A device for detecting appearance defects of a fiber ceramic ferrule

Abstract

The utility model discloses a kind of optical fiber ceramic ferrule appearance defect detection devices, including bottom plate, rotating table, workpiece clamping mechanism, camera mechanism and light supplement mechanism, the rotating table fixed installation is at the center position at the top of bottom plate, the workpiece clamping mechanism fixed installation is on the rotating end of rotating table, the camera mechanism fixed installation is at the top of bottom plate, the light supplement mechanism is clamped on camera mechanism above.The utility model is through the multi-view design of three side camera components and an upper camera component, 360 ° rotation of collocation rotating table, realize the full surface coverage detection of the side and end surface of ferrule, without manual adjustment posture, avoid defect omission, detection comprehensiveness is greatly promoted, industrial CCD camera collocation telecentric lens, can accurately identify tiny defect, detection precision is greatly promoted compared with manual work;While light supplement lamp oblique irradiation design enhances defect contrast, further improve identification accuracy, effectively reduce missed detection, misjudgment.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber ceramic ferrule testing technology, specifically to an optical fiber ceramic ferrule appearance defect detection device. Background Technology

[0002] The fiber optic ceramic ferrule is the core component of a fiber optic connector, and its appearance quality directly affects the stability and reliability of fiber optic signal transmission.

[0003] Existing visual inspection methods are mostly manual, relying on visual observation, which makes it difficult to identify defects such as tiny scratches and minor cracks. Furthermore, fatigue and subjective judgment can easily lead to missed or false detections, resulting in poor product quality consistency. Traditional semi-automatic inspection equipment often uses single-view photography, requiring manual adjustment of the ferrule's posture to inspect the entire surface. This is cumbersome and prone to missing defects due to posture adjustment errors. In addition, the lack of targeted supplementary lighting design results in low contrast between defective areas and normal surfaces, making it difficult for the camera to clearly capture defect features and affecting inspection accuracy. To address these issues, we propose a visual defect inspection device for fiber optic ceramic ferrules to solve the problems mentioned in the background. Utility Model Content

[0004] The purpose of this invention is to provide a device for detecting appearance defects in optical fiber ceramic ferrules, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fiber optic ceramic ferrule appearance defect detection device, comprising a base plate, a rotary table, a workpiece clamping mechanism, a camera mechanism, and a supplementary lighting mechanism. The rotary table is fixedly installed at the center of the top of the base plate, the workpiece clamping mechanism is fixedly installed on the rotating end of the rotary table, the camera mechanism is fixedly installed on the top of the base plate, and the supplementary lighting mechanism is snapped onto the camera mechanism.

[0006] Furthermore, the workpiece clamping mechanism includes a chuck, a centering sleeve is fixedly connected to the center position of the top of the chuck, an optical fiber ceramic ferrule body is inserted into the centering sleeve, three grooves are equidistantly arranged around the top of the chuck, and a jaw is fixedly connected to the side of the inner wall of the groove through a pneumatic push rod, and a clamping seat is fixedly connected to the side of the jaw near the optical fiber ceramic ferrule body.

[0007] Furthermore, the camera mechanism includes a first frame rod, and the number of the first frame rods is three, which are equidistantly mounted around the top of the base plate. The end of the first frame rod away from the base plate is fixedly connected to a mounting base, and a side camera assembly is mounted on the side of the mounting base corresponding to the workpiece clamping mechanism.

[0008] Furthermore, a second support rod is fixedly installed on the top of the mounting base, one end of the three second support rods is fixedly connected by a top block, and an upper camera assembly is fixedly installed on the bottom of the top block.

[0009] Furthermore, the supplementary lighting mechanism includes a ring frame, with three arc-shaped sleeves equidistantly mounted around the top of the ring frame, the three arc-shaped sleeves respectively engaging with three second support rods, and three supplementary lights equidistantly mounted around the bottom of the ring frame.

[0010] Furthermore, both the side camera assembly and the top camera assembly employ industrial CCD cameras, and the fill light illuminates the outer surface of the fiber optic ceramic ferrule at a certain angle.

[0011] Furthermore, a positioning ring plate is fixedly connected to the surface of the second frame rod, and the side of the positioning ring plate is in contact with the side of the arc-shaped sleeve.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention utilizes a multi-view design with three side camera components and one top camera component, combined with a 360° rotating stage, to achieve full surface coverage inspection of the sides and ends of the ferrule. This eliminates the need for manual posture adjustments, preventing defect omissions and significantly improving overall inspection comprehensiveness. The industrial CCD camera paired with a telecentric lens can accurately identify minute defects, greatly improving inspection accuracy compared to manual methods. Simultaneously, the oblique illumination design of the supplementary lighting enhances defect contrast, further improving identification accuracy and effectively reducing missed and false detections. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the workpiece clamping mechanism of this utility model;

[0016] Figure 3 This is a schematic diagram of the camera mechanism of this utility model;

[0017] Figure 4 This is a schematic diagram of the supplementary lighting mechanism of this utility model.

[0018] In the diagram: 1. Base plate; 2. Rotary table; 3. Workpiece clamping mechanism; 31. Chuck; 32. Centering bushing; 33. Fiber optic ceramic ferrule body; 34. Pneumatic push rod; 35. Claw; 36. Clamping seat; 4. Camera mechanism; 41. First support rod; 42. Mounting seat; 43. Side camera assembly; 44. Second support rod; 45. Top block; 46. Upper camera assembly; 47. Positioning ring plate; 5. Lighting mechanism; 51. Ring frame; 52. Arc-shaped ferrule; 53. Lighting lamp. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-4 A device for detecting appearance defects in fiber optic ceramic ferrules includes a base plate 1, a rotating stage 2, a workpiece clamping mechanism 3, a camera mechanism 4, and a supplementary lighting mechanism 5. The base plate 1 is a circular metal plate with several mounting holes evenly spaced around it. It is fixed to the table surface with bolts, which can effectively reduce the impact of vibration on the detection accuracy. The rotating stage 2 is fixedly installed at the center of the top of the base plate 1. It adopts an electric indexing stage with a built-in servo motor, which can realize 360° continuous rotation or intermittent indexing rotation. The rotation speed of the rotating stage 2 can be precisely adjusted by an external controller to ensure that the entire surface of the ferrule can be uniformly photographed without any blind spots.

[0021] The workpiece clamping mechanism 3 is bolted to the rotating end of the rotary table 2. It includes a chuck 31, a centering sleeve 32, a fiber optic ceramic ferrule body 33, a pneumatic push rod 34, jaws 35, and a clamping seat 36. The chuck 31 is a circular aluminum alloy structure. A centering sleeve 32 is welded to the center of the top of the chuck 31. The centering sleeve 32 is made of wear-resistant ceramic material, and its inner diameter is slightly larger than the outer diameter of the fiber optic ceramic ferrule body 33 to ensure coaxiality of the ferrule and prevent misalignment. The top of the chuck 31, etc. The fiber optic ceramic ferrule has three grooves around it. A pneumatic push rod 34 is fixedly installed on the side of the inner wall of the groove by bolts. The thrust of the pneumatic push rod 34 is adjustable to avoid excessive clamping and damage to the ferrule. The telescopic end of the pneumatic push rod 34 is fixedly connected to a claw 35, which is made of stainless steel. A clamping seat 36 is fixedly connected to the side of the claw 35 near the fiber optic ceramic ferrule body 33 by bolts. The inner arc surface of the clamping seat 36 is adapted to the outer arc surface of the ferrule, and a soft pad is adhered to the inner arc surface to prevent excessive clamping force from causing damage.

[0022] The camera mechanism 4 is fixedly mounted on the top of the base plate 1, including a first support rod 41, a mounting base 42, a side camera assembly 43, a second support rod 44, a top block 45, and an upper camera assembly 46. The first support rod 41 is an L-shaped stainless steel round rod, three of which are equidistantly mounted around the top of the base plate 1. Its bottom end has a mounting plate, which can be fixed to the top of the base plate 1 with bolts. This multi-mount design ensures full coverage of the shooting angle. The end of the first support rod 41 away from the base plate 1 is welded and fixed to the mounting base 42, which is made of aluminum alloy. The side camera assembly 43 is bolted to one side corresponding to the workpiece clamping mechanism 3. Both the side camera assembly 43 and the upper camera assembly 46 use industrial CCD cameras. Equipped with a telecentric lens, it can clearly capture minute defects. The top of the mounting base 42 is also welded and fixed with a second support rod 44, which is also an L-shaped stainless steel rod. One end of the three second support rods 44 is welded and fixed through a top block 45. The top block 45 is a cylindrical structure. The bottom of the top block 45 is fixed with an upper camera assembly 46 by bolts. The axis is aligned with the center of the ferrule and is used to photograph the end face of the ferrule. The three sets of side camera assemblies 43 work together with the upper camera assembly 46 to achieve full-surface inspection of the ferrule without blind spots. The surface of the second support rod 44 is welded and fixed with a positioning ring plate 47, which is a ring-shaped steel plate used to limit the installation position of the supplementary lighting mechanism 5 and ensure accurate supplementary lighting angle.

[0023] The supplementary lighting mechanism 5 is attached to the camera mechanism 4 and includes a ring frame 51, arc-shaped sleeves 52, and supplementary lights 53. The ring frame 51 is an aluminum alloy ring structure. Three arc-shaped sleeves 52 are welded and installed at equal intervals around the top of the ring frame 51. The arc-shaped sleeves 52 are made of elastic plastic, and their inner arc fits against the outer surface of the second support rod 44. They are respectively attached to the three second support rods 44, making installation and disassembly convenient. The side of the arc-shaped sleeve 52 is in contact with the side of the positioning ring plate 47 to ensure that the position of the supplementary lighting mechanism 5 is fixed and does not shift after installation. Three supplementary lights 53 are installed at equal intervals around the bottom of the ring frame 51. The supplementary lights 53 are white LED light sources that illuminate the outer surface of the fiber optic ceramic ferrule body 33 at an angle of 30°-45°, enhancing the contrast between the defective area and the normal surface, making it easier for the camera to capture small defects.

[0024] Optionally, the device also includes an intelligent detection system, which includes an industrial computer, an image acquisition card, and detection software. The image acquisition card is electrically connected to the side camera assembly 43 and the upper camera assembly 46, respectively, and transmits image data to the industrial computer in real time. The detection software has a built-in defect recognition algorithm that can automatically extract the appearance features of the ferrule, compare them with preset standard parameters, determine whether there are defects, display the detection results in real time, and automatically record defect information.

[0025] In use, the fiber optic ceramic ferrule body 33 is inserted into the centering sleeve 32. The pneumatic push rod 34 is activated, and the jaws 35 drive the clamping seat 36 to move closer to the ferrule until the clamping seat 36 is tightly attached to the ferrule surface, completing stable clamping. The rotary table 2 is activated to drive the ferrule to rotate smoothly. At the same time, the supplementary light 53 and the camera assembly are turned on. The side camera assembly 43 synchronously captures the side image of the ferrule, and the upper camera assembly 46 captures the images of both ends of the ferrule. The image acquisition card transmits real-time image data to the industrial computer. The inspection software preprocesses the acquired images, automatically extracts defect features such as scratches, cracks, missing corners, and stains, compares the feature parameters with preset standards, determines whether the ferrule is qualified, and classifies and records information such as defect type, size, and location. The inspection results are displayed on the screen in real time for the staff to observe and record.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting appearance defects in fiber optic ceramic ferrules, comprising a base plate (1), a rotary table (2), a workpiece clamping mechanism (3), a camera mechanism (4), and a supplementary lighting mechanism (5), characterized in that: The rotary table (2) is fixedly installed at the center of the top of the base plate (1), the workpiece clamping mechanism (3) is fixedly installed on the rotating end of the rotary table (2), the camera mechanism (4) is fixedly installed on the top of the base plate (1), and the supplementary lighting mechanism (5) is snapped onto the camera mechanism (4).

2. The optical fiber ceramic ferrule appearance defect detection device according to claim 1, characterized in that: The workpiece clamping mechanism (3) includes a chuck (31), a centering bushing (32) is fixedly connected to the center position of the top of the chuck (31), an optical fiber ceramic ferrule body (33) is inserted into the centering bushing (32), three grooves are equidistantly arranged around the top of the chuck (31), and a claw (35) is fixedly connected to the side of the inner wall of the groove through a pneumatic push rod (34). A clamping seat (36) is fixedly connected to the side of the claw (35) near the optical fiber ceramic ferrule body (33).

3. The optical fiber ceramic ferrule appearance defect detection device according to claim 2, characterized in that: The camera mechanism (4) includes a first support rod (41), and the number of the first support rod (41) is three and they are equidistantly mounted around the top of the base plate (1). The end of the first support rod (41) away from the base plate (1) is fixedly connected to a mounting base (42), and a side camera assembly (43) is mounted on one side of the mounting base (42) corresponding to the workpiece clamping mechanism (3).

4. The optical fiber ceramic ferrule appearance defect detection device according to claim 3, characterized in that: The top of the mounting base (42) is also fixedly mounted with a second bracket (44), and one end of the three second brackets (44) is fixedly connected by a top block (45). The bottom of the top block (45) is fixedly mounted with an upper camera assembly (46).

5. The optical fiber ceramic ferrule appearance defect detection device according to claim 4, characterized in that: The supplementary lighting mechanism (5) includes a ring frame (51), with three arc-shaped sleeves (52) equidistantly mounted around the top of the ring frame (51), and the three arc-shaped sleeves (52) respectively snapped onto three second frame rods (44). Three supplementary lights (53) are equidistantly mounted around the bottom of the ring frame (51).

6. The optical fiber ceramic ferrule appearance defect detection device according to claim 5, characterized in that: Both the side camera assembly (43) and the upper camera assembly (46) are industrial CCD cameras, and the fill light (53) illuminates the outer surface of the fiber ceramic ferrule body (33) at a certain angle.

7. The optical fiber ceramic ferrule appearance defect detection device according to claim 6, characterized in that: The second support rod (44) is fixedly connected to a positioning ring plate (47), and the side of the positioning ring plate (47) is in contact with the side of the arc-shaped sleeve (52).

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