Optical fiber end face detection method and system

Abstract

The invention relates to the technical field of optical fiber detection, and provides an optical fiber end face detection method and system, and the method comprises the following steps: S1, setting a closed container, and carrying an optical fiber through a linear module; s2, mounting a detection camera and a background plate on an adjusting platform; s3, the relative position of the detection camera and the background plate is adjusted through the adjusting platform, so that the detection camera and the background plate are oppositely located on the two sides of the optical fiber; s4, adjusting the color of the background plate according to the color of the optical fiber to ensure the contrast ratio; s5, performing photographing detection on the optical fiber through the camera, then driving the detection camera and the background plate to synchronously move relative to the optical fiber through the adjusting platform, and performing photographing detection again after the detection camera and the background plate move in place; and S6, judging the end face state of the optical fiber through image detection. According to the detection method, optical fiber end face defects can be observed more visually; and the background plate and the camera are arranged to be of a movable structure through the adjusting platform, so that multi-angle adjustment can be carried out, and the detection requirement of the special-shaped light end face is met.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber detection, and in particular to a method and system for detecting an optical fiber end face. Background Art

[0002] Optical fiber is a tool that uses total internal reflection of light to transmit light. Since the optical signal transmitted inside it is not affected by electromagnetic fields, it has strong anti-interference capabilities and has been widely used in industrial production and engineering construction. When the end face of the optical fiber is uneven, the light it transmits will be scattered, which will affect the signal strength. When the optical fiber is used or welded, if the end face of the optical fiber is uneven, good welding cannot be achieved, so the optical fiber end face needs to be inspected.

[0003] There are currently three main methods for detecting optical fiber end faces. One is to observe the optical fiber end face manually by visual inspection, another is to use a camera for photo detection, or use a microscope to magnify the optical fiber end face for detection, and the third is to input light into the optical fiber through a light source, and then rely on a light detector to detect the received light signal to determine the status of the optical fiber end face.

[0004] The existing utility model patent, with authorization announcement number CN222618520U, discloses a device for observing and detecting optical fiber end face defects. The device includes an optical fiber kit, an optical fiber fixing structure, an observation mirror structure, a support structure, and an illumination structure. The optical fiber kit is fixed to the top of the support structure via the optical fiber fixing structure. The observation mirror structure is located opposite the optical fiber kit, and the angles of the optical fiber kit and the observation mirror structure are adjustable. The illumination structure is located next to the observation mirror structure to provide directional illumination. The support structure includes a lower base plate, a sleeve base plate, a column sleeve, and a column. The sleeve base plate is fixed to the center of the upper end of the lower base plate. The column sleeve is located at the center of the upper end of the sleeve base plate. The bottom end of the column is fixed to the column sleeve by screws. As in the above technical solution, an optical fiber fixing structure is used to fix the optical fiber kit, and then the optical fiber end face is observed through an observation mirror. Since the optical fiber end face has several structures, such as corner lenses, conical lenses, wedge lenses and hemispherical lenses, and their shapes are different, it is impossible to perform comprehensive inspection of the optical fiber end face through an observation mirror in a single fixed position. Therefore, a new inspection method is needed to observe and inspect the end face of the optical fiber. Summary of the Invention

[0005] In view of this, the present invention proposes a fiber end face detection method and system that can perform comprehensive detection on the fiber end face, so as to solve the problem that the existing fiber optic detection process cannot detect optical fibers with special-shaped end faces.

[0006] The technical solution of the present invention is achieved as follows: In one aspect, the present invention provides a method for detecting an optical fiber end face, comprising the following steps: S1. Set up a sealed container and carry the optical fiber through a linear module; S2. Install the detection camera and background plate on the adjustment platform; S3. Adjust the relative position of the detection camera and the background plate by adjusting the platform so that the detection camera and the background plate are located on both sides of the optical fiber; S4. Adjust the color of the background board according to the color of the optical fiber to ensure contrast; S5: The detection camera and the background plate are kept in a fixed relative position, and the optical fiber is photographed and inspected by the camera. Then, the detection camera and the background plate are synchronously moved relative to the optical fiber by the adjustment platform. After they are in place, the optical fiber is photographed and inspected again. S6, judging the state of the optical fiber end face through image detection.

[0007] On the basis of the above technical solution, preferably, the lens assembly and the photosensitive detection plate are mounted on the adjustment platform; A laser is used to input light into the optical fiber, which then emits the light to the lens assembly for amplification. The amplified light beam is then irradiated onto a photosensitive detection plate to measure the beam shape. The optical fiber end face condition is determined based on the measured beam shape.

[0008] On the other hand, the present invention provides a detection system for detecting the optical fiber end face by the above optical fiber end face detection method, comprising an adjustment platform, a detection camera, a background plate, a lens assembly and a photosensitive detection plate, wherein: The detection camera and lens assembly are set on the adjustment platform and the positions are adjusted synchronously; The background plate and the light-sensitive detection plate are set on the adjustment platform and their positions are adjusted synchronously.

[0009] On the basis of the above technical solution, preferably, the adjustment platform includes a rotating platform, a carrier and a driving member, wherein, The carrier is arranged on the movable end of the rotating platform; The driving member is arranged on the carrier; The detection camera, the background plate, the lens assembly and the photosensitive detection plate are all arranged on the driving member.

[0010] On the basis of the above technical solution, preferably, the driving member includes a first swing arm and a second swing arm, wherein, The first swing arm is rotatably arranged on the carrier, and a first groove is formed on the first swing arm. The background plate and the photosensitive detection plate are arranged in parallel and are both arranged in the first groove. The second swing arm is rotatably arranged on the first swing arm. A second groove is opened on the second swing arm. The detection camera and the lens assembly are arranged in the second groove.

[0011] On the basis of the above technical solution, preferably, the driving member further includes a first motor, a second motor and a connecting shaft, wherein, The first motor is arranged on the carrier, the main shaft of the first motor is connected to one end of the first swing arm, and the other end of the first swing arm is rotatably connected to the carrier; A second motor is provided on one end of the first swing arm rotatably connected to the carrier; One end of the connecting shaft is connected to the main shaft of the second motor, the other end passes through the first swing arm and is connected to one end of the second swing arm, and the other end of the second swing arm is rotationally connected to the first swing arm.

[0012] On the basis of the above technical solution, preferably, the first swing arm and the second swing arm are both in an arc-shaped structure, the arc shape is a semi-elliptical arc, and a notch is opened on the first swing arm; The radius of the second swing arm is smaller than the radius of the first swing arm.

[0013] On the basis of the above technical solution, preferably, a detection component is further included, and the detection component includes a laser, a laser target and a hole plate, wherein, The laser and the laser target are arranged on the carrier relative to each other; The orifice plates are arranged on both ends of the first swing arm and the second swing arm, and the orifice plates are located between the laser and the laser target.

[0014] On the basis of the above technical solution, preferably, the lens assembly includes a third motor, a guide shaft, a lens frame, a lens, a nut seat and a screw rod, wherein: The third motor is arranged on the second swing arm; One end of the guide shaft is connected to the second swing arm; The mirror frame is slidably connected to the guide shaft; The lenses are set in the frames; The nut seat is connected to the mirror frame; One end of the screw rod is connected to the main shaft of the third motor, and the screw rod is matched with the nut seat through threads.

[0015] On the basis of the above technical solution, preferably, the photosensitive detection board includes a back plate and a photosensitive element, wherein: The back plate is connected to the adjustment platform; A plurality of photosensitive elements are arranged on the back plate, and the plurality of photosensitive elements are arranged in a ring array manner and have a plurality of rings.

[0016] The optical fiber end face detection method and detection system of the present invention have the following advantages over the prior art: (1) In this detection method, the optical fiber end face is detected by combining a camera with a background plate. In this way, the color of the background plate can be adjusted according to the color of the optical fiber to obtain a good contrast, which is beneficial to improving the molding quality of the camera. In this way, the defects of the optical fiber end face can be observed more intuitively. At the same time, the background plate and the camera are set as a movable structure with an adjustment platform, so that they can be adjusted at multiple angles to meet the detection requirements of special-shaped optical end faces. (2) In this detection method, a lens assembly and a photosensitive detection plate are also used to detect the optical fiber end face. When light is emitted from the optical fiber end face, the emitted light can be amplified by the lens assembly, and then the shape and intensity of the emitted light can be detected by the photosensitive detection plate, thereby determining the state of the optical fiber end face. (3) In this detection system, the adjustment platform is provided with a first swing arm and a second swing arm, wherein the first swing arm is used to install the background plate and the photosensitive detection plate, and the second swing arm is used to install the detection camera and the lens assembly. In this way, the positions of the two swing arms can be adjusted separately to make the background plate match the detection camera and the photosensitive detection plate match the lens assembly, thereby improving the convenience of application; (4) The first swing arm and the second swing arm are both configured as arc-shaped structures, and are semi-elliptical arcs, so that they have a larger curvature, which is convenient for installing a larger area of ​​background plate and photosensitive detection plate, which is conducive to ensuring the detection effect; at the same time, a slot is opened on the first swing arm, so that the optical fiber can be accommodated during the detection to avoid interference problems; (5) The first swing arm and the second swing arm are integrated into an integrated structure and rotate without interfering with each other. They can be driven separately by the first motor and the second motor, which optimizes the overall volume, occupies less space, and is more convenient to use; (6) In the lens assembly structure, the third motor, the lead screw and the nut seat are used to drive the mirror frame and the lens to move, thus forming an adjustable structure, so that the position of the lens can be adjusted, which can avoid the problem of interference with the optical fiber during the flipping of the swing arm, and thus realize the two detection methods of the detection camera with the background plate and the lens assembly with the photosensitive detection plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 Flowchart of the optical fiber end face detection method of the present invention; Figure 2 is a three-dimensional diagram of the optical fiber end face detection system of the present invention; Figure 3 It is a rear view of the optical fiber end face detection system of the present invention; Figure 4 is a side view of the optical fiber end face detection system of the present invention; Figure 5 For the present invention Figure 4 Middle AA section; Figure 6 It is a front view of the optical fiber end face detection system of the present invention; Figure 7 A structural diagram of a lens assembly of an optical fiber end face detection system according to the present invention; Figure 8 This is a diagram of the storage structure of the optical fiber end face detection system of the present invention; Figure 9 This is a structural diagram of the detection camera and background plate of the optical fiber end face detection system of the present invention; Figure 10 A second structural diagram of the optical fiber end face detection system of the present invention, in which the detection camera cooperates with the background plate; Figure 11 This is a third structural diagram of the optical fiber end face detection system of the present invention, in which the detection camera cooperates with the background plate; Figure 12 This is a structural diagram of the lens assembly and the photosensitive detection board of the optical fiber end face detection system of the present invention; Figure 13 An exploded structural diagram of the optical fiber end face detection system of the present invention; Figure 14 A structural diagram of a detection assembly for an optical fiber end face detection system according to the present invention; Figure 15 Schematic diagram of the optical fiber end face structure.

[0019] In the figure: 1. Adjustment platform; 11. Rotation platform; 12. Carrier; 13. Driving member; 131. First swing arm; 132. Second swing arm; 133. First motor; 134. Second motor; 135. Connecting shaft; 101. First groove; 102. Second groove; 103. Notch; 2. Detection camera; 3. Background plate; 4. Lens assembly; 41. Third motor; 42. Guide shaft; 43. Mirror frame; 44. Lens; 45. Nut seat; 46. Screw; 5. Photosensitive detection plate; 51. Back plate; 52. Photosensitive element; 6. Detection assembly; 61. Laser; 62. Laser target; 63. Orifice plate; 100. Optical fiber. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0021] like Figures 1 to 14 As shown, the optical fiber end face detection method of the present invention includes the following steps: S1. Set up a sealed container and carry the optical fiber through a linear module; S2. Install the detection camera and background plate on the adjustment platform; S3. Adjust the relative position of the detection camera and the background plate by adjusting the platform so that the detection camera and the background plate are located on both sides of the optical fiber; S4. Adjust the color of the background board according to the color of the optical fiber to ensure contrast; S5: The detection camera and the background plate are kept in a fixed relative position, and the optical fiber is photographed and inspected by the camera. Then, the detection camera and the background plate are synchronously moved relative to the optical fiber by the adjustment platform. After they are in place, the optical fiber is photographed and inspected again. S6, judging the state of the optical fiber end face through image detection.

[0022] As mentioned above, in this inspection method, a detection camera is used to take a picture of the optical fiber, and then an image comparison test is performed to determine whether the optical fiber end face is qualified. The specific image comparison related technology is an existing technology and will not be elaborated in detail. Among them, in order to ensure the imaging quality, a background plate is set. Since optical fibers have various colors, to ensure the imaging quality, the optical fibers must have a good contrast with the background. By setting the background plate and making the background plate color adjustable, a good contrast for the optical fiber can be obtained. This can obtain good imaging quality when the detection camera is taking pictures for detection, thereby making the edge contour of the optical fiber clearer, which is conducive to accurately judging the end face defects of the optical fiber, thereby ensuring the detection effect; The detection camera and background plate are installed by adjusting the platform, so that the position relative to the optical fiber can be changed; like Figure 15 As shown, four end face shapes of optical fibers are shown from top to bottom, namely, corner lens, conical lens, wedge lens and hemispherical lens. Conventional single-direction detection cannot obtain a complete image of the optical fiber end face, which leads to the problem of incomplete detection. In this application, the adjustment platform is used to drive the detection camera and the background plate to move, and the optical fiber can be photographed and collected from multiple angles to obtain a more comprehensive image. It has good adaptability and can judge the optical fiber end face status more comprehensively and accurately.

[0023] The optical fiber end face detection method of the present invention further includes: installing a lens assembly and a photosensitive detection plate on an adjustment platform; inputting light into the optical fiber with a laser, the optical fiber emitting the light to the lens assembly for amplification, irradiating the amplified light beam to the photosensitive detection plate, and measuring the shape of the light beam; and determining the state of the optical fiber end face based on the measured light beam shape; As mentioned above, the present invention provides another optical fiber end face detection method, which is to amplify the light emitted from the optical fiber through a lens assembly and then use a photosensitive detection board to detect the light; When the end face of the optical fiber is damaged, the light will be scattered, the emitted light cannot be fully focused, and the output light intensity is weakened. At this time, the light intensity and beam shape detected by the photosensitive detection board will be different from the predetermined standard, so the state of the optical fiber end face can be judged. Specifically, the end face of the optical fiber is relatively small. Therefore, in order to improve the convenience of detection by the photosensitive detection board, the emitted light is amplified by a lens assembly to meet the detection requirements. When amplifying the light beam, in order to avoid shape distortion, a collimating lens can be further provided to make the light beam conform to the light output shape of the optical fiber end face. Specifically, the beam shape is the shape of the light detected by the photosensitive detection board, which, like the light intensity, is controlled by the quality of the optical fiber end face.

[0024] The detection system of the present invention detects the optical fiber end face through the above-mentioned optical fiber end face detection method, and includes an adjustment platform 1, a detection camera 2, a background plate 3, a lens assembly 4, a photosensitive detection plate 5 and a detection assembly 6.

[0025] like Figures 2 to 6 As shown, the detection camera 2 and the lens assembly 4 are set on the adjustment platform 1 and the positions are adjusted synchronously; the background plate 3 and the photosensitive detection plate 5 are set on the adjustment platform 1 and the positions are adjusted synchronously; As shown in the above structure, the detection camera 2 and the lens assembly 4 are integrated into a group and can be adjusted synchronously; the background plate 3 and the photosensitive detection plate 5 are integrated into a group and can be adjusted synchronously. In this way, when performing detection, the detection camera 2 can be opposite to the background plate 3, and the lens assembly 4 can be opposite to the photosensitive detection plate 5, so as to ensure the realization of photo detection, beam shape detection, and light intensity detection.

[0026] like Figures 3 to 5 As shown, the adjustment platform 1 includes a rotating platform 11, a carrier 12 and a driving member 13, wherein the carrier 12 is arranged on the movable end of the rotating platform 11; the driving member 13 is arranged on the carrier 12; the detection camera 2, the background plate 3, the lens assembly 4 and the photosensitive detection plate 5 are all arranged on the driving member 13; As shown in the above structure, the adjustment platform 1 is a multi-degree-of-freedom platform, which drives the carrier 12 and the driving member 13 to move through the rotating platform 11, thereby driving the detection camera 2, the background plate 3, the lens assembly 4 and the photosensitive detection plate 5 to rotate; The driving member 13 can also independently drive the detection camera 2, the background plate 3, the lens assembly 4 and the photosensitive detection plate 5 to adjust other degrees of freedom, thereby realizing multi-angle image acquisition of the optical fiber end face.

[0027] like Figure 5 、 Figure 12 and Figure 13 As shown, the driving member 13 includes a first swing arm 131 and a second swing arm 132, wherein the first swing arm 131 is rotatably mounted on the carrier 12, and a first groove 101 is defined on the first swing arm 131. The background plate 3 and the photosensitive detection plate 5 are arranged in parallel and are both disposed in the first groove 101; the second swing arm 132 is rotatably mounted on the first swing arm 131, and a second groove 102 is defined on the second swing arm 132. The detection camera 2 and the lens assembly 4 are disposed in the second groove 102. As shown in the above structure, the second swing arm 132 is arranged on the first swing arm 131, and the second swing arm is provided with a second groove 102 for mounting the detection camera 2 and the lens assembly 4, and the background plate 3 and the photosensitive detection plate 5 are mounted on the first swing arm 131; Since the second swing arm 132 is rotatably connected to the first swing arm 131, it can synchronously drive the detection camera 2 and the lens assembly 4 to move relative to the background plate 3 and the photosensitive detection plate 5 on the first swing arm 131, so that the background plate 3 and the detection camera 2 are opposite to each other, or the lens assembly 4 and the photosensitive detection plate 5 are opposite to each other, so as to reach the detection position; This structural setting has the advantages of a compact overall structure, is easy to install and use, and can meet the detection requirements of optical fibers.

[0028] like Figures 5 to 10 As shown, the driving member 13 further includes a first motor 133, a second motor 134 and a connecting shaft 135, wherein the first motor 133 is disposed on the carrier 12, the main shaft of the first motor 133 being connected to one end of the first swing arm 131, the other end of which is rotatably connected to the carrier 12; the second motor 134 is disposed on one end of the first swing arm 131 being rotatably connected to the carrier 12; one end of the connecting shaft 135 is connected to the main shaft of the second motor 134, the other end of which passes through the first swing arm 131 and is connected to one end of the second swing arm 132, the other end of which is rotatably connected to the first swing arm 131; As described above, the first swing arm 131 is driven by the first motor 133 , and the second swing arm 132 is driven by the second motor 134 ; The first swing arm 131 is directly connected to the carrier 12, so the first motor 133 is provided on the carrier 12 to drive the first swing arm 131 to rotate; The second swing arm 132 is connected to the first swing arm 131 , so the second motor 134 is disposed on the first swing arm 131 and further connected to the second swing arm 132 to drive the second swing arm 132 to rotate relative to the first swing arm 131 ; In this structure, the first swing arm 131 and the second swing arm 132 are coaxial drive structures, so the structure is easy to lay out and install, easy to form, and has the advantage of small size.

[0029] like Figure 2 、 Figure 3 、 Figure 12 and Figure 13 As shown, the first swing arm 131 and the second swing arm 132 are both arc-shaped structures, and the arc shape is a semi-elliptical arc, and a notch 103 is opened on the first swing arm 131; the radius of the second swing arm 132 is smaller than the radius of the first swing arm 131; As shown in the above structure, the first swing arm 131 and the second swing arm 132 are both configured as arc-shaped structures, and are semi-elliptical arcs. This has a large curvature, which facilitates the installation of a larger background plate 3 and a photosensitive detection plate 5 on the first swing arm 131 without interfering with the second swing arm 132, thereby ensuring the detection effect. like Figure 13 As shown, the first swing arm 131 is configured as two parts, and the two parts are connected by the background plate 3 and the photosensitive detection plate 5. The connection point is the first groove 101. The background plate 3 and the photosensitive detection plate 5 serve as connecting parts for transmitting power. Furthermore, in order to prevent damage to the background plate 3 and the photosensitive detection plate 5, a connecting bracket is provided to connect the two parts of the first swing arm 131, and the photosensitive detection plate 5 is mounted on the connecting bracket; Specifically, the background plate 3 and the first swing arm 131 are connected with a detachable structure, so that when the photosensitive detection plate 5 needs to work, the background plate 3 can be removed to avoid interference; Specifically, the first swing arm 131 and the second swing arm 132 are in a concentric state when stored. To avoid interference, the first swing arm 131 and the second swing arm 132 are not tightly attached, but a certain distance is left between them.

[0030] like Figure 9 and Figure 10 As shown, when inspecting an optical fiber, the inspection camera 2 can be selectively located on the upper or lower side of the optical fiber, while the background plate 3 is located on the other side, so that the optical fiber can be photographed and inspected; like Figure 11As shown, the detection camera 2 and the background plate 3 can also be located on the left and right sides of the optical fiber for photo detection. For this structure, a slot 103 is provided on the first swing arm 131 for the optical fiber to pass through, thereby avoiding interference problems. In some embodiments, the first swing arm 131 may be configured to be thinner to avoid interference with the optical fiber.

[0031] like Figure 14 As shown, the detection assembly 6 includes a laser 61, a laser target 62, and a hole plate 63, wherein the laser 61 and the laser target 62 are arranged on the carrier 12 opposite to each other; the hole plate 63 is provided on both ends of the first swing arm 131 and the second swing arm 132, and the hole plate 63 is located between the laser 61 and the laser target 62; As described above, the detection assembly 6 is used to detect the relative positions of the first swing arm 131 and the second swing arm 132, and then determine the accuracy of the first motor 133 and the second motor 134; Specifically, when the detection system is in the storage position, the orifice plate 63 on the first swing arm 131 and the second swing arm 132 will be located between the laser 61 and the laser target 62. If there is a position deviation, the laser emitted by the first laser 61 will be blocked by the orifice plate 63 and cannot be received by the laser target 62. At this time, the first motor 133 and the second motor 134 need to be corrected and repaired. When the laser can completely pass through the orifice plate 63 and be received by the laser target 62, the positions of the first swing arm 131 and the second swing arm 132 are accurate, and the detection operation can be performed, thereby ensuring the application stability of the detection system.

[0032] like Figure 8 and Figure 12 As shown, the lens assembly 4 includes a third motor 41, a guide shaft 42, a mirror frame 43, a lens 44, a nut seat 45 and a screw rod 46, wherein the third motor 41 is arranged on the second swing arm 132; one end of the guide shaft 42 is connected to the second swing arm 132; the mirror frame 43 is slidably connected to the guide shaft 42; the lens 44 is arranged in the mirror frame 43; the nut seat 45 is connected to the mirror frame 43; one end of the screw rod 46 is connected to the main shaft of the third motor 41, and the screw rod 46 and the nut seat 45 are engaged by threads; As shown in the above structure, the lens assembly 4 is used to amplify and shape the light emitted from the optical fiber, wherein a plurality of lenses 44 are provided in the lens frame 43 to achieve the above functions; like Figure 8 and Figure 10As shown, when the detection system is in the storage state or the detection state, in order to avoid interference between the lens 44 and the optical fiber, the lens 44 is connected to the screw rod 46 through the lens frame 43 and the nut seat 45. In this way, the screw rod 46 can be driven to rotate by the third motor 41, thereby driving the lens frame 43, the lens 44 and the nut seat 45 to move synchronously to achieve the effect of avoidance, and the interference detection camera 2 is placed for detection; like Figure 11 As shown, when the light beam shape and light intensity are detected, the first swing arm 131 and the second swing arm 132 form a ninety-degree angle. At this time, the third motor 41, the screw rod 46 and the nut seat 45 drive the mirror frame 43 and the lens 44 to move so that the lens 44 is aligned with the end of the optical fiber. In this way, the emitted light of the optical fiber will pass through the lens 44 and illuminate the photosensitive detection plate 5, thereby realizing the detection of the light beam shape and light intensity, thereby determining the end state of the optical fiber; Specifically, the optical fiber is clamped by a clamping mechanism, which is driven by a linear module, so that the optical fiber can be moved closer to or farther away from the lens assembly 4 to achieve spacing adjustment and avoid structural interference problems during detection; Specifically, the background plate 3 is connected to the first swing arm 131 in a detachable manner. When it is necessary to perform optical fiber detection through the lens assembly 4 and the photosensitive detection plate 5, the background plate 3 can be removed.

[0033] like Figure 13 As shown, the photosensitive detection board 5 includes a back plate 51 and a photosensitive element 52, wherein the back plate 51 is connected to the adjustment platform 1; a plurality of photosensitive elements 52 are provided on the back plate 51, and the plurality of photosensitive elements 52 are arranged in a ring array and have a plurality of rings; As shown in the above structure, the photosensitive detection board 5 is composed of a back plate 51 and a photosensitive element 52, wherein a plurality of photosensitive elements 52 are provided. Thus, when performing detection, the shape of the light beam can be determined according to the layout of the photosensitive elements 52 detecting the light, and the light intensity can also be determined. Specifically, the photosensitive element 52 is a photoresistor, and the optical fiber strength can be judged by the resistance value, thereby judging whether the light end face is normal.

[0034] Specific implementation steps: First, the optical fiber 100 is supplied. Then, the first swing arm 131 is driven by the first motor 133, and the second swing arm 132 is driven by the second motor 134, so that the inspection camera 2 and the background plate 3 are positioned on opposite sides of the optical fiber 100. Then, the inspection camera 2 can be used for photo inspection. Afterwards, according to the detection requirements, the first swing arm 131 and the second swing arm 132 are adjusted to a ninety-degree angle, and the third motor 41 is used to drive the screw rod 46 to rotate, thereby driving the nut seat 45, the mirror frame 43 and the lens 44 to move synchronously, so that the lens 44 corresponds to the end of the optical fiber 100. At this time, the background plate 3 is removed, so that the light emitted by the optical fiber will be magnified and collimated by the lens of the lens assembly 4, and projected onto the photosensitive detection plate 5, so as to obtain the light beam shape and light intensity, and then the end face state of the optical fiber 100 can be judged.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for detecting an optical fiber end face, characterized in that: The following steps are involved: S1. Set up a sealed container and carry the optical fiber through a linear module; S2. Install the detection camera and background plate on the adjustment platform; S3. Adjust the relative position of the detection camera and the background plate by adjusting the platform so that the detection camera and the background plate are located on both sides of the optical fiber; S4. Adjust the color of the background board according to the color of the optical fiber to ensure contrast; S5: The detection camera and the background plate are kept in a fixed relative position, and the optical fiber is photographed and inspected by the camera. Then, the detection camera and the background plate are synchronously moved relative to the optical fiber by the adjustment platform. After they are in place, the optical fiber is photographed and inspected again. S6, judging the state of the optical fiber end face through image detection.

2. The optical fiber end face detection method according to claim 1, wherein: Also includes: Mount the lens assembly and the photosensitive detection plate on the adjustment platform; A laser is used to input light into the optical fiber, which then emits the light to the lens assembly for amplification. The amplified light beam is then irradiated onto a photosensitive detection plate to measure the beam shape. The optical fiber end face condition is determined based on the measured beam shape.

3. A detection system for detecting an optical fiber end face using the optical fiber end face detection method according to claim 2, characterized in that: It comprises an adjustment platform (1), a detection camera (2), a background plate (3), a lens assembly (4) and a photosensitive detection plate (5), wherein: The detection camera (2) and the lens assembly (4) are arranged on the adjustment platform (1) and their positions are adjusted synchronously; The background plate (3) and the photosensitive detection plate (5) are arranged on the adjustment platform (1), and their positions are adjusted synchronously.

4. The detection system according to claim 3, wherein: The adjustment platform (1) comprises a rotating platform (11), a carrier (12) and a driving member (13), wherein: The carrier (12) is arranged on the movable end of the rotating platform (11); The driving member (13) is arranged on the carrier (12); The detection camera (2), the background plate (3), the lens assembly (4) and the photosensitive detection plate (5) are all arranged on the driving member (13).

5. The detection system according to claim 4, wherein: The driving member (13) comprises a first swing arm (131) and a second swing arm (132), wherein: The first swing arm (131) is rotatably arranged on the carrier (12), and a first groove (101) is provided on the first swing arm (131). The background plate (3) and the photosensitive detection plate (5) are arranged in parallel and are both arranged in the first groove (101). The second swing arm (132) is rotatably arranged on the first swing arm (121); a second groove (102) is provided on the second swing arm (132); and the detection camera (2) and the lens assembly (4) are arranged in the second groove (102).

6. The detection system according to claim 5, wherein: The driving member (13) further includes a first motor (133), a second motor (134) and a connecting shaft (135), wherein: The first motor (133) is arranged on the carrier (12), the main shaft of the first motor (133) is connected to one end of the first swing arm (131), and the other end of the first swing arm (131) is rotatably connected to the carrier (12); The second motor (134) is arranged on one end of the first swing arm (131) that is rotatably connected to the carrier (12); One end of the connecting shaft (135) is connected to the main shaft of the second motor (134), and the other end passes through the first swing arm (131) and is connected to one end of the second swing arm (132). The other end of the second swing arm (132) is rotationally connected to the first swing arm (131).

7. The detection system according to claim 5 or 6, wherein: The first swing arm (131) and the second swing arm (132) are both arc-shaped structures, the arc shape is a semi-elliptical arc, and a notch (103) is provided on the first swing arm (131); The radius of the second swing arm (132) is smaller than the radius of the first swing arm (131).

8. The detection system according to claim 5 or 6, wherein: It also includes a detection component (6), which includes a laser (61), a laser target (62) and a hole plate (63), wherein: The laser (61) and the laser target (62) are arranged on the carrier (12) opposite to each other; The orifice plate (63) is provided on both ends of the first swing arm (131) and the second swing arm (132), and the orifice plate (63) is located between the laser (61) and the laser target (62).

9. The detection system according to claim 5 or 6, wherein: The lens assembly (4) comprises a third motor (41), a guide shaft (42), a lens frame (43), a lens (44), a nut seat (45) and a screw rod (46), wherein: The third motor (41) is arranged on the second swing arm (132); One end of the guide shaft (42) is connected to the second swing arm (132); The mirror frame (43) is slidably connected to the guide shaft (42); The lens (44) is arranged in the frame (43); The nut seat (45) is connected to the mirror frame (43); One end of the screw rod (46) is connected to the main shaft of the third motor (41), and the screw rod (46) and the nut seat (45) are threadedly engaged.

10. The detection system according to any one of claims 3 to 6, wherein: The photosensitive detection plate (5) comprises a back plate (51) and a photosensitive element (52), wherein: The back plate (51) is connected to the adjustment platform (1); A plurality of the photosensitive elements (52) are arranged on the back plate (51), and the plurality of photosensitive elements (52) are arranged in a ring array and have a plurality of rings.

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