CN220525279U - Optical fiber attenuation simulator - Google Patents

Abstract

The utility model provides an optical fiber attenuation simulator, which comprises a pressing table, wherein an optical cable placing groove and a moving mechanism are arranged on the pressing table; the moving mechanism moves back and forth towards the notch direction of the optical cable placing groove; the pressure head is arranged on the moving mechanism and is used for contacting and extruding the optical cable in the optical cable placing groove in the process that the moving mechanism moves towards the notch direction of the optical cable placing groove; the pressure sensor is arranged on the moving mechanism and used for detecting the acting force of the pressure head on the optical cable; the stroke sensor is arranged on the moving mechanism and used for detecting the displacement of the pressure head after the pressure head contacts the optical cable; the pressure monitoring meter is electrically connected with the pressure sensor; and the indentation monitoring table is electrically connected with the stroke sensor. The utility model can perform the optical fiber attenuation point simulation test on the optical cable and can ensure that the optical cable is prevented from being damaged.

Description

Optical fiber attenuation simulator

Technical Field

The utility model relates to the technical field of communication, in particular to an optical fiber attenuation simulator.

Background

The optical cable is used as a carrier for information transmission, not only in the communication field, but also in other fields such as military, electric power and the like, and carries the continuous development of human science and technology, and the important role is self-evident. However, when the optical cable has a broken core (no cable is broken), or the optical power attenuation of a certain part of the optical fiber becomes large, the difficulty in finding the fault position is very large, because: (1) The broken fiber point or the attenuation point landform of the optical cable path soil sampling is overturned, and the landform can not be searched by taking the landform as a reference; (2) The buried stone or the sunken marker stone extrudes the optical fiber to enlarge attenuation, and the optical fiber cannot be positioned by taking the target position as a reference; (3) The fiber attenuation is increased due to the fact that the end faces of the steel groove or the steel pipe and the like are prevented from being too strong, and the fiber cannot be judged by taking a specific place as a reference; (4) The meter mark information on the optical cable body is worn when the optical cable is constructed, distributed and dragged, and cannot be calculated by taking meter mark data as a reference; (5) When the optical cable is laid, the difference between the more S-bend length and the actual mileage is larger, and the equivalent distance cannot be used as a reference for measurement; the main reason is that the optical cable is mostly buried underground, belongs to hidden engineering, and reserves exist at special positions such as optical cable joints, bridges and culverts, machine room introduction and the like, and the reserved length has larger error in actual construction.

In the conventional optical cable fiber breaking or attenuation point searching, a more effective method is adopted at present, an optical time domain reflectometer (English is called optical time-domain reflectometer, OTDR for short) tests the length of a fault point, and the approximate mileage of the fault point is estimated. To facilitate locating the fault point, it is common to excavate the junction box nearest to the estimated location. The OTDR is set to be monitored in real time, the 1550nm wavelength is used, the 1550nm is more sensitive to the microbending of the optical fiber than the 1310nm wavelength, and the 1550nm wavelength can be attenuated under the microbending, so that the OTDR belongs to the optical fiber communication principle. And a spare fiber in the artificial bending connector box is tested out by using the OTDR (optical time domain reflectometer) to the length of the connector box by utilizing the light guiding principle of the fiber, and the distance from the fault point to the connector box is calculated by the difference value to determine the fault point. However, this method is to find the box nearest to the fault point and open the box as a precondition, however, there are difficulties in finding the box: (1) Whether the optical cable joint box is buried in the position easily is found, often because of the longer time limit the position is buried in to the benchmarking or the benchmarking is lost, optical cable route diagram data have the mistake, and the landform changes etc. cause to seek the degree of difficulty also very big. It is supposed that the excavation of the joint pit of 1 meter or 10 meters and 20 meters is a great deal of time and labor. (2) When the length of the distribution plate is 2KM or 3KM in the construction of a trunk optical cable, the distance between optical cable joints is 2KM or 3KM, and after the joint box is found, if the joint box is more than hundreds of meters away from a fault point or spans a plurality of bridge culverts, rivers and other special places, the difficulty of finding broken fiber points or attenuation points is quite high.

Disclosure of Invention

In order to solve the technical problems that the difficulty is high when the OTDR is adopted to search the fault point of the interval optical cable at present, and the standby optical fiber in the optical cable joint box is needed to be adopted, so that the labor and time consumption in the process of searching the fault of the interval optical cable are high, the utility model provides the optical fiber attenuation simulator which can deform the optical cable under pressure, attenuate the optical fiber and avoid damaging the inside of the optical cable.

The embodiment of the utility model provides an optical fiber attenuation simulator, which comprises the following components:

the optical cable placing groove and the moving mechanism are arranged on the pressing table; the moving mechanism moves back and forth towards the notch direction of the optical cable placing groove;

the pressure head is arranged on the moving mechanism and is used for contacting and extruding the optical cable in the optical cable placing groove in the process that the moving mechanism moves towards the notch direction of the optical cable placing groove;

the pressure sensor is arranged on the moving mechanism and used for detecting the acting force of the pressure head on the optical cable;

the stroke sensor is arranged on the moving mechanism and used for detecting the displacement of the pressure head after the pressure head contacts the optical cable;

the pressure monitoring meter is electrically connected with the pressure sensor;

and the indentation monitoring table is electrically connected with the stroke sensor.

In one embodiment, the inner cavity of the optical cable placing groove is provided with decompression cotton at two ends in the length direction.

In one embodiment, the cable placement groove is arcuate.

In one embodiment, the cross section of the inner cavity of the optical cable placing groove in the thickness direction is semicircular, and the diameter of the cross section of the inner cavity of the optical cable placing groove is matched with the optical cable.

In one embodiment, the contact part of the pressure head, which is in contact with the optical cable, adopts a strip-shaped full-inclined-surface design, and the surface is smooth and has no edges.

In one embodiment, a sliding groove is formed in the side, opposite to the moving mechanism, of the pressing table, and the travel sensor is placed in the sliding groove;

the bottom of the sliding groove is provided with a sliding opening, and the moving mechanism passes through the sliding opening and is connected with the travel sensor.

In one embodiment, the press table is concave, and the optical cable placing groove and the moving mechanism are arranged at two ends in the concave part of the press table.

In one embodiment, the pressure sensor is disposed within a recess of the platen; the moving mechanism comprises a pressure arm; the pressure arm is provided with threads, one end of the pressure arm is in threaded fit with a threaded hole formed in the inner wall of the depression of the pressure table, and penetrates out of the threaded hole to be connected with the pressure sensor; the pressure head is fixed on the pressure sensor.

In one embodiment, the system further comprises an alarm electrically connected to the pressure sensor.

In one embodiment, the device further comprises a bracket mounted below the platen.

In one embodiment, the stent is L-shaped.

In one embodiment, the stand is a height adjustable stand.

In one embodiment, a long strip-shaped opening is formed in the middle of the bracket, and the long strip-shaped opening extends along the height direction of the bracket;

the support passes through the rectangular form opening through elasticity nut with the platform is connected.

In one embodiment, the four brackets are symmetrically arranged on two opposite sides of the bottom of the pressing table.

Compared with the prior art, the optical fiber attenuation simulator provided by the utility model has at least the following beneficial effects:

the found optical cable is placed in the optical cable placing groove, the moving mechanism drives the pressure head to move and squeeze the optical cable in the optical cable placing groove, so that the optical fiber generates an optical power attenuation phenomenon, and an attenuation point is simulated. Meanwhile, the pressure sensor is arranged to detect the pressure born by the optical cable and the pressure is displayed by the pressure monitoring meter; the displacement that starts to march after the pressure head contacted the optical cable is measured through travel sensor to show through indentation monitoring table, so that the tester looks over pressure and the outward appearance deformation condition that the optical cable received through pressure monitoring table and indentation monitoring table, thereby control the atress to the optical cable through the march of control mobile mechanism, avoid the optical cable damage, need not to use the reserve fine in the joint box promptly, just need not to blindly look for the joint box yet, compression trouble searching time, the manpower and the time that consume during the trouble searching are saved.

Drawings

The utility model will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:

FIG. 1 shows a schematic structure of an optical fiber attenuation simulator of the present utility model;

FIG. 2 is a schematic diagram of another view of the fiber attenuation simulator of the utility model;

FIG. 3 shows a schematic front and side view of a indenter of the fiber attenuation simulator of the utility model;

FIG. 4 shows a front, side and enlarged schematic view of a holder in a fiber attenuation simulator of the utility model;

fig. 5 shows a schematic application of the optical fiber attenuation simulator of the utility model.

In the drawings, like parts are designated with like reference numerals. The figures are not to scale.

Reference numerals: the pressure sensor comprises a 1-indentation monitoring meter, a 2-pressure monitoring meter, a 3-optical cable placing groove, 4-decompression cotton, a 5-pressure head, a 6-pressure sensor, a 7-pressure table, an 8-bracket, a 9-pressure arm, a 10-stroke sensor, an 11-elastic nut, a 12-strip-shaped opening, a 13-sliding opening and a 14-sliding groove.

Detailed Description

The utility model will be further described with reference to the accompanying drawings.

Example 1

The embodiment of the utility model provides an optical fiber attenuation simulator which is suitable for an optical cable with an outer diameter within 20 mm. The optical fiber attenuation simulator comprises a pressing table 7, an optical cable placing groove 3, a moving mechanism, a pressure sensor 6, a pressing head 5, a pressure monitoring meter 2, a travel sensor 10 and an indentation monitoring meter 1. The pressing table 7 is provided with an optical cable placing groove 3 and a moving mechanism. The moving mechanism moves reciprocally toward the notch direction of the optical cable placing groove 3. The pressure head 5 contacts and extrudes the optical cable in the optical cable placing groove 3 in the process that the moving mechanism moves towards the notch direction of the optical cable placing groove 3; the pressure sensor 6 detects the acting force of the pressure head 5 on the optical cable; the stroke sensor 10 detects the displacement of the pressure head 5 after contacting the optical cable; a stroke sensor 10 provided in the moving mechanism and detecting the displacement of the indenter 5 after contacting the optical cable; a pressure monitoring meter 2 electrically connected to the pressure sensor 6; the indentation monitoring table 1 is electrically connected to the stroke sensor 10.

Specifically, as shown in fig. 1 and 2, the pressing table 7 is concave, and the optical cable placing groove 3 and the moving mechanism are disposed at two ends in the concave portion of the pressing table 7. The pressure sensor 6 is disposed in a recess of the platen 7. The moving mechanism comprises a pressure arm 9; the pressure arm 9 is provided with threads, one end of the pressure arm 9 is in threaded fit with a threaded hole formed in the inner wall of the concave part of the pressing table 7, and penetrates out of the threaded hole to be connected with the pressure sensor 6; the ram 5 is fixed to the pressure sensor 6. The other end of the pressure arm 9 can be additionally provided with a handle, thereby facilitating the use of force.

A sliding groove 14 is formed in the side, opposite to the moving mechanism, of the pressing table 7, and the stroke sensor 10 is placed in the sliding groove 14; the bottom of the sliding groove 14 is provided with a sliding opening 13, and the moving mechanism is connected with the travel sensor 10 through the sliding opening 13. In this embodiment, the stroke sensor 10 is fixedly connected to the pressure arm 9, and the manner of the fixed connection may be threaded connection, adhesion, or the like.

Further, the two ends of the inner cavity of the optical cable placing groove 3 in the length direction are provided with decompression cotton 4, so that the situation that the edges of the two ends of the optical cable placing groove 3 are additionally stressed to damage the optical cable under the condition that the positions are stressed in the operation process is avoided.

Further, the optical cable placing groove 3 is in an arc shape, so that the optical cable placed in the optical cable placing groove 3 is in a micro-bending state, and attenuation is easier to obtain.

In specific application, the length of the optical cable placing groove 3 is 13cm, and the diameter of the optical cable placing groove is 40cm. In other embodiments, the length and diameter of the cable receiving slot 3 may be adjusted according to the cable being targeted.

Further, the cross section of the inner cavity of the optical cable placing groove 3 in the thickness direction is semicircular, and the diameter of the cross section of the inner cavity of the optical cable placing groove 3 is matched with the optical cable, so that the optical cable is stable and reliable in groove entering, the optical cable is ensured not to move or deviate under pressure, and the optical cable is always positioned in the upper and lower central positions of the cable groove.

In a specific application, the semicircular diameter of the cross section of the inner cavity of the optical cable placing groove 3 is 18mm, so that the optical cable placing groove is suitable for placing commonly used optical cables.

Further, as shown in fig. 3, the contact part of the pressure head 5, which is in contact with the optical cable, adopts a strip-shaped full-inclined-surface design, and the surface is smooth and has no edges. The optical cable body stress is met, compared with stones with irregular shapes, the damage to the optical cable body is reduced to the minimum, the optical cable body is recovered after the operation is finished, the optical cable is slightly deformed, and the indentation of the optical cable after appearance repair is not more than 0.5mm.

In a specific application, the pressure head 5 is 20mm in height, 10mm in width and 9mm in thickness. In other embodiments, the size of the ram 5 may be adjusted according to the diameter and type of fiber optic cable.

Further, the optical fiber attenuation simulator provided by the embodiment further comprises a support 8, wherein the support 8 is installed below the pressing table 7. The support 8 is L-shaped and is a height-adjustable support 8.

Specifically, as shown in fig. 4, a strip-shaped opening 12 is formed in the middle of the bracket 8, and the strip-shaped opening 12 extends along the height direction of the bracket 8; the bracket 8 is connected with the pressing table 7 through the strip-shaped opening 12 by a tightening nut 11. The height of the support 8 can be adjusted by adjusting the elastic nut 11 up and down, so that the optical fiber attenuation simulator is convenient to use on uneven ground.

In a specific application, as shown in fig. 1 and 2, the four brackets 8 are symmetrically disposed on opposite sides of the platen 7. The four brackets 8 are L-shaped and are independently installed, the positions of the brackets 8 are adjusted up and down through loosening the elastic nuts 11 until the positions are adjusted to proper positions, and the elastic nuts 11 are screwed down, so that the height of the brackets 8 is adjusted. The fiber attenuation simulator is balanced by adjusting the heights of the four brackets 8 to adapt to the unevenness of the ground.

Further, the optical fiber attenuation simulator provided in this embodiment further includes an alarm, and the alarm is electrically connected to the pressure sensor 6. The alarm upper limit value of the alarm can be set according to optical cables with different diameters and types so as to prevent the optical cables from being damaged by heavy pressure.

Specific test examples three types of fiber optic cable were extracted: GYSTA53-24D (6 tubes 4 cores), GYSTA 53-48B1 (6 tubes 8 cores), GYSTA 53-96B1 (12 tubes 8 cores) were tested. And (3) randomly extracting 2 fibers from each bundle of tubes of the 24-core optical cable and 48-core optical cable, and randomly extracting 1 fiber from each bundle of tubes of 96A to access the tail fibers for testing.

As shown in the application diagram of fig. 5, the OTDR is powered on to set a real-time mode, the waveform is selected to 1550nm, the screen ordinate scale of the OTDR is selected to be 0.5db/div, 1db/div or 2db/div, and the screen abscissa scale is selected to be 20m/div, 50m/div or 100m/div according to the length of the test cable. Here, the selection of the ordinate and the abscissa of the OTDR screen is mainly based on the test length, and more importantly, the small value is selected on the premise that the ordinate curve is displayed as intuitively as possible.

The heights of the four brackets 8 are adjusted, so that the optical fiber attenuation simulator is stably placed. And naturally placing the tested optical cable into the optical cable placing groove 3, and starting up and monitoring the pressure monitoring table 2 and the indentation monitoring table 1. The pressure arm 9 on the optical fiber attenuation simulator is rotated to move forward, and the pressure head 5 is driven to extrude the tested optical cable. In order to avoid damaging the optical cable in inexperienced and data-free operations, each step of increasing the pressure by not more than 50N is performed, the test optical fiber curve is recorded until the optical fiber is attenuated, the OTDR test curve is suddenly changed or attenuation value is gradually increased somewhere, and the length of the optical cable at the simulation point is measured. Test data are shown in the following table.

When the optical fiber attenuation simulator provided by the embodiment is actually applied to the search of the fault point of the interval optical cable, an optical time domain reflectometer (English name: optical time-domain reflectometer, OTDR for short) for optical cable connection is found, the optical cable is placed in the optical cable placing groove 3, then the moving mechanism is controlled to move towards the optical cable placing groove 3, the pressure head 5 gradually touches the optical cable placed in the optical cable placing groove, and at the moment, the stroke sensor 10 is set to zero; the moving mechanism continues to move, the optical cable deforms under the extrusion of the pressure head 5, and the optical fiber attenuates. When the attenuation mutation point is seen on the OTDR, the attenuation mutation point value is recorded, and the test is ended. In the process that the moving mechanism continuously drives the pressure head 5 to extrude the optical cable, a tester knows the pressure and appearance deformation condition suffered by the optical cable through the pressure monitoring table 2 and the indentation monitoring table 1, so that the advancing of the moving mechanism is controlled, the stress on the optical cable is controlled, the optical cable is prevented from being damaged, the optical cable for testing does not need to adopt the standby fiber in the junction box through the optical fiber attenuation simulator provided by the embodiment, the junction box is not required to be searched blindly, the fault searching time is shortened, and the labor and time consumed during the fault searching are saved.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "bottom," "top," "front," "rear," "inner," "outer," "left," "right," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

Although the utility model herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present utility model. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present utility model as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.

Claims (14)

1. A fiber attenuation simulator, comprising:

the optical cable placing groove and the moving mechanism are arranged on the pressing table; the moving mechanism moves back and forth towards the notch direction of the optical cable placing groove;

the pressure head is arranged on the moving mechanism and is used for contacting and extruding the optical cable in the optical cable placing groove in the process that the moving mechanism moves towards the notch direction of the optical cable placing groove;

the pressure sensor is arranged on the moving mechanism and used for detecting the acting force of the pressure head on the optical cable;

the stroke sensor is arranged on the moving mechanism and used for detecting the displacement of the pressure head after the pressure head contacts the optical cable;

the pressure monitoring meter is electrically connected with the pressure sensor;

and the indentation monitoring table is electrically connected with the stroke sensor.

2. The optical fiber attenuation simulator according to claim 1, wherein both ends of the inner cavity of the optical cable placement groove in the length direction are provided with pressure-reducing cotton.

3. The fiber attenuation simulator of claim 1, wherein the cable placement groove is arcuate.

4. The optical fiber attenuation simulator according to claim 1, wherein a cross section of the inner cavity of the optical cable placement groove in a thickness direction is semicircular, and a diameter of the inner cavity cross section of the optical cable placement groove matches an optical cable.

5. The optical fiber attenuation simulator according to claim 1, wherein the contact part of the pressure head, which is in contact with the optical cable, adopts a strip-shaped full-slope design, and the surface is smooth and has no edges.

6. The optical fiber attenuation simulator according to claim 1, wherein a sliding groove is formed in the side, opposite to the moving mechanism, of the pressing table, and the travel sensor is placed in the sliding groove;

the bottom of the sliding groove is provided with a sliding opening, and the moving mechanism passes through the sliding opening and is connected with the travel sensor.

7. The fiber attenuation simulator of claim 1, wherein the press table is concave, and the cable placement groove and the moving mechanism are disposed at both ends in the concave portion of the press table.

8. The fiber optic attenuation simulator of claim 7, wherein the pressure sensor is disposed within a recess of the platen; the moving mechanism comprises a pressure arm; the pressure arm is provided with threads, one end of the pressure arm is in threaded fit with a threaded hole formed in the inner wall of the depression of the pressure table, and penetrates out of the threaded hole to be connected with the pressure sensor; the pressure head is fixed on the pressure sensor.

9. The fiber optic attenuation analog instrument according to claim 1, further comprising an alarm electrically connected to the pressure sensor.

10. The fiber attenuation simulator of claim 1, further comprising a bracket mounted below the platen.

11. The fiber attenuation simulator of claim 10, wherein the bracket is L-shaped.

12. The fiber attenuation simulator of claim 10, wherein the bracket is a height adjustable bracket.

13. The optical fiber attenuation simulator according to claim 12, wherein a long strip-shaped opening is formed in the middle of the bracket, and the long strip-shaped opening extends along the height direction of the bracket;

the support passes through the rectangular form opening through elasticity nut with the platform is connected.

14. The fiber attenuation simulator of claim 10, wherein the four brackets are symmetrically disposed on opposite sides of the platen bottom.