CN115400959A - Machine vision specific plastic part defect detecting and sorting system with overturning function - Google Patents
Machine vision specific plastic part defect detecting and sorting system with overturning function Download PDFInfo
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- CN115400959A CN115400959A CN202211027334.9A CN202211027334A CN115400959A CN 115400959 A CN115400959 A CN 115400959A CN 202211027334 A CN202211027334 A CN 202211027334A CN 115400959 A CN115400959 A CN 115400959A
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- 229920003023 plastic Polymers 0.000 title claims abstract description 80
- 239000004033 plastic Substances 0.000 title claims abstract description 80
- 230000007547 defect Effects 0.000 title claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 238000005286 illumination Methods 0.000 claims abstract description 24
- 230000002950 deficient Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 5
- 230000009466 transformation Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 7
- 230000006872 improvement Effects 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013145 classification model Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
- B07C5/361—Processing or control devices therefor, e.g. escort memory
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- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention is suitable for the technical field of plastic piece sorting, and provides a machine vision specific plastic piece defect detecting and sorting system with a turning function, which comprises specific plastic pieces and a conveyor belt module; an illumination photographing module; the clamping and overturning device is electrically connected with the lighting and photographing module; the image acquisition module is electrically connected with the illumination photographing module; the PC is electrically connected with the image acquisition module; the sorting module is electrically connected with the PC. The invention solves the problems of high labor cost, low sorting efficiency, poor detection quality and the like in the existing manual sorting detection. The invention realizes the defect detection of the surfaces of the specific plastic piece except the bottom, so that the defect detection of the specific plastic piece is more comprehensive and the defect detection quality is higher. The surface defect detection of the specific plastic part is effectively realized. Simple structure, convenient operation and lower cost.
Description
Technical Field
The invention belongs to the technical field of plastic piece sorting detection, and particularly relates to a machine vision specific plastic piece defect detecting and sorting system with a turning function.
Background
The take-out boxes applied to the market at present are various in types, and plastic take-out boxes serving as representatives of non-standard plastic parts are better suitable for various foods by virtue of the outstanding sealing and oil resistance performance, so that the plastic is stand-alone among various materials. The plastic takeout boxes are various in types, the sorting detection of the plastic takeout boxes mainly depends on manpower, but the problems of high labor cost, low sorting efficiency, poor detection quality and the like exist in manual sorting detection. In addition, at present, in domestic colleges and universities and scientific research institutions, more researches are carried out on classifying different plastic materials through near-infrared hyperspectral image matching so as to establish a classification model to realize classification, but more researches are still in a theoretical angle, and practice is lacked. Therefore, the research on the automatic plastic part sorting and detecting system has important practical significance.
Disclosure of Invention
The invention provides a machine vision specific plastic part defect detecting and sorting system with a turning function, and aims to solve the problems in the background technology.
The invention is realized in this way, the machine vision special plastic piece defect detecting and sorting system with the turnover function comprises special plastic pieces, and also comprises:
a conveyor belt module for conveying the particular plastic part;
the illumination photographing module acquires a surface image of the specific plastic part;
the clamping and overturning device is electrically connected with the illumination photographing module and is used for matching with the illumination photographing module to clamp and overturn the specific plastic piece to change the surface position of the specific plastic piece, so that the illumination photographing module acquires a surface image of the specific plastic piece;
the image acquisition module is electrically connected with the illumination photographing module and is used for converting an image analog signal photographed by the illumination photographing module into a digital signal convenient to process;
the PC is electrically connected with the image acquisition module and is used for processing and detecting the defect of the surface image of the specific plastic part acquired by the illumination photographing module according to the digital signal transmitted by the image acquisition module;
and the sorting module is electrically connected with the PC and is used for sorting the specific plastic pieces with defects according to the detection result transmitted by the PC.
Preferably, the conveyor belt module adopts a CCD camera for shooting, and adopts an annular LED lamp as an illumination light source.
Preferably, the clamping and overturning device comprises a bearing module, an overturning module arranged on the bearing module, and a clamping module arranged on the overturning module.
Preferably, the turnover module has the functions of respectively turning 90 degrees to the front side, 90 degrees to the rear side, 90 degrees to the left side and 90 degrees to the right side.
Preferably, the clamping and overturning device is correspondingly arranged on the conveyor belt module, and the number of the clamping and overturning devices is consistent with that of the specific plastic pieces.
Preferably, the PC comprises an image enhancement module, an image denoising module, a standard qualified library module and a defect detection module.
Preferably, the image enhancement module modifies the gray value of the image through linear operation to perform gray level transformation.
Preferably, the image denoising module processes and denoises the image by a weighted mean.
Preferably, the defect detection module compares the standard qualified defect-free image in the standard qualified library module with the image to be detected obtained after the image denoising module, detects a defect, and marks the defective image if the defective image is found.
Preferably, the sorting module is a sorting mechanical arm.
Compared with the prior art, the invention has the beneficial effects that: the invention relates to a machine vision specific plastic part defect detecting and sorting system with a turning function,
1. the invention solves the problems of high labor cost, low sorting efficiency, poor detection quality and the like in the existing manual sorting detection.
2. According to the invention, the special plastic piece can be rotated through the clamping and overturning device, so that the defect detection of the other surfaces of the special plastic piece except the bottom can be realized, the defect detection of the special plastic piece is more comprehensive, and the defect detection quality is higher.
3. The invention effectively realizes the detection of the surface defects of the specific plastic part by a machine vision technology and an image detection technology.
4. The invention adopts integrated and modularized design, so that the structure is simple, the operation is convenient, and the cost is lower.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a block diagram of the clamping and flipping apparatus of the present invention;
FIG. 3 is a block diagram of a PC according to the present invention.
In the figure:
1. a specific plastic part;
2. a conveyor belt module;
3. an illumination photographing module;
4. a clamping and overturning device; 41. a carrier module; 42. a turning module; 43. a clamping module;
5. an image acquisition module;
6. a PC machine; 61. an image enhancement module; 62. an image denoising module; 63. a standard qualified library module; 64. a defect detection module;
7. and a sorting module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-3, the present invention provides a technical solution: the machine vision specific plastic part defect detecting and sorting system with the overturning function comprises specific plastic parts 1, a conveyor belt module 2, a lighting photographing module 3, a clamping and overturning device 4, an image acquisition module 5, a PC (personal computer) 6 and a sorting module 7.
The specific plastic part 1 is provided with a plurality of plastic parts, the conveyor belt module 2 is used for conveying the specific plastic part 1, and the start, stop and speed parameters of the conveyor belt module 2 can be set on the PC 6 in an operating mode. The module 3 of shooing throws light on is used for gathering the surface image of specific working of plastics 1, centre gripping turning device 4 with the module 3 electric connection of shooing throws light on is used for the cooperation the module 3 centre gripping of shooing throws light on overturns specific working of plastics 1 changes the surface position of specific working of plastics 1 makes the module 3 of shooing throws light on gathers the surface image of specific working of plastics 1. The image acquisition module 5 is electrically connected with the illumination photographing module 3 and is used for converting the image analog signals shot by the illumination photographing module 3 into digital signals convenient to process. The PC 6 is electrically connected with the image acquisition module 5 and is used for processing and detecting the surface image of the specific plastic part 1 acquired by the illumination photographing module 3 according to the digital signal transmitted by the image acquisition module 5. The sorting module 7 is electrically connected with the PC 6 and is used for sorting the specific plastic pieces 1 with defects according to the detection result transmitted by the PC 6.
As a further improvement of this embodiment, specifically, the illumination photographing module 3 adopts a CCD camera to photograph, and adopts an annular LED lamp as an illumination light source.
As a further improvement of this embodiment, the clamping and flipping device 4 includes a carrying module 41, a flipping module 42 disposed on the carrying module 41, and a clamping module 43 disposed on the flipping module 42. The clamping module 43 can clamp the bottom of the specific plastic part 1, and the turning module 42 can drive the clamping module 43 clamped with the specific plastic part 1 to turn around the bearing module 41, so that the surfaces of the specific plastic part 1 except the bottom face sequentially face upwards, and the lighting and photographing module 3 can photograph the specific plastic part.
More specifically, the carrying modules 41 in the clamping and turning device 4 are correspondingly arranged on the conveyor belt module 2, and the clamping and turning device 4 is provided with a plurality of modules which are consistent with the specific plastic parts 1 in number.
More specifically, the flipping module 42 has functions of flipping 90 ° forward, 90 ° backward, 90 ° left, and 90 ° right, respectively.
More specifically, the bearing module 41 may be a bearing seat or a bearing plate, and may be fixedly mounted on the conveyor belt module 2 by bolts or screws; the overturning module 42 is specifically a mounting plate with the bottom installed on the bearing module 41 in a spherical hinge connection mode, and overturning cylinders correspondingly connected to the periphery of the bottom of the mounting plate, wherein during overturning, pulling-down and jacking are simultaneously performed through two overturning cylinders on the same side, so that the mounting plate overturns by taking a spherical hinge joint as a rotation center. The clamping module 43 may be a clamping plate with a clamping cylinder.
As a further improvement of this embodiment, the PC 6 includes an image enhancement module 61, an image denoising module 62, a standard qualification library module 63, and a defect detection module 64. The standard qualified library module 63 contains standard and defect-free images of the specific plastic part 1, and whether the acquired images are defective or not can be detected by comparing the acquired images with the standard images in the standard qualified library module 63.
Specifically, the image enhancement module 61 modifies the gray level value of the image through linear operation to perform gray level transformation. And then, carrying out gray processing on the image according to the gray value of the specific plastic part 1 to be detected and the gray value of the surrounding background, and judging whether pixel points in the image belong to the specific plastic part 1 to be detected or not by setting a threshold.
Specifically, the image denoising module 62 processes and denoises the image through the weighted average value. Setting a window, namely a square or rectangular window, for template pixels on an image, wherein the window comprises pixels adjacent to a target pixel, replacing an original pixel value by calculating the average value of all pixels in the window row by row or column by taking the target pixel as the center, keeping the shape and the size of the window, and replacing each pixel in the original image as a central pixel one by one with the average value.
Specifically, the defect detection module 64 compares the standard qualified defect-free image in the standard qualified library module 63 with the image to be detected obtained after passing through the image denoising module 62 to detect a defect, and marks the image if a defect is found.
As a further improvement of this embodiment, the sorting module 7 is specifically a sorting mechanical arm, and the sorting mechanical arm is controlled by signals of the PC 6, and can perform a sorting operation process of the sorting module 7 on the PC 6.
The working principle and the using process of the invention are as follows:
when the device is used, a specific plastic part 1 to be detected is placed on a clamping module 43 in a clamping and overturning device 4, the bottom of the specific plastic part 1 is clamped by the clamping module 43, the specific plastic part 1 is fixed, then, the conveying speed of a conveyor belt module 2 is set on a PC, the conveyor belt module 2 is started, after the clamping and overturning device 4 with the specific plastic part 1 is conveyed to a lighting and photographing module 3 station, the conveyor belt module 2 is suspended, the lighting and photographing module 3 is matched with the clamping and overturning device 4 to overturn, the rest surfaces of the specific plastic part 1 except the bottom surface are photographed, after the lighting and photographing module 3 finishes photographing, an obtained image analog voltage signal is transmitted to an image acquisition module 5, the image acquisition module 5 converts the image signal into a digital signal, then the digital signal corresponding to the specific plastic part 1 to be detected is transmitted to a PC 6, after the PC 6 performs image enhancement and image denoising on the received digital signal, a defect detection module 64 compares the processed image with a standard qualified image in a standard qualified library module 63, if a defective image is found, the defective image is marked, then the PC 6 sends the marked image information and a sorting control command corresponding to the defective sorting module 7, and the defective plastic part sorting module 7 is released according to the sorting command.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Machine vision specific plastic part defect detecting and sorting system with overturning function comprises specific plastic parts (1), and is characterized in that: further comprising:
a conveyor belt module (2), said conveyor belt module (2) being adapted to convey said specific plastic part (1);
the lighting photographing module (3), the lighting photographing module (3) is used for collecting the surface image of the specific plastic part (1);
the clamping and overturning device (4) is electrically connected with the illumination photographing module (3) and is used for matching with the illumination photographing module (3) to clamp and overturn the specific plastic part (1) to change the surface position of the specific plastic part (1), so that the illumination photographing module (3) collects the surface image of the specific plastic part (1);
the image acquisition module (5) is electrically connected with the illumination photographing module (3) and is used for converting an image analog signal shot by the illumination photographing module (3) into a digital signal convenient for processing;
the PC (6) is electrically connected with the image acquisition module (5) and is used for processing and detecting the defects of the surface image of the specific plastic part (1) acquired by the illumination photographing module (3) according to the digital signal transmitted by the image acquisition module (5);
the sorting module (7) is electrically connected with the PC (6) and is used for sorting the specific plastic parts (1) with defects according to the detection result transmitted by the PC (6).
2. The machine vision specific plastic part defect inspection and sorting system with flipping capability of claim 1, further comprising: the illumination photographing module (3) adopts a CCD camera to photograph and adopts an annular LED lamp as an illumination light source.
3. The machine vision specific plastic part defect inspection and sorting system with flipping capability of claim 1, further comprising: the clamping and overturning device (4) comprises a bearing module (41), an overturning module (42) arranged on the bearing module (41), and a clamping module (43) arranged on the overturning module (42).
4. The machine-vision, specific plastic part defect detecting and sorting system of claim 3, wherein: the overturning module (42) has the functions of overturning by 90 degrees to the front side, overturning by 90 degrees to the rear side, overturning by 90 degrees to the left side and overturning by 90 degrees to the right side respectively.
5. The machine-vision, specific plastic part defect detecting and sorting system of claim 3, wherein: the clamping and overturning device (4) is correspondingly arranged on the conveyor belt module (2), and the clamping and overturning device (4) is provided with a plurality of plastic parts which are consistent with the specific plastic parts (1).
6. The machine vision specific plastic part defect inspection and sorting system with flipping capability of claim 1, further comprising: the PC (6) comprises an image enhancement module (61), an image denoising module (62), a standard qualified library module (63) and a defect detection module (64).
7. The machine vision specific plastic part defect inspection and sorting system with flipping function of claim 6 further comprising: the image enhancement module (61) modifies the gray value of the image through linear operation to carry out gray level transformation.
8. The machine vision specific plastic part defect inspection and sorting system with flipping function of claim 6 further comprising: the image denoising module (62) processes and denoises the image through the weighted mean value.
9. The machine vision specific plastic part defect inspection and sorting system with flipping function of claim 6 further comprising: and the defect detection module (64) compares the standard qualified defect-free image in the standard qualified library module (63) with the image to be detected obtained after the image denoising module (62) to detect defects, and marks the defective image if the defective image is found.
10. The machine vision specific plastic part defect inspection and sorting system with flipping capability of claim 1, further comprising: the sorting module (7) is specifically a sorting mechanical arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211027334.9A CN115400959A (en) | 2022-08-25 | 2022-08-25 | Machine vision specific plastic part defect detecting and sorting system with overturning function |
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| CN202211027334.9A CN115400959A (en) | 2022-08-25 | 2022-08-25 | Machine vision specific plastic part defect detecting and sorting system with overturning function |
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| CN115400959A true CN115400959A (en) | 2022-11-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117928432A (en) * | 2024-03-25 | 2024-04-26 | 四川梦腾科技有限公司 | Equipment monitoring system based on big data analysis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117928432A (en) * | 2024-03-25 | 2024-04-26 | 四川梦腾科技有限公司 | Equipment monitoring system based on big data analysis |
| CN117928432B (en) * | 2024-03-25 | 2024-05-24 | 四川梦腾科技有限公司 | Equipment monitoring system based on big data analysis |
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