Device and method for measuring thickness of leather on line
Through the online measurement of leather thickness device, the computer-controlled transmission mechanism and line array camera are used, combined with the displacement sensor, the problems of low manual measurement efficiency and inaccurate positioning are solved, and efficient and accurate leather thickness detection and abnormal positioning are achieved. Improved production efficiency.
Patent Information
- Application Number
- CN202411470298.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2024-12-20
AI Technical Summary
The existing leather thickness measurement methods rely on manual operation, are inefficient, have strong subjectivity in the measurement results, and are difficult to ensure accuracy and precise positioning, especially when the leather area is large, it is easy to miss or miscalculate.
A device for measuring the thickness of leather online is designed, using a computer-controlled transmission mechanism, a linear array camera and a displacement sensor. The leather is uniformly moved through the transmission mechanism, and the motion signal is transmitted using the pressure wheel and converted into an electrical signal, combined with the linear array camera. Grab the image for analysis, generate a thickness waveform map, and display the thickness abnormality position in real time.
It improves the accuracy and efficiency of leather thickness measurement, reduces labor costs, and can accurately locate areas with abnormal thicknesses. It is suitable for a variety of leather thickness detection, significantly improving production efficiency.
Smart Images
Figure CN119164299A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of detection equipment, and in particular relates to a device and method for online measuring leather thickness. Background Art
[0002] Leather is the most basic raw material for leather manufacturing industries such as shoes, sofas, bags, and car seats. In recent years, the number of leather and its manufacturing companies has increased, and the output of essential commodities such as shoes, bags, car seats, and sofas has gradually increased. Leather thickness detection has gradually become an important part of the leather processing production chain. Generally speaking, leather materials have uneven thickness. In this case, it is very difficult to detect in the leather products industry and it is difficult to identify with the naked eye.
[0003] At present, the measurement of leather thickness is mainly done manually. Manual measurement mainly involves operators using a thickness gauge or a thickness ruler to measure the points on the leather that need to be tested. Manual and visual measurement is extremely inefficient, time-consuming and labor-intensive, and easily causes eye fatigue. Especially when the leather area is large, it is difficult to ensure that each point to be measured on the entire piece of leather can be measured accurately. In addition, each person has a different degree of clamping tightness when measuring the leather, and the measurement results need to be judged by the naked eye, resulting in a strong subjectivity of the test results and no unified standard. In addition, even if the results of manual measurement are quite accurate, it is inevitable that the operator cannot accurately locate the area with abnormal thickness on the leather; in addition, according to the current traditional pressure wheel online thickness measurement equipment, it is impossible to achieve close cooperation between the linear array camera and the pressure wheel, and redundant measurement cannot be performed. For example, in the measurement area of the spine and the measurement area of the two ribs, when the position of the artificial epithelium is deviated, the measurement result will be inaccurate. In addition to avoiding this problem to a large extent, the device can also accurately locate the position of abnormal thickness on the leather through a waveform diagram generated in real time by a computer, greatly improving work and production efficiency. Summary of the invention
[0004] This project team has developed a device and method for online measurement of leather thickness. The purpose of the invention is to solve the problems mentioned in the above background technology, such as inaccurate leather thickness measurement, inaccurate thickness area positioning, low efficiency, and strong subjectivity of detection results, which lead to missed measurements, false measurements, etc.
[0005] In order to achieve the above object, the present invention is implemented by the following technical solutions: On one hand, the present invention provides an online leather thickness measuring device, comprising a workbench, a transmission and conveying mechanism, a scanning mechanism, a thickness measuring mechanism, a double-bar scanning mechanism bracket, a double-bar thickness measuring mechanism bracket and a computer; the display screen of the computer is installed above the workbench, and the host is installed below the workbench; a transmission and conveying mechanism controlled by a computer is arranged on the upper part of the workbench, a double-bar scanning mechanism bracket consistent with the width of the workbench is arranged in the middle position of the workbench, an LED light source controlled by a computer is arranged on the front bar of the double-bar scanning mechanism bracket, and a scanning mechanism controlled by a computer is arranged on the rear bar of the double-bar scanning mechanism bracket; a double-bar thickness measuring mechanism bracket is arranged in front of the double-bar scanning mechanism bracket, and a thickness measuring mechanism controlled by a computer is arranged on the double-bar thickness measuring mechanism bracket.
[0006] Preferably, the transmission and conveying mechanism is installed on the workbench and is controlled by a computer, and the computer adjusts the speed and direction of the transmission and conveying mechanism through an AC frequency converter.
[0007] Preferably, the display screen of the computer is installed above the workbench through a horizontal bar support bracket, and the host is installed below the workbench.
[0008] Preferably, the scanning mechanism is a row of linear array cameras mounted on the rear bar of a double-bar scanning mechanism bracket and controlled by a computer.
[0009] Preferably, the thickness measuring mechanism comprises a displacement sensor controlled by a computer, a pressure wheel, and a connecting rod mechanism connecting the pressure wheel and the displacement sensor; the connecting rod mechanism is installed on a double-bar thickness measuring mechanism bracket.
[0010] Another aspect of the present invention provides a method for measuring leather thickness online, comprising the following steps: 1) Lay the whole piece of leather flat on the transmission conveyor mechanism of the workbench; 2) Control the operation of the transmission motor in the transmission conveying mechanism through a computer; 3) The leather passes evenly under the pressing wheel along with the transmission conveyor mechanism; 4) The motion signal is transmitted to the displacement sensor through the pressure wheel, and the displacement sensor converts the motion signal into an electrical signal. Finally, the waveform of the measured thickness is obtained through the computer; 5) After the leather passes through the pressing wheel, it takes a certain period of time to reach the bottom of the linear array camera; 6) The linear array camera captures the image of the relevant leather and performs computational analysis; 7) After acquiring the complete leather image, the computer will send a stop signal to the transmission motor to control the transmission mechanism to stop moving; 8) Finally, the calculated thickness waveform of the entire leather and the location of abnormal leather thickness will be fully output and displayed on the monitor; 9) At this point, the thickness measurement of a piece of leather has been completed. Repeat the above steps for subsequent testing.
[0011] Beneficial effects of the present invention: 1. In the field of leather thickness measurement, this device adds related control systems such as linear array cameras and displacement sensors, which makes up for the problems of inaccurate leather measurement and error in positioning of related areas in the background technology.
[0012] 2. This equipment is controlled by computer in real time to output thickness waveform, so the operator can observe the relevant areas with abnormal thickness in time. It has a very high efficiency.
[0013] 3. This equipment has strong versatility and can be applied to the thickness measurement and detection of most types of leather on the market with high detection efficiency; it has a high degree of automation, which can greatly reduce labor costs and time costs and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the present disclosure, the following briefly introduces the drawings required to be used in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not limitations on the actual size of the product involved in the embodiments of the present disclosure, the actual process of the method, the actual timing of the signal, etc.
[0015] Figure 1 It is a schematic diagram of the general assembly of the present invention; Figure 2 This is the innovative principle diagram of the present invention (the leather is located on the left); Figure 3 This is the innovative principle diagram of the present invention (leather rotation angle tilt); In the figure: 1. workbench; 2. transmission and conveying mechanism; 3. pressure wheel; 4. displacement sensor; 5. linear array camera; 6. double-bar scanning mechanism bracket; 7. double-bar thickness measuring mechanism bracket; 8. computer, 9. LED light source. DETAILED DESCRIPTION
[0016] In order to enable those skilled in the art to better understand the technical solutions in this application, 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 described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.
[0017] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.
[0018] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0019] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may 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. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.
[0021] The present invention is described in further detail below by way of examples.
[0022] Embodiment 1: This embodiment provides a device for measuring the thickness of leather online, comprising a workbench 1, a transmission and conveying mechanism 2, a scanning mechanism, a thickness measuring mechanism, a double-bar scanning mechanism bracket 6, a double-bar thickness measuring mechanism bracket 7 and a computer 8; the display screen of the computer 8 is installed above the workbench 1, and the host is installed below the workbench 1; a transmission and conveying mechanism 2 controlled by the computer 8 is arranged on the upper part of the workbench 1, a double-bar scanning mechanism bracket 6 with the same width as the workbench 1 is arranged in the middle position of the workbench 1, an LED light source 9 controlled by the computer 8 is arranged on the front bar of the double-bar scanning mechanism bracket 6, and a scanning mechanism controlled by the computer 8 is arranged on the rear bar of the double-bar scanning mechanism bracket 6; a double-bar thickness measuring mechanism bracket 7 is arranged in front of the double-bar scanning mechanism bracket 6, and a thickness measuring mechanism controlled by the computer 8 is arranged on the double-bar thickness measuring mechanism bracket 7.
[0023] In this embodiment, the transmission and conveying mechanism 2 is installed on the workbench 1 and is controlled by a computer 8. The computer 8 adjusts the speed and direction of the transmission and conveying mechanism 2 through an AC inverter.
[0024] In this embodiment, the display screen of the computer 8 is installed above the workbench 1 through a horizontal bar support bracket, and the host is installed below the workbench 1.
[0025] In this embodiment, the scanning mechanism is a row of linear array cameras 5 installed on the rear bar of a double-bar scanning mechanism bracket 6 and controlled by a computer 8 .
[0026] In this embodiment, the thickness measuring mechanism includes a displacement sensor 4 controlled by a computer 8, a pressure wheel 3, and a connecting rod mechanism connecting the pressure wheel 3 and the displacement sensor 4; the connecting rod mechanism is installed on a double-bar thickness measuring mechanism bracket 7.
[0027] Embodiment 2, a method for measuring leather thickness online, comprising the following steps: 1) Lay the whole piece of leather flat on the transmission conveyor mechanism of the workbench; 2) Control the operation of the transmission motor in the transmission conveying mechanism through a computer; 3) The leather passes evenly under the pressing wheel along with the transmission conveyor mechanism; 4) The motion signal is transmitted to the displacement sensor through the pressure wheel, and the displacement sensor converts the motion signal into an electrical signal. Finally, the waveform of the measured thickness is obtained through the computer; 5) After the leather passes through the pressing wheel, it takes a certain period of time to reach the bottom of the linear array camera; 6) The linear array camera captures the image of the relevant leather and performs computational analysis; 7) After acquiring the complete leather image, the computer will send a stop signal to the transmission motor to control the transmission mechanism to stop moving; 8) Finally, the calculated thickness waveform of the entire leather and the location of abnormal leather thickness will be fully output and displayed on the monitor; 9) At this point, the thickness measurement of a piece of leather has been completed. Repeat the above steps for subsequent testing.
[0028] The technical solution of the present invention is to manually lay the leather on the conveyor belt, wait for the leather to move with the transmission mechanism, and then use a linear array camera to take pictures of the surface of the leather. Then the leather passes under the pressure wheel, and the pressure wheel transmits the motion signal to the displacement sensor, which then converts the motion signal into an electrical signal and transmits it to the computer. Relatively speaking, this solution greatly reduces labor costs, enables the thickness of the leather to be detected in a timely manner, and can be accurately positioned, which greatly improves the overall production efficiency.
[0029] Combination Figure 2 Figure 3 Explain the key points and innovations of this patent. Since the distance between the linear array camera and the displacement sensor of this device is certain, the time for the leather to pass through the linear array camera to the pressing wheel is certain, set as tn; when the leather reaches the pressing wheel, the time is t0+tn, and so on; in this way, the thickness of the leather can be accurately located through a certain time difference. In this device, the back area and the two rib areas of the leather can be accurately measured. The diagram of this device only takes the back area as an example. Artificial epithelium will inevitably cause the leather to be biased to the left or right. Adding a set of displacement sensors to the adjacent positions on both sides of the middle back area can accurately measure the thickness of the area. According to actual production needs, one set can be added to each of the two rib areas. Combining the leather image scanned by the linear array camera and the thickness waveform generated by the output signal of the displacement sensor, the thickness of the relevant area can be clearly seen on the computer monitor. Figure 2 The cowhide is placed to the left, so we only take L5 from the three sets of data of L4, L2, and L5, because L5 is closer to the mid-back line. Figure 3 The angle has rotated, so the thickness of the upper half of the skin is measured with L4, the middle with L2, and the lower half with L5.
[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
[0031] 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 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 falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claim involved.
[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A device for measuring leather thickness online, characterized in that: The invention comprises a workbench (1), a transmission and conveying mechanism (2), a scanning mechanism, a thickness measuring mechanism, a double-bar scanning mechanism bracket (6), a double-bar thickness measuring mechanism bracket (7) and a computer (8); a transmission and conveying mechanism (2) controlled by a computer (8) is arranged on the upper part of the workbench (1); a double-bar scanning mechanism bracket (6) having the same width as the workbench (1) is arranged in the middle of the workbench (1); an LED light source (9) controlled by the computer (8) is arranged on the front bar of the double-bar scanning mechanism bracket (6); and a scanning mechanism controlled by the computer (8) is arranged on the rear bar of the double-bar scanning mechanism bracket (6); a double-bar thickness measuring mechanism bracket (7) is arranged in front of the double-bar scanning mechanism bracket (6); and a thickness measuring mechanism controlled by the computer (8) is arranged on the double-bar thickness measuring mechanism bracket (7).
2. The device for measuring leather thickness online according to claim 1, characterized in that: The transmission and conveying mechanism (2) is installed on the workbench (1) and is controlled by a computer (8); the computer (8) adjusts the speed and direction of the transmission and conveying mechanism (2) through an AC frequency converter.
3. The device for measuring leather thickness online according to claim 1, characterized in that: The display screen of the computer (8) is installed above the workbench (1) via a horizontal bar support bracket, and the host computer is installed below the workbench (1).
4. The device for measuring leather thickness online according to claim 1, characterized in that: The scanning mechanism is a row of linear array cameras (5) mounted on the rear bar of a double-bar scanning mechanism bracket (6) and controlled by a computer (8).
5. The device for measuring leather thickness online according to claim 1, characterized in that: The thickness measuring mechanism comprises a displacement sensor (4) controlled by a computer (8), a pressure wheel (3), and a connecting rod mechanism connecting the pressure wheel (3) and the displacement sensor (4); the connecting rod mechanism is mounted on a double-bar thickness measuring mechanism bracket (7).
6. The device according to any one of claims 1 to 5 provides a method for measuring leather thickness online, characterized in that: The following steps are involved: 1) Lay the whole piece of leather flat on the transmission conveyor mechanism of the workbench; 2) Control the operation of the transmission motor in the transmission conveying mechanism through a computer; 3) The leather passes evenly under the pressing wheel along with the transmission conveyor mechanism; 4) The motion signal is transmitted to the displacement sensor through the pressure wheel, and the displacement sensor converts the motion signal into an electrical signal. Finally, the waveform of the measured thickness is obtained through the computer; 5) After the leather passes through the pressing wheel, it takes a certain period of time to reach the bottom of the linear array camera; 6) The linear array camera captures the image of the relevant leather and performs computational analysis; 7) After acquiring the complete leather image, the computer will send a stop signal to the transmission motor to control the transmission mechanism to stop moving; 8) Finally, the calculated thickness waveform of the entire leather and the location of abnormal leather thickness will be fully output and displayed on the monitor; 9) At this point, the thickness measurement of a piece of leather has been completed. Repeat the above steps for subsequent testing.