A machine vision-based industrial sewing machine needle elasticity test detection device

Abstract

The utility model discloses an industrial sewing machine needle elasticity test detection device based on machine vision, including base, longitudinal needle unit, horizontal shift clamping unit, vision unit and control unit, under the drive of longitudinal needle unit, adjust the relative distance of needle column and horizontal shift clamping unit along longitudinal y axle direction, under the drive of horizontal shift clamping unit, adjust its own rotation along horizontal x axle direction, and realize the opening and closing action between clamping piece and clamp to complete the clamping and release of needle tip, vision unit is used for gathering the image information of the detected machine needle body, control unit accurate drive each servo motor and execute longitudinal shift, horizontal shift, clamping, release etc. Action, ensure each movement unit and vision detection process cooperation. The utility model realizes full -process automation operation in ensuring the detection precision standardization, improves detection efficiency and the consistency of measurement result significantly, effectively satisfies the standardization and quantization demand under the industrialization batch detection scene.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine needle testing technology, and in particular to an industrial sewing machine needle elasticity testing device based on machine vision. Background Technology

[0002] In the high-speed sewing operations of industrial sewing machines, the needle, as the core actuator, needs to continuously and frequently rub against the fabric and sewing thread. During this process, the needle not only endures significant mechanical stress but also generates a large amount of heat due to friction, which can drastically shorten its lifespan. If the needle does not meet the elastic strength requirements stipulated by industry standards, it is highly susceptible to malfunctions such as needle breakage, skipped stitches, and thread breakage. This not only directly leads to quality problems such as disordered stitches and fabric damage in sewn products but may also threaten operational safety due to broken needles scattering, negatively impacting overall production efficiency.

[0003] In the quality inspection of sewing machine needles, existing testing methods mainly focus on basic external parameters such as needle tip type, needle length and diameter, and needle hole location. However, a specific testing method for the compressive elastic strength of the needle body is currently lacking. The effective implementation of such a method faces the following main challenges: The calibration of applied pressure is challenging: In needle elasticity testing, the needle must first be fixed to a specialized fixture, then lateral pressure is applied by the lateral translation of the fixture, and the plastic deformation of the needle is measured after release. Current mainstream manual fixtures have limitations: they can only roughly control the lateral movement stroke and cannot precisely adjust the application time and force of the lateral load, resulting in a complex pressure calibration process with significant errors, thus compromising the stability and consistency of the elasticity test conditions.

[0004] Insufficient accuracy in measuring minute plastic deformation of needle body: When the needle tip is subjected to a specific lateral pressure load for a certain period of time, the needle body will produce micron-level plastic deformation after rebound. This minute deformation is much smaller than the ability of the naked eye to distinguish, and the accuracy of conventional distance measuring tools such as calipers and micrometers cannot meet the detection requirements. It is necessary to rely on a high-precision vision inspection system to capture the deformation, which not only raises the technical threshold of the detection equipment, but also puts forward higher requirements for the automation of the measurement process. Summary of the Invention

[0005] The purpose of this invention is to solve the problems mentioned in the background art and provide an industrial sewing machine needle elasticity testing device based on machine vision.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A machine vision-based industrial sewing machine needle elasticity testing device includes a base, a longitudinally moving pin unit, a transversely moving clamping unit, a vision unit, and a control unit mounted on the base. The base is a metal plate with several mounting screw holes, which serves as the supporting foundation for the device unit and is used to position and install the longitudinal moving pin unit, the transverse moving clamping unit, and the vision unit. The longitudinal shifting ejector unit is fixedly installed on the base and consists of a longitudinal shifting support, an ejector pin, and a longitudinal shifting servo motor. The longitudinal shifting servo motor and the ejector pin are connected by a transmission. The longitudinal shifting ejector unit clamps the tail of the needle body to be detected and placed through the ejector pin. Under the drive of the longitudinal shifting servo motor, the relative distance between the ejector pin and the transverse shifting clamping unit is adjusted along the longitudinal y-axis. The transverse clamping unit is mounted on the base and consists of a transverse support, a clamp, a transverse servo motor, and a clamping servo motor. The clamp is slidably mounted on the transverse support and has clamping components. The output end of the transverse servo motor is connected to the transverse support. The clamp can adjust its rotation along the transverse x-axis under the drive of the transverse servo motor. The output end of the clamping servo motor is connected to the clamping components of the clamp. The clamping servo motor drives the clamping components to slide along the clamp. The clamping components can open and close between the clamping components and the clamp under the drive of the clamping servo motor to complete the clamping and releasing of the needle tip. The transverse clamping unit clamps the needle tip of the machine needle body through the clamping components of the clamp. The vision unit is mounted on the base and consists of a pole support, a camera clamp, and a vision camera. The camera clamp is installed on the top of the pole support and can be moved to adjust the horizontal spacing. The vision camera is installed on the camera clamp with its lens facing vertically downwards to collect image information of the needle body being inspected. The control unit, consisting of a main processor, servo drive module, and power supply module, is used to coordinate the operation of the device. It interacts with the vision camera through a data transmission interface to exchange image data signals and precisely drives each servo motor to perform actions such as longitudinal movement, lateral movement, clamping, and release, ensuring that each motion unit works in coordination with the vision inspection process.

[0007] In the aforementioned machine vision-based industrial sewing machine needle elasticity testing device, the longitudinal support base is fixedly connected to the base, the ejector pin is slidably mounted on the longitudinal support base, and the output end of the longitudinal servo motor is connected to the ejector pin drive, thereby driving the ejector pin to adjust and move in the longitudinal y-axis direction through the longitudinal servo motor.

[0008] The output end of the clamping servo motor is connected to an adjusting drive threaded rod through a linkage head. The drive threaded rod is rotatably connected to the clamping part for positioning. The fixture is provided with a positioning groove for sliding positioning of the clamping part. The clamping servo motor drives the clamping part to slide along the positioning groove through the drive threaded rod.

[0009] In the aforementioned machine vision-based industrial sewing machine needle elasticity testing device, the upright support is set perpendicular to the base, the bottom is fixed to the screw hole of the base by a threaded connection, and the top is detachably connected to the camera clamp by a locking nut. The overall height of the camera clamp and the vision camera can be adjusted by loosening or tightening the locking nut.

[0010] In the aforementioned machine vision-based industrial sewing machine needle elasticity testing device, the camera clamp is arranged horizontally and includes a base plate, a positioning rod, an adjusting threaded rod, and two clamping plates. The two clamping plates have an elastic force that allows them to clamp close to each other. The vision camera is clamped between the two clamping plates, and the two clamping plates are threadedly connected to the adjusting threaded rod, allowing for lateral spacing adjustment as the adjusting threaded rod rotates.

[0011] In the aforementioned machine vision-based industrial sewing machine needle elasticity testing device, the servo drive module integrates three servo drivers. The main processor establishes a bidirectional instruction and status feedback connection with the three servo drivers. The servo drive module, power supply module, and corresponding servo motors form a high-voltage link. The power supply module provides stable power input, and the servo drivers output controllable drive signals to each servo motor according to the instructions of the main processor.

[0012] In the aforementioned machine vision-based industrial sewing machine needle elasticity testing device, the output shaft of the transverse servo motor is connected to a helical gear shaft via a linkage head. The helical gear shaft passes through the fixture and is connected to the gear disk on the transverse support seat via gear transmission. The fixture is rotatably mounted on the transverse support seat, and the rotation of the helical gear shaft drives the fixture to rotate relative to each other, thereby adjusting the position along the transverse x-axis.

[0013] In the aforementioned machine vision-based industrial sewing machine needle elasticity testing device, the pin column includes an outer positioning sleeve and an inner sliding sleeve. The outer positioning sleeve and the inner sliding sleeve are connected by ball bearings for directional sliding. The output end of the longitudinal servo motor is connected to a second drive threaded rod through a connector. The second drive threaded rod is connected to the inner sliding sleeve by a threaded transmission. The end of the inner sliding sleeve clamps the needle being tested, thereby causing the longitudinal servo motor to drive the inner sliding sleeve to adjust and move in the longitudinal y-axis direction through the second drive threaded rod.

[0014] In the aforementioned machine vision-based industrial sewing machine needle elasticity testing device, the main processor is independently deployed on the outside of the base, and the main processor preferably adopts a Raspberry Pi microcontroller or a programmable logic controller (PLC).

[0015] The advantages of this utility model: Multi-dimensional adjustment: The automatic and precise adjustment of the longitudinal shifting pin unit pushing the needle along the y-axis and the transverse shifting clamping unit clamping the needle along the x-axis, combined with the height adjustment of the vision unit, can adapt to needles of different specifications and different testing requirements, with high flexibility.

[0016] Stable clamping: The longitudinal moving pin unit and the transverse moving clamping unit clamp the needle from the top and lower middle parts respectively. With the clamping action of the clamping servo motor, the needle is kept stable and does not shake during the detection process, thus improving the detection accuracy.

[0017] Precise visual acquisition: The height of the vision unit and the lateral adjustment of the camera fixture allow the vision camera to be precisely aligned with the needle body. The vertically downward lens can clearly acquire images of the needle body, providing reliable image data for the detection of the plastic deformation of the needle, improving detection efficiency and contributing to the accuracy of automated detection.

[0018] The needle tail and tip are securely held by a split clamp. The needle tip is precisely moved laterally by a servo motor driven by the clamp head. At the same time, the servo motor control system controls the lateral load in real time. Based on this, an industrial camera is used to capture high-definition images of the needle after plastic deformation. The images are then processed by a customized machine vision algorithm to automatically identify and accurately calculate the plastic deformation at the needle tip.

[0019] This testing solution enables fully automated operation, eliminating the interference of manual operation on measurement accuracy at the source. While ensuring that the testing accuracy meets the standards, it significantly improves testing efficiency and the consistency of measurement results, effectively meeting the standardization and quantification needs of industrial batch testing scenarios. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the longitudinally moving ejector pin unit in this utility model; Figure 3 This is a schematic diagram of the transverse clamping unit in this utility model; Figure 4 This is an exploded view of the transverse clamping unit in this utility model; Figure 5 This is an exploded view of the longitudinally moving ejector pin unit in this utility model; Figure 6 This is an exploded view of the longitudinally moving ejector pin unit in another direction in this utility model; Figure 7 This is a schematic diagram of the circuit connection of the control unit in this utility model. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0024] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is 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 can mean that the first feature is 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.

[0026] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0027] Please see Figures 1 to 7 The present invention provides an industrial sewing machine needle elasticity testing device based on machine vision, comprising a base 1, a longitudinal moving pin unit 2, a transverse moving clamping unit 3, a vision unit 4, and a control unit disposed on the base 1. The base 1 is a metal plate with several mounting screw holes, which serves as the supporting foundation for the device unit and is used to position and install the longitudinal moving pin unit 2, the transverse moving clamping unit 3 and the vision unit 4. The longitudinal shifting ejector unit 2 is fixedly installed on the base 1 and consists of a longitudinal shifting support 21, an ejector pin 22 and a longitudinal shifting servo motor 23. The longitudinal shifting ejector unit is connected to the ejector pin 22 through a transmission. The longitudinal shifting ejector unit clamps the tail of the needle body of the needle 5 being detected and placed through the ejector pin 22. Under the drive of the longitudinal shifting servo motor 23, the relative distance between the ejector pin 22 and the transverse shifting clamping unit 3 is adjusted along the longitudinal y-axis direction. The transverse clamping unit 3 is mounted on the base 1 and consists of a transverse support 31, a clamp 32, a transverse servo motor 33, and a clamping servo motor 34. The clamp 32 is slidably mounted on the transverse support 31, and a clamping element 321 is provided on the clamp 32. The output end of the transverse servo motor 33 is connected to the transverse support 31 for transmission. The clamp 32 can adjust its rotation along the transverse x-axis direction under the drive of the transverse servo motor 33. The output end of the clamping servo motor 34 is connected to the clamp 32 for clamping. The clamping servo motor 34 drives the clamping servo motor 34 to slide along the clamp 32. Under the drive of the clamping servo motor 34, the clamping servo motor 321 can realize the opening and closing action between the clamping servo motor 321 and the clamp 32 to complete the clamping and releasing of the needle tip. The transverse clamping unit 3 clamps the needle tip of the needle body of the machine needle 5 through the clamping servo motor 321 of the clamp 32. The transverse servo motor 33 and the clamping servo motor 34 are fixedly connected to the clamp through the mounting plate, and the two rotate as a whole with the clamp.

[0028] The vision unit 4 is assembled on the base 1 and consists of a support pole 41, a camera clamp 42 and a vision camera 43. The camera clamp 42 is installed on the top of the support pole 41 and can be moved to adjust the horizontal spacing. The vision camera 43 is installed on the camera clamp 42 with its lens facing vertically downward to collect image information of the needle body of the tested needle 5. The control unit, consisting of a main processor, servo drive module, and power supply module, is used to coordinate the operation of the device. It interacts with the vision camera 43 through a data transmission interface to exchange image data signals and precisely drives each servo motor to perform actions such as longitudinal movement, lateral movement, clamping, and release, ensuring that each motion unit works in coordination with the vision inspection process.

[0029] Furthermore, the longitudinal support 21 is fixedly connected to the base 1, the ejector pin 22 is slidably mounted on the longitudinal support 21, and the output end of the longitudinal servo motor 23 is connected to the ejector pin 22 for transmission, thereby driving the ejector pin 22 to adjust and move in the longitudinal y-axis direction through the longitudinal servo motor 23. The longitudinal servo motor 23 is installed and fixed to other positions of the equipment through a mounting plate.

[0030] Furthermore, the output end of the clamping servo motor 34 is connected to an adjusting drive threaded rod 323 via a linkage head. The drive threaded rod 323 is rotatably connected to the clamping member 321. The clamp 32 is provided with a positioning groove 322 for sliding positioning of the clamping member 321. The clamping servo motor 34 drives the clamping member 321 to slide along the positioning groove 322 via the drive threaded rod 323.

[0031] Furthermore, the pole support 41 is set perpendicular to the base 1, and its bottom is fixed to the screw hole of the base 1 by a threaded connection. Its top is detachably connected to the camera clamp 42 by a locking nut 411. The overall height of the camera clamp 42 and the visual camera 43 can be adjusted by loosening or tightening the locking nut 411.

[0032] Specifically, the camera clamp 42 is arranged in a horizontal direction. The camera clamp 42 includes a base plate 421, a positioning rod 422, an adjusting threaded rod 423, and two clamping plates 424. The two clamping plates 424 have an elastic force that allows them to clamp close to each other. The visual camera 43 is clamped between the two clamping plates 424. The two clamping plates 424 are threadedly connected to the adjusting threaded rod 423, and the lateral spacing can be adjusted as the adjusting threaded rod 423 rotates.

[0033] Furthermore, the servo drive module integrates three servo drivers. The main processor establishes a bidirectional instruction and status feedback connection with the three servo drivers. The servo drive module forms a high-voltage link with the power supply module and the corresponding servo motor. The power supply module provides stable power input, and the servo drivers output controllable drive signals to each servo motor according to the instructions of the main processor.

[0034] Furthermore, the output shaft of the transverse servo motor 33 is connected to a helical gear shaft 331 via a linkage head. The helical gear shaft 331 passes through the clamp 32 and is connected to the gear disk 332 on the transverse support 31 via gear transmission. The clamp 32 is rotatably mounted on the transverse support 31. The rotation of the helical gear shaft 331 drives the clamp 32 to rotate relative to the whole, thereby adjusting the position along the transverse x-axis direction.

[0035] Furthermore, the ejector pin 22 includes an outer positioning sleeve 221 and an inner sliding sleeve 222. The outer positioning sleeve 221 and the inner sliding sleeve 222 are connected by ball bearings for directional sliding. The output end of the longitudinal servo motor 23 is connected to a second drive threaded rod 231 through a connector. The second drive threaded rod 231 is threadedly connected to the inner sliding sleeve 222. The end of the inner sliding sleeve 222 clamps the measuring needle, thereby causing the longitudinal servo motor 23 to drive the inner sliding sleeve 222 to move longitudinally along the y-axis through the second drive threaded rod 231. Furthermore, the main processor is independently deployed on the outside of the base 1, and the main processor preferably adopts a Raspberry Pi microcontroller or a programmable logic controller (PLC).

[0036] The working principle of this utility model is as follows: Needle placement: Place the needle 5 to be tested in the clamp 32 of the transverse clamping unit 3. The control unit sends a clamping command to drive the clamping servo motor 34 to drive the clamping piece 321 to clamp the needle tip of the needle 5. After clamping, the control unit sends a pressing command to drive the longitudinal servo motor 23 to drive the ejector pin 22 to move along the y direction, clamping and pressing the tail of the needle 5. Loosen the locking nut 411 on the top of the support bracket 41 of the vision unit 4, adjust the camera clamp 42 and the camera height 43, and then tighten it to fix it. If it is necessary to fine adjust the horizontal position of the camera, rotate the adjusting threaded rod 423 of the camera clamp 42 and move the clamping plate 424 to adjust the position of the camera 43 so that the vision camera lens is accurately aligned with the needle body to be tested. Applying a transverse load: According to the detection requirements corresponding to the needle specifications, a quantitative transverse load is applied. The control unit sends a transverse position command and a holding time command in the x-direction to the transverse servo motor 33. After moving to the position, the needle 5 is held bent for a certain period of time. After holding, the control unit controls the transverse motor 33 to reset along the x-axis and sends a rapid release command to the clamping servo motor 34 to complete the load release process. Image acquisition and detection: When the vision camera 43 is started, it captures an image of the 5 needles of the machine needle vertically downwards and transmits the image to the background main processor. Through image recognition algorithms such as edge detection model and pixel comparison model, the plastic deformation of the machine needle is detected to determine whether the elastic quality of the machine needle is qualified.

[0037] Needle removal: After the inspection is completed, the longitudinal servo motor 23 is driven to release the clamp at the end of the ejector pin 22, and the needle needs to be removed to complete one inspection process; if it is an automated production line, it can be combined with actions such as unloading by a robotic arm to achieve continuous inspection.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the patent protection scope of this utility model should be determined by the appended claims.

Claims

1. A machine vision-based industrial sewing machine needle elasticity testing device, characterized in that: It includes a base (1), a longitudinal shift pin unit (2) disposed on the base (1), a transverse shift clamping unit (3), a vision unit (4) and a control unit; The base (1) is a metal plate with several mounting screw holes, which serves as the supporting foundation for the device unit and is used to realize the positioning and installation of the longitudinal moving pin unit (2), the transverse moving clamping unit (3) and the vision unit (4). The longitudinal shifting ejector unit (2) is fixedly installed on the base (1) and consists of a longitudinal shifting support (21), an ejector pin (22) and a longitudinal shifting servo motor (23). The longitudinal shifting ejector unit is connected to the ejector pin (22) through a transmission. The longitudinal shifting ejector unit clamps the tail of the needle body of the needle (5) being detected and placed through the ejector pin (22). Under the drive of the longitudinal shifting servo motor (23), the relative distance between the ejector pin (22) and the transverse shifting clamping unit (3) is adjusted along the longitudinal y-axis direction. The transverse clamping unit (3) is mounted on the base (1) and consists of a transverse support (31), a clamp (32), a transverse servo motor (33), and a clamping servo motor (34). The clamp (32) is slidably mounted on the transverse support (31), and a clamping element (321) is provided on the clamp (32). The output end of the transverse servo motor (33) is connected to the transverse support (31) for transmission. The clamp (32) can adjust itself along the transverse x-axis direction under the drive of the transverse servo motor (33). The rotation of the clamping servo motor (34) and the output end of the clamping servo motor (34) are connected to the clamping member (321) of the clamp (32). The clamping servo motor (34) drives the clamping member (321) to slide along the clamp (32). The clamping member (321) can realize the opening and closing action between the clamping member (321) and the clamp (32) under the drive of the clamping servo motor (34) to complete the clamping and releasing of the needle tip. The transverse clamping unit (3) clamps the needle tip of the needle body of the machine needle (5) through the clamping member (321) of the clamp (32). The vision unit (4) is mounted on the base (1) and consists of a support pole (41), a camera clamp (42) and a vision camera (43); The camera clamp (42) is installed on the top of the pole support (41). The camera clamp (42) can be moved to adjust the horizontal spacing. The vision camera (43) is installed on the camera clamp (42) with its lens facing vertically downwards to collect image information of the needle body of the tested needle (5). The control unit consists of a main processor, a servo drive module and a power supply module. It is used to coordinate the operation of the device. It interacts with the vision camera (43) through the data transmission interface to realize image data signal interaction and accurately drives each servo motor to perform longitudinal, lateral, clamping and releasing actions to ensure that each motion unit works in coordination with the vision detection process.

2. The machine vision-based industrial sewing machine needle elasticity testing device according to claim 1, characterized in that: The longitudinal support base (21) is fixedly connected to the base (1), and the ejector pin (22) is slidably mounted on the longitudinal support base (21). The output end of the longitudinal servo motor (23) is connected to the ejector pin (22) for transmission, thereby driving the ejector pin (22) to adjust and move in the longitudinal y-axis direction through the longitudinal servo motor (23).

3. The machine vision-based industrial sewing machine needle elasticity testing device according to claim 1, characterized in that: The output end of the clamping servo motor (34) is connected to an adjusting drive threaded rod (323) via a linkage head. The drive threaded rod (323) is rotatably connected to the clamping member (321). The clamp (32) is provided with a positioning groove (322) for sliding positioning of the clamping member (321). The clamping servo motor (34) drives the clamping member (321) to slide along the positioning groove (322) via the drive threaded rod (323).

4. The machine vision-based industrial sewing machine needle elasticity testing device according to claim 1, characterized in that: The pole support (41) is set perpendicular to the base (1). The bottom is fixed to the screw hole of the base (1) by a threaded connection. The top is detachably connected to the camera clamp (42) by a locking nut (411). The overall height of the camera clamp (42) and the vision camera (43) can be adjusted by loosening or tightening the locking nut (411).

5. A machine vision-based industrial sewing machine needle elasticity testing device according to claim 1 or 4, characterized in that: The camera clamp (42) is set in the horizontal direction. The camera clamp (42) includes a base plate (421), a positioning rod (422), an adjusting threaded rod (423), and two clamping plates (424). The two clamping plates (424) have an elastic force that clamps them close to each other. The visual camera (43) is clamped between the two clamping plates (424). The two clamping plates (424) are threadedly connected to the adjusting threaded rod (423), and the horizontal spacing can be adjusted as the adjusting threaded rod (423) rotates.

6. The machine vision-based industrial sewing machine needle elasticity testing device according to claim 1, characterized in that: The servo drive module integrates three servo drives. The main processor establishes a bidirectional instruction and status feedback connection with the three servo drives. The servo drive module forms a high-voltage link with the power supply module and the corresponding servo motor. The power supply module provides stable power input, and the servo drives output controllable drive signals to each servo motor according to the instructions of the main processor.

7. The machine vision-based industrial sewing machine needle elasticity testing device according to claim 1, characterized in that: The output shaft of the transverse servo motor (33) is connected to a helical gear shaft (331) via a linkage head. The helical gear shaft (331) passes through the clamp (32) and is connected to the gear disk (332) on the transverse support (31) by gear transmission. The clamp (32) is rotatably mounted on the transverse support (31). The rotation of the helical gear shaft (331) drives the clamp (32) to rotate relative to the whole, thereby adjusting the position along the transverse x-axis direction.

8. The machine vision-based industrial sewing machine needle elasticity testing device according to claim 2, characterized in that: The ejector pin (22) includes an outer positioning sleeve (221) and an inner sliding sleeve (222). The outer positioning sleeve (221) and the inner sliding sleeve (222) are connected by ball bearings for directional sliding. The output end of the longitudinal servo motor (23) is connected to a second drive threaded rod (231) through a connector. The second drive threaded rod (231) and the inner sliding sleeve (222) are connected by a threaded transmission. The end of the inner sliding sleeve (222) clamps the needle being measured, thereby driving the inner sliding sleeve (222) to move longitudinally along the y-axis through the second drive threaded rod (231).

9. The machine vision-based industrial sewing machine needle elasticity testing device according to claim 6, characterized in that: The main processor is independently deployed on the outside of the base (1), and the main processor is preferably a Raspberry Pi microcontroller or a programmable logic controller (PLC).

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