Synthetic fiber thickness laser measuring device and measuring method

Abstract

The invention relates to the technical field of laser diameter measurement, in particular to a synthetic fiber thickness laser measuring device and method.The synthetic fiber thickness laser measuring device comprises a measuring unit and a rotating unit, the measuring unit comprises a shell, the front end of the shell is fixedly connected with an extending plate, and the end, away from the shell, of the extending plate is fixedly connected with a laser head; a side supporting plate is fixedly connected to the side edge of the shell, a movable shaft is arranged at the end, away from the shell, of the side supporting plate, the rotating unit comprises a center shaft movably penetrating through the outer surface of the side supporting plate, the outer surface of the center shaft is fixedly sleeved with a support, and the movable shaft is rotationally connected to the inner side of the support; through the linkage design of the central shaft, the support and other parts, the movable shaft and the fibers wound on the movable shaft can rotate around the central shaft, meanwhile, a transmission system is matched, winding and moving of the fibers are achieved, it is ensured that diameters at different positions and different angles are systematically measured, all directions of the cross section of the fibers are effectively covered, and the measurement accuracy is improved. And the accuracy and reliability of a measurement result are obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser diameter measurement, in particular to a laser measuring device and method for measuring the thickness of synthetic fibers. Background Art

[0002] Synthetic fibers are made of synthetic polymer compounds and are widely used in clothing, home textiles, industrial textiles and other fields. To ensure the quality of synthetic fibers, it is necessary to conduct sampling inspections on the produced synthetic fibers. The coarseness detection requires the use of a laser measuring device. By emitting laser pulses to the test sample, when the laser beam encounters an object, it will be partially blocked. By measuring the time or angle at which the laser beam is blocked and combining the speed of the laser scanning and related geometric relationships, the diameter of the object can be calculated.

[0003] After searching, the publication number CN222652161U proposed a movable melt-spinning pitch fiber monofilament diameter measuring device, which includes a spinning device, a collecting device, a portable laser diameter gauge, a movable lifting platform and a camera with a triangular bracket. The movable lifting platform is a combined structure with a platform on the lifting mechanism. The portable laser diameter gauge is placed on the platform of the movable lifting platform. Guide wheels are relatively arranged on one side of the portable laser diameter gauge. The spinning device and the collecting device are relatively arranged on the upper and lower sides of one side of the platform. The camera is installed on the triangular bracket. By moving the triangular bracket, the camera is made to correspond to the digital display screen of the portable laser diameter gauge. The target raw yarn diameter is controlled by adjusting the spinning process parameters, which makes up for the shortcomings of the existing technology in measuring the continuous raw yarn diameter. However, the above patent still has shortcomings in actual use: In the measurement of the thickness of synthetic fibers, when the winding device is winding, the synthetic fibers move horizontally and the posture angle is constant. The existing continuous diameter measurement technology can only detect the surface of the same side of the fiber. Since the cross-section of synthetic fibers is mostly a special-shaped structure, there are differences in the diameters of the same cross-section in different polar angle directions. At the same time, the tension applied by the winding device will cause the fiber to produce anisotropic local deformation, further aggravating the diameter changes at different angles. This makes it impossible for a single measurement at the same point to reflect the true size due to the single angle. The multi-point measurement at the same angle on a straight line is also difficult to reflect the true thickness of the fiber due to the random deformation of each point. The systematic deviation and random error caused by these two factors are superimposed on each other, seriously affecting the accuracy and reliability of the synthetic fiber thickness measurement results.

[0004] Based on this, the present invention discloses a laser measuring device and method for the thickness of synthetic fibers. Summary of the Invention

[0005] In order to solve the problem in the background art that only continuously detecting the same side surface of the synthetic fiber when measuring the diameter of the synthetic fiber will result in low accuracy of the result, the present invention provides a synthetic fiber thickness laser measuring device, which includes a measuring unit and a rotating unit; The measuring unit includes a housing, an extension plate is fixedly connected to the front end of the housing, a laser head is fixedly connected to the end of the extension plate away from the housing, a display unit is provided on the top of the housing, a side support plate is fixedly connected to the side of the housing, and a movable shaft is provided on the end of the side support plate away from the housing; The rotating unit includes a central shaft that is movable and passes through the outer surface of the side support plate, a bracket is fixedly sleeved on the outer surface of the central shaft, and the movable shaft is rotatably connected to the inner side of the bracket; Wherein, a positioning assembly is provided at the end of the central shaft, and a locking assembly is provided on the outer surface of the movable shaft; Wherein, a centering unit is provided on the upper surface of the extension plate; As a further improvement of the present technical solution, the side of the bracket is rotatably connected to a transmission rod, the transmission rod and the central axis are arranged on the same horizontal plane and are perpendicular to each other, the end of the transmission rod away from the bracket is fixedly connected to a bevel gear, the lower bottom surface of the side support plate is fixedly connected to a vertical bracket, the end of the vertical bracket is fixedly connected to a bevel rack, and the bevel gear and the bevel rack are engaged in stages.

[0006] As a further improvement of the present technical solution, a driving wheel is fixedly sleeved on the outer surface of the transmission rod, one end of the movable shaft passing through the bracket is fixedly connected to a driven wheel, and the driving wheel and the driven wheel are meshed and connected via a toothed belt.

[0007] As a further improvement of the present technical solution, the positioning assembly includes a knob arranged at the end of the central shaft, a square rod is fixedly connected to the outer surface of the knob, a square groove is provided at the end of the central shaft, the square rod is slidably connected to the inside of the square groove, positioning rods are symmetrically provided on both sides of the knob, a positioning groove is provided on the outer surface of the side support plate, and the positioning rod slides inside the positioning groove.

[0008] As a further improvement of the present technical solution, the locking assembly includes a ring fixedly mounted on the outer surface of the movable shaft, a balance ring is movably mounted on the outer surface of the ring, thread grooves are provided on the outer surfaces of both ends of the ring, a threaded ring is provided on the inner wall of the balance ring, and a friction plate is fixedly connected to the opposite side of the balance ring.

[0009] As a further improvement of the present technical solution, the centering unit includes an adaptive component arranged on the top surface of the extension plate and an adjustment component arranged based on the adaptive component.

[0010] As a further improvement of the present technical solution, the adaptive component includes a hollow box fixedly connected to the top surface of the extension plate, the interior of the hollow box is slidably connected to a strip rod, the side of the strip rod is fixedly connected to a round rod, and the end of the round rod away from the strip rod is rotatably connected to a positioning wheel.

[0011] As a further improvement of the present technical solution, a sliding rod is distributed in a circular array on the outer surface of the positioning wheel, one end of the sliding rod extending out of the positioning wheel is fixedly connected to an arc-shaped plate, and one end of the sliding rod extending into the positioning wheel is fixedly connected to a pressure plate, and a rubber ring is provided inside the positioning wheel, and the pressure plate surrounds and covers the outer surface of the rubber ring.

[0012] As a further improvement of the present technical solution, the adjustment assembly includes a rotating rod that movably passes through the top surface of the hollow box, the rotating rod is slidably connected to the middle part of the strip rod, the outer surface of the rotating rod is fixedly connected to a support block, the side of the strip rod is penetrated by a through groove, the side of the hollow box is penetrated by a limiting groove, and the strip rod slides inside the limiting groove.

[0013] A method for measuring the thickness of synthetic fibers by laser, according to the above-mentioned synthetic fiber thickness laser measuring device, comprises the following steps: S1. Measurement Preparation: Release a certain length of finished and wound synthetic fiber from the take-up reel, wind its end around the collar on the outside of the device's movable shaft, and rotate the two balancing rings on the collar in opposite directions until the friction plate clamps the synthetic fiber on the outer surface of the collar. Then, straighten the synthetic fiber and wind it around the collar on the other outer ring of the movable shaft to complete the positioning and fixation of the synthetic fiber sample to be measured. At the same time, check whether the laser head, knob, positioning rod and other components are functioning properly. S2. Angle measurement: Pull the knob outward to completely remove the positioning rod from the positioning slot, but keep the square rod in the square slot. Unlock the center axis limiter and retain the driving function. Turn the knob to drive the center axis to rotate and the wound synthetic fiber to rotate synchronously around the center axis. During this process, the laser head measures the synthetic fiber, detecting the diameter length at different angles at the same point, and recording each measurement data. After the measurement is completed, the data is calculated and processed to obtain a more accurate thickness measurement result for the point. S3. Position movement: When the bracket rotates with the central axis, it drives the transmission rod and the bevel gear to rotate. When the bevel gear approaches the vertical bracket and meshes with the bevel rack, it drives the transmission rod to rotate. Through the driving wheel, toothed belt and driven wheel, the movable shaft is driven to rotate synchronously to achieve the winding of the synthetic fiber. One set of positioning components winds up, and the other set releases the synthetic fiber under the action of tensile force. Due to the intermittent meshing of the bevel gear and the bevel rack, each rotation of a fixed angle pulls the synthetic fiber to move a fixed distance. This process is continued to perform multi-angle measurement of synthetic fibers at different positions. S4. Finishing work: After completing all measurements, stop turning the knob, reinsert the positioning rod into the positioning slot, limit the center axis, carefully remove the synthetic fiber wrapped around the movable shaft collar, organize the measurement data, conduct further statistical analysis and archiving, clean the measuring device, and check whether each component is worn or damaged. If there is any problem, repair or replace it in time to prepare for the next measurement.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In this synthetic fiber thickness laser measurement device and measurement method, the rotating unit and the positioning component work together. The positioning component can be used to lock and drive the central axis. The linkage design of the knob, central axis, bracket and other components allows the movable axis and the fiber wrapped around it to rotate around the central axis. During this process, the laser head scans the same point on the fiber at multiple angles to obtain diameter length data at different angles. At the same time, the intermittent meshing of the bevel gear and the bevel rack cooperates with the transmission system to realize the winding and movement of the fiber, ensuring systematic measurement of diameters at different positions and angles, effectively covering all directions of the fiber cross section, and significantly improving the accuracy and reliability of the measurement results.

[0015] 2. In this synthetic fiber thickness laser measurement device and measurement method, by rotating the two balance rings in opposite directions, the friction plate clamps the synthetic fiber wrapped around the outer surface of the ring. The clamping force is controllably adjusted through precise mechanical structure design, which can ensure that the fiber is firmly fixed and avoid fiber deformation caused by excessive clamping force, which affects the measurement accuracy.

[0016] 3. In this synthetic fiber thickness laser measuring device and measurement method, the buffer structure composed of a positioning wheel, an arc plate, a slide rod, a pressure plate and a rubber ring can respond in real time to the pressure generated by the movement of the fiber. When the fiber exerts pressure on the positioning wheel, the arc plate pushes the slide rod and the pressure plate to squeeze the rubber ring, and the elastic deformation of the rubber ring is used to buffer the pressure to prevent the fiber from being deformed by force. At the same time, the annular array distribution of the arc plate and the rotation design of the positioning wheel realize dynamic adjustment of the pressure, reduce the resistance to fiber movement, reduce surface damage, and improve the reliability of the measurement results and the quality and safety of the fiber products. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic structural diagram of the rotating unit of the present invention from a first perspective; Figure 3 This is a schematic structural diagram of the rotating unit of the present invention from a second viewing angle; Figure 4 This is a schematic structural diagram of the cooperation between the positioning assembly and the rotating unit of the present invention; Figure 5It is a structural schematic diagram of the position transformation of the rotating unit of the present invention; Figure 6 is a schematic structural diagram of the fastening assembly of the present invention; Figure 7 It is a structural schematic diagram of the centering unit of the present invention; Figure 8 It is a schematic diagram of the structure inside the positioning wheel of the present invention; Figure 9 It is a structural schematic diagram of the adjustment component of the present invention.

[0018] The meaning of each number in the figure is: 11. Housing; 12. Extension plate; 13. Laser head; 14. Display unit; 15. Side support plate; 16. Movable shaft; 21. Center shaft; 22. Bracket; 23. Transmission rod; 24. Bevel gear; 25. Vertical bracket; 26. Bevel rack; 27. Driving wheel; 28. Driven wheel; 29. Toothed belt; 31. Knob; 32. Square rod; 33. Square groove; 34. Positioning rod; 35. Positioning groove; 41. Ring; 42. Balancing ring; 43. Threaded groove; 44. Threaded ring; 45. Friction plate; 51. Hollow box; 52. Strip rod; 53. Round rod; 54. Positioning wheel; 55. Sliding rod; 56. Arc plate; 57. Pressure plate; 58. Rubber ring; 61. Rotating rod; 62. Support block; 63. Through groove; 64. Limiting groove. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] for Figures 1 to 9 As shown, a laser measuring device and method for measuring the thickness of synthetic fibers include a measuring unit and a rotating unit; The measuring unit includes a housing 11, an extension plate 12 is fixedly connected to the front end of the housing 11, a laser head 13 is fixedly connected to the end of the extension plate 12 away from the housing 11, a display unit 14 is provided on the top of the housing 11, a side support plate 15 is fixedly connected to the side of the housing 11, and a movable shaft 16 is provided on the end of the side support plate 15 away from the housing 11; Move the device precisely to the bottom of the synthetic fiber, align the synthetic fiber with the middle of the movable shaft 16, and then lift the device upward so that the synthetic fiber is stably located between the two movable shafts 16. The laser head 13 emits laser in the direction of the synthetic fiber to measure the thickness, so that the synthetic fiber is stably located between the two movable shafts 16. This positioning method is based on the three-point positioning principle, which ensures that the fiber remains stable during the measurement process and reduces measurement errors caused by shaking.

[0021] like Figures 2 to 5 As shown, the rotating unit includes a central shaft 21 that runs through the outer surface of the side support plate 15, the outer surface of the central shaft 21 is fixedly sleeved with a bracket 22, the movable shaft 16 is rotatably connected to the inner side of the bracket 22, and the side of the bracket 22 is rotatably connected to a transmission rod 23, the transmission rod 23 and the central shaft 21 are arranged on the same horizontal plane and are perpendicular to each other, and one end of the transmission rod 23 away from the bracket 22 is fixedly connected to a bevel gear 24, the lower bottom surface of the side support plate 15 is fixedly connected to a hanging bracket 25, the end of the hanging bracket 25 is fixedly connected to a bevel rack 26, the bevel gear 24 is meshed with the bevel rack 26 in stages, the outer surface of the transmission rod 23 is fixedly sleeved with a driving wheel 27, and one end of the movable shaft 16 that runs through the bracket 22 is fixedly connected to a driven wheel 28, and the driving wheel 27 and the driven wheel 28 are meshed with each other through a toothed belt 29; The positioning assembly includes a knob 31 disposed at the end of the central shaft 21. A square rod 32 is fixedly connected to the outer surface of the knob 31. A square groove 33 is formed at the end of the central shaft 21. The square rod 32 is slidably connected to the inside of the square groove 33. Positioning rods 34 are symmetrically provided on both sides of the knob 31. A positioning groove 35 is formed on the outer surface of the side support plate 15. The positioning rods 34 slide inside the positioning groove 35. Pull the knob 31 outward so that the positioning rod 34 is completely removed from the inside of the positioning groove 35, but the square rod 32 still remains in the inside of the square groove 33. Turning the knob 31 can drive the central shaft 21 to rotate, and the bracket 22 drives the movable shaft 16 and the fiber line wound on the ring 41 to rotate around the central shaft 21, thereby achieving the purpose of changing the angle of the synthetic fiber. The laser head 13 can detect the diameter length of the synthetic fiber at different angles at the same point in the process of measuring the synthetic fiber. The bracket 22 will drive the transmission rod 23 and the bevel gear 23 as it rotates with the central shaft 21. 4 rotates, and when the bevel gear 24 rotates close to the hanging frame 25, it will mesh with the bevel rack 26, thereby driving the transmission rod 23 to rotate, and then driving the movable shaft 16 to rotate synchronously through the transmission of the driving wheel 27, the toothed belt 29 and the driven wheel 28, so as to drive the positioning component on the outer surface of the movable shaft 16 to rotate, thereby realizing the winding of the synthetic fiber and measuring different positions of different synthetic fibers, ensuring that the device can systematically measure the diameters of the fibers at different positions and angles, effectively covering all directions of the fiber cross section, and comprehensively improving the accuracy and reliability of the measurement results.

[0022] like Figure 2 、 Figure 5 and Figure 6 As shown, the locking assembly includes a collar 41 fixedly mounted on the outer surface of the movable shaft 16. A balancing ring 42 is movably mounted on the outer surface of the collar 41. Thread grooves 43 are formed on the outer surfaces of both ends of the collar 41. A threaded ring 44 is formed on the inner wall of the balancing ring 42. A friction plate 45 is fixedly connected to the opposite side of the balancing ring 42. The two balancing rings 42 on the collar 41 are rotated in opposite directions so that the two balancing rings 42 move relative to each other toward the middle of the collar 41 until the friction plate 45 clamps the synthetic fiber wrapped around the outer surface of the collar 41. The clamping force is controllably adjusted through precise mechanical structure design, which ensures that the fiber is firmly fixed while avoiding deformation of the fiber due to excessive clamping force, which affects the measurement accuracy.

[0023] like Figure 7 and Figure 8 As shown, the centering unit includes an adaptive component arranged on the top surface of the extension plate 12 and an adjustment component arranged based on the adaptive component; The adaptive component includes a hollow box 51 fixedly connected to the top surface of the extension plate 12. A strip rod 52 is slidably connected to the interior of the hollow box 51. A round rod 53 is fixedly connected to the side of the strip rod 52. The end of the round rod 53 away from the strip rod 52 is rotatably connected to a positioning wheel 54. The outer surface of the positioning wheel 54 is provided with a circular array of sliding rods 55. The end of the sliding rod 55 extending from the positioning wheel 54 is fixedly connected to an arc plate 56. The end of the sliding rod 55 extending into the positioning wheel 54 is fixedly connected to a pressure plate 57. A rubber ring 58 is provided inside the positioning wheel 54, and the pressure plate 57 surrounds and covers the outer surface of the rubber ring 58. During the stretching movement, the synthetic fiber will exert a compressive force on the positioning wheel 54, which will compress the curved plate 56 to move toward the center of the positioning wheel 54. The curved plate 56 pushes the slide rod 55 and the pressure plate 57 to squeeze the rubber ring 58 to achieve pressure buffering. The elastic deformation of the rubber ring 58 can effectively absorb and buffer the pressure to prevent the fiber from being deformed due to excessive force. The friction between the synthetic fiber and the curved plate 56 will drive the positioning wheel 54 to rotate around the round rod 53, so that the synthetic fiber presses different curved plates 56 in turn during the movement, and the curved plate 56 that is out of contact is quickly reset under the action of the rebound force of the rubber ring 58, realizing real-time dynamic adjustment of the pressure. This buffering protection mechanism not only ensures the stability of the fiber position, but also significantly reduces the resistance of the synthetic fiber during movement, reduces the damage to the synthetic fiber surface caused by friction, and further improves the reliability of the measurement results and the quality and safety of the fiber products.

[0024] like Figure 7 and Figure 9As shown, the adjustment assembly includes a rotating rod 61 that movably passes through the top surface of the hollow box 51. The rotating rod 61 is slidably connected to the middle part of the strip rod 52. The outer surface of the rotating rod 61 is fixedly connected to a support block 62. A through groove 63 is formed through the side of the strip rod 52. A limiting groove 64 is formed through the side of the hollow box 51. The strip rod 52 slides inside the limiting groove 64. Rotate the rotary rod 61 to drive the support block 62 to slide, so that the support block 62 is aligned with the through groove 63 on the side of the strip rod 52, and then push the strip rod 52 up and down to make the strip rod 52 slide along the limit groove 64, thereby adjusting the position of the positioning wheel 54, so that the synthetic fiber is always in the center position of the laser head 13, ensuring the accuracy of the measurement results.

[0025] A method for measuring the thickness of synthetic fibers by laser, using the aforementioned synthetic fiber thickness laser measuring device, comprises the following steps: S1. Measurement Preparation: Release a certain length of finished and wound synthetic fiber from the take-up reel, and wind its end around the collar 41 on the outside of the device's movable shaft 16. Rotate the two balancing rings 42 on the collar 41 in the opposite direction until the friction plate 45 clamps the synthetic fiber on the outer surface of the collar 41. Then, straighten the synthetic fiber and wind it around the collar 41 on the other outer surface of the movable shaft 16. This completes the positioning and fixation of the synthetic fiber sample to be measured. At the same time, check whether the laser head 13, knob 31, positioning rod 34 and other components are functioning properly. S2. Angle measurement: Pull the knob 31 outward to completely remove the positioning rod 34 from the positioning slot 35, but keep the square rod 32 in the square slot 33. Unlock the center shaft 21 and retain the driving function. Turn the knob 31 to drive the center shaft 21 to rotate and the wound synthetic fiber to rotate synchronously around the center shaft 21. During this process, the laser head 13 measures the synthetic fiber, detecting the diameter length of the same point at different angles, and recording each measurement data. After the measurement is completed, the data is calculated and processed to obtain a more accurate thickness measurement result for the point. S3. Position movement: When the bracket 22 rotates with the central shaft 21, it drives the transmission rod 23 and the bevel gear 24 to rotate. When the bevel gear 24 approaches the hanging bracket 25 and meshes with the bevel rack 26, it drives the transmission rod 23 to rotate. The driving wheel 27, the toothed belt 29 and the driven wheel 28 drive the movable shaft 16 to rotate synchronously, realizing the winding of the synthetic fiber. One group of positioning components winds up, and the other group releases the synthetic fiber under the action of the tensile force. Because the bevel gear 24 and the bevel rack 26 are intermittently meshed, each rotation of a fixed angle pulls the synthetic fiber to move a fixed distance. This process is continued, and multi-angle measurement of synthetic fibers at different positions is performed; S4. Finishing work: After completing all measurements, stop turning the knob 31, reinsert the positioning rod 34 into the positioning slot 35, limit the center shaft 21, carefully remove the synthetic fiber wrapped around the ring 41 of the movable shaft 16, organize the measurement data, conduct further statistical analysis and archive, clean the measuring device, check whether each component is worn or damaged, and repair or replace it in time if there is any problem, so as to prepare for the next measurement.

[0026] The technical solution provided by the present invention is divided into two situations when measuring the thickness of synthetic fibers. One is to measure the synthetic fibers in production. Since the synthetic fibers themselves are in a straightened state, the device is accurately moved to the bottom of the synthetic fibers, and the middle part of the movable shaft 16 is used to align the synthetic fibers and then lift the device upward so that the synthetic fibers are stably located between the two movable shafts 16. This positioning method is based on the three-point positioning principle, which ensures that the fibers remain stable during the measurement process and reduces the measurement error caused by shaking. The laser head 13 emits a laser in the direction of the synthetic fibers to measure the thickness. As the automatic winding system of the production line drives the synthetic fibers to continue to move, the measuring device can perform continuous dynamic measurement of different points on the synthetic fibers, and the measured values will be displayed on the display unit 14. The specific measurement structure and measurement principle are existing technologies well known to those skilled in the art and will not be elaborated on here. The second is to measure the thickness of the synthetic fiber that has been produced and wound up. The produced synthetic fiber is released from the winding shaft to a certain length, and then the end is wound on the ring 41 outside the movable shaft 16 of the device. The two balance rings 42 on the ring 41 are rotated in opposite directions so that the two balance rings 42 move relative to the middle position of the ring 41 until the friction plate 45 clamps the synthetic fiber wound on the outer surface of the ring 41. The clamping force is controllable and adjustable through the precise mechanical structure design, which can ensure that the fiber is firmly fixed and avoid deformation of the fiber due to excessive clamping force, which affects the measurement accuracy. Then it is straightened. The synthetic fiber is wound around the collar 41 on the outside of another movable shaft 16 to achieve the positioning and fixation of the synthetic fiber sample to be tested. Then, the knob 31 is pulled outward so that the positioning rod 34 is completely removed from the inside of the positioning groove 35, but the square rod 32 still remains in the inside of the square groove 33, thereby unlocking the limit of the central shaft 21 while retaining the driving effect on the central shaft 21. At this time, turning the knob 31 can drive the central shaft 21 to rotate, and the movable shaft 16 and the fiber line wound on the collar 41 are driven to rotate around the central shaft 21 through the bracket 22, thereby achieving the purpose of changing the angle of the synthetic fiber. The laser head 13 is used for the synthetic fiber. The measurement process can detect the diameter length of the synthetic fiber at different angles at the same point, and then calculate the measurement result of the thickness of the same point. Compared with a single measurement of the same point, the accuracy is higher. In addition, the bracket 22 will drive the transmission rod 23 and the bevel gear 24 to rotate as the central shaft 21 rotates. When the bevel gear 24 rotates close to the hanging bracket 25, it will engage with the bevel rack 26, and then drive the transmission rod 23 to rotate. After the transmission of the driving wheel 27, the toothed belt 29 and the driven wheel 28, the movable shaft 16 is driven to rotate synchronously, which will drive the positioning component on the outer surface of the movable shaft 16 to rotate, and realize the alignment. The synthetic fibers are wound up, while the synthetic fibers wound on the other set of positioning components are automatically released under the action of the tensile force. Moreover, since the meshing of the bevel gear 24 and the bevel rack 26 is intermittent, it is ensured that each rotation angle is fixed to achieve the pulling of the synthetic fibers by a fixed distance, thereby achieving the measurement of different positions of different synthetic fibers. Moreover, after the bevel gear 24 is separated from the bevel rack 26, the rotation of the synthetic fibers is continuous. This design ensures that the device can systematically measure the diameters of the fibers at different positions and angles, effectively covering all directions of the fiber cross section, and comprehensively improving the accuracy and reliability of the measurement results. When measuring the synthetic fiber, in one measuring method, the synthetic fiber slides on the upper part of the movable shaft 16, and the synthetic fiber needs to pass through the lower part of the positioning wheel 54. In the second measuring method, the synthetic fiber is wound upward from the lower part of the movable shaft 16, and the synthetic fiber needs to pass through the upper part of the positioning wheel 54. The rotating rod 61 drives the support block 62 to slide, so that the support block 62 is aligned with the through groove 63 on the side of the strip rod 52, and then the strip rod 52 is pushed up and down so that the strip rod 52 slides along the limiting groove 64 to achieve the effect of adjusting the position of the positioning wheel 54, so that the synthetic fiber is always in the center position of the laser head 13, ensuring the accuracy of the measurement result. In addition, when the synthetic fiber slides on the outer surface of the positioning wheel 54, it will be subject to the limiting adjustment effect of the positioning wheel 54, so there will be an interaction force between the synthetic fiber and the positioning wheel 54, and the synthetic fiber will exert a compressive force on the positioning wheel 54 during the stretching movement. , which will force the curved plate 56 to move toward the center of the positioning wheel 54. The curved plate 56 pushes the slide bar 55 and the pressure plate 57 to squeeze the rubber ring 58 to achieve pressure buffering. The elastic deformation of the rubber ring 58 can effectively absorb and buffer the pressure, preventing the fiber from being deformed due to excessive force. At the same time, since the curved plates 56 are distributed in a ring array around the rubber ring 58, the friction between the synthetic fiber and the curved plates 56 will drive the positioning wheel 54 to rotate around the round rod 53, so that the synthetic fiber presses different curved plates 56 in turn during the movement, and the curved plates 56 that are out of contact are quickly reset under the action of the rebound force of the rubber ring 58, realizing real-time dynamic adjustment of the pressure. This buffer protection mechanism significantly reduces the resistance of the synthetic fiber during movement while ensuring the stability of the fiber position, reduces the damage to the synthetic fiber surface caused by friction, and further improves the reliability of the measurement results and the quality and safety of the fiber products.

[0027] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0028] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A laser measuring device for the thickness of synthetic fibers, characterized in that: It includes a measuring unit and a rotating unit; The measuring unit comprises a housing (11), a front end of the housing (11) is fixedly connected to an extension plate (12), an end of the extension plate (12) away from the housing (11) is fixedly connected to a laser head (13), an upper top of the housing (11) is provided with a display unit (14), a side edge of the housing (11) is fixedly connected to a side support plate (15), and an end of the side support plate (15) away from the housing (11) is provided with a movable shaft (16); The rotating unit comprises a central shaft (21) that is movable and passes through the outer surface of the side support plate (15); a bracket (22) is fixedly sleeved on the outer surface of the central shaft (21); and the movable shaft (16) is rotatably connected to the inner side of the bracket (22); Wherein, a positioning component is provided at the end of the central shaft (21), and a locking component is provided on the outer surface of the movable shaft (16); Wherein, a centering unit is provided on the upper surface of the extension plate (12).

2. The synthetic fiber thickness laser measuring device according to claim 1, characterized in that: The side of the bracket (22) is rotatably connected to a transmission rod (23), the transmission rod (23) and the central axis (21) are arranged on the same horizontal plane and are perpendicular to each other, the end of the transmission rod (23) away from the bracket (22) is fixedly connected to a bevel gear (24), the lower bottom surface of the side support plate (15) is fixedly connected to a hanging frame (25), the end of the hanging frame (25) is fixedly connected to a bevel rack (26), and the bevel gear (24) and the bevel rack (26) are engaged with each other in stages.

3. The laser measuring device for synthetic fiber thickness according to claim 2, characterized in that: The outer surface of the transmission rod (23) is fixedly sleeved with a driving wheel (27), and one end of the movable shaft (16) passing through the bracket (22) is fixedly connected to a driven wheel (28), and the driving wheel (27) and the driven wheel (28) are meshed and connected via a toothed belt (29).

4. The synthetic fiber thickness laser measuring device according to claim 1, characterized in that: The positioning assembly includes a knob (31) arranged at the end of the central shaft (21), a square rod (32) is fixedly connected to the outer surface of the knob (31), a square groove (33) is opened at the end of the central shaft (21), and the square rod (32) is slidably connected inside the square groove (33), positioning rods (34) are symmetrically arranged on both sides of the knob (31), and a positioning groove (35) is opened on the outer surface of the side support plate (15), and the positioning rod (34) slides inside the positioning groove (35).

5. The synthetic fiber thickness laser measuring device according to claim 1, characterized in that: The locking assembly comprises a collar (41) fixedly sleeved on the outer surface of the movable shaft (16); a balancing ring (42) is movably sleeved on the outer surface of the collar (41); thread grooves (43) are provided on the outer surfaces of both ends of the collar (41); a thread ring (44) is provided on the inner wall of the balancing ring (42); and a friction plate (45) is fixedly connected to the opposite side of the balancing ring (42).

6. The synthetic fiber thickness laser measuring device according to claim 1, characterized in that: The centering unit comprises an adaptive component arranged on the top surface of the extension plate (12) and an adjustment component arranged based on the adaptive component.

7. The synthetic fiber thickness laser measuring device according to claim 6, characterized in that: The adaptive component comprises a hollow box (51) fixedly connected to the top surface of the extension plate (12); a strip rod (52) is slidably connected to the interior of the hollow box (51); a round rod (53) is fixedly connected to the side of the strip rod (52); and one end of the round rod (53) away from the strip rod (52) is rotatably connected to a positioning wheel (54).

8. The synthetic fiber thickness laser measuring device according to claim 7, characterized in that: Slide rods (55) are distributed in an annular array on the outer surface of the positioning wheel (54), and one end of the slide rod (55) extending from the positioning wheel (54) is fixedly connected to an arc plate (56), and one end of the slide rod (55) extending into the positioning wheel (54) is fixedly connected to a pressure plate (57). A rubber ring (58) is provided inside the positioning wheel (54), and the pressure plate (57) surrounds and covers the outer surface of the rubber ring (58).

9. The synthetic fiber thickness laser measuring device according to claim 8, characterized in that: The adjustment assembly includes a rotating rod (61) that movably passes through the top surface of the hollow box (51), the rotating rod (61) is slidably connected to the middle of the strip rod (52), the outer surface of the rotating rod (61) is fixedly connected to a support block (62), the side of the strip rod (52) is penetrated by a through groove (63), the side of the hollow box (51) is penetrated by a limiting groove (64), and the strip rod (52) slides inside the limiting groove (64).

10. A method for measuring the thickness of synthetic fibers by laser, according to a synthetic fiber thickness measurement device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Preparation for measurement: Release a certain length of synthetic fiber that has been produced and wound from the winding shaft, wind its end around the collar (41) outside the movable shaft (16) of the device, rotate the two balancing rings (42) on the collar (41) in the opposite direction until the friction plate (45) clamps the synthetic fiber on the outer surface of the collar (41), then straighten the synthetic fiber and wind it around the collar (41) outside another movable shaft (16), and complete the positioning and fixation of the synthetic fiber sample to be measured. At the same time, check whether the laser head (13), knob (31), positioning rod (34) and other components can work normally; S2, angle measurement: pull the knob (31) outward to completely remove the positioning rod (34) from the positioning groove (35), but keep the square rod (32) in the square groove (33), unlock the center shaft (21) limit and retain the driving effect, turn the knob (31) to drive the center shaft (21) to rotate and the wound synthetic fiber to rotate synchronously around the center shaft (21). During this process, the laser head (13) measures the synthetic fiber, detects the diameter length of the same point at different angles, and records each measurement data. After the measurement is completed, the data are calculated and processed to obtain a more accurate coarseness measurement result of the point; S3, position movement: when the bracket (22) rotates with the central shaft (21), the transmission rod (23) and the bevel gear (24) are driven to rotate. When the bevel gear (24) is close to the vertical frame (25) and meshes with the bevel rack (26), the transmission rod (23) is driven to rotate. The driving wheel (27), the toothed belt (29) and the driven wheel (28) drive the movable shaft (16) to rotate synchronously, thereby realizing the winding of the synthetic fiber. One group of positioning components winds up, and the other group releases the synthetic fiber under the action of the tensile force. Since the bevel gear (24) and the bevel rack (26) are intermittently meshed, each rotation is fixed angle, pulling the synthetic fiber to move a fixed distance. This process is continued, and the synthetic fiber at different positions is measured at multiple angles. S4. Finishing work: After completing all measurements, stop turning the knob (31), reinsert the positioning rod (34) into the positioning slot (35), limit the center shaft (21), carefully remove the synthetic fiber wrapped around the ring (41) of the movable shaft (16), organize the measurement data, conduct further statistical analysis and archive, clean the measuring device, check whether each component is worn or damaged, and repair or replace it in time if there is any problem, so as to prepare for the next measurement.

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