Leather size measuring equipment

Abstract

The utility model provides leather size measuring equipment, which belongs to the field of leather equipment and comprises a transmission machine table, a visual portal frame and a 3D visual module. A visual portal frame and a 3D visual module are sequentially arranged above the transmission machine table, a linear scanning camera is fixedly installed below the middle position of the top of the visual portal frame, and a linear light source is installed on one side of the lower portion of the visual portal frame; the 3D vision module comprises a support, a suspension is arranged at the top of the support, a spectrum projector is installed in the middle of the suspension, and 3D cameras are installed on the two sides of the suspension respectively. The accurate size of the protruding part can be obtained through calculation of the 3D camera, and the measuring scale error caused by factors such as uneven leather laying is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of leather equipment, and in particular to a leather size measuring device. Background Art

[0002] Against the backdrop of increasing automation in industrial production, machine vision technology, as a key component of automated equipment, has become a crucial guiding technology for industry development. Line scanning technology is currently widely used in surface inspection, including defect detection, dimensional measurement, and distance measurement. In the dimensional measurement field, leather measurement, a common application, has been increasingly adopted by the market. The precision and timeliness of vision systems have greatly improved the efficiency and accuracy of measuring scales, bringing convenience to enterprises.

[0003] Currently, the commonly used visual measurement technology for leather measurement relies on stitching and calculating 2D images generated by line scan cameras. However, in the actual measurement process, the leather's surface flatness is inevitably inconsistent, resulting in unevenness, due to factors such as leather processing and manual laying. Existing line scan technology cannot identify raised areas, resulting in measurement errors caused by leather raised areas in actual production. To address this measurement error caused by leather raised areas, 3D camera imaging is now being used to detect the height and width of the leather, thereby measuring the size of the raised areas, improving overall measurement accuracy and making leather measurement more automated and standardized. Utility Model Content

[0004] This utility model provides a leather size measurement device. The purpose of this patent is to address the issue of measuring errors caused by leather bumps mentioned in the background art. This device combines machine vision with 3D imaging to provide a leather size measurement device.

[0005] The technical solution of the present invention is as follows: a leather size measuring device, including a transmission machine, a vision gantry, and a 3D vision module; the vision gantry and the 3D vision module are arranged in sequence above the transmission machine, a line scan camera is fixedly installed below the middle position of the top of the vision gantry, and a linear light source is installed on one side of the lower part of the vision gantry; the 3D vision module includes a bracket, a suspension is arranged on the top of the bracket, a spectrum projector is installed in the middle position of the suspension, and 3D cameras are installed on both sides of the suspension.

[0006] Preferably, the transmission machine includes four rollers at the bottom and a table cloth mounted on the rollers. The rollers are driven by a servo motor, and the rollers drive the table cloth to move.

[0007] Preferably, the linear light source is fixedly mounted on one side of the lower portion of the visual gantry via a light source bracket.

[0008] Preferably, the line scan camera is fixedly mounted below the top middle position of the vision gantry via a camera gimbal.

[0009] Preferably, the structure of the suspension is a regular trapezoidal structure with the bottom edge removed, a spectrum projector is installed in the middle of the upper crossbeam of the suspension, and 3D cameras are installed on the oblique beams on both sides of the suspension.

[0010] Preferably, a controller is further included, and the line scan camera, linear light source, spectrum projector, 3D camera, and servo motor are respectively controlled by the controller.

[0011] Preferably, the controller includes an industrial control host and a display.

[0012] The method primarily utilizes the imaging capabilities of line scan cameras and 3D cameras. The line scan camera generates a 2D image of the target leather. By recognizing the image's contours and calculating its coordinates, the dimensions of the leather within the 2D image are determined. Furthermore, the 3D camera is used to obtain the height and width of raised areas on the leather, calculate their dimensions, and ultimately determine the actual dimensions of the entire piece of leather.

[0013] Beneficial effects of the utility model:

[0014] 1. Accuracy: The 3D camera can calculate the exact size of the raised part, avoiding the measurement error caused by unequal laying of leather.

[0015] 2. Economical, it reduces product loss caused by measuring errors and reduces the company's loss costs.

[0016] 3. More standardized, providing a new type of equipment for leather measuring, making the leather measuring process more standardized and automated. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.

[0018] Figure 1 This is a structural diagram of the leather size measuring device provided by this invention.

[0019] Figure 2 This is a structural diagram of the 3D vision module provided by this new model.

[0020] Among them, 1-transmission machine, 2-vision gantry, 3-3D vision module, 4-roller, 5-tablecloth, 6-camera gimbal, 7-line scan camera, 8-linear light source, 9-light source bracket, 10-suspension, 11-spectral projector, 12-3D camera, 13-leather to be tested. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will provide a clear and complete description of the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0022] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0023] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0024] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0025] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0026] The present invention is described in further detail below through examples.

[0027] A leather size measuring device provided in an embodiment of the present application includes a conveyor machine 1, a vision gantry 2, and a 3D vision module 3; the vision gantry 2 and the 3D vision module 3 are arranged in sequence above the conveyor machine 1, a line scan camera 7 is fixedly installed below the middle position of the top of the vision gantry 2, and a linear light source 8 is installed on one side of the lower part of the vision gantry 2; the 3D vision module includes a bracket, a suspension 10 is provided on the top of the bracket, a spectrum projector 11 is installed in the middle position of the suspension 10, and 3D cameras 12 are respectively installed on both sides of the suspension 10.

[0028] In this embodiment, the conveyor 1 includes four rollers 4 at the bottom and a table cloth 5 mounted on the rollers 4 . The rollers 4 are driven by a servo motor, and the rollers 4 drive the table cloth 5 to move.

[0029] In this embodiment, the linear light source 8 is fixedly mounted on one side of the lower portion of the visual gantry 2 via a light source bracket.

[0030] In this embodiment, the line scan camera 7 is fixedly installed below the top middle position of the vision gantry 2 through the camera platform 6.

[0031] In this embodiment, the structure of the suspension 10 is a regular trapezoidal structure with the bottom side removed. A spectrum projector 11 is installed in the middle of the upper crossbeam of the suspension 10 , and 3D cameras 12 are installed on the oblique beams on both sides of the suspension 10 .

[0032] In this embodiment, a controller is further included, and the line scan camera 7, linear light source 8, spectrum projector 11, 3D camera 12, and servo motor are controlled by the controller respectively. The controller includes an industrial control host and a display.

[0033] The method primarily utilizes the imaging capabilities of line scan cameras and 3D cameras. The line scan camera generates a 2D image of the target leather. By recognizing the image's contours and calculating its coordinates, the dimensions of the leather within the 2D image are determined. Furthermore, the 3D camera is used to obtain the height and width of raised areas on the leather, calculate their dimensions, and ultimately determine the actual dimensions of the entire piece of leather.

[0034] Use of a leather size measuring device:

[0035] 1. First, power on the transmission machine and ensure that the servo electrode, industrial control host, 3D camera, spectrum projector, line scan camera, display and other equipment are in the power-on standby state.

[0036] 2 Place the leather to be tested as shown in the following figure: Figure 1 In the upper leather area on the left side of the conveyor shown, the servo motor is started, the table cloth is rotated, and the leather to be tested is conveyed to the bottom of the visual gantry as the table cloth rotates.

[0037] 3. When the leather reaches the bottom of the vision gantry, the line scan camera at the top detects the leather and begins capturing images. Software processing extracts the leather's outline from the image and generates contour lines. HALCON operators are used to convert the pixels within the contour into area sizes, resulting in the leather's dimensions in a 2D image.

[0038] 4 The leather continues to move to the right. When it reaches the bottom of the 3D vision module, it is projected by light from the top spectrum projector. The 3D camera then calculates the corresponding height value Y based on the changes in the spectral pattern. A height threshold range is set. When the height value exceeds the set threshold, the program determines that the leather thickness in this area is abnormal and begins recording the position information X at the corresponding height value. The program stops monitoring until the thickness falls below the set threshold. The arc length of the corresponding part is calculated using the integral formula based on the position information X and the height value Y. The actual size of the leather raised part is obtained by subtracting the horizontal length of the entire raised part from the sum of the arc lengths.

[0039] 5. Add the size of the raised part to the size of the rest of the leather to get the actual size of the whole leather. The calculated size will be displayed in the software.

[0040] 6 After completing the above steps, the leather continues to move to the lower leather area on the right side, and the measuring process of the entire leather is completed.

[0041] The above describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0042] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A leather size measuring device, characterized in that: The invention comprises a transmission machine (1), a visual gantry (2), and a 3D vision module (3); the visual gantry (2) and the 3D vision module (3) are sequentially arranged above the transmission machine (1); a line scan camera (7) is fixedly installed below the middle position of the top of the visual gantry (2); and a linear light source (8) is installed on one side of the lower part of the visual gantry (2); the 3D vision module comprises a bracket, a suspension (10) is arranged on the top of the bracket, a spectrum projector (11) is installed in the middle position of the suspension (10), and 3D cameras (12) are respectively installed on both sides of the suspension (10).

2. The leather size measuring device according to claim 1, characterized in that: The transmission machine (1) comprises four rollers (4) at the bottom and a tablecloth (5) mounted on the rollers (4); the rollers (4) are driven by a servo motor, and the rollers (4) drive the tablecloth (5) to move.

3. The leather size measuring device according to claim 1, characterized in that: The linear light source (8) is fixedly mounted on one side of the lower portion of the visual gantry (2) via a light source bracket.

4. The leather size measuring device according to claim 1, characterized in that: The line scan camera (7) is fixedly mounted below the top middle position of the visual gantry (2) via a camera platform (6).

5. The leather size measuring device according to claim 1, characterized in that: The structure of the suspension (10) is a regular trapezoidal structure with the bottom edge removed, a spectrum projector (11) is installed in the middle position of the upper crossbeam of the suspension (10), and 3D cameras (12) are respectively installed on the oblique beams on both sides of the suspension (10).

6. The leather size measuring device according to claim 1, characterized in that: It also includes a controller, and the line scan camera (7), linear light source (8), spectrum projector (11), 3D camera (12), and servo motor are respectively controlled by the controller.

7. The leather size measuring device according to claim 6, characterized in that: The controller includes an industrial control host and a display.

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