Device for improving uniformity of LED light source
By designing a device to improve the uniformity of LED light sources in cigarette packaging equipment, the problem of uneven light is solved by using scattered light and reflective light sources, and the accuracy of cigarette pack quality detection is improved.
Patent Information
- Application Number
- CN202420497295.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-14
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-03-14
AI Technical Summary
During the high-speed cigarette packaging process, uneven light causes uneven light on the surface of the cigarette pack, affecting the accuracy of the quality detection of the cigarette pack.
Design a device to improve the uniformity of LED light sources, including a cavity, a plurality of LED light groups and a reflector. The LED light groups are arranged on both sides of the cavity, the optical axis is parallel to the optical axis of the photographing assembly, and the reflector is arranged on the cigarette bag. On both sides of the conveying track, the scattered light and reflective light sources are used to evenly illuminate the smoke packet.
Through uniform illumination, the bright and dark contrast of the cigarette bag surface is reduced, the quality of image acquisition and detection accuracy are improved, and the situation of errors and omissions are reduced.
Smart Images
Figure CN222519220U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cigarette production equipment, and in particular relates to a device for improving the uniformity of an LED light source. Background Art
[0002] The Focke F5 packaging machine is a high-speed hard-box packaging machine imported from Germany, with a packaging speed of up to 450 packs / min. In high-speed production mode, machine vision online inspection is essential to ensure product quality. Machine vision inspection has high requirements for light sources and lighting methods. The wavelength, brightness, and uniformity of the light source used all affect the quality of image acquisition, thereby affecting the imaging effect and detection accuracy of the entire inspection system.
[0003] Due to the different patterns and base colors of the appearance of different product packaging materials, as well as the influence of factors such as lighting changes and shadows, uneven lighting will appear on the surface of the cigarette package, which will mislead the appearance quality inspection of the cigarette package to a certain extent, and especially cause great interference to the cigarette package image processing. Utility Model Content
[0004] In view of the problems in the related art, the utility model proposes a device for improving the uniformity of LED light source, which solves the defects of missed rejection and wrong rejection in online detection of cigarette package quality.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A device for improving the uniformity of an LED light source, the device comprising: a cavity, a plurality of LED light groups and a reflector; a shooting assembly arranged in the cavity; a plurality of LED light groups respectively arranged on both sides of the cavity, the optical axes of the LED light groups being parallel to the optical axis of the shooting assembly; the cavity and the reflector respectively arranged on both sides of a cigarette pack conveying track; another group of cavities, a plurality of LED light groups and a reflector are symmetrically arranged with respect to the cigarette pack conveying track, and two shooting assemblies are arranged opposite to each other and their optical axes are parallel to each other.
[0007] Preferably, two LED light groups and one LED light group are respectively provided on both sides of the cavity.
[0008] Preferably, the structure of the cavity is 15mm×10mm×24mm.
[0009] Preferably, the LED lamp group includes a lampshade and 9 LED bulbs linearly arranged on the lampshade.
[0010] Preferably, the lampshade is made of acrylic and has a radial diameter of 10 mm.
[0011] Preferably, the distance between the two reflective plates is equal to the width of the cigarette pack.
[0012] Preferably, the positions of the two reflective plates are adjustable.
[0013] Preferably, the distance between the two LED light groups and the cigarette pack is greater than the distance between one LED light group and the cigarette pack.
[0014] Preferably, the LED lamp group is fixed to the cavity via a fixing plate.
[0015] The beneficial effects of the utility model are as follows: the utility model installs an LED light group on the shooting component to emit scattered light, and the scattered light is reflected by a reflector to evenly project the light source onto the cigarette pack. At the same time, the incident angle of the light source of the LED light group is adjusted to adapt to different auxiliary materials and base colors, so as to improve the imaging quality of the camera component, provide high-quality images for the visual inspection system, and improve the inspection progress. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 The utility model is a schematic diagram of the structure of a device for improving the uniformity of LED light sources.
[0017] Figure 2 The utility model is a schematic diagram of the structure of an LED lamp group of a device for improving the uniformity of an LED light source.
[0018] In the figure: 1. first LED light group, 2. second LED light group, 3. reflector, 4. cavity, 5. fixing plate, 6. shooting assembly, 7. cigarette package conveying track, 8. fixing nut, 9. LED lamp beads, 10. LED lamp cover, 11. color mark sensor, 12. inlet guide roller, 13. three-phase motor, 14. negative pressure fan, 15. ultrasonic sensor, 16. negative pressure cavity, 17. outlet guide roller. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0020] like Figure 1 and Figure 2As shown, a device for improving the uniformity of LED light sources includes an LED light group, a reflector 3 and a cavity 4. A shooting component 6 is placed in a closed cavity 4. In this embodiment, the material of the cavity 4 is aluminum alloy. The cavity 4 is a cuboid with a length, width and height of 15mm×10mm×24mm respectively. There are two shooting components 6, which are divided into an upper shooting component and a lower shooting component. Both adopt oblique angle shooting and are arranged above and below the cigarette pack conveying track 7, and are axially symmetrically distributed. The upper shooting component is located above the cigarette pack conveying track 7, at an angle of about 45° to the cigarette pack conveying track 7, and the lower shooting component is located behind the cigarette pack conveying track 7, at an angle of about 45° to the cigarette pack conveying track 7.
[0021] The LED light group is a cylinder, and each LED light group is composed of 9 LED lamp beads 9, which are arranged linearly. The LED lamp beads 9 are placed in the LED lamp cover 10. The LED lamp cover 10 is made of cylindrical acrylic material with a diameter of 10mm, which is conducive to the uniform scattering of the light source. The LED light groups are fixed on the cavity 4 and are respectively located on both sides of the shooting component 6. The first LED light group 1 is installed on the left side of the shooting component 6 above the cigarette package conveying track 7, and the second LED light group 2 is installed on the right side to form an LED light group. In this embodiment, the overall position of the first LED light group 1 is about 70mm higher than the shooting component 6, and the overall position of the second LED light group 2 is about 50mm higher than the shooting component 6, and they are arranged in an "L" shape. The LED light groups are all parallel to the shooting component 6, that is, the optical axis of the LED light group is parallel to the optical axis of the shooting component 6. The reflectors 3 are rectangular parallelepiped, respectively located above and below the cigarette pack conveying track 7, and parallel to the cigarette pack conveying track 7. In this embodiment, the distance between the reflectors 3 and the cigarette pack conveying track 7 is 30 mm, and the horizontal distance between the two sets of reflectors 3 is the width of the cigarette pack, which is 66 mm. The reflectors 3 can be adjusted left and right by loosening the fixing nuts 8 to find the best reflection effect.
[0022] When the device is in working state, the visual inspection system first locates the cigarette package to be inspected. After the cigarette package enters the inspection area, the camera assembly 6 is triggered to take a photo, and the LED light group is triggered to flash at the same time. The LED light source is scattered to the surface of the cigarette package and the reflector 3, so that the surface of the cigarette package is evenly illuminated, the light contrast is reduced, and the lighting is uniform. Through the cooperation of the LED light group and the camera assembly 6, the position of the light source is adjusted by adjusting the position of the LED light group. The camera assembly senses the cigarette package at a certain angle, analyzes the cigarette package image with the help of image analysis software, and removes unqualified cigarette packages.
[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A device for improving the uniformity of LED light sources, characterized in that: The device comprises: a cavity, a plurality of LED light groups and a reflector; a shooting component is arranged in the cavity; a plurality of LED light groups are respectively arranged on both sides of the cavity, and the optical axes of the LED light groups are parallel to the optical axis of the shooting component; the cavity and the reflector are respectively arranged on both sides of a cigarette pack conveying track; another group of cavities, a plurality of LED light groups and a reflector are symmetrically arranged with respect to the cigarette pack conveying track, and two shooting components are arranged opposite to each other and the optical axes are parallel to each other.
2. The device for improving the uniformity of an LED light source according to claim 1, characterized in that: Two LED light groups and one LED light group are respectively arranged on both sides of the cavity.
3. The device for improving the uniformity of LED light source according to claim 1, characterized in that: The structure of the cavity is 15mm×10mm×24mm.
4. The device for improving the uniformity of LED light source according to claim 1, characterized in that: The LED lamp group includes a lampshade and 9 LED bulbs linearly arranged on the lampshade.
5. The device for improving the uniformity of LED light source according to claim 4, characterized in that: The lampshade is made of acrylic and has a radial diameter of 10 mm.
6. The device for improving the uniformity of LED light source according to claim 1, characterized in that: The distance between the two reflective plates is equal to the width of the cigarette pack.
7. The device for improving the uniformity of LED light source according to claim 1, characterized in that: The positions of the two reflectors can be adjusted.
8. The device for improving the uniformity of LED light source according to claim 1, characterized in that: The distance between the two LED light groups and the cigarette pack is greater than the distance between one LED light group and the cigarette pack.
9. The device for improving the uniformity of LED light source according to claim 1, characterized in that: The LED lamp group is fixed on the cavity through a fixing plate.