CN113251955A - Flatness measuring device and method for corrugated board production - Google Patents
Flatness measuring device and method for corrugated board production Download PDFInfo
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- CN113251955A CN113251955A CN202110426190.3A CN202110426190A CN113251955A CN 113251955 A CN113251955 A CN 113251955A CN 202110426190 A CN202110426190 A CN 202110426190A CN 113251955 A CN113251955 A CN 113251955A
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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Abstract
The invention discloses a flatness measuring device and method for corrugated board production, which mainly comprises the following steps: the system comprises a conveying module, a projection module, an acquisition module and an analysis module; the corrugated board surface flatness detection device comprises a conveying module, a projection module, an acquisition module, an analysis module and an analysis module, wherein the conveying module is used for conveying a corrugated board to be detected, the projection module is used for projecting a measurement grid to the surface of the corrugated board to be detected, the acquisition module is used for acquiring a measurement image of the measurement grid on the surface of the corrugated board to be detected and sending the measurement image to the analysis module, and the analysis module is used for extracting and analyzing each grid line in the measurement image so as to judge the flatness of the surface of the corrugated board. The flatness detection can be carried out on the surface of the whole corrugated paperboard in a highly accurate, high-efficiency and objective manner, and the rejection rate and the fault outage rate of the subsequent production links are effectively reduced.
Description
Technical Field
The invention relates to the technical field of corrugated board production detection, in particular to a flatness measuring device and method for corrugated board production.
Background
The surface smoothness of the corrugated board is an important index, and has direct influence on product printing, die cutting and slotting, and the poor surface smoothness of the corrugated board can directly cause the increase of the rejection rate and the failure outage rate of the subsequent production link. The paperboard produced by the corrugated board production line due to the relation between the humidity, the temperature, the adhesive thickness, the tension and the relative humidity and the paperboard quality is often uneven, the visual detection of quality inspection personnel is generally adopted in the prior art, and the accuracy, the objectivity and the efficiency are low; or the laser emitter and the laser receiver which are oppositely arranged on the same horizontal line are used for detecting the surface flatness of the corrugated paper, but only the flatness of the laser passing position can be detected, and the flatness of the whole corrugated paper board cannot be detected; or the flatness detection is realized by combining a video camera with an image analysis technology; however, since the arch of the corrugated paper is not prominent in the video image, the detection of the non-serious arch phenomenon cannot be effectively performed, and the detection can be performed only by comparing the serious and obvious arch.
Disclosure of Invention
Objects of the invention
In order to overcome at least one defect in the prior art, the flatness detection can be carried out on the surface of the whole corrugated paperboard in a highly accurate, high-efficiency and objective manner, and the rejection rate and the fault outage rate of the subsequent production link are effectively reduced, the invention discloses the following technical scheme.
(II) technical scheme
As a first aspect of the present invention, the present invention discloses a flatness measuring apparatus for corrugated board production, comprising: the system comprises a conveying module, a projection module, an acquisition module and an analysis module;
the conveying module is used for conveying the corrugated board to be detected;
the projection module is used for projecting a measurement grid to the surface of the corrugated board to be detected;
the acquisition module is used for acquiring a measurement image of the measurement grid on the surface of the corrugated board to be detected and sending the measurement image to the analysis module;
the analysis module is used for extracting and analyzing each grid line in the measurement image and judging the posture of the measurement grid line;
the acquisition module is in signal connection with the analysis module.
In one possible embodiment, the projection module includes a projection end unit, a first moving assembly unit, and a second moving assembly unit;
the projection end unit is used for transmitting a measurement grid;
the first moving assembly unit is used for driving the projection end unit to move along the movement direction of the conveying module;
the second moving assembly unit is used for driving the projection end unit to move along the direction vertical to the moving direction of the conveying module.
In a possible implementation manner, the first moving assembly unit includes two sets of moving units, the two sets of moving units are respectively disposed at two sides of the conveying module, the moving units include a first slide rail and a first slide block, the first slide rail is fixed at a side surface of the conveying module, and the first slide block is slidably connected to the first slide rail and slides along a moving direction of the conveying module;
the second moving assembly unit comprises a second slide rail and a second slide block, the second slide rail is fixedly connected to the first slide block through support rods fixed at two ends of the second slide rail, and the second slide block is connected to the second slide rail in a sliding manner and slides in a direction perpendicular to the moving direction of the conveying module;
in one possible embodiment, the projection end unit further comprises a rotation unit and a projection end;
the rotating unit is used for driving the projection end to rotate clockwise or anticlockwise in the direction perpendicular to the moving direction of the conveying module.
In one possible embodiment, the acquisition module comprises a shooting unit and a sending unit;
the shooting unit is used for acquiring a measurement image of the measurement grid on the surface of the corrugated board to be detected;
the sending unit is used for sending the measurement image to the analysis module.
In one possible embodiment of the method according to the invention,
the analysis module comprises a receiving unit, an extraction unit and an analysis unit;
the receiving unit is used for receiving the measurement image sent by the acquisition module;
the extraction unit is used for extracting each grid line in the measurement image;
the analysis unit is used for analyzing the flatness of each grid line.
As a second aspect of the present invention, the present invention further discloses a method for measuring a flatness measuring apparatus for corrugated board production according to any of the above technical solutions, comprising the steps of:
projecting a measurement grid to the surface of the corrugated board to be detected;
acquiring a measurement image of the measurement grid on the surface of the corrugated board to be detected;
extracting and analyzing each grid line in the measurement image;
and judging the posture of each grid line in the measurement grid.
In a possible implementation manner, the determining the pose of each grid line in the measurement grid specifically includes:
if each grid line of the measuring grid presents a straight extending and mutually parallel posture, the surface evenness of the corrugated board is good;
if the grid lines of the measurement grid have the postures of distortion, interruption and dislocation, the surface flatness of the corrugated board is poor.
In a possible embodiment, if there is distortion or a broken and misplaced posture in each grid line of the measurement grid, the surface flatness of the corrugated board is not good, and then, the method further comprises the following steps:
extracting local images of the grid line segments with distorted, interrupted and misplaced postures;
comparing the local image with a preset template to obtain a matched template;
the corrugated board is graded.
In a possible embodiment, the classifying the corrugated cardboard specifically includes:
the surface flatness of the corrugated cardboard is graded with reference to the type of the template.
In a possible embodiment, the classifying the corrugated cardboard further includes:
and distributing the corrugated boards to corresponding conveying units according to the detection grading result.
(III) advantageous effects
The invention discloses a flatness measuring device and method for corrugated board production, which have the following beneficial effects:
1. the surface of the corrugated board to be detected is projected with the measuring grid through the projection module, the acquisition module acquires a measuring image of the surface measuring grid of the corrugated board to be detected and sends the measuring image to the analysis module, and the analysis module extracts and analyzes each grid line in the measuring image and judges the posture of each grid line so as to judge the flatness of the surface of the corrugated board.
2. The first moving assembly unit and the second moving assembly unit are utilized to drive the projection end to move along the X axis and the Y axis, and therefore the corrugated boards with different sizes can be comprehensively subjected to projection measurement grids.
3. The rotating unit is adopted to drive the projection end to rotate clockwise or anticlockwise at a fixed speed, so that projection measurement grids in different directions are realized, and the arched position is convenient to detect.
4. The measurement grid lines adopt a single color which has higher brightness and larger color difference with the surface color of the corrugated board, so that the extraction and analysis of each grid line are convenient.
5. The analysis module extracts a local image of a distribution area of grid line segments with distorted, interrupted and misplaced postures, compares the local image with a preset template to obtain a matched template, and classifies the surface evenness of the corrugated board according to the type of the template to confirm whether the corrugated board is scrapped or can be applied to occasions with low evenness.
6. The analysis module is connected with a management system of the corrugated board production line, corrugated paper is distributed to corresponding conveying units according to the grading detection result, manual sorting operation is replaced, and cost is saved.
Drawings
The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining and illustrating the present invention and should not be construed as limiting the scope of the present invention.
FIG. 1 is a schematic view of a flatness measuring apparatus for corrugated board production according to the present disclosure;
FIG. 2 is a schematic view of a projection module disclosed herein;
FIG. 3 is a schematic three-dimensional structure of a flatness measuring apparatus for corrugated board production according to the present disclosure;
FIG. 4 is a schematic three-dimensional structure of a first moving assembly unit disclosed in the present invention;
FIG. 5 is a schematic three-dimensional structure of a second moving element unit according to the present disclosure;
FIG. 6 is a schematic diagram of a configuration of a projection measurement grid and acquisition measurement image as disclosed herein;
FIG. 7 is a schematic diagram of an attitude of a measurement grid with distorted grid lines and interrupted dislocation according to the present disclosure;
FIG. 8 is a schematic view of a flatness measuring method for corrugated board production according to the present invention;
fig. 9 is a schematic view of the method for treating poor surface flatness of corrugated cardboard disclosed in the present invention.
Reference numerals:
100. a delivery module;
200. a projection module; 210. a projection end unit; 211. a rotation unit; 212. a projecting end; 220. a first moving assembly unit; 221. a first slide rail; 222. a first slider; 230. a second moving assembly unit; 231. a second slide rail; 232. a second slider;
300. an acquisition module; 310. a shooting unit; 320. a transmitting unit;
400. an analysis module; 410. a receiving module; 420. an extraction module; 430. and an analysis module.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention.
It should be noted that: in the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are some embodiments of the present invention, not all embodiments, and features in embodiments and embodiments in the present application may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.
A first embodiment of a flatness measuring apparatus for corrugated board production according to the present disclosure is described in detail below with reference to fig. 1 to 7. This embodiment is mainly applied to and measures corrugated container board surface smoothness, treat to detect corrugated container board surface through the projection module and throw the measurement net, collection module acquires the measurement image who treats to detect corrugated container board surface measurement net, and send to analysis module, analysis module draws and analyzes each grid line in the measurement image, and judge the gesture of each grid line, thereby judge corrugated container board surface smoothness, can be high accurate, high efficiency, objectively carry out the roughness to whole corrugated container board surface and detect, the effectual rejection rate and the fault outage rate that reduces follow-up production link.
As shown in fig. 1 and 3, the present embodiment mainly includes: a transport module 100, a projection module 200, an acquisition module 300, and an analysis module 400.
The conveying module 100 is used for conveying the corrugated board to be detected;
the projection module 200 is used for projecting a measurement grid to the surface of the corrugated board to be detected;
the acquisition module 300 is used for acquiring a measurement image of the measurement grid on the surface of the corrugated board to be detected and sending the measurement image to the analysis module;
the analysis module 400 is configured to extract and analyze each grid line in the measurement image, and determine a posture of the measurement grid line;
the collection module 300 is in signal connection with the analysis module 400.
The conveying module 100 of the measuring device is disposed at the end of a corrugated board production line for conveying corrugated boards to be detected, and the conveying module 100 generally adopts an active conveyor (i.e., a powered conveyor), such as a belt conveyor or a chain conveyor driven by a motor, or a driven conveyor (i.e., a non-powered conveyor).
The projection module 200 is arranged above the conveying module 100, the plurality of acquisition modules 300 are arranged on the side surface of the projection module 200, and the installation positions of the acquisition modules 300 cannot interfere with the measurement grid lines projected by the projection module 200.
The projection module 200 further includes a sensor for detecting whether or not there is a corrugated cardboard under the projection module 200 and detecting the size of the corrugated cardboard.
In the detection process, a corrugated board to be detected is placed at one end of the conveying module 100, the conveying module 100 drives the corrugated board to be detected to move, when the sensor detects that a corrugated board is arranged below the projection module 200, the sensor sends a signal to be detected to the controller, the controller sends a motion stopping instruction to the conveying module 100 after receiving the signal to be detected, the conveying module 100 stops moving after receiving the motion stopping instruction, the sensor detects the size of the corrugated board and sends the detection result to the controller, the controller controls the projection module 200 to adjust the position according to the size of the corrugated board, after the position is adjusted to a proper position, the corrugated board projects a measurement grid, after the grid to be measured is projected, the acquisition module 300 acquires a measurement image and sends the measurement image to the analysis module 400, the analysis module 400 extracts and analyzes each grid line in the measurement image, and judging the attitude of the integrally measured grid line according to the analyzed attitude of each grid line segment, and determining the surface flatness of the whole corrugated board.
Further, the measurement image comprises the corrugated cardboard and the measurement grid on the corrugated cardboard.
Furthermore, the measurement images are acquired from different angles and different positions through the plurality of acquisition modules 300, so that the later extraction and analysis of the measurement grids are clearer and more accurate.
Further, the transport module 100 may employ a test station, and the projection module 200 and the collection module 300 may be mounted on the test station in the same manner and position.
Further, collection module 300 and analysis module signal connection, collection module 300 sends the measurement image who acquires to analysis module through wireless signal, and wherein wireless signal can adopt 4G or 5G, infrared communication, bluetooth etc..
As shown in fig. 2, 4 and 5, in one embodiment, the projection module 200 includes a projection end unit 210, a first moving assembly unit 220 and a second moving assembly unit 230, the projection end unit 210 is used for emitting a measurement grid, the first moving assembly unit 220 is used for driving the projection end unit 210 to move along the moving direction of the conveying module 100, the second moving assembly unit 230 is used for driving the projection end unit 210 to move along the moving direction perpendicular to the conveying module 100, and the first moving assembly unit 220 and the second moving assembly unit 230 are used for driving the projection end 212 to move, so that the flatness of corrugated boards with different sizes can be detected.
The first moving assembly unit 220 includes two sets of moving units, the two sets of moving units are respectively disposed at two sides of the conveying module 100, the moving units include a first sliding rail 221 and a first sliding block 222, the first sliding rail 221 is fixed at a side surface of the conveying module 100, and the first sliding block 222 is slidably connected to the first sliding rail 221 and slides along a moving direction of the conveying module 100.
Specifically, the first slide rail 221 is fixedly disposed on the side surface of the conveying module 100 along the conveying direction of the conveying module 100, the length of the first slide rail 221 is the same as that of the conveying module 100, a "T" -shaped slide rail is fixedly connected to the first slide rail 221, a "T" -shaped slide groove is formed in the first slide block 222, and the slide rail is embedded in the slide groove, so that the lower surface of the first slide block 222 is attached to the upper surface of the first slide rail 221, and further the first slide block 222 is limited to linearly slide only along the movement direction of the conveying module 100, and the movement direction of the first slide block 222 is defined as moving along the Y-axis direction.
The second moving assembly unit 230 includes a second slide rail 231 and a second slider 232, the second slide rail 231 is fixedly connected to the first slider 222 through a support rod fixed at two ends of the second slide rail 231, and the second slider 232 is slidably connected to the second slide rail 231 and slides in a direction perpendicular to the moving direction of the conveying module 100.
Specifically, both ends at second slide rail 231 are fixed with branch respectively, form "door" type support through two branches and second slide rail 231, keep away from the one end and the first slider 222 fixed connection of second slide rail 231 with branch, thereby realize that first removal subassembly unit 220 drives second removal subassembly unit 230 and is the rectilinear slide along the direction of motion of carrying module 100, dovetail type spacing groove has been seted up at the lower surface of second slide rail 231, the rigid coupling has the stopper with spacing groove matched with on a side of second slider 232, stopper sliding connection is in the spacing inslot, and then restrict second slider 232 and carry module 100 direction of motion to the upward movement along the perpendicular to, define the direction of motion of second slider 232 as moving along the X axle direction.
The projection end 212 is fixed on the second sliding block 232, the projection surface of the projection end 212 faces the conveying module 100, the projection end 212 is fixed on an end surface of the second sliding block 232 away from the limiting block, and the first moving assembly unit 220 and the second moving assembly unit 230 drive the projection end 212 to move along the X-axis direction or the Y-axis direction.
Further, the first moving assembly unit 220 and the second moving assembly unit 230 are both provided with the same driving unit, the driving unit includes a driving motor, a lead screw and a nut, for example, in the first moving assembly unit 220, the nut is fixedly installed in the first slider 222, the driving motor is installed at one end of the moving unit, an output shaft of the driving motor is fixedly connected with one end of the lead screw, the other end of the driving motor is rotatably connected with the moving unit, the lead screw is in threaded connection with the nut, the lead screw is driven by the driving motor to rotate, the lead screw drives the nut to make linear movement, and therefore the first slider 222 moves on the first sliding rail 221. The driving unit may be a device that can move the first slider 222 on the first slide rail 221, such as an air cylinder.
Further, the position limiting on the first moving assembly unit 220 and the second moving assembly unit 230 may adopt any position limiting method and structure, and is not limited to the structure and shape given in this application.
In one embodiment, the projection end unit 210 further includes a rotating unit 211 and a projection end 212, and the rotating unit 211 is configured to drive the projection end 212 to rotate clockwise or counterclockwise in a direction perpendicular to the moving direction of the conveying module 100.
Specifically, the projection end 212 is fixed below the second slider 232 through the rotating unit 211, and the rotating unit 211 drives the projection end 212 to rotate clockwise or counterclockwise at a fixed speed perpendicular to the moving direction of the conveying module 100. Because the surface of the corrugated board is likely to have a transverse or longitudinal arch shape which is regularly distributed; or the arch degree of the arch is not obvious, the arch is not easy to detect by the measuring grid in a single direction, and the arch on the corrugated board can be conveniently detected by rotating and projecting the measuring grid in different directions.
Further, the rotating unit 211 may be a pan/tilt head, and other devices having rotation along a rotation axis may be used.
Furthermore, the grid lines of the measurement grid adopt single colors such as red, green and the like which have high brightness and large color difference with the surface of the corrugated board, so that subsequent extraction and analysis of the grid lines are facilitated.
Further, the projection end 212 may employ laser projection, infrared projection, or the like.
In one embodiment, the collecting module 300 includes a shooting unit 310 and a sending unit 320, the shooting unit 310 is used for obtaining a measurement image of a measurement grid of the surface of the corrugated cardboard to be detected, and the sending unit 320 is used for sending the measurement image to the analyzing module 400.
Further, the shooting unit 310 employs a camera, and the shooting angle of the camera faces the measurement grid of the surface of the corrugated cardboard to be detected.
The camera is fixed on the support rod through a bracket, so that the shooting angle of the camera faces to the object carrying surface of the conveying module 100, and the camera cannot interfere with the measuring grid projected by the projection end 212.
Further, the collecting module 300 includes a collecting and adjusting unit and a sensor, and detects the position of the corrugated board through the sensor, and further adjusts the shooting angle of the camera by using the collecting and adjusting unit, so that the camera can shoot the measured image comprehensively and accurately.
Furthermore, the plurality of shooting units 310 are used for collecting the measurement images at different angles and different positions, so that the extraction and analysis of each grid line in the measurement grid at the later stage are facilitated.
In one embodiment, the analysis module 400 includes a receiving module 410, an extracting module 420, and an analysis module 430, where the receiving module 410 is configured to receive the measurement image sent by the acquisition module 300, the extracting module 420 is configured to extract each grid line in the measurement image, and the analysis module 430 is configured to analyze the flatness of each grid line.
As shown in fig. 6 and 7, after receiving the measurement image sent by the acquisition module 300, the analysis module 400 extracts and analyzes each grid line of the measurement grid in the measurement image, and if each grid line of the measurement grid presents a straight extending and mutually parallel posture, the surface flatness of the corrugated board is good, as shown in positions a and b in fig. 7, if a line segment of a part of grid lines of the measurement grid presents a posture of distortion, interruption and dislocation, the surface flatness of the corrugated board is poor, and there are transverse arches, longitudinal arches, or any arches.
When the surface evenness of the corrugated paperboard is analyzed to be poor, the sub-extraction unit of the analysis module 400 extracts a local image of a distribution area of grid line segments with distorted and interrupted malposed postures, the local image is compared with a template preset in the analysis module 400 through a comparison unit to obtain a corresponding matched template, the current surface evenness of the corrugated paperboard is graded according to the matched template type, and whether the corrugated paperboard is scrapped or available (namely, the corrugated paperboard is applied to occasions with low evenness requirements) is confirmed.
For example, when the surface flatness of the corrugated cardboard is 10 percent of the transverse camber, the analysis module 400 detects that the surface flatness of the corrugated cardboard is poor, then the analysis module 400 extracts a local image of a grid line segment for measuring the transverse camber in the measurement grid of the corrugated cardboard, compares the local image with the template, matches the local image with the template to a corresponding template, and if the type of the template is usable, classifies the corrugated cardboard as usable.
The following describes in detail with reference to fig. 6 to 9, and based on the same inventive concept, the embodiment of the present invention also provides a first embodiment of a flatness measuring method for corrugated board production. Because the principle of the problem solved by the method is similar to that of the flatness measuring device for corrugated board production, the implementation of the method is based on the implementation of the device, and repeated details are not repeated. This embodiment is mainly applied to and measures corrugated container board surface smoothness, treat to detect corrugated container board surface through the projection module and throw the measurement net, collection module acquires the measurement image who treats to detect corrugated container board surface measurement net, and send to analysis module, analysis module draws and analyzes each grid line in the measurement image, and judge the gesture of each grid line, thereby judge corrugated container board surface smoothness, can be high accurate, high efficiency, objectively carry out the roughness to whole corrugated container board surface and detect, the effectual rejection rate and the fault outage rate that reduces follow-up production link.
As shown in fig. 6 to 9, the present embodiment mainly includes the following steps:
1000. projecting a measurement grid to the surface of the corrugated board to be detected;
in step 1000, the first moving component unit and the second moving component unit in the projection module adjust the position of the projection end to project the measurement grid to the surface of the corrugated board to be detected, so that the whole surface of the corrugated board is covered with the measurement grid.
2000. Acquiring a measurement image of a measurement grid on the surface of a corrugated board to be detected;
in step 2000, a measurement image of the measurement grid on the surface of the corrugated board to be detected is obtained by the camera, and the obtained measurement image is sent to the analysis module.
3000. Extracting and analyzing each grid line in the measurement image;
4000. and judging the posture of each grid line in the measurement grid.
In step 3000, the analysis module extracts and analyzes each grid line of the measurement grid in the measurement image, and in step 4000, the analysis module determines the posture of each grid line by analyzing the position and shape of each grid line, and determines the surface flatness of the corrugated cardboard.
In one embodiment, in step 4000, determining the pose of each grid line in the measurement grid specifically includes:
if each grid line of the measuring grid presents a straight extending and mutually parallel posture, the surface evenness of the corrugated board is good;
as shown in fig. 7 a and b, if each grid line of the measurement grid has a distorted, interrupted and dislocated posture, the surface flatness of the corrugated cardboard is not good.
Further, the corrugated board has poor surface flatness and may have a transverse arch shape, a longitudinal arch shape, or an arbitrary arch shape.
As shown in fig. 8, in one embodiment, if the posture of each grid line of the measurement grid is distorted or interrupted and dislocated, the surface flatness of the corrugated board is not good, and then the method further comprises the following steps:
4001. extracting local images of the grid line segments with distorted, interrupted and misplaced postures;
4002. comparing the local image with a preset template to obtain a matching template;
4003. the corrugated board is graded.
In one embodiment, in step 4003, the corrugated cardboard is graded, specifically including:
the surface flatness of the corrugated cardboard is graded with reference to the type of the template.
When the surface evenness of the corrugated paperboard is judged to be poor, the sub-extraction unit extracts a local image of a distribution area of grid line segments with distorted and interrupted dislocation postures, the comparison unit compares the local image with a template preset in the analysis module to obtain a corresponding matched template, the current surface evenness of the corrugated paperboard is graded according to the matched template type, and whether the corrugated paperboard is scrapped or available (namely, the corrugated paperboard is applied to occasions with low evenness requirements) is confirmed.
For example, when the surface flatness of the corrugated cardboard is 10 percent of the transverse camber, the analysis module detects that the surface flatness of the corrugated cardboard is poor, then the analysis module extracts a local image of a grid line segment for measuring the transverse camber in a measurement grid of the corrugated cardboard, compares the local image with a template, matches the local image with the template to a corresponding template, and if the type of the template is utilizable, classifies the corrugated cardboard as utilizable.
In one embodiment, in step 4003, the method further comprises:
4004. and distributing the corrugated boards to corresponding conveying units according to the detection grading result.
The analysis module is connected to a management system of the corrugated board production line, and corrugated boards are distributed to corresponding conveying units according to the detection grading result, so that automatic classification is realized. A branch conveyor is further arranged at the tail end of the conveying module with the downward gradient, and after the corrugated board of the conveying module is received by the branch conveyor, the corrugated board is transferred to a corresponding storage box.
The specific structures of the components such as the projection module, the acquisition module, the analysis module and the like in this embodiment can refer to the structural arrangement described in the first embodiment of the flatness measuring device for corrugated board production, and are not described in detail again.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A flatness measuring device for corrugated board production, comprising: the system comprises a conveying module, a projection module, an acquisition module and an analysis module;
the conveying module is used for conveying the corrugated board to be detected;
the projection module is used for projecting a measurement grid to the surface of the corrugated board to be detected;
the acquisition module is used for acquiring a measurement image of the measurement grid on the surface of the corrugated board to be detected and sending the measurement image to the analysis module;
the analysis module is used for extracting and analyzing each grid line in the measurement image and judging the posture of the measurement grid line;
the acquisition module is in signal connection with the analysis module.
2. A flatness measuring device for corrugated board production according to claim 1, wherein said projection module includes a projection end unit, a first moving assembly unit and a second moving assembly unit;
the projection end unit is used for transmitting a measurement grid;
the first moving assembly unit is used for driving the projection end unit to move along the movement direction of the conveying module;
the second moving assembly unit is used for driving the projection end unit to move along the direction vertical to the moving direction of the conveying module.
3. A flatness measuring device for corrugated cardboard production according to claim 2, wherein said projection end unit further comprises a rotation unit and a projection end;
the rotating unit is used for driving the projection end to rotate clockwise or anticlockwise in the direction perpendicular to the moving direction of the conveying module.
4. A flatness measuring device for corrugated board production according to claim 1, wherein said acquisition module comprises a photographing unit and a transmitting unit;
the shooting unit is used for acquiring a measurement image of the measurement grid on the surface of the corrugated board to be detected;
the sending unit is used for sending the measurement image to the analysis module.
5. A flatness measuring device for corrugated board production according to claim 1, wherein said analyzing module comprises a receiving unit, an extracting unit and an analyzing unit;
the receiving unit is used for receiving the measurement image sent by the acquisition module;
the extraction unit is used for extracting each grid line in the measurement image;
the analysis unit is used for analyzing the flatness of each grid line.
6. A method of measuring a flatness measuring device for corrugated board production according to any of claims 1 to 5, comprising the steps of:
projecting a measurement grid to the surface of the corrugated board to be detected;
acquiring a measurement image of the measurement grid on the surface of the corrugated board to be detected;
extracting and analyzing each grid line in the measurement image;
and judging the posture of each grid line in the measurement grid.
7. The measurement method according to claim 6, wherein the determining the pose of each grid line in the measurement grid specifically comprises:
if each grid line of the measuring grid presents a straight extending and mutually parallel posture, the surface evenness of the corrugated board is good;
if the grid lines of the measurement grid have the postures of distortion, interruption and dislocation, the surface flatness of the corrugated board is poor.
8. The method of claim 7, wherein the surface flatness of the corrugated cardboard is poor if there is a distortion or a discontinuous dislocation of each grid line of the measuring grid, and thereafter, the method further comprises the steps of:
extracting local images of the grid line segments with distorted, interrupted and misplaced postures;
comparing the local image with a preset template to obtain a matched template;
the corrugated board is graded.
9. The method of claim 8, wherein the step of grading the corrugated cardboard comprises:
the surface flatness of the corrugated cardboard is graded with reference to the type of the template.
10. The method of measuring according to claim 8, wherein said grading of corrugated cardboard, thereafter, further comprises:
and distributing the corrugated boards to corresponding conveying units according to the detection grading result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110426190.3A CN113251955A (en) | 2021-04-20 | 2021-04-20 | Flatness measuring device and method for corrugated board production |
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| CN202110426190.3A CN113251955A (en) | 2021-04-20 | 2021-04-20 | Flatness measuring device and method for corrugated board production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022208363A1 (en) | 2022-08-11 | 2024-02-22 | Bhs Corrugated Maschinen- Und Anlagenbau Gmbh | Corrugated cardboard plant and method for checking the flatness of sheets of corrugated cardboard |
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2021
- 2021-04-20 CN CN202110426190.3A patent/CN113251955A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022208363A1 (en) | 2022-08-11 | 2024-02-22 | Bhs Corrugated Maschinen- Und Anlagenbau Gmbh | Corrugated cardboard plant and method for checking the flatness of sheets of corrugated cardboard |
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Application publication date: 20210813 |