JPH04118260U - Discrimination device for castings, etc. - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an identification device that can reliably identify castings, etc., regardless of the condition of the fabric. [Structure] Multiple convex portions 2 integrally formed on the detected object
The linear light 4 is irradiated across the barcode 2, which is an aggregate of the barcodes a to 2e, and the angle is such that the linear light 4 forms stepped portions of high brightness portions corresponding to the convex portions 2a to 2e. The barcode 2 is read by photographing an image of the barcode 2 and performing image processing on the high-brightness portion of the video signal.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a discriminating device for castings, etc., and in particular to conveyor rails such as automobile cylinder blocks. This is useful when applied to the discrimination of castings, etc. flowing over the inlet.

0002

[Conventional technology]

For example, an automobile engine manufacturing factory has a cylinder block transport line. Therefore, multiple types of cylinder blocks often flow together on this conveyance line. stomach. Therefore, at the entrance or exit of such a conveyance line, a cylinder block is required. It is necessary to determine the type of material and then sort it by type.

0003 In order to carry out the above-mentioned work smoothly, a number is cast into the casting or mold in advance. Read this number and perform post-processing (palletizing, deburring, assembly, and other sorting). Character reading devices are being developed to inform the work contents during processes such as Partly because the characters are not consistent, it has not yet been put into practical use.

0004 Therefore, conventionally, cast or cast products (hereinafter referred to as The above-mentioned sorting work was carried out using a discriminating device for castings, etc.).

[0005] The above-mentioned device for discriminating castings, etc., uses a bar mark, which is a convex part, on the castings, etc., being conveyed through the conveyor line. By forming a barcode and irradiating this barcode with light diagonally from a light emitting source, At the same time as forming a shadow of this barcode, this shadow is photographed with a TV camera and It is designed to identify the type of casting etc. by performing information processing. Ru.

[0006]

[Problem that the idea aims to solve]

Discrimination devices related to the conventional technology use shadows formed on castings, etc., so black When identifying objects with black paint or objects with black fabric, check the difference in density between the shadow and the fabric. In this case, there is a problem that the identification accuracy becomes unstable.

[0007] In view of the above-mentioned conventional technology, the present invention has been developed to ensure that castings, etc. It is an object of the present invention to provide a discriminating device that can actually discriminate.

[0008]

[Means to solve the problem]

The structure of the present invention to achieve the above purpose is as follows:

[0009] In order to identify the castings or cast products conveyed on the conveyance line, A barcode, which is a convex part formed integrally on the cast product, a light emitting source that emits linear light that traverses the barcode; At an angle that creates a step in the high brightness area due to linear light based on the barcode. a photographing means for photographing a high-brightness part; Information expressed by barcodes by processing linear light image information obtained by photographing means and an image processing means for determining.

0010

[Effect]

According to the present invention having the above configuration, image information of a high-brightness portion obtained by the photographing means is obtained. The barcode can be read based on the number and spacing of the steps, so image processing means The type of casting etc. is determined by predetermined image processing in .

[0011]

【Example】

Embodiments of the present invention will be described in detail below based on the drawings.

0012 FIG. 1 is an explanatory diagram conceptually showing an embodiment of the present invention when viewed from the side, and FIG. FIG. 2 is an explanatory diagram conceptually showing a plan view of the embodiment. As shown in both figures, A cast cylinder block 1, which is the object to be detected, is formed by integrally casting the outer peripheral surface of the cylinder block 1. It has a barcode 2 consisting of convex portions 2a, 2b, 2c, 2d, and 2e. vinegar That is, the barcode 2 is formed as a collection of convex parts 2a to 2e, and the convex parts 2a to 2 The number of e's and the spacing between them express a specific meaning of the model number, mold number, etc. There is. The cylinder block 1 is placed on a roller conveyor 7 and conveyed.

[0013] A laser gun 3, which is a source, emits linear light 4 that spreads over a predetermined width in a horizontal plane into a bar code. diagonally forward with respect to the transport direction A of the cylinder block 1 so as to irradiate the cylinder block 1 toward the cylinder block 2. It is arranged. Thus, the linear light 4 traverses the barcode 2, and a line is formed in this traversal portion. A high brightness area is formed.

[0014] The TV camera 5, which is a photographing means, has a stepped portion of linear light 4 based on the barcode 2. It is arranged so that the linear light that crosses the barcode 2 is photographed at an angle that Ru. In this embodiment, the horizontal plane containing the linear light 4 and the optical axis 6 of the TV camera 5 intersect at an angle. They are arranged at positions where they intersect at θ (>0).

[0015] As a result, the TV camera 5 shoots an image as shown in FIG. That is, linear A high brightness area 9 formed by irradiating the barcode 2 with the light 4 (the thick part in FIG. 3) In the line portion), the portions corresponding to the convex portions 2a to 2e of the cylinder block 1 are different from other portions. There are step portions 9a, 9b, 9c, 9d, and 9e that are higher than that. Therefore, Takaki Analyzing step portions 9a to 9e of degree portion 9 is equivalent to analyzing barcode 2. .

[0016] The image processing device 8 processes the video signal of the TV camera 5, that is, as shown in FIG. The barcode 2 is solved by determining the number and mutual spacing of the stepped portions 9a to 9e of the high brightness portion 9. The bar code 2 is analyzed and a discrimination signal S representing the meaning of the bar code 2 is sent out.

[0017] A series of processing modes in the image processing device 8 are based on the barcode 2 shown in FIG. The flowchart shown in FIG. 5 corresponds to the window of the display (not shown). .

The window W ₀ shown as an arrow in the vertical direction in FIG. 4 is used to determine a reference point for detecting the barcode 2, and the window W ₀ and the high-brightness portion 9 in FIG. The intersection is set as a reference point P, and windows W ₁ , W ₂ , W ₃ , W ₄ , W ₅ shown as left and right arrows in FIG. If there is a white pixel in each of these windows W ₁ to W ₅ , that is, if the windows W ₁ to W ₅ intersect with the high-brightness portion 9, then the convex barcode 2 will appear in the window W ₁ to W ₅ . Processing is performed assuming that parts 2a to 2e exist.

[0019] According to the above embodiment, the high brightness portion illuminated by the linear light that traverses the barcode 2 9 corresponds to the convex portions 2a to 2e of the cylinder block 1 forming the barcode 2. The high brightness portion 9 is photographed with the TV camera 5 from a position having the stepped portions 9a to 9e. ing. Therefore, the video signal that is the output signal of the TV camera 5 is the barcode 2 The same information as that is included in the stepped portions 9a to 9e. Thus, the image processing section 8 Then, the video signal is processed and a discrimination signal S representing the meaning of barcode 2 is sent out. .

[0020] By performing the window processing as described above, the predetermined position of cylinder 1 at the time of detection is It is possible to absorb some deviation from the

[0021] The discrimination signal S can be used in various ways, for example, in the conveyance/sorting shown in FIG. It becomes useful when applied to the system.

[0022] As shown in FIG. 6, in the above conveyance/sorting system, the cylinder block 1 are placed on the roller conveyor 7 and conveyed on the conveyance line, and then Sorted onto either roller conveyor 10 or 11. In other words, the cylinder block The truck 1 comes into contact with a stopper 12 and is stopped on the roller conveyor 7. In this state, The image processing device 8 processes the video signal of the TV camera 5 and sends out a discrimination signal S.

[0023] The control panel 13 controls the palletizer robot 1, which is a sorting means, in response to the discrimination signal S. Drive and control 4. In this way, the palletizer robot 14 receives instructions from the control panel 13. According to the order, hold the cylinder block 1 on the roller conveyor 7 with the hand 14a. Either pallet 1 is lifted up and conveyed to either roller conveyor 10 or 11. Place it on 5,16.

[0024] In the above embodiment, the object to be detected was a cast cylinder block 1. However, if the object to be detected can form a three-dimensional barcode, which is a convex part, a special There are no restrictions. Another example is a plastic molded product with an integrated barcode. It can be mentioned as follows.

[0025]

[Effect of the idea]

As specifically explained above in conjunction with the embodiments, according to the present invention, the biological The presence or absence of convexities can be reliably detected regardless of the condition of the fabric, such as the color of the background. Therefore, the barcode, which is an aggregate of the protrusions, can be accurately determined.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram conceptually showing an embodiment of the present invention when viewed from the side.

FIG. 2 is an explanatory diagram conceptually showing a plan view of the embodiment.

FIG. 3 is an explanatory diagram showing an image taken by a TV camera in the embodiment.

FIG. 4 is an explanatory diagram conceptually showing window processing in the image processing section in the embodiment.

FIG. 5 is a flowchart showing a processing procedure in the image processing section.

FIG. 6 is a block diagram showing a conveyance/sorting system to which the above embodiment is applied.

[Explanation of symbols]

1 cylinder block 2 Barcode 2a-2e Convex portion 3 Laser gun 4 Linear light 5 TV camera 9 High brightness area 9a-9e Stepped section

Claims (1)

[Scope of utility model registration request] 1. A bar code, which is a convex portion integrally formed on the casting or cast product, is irradiated with a linear light that traverses the bar code in order to identify the casting or cast product being conveyed on the conveyance line. a light emitting source that captures the image, a photographing means that photographs the high-brightness portion at an angle such that a stepped portion of the high-brightness portion is formed by the linear light based on the barcode, and processing of image information of the linear light obtained by the photographing means. and an image processing means for discriminating information represented by a barcode.