CN111934756A - Optical cable route identification and fault diagnosis system and method - Google Patents
Optical cable route identification and fault diagnosis system and method Download PDFInfo
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- CN111934756A CN111934756A CN202010720736.1A CN202010720736A CN111934756A CN 111934756 A CN111934756 A CN 111934756A CN 202010720736 A CN202010720736 A CN 202010720736A CN 111934756 A CN111934756 A CN 111934756A
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- 239000013307 optical fiber Substances 0.000 claims abstract description 63
- 238000004891 communication Methods 0.000 claims abstract description 43
- 239000000835 fiber Substances 0.000 claims description 19
- 238000012360 testing method Methods 0.000 claims description 12
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- 230000005284 excitation Effects 0.000 abstract description 9
- 238000005259 measurement Methods 0.000 abstract description 5
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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
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0791—Fault location on the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- 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
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
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Abstract
The invention discloses an optical cable route identification and fault diagnosis system and method, wherein the system comprises a pulse light source, a circulator, a communication optical fiber, a photoelectric detector and a plurality of data collectors, wherein the data collectors are used for generating physical signals containing position data and unique identification information codes and acting on the outer layer of the communication optical fiber to enable the communication optical fiber at the position to return light wave signals which are strained according to a certain rule; and the main control module is used for controlling the output of the pulse light source, controlling the receiving of the photoelectric detector and identifying the light wave signal which is strained according to the rule. The optical cable routing fault diagnosis method combines optical fiber positioning, optical fiber sensing, fault diagnosis and optical fiber routing, performs strain excitation on the outer layer of the optical cable after the position data of the data acquisition unit and the unique identification information code are combined and coded, utilizes the sensing characteristic of the optical fiber, thereby realizing unique identity identification and automatic geographic position positioning of the optical fiber routing positioning, and can realize the optical cable routing fault diagnosis by repeatedly measuring the waveform intensity twice before and after the repeated measurement.
Description
Technical Field
The invention relates to the field of optical fiber communication, in particular to an optical cable route identification and fault diagnosis system and method.
Background
The existing optical cable routes need manual collection, fault diagnosis of the optical cables needs to rely on the optical cable joint boxes arranged in sections to indicate faults, the optical cables with longer distances are segmented, and the optical cable joint boxes are very inconvenient to deploy.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an optical cable route identification and fault diagnosis system which can realize unique identity identification, automatic geographic position positioning and fault diagnosis of a data acquisition unit; the invention also provides an optical cable route identification and fault diagnosis method.
According to an embodiment of the first aspect of the invention, the optical cable route identification and fault diagnosis system comprises: the pulse light source is used for outputting pulse light waves; a circulator having a first port, a second port, and a third port; the first port of the circulator is connected with the output end of the pulse light source; a communication optical fiber, one end of which is connected with the second port of the circulator; the data collectors are sequentially arranged on the communication optical fiber at intervals to form an optical cable route, and are used for generating physical signals containing position data and unique identification information codes and acting on the outer layer of the communication optical fiber to enable the communication optical fiber at the position to return light wave signals which are strained according to a certain rule; the input end of the photoelectric detector is connected with the third port of the circulator and is used for receiving the regularly strained light wave signal returned by the communication optical fiber; and the main control module is respectively and electrically connected with the pulse light source and the photoelectric detector and is used for controlling the output of the pulse light source, controlling the receiving of the photoelectric detector and identifying the optical wave signals and fault diagnosis according to the rule strain.
The optical cable route identification and fault diagnosis system according to the first embodiment of the invention has at least the following beneficial effects: the optical fiber routing fault diagnosis method combines optical fiber positioning, optical fiber sensing, fault diagnosis and optical fiber routing, performs strain excitation on the outer layer of the optical cable after the position data of the data acquisition unit and the unique identification information code are combined and coded, and utilizes the sensing characteristic of waveform change when the optical fiber is subjected to strain excitation of an external physical signal, so that unique identity identification and geographical position automatic positioning of the optical fiber routing are realized, and the fault diagnosis of the optical cable routing can be realized by repeatedly measuring the waveform intensity twice before and after repeated measurement.
According to some embodiments of the first aspect of the present invention, the data collector includes a housing, and a power supply, a control chip, a strain gauge, a positioning chip, and a wake-up switch disposed in the housing, where the power supply supplies power to the control chip, the strain gauge, the positioning chip, and the wake-up switch, the positioning chip is configured to collect position data of the data collector to provide the position data to the control chip, the wake-up switch is configured to wake up the control chip in a standby state to a working state, the control chip is configured to encode a unique identification information code and the position data of the data collector according to a certain rule and control the strain gauge to output a corresponding physical signal, and the communication fiber is in contact with the strain gauge.
According to some embodiments of the first aspect of the present invention, the housing includes an upper cover and a lower cover that are fastened to each other, the upper cover and the lower cover form a channel through which the communication optical fiber passes when fastened, the inner side of the channel has an annular groove, and a flexible circuit board is disposed in the annular groove and used for mounting the power supply, the control chip, the strain gauge, the positioning chip, and the wake-up switch.
According to some embodiments of the first aspect of the present invention, the strain gauge is an electromagnetic vibrator, a heater, or a stress generator.
According to some embodiments of the first aspect of the present invention, the strain gauge is an electromagnetic vibrator, the switching time difference of the electromagnetic vibrator is one basic signal element, the duration of the basic signal element is T0, and the waiting time of two adjacent basic signal elements is n × T0, where n is a positive integer.
According to some embodiments of the first aspect of the present invention, a trigger switch is provided on the housing to control the power supply of the power source.
According to a second aspect of the invention, the optical cable route identification and fault diagnosis method comprises the following steps: controlling a pulse light source to send pulse light waves; pulse light waves enter communication optical fibers which are sequentially provided with a plurality of data collectors at intervals through a circulator; the data acquisition unit generates a physical signal containing position data and a unique identification information code combination code, and acts on the outer layer of the communication optical fiber at the position of the data acquisition unit so as to enable the light wave signal returned by the communication optical fiber to generate strain according to a certain rule; controlling a photoelectric detector to receive the light wave signal returned by the circulator in the communication optical fiber to generate a regularly-strained light wave signal; the photoelectric detector transmits the received regularly-strained light wave signals to the main control module, and the main control module identifies the regularly-strained light wave signals to decode the position data and the unique identification information code of the data acquisition unit; recording the position data, the unique identification information code and the corresponding light wave signal strength of the data acquisition unit as initial routing information; and repeating the steps, comparing the routing information of the subsequent test with the initial routing information, and if the routing information of the subsequent test is inconsistent with the initial routing information, judging that the optical cable routing at the position has a fault.
According to the optical cable route identification and fault diagnosis method of the second embodiment of the invention, at least the following beneficial effects are achieved: the optical fiber routing fault diagnosis method combines optical fiber positioning, optical fiber sensing, fault diagnosis and optical fiber routing, performs strain excitation on the outer layer of the optical cable after the position data of the data acquisition unit and the unique identification information code are combined and coded, and utilizes the sensing characteristic of waveform change when the optical fiber is subjected to strain excitation of an external physical signal, so that unique identity identification and geographical position automatic positioning of the optical fiber routing are realized, and the fault diagnosis of the optical cable routing can be realized by repeatedly measuring the waveform intensity twice before and after repeated measurement.
According to some embodiments of the second aspect of the present invention, when the routing information of the subsequent test is compared with the initial routing information, if the optical signal strength is lower than the optical signal strength of the initial routing information, it is determined that the optical cable route at the location is attenuated; and if the routing information of the subsequent test is not detected, judging that the interruption occurs in front of the optical cable route at the position.
According to some embodiments of the second aspect of the present invention, the method for identifying and diagnosing the optical cable routing further includes calculating a distance between the data collector and the data collector, where L is t12 c r/2, where t12 is a difference between a transmission time of the pulsed light source and a reception time of the photodetector, c is an optical speed, and r is a group refractive index.
According to some embodiments of the second aspect of the present invention, the physical signal is a vibration signal, the switching time difference of the vibration signal is a basic signal element, the duration of the basic signal element is T0, and the waiting time of two adjacent basic signal elements is n × T0, where n is a positive integer.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a cable route identification and fault diagnosis system according to an embodiment of the first aspect of the present invention;
FIG. 2 is a schematic diagram of a data collector according to an embodiment of the first aspect of the present invention;
FIG. 3 is a schematic structural diagram of a data collector housing according to an embodiment of the first aspect of the present invention;
fig. 4 is a flow chart of a cable route identification and fault diagnosis method according to a second aspect of the present invention.
Reference numerals:
a pulse light source 100, a circulator 200, and a communication fiber 300;
the device comprises a data collector 400, a shell 410, an upper cover 411, a lower cover 412, a channel 413, an annular groove 414, a flexible circuit board 415, a power supply 420, a control chip 430, a strain gauge 440, a positioning chip 450, a wake-up switch 460 and a trigger switch 470;
a photoelectric detector 500 and a main control module 600.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, an optical cable route identification and fault diagnosis system according to an embodiment of a first aspect of the present disclosure includes: a pulsed light source 100 for outputting pulsed light waves; a circulator 200, the circulator 200 having a first port, a second port, and a third port; a first port of the circulator 200 is connected with an output end of the pulse light source 100; a communication fiber 300, one end of the communication fiber 300 is connected with the second port of the circulator 200; the data collectors 400 are sequentially arranged on the communication optical fiber 300 at intervals to form an optical cable route, and the data collectors 400 are used for generating physical signals containing position data and unique identification information codes and acting on the outer layer of the communication optical fiber 300 to enable the communication optical fiber 300 at the position to return light wave signals which are strained according to a certain rule; the input end of the photodetector 500 is connected with the third port of the circulator 200, and is configured to receive the regularly strained light wave signal returned by the communication optical fiber 300; the main control module 600 is an FPGA, and is electrically connected to the pulse light source 100 and the photodetector 500 respectively to control the output of the pulse light source 100, control the reception of the photodetector 500, and identify the optical wave signal and fault diagnosis according to the rule.
The circulator 200 is configured to implement coupling of light waves, output pulse light waves to the communication fiber 300, and output backward reflected and scattered light waves in the communication fiber 300 to the photodetector, the data collector 400 is configured to generate a strain frequency sequence including position data and a unique identification information code according to a certain rule, when strain occurs, a wavelength of a light wave signal reflected and scattered by the communication fiber 300 changes along with the strain frequency, and the main control module 600 controls the photodetector 500 to receive and identify the light wave signal strained according to the rule, and compares the identified light wave signal with a subsequently acquired light wave signal to implement fault diagnosis.
The optical fiber routing fault diagnosis method combines optical fiber positioning, optical fiber sensing, fault diagnosis and optical fiber routing, performs strain excitation on the outer layer of the optical cable after the position data of the data acquisition unit and the unique identification information code are combined and coded, and utilizes the sensing characteristic of waveform change when the optical fiber is subjected to strain excitation of an external physical signal, so that unique identity identification and geographical position automatic positioning of the optical fiber routing are realized, and the fault diagnosis of the optical cable routing can be realized by repeatedly measuring the waveform intensity twice before and after repeated measurement.
In some embodiments of the first aspect of the present invention, as shown in fig. 2 and fig. 3, the data collector 400 includes a housing 410, and a power supply 420, a control chip 430, an emergency device 440, a positioning chip 450, and a wake-up switch 460 disposed in the housing 410, where the power supply 420 supplies power to the control chip 430, the emergency device 440, the positioning chip 450, and the wake-up switch 460, the positioning chip 450 is configured to collect position data of the data collector 400 to provide the position data to the control chip 440, the wake-up switch 460 is configured to wake up the control chip 440 in a standby state to an operating state, the control chip 440 is configured to encode a unique identification information code with the position data of the data collector 400 according to a certain rule and control the emergency device 440 to output a corresponding physical signal, and the communication fiber 300 is in contact with the emergency device 440. The control chip 430 controls the strain gauge 400 to strain according to a certain rule, strains according to a certain time rule, converts the rule into a corresponding long short message number or 0, 1 signal, and finally preferably selects the 0, 1 signal to convert the binary code into a strain signal in combination with the operability and convenience of the system.
The positioning chip 450 is a small-sized and low-power positioning chip, and is compatible with GPS and Beidou satellite positioning. The wake-up switch 460 is a vibration switch, and when the data collector is shaken artificially, the vibration switch is started and wakes up the main control module 600 to work.
In some embodiments of the first aspect of the present invention, as shown in fig. 3, the housing 410 includes an upper cover 411 and a lower cover 412 that are fastened to each other, the upper cover 411 and the lower cover 412 are fastened to form a channel 413 for the communication optical fiber 300 to pass through, an annular groove 414 is formed inside the channel 413, a flexible circuit board 415 is disposed inside the annular groove 414, and the flexible circuit board 415 is used for mounting the power supply 420, the control chip 430, the strain gauge 440, the positioning chip 450, and the wake-up switch 460. The power supply 420 is a flexible battery, and considering that the system is in a standby state for a long time and the service life required by the actual user is not long, a relatively thin flexible battery may be used.
In some embodiments of the first aspect of the present invention, the housing 410 is provided with a trigger switch 470 for controlling the power supply of the power source 420. The trigger switch 470 uses the depression bar to press and touch, the power supply is closed when the depression bar is touched, when the intelligent connector box is used, the depression bar needs to be pulled out, the power supply starts to supply power after the depression bar is pulled out, and the system works normally. In order to save energy, a trigger switch 470 is needed, and the data collector 400 is started only when the upper cover and the lower cover are fixed on the optical cable and the optical cable contacts the trigger switch 470; the starting frequency of the positioning chip 450 is started once at a long time interval; the vibration signal transmission is started for a long time, so that the energy consumption is saved.
In some embodiments of the first aspect of the present invention, the strain gauge 440 is an electromagnetic vibrator, a heater, or a stress generator. However, considering factors such as time control and energy consumption control (for example, the heater is not beneficial to heat dissipation control), and finally considering the use of an electromagnetic control vibrator; the single vibration has certain characteristics of the vibration waveform, but because the single vibration is influenced by factors such as interference, distance and the like, the accuracy rate is risky when an accurate characteristic point needs to be identified, but the scheme only identifies the vibration and continuous vibration time, and the method is easy to realize.
In some embodiments of the first aspect of the present invention, the strain gauge 440 is an electromagnetic vibrator, the switching time difference of the electromagnetic vibrator is one basic signal element, the duration of the basic signal element is T0, and the waiting time of two adjacent basic signal elements is n × T0, where n is a positive integer. The wake-up switch 460 is a vibration switch, and the starting force of the vibration switch is larger than that of the electromagnetic vibrator, so that the vibration switch is prevented from being interfered when the electromagnetic vibrator vibrates; when a fault point is searched on site, the data acquisition device can be shaken vigorously, the shaking force triggers the vibration switch, the vibration switch is started, and the data information of the time length is responded to the optical cable in a vibration mode; if the main control module 600 of the master station system can check the information of the data collector and the information is consistent with the initial data, it indicates that the optical cable in front of the data collector is normal, if the energy is weakened, attenuation occurs in front of the point, and if the data collector is not detected, it is considered that interruption occurs in front of the point.
As shown in fig. 4, a method for identifying and diagnosing a fault of an optical cable route according to a second embodiment of the present invention includes the following steps: controlling a pulse light source to send pulse light waves; pulse light waves enter communication optical fibers which are sequentially provided with a plurality of data collectors at intervals through a circulator; the data acquisition unit generates a physical signal containing position data (such as longitude and latitude) and a unique identification information code combination code (according to a certain binary marshalling rule, a combination of strain time and interval time is formed), and acts on the outer layer of the communication optical fiber at the position of the data acquisition unit so that a light wave signal returned by the communication optical fiber is strained according to a certain rule; controlling a photoelectric detector to receive the light wave signal returned by the circulator in the communication optical fiber to generate a regularly-strained light wave signal; the photoelectric detector transmits the received regularly-strained light wave signals to the main control module, and the main control module identifies the regularly-strained light wave signals to decode the position data and the unique identification information code of the data acquisition unit; recording the position data, the unique identification information code and the corresponding light wave signal strength of the data acquisition unit as initial routing information; and repeating the steps, comparing the routing information of the subsequent test with the initial routing information, and if the routing information of the subsequent test is inconsistent with the initial routing information, judging that the optical cable routing at the position has a fault.
The optical fiber routing fault diagnosis method combines optical fiber positioning, optical fiber sensing, fault diagnosis and optical fiber routing, performs strain excitation on the outer layer of the optical cable after the position data of the data acquisition unit and the unique identification information code are combined and coded, and utilizes the sensing characteristic of waveform change when the optical fiber is subjected to strain excitation of an external physical signal, so that unique identity identification and geographical position automatic positioning of the optical fiber routing are realized, and the fault diagnosis of the optical cable routing can be realized by repeatedly measuring the waveform intensity twice before and after repeated measurement.
In some embodiments of the second aspect of the present invention, the physical signal is a vibration signal, a temperature signal or a stress signal. When the optical fiber is affected by external environment (such as temperature, pressure, vibration, etc.), parameters such as intensity, phase, frequency, polarization state, etc. of the transmitted light in the optical fiber will change correspondingly.
In some embodiments of the second aspect of the present invention, when the routing information of the subsequent test is compared with the initial routing information, if the optical signal intensity is lower than the optical signal intensity of the initial routing information, it is determined that the optical cable route at the location is attenuated; and if the routing information of the subsequent test is not detected, judging that the interruption occurs in front of the optical cable route at the position.
In some embodiments of the second aspect of the present invention, the method for identifying and diagnosing the optical cable routing further includes calculating a distance between the data collector and the data collector, where L is t12 c r/2, where t12 is a difference between a transmission time of the pulsed light source and a reception time of the photodetector, c is an optical speed, and r is a group refractive index.
In some embodiments of the second aspect of the present invention, the physical signal is a vibration signal, the switching time difference of the vibration signal is one basic signal element, the duration of the basic signal element is T0, and the waiting time of two adjacent basic signal elements is n × T0, where n is a positive integer.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An optical cable routing identification and fault diagnosis system, comprising:
a pulsed light source (100) for outputting a pulsed light wave;
a circulator (200), the circulator (200) having a first port, a second port, a third port; the first port of the circulator (200) is connected with the output end of the pulse light source (100);
a communication fiber (300), one end of the communication fiber (300) being connected with a second port of the circulator (200);
the data acquisition units (400) are sequentially arranged on the communication optical fiber (300) at intervals to form an optical cable route, and the data acquisition units (400) are used for generating physical signals containing position data and unique identification information codes and acting on the outer layer of the communication optical fiber (300) to enable the communication optical fiber (300) at the position to return light wave signals which are strained according to a certain rule;
the input end of the photoelectric detector (500) is connected with the third port of the circulator (200) and is used for receiving the regularly strained light wave signal transmitted back by the communication optical fiber (300);
and the main control module (600) is respectively and electrically connected with the pulse light source (100) and the photoelectric detector (500) and is used for controlling the output of the pulse light source (100), controlling the receiving of the photoelectric detector (500), and identifying the regularly-strained light wave signal and diagnosing faults.
2. The fiber optic cable route identification and fault diagnosis system of claim 1, wherein: the data collector (400) comprises a shell (410), and a power supply (420), a control chip (430), a strain gauge (440), a positioning chip (450) and a wake-up switch (460) which are arranged in the shell (410), the power supply (420) supplies power to the control chip (430), the strain gauge (440), the positioning chip (450) and the wake-up switch (460), the positioning chip (450) is used for collecting the position data of the data collector (400) to be provided for the control chip (440), the wake-up switch (460) is used for waking up the control chip (440) in a standby state to an operating state, the control chip (440) is used for encoding the unique identification information code and the position data of the data collector (400) in a combined mode according to a certain rule and controlling the strain gauge (440) to output a corresponding physical signal, and the communication optical fiber (300) is in contact with the strain gauge (440).
3. The fiber optic cable route identification and fault diagnosis system of claim 2, wherein: casing (410) are including upper cover (411), lower cover (412) that mutual lock connects, constitute when upper cover (411), lower cover (412) lock and have passageway (413) that supply communication fiber (300) to wear to establish, passageway (413) inboard has annular groove (414), be provided with flexible circuit board (415) in annular groove (414), flexible circuit board (415) are used for installing power (420), control chip (430), strainers (440), location chip (450), awaken switch (460).
4. The fiber optic cable route identification and fault diagnosis system of claim 2, wherein: the strain gauge (440) is an electromagnetic vibrator, a heater, or a stress generator.
5. The fiber optic cable route identification and fault diagnosis system of claim 2, wherein: the strain gauge (440) is an electromagnetic vibrator, the switching time difference of the electromagnetic vibrator is a basic signal element, the duration of the basic signal element is T0, and the waiting time of two adjacent basic signal elements is n T0, wherein n is a positive integer.
6. The fiber optic cable route identification and fault diagnosis system of claim 2, wherein: the shell (410) is provided with a trigger switch (470) for controlling the power supply of the power supply (420).
7. An optical cable route identification and fault diagnosis method is characterized in that: comprises the following steps
Controlling a pulse light source to send pulse light waves;
pulse light waves enter communication optical fibers which are sequentially provided with a plurality of data collectors at intervals through a circulator;
the data acquisition unit generates a physical signal containing position data and a unique identification information code combination code, and acts on the outer layer of the communication optical fiber at the position of the data acquisition unit so as to enable the light wave signal returned by the communication optical fiber to generate strain according to a certain rule;
controlling a photoelectric detector to receive the light wave signal returned by the circulator in the communication optical fiber to generate a regularly-strained light wave signal;
the photoelectric detector transmits the received regularly-strained light wave signals to the main control module, and the main control module identifies the regularly-strained light wave signals to decode the position data and the unique identification information code of the data acquisition unit;
recording the position data, the unique identification information code and the corresponding light wave signal strength of the data acquisition unit as initial routing information;
and repeating the steps, comparing the routing information of the subsequent test with the initial routing information, and if the routing information of the subsequent test is inconsistent with the initial routing information, judging that the optical cable routing at the position has a fault.
8. The fiber optic cable routing identification and fault diagnosis method of claim 7, wherein: when the routing information of the subsequent test is compared with the initial routing information, if the intensity of the optical wave signal is lower than that of the optical wave signal of the initial routing information, the optical cable routing attenuation at the position is judged; and if the routing information of the subsequent test is not detected, judging that the interruption occurs in front of the optical cable route at the position.
9. The fiber optic cable routing identification and fault diagnosis method of claim 7, wherein: and calculating the distance of the data acquisition unit, wherein the distance L is t12 c r/2, t12 is the difference between the sending time of the pulse light source and the receiving time of the photoelectric detector, c is the speed of light, and r is the refractive index of the group.
10. The fiber optic cable routing identification and fault diagnosis method of claim 7, wherein: the physical signal is a vibration signal, the switching time difference of the vibration signal is a basic signal element, the duration of the basic signal element is T0, and the waiting time of two adjacent basic signal elements is n T0, wherein n is a positive integer.
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| CN113037369A (en) * | 2021-05-12 | 2021-06-25 | 高勘(广州)技术有限公司 | Optical fiber route detection system and corresponding route detection method |
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