JPH04131759U - Foreign matter inspection device for transparent transparent objects - Google Patents

Abstract

(57) [Summary] [Structure] A pallet 2 made of an opaque material is equipped with an amorphous translucent body 1 of irregular shape and transparent, and an edge mask portion 21 for masking the edge 13 is arranged around the pallet 2. It has a notch 22. The light source 3 illuminates the transparent transparent body 1 mounted on the pallet from below, and with the edge 13 masked, a camera 41 captures a superimposed image of the pallet 2 and the transparent transparent body 1. The presence of foreign matter 12 is determined. [Effect] Erroneous recognition due to shadows caused by the edge 13 and uncertain irradiation conditions can be eliminated.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a foreign matter inspection device for transparent or semi-transparent objects, especially transparent or semi-transparent irregular objects. A foreign object inspection device for flat transparent bodies that inspects the presence of foreign substances contained in flat transparent bodies. related.

0002

[Conventional technology]

Examples of transparent or translucent irregular shaped translucent bodies include translucent electric fans. There are fans, etc.

0003 Optical methods are used to inspect foreign substances such as air bubbles contained in such shaped translucent materials. There is a method. In this method, the inspection object is illuminated with light and an image is taken by an imaging camera. The presence or absence of foreign objects was determined by analyzing this image data.

0004 In the case of such optical processing, the shadow of the edge showing the outline of the inspection object is also included in the image data. , which causes errors in determining the presence or absence of foreign objects. Therefore, the edges are treated as non-inspection areas and are masked to shield them from the projected light. There is.

[0005] Conventionally, masking of non-inspection areas is performed using an image processing device that acquires images of the inspection object. is equipped with a mask memory to store the mask area and to store it in the non-inspection area. The opaque parts that could be exposed were eliminated from the electrical circuit.

[0006]

[Problem that the idea aims to solve]

In the conventional mask area processing method described above, the electrical circuit of the image processing device is The drawback is that it requires more memory and the circuit becomes more complex. In addition, an imaging camera and The disadvantage is that if the positional relationship of the inspection object is misaligned, the correct mask effect cannot be obtained. There is.

[0007] The purpose of this invention is to eliminate the above-mentioned drawbacks, have a simple configuration, and use an imaging camera and inspection system. A foreign object inspection device for oblique transparent objects that can significantly suppress the effects of deviations in the relative position of objects. Our goal is to provide the following.

[0008]

[Means to solve the problem]

The device of this invention has an irregular shape and is transparent or translucent. A foreign matter inspection device for a flat transparent body that inspects the presence or absence of foreign matter contained in a light body, the device comprising: Mapping the edge of a translucent object and a predetermined area of the edge into an optically opaque state. The pallet to be mounted by scrolling and the oblique transparent body mounted on the pallet are placed in a downward direction. A light source that irradiates from and an image processing device that determines the presence or absence.

[0009] Further, the device of the present invention is configured to fit the flat transparent body into the pallet in a flat manner for storage. an opaque edge mask portion with a stepped structure and a boundary between said edge mask portions; It has a configuration in which a notch is provided.

0010

【Example】

Next, the present invention will be explained with reference to the drawings.

[0011] FIG. 1 is a block diagram of a foreign matter inspection device for a transparent transparent body according to an embodiment of the present invention.

0012 The embodiment shown in FIG. An opaque edge mask part 21 on which the body 1 and the transparent transparent body 1 are stably mounted, and an edge mask It is held by a conveying function (not shown) provided with a notch 22 bordering on the screen portion 21. pallet 2, light source 3 that irradiates pallet 2 with light from below, and light source 3 that illuminates pallet 2 Connectivity analysis of images including the camera 4 that images the pallet 2 equipped with the transparent translucent body 1 is possible. An image processing device 41 is provided.

[0013] Next, the operation of this embodiment will be explained.

[0014] The pallet 2 is a rectangular transparent body having an outer shape of an edge 13 including foreign matter 11 and scratches 12. 1 is mounted horizontally, and an opaque edge mask portion 21 is disposed on which the edge mask 1 is mounted horizontally. Light is irradiated from the light source 3 onto the rectangular transparent body 1 which is mounted on the mask section 21 and whose edges are masked. It has a notch 22 through which it can be directly irradiated.

[0015] FIG. 2 is a cross-sectional view showing the state in which the flat transparent body is mounted on the edge mask portion 21 of FIG. 1. It is a diagram.

[0016] The pallet 2 is equipped with the transparent translucent body 1 and placed at a position facing the camera 41 and the light source 3. The camera 41 captures an image of the scene illuminated by the light source 3 while moving.

[0017] The data captured by the camera 41 is processed by the image processing device, and is shown in FIGS. ) outputs an image 10 of a polarized transparent body as shown in FIG. Figure 3(a) shows the deficiencies represented by diagonal lines. Shaped transparent body image 101 excluding the shadow 103 of the transparent palette 2 and the shadow of the edge 13 Furthermore, a shadow 102 of the foreign object 11 is displayed in the image 10 of the oblong transparent body.

[0018] The shadow 102 of the foreign object 11 in FIG. 3(a) is extracted by the image processing device 4. .

[0019] The image data captured by the camera 41 is processed by the image processing device 4 to create connectivity between the image data. When a connectivity analysis is performed focusing on this, the result is displayed as shown in FIG. 3(b). Shaped transparent body 1 When the foreign object 11 is included in the image data, the connectivity between the image data becomes Disconnection data other than those that have been proven is determined to include scratches and correspond to foreign objects. and is displayed as shown in FIG. 3(a). In other words, the mask region including edges and Scratches 12 other than the previously known connectivity data obtained from the shape of the transparent body This includes the shadow 104 of the scratch 12 as a shape disturbance due to This makes it easy to check for the presence of foreign matter.

[0020] FIG. 4 is shown in comparison with FIGS. 3(a) and 3(b).

[0021] FIG. 4 is an image taken without using the pallet 2, and in this case, the foreign object 1 1 shadow 105, edge 13 shadow 106, and scratch 12 shadow 107 are displayed. , the shadow 106 of the edge 13 and the shadow 107 of the scratch 12 vary depending on the imaging state. Therefore, further investigation such as confirmation of location data is required.

[0022]

[Effect of the idea]

As explained above, the present invention uses an opaque object that suppresses edge imaging on the inspection object. By superimposing the pallets and taking images, as long as the object to be inspected is within the screen, inspection is possible. This eliminates the need for false detection of foreign objects even when the object's position changes, and it is also possible to use an amorphous mask machine. This has the advantage that it is possible to use an image processing device that does not have any functions.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a foreign matter inspection device for a rectangular transparent body according to an embodiment of the present invention.

2 is a partial cross-sectional view of the flat transparent body 1 of FIG. 1 mounted on a pallet 2. FIG.

3(a) shows an example of an image including a foreign object in the embodiment of FIG. 1, and FIG. 3(b) shows an example of an image without a foreign object.

FIG. 4 is a diagram showing an example of an image of a conventional transparent transparent body.

[Explanation of symbols]

1 Shaped transparent body 2 Palette 3 Light source 4 Image processing device 11 Foreign matter 12 Scratches 13 Edge 21 Edge mask section 22 Notch 101 Shaped transparent body image 102 Shadow of foreign object 11 103 Palette 2 shadow 104 Shadow of scratch 12 105 Shadow of foreign object 11 106 Shadow of Edge 13 107 Shadow of scratch 12

Claims (2)

[Scope of utility model registration request] 1. A foreign matter inspection device for a flat transparent body that inspects the presence or absence of foreign matter contained in a transparent or semi-transparent flat transparent body with an irregular external shape, which a pallet on which the edge of a transparent body and a predetermined range of edge surroundings are masked in an optically opaque state; a light source that irradiates the flat transparent body mounted on the pallet from below; 1. A foreign matter inspection device for a flat transparent body, comprising: an image processing device that images an irradiation scene and determines the presence or absence of foreign matter in the flat transparent body. 2. The pallet is provided with an opaque edge mask portion having a stepped structure into which the transparent translucent body is fitted and held in a plane, and a notch with the edge mask portion as a boundary. 2. A foreign matter inspection device for a shaped translucent body according to claim 1.