An automatic grinding and polishing device for optical fiber end face in grating optical fiber sensing composite cable
By designing an automated grinding and polishing device, using image acquisition and curvature analysis module combined with laser grinding and polishing, the problem of low processing accuracy and efficiency of fiber end surfaces is solved, and high-efficiency grinding and polishing processing of fiber end surfaces is achieved to meet optical performance requirements.
Patent Information
- Application Number
- CN202210928798.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-08-03
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2042-08-03
AI Technical Summary
In the prior art, the mechanical cutting effect of optical fiber end surface processing depends on tool accuracy and operator proficiency, which makes it difficult to guarantee the quality and consistency of optical fiber end surfaces. The polishing process of mechanical grinding is complex and the equipment is large, which cannot meet the optical performance requirements.
An automatic grinding and polishing device for the end surface of the optical fiber in the grating fiber sensing composite cable is designed, using components such as grinding and polishing rack, fixing rack, material discharge mechanism, laser, imaging device and curvature analysis module, through image acquisition, curvature analysis and laser grinding Polishing, realizes automatic precision grinding and polishing of the end surface of the optical fiber.
It improves the grinding and polishing accuracy and efficiency of the fiber end surface, reduces cumbersome processes, ensures that the fiber end surface meets the optical performance requirements, and is more efficient and automated than mechanical grinding.
Smart Images
Figure CN115122196B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of optical fiber processing, in particular to an automatic grinding and polishing device for an optical fiber end face in a grating optical fiber sensing composite cable. Background Art
[0002] At present, when processing the optical fiber in the grating fiber optic sensor composite cable, the optical fiber is only mechanically cut without any polishing treatment on the optical fiber end face. At the same time, there is no real-time detection tool during the processing process. Since the effect of mechanical cutting depends on the accuracy of the mechanical cutting knife and the proficiency of the operator, the above two factors are not guaranteed in the actual production process, resulting in the quality and consistency of the optical fiber end face cannot be effectively guaranteed. Even if a good optical fiber end face is obtained by mechanical cutting, the mechanically cut end face is a plane and cannot meet the curvature radius requirement of the optical fiber end face, resulting in poor effect of the optical fiber active connection. At the same time, because there is no real-time detection means, the quality of the optical fiber in the grating fiber optic sensor composite cable cannot be guaranteed. Although the existing technology can temporarily eliminate some problems by adding optical fiber refractive index matching liquid, the optical fiber refractive index matching also has disadvantages such as easy loss and easy contamination. The optical fiber refractive index matching also reduces the reliability of the optical fiber active connection, thereby causing unstable optical performance of the optical fiber connection.
[0003] In the prior art, the optical fiber end face is polished by using a mechanical grinding polishing method to obtain an optical fiber end face with a certain curvature radius, thereby ensuring excellent optical performance. However, the mechanical grinding polishing method has a complex grinding process, a large equipment volume, and cumbersome processing procedures.
[0004] Based on this, in order to solve the above technical defects, an automatic grinding and polishing device for the optical fiber end face in a grating optical fiber sensing composite cable is proposed. Summary of the Invention
[0005] (1) Technical problems solved
[0006] In response to the shortcomings of the existing technology, the present invention provides an automatic grinding and polishing device for the optical fiber end face in a grating optical fiber sensor composite cable, which solves the problems of complex process, large equipment size and cumbersome processing procedures in the mechanical grinding and polishing of the optical fiber end face proposed in the above background technology.
[0007] (2) Technical solution
[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automated polishing device for the end face of an optical fiber in a grating optical fiber sensor composite cable, comprising a polishing frame and a fixed frame, wherein a fixed frame is provided on the left side of the polishing frame, a material discharge mechanism is provided inside the fixed frame, a mounting plate is provided on the right side of the polishing frame, and a laser is provided on one side of the mounting plate, slides are provided on the front and rear sides of the inner wall of the polishing frame, and a mounting frame is slidably provided between the two slides, a camera device is provided on one side of the mounting frame, and a cleaning mechanism is provided below the camera device;
[0009] The unloading mechanism includes an unloading frame, a first movable frame and a second movable frame, the first movable frame is slidably provided inside the fixed frame, and the second movable frame is slidably provided inside the first movable frame, the unloading frame is provided inside the second movable frame, and a displacement component is provided on the left side of the unloading frame, and a positioning component is provided on the right side of the unloading frame, two first servo electric cylinders are symmetrically provided inside the fixed frame, and one end of the driving shaft of the two first servo electric cylinders is fixedly connected to the top of the first movable frame, two second servo electric cylinders are symmetrically provided inside the first movable frame, and one end of the driving shaft of the two second servo electric cylinders is fixedly connected to both sides of the unloading frame respectively;
[0010] A processor is provided on one side of the polishing frame, and the processor is communicatively connected to an image acquisition module, a curvature analysis module, and a controller. The image acquisition module is used to collect and analyze image data information of the optical fiber end face, and the curvature analysis module is used to analyze the curvature radius data of the optical fiber end face. The controller is used to control the unloading mechanism and the cleaning mechanism to transport, position and clean the optical fiber port in the cable, and at the same time control the laser operating wavelength, pulse width, repetition frequency and power parameters of the laser, and use the laser to perform polishing on the optical fiber port.
[0011] Preferably, the cleaning mechanism includes a cleaning rack, a through opening is opened on one side of the cleaning rack, and sealing gaskets are provided on both sides of the through opening, two third electric push rods are symmetrically provided on one side of the cleaning rack, and one end of the driving shaft of the two third electric push rods is fixedly connected to one side of the two sealing gaskets respectively, a spray rack is provided above the inside of the cleaning rack, and two drying racks are symmetrically provided on the front and back sides of the inside of the cleaning rack.
[0012] Preferably, the displacement assembly includes a linear motor, a movable plate and a movable splint, the top and bottom of the material discharging rack are both slidably provided with linear motors, and one side of the two linear motors is provided with a movable plate, the interior of the two movable plates are symmetrically provided with first electric push rods, and the interior of the material discharging rack is provided with a slide groove that cooperates with the drive shaft of the first electric push rod, the interior of the material discharging rack is symmetrically provided with two movable splints, and one side of the two movable splints is respectively fixedly connected to one end of the drive shaft of the two first electric push rods.
[0013] Preferably, the positioning assembly includes a positioning clamping plate, two positioning clamping plates are symmetrically arranged on the right side inside the material rack, and a second electric push rod is arranged on one side of the two positioning clamping plates.
[0014] Preferably, a vacuum cleaner is provided on the top of the right side of the material discharging rack, and a dust collection rack is provided on the right side of the inside of the material discharging rack. The interior of the vacuum cleaner is connected to the interior of the dust collection rack, and a dust collection port is provided on the inner wall of the dust collection rack.
[0015] Preferably, the process of performing radius curvature analysis on the optical fiber end face by the curvature analysis module includes the following steps:
[0016] Step S1: After cleaning and drying the optical fiber end face, the optical fiber end face is captured by a camera and transmitted to the image processing module. Similarly, the image processing module first performs foreground segmentation on the image captured by the camera device, extracts the image of the optical fiber end face, and then performs black and white binarization processing to obtain the curvature radius data and mark it as WR;
[0017] Step S2: The WR value is transmitted to the curvature analysis module. A curvature radius threshold WRj is pre-set in the curvature analysis module. It should be noted that the curvature radius threshold is a preset value used to measure the optical performance of the optical fiber end face. The curvature radius threshold is much smaller than the curvature radius measured on the optical fiber end face. Therefore, the curvature radius threshold is only used to judge and analyze the curvature radius measured on the optical fiber end face. The difference between WR and WRj is marked as the polishing allowance. The polishing range of the polishing allowance on the optical fiber end face is obtained and marked as the end face polishing amount SC.
[0018] Step S3: The ratio of the curvature radius threshold WRj to the end face polishing amount SC is marked as the polishing coefficient QW. It should be noted that the polishing coefficient is a value indicating the polishing allowance of the optical fiber end face. The larger the polishing coefficient, the larger the polishing allowance and the greater the roughness of the optical fiber end face. The polishing coefficient threshold QWmax is pre-stored in the curvature analysis module, and the polishing coefficient QW is compared with the polishing coefficient threshold QWmax:
[0019] If QW<QWmax, it is determined that the roughness of the fiber end face meets the process standard, and the curvature analysis module sends a normal processing signal to the processor;
[0020] If QW≤QWmax, it is determined that the roughness of the optical fiber end face exceeds the process standard. The curvature analysis module sends a grinding and polishing processing signal to the processor. After receiving the grinding and polishing processing signal, the processor sends the grinding and polishing processing signal to the controller. After receiving the grinding and polishing processing signal, the controller controls the laser to turn on and use the laser light emitted by the laser to continue grinding and polishing the optical fiber end face.
[0021] Step S4: After the processor receives the grinding and polishing signal, the optical fiber end face continues to be ground and polished by the laser, and then the above steps are repeated until the processor receives the normal processing signal; after the processor receives the normal processing signal, the two first electric push rod drive shafts push the movable clamp to clamp the surface of the cable, and then the linear motor slides toward the outside of the grinding and polishing frame on the material discharge frame, so that one end of the cable exits from the inside of the positioning component, and through multiple reciprocating motions of the displacement component, until one end of the cable exits from the inside of the material discharge frame, the automated grinding and polishing of the optical fiber end face inside the cable is completed.
[0022] (3) Beneficial effects
[0023] The present invention provides an automated polishing device for the end faces of optical fibers in grating optical fiber sensing composite cables. Compared with the prior art, it has the following advantages:
[0024] By arranging a displacement component and a positioning component inside the fixed frame, and cooperating with a laser and a camera device on one side of the grinding and polishing frame, when grinding and polishing the optical fiber end face, the displacement component is used to move one end of the cable from the left side of the material unwinding frame to the right side of the positioning component, and the positioning component is used to fix one end of the cable, thereby ensuring the stability of the optical fiber port in the cable during the grinding and polishing process, thereby improving the grinding and polishing accuracy of the optical fiber end face. In addition, during the grinding and polishing process of the optical fiber port in the optical cable, the displacement component and the positioning component are used in conjunction to realize automatic adjustment of the cable, further improving the grinding and polishing efficiency of the optical fiber end face;
[0025] Through the curvature analysis module set up, the image of the optical fiber end face can be analyzed to obtain the polishing coefficient of the optical fiber end face. The polishing coefficient is a numerical value indicating the size of the polishing allowance of the optical fiber end face. The larger the polishing coefficient, the larger the polishing allowance and the roughness of the optical fiber end face. After real-time comparison of the polishing coefficient and the polishing coefficient threshold, a signal output is generated. According to the output signal type, the controller controls different components to work until the roughness of the optical fiber end face meets the process requirements after the optical fiber end face is polished. Compared with the mechanical polishing processing method, the polishing processing scheme of the present device can not only realize the efficient and high-precision polishing processing of the optical fiber end face, but also realize the automated processing of the optical fiber end face, reduce the process of polishing the optical fiber end face, and improve the polishing efficiency of the optical fiber end face. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 This is a schematic diagram of the structure of an automatic polishing device for the end face of an optical fiber in a grating optical fiber sensing composite cable according to the present invention;
[0027] Figure 2 It is a side view of the unloading rack and the fixing rack structure of the present invention;
[0028] Figure 3 It is a side view of the unloading rack and movable splint structure of the present invention;
[0029] Figure 4 It is a side view of the material unwinding rack structure of the present invention;
[0030] Figure 5 A side view of the interior of the cleaning rack structure of the present invention;
[0031] Figure 6 This is a principle block diagram of the curvature analysis module of the present invention.
[0032] In the figure, 10, grinding and polishing rack; 20, fixed rack; 30, mounting plate; 40, laser; 50, slide; 60, mounting rack; 70, camera device; 101, unloading rack; 102, first movable rack; 103, second movable rack; 104, first servo cylinder; 105, second servo cylinder; 201, linear motor; 202, movable plate; 203, movable splint; 204, first electric push rod; 205, slide; 301, positioning splint; 302, second electric push rod; 303, vacuum cleaner; 304, dust collection rack; 305, dust collection port; 401, cleaning rack; 402, through port; 403, sealing gasket; 404, third electric push rod; 405, spray rack; 406, drying rack. DETAILED DESCRIPTION
[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0034] See also Figure 1-6As shown, the present invention provides a technical solution: an automatic grinding and polishing device for the end face of an optical fiber in a grating optical fiber sensing composite cable, comprising a grinding and polishing frame 10 and a fixing frame 20, wherein the fixing frame 20 is provided on the left side of the grinding and polishing frame 10, and a feeding mechanism is provided inside the fixing frame 20, a mounting plate 30 is provided on the right side of the grinding and polishing frame 10, and a laser 40 is provided on one side of the mounting plate 30, wherein the laser 40 adopts a picosecond pulse laser, slides 50 are provided on the front and back sides of the inner wall of the grinding and polishing frame 10, and a mounting frame 60 is slidingly provided between the two slides 50, a camera device 70 is provided on one side of the mounting frame 60, wherein the camera device 70 adopts a CCD camera, and a cleaning mechanism is provided below the camera device 70, by cutting one end of the optical fiber inside the cable, then inserting one end of the cable into the feeding mechanism, one end of the cable passes through the feeding mechanism and is inserted into the cleaning mechanism, the cleaning mechanism is used to clean the cut end face of the optical fiber in the cable, and then the optical fiber end face is blown dry, and the cable is placed in the feeding mechanism After positioning, the image of the optical fiber end face is transmitted to the image processing module through the camera device 70 for black and white binary processing, and the cleanliness and curvature radius of the optical fiber end face and other data are calculated based on the processed data. That is, the camera device 70 captures the optical fiber end face and transmits it to the image processing module. Similarly, the image processing module first performs foreground segmentation on the image captured by the camera device 70, extracts the image of the optical fiber end face, and then performs black and white binary processing. According to the distribution of the black and white binary values of the end face and the calculation of the inner diameter R of the bright ring formed, the cleanliness of the optical fiber end face and the approximate range of the curvature radius of the optical fiber end face are judged, and the corresponding instructions are output. Then, the laser 40 is controlled to perform grinding and polishing on the optical fiber end face according to the output instructions. After completing one grinding and polishing process, the optical fiber end face is cleaned, and the camera device 70 is used to capture the image of the optical fiber end face to obtain further cleanliness and curvature radius data. The cleanliness and curvature radius data are compared with the parameters required by the process until the processed data meets the parameter range requirements of the process.
[0035] The unloading mechanism includes an unloading frame 101, a first movable frame 102 and a second movable frame 103. The first movable frame 102 is slidingly provided inside the fixed frame 20, and the second movable frame 103 is slidingly provided inside the first movable frame 102. The unloading frame 101 is provided inside the second movable frame 103, and a displacement component is provided on the left side of the unloading frame 101, and a positioning component is provided on the right side of the unloading frame 101. Two first servo electric cylinders 104 are symmetrically provided inside the fixed frame 20, and one end of the driving shaft of the two first servo electric cylinders 104 is fixedly connected to the top of the first movable frame 102, and two second servo electric cylinders 104 are symmetrically provided inside the first movable frame 102. Servo electric cylinder 105, and one end of the driving shaft of the two second servo electric cylinders 105 is fixedly connected to the two sides of the material rack 101 respectively. By inserting one end of the cable into the material rack 101, the displacement component is used to send one end of the cable from the left side of the material rack 101 to the right side of the positioning component, and the positioning component is used to fix one end of the cable to ensure the stability of the optical fiber port in the cable during the grinding and polishing process, thereby improving the grinding and polishing accuracy of the optical fiber end face. In addition, in the process of grinding and polishing the optical fiber port in the optical cable, the displacement component and the positioning component are used in conjunction to realize automatic adjustment of the cable, further improving the grinding and polishing efficiency of the optical fiber end face.
[0036] The displacement assembly includes a linear motor 201, a movable plate 202 and a movable splint 203. The top and bottom of the material discharging rack 101 are both slidably provided with a linear motor 201, and one side of each of the two linear motors 201 is provided with a movable plate 202. The interiors of the two movable plates 202 are symmetrically provided with a first electric push rod 204, and the interior of the material discharging rack 101 is provided with a slide groove 205 that matches the drive shaft of the first electric push rod 204. The interior of the material discharging rack 101 is symmetrically provided with two movable splints 203, and one side of the two movable splints 203 is divided into It is fixedly connected to one end of the driving shaft of the two first electric push rods 204. When one end of the cable is conveyed to one side of the positioning component, the movable clamping plate 203 is pushed by the driving shaft of the two first electric push rods 204 to clamp the surface of the cable. Then the linear motor 201 slides on the unloading rack 101 toward one side of the fixed rack 20, so that one end of the cable moves toward the inside of the positioning component. Through multiple reciprocating motions of the displacement component, until one end of the cable enters the interior of the positioning component, the automatic conveying of the cable is realized, which is convenient for grinding and polishing the port of the optical fiber.
[0037] The positioning assembly includes a positioning clamp 301. Two positioning clamps 301 are symmetrically arranged on the right side of the inside of the material rack 101, and a second electric push rod 302 is arranged on one side of the two positioning clamps 301. After one end of the cable is sent between the two positioning clamps 301 through the displacement assembly, the two second electric push rods 302 drive shafts push the two positioning clamps 301 to clamp and position one end of the cable, so that the optical fiber end face maintains stability during the grinding and polishing process, thereby improving the grinding and polishing accuracy of the optical fiber end face.
[0038] A vacuum cleaner 303 is provided at the top of the right side of the material discharging rack 101, and a dust collection rack 304 is provided on the right side of the material discharging rack 101. The interior of the vacuum cleaner 303 is connected to the interior of the dust collection rack 304, and a dust collection port 305 is provided on the inner wall of the dust collection rack 304. By using the vacuum cleaner 303 and the dust collection rack 304 in conjunction with each other, the waste debris generated during the grinding and polishing process of the optical fiber end face can be cleaned up centrally.
[0039] The cleaning mechanism includes a cleaning rack 401, which has a through opening 402 on one side of the cleaning rack 401, and sealing gaskets 403 are provided on both sides of the through opening 402. Two third electric push rods 404 are symmetrically provided on one side of the cleaning rack 401, and one end of the driving shaft of the two third electric push rods 404 is fixedly connected to one side of the two sealing gaskets 403 respectively. A spray rack 405 is provided above the interior of the cleaning rack 401, and two drying racks 406 are symmetrically provided on the front and back sides of the interior of the cleaning rack 401. When cleaning the optical fiber port, one end of the optical fiber is inserted into the interior of the cleaning rack 401 through the through opening 402, and the optical fiber port is cleaned by using the ethanol solution sprayed from the spray rack 405, and then the optical fiber port is dried by the drying racks 406 on both sides to ensure the cleanliness of the optical fiber port.
[0040] As a further solution of the present invention: a processor is provided on one side of the polishing frame 10, and the processor is communicatively connected to an image acquisition module, a curvature analysis module, and a controller. The image acquisition module is used to collect and analyze image data information of the optical fiber end face, and the curvature analysis module is used to analyze the curvature radius data of the optical fiber end face. The controller is used to control the discharge mechanism and the cleaning mechanism to transport, position and clean the optical fiber port in the cable, and at the same time control the laser operating wavelength, pulse width, repetition frequency and power parameters of the laser 40, and use the laser to perform polishing processing on the optical fiber port.
[0041] The curvature analysis module performs radius curvature analysis on the optical fiber end face, which includes the following steps:
[0042] Step S1: After cleaning and drying the optical fiber end face, the optical fiber end face is captured by the camera device 70 and transmitted to the image processing module. The image processing module also performs foreground segmentation on the image captured by the camera device 70, extracts the image of the optical fiber end face, and then performs black and white binarization processing to obtain curvature radius data and mark it as WR;
[0043] Step S2: The WR value is transmitted to the curvature analysis module. A curvature radius threshold WRj is pre-set in the curvature analysis module. It should be noted that the curvature radius threshold is a preset value used to measure the optical performance of the optical fiber end face. The curvature radius threshold is much smaller than the curvature radius measured on the optical fiber end face. Therefore, the curvature radius threshold is only used to judge and analyze the curvature radius measured on the optical fiber end face. The difference between WR and WRj is marked as the polishing allowance. The polishing range of the polishing allowance on the optical fiber end face is obtained and marked as the end face polishing amount SC.
[0044] Step S3: The ratio of the curvature radius threshold WRj to the end face polishing amount SC is marked as the polishing coefficient QW. It should be noted that the polishing coefficient is a value indicating the polishing allowance of the optical fiber end face. The larger the polishing coefficient, the larger the polishing allowance and the greater the roughness of the optical fiber end face. The polishing coefficient threshold QWmax is pre-stored in the curvature analysis module, and the polishing coefficient QW is compared with the polishing coefficient threshold QWmax:
[0045] If QW<QWmax, it is determined that the roughness of the fiber end face meets the process standard, and the curvature analysis module sends a normal processing signal to the processor;
[0046] If QW≤QWmax, it is determined that the roughness of the optical fiber end face exceeds the process standard, and the curvature analysis module sends a grinding and polishing processing signal to the processor. After receiving the grinding and polishing processing signal, the processor sends the grinding and polishing processing signal to the controller. After receiving the grinding and polishing processing signal, the controller controls the laser 40 to turn on and continue to grind and polish the optical fiber end face using the laser light emitted by the laser 40.
[0047] Step S4: After the processor receives the grinding and polishing signal, the laser 40 continues to grind and polish the optical fiber end face, and then repeats the above steps until the processor receives the normal processing signal; after the processor receives the normal processing signal, the two first electric push rods 204 drive the shaft to push the movable clamp 203 to clamp the surface of the cable, and then the linear motor 201 slides on the material rack 101 toward the outside of the grinding and polishing frame 10, so that one end of the cable exits from the inside of the positioning component, through multiple reciprocating motions of the displacement component, until one end of the cable exits from the inside of the material rack 101, the automated grinding and polishing of the optical fiber end face inside the cable is completed.
[0048] Working principle:
[0049] One end of the cable is inserted into the unwinding rack 101, and the two first electric push rods 204 drive shafts push the movable clamping plate 203 to clamp the surface of the cable. Then, the linear motor 201 slides on the unwinding rack 101 toward one side of the fixed frame 20, so that one end of the cable moves toward the interior of the positioning assembly. Through multiple reciprocating movements of the displacement assembly, one end of the cable enters the interior of the positioning assembly. After one end of the cable is fed between the two positioning clamping plates 301, the two second electric push rods 302 drive shafts push the two positioning clamping plates 301 to clamp and position one end of the cable.
[0050] One end of the optical fiber is inserted into the cleaning rack 401 through the opening 402. The optical fiber end is cleaned with an ethanol solution sprayed from the spray rack 405. The optical fiber end is then dried by the drying racks 406 on both sides. The optical fiber end face is then captured by the camera device 70 and transmitted to the image processing module. The image processing module also performs foreground segmentation on the image captured by the camera device 70, extracts the image of the optical fiber end face, and then performs black and white binarization processing to obtain curvature radius data and mark it as WR.
[0051] The value of WR is transmitted to the curvature analysis module, and a curvature radius threshold WRj is pre-set in the curvature analysis module. It should be noted that the curvature radius threshold is a preset value for measuring the optical performance of the optical fiber end face. The value of the curvature radius threshold is much smaller than the value of the measured curvature radius of the optical fiber end face. Therefore, the curvature radius threshold is only used to judge and analyze the measured curvature radius of the optical fiber end face. The difference between WR and WRj is marked as the polishing allowance, and the polishing range of the polishing allowance on the optical fiber end face is obtained and marked as the end face polishing amount SC. The ratio of the curvature radius threshold WRj to the end face polishing amount SC is marked as the polishing coefficient QW. It should be noted that the polishing coefficient is a value indicating the size of the polishing allowance of the optical fiber end face. The larger the polishing coefficient, the larger the polishing allowance and the greater the roughness of the optical fiber end face. The polishing coefficient threshold QWmax is pre-stored in the curvature analysis module, and the polishing coefficient QW is compared with the polishing coefficient threshold QWmax:
[0052] If QW<QWmax, it is determined that the roughness of the fiber end face meets the process standard, and the curvature analysis module sends a normal processing signal to the processor;
[0053] If QW≤QWmax, it is determined that the roughness of the optical fiber end face exceeds the process standard, and the curvature analysis module sends a grinding and polishing processing signal to the processor. After receiving the grinding and polishing processing signal, the processor sends the grinding and polishing processing signal to the controller. After receiving the grinding and polishing processing signal, the controller controls the laser 40 to turn on and continue to grind and polish the optical fiber end face using the laser light emitted by the laser 40.
[0054] After the processor receives the grinding and polishing signal, the laser 40 continues to grind and polish the optical fiber end face, and then repeats the above steps until the processor receives the normal processing signal; after the processor receives the normal processing signal, the two first electric push rods 204 drive shafts push the movable clamp 203 to clamp the surface of the cable, and then the linear motor 201 slides on the material rack 101 toward the outside of the grinding and polishing frame 10, so that one end of the cable exits from the inside of the positioning component, through multiple reciprocating motions of the displacement component, until one end of the cable exits from the inside of the material rack 101, the automated grinding and polishing of the optical fiber end face inside the cable is completed.
[0055] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.
[0056] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.
[0057] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.
Claims
1. An automatic polishing device for the end face of an optical fiber in a grating optical fiber sensing composite cable, comprising a polishing frame (10) and a fixing frame (20), wherein the fixing frame (20) is arranged on the left side inside the polishing frame (10), and characterized in that: A material discharge mechanism is arranged inside the fixing frame (20), a mounting plate (30) is arranged on the right side of the grinding and polishing frame (10), and a laser (40) is arranged on one side of the mounting plate (30), slide plates (50) are arranged on the front and rear sides of the inner wall of the grinding and polishing frame (10), and a mounting frame (60) is slidably arranged between the two slide plates (50), a camera device (70) is arranged on one side of the mounting frame (60), and a cleaning mechanism is arranged below the camera device (70); The material discharge mechanism comprises a material discharge rack (101), a first movable rack (102) and a second movable rack (103); the first movable rack (102) is slidably arranged inside the fixed rack (20), and the second movable rack (103) is slidably arranged inside the first movable rack (102); the material discharge rack (101) is arranged inside the second movable rack (103), and a displacement component is arranged on the left side inside the material discharge rack (101); a positioning component is arranged on the right side inside the material discharge rack (101); two first servo electric cylinders (104) are symmetrically arranged inside the fixed rack (20), and one end of the driving shaft of the two first servo electric cylinders (104) is fixedly connected to the top of the first movable rack (102); two second servo electric cylinders (105) are symmetrically arranged inside the first movable rack (102), and one end of the driving shaft of the two second servo electric cylinders (105) is fixedly connected to two sides of the material discharge rack (101) respectively; A processor is provided on one side of the polishing frame (10), and the processor is communicatively connected to an image acquisition module, a curvature analysis module, and a controller, wherein the image acquisition module is used to acquire and analyze image data information of the optical fiber end face, the curvature analysis module is used to analyze curvature radius data of the optical fiber end face, and the controller is used to control a material discharge mechanism and a cleaning mechanism to transport, position, and clean the optical fiber port in the cable, and simultaneously control the laser operating wavelength, pulse width, repetition frequency, and power parameters of the laser (40), and use the laser to perform polishing on the optical fiber port; The process of the curvature analysis module performing radius curvature analysis on the optical fiber end face comprises the following steps: Step S1: After cleaning and drying the optical fiber end face, the optical fiber end face is captured by a camera device (70) and transmitted to an image processing module. Similarly, the image processing module first performs foreground segmentation on the image captured by the camera device (70), extracts the image of the optical fiber end face, and then performs black and white binary processing to obtain curvature radius data and mark it as WR; Step S2: The value of WR is transmitted to the curvature analysis module, and a curvature radius threshold WRj is pre-set in the curvature analysis module. It should be noted that the curvature radius threshold is a preset value for measuring the optical performance of the optical fiber end face. The value of the curvature radius threshold is much smaller than the value of the curvature radius measured on the optical fiber end face. Therefore, the curvature radius threshold is only used to judge and analyze the curvature radius measured on the optical fiber end face. The difference between WR and WRj is marked as the polishing allowance, and the polishing range of the polishing allowance on the optical fiber end face is obtained and marked as the end face polishing amount SC. Step S3: The ratio of the end face polishing amount SC to the curvature radius threshold WRj is marked as the polishing coefficient QW. It should be noted that the polishing coefficient is a value indicating the polishing allowance of the optical fiber end face. The larger the polishing coefficient, the larger the polishing allowance of the optical fiber end face and the greater the roughness. The polishing coefficient threshold QWmax is pre-stored in the curvature analysis module, and the polishing coefficient QW is compared with the polishing coefficient threshold QWmax: If QW<QWmax, it is determined that the roughness of the fiber end face meets the process standard, and the curvature analysis module sends a normal processing signal to the processor; If QW≥QWmax, it is determined that the roughness of the optical fiber end face exceeds the process standard, and the curvature analysis module sends a grinding and polishing processing signal to the processor. After receiving the grinding and polishing processing signal, the processor sends the grinding and polishing processing signal to the controller. After receiving the grinding and polishing processing signal, the controller controls the laser (40) to turn on, and uses the laser emitted by the laser (40) to continue grinding and polishing the optical fiber end face; Step S4: After the processor receives the grinding and polishing signal, the laser (40) continues to grind and polish the end face of the optical fiber, and then repeats the above steps until the processor receives the normal processing signal; after the processor receives the normal processing signal, the two first electric push rods (204) drive the shaft to push the movable clamping plate (203) to clamp the surface of the cable, and then the linear motor (201) slides on the unwinding rack (101) toward the outside of the grinding and polishing rack (10), so that one end of the cable is withdrawn from the inside of the positioning component, and through multiple reciprocating movements of the displacement component, until one end of the cable is withdrawn from the inside of the unwinding rack (101), the automated grinding and polishing of the end face of the optical fiber inside the cable is completed; The cleaning mechanism comprises a cleaning frame (401), a through opening (402) is provided on one side of the cleaning frame (401), and sealing pads (403) are provided on both sides of the through opening (402), two third electric push rods (404) are symmetrically provided on one side of the cleaning frame (401), and one end of the driving shaft of the two third electric push rods (404) is respectively fixedly connected to one side of the two sealing pads (403), a spraying frame (405) is provided above the inside of the cleaning frame (401), and two drying frames (406) are symmetrically provided on the front and rear sides of the inside of the cleaning frame (401); The displacement assembly comprises a linear motor (201), a movable plate (202) and a movable clamping plate (203); the top and bottom of the material discharging rack (101) are both slidably provided with linear motors (201), and one side of the two linear motors (201) is provided with movable plates (202); first electric push rods (204) are symmetrically provided inside the two movable plates (202); a sliding groove (205) matched with a driving shaft of the first electric push rod (204) is provided inside the material discharging rack (101); two movable clamping plates (203) are symmetrically slidably provided inside the material discharging rack (101), and one side of the two movable clamping plates (203) is respectively fixedly connected to one end of the driving shaft of the two first electric push rods (204); The positioning assembly comprises a positioning clamping plate (301), two positioning clamping plates (301) are symmetrically arranged on the right side inside the material placing rack (101), and a second electric push rod (302) is arranged on one side of the two positioning clamping plates (301); A vacuum cleaner (303) is arranged on the top of the right side of the material discharging rack (101), and a dust collecting rack (304) is arranged on the right side inside the material discharging rack (101); the interior of the vacuum cleaner (303) is connected with the interior of the dust collecting rack (304), and a dust collecting port (305) is provided on the inner wall of the dust collecting rack (304).