Self-focusing laser pocket opening machine for clothes

Abstract

The invention belongs to the technical field of garment production and processing, and particularly relates to a garment self-focusing laser pocket opening machine which comprises a laser generation module, a motion control module, a position recognition module and a control system, the laser generation module is composed of a laser generator, a laser power source and an optical focusing system, and the laser generator generates laser beams with specific wavelength and power; the laser power supply provides stable energy, the control system and the laser generation module are integrated together, the motion control module adopts a mechanical transmission mechanism to drive a clamp and clothes to move together according to a preset path to achieve an accurate cutting track, the clamp is used for fixing clothes cloth, and the position recognition module is used for detecting the position, posture and size of the clothes cloth. And the position and the shape of the bag opening are determined through an image recognition algorithm, and accurate position information is provided for laser cutting. According to the bag opening cutting device, bag opening cutting is rapidly completed through the precise motion control module, the efficient laser generation module and the position recognition module.

Description

Technical Field

[0001] The present invention relates to the technical field of garment production and processing, and particularly to a self-focusing laser bag-opening machine for clothing. Background Art

[0002] In the traditional process of clothing production, the bag-opening process of clothing pockets usually relies on manual operation. Manual bag-opening is not only inefficient, but also due to the differences in manual operation, it is difficult to ensure that the size and shape of each pocket are exactly the same, thus affecting the overall quality and production efficiency of clothing. With the continuous improvement of the requirements for production efficiency and product quality in the clothing industry, it is of great practical significance to develop a device that can achieve automatic and precise bag-opening. Summary of the Invention

[0003] Based on the technical problems existing in the prior art, the present invention provides a self-focusing laser bag-opening machine for clothing.

[0004] A self-focusing laser bag-opening machine for clothing provided by the present invention includes a laser generation module, a motion control module, a position recognition module, and a control system. The laser generation module consists of a laser generator, a laser power supply, and an optical focusing system. The laser generator generates a laser beam with a specific wavelength and power, the laser power supply provides stable energy, and the optical focusing system focuses the laser beam on the surface of the bag opening to achieve the energy density required for cutting. The control system is integrated with the laser generation module. The motion control module drives the fixture and the clothing to move along a preset path by means of a mechanical transmission mechanism to achieve an accurate cutting trajectory. The fixture is used to fix the clothing fabric, and the position recognition module is used to detect the position, posture, and size of the clothing fabric, and then determine the position and shape of the bag opening through an image recognition algorithm to provide accurate position information for laser cutting. When the clothing fabric is fixed to the fixture, the position recognition module will automatically detect the position, posture, and size of the clothing fabric, and then transmit the collected data to the control system. Then, the position and shape of the bag opening are determined through an image recognition algorithm to provide accurate position information for laser cutting. Then, the control system will send instructions to the laser generation module and the movement control module. The movement control module will drive the clothing to move along a preset path through the fixture, and at the same time, the laser generation module will perform laser cutting.

[0005] Preferably, to reduce image noise, the image recognition algorithm first performs Gaussian filtering. The formula for the two-dimensional Gaussian function is:

[0006]

[0007] where (x,y) are the pixel coordinates of the image, μ is usually taken as, σ is the standard deviation, which determines the width of the Gaussian distribution. A Gaussian kernel is generated through this formula and convolved with the original image to achieve filtering.

[0008] Preferably, the image recognition algorithm calculates the image gradient using first-order partial derivatives. For an image I(x, y), the approximate values of its gradients in the x and y directions are respectively:

[0009] G x = I(x + 1, y) - I(x - 1, y)

[0010] G y = I(x, y + 1) - I(x, y - 1)

[0011] In addition, the calculation formulas for the gradient magnitude G and direction θ are respectively

[0012] Preferably, the image recognition algorithm refines the gradient magnitude image and retains the local gradient maximum values: that is, compares the gradient magnitude of the current pixel with the gradient magnitudes of adjacent pixels along the gradient direction. If the current pixel value is not a local maximum, it is suppressed (set to 0).

[0013] Preferably, the image recognition algorithm sets high and low thresholds T h and T l (T h > T l ). Pixels higher than T h are determined as strong edges, pixels lower than T l are excluded. For pixels between the two, if they are connected to a strong edge, they are retained as edges; otherwise, they are excluded. Through this step, information such as the fabric edge can be extracted, providing a basis for determining the position of the bag mouth.

[0014] Preferably, the motion control module includes a workbench. A pair of fixing plates are fixed at the rear of the top of the workbench. A screw rod is rotatably connected to the fixing plates. A pair of bearing seats are fixed at the front of the top of the workbench. The screw rod is rotatably connected to the bearing seats. Two sliders are respectively threadedly connected to the two screw rods. An electric slide rail is commonly fixed between the two sliders. A sliding seat is slidably connected to the electric slide rail. A connecting plate is fixed to the top of the sliding seat. The back of one of the fixing plates is fixed with a motor. The output shaft of the motor is fixedly connected to the end of the corresponding screw rod. Synchronous wheels are respectively fixedly sleeved on the front ends of the two screw rods. The two synchronous wheels are connected by a synchronous belt. A protective plate for covering the synchronous wheels and the synchronous belt is fixed at the front of the top of the workbench; the output shaft of the motor will drive the connected screw rod to rotate, and then through the transmission cooperation of the synchronous belt and the two synchronous wheels, the two screw rods are driven to rotate synchronously. Then the screw rods will drive the sliders to move back and forth, and the sliders will synchronously drive the electric slide rail to move back and forth, thereby realizing the back-and-forth movement of the clothing fabric. The electric slide rail can drive the sliding seat to move left and right, and the sliding seat will synchronously drive the connecting plate, the fixture and the clothing fabric to move left and right, thereby realizing an accurate cutting trajectory.

[0015] Preferably, the fixture is fixed at the bottom end of the connecting plate, and the position recognition module is fixed on the front end face of the fixture; in this way, the position, posture and size of the clothing fabric can be detected in real time through the position recognition module.

[0016] Preferably, a power sensor is also fixed on the side of the laser generator. The power sensor is used to measure the actual output power of the laser of the laser generator and transmit the data to the control system. The control system receives the signal of the power sensor and compares the actual output power with the preset power value. By continuously adjusting the control signal, the output power of the laser generator is stabilized at the preset value that meets the processing requirements.

[0017] Preferably, the control signal u(t) adopts the proportional-integral-derivative PID control algorithm, and its basic control law formula is:

[0018]

[0019] where u is the output of the controller, that is, the control signal for adjusting the power of the laser generator; K p is the proportionality coefficient, T i is the integral time constant, T d is the derivative time constant; e(t) is the deviation value between the current actual power and the preset power.

[0020] Compared with the prior art, the present invention provides a self-focusing laser bagging machine for clothing, which has the following beneficial effects:

[0021] 1. For a self-focusing laser bagging machine for clothing, the efficiency of traditional manual bagging is relatively low, while the laser bagging machine of the present invention can achieve automated continuous production. It quickly completes the cutting of the bag mouth through a precise motion control module and an efficient laser generation module. For example, the machine can continuously perform bagging operations on piece after piece of fabric according to a preset program, greatly shortening the processing time of a single clothing pocket. Compared with manual operation, more pockets can be processed per unit time, effectively improving the overall efficiency of clothing production.

[0022] 2. For a self-focusing laser bagging machine for clothing, with the help of a high-precision position recognition module, such as an industrial camera and an advanced image recognition algorithm, it can accurately identify information such as the position and shape of the bag mouth on the fabric. The motion control module can complete precise cutting path operations based on this precise information. Whether it is a simple square bag mouth or a complex special-shaped bag mouth, the size and shape of each bag mouth can be guaranteed to be highly consistent, avoiding size differences and irregular shapes caused by human factors in manual operation, thereby improving the stability of clothing quality.

[0023] 3. A self-focusing laser bag-opening machine for clothing. The laser generation module can effectively cut different fabrics by adjusting parameters such as laser power, wavelength, focus position, and spot size according to different fabric materials (such as thin cotton, thick denim, leather, etc.) and processing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. is a schematic diagram of the overall structure of a self-focusing laser bag-opening machine for clothing proposed by the present invention;

[0025] Figure 2 FIG. is a schematic diagram of the first-angle structure of the motion control module of a self-focusing laser bag-opening machine for clothing proposed by the present invention;

[0026] Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure at A;

[0027] Figure 4 FIG. is a schematic diagram of the second-angle structure of the motion control module of a self-focusing laser bag-opening machine for clothing proposed by the present invention;

[0028] Figure 5 For the present invention Figure 2 Schematic diagram of the enlarged structure at B;

[0029] Figure 6 FIG. is a schematic diagram of the principle of a self-focusing laser bag-opening machine for clothing proposed by the present invention.

[0030] In the figure: 1. Workbench; 2. Laser generation module; 3. Power sensor; 4. Laser generator; 5. Fixed plate; 6. Bearing seat; 7. Screw; 8. Slide block; 9. Motor; 10. Synchronous pulley; 11. Synchronous belt; 12. Protective plate; 13. Electric slide rail; 14. Slide seat; 15. Connecting plate; 16. Fixture; 17. Position recognition module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0033] Refer toFigures 1 - 6 , a self - focusing laser bag - opening machine for clothing, comprising a laser generation module 2, a motion control module, a position recognition module 17, and a control system. The laser generation module 2 consists of a laser generator 4, a laser power supply, and an optical focusing system. The laser generator 4 generates a laser beam with a specific wavelength and power. The laser power supply provides stable energy. The optical focusing system focuses the laser beam onto the surface of the bag opening to achieve the energy density required for cutting. The control system and the laser generation module 2 are integrated. The motion control module drives the fixture 16 and the clothing to move along a preset path by means of a mechanical transmission mechanism, realizing an accurate cutting trajectory. The fixture 16 is used to fix the clothing fabric. The position recognition module 17 is used to detect the position, posture, and size of the clothing fabric, and then determine the position and shape of the bag opening through an image recognition algorithm, providing accurate position information for laser cutting;

[0034] It should be noted that the position recognition module 17 can be an industrial camera or other devices capable of detecting the position, posture, and size of the clothing fabric in real - time, and no specific limitation is made here;

[0035] It should be noted that when the clothing fabric is fixed to the fixture 16, the position recognition module 17 will automatically detect the position, posture, and size of the clothing fabric, then transmit the collected data to the control system, determine the position and shape of the bag opening through an image recognition algorithm, provide accurate position information for laser cutting, and then the control system will send instructions to the laser generation module 2 and the movement control module. The movement control module will drive the clothing to move along a preset path through the fixture 16, and at the same time, the laser generation module 2 will perform laser cutting.

[0036] Furthermore, to reduce image noise, the image recognition algorithm first performs Gaussian filtering. The two - dimensional Gaussian function formula is:

[0037]

[0038] where (x,y) are the image pixel coordinates, μ is usually taken as 0, σ is the standard deviation, which determines the width of the Gaussian distribution. A Gaussian kernel is generated through this formula and is convolved with the original image to achieve filtering.

[0039] Furthermore, the image recognition algorithm calculates the image gradient using the first - order partial derivative. For the image I(x,y), its approximate gradient values in the x and y directions are respectively:

[0040] G x =I(x + 1,y)-I(x - 1,y)

[0041] G y =I(x,y + 1)-I(x,y - 1)

[0042] In addition, the calculation formulas for the gradient magnitude G and direction θ are respectively

[0043] Furthermore, the image recognition algorithm refines the gradient magnitude image and retains the local gradient maximum: that is, it compares the gradient magnitude of the current pixel with the gradient magnitudes of adjacent pixels along the gradient direction, and if the current pixel value is not the local maximum, it is suppressed (set to 0).

[0044] Furthermore, the image recognition algorithm sets high and low thresholds T h and T l (T h >T l ). Pixels higher than T h are determined as strong edges, pixels lower than T l are excluded, and for pixels between the two, if they are connected to a strong edge, they are retained as edges, otherwise they are excluded. Through this step, information such as the fabric edge can be extracted, providing a basis for determining the position of the bag mouth.

[0045] Furthermore, the motion control module includes a workbench 1. A pair of fixing plates 5 are fixed at the rear of the top of the workbench 1. A screw rod 7 is rotatably connected to the fixing plates 5. A pair of bearing seats 6 are fixed at the front of the top of the workbench 1. The screw rod 7 is rotatably connected to the bearing seats 6. Two sliders 8 are respectively threadedly connected to the two screw rods 7. An electric slide rail 13 is fixedly connected between the two sliders 8. A sliding seat 14 is slidably connected to the electric slide rail 13. A connecting plate 15 is fixed to the top of the sliding seat 14. The back of one of the fixing plates 5 is fixed with a motor 9. The output shaft of the motor 9 is fixedly connected to the end of the corresponding screw rod 7. Synchronous wheels 10 are respectively fixedly sleeved on the front ends of the two screw rods 7. The two synchronous wheels 10 are connected by a synchronous belt 11. A protective plate 12 for covering the synchronous wheels 10 and the synchronous belt 11 is fixed at the front of the top of the workbench 1;

[0046] It should be noted that the output shaft of the motor 9 drives the connected screw rod 7 to rotate. Then, through the transmission cooperation of the synchronous belt 11 and the two synchronous wheels 10, the two screw rods 7 are driven to rotate synchronously. Then, the screw rods 7 drive the sliders 8 to move back and forth, and the sliders 8 synchronously drive the electric slide rail 13 to move back and forth, thereby realizing the back-and-forth movement of the clothing fabric. The electric slide rail 13 can drive the sliding seat 14 to move left and right, and the sliding seat 14 synchronously drives the connecting plate 15, the fixture 16 and the clothing fabric to move left and right, thereby realizing an accurate cutting trajectory.

[0047] Furthermore, the fixture 16 is fixed to the bottom end of the connecting plate 15, and the position recognition module 17 is fixed to the front end face of the fixture 16;

[0048] It should be noted that in this way, the position, attitude and size of the clothing fabric can be detected in real time through the position recognition module 17.

[0049] Furthermore, a power sensor 3 is fixedly installed on the side of the laser generator 4. The power sensor 3 is used to measure the actual output power of the laser emitted by the laser generator 4 and transmit the data to the control system. The control system receives the signal from the power sensor 3, compares the actual output power with the preset power value, and continuously adjusts the control signal to stabilize the output power of the laser generator at the preset value that meets the processing requirements.

[0050] Furthermore, the control signal u(t) adopts the proportional-integral-derivative PID control algorithm, and its basic control law formula is:

[0051]

[0052] where u is the output of the controller, that is, the control signal for adjusting the power of the laser generator 4; K p is the proportionality coefficient, T i is the integral time constant, T d is the derivative time constant; e(t) is the deviation value between the current actual power and the preset power;

[0053] It should be noted that a database of different fabric materials and corresponding processing parameters (including appropriate laser power) is established in advance. When the fabric material information and processing requirements (such as cutting speed, cutting thickness, etc.) are input, the control system queries the corresponding recommended power value from the database, uses this as the initial setting value, and then makes real-time adjustments in combination with feedback control. The establishment of this database is based on the summary and induction of a large amount of experimental data.

[0054] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An automatic focusing laser bag-opening machine for clothing, comprising a laser generation module (2), a motion control module, a position recognition module (17) and a control system, characterized in that, The laser generating module (2) is composed of a laser generator (4), a laser power supply, and an optical focusing system. The laser generator (4) generates a laser beam with a specific wavelength and power. The laser power supply provides stable energy. The optical focusing system focuses the laser beam onto the surface of the bag mouth to achieve the energy density required for cutting. The control system and the laser generating module (2) are integrated. The motion control module drives the fixture (16) and the clothing to move along a preset path by means of a mechanical transmission mechanism to achieve an accurate cutting trajectory. The fixture (16) is used to fix the clothing fabric. The position recognition module (17) is used to detect the position, attitude, and size of the clothing fabric, and then determine the position and shape of the bag mouth through an image recognition algorithm to provide accurate position information for laser cutting.

2. The automatic focusing laser bag opening machine for clothing according to claim 1, characterized in that, To reduce image noise, the image recognition algorithm first performs Gaussian filtering. The formula for the two-dimensional Gaussian function is: where (x, y) are the pixel coordinates of the image, μ is usually taken as 0, and σ is the standard deviation, which determines the width of the Gaussian distribution. A Gaussian kernel is generated through this formula and convolved with the original image to achieve filtering.

3. The automatic focusing laser bag opening machine for clothing according to claim 1, characterized in that, The image recognition algorithm calculates the image gradient using the first-order partial derivatives. For the image I(x, y), the approximate values of its gradients in the x and y directions are respectively: G x = I(x + 1, y) - I(x - 1, y) G y = I(x, y + 1) - I(x, y - 1 In addition, the calculation formulas for the gradient magnitude G and the direction θ are respectively and 4. A self-focusing laser bag-opening machine for clothing according to claim 1, characterized in that, The image recognition algorithm refines the gradient magnitude image and retains the local gradient maximum: that is, compares the gradient magnitude of the current pixel with the gradient magnitudes of the adjacent pixels along the gradient direction. If the current pixel value is not the local maximum, it is suppressed (set to 0).

5. The automatic focusing laser bag opening machine for clothing according to claim 1, characterized in that, The image recognition algorithm sets high and low thresholds T h and T l (T h >T l ). Pixels higher than T h are determined as strong edges, pixels lower than T l are excluded. For pixels between the two, if they are connected to a strong edge, they are retained as edges, otherwise they are excluded. Through this step, information such as the fabric edge can be extracted, providing a basis for determining the position of the bag mouth.

6. The automatic focusing laser bag opening machine for clothing according to claim 1, wherein The motion control module includes a workbench (1). A pair of fixed plates (5) are fixed at the rear of the top of the workbench (1). A screw (7) is rotatably connected to the fixed plates (5). A pair of bearing seats (6) are fixed at the front of the top of the workbench (1). The screw (7) is rotatably connected to the bearing seats (6). Two sliders (8) are respectively threadedly connected to the two screws (7). An electric slide rail (13) is fixedly connected between the two sliders (8). A sliding seat (14) is slidably connected to the electric slide rail (13). A connecting plate (15) is fixed at the top of the sliding seat (14). The back of one of the fixed plates (5) is fixed with a motor (9). The output shaft of the motor (9) is fixedly connected to the end of the corresponding screw (7). Synchronous wheels (10) are respectively fixedly sleeved at the front ends of the two screws (7). The two synchronous wheels (10) are connected by a synchronous belt (11). A protective plate (12) for covering the synchronous wheels (10) and the synchronous belt (11) is fixed at the front of the top of the workbench (1).

7. The automatic focus laser bag opening machine for clothing according to claim 6, wherein, The fixture (16) is fixed at the bottom end of the connecting plate (15), and the position recognition module (17) is fixed on the front end face of the fixture (16).

8. A self-focusing laser bag-opening machine for clothing according to claim 1, characterized in that, A power sensor (3) is also fixed on the side of the laser generator (4). The power sensor (3) is used to measure the actual output power of the laser of the laser generator (4) and transmit the data to the control system. The control system receives the signal from the power sensor (3) and compares the actual output power with the preset power value. By continuously adjusting the control signal, the output power of the laser generator is stabilized at the preset value that meets the processing requirements.

9. The automatic focusing laser bag opening machine for clothing according to claim 8, characterized in that, The control signal u(t) adopts a proportional-integral-derivative (PID) control algorithm, and its basic control law formula is as follows: where u is the output of the controller, that is, the control signal for adjusting the power of the laser generator (4); K p is the proportionality coefficient, T i is the integral time constant, T d is the derivative time constant; e(t) is the deviation value between the current actual power and the preset power.

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