JPH04161805A - Quality judging apparatus for plate-shaped work - Google Patents

Abstract

PURPOSE:To judge a width of a plate material by arranging a first light source for emitting light linearly parallel to a direction of transporting the plate material, a line sensor sandwiching a transporting location and a second light source and a line sensor at the right angle to the direction of a transportation while an arithmetic section and a judging section are provided. CONSTITUTION:A plate material 1 is transported and when the plate material is not inclined, a first light source 3 parallel is intercepted at the same position. When the plate material 1 is transported being inclined, it is deviated in position by a portion corresponding to the inclination thereof in a direction of transportation. An arithmetic section 7 compares information from a line sensor 5 for detecting a state of inclination to find the state of inclination. When the plate material is fed to a downstream posi tion, light of a second light source 4 incident into a line sensor 6 for detecting lateral dimensions is intercepted by a lateral dimensional portion at the right angle to the direction of transporting the plate material. Dimension is calculated with the arithmetic section 7 to be corrected based on inclination angle information of the plate material 1 and the results are compared with a specified range by a judging section 10 to judge the quality thereof. With such an arrangement, a width of the plate can be selected efficiently and accurately.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a device for determining the quality of a plate-shaped workpiece.

Conventional Techniques In recent years, roofing materials have been produced using methods such as punching. Because plate-shaped workpieces such as roofing materials sometimes have insufficient width or are partially missing, visual inspections are performed on the production line to exclude such defective products.

Problems to be Solved by the Invention However, in the conventional visual inspection described above, oversights may occur, and it is difficult to determine the width dimension when a plate-like workpiece is conveyed in an oblique state. In addition, there was a problem that it was not possible to cope with an increase in the conveyance speed.

The present invention solves the above-mentioned problems, and provides an apparatus for determining whether a plate-like work is good or bad, which can efficiently and reliably discriminate a plate-like work whose width is insufficient or partially missing. The purpose is to

Means for Solving the Problems In order to solve the above problems, the first means of the present invention is to provide a transport device that transports a plate-like workpiece in a fixed direction, and to move a first light source that emits linear light in the transport direction. a second light source that emits light in a linear manner, a plurality of line sensors for detecting the tilt state being arranged in parallel along the line, and a plurality of line sensors for detecting the inclination state being arranged so as to face the first light source across the conveyance location of the plate-like workpiece; are arranged perpendicular to the transport direction, and a line sensor for lateral dimension detection is arranged so as to face the second light source across the transport location of the plate-shaped work, and the line sensor for lateral dimension detection is arranged so as to be perpendicular to the transport direction. The horizontal dimension of the plate-shaped work perpendicular to the transport direction is calculated based on the data from the sensor, and the inclination state of the plate-shaped work is calculated from the signal from the line sensor for detecting the inclination state. A calculation unit is provided that calculates the width dimension of the plate-shaped workpiece by correcting the horizontal dimension perpendicular to the conveyance direction based on the tilted state data, and the width dimension data of the plate-shaped workpiece output from the calculation unit is set in advance. The present invention is provided with a determination unit that compares and determines whether or not the work is within a predetermined range, and determines that the plate-shaped work is defective if it is outside the predetermined range.

Further, the second means of the present invention is to provide a conveyance device for conveying a plate-shaped work in a fixed direction, and to provide an illumination device that irradiates the entire plate-shaped work on the conveyance device with light almost uniformly. An imaging device for detecting the area of the irradiated plate-like workpiece is provided, an image processing unit is provided that calculates the area of the plate-shaped workpiece based on data from the imaging device, and the plate-shaped workpiece output from the image processing unit is A determination unit is provided which compares the area data of the workpiece with a predetermined value set in advance, and determines that the plate-shaped workpiece is a defective product with chipping if the area data is smaller than the predetermined value.

Effect When the plate-like workpiece is transported to the position where the first light source is disposed by the above-mentioned first means, if the plate-like workpiece is transported in a non-inclined state, it is arranged in parallel. The plurality of first light sources installed are blocked at the same position, but if the plate-shaped workpiece is transported in an inclined state, the position in the transport direction will shift by the amount of the inclination. By comparing the data from each line sensor, the amount of deviation can be calculated and the tilted state of the plate-shaped workpiece can be detected. When the plate-like workpiece is transported to the position where the second light source is installed, the light from the second light source that was incident on the line sensor for lateral dimension detection is directed in the transport direction of the plate-like workpiece. Since only the orthogonal lateral dimension is obstructed, the calculation section calculates the lateral dimension perpendicular to the transport direction of the plate-shaped workpiece based on the data from the line sensor for lateral dimension detection, and this value is used as the Correction is made based on the data of the inclination angle of the plate-shaped work, and the accurate width dimension of the plate-shaped work is calculated. Then, in the determination section, it is compared and determined whether the width dimension data of this plate-shaped work is within a predetermined range set in advance, and if it is outside the predetermined range, this plate-shaped work is determined to be defective. , within a predetermined range, this plate-shaped workpiece is determined to be a good product.

Further, when the plate-shaped work is transported to the position where the illumination device is arranged, the plate-shaped work is imaged by the imaging device, and the entire image of the plate-shaped work is captured by the image processing unit. is output to. Image processing During burial, the area of the plate-shaped workpiece is calculated by image processing, and in the determination section, the area data of the plate-shaped workpiece is compared with a predetermined value set in advance, and if it is smaller than the predetermined value, the plate-shaped workpiece is missing. It is determined that it is a defective product, and if it is equal to or higher than a predetermined value, it is determined that it is a good product without chipping.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIG. 1, reference numeral 1 denotes a plate-shaped workpiece for roofing material or the like produced by punching or the like, and is conveyed in the direction a at a speed of, for example, 40 m/min by a conveying device 2 consisting of a belt conveyor or the like. At the location where the transport device 2 is provided, first and second light sources 3 and 4 that emit light upward in a linear manner are provided.
are arranged, two first light sources 3 are arranged in parallel along the transport direction, and a second light source 4 is arranged perpendicular to the transport direction at a downstream side of the first light source 3 in the transport direction. It is located in Correspondingly, a CCD image sensor 5 as a line sensor is disposed above the first light source 3 so as to face each first light source 3, and a line sensor is disposed above the second light source 4. The two CCD image sensors 6 are arranged so as to face the second light source 4.
Ru. The CCD image sensor 6 is arranged so as to be biased to both sides, so that it can detect with high resolution the vicinity of the position where the transported plate-shaped work l passes through both measuring sections. The CCD image sensor 5 and the CCD image sensor 6 are connected to a calculation unit 7 that calculates the width dimension of the plate-shaped workpiece 1, and this calculation unit 7 is connected to a discrimination unit 10 for determining defective products.

In addition, above the transport device 2 at a separate location, as shown in FIG. A CCD camera 12 serving as an imaging device for taking an image of the plate-like workpiece 1 that has been transported to a transport location is disposed facing downward.

This CCD camera 12 is connected to an image processing section 13 that calculates the area of the plate-shaped work 10, and this image processing section 13 is connected to a discriminating section IO for discriminating defective products.

Next, the effect of the above configuration will be explained.

When the plate-shaped work l is transported to the position where the first light source 3 is disposed, the light from the first light source 3 that has been incident on the CCD image sensor 5 is blocked.

At this time, if the plate-shaped workpiece 1 is transported in a non-inclined state, it will be blocked by the plurality of first light sources 3 arranged in parallel or at the same position, but if the plate-shaped workpiece 1 is transported in a tilted state When the board is transported, the position in the transport direction is shifted by the amount of the inclination (shift amount b) as shown in FIG. The inclination angle of the shaped workpiece 1 is calculated.

When the plate-like work l is transported to the position where the second light source 4 is disposed, the light from the second light source 4 that has been incident on the CCD image sensor 6 is blocked.

At this time, as shown in FIG.
The shielded distance 11 in the field of view of the image sensor 6, I! 2 is detected, and the distance B outside the field of view in the CCD image sensor 6 is added, and this added value L (that is, L=11 +12 +B)
It is calculated as the horizontal dimension perpendicular to the conveyance direction.

Then, this addition value is corrected based on the inclination angle of the plate-shaped work 1 ≠ - 2, and the accurate width dimension of the plate-shaped work 1 is calculated.

Further, when the plate-shaped work 1 comes to the irradiation point by the illumination device 11, the entire image of the plate-shaped work 1 is outputted from the CCD camera 12 to the image processing unit 13, and the image processing unit 13 processes the plate-shaped work 1. The area of is calculated.

These width dimension data and area data of the plate-like workpiece 1 are compared with a predetermined non-defective dimension range and non-defective product area in the discrimination section 10, and the above-mentioned plate-like workpiece l
It is determined that the product is non-defective only when the width dimension is within the non-defective dimension range and the area of the plate-shaped work 1 is equal to or larger than the non-defective product area. On the other hand, if the width dimension of the plate-shaped work l deviates from the non-defective product dimension range, it is determined that the width dimension is defective, and if the area of the plate-shaped work 1 is smaller than the non-defective product area, it is determined that it is a defective product with chipping. Appropriate processing is performed in subsequent steps.

In the above embodiment, the first light source 3 and the CCD image sensor 5 for detecting the inclination angle of the plate-shaped workpiece 1 are arranged on the upstream side, and the second light source 3 and the CCD image sensor 5 for detecting the width dimension of the plate-shaped workpiece l are arranged on the upstream side. Although the light source 4 and the CCD image sensor 6 are arranged on the downstream side, they are not limited to this, and may be arranged in the opposite direction.

Effects of the Invention As described above, according to the present invention, a plurality of first light sources that emit light in a linear manner are arranged in parallel along the conveyance direction, and the first light sources are arranged across the conveyance location of the plate-like workpiece. By arranging a plurality of line sensors for detecting the inclination state so as to face each other, the inclination angle of the plate-shaped workpiece is detected, and the light is emitted linearly downstream of the first light source in the conveying direction. By arranging a second light source perpendicular to the transport direction and arranging a line sensor for detecting the lateral dimension so as to face the second light source across the transport location of the plate-shaped work, Since the configuration is configured to detect the width dimension of a plate-shaped workpiece, it is possible to accurately and quickly measure the width dimension of a plate-shaped workpiece even if the workpiece is tilted, and it is possible to make a pass/fail judgment based on the width dimension of the plate-shaped workpiece. can be performed accurately and efficiently.

In addition, an imaging device for detecting the area of the plate-shaped workpiece on the conveyance device is provided, and the area of the plate-shaped workpiece is calculated by image processing based on the data from this imaging device. is compared with a predetermined value, and if it is smaller than the predetermined value, it is determined that the plate-shaped work is a defective product with chipping. Therefore, it is possible to accurately and accurately judge whether the plate-shaped work is defective or defective based on the chipping of the plate-shaped work. High-speed detection is possible, which improves production efficiency.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a width dimension determination location in an apparatus for determining the quality of a plate-shaped workpiece according to an embodiment of the present invention, FIG.
The figure is a diagram for explaining the operation of the device for determining the quality of the same plate-shaped workpiece. 1... Plate-shaped workpiece, 2... Conveyance device, 3... First
4... Second light source, 5... CCD image sensor (line sensor for detecting tilt state), 6... C
CD image sensor (line sensor for horizontal dimension detection),
7... Arithmetic unit, 10... Discrimination unit, 11... Illumination device, 12... CCD camera (imaging device at>, 13...
・Image processing section.

Claims (1)

[Claims] 1. A conveyance device for conveying a plate-shaped workpiece in a fixed direction is provided,
A plurality of first light sources emitting linear light are arranged in parallel along the conveyance direction, and a plurality of line sensors for detecting a tilt state are arranged opposite to the first light sources across the conveyance location of the plate-shaped workpiece. A second light source that emits light in a linear manner is arranged perpendicular to the conveying direction, and a line for lateral dimension detection is arranged so as to face the second light source across the conveying location of the plate-shaped workpiece. A sensor is installed, and the horizontal dimension perpendicular to the conveyance direction of the plate-like work is calculated based on the data from the line sensor for detecting the horizontal dimension. A calculation unit is provided that calculates the inclination state of the workpiece, corrects the horizontal dimension of the plate-shaped workpiece perpendicular to the conveying direction based on the data of the inclination state, and calculates the width dimension of the plate-shaped workpiece. A determination unit is provided that compares and determines whether the output width dimension data of the plate-shaped workpiece falls within a predetermined range set in advance, and determines that the plate-shaped workpiece is defective if it is outside the predetermined range. A device for determining the quality of plate-shaped workpieces. 2. Provide a transport device that transports the plate-shaped workpiece in a fixed direction,
An illumination device is provided that irradiates light almost uniformly onto the entire plate-shaped workpiece on the conveyance device, and an imaging device for area detection is provided to image the plate-shaped workpiece illuminated by the illumination device, and data from this imaging device is provided. An image processing unit is provided to calculate the area of the plate-shaped workpiece by, and the area data of the plate-shaped workpiece outputted from the image processing unit is compared with a predetermined value set in advance.
A device for determining the quality of a plate-shaped workpiece, characterized in that a determination unit is provided that determines that the plate-shaped workpiece is a defective product with a chip when the value is smaller than a predetermined value.