TW201819206A - Inkjet position alignment system and inkjet device with automatic position alignment function that is applied to acquiring ink-jetting position related parameter data from a plain color vacuum-forming board having a plurality of dents - Google Patents

Abstract

An inkjet position alignment system is applicable to acquiring ink-jetting position related parameter data from a plain color vacuum-forming board having a plurality of dents. The inkjet position alignment system comprises an image-taking unit and a processing unit. The image-taking unit is provided for lighting the plain color vacuum-forming board and for capturing at least one image. The processing unit is provided for receiving and analyzing the image to carry out calculation on coloring blocks defined by the dents and, and based on feature matching performed between a plurality of design blocks obtained through operation of a design drawing file and the coloring blocks, the processing unit acquires the parameter data related to the result of feature matching. In the process of analyzing the image, the processing unit detects the reflection intensity of the plain color vacuum-forming board and adjusts the intensity of lighting of the image-taking unit according to the reflection intensity.

Description

Inkjet registration system and inkjet equipment with automatic registration function

The invention relates to a system and equipment, in particular to an inkjet registration system and an inkjet device with an automatic registration function.

Because the No Sew process can streamline the manpower requirements of the manufacturing process and reduce the cutting, sewing and trimming processes required, the manufacturing cost can be reduced and the production capacity can be increased. The leather goods industry is gradually being widely used. Among them, the vacuum blister technology can quickly form the distribution of patterns such as stitches, marks or specific graphics to achieve various changes in appearance. Therefore, it is most commonly used in carless sewing processes. .

However, because vacuum blister technology must be applied to a mold by heating the blister board to soften it, and then vacuum blister molding. Therefore, the blister board must undergo temperature rise and fall during the molding process, and this temperature change process will inevitably affect the pigment on the blister board, so that the color and design of the product after molding are likely to be greatly different. Therefore, for the shoe industry with high product color requirements, vacuum blistering technology is used to make the upper, and the process sequence must be adjusted. For example, vacuum blister molding of a plain plastic blister board to form a shoe upper. The inkjet process is performed. However, for the plastic plate that has been formed into a three-dimensional shape, in order for the inkjet device to perform the inkjet operation correctly at the corresponding position, it must be placed and adjusted by the operator from the side. Processing flexibility.

Therefore, one of the objects of the present invention is to provide an inkjet alignment system, which is suitable for obtaining a parameter data related to the inkjet position from a plain vacuum blister board having a plurality of dents, so that the inkjet device can Based on the parameter data, the position where ink is ejected from the plain vacuum blister is accurately and automatically adjusted.

Therefore, the inkjet registration system of the present invention includes a camera unit and a processing unit.

The camera unit is configured to illuminate the plain vacuum plastic plate and capture at least one image.

The processing unit is used for receiving and analyzing the image to calculate colored blocks defined by the dents respectively, and the processing unit is based on the complex design blocks and the colored blocks calculated by a design drawing file. Feature matching is performed to obtain the parameter data related to the result of feature matching. During the analysis of the image, the processing unit detects the light reflection intensity of the plain vacuum blister board to adjust the lighting intensity of the camera unit according to the reflection intensity.

Another object of the present invention is to provide an ink-jet device with an automatic registration function using the above-mentioned ink-jet registration system, which is suitable for combining at least one plain vacuum plastic plate with a plurality of dents and a design drawing file. The shape feature is captured and analyzed to obtain a parameter data related to the inkjet position, so that the inkjet device can accurately and automatically adjust the inkjet position of the plain vacuum blister board based on the parameter data.

The inkjet device includes a machine unit, a camera unit, and a processing unit.

The machine unit includes an inkjet device, a conveying device for conveying the plain vacuum blister plate to the inkjet device, and a support provided above the conveying device.

The camera unit is disposed on the bracket and includes at least one camera and a lighting device. The camera captures at least one image toward a plain vacuum blister on the conveying device. The polishing device shines light on the plain vacuum blister sheet.

The processing unit includes a controller that is signally connected to the machine unit and the camera unit, and a processor that is signally connected to the controller and stores the design file. The processor receives and analyzes the image to calculate colored blocks whose complex numbers are respectively defined by the dents, and performs feature matching with the colored blocks based on the complex design blocks calculated by the design drawing file, and Obtain the parameter data related to the result of feature matching. The controller controls the inkjet position of the inkjet device relative to the plain vacuum blister board according to the parameter data. During the analysis of the image, the processor detects the light reflection intensity of the plain vacuum blister board to adjust the lighting intensity of the lighting device according to the reflection intensity.

The effect of the present invention is that through the machine vision constructed by the camera unit and the processing unit, the inkjet device can automatically and correctly perform the inkjet operation on the corresponding colored block, and it is no longer necessary to manually discharge the inkjet device. The plain vacuum blister board can improve production efficiency and processing flexibility, and can also reduce human resources.

Referring to FIG. 1 and FIG. 2, an embodiment of an inkjet device with an automatic alignment function according to the present invention includes a machine unit 100, a camera unit 200, and a processing unit 300. The shape characteristics of the plain vacuum blister board 400 (see FIG. 5) and a design drawing file 500 are extracted and analyzed to obtain a parameter data related to the inkjet position. It should be noted that, in this embodiment, the color of the plain vacuum blister plate 400 is white, which is the most common color in general, but it is not limited thereto, and other colors can be used according to product requirements.

The machine unit 100 includes an inkjet device 110, a transport device 120 for transporting the plain vacuum blister sheet 400 to the inkjet device 110, and a support 130 disposed above the transport device 120.

With reference to FIG. 3 and FIG. 4, the camera unit 200 includes a camera 210, a lighting device 220 provided on the bracket 130 and shining light on the plain vacuum plastic plate 400, and a lighting device 220 provided on the bracket 130 and provided for A servo device 230 is provided in the camera 210. The camera 210 captures at least one image toward the plain vacuum plastic plate 400 on the conveying device 120. The servo device 230 is used to drive the camera 210 to move along a first direction D1.

The processing unit 300 includes a controller 310 that is signally connected to the machine unit 100 and the camera unit 200, and a processor 320 that is signally connected to the controller 310 and stores the design file 500.

With this, the processor 320 receives and analyzes the image to calculate the colored blocks defined by the dents 410 respectively, and according to the complex design blocks calculated by the design drawing file 500 and the colored areas The block performs feature matching to obtain the parameter data related to the result of the feature matching. Then, the controller 310 can control the inkjet position of the inkjet device 110 relative to the plain vacuum blister plate 400 according to the parameter data, so that the inkjet device 110 can perform the correct coloration in the corresponding coloring block. Inkjet job.

In the process of analyzing the image, the processor 320 performs the following actions to calculate the colored blocks:

First, since the plain vacuum blister plate 400 easily reflects the light from the lighting device 220 and causes the image to be overexposed, it is necessary to perform exposure compensation on the image. At the same time, the processor 320 analyzes the image to obtain the light reflection intensity of the plain vacuum blister plate 400, so that the processor 320 can control the lighting of the lighting device 220 through the controller according to the reflection intensity. The intensity of the image features of the dents 410 in the image. In this way, the edges of the dents 410 in the image can be made obvious, and then the image can be gray-scale converted, and an optimized dent edge can be obtained by adjusting a threshold to clearly define the boundaries of the colored blocks. . Then, Wiener deconvolution is used to strengthen the edges of the dents 410 in the grayscale image, and a Canny detector is used to search for the enhanced dent edges. It is worth mentioning that the lead angle and depth of the dents 410 also affect the lighting intensity. The smaller the lead angle and the deeper the depth, the easier it is to identify the dents 410 in the image, which can reduce the lighting. Strength; otherwise, the more difficult it is to discern. Generally speaking, the lead angle of each dent 410 should be no more than 0.5 mm, and the depth should be no less than 1.7 mm, so that the dents 410 can clearly appear in the image.

On the other hand, the processor 320 performs feature matching with the colored blocks based on the complex design blocks calculated by the design drawing file 500 to calculate the rotations of the design blocks corresponding to the colored blocks, respectively. The translation matrix, and the element values in the rotation translation matrices constitute the parameter data. When the inkjet device 110 receives the parameter data and needs to perform inkjet operation on one of the colored blocks, it can find the corresponding rotation translation matrix from the design block corresponding to the colored block and the parameter data, and then Move to the corresponding colored area for inkjet operation.

It is worth mentioning that in this embodiment, the number of the cameras 210 is one, but it is not limited thereto, and can be more than two, so that the processor 320 receives the images captured by the cameras 210 respectively. 3D reconstruction can be performed based on the images to further obtain the three-dimensional spatial coordinates of the dents 410 and identify the uneven structure of the colored blocks. In this way, the parameter data can be introduced into the inkjet path planning, so that the inkjet device 110 can be more efficiently moved to the corresponding colored block for inkjet operation, and the identified uneven structure can also be used as an image feature. To assist the processor 320 to calculate the parameter data.

In addition, the processor 320 also provides the resolution of the image for the user's reference during the calculation of the colored blocks, so that the user or the software running in the processor 320 can further adjust the image. The camera 210 captures the resolution of the image to obtain an optimized operation result. For example, the user can adjust the lens focal length of the camera 210 by means of optical zoom, or use the software to manually or automatically perform digital zoom to make the dent feature in the image more prominent and help improve the The processor 320 calculates the accuracy of the parameter data.

On the other hand, the servo device 230 is controlled by the controller 310, and can drive the camera 210 to move back and forth in the first direction D1. Not only can the image capture group expand the range of the captured image, Covers multiple plain vacuum blister boards 400, so that the processor 320 can perform operations on the same plain vacuum blister boards 400 at the same time, so as to shorten the overall calculation time, and by moving the camera 210, it can also effectively Reduce the capture dead angle of the image, improve the image resolution of the three-dimensional side of each plain vacuum blister board 400, and further improve the calculation accuracy of the processor 320.

In summary, the inkjet device with automatic alignment function of the present invention performs alignment through machine vision, which enables the inkjet device 110 to automatically and correctly perform inkjet operation on the corresponding colored block without It is necessary to manually discharge the plain vacuum blister sheet 400 to be ink-jetted, so that production efficiency and processing flexibility can be improved, and human resources can be reduced. Therefore, the purpose of cost invention can be achieved.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, that is, any simple equivalent changes and modifications made in accordance with the scope of the patent application and the content of the patent specification of the present invention are still It is within the scope of the invention patent.

100‧‧‧machine unit

110‧‧‧ inkjet device

120‧‧‧ Conveying device

130‧‧‧ Bracket

200‧‧‧ camera unit

210‧‧‧Camera

220‧‧‧lighting device

230‧‧‧Servo

300‧‧‧ processing unit

310‧‧‧ Controller

320‧‧‧ processor

400‧‧‧ Plain Vacuum Blister Board

410‧‧‧Dent

500‧‧‧ Design Files

D1‧‧‧ first direction

Other features and effects of the present invention will be clearly presented in the embodiment with reference to the drawings, in which: FIG. 1 is a schematic diagram of an embodiment of an inkjet device with automatic alignment function of the present invention; FIG. 2 is a part A front view illustrating a machine unit in this embodiment; FIG. 3 is a partially enlarged perspective view of FIG. 2 showing a camera unit in the machine unit; FIG. 4 is a partially enlarged perspective view of FIG. 3 from different perspectives And FIG. 5 is a schematic diagram illustrating a plain vacuum blister board having a plurality of dents used in this embodiment.

Claims (10)

An inkjet registration system is suitable for obtaining a parameter data related to an inkjet position from a plain vacuum blister board having a plurality of dents. The inkjet registration system includes: a camera unit for A color vacuum blister board to light and capture at least one image; and a processing unit for receiving and analyzing the image to calculate a plurality of colored blocks respectively defined by the dents, and the processing unit is based on A plurality of design blocks calculated by a design drawing file are subjected to feature matching with the colored blocks to obtain the parameter data related to the result of the feature matching. During analysis of the image, the processing unit detects the plain vacuum The light-reflecting intensity of the blister board is used to adjust the lighting intensity of the camera unit according to the reflection intensity. The inkjet registration system according to claim 1, wherein the processing unit signal is connected to the camera unit, and the processing unit synchronously adjusts the vacuum suction of the plain color by the camera unit during the calculation of the colored blocks. The light intensity of the plastic plate to optimize the calculation results. The inkjet registration system according to claim 2, wherein the lighting intensity of the plain vacuum blister board by the camera unit is related to the lead angle and depth of the dents. The inkjet registration system according to claim 3, wherein the camera unit includes at least one camera and a servo device provided for the camera, and the servo device is controlled by the controller to drive the camera along a first direction mobile. The inkjet registration system according to claim 1, wherein the processing unit performs the following operations to calculate the colored blocks: performing exposure compensation on the image to make the edges of the dents in the image obvious, and The image is gray-scale converted, and an optimized dent edge is obtained by adjusting a threshold to define the colored blocks. The inkjet registration system according to claim 1, further comprising a machine unit including an inkjet device which is signally connected to the processing unit, and the inkjet device receives the parameter data from the processing unit. And the inkjet position of the plain vacuum blister board is adjusted according to the parameter data, so that the inkjet is performed in the colored blocks corresponding to the design blocks. An inkjet device with automatic registration function is suitable for capturing and analyzing the shape characteristics of at least one plain vacuum blister board with a plurality of dents and a design drawing file to obtain a parameter related to the inkjet position Information, the inkjet device includes: a machine unit including an inkjet device, a conveying device for conveying the plain vacuum blister sheet to the inkjet device, and a support provided above the conveying device A camera unit, which is arranged on the bracket and includes at least one camera and a lighting device, the camera captures at least one image toward a plain vacuum blister on the conveying device, and the lighting device faces the plain A vacuum blister board; and a processing unit, including a controller that is signally connected to the machine unit and the camera unit, and a processor that is signally connected to the controller and stores the design drawing file, the processing The receiver receives and analyzes the image to calculate the colored blocks defined by the dimples respectively, and performs feature matching with the colored blocks based on the complex design blocks calculated by the design drawing file. To obtain the parameter data related to the result of feature matching, the controller controls the inkjet position of the inkjet device relative to the plain vacuum blister board according to the parameter data. During the analysis of the image, the processor detects Measure the light reflection intensity of the plain vacuum blister board to adjust the light intensity of the light device according to the reflection intensity. The inkjet device with automatic alignment function according to claim 7, wherein the camera unit includes a plurality of cameras, and the processor receives images captured by the cameras and performs three-dimensional reconstruction on the images. The inkjet device with automatic registration function according to claim 7, wherein the camera unit further includes a servo device provided on the bracket and provided for the camera, and the servo device is controlled by the controller to drive the camera Move in a first direction. The inkjet device with automatic registration function according to claim 9, wherein the lighting device is fixedly disposed on the bracket and controlled by the controller to control the intensity of the lighting so that the dents are in the image The image feature intensity increases.