JPS6244204B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a planar shape measuring device for a traveling object,
In particular, the tip or tail end of a running body that has a concave irregularly shaped part (hereinafter referred to as a fishtail) or a convexly shaped part (hereinafter referred to as a tongue shape) at the leading end or tail end of a hot-worked steel plate, etc. The present invention relates to a planar shape measuring device for a traveling object that measures a planar shape.

Generally, when rolling a material to be rolled such as a steel plate, if the width of the material to be rolled is wide, a fish tail will occur at the tip or tail end, and if the width of the material to be rolled is narrow, a tongue shape will occur. do. These fish tails and tongue shapes become a problem when they get caught during further rolling in the next process, and ultimately become parts outside of the product, so they are removed by cutting using a cutting machine. There is. Therefore,
By improving the shape of these irregularly shaped portions and reducing the number of cut and removed portions as much as possible, the steel plate production yield can be improved.

Recently, in order to improve the shape of the irregularly shaped parts at the tip and tail end of the steel plate, while quantitatively detecting the shape of these irregularly shaped parts, the thickness reduction amount, width reduction amount, and A rolling method for suppressing the occurrence of irregularly shaped portions has been experimentally established by controlling the rolling speed and the like to suppress the shapes of the tip and tail portions from becoming fishtail-like or tongue-like.

However, in actual continuous rolling lines, a device and method for quantitatively detecting the shape of the tip and tail ends of such steel sheets has not yet been established, so the above-mentioned rolling method for suppressing the occurrence of irregularly shaped parts has not been established. The situation is that it is not effective. That is, the conventional steel plate edge shape detection device was an industrial television device shown in FIG. 1 or a one-dimensional scanning device shown in FIG. 2. The industrial television device shown in FIG. 1 images a moving steel plate 1 using an industrial television camera 2, and displays the image on a television monitor 3 at all times. Note that 20 is the field of view of the industrial television camera 2. However, in such a device, the timing at which the tip or tail end of the steel plate is imaged cannot be detected, and the image on the television monitor 3 cannot be quantitatively analyzed. It is difficult to use it as a rolling mill control signal. In addition, the one-dimensional scanning device shown in FIG.
A measuring roll 5 that rotates in contact with the steel plate 1 and a rotation amount signal generator 50 such as a tachometer generator connected to the measuring roll 5 are used. are placed on a continuous rolling line. The one-dimensional shape signal in the width direction of the steel plate output from the one-dimensional scanning detector 4 and the steel plate movement amount signal output from the rotation amount signal generator 50 are combined in the signal processing circuit 6 to generate a two-dimensional shape signal for the steel plate 1. (Plane) shape signal is obtained. This two-dimensional shape signal is stored in the planar shape memory device 7.
and is output to the planar shape monitor 8 as necessary. Here, since the two-dimensional shape signal stored in the planar shape memory device 7 is a digital signal, it can be quantitatively analyzed and used as a rolling mill control signal in the rolling method for suppressing the occurrence of irregularly shaped parts. has advantages.

However, in such a one-dimensional scanning device, since the amount of movement of the steel plate 1 is detected by the measuring roll 5 in contact with the steel plate 1, slips between the measuring roll 5 and the steel plate 1 and the measuring roll 5 itself may occur. There is a problem in that an error in detecting the amount of movement of the steel plate occurs due to wear and the like. As shown in FIG. 3, this steel plate movement detection error is caused by the distortion 9 in which the planar shape detection line 9 of the steel plate deviates back and forth in the steel plate traveling direction with respect to the true planar shape detection line 90 of the steel plate.
It appears as 1. In particular, in hot rolling lines, steel plates are sprayed with water to remove scale, so slippage of measuring rolls is likely to occur. When detecting the amount of movement of the steel plate, an error occurs due to slippage, etc. with a standard deviation of approximately 15 mm. In addition, when rolling mills are placed close to each other, there is a problem with the installation space in that it may not be possible to install measuring rolls on the exit and entry sides of the rolling mill, and the problem is that the measuring rolls may wear out. There is a problem in that manpower and time are required to replace the rolls.

The present invention has been made to solve the above-mentioned problems, and is capable of quantitatively detecting the two-dimensional planar shape of the end of a traveling body such as a steel plate with high accuracy.
It is an object of the present invention to provide a planar shape measuring device for a traveling body suitable for a rolling method for suppressing the occurrence of irregularly shaped parts.

In order to achieve the above object, the present invention provides a first method for detecting radiation emitted from a traveling body or radiation passing through the periphery of the traveling body using a plurality of photoelectric elements arranged in the width direction of the traveling body. a second detector that detects radiation emitted from the traveling body or radiation passing through the periphery of the traveling body using a plurality of photoelectric elements arranged in the traveling direction of the traveling body; The output signals of the respective photoelectric elements of the first detector are sequentially captured in accordance with the position data and timing of the photoelectric elements whose output signals of the second detector are sequentially inverted, and a signal processor that outputs as two-dimensional planar shape data;
It is characterized in that it contains.

An embodiment of the present invention will be described in detail below with reference to the drawings. As shown in FIG. 4, this embodiment includes a first detector 4, a second detector 10, a signal processor 11, a planar shape memory device 7, and a planar shape monitor 8. It is configured.

The first detector 4 and the second detector 10 each include a large-scale photoelectric conversion element in which a large number of photoelectric conversion elements such as CCDs as photoelectric elements are arranged adjacent to each other in a straight line. And the first detector 4 is
The second detector 10 is arranged so that its field of view 40 faces in the width direction of the traveling object such as the steel plate 1, and the second detector 10 is arranged so that its field of view 100 faces in the traveling direction of the traveling object such as the steel plate 1. Therefore, the first detector 4
The second detector 1 detects the one-dimensional shape of
0 detects the one-dimensional shape of the steel plate 1 in the running direction. In addition, in detecting the one-dimensional shape of the steel plate 1, if the steel plate 1 is a hot steel plate, radiation such as infrared rays emitted from the steel plate is detected, and the one-dimensional shape of the steel plate 1 is detected.
When the steel plate is a cold-worked steel plate, a light source is placed below the steel plate to detect radiation such as light rays passing through the periphery of the steel plate. Note that the first detector 4 and the second detector 10 have their fields of view 40 and 100
Any device may be used as long as it can detect that a part of the steel plate 1 has entered the interior as an on/off signal, and it may be one that uses a scanning method or one that uses an imaging method that simultaneously images the entire field of view.

Signals output from the first detector 4 and the second detector 10 are input to a signal processor 11.
The signal processor 11 obtains a two-dimensional shape signal of the steel plate 1 based on the signals from the first detector 4 and the second detector 10. The output of this signal processor 11 is input to a planar shape storage device 7 having a grid-like storage area, and the information stored in the planar shape storage device 7 is displayed as an image on a planar shape monitor 8 when necessary.

Next, the operation of this embodiment will be explained. In addition, in the following description, a case will be described in which infrared rays emitted from the steel plate 1 are detected by each detector. As shown in FIG. 5, when the steel plate 1 enters the field of view 40 of the first detector and the field of view 100 of the second detector, each detector detects infrared rays emitted from the steel plate 1 and outputs an on signal. is output, and a width direction one-dimensional shape signal 41 and a running direction one-dimensional shape signal 101 are output.
Output. That is, the large-scale photoelectric conversion element of the first detector 4 is composed of a group of n photoelectric conversion elements as shown in FIG. The element is composed of m photoelectric conversion element groups as shown in FIG. 6, so the Ni to Nj and Nk to Nl photoelectric conversion elements of the first detector are turned on, and the The Mh to Mmth photoelectric conversion elements of the second detector are turned on. Therefore, the one-dimensional shape in the width direction and the one-dimensional shape in the running direction of the steel plate 1 are detected as an on/off signal.

On the other hand, the planar shape memory device 7 is provided with a memory area 70 of m×n bits as shown in FIG. 7, and a two-dimensional shape of n rows and m columns can be formed by these memory areas. For example, when a width direction one-dimensional shape signal 41 and a running direction one-dimensional shape signal 101 as shown in FIG. The on-signal is taken in as data from the Mh-th photoelectric conversion element. continue,
Ni to Nj and Nk from the width direction one-dimensional shape signal 41
The on signal from the ~Nlth photoelectric conversion element is taken in as data. Next, the planar shape memory device 7
In the storage area 70, "1" is written in the Mhth column Ni to Nj rows and the Mhth column Nk to Nl rows, and "0" is written in the other rows of the Mhth column. This writing state is shown in FIG. In addition, in FIG. 7, in one writing process,
Only the write state of the Mh column is shown.

As the steel plate 1 travels, the ON signal output from the one-dimensional shape signal 101 in the traveling direction becomes Mm.
~ Mi, that is, as the steel plate 1 travels, the output signal of the photoelectric conversion element of the second detector 10 corresponding to the tip position is sequentially reversed from OFF to ON. The one-dimensional shape signal 101 is the position data of the tip of the steel plate 1, and by processing the ON signal of the width direction one-dimensional shape signal 41 in the same manner as above in accordance with the change timing of the ON signal, the steel plate One piece of planar shape data is digitally stored in the storage area 70 of the planar shape storage device 7 for each passing.

In Figs. 8a to 8e, the width direction 1 of the steel plate 1 having a fishtail-like irregularly shaped part at the tip thereof is shown.
Dimensional shape signal 41 and running direction one-dimensional shape signal 10
It showed a change of 1. Also, in Figures 9a to 9e,
The writing states of the storage area 70 corresponding to figures a to e are shown. In FIGS. 9a to 9e, 102 indicates data in which "1" is written among the data strings written at each processing timing, and 102 indicates data in which "1" is written.
3 indicates "1" data written and stored in the past.

By performing such a writing process, the end shape of the steel plate is reliably stored in the planar shape memory device 7 even if the ON signal is input at an arbitrary timing. In addition, although the description above has been made of a steel plate having an irregularly shaped part in the shape of a fishtail at the tip, it is possible to similarly detect a steel plate with an arbitrary shape at the tip, and the tail end also has a planar shape. can be memorized. Furthermore, in the case where a light source is placed below the steel plate and a light beam passing through the periphery of the steel plate is detected, the on/off signal is simply reversed to that described above, and the planar shape can be detected in the same manner.

FIG. 10 shows an example of application of the present invention in the case where a rolling method for suppressing the occurrence of irregularly shaped portions is carried out using a hot rolling rough rolling mill 30 equipped with edger rolls 32 for performing reverse rolling. As shown in the figure,
Two sets of the first detector 4 and the second detector 10 are arranged before and after the hot rolling rough rolling mill 30. Each detector is connected to a storage device 51 via a signal processor 11 and a planar shape storage device 7, respectively. Note that 8 is a planar monitor connected to the storage device 51. This storage device 51 extracts and stores the digital signals stored in the planar shape memory device 7 as needed.The signal from the storage device 51 allows the planar shape to be imaged on the planar shape monitor 8, or an appropriate Mill 3 by analysis
0. FIG. 11 shows an example of the display method of the planar shape monitor 8 in the application example, and shows the end planar shape 5 before the rolling operation.
2 and the end planar shape 53 after the rolling operation are displayed. By displaying in this manner, it is possible to easily confirm the end shape changed by rolling, and it can be effectively utilized for controlling the rolling mill.

FIG. 12 shows another example of application of the present invention in a continuous rolling line equipped with a rough mill group and a finishing mill group for continuous rolling. In FIG. 12, parts corresponding to those in FIG. 11 are designated by the same reference numerals, and their explanations will be omitted. In this application example, a first detector 4 is installed in the middle of each rolling mill, in front of the first stand 60, and behind the final stand 63.
and a second detector 10 are arranged.
According to this application example, the edge planar shape data output from each planar shape memory device 7 is taken in and stored in the storage device 51, and the rolling reduction setting for continuous rolling or the forward end of the first stand 60 is stored in the storage device 51. , analysis data for setting the cutting length of the cutting machine disposed behind the final stand 63 is provided. FIG. 13 shows an example in which the change in shape of one end of a steel plate during continuous rolling is displayed on the shape plane monitor 8 in this application example.

As explained above, according to the present invention, an excellent effect can be obtained in that the end shape of a traveling body such as a steel plate can be automatically and quantitatively detected with high accuracy. Therefore, the rolling method for suppressing the occurrence of irregular shapes, which has previously been experimentally or theoretically established but could not be implemented, is now possible, and the number of irregular shapes cut and removed at the edges is reduced, resulting in improved yields. improves.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams showing a conventional planar shape measuring device, FIG. 3 is a diagram for explaining the amount of distortion in the planar shape measuring device of FIG. 2, and FIG.
The figure is an explanatory diagram showing one embodiment of the present invention, FIG. 5 is a diagram showing the output state of one-dimensional shape signals in the width direction and running direction in the embodiment, and FIG. Diagrams showing further details, FIG. 7 is a diagram showing the storage area of the planar shape memory device, and FIGS. Diagrams showing one-dimensional shape signals in the running direction, Figures 9 a to e
are diagrams showing the memory states of the planar shape memory device corresponding to FIGS. 8a to 8e, FIG. 10 is a block diagram showing an application example of the present invention, and FIG. 11 is a diagram showing the planar shape monitor in the application example. A line diagram showing an example of a video of
FIG. 12 is a block diagram showing another application example of the present invention, and FIG. 13 is a line diagram showing an example of an image of a flat monitor in the application example. DESCRIPTION OF SYMBOLS 1... Steel plate, 4... First detector, 7... Planar shape memory device, 10... Second detector, 11... Signal processor, 41... Width direction one-dimensional shape signal, 101... Running direction one-dimensional shape signal .

Claims (1)

[Scope of Claims] 1. A first detector that detects radiation emitted from the traveling body or radiation passing through the periphery of the traveling body using a plurality of photoelectric elements arranged in the width direction of the traveling body; a second detector that detects radiation emitted from the traveling body or radiation passing through the periphery of the traveling body using a plurality of photoelectric elements arranged in the traveling direction of the traveling body; and the second detector The output signals of the respective photoelectric elements of the first detector are sequentially captured in accordance with the position data and timing of the photoelectric elements whose output signals are sequentially inverted, and the two-dimensional planar shape of the end of the traveling body is determined. A planar shape measuring device for a traveling body, comprising a signal processor that outputs data. 2. The plane of the traveling body according to claim 1, wherein the traveling body is a steel plate, and the first detector and the second detector are arranged before and after a rolling mill that rolls the steel plate. Shape measuring device.