JP4177565B2 - Method for adjusting calibration roll for scissors inspection apparatus and scissors inspection apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for adjusting a calibration roll for a wrinkle inspection apparatus and a wrinkle inspection apparatus, in particular, a wrinkle inspection apparatus that picks up the surface of a plate material such as a steel plate with a line sensor camera and detects a surface wrinkle based on the captured image. The present invention relates to a calibration roll adjusting method for installing a wrinkle inspection apparatus, and a wrinkle inspection apparatus provided with the calibration roll adjustment means.
[0002]
[Prior art]
The most important of the adjustment of the eyelid inspection device is the adjustment of the optical system, which must be precisely adjusting the viewpoint, focus and field of view of the line sensor camera, and the adjustment requires strict accuracy on the order of millimeters or less. Therefore, when adjusting the wrinkle inspection device, it is a common practice to adjust the viewpoint, focus, and field of view of the camera based on the support roll that supports the plate of the plate material and the adjustment sheet on the support roll. It has been broken.
[0003]
However, adjustment by placing an adjustment sheet on the support roll is limited to the case of a factory stop, but the camera or the like may break down during online threading. In such a case, since it is required to adjust the camera offline, a calibration roll having a position configuration similar to that of the support roll and having an adjustment sheet equivalent for camera adjustment already placed is arranged offline. Yes. Therefore, it is necessary to carefully adjust the calibration roll during the initial installation so that the position configuration is exactly the same as that of the support roll. In this adjustment, (1) leveling using a Y level meter and (2) positioning based on measurement by a person using a metal ruler or measure were performed. However, in the method (1) or (2), an error of several millimeters per meter is generated, and it is extremely difficult to adjust with high accuracy.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide a method for adjusting a calibration roll for a wrinkle inspection device and a wrinkle inspection device capable of easily adjusting the calibration roll with high accuracy.
[0005]
[Means for Solving the Problems]
The wrinkle inspection apparatus according to the present invention includes a support roll that performs inspection by winding a plate-like inspection material, and is spaced from the support roll in the roll axis direction, with the roll axes parallel to each other and at the same height. A calibration roll arranged, a carriage movable between a position facing the support roll and a position facing the calibration roll along the direction of the roll axis, and a plate-like inspection wound around the support roll An illumination device mounted on the carriage for illuminating the surface of the material over the entire width of the support roll, an imaging device mounted on the carriage for imaging the surface of the material to be inspected, and the outer circumference of each of the support roll and the calibration roll And an adjustment sheet having a reference line , wherein the calibration roll has a relative position between the imaging device and the surface of the calibration roll when the calibration roll is at an opposing position. Material Reference light is radiated obliquely from above and obliquely downward to an adjustment sheet that is arranged so as to be matched with the relative position between the imaging device at the time of inspection and the surface of the support roll. The reference marks spaced in the roll axis direction are formed at both ends of the adjustment sheet, and the reference light irradiation device capable of adjusting the irradiation direction of the reference light is opposed to the both ends of the support roll. It is provided on a carriage, and the position of the calibration roll and the optical system of the imaging device can be adjusted.
[0006]
The carriage may be movable on a rail disposed in parallel with the roll axis.
[0007]
In the wrinkle inspection device, the reference light irradiation device is preferably a laser pointer. The laser pointer can form a high illumination, small reference mark on the adjustment sheet surface. The laser pointer may be a pointer that forms a circular or slit-shaped reference mark.
[0008]
The method for adjusting a calibration roll for a wrinkle inspection apparatus according to the present invention is the wrinkle inspection apparatus according to any one of claims 1 to 5, wherein the position of the calibration roll to which the adjustment sheet for adjusting imaging conditions is attached. In the method of adjusting the reference sheet, reference beams spaced apart in the roll axis direction are irradiated with reference light from the obliquely upward and obliquely downward directions on the adjustment sheet attached to the support roll, and both ends of the adjustment sheet The reference light irradiation direction is adjusted and maintained so that each reference mark is positioned on the reference line of the adjustment sheet, and the reference light irradiation device irradiates the adjustment light on the calibration roll with the reference light irradiation device. Then, the position of the calibration roll is adjusted so that the reference mark is positioned on the reference line.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
1 (a) and 1 (b) are side views schematically showing an example of a wrinkle inspection apparatus 10 that implements the adjustment method of the present invention. The heel inspection apparatus 10 includes a carriage 11 that moves on a rail 5 that is laid in a direction parallel to the roll axis of the support roll 1. FIG. 1A shows a case where the eyelid inspection apparatus 10 is placed on the support roll 1 side, and FIG. 1B shows a case where the eyelid inspection apparatus 10 is placed on the calibration roll 35 side. 2A shows a side view of the positional relationship between the support roll 1 and the calibration roll 35, and FIG. 2B shows the positions of the support roll 1, the calibration roll 35, and the eyelid inspection apparatus 10. A diagram showing the relationship is shown.
[0011]
Returning to FIG. 1, the apparatus will be described. In FIG. 1, a support frame 14 extending in the roll axis direction is provided on a carriage 11. A stand portion 15 is provided in the center of the support frame 14 in the roll axis direction, and an illumination device 18 directed to the support roll 1 is provided on the stand portion 15. The illumination device 18 can illuminate substantially the entire width of the support roll 1. An imaging device 19 is attached to the tip of the bracket portion 16 of the support frame 14 in the center in the roll axis direction. In addition, the to-be-inspected material S is sprinkled on the support roll 1, and a surface flaw inspection is performed.
[0012]
Reference light irradiation devices 20 and 24 that are vertically paired are attached to both ends of the bracket portion 16 and the stand portion 15 in the roll axis direction. The reference light irradiation devices 20 and 24 are laser pointers, and form circular reference marks 21 and 25 on the adjustment sheet 30 attached to the support roll 1 (see FIG. 3). In order to grasp the erroneous installation of the calibration roll 35 by the movement of the reference light, in order to ensure accuracy, it is necessary to use a light source that does not diffuse as much as possible, and to have as small a point as possible.
[0013]
The lighting device 18, the imaging device 19, and the reference light irradiation devices 20 and 24 can all adjust the directivity direction.
[0014]
At a distance to the roll axis Direction of the support rolls 1, substantially calibration roll 35 of the same length are arranged between the support roll 1. The calibration roll 35 extends parallel to the support roll 1 and has the same height as the support roll 1.
[0015]
A calibration roll adjustment method of the eyelid inspection apparatus 10 configured as described above will be described.
[0016]
The adjustment sheet 30 is attached to the support roll 1 so that the reference line of the adjustment sheet 30 shown in FIG. 3 is horizontal and passes through the intersection 2 between the roll outer periphery and the horizontal line. The wrinkle inspection device 10 is moved and placed on the support roll 1 side, and the reference light is irradiated on the adjustment sheet 30 from the upper and lower sides by the reference light irradiation devices 20 and 24. As shown in FIG. 3, an upper reference mark 21 and a lower reference mark 25 that are spaced apart in the roll axis direction are formed at both ends of the adjustment sheet 30. When the upper reference mark 21 and the lower reference mark 25 are off the reference line 31 as shown in FIG. 3A, these reference marks 21 and 25 are positioned on the reference line 31 as shown in FIG. Thus, the irradiation direction of the reference light irradiation devices 20 and 24 is adjusted and fixed to the support frame 14 in that state.
[0017]
When the adjustment of the reference light irradiation devices 20 and 24 is finished, the wrinkle inspection device 10 is moved and placed on the calibration roll 35 side. The adjustment sheet 40 is attached to the calibration roll 35 so that the reference line 41 of the adjustment sheet 40 shown in FIG. 4 is horizontal and passes through the intersection 36 between the roll outer periphery and the horizontal line L. The reference light is radiated to the adjustment sheet 40 from the upper and lower sides by the reference light irradiation devices 20 and 24.
[0018]
If the upper reference mark 21 and the lower reference mark 25 on the left side (work side: WS) and the right side (drive side DS) are all on the reference line 41 as shown in FIG. It will be in the same state as the support roll 1. For example, when the upper reference mark 21 and the lower reference mark 25 on the right side are both above the reference line 41 as shown in FIG. 4B, the right end of the calibration roll 35 is raised and the reference marks 21 and 25 are moved to the reference line 41. To match. On the other hand, as shown in FIG. 4C, when both the reference marks 21 and 25 are below the reference line 41, the DS (right end) of the calibration roll 35 is lowered so that the reference marks 21 and 25 coincide with the reference line 41. . FIG. 4D shows a case where the reference mark 21 irradiated from above is above the reference line 41 and the reference mark 25 irradiated from below is below the reference line 41. In this case, the calibration roll DS (right end) is moved away from the carriage 11 so that the reference marks 21 and 25 coincide with the reference line. The case of FIG. 4 (e) is opposite to the case of FIG. 4 (d), and the DS (right end) of the calibration roll is brought close to the carriage 11 so that the reference marks 21 and 25 coincide with the reference line.
[0019]
By using the calibration roll adjusted as described above, the viewpoint, focus, and field of view of the imaging device can be accurately adjusted when the imaging device is repaired or replaced.
[0020]
In FIG. 4, the left side is WS (work side) and the right side is DS (drive side). However, depending on the line, the right side is WS (work side) and the left side is DS (drive side). In this case, it is sufficient to apply the method of the present invention by reversing the left and right.
[0021]
【The invention's effect】
In the calibration roll adjusting method, the position of the calibration roll is adjusted using the reference light whose irradiation direction is adjusted in the support roll, so that the calibration roll can be adjusted with high accuracy and easily. Since the adjustment work can be performed off-line, it is possible to adjust the shooting conditions of the imaging apparatus even when the production line is in operation.
[Brief description of the drawings]
FIG. 1 is a side view schematically showing an example of a wrinkle inspection apparatus for carrying out the adjustment method of the present invention.
FIG. 2 is a diagram illustrating an arrangement of a support roll, a calibration roll, and a wrinkle inspection device.
FIG. 3 is a front view of an adjustment sheet attached to a support roll.
FIG. 4 is a front view of an adjustment sheet attached to a calibration roll, and is a drawing for explaining a calibration roll adjustment method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Support roll 5 Rail 10 Sputum inspection apparatus 11 Cart 14 Support frame 18 Illumination apparatus 19 Imaging apparatus 20 Upper reference light irradiation apparatus 21 Upper reference mark 24 Lower reference light irradiation apparatus 25 Lower reference mark 30 Adjustment sheet 31 for support roll Line 35 Calibration roll 40 Calibration roll adjustment sheet 41 Reference line

Claims (6)

A support roll that performs inspection by winding a plate-shaped material to be inspected, a calibration roll disposed at the same height with the roll axis being parallel to each other and spaced apart in the roll axis direction; A carriage movable between a position facing the support roll and a position facing the calibration roll along the direction of the roll axis, and the surface of the plate-shaped object to be inspected wound around the support roll An illuminating device mounted on the carriage that illuminates over the entire width, an imaging device mounted on the carriage that images the surface of the material to be inspected, and an adjustment sheet having a reference line on the outer periphery of each of the support roll and the calibration roll The calibration roll is an imaging apparatus in which the relative position between the imaging apparatus when the calibration roll is at an opposing position and the surface of the calibration roll inspects the inspection object. The adjustment sheet is arranged to be adjustable so as to match the relative position with the surface of the support roll, and the adjustment sheet attached to the support roll is irradiated with reference light obliquely from above and obliquely below to be spaced in the roll axis direction. A reference mark is formed on both ends of the adjustment sheet, and a reference light irradiation device capable of adjusting the irradiation direction of the reference light is provided on the carriage so as to face both ends of the support roll, A wrinkle inspection apparatus capable of adjusting the position of an optical system of a calibration roll and an imaging apparatus.   The wrinkle inspection apparatus according to claim 1, wherein the carriage is movable on a rail disposed in parallel with the roll axis.   The wrinkle inspection apparatus according to claim 1, wherein the reference light irradiation device is a laser pointer.   The wrinkle inspection apparatus according to claim 3, wherein the laser pointer forms a circular reference mark.   The wrinkle inspection apparatus according to claim 3, wherein the laser pointer forms a slit-like reference mark.   The adjustment sheet attached to the support roll in the method for adjusting the position of the calibration roll to which the adjustment sheet for adjusting the imaging condition is attached in the wrinkle inspection apparatus according to claim 1. The reference light is irradiated by the reference light irradiation device obliquely from above and obliquely below to form reference marks spaced in the roll axis direction at both ends of the adjustment sheet, and each reference mark is a reference of the adjustment sheet The reference light irradiation direction is adjusted and maintained so as to be positioned on the line, and the reference light is irradiated on the adjustment sheet of the calibration roll by the reference light irradiation device so that the reference mark is positioned on the reference line. A method for adjusting a calibration roll for a wrinkle inspection apparatus, wherein the position of the roll is adjusted.

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