CN111917467B - System and method for diagnosing field operation optical cable joint fault based on optical fiber coding - Google Patents
System and method for diagnosing field operation optical cable joint fault based on optical fiber coding Download PDFInfo
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- CN111917467B CN111917467B CN202010721292.3A CN202010721292A CN111917467B CN 111917467 B CN111917467 B CN 111917467B CN 202010721292 A CN202010721292 A CN 202010721292A CN 111917467 B CN111917467 B CN 111917467B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 156
- 239000013307 optical fiber Substances 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000003745 diagnosis Methods 0.000 claims abstract description 33
- 238000004891 communication Methods 0.000 claims abstract description 24
- 239000000835 fiber Substances 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 7
- 230000002618 waking effect Effects 0.000 claims 1
- 230000005284 excitation Effects 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
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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
- H04B10/0791—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 a field operation optical cable joint fault diagnosis system and method based on optical fiber codes, wherein the system comprises a light source, a circulator and communication optical fibers, a plurality of field operation optical cable joints are arranged on the communication optical fibers, and optical fiber codes are arranged on optical fiber sections in the field operation optical cable joints; the main control module is respectively electrically connected with the pulse light source and the photoelectric detector and 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. In the embodiment, the position data of the field operation optical cable joint and the optical fiber code number are combined and coded and then are subjected to strain excitation on the field operation optical cable joint, and the unique identification characteristic and the sensing characteristic of the optical fiber code are utilized, so that the unique identity identification and the automatic geographic position positioning of the field operation optical cable joint are realized, and the fault diagnosis of the field operation optical cable joint can be realized 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 a field operation optical cable joint fault diagnosis system and method based on optical fiber coding.
Background
The information of the existing field operation optical cable joint needs manual collection, and the fault diagnosis of the field operation optical cable joint needs manual investigation and fault diagnosis which are arranged in a segmented mode, so that the efficiency is very low.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a field operation optical cable joint fault diagnosis system based on optical fiber coding, which can realize unique identity identification, automatic geographic position positioning and fault diagnosis of the field operation optical cable joint; the invention also provides a field operation optical cable joint fault diagnosis method based on the optical fiber coding.
According to the embodiment of the first aspect of the invention, the field optical cable joint fault diagnosis system based on optical fiber coding comprises: a light source for outputting a light wave signal; a circulator having a first port, a second port, and a third port; a first SOA optical switch is arranged between the first port of the circulator and the output end of the light source; one end of the communication optical fiber is connected with the second port of the circulator, a plurality of field operation optical cable joints are arranged on the communication optical fiber, and optical fiber codes are arranged on optical fiber sections in the field operation optical cable joints; the data collectors are respectively connected with the field operation optical cable joints in a one-to-one correspondence mode, and are used for generating physical signals containing position data and optical fiber code numbers and acting on the outer layer of the communication optical fiber so that optical fiber codes return optical wave signals which are strained according to a certain rule; a second SOA optical switch is arranged between the input end of the photoelectric detector and the third port of the circulator and is used for receiving the regularly strained light wave signal returned by the optical fiber code; 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 field operation optical cable joint identification and fault diagnosis system according to the first embodiment of the invention has at least the following beneficial effects: according to the embodiment, optical fiber positioning, optical fiber sensing, fault diagnosis and field operation optical cable joint are combined, strain excitation is carried out on the field operation optical cable joint after the position data of the field operation optical cable joint and the optical fiber code number are combined and coded, the unique identification characteristic and the sensing characteristic of the optical fiber code are utilized, so that the unique identity identification and the automatic geographic position positioning of the field operation optical cable joint are realized, and the fault diagnosis of the field operation optical cable joint can be realized by repeatedly measuring the waveform strength twice.
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 combine and encode an optical fiber code number 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 one side of the optical fiber code 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 passage through which the field optical cable connector passes when fastened, the inner side of the passage 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 field optical cable joint comprises a male plug and a female plug, the male plug comprises a joint housing and an optical fiber ferrule, the optical fiber section where the optical fiber code is located in the male plug, and the end of the optical fiber section is connected to the optical fiber ferrule, and the optical fiber ferrule is used for being rapidly connected with the female plug.
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 the second aspect of the invention, the field optical cable joint fault diagnosis method based on the optical fiber coding comprises the following steps: controlling a light source to send a light wave signal; the light wave signal generates pulse light waves through the first SOA optical switch, the pulse light waves enter the communication optical fiber provided with a plurality of field operation optical cable joints through the circulator, and optical fiber codes are arranged on optical fiber sections in the field operation optical cable joints; the data acquisition unit generates a physical signal containing position data of the field optical cable joint and the optical fiber code number combination code, and acts on the outer layer of the field optical cable joint at the position of the optical fiber code, so that the optical wave signal returned by the optical fiber code is strained according to a certain rule; the photoelectric detector is controlled to receive the light wave signal returned by the circulator in the communication optical fiber through the switching time of the second SOA optical switch to generate pulse light waves which are strained according to rules; 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 optical fiber coding number of the field optical cable joint; recording the position data, the optical fiber code number and the corresponding light wave signal intensity of the field operation optical cable joint as initial field operation optical cable joint information; and repeating the steps, comparing the field operation optical cable joint information of the subsequent test with the initial field operation optical cable joint information, and judging that the field operation optical cable joint at the position has a fault if the field operation optical cable joint information and the initial field operation optical cable joint information are inconsistent.
According to the field optical cable joint fault diagnosis method based on the optical fiber coding, the method has the following beneficial effects that: according to the embodiment, optical fiber positioning, optical fiber sensing, fault diagnosis and field operation optical cable joint are combined, strain excitation is carried out on the field operation optical cable joint after the position data of the field operation optical cable joint and the optical fiber code number are combined and coded, the unique identification characteristic and the sensing characteristic of the optical fiber code are utilized, so that the unique identity identification and the automatic geographic position positioning of the field operation optical cable joint are realized, and the fault diagnosis of the field operation optical cable joint can be realized by repeatedly measuring the waveform strength twice.
According to some embodiments of the second aspect of the present invention, when the subsequently tested field optical cable joint information is compared with the initial field optical cable joint information, if the optical signal strength is lower than the optical signal strength of the initial field optical cable joint information, it is determined that the field optical cable joint at the location is attenuated; and if the information of the field optical cable joint in the subsequent test is not detected, judging that the interruption occurs in front of the field optical cable joint at the position.
According to some embodiments of the second aspect of the present invention, the method for diagnosing field operation optical cable joint faults based on optical fiber coding 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 sending time of the pulsed light source and a receiving 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 field operations cable joint 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 perspective view of a male plug according to an embodiment of the first aspect of the present invention;
FIG. 5 is a schematic cross-sectional view of a male plug according to an embodiment of the first aspect of the present invention;
fig. 6 is a flow chart of a field operations cable joint fault diagnosis method according to a second aspect of the present invention.
Reference numerals:
the device comprises a pulse light source 100, a circulator 200, a first SOA optical switch 210, a second SOA optical switch 220, a communication optical fiber 300 and an optical fiber code 310;
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;
the optical fiber field operation optical cable connector comprises a photoelectric detector 500, a main control module 600, a field operation optical cable connector 700, a male plug 710, a connector shell 711, an optical fiber inserting core 712 and a female plug 720.
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, a field optical cable joint fault diagnosis system based on optical fiber coding according to an embodiment of a first aspect of the present disclosure includes: a light source 100 for outputting a lightwave signal; a circulator 200, the circulator 200 having a first port, a second port, and a third port; a first SOA optical switch 210 is arranged between the first port of the circulator 200 and the output end of the light source 100; a communication optical fiber 300, one end of the communication optical fiber 300 is connected with the second port of the circulator 200, a plurality of field operation optical cable joints 700 are arranged on the communication optical fiber 300, and optical fiber sections in the field operation optical cable joints 700 are provided with optical fiber codes 310; the data collectors 400 are respectively connected with the field operation optical cable joints 700 in a one-to-one correspondence manner, and the data collectors 400 are used for generating physical signals containing position data and optical fiber code numbers and acting on the outer layer of the communication optical fiber 300 so as to enable the optical fiber code 310 to return light wave signals which are strained according to a certain rule; a second SOA optical switch 220 is arranged between an input end of the photodetector 500 and the third port of the circulator 200, and is configured to receive the regularly strained light wave signal returned by the optical fiber code 310; the main control module 600 is electrically connected to the pulsed light source 100 and the photodetector 500 respectively for controlling the output of the pulsed light source 100, controlling the receiving of the photodetector 500, and identifying the regularly-strained light wave signal and performing fault diagnosis.
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 regular strain frequency sequence including position data and fiber code numbers, when strain occurs, wavelength changes of light wave signals reflected and scattered by the fiber code 310 of the communication fiber 300 occur synchronously along with the strain frequency, and the main control module 600 controls the receiving of the photodetector 500 and identifies the regularly strained light wave signals.
According to the embodiment, optical fiber positioning, optical fiber sensing, fault diagnosis and field operation optical cable joint are combined, strain excitation is carried out on the field operation optical cable joint after the position data of the field operation optical cable joint and the optical fiber code number are combined and coded, the unique identification characteristic and the sensing characteristic of the optical fiber code are utilized, so that the unique identity identification and the automatic geographic position positioning of the field operation optical cable joint are realized, and the fault diagnosis of the field operation optical cable joint can be realized by repeatedly measuring the waveform strength twice.
In some embodiments of the first aspect of the present invention, as shown in fig. 2 and 3, according to some embodiments of the first aspect of the present invention, the data collector 400 comprises a housing 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 housing 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 provide the position data to the control chip 440, the wake-up switch 460 is used to wake up the control chip 440 in a standby state to an operating state, the control chip 440 is configured to encode the fiber code number and the position data of the data collector 400 according to a certain rule, and control the strain gauge 440 to output a corresponding physical signal, where one side of the fiber code 310 is in contact with the strain gauge 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 passage 413 for the field optical cable joint 700 to pass through, the inside of the passage 413 has an annular groove 414, a flexible circuit board 415 is disposed in 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, as shown in fig. 4 and 5 in combination with fig. 1, the field optical cable joint 700 includes a male plug 710 and a female plug 720, the male plug 710 includes a joint housing 711 and a fiber stub 712, the fiber segment where the fiber code 310 is located in the male plug 710 and the end of the fiber stub is connected to the fiber stub 712, and the fiber stub 712 is configured to be connected to the female plug 720.
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. 6, a field optical cable joint fault diagnosis method based on optical fiber coding according to a second aspect of the present invention includes the following steps: controlling a light source to send a light wave signal; the light wave signal generates pulse light waves through the first SOA optical switch, the pulse light waves enter the communication optical fiber provided with a plurality of field operation optical cable joints through the circulator, and optical fiber codes are arranged on optical fiber sections in the field operation optical cable joints; the data acquisition unit generates a physical signal containing position data (such as longitude and latitude) of the field optical cable joint and an optical fiber code number 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 field optical cable joint at the position of the optical fiber code, so that an optical wave signal returned by the optical fiber code is strained according to a certain rule; the photoelectric detector is controlled to receive the light wave signal returned by the circulator in the communication optical fiber through the switching time of the second SOA optical switch to generate pulse light waves which are strained according to rules; 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 optical fiber coding number of the field optical cable joint; recording the position data, the optical fiber code number and the corresponding light wave signal intensity of the field operation optical cable joint as initial field operation optical cable joint information; and repeating the steps, comparing the field operation optical cable joint information of the subsequent test with the initial field operation optical cable joint information, and judging that the field operation optical cable joint at the position has a fault if the field operation optical cable joint information and the initial field operation optical cable joint information are inconsistent.
According to the embodiment, optical fiber positioning, optical fiber sensing, fault diagnosis and field operation optical cable joint are combined, strain excitation is carried out on the field operation optical cable joint after the position data of the field operation optical cable joint and the optical fiber code number are combined and coded, the unique identification characteristic and the sensing characteristic of the optical fiber code are utilized, so that the unique identity identification and the automatic geographic position positioning of the field operation optical cable joint are realized, and the fault diagnosis of the field operation optical cable joint can be realized by repeatedly measuring the waveform strength twice.
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 field optical cable joint information of the subsequent test is compared with the initial field optical cable joint information, if the optical signal intensity is lower than the optical signal intensity of the initial field optical cable joint information, it is determined that the field optical cable joint at the position is attenuated; and if the information of the field optical cable joint in the subsequent test is not detected, judging that the interruption occurs in front of the field optical cable joint at the position.
In some embodiments of the second aspect of the present invention, the method for diagnosing field operation optical cable joint faults based on optical fiber coding further includes calculating a distance between the data acquisition device and the data acquisition device, where the distance 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 (9)
1. A field operations optical cable joint fault diagnosis system based on optical fiber coding, characterized by comprising:
a light source (100) for outputting a lightwave signal;
a circulator (200), the circulator (200) having a first port, a second port, a third port; a first SOA optical switch (210) is arranged between the first port of the circulator (200) and the output end of the light source (100);
the communication optical fiber (300), one end of the communication optical fiber (300) is connected with the second port of the circulator (200), a plurality of field operation optical cable joints (700) are arranged on the communication optical fiber (300), and optical fiber codes (310) are arranged on optical fiber sections in the field operation optical cable joints (700);
the data collectors (400) are respectively connected with the field optical cable joints (700) in a one-to-one corresponding mode, and the data collectors (400) are used for generating physical signals containing position data and optical fiber code numbers and acting on the outer layer of the communication optical fiber (300) to enable the optical fiber codes (310) to return optical wave signals which are strained according to a certain rule;
a second SOA optical switch (220) is arranged between the input end of the photoelectric detector (500) and the third port of the circulator (200) and is used for receiving the regularly strained light wave signal returned by the optical fiber code (310);
the main control module (600) is respectively and electrically connected with the light source (100) and the photoelectric detector (500) and is used for controlling the output of the light source (100), controlling the receiving of the photoelectric detector (500) and identifying the optical wave signals strained according to the rule and diagnosing faults;
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 (430), the wake-up switch (460) is used for waking up the control chip (430) in a standby state to a working state, the control chip (430) is used for carrying out combined coding on the optical fiber coding number and the position data of the data acquisition unit (400) according to a certain rule and controlling the strain gauge (440) to output a corresponding physical signal, one side of the fiber code (310) is in contact with the strain gauge (440).
2. The field operations optical cable joint fault diagnostic system of claim 1, 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 the confession field operations optical cable connects (700) passageway (413) of wearing 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), positioning chip (450), awaken switch (460).
3. The field operations optical cable joint fault diagnostic system of claim 1, wherein: the field operation optical cable joint (700) comprises a male plug (710) and a female plug (720), the male plug (710) comprises a connector shell (711) and an optical fiber inserting core (712), the optical fiber section where the optical fiber code (310) is located in the male plug (710) and the end part of the optical fiber is connected to the optical fiber inserting core (712), and the optical fiber inserting core (712) is used for being rapidly connected with the female plug (720).
4. The field operations optical cable joint fault diagnostic system of claim 1, 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.
5. The field operations optical cable joint fault diagnostic system of claim 1, wherein: the shell (410) is provided with a trigger switch (470) for controlling the power supply of the power supply (420).
6. A field optical cable joint fault diagnosis method based on optical fiber coding is applied to the field optical cable joint fault diagnosis system of any one of claims 1 to 5, and is characterized in that: comprises the following steps
Controlling a light source to send a light wave signal;
the light wave signal generates pulse light waves through the first SOA optical switch, the pulse light waves enter the communication optical fiber provided with a plurality of field operation optical cable joints through the circulator, and optical fiber codes are arranged on optical fiber sections in the field operation optical cable joints;
the data acquisition unit generates a physical signal containing position data of the field optical cable joint and the optical fiber code number combination code, and acts on the outer layer of the field optical cable joint at the position of the optical fiber code, so that the optical wave signal returned by the optical fiber code is strained according to a certain rule;
the photoelectric detector is controlled to receive the light wave signal returned by the circulator in the communication optical fiber through the switching time of the second SOA optical switch to generate pulse light waves which are strained according to rules;
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 optical fiber coding number of the field optical cable joint;
recording the position data, the optical fiber code number and the corresponding light wave signal intensity of the field operation optical cable joint as initial field operation optical cable joint information;
and repeating the steps, comparing the field operation optical cable joint information of the subsequent test with the initial field operation optical cable joint information, and judging that the field operation optical cable joint at the position has a fault if the field operation optical cable joint information and the initial field operation optical cable joint information are inconsistent.
7. The field optical cable joint fault diagnosis method based on the optical fiber coding as claimed in claim 6, wherein: when the subsequently tested field operation optical cable joint information is compared with the initial field operation optical cable joint information, if the light wave signal intensity is lower than that of the initial field operation optical cable joint information, the field operation optical cable joint attenuation at the position is judged; and if the information of the field optical cable joint in the subsequent test is not detected, judging that the interruption occurs in front of the field optical cable joint at the position.
8. The field optical cable joint fault diagnosis method based on the optical fiber coding as claimed in claim 6, 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.
9. The field optical cable joint fault diagnosis method based on the optical fiber coding as claimed in claim 6, 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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