Tracking and positioning system of flexible material bag making machine

Abstract

The invention relates to the technical field of cutting positioning, and discloses a flexible material bag making machine tracking and positioning system which comprises a visual collection unit used for collecting images of a preset target area and a marking module which comprises a transverse marking device and a vertical marking device. The transverse scriber and the vertical scriber are used for scribing on the surface of the flexible material, and the hot-pressing knife is used for hot-pressing a segmentation pattern and adjusting the transverse or longitudinal position. According to the invention, the industrial camera is used for image acquisition, when the industrial camera and the hot-pressing knife deviate, the offset is measured, and the position of the hot-pressing knife is controlled to carry out transverse or longitudinal reverse adjustment, so that the hot-pressing knife always coincides with the transverse scriber, the vertical scriber and the #-shaped line of the travels of the transverse standard line and the vertical standard line; and the offset size is compensated, and hot pressing treatment is carried out, so that timely adjustment during pattern offset is realized, and the method can adapt to offset compensation of patterns of various sizes.

Description

Technical Field

[0001] The invention relates to the technical field of cutting and positioning, in particular to a tracking and positioning system for a flexible material bag making machine. Background Art

[0002] The flexible material bag packaging production line comprises a packaging material unwinding device, a sealing and cutting device, an inkjet coding device, a bag storage table, a bag picking and delivering device, a bag picking device and a quantitative unloading device. The packaging material unwinding device, the sealing and cutting device and the bag storage table are arranged in sequence. The inkjet coding device is installed on the top of the sealing and cutting device. The bag picking and delivering device is arranged on the top of the bag storage table. The bag picking and delivering device is connected to the bag picking device. The quantitative unloading device is arranged on the top of the bag picking device. The invention can complete bag packaging tasks with various packaging specifications, and can automatically and flexibly realize the processes of quantitative unloading, packaging material unwinding, packaging bag sealing and cutting, inkjet coding, bag placing, bag sorting, counting and conveying. It has wide adaptability and can meet the requirements of medium and large bag packaging of most packaging materials.

[0003] The hot knife hot pressing structure in the flexible material bag making machine, when the printed pattern does not change much and the material does not stretch much after hot pressing, it can be considered that the hot seam position required by the design is basically unchanged. The hot knife is manually moved to determine the hot seam position, which can basically meet the above requirements; However, in actual production, flexible materials also include printing, laminating, and aging before the bag-making process. Due to changes in tension, temperature and other factors, the length of the printed pattern itself changes to a certain extent. In addition, in the bag-making process, the flexible material is constantly pressed in the hot knife heating environment, and the bag-making machine is constantly doing a traction-stop cycle, and the tension fluctuates greatly. When the pattern passes through the hot knife, the length of the pattern will change greatly, especially for heat-sensitive, easy-to-stretch thin materials, such as using a single material PE film. The hot pressing method with a fixed hot knife position will cause the relative position of the hot seam and the pattern to change continuously. The hot seams of the front and rear hot knives cannot overlap and are constantly moving relative to each other, which affects the size and quality of the product and causes a large amount of material waste. Therefore, there is an urgent need for a method that can detect the pattern position in real time and adjust the heat sealing knife pressing position according to the pattern position to ensure that the position of the heat sealing knife tracks the pattern in real time. Even when the pattern changes back and forth, the relative position of the heat sealing mark and the pattern can be guaranteed to change with the pattern. Summary of the invention

[0004] The present invention provides a tracking and positioning system for a flexible material bag making machine, which has the function of detecting the position of a pattern in real time and adjusting the hot pressing position of a heat sealing knife according to the position of the pattern, thereby ensuring that the position of the heat sealing knife tracks the pattern in real time. Even when the pattern changes front and back, the method can ensure that the relative position of the heat sealing mark and the pattern changes with the pattern. The system solves the problems mentioned in the above background technology that the flexible material is constantly hot pressed in the hot knife heating environment, and the bag making machine is constantly performing a traction-stop cycle motion, the tension has large fluctuations, and the hot pressing method with a fixed hot knife position will cause the relative position of the hot seam and the pattern to change continuously, the hot seams of the front and rear hot knives cannot overlap and are constantly moving relative to each other, thereby affecting the size and quality of the product, generating a large amount of waste and the problem of material position offset.

[0005] The present invention provides the following technical solution: a tracking and positioning system for a flexible material bag making machine, comprising: A visual acquisition unit, used to acquire images of a preset target area; A marking module, wherein the marking module includes a horizontal marking device and a vertical marking device; The horizontal marking tool and the vertical marking tool are used for marking the surface of the flexible material; A hot pressing knife, which is used for hot pressing the segmentation pattern and adjusting the position in the horizontal or vertical direction; A marking module is used to mark a pattern.

[0006] As an optional solution of the tracking and positioning system for the flexible material bag making machine of the present invention, the pattern data includes pattern area, interval data between two patterns and overall width data of the flexible material.

[0007] As an optional solution of the tracking and positioning system for the flexible material bag making machine of the present invention, wherein: the visual acquisition unit includes an industrial camera, a storage module, a control panel and a graphics processor; An industrial camera is used for image acquisition and detection of pattern data, obtaining width data of the flexible material, a pattern and data between two patterns, and storing them in a storage module at the same time; The graphic processor synchronously processes the data in the storage module to obtain the length and width of the pattern.

[0008] As an optional solution of the tracking and positioning system for the flexible material bag making machine of the present invention, wherein: the control panel includes control buttons and a display, and a horizontal standard line and a vertical standard line are pre-set in the industrial camera; The horizontal standard lines and the vertical standard lines are staggered and combined to form a tic-tac-toe shape; And the vertical standard line and the horizontal standard line are both set between the two patterns.

[0009] As an optional solution of the tracking and positioning system of the flexible material bag making machine of the present invention, wherein: the transverse scriber is used to scribe on the flexible material, the scribe position is scribe horizontally between two patterns, and the vertical scriber is used to scribe vertically between two patterns; The horizontal lines and the vertical lines are interlaced with each other and displayed in a tic-tac-toe shape.

[0010] As an optional solution of the tracking and positioning system for the flexible material bag making machine of the present invention, the horizontal standard lines and the vertical standard lines in the industrial camera completely coincide with the horizontal marking lines and the vertical marking lines on the upper surface of the flexible material.

[0011] As an optional solution of the flexible material bag making machine tracking and positioning system of the present invention, the result is obtained by completely overlapping the horizontal standard line and the vertical standard line with the horizontal marking line and the vertical marking line, and through the shooting of the industrial camera and the judgment of the graphics processor.

[0012] As an optional solution of the tracking and positioning system of the flexible material bag making machine of the present invention, wherein: when the horizontal scribing line and the vertical scribing line are not in an overlapping position with the horizontal standard line and the vertical standard line; The industrial camera is used to detect the offset size of the two. At the same time, the position of the hot pressing knife is adjusted in the opposite direction in the horizontal or vertical direction.

[0013] As an optional solution of the tracking and positioning system of the flexible material bag making machine described in the present invention, the cutting module includes a transverse cutting knife and a vertical cutting knife, and the transverse cutting knife and the vertical cutting knife both cut along the transverse scoring line and the vertical scoring line.

[0014] As an optional solution of the tracking and positioning system of the flexible material bag making machine described in the present invention, the marking module includes a marking pen tip, the number of the marking pen tips is consistent with the number of each row of patterns, and the marking pen tip is used to mark unqualified pattern structures.

[0015] The present invention has the following beneficial effects: 1. The tracking and positioning system of the flexible material bag making machine uses an industrial camera to collect images and a graphics processor to measure graphics. When the two are offset, a warning is issued through the control panel, and the offset is calculated. The position of the hot pressing knife is then controlled to make a lateral or longitudinal reverse adjustment, so that the hot pressing knife always coincides with the tic-tac-toe line of the lateral scriber and the vertical scriber and the lateral standard line and the vertical standard line, and the offset size is compensated, and hot pressing treatment is performed, thereby achieving timely adjustment of the pattern offset, and being able to adapt to the offset compensation of patterns of various sizes, so as to be able to adapt to hot pressing processing of various size differences. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall process of the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Example 1, please refer to Figure 1-Figure 1 , wherein a tracking and positioning system for a flexible material bag making machine comprises, A visual acquisition unit, used to acquire images of a preset target area; The marking module includes a horizontal marking device and a vertical marking device; Horizontal and vertical scribers are used for marking the surface of flexible materials; Hot pressing knife, which is used for hot pressing segmentation patterns and horizontal or vertical position adjustment; A marking module, which is used to mark patterns; The pattern data includes pattern area, two pattern interval data and overall width data of the flexible material; The visual acquisition unit includes an industrial camera, a storage module, a control panel, and a graphics processor; Industrial camera: The industrial camera is used for image acquisition and detection of pattern data, and obtains the width data of the flexible material, the pattern and the data between two patterns, and stores them in the storage module at the same time; The graphics processor synchronously processes the data in the storage module to obtain the length and width of the pattern.

[0019] The control panel includes control buttons and a display, and horizontal standard lines and vertical standard lines are pre-set in the industrial camera; The horizontal standard lines and the vertical standard lines are staggered to form a tic-tac-toe shape; And the vertical standard line and the horizontal standard line are both set between the two patterns.

[0020] The horizontal scriber is used to scribe on the flexible material, and the scribe position is scribe horizontally between two patterns, and the vertical scriber is used to scribe vertically between two patterns; The horizontal and vertical lines are interlaced and displayed in a tic-tac-toe pattern; The horizontal standard lines and vertical standard lines in the industrial camera completely coincide with the horizontal and vertical lines on the upper surface of the flexible material; The result is obtained by completely overlapping the horizontal standard line and the vertical standard line with the horizontal marking line and the vertical marking line, and photographing by an industrial camera and judging by a graphics processor; When the horizontal and vertical lines are no longer in overlapping positions with the horizontal and vertical standard lines; The offset size of the two can be detected by industrial camera. At the same time, the position of the hot pressing knife is adjusted in the opposite direction horizontally or vertically; A cutting module, the cutting module includes a transverse cutting knife and a vertical cutting knife, and the transverse cutting knife and the vertical cutting knife both cut along the transverse scoring line and the vertical scoring line; The marking module includes a marking pen head, the number of which is consistent with the number of patterns in each row, and the marking pen head is used to mark unqualified pattern structures.

[0021] The flexible material is in the form of a film. The flexible material is rolled up by a roller, and a pattern is printed on the upper surface of the flexible material by a printing device. The pattern is arranged in a tic-tac-toe pattern on the upper surface of the flexible material. When the roller rolls up the flexible material and conveys it forward, the industrial camera detects the size of the pattern on the conveyed flexible material and the flexible material. Industrial cameras collect light from external objects through lenses and convert them into electrical signals. They use CCD or CMOS photosensitive elements to convert the physical image on the photosensitive element into electronic signals. The photosensitive element adopts an array structure, and each pixel corresponds to a photosensitive element. Convert electrical signals into analog signals. The analog circuit inside the industrial camera amplifies and filters the collected electrical signals to enhance the quality and clarity of the image. It can also convert analog signals into digital signals. After being processed by an analog-to-digital converter, the analog signals are converted into digital signals for subsequent digital processing and image analysis; The processed image data is transmitted to an external device. The industrial camera has fast image acquisition capability and can quickly capture moving objects, so it is suitable for pattern transmission. The image data is transmitted to the graphics processor for processing, and the area size data of the pattern and the distance between the front, back, left and right sides of the two patterns are obtained. The collected graphic data is then transmitted to the graphics processor; It is processed by the graphics processor, which works in three main stages: geometry processing, rasterization, and pixel processing; In the geometry processing stage, the GPU receives geometric data from the CPU, such as vertex coordinates, normal vectors, etc. The GPU transforms, projects, and clips these data through parallel processing units to generate screen space coordinates of geometric primitives such as triangles. Next is the rasterization stage, where the GPU converts geometric primitives into pixels. This process includes three main steps: triangle setup, triangle traversal, and pixel interpolation. In triangle setup, the GPU determines the boundaries and attributes of the triangle to be drawn. In triangle traversal, the GPU determines whether each pixel is inside the triangle based on the boundaries and attributes of the triangle and generates fragments. In pixel interpolation, the GPU interpolates the attributes of the fragments to obtain the color, depth and other information of each pixel. Finally, in the pixel processing stage, the GPU processes each pixel. This stage includes steps such as texture sampling, pixel shading and output synthesis; In texture sampling, the graphics processor obtains texture data from the texture memory for use in pixel shading. In pixel shading, the graphics processor uses the shader to calculate each pixel to determine its final color value. In output compositing, the graphics processor writes the pixel's color value to the frame buffer and finally outputs it to the display. The architecture of a graphics processor is usually composed of multiple SMs. SMs are units composed of multiple stream processors, usually used to process tasks of a work group. Each SM has multiple thread execution units. These threads can perform calculations simultaneously, making full use of the parallel computing capabilities of the graphics processor. Each SM contains multiple processing units, and each processing unit can execute multiple threads to achieve parallel computing. In addition, the graphics processor also has a cache and memory controller to provide fast data access and transmission; Graphics processors achieve efficient processing of graphics and image data through parallel processing units and high memory bandwidth. Its working principle includes three stages: geometry processing, rasterization, and pixel processing. Through the coordinated work of these stages, the functions of graphics rendering and calculation are realized; Then, use the horizontal and vertical scribers to scribe the middle part between each pattern, staggering horizontally and vertically to form a tic-tac-toe shape; And before that, the industrial camera has preset horizontal standard lines and vertical standard lines, and the horizontal standard lines and vertical standard lines will always be between the two patterns according to the measurement, and completely overlap with the tic-tac-toe shape formed by the horizontal scriber and the vertical scriber; The image is collected by an industrial camera, and the graphics are calculated by a graphics processor. When the two are offset, a warning is issued through the control panel, and the offset is calculated. The position of the hot pressing knife is then controlled to make a lateral or longitudinal reverse adjustment, so that the hot pressing knife always coincides with the tic-tac-toe lines of the lateral scriber and the vertical scriber as well as the lateral standard line and the vertical standard line. The offset size is compensated, and hot pressing treatment is performed, thereby achieving timely adjustment of the pattern offset, and being able to adapt to the offset compensation of patterns of various sizes, thereby being able to adapt to hot pressing processing of various size differences.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0023] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A tracking and positioning system for a flexible material bag making machine, comprising: A visual acquisition unit, used to acquire images of a preset target area; A marking module, wherein the marking module includes a horizontal marking device and a vertical marking device; The horizontal marking tool and the vertical marking tool are used for marking the surface of the flexible material; A hot pressing knife, which is used for hot pressing the segmentation pattern and adjusting the position in the horizontal or vertical direction; A marking module is used to mark a pattern.

2. The tracking and positioning system for a flexible material bag making machine according to claim 1, characterized in that: The pattern data includes pattern area, interval data between two patterns and overall width data of the flexible material.

3. The tracking and positioning system for a flexible material bag making machine according to claim 1, characterized in that: The visual acquisition unit includes an industrial camera, a storage module, a control panel and a graphics processor; An industrial camera is used for image acquisition and detection of pattern data, obtaining width data of the flexible material, a pattern and data between two patterns, and storing them in a storage module at the same time; The graphic processor synchronously processes the data in the storage module to obtain the length and width of the pattern.

4. The tracking and positioning system for a flexible material bag making machine according to claim 3 is characterized in that: The control panel includes control buttons and a display, and horizontal standard lines and vertical standard lines are pre-set in the industrial camera; The horizontal standard lines and the vertical standard lines are staggered and combined to form a tic-tac-toe shape; And the vertical standard line and the horizontal standard line are both set between the two patterns.

5. The tracking and positioning system for a flexible material bag making machine according to claim 1, characterized in that: The horizontal scriber is used to scribe a line on the flexible material, and the scribe position is scribed horizontally between two patterns, and the vertical scriber is used to scribe vertically between two patterns; The horizontal lines and the vertical lines are interlaced with each other and displayed in a tic-tac-toe shape.

6. The tracking and positioning system for a flexible material bag making machine according to claim 5, characterized in that: The horizontal standard lines and the vertical standard lines in the industrial camera completely coincide with the horizontal marking lines and the vertical marking lines on the upper surface of the flexible material.

7. The tracking and positioning system for a flexible material bag making machine according to claim 6, characterized in that: The result is obtained by completely overlapping the horizontal standard line and the vertical standard line with the horizontal marking line and the vertical marking line, and by photographing with the industrial camera and judging with the graphics processor.

8. The tracking and positioning system for a flexible material bag making machine according to claim 7, characterized in that: When the horizontal dashed line and the vertical dashed line are no longer in an overlapping position with the horizontal standard line and the vertical standard line; The industrial camera is used to detect the offset size of the two. At the same time, the position of the hot pressing knife is adjusted in the opposite direction in the horizontal or vertical direction.

9. The tracking and positioning system for a flexible material bag making machine according to claim 8, characterized in that: A cutting module, wherein the cutting module comprises a transverse cutting knife and a vertical cutting knife, wherein the transverse cutting knife and the vertical cutting knife both cut along the transverse scoring line and the vertical scoring line.

10. The tracking and positioning system for a flexible material bag making machine according to claim 1, characterized in that: A marking module, wherein the marking module comprises marking nibs, the number of which is consistent with the number of each row of patterns, and the marking nibs are used to mark unqualified pattern structures.

Images