CN115420746A - Quality detection method, quality detection device and quality detection equipment for printed parts - Google Patents
Quality detection method, quality detection device and quality detection equipment for printed parts Download PDFInfo
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- CN115420746A CN115420746A CN202211061115.2A CN202211061115A CN115420746A CN 115420746 A CN115420746 A CN 115420746A CN 202211061115 A CN202211061115 A CN 202211061115A CN 115420746 A CN115420746 A CN 115420746A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
- G06V30/19—Recognition using electronic means
- G06V30/19007—Matching; Proximity measures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8901—Optical details; Scanning details
- G01N2021/8905—Directional selective optics, e.g. slits, spatial filters
- G01N2021/8907—Cylindrical optics
Abstract
The invention discloses a quality detection method of a printed part, which comprises the following steps: setting a standard template of the printed piece to be detected, and uploading the standard template to a detection system; setting detection parameters; acquiring a digital image of a to-be-detected printed piece, and uploading the digital image to a detection system; the detection system compares the standard template with the digital image of the printed part to be detected according to the set detection parameters to screen out a difference part and form a detection result; the quality of the printed part is detected by the quality detector through the steps, so that the detection process is more standard and convenient, the standardization of defective product detection is realized, and the technical problems that the product quality cannot be found timely in traditional manual detection, the interference caused by subjective factors is easy to cause, and the quality evaluation of the detection result does not have stability are solved.
Description
Technical Field
The invention relates to the technical field of quality detection of printed parts and stamped parts, in particular to a quality detection method, a quality detection device and quality detection equipment of the printed parts.
Background
Printing is a technique of transferring ink to the surface of paper, textiles, plastics, leather, PVC, PC, or other materials by plate making, inking, and pressing original documents such as characters, pictures, photographs, and forgery prevention, and copying the contents of the original documents in bulk.
Further, the stamping part is made by die stamping, and in the stamping process, if the die is damaged, the mechanical structure changes to damage the stamped product, so that defective products are generated, specifically, defective products such as corner missing, polygonal and missing stamping generated in the stamping process.
Therefore, in the process of generating a large batch of printed or stamped parts, once a fault occurs in a certain step, such as a printing error, or a corner cut, a polygon, a missing punch and the like are generated during stamping, a whole batch of printed materials may be scrapped, and if the fault is not processed in time, a semi-finished product of a printed product may be clamped in a printing device, so that the production progress has to be stopped and overhauled, which greatly affects the production process.
At present, the quality detection method of the traditional printed matter mainly monitors the printed matter according to subjective evaluation through naked eye observation by mature printing technicians. The detection process of the printed piece is complicated, a standardized operation flow is lacked, the interference of subjective factors of a detector is easy to occur, the detection result precision is low, the detection quality evaluation is not stable, and the detection efficiency is low, so that the technical problems that the detection process is more standard and convenient, the detection quality is more stable, and the detection precision and the detection efficiency are higher are urgently needed in the market.
Disclosure of Invention
In order to solve the technical problems that the detection process of the traditional printed piece is relatively complicated, a standardized operation flow is lacked, and the detection result is low in precision, the detection quality evaluation is not stable, and the detection efficiency is low due to the fact that the detection process is easily interfered by subjective factors of a detector, the quality detection method, the detection device and the detection equipment for the printed piece are more standard and convenient in detection process, more stable in detection quality, and higher in detection precision and efficiency.
Specifically, the technical scheme adopted by the invention for solving the technical problem is that the quality detection method of the printing member comprises the following steps:
setting a standard template of the printed piece to be detected, and uploading the standard template to a detection system;
setting detection parameters;
acquiring a digital image of a to-be-detected printed piece, and uploading the digital image to a detection system;
the detection system matches the digital image of the detected printed piece with the standard template according to the set detection parameters to screen out a difference part and form a detection result;
and outputting a detection result.
Further, the step of setting a 'standard template' of the printed member to be detected and uploading the standard template to the detection system comprises the following steps:
manually observing and selecting a correct printing piece;
acquiring a "digital image" of the selected print by an industrial camera;
and uploading the acquired digital image to a detection system to be used as a standard template.
Further, the detecting parameters include:
the minimum area is used for controlling the minimum pixel area of the detected unit;
the maximum area is used for controlling the detection or controlling and comparing the maximum pixel area of the detected unit;
the roundness-like degree is used for controlling detection or controlling and comparing the similarity between the shape of the detected unit and the shape of the right circle;
and the color shade range is used for controlling the detection or controlling and comparing the gray value range of the detected unit.
Further, the step of obtaining a "digital image" of the printed article to be inspected and uploading the digital image to the inspection system comprises:
acquiring a "digital image" of the inspected printed piece by means of an industrial camera;
and uploading the digital image to a detection system for comparison with a standard template.
Further, the detection system compares the digital image of the detected printed piece with the standard template according to the set detection parameters to screen out a difference part and form a detection result, and the detection method comprises the following steps:
calculating the graph edge of the digital image of the standard template to obtain the graph outline of the standard template;
calculating the figure edge of the digital image of the piece to be printed so as to obtain the figure outline of the digital image of the piece to be printed;
according to the set detection parameters, matching the graph outline of the 'detected printing piece' with the graph outline of the 'standard template';
when the figure outline of the ' detected printing piece ' is different from the figure outline of the standard template ', calculating the ' pixel number, length, width, roundness-like degree, and coordinate positions of an X axis and a Y axis in an image ' of the different part to form a detection result.
Further, the step of outputting the detection result includes:
the detected units meeting the detection standard are marked with green and output on a display screen;
and marking the detected units which do not meet the detection standard in red, and outputting the red marks on a display screen.
The invention further provides a quality detection device of the printing member, which is applied to the quality detection method of the printing member, and comprises an image acquisition module, a detection module and a display module, wherein the image acquisition module is connected to the detection module and used for acquiring the digital image of the printing member so as to transmit the digital image to the detection module, the detection module is connected to an output module and used for calculating and matching the digital image of the detected printing member and the standard template according to the set detection parameters so as to form a detection result and transmitting the detection result to the display module, and the display module is used for displaying the detection result so as to realize a man-machine interaction function.
Further, the image acquisition module comprises a scanning unit and a conversion unit, the scanning unit is used for acquiring 'image information' of the printed matter, the conversion unit is used for converting 'image information' acquired by the scanning unit into 'digital image', the detection module comprises an operation unit and a matching unit, the operation unit is used for calculating the edge of the graph to acquire the outline of the graph, and the matching unit is used for matching 'the outline of the graph of the printed matter to be detected' with 'the outline of the graph of a standard template' to find out the difference part.
The invention further provides a quality detection device for a printed member, which comprises an operation platform and the quality detection device for the printed member as claimed in the claim, wherein the image acquisition module comprises a linear array camera, the linear array camera is used for scanning the printed member in a linear array manner to generate a digital image, the operation platform is provided with a detection platform for placing the printed member and a support mechanism, the linear array camera is arranged on the support mechanism, the camera is arranged towards the operation platform, the detection platform can move relative to the operation platform to realize the scanning of the printing member in the linear array manner by the camera, and the detection device is used for generating a detection result.
Further, the operating platform is further provided with a sliding mechanism and a transmission mechanism 8, the detection platform is provided with a third sliding groove and a third sliding unit, the sliding mechanism is provided with a fourth sliding groove and a fourth sliding unit, the third sliding unit and the fourth sliding unit are respectively connected to the fourth sliding groove and the third sliding groove in a sliding manner so as to realize the sliding connection between the detection platform and the operating platform, and the transmission mechanism 8 is connected to the detection platform and is used for applying an acting force to the detection platform, wherein the acting force slides back and forth on the operating platform;
the detection platform further comprises a sliding plate, the sliding plate is arranged below the detection platform, the sliding mechanism further comprises a sliding groove unit, the sliding groove unit penetrates through the operation platform, the sliding groove unit is parallel to the fourth sliding groove, when the detection platform is connected to the operation platform in a sliding mode and is opposite to the operation platform, the sliding plate penetrates into the sliding groove unit and is opposite to the sliding groove unit when the operation platform slides.
Has the advantages that: the invention sets the standard template of the printed part, sets the detection parameters, scans the digital image of the printed part to be detected by the industrial camera, uploads the digital image to the detection system, and the detection system compares the received digital image with the standard template according to the set detection parameters to form a detection result and finally outputs the detection result. According to the method, a detector can preset a standard template for comparison with a subsequent to-be-detected product, the standard template is uploaded to a detection system in a digital image mode, corresponding detection parameters are set again to control detection content, detection range, detection precision and the like, the detector can upload the digital image of the to-be-detected product such as a printed part or a stamped part to the detection system during detection, the detection system can match or compare and analyze the digital image of the to-be-detected printed part and the standard template according to the set detection parameters to find out a difference part, namely a bad part, and the difference part is output to an external device such as a display screen to allow the detector to visually find out the bad part.
Further, the invention also comprises a quality detection device of the printed piece, the device is provided with an operation platform and a quality detection device of the printed piece, specifically, the image acquisition module is a linear array camera, the linear array camera is used for scanning the printed piece by the linear array to generate a digital image, the operation platform is also provided with a detection platform and a support mechanism for placing the printed piece, the linear array camera is arranged on the support mechanism, the camera is arranged towards the operation platform, the detection platform can move relative to the operation platform to realize the scanning of the printed piece by the camera, the detection device is used for generating a detection result, the printed piece can be placed on the detection platform during detection, the device is started to move the detection platform relative to the operation platform, the moving detection platform passes through the lower part of the camera to enable the camera to continuously scan the printed piece line by line to form the digital image, the digital image is transmitted to the detection module to be compared with the standard module to form a detection result, and finally the detection result is output to a display screen, and a detector can preset a standard template to realize the batch detection of the printed piece accurately, efficiently and stably. In conclusion, compared with the traditional manual detection, the method has the beneficial effects of more standard and convenient detection process, more stable detection quality and higher detection precision and efficiency.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings may be obtained according to the drawings without creative efforts.
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 shows a schematic flow diagram of a method for quality testing of a printed item;
FIG. 2 shows a flow diagram of a method of setting a "standard template";
FIG. 3 shows a schematic flow diagram for uploading a "digital image" of a printed part under inspection to an inspection system;
FIG. 4 is a schematic flow chart showing the inspection system comparing the "standard template" with the "digital image" of the inspected printed material to screen out the difference and form the inspection result;
FIG. 5 shows a schematic construction of a device for quality control of a printed item;
figure 6 shows a schematic perspective view of a quality detection device for a print;
FIG. 7 shows a schematic view of a top perspective of the work platform;
FIG. 8 shows an exploded schematic view of the support mechanism;
FIG. 9 shows a partial enlarged schematic view at A;
FIG. 10 shows a schematic bottom view of the operator platform;
FIG. 11 shows an exploded view of the manipulation platform, detection platform, and transmission mechanism;
FIG. 12 shows a partial enlarged schematic view at B;
FIG. 13 shows a partial enlarged schematic view at C;
FIG. 14 shows a schematic connection of the transmission;
FIG. 15 shows a cross-sectional schematic view of the operation platform, the detection platform and the transmission mechanism assembly;
FIG. 16 shows a partial enlarged schematic view at D;
FIG. 17 shows a schematic view of the "visual angle" range of the camera;
fig. 18 shows another schematic view of the "visual angle" range of the camera.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or components must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
The first embodiment is as follows:
in this embodiment, fig. 1 shows a schematic flow chart of a quality detection method of a printed material, fig. 2 shows a schematic flow chart of a method for setting a "standard template", fig. 3 shows a schematic flow chart of uploading a "digital image" of a detected printed material to a detection system, and fig. 4 shows a schematic flow chart of comparing the "standard template" with the "digital image" of the detected printed material by the detection system to screen out a difference portion and form a detection result.
The present embodiment discloses a method for detecting quality of a printed product, and it should be noted that a "printed product" in the present embodiment is a product with the same appearance and size, which is repeatedly produced by a printed product or a stamped product in a production process, and the method for detecting quality of a printed product of the present embodiment mainly includes the following steps:
s11: setting a standard template of the printed piece to be detected, and uploading the standard template to a detection system;
s12: setting detection parameters;
s13: acquiring a digital image of a to-be-detected printed piece, and uploading the digital image to a detection system;
s14: the detection system compares the digital image of the detected printed piece with the standard template according to the set detection parameters to form a detection result;
s15: and outputting a detection result.
The method comprises the following steps that a detector can preset a standard template for comparison with a subsequent to-be-detected product, the standard template is uploaded to a detection system in a digital image mode, corresponding detection parameters are set again to control detection content, detection range, detection precision and the like, the detector can upload the digital image of the to-be-detected product such as a printed part or a stamped part to the detection system during detection, the detection system can match or compare and analyze the digital image of the to-be-detected printed part with the standard template according to the set detection parameters to find out a difference part, namely a bad part, and the difference part is output to an external device such as a display screen to enable the detector to visually find out the bad part.
Specifically, the step of setting the "standard template" of the to-be-printed member in the present embodiment includes:
s111: manually observing and selecting a correct printing piece;
s112: acquiring a "digital image" of the selected print by an industrial camera;
s113: uploading the digital image to a display screen, and displaying the digital image on the display screen for a detector to observe and judge;
s114: visually observing the condition that the 'digital image' shown on the display screen meets the standard template, such as whether the observed edge is clear, whether pixel points are missing and the like, if the 'digital image' does not meet the standard, entering the following steps: s111, reselecting a printing part, and if the printing part meets the standard, entering the step S113;
s115: and uploading the acquired digital image to a detection system to be used as a standard template.
It should be noted that all the imaged edges are clear and can be used as a "standard template".
Further, in this embodiment, the measuring parameters include:
the minimum area is used for controlling the detection or controlling and comparing the minimum pixel area of the detected unit;
the maximum area is used for controlling the detection or controlling and comparing the maximum pixel area of the detected unit;
the roundness-like degree is used for controlling detection or controlling and comparing the similarity between the shape of the detected unit and the shape of the right circle;
and the color shade range is used for controlling the detection or controlling and comparing the gray value range of the detected unit.
Specifically, the parameters: the minimum area is used for controlling detection or controlling comparison of the minimum pixel area of the detected unit, and the parameters are as follows: the 'maximum area' is used for controlling detection or controlling comparison of the maximum pixel area of the 'detected unit', and a detector can control the detection comparison range or precision by setting the minimum area or the maximum area, for example, when a detected graph has a gap, if the 'minimum area' is too small, the detection result will have too many gaps which are difficult to be detected by naked eyes, otherwise, if the 'maximum area' is too large, the 'gaps' which can be obviously detected by the naked eyes cannot be detected, and the detection precision is influenced, so that the detector can set a reasonable 'minimum area' value or 'maximum area' value according to the actual situation to obtain an accurate detection result. Further, the parameters: the roundness-like value is used for controlling detection or controlling and comparing the similarity between the shape of the detected unit and the shape of a perfect circle, the higher the roundness-like value of the detected pattern is, the closer the pattern is to the circle, before detection, a detector can screen out patterns with different shapes by setting the roundness-like value, and for example, the roundness-like value can be set to be smaller to screen out a pattern with a slender shape. Further parameters: the "color shade range" is used to control and detect or control and compare the gray value range of the "detected image unit", the gray value range is generally from 0 to 255, white is 255, and black is 0, and the detector can set the color shade range to "filter" whether the gray value of the detected image unit contains or does not contain the set color shade range to achieve the screening effect, and further, for the color image, the color image needs to be converted into a black-and-white image before calculation and detection.
Further, in this embodiment, the step of acquiring a "digital image" of the printed member to be detected and uploading the digital image to the detection system includes:
s131: acquiring a "digital image" of the inspected printed piece by means of an industrial camera;
s132: and uploading the digital image to a detection system for comparison with a standard template.
Further, in this embodiment, the step of comparing the "digital image" of the printed object to be detected with the "standard template" by the detection system according to the set detection parameters to form a detection result includes:
s141: calculating the graph edge of the standard template digital image to obtain the outline of the graph;
s142: calculating the figure edge of the digital image of the detected printed piece to obtain the outline of the figure;
s143: according to the set detection parameters, matching the graph outline of the 'detected printing piece' with the graph outline of the 'standard template';
s14: when the figure outline of the ' detected printed part ' is different from that of the standard template ', the difference part is displayed separately and the number of pixels, length, width, roundness-like degree of the difference part and the coordinate positions of the X axis and the Y axis in the image are calculated to form the detection result.
Through the steps, after the detection system obtains the digital image of the part of the printed matter to be detected or the digital image of the standard template, the detection system can automatically calculate the edge of the pattern to obtain the outline of the pattern, and match other printed matter to be detected according to the outline and the detection parameters, wherein the detection system can automatically correct the outline distortion of the printed matter to be detected to eliminate the misjudgment caused by the mismatching of the shooting distortion and the outline of the standard template, when the outline of the standard template is different, the difference part can be independently displayed, and the pixel number, the length, the width and the roundness-like degree of the difference part and the coordinate positions of an X axis and a Y axis in the image are calculated to form a detection result.
Further, in this embodiment, the step of outputting the detection result includes:
the detected units meeting the detection standard are marked with green and output on a display screen;
and marking the detected units which do not meet the detection standard in red, and outputting the red marks on a display screen.
Through the steps, a detector can quickly find out the defective area by observing the color mark on the display screen, and furthermore, the 'number of pixels, length, width, roundness-like degree, X-axis coordinate position and Y-axis coordinate position in the image' of the defective area are synchronously displayed on the display screen, so that the detector can know various parameters of the defective area in detail to analyze the reason of the defective area.
Example two:
as shown in fig. 5, the present embodiment provides a quality detection apparatus for a printed material, which is applied to the quality detection method for a printed material in "embodiment one", and the detection apparatus for this embodiment includes an image acquisition module, a detection module and a display module, where the image acquisition module is respectively connected to the detection module and the display module, and is configured to acquire a "digital image" of the printed material, and transmit the acquired "digital image" to the detection module and the display module, the detection module is connected to the output module, and is configured to calculate and match the "digital image of the printed material" and the "standard template" according to a set detection parameter, so as to form a detection result, and transmit the detection result to the display module, and the display module is configured to display the detection result and the "standard template" so as to implement a human-computer interaction function.
Specifically, the image acquisition module comprises a scanning unit and a conversion unit, the scanning unit is used for acquiring 'image information' of a printed piece, the conversion unit is used for converting the 'image information' acquired by the scanning unit into 'digital images', the detection module comprises an operation unit and a matching unit, the operation unit is used for calculating the edge of a graph to acquire the outline of the graph, and the matching unit is used for matching the 'acquired graph outline' with the 'graph outline of a standard template' to find out a difference part.
As a preferable mode, in this embodiment, the image acquisition module may be an industrial camera, and specifically, may be the linear array camera 4, and since the sensor of the linear array camera 4 is a line of photosensitive elements and is linear, the linear array camera 4 may include more one-dimensional pixels than an area array camera, the linear array resolution is high, and the pixel size is more flexible, and may acquire data line by line, which is particularly suitable for measuring a one-dimensional dynamic target. Therefore, the linear array camera 4 has higher precision than the area array camera, and can generally make the detection accuracy be accurate to the micron order, and the higher precision image scanning is helpful to improve the precision of the equipment for detecting the quality of the printed matter, and during the detection, the printed matter passes under the camera at a constant speed, and at the same time, the camera will continuously scan the printed matter line by line, so as to achieve the uniform detection of the whole surface of the printed matter.
Through the structure, when a standard template of a printed part to be detected is set, firstly, a correct printed part is selected in a manual observation mode, image information of the printed part is obtained through the scanning unit, the image information obtained through the scanning unit is converted into a digital image through the conversion unit, the digital image is uploaded to the display module, if the digital image is uploaded to the display screen, a detector can observe the condition that the digital image shown on the display screen meets the standard template through naked eyes, specifically, whether the edge of the image on the display screen is clear or not, whether pixel points are missing or not can be observed through observing, if the digital image shown on the display screen does not meet the condition of the standard template, a correct printed part can be re-selected through manual observation, the steps are repeated until the digital image meeting the standard template is selected, and the digital image is uploaded to the detection module to serve as the standard template.
Further, during detection, the scanning unit may obtain "image information" of the printed part to be detected, the converting unit may convert the "image information" obtained by the scanning unit into a "digital image" and upload the "digital image" to the detecting module for comparison with the "standard template", the detecting module may compare the "digital image" of the printed part to be detected with the "standard template" according to the set detection parameters to form a detection result, specifically, in the present embodiment, the computing unit may calculate a pattern edge of the "digital image of the printed part to be detected" and a pattern edge of the "standard template" to obtain a pattern profile of the "digital image of the printed part to be detected" and a pattern profile of the "standard template" according to the set detection parameters, the matching unit may obtain a difference portion by matching the pattern profile of the "standard template" and the pattern profile of the "printed part to be detected, and calculate a" pixel number, length, width, roundness class, a position "of the X axis and the Y axis of the difference portion to form a detection result, and finally output to the display module, specifically, the detecting unit may display a detailed detection result on the display a defect area of the X axis and Y axis of the defect mark on the detecting screen by displaying the coordinate position of the green mark on the detecting unit, and further displaying the defect area on the detecting screen, and displaying the defect area on the detecting screen.
Example three:
in the present embodiment, fig. 6 shows a schematic perspective view of a quality inspection apparatus for a printed material, fig. 7 shows a schematic perspective view of an operating platform from above, fig. 8 shows an exploded schematic view of a support mechanism, fig. 9 shows a schematic partial enlarged view at a, fig. 10 shows a schematic perspective view of an operating platform from below, fig. 11 shows an exploded schematic view of the operating platform, the inspection platform, and a transmission mechanism, fig. 12 shows a schematic partial enlarged view at B, fig. 13 shows a schematic partial enlarged view at C, fig. 14 shows a schematic connection diagram of the transmission mechanism, fig. 15 shows a schematic sectional view of an assembly of the operating platform, the inspection platform, and the transmission mechanism, fig. 16 shows a schematic partial enlarged view at D, fig. 17 shows a schematic view of a "visual angle" range of a camera, and fig. 18 shows another schematic view of the "visual angle" range of the camera.
In this embodiment, a quality detection apparatus for a printed matter is provided in combination with the first embodiment and the second embodiment, where the quality detection apparatus for a printed matter has an apparatus main body 1, the apparatus main body 1 includes an operation platform 11 and a detection device described in the second embodiment, in this embodiment, the image acquisition module is a linear array camera 4, the linear array camera 4 is used to scan the printed matter in a "linear array" manner to generate a "digital image", the operation platform 11 is provided with a detection platform 16 and a support mechanism 12 for placing the printed matter, the linear array camera 4 is arranged on the support mechanism 12, and the camera is arranged toward the operation platform 11, the detection platform 16 can move relative to the operation platform 11 to realize the "linear array" scanning of the printed matter by the camera, and the detection device is used to generate a detection result.
Examine time measuring, can place printing on testing platform 16, the starting equipment, make testing platform 16 remove relative operation platform 11, the testing platform 16 that removes passes through the camera below, make the camera carry out line by line continuous scanning to printing, in order to form "digital image", and transmit to detection module, detection module compares "standard module" and "the digital image that is got to the printing of examining", draw the difference part, in order to form the testing result, and export on the display screen, through the structure setting, the person of examining can set up "standard template" in advance, can be in batches, it is accurate, high-efficient, stable realization is to the quality detection of examining the printing, it is convenient to use, therefore, the clothes hanger is strong in practicability.
As a preferred embodiment, in this embodiment, the supporting mechanism 12 includes a supporting portion 121 and a sliding portion 122, the supporting portion 121 is vertically disposed on the operation platform 11, the sliding portion 122 is vertically disposed on the supporting portion 121 and can slide up and down relative to the supporting portion 121, the line camera 4 is disposed on the sliding portion 122 to slide up and down relative to the supporting portion 121 as the sliding portion 122 slides up and down, it should be noted that the camera of the line camera 4 should be disposed toward the operation platform 11, the printed member to be detected is disposed under the camera for the camera to obtain image information, when the sliding portion 122 slides down relative to the supporting portion 121, the vertical distance between the line camera 4 and the operation platform 11 gradually decreases, as the line camera 4 is continuously closed to the operation platform 11, the "visible range" of the camera on the operation platform 11 is gradually decreased, that is the effective information collection range of the camera on the operation platform 11 is accordingly, as shown in fig. 18, the printed member with a smaller applicable area is used, when the sliding portion 122 slides up relative to the supporting portion 121, the vertical distance between the line camera 4 and the operation platform 11 is gradually increased, that is larger than the effective information collection range of the printed member on the operation platform 11, as shown in the digital image acquisition module, the operation platform 17, the digital image acquisition module is gradually matched with the standard digital image acquisition module, and the detection module is set as needed, and find out the difference part to determine whether the printed material is correct, further, when the printed material with different area size is encountered, the 'visible range' of the camera on the operation platform 11 can be adjusted by moving the sliding part 122 to adapt to the printed material with different area.
Further, in this embodiment, the supporting portion 121 includes a first supporting unit 1211 and a second supporting unit 1212, a lower end of the first supporting unit 1211 is fixed to the operating platform 11, an upper end of the first supporting unit 1211 is fixedly connected to a lower end of the second supporting unit 1212, the sliding portion 122 is slidably connected to the second supporting unit 1212, the first supporting unit 1211 is used to control a minimum height of the sliding portion 122 moving downward, when in use, the sliding portion 122 can move to a bottom end of the second supporting unit 1212 at the lowest level and can move to a top end of the second supporting unit 1212 at the highest level, so as to avoid that the sliding portion 122 is too close to the operating platform 11 when moving downward, which causes the camera to collide with the operating platform 11 and causes damage.
Further, the first support unit 1211 further includes a left support unit 1213 and a right support unit 1214, the left support unit 1213 and the right support unit 1214 are fixed on the operation platform 11 side by side, a reinforcing plate 1215 is disposed between the left support unit 1213 and the right support unit 1214 to stabilize the first support unit 1211, a connecting plate 1216 is fixedly disposed at upper ends of the left support unit 1213 and the right support unit 1214, and the second support unit 1212 is fixed on the connecting plate 1216.
Further, the second support unit 1212 is provided with a first slide rail 21 at a front end thereof, one end of the sliding portion 122 is provided with a second slide rail 22, the other end of the sliding portion 122 is provided with the linear array camera 4, the first slide rail 21 and the second slide rail 22 are slidably connected to realize the sliding connection between the sliding portion 122 and the second support unit 1212, specifically, the first slide rail 21 includes a first slide groove 211 and a first slide unit 212, the second slide rail 22 includes a second slide groove 221 and a second slide unit 222, the first slide unit 212 and the second slide unit 222 are respectively slidably arranged in the second slide groove 221 and the first slide groove 211 to realize the sliding connection between the first slide rail 21 and the second slide rail 22, in this embodiment, the sliding portion 122 is "suspended" on the second support unit 1212 "by a friction force between the first slide rail 21 and the second slide rail 22, when the height of the camera needs to be adjusted, the sliding portion 122 can be manually moved to overcome the friction force between the first slide rail 21 and the second slide rail 22, so as to realize the sliding portion 122 is skillfully designed with respect to the second support unit 1212, and the camera can be moved up and down.
Further, the second supporting unit 1212 is provided with a face cover 1217 on the front end face, a first accommodating space is formed between the face cover 1217 and the front end face of the second supporting unit 1212, when the sliding portion 122 is connected to the second supporting unit 1212, the first slide rail 21 and the second slide rail 22 are both disposed in the first accommodating space, so as to protect the first slide rail 21 and the second slide rail 22, further, the second supporting unit 1212 is further provided with a supporting plate 1218 on the rear end face, and the supporting plate 1218 is triangular so as to stabilize the second supporting unit 1212.
Further, as a preferred mode of this embodiment, the operating platform 11 is provided with the lighting device 3 below the sliding portion 122, when detecting a printed product, the lighting device 3 can be opened to supplement light, so as to be suitable for an environment with poor illumination, further, the device main body 1 has a second accommodating space below the operating platform 11, the second accommodating space can be used for storing a host computer or other sundries, specifically, the second accommodating space includes a cabinet door 13 and a tray 14, the cabinet door 13 is used for closing the second accommodating space, the tray 14 is disposed below the operating platform 11 and can slide back and forth relative to the operating platform 11, the tray 14 can be used for storing "IO devices" of a computer, such as a keyboard, a mouse, and the like, and the display screen can be disposed on the operating platform 11, so as to facilitate human-computer interaction, and the use is convenient.
Further, in this embodiment, the operation platform 11 further includes a detection platform 16, a sliding mechanism 17 and a transmission mechanism 18, the detection platform 16 is used for placing a printing member to be detected, and can slide back and forth on the operation platform 11 through the sliding mechanism 17, the transmission mechanism 18 is used for applying a power to the detection platform 16 to slide back and forth on the operation platform 11, when the detection platform 16 moves back and forth relative to the operation platform 11 from left to right and from right to left once, the linear camera 4 scans the right end of the printing member to the left end of the printing member, and then scans back to the right end of the printing member from the left end of the printing member to obtain a "digital image" of the printing member.
Further, in this embodiment, the detecting platform 16 includes a third slide rail 23, the sliding mechanism 17 includes a fourth slide rail 24, the third slide rail 23 is connected to the fourth slide rail 24 in a sliding manner, so as to realize the sliding connection between the detecting platform 16 and the operating platform 11, further, the detecting platform 16 further includes a sliding plate 161, the sliding plate 161 is disposed below the top panel of the detecting platform 16, the sliding mechanism 17 further includes a sliding groove unit 171 penetrating through the operating platform 11, the sliding groove unit 171 is disposed in parallel to the fourth slide rail 24, when the third slide rail 23 is connected to the fourth slide rail 24 and slides relative to the fourth slide rail 24, the sliding plate 161 penetrates into the sliding groove unit 171 and slides relative to the sliding groove unit 171, and the structure is simple, the design is ingenious, and the production is facilitated.
Further, the third slide rail 23 includes a third slide groove 231 and a third slide unit 232, the fourth slide rail 24 includes a fourth slide groove 241 and a fourth slide unit 242, when the third slide rail 23 is connected to the fourth slide rail 24, the third slide unit 232 and the fourth slide unit 242 respectively slide in the fourth slide groove 241 and the third slide groove 231, so as to realize the sliding connection between the third slide rail 23 and the fourth slide rail 24, further, the detecting platform 16 further includes a first connecting element 162, the first connecting element 162 is disposed below the operating platform 11 and respectively fixedly connected to the transmission mechanism 18, the third slide rail 23 and the slide plate 161, the transmission mechanism 18 is configured to drive the first connecting element 162 to move back and forth below the operating platform 11 relative to the operating platform 11, the first connecting element 162 moving back and forth further drives the third slide rail 23 and the slide plate 161 to move back and forth relative to the fourth slide rail 24 and the relative to the slide groove unit 171, respectively, and the transmission mechanism 18 drives the detecting platform 16 to slide back and forth on the operating platform 11.
Further, in this embodiment, the transmission mechanism 18 includes a driving device 181, a screw rod 182 and a second connecting member 183, the driving device 181, the screw rod 182 and the second connecting member 183 are all disposed below the operating platform 11, and the screw rod 182 is disposed parallel to the third slide rail 23 and the fourth slide rail 24, the driving device 181 is configured to provide a rotating power, in this embodiment, the driving device 181 is a small-sized motor, further, the second connecting member 183 is connected to a rotating end of the driving device 181 and a rotating end of the screw rod 182, the driving device 181 rotates to drive the second connecting member 183 to rotate, the rotating second connecting member 183 drives the screw rod 182 to rotate, in this embodiment, the second connecting member 183 is a "belt", further, the screw rod is configured to convert a "steering force" into a "lateral force", specifically, fixing members are disposed at two ends of the screw rod 182, the fixing members are fixed below the operating platform, the screw rod 182 is rotatable within the operating platform, the screw rod 182 is further sleeved with a slider 1821, the slider 1821 is fixed on the first connecting member 162, and when the screw rod rotates, the slider 1821 is capable of driving the slider 1821 to move back and forth on the screw rod 182, and forth to the operating platform 18211.
Further, preferably, the apparatus main body 1 of the present embodiment may further include a speed control device, where the speed control device is configured to control a time when the detection platform 16 moves back and forth on the operation platform once, the shorter the time is, the faster the movement speed of the detection platform 16 is, the longer the time is, the slower the movement speed of the detection platform 16 is, during detection, if the movement speed is too fast, blurring, omission, and the like may easily occur in the line camera information acquisition, and if the movement speed is too slow, the printed matter detection time will be extended, therefore, a user may adjust the speed control device according to the size and actual situation of the printed matter to control the back and forth speed of the detection platform 16, and preferably, the speed control device in the present embodiment sets the time when the detection platform 16 moves back and forth to 9 seconds to better adapt to most printed matters.
Further, as a preference, the bottom of the device main body 1 in this embodiment may further be provided with a roller 15, so that when the device is moved, the roller 15 can be moved to realize convenient movement of the device, further, a clamping mechanism may be further disposed at the roller 15, the clamping mechanism is used to fix the roller 15, and when the device does not need to be moved, the roller 15 can be fixed by the clamping mechanism to realize fixation of the device.
The foregoing is illustrative of one or more embodiments provided in connection with the detailed description and is not intended to limit the invention to the specific embodiments disclosed herein. Similar or identical methods, structures and the like as those of the present invention or several technical deductions or substitutions made on the premise of the conception of the present invention should be considered as the protection scope of the present invention.
Claims (10)
1. A quality detection method of a printed member is characterized in that: the method comprises the following steps:
setting a standard template of a printed part to be detected, and uploading the standard template to a detection system;
setting detection parameters;
acquiring a digital image of a to-be-detected printed piece, and uploading the digital image to a detection system;
the detection system matches the digital image of the detected printed piece with the standard template according to the set detection parameters to screen out a difference part and form a detection result;
and outputting a detection result.
2. A method of quality inspection of a printed matter according to claim 1, characterized in that: the step of setting the standard template of the printed piece to be detected and uploading the standard template to the detection system comprises the following steps:
manually observing and selecting a correct printing piece;
acquiring a "digital image" of the selected print by an industrial camera;
and uploading the acquired digital image to a detection system to be used as a standard template.
3. A method of quality inspection of a printed matter according to claim 1, characterized by: the detection parameters include:
the minimum area is used for controlling the minimum pixel area of the detected unit;
the maximum area is used for controlling detection or controlling and comparing the maximum pixel area of the detected unit;
the roundness-like degree is used for controlling detection or controlling and comparing the similarity between the shape of the detected unit and the shape of a perfect circle;
and the color shade range is used for controlling the detection or controlling and comparing the gray value range of the detected unit.
4. A method of quality inspection of a printed matter according to claim 1, characterized by: the step of obtaining the digital image of the printed piece to be detected and uploading the digital image to a detection system comprises the following steps: acquiring a "digital image" of the inspected printed piece by means of an industrial camera;
and uploading the digital image to a detection system for comparison with a standard template.
5. A method of quality inspection of a printed matter according to claim 3, characterized by: the detection system compares the digital image of the printed piece to be detected with the standard template according to the set detection parameters to screen out a difference part and form a detection result, and the detection method comprises the following steps:
calculating the graph edge of the standard template to obtain the graph outline of the standard template;
calculating the graph edge of the digital image of the piece to be printed so as to obtain the graph outline of the digital image of the piece to be printed;
according to the set detection parameters, matching the graph outline of the 'standard template' with the graph outline of the 'detected printing part';
when the figure outline of the ' detected printing piece ' is different from the figure outline of the standard template ', calculating the ' pixel number, length, width, roundness-like degree, and coordinate positions of an X axis and a Y axis in an image ' of the different part to form a detection result.
6. A method of quality inspection of a printed matter according to claim 1, characterized by: the step of outputting the detection result includes:
the detected units meeting the detection standard are marked with green and output on a display screen;
and marking the detected units which do not meet the detection standard in red, and outputting the red marks on a display screen.
7. The quality detection device of the printing member, which is applied to the quality detection method of the printing member according to any one of claims 1 to 6, comprises an image acquisition module, a detection module and a display module, wherein the image acquisition module is connected to the detection module and used for acquiring a digital image of the printing member to be transmitted to the detection module, the detection module is connected to an output module and used for calculating and matching the digital image of the printing member to be detected and a standard template according to set detection parameters to form a detection result and transmitting the detection result to the display module, and the display module is used for displaying the detection result to realize a man-machine interaction function.
8. A quality inspection apparatus of a printed matter according to claim 7, characterized in that: the image acquisition module comprises a scanning unit and a conversion unit, wherein the scanning unit is used for acquiring 'image information' of a printed piece, the conversion unit is used for converting the 'image information' acquired by the scanning unit into 'digital images', the detection module comprises an operation unit and a matching unit, the operation unit is used for calculating the edge of a graph to acquire the outline of the graph, and the matching unit is used for matching the 'graph outline of the printed piece to be detected' with the 'graph outline of a standard template' to find out a difference part.
9. A quality inspection apparatus for a printed matter, characterized by: the quality detection device for the printed matter comprises an operation platform (11) and the quality detection device for the printed matter as claimed in claim 7, wherein the image acquisition module comprises a linear array camera (4), the linear array camera (4) is used for scanning the printed matter in a linear array manner to generate a digital image, a detection platform (16) and a support mechanism (12) for placing the printed matter are arranged on the operation platform (11), the linear array camera 4 is arranged on the support mechanism (12), the camera faces the operation platform (11), the detection platform (16) can move relative to the operation platform (11) to realize the scanning of the linear array of the printed matter by the camera, and the detection device is used for generating a detection result.
10. A quality inspection apparatus of a printed member according to claim 9, wherein: the operation platform (11) is further provided with a sliding mechanism (17) and a transmission mechanism (18), the detection platform (16) is provided with a third sliding groove (231) and a third sliding unit (232), the sliding mechanism (17) is provided with a fourth sliding groove (241) and a fourth sliding unit (242), the third sliding unit (232) and the fourth sliding unit (242) are respectively connected with the fourth sliding groove (241) and the third sliding groove (231) in a sliding manner so as to realize the sliding connection between the detection platform (16) and the operation platform (11), and the transmission mechanism (18) is connected to the detection platform (16) and is used for applying an acting force which slides back and forth on the operation platform (11) to the detection platform (16);
the detection platform (16) further comprises a sliding plate (161), the sliding plate (161) is arranged below the detection platform (16), the sliding mechanism (17) further comprises a sliding groove unit (171) which penetrates through the operation platform (11), the sliding groove unit (171) is parallel to the fourth sliding groove (241), and when the detection platform (16) is connected to the operation platform (11) in a sliding mode and is opposite to the operation platform (11) in a sliding mode, the sliding plate (161) penetrates into the sliding groove unit (171) and is opposite to the sliding groove unit (171) in a sliding mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211061115.2A CN115420746A (en) | 2022-09-01 | 2022-09-01 | Quality detection method, quality detection device and quality detection equipment for printed parts |
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| CN202211061115.2A CN115420746A (en) | 2022-09-01 | 2022-09-01 | Quality detection method, quality detection device and quality detection equipment for printed parts |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115955614A (en) * | 2022-12-14 | 2023-04-11 | 青岛创新奇智科技集团股份有限公司 | Image acquisition device and defect detection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115955614A (en) * | 2022-12-14 | 2023-04-11 | 青岛创新奇智科技集团股份有限公司 | Image acquisition device and defect detection system |
| CN115955614B (en) * | 2022-12-14 | 2024-01-26 | 青岛创新奇智科技集团股份有限公司 | Image acquisition device and defect detection system |
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