KR20010079284A - Desired Grain Sorting out of Miscellaneous Grain Crop by color reflected from the Mirror - Google Patents

Abstract

PURPOSE: A color selector for minor cereals by using a mirror is provided to perceive and select the front and rear of a selected object at the same time by using a CCD camera with improving the background in an existing color selector. CONSTITUTION: The color selector for minor cereals by using the mirror includes selected objects(1), a conveying belt(2), light source(3), a CCD camera(5), a direct light power intercepting plate(7), background flats(9) and a background assistant mirror(10). The back ground flats(9) are composed of the "L" type member. The background assistant mirror(10) is fixed with the / type on the open part of the background flats(9) in order to perceive the front and rear image of the selected objects(1) by using the CCD camera(5). The upper and lower light source(3) is installed for supplying the appropriate light source of the photoelectricity selecting portion. The direct light power intercepting plate(7) prevents the direct investigation to the background and the CCD camera(5).

Description

{Desired Grain Sorting out of Miscellaneous Grain Crop by color reflected from the Mirror}

As a device for sorting granular products such as beans, red beans, and corn into good and defective products, the so-called color sorter for grains is known.The grain color sorter is a drop-type grain color sorter and belt type grains depending on the method of transferring the sorted material. There is a color sorter, and there are color sorters for single and double-sided grains according to the image acquisition method.

1 and 2 show an example of a conventional color sorter for belt type grains. In Fig. 1, the selected object 1 is supplied on the conveying belt 2, and is conveyed in the horizontal direction by the conveying belt 2, and then the good product and the defective product in the photoelectric sorting section provided at the end of the belt. Is screened. The photoelectric selection unit is mainly composed of a light source 3, a CCD camera 5, and a defect-free air spray nozzle 6.

The sorter shown in Fig. 1 has the advantage of using the surface of the conveying belt 2 as a background, which does not need to provide a background separately. As a result, the surface of the belt is dirty and the detection accuracy is lowered, and the color of the belt must also be changed as the type of the object 1 is changed. To solve the above problem is the color sorter for grain shown in Fig. 2, the background (8) is independently installed at the end of the conveying belt (2), even if the type of the object (1) is changed, the background (8) By replacing the color of the belt by replacing), the conventional color sorter for sorting has reduced the accuracy of selection by recognizing and selecting only the cross-sectional image of the object (1). Grain color separators with cameras installed on the upper and lower portions of the photoelectric separators have also been developed and sold, but this is not economically practical.

The present invention devised to solve the above problems, in the conventional belt type color sorting machine for grains, the background is improved by recognizing and selecting the front and back of the object to be selected simultaneously using a single CCD camera To provide a sorter.

1 and 2 are schematic configuration diagrams of a conventional color sorter for grains.

3 is a schematic configuration diagram of a color sorter for grains using the mirror of the present invention.

Figure 4 is a perspective view showing the arrangement of the conveying belt and the background in the color sorter for grains using the mirror of the present invention.

5 is a cross-sectional view showing the state of the background in the present invention.

6 is an exemplary view of the front and rear images of the object to be obtained through the CCD camera in the present invention.

* Explanation of symbols for main parts of the drawings

1: Selected object 2: Transfer belt

3: light source 4: air spray nozzle for background cleaning

5: CCD camera 6: defect removal air spray nozzle

7: direct light blocking plate 8: background

9: Background flat 10: Background auxiliary mirror

11: polarizing filter 12: grain transfer guide

13: Front image part 14: Back image part

In order to achieve the above object, the background, background flat (9) used in the color sorter for grains using the mirror of the present invention In order to recognize the image of the front and back of the object 1 to be picked up by using a single CCD camera 5 The background auxiliary mirror 10 is placed on the open portion of the background flat 9 having the shape of. The background flat (9) and the background auxiliary mirror (10) The upper and lower light sources 3 installed in order to supply an appropriate light source of the photoelectric sorting unit are provided in the background and the CCD camera 5. The direct light source blocking plate 7 is installed in each light window as a means to prevent direct irradiation.

In the background of the present invention, the background flat 9 is colored in a predetermined color according to the type of the object 1 to be selected. Coloring may be performed by painting, plating or other common coloring methods. The auxiliary mirror 10 is configured by overlaying the polarizing filter 11 to prevent the light source from directly reflecting the reflected light to the CCD camera 5 by the phenomenon of reflection directly from the surface of the background auxiliary mirror (ie, mirror surface radiation or specular). Be sure to

Furthermore, the cleaning member of the air jet nozzle 4 is brought close to the background flat 9 and the background auxiliary mirror 10 so that the machine stops automatically after a certain period of time so that the compressed air is strongly sprayed to be cleaned automatically. .

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 3 is a schematic structural diagram of an embodiment of a color sorter for a mixed grain using a mirror according to the present invention, wherein the selective object 1 is a hopper (not shown). From the end of the conveying belt (2) after being fed to the grain conveying guide (12) on the conveying belt (2), and conveyed in the horizontal direction by the grain conveying guide (12) on the conveying belt (2). It is emitted to a photoelectric selection unit configured adjacent to the end, and this selective object 1 passes over a background composed of a background flat 9 and a background auxiliary mirror 10, facing at right angles to the background. The visible CCD camera 5 acquires the front and back images of the object 1 to sort out defective and good products. The photoelectric sorting unit mainly consists of a light source 3, a CCD camera 5, a defect-free air spray nozzle 6, a background flat 9, and a background auxiliary mirror 10. ) And a direct light source blocking plate (7).

4 is a perspective view showing the state of the conveying belt 2 and the background in the present invention, the object to be separated 1 falls in a parabolic-shaped drop trajectory so that the background is slightly separated from the end of the conveying belt 2. It is comprised so that it may be located slightly below the horizontal position of the conveyance belt 2. By such a configuration, the CCD camera 5 is configured such that the front and rear images of the object 1 can be acquired at close positions on the same line by looking at the background.

Fig. 5 is a structural diagram of the background of the present invention, in which the background flat 9 is The background auxiliary mirror 10 is connected to the open part of the background flat 9 so as to simultaneously acquire images of the front and the back of the object 1 using a single CCD camera 5. Angle from 155 ° to 165 ° Consists in the form of. In order to prevent the light source of the mirror reflection component generated from the surface of the background auxiliary mirror by the light source 3 installed on the upper and lower parts, the plastic or the surface of the background auxiliary mirror 10 is prevented from being sent to the CCD camera 5. The polarizing filter 11 made of a glass material is overlaid.

FIG. 6 is an embodiment of the front and rear images of the object 1 to be recognized by one CCD camera. An embodiment of the portion A includes a background flat 9 and a background auxiliary mirror 10. FIG. It is an image obtained when the selection (1) does not pass, and when the selection (1) passes over the background, as shown in the example of part B, the front image (13) An image is formed on the rear image unit 14, and the CCD camera 5 is configured as a system for acquiring and analyzing the front and rear images of the object 1.

The operation by the above configuration will be described. When the light is irradiated onto the object 1 from the light source 3 of the photoelectric selection unit, the light reflected from the object 1 is detected by the CCD camera 5. And an electrical signal corresponding to each is generated. At this time, the obtained image is acquired simultaneously with the front and rear images of the object 1 to be picked up by one CCD camera (5). If the images of the front image part 13 and the rear image part 14 acquired at the same time are recognized as one blood selection object 1 and any defect is recognized in the image of the front or back parts 13 and 14, The sorting object 1 is recognized as a defective article, and based on this analysis signal, the defective article is removed by the defective removing air spray nozzle 6 to be sorted as a good article and a defective article.

According to the present invention, in the structure of the photoelectric selection unit for acquiring images of the front and the back of the object 1 using a single CCD camera 5 in a grain color sorter, the object 1 Comprising a background consisting of a background flat (9) and a background auxiliary mirror (10) to form the front and back of the image in the same position adjacent to the same line, install a light source (3) in the upper and lower parts to obtain a suitable light source, The installed light source is provided with a direct light source blocking plate (7) in each light source (3), in order to prevent direct light irradiation to the CCD camera (5) or background, the polarization filter (11) in the background auxiliary mirror (10) By covering the structure, the selected object 1 was accurately selected using one CCD camera 5. Thus, the present invention has a considerable effect on cost reduction by having the same sorting power with one CCD camera 5 without using two CCD cameras 5 to obtain images of the front and back of the object 1 to be picked up. It is.

Claims (6)

In order to irradiate the light source to the object to be transported by the conveying belt and to detect the light reflected from the object, the light source and CCD camera are composed at the end of the belt, and the defect removal air injection nozzle is operated based on the detection signal. In the belt type grain color sorter for removing particles, the color for grains using a mirror comprising a background flat and a background auxiliary mirror at the end of the belt, and a direct light source blocking plate formed at a light source installed at the top and the bottom of the belt. Selector. The background flat of claim 1 wherein Consists of the shape of, and the background auxiliary mirror on the open part of the background flat. Color sorter for grains using a mirror, characterized in that the configuration. According to claim 2, The installation angle of the background auxiliary mirror is a color sorter for grains using a mirror, characterized in that consisting of 155 ° ~ 165 ° relative to the plane. The color sorter for grains using a mirror according to claim 1, wherein a polarizing filter for preventing scattering of the light source is formed on the surface of the background auxiliary mirror in the background. The color discriminator for grains using a mirror according to claim 4, wherein the polarization filter used in the background is made of glass or plastic. A color sorter for grains using a mirror, characterized in that the system for recognizing and screening the image of the front and back of the object to be obtained by one CCD camera through a background consisting of a background flat and a background auxiliary mirror as a single object.