CN113189716A - Integrated end face intelligent self-checking system based on MPO optical fiber connector - Google Patents
Integrated end face intelligent self-checking system based on MPO optical fiber connector Download PDFInfo
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- CN113189716A CN113189716A CN202110497335.9A CN202110497335A CN113189716A CN 113189716 A CN113189716 A CN 113189716A CN 202110497335 A CN202110497335 A CN 202110497335A CN 113189716 A CN113189716 A CN 113189716A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/385—Accessories for testing or observation of connectors
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Abstract
The invention relates to the technical field of optical fiber communication, and aims to provide an integrated end face intelligent self-checking system based on an MPO optical fiber connector, which comprises an intelligent detection all-in-one machine, wherein the intelligent detection all-in-one machine comprises an adapter, a focusing wheel, a lens adjusting base, an image processing unit, a brightness adjusting module and a display, the adapter is used for fixing the end face of an optical fiber, the bottom of the adapter is provided with a magnifier, the image processing unit comprises an acquisition unit, an image amplification unit and a frame number processing unit, the frame number processing unit is connected with the acquisition unit through the image amplification unit, the acquisition unit is arranged below the magnifier and is used for receiving the amplified image of the end face of the optical fiber, the image amplification unit is used for amplifying the received image, and the frame number processing unit is used for processing the frame number of the amplified image, the frame number processing unit is connected with a display, and the display is used for displaying the amplified optical fiber end face.
Description
Technical Field
The invention relates to the technical field of optical fiber communication, in particular to an integrated end face intelligent self-checking system based on an MPO optical fiber connector.
Background
At present, with the rapid development of optical fiber communication technology, people have higher and higher comprehensive access requirements on languages, videos, data and the like, and optical networks are planned in China, and the optical fiber networks are planned to be popularized nationwide. To some extent, the structure of the fiber optic connector affects the consistency, reliability, and various properties of the optical transmission system.
The MPO connector is one of important connectors indispensable for popularizing the optical network, is a novel high-density optical fiber connector for pre-connecting optical cables in a data center, and meets the characteristics of small volume, high density, flexible connection and low comprehensive access cost required in the construction of an optical fiber network.
Two main types of processing problems can be found by fiber end face detection techniques: geometric problems and cleaning problems. The geometrical problems are usually caused during the lapping process, and the influence of the optical fiber does not change during operation. The problem can be detected by a microscope of the 3D interferometer and special software for executing an end face detection program, and the hardware and software for realizing the interference detection process are relatively perfect at present and conform to a series of standards widely accepted in the industry.
In the last 10 years, some semi-automatic or so-called "software-assisted" testing approaches have become mature and commercially available. The microscope used for semi-automatic testing is the same as manual testing, except that the fiber end face is analyzed with the aid of computer image processing software. Digital cameras mostly deploy USB or FireWire interfaces, saving the cost of a frame grabber compared to analog camera-based devices.
Similar to manual detection, semi-automatic methods also require the operator to insert the connector into a fixed test platform, position the fiber to be tested (using a multi-fiber connector such as MPO) and adjust the microscope focus. Once a satisfactory image is obtained, the operator initiates the software to capture the image and perform analysis. However, the semi-automatic method has many disadvantages, and cannot fix the optical fiber end face and the connector quickly, so as to provide high-stability detection for the subsequent process.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides an integrated end face intelligent self-checking system based on an MPO optical fiber connector, can quickly fix the MPO optical fiber connector and fix the end face of the connector, and can automatically screen and mark the defective optical fiber end face by pre-storing a standard threshold value in the system.
The method is realized by the following technical scheme: based on the intelligent self-checking system of the integrated end face of the MPO optical fiber connector, the intelligent self-checking system comprises an intelligent detection all-in-one machine, the intelligent detection all-in-one machine comprises an adapter, a focusing wheel, a lens adjusting base, an image processing unit, a brightness adjusting module and a display, the adapter is used for fixing the optical fiber end face, a magnifying glass is arranged at the bottom of the adapter, the image processing unit comprises a collecting unit, an image amplifying unit and a frame number processing unit, the frame number processing unit is connected with the collecting unit through the image amplifying unit, the collecting unit is arranged below the magnifying glass and used for receiving the image of the amplified optical fiber end face, the image amplifying unit is used for amplifying the received image, the frame number processing unit is used for processing the frame number of the amplified image, the frame number processing unit is connected with the display, and the display is used for displaying the amplified optical fiber end face,
the lens adjusting device comprises a lens adjusting base and is characterized in that a focusing wheel and an adapter are arranged on the lens adjusting base, a lens is arranged on the focusing wheel, the focusing wheel is used for adjusting the distance between the focusing wheel and a magnifying lens, the adapter is a clamp with a hollow center, an interface piece matched with the end face of an optical fiber is selected, the interface piece is placed at the hollow center of the adapter, and the interface piece is in sliding butt joint with the clamp.
Preferably, the display is pre-stored with a standard image threshold, and when the image processed by the frame number processing unit is not matched with the standard image threshold, the unmatched area is locked for marking and highlighting, and the marked image is backed up.
Preferably, the brightness adjusting module is arranged on the adapter and polishes the hollow part in the center of the adapter.
Preferably, the magnifier is a 100-fold fiber magnifier.
Preferably, the acquisition unit is a CDD image acquisition camera.
Preferably, the image amplification unit is a pre-stored image amplification algorithm.
Preferably, the frame number processing unit is an average filtering algorithm.
The invention has the beneficial effects that:
(1) the end face of the optical fiber connector can be fixed, and meanwhile, the end face is not scratched;
drawings
FIG. 1 is a schematic diagram of the operation of the present invention;
FIG. 2 is a schematic diagram of the integrated machine of the present invention;
fig. 3 is a block diagram of an adapter of the present invention.
Description of reference numerals: 1. an all-in-one machine; 2. an adapter; 3. a focusing wheel; 4. a display.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to fig. 1 to 3 of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other implementations made by those of ordinary skill in the art based on the embodiments of the present invention are obtained without inventive efforts.
In the description of the present invention, it is to be understood that the terms "counterclockwise", "clockwise", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used for convenience of description only, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting.
Example 1:
referring to fig. 1, an integrated end face intelligent self-checking system based on an MPO optical fiber connector comprises an intelligent detection all-in-one machine, wherein the intelligent detection all-in-one machine comprises an adapter, a focusing wheel, a lens adjusting base, an image processing unit, a brightness adjusting module and a display, referring to fig. 2, the adapter is used for fixing an optical fiber end face, a magnifier is arranged at the bottom of the adapter, the image processing unit comprises a collecting unit, an image amplifying unit and a frame number processing unit, the frame number processing unit is connected with the collecting unit through the image amplifying unit, the collecting unit is arranged below the magnifier and used for receiving an amplified image of the optical fiber end face, the image amplifying unit is used for amplifying the received image, the frame number processing unit is used for processing the frame number of the amplified image, and the frame number processing unit is connected with the display, the display is used for displaying the amplified end face of the optical fiber,
referring to fig. 3, a focusing wheel and an adapter are arranged on the lens adjusting base, a lens is arranged on the focusing wheel, the focusing wheel is used for adjusting the distance between the focusing wheel and the magnifier, the adapter is a clamp with a hollow center, an interface piece matched with the end face of the optical fiber is selected, the interface piece is placed at the hollow center of the adapter, and the interface piece is in sliding abutting joint with the clamp.
It should be noted that, a standard image threshold is prestored in the display, and when the image processed by the frame number processing unit is not matched with the standard image threshold, the unmatched area is locked for marking and highlighting, and the marked image is backed up.
It is worth to say that the brightness adjusting module is arranged on the adapter and polishes the hollow part in the center of the adapter.
It is worth noting that the magnifier is a 100 times fiber magnifier.
It is worth mentioning that the acquisition unit is a CDD image acquisition camera.
It should be noted that the image magnifying unit is a pre-stored image magnifying algorithm, and specifically, as follows,
[image1 drawAtPoint:CGPointMake(x,y)]；
UIImage*newimg＝UIGraphicsGetImageFromCurrentImageContext()；
UIGraphicsEndImageContext()；
return newimg；。
it should be noted that the frame number processing unit is an average filtering algorithm, and specifically includes the following steps:
import cv2
import numpy as np
def blur_demo(image):
"""
mean value fuzzy, good denoising effect for removing random noise
(1, 15) is vertical blurring, and (15, 1) is horizontal blurring
"""
dst＝cv2.blur(image，(1，15))
cv2.imshow("avg_blur_demo",dst)
def mean blur demo (image) # the mean blur has a very good noise-removing effect
dst＝cv2.medianBlur(image，5)
cv2.imshow("median_blur_demo",dst)
def custom_blur_demo(image):
"""
User-defined obfuscation
The following division by 25 is to prevent numerical overflow
"""
kernel＝np.ones([5，5],np.float32)/25
dst＝cv2.filter2D(imag，-1，kernel)cv2.imshow("custom_blur_demo",dst)
src＝cv2.imread("./fapiao.png")
img＝cv2.resize(src,None,fx＝0.8,fy＝0.8,interpolation＝cv2.INTER_CUBIC)
cv2.imshow('input_image',img)。
It is worth mentioning that if the pin end face cannot be seen in the magnifier visual field, the position adjusting knob of the magnifier is adjusted until the pattern of the pin end face is completely in the visual field and the end face pattern of the pin is the clearest, the pin end face is adjusted to the clearest state and then the end face is observed for at least 1 second, so that the observed image can be analyzed for enough time to prevent the overlooking phenomenon. When the abnormal phenomenon exists on the end face, the abnormal phenomenon is confirmed, the abnormal phenomenon can not flow to the next procedure blindly, the end face of the contact pin is checked, and the connector with good grinding effect is obtained. The end face of the optical fiber core is round and smooth, the optical fiber core is flush with the end face of the contact pin and is in a concentric ring shape, the end face is wiped on dry dust-free paper before the connector is placed into detection equipment, and if dirt (or spots) exists on the end face, the end face is wiped by using the dust-free paper and dipping pure alcohol until no dirt (or clear spots) exists on the surface. The method is characterized in that the end face is not allowed to be wiped by using dust-free paper stained with alcohol at the beginning, a clean area which is not wiped on the dust-free paper is carefully selected when the end face is wiped, the end face of the insertion core is perpendicular to the dust-free paper and is about 10mm towards one direction, the force cannot be too large, the end face is absolutely not allowed to be wiped back and forth at the same place, or the end face is in a curved line or a broken line motion, when stains which are difficult to remove exist, a small amount of alcohol can be stained in a small area of the dust-free paper, then the end face is wiped, after the end face is wiped on dry dust-free paper by using alcohol, the connector cannot be pressed to be wiped, when the connector is inserted into the adapter, the tail of the connector is held by hand, the connector cannot be sent into the adapter by only holding an optical cable, and the tail of the connector cannot be broken when the connector is stressed in the adapter.
It is worth to be noted that, if the end face fiber core is not clear, a light beam is injected from the other end to observe whether the end face has a bright point of the fiber core, and whether the fiber core is intact or not is damaged, and if the fiber core has no bright point or only has a fine bright point, it indicates that the fiber is broken or the optical fiber is seriously damaged. And (4) making a record of a repaired product, namely marking a scratch, marking a spot, marking a gap and a moon bud, then intensively classifying and determining a regrinding program according to the degree of the end surface defect, matching a connector, marking a connector end with a problem by using a label, and regrinding the connector end with an end surface defect. And when the light is not passed, the product is required to be reinstalled, the qualified product is checked to be worn, and the dustproof cap is put on to move to the next working procedure.
It should be noted that the pre-stored mean filtering method in the present invention further includes the step ofIn the measurement of the radius of curvature of the end faces, the newton's method of tour can only be used for static interferograms:
in the formula, rk+mAnd rkThe radii of the (k + m) th and k-th dark rings, respectively. Taking the first interferogram to calculate the radius of the curved surface and the offset of the vertex, firstly, carrying out binarization and edge detection, and detecting the edge contour in each level of the edge center, the radius and the circle center of the core to calculate the curvature radius and the offset of the vertex. After repeated measurements, the mean radius of curvature was 16.38 mm. The maximum error is 0.33mm, the average apex offset is 40.24M, and the maximum error is 0.97M.
In summary, by testing the fiber end faces through the integrated machine, no additional MTP/MPO prompts are required for checking one to four rows (12 to 48 fibers) of MTP/MPO connectors. The focusing wheel also provides further flexibility when inspecting individual fiber optic connectors.
Claims (7)
1. The integrated end face intelligent self-checking system based on the MPO optical fiber connector is characterized by comprising an intelligent detection all-in-one machine, wherein the intelligent detection all-in-one machine comprises an adapter, a focusing wheel, a lens adjusting base, an image processing unit, a brightness adjusting module and a display, the adapter is used for fixing the optical fiber end face, a magnifier is arranged at the bottom of the adapter, the image processing unit comprises a collecting unit, an image amplifying unit and a frame number processing unit, the frame number processing unit is connected with the collecting unit through the image amplifying unit, the collecting unit is arranged below the magnifier and used for receiving the image of the amplified optical fiber end face, the image amplifying unit is used for amplifying the received image, the frame number processing unit is used for processing the frame number of the amplified image, and the frame number processing unit is connected with the display, the display is used for displaying the amplified end face of the optical fiber,
the lens adjusting device comprises a lens adjusting base and is characterized in that a focusing wheel and an adapter are arranged on the lens adjusting base, a lens is arranged on the focusing wheel, the focusing wheel is used for adjusting the distance between the focusing wheel and a magnifying lens, the adapter is a clamp with a hollow center, an interface piece matched with the end face of an optical fiber is selected, the interface piece is placed at the hollow center of the adapter, and the interface piece is in sliding butt joint with the clamp.
2. The intelligent self-inspection system for the integrated end face of the MPO fiber optic connector according to claim 1, wherein a standard image threshold value is pre-stored in the display, and when the image passing through the frame number processing unit is not matched with the standard image threshold value, the unmatched area is locked for marking and highlighting, and the marked image is backed up.
3. The integrated end face intelligent self-checking system based on the MPO optical fiber connector according to claim 2, wherein the brightness adjusting module is arranged on the adapter and used for polishing the hollow part in the center of the adapter.
4. The integrated end face intelligent self-checking system for MPO optical fiber connectors according to claim 1, wherein the magnifier is a 100 times optical fiber magnifier.
5. The integrated intelligent self-inspection system for the end face of the MPO optical fiber connector according to claim 1, wherein the acquisition unit is a CDD image acquisition camera.
6. The integrated intelligent self-inspection system for the end face of the MPO optical fiber connector according to claim 1, wherein the image amplification unit is a pre-stored image amplification algorithm.
7. The integrated intelligent self-inspection system for the end face of the MPO optical fiber connector according to claim 1, wherein the frame number processing unit is an average filtering algorithm.
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| CN202110497335.9A CN113189716A (en) | 2021-05-07 | 2021-05-07 | Integrated end face intelligent self-checking system based on MPO optical fiber connector |
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Cited By (1)
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| CN116183611A (en) * | 2023-01-05 | 2023-05-30 | 深圳市爱德泰科技有限公司 | Detection method and device of optical fiber connector detection integrated machine |
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