Polishing device and detection device for transparent detection object with pattern
By combining a horn-shaped light-emitting plate, the problem of overlapping patterns on transparent objects interfering with recognition was solved, achieving uniform lighting and clear image acquisition.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN SANLI INTELLIGENT EQUIPMENT TECHNOLOGY CO LTD
- Filing Date
- 2024-01-24
- Publication Date
- 2026-04-21
AI Technical Summary
Existing detection systems often fail to properly handle the lighting of transparent objects, resulting in overlapping patterns on the front and back sides, which interferes with the recognition effect.
The combination of the first, second, third and fourth lighting plates forms a trumpet-shaped structure to ensure that the object being tested receives uniform light on the side facing the small aperture, thus preventing pattern overlap.
Uniform illumination of transparent objects was achieved, avoiding pattern overlap and improving the clarity of image acquisition and recognition accuracy.
Smart Images
Figure CN224152349U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of detection devices, and in particular to a light-emitting device and a detection device for patterned transparent objects. Background Technology
[0002] Existing detection systems primarily identify objects by acquiring multiple images of the object's surface. Algorithms then determine the presence of defects in these images. This places high demands on the quality of the acquired images, requiring high definition and freedom from interference. To improve image clarity, surface brightness is typically increased, resulting in lighting treatments. However, for transparent objects, improper lighting can lead to several issues. First, the transparency can cause the opposite side of the object to reflect the external environment onto the front, introducing interference into the front image. Second, for partially transparent bottle-shaped or tubular objects, which often feature patterns, improper lighting can cause these patterns to appear on the opposite side, resulting in overlapping patterns on the front and interfering with image recognition. Utility Model Content
[0003] The purpose of this invention is to provide a lighting device for transparent objects with patterns. It can be used to provide lighting for transparent objects with patterns. When the transparent object passes through the detection channel, the positional distribution between the first, second, third and fourth lighting plates can achieve optimal adjustment of the light source of the object, so that the side of the object facing the small diameter can be evenly illuminated.
[0004] This utility model also proposes a detection device for patterned transparent objects, which is equipped with the above-mentioned lighting device.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] A lighting device for detecting patterned transparent objects includes: a detection base and a lighting assembly;
[0007] The lighting assembly includes: a first lighting plate, a second lighting plate, a third lighting plate, and a fourth lighting plate;
[0008] The first and second lighting plates are spaced apart to form a lighting channel; the interval between the first and second lighting plates gradually increases, forming a large-diameter opening at the end with the largest interval and a small-diameter opening at the end with the smallest interval; the detection base is installed below the lighting channel; the third lighting plate is disposed above the lighting channel; the light sources of the first, second, and third lighting plates are located within the lighting channel; the fourth lighting plate is spaced apart from the lighting channel and forms a detection passage; the small-diameter opening, the large-diameter opening, and the fourth lighting plate are distributed sequentially.
[0009] Optimally, the first and second lighting plates form an angle of 30-90°.
[0010] A detection device for patterned transparent objects includes: an image acquisition device and a lighting device; the lighting device is the aforementioned lighting device for patterned transparent objects.
[0011] The image acquisition device is located at the small-diameter opening.
[0012] Optimally, it may also include: an image acquisition moving component;
[0013] The output end of the image acquisition moving component is connected to the image acquisition device and is used to drive the image acquisition device to move, so that the lens of the image acquisition device moves through the small aperture.
[0014] Optimally, the image acquisition motion component includes: an image driving track, an image driving slider, and an image motion driver;
[0015] The image driving track is mounted on the detection base; the image acquisition device is mounted on the image driving slider; the image driving slider is movably mounted on the image driving track; the output end of the image motion driver is connected to the image driving slider and is used to drive the image driving slider to move along the length direction of the image driving track.
[0016] Optimally, it may also include: a feeding device;
[0017] The conveying end of the feeding device moves through the detection passage.
[0018] Optimally, it may also include: a feeding device and a position sensing device;
[0019] The conveying end of the feeding device moves through the detection channel; the positioning sensor is communicatively connected to the image acquisition moving component; the image acquisition moving component drives the image acquisition device to move repositionably.
[0020] Ideally, the image acquisition device moves synchronously with the conveying end of the feeding device when it moves in one of the movement directions.
[0021] Optimally, it may also include: an image recognition device; the image recognition device being communicatively connected to the image acquisition device.
[0022] Compared with the prior art, one of the above technical solutions has the following beneficial effects:
[0023] This solution provides a lighting device for transparent objects with patterns. It can be used to provide lighting for transparent objects with patterns. When the transparent object passes through the detection channel, the positional distribution between the first, second, third and fourth lighting plates achieves optimal adjustment of the light source for the object. This ensures that the side of the object facing the small aperture receives uniform light, while preventing the pattern on the side away from the small aperture from interfering with recognition. This solves the problem of existing methods where poor lighting position of the object causes overlapping patterns on the front and back sides of the transparent object during image acquisition, leading to interference with recognition. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the structure of one embodiment of the detection device;
[0025] Figure 2 This is a schematic diagram of one embodiment of the lighting device;
[0026] Figure 3 This is a schematic diagram of the structure of one embodiment of the lighting component;
[0027] in:
[0028] 02. Feeding device; 03. Lighting device; 04. Image acquisition device; 06. Detection base; 07. Image acquisition moving component; 08. Position sensing device; 09. Image recognition device;
[0029] Lighting assembly 3; lighting channel 30; first lighting plate 31, second lighting plate 32, third lighting plate 33, fourth lighting plate 34; large diameter port 301; small diameter port 302; inspection passage 303;
[0030] Image drive track 71, image drive slider 72, image movement driver 73. Detailed Implementation
[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," "inner side," "outer side," "inner end," "outer end," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis. In the description of this utility model, unless otherwise stated, "multiple" means two or more.
[0033] like Figure 1-3 A lighting device for detecting patterned transparent objects includes: a detection base 06 and a lighting component 3;
[0034] The lighting assembly 3 includes: a first lighting plate 31, a second lighting plate 32, a third lighting plate 33, and a fourth lighting plate 34;
[0035] The first lighting plate 31 and the second lighting plate 32 are spaced apart to form a lighting channel 30; the interval between the first lighting plate 31 and the second lighting plate 32 gradually increases, forming a large diameter opening 301 at the end with the largest interval in the lighting channel 30, and a small diameter opening 302 at the end with the smallest interval; the detection base 06 is installed below the lighting channel 30; the third lighting plate 33 is disposed above the lighting channel 30; the light sources of the first lighting plate 31, the second lighting plate 32 and the third lighting plate 33 are located within the lighting channel 30; the fourth lighting plate 34 is spaced apart from the lighting channel 30 and forms a detection passage 303; the small diameter opening 302, the large diameter opening 301 and the fourth lighting plate 34 are distributed sequentially.
[0036] This solution provides a lighting device for transparent objects with patterns. It can be used to provide lighting for transparent objects with patterns. When the transparent object passes through the detection channel 303, the positional distribution between the first lighting plate 31, the second lighting plate 32, the third lighting plate 33 and the fourth lighting plate 34 can achieve optimal adjustment of the light source of the object. This allows the side of the object facing the small diameter 302 to receive uniform light, while preventing the pattern on the side of the object away from the small diameter 302 from interfering with the recognition. This solves the problem of existing methods where poor lighting position of the object causes the patterns on the front and back sides of the transparent object to overlap and interfere with the recognition during image acquisition.
[0037] Specifically, a first lighting plate 31 and a second lighting plate 32 are spaced apart to form a lighting channel 30; a third lighting plate 33 is disposed above the first lighting plate 31 and the second lighting plate 32, thereby covering the opening above the lighting channel 30; the first lighting plate 31 and the second lighting plate 32 are disposed below the detection base 06, thereby covering the opening below the lighting channel 30; simultaneously, the interval between the first lighting plate 31 and the second lighting plate 32 gradually increases from one end to the other, thereby gradually increasing the inner diameter of the lighting channel 30, and the lighting channel 30 has a trumpet-shaped structure, with a large-diameter opening 301 and a small-diameter opening 302; the first lighting plate 31... The light sources of the first light plate 31, the second light plate 32, and the third light plate 33 are arranged in the lighting channel 30; while the fourth light plate 34 is arranged at a position away from the lighting channel 30, forming a detection passage 303 between them; the object to be detected is conveyed to a position that passes through the detection passage 303 and is located in a straight line between the fourth light plate 34 and the large diameter opening 301; at this time, an image acquisition device 04 can be arranged at the small diameter opening 302; the image acquisition device 04 acquires the image of the object to be detected facing the small diameter opening 302; at this time, since the interval between the first light plate 31 and the second light plate 32 gradually increases, the first light plate 31 and the second light plate 32 are essentially tilted towards the object to be detected, therefore the first The first lighting plate 31 can direct the light source at an angle to one side of the image to be imaged, while the second lighting plate 32 can direct the light source at an angle to the other side of the image. The third lighting plate 33 and the detection base 06 can block light from escaping from the top and bottom of the lighting channel 30, thus preventing the light source from being emitted towards the non-detection surface. In this way, the surface of the object being detected is illuminated by the first lighting plate 31, the second lighting plate 32, and the third lighting plate 33, ensuring uniform illumination of the front of the object facing the large-diameter aperture 301, thereby facilitating a clear image at the small-diameter aperture 302. Simultaneously, the small-diameter aperture 302, the large-diameter aperture 301, and the fourth lighting plate 34 are arranged sequentially, and the fourth lighting plate 34 also... Light is emitted towards the back of the object being detected, and the back of the object is illuminated, with some of the light hitting the back of the pattern on the front. Thus, the pattern on the front of the object is the brightest and has the largest lighting range under the illumination of the first lighting plate 31, the second lighting plate 32, and the third lighting plate 33, while the pattern on the back of the object near the fourth lighting plate 34 is less bright and has a smaller area. Therefore, there is a large difference in light intensity between the pattern on the front and the pattern on the back of the object, and the pattern on the back of the object will not appear in the front of the object. As a result, the clearest image can be obtained at the small aperture 302, which solves the problem of uneven illumination of the object causing the patterns on the front and back of the transparent side to overlap and interfere with recognition during image acquisition.
[0038] Optimally, the first light-reflecting plate 31 and the second light-reflecting plate 32 form an angle of 30-90°.
[0039] The angle between the first lighting plate 31 and the second lighting plate 32 can preferably be 30-90°. Within this angle range, the light source in the lighting channel 30 provides better uniformity of illumination on the object being tested and better effect on preventing pattern overlap. In particular, the performance is optimal when the angle between the first lighting plate 31 and the second lighting plate 32 is 60°.
[0040] A detection device for patterned transparent objects includes: an image acquisition device 04 and a lighting device 03; the lighting device 03 is the aforementioned lighting device for patterned transparent objects.
[0041] The image acquisition device 04 is located at the small diameter port 302.
[0042] This solution provides a detection device for transparent objects with patterns. The image acquisition device 04 is positioned at the small-diameter opening 302 of the lighting device 03. Under the premise that the lighting device 03 provides uniform illumination to the object, it can acquire an image of the object facing the small-diameter opening 302. The acquired image of the transparent object has no pattern overlap and will not interfere with intelligent recognition. The image acquisition device 04 is a known mechanism with image capture and recording functions, such as an industrial camera, digital camera, mobile phone, or webcam.
[0043] Optimally, it also includes: an image acquisition moving component 07;
[0044] The output end of the image acquisition moving component 07 is connected to the image acquisition device 04 and is used to drive the image acquisition device 04 to move, so that the lens of the image acquisition device 04 moves through the small aperture 302.
[0045] The position of the image acquisition device 04 can be fixed or adjustable after disassembly as needed. In the optimal embodiment, the image acquisition device 04 is movable. The image acquisition moving component 07 is a known mechanism with a driving and moving function, such as a cylinder, a moving trolley, a combination of a lead screw and a motor, or a robotic arm structure. Thus, the image acquisition moving component 07 can drive the image acquisition device 04 to move, thereby moving the lens of the image acquisition device 04 through the small diameter opening 302. In this solution, the lighting device 03 has already uniformly illuminated the object to be detected, that is, the position of the lighting is fixed. The images may overlap at some angles but not at others. When the image acquisition device 04 passes through the small diameter opening 302, the image acquisition device 04 can acquire images of the object to be detected at different positions of the small diameter opening 302, thereby acquiring images from more angles, improving the accuracy of intelligent recognition, and increasing the recognition error tolerance. For example, if one image has overlapping patterns but another image does not, more images can be analyzed to determine whether it is a defect or whether it is pattern overlap.
[0046] Optimally, the image acquisition moving component 07 includes: an image driving track 71, an image driving slider 72, and an image moving driver 73;
[0047] The image driving track 71 is mounted on the detection base 06; the image acquisition device 04 is mounted on the image driving slider 72; the image driving slider 72 is movably mounted on the image driving track 71; the output end of the image movement driver 73 is connected to the image driving slider 72 and is used to drive the image driving slider 72 to move along the length direction of the image driving track 71.
[0048] The image motion driver 73 is a known mechanism with a driving motion function, such as a cylinder, which only needs to drive the image driving slider 72 to move. The image motion driver 73 drives the image driving slider 72 to move, which in turn moves the image acquisition device 04 on the image driving slider 72 to pass through the small diameter 302. The image driving track 71 has a guiding effect on the image driving slider 72, so that the image acquisition device 04 moves to the same position each time, thereby improving the stability of image acquisition.
[0049] Optimally, it also includes: a feeding device 02;
[0050] The conveying end of the feeding device 02 moves through the detection passage 303.
[0051] The feeding device 02 is used to convey the object to be tested. The object is placed at the conveying end of the feeding device 02, and the conveying end moves the object through the testing passage 303, thereby moving the object between the large diameter opening 301 and the fourth lighting plate 34. This facilitates the image acquisition device 04 to acquire images of the object passing through the large diameter opening 301, realizing a fully automatic image acquisition function. The feeding device 02 is a known mechanism with a driving movement function, such as a conveyor belt structure, a conveyor roller structure, a conveyor robotic arm, or a conveyor trolley, as long as it conveys the object to be tested through the large diameter opening 301.
[0052] Optimally, it also includes: a feeding device 02 and a position sensing device 08;
[0053] The conveying end of the feeding device 02 moves through the detection channel 303; the positioning sensor 08 is communicatively connected to the image acquisition moving component 07; the image acquisition moving component 07 drives the image acquisition device 04 to move repositionably.
[0054] A position sensor 08 can be installed at any position in the detection device. The position sensor 08 is communicatively connected to the image acquisition moving component 07. When the position sensor 08 senses that the image acquisition moving component 07, the object to be detected, or other preset mechanisms have arrived or passed by, it can feed back the position information to the image acquisition moving component 07. The image acquisition moving component 07 mainly drives the image acquisition device 04 to move through the small diameter opening 302. When the image acquisition moving component 07 receives the position information, it responds and starts, thereby driving the image acquisition device 04 to move. This allows the object to move in the same direction as the image acquisition device 04 when it passes through the detection channel 303. The object does not need to stay in the detection channel 303 for a long time, thus shortening the detection time. Furthermore, since the image acquisition device 04 acquires the image of the object while moving through the small diameter opening 302, the position of the object receiving light changes during the movement. Therefore, the image acquisition device 04 can acquire images from multiple angles under the premise of uniform lighting, which can improve the detection error tolerance, improve the detection accuracy, and shorten the detection dwell time. Subsequently, the image acquisition moving component 07 drives the image acquisition device 04 to move in a resettable manner, thereby resetting the position of the image acquisition device 04 to facilitate the identification of the next detection object.
[0055] In practical applications, the forward movement speed of the object to be inspected can be calculated based on the production capacity cycle time of the entire line and the specifications of the object to be inspected. The required moving distance of the object to be inspected can also be calculated. Then, based on the image acquisition width set by the image acquisition device 04, the camera frame rate required for the object to be inspected during its movement can be calculated. Finally, the frame rate parameters of the image acquisition device 04 can be modified in real time to ensure that the object to be inspected captures the entire inspection surface within a limited travel distance.
[0056] The communication connection method mentioned here refers to the communication established between connected devices through signal transmission and interaction, which can be divided into wired connection and wireless connection; wired connection is such as conventional data cable connection; wireless connection is such as conventional WiFi, Bluetooth, infrared, NFC, etc.
[0057] Ideally, the image acquisition device 04 moves synchronously with the conveying end of the feeding device 02 when it moves in one of the moving directions.
[0058] The image acquisition device 04 and the conveying end of the feeding device 02 can convey objects at different speeds. In the optimal embodiment, during the process of driving the image acquisition device 04 to move repositionably, the image acquisition device 04 will move synchronously with the conveying end of the feeding device 02 in one of the moving directions. This makes the speed of the image acquisition device 04 in one of the moving directions the same as the conveying speed of the object being detected driven by the feeding device 02. The image acquisition device 04 and the feeding device 02 are relatively stationary. The image acquisition device 04 can capture the entire process of the object being detected passing through the large-diameter port, thereby improving the detection accuracy.
[0059] Optimally, it may also include: an image recognition device 09;
[0060] The image recognition device 09 is communicatively connected to the image acquisition device 04.
[0061] Image recognition device 09 is a known device with image recognition capabilities, such as a computer, motherboard, mobile phone, or tablet computer. The image recognition method is also known, primarily depending on the software installed in image recognition device 09. For example, image recognition device 09 can preset defect features, receive images acquired by image acquisition device 04, and then identify whether the content in the image is the same as or similar to the preset features, thereby determining whether the object being inspected has a defect. Of course, image recognition device 09 can also have some image processing capabilities, such as desaturating the image and determining whether the object has a defect based on grayscale levels.
[0062] This solution is preferably applied to defect detection of patterned transparent tubular objects. It can make the side of the transparent tubular object facing the small diameter 302 receive light evenly, thereby avoiding the problem of overlapping patterns on the front and back sides of the transparent tubular object that would interfere with identification.
[0063] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. An illumination device for detecting a patterned transparent test object, characterized in that include: Testing base and lighting components; The lighting assembly includes: a first lighting plate, a second lighting plate, a third lighting plate, and a fourth lighting plate; The first and second lighting plates are spaced apart to form a lighting channel; the interval between the first and second lighting plates gradually increases, forming a large-diameter opening at the end with the largest interval and a small-diameter opening at the end with the smallest interval; the detection base is installed below the lighting channel; the third lighting plate is disposed above the lighting channel; the light sources of the first, second, and third lighting plates are located within the lighting channel; the fourth lighting plate is spaced apart from the lighting channel and forms a detection passage; the small-diameter opening, the large-diameter opening, and the fourth lighting plate are distributed sequentially.
2. The lighting device of claim 1, wherein the patterned transparent detection object is a patterned transparent sheet. The first and second lighting plates form an angle of 30-90°.
3. A detection device for detecting a patterned transparent test object, characterized in that include: Image acquisition device and lighting device; The lighting device is the lighting device for patterned transparent detection objects as described in claim 1 or 2; The image acquisition device is located at the small-diameter opening.
4. The apparatus according to claim 3, wherein Also includes: Image acquisition moving component; The output end of the image acquisition moving component is connected to the image acquisition device and is used to drive the image acquisition device to move, so that the lens of the image acquisition device moves through the small aperture.
5. The apparatus according to claim 4, wherein The image acquisition motion component includes: an image driving track, an image driving slider, and an image motion driver; The image driving track is mounted on the detection base; the image acquisition device is mounted on the image driving slider; the image driving slider is movably mounted on the image driving track; the output end of the image motion driver is connected to the image driving slider and is used to drive the image driving slider to move along the length direction of the image driving track.
6. The apparatus according to claim 3, wherein Also includes: Feeding device; The conveying end of the feeding device moves through the detection passage.
7. The apparatus according to claim 4, wherein Also includes: Feeding device and position sensing device; The conveying end of the feeding device moves through the detection passage; The position sensing device is communicatively connected to the image acquisition moving component; the image acquisition moving component drives the image acquisition device to move repositionably.
8. The apparatus according to claim 7, wherein The image acquisition device moves synchronously with the conveying end of the feeding device when it moves in one of the directions of movement.
9. The apparatus according to any one of claims 3 to 8, wherein Also includes: Image recognition device; The image recognition device is communicatively connected to the image acquisition device.