JPH06331345A - Strip-shaped body shape measuring instrument - Google Patents

Abstract

PURPOSE:To measure the displacement in vertical direction of an edge more reliably even if a running strip-shaped body zigzags or its width dimension fluctuates. CONSTITUTION:A strip-shaped body is displaced also in vertical direction as shown by symbols 1 and 1a. A first edge position detector 12a and a second edge position detector 12b are arranged for the left side edge of a strip-shaped body 1. The measured value of a first edge position detector 12a becomes X1a for the strip-shaped body 1a of a position X1 in width direction. The measured value of a second edge position detector 12b becomes X1b. The displacement in vertical direction for the strip-shaped body 1 of the strip-shaped body 1a can be obtained according to the measured values X1a and X1b and the comparison difference.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention measures displacements .DELTA.Z1 to .DELTA.Zn in the vertical direction with respect to the upper surface of a belt-shaped body during traveling at a plurality of positions in the width direction, and based on these measured values. The present invention relates to a band shape measuring device for measuring the flatness of the band, and in particular, even if the band meanders or the width of the band fluctuates, the edge of the band does not change. Or a displacement ΔZi (one of ΔZ1 to ΔZn above) in the vertical direction with respect to the upper surface of a certain portion near the edge.
The present invention relates to a belt shape measuring device capable of more reliably measuring (1).

[0002]

2. Description of the Related Art For example, in a hot or cold continuous rolling mill for a steel sheet or the like, a strip-shaped material to be rolled must be rolled so as to have a flat shape. For example, during continuous rolling, the shape may be distorted due to the difference in rolling conditions between the central portion and the edge portion in the width direction of the material to be rolled.
For example, there is so-called "belly stretch" in which the central portion of the rolled material is stretched as compared with the edge portion due to the difference in the rolling condition in the width direction of the rolled material. On the contrary, there is a so-called “ear extension” in which the edge portion is extended.

Conventionally, in order to remove the distortion of the shape of the material to be rolled which occurs during such continuous rolling, the rolls are changed and the shape is corrected while the rolling roll is cooled. Is being done. In order to remove such distortion of the shape of the material to be rolled, it is necessary to measure the flatness of the material to be rolled.

Further, in handling not only such a continuously rolled steel plate or the like but also a roll paper for printing or various films, it is necessary to measure the flatness thereof. In addition, various techniques for measuring the flatness of such a band have been disclosed. There is also such a technique that the flatness of the strip is measured in a non-contact manner.

For example, Japanese Patent Application Laid-Open No. 57-64103 discloses a technique for measuring the flatness of a running steel plate in a rolling mill while providing three or more displacement gauges in the width direction of the running steel plate. . This is because the output of each displacement meter has the direct current component removed.
From the output of each displacement meter from which such DC component is removed,
First obtain the average value of each. Also, the product of the output of each displacement meter from which the DC component has been removed and the difference between the respective corresponding average values is obtained. Further, the AC component of this product is removed and the DC component is squared to obtain a DC voltage proportional to the plate wave height. Conventionally, the flatness meter that measures the flatness of a steel sheet has only measured the difference in elongation and the steepness. According to the technique disclosed in JP-A-57-64103, it is possible to more easily recognize the size of the plate wave height itself specified in JIS.

FIG. 4 is a distance meter layout of a conventional belt flatness measuring apparatus.

As shown in FIG. 4, the above-mentioned Japanese Patent Laid-Open No.
General strip flatness measuring devices such as 7-64103 are
The range finder 16 is arranged at each of a plurality of positions in the width direction of the strip 1 to be measured. In FIG. 4, a total of three distance meters 16 are arranged. These rangefinders 16 measure displacements ΔZ1 to ΔZ3 in the direction perpendicular to the upper surface of the strip 1 respectively. Further, the flatness of the strip 1 is obtained based on the vertical displacements ΔZ1 to ΔZ3 thus obtained.

On the other hand, in hot or cold continuous rolling of a steel sheet or the like, it is also important to measure the width dimension of a strip-shaped material such as a material to be rolled. The measured width dimension is used not only for quality control of the band-shaped body of the manufactured product but also for controlling the manufacturing apparatus. For example, in a hot continuous rolling mill such as a steel plate or a cold continuous rolling mill, the measured value of the width dimension of the material to be rolled may be used for controlling the rolling load and the like.

FIG. 5 is a layout view of the position detector 12 of the conventionally used strip width measuring device.

In FIG. 5, position detectors 12 are arranged to measure the position of the left edge and the position of the right edge of the strip 1. That is, one of the position detectors 12 is arranged on the edge portion side on the left side in FIG. Further, the other position detector 12 is arranged on the edge portion on the right side in FIG. 5 of the strip 1. In addition, the strip 1
A light source 14 is arranged at a position facing the position detector 12 via. By illuminating from the back of the strip 1 with the light source 14, the position detector 12
The edge of the strip 1 can be detected more clearly. These position detectors 12 are specifically CCD (ch
ITV (industry using an arge coupled device) sensor
rial television) cameras etc. are used.

According to the band width measuring device as shown in FIG. 5, the edge position X1 measured by the position detector 12 on one side and the edge position X1 measured by the position detector 12 on the other side. Based on the edge position X2, the strip 1
Can be obtained. Further, not only the width dimension as described above, but also the meandering of the strip 1 can be detected.

[0012]

However, in the conventional strip flatness measuring apparatus such as the one described above with reference to FIG. 4, when the strip to be measured has meandered, The positional relationship between the distance meter 16 to be used and the belt-shaped body 1 was deviated. For this reason, there has been a problem in terms of the accuracy of measuring the flatness of the strip 1. For example, in the rangefinder 16 at the edge shown in FIG. 4, the vertical displacements ΔZ1 and ΔZ3 of the strip 1 cannot be measured due to the large meandering of the strip 1.

Further, the conventional strip flatness measuring device such as the one described with reference to FIG. 4 and the conventional strip width measuring device such as the one described with reference to FIG. 5 may be used together. However, there is a problem in that the installation area increases. In addition, there is a problem that equipment cost also increases.

The present invention has been made to solve the above-mentioned conventional problems, and even if the running belt meanders or the width dimension of the running belt fluctuates, It is an object of the present invention to provide a belt shape measuring apparatus capable of more reliably measuring the displacement of an edge of a belt or a fixed portion near the edge in the direction perpendicular to the upper surface thereof.

Further, a strip shape measuring device capable of performing the strip flatness measurement as described above and the strip width dimension measurement as described above while suppressing an increase in installation area and an increase in equipment cost. The second purpose is to provide

[0016]

According to the present invention, the displacements ΔZ1 to ΔZn in the direction perpendicular to the upper surface of the belt-like body are measured at a plurality of positions in the width direction of the belt-like body during traveling, and these measured values are measured. In a strip shape measuring device for measuring the flatness of the strip based on, a first edge position detection arranged at one edge of the strip for measuring the edge position in the width direction of the strip. And an edge portion on which the first edge position detector is arranged are offset from the arrangement position of the first edge position detector so as to have a mutual interval C at least in the width direction of the strip. A second position measuring device for measuring the edge position of the strip in the width direction
According to the edge position detector, the first edge position measurement value X1a of the measurement result by the first edge position detector, the second edge position measurement value X1b of the measurement result by the second edge position detector, and the mutual interval C. , The vertical displacement ΔZi of an edge of the strip or a fixed portion near the edge
The above-mentioned problem is achieved by including an edge position calculation unit for obtaining

Further, in the band shape measuring apparatus, the edge position calculation unit obtains the vertical displacement ΔZi, and the edge direction in the width direction of the band is taken into consideration while considering the vertical displacement ΔZi. Width direction position X1
Is obtained according to the first edge position measurement value X1a and the second edge position measurement value X1b, thereby achieving the above-mentioned object and further suppressing an increase in installation area and an increase in equipment cost. However, it is possible to measure the flatness of the strip and the width of the strip as described above.

Further, in the above-mentioned strip shape measuring apparatus, the first edge position detector and the second edge are located on the substantially same plane whose distance interval is parallel to L with respect to the upper surface of the strip. A position detector is arranged at the mutual interval C, and the edge position calculation unit uses the distance interval L and the mutual interval C together with the first edge position measurement value X1a and the second edge position measurement value X1b. The above problem is achieved by obtaining the vertical displacement .DELTA.Zi by the above calculation.

[0019]

According to the present invention, in measuring the flatness of the band-shaped body or the like, in order to more accurately measure the displacement of the band-shaped body in the direction perpendicular to the edge or the upper surface of the band-shaped body in the vicinity of the edge, the conventional method is used. It was made by finding a structure that does not exist. That is, in the present invention, in order to measure such vertical displacement, at least two position detectors are provided for one edge of the strip. The position detector detects the edge position of the strip in the width direction like the one using the ITV camera as described above.

FIG. 1 is a side view showing the gist of the present invention.

In FIG. 1, a total of two position detectors 12a and 12b are arranged on one edge of the strip 1. Of these position detectors 12a and 12b, the reference numeral 12a is particularly referred to as a first edge position detector. On the other hand, the reference numeral 12b is referred to as a second edge position detector. The second edge position detector 12b is arranged at a position offset with respect to the arrangement position of the first edge position detector 12a in the width direction of the strip 1 so as to have a mutual interval C therebetween.

It should be noted that the strip 1a is different from the strip 1 described above.
The positions in the width direction are the same, and only the positions in the vertical direction are displaced. The running belt is displaced in the vertical direction as indicated by reference numerals 1 and 1a.

In FIG. 1, although the position of the strip 1a (the position of one edge thereof) is the same as the position of the strip 1 (the position of one edge thereof),
Both of the first edge position detector 12a and the second edge position detector 12b have detected different edge positions.

For example, the position of one edge of the strip 1 is X1 as shown in FIG. At this time, the position of the strip 1a is detected by the first edge position detector 12a as the first edge position measurement value X1a. On the other hand, the edge position of the strip 1a has been detected as the second edge position measurement value X1b by the second edge position detector 12b.

Thus, although the edge position of the strip 1a is the same as the edge position of the strip 1,
The difference is detected because the strip 1a is displaced with respect to the strip 1 in the direction perpendicular to the upper surface thereof. Further, the magnitude of the difference between the first edge position measurement value X1a and the second edge position measurement value X1b and the magnitude of the vertical displacement of the strip 1a with respect to the strip 1 are closely related to each other. There is a strong correlation. The present invention has been made paying attention to this point.

That is, according to the present invention, as described above, at least two position detectors 12a arranged at the mutual interval C are provided.
And 12b are used to detect the vertical displacement of the strip 1 with respect to its upper surface.

According to the strip shape measuring apparatus of the present invention as described above, the strip 1 is meandered or the width dimension of the strip 1 is varied, so that the edge position is wide. Even if it moves in the direction, it is possible to more reliably measure the displacement in the vertical direction with respect to the upper surface at the edge of the strip or at a fixed position near the edge. This is because the vertical displacement obtained by the present invention, which is obtained from the first edge position measurement value X1a and the second edge position measurement value X1b, is always the vertical displacement at the target edge. Is. Alternatively, it is also possible to set a fixed portion near the edge with the edge as a reference.

Although the present invention is not limited to this, in the first edge position detector 12a and the second edge position detector 12b shown in FIG. 1, the strip 1 or 1a is used. You may make it detect the edge position of that width direction.

At this time, the accuracy of measuring the position of the edge in the width direction can be further improved by considering the displacement in the vertical direction.

Further, when the edge position in the width direction of the strip 1 is also detected as described above, the position detector is also used for detecting the edge position as described above. It is possible to further suppress the increase in installation area and the increase in equipment cost.

According to the present invention, the first edge position detector 12a and the second edge position detector 12b are arranged only for one edge of the running strip 1 or 1a. It is not limited. For example, as in the embodiment described later, it may be arranged on both edges of the strip 1 or 1a. That is,
The first edge position detector 12a and the second edge position detector 12b are arranged at each edge.

[0032]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a sectional view of a strip shape measuring apparatus to which the present invention is applied.

In FIG. 2, the strip 1 is running from the front side to the other side. The left end and the right end of the strip 1 in FIG. 2 are edges in the width direction of the strip 1. In FIG. 2, the left side is the operator side and the right side is the drive side.

The strip shape measuring apparatus 10 shown in FIG. 2 mainly comprises a total of two first edge detectors 12a and a total of two second edge position detectors 12b.
The light source 14, the range finder 16, and the frame 22. Further, a predetermined edge position calculation unit is provided in the frame 22.

The first edge position detector 12a and the second edge position detector 12b are ITV cameras using linear CCD sensors arranged in the same direction as the width direction of the strip 1. . Further, the first edge position detector 12a and the second edge position detector 12b
Outputs a signal according to the distance from the center to the image of the edge of the strip 1 in each image range. The distance of the position of the edge indicated by the signal is based on the strip 1 at the specified position described later with reference to FIG.

The first edge position detector 12a and the second edge position detector 12b are not limited to those in which the CCD sensors are arranged linearly, that is, one-dimensionally as described above. . For example, it goes without saying that the CCD sensors may be arranged in a frame shape, that is, in a two-dimensional manner.

The edge position calculator calculates the first edge position measurement values X1a and X2a, which are the measurement results obtained by a total of two first edge position detectors 12a, and the second edge position measurement values.
The vertical displacement ΔZ1 of the operator side edge and the vertical displacement ΔZ3 of the drive side are obtained according to the second edge position measurement values X1b and X2b of the measurement result obtained by the edge position detector 12b.

The first edge position measurement value X1a and the second edge position measurement value X1b relate to the operator side edge. On the other hand, the first edge position measurement value X2a and the second edge position measurement value X2b
Relates to the drive side edge.

Further, the edge position calculating section calculates the edge width direction position X1 and the edge width direction position of the strip 1 according to the first edge position measurement values X1a and X2a and the second edge position measurement values X1b and X2b. The position X2 is calculated. The edge width direction position X1 is a position of the edge on the operator side in the width direction of the strip 1. on the other hand,
The edge width direction position X2 is a position of the edge on the drive side in the width direction of the strip 1. Further, the band shape measuring device 10 obtains the width dimension of the band 1 based on the edge direction positions X1 and X2.

As described above, when determining the positions X1 and X2 in the edge width direction, the vertical displacements ΔZ1 to ΔZ3 determined by the belt shape measuring apparatus 10 are taken into consideration. Thereby, the positions X1 and X2 in the edge width direction are obtained.
Alternatively, it is possible to further improve the measurement accuracy of the width dimension of the strip 1 obtained based on the edge width direction positions X1 and X2.

FIG. 3 is a side view showing the measuring principle in this embodiment.

FIG. 3 shows the vicinity of the edge of the strip 1 on the operator side, in particular, of the present embodiment shown in FIG.

In FIG. 3, the first edge position detector 12a and the first edge position detector 12a are arranged on the substantially same plane parallel to the upper surface of the belt-shaped body 1 or 1a at a distance L or L '. The second edge position detector 12b is arranged. Also, these first edge position detectors 12a
The second edge position detector 12b and the second edge position detector 12b are arranged at positions offset from each other so as to have a mutual interval C in the width direction.

The band-shaped body indicated by reference numeral 1 is in a fixed position. On the other hand, the strip shown by reference numeral 1a is at a certain measurement position. These strip 1 and strip 1
The interval with a is ΔZ1 at the left edge.

First, in the belt-shaped body 1 at the specified position, the edge position on the operator side is measured by the first edge position detector 12a. The measured value at this time is X1. At this time, the measured value by the second edge position detector 12b is (C-X1).

On the other hand, for the strip 1a having the vertical displacement ΔZ1, the first edge position measuring device 12a is used.
The measured value by X1a is X1a. At this time, the measured value of the second edge position detector 12b becomes X1b. The measured values X1a and X1b are different from the measured value X1. This is because the band-shaped body 1 and the band-shaped body 1a are at different positions in the vertical direction even though the positions of the edges in the width direction are the same. This is also because the first edge position detector 12a and the second edge position detector 12b are arranged so as to have a mutual spacing C.

Here, the following proportional equation is established by the similarity relationship of the triangles, that is, the similarity relationship between the triangles relating to the strip 1 and the triangles relating to the strip 1a.

L: L '= X1a: X1 (1) L: L' = X1b: (C-X1) (2)

The following equations hold for L and L '.

ΔZ1 = L−L ′ (3)

From the equations (1) and (2), the position X1 in the width direction of the edge, that is, the actual position in the width direction of the edge of the strip 1 and the edge of the strip 1a is expressed by the following equation. Can be asked.

X1 = (X1a × C) / (X1b + X1a) (4)

According to the equation (4), the measured value X1a by the first edge position detector 12a, the measured value X1b by the second edge position detector 12b, and the mutual interval C The width direction position X1 can be obtained.

Further, the distance L'to the band-shaped body 1a can be obtained from the equations (1) and (4).

L ′ = (L × X1) / X1a = (L × C) / (X1b + X1a) (5)

That is, according to the equation (5), the measured value X1a by the first edge position detector 12a and the second edge position detector 12a
The distance L'can be obtained based on the measured value X1b of the edge position detector 12b, the mutual distance C and the distance distance L. The vertical displacement ΔZ1 can be calculated based on the equation (5) and the equation (3).

As described above with reference to FIG. 3, the width direction position X1 of the edge on the operator side can be obtained. In particular, according to this embodiment, the width direction position X1 can be obtained while reducing the influence of the vertical displacement ΔZ1. Also, the vertical displacement ΔZ1
Also, with respect to, it is possible to measure the actual edge position of the strip 1 or 1a. For example, even if the strip 1 or 1a meanders or the width of the strip changes, the vertical displacement ΔZ1 at the edge of the strip can be obtained.

The above description using FIG. 3 relates to the edge on the operator side. However, it goes without saying that the edge on the drive side can be similarly obtained.

Further, the displacement ΔZ1 in the vertical direction with respect to the edge on the operator side and the displacement ΔZ3 in the vertical direction with respect to the edge on the drive side are obtained, and the distance meter 16 is also provided.
The flatness of the strip 1 can be measured based on the displacement ΔZ2 in the vertical direction measured by.
For example, the vertical displacement Δ obtained in this way
Z1 to ΔZ3 are used, for example, as described in JP-A-57-6410.
3 can be applied to measure the flatness of the strip 1.

As described above, according to the present embodiment, even if the strip 1 meanders or the width of the strip 1 fluctuates, the edge on the operator side and the drive side are not changed. It is possible to measure the position X1 or X2 in the width direction and the vertical displacements .DELTA.Z1 and .DELTA.Z3 of the edge of the.

Further, the first edge position detector 12a and the second edge position detector 12b are commonly used for the strip flatness measurement and the strip width measurement. Therefore, the installation area can be further reduced, and
It is possible to further reduce the equipment cost.

As described above, with respect to the edge on the operator side and the edge on the drive side, the position in the width direction and the vertical displacement thereof can be obtained more accurately. Therefore, by measuring the distance between these edges with a non-contact distance meter such as a laser distance meter and integrating the distance, the actual length of the strip 1 in the width direction, that is, the width of the strip 1 is measured. The actual width dimension along the shape of the direction can be measured.

[0064]

As described above, according to the present invention, even if the running strip meanders or the width dimension of the strip changes, the edge or the edge of the strip is changed. It is possible to obtain an excellent effect that the displacement in the vertical direction with respect to the upper surface of a certain fixed portion in the vicinity can be measured more reliably.

Further, when the present invention is applied so that the width dimension of the band can be measured while sharing some of its constituent elements, the increase of the installation area and the increase of the equipment cost can be further suppressed. It is possible to obtain the excellent effect that the flatness measurement of the strip and the width measurement of the strip as described above can be performed together.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of the vicinity of an edge of a belt shape measuring device showing the gist of the present invention.

FIG. 2 is a sectional view of a strip shape measuring apparatus according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of the vicinity of an operator-side edge of a strip to be measured in the above-described embodiment.

FIG. 4 is a side view showing the arrangement of a range finder of a strip flatness measuring device that has been conventionally used.

FIG. 5 is a side view showing an arrangement of position detectors of a strip width measuring device that has been conventionally used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Band-shaped object (at a specified position) 1a ... Band-shaped object (at a certain measurement position) 10 ... Band-shaped object shape measuring device 12 ... Position detector 12a ... First edge position detector 12b ... Second edge position detection Container 14 ... Light source 16 ... Distance meter 22 ... Frame C ... Mutual interval L, L '... Distance interval X1, X2 ... Edge width direction position X1a ... First edge position measurement value X1b ... Second edge position measurement value ΔZ1 ... Edge vertical Directional displacement

Front page continuation (72) Inventor Hideyuki Yuzawa, 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Inside the Chiba Steel Works (72) Inventor Seiji Kitao 1 Kawasaki-cho, Chuo-ku, Chiba, Chiba Prefecture Kawasaki Steel Co., Ltd. Company Chiba Steel Works

Claims (3)

[Claims] 1. At a plurality of positions in the width direction of a running belt,
Displacements ΔZ1 to ΔZn in the direction perpendicular to the upper surface of the strip.
Respectively, in the strip shape measuring device for measuring the flatness of the strip based on these measured values, the edge position in the width direction of the strip, which is arranged at one edge portion of the strip. A first edge position detector for measuring, and the edge portion in which the first edge position detector is arranged,
The edge position in the width direction of the band-shaped body, which is arranged at a position offset to the mutual position C in at least the width direction of the band-shaped body with respect to the arrangement position of the first edge position detector, is measured. A second edge position detector, a first edge position measurement value X1a as a measurement result by the first edge position detector, a second edge position measurement value X1b as a measurement result by the second edge position detector, and a mutual interval C. And an edge position calculation unit for obtaining the vertical displacement ΔZi at an edge of the band or at a fixed position near the edge. 2. The edge position calculation unit according to claim 1, wherein the edge position calculation unit obtains the vertical displacement .DELTA.Zi and, in consideration of the vertical displacement .DELTA.Zi, the widthwise position of the edge in the width direction of the strip. X1 is the first edge position measurement value X1a and the second edge position measurement value X1b
A strip shape measuring apparatus characterized by being obtained according to. 3. The first edge position detector according to claim 1, wherein the first edge position detector is arranged on the substantially same plane with a distance L parallel to the upper surface of the strip. And the second edge position detector are arranged at the mutual interval C, and the edge position calculation unit sets the first edge position measurement value X.
1a and the second edge position measurement value X1b together with the distance interval L and the mutual interval C to calculate the vertical displacement .DELTA.Zi.