Optical fiber appearance automatic detection device

Abstract

The utility model discloses an optical fiber appearance automatic detection device, which comprises an optical fiber transmission module, the optical fiber transmission module comprises at least one pair of delivery wheels, a transmission belt is connected between the pair of delivery wheels, and the transmission belt is used for transmitting optical fibers; the optical fiber cleaning module comprises clamping blocks, the two clamping blocks are arranged on the upper side and the lower side of the conveying belt respectively, and cleaning brushes are arranged on the faces, close to the conveying belt, of the clamping blocks; the optical fiber defect identification module comprises an identification box, and two opposite sides of the identification box are provided with through holes for the transmission belt to pass through; wherein the CCD cameras are arranged at the upper end and the lower end of the identification box, and the CCD cameras are electrically connected with the display screen. According to the utility model, the difficulty of appearance defect detection feature identification is reduced, and the optical fiber is automatically cleaned before and after appearance detection.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber appearance inspection technology, and in particular to an automatic optical fiber appearance inspection device. Background Technology

[0002] In recent years, optical fibers have been widely used in optical communication, lasers, and other fields. With the increasing demand for fiber lasers, laser output power has surged from a few watts to tens of thousands of watts. For the special optical fibers used in high-power fiber lasers, the appearance requirements are extremely stringent.

[0003] Traditionally, the visual inspection of optical fibers relies solely on touch and visual inspection, which cannot fully detect defects in the fiber's fabrication and coating processes. If the fiber has issues such as damaged outer sheath, bright spots, or bright lines, it may burn out or break when exposed to high-power laser light, potentially even causing a safety hazard.

[0004] Chinese Patent (CN202020958904.6) discloses a device for detecting appearance defects and tensile testing of fiber Bragg gratings, comprising: a machine base; a first connecting frame, which is an arc-shaped plate; a lifting mechanism fixed on the machine base and connected to the first connecting frame to drive its lifting and lowering; a second connecting frame, which has an inverted L-shaped structure, with one end fixed on the machine base and the other end extending above the arc-shaped middle part of the first connecting frame; a first clamping mechanism for clamping one end of the fiber Bragg grating to be tested; a tensile testing component fixed on the machine base and located below the arc-shaped middle part of the first connecting frame, which is used to clamp the other end of the fiber Bragg grating to be tested and to detect the tensile force of the fiber Bragg grating; an electron microscope component for capturing a microscopic image of the surface of the fiber Bragg grating to be tested; and a display component connected to the electron microscope component for displaying the captured real-time image. This solution is reliable and can simultaneously perform appearance defect detection and tensile testing of optical fibers. However, the patent has the following problems: (1) The patent uses three electron microscope units to detect the appearance of the optical fiber, and the defect identification effect is not good; (2) The patent does not consider cleaning before and after appearance detection, and the dust and dirt attached to the optical fiber itself are easy to misjudge under the microscope; (3) The patent cannot record the location of defects.

[0005] Therefore, an automatic fiber optic appearance inspection device is proposed to solve the above problems. Summary of the Invention

[0006] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide an automatic fiber appearance inspection device that, based on the fiber end face image, quickly adjusts the angle and achieves rapid connection of polarization-maintaining fibers through cold splicing.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] According to an embodiment of this disclosure, an automatic optical fiber appearance inspection device is provided, comprising:

[0009] An optical fiber transmission module, comprising at least one pair of conveyor wheels, with a conveyor belt connected between the pair of conveyor wheels, the conveyor belt being used to transmit optical fibers;

[0010] The fiber optic cleaning module includes clamping blocks, two clamping blocks are respectively disposed on the upper and lower sides of the conveyor belt, and a cleaning brush is disposed on the side of the clamping block closest to the conveyor belt.

[0011] The fiber optic defect identification module includes an identification box with through holes on opposite sides for a transmission belt to pass through; a CCD camera is installed at the top and bottom of the identification box and is electrically connected to a display screen.

[0012] As a preferred embodiment, the identification box is a dark box, and a light source module is provided on the side of the identification box. The light from the light source module is coupled into the identification box through a through hole.

[0013] As a preferred embodiment, the light source modules are two installed on opposite sides of the recognition box.

[0014] As a preferred embodiment, the fiber optic cleaning modules are two installed on opposite sides of the identification box, and the fiber optic cleaning modules are further away from the identification box than the light source modules.

[0015] As a preferred embodiment, the transmission wheel is driven by a stepper motor.

[0016] As a preferred embodiment, a vertical telescopic structure is provided on one side of the conveyor belt and between the two clamping blocks. The vertical telescopic structure includes a fixed top cylinder in the middle, and telescopic rods are provided at the top and bottom of the fixed top cylinder, with the ends of the telescopic rods connected to the clamping blocks.

[0017] In summary, compared with the prior art, this utility model has the following beneficial effects:

[0018] (1) This application reduces the difficulty of identifying appearance defect detection features by coupling red light emitted by the light source module into the cladding of the optical fiber and detecting in a dark room environment;

[0019] (2) This application uses a stepper motor to drive the transmission disk to rotate. The fiber transmission displacement can be obtained from the step angle and the diameter of the transmission disk. In addition, a CCD camera and a display screen are used to identify fiber defects. When a defect is found, the transmission belt is stopped and recorded. The defect position can be obtained from the step angle. This enables the rapid identification of fiber defects and the automatic recording of defect features and positions. Automatic recording of fiber defect features and positions greatly reduces labor costs.

[0020] (3) This application automatically cleans the optical fiber before and after appearance inspection, which reduces misjudgment caused by dirt in the optical fiber itself in the optical fiber defect characteristics and reduces labor costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the automatic optical fiber appearance inspection device of this utility model;

[0022] Figure 2 This is a schematic diagram of the fiber optic cleaning module of this utility model.

[0023] The numbers and letters in the diagram represent the names of the corresponding components:

[0024] 1. Conveyor wheel; 2. Conveyor belt;

[0025] 3. Fiber optic cleaning module; 30. Clamping block;

[0026] 4. Identification box; 5. CCD camera; 6. Light source module;

[0027] 7. Vertical telescopic structure; 71. Fixed cylinder; 72. Telescopic rod. Detailed Implementation

[0028] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example: Figures 1 to 2 As shown, an automatic fiber optic appearance inspection device includes:

[0030] An optical fiber transmission module, comprising at least a pair of conveyor wheels 1, with a conveyor belt 2 connected between the pair of conveyor wheels 1, the conveyor belt 2 being used to transmit optical fibers;

[0031] The fiber optic cleaning module 3 includes clamping blocks 30, with two clamping blocks 30 respectively disposed on the upper and lower sides of the conveyor belt 2, and a cleaning brush disposed on the side of the clamping block 30 closest to the conveyor belt 2.

[0032] The fiber optic defect identification module includes an identification box 4, with through holes on opposite sides of the identification box 4 for the transmission belt 2 to pass through; a CCD camera 5 is installed at the upper and lower ends of the identification box 4, and the CCD camera 5 is electrically connected to a display screen (not shown).

[0033] In practice, the optical fiber is a transparently clad optical fiber.

[0034] During implementation, the display screen can be any commercially available device capable of displaying a clear image of fiber optic defects.

[0035] In this application, automatic cleaning of optical fibers is achieved by using a conveyor belt to move the optical fiber and a cleaning clamping module to hold the optical fiber.

[0036] Specifically, the identification box 4 is a dark box, and a light source module 6 is provided on the side of the identification box 4. The light from the light source module 6 is coupled into the identification box 4 through a through hole.

[0037] As a preferred embodiment, the light emitted by the light source module 6 is red light, but it is not limited to this and can be adjusted according to the actual situation.

[0038] In this application, red light coupling and a darkroom environment are used to make optical fiber defects more apparent.

[0039] As a preferred embodiment, the light source modules 6 are two installed on opposite sides of the recognition box 4.

[0040] As a preferred embodiment, the fiber optic cleaning modules 3 are two installed on opposite sides of the identification box 4, and the fiber optic cleaning modules 3 are further away from the identification box than the light source module 6.

[0041] As a preferred embodiment, the transmission wheel 1 is driven by a stepper motor.

[0042] In this application, defects are identified by image display, the feedback motor stops, the defect image is automatically saved and recorded, and the defect location is obtained by the motor rotation angle and the diameter of the transmission disk, thus realizing the automatic recording of defect location and features.

[0043] As a preferred embodiment, a vertical telescopic structure 7 is provided on one side of the conveyor belt 2 and between the two clamping blocks 30. The vertical telescopic structure 7 includes a fixed top cylinder 71 located in the middle, and telescopic rods 72 are respectively provided at the top and bottom of the fixed top cylinder 71. The ends of the telescopic rods 72 are connected to the clamping blocks 30.

[0044] In practice, two drive motors can be installed inside the fixed cylinder 71. The drive ends of the drive motors are coaxially connected to transmission gears, which mesh with a rack on the telescopic rod. In this way, the drive motors can drive the telescopic rod to make vertical displacement, thereby allowing the clamping block to move closer to or further away from the conveyor belt, and to clamp or release the optical fiber on the conveyor belt as needed.

[0045] The principle of the automatic optical fiber appearance inspection device in this embodiment is as follows: the optical fiber is held by a transmission disk, and a stepper motor drives the transmission disk to rotate. The optical fiber transmission displacement can be obtained from the step angle and the diameter of the transmission disk. During the optical fiber transmission, the cleaning clamping module holds the optical fiber, cleans the optical fiber, and plays a positioning role. At the same time, the light source module couples red light into the cladding of the optical fiber from the side and puts the detection area in a dark chamber, making the optical fiber defects more obvious. In conjunction with the vision module, the optical fiber defects are identified. When a defect is found, it is recorded and feedback is given to stop the transmission belt. The defect position can be obtained according to the step angle. It can realize the rapid identification of optical fiber defects and the automatic recording of defect characteristics and positions.

[0046] The automatic fiber optic appearance inspection device of this embodiment is used according to the following steps:

[0047] A. Upper clamp: Set the position of the transmission disk to zero and clamp the initial end of the optical fiber to the transmission disk;

[0048] B. Start-up: Start the equipment, the red light source is coupled into the cladding of the optical fiber, the stepper motor drives the transmission disk to rotate, and the optical fiber line is displaced;

[0049] C. Operation: The display screen shows the appearance of the optical fiber in real time and automatically identifies optical fiber defects; the optical fiber cleaning module automatically cleans the optical fiber.

[0050] D. Defect Detection: Upon detecting a defect, the motor stops rotating, the defect image is automatically saved, and the defect location is recorded;

[0051] E. End: After recording is complete, continue to start, repeat the cleaning and defect detection actions until completion, and output the fiber optic appearance inspection results.

[0052] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of this utility model, and all of these fall within the protection scope of this utility model.

Claims

1. An automatic optical fiber appearance inspection device, characterized in that, include: An optical fiber transmission module, comprising at least one pair of conveyor wheels, with a conveyor belt connected between the pair of conveyor wheels, the conveyor belt being used to transmit optical fibers; The fiber optic cleaning module includes clamping blocks, two clamping blocks are respectively disposed on the upper and lower sides of the conveyor belt, and a cleaning brush is disposed on the side of the clamping block closest to the conveyor belt. The fiber optic defect identification module includes an identification box with through holes on opposite sides for a transmission belt to pass through; a CCD camera is installed at the top and bottom of the identification box and is electrically connected to a display screen.

2. The automatic optical fiber appearance inspection device according to claim 1, characterized in that, The identification box is a dark box, and a light source module is provided on the side of the identification box. The light from the light source module is coupled into the identification box through a through hole.

3. The automatic optical fiber appearance inspection device according to claim 2, characterized in that, The light source modules are two installed on opposite sides of the recognition box.

4. The automatic optical fiber appearance inspection device according to claim 3, characterized in that, The fiber optic cleaning modules are two installed on opposite sides of the identification box, with the fiber optic cleaning modules being further away from the identification box than the light source modules.

5. The automatic optical fiber appearance inspection device according to claim 1, characterized in that, The transmission wheel is driven by a stepper motor.

6. The automatic optical fiber appearance inspection device according to claim 1, characterized in that, A vertical telescopic structure is provided on one side of the conveyor belt and between the two clamping blocks. The vertical telescopic structure includes a fixed top cylinder in the middle, and telescopic rods are provided at the top and bottom of the fixed top cylinder, with the ends of the telescopic rods connected to the clamping blocks.

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