CN112311451B - Optical device fault detection method and device - Google Patents
Optical device fault detection method and device Download PDFInfo
- Publication number
- CN112311451B CN112311451B CN201910687555.0A CN201910687555A CN112311451B CN 112311451 B CN112311451 B CN 112311451B CN 201910687555 A CN201910687555 A CN 201910687555A CN 112311451 B CN112311451 B CN 112311451B
- Authority
- CN
- China
- Prior art keywords
- optical
- optical device
- detected
- photoelectric conversion
- sampling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 614
- 238000001514 detection method Methods 0.000 title claims abstract description 78
- 238000005070 sampling Methods 0.000 claims abstract description 112
- 238000006243 chemical reaction Methods 0.000 claims abstract description 80
- 230000005540 biological transmission Effects 0.000 claims description 24
- 230000004927 fusion Effects 0.000 claims 1
- 239000013307 optical fiber Substances 0.000 abstract description 15
- 238000000691 measurement method Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- H04B10/07955—Monitoring or measuring power
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention discloses a fault detection method and device for an optical device, and belongs to the field of optical fiber sensing. The device comprises an optical sampling module and a first photoelectric conversion module. The optical sampling module can acquire an optical signal with a specified proportion in the optical signals output by the optical device to be detected, and the first photoelectric conversion module can determine that the optical device to be detected has faults when the optical power of the sampled light is smaller than a first power threshold value. Compared with the indirect measurement method in the prior art that whether the optical device has faults or not is judged according to the electrical properties of the driving structure of the optical device, the accuracy of the detection result is obviously improved.
Description
Technical Field
The invention relates to the field of optical fiber sensing, in particular to a fault detection method and device for an optical device.
Background
The optical fiber sensing technology can detect physical quantities by detecting changes in parameters such as intensity, phase, frequency, wavelength, polarization, etc. of light waves transmitted in an optical fiber. The optical fiber sensing technology has the advantages of various detection physical quantities, high sensitivity, high measurement speed, low cost and the like, and is widely applied to a plurality of fields.
The optical fiber sensing system to which the optical fiber sensing technology is applied includes at least one optical device, and a method capable of detecting whether the optical device is operating normally is provided in the related art, in which the optical device is detected to be operating normally by measuring an electrical property (e.g., a current magnitude, etc.) of a driving structure of the optical device. For example, whether the light device is operating properly is determined by measuring whether the power supply of the light device is outputting current properly: when current output exists, the optical device is determined to work normally, and when no current output exists, the optical device is determined to not work normally.
However, since the method for detecting whether the optical device can operate normally in the related art relies on measuring the electrical properties of the driving structure of the optical device, the detection result is prone to be inaccurate.
Disclosure of Invention
The invention provides a fault detection method and device for an optical device, which can solve the problem that in the related art, based on the electrical property of a driving structure of the optical device, whether the optical device works normally or not is determined, so that the detection result is inaccurate.
Specifically, the method comprises the following technical scheme:
in a first aspect, an optical device failure detection arrangement is provided, the optical device failure detection arrangement being applied to a light sensing link comprising at least one optical device connected in an optical transmission direction,
The optical device fault detection apparatus includes: the optical sampling module and the first photoelectric conversion module;
The input end of the optical sampling module is configured to be connected with the output end of an optical device to be detected, the optical sampling module is configured to acquire sampling light of the optical device to be detected, the sampling light is an optical signal with a specified proportion in optical signals output by the optical device to be detected, and the optical device to be detected is at least one optical device in the at least one optical device;
The input end of the first photoelectric conversion module is connected with the output end of the optical sampling module, and the first photoelectric conversion module is configured to determine that the optical device to be detected has a fault when the optical power of the sampled light is smaller than a first power threshold, wherein the first power threshold is a minimum power value for ensuring the normal work of the optical device to be detected.
Optionally, the optical device fault detection device includes: an optical switch;
The input end of the optical switch is connected with the output end of the optical sampling module, and the output end of the optical switch is connected with the input end of the first photoelectric conversion module.
Optionally, the at least one optical device comprises N optical devices, each of the N optical devices is an optical device to be detected,
The optical device fault detection device comprises N optical sampling modules, wherein the input ends of the N optical sampling modules are configured to be connected with the output ends of the N optical devices in a one-to-one correspondence manner;
The optical switch is provided with N input ends and 1 output end, the N input ends of the optical switch are configured to be connected with the output ends of the N optical sampling modules in a one-to-one correspondence mode, N is an integer larger than 1, and the 1 output ends of the optical switch are connected with the input ends of the first photoelectric conversion modules.
Optionally, the at least one optical device comprises N optical devices, at least one optical device in the N optical devices is an optical device to be detected,
The optical device fault detection device comprises M optical sampling modules, wherein the optical switch is provided with M input ends and 1 output end, the M input ends of the optical switch are configured to be connected with the output ends of the M optical sampling modules in a one-to-one correspondence manner, N is an integer greater than 1, and M is an integer smaller than or equal to N;
when the optical device to be detected is a first optical device, the first optical device is a first optical device located in the transmission direction of an optical path among the N optical devices, the input end of 1 optical sampling module among the M optical sampling modules is configured to be connected with the output end of the first optical device, the input end of the optical switch is connected with the output end of the optical sampling module, and the output end of the optical switch is connected with the input end of the first photoelectric conversion module;
When the optical device to be detected is a second optical device, the second optical device is an optical device except a first optical device in the N optical devices, the output end of one optical sampling module is connected with the output end of the first optical device, the input end of the other optical sampling module is connected with the input end of the first optical device, the input ends of the optical switches are connected with the output ends of the 2 optical sampling modules, the output ends of the optical switches are respectively connected with the input ends of the first photoelectric conversion modules,
The first photoelectric conversion module is configured to determine that the optical device to be detected has a fault when it is determined that the optical device located before the optical device to be detected in the transmission direction of the optical path has no fault according to the sampled light acquired by the optical sampling module connected with the input end, and the optical power of the sampled light acquired by the optical sampling module connected with the output end is smaller than a first power threshold.
Optionally, each optical device to be detected has a first power threshold, and in the transmission direction of the optical path, the magnitude of the first power threshold of each optical device is reduced in turn.
Optionally, the first photoelectric conversion module includes:
the comparison sub-module is used for comparing the optical power of the sampled light with a first power threshold value;
And the determining submodule is used for determining that the optical device to be detected has faults when the optical power of the sampled light is smaller than the first power threshold value.
Optionally, the alignment sub-module is configured to:
And comparing the optical power of the sampled light with a first power threshold value according to a specified time interval.
Optionally, the optical device fault detection device comprises a second photoelectric conversion module,
The input end of the second photoelectric conversion module is configured to be connected with the last optical device positioned in the optical transmission direction in the optical line sensing link;
The second photoelectric conversion module is configured to acquire an optical signal passing through the last optical device, and when the optical power of the optical signal is smaller than a second power threshold, a control instruction is sent to the optical switch, and the control instruction is used for indicating the optical sampling module to acquire the sampling light of the optical device to be detected.
Optionally, the optical sampling module is an optical splitter.
Optionally, the beam splitter is connected with the optical switch and the optical device to be detected by welding.
In a second aspect, there is provided an optical device failure detection method applied to the optical device failure detection apparatus of the first aspect, the method being applied to an optical line sensing link comprising at least one optical device connected in an optical transmission direction,
Connecting the input end of an optical sampling module in the optical device fault detection device with the output end of an optical device to be detected, wherein the optical device to be detected is at least one optical device in the at least one optical device;
The optical sampling module acquires sampling light of the optical device to be detected, wherein the sampling light is an optical signal with a specified proportion in optical signals output by the optical device to be detected;
When the optical power of the sampled light is smaller than a first power threshold, a first photoelectric conversion module in the optical device fault detection device is determined to determine that the optical device to be detected has faults, and the first power threshold is a minimum power value for ensuring normal work of the optical device to be detected.
Optionally, the optical device fault detection means comprises an optical switch,
Before the first photoelectric conversion module determines that the optical device to be detected has a fault, the method comprises the following steps:
According to a specified time interval, the optical switch controls the first photoelectric conversion module to acquire the sampling light;
And comparing the optical power of the sampled light with a first power threshold.
Optionally, the optical device fault detection device includes an optical switch and a second photoelectric conversion module, and before the first photoelectric conversion module determines that the optical device to be detected has a fault, the method includes:
the optical switch controls the first photoelectric conversion module to acquire sampling light according to a control instruction of the second photoelectric conversion module;
Comparing the optical power of the sampled light with a first power threshold;
The control instruction is an instruction sent by the second photoelectric conversion module to the optical switch when the optical power of the last optical device optical signal in the optical transmission direction in the optical sensing link, which is acquired by the second photoelectric conversion module, is smaller than a second power threshold.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
In the method and the device for detecting the faults of the optical device provided by the embodiment of the invention, the optical sampling module can acquire the optical signals with the specified proportion in the optical signals output by the optical device to be detected, and the first photoelectric conversion module can determine that the optical device to be detected has faults when the optical power of the sampled light is smaller than the first power threshold value. Compared with the indirect measurement method in the prior art that whether the optical device has faults or not is judged according to the electrical properties of the driving structure of the optical device, the accuracy of the detection result is obviously improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an optical device fault detection device according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of another optical device fault detection apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another optical device fault detection device according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of another optical device fault detection device according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another optical device fault detection device according to an embodiment of the present invention;
FIG. 6 is a flowchart of a method for detecting an optical device failure according to an embodiment of the present invention;
FIG. 7 is a flowchart of another method for detecting an optical device failure according to an embodiment of the present invention;
FIG. 8 is a flow chart of yet another method for detecting optical device failure provided by an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an optical device fault detection device according to an embodiment of the present invention.
Detailed Description
In order to make the technical scheme and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
The optical fiber sensing technology has the advantages of various detection physical quantities, high sensitivity, high measurement speed, low cost and the like, and is widely applied to multiple fields of petrochemical industry, electric power, medicine, civil engineering and the like. The monitoring of the working state of each optical device (also called a light passing device) arranged in the light sensing link applying the light sensing technology and the rapid interpretation of faults are necessary means for improving the reliability of the light sensing link. However, due to the characteristics of the optical fiber sensing technology, when the optical fiber sensing link fails, the position of the failure is difficult to judge. In the related art, whether the optical device has a fault is generally judged by measuring the electrical property of a driving structure in the optical device, and the mode belongs to indirect measurement, so that detection errors are easily caused, and the detection result is inaccurate.
The embodiment of the invention provides an optical device fault detection device, which can be applied to an optical sensing link, wherein the optical sensing link comprises at least one optical device connected in the optical transmission direction. As shown in fig. 1, the light transmission direction is a direction x, and the optical device failure detection apparatus includes: the light sampling module 101 and the first photoelectric conversion module 102.
The input end of the optical sampling module 101 is configured to be connected with the output end of the optical device to be detected, the optical sampling module 101 is configured to obtain sampling light of the optical device to be detected, the sampling light is an optical signal with a specified proportion in optical signals output by the optical device to be detected, and the optical device to be detected is at least one optical device in at least one optical device.
The input end of the first photoelectric conversion module 102 is connected with the output end of the optical sampling module 101, the first photoelectric conversion module 102 is a device for detecting sampled light, and is configured to determine that the optical device to be detected has a fault when the optical power of the sampled light is smaller than a first power threshold, and the first power threshold is a minimum power value for ensuring normal operation of the optical device to be detected.
In summary, the optical device fault detection device provided in the embodiment of the present invention includes an optical sampling module and a first photoelectric conversion module, where the optical sampling module is capable of acquiring an optical signal with a specified proportion from optical signals output by an optical device to be detected, and the first photoelectric conversion module is capable of determining that the optical device to be detected has a fault when the optical power of the sampled light is less than a first power threshold. Compared with the indirect measurement method in the prior art that whether the optical device has faults or not is judged according to the electrical properties of the driving structure of the optical device, the accuracy of the detection result is obviously improved.
It should be noted that the optical device shown in fig. 1 may be a light source in the light sensing link, or may be an optical device other than a light source in the light sensing link. When the optical device is a light source, the optical device comprises an output end which is connected with the input end of the optical sampling module; when the optical device is an optical device other than a light source, the optical device may include an input terminal that may be connected to an output terminal of the other optical device and an output terminal that is connected to an input terminal of the optical sampling module.
The first photoelectric conversion module is configured to acquire sampled light and determine an optical power of the sampled light, and determine that a fault exists in the optical device to be detected when the optical power of the sampled light is smaller than a first power threshold. It should be noted that, in an alternative implementation manner, the first photoelectric conversion module is further configured to convert optical power into a corresponding electrical signal, where the first power threshold is also the electrical signal, and determine whether the optical device to be detected has a fault by comparing a magnitude relationship between the electrical signal of the optical power of the sampled light and the electrical signal corresponding to the first power threshold.
Alternatively, as shown in fig. 2, the optical device failure detection apparatus may include: an optical switch 103. An input end of the optical switch 103 is connected to an output end of the optical sampling module 101, and an output end of the optical switch 103 is connected to an input end of the first photoelectric conversion module 102. The optical switch 103 is used for controlling the optical sampling module 102 to obtain the sampled light of the optical device to be detected, and the optical switch 101 can function as a switch. When there are a plurality of optical devices to be detected, the sampled light obtained from each optical device to be detected may be collected at the optical switch, and then transmitted to the first photoelectric conversion module 102, and the first photoelectric conversion module 102 performs fault judgment on the optical device to be detected.
In the optical device fault detection device provided by the embodiment of the invention, the optical device to be detected can be all optical devices in the optical line sensing link, and can also be one or more optical devices in all optical devices in the optical line sensing link, and accordingly, the structure of the optical device fault detection device for detecting whether the optical device to be detected has a fault can be different. The following describes the structure of the optical device failure detection apparatus, taking two cases as examples respectively:
In the first case, as shown in fig. 3, at least one optical device includes N optical devices, each of which is an optical device to be detected.
In this case, the optical device fault detection apparatus includes N optical sampling modules 101, and input ends of the N optical sampling modules 101 are configured to be connected to output ends of the N optical devices in a one-to-one correspondence. The optical switch 103 has N input ends and 1 output end, and the N input ends of the optical switch 103 are connected to the output ends of the N optical sampling modules 101 in a one-to-one correspondence. The 1 output terminals of the optical switch 103 are connected to the input terminals of the first photoelectric conversion module 102. N is an integer greater than 1, in the case shown in fig. 3, N is 3. That is, 3 optical devices are disposed in the optical line sensing link and are all optical devices to be detected, the optical device fault detection device includes 3 optical sampling modules 101, and an optical switch 103 in the optical device fault detection device has 3 input ends and 1 output end.
In the second case, the at least one optical device includes N optical devices, and not each optical device of the N optical devices is an optical device to be detected, but one or less than N integers is an optical device to be detected.
In this case, the optical device fault detection apparatus includes M optical sampling modules 101, where the optical switch 103 has M input ends and 1 output end, the M input ends of the optical switch 103 are connected in one-to-one correspondence with the output ends of the M optical sampling modules 101, N is an integer greater than 1, and M is an integer less than or equal to N.
In the second case, according to the positions of the optical devices to be detected in the optical line sensing link, the number of the optical sampling modules 101 correspondingly set may be different, and the following two cases, that is, the first optical device and the non-first optical device, of the optical devices to be detected in the transmission direction of the optical path are taken as examples for illustration:
When the optical device to be detected is a first optical device, the first optical device is the first optical device located in the transmission direction of the optical path among the N optical devices. Referring to fig. 2, the input terminal of 1 optical sampling module 101 of the m optical sampling modules 101 is configured to be connected to the output terminal of the first optical device, the input terminal of the optical switch 103 is connected to the output terminal of the optical sampling module 101, and the output terminal of the optical switch 103 is connected to the input terminal of the first photoelectric conversion module 102.
When the optical device to be detected is a second optical device, the second optical device is an optical device except the first optical device in the N optical devices, among 2 optical sampling modules 101 in the M optical sampling modules 101, an output end of one optical sampling module 101 is connected with an output end of the first optical device, an input end of the other optical sampling module 101 is connected with an input end of the first optical device, input ends of the optical switches 103 are all connected with output ends of the 2 optical sampling modules 101, and output ends of the optical switches 103 are respectively connected with input ends of the first photoelectric conversion modules 102. As shown in fig. 4, the optical device to be detected is provided with optical sampling modules 101 on both sides in the transmission direction x of the optical path, and both the optical sampling modules 101 are connected with a first photoelectric conversion module 102 through an optical switch 103.
In this case, the first photoelectric conversion module 102 is configured to determine that the optical device to be detected has a fault when it is determined that the optical device located before the optical device to be detected in the transmission direction of the optical path has no fault based on the sampled light acquired by the optical sampling module 101 connected to the input end, and the optical power of the sampled light acquired by the optical sampling module 101 connected to the output end is smaller than the first power threshold. The determining process can be implemented by a logic circuit, and in the judging conditions, it is determined that the optical device located before the optical device to be detected in the transmission direction of the optical path has no fault, and the two conditions that the optical power of the sampled light obtained by the optical sampling module 101 connected with the output end is smaller than the first power threshold are in an and relationship, and when the judging results of the two conditions are True, it is determined that the optical device to be detected has a fault.
Optionally, each optical device to be detected has a first power threshold, and the first power threshold of each optical device to be detected may be the same or different. Considering that the optical signal has loss in the transmission process of the optical path when the embodiment of the invention is actually applied, the first power threshold value of each optical device can be set to be reduced in sequence in the transmission direction of the optical path. The first power threshold value of each optical device may be adjusted according to the service life and the breakage rate of the optical device.
Optionally, the first photoelectric conversion module 102 includes: the sub-modules are compared and the sub-modules are determined. The comparing submodule is configured to compare the optical power of the sampled light with a first power threshold, and optionally, the comparing submodule may include a comparator (english: comparator) configured to compare the optical power of the sampled light with the first power threshold, and when the optical power of the sampled light is smaller than the first power threshold, the comparator may send a trigger signal to the determining submodule. The determining submodule is used for determining that the optical device to be detected has faults when the optical power of the sampled light is smaller than a first power threshold value, and optionally, the determining submodule can be realized through an alarm, and after receiving a trigger signal sent by the comparator, the determining submodule determines that the optical device to be detected has faults in an alarm mode.
Alternatively, the alignment sub-module may be configured to: the comparing sub-module may include a comparator and a timer for timing and sending a prompt signal to the comparator every time the specified time interval is reached, the comparator being configured to compare the optical power of the sampled light with the first power threshold after receiving the prompt signal. This allows the device fault detection means to automatically detect at regular intervals, for example 10 minutes, the timer sending a prompt signal to the comparator every time it counts to 10 minutes.
Optionally, as shown in fig. 5, the optical device fault detection apparatus includes a second photoelectric conversion module 104, where an input end of the second photoelectric conversion module 104 is configured to be connected to a last optical device located in the optical transmission direction in the optical line sensing link. The second photoelectric conversion module 104 may be configured to acquire an optical signal passing through the last optical device and determine an optical power of the optical signal, and when the optical power of the optical signal is less than a second power threshold, send a control instruction to the optical switch 103, where the control instruction is used to instruct the optical sampling module 101 to acquire sampled light of the optical device to be detected. The second power threshold is a minimum power value that ensures that the last optical device can operate properly. Alternatively, the second photoelectric conversion module may include a comparator configured to issue a control instruction to the optical switch 103 when the optical power of the optical signal is smaller than the second power threshold.
Since the second photoelectric conversion module 104 may be connected to the last optical device in the optical transmission direction in the optical sensing link, the optical signal input to the second photoelectric conversion module 104 is an optical signal passing through the optical sensing link, by comparing the optical power of the optical signal with the second power threshold, it may be determined whether the optical sensing link has a fault, and when it is determined that the optical sensing link has a fault, the optical switch 103 controls the optical sampling module 102 to obtain the sampled light of the optical device to be detected. Therefore, the detection efficiency and the effectiveness of the optical device fault detection device can be improved.
Fig. 5 shows the first case shown in fig. 3, where all optical devices in the optical line sensing link are optical devices to be detected, and of course, in other alternative implementations, the principle of detecting whether the optical devices to be detected have a fault may be referred to the foregoing description, and embodiments of the present invention are not repeated herein.
Alternatively, the optical sampling module 101 may be an optical splitter. The splitter may be a 1*2 coupler, i.e. having two outputs. The optical splitter may be a1 to 99 optical splitter, that is, the optical splitting ratio of the two output ends is 1 to 99, and one hundred percent of the optical signals passing through the optical device to be detected can be used for fault detection of the optical device, and ninety-nine percent of the optical signals can be transmitted along the original optical path.
Alternatively, the beam splitter may be connected to the optical switch 103 and the optical device to be detected by welding. Of course, in other alternative embodiments, the optical splitter may be connected to the optical switch 103 and the optical device to be detected by connectors.
In summary, the optical device fault detection device provided in the embodiment of the present invention includes an optical sampling module and a first photoelectric conversion module, where the optical sampling module is capable of acquiring an optical signal with a specified proportion from optical signals output by an optical device to be detected, and the first photoelectric conversion module is capable of determining that the optical device to be detected has a fault when the optical power of the sampled light is less than a first power threshold. Compared with the indirect measurement method in the prior art that whether the optical device has faults or not is judged according to the electrical properties of the driving structure of the optical device, the accuracy of the detection result is obviously improved.
The embodiment of the invention also provides an optical device fault detection device, which can be applied to the optical device fault detection device shown in fig. 1, as shown in fig. 6, and the method comprises the following steps:
Step 201, an input end of an optical sampling module in the optical device fault detection device is connected with an output end of an optical device to be detected.
Wherein the optical device to be detected is at least one optical device of the at least one optical device.
Step 202, an optical sampling module acquires sampling light of an optical device to be detected, wherein the sampling light is an optical signal with a specified proportion in optical signals output by the optical device to be detected.
And 203, when the optical power of the sampled light is smaller than a first power threshold, the first photoelectric conversion module determines that the optical device to be detected has a fault, and the first power threshold is a minimum power value for ensuring the normal operation of the optical device to be detected.
In summary, according to the optical device fault detection method provided by the embodiment of the present invention, the optical sampling module may obtain an optical signal with a specified proportion from the optical signals output by the optical device to be detected, and the first photoelectric conversion module may determine that the optical device to be detected has a fault when the optical power of the sampled light is less than the first power threshold. Compared with the indirect measurement method in the prior art that whether the optical device has faults or not is judged according to the electrical properties of the driving structure of the optical device, the accuracy of the detection result is obviously improved.
Optionally, the optical device fault detection apparatus includes an optical switch, and fig. 7 shows another optical device fault detection method provided by an embodiment of the present invention, where the method includes:
Step 301, connecting an input end of an optical sampling module in the optical device fault detection device with an output end of an optical device to be detected.
Wherein the optical device to be detected is at least one optical device of the at least one optical device.
Step 302, an optical sampling module acquires sampling light of an optical device to be detected, wherein the sampling light is an optical signal with a specified proportion in optical signals output by the optical device to be detected.
Step 303, controlling the first photoelectric conversion module to obtain sampling light by the optical switch according to a specified time interval.
Step 304, comparing the optical power of the sampled light with a first power threshold.
And 305, when the optical power of the sampled light is smaller than a first power threshold, the first photoelectric conversion module determines that the optical device to be detected has a fault, and the first power threshold is a minimum power value for ensuring the normal operation of the optical device to be detected.
In summary, in the optical device fault detection method provided by the embodiment of the present invention, the optical sampling module may obtain an optical signal with a specified proportion from the optical signals output by the optical device to be detected, and the optical switch may control the first photoelectric conversion module to obtain the sampled light based on the specified time interval, so that the first photoelectric conversion module may determine that the optical device to be detected has a fault when the optical power of the sampled light is less than the first power threshold. Compared with the indirect measurement method in the prior art that whether the optical device has faults or not is judged according to the electrical properties of the driving structure of the optical device, the accuracy of the detection result is obviously improved. And the first photoelectric conversion module acquires the sampling light according to the specified time interval to detect, so that the processing resource of the first photoelectric conversion module is saved.
Optionally, the optical device fault detection apparatus includes an optical switch and a second photoelectric conversion module, and fig. 8 shows another optical device fault detection method provided by an embodiment of the present invention, where the method includes:
step 401, an input end of an optical sampling module in the optical device fault detection device is connected with an output end of an optical device to be detected.
Wherein the optical device to be detected is at least one optical device of the at least one optical device.
Step 402, the optical sampling module acquires sampling light of the optical device to be detected, wherein the sampling light is an optical signal with a specified proportion in optical signals output by the optical device to be detected.
And step 403, the optical switch controls the first photoelectric conversion module to acquire sampling light according to the control instruction of the second photoelectric conversion module.
The control instruction is an instruction sent by the second photoelectric conversion module to the optical switch when the optical power of the optical signal of the last optical device in the optical transmission direction in the optical sensing link, which is acquired by the second photoelectric conversion module, is smaller than a second power threshold.
Step 404, comparing the optical power of the sampled light with a first power threshold.
And step 405, when the optical power of the sampled light is smaller than a first power threshold, the first photoelectric conversion module determines that the optical device to be detected has a fault, and the first power threshold is a minimum power value for ensuring the normal operation of the optical device to be detected.
In summary, according to the optical device fault detection method provided by the embodiment of the invention, the optical sampling module can obtain an optical signal with a specified proportion in the optical signal output by the optical device to be detected, and the optical switch can control the first photoelectric conversion module to obtain the sampling light according to the control instruction of the second photoelectric conversion module, so that the first photoelectric conversion module can determine that the optical device to be detected has a fault when the optical power of the sampling light is smaller than the first power threshold. Compared with the indirect measurement method in the prior art that whether the optical device has faults or not is judged according to the electrical properties of the driving structure of the optical device, the accuracy of the detection result is obviously improved. And because the first photoelectric conversion module is detected based on the control instruction of the second photoelectric conversion module, the processing resource of the first photoelectric conversion module is saved, and the reliability of the fault detection method of the optical device is enhanced. Once the fault is detected in the optical fiber sensing link, the first optical device to be detected can be taken as a starting point, and the optical fiber sensing link can be sequentially and backwards detected along the optical path until the first optical device to be detected with the fault is detected.
Fig. 9 shows a schematic diagram of another optical fiber sensing link and an optical device fault detection device applied to the optical fiber sensing link, where the optical fiber sensing link includes 4 optical devices to be detected, and a circulator 001, where 1 optical device to be detected of the 4 optical devices to be detected is disposed in a light return portion of an optical path through the circulator 001, and the remaining 3 optical devices to be detected are disposed in a light outlet portion of the optical path.
The foregoing description is only for the convenience of those skilled in the art to understand the technical solution of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. An optical device failure detection apparatus, characterized in that the optical device failure detection apparatus is applied to an optical line sensor link including at least one optical device connected in an optical transmission direction,
The optical device fault detection apparatus includes: the optical sampling module, the first photoelectric conversion module and the optical switch;
The input end of the optical sampling module is configured to be connected with the output end of an optical device to be detected, the optical sampling module is configured to acquire sampling light of the optical device to be detected, the sampling light is an optical signal with a specified proportion in optical signals output by the optical device to be detected, and the optical device to be detected is at least one optical device in the at least one optical device;
The input end of the first photoelectric conversion module is connected with the output end of the optical sampling module, and the first photoelectric conversion module is configured to determine that the optical device to be detected has a fault when the optical power of the sampled light is smaller than a first power threshold, wherein the first power threshold is a minimum power value for ensuring the normal operation of the optical device to be detected;
The input end of the optical switch is connected with the output end of the optical sampling module, and the output end of the optical switch is connected with the input end of the first photoelectric conversion module;
the at least one optical device comprises N optical devices, each optical device in the N optical devices is an optical device to be detected, wherein each optical device to be detected is provided with a first power threshold, and the size of the first power threshold of each optical device is sequentially reduced in the transmission direction of an optical path;
The optical device fault detection device comprises N optical sampling modules, wherein the input ends of the N optical sampling modules are configured to be connected with the output ends of the N optical devices in a one-to-one correspondence manner;
the optical switch is provided with N input ends and 1 output end, the N input ends of the optical switch are configured to be connected with the output ends of the N optical sampling modules in a one-to-one correspondence mode, N is an integer larger than 1, and the 1 output ends of the optical switch are connected with the input ends of the first photoelectric conversion modules;
the at least one optical device comprises N optical devices, and at least one optical device in the N optical devices is an optical device to be detected;
The optical device fault detection device comprises M optical sampling modules, wherein the optical switch is provided with M input ends and 1 output end, the M input ends of the optical switch are configured to be connected with the output ends of the M optical sampling modules in a one-to-one correspondence manner, N is an integer greater than 1, and M is an integer smaller than or equal to N;
when the optical device to be detected is a first optical device, the first optical device is a first optical device located in the transmission direction of an optical path among the N optical devices, the input end of 1 optical sampling module among the M optical sampling modules is configured to be connected with the output end of the first optical device, the input end of the optical switch is connected with the output end of the optical sampling module, and the output end of the optical switch is connected with the input end of the first photoelectric conversion module;
When the optical device to be detected is a second optical device, the second optical device is an optical device except for a first optical device in the N optical devices, the output end of one optical sampling module is connected with the output end of the first optical device, the input end of the other optical sampling module is connected with the input end of the first optical device, the input ends of the optical switches are connected with the output ends of the 2 optical sampling modules, and the output ends of the optical switches are respectively connected with the input ends of the first photoelectric conversion modules;
the first photoelectric conversion module is configured to determine that the optical device to be detected has a fault when it is determined that the optical device located before the optical device to be detected in the transmission direction of the optical path has no fault according to the sampled light acquired by the optical sampling module connected with the input end, and the optical power of the sampled light acquired by the optical sampling module connected with the output end is smaller than a first power threshold;
The first photoelectric conversion module comprises a comparison submodule and a determination submodule, wherein the comparison submodule is used for comparing the optical power of the sampled light with a first power threshold value; and the determining submodule is used for determining that the optical device to be detected has faults when the optical power of the sampled light is smaller than the first power threshold value.
2. The optical device fault detection apparatus of claim 1, wherein the alignment sub-module is configured to:
And comparing the optical power of the sampled light with a first power threshold value according to a specified time interval.
3. The optical device failure detection apparatus according to claim 1, wherein the optical device failure detection apparatus includes a second photoelectric conversion module,
The input end of the second photoelectric conversion module is configured to be connected with the last optical device positioned in the optical transmission direction in the optical line sensing link;
The second photoelectric conversion module is configured to acquire an optical signal passing through the last optical device, and when the optical power of the optical signal is smaller than a second power threshold, a control instruction is sent to the optical switch, and the control instruction is used for indicating the optical sampling module to acquire the sampling light of the optical device to be detected.
4. The optical device fault detection apparatus of claim 1, wherein the optical sampling module is an optical splitter.
5. The optical device failure detection apparatus according to claim 4, wherein the optical splitter is connected to the optical switch and the optical device to be detected by fusion bonding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910687555.0A CN112311451B (en) | 2019-07-29 | 2019-07-29 | Optical device fault detection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910687555.0A CN112311451B (en) | 2019-07-29 | 2019-07-29 | Optical device fault detection method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112311451A CN112311451A (en) | 2021-02-02 |
| CN112311451B true CN112311451B (en) | 2024-06-25 |
Family
ID=74329451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910687555.0A Active CN112311451B (en) | 2019-07-29 | 2019-07-29 | Optical device fault detection method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112311451B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114679220A (en) * | 2022-03-23 | 2022-06-28 | 国网湖南省电力有限公司 | Optical path performance analysis method and analysis system for power optical transmission system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210297703U (en) * | 2019-07-29 | 2020-04-10 | 中国石油天然气集团有限公司 | Optical device fault detection device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103312411B (en) * | 2013-05-30 | 2016-08-10 | 华为数字技术（成都）有限公司 | Optical fiber link fault detection method and device |
| CN104518826B (en) * | 2013-09-30 | 2017-10-24 | 华为技术有限公司 | A kind of method, equipment and system for monitoring fiber failure |
| CN107294599A (en) * | 2016-04-12 | 2017-10-24 | 中兴通讯股份有限公司 | A kind of light path diagnostic method and device |
| CN105978620A (en) * | 2016-05-30 | 2016-09-28 | 南京中新赛克科技有限责任公司 | Protection device and protection method for optical signal transmission line |
-
2019
- 2019-07-29 CN CN201910687555.0A patent/CN112311451B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210297703U (en) * | 2019-07-29 | 2020-04-10 | 中国石油天然气集团有限公司 | Optical device fault detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112311451A (en) | 2021-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103048116A (en) | Method and device for performing in-place detection on optical fiber as well as microcontroller | |
| CN112311451B (en) | Optical device fault detection method and device | |
| CN109444796B (en) | Optical path state monitoring system of optical fiber current sensor | |
| CN106872849B (en) | Equipment internal IO sampling method, device and system | |
| KR20160064451A (en) | A Photovoltaic Modular Abnormal Condition Effective Diagnosis System and Method thereof | |
| CN210297703U (en) | Optical device fault detection device | |
| CN110888053A (en) | Relay detection device, detection system and detection method | |
| CN109031048B (en) | Fault positioning system and method based on fiber bragg grating current sensor | |
| CN114485927A (en) | Thyristor trigger signal light intensity on-line monitoring device and valve control system adopting same | |
| CN105510730A (en) | Testing apparatus and method for reverse recovery protection unit (RPU) of converter valve | |
| CN212514982U (en) | Optical path state monitoring system of optical fiber current sensor | |
| CN109672155A (en) | A kind of fault electric arc acquisition breaker | |
| JPH0511269B2 (en) | ||
| RU201607U1 (en) | Arc protection device | |
| EP4102540A1 (en) | Mass spectrometer and mass spectrometry method | |
| CN110514413B (en) | Rapid detection system for broken optical fiber of optical fiber fence | |
| CN107132390A (en) | For the equipment for the defect for detecting electic power system | |
| KR102538989B1 (en) | Apparatus and method for checking whether or not a contactor provided in an ESS is fused | |
| CN220188647U (en) | Arc light detection device | |
| CN111323690A (en) | Test method of multi-channel pulse input circuit of power acquisition terminal | |
| SU1285411A1 (en) | Device for checking generators | |
| CN216411894U (en) | Fault self-diagnosis self-recovery vibrating wire monitoring system | |
| KR102255625B1 (en) | Apparatus and method for detecting power generation equipments | |
| CN110662331A (en) | Intelligent filament current and filament voltage digital sensor for rail transit | |
| CN105319483A (en) | Electrical wire harness earth fault point location determining device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |