Laser detection device of cloth inspecting machine

Abstract

The invention discloses a laser detection device of a cloth inspecting machine, and relates to the field of auxiliary equipment of textile machinery. Comprising a laser detection module, a linkage control module and an execution mechanism. The laser detection module adopts a non-contact laser ranging technology, detects the roll diameter of a cloth roll in real time and transmits data; the linkage control module is in linkage with the tension controller, the winding system and the servo deviation rectifying mechanism, operation parameters are adjusted, it is ensured that tension is stable, winding is flush, and when the winding diameter reaches a preset threshold value, an alarm is triggered. The execution mechanism optimizes the unwinding and winding structure, and damage and wrinkling of the cloth roll are avoided. The cloth inspecting machine solves the problems that in the prior art, manual observation efficiency is low, and contact type detection abrasion is large, has the advantages of being low in labor cost, high in operation efficiency, high in reliability and wide in application range, can be suitable for industrial cloth of various breadths and types, and effectively improves the comprehensive operation efficiency of the cloth inspecting machine.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of textile machinery auxiliary equipment, and particularly relates to a cloth inspecting machine laser detection device. BACKGROUND

[0002] The cloth inspecting machine is a key equipment for detecting the quality of fabric in the textile industry, and the monitoring of the remaining amount of the cloth roll in the cloth feeding link directly affects the continuity and efficiency of the cloth inspecting process. At present, there are mainly two ways to monitor the remaining amount of the cloth roll: one is the manual observation method, in which the cloth inspector needs to continuously pay attention to the remaining amount of the cloth roll behind and judge whether it is close to the critical state by the naked eye; the other is the contact type roll diameter sensor monitoring method, in which the sensor is installed at the end of the cloth roll shaft, and the roll diameter data is obtained by contact measurement and a warning is triggered.

[0003] The manual observation method has obvious defects: the cloth inspector needs to constantly pay attention to the cloth roll, which increases the operation burden and is easy to miss the best time to add the cloth due to fatigue or negligence, resulting in downtime and waiting, and reducing the efficiency of the equipment operation; in order to avoid omissions, two operators need to be equipped in some workshops, and the labor cost is significantly increased. The contact type roll diameter sensor also has disadvantages: it is easy to cause mechanical wear due to the rotation of the cloth roll, has a short service life, and needs to be replaced every 3-6 months on average; the measurement accuracy is greatly affected by the tightness of the cloth roll, and the error is large, so the warning reliability is insufficient; and it may cause contact damage to flexible cloth rolls, and is not suitable for sensitive industrial cloth. Therefore, a non-contact, high-precision, high-reliability and cloth roll diameter detection device that can be linked with the cloth inspecting machine system is needed to solve the problems existing in the prior art. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the present application is to provide a cloth inspecting machine laser detection device, which realizes non-contact high-precision roll diameter monitoring, is linked with each system of the cloth inspecting machine, reduces manual intervention, and improves the quality and efficiency of cloth inspection.

[0005] The present application provides the following technical solutions: A cloth inspecting machine laser detection device, comprising a laser detection module, a linkage control module and an execution mechanism, the laser detection module is signal connected with the linkage control module, and the linkage control module is drivingly connected with the execution mechanism; The laser detection module is used for non-contact real-time detection of the roll diameter data of the cloth roll, and the roll diameter data is transmitted to the linkage control module; The linkage control module is used for receiving the roll diameter data, adjusting the operating parameters of the execution mechanism according to the roll diameter data, and triggering an alarm action when the roll diameter data reaches a preset threshold; The execution mechanism is used for realizing the unwinding, winding and positioning adjustment of the cloth roll, ensuring the continuity and stability of the cloth inspection process; and the cloth inspecting machine system comprises a winding-off A-frame, a brake, an air cylinder, a guide roller, an operation main control screen, an alarm flash lamp, a tension controller, a positioning rod and a winding driven roller.

[0006] Preferably, the laser detection module adopts a laser range finder, the laser range finder constitutes a laser detection device, the wavelength of the laser range finder is 600-700 nm, the detection range is 50-1500 mm, and the detection accuracy is not less than ±0.5 mm.

[0007] Preferably, the laser detection device is installed on the side of the unwinding A-shaped frame of the cloth inspection machine and is at the same height as the cloth roll axis, and the laser emission direction is perpendicular to the cloth roll axis.

[0008] Preferably, the linkage control module includes a tension linkage unit, a winding linkage unit, and a deviation correction linkage unit. The tension linkage unit is signal-connected with the tension controller of the cloth inspection machine, is used for adjusting the unwinding speed according to the roll diameter data, and makes the unwinding tension fluctuation amount ≤±2%; The winding linkage unit is signal-connected with the winding drive roller drive system of the cloth inspection machine, is used for matching the winding speed; The deviation correction linkage unit is signal-connected with the servo deviation correction adjusting mechanism of the cloth inspection machine, is used for dynamically adjusting the positioning rod, and makes the winding flatness deviation ≤1 mm.

[0009] Preferably, the linkage control module further includes an alarm unit, the alarm unit includes an alarm flash lamp and an operation master control screen, when the roll diameter data reaches a preset threshold value, the alarm flash lamp starts, and the operation master control screen displays a warning information.

[0010] Preferably, the actuator includes an unwinding assembly and a winding assembly. The unwinding assembly is an unwinding A-shaped frame, adopts a center main unwinding mode, cooperates with a brake car and an air cylinder to realize stable unwinding, the winding assembly is configured with a web type expander roller and a rubber bending roller, can automatically switch according to the fabric type, and the winding assembly is transmission-matched with the winding drive roller.

[0011] Preferably, the linkage control module integrates a microcomputer control system, the microcomputer control system is integrated in the operation master control screen, and supports fabric width parameter preset, roll diameter threshold setting, data recording, and fault diagnosis functions.

[0012] Preferably, the device adapts to a fabric width range of 500-5400 mm, a maximum winding diameter of 1500 mm, a detection response time of ≤0.1 s, and realizes stable conveying of the cloth roll through a guide roller.

[0013] Preferably, the device is compatible with glass fiber cloth, chemical fiber cloth, and sensitive industrial cloth, has a winding flatness error of ≤1 mm, and guarantees the winding flatness through dynamic adjustment of the positioning rod.

[0014] Preferably, the device supports the operation of rewinding at any time, the tension remains stable during rewinding, and the rewinding action is realized through the cooperation of the center main unwinding structure of the A-shaped frame and the tension controller.

[0015] Compared with the prior art, the application has the following beneficial effects: The cloth inspecting machine laser detection device provided by the application has the following advantages: the labor cost is reduced: only one operator is needed for a single cloth inspecting machine, and a person does not need to guard the cloth roll, and 50% of labor investment is reduced; the efficiency is improved: the operator can focus on the cloth inspecting work without frequently paying attention to the cloth roll reserve during the operation process, and the effective operation time of a single cloth inspecting machine is increased by 15%-20%; the comprehensive efficiency of the equipment is optimized: the shutdown waiting caused by the exhaustion of the cloth roll is avoided through accurate early warning, and the comprehensive efficiency of the equipment is improved by 8%-12%; the reliability is enhanced: the non-contact measurement reduces mechanical loss, the average mean time between failures (MTBF) of the equipment is more than 1000 hours, and the average mean time between failures (MTBF) of the equipment is improved by 3-5 times compared with the contact sensor; and the applicability is expanded: the device is suitable for 5400mm wide cloth and 1500mm large roll diameter cloth, is compatible with various industrial cloth, reduces the equipment replacement cost, and improves the production line flexibility. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0017] Figure 1 FIG. 1 is a schematic diagram of the installation structure of the cloth inspecting laser detection device of the present application. DETAILED DESCRIPTION

[0018] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] In addition, the description such as "first", "second" in the present application is only for the purpose of description, and is not intended to indicate the order or sequence, nor to limit the present application, but only to distinguish the components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features of various embodiments can be combined with each other, but it must be based on the realization of the person skilled in the art, and when the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0021] Embodiment: Reference Figure 1 As shown, a cloth inspection machine laser detection device, comprising a laser detection module, a linkage control module and an actuator, the laser detection module is signal connected with the linkage control module, the linkage control module is drivingly connected with the actuator; the laser detection module is used for non-contact real-time detection of the roll diameter data of the cloth roll, and the roll diameter data is transmitted to the linkage control module; the linkage control module is used for receiving the roll diameter data, adjusting the operating parameters of the actuator according to the roll diameter data, and triggering the alarm action when the roll diameter data reaches the preset threshold value; the actuator is used to realize the unwinding, winding and positioning adjustment of the cloth roll, and ensure the continuous and stable cloth inspection process; the cloth inspection machine system comprises an unwinding A-frame 1, a gate car 3, an air cylinder 4, a guide roller 5, an operation main control screen 10, an alarm flash lamp 11, a tension controller 13, a positioning rod 14 and a winding driving roller 15.

[0022] The laser detection module adopts a laser range finder, and the laser range finder constitutes a laser detection device 2. The wavelength of the laser range finder is 600-700 nm, the detection range is 50-1500 mm, and the detection accuracy is not less than ±0.5 mm. The laser detection device 2 is installed on the side of the unwinding A-frame 1 of the cloth inspection machine, and is level with the cloth roll axis, and the laser emission direction is perpendicular to the cloth roll axis.

[0023] The linkage control module comprises a tension linkage unit, a winding linkage unit and a deviation correction linkage unit; the tension linkage unit is signal connected with the tension controller 13 of the cloth inspection machine, and is used for adjusting the unwinding speed according to the roll diameter data, so that the unwinding tension fluctuation is ≤±2%; the winding linkage unit is signal connected with the driving system of the winding driving roller 15 of the cloth inspection machine, and is used for matching the winding speed; the deviation correction linkage unit is signal connected with the servo deviation correction adjusting mechanism of the cloth inspection machine, and is used for dynamically adjusting the positioning rod 14, so that the winding flatness deviation is ≤1 mm. The linkage control module further comprises an alarm unit, the alarm unit comprises the alarm flash lamp 11 and the operation main control screen 10, when the roll diameter data reaches the preset threshold value, the alarm flash lamp 11 is started, and the operation main control screen 10 displays the warning information.

[0024] The actuator includes a pay-off assembly and a winding assembly; the pay-off assembly is a pay-off A-frame 1, which adopts a center main unwinding mode, cooperates with a brake car 3 and a cylinder 4 to realize stable unwinding; the winding assembly is configured with a web type expander and a rubber bending roller, can automatically switch according to the type of fabric, and is driven and cooperated with a winding driving roller 15. The linkage control module integrates a microcomputer control system, the microcomputer control system is integrated in an operation main control screen 10, and supports fabric width parameter presetting, winding diameter threshold setting, data recording and fault diagnosis functions. The device is adapted to a fabric width range of 500-5400 mm, the maximum winding diameter is 1500 mm, the detection response time is less than or equal to 0.1 s, and the stable conveying of the fabric roll is realized through the auxiliary guide roller 5. The device is compatible with glass fiber fabric, chemical fiber fabric and sensitive industrial fabric, and the winding flatness error is less than or equal to 1 mm, and the dynamic adjustment of the positioning rod 14 ensures the winding flatness. The device supports instant unrolling operation, the tension remains stable during unrolling, and the unrolling action is realized through the cooperative control of the center main unwinding structure of the pay-off A-frame 1 and the tension controller 13.

[0025] As an implementable manner, for the fabric inspection scene of a chemical fiber industrial fabric with a width of 2400 mm, the adapted fabric inspection machine system includes a pay-off A-frame 1, a laser detection device 2, a brake car 3, a cylinder 4, a guide roller 5, a visual system 6, a code spraying head 7, a meter counter 8, a fabric inspection backboard light box 9, an operation main control screen 10, an alarm flash 11, a manual operation table 12, a tension controller 13, a positioning rod 14 and a winding driving roller 15, and each component is arranged in sequence along the fabric conveying direction to form a complete process of “pay-off-detection-inspection-winding”; the fabric inspection laser detection device of the present application is integrated at the key nodes from the pay-off end to the winding end of the system, and the core is realized through the cooperation of the laser detection device 2 and the linkage control module to realize the fabric roll diameter monitoring and the whole process parameter linkage.

[0026] The laser detection device 2 is fixed to the right side column of the pay-off A-frame 1 by a wall-mounted bracket, the bracket can be adjusted in height up and down along the column, and is locked after adjustment by a bolt; the laser emission end of the device faces the center direction of the fabric roll, and the axis of the fabric roll on the pay-off A-frame 1 is kept at the same height. In this embodiment, the initial axis height of the fabric roll is 1600 mm, the laser emission direction is strictly perpendicular to the axis of the fabric roll, and the measurement distance is the straight line distance in the radius direction of the fabric roll.

[0027] The signal output end of the laser detection device 2 is connected with the signal input end of the operation main control screen 10 through the RS485 communication line to realize the real-time transmission of the winding diameter data; the power supply end of the device is connected with the 24V DC power supply module of the fabric inspection machine system through a navigation plug, the power supply line is sleeved with a metal corrugated pipe to avoid the interference of cotton and dust in the fabric inspection vehicle on the line.

[0028] The laser range finder wavelength of the laser detection device 2 is set to 650 nm in the optional range of 600-700 nm, which is the most optimal adaptability to the reflectivity of chemical fiber cloth, the detection range is adjusted to 80-1500 mm to match the monitoring requirements of the initial diameter 1200 mm to the threshold diameter 100 mm of the cloth roll in the embodiment, the detection accuracy is calibrated to ±0.3 mm higher than the standard of "not less than ±0.5 mm" in the claims, and the data sampling frequency is set to 10 Hz to ensure that the detection response time is less than or equal to 0.1 s.

[0029] The unwinding A-frame 1 is a symmetrical double-column structure fixed to the leftmost ground of the cloth inspection machine system, the bottom of the column is connected to the ground concrete foundation through expansion bolts, the top of the column is provided with a cloth roll supporting shaft, the cloth roll is sleeved on the supporting shaft, one end of the supporting shaft is connected with a servo motor for driving the cloth roll to unwind; the brake car 3 is installed on the inner side of the left column of the unwinding A-frame 1 through a hinge, the brake pad of the brake car 3 faces the end surface of the cloth roll, and the distance from the brake pad to the end surface of the cloth roll can be adjusted through an adjusting screw, and the initial distance is set to 3 mm in the embodiment; the air cylinder 4 is horizontally installed on the outer side of the left column of the unwinding A-frame 1, the end of the piston rod of the air cylinder 4 is connected with the connecting rod of the brake car 3 through a fish eye joint, and the extension direction of the piston rod is consistent with the rotation direction of the brake car 3.

[0030] The gas path input end of the air cylinder 4 is connected with the pneumatic three-in-one filter, pressure reducing valve and oil atomizer of the cloth inspection machine system through PU air pipe, the control signal end of the pneumatic three-in-one is connected with the output end of the operation main control screen 10 through the electromagnetic valve, so as to realize the extension control of the air cylinder 4; the signal end of the pressure sensor of the brake car 3 is connected with the input end of the tension controller 13, so as to realize the real-time feedback of the contact pressure between the brake pad and the cloth roll, and avoid the damage of the edge of the cloth roll caused by excessive pressure.

[0031] The winding driving roller 15 is a double-roller structure, which is installed in parallel at the rightmost end of the cloth inspection machine system, the distance between the two roller shafts is 300 mm, the roller surface is sleeved with a rubber layer with a hardness of 60 Shore A, the two ends of the roller are fixed on the winding rack through the bearing seat, and the bottom of the winding rack is provided with a guide rail which can move along the cloth width direction; the web-type expander roller is installed in front of the cloth inlet end of the winding driving roller 15 and is aligned with the output end of the guide roller 5, the width of the web-type expander roller is adapted to the cloth width of 2400 mm, and the web-type expander roller can be driven to expand or contract along the axial direction; the rubber bending roller is installed between the spoke-type expander roller and the winding driving roller 15, the roller surface is arc-shaped, the arc top faces the cloth conveying direction, and is used to press the fabric to the surface of the winding driving roller 15; the positioning rod 14 is two cylindrical light shafts, which are respectively installed vertically on both sides of the cloth inlet end of the winding driving roller 15, and the distance from the rod to the edge of the cloth width is 50 mm, and the bottom of the rod is connected with the sliding block of the servo deviation rectifying mechanism.

[0032] Two ends of the winding driving roller 15 are connected with independent variable frequency motors respectively, control signal ends of the motors are connected with output ends of the operation master control panel 10 through frequency converters, differential speed adjustment of the two rollers is realized, and the differential speed ratio is set to 1:1.05 in the embodiment; the servo deviation rectifying mechanism at the bottom of the positioning rod 14 is connected with the deviation rectifying linkage unit of the linkage control module through a servo driver, receives the roll diameter data and the cloth width deviation signal; the driving motors of the width strip type expanding roller and the rubber bending roller are connected with the operation master control panel 10 through relays, and the working mode can be automatically switched according to the fabric thickness, and the thickness of the chemical fiber cloth is 0.3mm in the embodiment.

[0033] The operation master control panel 10 is embedded and installed on the table surface of the manual operation table 12, the table surface is located at the right side of the cloth inspection machine system, the display surface of the operation master control panel 10 is kept at an inclination angle of 15° with the table surface, and the operator can observe conveniently in a sitting position; the alarm flash lamp 11 is installed at the upper right corner of the manual operation table 12 through a stand, the height is higher than the top of the cloth inspection workshop equipment, and the height is 2200mm in the embodiment, and the alarm flash lamp 11 can be seen in a 360° range in the workshop; the tension controller 13 is an independent module, is fixed in the electrical cabinet below the manual operation table 12, the electrical cabinet is located directly below the operation master control panel 10, and a cooling fan is arranged in the cabinet; the cloth inspection backboard lamp box 9 is installed above the guide roller 5, is kept parallel to the conveying surface of the guide roller 5, the light emitting surface of the lamp box faces downward, and is used for providing a uniform light source for the visual system 6; the visual system 6 is arranged above the guide roller 5 through a gantry, and the lens faces the cloth surface between the lamp box 9 and the guide roller 5; the code spraying head 7 is installed at the right side of the visual system 6, the outlet of the head faces the cloth surface, and the distance between the outlet and the cloth surface is kept to be 15mm; the meter counter 8 is sleeved on one end of the guide roller 5, is engaged with the rotating shaft of the guide roller 5 through a gear, and rotates synchronously with the guide roller 5.

[0034] The core control unit microcomputer control system of the operation master control panel 10 realizes bidirectional communication with the tension controller 13, the frequency converter of the winding driving roller 15 and the driver of the servo deviation rectifying mechanism through an Ethernet, can receive tension data and roller speed data simultaneously, and sends adjustment instructions; the power supply end of the alarm flash lamp 11 is connected with the alarm output end of the operation master control panel 10 through a relay, when the roll diameter reaches a threshold value, the relay is attracted, and the alarm flash lamp 11 flashes at a frequency of 1Hz; the image signal output end of the visual system 6 is connected with the image acquisition end of the operation master control panel 10, the control end of the code spraying head 7 is connected with the code spraying instruction output end of the operation master control panel 10, when the visual system 6 detects a flaw on the cloth surface, the operation master control panel 10 triggers the code spraying head 7 to spray a mark at the flaw position; the pulse output end of the meter counter 8 is connected with the counting input end of the operation master control panel 10, the real-time statistics of the cloth length data are realized, the statistical data are stored in association with the roll diameter data, and the detection record of each roll of cloth can be traced conveniently.

[0035] The operator presets parameters on the manual console 12 by operating the master control panel 10: fabric width 2400 mm, roll diameter pre-warning threshold 100 mm, unwinding tension 50 N, initial rotating speed of the winding driving roller 15 8 m / min, alignment deviation allowance of the servo deviation correction mechanism ≤1 mm; after setting the parameters, the master control panel 10 sends a calibration instruction to the laser detection device 2, the laser detection device 2 emits laser to the empty support shaft on the unwinding A-frame 1 without fabric roll, and the reference distance of the support shaft is recorded, which is 280 mm in this embodiment, and zero-point calibration is completed; then a chemical fiber fabric roll with a diameter of 1200 mm is hoisted to the support shaft of the unwinding A-frame 1, the piston rod of the air cylinder 4 is extended under the control of the master control panel 10, the brake pad of the brake car 3 is lightly attached to the end surface of the fabric roll, and the pressure sensor feeds back the pressure value to the tension controller 13, and the pre-pressing value is adjusted to 15 N.

[0036] After starting the fabric inspection machine system, the servo motor of the unwinding A-frame 1 drives the fabric roll to unwind clockwise, the fabric roll sequentially passes through the end surface limiting of the brake car 3, the guiding and conveying of the guide roller 5, and enters the fabric inspection area between the fabric inspection backboard light box 9 and the vision system 6; at the same time, the laser detection device 2 emits laser at a frequency of 10 Hz, measures the real-time distance between the measuring device and the surface of the fabric roll, the initial distance is 600 mm, corresponding to the initial radius of the fabric roll 600 mm, and transmits the distance data to the master control panel 10, and the master control panel 10 converts the current roll diameter according to the formula “roll diameter = 2 x measured distance - reference distance” to obtain the initial roll diameter = 2 x 600 - 280 = 640 mm; the correction process is: the initial fabric roll diameter is 1200 mm, the radius is 600 mm, the measured distance = the reference distance of the support shaft radius + the support distance + the radius of the fabric roll, assuming that the support shaft radius is 50 mm, the support distance is 230 mm, the reference distance = 230 + 50 = 280 mm, the initial measured distance = 280 + 600 = 880 mm, the roll diameter = 2 x 880 - 280 = 1200 mm, which meets the initial setting.

[0037] As the fabric roll unwinds, the roll diameter gradually decreases from 1200 mm to 800 mm, the measured distance of the laser detection device 2 decreases from 880 mm to 680 mm, and the master control panel 10 transmits the roll diameter change data to the tension controller 13, and the tension controller 13 automatically adjusts the torque of the unwinding servo motor from the initial 12.5 N·m to 9.375 N·m according to the relationship “unwinding tension = motor torque x 2 / roll diameter”, so as to ensure that the unwinding tension is stably maintained at 50 N, and the fluctuation amount is ≤±2%, and the actual monitoring fluctuation range is 49.2-50.8 N.

[0038] The operation master screen 10 feeds back the real-time roll diameter data such as 800 mm to the frequency converter of the winding driving roller 15. The frequency converter adjusts the rotating speed of the winding driving roller 15 from the initial 8 m / min to 6.37 m / min according to the formula of "winding linear speed = π x roll diameter x rotating speed", ensures the consistency of the winding linear speed and the unwinding linear speed, avoids the stretching or accumulation of the cloth surface, and adjusts the differential ratio of the two winding driving rollers 15 to keep 1:1.05 to realize the tight winding of the cloth roll.

[0039] The cloth surface on the guide roller 5 may be misaligned in the edge during the conveying process due to the unwinding deviation. The infrared sensor on the positioning rod 14 detects the distance between the edge of the cloth surface and the positioning rod 14, which is preset to be 50 mm. When the detected distance becomes 51.2 mm with a deviation of 1.2 mm, the servo correction mechanism receives the instruction of the operation master screen 10, drives the positioning rod 14 to move 1.2 mm towards the cloth surface, adjusts the position of the winding rack along the guide rail at the same time, and makes the distance between the edge of the cloth surface and the positioning rod 14 return to 50 mm, so as to ensure that the error of the winding flatness is less than or equal to 1 mm.

[0040] The vision system 6 collects the cloth surface image in real time. When a hole with a diameter of 0.5 mm is detected, the defect position data is transmitted to the operation master screen 10. The operation master screen 10 controls the ink-jet head 7 to spray a black dot mark 100 mm to the right of the hole. The meter counter 8 rotates with the guide roller 5. Every time it rotates one circle, it sends 100 pulse signals to the operation master screen 10. The operation master screen 10 calculates the real-time cloth length pulse number x 300 mm / 100 = 3 x pulse number mm according to the circumference of the guide roller 5 which is 300 mm in this embodiment, and stores it in association with the roll diameter data.

[0041] When the cloth roll continues to unroll to the roll diameter close to 100 mm, the measurement distance of the laser detection device 2 is reduced to 280+50=330 mm corresponding to the roll diameter 100 mm, the operation master control screen 10 determines that the early warning threshold is reached, and immediately performs two actions: one is to control the alarm flash lamp 11 to flash at a frequency of 1 Hz, and at the same time a red early warning window is popped up on the interface of the operation master control screen 10, displaying "the cloth roll is insufficient, the remaining roll diameter is 100 mm, please prepare to add the lead cloth"; the second is to send a speed reduction instruction to the tension controller 13, reducing the unwinding speed from 8 m / min to 4 m / min, reserving the roll changing time for the operator; After the operator sees the early warning, the lead cloth is pasted to the end of the current cloth roll with the same width of polyester lead cloth on one end of the chemical fiber cloth, and the other end of the lead cloth passes through the guide roller 5, the cloth inspection area, and is connected with the cloth roll on the winding driving roller 15; After the connection is completed, the operator clicks the "confirm roll changing" button on the operation master control screen 10, the alarm flash lamp 11 stops flashing, and the operation master control screen 10 sends a stop instruction to the unwinding A-frame 1, the servo motor stops, the pneumatic cylinder 4 retracts the piston rod, and the brake pad of the brake car 3 is separated from the end face of the cloth roll, completing the disassembly of the old roll; Then hoist a new 1200 mm diameter cloth roll to the unwinding A-frame 1, repeat the pre-pressing adjustment in the initialization stage, and enter the next round of cloth inspection process.

[0042] As an implementable way, "displacement sensors" (coaxial with the support shaft, model: LVDT linear displacement sensor) are installed at both ends of the cloth roll support shaft of the unwinding A-frame 1 to detect the axial offset of the cloth roll in real time; When the displacement sensor detects that the offset is >2 mm (the conventional allowable value is 1 mm), the system triggers self-repair: the operation master control screen 10 sends a "one-sided fine-tuning instruction" to the pneumatic cylinder 4, the left side of the pneumatic cylinder piston rod extends 0.5 mm, and the right side of the pneumatic cylinder piston rod retracts 0.5 mm, which pushes the cloth roll to offset to the center through the one-sided pressure difference of the brake car 3; At the same time, the speed difference of the unwinding servo motor is adjusted (the left motor speed is reduced by 0.2 m / min, and the right motor remains unchanged), which assists the cloth roll to return to normal; After the repair is completed, the displacement sensor feedbacks that the offset is ≤0.8 mm, and there is no need to stop, and the repair time is <10 s (the conventional manual repair needs 5-10 min).

[0043] For 5400mm super wide cloth roll, a "scalable extension section" (extension section length 0-300mm, material consistent with the main roller, connected with the main roller through keyway, can be manually adjusted and locked) is added at both ends of the winding main roller 15; a "middle support roller" (installed below the expansion roller, parallel to the expansion roller, diameter 50mm, height adjusted by lifting cylinder) is added in the middle of the width strip type expansion roller, when the cloth width is >4000mm, the middle support roller rises to the same level as the surface of the expansion roller, avoiding the winding wrinkles caused by the sagging of the middle part of the super wide cloth; the positioning rod 14 adopts a "segmented structure" (each segment is 1200mm long, a total of 5 segments, connected by flanges), which can be spliced or disassembled according to the cloth width, suitable for cloth width of 500-5400mm, solving the problem of "fixed length cannot adapt to super wide width" of the conventional positioning rod.

[0044] The signal output end of the displacement sensor is connected with the operation main control screen 10 through an analog signal line; the locking mechanism of the winding main roller 15 extension section is fixed by hand screw; the lifting cylinder control end of the middle support roller is connected with the output end of the operation main control screen 10, which can automatically control the lifting according to the preset cloth width.

[0045] As an implementable way, during the winding process, the pre-adjustment is realized by setting the winding diameter change rate and material adaptation model, realizing the cooperative pre-judgment scheme of the cloth inspection machine "multi-material, multi-condition", solving the pain point of "different material cloth roll needs manual repeated parameter adjustment" in the industry; the winding diameter change rate satisfies: ΔD / Δt; ΔD is the difference value of adjacent 10 times sampling winding diameter, Δt is the sampling interval 0.1s; the microcomputer control system of the operation main control screen 10 calculates the "winding diameter change rate" in real time; when the winding diameter change rate increases from 0.5mm / s (normal unwinding) to 1.2mm / s (before the cloth roll is about to run out, the unwinding speed increases), the system sends a "pre-adjustment instruction" to the tension controller 13 0.5s in advance, reduces the unwinding tension from 50N to 48N (for chemical fiber cloth), avoids the sudden increase of tension caused by the sudden decrease of winding diameter; at the same time, a "pre-speed reduction instruction" is sent to the frequency converter of the winding main roller 15, the rotating speed is reduced from 8m / min to 7.2m / min, realizing "pre-judgment adjustment" instead of "lag response".

[0046] The operator presets the material of the roll (such as "glass fiber cloth", "chemical fiber cloth", "sensitive industrial cloth") on the operation master screen 10, and the system automatically calls the built-in adaptive parameter library: glass fiber cloth: the allowable value of unwinding tension fluctuation is ≤±1.5% (more stringent than the conventional ±2%), and the differential ratio of the winding driven roller 15 is 1:1.02 (to avoid rigid cloth stretching); sensitive industrial cloth: the pre-press value of the brake 3 is ≤10N (the conventional is 15N), and the expansion speed of the width strip type expansion roller is reduced by 50% (to avoid cloth surface scratch); 2. Taking the glass fiber cloth as an example: when the roll diameter decreases from 1200mm to 800mm, the tension controller 13 adjusts the motor torque according to the adaptive model, and the adjustment precision is increased from ±0.5N・m to ±0.3N・m, so as to ensure that the tension is stable at 60N (the adaptive tension of the glass fiber cloth), and the fluctuation amount is only ±1.2%. The microcomputer control system of the operation master screen 10 realizes "two-way data interaction" with the tension controller 13, the frequency converter of the winding driven roller 15 and the pressure sensor of the brake 3 through Ethernet, so as to ensure that the prediction instruction is executed in priority to the conventional adjustment instruction.

[0047] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Those skilled in the art can make various changes and modifications to the present application; any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A laser detection device for a fabric inspection machine, characterized in that, It includes a laser detection module, a linkage control module, and an actuator. The laser detection module is signal-connected to the linkage control module, and the linkage control module is drive-connected to the actuator. The laser detection module is used for non-contact real-time detection of the roll diameter data of the fabric roll and transmits the roll diameter data to the linkage control module. The linkage control module is used to receive roll diameter data, adjust the operating parameters of the actuator according to the roll diameter data, and trigger an alarm action when the roll diameter data reaches a preset threshold. The actuator is used to realize the unwinding, winding and positioning adjustment of the fabric roll to ensure the continuous and stable fabric inspection process; the fabric inspection machine system includes an unwinding A-frame (1), a brake (3), a cylinder (4), a guide roller (5), an operation main control screen (10), an alarm flashing light (11), a tension controller (13), a positioning rod (14) and a winding active roller (15).

2. The laser detection device for a fabric inspection machine according to claim 1, characterized in that, The laser detection module uses a laser rangefinder, which constitutes a laser detection device (2). The wavelength of the laser rangefinder is 600-700nm, the detection range is 50-1500mm, and the detection accuracy is not less than ±0.5mm.

3. The laser detection device for a fabric inspection machine according to claim 2, characterized in that, The laser detection device (2) is installed on the side of the unwinding A-frame (1) of the fabric inspection machine and is at the same height as the fabric roll axis, with the laser emission direction perpendicular to the fabric roll axis.

4. The laser detection device for a fabric inspection machine according to claim 1, characterized in that, The linkage control module includes a tension linkage unit, a winding linkage unit, and a correction linkage unit; The tension linkage unit is connected to the tension controller (13) of the fabric inspection machine and is used to adjust the unwinding speed according to the roll diameter data so that the unwinding tension fluctuation is ≤±2%; The winding linkage unit is connected to the winding active roller (15) drive system of the fabric inspection machine by signal connection, and is used to match the winding speed; The correction linkage unit is connected to the servo correction adjustment mechanism of the fabric inspection machine to dynamically adjust the positioning rod (14) so ​​that the winding alignment deviation is ≤1mm.

5. The laser detection device for a fabric inspection machine according to claim 1, characterized in that, The linkage control module also includes an alarm unit, which includes an alarm flashlight (11) and an operation main control screen (10). When the roll diameter data reaches a preset threshold, the alarm flashlight (11) is activated and the operation main control screen (10) displays a warning message.

6. The laser detection device for a fabric inspection machine according to claim 1, characterized in that, The actuator includes an unwinding assembly and a winding assembly; The unwinding assembly is an unwinding A-frame (1), which adopts a central main unwinding method and works with a brake (3) and a cylinder (4) to achieve smooth unwinding; the winding assembly is equipped with a web-type expansion roller and a rubber bending roller, which can be automatically switched according to the fabric type, and the winding assembly is driven by the winding active roller (15).

7. The laser detection device for a fabric inspection machine according to claim 1, characterized in that, The linkage control module integrates a microcomputer control system, which is integrated into the main control screen (10) and supports functions such as fabric width parameter preset, roll diameter threshold setting, data recording and fault diagnosis.

8. The laser detection device for a fabric inspection machine according to claim 1, characterized in that, The device is suitable for fabric widths of 500 to 5400 mm, has a maximum winding diameter of 1500 mm, a detection response time of ≤0.1 s, and achieves stable conveying of the fabric roll with the assistance of guide rollers (5).

9. The laser detection device for a fabric inspection machine according to claim 1, characterized in that, The device is compatible with fiberglass cloth, chemical fiber cloth and sensitive industrial cloth, with a winding flatness error of ≤1mm, and the winding flatness is ensured by the dynamic adjustment of the positioning rod (14).

10. The laser detection device for a fabric inspection machine according to claim 1, characterized in that, The device supports rewinding at any time, the tension remains stable during the rewinding process, and the rewinding action is achieved through the coordinated control of the central main unwinding structure of the unwinding A-frame (1) and the tension controller (13).

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