A sole profile scanning system based on a point laser sensor

Abstract

This invention provides a shoe sole contour scanning system based on a point laser sensor, relating to the field of shoe manufacturing technology. It includes a conveying mechanism, a point laser sensor, and a control unit. The control unit performs the following steps: acquiring and judging real-time height difference data based on the point laser sensor in its initial position; when the height difference data is determined to be greater than a first preset value, controlling the point laser sensor to reciprocate along a second direction; during the reciprocating motion of the point laser sensor, when the height difference is determined to be greater than a second preset value, the point laser sensor continues to move a set distance and then reverses direction; after detecting that the height difference data remains stable, the point laser returns to its initial position; the height difference data is judged, valid data is filtered, and output. This achieves efficient scanning and data processing, effectively reduces motion blur, filters valid data, and improves detection accuracy and stability.

Description

Technical Field

[0001] This invention relates to the field of shoemaking technology, and more specifically, to a shoe sole contour scanning system based on a point laser sensor. Background Technology

[0002] In the footwear industry, rapid and accurate online inspection of shoe sole contour dimensions is a crucial step in ensuring product quality. Currently, most automated inspection solutions in this field employ 3D line laser scanning technology. While this technology can achieve large-area surface scanning, it has significant drawbacks: First, 3D line laser sensors and their associated computing units are expensive, resulting in high overall equipment costs, which is a heavy burden, especially for small and medium-sized production enterprises. Second, line laser solutions are prone to motion blur in high-speed conveyor belt environments, requiring large amounts of data processing and placing extremely high demands on the real-time performance of the PC system, which may introduce uncertainties in terms of accuracy and stability. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a method and apparatus for scanning the contour of a shoe sole based on a point laser sensor, so as to solve the above problems.

[0004] The present invention adopts the following solution:

[0005] This application provides a shoe sole contour scanning system based on a point laser sensor, including a conveying mechanism for transporting a shoe sole model along a first direction in a predetermined posture; it also includes a point laser sensor and a control unit; the control unit is used to perform the following steps:

[0006] Real-time height difference data is collected and determined based on a point laser sensor at the initial position; the initial position is the center position of the width of the shoe sole model along the conveying direction.

[0007] When the height difference data is determined to be greater than the first set value, the point laser sensor is controlled to reciprocate along a second direction perpendicular to the first direction;

[0008] During the reciprocating motion of the point laser sensor, when the height difference is determined to be greater than the second set value, the point laser sensor continues to move a set distance and then moves in the opposite direction.

[0009] After detecting that the height difference data remains stable, the point laser returns to its initial position;

[0010] The system analyzes and filters the height difference data, and finally outputs data that matches the shoe sole profile.

[0011] Furthermore, it includes two point laser sensors, and the control unit controls the two point laser sensors to move along their respective scanning paths to perform partitioned scanning of the contour areas on both sides of the sole.

[0012] Furthermore, it also includes two linear motion modules electrically connected to the control unit; the two linear motion modules each control one of the point laser sensors to perform reciprocating motion.

[0013] Furthermore, the valid data is the value near the maximum height difference data.

[0014] Furthermore, it also includes a guiding and aligning mechanism, which is disposed on the conveying path of the conveying mechanism, for guiding, centering and correcting the posture of the shoe sole model.

[0015] Furthermore, the guiding and aligning mechanism includes two guide plates arranged in a funnel shape.

[0016] Furthermore, the laser emission direction of the point laser sensor is oriented towards the conveying plane of the conveying mechanism.

[0017] Furthermore, the control unit is an Arduino-based PCB control unit.

[0018] Furthermore, the first set value and the second set value are less than or equal to the minimum height difference between the sole model and the surface of the transmission mechanism.

[0019] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0020] This application provides a shoe sole contour scanning system based on a point laser sensor, which includes a conveying mechanism, a point laser sensor, and a control unit. Through intelligent motion control of the point laser sensor and control unit, efficient scanning and data processing are achieved, effectively reducing motion blur, filtering valid data, improving detection accuracy and stability, and reducing data processing burden. This device is suitable for the detection needs of different shoe types, and its simple structure makes it easy to disassemble and maintain, effectively reducing subsequent maintenance costs. Compared with expensive 3D line laser systems, this invention achieves a balance between accuracy, efficiency, and cost. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0022] Figure 1This is a schematic diagram of a shoe sole contour scanning system based on a point laser sensor according to an embodiment of the present invention.

[0023] Figure 2 This is a top view of the sole model of a shoe sole contour scanning system based on a point laser sensor according to an embodiment of the present invention, when the sole model is in the starting position.

[0024] Figure 3 This is a flowchart of a detection method for a shoe sole contour scanning system based on a point laser sensor, according to an embodiment of the present invention.

[0025] Figure 4 This is a top view of the sole model of a shoe sole contour scanning system based on a point laser sensor according to an embodiment of the present invention, when the sole model is located in the scanning area of ​​the first point laser sensor.

[0026] Figure 5 This is a top view of the sole model of a shoe sole contour scanning system based on a point laser sensor according to an embodiment of the present invention, when the sole model is located in the scanning area of ​​the second point laser sensor.

[0027] Figure 6 This is a data image obtained from a single point laser scan of a shoe sole contour scanning system based on a point laser sensor, according to an embodiment of the present invention.

[0028] Icons: 1. Guide and alignment mechanism; 2. Shoe sole model; 3. Linear motion module; 4. Point laser sensor; 5. Conveyor belt. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example

[0031] Combination Figures 1 to 6 As shown, this embodiment provides a shoe sole contour scanning system based on a point laser sensor, including a conveying mechanism to transport the shoe sole model 2 in a predetermined posture along a first direction; it also includes a point laser sensor 4 and a control unit;

[0032] Specifically, in this embodiment, the conveying mechanism uses a conveyor belt for conveying; a guide and alignment mechanism 1 is provided on its conveying path. The guide and alignment mechanism 1 includes two guide plates arranged in a funnel shape, which are used to guide, center and correct the posture of the shoe sole model 2.

[0033] In this embodiment, two point laser sensors 4 are independently configured and mounted above the conveyor belt via a linear motion module 3, and positioned downstream of the guide and alignment mechanism 1. The control unit can control the linear motion module 3 to drive the point laser sensors 4 to move along their respective scanning paths to perform partitioned scanning of the contour areas on both sides of the shoe sole.

[0034] like Figure 3 As shown, the control unit is an Arduino-based PCB control unit used to perform the following steps:

[0035] S1. Real-time height difference data is collected and determined based on the point laser sensor 4 at the initial position; wherein, the initial position is set as the center position of the width of the sole model 2 along the conveying direction; the height difference data refers to the height difference between the upper surface of the sole model 2 and the upper surface of the conveyor belt;

[0036] S2. The control unit makes a judgment on the collected height difference data;

[0037] When the height difference data is determined to be greater than the first set value a, the point laser sensor 4 is controlled to reciprocate along a second direction perpendicular to the first direction.

[0038] Wherein, the first set value a is less than or equal to the minimum height difference between the sole model 2 and the upper surface of the conveyor belt; for example, in this embodiment, the first set value a can be set to 20mm; that is, when the height difference data is greater than the first set value a, the sole model 2 enters the scanning area of ​​the point laser sensor 4;

[0039] During the reciprocating motion of the point laser sensor 4, when the height difference data is determined to be greater than the second set value b, the point laser sensor continues to move a set distance and then moves in the opposite direction.

[0040] Wherein, the second set value b is less than or equal to the minimum height difference between the sole model 2 and the upper surface of the conveyor belt; for example, in this embodiment, the second set value b can be set to 50mm; Figure 4 and Figure 5As shown, the height difference between the outer edge of the upper surface of the normal shoe sole and the upper surface of the conveyor belt is usually the largest. When it is determined that the height difference is greater than the second set value, the point laser sensor continues to move a set moving distance c and then moves in the opposite direction. For example, in this embodiment, the moving distance c is set to 30mm. In this way, the laser sensor can follow the outer edge contour of the shoe sole model 2 to perform reciprocating scanning.

[0041] After the height difference data is detected to remain stable, meaning that the sole model 2 has left the scanning area, the point laser returns to its initial position for the next round of scanning.

[0042] S3. Judge and filter the collected height difference data, and finally output the data that conforms to the outline of the shoe sole.

[0043] Since the height difference between the outer edge of the sole and the upper surface of the conveyor belt is usually the greatest, the effective data refers to values ​​near the maximum height difference. After filtering, the contour and height information of sole model 2 can be output. Figure 6 As shown, the upper right line shows the height profile of one side of the sole model 2; the lower right line shows the edge profile of one side of the sole model 2 in the horizontal direction; the upper left line shows the profile of a certain section of one side of the sole model 2; and the lower left line shows the change in height difference data, which is used to determine whether the control point laser sensor 4 moves in the opposite direction.

[0044] The above-described shoe sole contour scanning system based on a point laser sensor achieves efficient scanning and data processing through intelligent motion control of the point laser sensor 4 and the control unit. This effectively reduces motion blur, filters valid data, improves detection accuracy and stability, and reduces the data processing burden. The device is suitable for the detection needs of different shoe types, and its simple structure makes it easy to disassemble and maintain, effectively reducing subsequent maintenance costs. Compared with expensive 3D line laser systems, this invention achieves a balance between accuracy, efficiency, and cost.

[0045] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions that fall within the scope of the present invention are within the scope of protection of the present invention.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

Claims

1. A sole profile scanning system based on a point laser sensor, comprising a conveying mechanism for conveying a sole model (2) in a predetermined posture in a first direction, characterized in that, It also includes a point laser sensor (4) and a control unit; the control unit is used to perform the following steps: The real-time height difference data is collected and determined based on the point laser sensor (4) at the initial position; the initial position is the center position of the width of the shoe sole model (2) along the conveying direction; When the height difference data is determined to be greater than the first set value, the point laser sensor (4) is controlled to reciprocate along a second direction perpendicular to the first direction; During the reciprocating motion of the point laser sensor (4), when the height difference is determined to be greater than the second set value, the point laser sensor (4) continues to move a set distance and then moves in the opposite direction. After detecting that the height difference data remains stable, the point laser sensor (4) returns to its initial position; The height difference data is judged and the valid data is filtered. Finally, the data that conforms to the shoe sole outline is output. The valid data is the maximum height difference data obtained by scanning the shoe sole outline, and the height difference data whose deviation value from the maximum height difference data does not exceed a preset threshold.

2. The sole profile scanning system based on a point laser sensor according to claim 1, wherein, It includes two point laser sensors (4), and the control unit controls the two point laser sensors (4) to move along their respective scanning paths to perform partitioned scanning of the contour areas on both sides of the sole.

3. The sole profile scanning system based on a point laser sensor according to claim 2, wherein, It also includes two linear motion modules (3) electrically connected to the control unit; the two linear motion modules (3) respectively control one of the point laser sensors (4) to perform reciprocating motion.

4. The shoe sole contour scanning system based on a point laser sensor according to claim 1, characterized in that, It also includes a guide and alignment mechanism (1), which is set on the conveying path of the conveying mechanism for guiding, centering and correcting the posture of the shoe sole model (2).

5. The shoe sole contour scanning system based on a point laser sensor according to claim 4, characterized in that, The guide and alignment mechanism (1) includes two guide plates arranged in a funnel shape.

6. The shoe sole contour scanning system based on a point laser sensor according to claim 1, characterized in that, The laser emission direction of the point laser sensor (4) is toward the conveying plane of the conveying mechanism.

7. The shoe sole contour scanning system based on a point laser sensor according to claim 1, characterized in that, The control unit is an Arduino-based PCB control unit.

8. The shoe sole contour scanning system based on a point laser sensor according to claim 1, characterized in that, The first set value and the second set value are less than or equal to the minimum height difference between the sole model (2) and the surface of the conveying mechanism.

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