CN112311451A - Optical device fault detection method and device - Google Patents
Optical device fault detection method and device Download PDFInfo
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- CN112311451A CN112311451A CN201910687555.0A CN201910687555A CN112311451A CN 112311451 A CN112311451 A CN 112311451A CN 201910687555 A CN201910687555 A CN 201910687555A CN 112311451 A CN112311451 A CN 112311451A
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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
- H04B10/07955—Monitoring or measuring power
Abstract
The invention discloses a method and a device for detecting faults of an optical device, and belongs to the field of optical fiber sensing. The device comprises a light sampling module and a first photoelectric conversion module. The optical sampling module can acquire optical signals of a specified proportion in 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 a fault when the optical power of the sampling light is smaller than a first power threshold value. Compared with the indirect measurement method of judging whether the optical device has faults or not according to the electrical property of the driving structure of the optical device in the prior art, the method can obviously improve the accuracy of the detection result.
Description
Technical Field
The invention relates to the field of optical fiber sensing, in particular to a method and a device for detecting faults of an optical device.
Background
The optical fiber sensing technology can detect physical quantities by detecting changes in parameters such as intensity, phase, frequency, wavelength, and polarization of light waves transmitted through an optical fiber. The optical fiber sensing technology has the advantages of various detected physical quantities, high sensitivity, high measuring speed, low cost and the like, and is widely applied to multiple fields.
An optical fiber sensing system applied to an optical fiber sensing technology 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 whether the optical device is operating normally is detected by measuring an electrical property (e.g., a current magnitude, etc.) of a driving structure of the optical device. For example, whether the optical device normally operates is determined by measuring whether the power supply of the optical device normally outputs current: when current is output, the optical device is determined to work normally, and when no current is output, the optical device is determined to be incapable of working normally.
However, since the method for detecting whether the optical device can normally operate in the related art depends on the electrical property of the driving structure of the optical device, it is easy to cause the detection result to be inaccurate.
Disclosure of Invention
The invention provides a method and a device for detecting faults of an optical device, which can solve the problem that in the related art, the detection result is inaccurate because whether the optical device normally works is determined based on the electrical property of a driving structure of the optical device.
Specifically, the method comprises the following technical scheme:
in a first aspect, an optical device failure detection apparatus is provided, which is applied to a light sensing link including at least one optical device connected in an optical transmission direction,
the optical device failure detection apparatus includes: the photoelectric conversion module comprises a light sampling module and a 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 an optical signal 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, 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, and the first power threshold is a minimum power value for ensuring that the optical device to be detected normally operates.
Optionally, the optical device fault detection apparatus 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 includes 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 in one-to-one correspondence with the output ends of the N optical sampling modules, N is an integer larger than 1, and 1 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 includes N optical devices, at least one optical device of the N optical devices is an optical device to be detected,
the optical device fault detection device comprises M optical sampling modules, wherein an 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 mode, N is an integer larger 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 a transmission direction of an optical path in the N optical devices, input ends of 1 optical sampling module in the M optical sampling modules are configured to be connected with an output end of the first optical device, an input end of the optical switch is connected with an output end of the optical sampling module, and an output end of the optical switch is connected with an 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 other than the first optical device among the N optical devices, an output end of one optical sampling module is connected with an output end of the first optical device, an input end of another optical sampling module is connected with an input end of the first optical device, input ends of optical switches are connected with output ends of the 2 optical sampling modules, and output ends of the optical switches are respectively connected with 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 the optical device located before the optical device to be detected in the transmission direction of the optical path is determined to be fault-free according to the sampling light obtained by the optical sampling module connected to the input end, and the optical power of the sampling light obtained by the optical sampling module connected to the output end is smaller than a first power threshold.
Optionally, each optical device to be detected has a first power threshold, and the first power threshold of each optical device decreases in sequence in the transmission direction of the optical path.
Optionally, the first photoelectric conversion module includes:
the comparison submodule is used for comparing the optical power of the sampling light with a first power threshold;
and the determining submodule is used for determining 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.
Optionally, the alignment submodule is configured to:
and comparing the optical power of the sampling light with a first power threshold value according to a specified time interval.
Optionally, 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 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, send a control instruction to the optical switch, where the control instruction is used to instruct the optical sampling module to acquire the sampling light of the optical device to be detected.
Optionally, the light sampling module is a light splitter.
Optionally, the optical splitter is connected to 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 is applied to an optical line sensor link including at least one optical device connected in an optical transmission direction,
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 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;
and when the optical power of the sampling light is smaller than a first power threshold, determining that the optical device to be detected has a fault by using a first photoelectric conversion module in the optical device fault detection device, wherein the first power threshold is a minimum power value for ensuring the normal operation of the optical device to be detected.
Optionally, the optical device failure detection apparatus 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 obtain the sampling light;
and comparing the optical power of the sampling light with a first power threshold value.
Optionally, the optical device fault detection apparatus includes an optical switch and a second photoelectric conversion module, 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 sampling light with a first power threshold;
the control instruction is an instruction which is obtained by the second photoelectric conversion module and is sent to the optical switch by the second photoelectric conversion module when the optical power of the optical signal passing through the last optical device in the optical transmission direction in the optical sensing link 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 apparatus for detecting a fault of an optical device provided in the embodiments of the present invention, an optical sampling module can obtain an optical signal of a specified proportion in an optical signal output by an optical device to be detected, and a first photoelectric conversion module can determine that the optical device to be detected has a fault when an optical power of a sampling light is smaller than a first power threshold. Compared with the indirect measurement method of judging whether the optical device has faults or not according to the electrical property of the driving structure of the optical device in the prior art, the method can obviously improve the accuracy of the detection result.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an optical device fault detection apparatus provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another optical device failure detection apparatus provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another optical device failure detection apparatus provided in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another optical device failure detection apparatus provided in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another optical device failure detection apparatus provided in an embodiment of the present invention;
fig. 6 is a flowchart of a method for detecting a failure of an optical device according to an embodiment of the present invention;
FIG. 7 is a flow chart of another method for detecting faults in an optical device according to an embodiment of the present invention;
FIG. 8 is a flow chart of yet another method for detecting faults in an optical device according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an optical device failure detection apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present invention in further detail with reference to the accompanying drawings.
The optical fiber sensing technology has many advantages such as various physical quantity detection, high sensitivity, fast measurement speed and low cost, and is widely applied to various fields such as petrochemical industry, electric power, medicine, civil engineering and the like. The monitoring of the working state of each optical device (also called light passing device) arranged in the light sensing link applying the light sensing technology and the rapid fault interpretation 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, it is difficult to determine the location of the failure. In the related art, whether the optical device has a fault is usually judged by measuring the electrical property of a driving structure in the optical device, and the method belongs to indirect measurement, which is easy to cause detection errors and cause inaccurate detection results.
The embodiment of the invention provides an optical device fault detection device which can be applied to a light sensing link, wherein the light sensing link comprises at least one optical device connected in a light transmission direction. As shown in fig. 1, the optical transmission direction is a direction x, and the optical device failure detection apparatus includes: an optical sampling module 101 and a 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 to 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, where the first power threshold is a minimum power value for ensuring that the optical device to be detected normally operates.
In summary, the optical device fault detection apparatus provided in the embodiment of the present invention includes an optical sampling module and a first photoelectric conversion module, where the optical sampling module can obtain an optical signal of a specified proportion in an optical signal output by an optical device to be detected, and the first photoelectric conversion module can determine that the optical device to be detected has a fault when an optical power of a sampled light is smaller than a first power threshold. Compared with the indirect measurement method of judging whether the optical device has faults or not according to the electrical property of the driving structure of the optical device in the prior art, the method can obviously improve the accuracy of the detection result.
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 the light source in the light sensing link. When the optical device is a light source, the optical device comprises an output end, and the output end 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 another 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 sampling light and determine optical power of the sampling light, and when the optical power of the sampling light is smaller than a first power threshold, determine that the optical device to be detected has a fault. It should be noted that, in an optional implementation manner, the first photoelectric conversion module is further configured to convert the optical power into a corresponding electrical signal, where the first power threshold is also an 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 sampling 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. The input end of the optical switch 103 is connected to the output end of the optical sampling module 101, and the output end of the optical switch 103 is connected to the input end of the first photoelectric conversion module 102. The optical switch 103 is used to control the optical sampling module 102 to obtain the sampling light of the optical device to be detected, and the optical switch 101 can function as a switch. When there are multiple optical devices to be detected, the sampling light obtained from each optical device to be detected can be collected to 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 apparatus provided in the embodiment of the present invention, the optical devices to be detected may be all optical devices in the light sensing link, or may be one or more optical devices in all optical devices in the light sensing link, and accordingly, the structures of the optical device fault detection apparatus for detecting whether a fault exists in the optical devices to be detected may be different. The following describes the structure of the optical device failure detection apparatus with two cases as examples:
in a first case, as shown in fig. 3, the at least one optical device includes N optical devices, and each of the N optical devices is an optical device to be detected.
In this case, the optical device failure 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 terminals and 1 output terminal, and the N input terminals of the optical switch 103 are connected to the output terminals of the N optical sampling modules 101 in a one-to-one correspondence manner. 1 output terminal of the optical switch 103 is connected to an input terminal of the first photoelectric conversion module 102. N is an integer greater than 1, and in the case shown in fig. 3, N is 3. That is, 3 optical devices are arranged in the light sensing link and are all to-be-detected optical devices, the optical device fault detection device comprises 3 optical sampling modules 101, and an optical switch 103 in the optical device fault detection device is provided with 3 input ends and 1 output end.
In a second case, the at least one optical device includes N optical devices, and not every optical device in the N optical devices is an optical device to be detected, but one or less than N integers of the optical devices are the optical devices to be detected.
In this case, the optical device fault detection apparatus includes M optical sampling modules 101, the optical switch 103 has M input terminals and 1 output terminal, the M input terminals of the optical switch 103 are connected to the output terminals of the M optical sampling modules 101 in a one-to-one correspondence, N is an integer greater than 1, and M is an integer less than or equal to N.
In the second case, the number of the correspondingly arranged optical sampling modules 101 may be different according to the different positions of the optical device to be detected in the light sensing link, and the following two cases, that is, the optical device to be detected is the first optical device and the non-first optical device in the transmission direction of the optical path, are taken as an example for explanation:
when the optical device to be detected is the 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 terminals of 1 optical sampling module 101 of the M optical sampling modules 101 are configured to be connected with the output terminal of the first optical device, the input terminal of the optical switch 103 is connected with the output terminal of the optical sampling module 101, and the output terminal of the optical switch 103 is connected with 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 for the first optical device among the N optical devices, in 2 optical sampling modules 101 among the M optical sampling modules 101, the output end of one optical sampling module 101 is connected with the output end of the first optical device, the input end of another optical sampling module 101 is connected with the input end of the first optical device, the input ends of the optical switches 103 are connected with the output ends of the 2 optical sampling modules 101, and the output ends of the optical switches 103 are connected with the input ends of the first photoelectric conversion modules 102 respectively. As shown in fig. 4, the optical device to be detected is provided with optical sampling modules 101 on both sides of the optical path in the transmission direction x, and both optical sampling modules 101 are connected to the first photoelectric conversion module 102 through optical switches 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 is fault-free according to the sampling light obtained by the optical sampling module 101 connected to the input terminal, and the optical power of the sampling light obtained by the optical sampling module 101 connected to the output terminal is smaller than the first power threshold. The determination process can be realized by a logic circuit, in the judgment conditions, the two conditions that the optical device positioned in front of the optical device to be detected in the transmission direction of the optical path has no fault and the optical power of the sampling light acquired by the optical sampling module 101 connected with the output end is smaller than the first power threshold value are in an and relation, and when the judgment results of the two conditions are "True", the optical device to be detected is determined to have a fault.
Optionally, each optical device to be detected has a first power threshold, and the first power thresholds of the optical devices to be detected may be the same or different. In consideration of the fact that the embodiment of the present invention is actually applied, the optical signal has loss during the transmission process of the optical path, and therefore, the size of the first power threshold of each optical device can be set to be decreased sequentially in the transmission direction of the optical path. The first power threshold of each optical device may be adjusted according to the lifetime and the breakage rate of the optical device.
Optionally, the first photoelectric conversion module 102 includes: a comparison submodule and a determination submodule. Optionally, the comparison sub-module may include a comparator configured to compare the optical power of the sampling light with the first power threshold, and when the optical power of the sampling light is smaller than the first power threshold, the comparator may send a trigger signal to the determination sub-module. The determining submodule is configured to 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, and optionally, the determining submodule may be implemented by an alarm, and determine that the optical device to be detected has a fault in an alarm manner after receiving the trigger signal sent by the comparator.
Optionally, the ratio sub-module may be configured to: the optical power of the sampling light is compared with the first power threshold value according to the specified time interval, the comparison submodule can comprise a comparator and a timer, the timer is used for timing and sending a prompt signal to the comparator when the specified time interval is reached, and the comparator is configured to compare the optical power of the sampling light with the first power threshold value after the prompt signal is received. This allows the light failure detection means to automatically detect the light failure at regular intervals, for example, the specified time interval may be 10 minutes, and the timer sends a prompt signal to the comparator every 10 minutes.
Optionally, as shown in fig. 5, the optical device failure detection apparatus includes a second photoelectric conversion module 104, and 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 optical power of the optical signal, and when the optical power of the optical signal is smaller 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 sampling 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. Optionally, 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 less than the second power threshold.
Since the second photoelectric conversion module 104 can be connected to the last optical device in the light sensing link in the optical transmission direction, the optical signal input to the second photoelectric conversion module 104 is an optical signal passing through the light sensing link, and by comparing the optical power of the optical signal with the second power threshold, it can be determined whether the light sensing link has a fault, and when it is determined that the light sensing link has a fault, the optical switch 103 controls the optical sampling module 102 to obtain the sampling light of the optical device to be detected. Therefore, the detection efficiency and effectiveness of the optical device fault detection device can be improved.
Fig. 5 shows a case where all optical devices in the optical line sensing link are to-be-detected optical devices in the first case shown in fig. 3, and certainly, in other optional implementation manners, the second case is also applicable to a case where not all optical devices are to-be-detected optical devices in the second case, and the principle of detecting whether the to-be-detected optical devices have a fault may refer to the foregoing description, and the embodiment of the present invention is not described herein again.
Optionally, the optical sampling module 101 may be an optical splitter. The splitter may be a 1 x 2 coupler, i.e. having two outputs. This optical splitter can be 1 to 99 optical splitter, and the beam split ratio of two output ends is 1 to 99 promptly, can be with in the light signal through waiting to detect the optical device, one hundredth light signal is used for the fault detection of optical device, and the light signal of nineteen hundredths transmits along former light path.
Optionally, the optical splitter, the optical switch 103 and the optical device to be detected may be connected by welding. Of course, in other alternative embodiments, the optical splitter and the optical switch 103 and the optical device to be detected may be connected by a connector.
In summary, the optical device fault detection apparatus provided in the embodiment of the present invention includes an optical sampling module and a first photoelectric conversion module, where the optical sampling module can obtain an optical signal of a specified proportion in an optical signal output by an optical device to be detected, and the first photoelectric conversion module can determine that the optical device to be detected has a fault when an optical power of a sampled light is smaller than a first power threshold. Compared with the indirect measurement method of judging whether the optical device has faults or not according to the electrical property of the driving structure of the optical device in the prior art, the method can obviously improve the accuracy of the detection result.
An embodiment of the present invention further provides an optical device fault detection apparatus, which can be applied to the optical device fault detection apparatus shown in fig. 1, and as shown in fig. 6, the method includes:
Wherein the optical device to be detected is at least one optical device of the at least one optical device.
In summary, in the method for detecting a fault of an optical device provided in the embodiment of the present invention, the optical sampling module can obtain an optical signal of a specified ratio in the optical signal output by the optical device to be detected, and 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 of judging whether the optical device has faults or not according to the electrical property of the driving structure of the optical device in the prior art, the method can obviously improve the accuracy of the detection result.
Optionally, the optical device fault detection apparatus includes an optical switch, and fig. 7 illustrates another optical device fault detection method provided in an embodiment of the present invention, where the method includes:
Wherein the optical device to be detected is at least one optical device of the at least one optical device.
In summary, in the method for detecting a failure of an optical device provided in the embodiments of the present invention, the optical sampling module can obtain an optical signal in a specified ratio 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 based on a specified time interval, so that the first photoelectric conversion module can determine that the optical device to be detected has a failure when the optical power of the sampling light is smaller than the first power threshold. Compared with the indirect measurement method of judging whether the optical device has faults or not according to the electrical property of the driving structure of the optical device in the prior art, the method can obviously improve the accuracy of the detection result. And because the first photoelectric conversion module acquires the sampling light according to the specified time interval to detect, 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 illustrates another optical device fault detection method provided in an embodiment of the present invention, where the method includes:
Wherein the optical device to be detected is at least one of the at least one optical device.
And step 403, the optical switch controls the first photoelectric conversion module to acquire the sampling light according to the control instruction of the second photoelectric conversion module.
The control instruction is an instruction which is acquired by the second photoelectric conversion module and is sent to the optical switch by the second photoelectric conversion module when the optical power of the optical signal passing through the last optical device in the optical transmission direction in the optical sensing link is smaller than a second power threshold.
In summary, in the method for detecting a failure of an optical device provided in the embodiments of the present invention, the optical sampling module can obtain an optical signal in a specified proportion from 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 failure when the optical power of the sampling light is smaller than the first power threshold. Compared with the indirect measurement method of judging whether the optical device has faults or not according to the electrical property of the driving structure of the optical device in the prior art, the method can obviously improve the accuracy of the detection result. And the first photoelectric conversion module detects based on the control instruction of the second photoelectric conversion module, so that the processing resource of the first photoelectric conversion module is saved, and the reliability of the optical device fault detection method is enhanced. Once a fault is detected in the optical fiber sensing link, the first optical device to be detected can be used as a starting point, and the detection can be performed sequentially backwards 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 apparatus 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 in the 4 optical devices to be detected is disposed in a light return portion of a light path through the circulator 001, and the remaining 3 optical devices to be detected are located in a light exit portion of the light path.
The above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An optical device failure detection apparatus, characterized in that the optical device failure detection apparatus is applied to a light sensing link including at least one optical device connected in an optical transmission direction,
the optical device failure detection apparatus includes: the photoelectric conversion module comprises a light sampling module and a 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 an optical signal 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, 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, and the first power threshold is a minimum power value for ensuring that the optical device to be detected normally operates.
2. The optical device failure detection apparatus according to claim 1, characterized in that the optical device failure detection apparatus comprises: 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.
3. The optical device failure detection apparatus according to claim 2, wherein the at least one optical device includes N optical devices, each of the N optical devices being 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 in one-to-one correspondence with the output ends of the N optical sampling modules, N is an integer larger than 1, and 1 output end of the optical switch is connected with the input end of the first photoelectric conversion module.
4. The device for detecting malfunction of optical device according to claim 2, wherein the at least one optical device includes N optical devices, at least one optical device of the N optical devices being an optical device to be detected,
the optical device fault detection device comprises M optical sampling modules, wherein an 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 mode, N is an integer larger 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 a transmission direction of an optical path in the N optical devices, input ends of 1 optical sampling module in the M optical sampling modules are configured to be connected with an output end of the first optical device, an input end of the optical switch is connected with an output end of the optical sampling module, and an output end of the optical switch is connected with an 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 other than the first optical device among the N optical devices, an output end of one optical sampling module is connected with an output end of the first optical device, an input end of another optical sampling module is connected with an input end of the first optical device, input ends of optical switches are connected with output ends of the 2 optical sampling modules, and output ends of the optical switches are respectively connected with 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 the optical device located before the optical device to be detected in the transmission direction of the optical path is determined to be fault-free according to the sampling light obtained by the optical sampling module connected to the input end, and the optical power of the sampling light obtained by the optical sampling module connected to the output end is smaller than a first power threshold.
5. The optical device failure detection apparatus according to claim 2, wherein the first photoelectric conversion module includes:
the comparison submodule is used for comparing the optical power of the sampling light with a first power threshold;
and the determining submodule is used for determining 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.
6. The optical device fault detection apparatus of claim 5, wherein the comparison submodule is configured to:
and comparing the optical power of the sampling light with a first power threshold value according to a specified time interval.
7. The optical device failure detection apparatus according to claim 5, 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 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, send a control instruction to the optical switch, where the control instruction is used to instruct the optical sampling module to acquire the sampling light of the optical device to be detected.
8. An optical device failure detection method applied to the optical device failure detection apparatus according to any one of claims 1 to 7, the method being applied to a light sensing link including at least one optical device connected in a light transmission direction,
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 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;
and when the optical power of the sampling light is smaller than a first power threshold, determining that the optical device to be detected has a fault by using a first photoelectric conversion module in the optical device fault detection device, wherein the first power threshold is a minimum power value for ensuring the normal operation of the optical device to be detected.
9. The method of claim 8, wherein the light device fault detection device 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 obtain the sampling light;
and comparing the optical power of the sampling light with a first power threshold value.
10. The method according to claim 8, wherein the optical device failure detection apparatus 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 failure, 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 sampling light with a first power threshold;
the control instruction is an instruction which is obtained by the second photoelectric conversion module and is sent to the optical switch by the second photoelectric conversion module when the optical power of the optical signal passing through the last optical device in the optical transmission direction in the optical sensing link is smaller than a second power threshold.
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