the amount of information processed by the multi-measurement detector 123 from the processing information stored in the processing information storage unit 2 and corresponding to the rolled material 200 that has been rolled in step S101. The measured board width value (step S115).

On the other hand, if it is determined in step S113 that there is an abnormality in the multi-measurement detector 123 (in the case of YES), the selection unit 15 selects the measurement by the multi-measurement detector 123 before the point in time when the abnormality is detected. The board width value and the correction board width value generated by the correction unit 14 after the time point when the abnormality is detected (step S117).

For example, in the example of Fig. 3, at time t201, when the value of the error code 204 is changed from "0" to "1" at the time point of "00:10:10", the selection unit 15 selects the time t201 at The board width value 202 measured by the multi-measurement detector 123 before the time point of "00:10:00", and the selection time t201 is after the time point of "00:10:10" by the correction unit 14 The resulting correction plate width value.

Next, the selection unit 15 uses the plate width value measured by the multi-sensor 123 selected in step S115 or the multi-dose before the time point at which the abnormality is detected in step S117 is detected. The board width value measured by the detector 123 and the correction board width value generated by the correction unit 14 after the time point when the abnormality is detected are stored in the actual performance correction processing information 5 as the actual performance correction processing information (step S119). .

Fig. 6 is a view for explaining the processing information stored in the processing information storage unit 2 and the actual performance correction processing information stored in the actual performance correction processing information storage unit 5 in the control device 1 according to the embodiment of the present invention.

The 601 series shown in FIG. 6 shows the board width value measured by the multi-measurement detector 123, and the 602 series shows the board width value measured by the flatness meter 127, and the 603 series is displayed by the correction section 14. The resulting correction plate width value.

As shown in FIG. 6, the correction is calculated by the flatness meter 127 based on the difference in the board width values measured by the multi-measurement detector 123 and the flatness meter 127 at the time point t1 at any time point. The learning term Z required for the measured plate width value.

Next, at the time t2, the board width value measured by the multi-measurement detector 123 has become a fixed value, so that the standard deviation can be determined to be zero, and it can be determined that there is an abnormality in the multi-sensor 123 after the time point t2. Therefore, the selection unit 15 of the control unit 4 selects the board width value 601 measured by the multi-sensor 123 before the time t2 when the abnormality detecting unit 12 detects the abnormality, and detects by the abnormality detecting unit 12. The correction plate width value 603 generated by the correction unit 14 after the abnormal t2 time point is stored in the actual performance correction processing information storage unit 5 as the actual performance correction machining information.

Thereby, even in the case where the multi-measurement detector 123 generates an abnormality, the memory can be performed without causing the measured value to suddenly change.

As described above, the control device 1 according to the embodiment of the present invention is provided with a plate width value (process value) of a rolling line (hot rolling device) for rolling the rolled material 200 as the first The multi-measurement measuring device 123 (the first measuring portion) for measuring the processing value; in the rolling line (hot rolling device), the plate width value belonging to the same kind as the first processing value is used as the second processing value a measured flatness meter 127 (second measuring portion); an abnormality detecting portion 12 for detecting an abnormality of the multi-measure detector 123 (first measuring portion); and a first processing value and a second processing value for The measurement time information indicating the measurement time point of the first machining value and the second machining value is associated with the abnormality detection time point information for displaying the time point at which the abnormality detecting unit 12 detects the abnormality, and is processed as a processing information storage unit 2 for memorizing information; a learning item calculating unit 13 for calculating a learning item required to correct the second processing value so as to be close to the first processing value, based on the processing information; for storing the learning item by the learning item The learning item of the learning item Z calculated by the calculating unit 13 The third processing value is corrected by the learning item Z memorized by the learning item storage unit 3, and the correction unit 14 for correcting the board width value (corrected processing value) is generated according to the processing information; The first processing value before the time when the abnormality detecting unit 12 detects the abnormality and the second processing value after the time when the abnormality detecting unit 12 detects the abnormality are selected; and the selecting unit is selected by the selecting unit 15 The selected machine value and the corrected machining value are 15 machine control units 16 for controlling the rolling line. Therefore, even in the case where an abnormality has occurred in the multi-measurement detector 123 (first measuring section), the control of the hot rolling apparatus 100 can be appropriately continued without a sudden change in the measured value.

Further, in the control device 1 according to the embodiment of the present invention, a new learning item is calculated by the exponential smoothing method, but the present invention is not limited thereto.

For example, a layer learning method in which a target plate thickness, a target plate width, an alloy type, and the like are used as a layer key, or a neural network with the same kind of measurement value and difference δ as teaching information. Learning methods can be used.

Further, in the control device 1 according to the embodiment of the present invention, the multi-measurement detector 123 is used as the first measurement unit, and the flatness meter 127 is used as the second measurement unit, but the invention is not limited thereto.

For example, the flatness meter 127 may be used as the first measuring portion, and the multi-measurement detector 123 may be used as the second measuring portion, or the flatness meter 127 may be used as the first measuring portion, and the winder inlet side plate may be used. The width gauge 133 is used as the second measuring section.

Further, the measured processing value is not limited to the plate width, and may be measured by the rough rolling exit side thermometer 111, the finish rolling inlet side thermometer 113, the finishing rolling exit side thermometer 125, or the coiler inlet side thermometer 131. The temperature is used as the processing value, and the sheet thickness value measured by the finish rolling outlet side thickness gauge 121 may be used as the processing value.

That is, the first measuring unit and the second measuring unit are provided on the hot rolling apparatus 100 (rolling line) as long as it is a measuring instrument for measuring the same kind of processing value.

Further, in the control device 1 according to the embodiment of the present invention, the difference in the board width value measured by the multi-sensor 123 and the flatness meter 127 at any time point is calculated, but the present invention is not limited thereto.

For example, the difference between the average value of the plate width values measured by the multi-measurement detector 123 and the average value of the plate width values measured by the flatness meter 127 may be calculated. Further, a method in which two thermometers are provided and the temperature difference measured by the two thermometers at the same position with respect to the positional relationship of the rolled material 200 may be used.

Fig. 7 is a view schematically showing a hot rolling apparatus provided with two thermometers.

As shown in Fig. 7, the first finish rolling outlet side thermometer 140 and the second finishing rolling exit side thermometer 141 are provided.

Next, the learning item calculation unit 17 measures each of the positions measured by the first finishing pass side thermometer 140 and the second finishing pass side thermometer 141 at the same position with respect to the positional relationship with respect to the material to be rolled 200. The thermometer calculates the difference between the two. For example, the learning item calculating unit 17 calculates the difference based on the temperature at the point where the predetermined distance S is applied to the rolled material 200 from the leading end distance of the rolled material 200 in accordance with the transfer speed of the rolled material 200.

Next, the learning item calculation unit 13 may calculate the learning item Z required to correct the temperature measured by the second finishing exit side thermometer 141 based on the calculated difference value.

Further, in the control device 1 according to the embodiment of the present invention, the difference between the plate width values measured by the multi-sensor 123 and the flatness meter 127 is calculated, but the present invention is not limited thereto, and is calculated to be calculated. The ratio can also be used. Specifically, the learning item calculating unit 13 uses the following formula based on the board width value B ₁ measured by the multi-sensor 123 and the board width value B ₂ measured by the flatness meter 127. 4) Calculate the ratio ψ.

Φ = B ₁ / B ₂ (Formula 4)

Next, in the case where the ratio ψ is calculated, the learned item calculating unit 13 calculates the calculated ratio ψ using the following (Formula 5), which is calculated by the exponential smoothing method at the time of the previous rolling. The learning item Z is smoothed to calculate a new learning item Z _n . Further, in Equation 5, the learning item Z _{n-1 is indicated} as the learning item calculated at the time of the previous rolling, and Zn is indicated as the learning item calculated at the time of the current rolling. .

Z _n =(1-β)‧ Z _{n -1} +β‧ Φ (Equation 5)

Further, the correction unit 14 of the control unit 4 uses the plate width value B ₂ measured by the flatness meter 127 by using the following formula 6 based on the machining information stored in the machining information storage unit 2 The learning item Z memorized by the learning item storage unit 3 is corrected to generate a corrected width value B ₂ ^COMP belonging to the corrected machining value.

B ₂ ^comp = B ₂ × Z (Equation 6)

(industrial availability)

As described above, the control device and the control method of the present invention are applicable to a control device and a control method for controlling a hot rolling device for rolling a rolled material.

1. . . Control device

2. . . Processing information memory

3. . . Learning item memory

4. . . Control department

5. . . Actual performance correction processing information

11. . . Processing Information Memory Control Department

12. . . Anomaly detection department

13. . . Learning item calculation department

14. . . Correction department

15. . . Selection department

16. . . Machine control department

17. . . Learning item calculation department

100. . . Hot rolling device

101. . . Heating furnace

103. . . Preliminary descaling machine

105. . . Rough trimming machine

107. . . Rough mill

109. . . Rough rolling exit side panel width

111. . . Rough rolling outlet side thermometer

113. . . Finishing inlet side thermometer

115. . . Plate end shear

117. . . Secondary descaling machine

119. . . Finishing mill

121. . . Finished rolling side thickness gauge

123. . . Multi-measurement detector

125. . . Finishing exit side thermometer

127. . . Flatness meter

129. . . Discharge spray cooling unit

131. . . Coiler inlet side thermometer

133. . . Coiler inlet side panel width gauge

135. . . Coiler

140. . . First finishing exit side thermometer

141. . . Second finishing exit side thermometer

200. . . Rolled material

201. . . Measuring time t

202. . . First processing value

203. . . Second processing value

204. . . error code

601, 602. . . Board width value

603. . . Corrected board width

Fig. 1 is a view showing the configuration of a hot rolling mill controlled by a control device according to an embodiment of the present invention.

Fig. 2 is a view showing the functional configuration of a control device according to an embodiment of the present invention.

Fig. 3 is a view showing an example of processing information of the processing information storage unit included in the control device according to the embodiment of the present invention.

Fig. 4 is a view showing an example of a learning item stored in the learning item memory unit included in the control device according to the embodiment of the present invention.

Fig. 5 is a flow chart showing the processing procedure of the control device according to an embodiment of the present invention.

Fig. 6 is a view for explaining the processing information stored in the processing information storage unit and the actual performance correction processing information stored in the actual performance correction processing information storage unit in the control device according to the embodiment of the present invention.

Fig. 7 is a view schematically showing a hot rolling apparatus equipped with two thermometers controlled by a control device according to an embodiment of the present invention.

1. . . Control device

2. . . Processing information memory

3. . . Learning item memory

4. . . Control department

5. . . Actual performance correction processing information

11. . . Processing Information Memory Control Department

12. . . Anomaly detection department

13. . . Learning item calculation department

14. . . Correction department

15. . . Selection department

16. . . Machine control department

100. . . Hot rolling device

123. . . Multi-measurement detector

127. . . Flatness meter

Claims (8)

A control device is provided with: a first measuring unit that measures a processing value of a rolling line for rolling a rolled material as a first processing value; and a second measuring unit for The processing value of the same type of the first processing value of the rolling line is measured as the second processing value; the abnormality detecting unit is configured to detect the abnormality of the first measuring unit; and the processing information storage unit is configured to process the first processing value, The second processing value, the measurement time point information for displaying the time point of measuring the first processing value and the second processing value, and the abnormality for displaying the time point at which the abnormality is detected by the abnormality detecting unit The detection time point information is associated and stored as processing information; the learning item calculation unit calculates a learning item for correcting the second processing value in a manner close to the first processing value according to the processing information; a term storage unit for memorizing the learning item calculated by the learning item calculating unit; the correcting unit, according to the processing information, the second processing value to be learned by the foregoing The learning item stored in the memory unit is corrected to generate a corrected machining value, and the selection unit selects the first machining value before the time point when the abnormality detecting unit detects the abnormality based on the machining information, and The abnormality detecting unit detects the corrected machining value after the abnormal time point; and the machine control unit controls the rolling line based on the machining value and the corrected machining value selected by the selection unit. The control device according to claim 1, wherein the learning item calculation unit calculates a difference between the first processed value and the second processed value based on processing information stored in the processed value storage unit, and is based on The difference calculated above and the learning item stored in the previous rolling of the learning item storage unit, the new learning item is calculated by the exponential smoothing method, and the calculated new learning item memory is calculated. In the aforementioned learning item memory. The control device according to claim 1, wherein the abnormality detecting unit calculates a standard deviation of the first processing value, and determines that the standard deviation is greater than a predetermined range or zero. The first measuring unit generates an abnormality. The control device according to any one of claims 1 to 3, wherein the learning item calculation unit is configured to be opposite to the aforementioned roller by the first measuring portion and the second measuring portion. The positional relationship of the rolled material is a difference between the first processed value and the second processed value measured at approximately the same place, and a learning term for correcting the second processed value so as to be close to the first processed value is calculated. A control method has the following steps: a first measuring step of measuring a processing value of a rolling line that is rolled by a rolled material as a first processing value; and a second measuring step, which is performed with the aforementioned roller The processing value of the same type of the first processing value of the rolling line is measured as the second processing value; the abnormality detecting step is for detecting the abnormality of the first measuring step; and the processing information memory step is to process the first processing value, The second processing value, the measurement time point information for displaying the time point of measuring the first processing value and the second processing value, and the abnormality of the time point for detecting the abnormality detected by the abnormality detecting step The detection time point information is associated and stored as processing information in the processing information memory unit; the learning item calculation step is calculated according to the processing information, and the second processing value is corrected to be close to the first processing value. a learning item; a learning item memory step, wherein the learning item calculated by the foregoing learning item calculating step is memorized in the learning item memory unit; And, according to the processing information, correcting the second processing value by the learning item memorized by the learning item memory step, thereby generating a corrected processing value; and selecting a step of selecting the abnormality detecting step according to the processing information. a first processing value before a time point at which an abnormality is detected, and a corrected machining value after a time point at which an abnormality is detected by the abnormality detecting step; and a machine control step based on a machining value selected by the selecting step And correcting the machining value to control the aforementioned rolling line. The control method according to claim 5, wherein the learning item calculation step calculates a difference between the first processing value and the second processing value based on processing information stored in the processing value memory unit, and Calculating the new aforementioned learning item by the exponential smoothing method according to the aforementioned calculated difference and the aforementioned learning item stored in the above-mentioned rolling of the learning item memory unit, and calculating the new learning as described above. The item is stored in the learning item memory section. The control method according to claim 5, wherein the abnormality detecting step calculates a standard deviation of the first processing value, and determines that the standard deviation is greater than a predetermined range or zero. The first measuring unit generates an abnormality. The control method according to any one of claims 5 to 7, wherein the learning item calculation step is based on the first measurement step and the second measurement step, respectively Learning the difference between the first processed value and the second processed value measured by the positional relationship of the rolled material at approximately the same position, and learning to correct the second processed value so as to be close to the first processed value item.