Clothing button sewing hole marking-free positioning device

Abstract

The invention is suitable for the field of garment processing equipment, and provides a garment button sewing and buttonhole marking-free positioning device. Comprising a machine head for processing a sewing button or a lock hole of a garment, a laser head for providing a positioning reference, a sliding rod horizontally connected to the outer side wall of the machine head, a walking assembly for driving the laser head to move along the sliding rod, a workbench provided with a strip-shaped sliding groove, a sliding block matched with the sliding groove in a sliding mode, and a fixing assembly for fixing the garment. The system further comprises a triple cooperation module for positioning precision optimization, and the triple cooperation module comprises a laser positioning deviation compensation module, a fabric dynamic adaptation adjustment module and a batch processing parameter self-optimization module. According to the method, the static positioning precision is stably improved, and manual calibration dependence is reduced; the dynamic adaptability of the fabric is enhanced, and processing of multiple types of fabrics is covered; and batch machining parameters are self-optimized, and the standard production level is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of garment processing equipment, and particularly relates to a garment buttonhole eye positioning device without point marking. BACKGROUND

[0002] The existing garment buttonhole eye positioning device without point marking (such as CN218043921U) replaces the traditional point marking with laser point positioning, thereby reducing the processing procedures. However, in actual application, the positioning accuracy is easily disturbed by multiple factors, and the core problems are concentrated in the following three points, which directly affect the straightness and processing quality of the buttonhole eye.

[0003] Hardware static deviation disturbs the positioning accuracy: the coaxial error during installation of the laser head, the flatness deformation of the workbench after long-term use, the slight axial movement of the slide rod and other hardware factors can cause static deviation of the distance between the laser point P and the intersection Q; the existing device has no deviation compensation mechanism and needs to be manually calibrated repeatedly, which not only increases the operation steps, but also depends on the manual experience for calibration accuracy, so it is difficult to stably control the positioning accuracy and is easy to cause inconsistent distances between the buttonhole eyes.

[0004] Dynamic deformation of the fabric causes the positioning deviation: when processing fabrics of different thicknesses (such as thin silk and thick wool) or elasticity (such as knitting and weaving), the preset processing position is easy to deviate from the straight line PQ due to the influence of stretching, shrinking or slipping of the fabric; the pressing force of the existing fixed components (such as bar magnets and fixed pressure strips) cannot be adjusted, the thick fabric is easy to loosen, the thin fabric is easy to break, and the positioning deviation caused by real-time correction of the fabric deformation cannot be corrected, so the buttonhole eye is easy to deviate from the straightness.

[0005] Poor consistency of batch processing parameters: when processing different batches or similar fabrics in batches, the laser positioning distance and the pressing force of the fixed components need to be adjusted manually according to the fabric state; the existing device has no historical data storage and parameter optimization mechanism, and the parameter adjustment depends on manual trial and error, which not only takes a long time, but also the parameters adjusted by different operators are different, resulting in inconsistent accuracy of the buttonhole eyes in batch processing, high risk of defective products, and difficulty in meeting the standardized production requirements.

[0006] Therefore, a garment buttonhole eye positioning device without point marking is needed to solve the above problems. SUMMARY

[0007] The purpose of the embodiment of the application is to provide a garment buttonhole eye positioning device without point marking to solve the problems raised in the background.

[0008] To achieve the above purpose, the application provides the following technical scheme:

[0009] The application discloses a device for positioning without marking points for button or eyelet of clothes, which comprises a machine head for processing button or eyelet of clothes, a laser head for providing positioning reference, a slide bar horizontally connected to the outer wall of the machine head, a walking assembly for driving the laser head to move along the slide bar, a workbench provided with a strip-shaped slide groove, a slide block slidingly matched with the slide groove, and a fixing assembly for fixing the clothes.

[0010] The device further comprises a triple coordination module for optimizing positioning accuracy, which comprises a laser positioning deviation compensation module, a fabric dynamic adaptation adjustment module and a batch processing parameter self-optimization module.

[0011] The laser positioning deviation compensation module is electrically connected with a deviation detection unit for collecting hardware deviation and a driving unit of the walking assembly, and is used for correcting the static deviation of the hardware.

[0012] The fabric dynamic adaptation adjustment module is electrically connected with a fabric state detection unit for collecting fabric state and a pressure adjustment unit of the fixing assembly, and is used for correcting the dynamic deformation deviation of the fabric.

[0013] The batch processing parameter self-optimization module is electrically connected with a data storage unit for storing processing data, the laser positioning deviation compensation module and the fabric dynamic adaptation adjustment module, and is used for optimizing batch processing parameters.

[0014] The distance between the laser point P emitted by the laser head and the intersection Q of the center line extension of the button or eyelet needle of the machine head to the workbench top is equal to the interval of the adjacent two buttons or eyelets.

[0015] The length direction of the slide groove is parallel to the axial direction of the slide bar, and the fixing assembly is arranged on the slide block.

[0016] By arranging the above structure, the original device advantage of positioning without marking points is retained, the core problem of positioning accuracy interference is solved through module coordination, the buttons or eyelets are ensured to be distributed along a straight line, the batch processing demand is adapted, the manual adjustment steps are reduced, and the processing efficiency and quality stability are improved.

[0017] In a further technical scheme, the laser positioning deviation compensation module comprises a deviation detection unit, a deviation processing unit and a compensation execution unit.

[0018] The deviation detection unit comprises a laser displacement sensor arranged on the side of the laser head and used for detecting the distance deviation between the laser head and the workbench top, and an inclination sensor arranged on the bottom of the workbench and used for detecting the horizontal deviation of the workbench.

[0019] The deviation processing unit is a micro control unit (MCU) integrated with a data fusion algorithm and is electrically connected with the laser displacement sensor and the inclination sensor.

[0020] The compensation execution unit is the drive unit of the walking component and is electrically connected to the deviation processing unit. The drive unit can drive the laser head to move along the slide bar to compensate for the deviation.

[0021] By collecting key hardware deviation data through dual sensors, blind spots in single sensor detection are avoided. The deviation processing unit fuses data based on algorithms to ensure accurate deviation calculation. The compensation execution unit adjusts the laser head position in real time to eliminate static interference such as hardware installation errors and table deformation, thereby improving the stability of positioning accuracy and eliminating the need for repeated manual calibration.

[0022] A further technical solution is that the data fusion algorithm of the deviation processing unit is a least squares deviation fitting algorithm, and the algorithm formula is:

[0023] ;

[0024] In the formula, This represents the axial displacement that the laser head needs to compensate for. For the first The weighting coefficients for the data collected by each sensor (set according to the sensor detection accuracy). For the first The deviation values ​​collected by each sensor (the spacing deviation collected by the laser displacement sensor or the levelness conversion deviation collected by the tilt sensor). Number of sensors (in this device) );

[0025] The least squares method can effectively reduce the impact of data fluctuations from a single sensor. By using weighting coefficients to differentiate the detection priorities of different sensors, it ensures that the deviation calculation results are more consistent with the actual hardware state, accurately compensates for displacement, further reduces the interference of hardware static deviations on positioning accuracy, and improves the stability of the distance between laser point P and intersection point Q.

[0026] A further technical solution is that the fabric dynamic adaptation and adjustment module includes a fabric state detection unit, a dynamic processing unit, and an adaptation execution unit.

[0027] The fabric condition detection unit includes a tension sensor disposed on the edge of the fixing component for detecting the tensile tension of the garment, and a pressure sensor disposed on the bottom of the pressure strip of the fixing component for detecting the pressing force of the pressure strip on the garment.

[0028] The dynamic processing unit is a programmable logic controller (PLC) with an integrated PID adaptive algorithm, which is electrically connected to the tension sensor and the pressure sensor respectively.

[0029] The adapter is a pressure regulating unit with a fixed component, which is electrically connected to the dynamic processing unit. The pressure regulating unit can adjust the clamping force of the pressure strip on the garment.

[0030] Real-time acquisition of fabric tension and compression force data, dynamic processing unit through algorithm correlation between the two, adaptive execution unit as needed to adjust the compression force, to avoid the fabric due to stretching / shrinking caused by processing site deviation, while preventing thick fabric fixed not firm, thin fabric under pressure damage problem, improve the adaptability of the device to different materials, thickness of fabric, ensure the stability of the fabric position during processing.

[0031] Further technical solutions, the PID adaptive algorithm formula of the dynamic processing unit is:

[0032] ;

[0033] In the formula, is the output control quantity of the pressure regulating unit (the driving signal for adjusting the compression force), is the proportional coefficient (reflecting the adjustment intensity of the current deviation), is the deviation value of the current compression force and the target compression force (the target compression force is set according to the fabric tension), is the integral time constant (adjustment parameter to eliminate static deviation), is the differential time constant (adjustment parameter to predict the deviation trend), is the adjustment time;

[0034] PID algorithm has real-time response and deviation correction capability, proportional coefficient ensures fast adjustment of current deviation, integral term eliminates long-term static deviation, differential term predicts deviation change, avoids adjustment overshoot, makes the compression force always match the fabric tension, dynamically corrects the positioning deviation caused by fabric deformation, ensures that the processing site always fits the straight line PQ, and improves the straightness of the buttonhole lock eye.

[0035] Further technical solutions, the batch processing parameter self-optimization module includes a data storage unit, a parameter analysis unit and a parameter optimization unit;

[0036] The data storage unit is an industrial database, used to store the fabric type, fabric thickness, laser positioning compensation amount, PID algorithm parameters and positioning accuracy correlation data of each batch processing;

[0037] The parameter analysis unit is an edge computing module integrated with gradient descent algorithm, electrically connected with the data storage unit, used to analyze historical data to identify parameter optimization direction;

[0038] The parameter optimization unit is a parameter output interface, electrically connected with the parameter analysis unit, laser positioning deviation compensation module and fabric dynamic adaptive adjustment module, used to issue the optimized parameters to the corresponding modules;

[0039] Through the accumulation of historical processing data in the database, repeated manual trial and error adjustment during batch processing is avoided. The edge computing module automatically outputs optimized parameters based on the algorithm mining of the correlation between parameters and precision, ensuring the consistency of processing parameters for different batches of the same fabric, reducing the risk of defective products during batch processing, and improving the efficiency of standardized production.

[0040] In a further aspect, the gradient descent optimization algorithm formula of the parameter analysis unit is:

[0041] ;

[0042] In the formula, is the optimized nth parameter (such as the weight coefficient of laser positioning deviation compensation , PID algorithm / / / ), is the (n-1)th parameter before optimization, is the learning rate (controls the iteration step size of the parameter to avoid excessive step size leading to oscillation or small step size leading to slow optimization), is the error function gradient corresponding to the nth parameter (reflecting the influence direction of parameter change on positioning accuracy error), is the positioning accuracy error function (constructed based on the difference between actual processing accuracy and target accuracy); The gradient descent algorithm can efficiently find the optimal parameter combination, clearly adjust the parameter direction through the error function gradient, control the iteration stability through the learning rate, ensure the convergence of the parameter optimization process, avoid the subjectivity and randomness of manual adjustment, keep the batch processing parameters in the optimal state, and improve the consistency and precision stability of different batches of processing.

[0043] In a further aspect, the fixed assembly includes a fixed plate connected to the sliding block and a pressing strip for pressing the garment;

[0044] A relief groove is formed on the fixed plate for avoiding the pin buckle eyelet needle, and the axis of the relief groove is in the same vertical plane as the straight line PQ;

[0045] The pressing strip is arranged above the fixed plate and connected to the adaptive execution unit of the fabric dynamic adaptive adjustment module;

[0046] The side wall of the fixed plate is provided with a handle for facilitating the pushing of the sliding block;

[0047] The side wall of the fixed plate is provided with a handle for facilitating the pushing of the sliding block;

[0048] ​The gap ensures that there is no part interference during buttonhole and lock eye needle processing, and ensures smooth processing; the pressing strip is linked with the dynamic adaptive module to realize self-adaptive adjustment of the pressing force; the handle facilitates manual pushing of the sliding block along the sliding groove, ensures that the processed button / lock eye and the laser point P are quickly aligned, improves the single processing switching efficiency, and cooperates with the guide of the sliding block and the sliding groove to further ensure that the movement trajectory of the garment is in line with the straight line, and improves the straightness of the button / lock eye.

[0049] Further technical solutions, the walking assembly includes a sleeve, an electric push rod and a driving unit, the sleeve is sleeved on the sliding rod and can slide axially along the sliding rod, the laser head is vertically fixed at the bottom of the sleeve through bolts, and the laser emission direction of the laser head is vertically directed to the workbench top; the movable end of the electric push rod is connected with the sleeve, and the driving unit is electrically connected with the electric push rod and used for driving the electric push rod to operate.

[0050] Compared with the prior art, the beneficial effects of the present application are:

[0051] In the present application, the static positioning accuracy is stably improved, and the dependence on manual calibration is reduced: through the double-sensor data acquisition and least square method algorithm of the laser positioning deviation compensation module, the hardware static deviation such as laser head installation error and workbench deformation is eliminated, the stability of the distance between the laser point P and the intersection Q is significantly improved, manual repeated calibration is not required, the technical threshold of the operator is reduced, the precision fluctuation of manual calibration is avoided, the distance accuracy of each positioning is ensured to be consistent, and a foundation is laid for the straight-line distribution of the button / lock eye;

[0052] In the present application, the dynamic adaptability of the fabric is enhanced, and multiple types of fabric processing are covered: through the tension-pressure linkage detection and PID algorithm of the fabric dynamic adaptive adjustment module, the pressing force can be dynamically adjusted according to the real-time tension of the fabric, the problem of poor fixing of thick fabric (such as woolen coat) is solved, the problem of damage of thin fabric (such as silk shirt) caused by pressure is avoided, the positioning deviation caused by real-time correction of fabric stretching / shrinking is avoided, the preset processing position of the fabric is ensured to be always in line with the straight line PQ during the processing process, and the straightness accuracy of the button / lock eye is further improved.

[0053] In the present application, the batch processing parameters are self-optimized, and the standardization production level is improved: through the historical data storage and gradient descent algorithm of the batch processing parameter self-optimization module, manual trial and error adjustment of parameters is not required during batch processing, the module automatically outputs the optimal laser compensation amount, PID parameters and the like based on historical processing data, the consistency of processing parameters of different batches and similar fabrics is ensured, the risk of defective products in batch processing is reduced, the parameter adjustment time is shortened, and the efficiency and stability of large-scale production are improved.

[0054] In order to more clearly illustrate the structural features and effects of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 is a structural schematic diagram of the invention from the front perspective;

[0056] Figure 2 is a structural schematic diagram of the invention from the side perspective;

[0057] Figure 3 is a flowchart of the triple synergy module of the invention;

[0058] Figure 4 is a flowchart of the laser positioning deviation compensation module of the invention;

[0059] Figure 5 is a flowchart of the deviation detection unit of the invention;

[0060] Figure 6 is a flowchart of the fabric dynamic adaptive adjustment module of the invention;

[0061] Figure 7 is a flowchart of the fabric state detection unit of the invention;

[0062] Figure 8 is a flowchart of the batch processing parameter self-optimization module of the invention;

[0063] Figure 9 is a connection diagram of the laser positioning deviation compensation module of the invention;

[0064] Figure 10 is a connection diagram of the fabric dynamic adaptive adjustment module of the invention;

[0065] Figure 11 is a connection diagram of the batch processing parameter self-optimization module of the invention.

[0066] In the figure: 1, head; 2, laser head; 3, slide bar; 4, walking assembly; 41, driving unit; 42, sleeve; 43, electric push rod; 5, workbench; 51, sliding groove; 6, sliding block; 7, fixed assembly; 71, pressure adjusting unit; 72, pressing strip; 73, fixed plate; 731, accommodation slot; 732, handle; 8, laser positioning deviation compensation module; 81, deviation detection unit; 811, laser displacement sensor; 812, inclination sensor; 82, deviation processing unit; 83, compensation execution unit; 9, fabric dynamic adaptive adjustment module; 91, fabric state detection unit; 911, tension sensor; 912, pressure sensor; 92, dynamic processing unit; 93, adaptive execution unit; 10, batch processing parameter self-optimization module; 101, data storage unit; 102, parameter analysis unit; 103, parameter optimization unit. DETAILED DESCRIPTION

[0067] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0068] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0069] Example 1

[0070] like Figures 1-11 As shown, this embodiment of the invention provides a non-marking positioning device for garment buttonholes, including a machine head 1, a laser head 2, a slide bar 3, a walking assembly 4, a worktable 5, a slider 6, a fixing assembly 7, and a laser positioning deviation compensation module 8;

[0071] The machine head 1 is an existing button and buttonhole sewing machine head, which is fixed on the bracket above the workbench 5 and is used to perform button or buttonhole sewing on clothing.

[0072] The slide bar 3 is made of stainless steel with a circular cross-section. It is horizontally welded to the outer wall of the machine head 1, and the axis of the slide bar 3 is parallel to the table surface of the worktable 5.

[0073] The walking assembly 4 includes a sleeve 42, an electric push rod 43, and a drive unit 41. The sleeve 42 is made of aluminum alloy and is sleeved on the slide rod 3, allowing it to slide along the axis of the slide rod 3. The laser head 2 is a 650nm red laser module, which is vertically fixed to the bottom of the sleeve 42 by bolts. The laser emission direction of the laser head 2 is perpendicular to the surface of the worktable 5. The movable end of the electric push rod 43 is connected to the sleeve 42, and the drive unit 41 is electrically connected to the electric push rod 43 to drive the electric push rod 43 to work.

[0074] The workbench 5 is made of cast iron with a flat surface and a strip groove 51. The length of the groove 51 is parallel to the axis of the slide rod 3. The slider 6 is made of nylon and slides within the groove 51.

[0075] The fixing component 7 includes a fixing plate 73 and a bar magnet. The fixing plate 73 is made of iron and is fixed to the top of the slider 6 by bolts. The fixing plate 73 has a relief groove 731. The axis of the relief groove 731 is in the same vertical plane as the straight line PQ. The bar magnet is attracted to the upper surface of the fixing plate 73 for fixing the clothing.

[0076] The deviation detection unit 81 of the laser positioning deviation compensation module 8 includes a laser displacement sensor 811 and a tilt sensor 812. The laser displacement sensor 811 is a KEYENCEIL-600 model, which is fixed to the side of the laser head 2 by a bracket. The detection direction is perpendicular to the worktable 5 surface and is used to collect the distance deviation between the laser head 2 and the worktable surface.

[0077] The inclination sensor 812 is of the MPU6050 type, is fixed to the bottom of the workbench 5 by a screw, and is used to collect the level deviation of the workbench 5.

[0078] The deviation processing unit 82 is an STM32F407 type MCU, and is electrically connected with the laser displacement sensor 811 and the inclination sensor 812 through wires.

[0079] The compensation execution unit 83 is the driving unit 41 of the walking assembly 4, and is electrically connected with the deviation processing unit 82.

[0080] In this embodiment, the laser positioning deviation compensation module 8 works in real time: the laser displacement sensor 811 collects the spacing deviation between the laser head 2 and the table top , the inclination sensor 812 collects the level deviation of the workbench 5 and converts it into the axial deviation of the laser head 2 , the MCU calculates the compensation displacement according to the least square method algorithm , wherein ,the weights are set according to the detection accuracy of the two sensors , the driving unit 41 drives the electric push rod 43 to extend and retract, so that the laser head 2 moves along the slide rod 3 , and the deviation compensation is completed.

[0081] When processing pure cotton shirts (the preset spacing between the buttons is the center distance between the adjacent buttons), the hardware static deviation is compensated in real time, the distance between the laser point P and the intersection Q is always consistent with the preset spacing, manual calibration is not required, the operator only needs to fix the garment and push the slide block 6 to align the processed button with the laser point P, and then the positioning of the next button can be completed, the positioning accuracy is stable, the buttons are distributed along a straight line, and the spacing misalignment problem of the buttons caused by the hardware deviation of the existing device is avoided.

[0082] Embodiment 2

[0083] The difference between this embodiment and embodiment 1 is that the bar magnet of the fixing assembly 7 is removed, the fixing assembly 7 is replaced by a dynamically adjustable pressure structure, and a fabric dynamic adaptive adjustment module 9 is added; the dynamically adjustable pressure structure of the fixing assembly 7 includes a fixed plate 73, a pressing strip 72 and a pressure adjusting unit 71, the pressing strip 72 is made of rubber and is arranged above the fixed plate 73, the pressure adjusting unit 71 is an FAULHABER2332 type electric adjusting screw, is fixed to the two sides of the fixed plate 73 through a support, the lower end of the electric adjusting screw is connected with the top of the pressing strip 72, and the electric adjusting screw can drive the pressing strip 72 to move in the vertical direction to adjust the pressing force.

[0084] The fabric state detection unit 91 of the fabric dynamic adaptive adjustment module 9 comprises a tension sensor 911 and a pressure sensor 912. The tension sensor 911 is of the model HBMU9C, is fixed to the edge of the fixed plate 73 through a clamp, and is connected to the edge of the garment through a detection end, and is used for collecting the tensile force of the garment.

[0085] The pressure sensor 912 is of the model FUTEKLCM300, is pasted to the bottom of the pressing strip 72, and is used for collecting the pressing force of the pressing strip 72 on the garment.

[0086] The dynamic processing unit 92 is a Siemens S7-1200 type PLC, and is electrically connected with the tension sensor 911 and the pressure sensor 912 through wires.

[0087] The adaptive execution unit 93 is the pressure adjustment unit 71 of the fixed assembly 7, and is electrically connected with the dynamic processing unit 92. The PLC integrates a PID self-adaptive algorithm.

[0088] In this embodiment, the fabric dynamic adaptive adjustment module 9 and the laser positioning deviation compensation module 8 work cooperatively. The tension sensor 911 collects the tensile force of the garment in real time, the pressure sensor 912 collects the pressing force of the pressing strip 72, the PLC calculates the deviation between the current pressing force and the target pressing force (the target pressing force is set according to the fabric tension, and the greater the tension, the greater the target pressing force), calculates the control amount by the PID algorithm , , , , and drives the electric adjustment screw of the pressure adjustment unit (71) to operate, so as to adjust the pressing force of the pressing strip (72).

[0089] When processing thick woolen coats, the tensile force of the garment increases, is a positive value, the PLC outputs an increased , the electric adjustment screw pushes the pressing strip 72 downward, and the pressing force is increased, so as to prevent the garment from being displaced.

[0090] When processing thin silk shirts, the tensile force of the garment is small, is close to zero, and the pressing force is kept in a small range, so as to avoid damage to the silk.

[0091] During the whole processing process, the positioning deviation caused by the deformation of the fabric is corrected in real time, the straightness accuracy of the buttonhole is further improved compared with embodiment 1, and the processing flexibility and efficiency are improved without manual switching of the fabric adjustment pressure parameter.

[0092] Embodiment 3

[0093] The difference between this embodiment and embodiment 2 is that a batch processing parameter self-optimization module 10 is added.

[0094] The data storage unit 101 of the batch processing parameter self-optimization module 10 is a MySQL industrial database installed in an industrial computer and electrically connected with the deviation processing unit 82 of the laser positioning deviation compensation module 8 and the dynamic processing unit 92 of the fabric dynamic adaptive adjustment module 9 through Ethernet respectively, for storing the fabric type (such as pure cotton, wool and silk), fabric thickness, laser positioning compensation amount , PID algorithm parameters , , and positioning accuracy correlation data of each batch processing.

[0095] The parameter analysis unit 102 is an NVIDIA Jetson Nano type edge computing module electrically connected with the data storage unit 101 through wires and integrated with a gradient descent optimization algorithm.

[0096] The parameter optimization unit 103 is an RS485 communication interface electrically connected with the parameter analysis unit 102, the deviation processing unit 82 and the dynamic processing unit 92 through wires, for issuing the optimized parameters to the corresponding modules.

[0097] In this embodiment, the three modules work together: before batch processing, the parameter optimization unit 103 calls the historical processing data of the same type of fabric from the data storage unit 101, the parameter analysis unit 102 optimizes the parameters (such as the weight coefficient of laser positioning , the PID , , , the PID , , ) through the gradient descent algorithm (learning rate ) and issues them to the deviation processing unit 82 and the dynamic processing unit 92 through the parameter optimization unit 103.

[0098] During processing, the laser positioning deviation compensation module 8 and the fabric dynamic adaptive adjustment module 9 work based on the optimized parameters, and the positioning accuracy and adaptability are further improved.

[0099] After processing, the parameters and accuracy data of this processing are stored in the data storage unit 101, providing a basis for subsequent batch optimization.

[0100] When processing pure cotton shirts in batches, the module automatically calls and optimizes the historical parameters, without the need for manual debugging, and the consistency of button spacing in different batches is significantly improved. The operator only needs to complete the clothing fixing and slider pushing, and the processing efficiency and standardization level are greatly improved compared with embodiment 2, meeting the large-scale production demand.

[0101] The working principle and use process of the application are as follows:

[0102] Pre-processing stage: parameter initialization and hardware calibration;

[0103] After starting the device, the batch processing parameter self-optimization module 10 automatically detects the type of fabric to be processed (manual input or assisted confirmation by the fabric recognition module), and calls the historical processing data of the same type of fabric from the data storage unit 101; if it is the first time to process this type of fabric, the module loads the default initial parameters (laser positioning weight coefficient 、 , PID parameters 、 、 ), and issues them to the laser positioning deviation compensation module 8 and the fabric dynamic adaptation adjustment module 9;

[0104] The laser positioning deviation compensation module 8 starts self-checking: the laser displacement sensor 811 collects the initial distance between the laser head 2 and the table surface of the workbench 5, the inclination sensor 812 collects the initial levelness of the workbench 5, the deviation processing unit 82 calculates the initial static deviation, the drive unit 41 drives the laser head 2 to move along the slide rod 3, and the initial hardware calibration is completed, ensuring that the initial distance between the laser point P and the intersection Q is equal to the preset distance of the buckle / lock eye to be processed;

[0105] Garment fixing stage: dynamic adaptation fixing;

[0106] Lay the garment to be processed on the fixing plate 73, ensuring that the garment preset processing line is aligned with the axis of the accommodation slot 731 (manual alignment or assisted confirmation by fabric positioning marks); pull the handle 732 to move the sliding block 6 along the sliding groove 51, and preliminarily adjust the garment position to align the first preset processing position with the top of the intersection Q;

[0107] Start the fabric dynamic adaptation adjustment module 9: the tension sensor 911 collects the initial tension of the garment, the dynamic processing unit 92 sets the target compression force according to the initial tension, and the pressure adjustment unit 71 of the adaptive execution unit 93 drives the pressure strip 72 to move downward until the compression force detected by the pressure sensor 912 reaches the target value, completing the garment fixing; During the fixing process, the pressure is real-time feedback to ensure that the compression force is moderate, avoiding fabric damage or loosening;

[0108] Processing stage: real-time positioning compensation and dynamic adaptation;

[0109] Positioning Confirmation: Laser head 2 emits a laser to form a laser point P on the garment surface; after confirming that the first preset processing position is aligned with the intersection point Q, the machine head 1 is started to perform button or buttonhole processing at the intersection point Q; during the processing, the laser positioning deviation compensation module 8 works continuously: the laser displacement sensor 811 and the tilt sensor 812 collect deviation data in real time, the deviation processing unit 82 calculates the compensation amount through the least squares algorithm, and the drive unit 41 finely adjusts the position of the laser head 2 to ensure that the distance between the laser point P and the intersection point Q remains stable.

[0110] Dynamic adaptation: During processing, the fabric may stretch or shrink due to the processing force of the machine head 1 or its own elasticity; the tension sensor 911 detects the changes in fabric tension in real time, and the dynamic processing unit 92 calculates the corresponding clamping force deviation. The control quantity is output through the PID algorithm. The pressure regulating unit 71 adjusts the clamping force of the pressure strip 72 in real time to correct the positioning offset caused by fabric deformation and ensure that the processing position always fits the intersection point Q.

[0111] Processing switch: After the first button / buttonhole is processed, pull handle 732 to push slider 6 along slide groove 51 to align the processed button / buttonhole with laser point P; at this time, the position of intersection point Q is the next processing position. Repeat the above positioning confirmation and processing steps until all processing positions of the garment are completed.

[0112] Batch optimization phase: parameter iteration and storage;

[0113] After a single garment is processed, the device automatically records the key data of this processing: fabric thickness, laser positioning compensation amount. PID parameters ( , , ), positioning accuracy data (such as the deviation between the actual distance and the preset distance), and store them in the data storage unit (101) of the batch processing parameter self-optimization module (10).

[0114] After a batch (e.g., 100 pieces) of the same type of fabric is completed, the batch processing parameter self-optimization module 10 initiates parameter optimization: the parameter analysis unit 102 calls up all the processing data of the batch and calculates the gradient of the parameter error function using the gradient descent algorithm. Iteratively update parameters (e.g., adjusting the laser positioning weight coefficient) (or PID parameters), generating the optimized first... The parameters are replaced and stored in the data storage unit 101;

[0115] When entering the next batch processing, the module directly calls the optimized parameters, without the need for manual re-debugging, realizing self-iterative optimization of batch parameters, and gradually improving positioning accuracy and processing efficiency with the increase of batches;

[0116] Tail phase: device reset and data backup;

[0117] After all the garment processing is completed, the machine head 1 and the laser head 2 are closed; the fabric dynamic adaptive adjustment module 9 drives the pressing strip 72 to move upwards, loosens the garment, and takes down the processed garment;

[0118] The batch processing parameter self-optimization module 10 automatically backs up the processing data in the data storage unit 101 (local backup and cloud backup are optional), preventing data loss; the laser positioning deviation compensation module 8 drives the laser head 2 to reset to the initial position, and the device enters the standby state, waiting for the next processing;

[0119] In the whole working process, the three modules are progressive: the laser positioning deviation compensation module ensures the hardware static accuracy, the fabric dynamic adaptive adjustment module corrects the fabric dynamic deformation, and the batch processing parameter self-optimization module improves the batch consistency, all of which solve the core problem of positioning accuracy being easily disturbed, realizing high precision, high stability and high standardization of point-free positioning.

[0120] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A non-marking positioning device for sewing buttons and buttonholes in clothing, comprising a machine head (1) for sewing buttons or buttonholes in clothing, a laser head (2) for providing positioning reference, a slide bar (3) horizontally connected to the outer wall of the machine head (1), a walking assembly (4) for driving the laser head (2) to move along the slide bar (3), a worktable (5) with a strip groove (51), a slider (6) adapted to the groove (51), and a fixing assembly (7) for fixing clothing, characterized in that: It also includes a triple synergy module around the positioning accuracy optimization, which includes a laser positioning deviation compensation module (8), a fabric dynamic adaptive adjustment module (9) and a batch processing parameter self-optimization module (10); The laser positioning deviation compensation module (8) is electrically connected with the deviation detection unit (81) for collecting hardware deviation and the driving unit (41) of the walking assembly (4) for correcting the hardware static deviation; The fabric dynamic adaptive adjustment module (9) is electrically connected with the fabric state detection unit (91) for collecting fabric state and the pressure adjustment unit (71) of the fixing assembly (7) for correcting the fabric dynamic deformation deviation; The batch processing parameter self-optimization module (10) is electrically connected with the data storage unit (101) for storing processing data, the laser positioning deviation compensation module (8) and the fabric dynamic adaptive adjustment module (9) for optimizing batch processing parameters; The distance between the laser point P emitted by the laser head (2) and the intersection Q of the center line extension of the button lock eye needle of the machine head (1) to the table surface of the workbench (5) is equal to the spacing of the adjacent two buttons or lock eyes; The length direction of the sliding groove (51) is parallel to the axial direction of the sliding rod (3), and the fixing assembly (7) is arranged on the sliding block (6).

2. The garment buttonhole mark placement device of claim 1, wherein: The laser positioning deviation compensation module (8) includes a deviation detection unit (81), a deviation processing unit (82) and a compensation execution unit (83); The deviation detection unit (81) includes a laser displacement sensor (811) arranged on the side of the laser head (2) for detecting the distance deviation between the laser head (2) and the table surface of the workbench (5), and an inclination sensor (812) arranged at the bottom of the workbench (5) for detecting the horizontal deviation of the workbench (5); The deviation processing unit (82) is a micro control unit (MCU) integrated with a data fusion algorithm, which is electrically connected with the laser displacement sensor (811) and the inclination sensor (812); The compensation execution unit (83) is the driving unit (41) of the walking assembly (4), which is electrically connected with the deviation processing unit (82), and the driving unit (41) can drive the laser head (2) to move along the sliding rod (3) to compensate the deviation.

3. The garment buttonhole mark placement device of claim 2, wherein: The data fusion algorithm of the deviation processing unit (82) is a least square deviation fitting algorithm, and the algorithm formula is: ； In the formula, The axial displacement amount to be compensated for the laser head (2), The weight coefficient of the first sensor to collect data (set according to the detection accuracy of the sensor), The deviation value collected by the first sensor (the interval deviation collected by the laser displacement sensor or the conversion deviation of the levelness collected by the inclination sensor), The number of sensors (the number of sensors in the device ).

4. The garment buttonhole mark placement device of claim 1, wherein: The fabric dynamic adaptive adjustment module (9) includes a fabric state detection unit (91), a dynamic processing unit (92) and an adaptive execution unit (93); The fabric state detection unit (91) includes a tension sensor (911) arranged at the edge of the fixing assembly (7) for detecting the tensile force of the garment, and a pressure sensor (912) arranged at the bottom of the pressing strip (72) of the fixing assembly (7) for detecting the pressing force of the pressing strip (72) on the garment; The dynamic processing unit (92) is a programmable logic controller (PLC) integrated with a PID adaptive algorithm, which is electrically connected with the tension sensor (911) and the pressure sensor (912); The adaptive execution unit (93) is a pressure adjusting unit (71) of the fixed assembly (7), and is electrically connected with the dynamic processing unit (92). The pressure adjusting unit (71) can adjust the pressing force of the pressing strip (72) on the garment.

5. The garment buttonhole mark placement device of claim 4, wherein: The PID adaptive algorithm formula of the dynamic processing unit (92) is as follows: ； In the formula, is an output control quantity (a driving signal for adjusting the pressing force) of the pressure regulating unit (71), is a proportional coefficient (a regulation degree reflecting the current deviation), is a deviation value of the current pressing force from the target pressing force (the target pressing force is set according to the fabric tension), is an integral time constant (a regulation parameter for eliminating static deviation), is a differential time constant (a regulation parameter for predicting the deviation trend), is a regulation time.

6. The garment buttonhole mark placement device of claim 1, wherein: The batch processing parameter self-optimization module (10) comprises a data storage unit (101), a parameter analysis unit (102) and a parameter optimization unit (103). The data storage unit (101) is an industrial database, which is used for storing the fabric type, fabric thickness, laser positioning compensation amount, PID algorithm parameter and positioning accuracy associated data of each batch processing. The parameter analysis unit (102) is an edge computing module integrated with a gradient descent algorithm, which is electrically connected with the data storage unit (101) and is used for analyzing historical data to identify the parameter optimization direction. The parameter optimization unit (103) is a parameter output interface, which is electrically connected with the parameter analysis unit (102), the laser positioning deviation compensation module (8) and the fabric dynamic adaptive adjustment module (9), and is used for issuing the optimized parameters to the corresponding modules.

7. The garment buttonhole mark placement device of claim 6, wherein: The gradient descent optimization algorithm formula of the parameter analysis unit (102) is as follows: ； In the formula, For the optimized first Substitute parameters (such as the weighting coefficient for laser positioning deviation compensation) PID algorithm / / ), For the first time before optimization Substitute parameters, The learning rate (controls the iteration step size, avoiding oscillations caused by an excessively large step size or slow optimization caused by an excessively small step size). For the first The gradient of the error function corresponding to the parameters (reflecting the direction of the influence of parameter changes on positioning accuracy error). This is the positioning accuracy error function (constructed based on the difference between the actual machining accuracy and the target accuracy).

8. The garment buttonhole mark placement device of claim 1, wherein: The fixed assembly (7) comprises a fixed plate (73) connected with the sliding block (6) and a pressing strip (72) used for pressing the garment. The fixed plate (73) is provided with a clearance groove (731) for avoiding the buttonhole needle, and the axis of the clearance groove (731) is in the same vertical plane as the straight line PQ. The pressing strip (72) is arranged above the fixed plate (73) and is connected with the adaptive execution unit (93) of the fabric dynamic adaptive adjustment module (9). The side wall of the fixed plate (73) is provided with a handle (732) for facilitating the pushing of the sliding block (6).

9. The garment buttonhole mark placement device of claim 1, wherein: The walking assembly (4) comprises a sleeve (42), an electric push rod (43) and a driving unit (41). The sleeve (42) is sleeved on the sliding rod (3) and can slide axially along the sliding rod (3). The laser head (2) is vertically fixed at the bottom of the sleeve (42) by bolts, and the laser emission direction of the laser head (2) is perpendicular to the workbench (5) table surface. The movable end of the electric push rod (43) is connected with the sleeve (42), and the driving unit (41) is electrically connected with the electric push rod (43) and is used for driving the operation of the electric push rod (43).

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