CN110958049B - Optical fiber fault point positioning device and method based on optical time domain reflectometer - Google Patents
Optical fiber fault point positioning device and method based on optical time domain reflectometer Download PDFInfo
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- CN110958049B CN110958049B CN201811043028.8A CN201811043028A CN110958049B CN 110958049 B CN110958049 B CN 110958049B CN 201811043028 A CN201811043028 A CN 201811043028A CN 110958049 B CN110958049 B CN 110958049B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 91
- 239000013307 optical fiber Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000017525 heat dissipation Effects 0.000 claims abstract description 29
- 238000012360 testing method Methods 0.000 claims description 27
- 238000005192 partition Methods 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 238000005728 strengthening Methods 0.000 claims description 2
- 210000000707 wrist Anatomy 0.000 abstract description 11
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
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Abstract
The invention discloses an optical fiber fault point positioning device and method based on an optical time domain reflectometer, which comprises a shell, a display, a switch, a heat dissipation hole, a fixing plate, a first belt, a fixing needle, a fixing ring, a second belt, a fixing hole, a heat dissipation groove, a filter screen, a rotary table, a stepped hole, an adjuster, a converter, a signal processor, an industrial control module and a groove, wherein the display is installed at the top end of the shell, the optical time domain reflectometer has a scientific and reasonable structure and is safe and convenient to use, heat is generated inside the optical time domain reflectometer when the optical time domain reflectometer works, the heat rises and is exhausted from the heat dissipation hole, outside cold air continuously flows into the shell from the heat dissipation groove to promote air circulation inside the shell and accelerate heat dissipation efficiency, the fixing plate is sleeved outside a wrist, the second belt is inserted into the fixing ring according to the thickness of the wrist, the fixing needle is matched with the fixing hole, so that the device is fixed with the wrist of a worker, the staff of being convenient for wears to be convenient for operate the device.
Description
Technical Field
The invention relates to the technical field of optical fiber fault point positioning, in particular to an optical fiber fault point positioning device and method based on an optical time domain reflectometer.
Background
The transmission optical cable is inevitably damaged due to artificial damage, geological disasters and the like, and in the process of optical cable breakpoint rush repair and optical cable line fault correction, 80% of time is used for searching the position of a fault point, so that how to quickly and accurately determine the position of the fault point is the most important problem in optical cable line maintenance work.
But the optic fibre fault point location on the existing market is not only complicated in structure, and the function is single moreover, and among the current optic fibre fault point positioner, the radiating effect of device is relatively poor, thereby the device is inside to save heat easily and leads to, and inside electrical components receives the damage, and the staff makes needs hand-held device to operate at operating means, and the staff of being inconvenient for carries out other operations, can not change the device angle according to staff's operation needs simultaneously.
Disclosure of Invention
The present invention provides an optical fiber fault point positioning device and method based on an optical time domain reflectometer, so as to solve the problems proposed in the background art.
In order to solve the technical problems, the invention provides the following technical scheme: an optical fiber fault point positioning device based on an optical time domain reflectometer comprises a shell, a display, a switch, heat dissipation holes, a fixing plate, a first belt, a fixing needle, a fixing ring, a second belt, a fixing hole, heat dissipation grooves, a filter screen, a rotary disc, a stepped hole, a positioning hole, a sliding chute, a rotary shaft, a limiting plate, a mounting hole, a spring, a ball, a first clapboard, a second clapboard, a laser emitter, an amplifier, a regulator, a converter, a signal processor, an industrial control module and a groove, wherein the display is installed at the top end of the shell, the switch is arranged on the outer side of the top end of the shell, the heat dissipation holes are respectively formed on the two sides of the top end of the shell, the heat dissipation grooves are respectively formed on the two sides of the shell, the filter screen is arranged inside the heat dissipation grooves, the first clapboard is arranged inside the shell, the laser emitter is installed on one side of the top end of the first clapboard, the amplifier is installed on the other side of the top end of the first clapboard, a second clapboard is arranged in the shell, a regulator is arranged on one side of the top end of the second clapboard, a converter is arranged on the other side of the top end of the second clapboard, a signal processor is arranged on one side of the bottom end of the shell, an industrial control module is arranged on the other side of the bottom end of the shell, a groove is formed in the center of the bottom end of the shell, a rotary table is arranged in the groove, a rotary shaft is arranged in the center of the groove, a stepped hole is formed in the center of the rotary table and sleeved inside the stepped hole, a limiting plate is arranged at the bottom of the rotary shaft inside the stepped hole, positioning holes are formed around the top end of the rotary table, a sliding groove is formed in the top end of the rotary table, a mounting hole is formed in one side of the groove, a spring is arranged at one end of the mounting hole, a ball is arranged at one end of the spring, a fixing plate is arranged at the bottom end of the rotary table, and a first belt is arranged at one end of the fixing plate, a fixing ring is installed at one end of the first belt, a fixing needle is sleeved on the outer side of the fixing ring, a second belt is installed at the other end of the fixing plate, and a fixing hole is formed in the outer side of the second belt.
An optical fiber fault point positioning method based on an optical time domain reflectometer comprises the following steps: step one, installation; step two, pulse adjustment; setting a refractive index; step four, analyzing the waveform; step five, determining the region; sixthly, positioning a fault point;
in the first step, the end face of the tested optical fiber is wiped by using dust-free paper or dust-free cloth matched with absolute alcohol, dirt and dust on the surface of the tested optical fiber are removed, the tested optical fiber and the tail optical fiber are welded by using an optical fiber welding machine, and then the movable joint is connected with the output end of the optical time domain reflectometer.
In the second step, according to the length and attenuation of the measured optical fiber, a proper measuring range and the width of the optical pulse are selected, and the proper measuring range, the output pulse width, the gain and the like are adjusted, so that a back scattering signal curve of the measured optical fiber is displayed on the optical time domain reflectometer, and the instrument which is as same as the finished hour is adopted as much as possible during measurement, so as to keep the consistency of the instrument.
In the third step, an optical fiber backscattering curve is measured by using the optical time domain reflectometer according to the optical fiber refractive index, the refractive index of the optical time domain reflectometer is accurately adjusted by means of the attenuation point of the optical fiber joint, so that the length of each optical fiber is equal to the length of the corresponding optical cable on the optical distribution table, and the measured refractive index on the optical time domain reflectometer is the optical cable refractive index, so that the phenomenon that the optical fiber length is larger than the optical cable length is eliminated, and the test error is reduced.
In the fourth step, the optical time domain reflectometer is operated, the automatic test is clicked on the main menu interface, the optical time domain reflectometer is enabled to turn on the light source to start the test, the test track displayed on the screen is continuously refreshed, the test is completed after about 10 seconds, the completed test track is displayed on the screen, and the optical fiber fault is diagnosed according to the tested oscillogram.
In the fifth step, because the optical cable refraction is introduced as the test refractive index of the optical time domain reflectometer, at the moment, the distance displayed by the cursor at the tail end of the curve is regarded as the distance between the optical cable fault point and the test end, according to the Fresnel reflection peak displayed by the optical time domain reflectometer, the cursor is moved and positioned at the front point just before the rising of the Fresnel reflection peak, the position of the fault point is displayed on the coordinate axis of the optical time domain reflectometer, meanwhile, the completion data and the optical cable line operation data are combined for contrastive analysis, and after accurate positioning, the optical cable line personnel actually observes and patrols on site to find the region range where the fault point is located.
In the sixth step, after the optical cable line arrives at the site, the real-time waveform change of the system interface is observed by knocking the earth surface of the optical cable line, so that the distance from the knocking position to the test point can be quickly and accurately obtained, the distance from the knocking position to the fault point is determined, the fault point position is quickly and accurately found, and the correction and the modification of the fault point are completed.
According to the technical scheme, the bottom of the fixing plate is provided with the fixing bolt, the top end of the rotary table is provided with the bolt hole, and the fixing plate and the rotary table are connected in a matched mode through the fixing bolt and the bolt hole.
According to the technical scheme, the bottom of the fixing plate is provided with the rubber pad, and the bottom of the rubber pad is provided with the anti-skid grains.
According to the technical scheme, a sealing ring is arranged at the joint of the heat dissipation groove and the filter screen, and sealing glue is coated on the outer side of the sealing ring.
According to the technical scheme, the air holes are formed in the outer sides of the first partition plate and the second partition plate.
According to the technical scheme, the mounting groove is formed in the outer side of the shell, and the reinforcing ribs are arranged in the mounting groove.
According to the technical scheme, the limiting plate is circular, and the limiting plate is in clearance fit with the stepped hole.
Compared with the prior art, the invention has the following beneficial effects: the invention has scientific and reasonable structure and safe and convenient use, when the optical time domain reflectometer works, heat is generated inside, the heat rises and is exhausted from the heat dissipation holes, outside cold air continuously flows into the shell from the heat dissipation grooves, the air circulation inside the shell is promoted, the heat dissipation efficiency is accelerated, the fixing plate is sleeved outside the wrist, the second belt is inserted into the fixing ring according to the thickness of the wrist, the fixing pin is matched with the fixing hole, so that the device is fixed with the wrist of a worker, the device is convenient to wear by the worker, the device is convenient to operate, when the worker operates the optical time domain reflectometer, the shell is rotated to rotate the rotating shaft inside the stepped hole, when the wrist is rotated to be vertical, the spring pushes out the ball, the ball is coincided with the positioning hole, so that the position of the shell is fixed, the worker can operate the shell conveniently, and the shell can be rotated after the operation is finished, the shell is parallel to the arm, so that the shell does not hinder the staff from carrying out other operations.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the stepped bore mounting arrangement of the present invention;
FIG. 3 is a schematic view of the turntable mounting structure of the present invention;
FIG. 4 is a schematic view of a spindle mounting arrangement of the present invention;
FIG. 5 is a schematic view of a first bulkhead mounting arrangement of the invention;
FIG. 6 is a schematic diagram of the process flow structure of the present invention;
in the figure: 1. a housing; 2. a display; 3. a switch; 4. heat dissipation holes; 5. a fixing plate; 6. a first belt; 7. a fixing pin; 8. a fixing ring; 9. a second belt; 10. a fixing hole; 11. a heat sink; 12. a filter screen; 13. a turntable; 14. a stepped hole; 15. positioning holes; 16. a chute; 17. a rotating shaft; 18. a limiting plate; 19. mounting holes; 20. a spring; 21. a ball bearing; 22. a first separator; 23. a second separator; 24. a laser transmitter; 25. an amplifier; 26. a regulator; 27. a converter; 28. a signal processor; 29. an industrial control module; 30. and (4) a groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides an optic fibre fault point positioner based on optical time domain reflectometer, including shell 1, display 2, switch 3, louvre 4, fixed plate 5, first belt 6, fixed needle 7, solid fixed ring 8, second belt 9, fixed orifices 10, radiating groove 11, filter screen 12, carousel 13, shoulder hole 14, locating hole 15, spout 16, pivot 17, limiting plate 18, mounting hole 19, spring 20, ball 21, first baffle 22, second baffle 23, laser emitter 24, amplifier 25, regulator 26, converter 27, signal processor 28, industrial control module 29 and recess 30, its characterized in that: the display 2 is arranged at the top end of the shell 1, the switch 3 is arranged at the outer side of the top end of the shell 1, the heat dissipation holes 4 are arranged at two sides of the top end of the shell 1, the heat dissipation grooves 11 are arranged at two sides of the shell 1, the filter screen 12 is arranged in the heat dissipation grooves 11, the first clapboard 22 is arranged in the shell 1, the laser emitter 24 is arranged at one side of the top end of the first clapboard 22, the amplifier 25 is arranged at the other side of the top end of the first clapboard 22, the second clapboard 23 is arranged in the shell 1, the regulator 26 is arranged at one side of the top end of the second clapboard 23, the converter 27 is arranged at the other side of the top end of the second clapboard 23, the signal processor 28 is arranged at one side of the bottom end of the shell 1, the industrial control module 29 is arranged at the other side of the bottom end of the shell 1, the groove 30 is arranged in the groove 30, the rotary table 13 is arranged in the center of the groove 30, the rotary shaft 17 is arranged in the center of the rotary table 13, and the stepped hole 14 is arranged at the center of the rotary table 13, and pivot 17 cup joints inside stepped hole 14, 14 inside being located pivot 17 bottoms in stepped hole is provided with limiting plate 18, locating hole 15 has all been seted up all around on carousel 13 top, spout 16 has been seted up on carousel 13 top, mounting hole 19 has been seted up to the inside one side of recess 30, spring 20 is installed to the inside one end of mounting hole 19, ball 21 is installed to spring 20 one end, fixed plate 5 is installed to carousel 13 bottom, first belt 6 is installed to fixed plate 5 one end, solid fixed ring 8 is installed to first belt 6 one end, gu fixed ring 8 has cup jointed fixed needle 7 in the outside, second belt 9 is installed to the fixed plate 5 other end, fixed hole 10 has been seted up in the second belt 9 outside.
Referring to fig. 6, the present invention provides a technical solution: an optical fiber fault point positioning method based on an optical time domain reflectometer comprises the following steps: step one, installation; step two, pulse adjustment; setting a refractive index; step four, analyzing the waveform; step five, determining the region; sixthly, positioning a fault point; the method is characterized in that:
in the first step, the end face of the tested optical fiber is wiped by using dust-free paper or dust-free cloth matched with absolute alcohol, dirt and dust on the surface of the tested optical fiber are removed, the tested optical fiber and the tail optical fiber are welded by using an optical fiber welding machine, and then the movable joint is connected with the output end of the optical time domain reflectometer.
In the second step, according to the length and attenuation of the measured optical fiber, a proper measuring range and the width of the optical pulse are selected, and the proper measuring range, the output pulse width, the gain and the like are adjusted, so that a back scattering signal curve of the measured optical fiber is displayed on the optical time domain reflectometer, and the instrument which is as same as the finished hour is adopted as much as possible during measurement, so as to keep the consistency of the instrument.
In the third step, an optical fiber backscattering curve is measured by using the optical time domain reflectometer according to the optical fiber refractive index, the refractive index of the optical time domain reflectometer is accurately adjusted by means of the attenuation point of the optical fiber joint, so that the length of each optical fiber is equal to the length of the corresponding optical cable on the optical distribution table, and the measured refractive index on the optical time domain reflectometer is the optical cable refractive index, so that the phenomenon that the optical fiber length is larger than the optical cable length is eliminated, and the test error is reduced.
In the fourth step, the optical time domain reflectometer is operated, the automatic test is clicked on the main menu interface, the optical time domain reflectometer is enabled to turn on the light source to start the test, the test track displayed on the screen is continuously refreshed, the test is completed after about 10 seconds, the completed test track is displayed on the screen, and the optical fiber fault is diagnosed according to the tested oscillogram.
In the fifth step, because the optical cable refraction is introduced as the test refractive index of the optical time domain reflectometer, at the moment, the distance displayed by the cursor at the tail end of the curve is regarded as the distance between the optical cable fault point and the test end, according to the Fresnel reflection peak displayed by the optical time domain reflectometer, the cursor is moved and positioned at the front point just before the rising of the Fresnel reflection peak, the position of the fault point is displayed on the coordinate axis of the optical time domain reflectometer, meanwhile, the completion data and the optical cable line operation data are combined for contrastive analysis, and after accurate positioning, the optical cable line personnel actually observes and patrols on site to find the region range where the fault point is located.
According to above-mentioned technical scheme, fixed plate 5 bottom is provided with fixing bolt, and the bolt hole has been seted up on carousel 13 top, and fixed plate 5 passes through fixing bolt and bolt hole cooperation with carousel 13 to be connected, and better messenger's carousel 13 carries out zonulae occludens with fixed plate 5 to and convenient to detach and installation.
According to the technical scheme, the rubber pad is arranged at the bottom of the fixing plate 5, the anti-skidding lines are arranged at the bottom of the rubber pad, the friction force at the bottom of the fixing plate 5 is better increased, and the fixing plate 5 is prevented from sliding.
According to the technical scheme, the joint of the heat dissipation groove 11 and the filter screen 12 is provided with the sealing ring, and the sealing ring is coated with the sealant.
According to the technical scheme, the air holes are formed in the outer sides of the first partition plate 22 and the second partition plate 23, so that the air permeability between the first partition plate 22 and the second partition plate 23 is improved better.
According to the technical scheme, the mounting groove has been seted up in the shell 1 outside, and the mounting groove is inside to be provided with the strengthening rib, and 1 intensity of better reinforcing shell prolongs its life.
According to the above technical scheme, the shape of the limiting plate 18 is circular, the limiting plate 18 and the stepped hole 14 are in clearance fit, and the limiting plate 18 can rotate inside the stepped hole 14 better.
The working principle is as follows: the display 2 is installed on the top end of the shell 1, the switch 3 is arranged on the outer side of the top end of the shell 1, the heat dissipation holes 4 are formed in two sides of the top end of the shell 1, the heat dissipation grooves 11 are formed in two sides of the shell 1, the filter screen 12 is arranged in the heat dissipation grooves 11, when the optical time domain reflectometer works, heat is generated in the optical time domain reflectometer, the heat rises and is discharged from the heat dissipation holes 4, external cold air continuously flows into the shell 1 from the heat dissipation grooves 11, circulation of air in the shell 1 is promoted, heat dissipation efficiency is improved, the filter screen 12 effectively prevents external dust and impurities from entering the shell 1, so that electric elements in the optical time domain reflectometer are damaged, the first partition plate 22 is arranged in the shell 1, the laser emitter 24 is installed on one side of the top end of the first partition plate 22, the amplifier 25 is installed on the other side of the top end of the first partition plate 22, the second partition plate 23 is arranged in the shell 1, and the regulator 26 is arranged on one side of the top end of the second partition plate 23, the other side of the top end of the second clapboard 23 is provided with a converter 27, one side of the bottom end of the shell 1 is provided with a signal processor 28, the other side of the bottom end of the shell 1 is provided with an industrial control module 29, devices in the device are installed in a layered mode, the unstable signal condition caused by the mutual interference of optical fibers of the output end and the input end of each component part is avoided, the output end of the laser transmitter 24 is connected with the input end of the amplifier 25, the output end of the amplifier 25 is connected with the input end of the regulator 26, the output end of the regulator 26 is connected with the switch 3, the switch 3 is connected with the converter 27, the converter 27 is connected with the signal processor 28, then the signal processor 28 is connected with the industrial control module 29 of the device, the industrial control module 29 is connected with the display 2, the center of the bottom end of the shell 1 is provided with a groove 30, a turntable 13 is arranged in the groove 30, the bottom end of the turntable 13 is provided with a fixing plate 5, one end of the fixing plate 5 is provided with a first belt 6, a fixing ring 8 is installed at one end of a first belt 6, a fixing needle 7 is sleeved outside the fixing ring 8, a second belt 9 is installed at the other end of the fixing plate 5, a fixing hole 10 is formed in the outer side of the second belt 9, when a worker tests, the fixing plate 5 is sleeved outside a wrist, the second belt 9 is inserted into the fixing ring 8 according to the thickness of the wrist, the fixing needle 7 is matched with the fixing hole 10, so that the device is fixed with the wrist of the worker, a rotating shaft 17 is installed at the center of a groove 30, a stepped hole 14 is formed at the center of a rotary plate 13, the rotating shaft 17 is sleeved inside the stepped hole 14, a limiting plate 18 is arranged inside the stepped hole 14 and positioned at the bottom of the rotating shaft 17, positioning holes 15 are formed all around the top end of the rotary plate 13, a sliding groove 16 is formed at the top end of the rotary plate 13, a mounting hole 19 is formed in one side inside the groove 30, a spring 20 is installed at one end inside the mounting hole 19, a ball 21 is installed at one end of the spring 20, when the staff operates the optical time domain reflectometer, rotate shell 1 and make pivot 17 rotate in that shoulder hole 14 is inside, rotate when perpendicular as for the wrist, spring 20 is ejecting with ball 21, makes ball 21 and locating hole 15 coincide to make shell 1 position fix, the staff of being convenient for operates, can rotate shell 1 after treating the operation completion, makes shell 1 parallel with the arm, thereby does not hinder the staff and carries out other operations.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides an optic fibre fault point positioner based on optical time domain reflectometer, including shell (1), display (2), switch (3), louvre (4), fixed plate (5), first belt (6), fixed needle (7), solid fixed ring (8), second belt (9), fixed orifices (10), radiating groove (11), filter screen (12), carousel (13), shoulder hole (14), locating hole (15), spout (16), pivot (17), limiting plate (18), mounting hole (19), spring (20), ball (21), first baffle (22), second baffle (23), laser emitter (24), amplifier (25), regulator (26), converter (27), signal processor (28), industry control module (29) and recess (30), its characterized in that: the display (2) is installed at the top end of the shell (1), the switch (3) is arranged on the outer side of the top end of the shell (1), heat dissipation holes (4) are formed in two sides of the top end of the shell (1), heat dissipation grooves (11) are formed in two sides of the shell (1), a filter screen (12) is arranged in each heat dissipation groove (11), a first partition plate (22) is arranged in the shell (1), a laser transmitter (24) is installed on one side of the top end of the first partition plate (22), an amplifier (25) is installed on the other side of the top end of the first partition plate (22), a second partition plate (23) is arranged in the shell (1), an adjuster (26) is arranged on one side of the top end of the second partition plate (23), a converter (27) is arranged on the other side of the top end of the second partition plate (23), and a signal processor (28) is installed on one side of the bottom end of the shell (1), the industrial control module (29) is arranged on the other side of the bottom end of the shell (1), a groove (30) is formed in the center of the bottom end of the shell (1), a rotary table (13) is arranged inside the groove (30), a rotary shaft (17) is installed in the center of the groove (30), a stepped hole (14) is formed in the center of the rotary table (13), the rotary shaft (17) is sleeved inside the stepped hole (14), a limiting plate (18) is arranged inside the stepped hole (14) and located at the bottom of the rotary shaft (17), positioning holes (15) are formed in the periphery of the top end of the rotary table (13), a sliding groove (16) is formed in the top end of the rotary table (13), a mounting hole (19) is formed in one side of the inside of the groove (30), a spring (20) is installed at one end of the inside of the mounting hole (19), a ball (21) is installed at one end of the spring (20), and a fixing plate (5) is installed at the bottom end of the rotary table (13), first belt (6) is installed to fixed plate (5) one end, solid fixed ring (8) is installed to first belt (6) one end, gu fixed needle (7) have been cup jointed in fixed ring (8) outside, second belt (9) is installed to fixed plate (5) other end, fixed orifices (10) have been seted up in the second belt (9) outside.
2. The optical fiber fault point positioning device based on the optical time domain reflectometer as claimed in claim 1, wherein: the bottom of the fixing plate (5) is provided with a fixing bolt, the top end of the rotary table (13) is provided with a bolt hole, and the fixing plate (5) and the rotary table (13) are connected in a matched mode through the fixing bolt and the bolt hole.
3. The optical fiber fault point positioning device based on the optical time domain reflectometer as claimed in claim 1, wherein: the bottom of the fixed plate (5) is provided with a rubber pad, and the bottom of the rubber pad is provided with anti-skid grains.
4. The optical fiber fault point positioning device based on the optical time domain reflectometer as claimed in claim 1, wherein: and a sealing ring is arranged at the joint of the heat dissipation groove (11) and the filter screen (12), and a sealing glue is coated on the outer side of the sealing ring.
5. The optical fiber fault point positioning device based on the optical time domain reflectometer as claimed in claim 1, wherein: air holes are formed in the outer sides of the first partition plate (22) and the second partition plate (23).
6. The optical fiber fault point positioning device based on the optical time domain reflectometer as claimed in claim 1, wherein: the mounting groove has been seted up in the shell (1) outside, the inside strengthening rib that is provided with of mounting groove.
7. The optical fiber fault point positioning device based on the optical time domain reflectometer as claimed in claim 1, wherein: the limiting plate (18) is circular, and the limiting plate (18) is in clearance fit with the stepped hole (14).
8. A method for positioning an optical fiber fault point positioning device based on an optical time domain reflectometer as claimed in any of claims 1-7, comprising the steps of: step one, installation; step two, pulse adjustment; setting a refractive index; step four, analyzing the waveform; step five, determining the region; sixthly, positioning a fault point; the method is characterized in that:
in the first step, the end face of the tested optical fiber is wiped by using dust-free paper or dust-free cloth matched with absolute alcohol, dirt and dust on the surface of the tested optical fiber are removed, the tested optical fiber and the tail optical fiber are welded by using an optical fiber welding machine, and then the movable joint is connected with the output end of the optical time domain reflectometer;
in the second step, according to the length and attenuation of the measured optical fiber, selecting a proper measuring range and the width of the optical pulse, adjusting a proper measuring range, outputting pulse width, gain and the like, so that a back scattering signal curve of the measured optical fiber is displayed on the optical time domain reflectometer, and adopting an instrument which is as same as the finished working hour as possible during measurement so as to keep the consistency of the instrument;
in the third step, an optical fiber backscattering curve is measured by using an optical time domain reflector according to the refractive index of the optical fiber, the refractive index of the optical time domain reflector is accurately adjusted by means of the attenuation point of the optical fiber joint, so that the length of each optical fiber is equal to the length of the corresponding optical cable on the optical distribution table, and the measured and determined refractive index on the optical time domain reflector is the refractive index of the optical cable, so that the phenomenon that the length of the optical fiber is larger than the length of the optical cable is eliminated, and the test error is reduced;
in the fourth step, the optical time domain reflectometer is operated, the automatic test is clicked on the interface of the main menu, the optical time domain reflectometer is enabled to turn on the light source to start the test, the test track displayed on the screen is continuously refreshed, after about 10 seconds, the test is completed, the completed test track is displayed on the screen, and the optical fiber fault is diagnosed according to the tested oscillogram;
in the fifth step, because the optical cable refraction is introduced as the test refractive index of the optical time domain reflectometer, at the moment, the distance displayed by the cursor at the tail end of the curve is considered as the distance between the fault point of the optical cable and the test end, according to the Fresnel reflection peak displayed by the optical time domain reflectometer, the cursor is moved and positioned at the front point of the rising Fresnel reflection peak, the position of the fault point is displayed on the coordinate axis of the optical time domain reflectometer, meanwhile, the completion data and the optical cable line operation data are combined for contrastive analysis, and after accurate positioning, the optical cable line personnel actually observes and patrols on site to find the area range where the fault point is located;
in the sixth step, after the optical cable line arrives at the site, the real-time waveform change of the system interface is observed by knocking the earth surface of the optical cable line, so that the distance from the knocking position to the test point can be quickly and accurately obtained, the distance from the knocking position to the fault point is determined, the fault point position is quickly and accurately found, and the correction and the modification of the fault point are completed.
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|---|---|---|---|---|
| CN102394693A (en) * | 2011-11-01 | 2012-03-28 | 上海电信工程有限公司 | Method for accurately positioning fault points of optical cables |
| CN205081788U (en) * | 2015-10-26 | 2016-03-09 | 世宇金峰（北京）信息技术有限公司 | A OTDR device for communicating by letter optical cable fault point location with report an emergency and ask for help or increased vigilance function |
| CN105683730A (en) * | 2013-10-25 | 2016-06-15 | 光纳株式会社 | Fiber optic biodiagnostic sensor system and vascular insertion type device for measuring pressure distribution |
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| US9417444B2 (en) * | 2013-05-01 | 2016-08-16 | Lightel Technologies, Inc. | User-friendly wireless fiber optic endface inspector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102394693A (en) * | 2011-11-01 | 2012-03-28 | 上海电信工程有限公司 | Method for accurately positioning fault points of optical cables |
| CN105683730A (en) * | 2013-10-25 | 2016-06-15 | 光纳株式会社 | Fiber optic biodiagnostic sensor system and vascular insertion type device for measuring pressure distribution |
| CN205081788U (en) * | 2015-10-26 | 2016-03-09 | 世宇金峰（北京）信息技术有限公司 | A OTDR device for communicating by letter optical cable fault point location with report an emergency and ask for help or increased vigilance function |
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Denomination of invention: An Optical Fiber Fault Location Device and Method Based on Optical Time Domain Reflectometer Effective date of registration: 20221205 Granted publication date: 20220401 Pledgee: Industrial Bank Co.,Ltd. Shanghai Branch Pledgor: Hailong oil group (Shanghai) Information Technology Co.,Ltd. Registration number: Y2022310000358 |
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Denomination of invention: A fiber optic fault location device and method based on optical time-domain reflectometer Granted publication date: 20220401 Pledgee: Industrial Bank Co.,Ltd. Shanghai Changning sub branch Pledgor: Hailong oil group (Shanghai) Information Technology Co.,Ltd.|HILONG Group OF COMPANIES Registration number: Y2024310000406 |