JPH0820377B2 - Band position display device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strip position display device used for visually confirming a defective portion such as a surface flaw in a continuous strip processing line for strips such as steel plates.

[0002]

2. Description of the Related Art In particular, when an AI (artificial intelligence) of an automatic surface flaw detector is used to teach defect type or grade, or when a reference is changed, an abnormal portion detected by the automatic surface flaw detector can be swiftly and quickly detected. An accurate display device is essential.

For example, in a continuous processing line for steel plates,
In order to evaluate whether or not the flaw determination result (type of flaw, grade, etc.) detected by the steel plate surface flaw inspection device is correct, the inspector is informed of the position of the flaw detected and determined by this inspection device, Need to visually confirm.

[0004]

BACKGROUND ART In particular, time is teaching the defect type by or grades AI (artificial intelligence) surface defects automatic test equipment, or the like when changing the reference, the abnormal portion surface flaw automatic inspection device detects rapid and An accurate display device is essential.

[0005]

However, the above-mentioned conventional apparatus has the following problems, and the accuracy of the inspection performance evaluation is insufficient.

(1) Since there is no display function of the position of the flaw in the plate width direction, when there are a plurality of flaws in the width direction, it is not known which flaw was detected by the surface flaw inspection apparatus 1. So I cannot evaluate. In addition, even if there are a plurality of flaws, the inspector can find only one of them, and if it is not the flaw to be evaluated, the evaluation is wrong. Furthermore, the inspector must try to find flaws to be evaluated over the entire width, which is not efficient because many unnecessary inspections are performed.

(2) Since the inspection position indicator 6 is fixed, when the evaluation is performed while the steel plate S is moved without stopping, which case is present in the case where there are a plurality of flaws before and after the flaw to be evaluated in the line direction? It cannot be evaluated because it is not known whether the flaw is detected by the surface flaw inspection apparatus 1. In addition, even if there are a plurality of flaws, the inspector can find only one of them, and if it is not the flaw to be evaluated, the evaluation will be erroneous. These problems are exacerbated as the degree of defects is lighter.

As a device capable of accurately ascertaining the widthwise position of a flaw in a strip, there is disclosed in Japanese Patent Laid-Open No. 63-455.
Japanese Patent Publication No. 46 has been proposed. This device is intended to visually confirm the position of the flaw in the width direction by a plurality of identification lights projected from a light projecting device arranged across the pass line of the strip.

However, the above device also has the following problems. (1) Since it is difficult to grasp the position of the flaw in the line direction, a light projecting device for checking the position in the line direction is required separately, which increases the size of the device and increases the cost. (2) Since the light projecting device covers the upper part of the plate surface, the inspector cannot observe at a close range. (3) Only the upper surface of the strip can be observed, and the front and back surfaces cannot be observed under the same conditions.

Therefore, according to the present invention, the position of a defect such as a surface flaw is specified and reproduced in a narrow area of the strip, and the defect can be observed from a close range to improve the accuracy and efficiency of the evaluation of the defect. It is an object of the present invention to provide a band position display device which is improved and is compact in size.

[0011]

In order to achieve the above object, the present invention, in a continuous strip processing line, detects the detection position on the strip on the downstream side based on the detection information on the upstream side. It is a device to reproduce and display, and it is equipped with a main body arranged parallel to the line direction of the strip, a projector attached to this main body, and a length measuring device for measuring the transport length of the strip, The position to be displayed is surrounded by at least two slit light images in the line direction and the width direction from the projector in a cross pattern.

[0012]

[Function] The detection position reproduced and displayed on the downstream side is surrounded by the slit light image in the line direction and the width direction from the projector and is displayed in a checkered pattern, so that the inspector can easily detect the defective portion in the narrow area. Can be discovered and the accuracy and efficiency of the assessment is improved.

[0013]

1 and 2 show an embodiment in which the present invention is applied to a vertical pass. The main body 10 is formed into a vertically long rectangular parallelepiped by vertically arranging four frames 12 on the upper part of a storage box 11 at the bottom, and is movable by casters 13. A ball-screw type moving device 14 is installed in the central portion of the main body 10 in the longitudinal direction, and two widthwise slit light beams that are horizontally rotatable are mounted on a movable base 15 that is vertically movable. A floodlight 16 is attached. These two floodlights
16 are installed at intervals of a predetermined unit length in the inspection of the flaw inspection device. A servo motor for driving the moving device is provided in the storage box 11 at the lower end of the moving device 14.
17 are stored.

Seven line direction slit light projectors 18 are attached to the upper portion of the main body 10 so as to be rotatable in the horizontal direction along the longitudinal direction thereof. The light projectors 18 may be provided in the number corresponding to the number of width sections of the strip S in the flaw inspection device, and are not limited to seven.

The width direction slit light projector 16 and the line direction slit light projector 18 project slit light images 16a and 18a on the surface of the strip S, for example, He-
A laser head using a Ne gas laser is preferable. The laser transmitter is installed inside the storage box 11 and
Optical fibers 19 are connected to 16 and 18.

In FIG. 1, 20 is an operation panel for each of the light projectors 16 and 18, and 21 is a length measuring device provided upstream from the flaw display position. This length measuring device 21 measures the passage length of the strip S that is traveling and conveyed, and controls a pulse signal 22 that is a signal for specifying the position of the strip S in the length direction.
It is output to 23 (see FIG. 4).

As shown in FIG. 4, each projector 16, 18 is controlled by a controller 23. That is, the controller 23 receives the width division signal 25 corresponding to the width position of the flaw K to be evaluated and the line direction position signal 26 from the flaw inspection device 24 provided on the upstream side. The subsequent line direction position of the defect K is tracked by the pulse signal 22 from the length measuring device 21. The controller 23 sends a projector control signal 27 to each of the projectors 16 and 18.

The line stops when the flaw K reaches substantially the center of the main body 10 of the position display device. Therefore, after moving the movable table 15 to move the widthwise slit light projector 16 to an accurate position corresponding to the flaw K, the projectors 16 and 18 are turned on. In that case, the projector for the slit light in the line direction
18 is a defect K determined based on the width division signal 25 described above.
The adjacent two lights at the position corresponding to the position in the width direction of the.
Therefore, the flaw K of the strip S is, as shown in FIG.
Since the slit light images 16a and 18a from 6 and 18 are surrounded in a cross pattern, the inspector evaluates the kind, grade, etc. of the flaw K and inputs the data into the input device for storage.

When the evaluation is completed, the line start switch is pressed to restart the line. The time required during this period is 5 to 10 seconds. When the slit light image 18a of the line direction slit light projector 18 overlaps with the flaw K in coincidence, the light image may not be used and the adjacent light projector 18 may be turned on.

When the grade of the flaw K to be evaluated is severe, 1
It can be evaluated in ~ 2 seconds, so without stopping the line
The evaluation may be performed while moving at a low speed (for example, 30 m / min). In this case, the width direction slit light projector 16
Should be moved by the moving device 14 together with the movement of the defect K.

FIG. 3 shows an embodiment in which the present invention is applied to a horizontal pass. In this case, the main body 10a of the position display device is formed in a horizontally long shape, and the side of the line of the strip S is shown. And parallel to the line. Other configurations and operations are similar to those of the above-described embodiment.

The line-direction slit light projector 18
As described above, the aim may be fixed, or a predetermined number of sets of the projectors 18 may be arranged, and an aiming device may be provided for adjusting the aim according to the upstream detection information so that the set alone sandwiches the reproduction display position. May be. The present invention can also be applied to the determination of necessity of discarding rejected defective parts.

[0023]

EFFECTS OF THE INVENTION Since the present invention has the above-mentioned structure, it has the following effects. The detection position that is reproduced and displayed on the downstream side is surrounded and displayed in # digits by the slit light image in the line direction and the width direction from the projector, so that the inspector can easily and easily detect the defective portion in the narrow area. It can be found in time, and thus the accuracy and efficiency of evaluation can be dramatically improved.

Since the main body of the apparatus can be placed away from the strip, the inspector can observe the strip from a close range without being disturbed by the light projecting device, which facilitates the evaluation operation. , The evaluation can be achieved with high accuracy.

In the structure in which the strip is visually confirmed by the vertical pass, the front and back surfaces can be in the same posture and the best observation distance can be selected, so that the confirmation can be performed quickly and accurately.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of the apparatus body.

FIG. 3 is a perspective view showing another embodiment of the present invention.

FIG. 4 is a block diagram of an embodiment of the present invention.

FIG. 5 is a simple perspective view showing a conventional example.

[Explanation of symbols]

 S; Strip K; Defects 10, 10a; Main body 14; Moving device 16; Width direction slit light projector 18; Line direction slit light projectors 16a, 18a; Slit light image 21; Length measuring device 23; Controller

Claims (5)

[Claims] 1. A device for reproducing and displaying the detection position on the strip on the downstream side on the basis of the detection information on the upstream side in a continuous strip processing line, in the line direction of the strip. A main body arranged in parallel, a light projector attached to the main body, and a length measuring device for measuring the conveyance length of the strip, and the position to be reproduced and displayed are the line direction and the width from the light projector. A strip position display device that is surrounded by at least two slit light images in the same direction in a cross beam shape. 2. The strip position display device according to claim 1, wherein a path line direction of the strip in the detection position reproduction display section is set to a vertical direction, and the main body is arranged vertically on a horizontal floor. . 3. The position indicator for a strip according to claim 1, wherein the slit light projector in the width direction is attached so as to be movable in the line direction of the strip. 4. The light projector divides the strip width into a predetermined number,
4. The band position display device according to claim 1, comprising a line-direction slit light projector group whose sight is fixed in advance at the divided position, and at least one set of width-direction slit light projectors. 5. A predetermined number of at least one set of width-direction slit light projectors and a set of line-direction slit light projectors are arrayed, and each set is aimed by an upstream detection signal so as to sandwich a reproduction display position in the center. 5. The strip position display device according to claim 1, further comprising a sighting device.