Intelligent detection device for quality of dyed yarn and detection method thereof

Abstract

The invention relates to the technical field of dyed yarn quality detection, and discloses a dyed yarn quality intelligent detection device and a detection method thereof.The dyed yarn quality intelligent detection device comprises two sets of first guide wheels and second guide wheels which are arranged at the upper end of a detection table, two sets of detection devices are arranged between the two sets of second guide wheels, and a cleaning device is installed between the two sets of detection devices; one end of the base is provided with an unwinding assembly, the other end of the base is provided with an unwinding assembly, a detection disc is installed on the base, a slidable detection head is installed in the detection disc, detection magnetic blocks are in electromagnetic connection in the detection head, and a sensing element is installed between the detection magnetic blocks; during detection, the dyed yarn is sequentially threaded, the winding assembly is started for sampling, the first detection device is used for detecting impurities, then the cleaning device is used for cleaning, and finally the second detection device is used for detecting cracks, so that the quality detection of the dyed yarn is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of colored yarn quality detection, in particular to an intelligent colored yarn quality detection device and a detection method thereof. Background Art

[0002] As a unique type of yarn in the textile field, the manufacturing process of colored spun yarn is different from traditional spinning. It first dyes the fiber into colored fiber, and then fully mixes two or more fibers of different colors, and then spins them into yarn with a unique mixed color effect.

[0003] The existing Chinese patent with announcement number CN108918260A discloses a colored yarn strength detection device, which drives the blade to descend by a lifting motor, clamps the two ends of the yarn to be tested by a wire clamp and a movable clamp, and drives the movable clamp to move by a mobile stepping motor to generate tension on the yarn. The tension on the yarn is detected by a force sensor, and the detection work is automatically completed with improved accuracy. The entire process of the yarn being subjected to force is filmed by a camera, which is convenient for subsequent review by the detection personnel, and the unqualified yarn is cut by the blade to distinguish the defective yarn.

[0004] In the existing technology, the uneven distribution of fibers inside the colored yarn and the presence of weak points are not easy to detect. By moving the moving clamp to move the stepper motor, tension is generated on the yarn, and the tension on the yarn is detected by the force sensor, which may cause more obvious deformation or damage to these weak parts, but the yarn does not break, resulting in a decrease in the detection effect of the colored yarn, which in turn affects the tension.

[0005] Therefore, a kind of intelligent detection device and detection method of colored yarn quality are needed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defects of the existing technology. The present invention proposes an intelligent detection device for colored yarn quality and a detection method thereof to solve the problem that the existing technology detects the tension exerted on the yarn, which may cause more obvious deformation or damage to these weak parts, but the yarn does not break, resulting in a decrease in the detection effect of the colored yarn.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: an intelligent detection device for colored yarn quality and a detection method thereof, comprising a detection platform, two sets of guide wheels 1 are fixedly installed on the upper end of the detection platform, guide wheels 2 are provided on the side close to each other of the two sets of guide wheels 1, two sets of detection devices are provided between the two sets of guide wheels 2, a cleaning device is fixedly installed between the two sets of detection devices, the detection platform comprises a fixed base, a winding assembly is fixedly installed on one end of the fixed base, and an unwinding assembly is fixedly installed on the other end of the fixed base, the detection device comprises a base, the base is slidably connected to the fixed base, a detection disk is fixedly installed on the upper end of the base, a detection head is slidably provided inside the detection disk, the detection head is electromagnetically connected to a detection magnetic block, and a sensor element is provided between the detection magnetic block and the detection head. The cleaning device comprises two sets of connecting tubes 1, both sets of connecting tubes 1 are connected with the unwinding assembly, arc tubes are fixedly installed on the upper ends of the two sets of connecting tubes 1, two sets of air holes are opened on the inner side of the arc tubes, the two sets of air holes are connected with the connecting tube 1, cleaning assemblies are fixedly installed inside the two sets of air holes, two sets of protective shells are hinged on the upper ends of the arc tubes, when it is necessary to detect the weak points on the outer surface of the colored yarn, the colored yarn disc is fixed on the unwinding assembly, and another new colored yarn disc is fixed on the winding assembly, the colored yarn is passed through the guide wheel 1 and the guide wheel 2 in sequence, and then through the detection device and the cleaning device, and then through the second set of detection devices, guide wheel 2 and guide wheel 1, and fixed on the colored yarn disc fixed on the winding assembly, and the winding assembly is started The colored yarn rope is wound up, sampled and tested on the colored yarn rope, a section of colored yarn rope in the colored yarn disk is selected, and the colored yarn rope of the guide wheel 2 and the cleaning device is tested by starting the first group of detection devices. After the detection device is started, the four groups of detection heads in the detection device approach the colored yarn rope at the same time, and the detection magnetic block pops out from the detection head under the action of magnetism and contacts the colored yarn rope. If there are foreign objects attached to the surface of the colored yarn rope, when the detection magnetic block rubs the colored yarn rope, the charge will move away from the surface of the colored yarn rope with impurities, and the magnetic field change on the surface of the colored yarn rope is detected by the sensor element, and then the quality of the colored yarn rope surface is observed to be qualified. At the same time, the impurities on the surface of the colored yarn rope may affect the detection of deformed or damaged parts of the colored yarn rope. After the colored yarn rope is tested for impurities, The winding component is started a second time to clean the colored yarn rope in the detection section through the arc tube. The cleaning component is driven by the winding component to clean and remove impurities on the surface of the colored yarn. At the same time, the colored yarn in the arc tube is blown clean by the winding component. The colored yarn rope passing through the arc tube is then passed through the second set of detection devices to detect whether there are cracks on the surface. Since slight damage to the colored yarn rope will make the fiber structure on the surface uneven, the originally uniform charge distribution will be broken. During the friction process, the charge is more likely to accumulate at and near the damaged part, resulting in an increase in local charge density and an increase in electrostatic field strength. When small damage or fiber breakage occurs on the colored yarn surface, these positions will become charge concentration points. At this time, the detection magnetic block can be ejected from the detection head under the action of magnetism to contact the colored yarn rope.The sensor element detects the change of magnetic field on the surface of the colored yarn rope, and then observes whether the surface of the colored yarn rope is damaged. By sampling and testing the colored yarn rope, the quality of the colored yarn ropes on this group of colored yarn discs is tested.

[0008] Furthermore, through hole one and through hole two are provided on the fixed base, through hole one is connected with the winding assembly, a filter is fixedly installed inside through hole one, through hole one and through hole two are both connected with two sets of connecting tubes one, when the colored yarn in the arc tube is blown clean by the winding assembly, the wind generated by the winding assembly is filtered through the filter, and then flows in through through hole two, blowing and cleaning the colored yarn rope in the arc tube, and blowing and cleaning the dust and impurities on the colored yarn rope.

[0009] Furthermore, the unwinding assembly includes a telescopic rod, the outer side of the telescopic rod is fixedly connected to the fixed base, the driving end of the telescopic rod is fixedly installed with a connecting block 1, the connecting block 1 is slidingly connected to the fixed base, and the end of the connecting block 1 away from the telescopic rod is fixedly installed with a winding disk. By placing the colored yarn disk on the unwinding assembly and fixing it by the winding disk, the elongation of the colored yarn rope is adjusted by the telescopic rod, and the quality detection effect of the colored yarn rope is improved by adjusting the elongation of the colored yarn rope.

[0010] Furthermore, the winding assembly includes a dual-axis motor, one of the driving ends of the dual-axis motor is fixedly installed with a winding disk, the other driving end of the dual-axis motor is fixedly installed with a connecting column, the end of the connecting column away from the dual-axis motor is fixedly installed with a bevel gear 1, the outer side of the bevel gear 1 is meshed with a bevel gear 2, the lower end of the bevel gear 2 is rotatably installed with a connecting rod 1, one end of the connecting rod 1 is fixedly connected to the connecting column, the upper end of the bevel gear 2 is fixedly rotatably installed with a connecting block 2, the connecting block 2 is away from the center of the bevel gear 2, the upper end of the connecting block 2 is rotatably installed with a connecting rod 2, the end of the connecting rod 2 away from the connecting block 2 is rotatably installed with a piston, the outer side of the piston is provided with a connecting pipe 2, and the piston is slidingly connected to the connecting pipe 2.

[0011] Furthermore, one end of the connecting tube is fixedly connected to the fixed base, one end of the connecting tube is connected to the through hole, and the other end of the connecting tube is rotatably connected to the connecting column. By placing the colored yarn disc on the unwinding assembly for fixing, another new colored yarn disc is placed on the winding assembly for fixing, and the dual-axis motor is started to drive the winding disc at the driving end of the dual-axis motor to wind. At the same time, the bevel gear one is driven to rotate by the other driving end of the dual-axis motor, and the bevel gear two is driven to rotate by the rotation of the bevel gear one. The rotation of the bevel gear two drives the connecting rod two to rotate with the axis of the bevel gear two as the center of the circle, thereby pulling the piston to perform reciprocating motion inside the connecting tube two, and the airflow generated by the piston flows into the through hole one from the connecting tube two, cleaning the colored yarn in the arc tube, thereby realizing the detection of whether the colored yarn rope in the arc tube is cracked when it passes through the second set of detection devices.

[0012] Furthermore, adjustment blocks are installed at both ends of the arc tube, and a micrometer is fixedly installed at the lower end of the adjustment block. The micrometer is located inside the arc tube. By adjusting the micrometer, the position of the colored yarn rope and the cleaning component is adjusted to prevent the cleaning component from damaging the colored yarn rope.

[0013] Furthermore, U-shaped magnets are fixedly installed on the inner side of the protective shell. By opening the two sets of protective shells, the colored yarn rope is passed through the inside of the arc tube, and then the protective shell is closed by the U-shaped magnet inside the protective shell, thereby protecting the colored yarn rope from dust and improving the detection accuracy.

[0014] Furthermore, the cleaning component includes a connecting block three, the interior of the connecting block three is provided with a T-shaped slide groove, and two groups of T-shaped sliders are slidably installed inside the T-shaped slide groove, and the ends of the two groups of T-shaped sliders away from each other are fixedly installed with elastic members, and one end of the elastic member is fixedly connected to the connecting block three, and a cam is rotatably installed inside the connecting block three, and the cam is fitted with one group of T-shaped sliders. An impeller is fixedly installed on the lower end of the cam, and the upper end of the impeller passes through the connecting block three, and the impeller is located inside the connecting pipe one. Connecting rod three is fixedly installed on the upper ends of the two groups of T-shaped sliders, and a circular hole is provided on the upper end of the connecting rod three. A fan blade ring is rotatably installed between the two groups of connecting rods three, and a cross ring is fixedly installed inside the fan blade ring. The fan blade ring is provided with multiple groups of square grooves, and the cross ring is fixedly installed inside The cutter passes the colored yarn rope through the circular hole through the two groups of cross rings. The airflow generated by the piston flows into the through-hole one from the connecting pipe two, blowing the connecting pipe one. The wind force blows the impeller to rotate, thereby driving the cam to rotate. The rotation of the cam squeezes a group of T-shaped sliders to move back and forth in the T-shaped slide groove, and the T-shaped sliders drive the two groups of connecting rods three and the cross rings between the two groups of connecting rods three to swing left and right. At the same time, under the wind force of the through-hole one, the fan blade ring is blown, driving the fan blade ring to rotate. Since a distance of mm is reserved between the cutter inside the cross ring and the colored yarn rope, the impurities on the surface of the colored yarn rope are slightly cut off by the cutter inside the cross ring, thereby reducing the interference of impurities on the colored yarn rope when it passes through the second group of detection devices.

[0015] Further, the following steps are included: S1: By operating the telescopic rod, adjust the extension of the colored yarn rope to the appropriate range according to the thickness and material characteristics of the colored yarn. The general extension adjustment range is 0.5m-2m. For finer silk colored yarn, the extension can be adjusted to 0.5m-1m; for thicker cotton colored yarn, the extension can be adjusted to 1m-2m. After the adjustment is completed, place the colored yarn disc firmly on the reel of the unwinding component to ensure that the colored yarn disc is firmly installed to prevent shaking or deviation during the inspection process. Slide the base of the detection device on the fixed base to a suitable position to ensure that the detection head can accurately cover the area of ​​the colored yarn rope to be detected. The sliding distance can be adjusted within the range of 5-20cm according to the size of the colored yarn disc and the detection requirements. By adjusting the drive device in the detection disc, the detection head can be smoothly moved towards and away from the colored yarn rope. The movement speed of the detection head can be set to 0.1cm / s-0.5cm / s; Use the adjustment blocks at both ends of the two sets of arc tubes to accurately adjust the distance between the colored yarn rope and the cleaning component with a micrometer. The general adjustment range is 3mm-8mm. For ordinary colored yarn, the distance can be set to 5mm; for more fragile colored yarn, the distance can be appropriately increased to 7mm-8mm to prevent the cleaning component from damaging the colored yarn rope; S2: Pass the colored yarn through the two sets of guide wheels one in sequence, ensuring that the colored yarn remains centered in the guide wheel groove without any jamming. The spacing of the guide wheels one can be adjusted within the range of 5mm-15mm according to the width of the colored yarn. Then pass it through the guide wheel two. The spacing of the guide wheels two can also be adjusted within the range of 3mm-10mm according to the width of the colored yarn, so that the guide wheels two can fit closely to the colored yarn rope without excessive squeezing. Then pass it through the first set of detection devices, the arc tube of the cleaning device, the second set of detection devices, the guide wheels two and the guide wheels one in sequence; Securely fix the two ends of the colored yarn to the starting end of the unwinding assembly and the reel of the rewinding assembly respectively to ensure that the colored yarn maintains a stable tension during the entire testing process. The tension range can be adjusted between 0.5N-2N according to the material and specifications of the colored yarn. For fine chemical fiber colored yarn, the tension can be controlled between 0.5N-1N; for coarse linen colored yarn, the tension can be adjusted to 1N-2N; S3: Start the winding assembly, the dual-axis motor runs, driving the winding disc to wind up the colored yarn rope at the set speed. The winding speed is generally set to (0.2-1) m / min. At the same time, start the first set of detection devices. Driven by the motor, the four sets of detection heads in the detection disc approach the colored yarn rope at the same time at a speed of (0.1-0.3) cm / s until the detection magnet pops out from the detection head under the magnetic effect and contacts the colored yarn rope. When the detection magnetic block rubs against the surface of the colored yarn rope, if there is debris attached to the surface of the colored yarn rope, the charge will be moved away from the part with impurities due to electrostatic induction. The sensor element in the detection head captures the magnetic field change signal on the surface of the colored yarn rope in real time. The sensor element converts the magnetic field change signal into an electrical signal and transmits it to the data processing unit. The data processing unit determines whether the surface quality of the colored yarn rope is qualified based on the preset magnetic field change threshold. The magnetic field change threshold can be set within the range of ± (0.05-0.2) mT according to the material of different colored yarns and the normal surface condition. For cotton colored yarn, the threshold can be set to ± 0.1 mT; for synthetic fiber colored yarn, the threshold can be set to ± 0.15 mT. S4: After the impurity detection is completed, the rewinding assembly is started for the second time. The other driving end of the dual-axis motor drives the bevel gear 1 to rotate. The bevel gear 1 and the bevel gear 2 are meshed with each other, so that the bevel gear 2 rotates at a speed of (5-15) r / min. The rotation of the bevel gear 2 drives the connecting rod 2 to make a circular motion with its axis as the center of the circle. The piston is pulled by the connecting rod mechanism to make a reciprocating motion in the connecting pipe 2. The airflow generated by the piston flows into the through hole one through the connecting pipe two, and then enters the arc tube through the connecting pipe one to blow the colored yarn rope in the arc tube. The airflow speed can reach (5-15) m / s, and the dust and impurities on the surface of the colored yarn rope are initially blown and cleaned. The airflow blows the impeller in the connecting pipe one to rotate, and the impeller drives the cam to rotate synchronously. The cam squeezes a group of T-shaped sliders according to a specific contour curve and moves back and forth in the T-shaped slide groove at a frequency of (1-3) times / s. The T-shaped sliders drive the two groups of connecting rods three and the cross ring to shake left and right. At the same time, the airflow blows the fan blade ring to rotate at a speed of (10-30) r / min. Since the cutter inside the cross ring is 5mm away from the colored yarn rope, under the synergistic effect of the high-frequency shaking of the cross ring and the high-speed rotation of the fan blade ring, the cutter slightly cuts off the impurities on the surface of the colored yarn rope. S5: After cleaning, the colored yarn rope passes through the second set of detection devices. The detection magnetic block in the detection head is ejected at a speed of (0.1-0.3) cm / s under the control of the motor to contact the colored yarn rope. Slight damage to the colored yarn rope will cause the surface fiber structure to be uneven, the charge distribution to change, the local charge density to increase, and the electrostatic field strength to increase. These changes will cause complex changes in the magnetic field on the surface of the colored yarn rope. The sensor element in the detection head not only detects the change in magnetic field intensity, but also detects the change in magnetic field direction through a multi-axis magnetic field sensor. The sensor element transmits the collected magnetic field intensity and direction change data to the data processing unit. The data processing unit uses the pre-established colored yarn crack magnetic field feature database to compare and analyze the collected data. When it is detected that the magnetic field intensity changes sharply within a short distance and the magnetic field direction is abnormally twisted, and the matching degree with the known crack magnetic field features in the database exceeds 80%, it is determined that there is a crack on the surface of the colored yarn rope.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes an intelligent detection device and detection method for colored yarn quality. When it is necessary to detect the weak points on the outer surface of the colored yarn, the colored yarn disc is placed on the unwinding assembly and fixed, and another new colored yarn disc is placed on the winding assembly and fixed. The colored yarn is passed through the guide wheel 1 and the guide wheel 2 in sequence, and then through the detection device and the cleaning device, and then through the second group of detection devices, the guide wheel 2 and the guide wheel 1, and is fixed on the colored yarn disc fixed on the winding assembly. The winding assembly is started to reel in the colored yarn rope, and the colored yarn rope is sampled and tested. Select a section of colored yarn rope from the colored yarn disk, and start the first set of detection devices to detect the colored yarn rope between the guide wheel 2 and the cleaning device. After starting the detection device, the four sets of detection heads in the detection device approach the colored yarn rope at the same time. Under the action of magnetism, the detection magnetic block pops out from the detection head and contacts the colored yarn rope. If there is debris attached to the surface of the colored yarn rope, when the detection magnetic block rubs the colored yarn rope, the charge will move away from the surface of the colored yarn rope with impurities. The magnetic field change on the surface of the colored yarn rope is detected by the sensor element, and then the quality of the colored yarn rope surface is observed to be qualified. At the same time, impurities on the surface of the colored yarn rope may affect the detection of deformation or damage to the colored yarn rope. After the colored yarn rope is detected for impurities, the reeling component is started a second time to clean the colored yarn rope in the detection section through the arc tube. The reeling component drives the cleaning component to clean and remove impurities on the surface of the colored yarn. At the same time, the colored yarn in the arc tube is blown clean by the reeling component. The colored yarn rope passing through the arc tube is then tested for cracks on the surface by the second set of detection devices. Slight damage to the colored yarn rope will make the surface fiber structure uneven, and the originally uniform electrical The charge distribution is broken. During the friction process, the charges are more likely to accumulate at and near the damaged parts, resulting in an increase in local charge density and an increase in the electrostatic field strength. When small damage or fiber breakage occurs on the surface of the colored yarn, these locations will become charge concentration points. At this time, the magnetic block can be detected to pop out from the detection head and contact the colored yarn rope under the action of magnetism. The magnetic field changes on the surface of the colored yarn rope are detected through the sensor element, and then the surface of the colored yarn rope is observed to see if there are any damages. The quality of the colored yarn ropes on this group of colored yarn discs can be inspected through sampling inspection of the colored yarn ropes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are for illustration purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Figure 1 Schematically shows an overall structural diagram proposed according to one embodiment of the present invention; Figure 2 Schematically shows a schematic diagram of the overall internal structure proposed according to one embodiment of the present invention; Figure 3Schematically shows a schematic structural diagram of a detection platform and an unwinding assembly proposed according to one embodiment of the present invention; Figure 4 Schematically shows a schematic structural diagram of a testing platform and a winding assembly proposed according to one embodiment of the present invention; Figure 5 Schematically shows an enlarged view of Figure A according to one embodiment of the present invention; Figure 6 Schematically shows a structural diagram of a detection device proposed according to one embodiment of the present invention; Figure 7 Schematically shows a schematic diagram of the internal structure of a detection device proposed according to one embodiment of the present invention; Figure 8 Schematically shows the internal structure of a cleaning device according to one embodiment of the present invention; Figure 9 Schematically shows a schematic diagram of the internal structure of a cleaning device proposed according to one embodiment of the present invention; Figure 10 Schematically shows a schematic diagram of the internal structure of a cleaning component proposed according to one embodiment of the present invention; Figure 11 The figure schematically shows a partial structural diagram of a cleaning component proposed according to one embodiment of the present invention.

[0018] Numbers in the figure: 1, test table; 11, fixed base; 111, through hole 1; 112, through hole 2; 113, filter screen; 12, unwinding assembly; 121, telescopic rod; 122, connecting block 1; 13, winding assembly; 131, dual-axis motor; 132, connecting column; 1321, bevel gear 1; 1322, connecting rod 1; 1323, bevel gear 2; 1324, connecting block 2; 1325, connecting rod 2; 1326, piston; 133, connecting pipe 2; 14, winding reel; 2, guide wheel 1; 3, guide wheel 2; 4, detection device; 41, bottom Seat; 42. Detection disk; 43. Detection head; 431. Detection magnetic block; 5. Cleaning device; 51. Connecting pipe one; 52. Arc tube; 521. Air hole; 522. Micrometer; 523. Adjustment block; 53. Cleaning assembly; 531. Connecting block three; 532. T-shaped slide; 5321. Elastic part; 533. T-shaped slider; 534. Connecting rod three; 5341. Round hole; 54. Protective shell; 541. U-shaped magnet; 535. Cam; 536. Impeller; 537. Blade ring; 5371. Square groove; 538. Cross ring; 5381. Cutter. DETAILED DESCRIPTION

[0019] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention and should not be regarded as the entire invention or as a limitation or restriction of the technical solution of the present invention.

[0020] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0021] According to one embodiment of the present invention, Figure 1-2 、 Figure 6-8As shown, it includes a detection platform 1, two groups of guide wheels 1 2 are fixedly installed on the upper end of the detection platform 1, and a guide wheel 2 3 is provided on the side where the two groups of guide wheels 1 2 are close to each other, two groups of detection devices 4 are provided between the two groups of guide wheels 2 3, and a cleaning device 5 is fixedly installed between the two groups of detection devices 4. The detection platform 1 includes a fixed base 11, a winding assembly 13 is fixedly installed on one end of the fixed base 11, and a reeling assembly 12 is fixedly installed on the other end of the fixed base 11. The detection device 4 includes a base 41, the base 41 is slidably connected to the fixed base 11, and a detection disk 42 is fixedly installed on the upper end of the base 41. A detection head 43 is slidably provided inside the detection disk 42, and a detection magnetic block 431 is electromagnetically connected to the detection magnetic block 431 and the detection head 43 A sensing element is provided between the two groups, and the cleaning device 5 includes two groups of connecting tubes 51, and the two groups of connecting tubes 51 are connected to the unwinding component 12. The upper ends of the two groups of connecting tubes 51 are fixedly installed with arc tubes 52, and two groups of air holes 521 are opened on the inner side of the arc tube 52. The two groups of air holes 521 are connected to the connecting tube 51, and the interiors of the two groups of air holes 521 are fixedly installed with cleaning components 53. The upper end hinge of the arc tube 52 is hinged with two groups of protective shells 54. When it is necessary to detect the weak points on the outer surface of the colored yarn, the colored yarn disc is placed on the unwinding component 12 for fixing, and another new colored yarn disc is placed on the winding component 13 for fixing. The colored yarn is passed through the guide wheel 1 2, the guide wheel 2 3 in sequence, and then through the detection device 4 and the cleaning device 5. The second group of detection devices 4, guide wheel 2 3 and guide wheel 1 2 are fixed on the colored yarn disk fixed on the winding component 13, and the colored yarn rope is wound by starting the winding component 13, and the colored yarn rope is sampled and tested, and a section of colored yarn rope in the colored yarn disk is selected, and the colored yarn rope of the guide wheel 2 3 and the cleaning device 5 is detected by starting the first group of detection devices 4. After starting the detection device 4, the four groups of detection heads 43 in the detection device 4 approach the colored yarn rope at the same time, and the detection magnetic block 431 pops out from the detection head 43 under the action of magnetism and contacts the colored yarn rope. If there is debris attached to the surface of the colored yarn rope, when the detection magnetic block 431 rubs the colored yarn rope, the charge will move away from the surface of the colored yarn rope with impurities, and the magnetic field changes on the surface of the colored yarn rope through the sensor element. The inspection is carried out to observe whether the surface quality of the colored yarn rope is qualified. At the same time, impurities on the surface of the colored yarn rope may affect the detection of deformation or damage of the colored yarn rope. After the colored yarn rope is inspected for impurities, the reeling component 13 is started a second time to clean the colored yarn rope of the inspection section through the circular arc tube 52. The reeling component 13 drives the cleaning component 53 to clean and remove the impurities on the surface of the colored yarn. At the same time, the colored yarn in the circular arc tube 52 is blown by the reeling component 13. The colored yarn rope passing through the circular arc tube 52 is inspected for cracks on the surface by the second group of inspection devices 4. Since slight damage to the colored yarn rope will make the surface fiber structure uneven, the originally uniform charge distribution will be broken. During the friction process, the charge is more likely to accumulate at and near the damaged part.This results in an increase in local charge density and a stronger electrostatic field. When small damage or fiber breakage occurs on the yarn surface, these locations become charge concentration points. At this point, the detection magnet 431 can be ejected from the detection head 43 under the influence of magnetism and contact the yarn rope. The sensor element detects the magnetic field changes on the yarn rope surface, and then observes whether there are any damages on the yarn rope surface. By sampling and testing the yarn ropes, the quality of the yarn ropes on this group of yarn discs can be inspected.

[0022] Combine Figure 2-3 A through hole 111 and a through hole 2 112 are provided on the fixed base 11. The through hole 111 is connected to the winding assembly 13. A filter 113 is fixedly installed inside the through hole 111. The through hole 111 and the through hole 2 112 are both connected to the two sets of connecting tubes 1 51. When the colored yarn in the arc tube 52 is blown through the winding assembly 13, the wind generated by the winding assembly 13 is filtered through the filter 113 and flows into the through hole 2 112 to blow and clean the colored yarn rope in the arc tube 52, and blow and clean the dust and impurities on the colored yarn rope.

[0023] Combine Figure 2-3 The unwinding assembly 12 includes a telescopic rod 121, the outer side of the telescopic rod 121 is fixedly connected to the fixed base 11, the driving end of the telescopic rod 121 is fixedly installed with a connecting block 122, the connecting block 122 is slidably connected to the fixed base 11, and the end of the connecting block 122 away from the telescopic rod 121 is fixedly installed with a winding disk 14. By placing the colored yarn disk on the unwinding assembly 12 and fixing it by the winding disk 14, the elongation of the colored yarn rope is adjusted by the telescopic rod 121, and the quality detection effect of the colored yarn rope is improved by adjusting the elongation of the colored yarn rope.

[0024] Combine Figure 2-5 The winding assembly 13 includes a dual-axis motor 131, one of the driving ends of the dual-axis motor 131 is fixedly installed with the winding disc 14, the other driving end of the dual-axis motor 131 is fixedly installed with a connecting column 132, the end of the connecting column 132 away from the dual-axis motor 131 is fixedly installed with a bevel gear 1321, the outer side of the bevel gear 1321 is meshed with a bevel gear 2 1323, the lower end of the bevel gear 2 1323 is rotatably installed with a connecting rod 1322, and the connecting rod 1322 is fixedly installed with a bevel gear 1321. One end is fixedly connected to the connecting column 132, and the upper end of the bevel gear 2 1323 is fixedly and rotatably installed with the connecting block 2 1324, and the connecting block 2 1324 is away from the center of the bevel gear 2 1323. The upper end of the connecting block 2 1324 is rotatably installed with the connecting rod 2 1325, and the end of the connecting rod 2 1325 away from the connecting block 2 1324 is rotatably installed with the piston 1326. The outer side of the piston 1326 is provided with the connecting pipe 2 133, and the piston 1326 is slidingly connected to the connecting pipe 2 133.

[0025] Combine Figure 4-5 , one end of the connecting tube 2 133 is fixedly connected to the fixed base 11, one end of the connecting tube 2 133 is connected to the through hole 111, and the other end of the connecting tube 2 133 is rotatably connected to the connecting column 132, by placing the colored yarn disc on the unwinding component 12 for fixing, and placing another new colored yarn disc on the winding component 13 for fixing, by starting the dual-axis motor 131, driving the winding disc 14 at the driving end of the dual-axis motor 131 to rewind, and at the same time, the other driving end of the dual-axis motor 131 drives the bevel gear 1321 to rotate, and the bevel gear The rotation of wheel 1321 drives bevel gear 2 1323 to rotate, and the rotation of bevel gear 2 1323 drives connecting rod 2 1325 to rotate with the axis of bevel gear 2 1323 as the center of the circle, thereby pulling piston 1326 to perform reciprocating motion inside connecting tube 2 133. The airflow generated by piston 1326 flows into through hole 1 111 through connecting tube 2 133, cleaning the colored yarn in the arc tube 52, thereby realizing the detection of whether the surface of the colored yarn rope in the arc tube 52 is cracked when the colored yarn rope passes through the second group of detection devices 4.

[0026] Combine Figure 8-9 Adjustment blocks 523 are installed at both ends of the arc tube 52, and a micrometer 522 is fixedly installed at the lower end of the adjustment block 523. The micrometer 522 is located inside the arc tube 52. By adjusting the micrometer 522, the position of the colored yarn rope and the cleaning component 53 can be adjusted to prevent the cleaning component 53 from causing damage to the colored yarn rope.

[0027] Combine Figure 8-10 A U-shaped magnet 541 is fixedly installed on the inner side of the protective shell 54. By opening the two sets of protective shells 54, the colored yarn rope is passed through the inside of the arc tube 52, and then the protective shell 54 is closed by the U-shaped magnet 541 inside the protective shell 54, thereby protecting the colored yarn rope from dust and improving the detection accuracy.

[0028] Combine Figure 8-11The cleaning assembly 53 includes a connecting block 3 531, a T-shaped slot 532 is provided inside the connecting block 3 531, two sets of T-shaped sliders 533 are slidably installed inside the T-shaped slot 532, and an elastic member 5321 is fixedly installed at one end of the two sets of T-shaped sliders 533 away from each other. One end of the elastic member 5321 is fixedly connected to the connecting block 3 531, and a cam 535 is rotatably installed inside the connecting block 3 531. The cam 535 is fitted with one set of T-shaped sliders 533, and the cam 535 is rotated. The lower end is fixedly mounted with an impeller 536, the upper end of the impeller 536 passes through the connecting block 3 531, and the impeller 536 is located inside the connecting pipe 1 51. The upper ends of the two sets of T-shaped sliders 533 are fixedly mounted with connecting rods 3 534, and the upper ends of the connecting rods 3 534 are provided with a circular hole 5341. A fan ring 537 is rotatably mounted between the two sets of connecting rods 3 534, and a cross ring 538 is fixedly mounted inside the fan ring 537. The fan ring 537 is provided with multiple sets of square grooves 5371. The cross ring 538 A cutter 5381 is fixedly installed inside the device, and the colored yarn rope passes through the circular hole 5341 and the two groups of cross rings 538. The airflow generated by the piston 1326 flows into the through hole 111 from the connecting pipe 2 133, blowing the connecting pipe 1 51. The wind blows the impeller 536 to rotate, which in turn drives the cam 535 to rotate. The rotation of the cam 535 squeezes a group of T-shaped sliders 533 to reciprocate in the T-shaped slide groove 532, and the two groups of connecting The cross ring 538 between the rod three 534 and the two groups of connecting rods three 534 swings left and right. At the same time, the wind from the through hole 111 blows the fan ring 537, driving the fan ring 537 to rotate. Since a distance of 5 mm is reserved between the cutter 5381 inside the cross ring 538 and the colored yarn rope, the cutter 5381 inside the cross ring 538 slightly cuts off the impurities on the surface of the colored yarn rope, thereby reducing the interference of impurities on the colored yarn rope when it passes through the second group of detection devices 4.

[0029] In order to further better explain the above embodiment, the present invention also provides an embodiment, a cleaning device and method for immersion dyeing of colored yarn, comprising the following steps: Step 1: By operating the telescopic rod 121, adjust the elongation of the colored yarn rope to an appropriate range according to the thickness and material characteristics of the colored yarn. The elongation adjustment range is generally 0.5m-2m. For finer silk colored yarn, the elongation can be adjusted to 0.5m-1m; for thicker cotton colored yarn, the elongation can be adjusted to 1m-2m. After the adjustment is completed, place the colored yarn disc firmly on the reel 14 of the unwinding assembly 12 to ensure that the colored yarn disc is firmly installed to prevent shaking or deviation during the detection process; Slide the base 41 of the detection device 4 on the fixed base 11 to a suitable position to ensure that the detection head 43 can accurately cover the area of ​​the colored yarn rope to be detected. The sliding distance can be adjusted within the range of (5-20) cm according to the size of the colored yarn disk and the detection requirements. By adjusting the driving device in the detection disk 42, the detection head 43 can be smoothly moved towards and away from the colored yarn rope. The moving speed of the detection head 43 can be set to 0.1 cm / s-0.5 cm / s; The distance between the colored yarn rope and the cleaning assembly 53 is precisely adjusted by the adjustment blocks 523 at both ends of the two sets of circular arc tubes 52 through the micrometer 522. The general adjustment range is 3mm-8mm. For ordinary colored yarn, the distance can be set to 5mm; for more fragile colored yarn, the distance can be appropriately increased to 7mm-8mm to prevent the cleaning assembly 53 from damaging the colored yarn rope. Step 2: Pass the colored yarn through the two sets of guide wheels 1 (2) in sequence, ensuring that the colored yarn remains centered in the guide wheel groove without any jamming. The spacing of the guide wheels 1 (2) can be adjusted within the range of 5mm-15mm according to the width of the colored yarn. Then pass it through the guide wheel 2 (3). The spacing of the guide wheels 2 (3) can also be adjusted within the range of 3mm-10mm according to the width of the colored yarn, so that the guide wheels 2 (3) can fit the colored yarn rope tightly without excessive squeezing. Then pass it through the first set of detection devices 4, the arc tube 52 of the cleaning device 5, the second set of detection devices 4, the guide wheel 2 (3) and the guide wheel 1 (2) in sequence. Securely fix the two ends of the colored yarn to the starting end of the unwinding assembly 12 and the reel 14 of the rewinding assembly 13, respectively, to ensure that the colored yarn maintains a stable tension during the entire testing process. The tension range can be adjusted between 0.5N-2N according to the material and specifications of the colored yarn. For fine chemical fiber colored yarn, the tension can be controlled between 0.5N-1N; for coarse linen colored yarn, the tension can be adjusted to 1N-2N; Step 3: Start the winding assembly 13, and the dual-axis motor 131 runs, driving the winding disk 14 to wind the colored yarn rope at a set speed. The winding speed is generally set to (0.2-1) m / min. At the same time, start the first set of detection devices 4. Driven by the motor, the four sets of detection heads 43 in the detection disk 42 simultaneously approach the colored yarn rope at a speed of (0.1-0.3) cm / s until the detection magnet 431 is ejected from the detection head 43 under the magnetic effect and contacts the colored yarn rope; When the detection magnetic block 431 rubs against the surface of the colored yarn rope, if there is debris attached to the surface of the colored yarn rope, the charge will be moved away from the part with the impurity due to electrostatic induction, and the sensor element in the detection head 43 will capture the magnetic field change signal on the surface of the colored yarn rope in real time. The sensor element converts the magnetic field change signal into an electrical signal and transmits it to the data processing unit. The data processing unit determines whether the surface quality of the colored yarn rope is qualified based on a preset magnetic field change threshold. The magnetic field change threshold can be set within the range of ± (0.05-0.2) mT according to the material of different colored yarns and the normal surface condition. For cotton colored yarn, the threshold can be set to ± 0.1 mT; for synthetic fiber colored yarn, the threshold can be set to ± 0.15 mT. Step 4: After the impurity detection is completed, the rewinding assembly 13 is started a second time. The other driving end of the dual-axis motor 131 drives the bevel gear 1 1321 to rotate. The bevel gear 1 1321 and the bevel gear 2 1323 engage with each other, causing the bevel gear 2 1323 to rotate at a speed of (5-15) r / min. The rotation of the bevel gear 2 1323 drives the connecting rod 2 1325 to perform a circular motion with its axis as the center of the circle. The piston 1326 is pulled by the connecting rod mechanism to perform a reciprocating motion in the connecting pipe 2 133. The airflow generated by the piston 1326 flows into the through hole 111 through the connecting pipe 2 133, and then enters the arc tube 52 through the connecting pipe 1 51, blowing the colored yarn rope in the arc tube 52. The airflow speed can reach (5-15) m / s, and the dust and impurities on the surface of the colored yarn rope are blown away preliminarily. The airflow blows the impeller 536 in the connecting pipe 1 51 to rotate, and the impeller 536 drives the cam 535 to rotate synchronously. The cam 535 squeezes a group of T-slide blocks 533 on the T-slide according to a specific contour curve. The T-shaped slider 533 moves back and forth in the groove 532 at a frequency of (1-3) times / s, and drives the two sets of connecting rods 534 and the cross ring 538 to shake left and right. At the same time, the airflow blows the fan ring 537 to rotate at a speed of (10-30) r / min. Since the cutter 5381 inside the cross ring 538 is kept at a distance of 5mm from the colored yarn rope, under the synergistic effect of the high-frequency shaking of the cross ring 538 and the high-speed rotation of the fan ring 537, the cutter 5381 slightly cuts off impurities on the surface of the colored yarn rope; Step 5: After cleaning, the colored yarn rope passes through the second set of detection devices 4. The detection magnetic block 431 in the detection head 43 is ejected at a speed of (0.1-0.3) cm / s under the control of the motor to contact the colored yarn rope. Since the colored yarn rope is slightly damaged, the surface fiber structure will be uneven, the charge distribution will change, the local charge density will increase, and the electrostatic field strength will be enhanced. These changes will cause complex changes in the magnetic field on the surface of the colored yarn rope. The sensor element in the detection head 43 not only detects the change in magnetic field intensity, but also detects the change in magnetic field direction through a multi-axis magnetic field sensor. The sensor element transmits the collected magnetic field intensity and direction change data to the data processing unit. The data processing unit uses a pre-established colored yarn crack magnetic field feature database to compare and analyze the collected data. When it is detected that the magnetic field intensity changes sharply within a short distance and the magnetic field direction is abnormally twisted, and the matching degree with the known crack magnetic field features in the database exceeds 80%, it is determined that there is a crack on the surface of the colored yarn rope.

[0030] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. An intelligent detection device for colored yarn quality, characterized by: The invention comprises a detection platform (1), wherein two groups of guide wheels (2) are fixedly mounted on the upper end of the detection platform (1), a guide wheel (3) is provided on the side where the two groups of guide wheels (2) are close to each other, two groups of detection devices (4) are provided between the two groups of guide wheels (3), a cleaning device (5) is fixedly mounted between the two groups of detection devices (4), and the detection platform (1) comprises a fixed base (11), a winding assembly (13) is fixedly mounted on one end of the fixed base (11), and an unwinding assembly (12) is fixedly mounted on the other end of the fixed base (11); The detection device (4) comprises a base (41), the base (41) is slidably connected to the fixed base (11), a detection disk (42) is fixedly mounted on the upper end of the base (41), a detection head (43) is slidably provided inside the detection disk (42), a detection magnetic block (431) is electromagnetically connected inside the detection head (43), and a sensor element is provided between the detection magnetic block (431) and the detection head (43); The cleaning device (5) comprises two groups of connecting tubes (51), both groups of connecting tubes (51) are connected to the unwinding assembly (12), arc tubes (52) are fixedly installed on the upper ends of the two groups of connecting tubes (51), two groups of air holes (521) are opened on the inner side of the arc tube (52), the two groups of air holes (521) are connected to the connecting tube (51), cleaning assemblies (53) are fixedly installed inside the two groups of air holes (521), and two groups of protective shells (54) are hingedly installed on the upper ends of the arc tubes (52).

2. The intelligent detection device for colored yarn quality according to claim 1, characterized in that: The fixed base (11) is provided with a through hole 1 (111) and a through hole 2 (112), the through hole 1 (111) is connected to the winding assembly (13), a filter (113) is fixedly installed inside the through hole 1 (111), and the through hole 1 (111) and the through hole 2 (112) are both connected to the two groups of connecting pipes 1 (51).

3. The intelligent detection device for colored yarn quality according to claim 2, characterized in that: The unwinding assembly (12) includes a telescopic rod (121), the outer side of the telescopic rod (121) is fixedly connected to the fixed base (11), a driving end of the telescopic rod (121) is fixedly mounted with a connecting block 1 (122), the connecting block 1 (122) is slidably connected to the fixed base (11), and a winding disk (14) is fixedly mounted on an end of the connecting block 1 (122) away from the telescopic rod (121).

4. The intelligent detection device for colored yarn quality according to claim 1, characterized in that: The winding assembly (13) includes a double-axis motor (131), one of the driving ends of the double-axis motor (131) is fixedly mounted with a winding disc (14), the other driving end of the double-axis motor (131) is fixedly mounted with a connecting column (132), one end of the connecting column (132) away from the double-axis motor (131) is fixedly mounted with a bevel gear 1 (1321), the outer side of the bevel gear 1 (1321) is meshed with a bevel gear 2 (1323), the lower end of the bevel gear 2 (1323) is rotatably mounted with a connecting rod 1 (1322), and the connecting rod 1 (1322) is fixedly mounted with a bevel gear 2 (1323). One end is fixedly connected to the connecting column (132); the upper end of the bevel gear (1323) is fixedly rotatably mounted with a connecting block (1324); the connecting block (1324) is away from the center of the bevel gear (1323); the upper end of the connecting block (1324) is rotatably mounted with a connecting rod (1325); the end of the connecting rod (1325) away from the connecting block (1324) is rotatably mounted with a piston (1326); a connecting pipe (133) is provided on the outer side of the piston (1326); the piston (1326) is slidably connected to the connecting pipe (133).

5. The intelligent detection device for colored yarn quality according to claim 4, characterized in that: One end of the second connecting pipe (133) is fixedly connected to the fixed base (11), one end of the second connecting pipe (133) is communicated with the first through hole (111), and the other end of the second connecting pipe (133) is rotatably connected to the connecting column (132).

6. The intelligent detection device for colored yarn quality according to claim 1, characterized in that: Adjustment blocks (523) are installed at both ends of the two groups of circular arc tubes (52), and a micrometer (522) is fixedly installed at the lower end of the adjustment block (523), and the micrometer (522) is located inside the circular arc tube (52).

7. The intelligent detection device for colored yarn quality according to claim 6, characterized in that: A U-shaped magnet (541) is fixedly mounted on the inner side of the protective shell (54).

8. The intelligent detection device for colored yarn quality according to claim 1, characterized in that: The cleaning assembly (53) includes a connecting block three (531), a T-shaped groove (532) is provided inside the connecting block three (531), two groups of T-shaped sliders (533) are slidably installed inside the T-shaped groove (532), and an elastic member (5321) is fixedly installed at one end of the two groups of T-shaped sliders (533) away from each other, and one end of the elastic member (5321) is fixedly connected to the connecting block three (531), and a cam (535) is rotatably installed inside the connecting block three (531), and the cam (535) is fitted with one group of the T-shaped sliders (533), and an impeller (536) is fixedly installed at the lower end of the cam (535), and the upper end of the impeller (536) passes through the connecting block three (531), and the impeller (536) is located inside the connecting pipe one (51).

9. The intelligent detection device for colored yarn quality according to claim 8, characterized in that: The upper ends of the two groups of T-shaped sliders (533) are fixedly installed with connecting rods (534), and the upper ends of the connecting rods (534) are provided with circular holes (5341). A fan ring (537) is rotatably installed between the two groups of connecting rods (534). A cross ring (538) is fixedly installed inside the fan ring (537). The fan ring (537) is provided with multiple groups of square grooves (5371), and a cutter (5381) is fixedly installed inside the cross ring (538).

10. A method for intelligent detection of colored yarn quality, applied to the device for intelligent detection of colored yarn quality according to claim 9, characterized in that: The following steps are involved: S1: The colored yarn disc is firmly mounted on the reel (14) of the unwinding assembly (12), and the extension of the colored yarn rope is adjusted by operating the telescopic rod (121), and the extension adjustment range is 0.5m-2m. At the same time, another brand-new colored yarn disc is mounted on the reel (14) of the rewinding assembly (13) for rewinding the colored yarn after detection; the two sets of protective shells (54) of the cleaning device (5) are opened, and the colored yarn rope is guided to pass through the guide wheel 1 (2) and the guide wheel 2 (3) in turn. The distance between the guide wheels can be adjusted within the range of 3mm-15mm according to the width of the colored yarn, and then pass through the first set of detection devices (4), the arc tube (52) of the cleaning device (5), the second set of detection devices (4), the guide wheel 2 (3) and the guide wheel 1 (2) in turn, and finally fixed on the colored yarn disc of the rewinding assembly (13), and the protective shell (54) is closed by using the U-shaped magnet (541) in the protective shell (54); S2: Start the winding assembly (13), the dual-axis motor (131) runs, drives the winding disc (14) to wind the colored yarn rope at a set speed, the winding speed is set at (0.2-1) m / min, starts sampling detection, and synchronously starts the first group of detection devices (4). The four groups of detection heads (43) in the detection disc (42) are driven by the motor and approach the colored yarn rope at a speed of (0.1-0.3) cm / s at the same time until the detection magnetic block (431) is ejected from the detection head (43) under the magnetic effect and contacts the colored yarn rope. The sensor element in the detection head (43) senses the change of the magnetic field on the surface of the colored yarn rope, converts the magnetic field change signal into an electrical signal and transmits it to the data processing unit. The data processing unit judges the surface quality of the colored yarn rope according to the preset magnetic field change threshold value. The magnetic field change threshold value is set within the range of ± (0.05-0.2) mT according to the material of the colored yarn. S3: After the impurity detection is completed, the rewinding assembly (13) is started for the second time, and the other driving end of the double-axis motor (131) drives the bevel gear 1 (1321) to rotate at a high speed. The bevel gear 1 (1321) is meshed with the bevel gear 2 (1323), so that the bevel gear 2 (1323) rotates at a speed of (5-15) r / min, driving the connecting rod 2 (1325) to rotate with its axis as the center of the circle, pulling the piston (1326) to reciprocate at a high speed in the connecting pipe 2 (133). The high-speed airflow generated by the piston (1326) flows into the through hole 1 (111) through the connecting pipe 2 (133), and then enters the connecting pipe 1 (51), blowing the colored yarn rope in the arc pipe (52). The airflow speed can reach (5-15) m / s; the airflow blows the impeller (536) in the connecting pipe 1 (51) to rotate at a high speed, and the impeller (536) drives the cam (535) rotate synchronously, and the cam (535) squeezes a group of T-shaped sliders (533) according to a specific contour curve to move back and forth in the T-shaped slide groove (532) at a frequency of 1-3 times / s. The T-shaped slider (533) drives the two groups of connecting rods (534) and the cross ring (538) to shake left and right at a high frequency. At the same time, the air flow blows the fan ring (537) to rotate at a speed of (10-30) r / min. Since the cutter (5381) inside the cross ring (538) is reserved for 5mm with the color yarn rope, under the synergistic effect of the high-frequency shaking of the cross ring (538) and the high-speed rotation of the fan ring (537), the cutter (5381) slightly cuts off the impurities on the surface of the color yarn rope. In this process, the position of the color yarn rope and the cleaning component (53) can be adjusted by adjusting the micrometer (522) to prevent the cleaning component (53) from damaging the color yarn rope; S4: After the cleaning, the colored yarn rope enters the detection area of ​​the second detection device (4). The detection magnetic block (431) in the detection head (43) is ejected at a speed of (0.1-0.3) cm / s under the control of the motor to contact the colored yarn rope. Due to the slight damage to the colored yarn rope, the surface fiber structure is uneven, which causes the charge distribution to change, the local charge density to increase, and the electrostatic field intensity to increase, thereby causing the complex change of the magnetic field on the surface of the colored yarn rope. The sensor element in the detection head (43) not only detects the change of magnetic field intensity, but also detects the change of magnetic field direction through a multi-axis magnetic field sensor. The sensor element transmits the collected magnetic field intensity and direction change data to the data processing unit. The data processing unit uses the pre-established colored yarn crack magnetic field feature database to compare and analyze the collected data. When it is detected that the magnetic field intensity changes sharply within a short distance (1mm-3mm) and the magnetic field direction is abnormally twisted, and the matching degree with the known crack magnetic field feature in the database exceeds 80%, it is determined that there is a crack on the surface of the colored yarn rope.

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