An on-line measuring instrument for the diameter of an optical fiber preform

Abstract

The utility model relates to optical fiber preform measuring technical field discloses a kind of optical fiber preform diameter on-line measuring instrument, including base, two positioning support frames are fixed on base, semicircular positioning slot is provided in positioning support frame, the bottom of horizontal shift frame is fixed with two sliding blocks, two guide rails are fixed on base, each sliding block is slidably installed on a guide rail, movable ring is rotatably connected in horizontal shift frame, the axis of movable ring coincides with the axis of semicircular positioning slot, laser range finder is respectively fixed in movable ring inside left and right sides, two laser range finders measure axis is completely on the same straight line, horizontal shift mechanism is installed on base and is connected with horizontal shift frame. The utility model is stabilized and supported by positioning support frame preform, and diameter is calculated quickly and accurately in combination with two collinear laser range finders;By rotating mechanism and horizontal shift mechanism, realize preform radial, axial multidirectional measurement;Overall operation is convenient, result is intuitive, satisfy on-line measurement accurate and efficient demand.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber preform measurement technology, and in particular to an online optical fiber preform diameter measuring instrument. Background Technology

[0002] Optical fiber preforms are the core raw material for manufacturing optical fibers. The accuracy of their diameter directly determines the transmission performance and product quality of the subsequent optical fibers. Therefore, during the production process of preforms, it is necessary to conduct real-time and reliable online measurement of their diameter to ensure that the products meet production standards.

[0003] Currently, online measurement equipment for fiber optic preform diameter has significant limitations: most devices can only detect the diameter at a single point on the preform, failing to cover different radial angles and axial positions. This singular measurement method not only struggles to comprehensively reflect the overall diameter distribution of the preform and easily overlooks local dimensional deviations, resulting in insufficient representativeness and accuracy of the measurement results; furthermore, manual adjustment of measurement points or reliance on multiple devices for separate measurements reduces detection efficiency, making it difficult to meet the online monitoring needs of continuous preform production and impacting the stability of the production process and product quality control. Therefore, there is an urgent need to develop an online fiber optic preform diameter measuring instrument that uses a positioning support frame to stably support the preform, combines two collinear laser rangefinders to quickly and accurately calculate the diameter, and displays the result on a PLC screen; utilizes a rotation and traverse mechanism to achieve multi-directional radial and axial measurements of the preform; and provides convenient operation and intuitive results, meeting the requirements for accurate and efficient online measurement to overcome the shortcomings of current practical applications and meet current needs. Utility Model Content

[0004] The purpose of this invention is to provide an online optical fiber preform diameter measuring instrument to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An online optical fiber preform diameter measuring instrument includes a base, a positioning support frame, a transverse frame, a movable ring, a rotating mechanism, a laser rangefinder, and a transverse mechanism. Two positioning support frames are fixed on the base, each with a semi-circular positioning groove for positioning and supporting the optical fiber preform. Two sliders are fixed to the bottom of the transverse frame, and two guide rails are fixed on the base. Each slider is slidably mounted on one guide rail. The movable ring is rotatably connected within the transverse frame, and its axis coincides with the axis of the semi-circular positioning groove. Laser rangefinders are fixed to the left and right sides of the movable ring, with the measuring axes of the two laser rangefinders perfectly aligned. The transverse mechanism is mounted on the base and connected to the transverse frame.

[0006] Preferably, the rotating mechanism includes a first motor, a pinion gear, and a large gear. The first motor is fixed on the transverse frame, and a pinion gear is fixed on the output shaft of the first motor. A large gear meshing with the pinion gear is provided on the lower side of the pinion gear, and the large gear is fixed on the outer side of the movable ring.

[0007] Preferably, the transverse movement mechanism includes a second motor, a lead screw, and a threaded sleeve. The second motor is fixed to the base, the lead screw is rotatably connected to the base, and a threaded sleeve is installed on the lead screw. The threaded sleeve is fixed to the bottom of the transverse movement frame.

[0008] Preferably, the distance between the probes of the two laser rangefinders is a fixed value of 30cm.

[0009] Preferably, a PL controller is installed on the base, and the PL controller is equipped with a display screen and operation buttons. The first motor, the laser rangefinder, and the second motor are electrically connected to the PL controller.

[0010] The beneficial effects of this utility model are as follows: When using this online optical fiber preform diameter measuring instrument, the optical fiber preform is directly supported on two positioning support frames. Then, two laser rangefinders are activated to measure the distance from both sides of the optical fiber preform to the probes of the laser rangefinders. The two measured values ​​are recorded as L1 and L2, respectively. The diameter of the optical fiber preform is recorded as d, and the distance between the probes of the two laser rangefinders is a fixed value of 30cm, recorded as D. Then d = D - L1 - L2, thereby quickly measuring the diameter d of the optical fiber preform and displaying it on the display screen of the PL controller. In addition, the first motor drives the small gear and the large gear to rotate, the large gear drives the movable ring to rotate, and the movable ring drives the two laser rangefinders to rotate, so as to measure different radial positions of the optical fiber preform. The second motor drives the lead screw to rotate, the lead screw drives the threaded sleeve to move, the threaded sleeve drives the transverse frame to move laterally along the guide rail, and the transverse frame drives the movable ring and the laser rangefinders to move laterally, thereby measuring the diameter of the optical fiber preform at different axial positions. In summary, this utility model uses a positioning support frame to stably support the precast rod, and combines two collinear laser rangefinders to quickly and accurately calculate the diameter, which is then displayed on a PLC screen. Through a rotation mechanism and a lateral movement mechanism, it achieves radial and axial multi-directional measurement of the precast rod. Overall, the operation is convenient and the results are intuitive, meeting the requirements for accurate and efficient online measurement. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0012] Figure 2 This is a schematic diagram of the usage state of this utility model.

[0013] Figure 3This is a partial structural schematic diagram of the present invention.

[0014] Legend: 1. Base; 2. Positioning support frame; 201. Semicircular positioning groove; 3. Horizontal movement frame; 301. Slider; 302. Guide rail; 4. Movable ring; 5. Rotation mechanism; 501. First motor; 502. Small gear; 503. Large gear; 6. Laser rangefinder; 7. Horizontal movement mechanism; 701. Second motor; 702. Lead screw; 703. Threaded sleeve; 8. PL controller. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] Specific implementation examples are given below.

[0017] See Figures 1-3 In this embodiment of the present invention, an online optical fiber preform diameter measuring instrument includes a base 1, a positioning support frame 2, a transverse frame 3, a movable ring 4, a rotating mechanism 5, a laser rangefinder 6, and a transverse mechanism 7. Two positioning support frames 2 are fixed on the base 1, and each positioning support frame 2 has a semi-circular positioning groove 201 for positioning and supporting the optical fiber preform. Two sliders 301 are fixed to the bottom of the transverse frame 3, and two guide rails 302 are fixed on the base 1. Each slider 301 is slidably mounted on one guide rail 302. The movable ring 4 is rotatably connected to the transverse frame 3, and the axis of the movable ring 4 coincides with the axis of the semi-circular positioning groove 201. The movable ring 4 rotates left and right. Laser rangefinders 6 are fixed on both sides. The measuring axes of the two laser rangefinders 6 are completely on the same straight line. The distance between the probes of the two laser rangefinders 6 is a fixed value of 30cm, denoted as D. The two laser rangefinders 6 measure the distance from the two sides of the optical fiber preform to the probes of the laser rangefinders 6, and the two measured values ​​are denoted as L1 and L2, respectively. The diameter of the optical fiber preform is denoted as d. Then d = D - L1 - L2, so as to quickly measure the diameter d of the optical fiber preform. The transverse movement mechanism 7 is installed on the base 1 and connected to the transverse movement frame 3. The transverse movement mechanism 7 drives the transverse movement frame 3, the movable ring 4 and the laser rangefinders 6 to move along the axial direction of the optical fiber preform, so as to measure the diameter of the optical fiber preform at different positions along the axial direction.

[0018] The rotating mechanism 5 includes a first motor 501, a pinion 502, and a large gear 503. The first motor 501 is fixed on the transverse frame 3. The pinion 502 is fixed on the output shaft of the first motor 501. The large gear 503 meshes with the pinion 502 on its lower side. The large gear 503 is fixed on the outer side of the movable ring 4. In use, the first motor 501 drives the pinion 502 and the large gear 503 to rotate. The large gear 503 drives the movable ring 4 to rotate. The rotation of the movable ring 4 drives the two laser rangefinders 6 to rotate, so as to measure different radial positions of the optical fiber preform.

[0019] The transverse movement mechanism 7 includes a second motor 701, a lead screw 702, and a threaded sleeve 703. The second motor 701 is fixed on the base 1, the lead screw 702 is rotatably connected to the base 1, and the threaded sleeve 703 is installed on the lead screw 702. The threaded sleeve 703 is fixed to the bottom of the transverse movement frame 3. In use, the second motor 701 drives the lead screw 702 to rotate, the lead screw 702 drives the threaded sleeve 703 to move, the threaded sleeve 703 drives the transverse movement frame 3 to move laterally along the guide rail 302, and the transverse movement frame 3 drives the movable ring 4 and the laser rangefinder 6 to move laterally.

[0020] A PL controller 8 is installed on the base 1. The PL controller 8 is equipped with a display screen and operation buttons. The first motor 501, the laser rangefinder 6, and the second motor 701 are electrically connected to the PL controller 8. The PL controller 8 performs electrical control and displays the measurement data on the display screen of the PL controller 8.

[0021] Working Principle: This online optical fiber preform diameter measuring instrument works by directly supporting the optical fiber preform onto two positioning support frames 2. Then, two laser rangefinders 6 are activated to measure the distances from both sides of the optical fiber preform to the probes of the laser rangefinders 6. These two measurements are recorded as L1 and L2, respectively. The diameter of the optical fiber preform is denoted as d, and the distance between the probes of the two laser rangefinders 6 is a fixed value of 30cm, denoted as D. Therefore, d = D - L1 - L2, thus quickly measuring the diameter d of the optical fiber preform, which is then displayed on the screen of the PL controller 8. Additionally, through the... A motor 501 drives a small gear 502 and a large gear 503 to rotate. The large gear 503 drives a movable ring 4 to rotate, which in turn drives two laser rangefinders 6 to rotate, so as to measure different radial positions of the optical fiber preform. A second motor 701 drives a lead screw 702 to rotate, which in turn drives a threaded sleeve 703 to move. The threaded sleeve 703 drives a transverse frame 3 to move laterally along a guide rail 302, which in turn drives the movable ring 4 and the laser rangefinders 6 to move laterally, thereby measuring the diameter of the optical fiber preform at different axial positions.

[0022] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An online optical fiber preform diameter measuring instrument, characterized in that, The system includes a base (1), a positioning support frame (2), a transverse frame (3), a movable ring (4), a rotating mechanism (5), a laser rangefinder (6), and a transverse mechanism (7). Two positioning support frames (2) are fixed on the base (1). Each positioning support frame (2) has a semi-circular positioning groove (201) for positioning and supporting the optical fiber preform. Two sliders (301) are fixed to the bottom of the transverse frame (3). Two [unclear characters] are fixed on the base (1). Guide rail (302), each slider (301) is slidably mounted on a guide rail (302), the movable ring (4) is rotatably connected to the transverse frame (3), the axis of the movable ring (4) coincides with the axis of the semi-circular positioning groove (201), laser rangefinders (6) are fixed on the left and right sides inside the movable ring (4), the measuring axes of the two laser rangefinders (6) are completely on the same straight line, the transverse mechanism (7) is mounted on the base (1) and connected to the transverse frame (3).

2. The online optical fiber preform diameter measuring instrument according to claim 1, characterized in that, The rotating mechanism (5) includes: a first motor (501), a pinion (502) and a large gear (503). The first motor (501) is fixed on the transverse frame (3). The pinion (502) is fixed on the output shaft of the first motor (501). A large gear (503) meshes with the pinion (502) on its lower side. The large gear (503) is fixed on the outside of the movable ring (4).

3. The online optical fiber preform diameter measuring instrument according to claim 2, characterized in that, The transverse mechanism (7) includes a second motor (701), a lead screw (702) and a threaded sleeve (703). The second motor (701) is fixed on the base (1). The lead screw (702) is rotatably connected to the base (1). The threaded sleeve (703) is installed on the lead screw (702). The threaded sleeve (703) is fixed to the bottom of the transverse frame (3).

4. The online optical fiber preform diameter measuring instrument according to claim 1, characterized in that, The distance between the probes of the two laser rangefinders (6) is a fixed value of 30cm.

5. The online optical fiber preform diameter measuring instrument according to claim 3, characterized in that, A PL controller (8) is installed on the base (1), and the first motor (501), the laser rangefinder (6), and the second motor (701) are electrically connected to the PL controller (8).

Images