Device for collecting images and removing sundries in tobacco leaves by adopting area-array camera

Abstract

The utility model discloses a device for collecting images and removing sundries in tobacco leaves by adopting an area-array camera, which is arranged on a tobacco sheet conveying pipeline and comprises perspective glass, the area-array camera, a lighting source, a box body, a blowing device, the tobacco sheet conveying pipeline, a sundries discharge channel, a background plate and an airlock. The background plate is made of stainless steel, the surface of the background plate is subjected to sand blasting treatment, and the perspective glass and the background plate are installed by inclining towards the outer side of the tobacco flake conveying pipe by 10-20 degrees. The device has the advantages that a background light source is replaced by the stainless steel sand blasting plate, the service life is greatly prolonged, meanwhile, the long-term stability of the impurity removing effect is greatly improved, and the perspective glass and the background plate incline towards the outer side of the tobacco flake conveying pipe by 10-20 degrees to avoid interference so as to achieve a better imaging effect.

Description

Technical Field

[0001] This utility model relates to a device that uses an area array camera to acquire images and remove impurities from tobacco leaves. More specifically, in the field of tobacco impurity removal, this utility model achieves a long-term and stable impurity removal effect by replacing the background light source with a stainless steel background plate and by tilting the viewing glass and the background plate. Background Technology

[0002] Currently known tobacco cleaning equipment uses a background light source to achieve consistent background color. However, the background light source itself generates heat, causing slight color changes that interfere with image imaging. Furthermore, the light source gradually dims and fades over time, affecting the overall image and reducing the effectiveness of debris removal. This invention replaces the background light source with a stainless steel sandblasted background plate. To prevent reflected light from entering the camera, the viewing glass and background plate are installed at a 10°-20° angle. This prevents reflected light from the background plate from entering the lens of the area scan camera when the installation angle is ≤10°, causing bright spots on the LED beads of the lighting source in the image and interfering with debris identification. Additionally, the viewing glass is installed at <20° to save installation space and create a more compact structure. The background plate is installed at <20° to prevent the image background from being too dark, which would interfere with image processing. Using a stainless steel sandblasted plate as the background has a significantly longer lifespan than a background light source and eliminates the problem of background color changes due to temperature variations. It also avoids the problem of the background light source dimming and fading over time, ensuring the long-term stability of the equipment's cleaning effect. Summary of the Invention

[0003] The problem to be solved by this utility model is to propose an improvement or replacement solution to address the shortcomings of the prior art, especially by replacing the background light source with a stainless steel sandblasted background plate, which greatly extends the service life of the background. The transparent glass is installed at an angle greater than 10° to avoid the reflection angle of light. The background plate is installed at an angle of 10°-20° to avoid the reflection angle of light and to prevent the image background from being too dark, which would interfere with the image processing results.

[0004] To solve the above problems, the present invention adopts the following solution: a device for acquiring images and removing impurities from tobacco sheets using an area array camera, characterized in that it includes an area array camera, an illumination source, a blowing device, and an impurity discharge channel arranged sequentially along the tobacco sheet conveying direction; the illumination source is located above and below the area array camera; an opening is provided on the tobacco sheet conveying pipe corresponding to the area array camera, and a transparent glass is provided at the opening; a background plate is provided on the other side of the tobacco sheet conveying pipe corresponding to the transparent glass; both the transparent glass and the background plate are installed at an angle towards the outside of the tobacco sheet conveying pipe; the blowing device is located behind the area array camera and is arranged on the tobacco sheet conveying pipe; the impurity discharge channel is connected to the tobacco sheet conveying pipe and is located opposite the blowing device.

[0005] Furthermore, the device for acquiring images and removing impurities from tobacco leaves using an area array camera is characterized in that a housing is provided outside the area array camera and the illumination source, and the housing and the transparent glass together form a sealed dustproof space.

[0006] Furthermore, the device for acquiring images using an area array camera and removing impurities from tobacco leaves is characterized in that the background plate is a sandblasted stainless steel background plate.

[0007] Furthermore, the device for acquiring images and removing impurities from tobacco leaves using an area array camera is characterized in that an airlock is provided below the impurity discharge channel.

[0008] Furthermore, the device for acquiring images and removing impurities from tobacco leaves using an area array camera is characterized in that both the transparent glass and the background plate are installed at an angle of 10° to 20° toward the outside of the tobacco sheet conveying pipe, with 15° being the optimal angle.

[0009] The technical effects of this utility model are as follows: the perspective glass 2 is installed at an angle of 10°-20°, which avoids the reflected light from the illumination source on the perspective glass entering the lens of the area array camera when the installation angle is ≤10°, resulting in bright spots of the illumination source LED beads appearing in the image. At the same time, the installation angle <20° can save installation space.

[0010] The background panel should be installed at a 10°-20° angle to avoid the reflected light from the lighting source entering the lens of the area scan camera when the installation angle is ≤10°, which would cause bright spots of the lighting source LED beads to appear in the image. At the same time, an installation angle <20° can prevent the background color from being too dark and close to black tobacco leaves, which would be detrimental to the identification of black tobacco leaves.

[0011] The background panel is made of stainless steel with a sandblasted surface. The light diffuses across the sandblasted surface to achieve color consistency.

[0012] This invention replaces the background light source with a stainless steel sandblasted background plate. To prevent reflected light from entering the camera, the viewing glass and background plate are installed at a 10°-20° angle. This prevents reflected light from the background plate from entering the lens of the area scan camera when the installation angle is ≤10°, which would cause bright spots on the LED beads of the lighting source in the image and interfere with object recognition. Furthermore, installing the viewing glass at <20° saves installation space and makes the structure more compact. Installing the background plate at <20° prevents the image background from being too dark, thus avoiding interference with image processing results. Using a stainless steel sandblasted plate as the background also significantly extends its lifespan compared to a background light source, eliminates the problem of background color changes due to temperature variations, and avoids the issue of background light source decay and dimming over long-term use, ensuring the long-term stability of the equipment's impurity removal effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 Light path diagram for a transparent glass and background panel tilted ≤10°;

[0015] Figure 3 Light path diagram for when the perspective glass and background panel are tilted >10°;

[0016] Figure 4 A rendering showing the actual effect of the lens-transparent glass and background panel tilted at ≤10°.

[0017] Figure 5 Actual effect diagram showing the lens through which the glass and background panel are tilted >10°;

[0018] Figure 6 This is an image showing the actual effect when the background is tilted at 15°.

[0019] Figure 7 This is an image showing the actual effect when the background is tilted at an angle greater than 20°.

[0020] In the diagram: 1-Inlet of the smoke sheet to be removed, 2-Transparent glass, 3-Area array camera, 4-Light source, 5-Box, 6-Pulse blowing device, 7-Smoke sheet conveying pipe, 8-Smoke sheet, 9-Debris, 10-Debris discharge channel, 11-Background plate, 12-Airlock. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] like Figure 1 As shown, a device for acquiring images and removing impurities from smoke sheets using an area array camera includes a smoke sheet inlet 1, a viewing glass 2, an area array camera 3, an illumination source 4, a housing 5, a blowing device 6, a smoke sheet conveying pipe 7, smoke sheets 8, impurities 9, an impurity discharge channel 10, a background plate 11, and an airlock 12.

[0023] The impure smoke sheet 8 enters through the impure smoke sheet inlet 1. Under the transport of air, the smoke sheet 8 moves upward along the smoke sheet conveying pipe 6. When it passes through the transparent glass 2 and the background plate 11, the illumination source 4 provides illumination for the area array camera 3. The area array camera 3 captures images of the impure smoke sheet flow in the pipe through the transparent glass 2 with the background plate 11 as the background. The image is identified by the image processing software and image processing model pre-made in the camera. The coordinate signal of the identified foreign object is directly output to the blowing device 6. The blowing device 6 blows the foreign object 9 into the foreign object discharge channel 10. The foreign object is discharged from the equipment through the air lock 12. The qualified smoke sheet continues to move upward into the next process.

[0024] The device is arranged in sequence along the tobacco sheet conveying direction, including an area array camera 3, an illumination source 4, a blowing device 6, and a debris discharge channel 7. The illumination source 4 is located above and below the area array camera 3 and is sealed in a housing 5. The tobacco sheet conveying pipe 7 corresponding to the area array camera 3 has an opening. A transparent glass 2 is installed at the position of the housing 5 corresponding to the opening. In a preferred embodiment, the transparent glass 2 is installed at an angle of 10°-20°. A background plate 11 is provided on the other side of the tobacco sheet conveying pipe 7 corresponding to the transparent glass 2. In a preferred embodiment, the background plate 11 is installed at an angle of 10°-20°. The blowing device 6 is located behind the area array camera 3. A debris discharge channel 10 is provided on the opposite side of the blowing device. An airlock 12 is provided below the discharge channel 10.

[0025] As a preferred option, the transparent glass 2 and the background panel 11 are installed at an angle of 10°-20°, by Figure 2 As shown in the optical path diagram at a 10° tilt angle, when the tilt angle of the transparent glass 2 or the background plate 11 is ≤10°, the reflected light from the illumination source 4 enters the lens of the area array camera 3. This results in the LED beads in the illumination source 4 appearing bright in the image, interfering with the identification of debris. Figure 3 As shown in the optical path diagram with a tilt angle > 10°, when the tilt angle of the transparent glass 2 or the background plate 11 is > 10°, the reflected light all appears outside the lens, therefore no LED bright spots will appear in the image. The actual verification image is shown below. Figure 4 When the tilt angle is ≤10°, there are obvious bright spots in the image. Figure 5 For tilt angles greater than 10°, the image should have uniform color and no bright spots. As a preferred solution, such as... Figure 6 When the background panel 11 is tilted at 15°, the image brightness of the background panel 11 is moderate, with no reflective bright spots and good color uniformity, which is beneficial for image recognition. Figure 7 When the angle between the background panel 11 and the background panel 11 is greater than 20°, the background becomes too dark. A dark background color, similar to black tobacco leaves, hinders their identification. Furthermore, the larger the installation angle of the viewing glass 2, the more space it occupies. Therefore, an installation angle between the viewing glass 2 and the background panel 11 of 10°-20° is ideal.

[0026] As a preferred embodiment, the background plate 11 of the device is made of stainless steel plate with a sandblasted surface. The light source 4 illuminates the sandblasted surface to cause diffuse reflection, thereby achieving uniformity of background color.

[0027] The device can consist of multiple area array cameras 3 evenly distributed along the width of the pipe. By increasing the number of area array cameras, the image area of ​​each camera is reduced, thereby improving the image clarity.

Claims

1. A device for acquiring images using an area array camera and removing impurities from tobacco leaves, characterized in that, The device includes an area array camera, an illumination source, a blowing device, and a debris discharge channel arranged sequentially along the tobacco sheet conveying direction. The illumination source is positioned above and below the area array camera. An opening is provided on the tobacco sheet conveying pipe corresponding to the area array camera, and a transparent glass is installed at the opening. A background plate is provided on the other side of the tobacco sheet conveying pipe corresponding to the transparent glass. Both the transparent glass and the background plate are installed at an angle of 10° to 20° towards the outside of the tobacco sheet conveying pipe. The blowing device is located behind the area array camera and is installed on the tobacco sheet conveying pipe. The debris discharge channel is connected to the tobacco sheet conveying pipe and is located opposite the blowing device.

2. The apparatus for acquiring images using an area array camera and removing impurities from tobacco leaves according to claim 1, characterized in that, The area array camera and the illumination source are enclosed in a housing, which together with the transparent glass forms a sealed dustproof space.

3. The apparatus for acquiring images using an area array camera and removing impurities from tobacco leaves according to claim 1, characterized in that, The background panel is a sandblasted stainless steel background panel.

4. The apparatus for acquiring images using an area array camera and removing impurities from tobacco leaves according to claim 1, characterized in that, An airlock is installed below the debris discharge channel.

5. The apparatus for acquiring images using an area array camera and removing impurities from tobacco leaves according to claim 1, characterized in that, Both the transparent glass and the background panel are installed at a 15° angle toward the outside of the smoke sheet conveying pipe.

Images