JP2006125889A - Apparatus and program for detecting shape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To heighten precision in detecting the shape of plate-like members and highly precisely detect plate displacements of the plate-like shape in width directions, plate width, plate length, and the positions of plate end parts. <P>SOLUTION: On the basis of load from a plate-like member 1 detected by at least two adjacent load sensors E when the plate-like member 1 is brought into contact, with the load sensors E, with the surface of a sensor roller 4 of which the external peripheral surface is coated by a laminar member 12, which changes load to a peripheral part of local load, the shape of the plate-like member 1 is detected. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for detecting the shape of the plate-like member based on loads from the plate-like member detected by a plurality of load sensors appropriately disposed on the outer peripheral surface of the sensor roller along the rotation axis direction. The present invention relates to a shape detection device and a shape detection program capable of detecting the position of the end portion of the plate member in the rotation axis direction.

Conventionally, a shape detection device that detects the shape of a plate-like member such as a rolled material rolled by a rolling mill or the like is known. The shape detection device detects (calculates) the shape of the plate-like member based on a sensor roller having a plurality of load sensors arranged on the surface and an output signal of the load sensor corresponding to the load of the plate-like member. And a controller.
In the shape detection device, when detecting the shape of a certain plate-like member, the plate width of the plate-like member is input (registered) in advance, and the plate-like member is set at a predetermined centering position to detect the shape. Need to be sent to the device. In this shape detection device, the shape of the plate member is detected based on the input plate width and the centering position. However, the set position of the plate member is misaligned or conveyed to the shape detection device. When a plate shift (position shift in the plate width direction) or the like occurs in the plate member, the centering position and the actual plate member position are not aligned, so the shape of the plate member is accurately detected. There is a problem that it becomes impossible.
Further, when continuously detecting the shape of a rolled sheet rolled by a rolling mill, there is also a problem that the rolled sheet is caused to slip due to the influence of rolling oil or the like injected at the time of rolling, and sheet displacement is likely to occur.
Furthermore, depending on the rolling condition of the rolling mill, a rolled sheet rolled to a width different from the input sheet width may be conveyed, and in this case, the shape of the plate-shaped member cannot be detected accurately.
For this reason, conventionally, the above-described shape detection device is provided with the detection device described in Patent Document 1 (hereinafter referred to as the conventional device 1) for detecting the plate width and the plate displacement based on the image obtained from the CCD camera, and the eddy current. A detection device (hereinafter referred to as the conventional device 2) for detecting the plate width and the plate deviation is separately provided by using the device, and the shape detection device detects the plate width and the deviation amount detected by these detection devices. A method for correcting the shape error of the plate-like member is employed.
However, there is a problem that the detection device of the above-described conventional device 1 (Patent Document 1) based on the image of the CCD camera may malfunction depending on the environment such as fume. Also, there is a problem that the detection accuracy is lowered if the maintenance of the CCD camera or the lighting device is neglected.
In addition, when the detection device of the above-described conventional device 2 using eddy current is installed, the production line length is increased by several tens of centimeters, which may reduce the yield and deteriorate the production efficiency. , There is a problem that work efficiency is lowered because the feeding time (passing time) of the plate-like member becomes long.
Furthermore, in the conventional method for detecting the plate width and the plate shift, it is necessary to provide a new device such as the conventional device 1 or the conventional device 2 in addition to the shape detection device, which increases the cost. In addition, the peripheral equipment of the shape detection device is complicated and the equipment scale is increased.
JP 2000-42616 A

On the other hand, it is also possible to detect the plate width and the plate shift based on the sensor output of the load sensor arranged on the surface of the sensor roller without installing the conventional devices 1 and 2 described above. For example, it can detect by comparing the output value of the load sensor covered with the plate-like member and the output value of the load sensor not covered among the plurality of load sensors. However, since the load sensor is for detecting the shape of the plate-like member, there is a problem that the position of the plate end cannot be accurately detected depending on the shape of the plate-like member. Conventionally, there may be a region where the load from the plate-like member cannot be detected between the load sensors. In such a case, in the detection method, the load between the load sensors, that is, the load by the load sensor, may not be detected. Since the plate-like member is arranged in an area where the detection of this is impossible, there is also a problem that the detection error of the plate end portion (the maximum error due to the distance between the sensors) becomes so large that it cannot be ignored. These problems can be solved by providing a large number of load sensors so that the plate end always covers the two sensors and detecting the position of the plate end based on the two sensor outputs at the plate end. However, the number of sensors to be installed becomes enormous and not only is expensive in terms of cost, but also lacks practicality.
Accordingly, the present invention has been made in view of the above circumstances, and the object thereof is to increase the accuracy of detecting the shape of the plate-like member, and to detect the plate displacement in the width direction of the plate-like member and the plate width length. Another object of the present invention is to provide a shape detection device and a shape detection program that can detect the height and the position of the plate end portion with high accuracy.

In order to achieve the above object, the present invention provides a plate-like member that comes into contact with the surface of a sensor roller whose outer peripheral surface is covered together with a load sensor by a layered member that causes a load change to a peripheral portion of a local load. It is configured as a shape detection device or a shape detection program for detecting the shape of the plate member based on the load from the plate member detected by at least two adjacent load sensors.
Conventionally, since the layered member is not provided, the load from the plate-like member is detected only when the plate-like member directly acts on the load sensor. However, in the present invention, since the layered member is provided, it is possible to detect a load from a plate-like member on which the load sensor is not disposed even if the plate-like member does not directly act on the load sensor. It becomes.
This not only improves the detection accuracy of the shape of the plate-like member between the load sensors, but also includes, for example, end portions (plate end portion, edge portion) of the plate-like member between or outside the load sensors. Even in this case, the end position and / or the plate width of the plate-like member can be accurately detected based on the load from the end. As a result, it is not necessary to separately provide a detection device for detecting the plate width and the plate displacement, and the peripheral equipment of the shape detection device can be prevented from becoming complicated and the equipment scale being increased. Furthermore, since the load between the load sensors can also be detected, it is not necessary to provide a large number of load sensors in the width direction of the plate-like member, and the manufacturing cost of the sensor roller can be suppressed.
Further, it is conceivable that the shape of the plate member is detected based on the ratio or difference between the output values of two or more load sensors. In this case, as a specific method for detecting the shape of the plate member, for example, it is determined whether the ratio or difference of the output values is within a predetermined threshold range. It is conceivable to detect the shape, particularly the end position of the plate member.
Here, as the layered member on the outer peripheral surface of the sensor roller, for example, a member coated in a single layer or a laminate with one or a plurality of sprayed coatings, metal plating, metal sleeves or heat-resistant rubbers can be cited.

  As described above, according to the present invention, the shape of the plate member is detected based on the load from the plate member detected by at least two adjacent load sensors coated with the layer member. Therefore, it is possible to detect a load from a plate-like member in which the load sensor is not arranged even if the plate-like member does not directly act on the load sensor. This not only improves the detection accuracy of the shape of the plate-like member between the load sensors, but also includes, for example, end portions (plate end portion, edge portion) of the plate-like member between or outside the load sensors. Even in this case, the end position and / or the plate width of the plate-like member can be accurately detected based on the load from the end. As a result, it is not necessary to separately provide a detection device for detecting the plate width and the plate displacement, and the peripheral equipment of the shape detection device can be prevented from becoming complicated and the equipment scale being increased. Furthermore, since the load between the load sensors can also be detected, it is not necessary to provide a large number of load sensors in the width direction of the plate-like member, and the manufacturing cost of the sensor roller can be suppressed.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that the present invention can be understood. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.
FIG. 1 is an overall schematic view schematically showing the entire four-stage rolling equipment using the shape detection device X according to the embodiment of the present invention, FIG. 2 is a front view of the sensor roller 4, and FIG. FIG. 4 is a graph showing the relationship between the load transmission rate of the load sensor and the separation distance from the center of the load sensor in the direction of the rotation axis. FIG. 4 shows the load detected by the load sensor and the separation distance from the center of the load sensor to the direction of the rotation axis. 5 is a graph showing the relationship, FIG. 5 is a diagram showing an arrangement position and a load detection range F of a load sensor for measuring a plate edge, FIG. 6 is an enlarged detail view of a portion I in FIG. FIG. 8 is a schematic diagram for explaining the layered member covered on the outer peripheral surface of the sensor roller 4.

First, a schematic configuration of the shape detection device X according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2. In this embodiment, a shape detection device X that detects the shape of a rolled material (an example of a plate-like member) rolled by a rolling mill will be described. However, the shape detection device X is not particularly limited to this, and the shape detection device described above is used. The apparatus X can be applied to detection of the shape of any plate-like member such as a metal plate or a resin plate.
As shown in FIG. 1, the shape detection device X is provided on the downstream side in the rolling direction Y1 of a four-high rolling mill 3 (hereinafter abbreviated as a rolling mill). The sensor roller 4 that rotates in synchronization with the conveyance speed (rolling speed) 1 and a detection signal from a load sensor E provided on the sensor roller 4 when the rolled plate 1 contacts the surface of the sensor roller 4. A controller 6 that detects the shape of the rolled sheet 1 based on (an electric signal such as a current signal or a voltage signal) is generally configured.

As shown in FIG. 2, the sensor roller 4 is a solid type roller having a plurality of load sensors E appropriately arranged on the outer peripheral surface along the rotation axis direction. The outer peripheral surface of the sensor roller 4 is covered with the load sensor E with a layered member 12 that changes a local load to the peripheral portion. Thereby, the load applied to the sensor roller 4 is not concentrated on one point but is distributed to the peripheral portion. As the layered member 12 covering the outer peripheral surface of the sensor roller 4, a thermal spray coating, metal plating, a metal sleeve, heat-resistant rubber or the like coated in a single layer or a laminate, or a combination of these is coated in a laminate. Can be mentioned. Specifically, a metal sleeve 12b covering the outer peripheral surface of the sensor roller 4 is press-fitted, as shown in FIG. 8A, the outer peripheral surface of the metal sleeve 12b is further chrome plated (Cr plated) or the like. As shown in FIG. 8 (b), after the thermal spray coating 12c is coated by a thermal spraying process such as Ni thermal spraying or WC thermal spraying, the thermal spray coating 12c is further coated with the above-mentioned thermal spray coating 12c. As shown in FIG. 8C, the sensor roller 4 is covered with a heat-resistant rubber 12d, and a metal sleeve 12b, a metal sleeve is formed on the outer peripheral surface of the heat-resistant rubber 12d. The thing of the three-layer structure etc. which coat | covered the film | membrane 12a etc. can be considered. Of course, instead of the metal plating 12a in the two-layer structure of FIG. 8A, a thermal spray coating by thermal spraying may be coated. Further, in the two-layer structure of FIG. 8B, the layer structure of the sprayed film 12c and the metal plating 12a may be replaced. Further, in FIG. 8C, instead of the metal plating 12a, a thermal spray coating 12c by thermal spraying may be coated.
Both end portions of the rotating shaft of the sensor roller 4 are rotatably supported via a bearing device 8. One end of the rotating shaft is connected to an output shaft of driving means such as a motor (not shown), and the driving means is controlled so that the sensor roller 4 rotates in synchronization with the rolling speed of the rolling mill 3. Further, at the other end of the rotating shaft, a charge amplifier 10 for converting and amplifying an electric quantity (charge, current signal, etc.) generated by the load sensor E into a voltage signal, and a voltage signal output from the charge amplifier 10 A rotation angle detector for detecting the rotation angle of the rotation axis of the sensor roller 4 is further provided, and a transmitter 11 for optical transmission from the rotating body to the fixed portion is attached. Yes.
In the present embodiment, an example using the above-described solid type sensor roller 4 will be described. However, the present invention is not limited to the solid type roller. For example, a divided disk in which a plurality of disks are stacked in the axial direction of the rotation shaft. The present invention can also be applied to a shape detection device using a laminated type roller.

The load sensor E includes a crystal type piezoelectric transducer 5b (hereinafter abbreviated as a transducer) housed in a sensor hole (not shown) on the surface of the sensor roller 4, as shown in a detailed view of the portion H in FIG. The sensor hole is closed, and a circular sensor cap 5a for transmitting the load received from the rolled plate 1 to the transducer 5b, and a signal line (not shown), etc. In the present embodiment, a sensor cap 5a having a diameter of 30 mm is used. That is, the load sensor E can detect a direct load on the entire surface of the sensor cap 5a having a diameter of 30 mm.
A plurality of the load sensors E are arranged along the axial direction of the sensor roller 4 at predetermined intervals (in this embodiment, the sensor pitch D is described as 25 mm) and shifted by a predetermined angle in the rotation direction.
When the rolled plate 1 comes into contact with the surface of the sensor roller 4 covered with the layered member 12, a load (in the radial direction) perpendicular to the rotational axis of the sensor roller 4 from the rolled plate 1 (the radial direction of the rolled plate 1). Tension) acts, and the load is transmitted to the load sensor E through the layered member 12. At this time, in the load sensor E, a current signal (sensor output signal) corresponding to the load is generated. After that, the current signal is converted into a voltage signal in the charge amplifier 10 and then in the transmitter 11 in the charge amplifier. The voltage signal output from 10 is subjected to A / D conversion and PCM processing, and is then optically transmitted from the rotating body to the fixed portion and transmitted to the controller 6.
The controller 6 includes various control devices such as a CPU, RAM, and ROM. When these control devices execute arithmetic processing according to a predetermined program based on the electrical signal transmitted from the load sensor E, the shape of the rolled sheet 1 is detected. The detected shape data is externally output to a display means (not shown) such as a monitor connected to the controller 6 in communication.

Since the load sensor E is covered with the layered member 12 as described above, the load from the rolled plate 1 is determined according to the load transmission rate indicated by the bold line in FIG. To the sensor cap 5a). In addition, the load transmission rate said here means the ratio of the load detected by the said load sensor E with respect to the load from the said rolled sheet 1. FIG. 3A shows the load transmission rate of the load sensor E in the sensor roller 4 not covered with the layered member 12, and FIG. 3B shows the load in the sensor roller 4 covered with the layered member 12. The load transmission rate of the sensor E is shown. The vertical axis in the figure is the load transmission rate, and the horizontal axis is the distance from the center point of the load sensor E in the direction of the rotation axis. Further, d in the figure is the diameter (30 mm) of the sensor cap 5a, and L indicates the radius of the load detection range F (see FIG. 5) in which the load can be detected by the load sensor E. The radius L of the load detection range F is a numerical value determined by the layer thickness, material, number of layers, the performance (characteristics) of the load sensor E, etc., and in this embodiment, at least the sensor pitch. The load sensor E or the layered member 12 is selected so as to have a value larger than D (25 mm). That is, in the present embodiment, the load sensor E is arranged so that the load detection range F (FIG. 5) of adjacent sensors overlaps in order to detect the load in the entire width direction of the rolled sheet 1.
In the conventional shape detection device, since the sensor roller is not covered with the layered member 12, as shown in FIG. 3 (a), the outside of the sensor cap 5a of the load sensor E (range from d / 2 to L). ) Is not transmitted to the load sensor E, and therefore the load transmission rate is substantially zero. On the other hand, in the shape detection device X according to the present embodiment, since the layered member 12 is covered on the sensor roller 4, as shown in FIG. The load sensor E transmits not only the load that acts or pressurizes in the range (up to d / 2) but also the load on the outside (range up to d / 2 to L). Thus, according to the present shape detection device X, the load in the range where the load sensor E is not arranged in the rotation axis direction of the sensor roller 4 (range from d / 2 to L) can also be detected. Even when there is an end portion of the rolled sheet 1 between or outside the load sensors E, the end position and / or width of the rolled sheet 1 is accurately detected based on the load from the end portion. Is possible.

Based on the load transmissibility that changes as shown in FIG. 3 (b) depending on the position of the load received from the rolled sheet 1, the end of the rolled sheet 1 from the load detected by the load sensor E and the center point of the load sensor E. The relationship with the distance up to can be expressed as shown in FIG. The relationship shown in FIG. 4 is corrected by a well-known calibration device (not shown) that applies a certain load to the sensor roller 4 in advance and verifies the output detected from each load sensor E, and is acquired thereafter. Is. The head portion of the calibration device can be shifted in the axial direction of the sensor roller 4 while applying a constant load to the sensor roller 4, and the output of each load sensor-E can be corrected by changing the load point. it can.
The vertical axis of the graph in the figure is the detected load (or detection signal value) detected by the load sensor E. The abscissa indicates the distance from the center point of the load sensor E to the end of the rolled sheet 1 and is positive toward the center of the rotation axis of the sensor roller 4 and negative toward the end of the rotation axis. Show. In the present embodiment, in order to simplify the description, the description will be made using the graph of FIG. 4 having linear characteristics. However, in general, the characteristics of the load sensor E to be used and the layered member 12 to be coated are described. The relationship shown in FIG. 4 is a non-linear characteristic depending on the material, thickness, and the like.
As shown in the graph of FIG. 4, for example, if the rolled plate 1 to the entire region (range of 0 to ± L) of the load detection range F is in contact, the load W ₀ in the load sensor E is detected, When the rolled sheet 1 is not in contact with the load detection range F, the load is not detected. It is assumed that the load sensor E is calibrated so that the load W ₀ is detected when the rolled plate 1 is in contact with the entire load detection range F.
Therefore, for example, when the rolled plate 1 is in contact with the sensor roller 4 in the state shown in FIGS. 5 and 6, that is, on the left end side (hereinafter referred to as “WS side”) of the sensor roller 4 in FIG. When the plate end portion T _WS is only on the load sensor E ₂ (see FIG. 6), the load W ₀ is detected by the load sensor E ₃ and the load sensor on the center side of the sensor roller 4 from this. Further, assuming that a load W (E ₂ ) is detected in the load sensor E ₂ in which the rolled plate 1 is in contact with a part, the plate end portion T _WS of the rolled plate 1 at this time is shown in FIG. It is read that the position is away from L _{WS2 in} the direction of WS from the center of E ₂ (in the direction of the end of the rotating shaft of the sensor roller 4). Similarly, when W (E ₁₎ is detected in the load sensor E ₁ of rolled plate 1 is in contact with a portion of the load detection range F of the load sensor E _1, 4, the rolling in this case It is read that the plate end portion T _WS of the plate 1 is at a position away from the center of the load sensor E ₂ by L _WS1 toward the center of the rotation axis of the sensor roller 4.
Thus, the position of the plate end portion T _WS obtained based on the output of the load sensor E ₁ and the position of the plate end portion T _WS obtained based on the output of the load sensor E ₂ are the load in the plate width direction. If the distribution is constant (if the shape is dead-flat), then theoretically agree. However, since there is usually a load distribution in the plate width direction, there is a difference between the two positions obtained as described above. Therefore, in this case, the position obtained by the (process S60~S90 in Figure 7) process described below is determined as the plate end portion T _WS of rolled plate 1.
Here, also for the plate end portion T _DS of the right end side of the sensor roller 4 (hereinafter referred to as "DS-side") in FIG. 5, the position is read from the graph of FIG. 4 in a similar manner as described above.

In the shape detection device X according to the present embodiment, the relationship shown in FIGS. 3B and 4 is stored as table data in a storage medium such as a RAM provided in the controller 6. Therefore, the controller 6 determines a predetermined program (shape detection program) based on the detection signal (indicating the load detected by the load sensor E) transmitted from the load sensor E and the table data stored in the storage medium. ), The end position of the rolled sheet 1 (an example of the shape of the plate member) is detected. Hereinafter, an example of the procedure of the arithmetic processing executed by the controller 6 (CPU) will be described with reference to the flowchart of FIG. In the figure, S10, S20,... Indicate process procedure (step) numbers, and the process starts from step S10.
First, when the rolled plate 1 rolled by the rolling mill 3 is conveyed and contacts the sensor roller 4, the load sensor E receives the electric signal (output signal) generated by the load sensor E due to the contact. The detected load is detected (S10). Thereafter, the detected loads are sequentially stored in the RAM (storage medium) of the controller 6 (S20). In the present embodiment, as will be described later, a processing example of detecting the end position of the rolled sheet 1 using the data of FIG. 4 based on the load obtained according to the output signal of the load sensor E. Needless to say, a processing example for detecting the end position of the rolled sheet 1 based on the output signal itself of the load sensor E may be used.

  Subsequently, in step S30, it is determined whether or not the sensor roller 4 has rotated once. As described above, the load sensor E is arranged along the axial direction of the sensor roller 4 and shifted by a predetermined angle in the rotation direction. This is because the value cannot be detected. This determination is made based on the detection result of the zero point position signal of the sensor roller 4 detected from the position transmitter 11.

When one rotation of the sensor roller 4 is determined in step S30, it is subsequently determined whether a load detection value (detection signal) corresponding to less than the load W ₀ is detected from two adjacent load sensors E. (S40). For example, when the rolled plate 1 is in contact with the sensor roller 4 in the state shown in FIG. 6, the detection value (> 0) less than the load W ₀ is detected in the adjacent load sensors E ₁ and E ₂ . Therefore, the process of step S40 proceeds to the Yes side. Here, since the case where the detection value of the less load W ₀ from the respective load sensors E _1, E ₂ is not detected, is considered to malfunction has occurred in the load sensor E _1, E _2, this case is the fact Is displayed (error output) or the like, and then the processing is interrupted (S71).
It is to be noted that a load sensor that is applied to the controller 6 (FIG. 1) in advance (or memorized) the width information and the centering position of the rolled plate 1 that is applied to the end portion of the rolled plate 1 is applied. If it is known in advance, it is only necessary to monitor only the sensor in the vicinity of the known load sensor and detect the output value without performing the process of step S40. For example, when the rolled plate 1 is set in the state as shown in FIG. 5, the load sensors E ₁ , E ₂ , E ₃ on the WS side where the plate end portion T _WS will be applied are connected to the plate end portion. T registered in the controller 6 as a sensor for the detection of _WS, the load sensor E ₁ of it will take a plate end portion T _DS DS side ', E _2', detection of the plate end T _DS and E ₃ ' It is only necessary to register in the controller 6 as a sensor for detection and detect the output value of only the registered sensor.

When the process proceeds to step S50, here, the detected values less than the detected load W ₀ (detected values of the load sensors E ₁ and E ₂ ) and the data shown in FIG. 4 stored in a storage medium such as a RAM, based on, the distance from the center position of the load sensor E _1, E ₂ to the plate end portion T _WS is respectively determined separately. When this time is the distance L _WS1 and L _WS2 obtained,該離distance L _WS1 and L _WS2 and known load sensor E _1, based on the position of the E ₂ of the rolled plate 1 plate end portion T _WS The position of is detected. Of course, the plate end T _DS of the DS side is determined in the same manner as described above. Note that the distances from the center positions of the load sensors E ₁ ′ and E ₂ ′ to the plate end T _DS are L _DS1 and L _DS2 , respectively.
When the position of the end portion of the rolled plate 1 is detected in this way, the width of the rolled plate 1 can also be detected. Furthermore, if the centering position, the sheet width information, etc. of the rolled sheet 1 are input (registered) in advance, it is possible to detect whether a sheet displacement has occurred.
By the way, in the step S50, two positions are detected for the plate end portion _TWS of the rolled plate 1 based on the detection values of the two load sensors E ₁ and E ₂ . In this case, in step S60, the absolute value (| L _WS1 + L _WS2 −D |) of the value obtained by subtracting the sensor pitch D from the value obtained by adding the obtained separation distances L _WS1 and L _WS2. Is determined as a threshold value. Of course, the threshold _values are similarly determined for the separation distances L _DS1 and L _DS2 . When it is determined that the absolute values on both the WS side and the DS side are less than the threshold value as a result of the threshold determination (Yes side in S70), the positions of the two detected plate end portions _TWS are substantially Since it can be determined that they coincide with each other, any position or an average value thereof is determined as the WS end position on the rolled sheet 1 (S80). Of course, the position of the plate end on the DS side of the rolled plate 1 is similarly determined (S80).
In step S70, the example in which the threshold is determined based on the absolute value of the value obtained by subtracting the sensor pitch D from the value obtained by adding the separation distance has been described. For example, the value obtained on the WS side (or DS side) is 2 A processing example in which a threshold is determined based on the absolute value of the difference between two end positions (for example, position coordinates from the center of the sensor roller 4) may be used. Of course, the present invention is not limited to such a difference value. For example, a processing example in which a threshold value is determined based on the ratio between two detected end positions may be used. The end position of the rolled sheet 1 determined in step S80 is displayed and output on a display means such as a monitor.

If it is determined in step S70 that the value is equal to or greater than the above threshold (No in S70), it is considered that there is an unacceptable difference between the two detected end positions. After that, the processing is interrupted (S71).
When the end position is determined in step S80, it is determined in step S90 whether or not to continue the series of processes from steps S10 to S80. Such determination is made based on whether or not a predetermined condition is satisfied. For example, whether the rolling plate 1 is in contact with the sensor roller 4 or the speed of the sensor roller 4 or the rolling speed is equal to or higher than a specified value. It is performed depending on whether or not a condition such as whether or not there is satisfied. If it is determined in step S90 that the process is to be continued, the processes from step S10 are repeated.
In this way, a series of processes for detecting the end of the rolled sheet 1 based on the output values of two or more adjacent load sensors E ₁ and E ₂ are performed in the controller 6. The position of the part can be detected with high accuracy.

  In the above-described embodiment, an example has been described in which processing is interrupted after display output (error output) when it is determined in step S70 in FIG. This is an example of a process for requesting the user to change the threshold without interrupting the process, and performing the threshold determination process in step S70 again based on the changed threshold when the threshold is changed in response to the request. May be. When there is an error in a predetermined threshold or when an extremely strict threshold is set, the above threshold can be changed as appropriate so that these errors can be dealt with immediately. desirable.

  The present invention can be applied to a shape detection device that detects the shape of a plate-like member.

The whole schematic diagram which represents typically the whole of the four-high rolling equipment in which the shape detection apparatus X which concerns on embodiment of this invention was used. The front view of the sensor roller 4. FIG. The graph which shows the relationship between the load transmission rate of a load sensor, and the separation distance from a load sensor center to a rotating shaft direction. The graph which shows the relationship between the load detected by a load sensor, and the separation distance to the rotating shaft direction from the center of a load sensor. The figure which shows the arrangement position and load detection range F of the load sensor which measures a board edge part. FIG. 6 is an enlarged detail view of a portion I in FIG. 5. 7 is a flowchart for explaining a procedure of arithmetic processing executed by the controller 6; FIG. 3 is a schematic diagram for explaining a layered member covered on the outer peripheral surface of a sensor roller.

Explanation of symbols

X ... Shape detection device E (E ₁ , E ₂ , ...) ... Load sensor 1 ... Rolled plate (an example of a plate-like member)
DESCRIPTION OF SYMBOLS 3 ... Four-high rolling mill 4 ... Sensor roller 5a ... Sensor cap 5b ... Crystal-type piezoelectric transducer 6 ... Controller 8 ... Bearing apparatus 10 ... Charge amplifier 11 ... Transmitter 12 ... Layered member

Claims (6)

Based on the load from the plate member detected by the load sensor by contacting the plate member with the surface of the sensor roller having a plurality of load sensors appropriately arranged on the outer peripheral surface along the rotation axis direction. A shape detection device for detecting the shape of the plate-shaped member,
The outer peripheral surface of the sensor roller is covered with the load sensor by a layered member that causes a load change to the peripheral portion of the local load,
When the plate-like member contacts the layered member on the surface of the sensor roller, the shape of the plate-like member is detected based on a load from the plate-like member detected by at least two adjacent load sensors. A shape detecting device characterized by comprising:   The shape detection apparatus according to claim 1, wherein the shape of the plate-like member is detected based on a ratio or difference between output values of two or more load sensors.   The shape detection device according to claim 1, wherein the detected shape of the plate-like member is an end position and / or a plate width of the plate-like member in the rotation axis direction of the sensor roller.   The shape detection device according to any one of claims 1 to 3, wherein an outer peripheral surface of the sensor roller is coated in a single layer or a laminate with one or a plurality of spray coatings, metal plating, metal sleeves, or heat-resistant rubber. Based on the load from the plate member detected by the load sensor by contacting the plate member with the surface of the sensor roller having a plurality of load sensors appropriately arranged on the outer peripheral surface along the rotation axis direction. A shape detection program used in a computer for a shape detection device for detecting the shape of the plate-shaped member,
In the above computer,
Two or more load sensors adjacent to each other by contacting the plate-like member with the surface of the sensor roller whose outer peripheral surface is covered together with the load sensor by a layered member that causes a load change to the peripheral portion of the local load. A shape detection program for detecting the shape of the plate-like member based on the load from the plate-like member detected in step (1).   The shape detection program according to claim 5, wherein the shape of the plate member is detected based on an output ratio or a difference between two or more adjacent load sensors.

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