CN117451317A - Intelligent optical fiber detection system and method - Google Patents

Abstract

The application provides an intelligent optical fiber detection system and method, and belongs to the technical field of communication. Comprising the following steps: the device comprises a light source, a circulator, a detection module, at least one optical fiber to be detected and at least one optical filter. The light source inputs lasers with different wavelengths into a first end of the circulator and a first input end of the detection module; inputting laser into an optical fiber to be tested by a circulator; the optical fiber to be tested transmits the laser input by the circulator to the optical filter side; the optical filter reflects laser with preset wavelength back to the optical fiber to be tested and transmits laser except the preset wavelength; the optical fiber to be tested transmits the laser reflected by the optical filter to the circulator side; the circulator inputs the reflected laser into the detection module; the detection module records first time for receiving laser input by the light source and second time for receiving reflected laser, and determines the fault optical fiber according to the first time and the second time. The system solves the problems of high labor cost and low maintenance efficiency of the optical cable in the measuring mode of the optical fiber fault position.

Description

Intelligent optical fiber detection system and method

Technical field

The present application relates to the field of communication technology, and in particular to an intelligent optical fiber detection system and method.

Background technique

As an effective carrier for information transmission, optical fiber has the characteristics of high information transmission speed, large bandwidth, strong anti-interference ability and high security. However, optical fibers may also cause data loss and network interruption due to environmental effects or physical damage, which requires detection of the condition of the optical fibers.

At present, in the existing technology, optical frequency domain reflectometers and optical time domain reflectometers are usually used manually to measure fault locations in optical fibers.

However, the inventor found that the existing technology has at least the following technical problems: the current method of measuring optical fiber fault locations has high labor costs.

Contents of the invention

This application provides an intelligent optical fiber detection system and method to solve the problem of high labor costs in current measurement methods for optical fiber fault locations.

In a first aspect, this application provides an intelligent optical fiber detection system, including: a light source, a circulator, a detection module, at least one optical fiber to be tested, and at least one optical filter; the output end of the light source, the first end of the circulator, and the detection module The first input end of the circulator is connected, the second end of the circulator is connected to one end of the optical fiber to be tested, the third end of the circulator is connected to the second input end of the detection module, the optical fiber to be tested and the optical filter are alternately arranged and connected end to end; The light source is used to input laser light of different wavelengths into the first end of the circulator and the first input end of the detection module; the circulator is used to input the laser light into the optical fiber to be tested; the optical fiber to be tested is used to input the laser light from the circulator to Optical filter side transmission; the optical filter is used to reflect the laser of the preset wavelength back to the optical fiber to be tested, and transmit laser light other than the preset wavelength; the optical fiber to be tested is also used to reflect the laser reflected by the optical filter to the ring side transmission; the circulator is also used to input the reflected laser into the detection module; the detection module is used to record the first time of receiving the laser input from the light source and the second time of receiving each reflected laser. According to the second One time and each second time, the faulty fiber is determined.

In a possible implementation, the detection module is used to: subtract the first time from each second time to obtain each time difference; find the corresponding relationship between the preset time difference and the optical fiber according to each time difference, and obtain the target optical fiber corresponding to each time difference. ; In the corresponding relationship between the time difference and the optical fiber, the optical fiber other than the target optical fiber is determined as the optical fiber to be determined; the faulty optical fiber is determined based on the optical fiber to be determined and the preset optical fiber connection relationship.

In a possible implementation manner, the detection module is configured to determine, according to the optical fiber connection relationship, the optical fiber closest to the circulator among the optical fibers to be determined as the faulty optical fiber.

In a possible implementation, the detection module is also used to: subtract the first time from each second time to obtain each time difference; count the number of time differences; if the number of time differences is not equal to the preset standard value of the number of time differences, Then it is determined that there is a faulty fiber, otherwise there is no faulty fiber.

In a possible implementation, the detection module includes: a light detector and a data processing unit; the first input end of the light detector serves as the first input end of the detection module, and the second input end serves as the second input of the detection module. end, the output end of the light detector is connected to the data processing unit; the light detector is used to receive laser light, convert the laser light into electrical signals, and input the electrical signals into the data processing unit; the data processing unit is used to record the electrical signals Receiving time, and based on the receiving time of each electrical signal, the faulty optical fiber is determined.

In a possible implementation, it also includes: a spectrometer; the input end of the spectrometer is connected to the second end of the circulator, and each output end of the spectrometer is connected to each optical path to be measured, wherein the optical path to be measured includes alternately connected The optical fiber to be tested and the optical filter. The n-th filter in the target optical path to be tested has a different wavelength of laser reflection from the n-th filter in other optical paths to be tested, where n is a positive integer, and the target optical path to be tested is any The light path to be measured.

In a possible implementation, each optical path to be measured includes at least two optical filters of the same type, and the laser wavelength reflected by any one of the optical filters is the same.

In a possible implementation, the detection module is also used to: generate prompt information based on the faulty optical fiber; and send the prompt information to the fault monitoring terminal.

In a possible implementation, the detection module is also used to: obtain the target wavelength of the input laser; and determine the faulty optical fiber based on the target wavelength, the first time and each second time.

In a possible implementation, the detection module is used to: subtract the first time from each second time to obtain each time difference; read the target correspondence corresponding to the target wavelength, where the target correspondence stores the time difference and the optical fiber. Correspondence; find the target correspondence according to each time difference, and obtain the fault-free optical fiber corresponding to each time difference; determine the faulty optical fiber according to the fault-free optical fiber and the preset optical fiber connection relationship.

In the second aspect, this application provides an intelligent optical fiber detection method, which is applied to a faulty optical fiber determination system. The system includes: a light source, a circulator, a detection module, at least one optical fiber to be tested, and at least one optical filter; the output end of the light source and the circulator The first end of the circulator is connected to the first input end of the detection module, the second end of the circulator is connected to one end of the optical fiber to be tested, the third end of the circulator is connected to the second input end of the detection module, and the optical fiber to be tested is connected to the optical fiber. Filters are arranged alternately and connected end to end; methods include:

The light source inputs lasers of different wavelengths into the first end of the circulator and the first input end of the detection module; the circulator inputs the laser into the fiber to be tested; the fiber to be tested transmits the laser input from the circulator to the optical filter side; the optical filter Reflect the laser with the preset wavelength back to the optical fiber to be tested, and transmit laser light other than the preset wavelength; the optical fiber to be tested transmits the laser reflected by the optical filter to the circulator side; the circulator inputs the reflected laser into the detection module; detects The module records the first time when it receives the laser input from the light source and the second time when it receives each reflected laser, and determines the faulty optical fiber based on the first time and each second time.

The intelligent optical fiber detection system and method provided by this application inputs lasers of different wavelengths into the circulator and detection module through the light source. The circulator inputs the laser into the optical fiber to be tested, and the optical fiber to be tested transmits the laser to the optical filter. The optical filter transmits the laser to the optical fiber. The light of a specific wavelength is reflected back to the circulator, and then reaches the detection module from the circulator. The detection module determines whether there is a fault in the fiber to be tested and which fiber to be tested based on the time it receives the laser on the light source side and the laser on the circulator side. Manual on-site processing reduces labor costs and uses lower tool costs. Active monitoring and maintenance of optical cables improves the efficiency of optical cable maintenance and reduces the impact of optical cable failures.

Description of the drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Figure 1 is a schematic structural diagram of an intelligent optical fiber detection system provided by an embodiment of the present application;

Figure 2 is a schematic structural diagram of the detection module provided by the embodiment of the present application;

Figure 3 is a schematic structural diagram 2 of the intelligent optical fiber detection system provided by the embodiment of the present application;

Figure 4 is a schematic flowchart of the intelligent optical fiber detection method provided by the embodiment of the present application.

Reference signs

101-Light source;

102-circulator;

103-Detection module;

104-Optical fiber to be tested;

105-Optical filter;

1031-Light detector;

1032-Data processing unit;

106-Optical splitter.

Through the above-mentioned drawings, clear embodiments of the present application have been shown, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present application's concepts in any way, but are intended to illustrate the application's concepts for those skilled in the art with reference to specific embodiments.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the appended claims.

With the continuous development of information technology, the transmission speed of information has become an important factor affecting the speed of information processing. Currently, in order to transmit information faster, optical fibers are usually used to send and receive data. However, optical fiber can cause problems such as transmission rate reduction and data loss due to external influences.

In order to detect whether the optical fiber is operating normally, currently it is usually necessary to manually use an optical frequency domain reflectometer and an optical time domain reflectometer to measure the fault location in the optical fiber. This method has high labor costs.

In response to the above technical problems, the inventor proposed the following technical concept: input laser into the circulator through the light source, and also input the laser into the detection module, so that the circulator transmits the laser to the optical fiber, and the optical fiber transmits the laser to the optical filter, and the optical filter The laser of a specific wavelength is reflected back to the optical fiber. The optical fiber transmits the reflected laser to the circulator. The circulator transmits the reflected laser to the detection module. The detection module determines based on the time of receiving the light source laser and the time of receiving the circulator laser. Whether the optical fiber is damaged.

The technical solution of the present application and how the technical solution of the present application solves the above technical problems will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

Figure 1 is a schematic structural diagram of an intelligent optical fiber detection system provided by an embodiment of the present application. As shown in Figure 1, the intelligent optical fiber detection system 100 includes:

Light source 101, circulator 102, detection module 103, at least one optical fiber to be tested 104 and at least one optical filter 105.

The light source may include any one of a semiconductor laser, a semiconductor light-emitting diode, and a non-semiconductor laser. The circulator can be made using micro-optical fibers. The detection module may be a module with timing function and light detection function. The optical fiber under test can be any type of optical fiber. The optical filter may be a reflective filter.

As shown in Figure 1, the output end of the light source is connected to the first end of the circulator and the first input end of the detection module, the second end of the circulator is connected to one end of the optical fiber to be tested, and the third end of the circulator is connected to the detection module The second input end is connected, and the optical fiber to be tested and the optical filter are alternately arranged and connected end to end.

The direction of the arrow in Figure 1 is the direction of laser transmission. If there is no arrow in the line, it means that the laser can be transmitted in both directions. Each optical filter in the figure reflects different wavelengths.

The light source is used to input laser light of different wavelengths into the first end of the circulator and the first input end of the detection module. Circulator, used to input laser light into the fiber to be tested. The optical fiber under test is used to transmit the laser input from the circulator to the optical filter side. Optical filter is used to reflect the laser of the preset wavelength back to the optical fiber to be measured, and transmit the laser other than the preset wavelength. The fiber to be tested is also used to transmit the laser light reflected by the optical filter to the circulator side. The circulator is also used to input the reflected laser light into the detection module.

Among them, the light source can be connected to the circulator through a lens, a socket, a ferrule, etc., and the laser can be input into the circulator. The circulator transmits the laser input at the first end to the optical fiber under test connected to the second end. The optical fiber is used to transmit the laser incoming from one side to the other side. It naturally transmits the laser input from the circulator to the optical filter, and can also transmit the laser reflected by the optical filter to the circulator side. The optical fiber and optical filter shown in Figure 1 can be regarded as an "optical path" together. The circulator can be connected to more than one optical path. There can be multiple optical filters in the same optical path. The laser reflected by each optical filter in the same optical path The wavelength is different. When there are multiple optical paths, the optical filters can be sorted. The n-th optical filter in each optical path and the n-th optical filter in other optical paths reflect different laser wavelengths. When there is one optical path, the light source can input lasers of different wavelengths into the circulator and detection module at the same time. When there are at least two optical paths, the light source can input lasers of different wavelengths into the circulator and detection module respectively at certain intervals. .

For example (the numbers or marks after the devices in the following examples are for the convenience of examples and distinction, and are not used as marks in the drawings), the current circulator is followed by the optical fiber to be tested 11, optical filter 1, optical fiber to be tested 12, and optical filter 2. , fiber to be tested 13, optical filter 3. Optical filter 1, optical filter 2, and optical filter 3 reflect wavelengths of λ ₁ , λ ₂ , and λ ₃ respectively. The wavelength of the laser emitted by the light source includes λ ₁ , λ ₂ , and λ ₃ . The optical filter 1 will reflect the laser with the wavelength λ ₁ back to the optical fiber 11 under test, and transmit it to the monitoring module through the optical fiber 11 under test and the circulator. Filter 2 will reflect the laser with wavelength λ ₂ back to the optical fiber 12 to be tested, and transmit it to the monitoring module through the optical fiber 12 to be tested, the optical filter 1, the optical fiber to be tested 11, and the circulator. If the optical fiber to be tested 13 is damaged, then The laser with wavelength λ ₃ cannot reach the optical filter 3, and the detection module cannot receive the laser reflected by the optical filter 3. If the optical fiber 12 to be tested is damaged, the detection module cannot receive the laser light reflected by the optical filter 2 and the optical filter 3 .

The detection module is used to record the first time of receiving the laser input from the light source and the second time of receiving each reflected laser, and determine the faulty optical fiber based on the first time and each second time.

Among them, the first time and the second time when the laser is received can be obtained by obtaining the timestamp when the laser is received. The time difference can be obtained by subtracting the first time from the second time. When there is only one optical path, you can determine whether there are damaged optical fibers by counting the time difference or the number of second times. For example, there are currently 5 optical fibers to be tested in one optical path. Optical fiber and 5 optical filters, and there are only 3 second times or time differences, that is, only 3 reflected lasers are received, then it is determined that the penultimate optical fiber of this optical path is damaged or the last two optical fibers are damaged. When there are at least two optical paths, lasers of different wavelengths are input into the circulator and the detection module respectively. The detection module can correspondingly determine whether the laser of a certain wavelength is reflected, thereby determining whether the optical fiber is damaged.

It can be known from the description of the above embodiments that in the embodiment of the present application, lasers of different wavelengths are input into the circulator and the detection module through the light source. The circulator inputs the laser into the optical fiber to be tested, and the optical fiber to be tested transmits the laser to the optical filter. The optical filter The light of a specific wavelength is reflected back to the circulator, and then reaches the detection module from the circulator. The detection module determines whether there is a fault in the fiber to be tested and which fiber to be tested based on the time it receives the laser on the light source side and the laser on the circulator side. There is no need for manual on-site processing, which reduces labor costs, and the cost of tools used is low. Active monitoring and active maintenance of optical cables improves the efficiency of optical cable maintenance and reduces the impact of optical cable failures.

In a possible implementation, the detection module is used to perform the following steps:

S211: Subtract the first time from each second time to obtain each time difference.

For example, set the first time to 0 and the second time to 0.01 and 0.02 respectively. The time difference includes 0.01 and 0.02. For another example, the first time in the format of hours, minutes, seconds and milliseconds is "16:22:37:001", and the second time is "16:22:37:004", "16:22:37:007", then The time difference includes 0.003 seconds and 0.006 seconds.

S212: Find the corresponding relationship between the preset time difference and the optical fiber according to each time difference, and obtain the target optical fiber corresponding to each time difference.

In this step, the preset correspondence between the time difference and the optical fiber can be preset by the staff, and can be stored in a table, key-value, or other format. Since the length of the laser from each optical filter to the detection module through the optical fiber is fixed, the time for each optical filter to reflect the laser to the detection module is also fixed. The same is true for the time for the laser to be transmitted from the light source to the detection module. Therefore, different The time difference has a corresponding relationship with different optical filters. Since there is a positional connection relationship between each optical filter and each optical fiber to be tested, the time difference also has a corresponding relationship with the optical fiber to be tested.

For example, if the current time difference is 0.001 seconds and 0.003 seconds, in the corresponding relationship, 0.001 seconds corresponds to fiber A under test, and 0.003 seconds corresponds to fiber B under test, then both fiber A and fiber B are determined as the target fibers. For another example, the current time difference is 0.003 seconds and 0.006 seconds. In the corresponding relationship, 0.003 seconds corresponds to the fiber to be tested X, and 0.006 seconds corresponds to the fiber to be tested Y. Then both the fiber to be tested X and the fiber to be tested Y are determined as the target fibers.

S213: In the corresponding relationship between the time difference and the optical fiber, the optical fiber other than the target optical fiber is determined as the optical fiber to be determined.

In this step, for example, in the first example in the above-mentioned step S212, if in the corresponding relationship between the time difference and the optical fiber, in addition to the optical fiber to be tested A and the optical fiber to be tested B, there is also an optical fiber to be tested C, then the optical fiber to be tested C will be Determined as the fiber to be determined. For another example, in the first example in the above step S212, if in the corresponding relationship between the time difference and the optical fiber, in addition to the optical fiber to be tested A and the optical fiber to be tested B, there are also the optical fiber to be tested C and the optical fiber to be tested D, then the optical fiber to be tested will be Optical fiber C and optical fiber D to be tested are both determined as optical fibers to be determined. For another example, in the second example of the above step S212, in addition to the optical fiber to be tested X and the optical fiber to be tested Y, there is an optical fiber to be tested M, then the optical fiber to be tested M is determined to be the optical fiber to be tested.

S214: Determine the faulty optical fiber based on the optical fiber to be determined and the preset optical fiber connection relationship.

In this step, the preset optical fiber connection relationship may include the connection relationship between optical fibers. According to the connection relationship, it can be determined which optical fiber is faulty, and the optical fiber to be determined that is ranked first in the connection relationship can be determined as the faulty optical fiber. Optical fiber connection relationships can be stored in array, queue, table, text and other formats.

In a possible implementation, the detection module is used for:

According to the fiber connection relationship, the fiber closest to the circulator among the fibers to be determined is determined as the faulty fiber.

For example, there is currently only one optical path. The circulator is connected to the target fiber A. The target fiber A is connected to the target fiber B through an optical filter. The target fiber B is connected to the fiber C to be determined through the optical filter. The fiber C to be determined is connected to the optical filter. Connected to the optical fiber D to be determined. Since the optical fiber C to be determined is closer to the detection module than the optical fiber D to be determined (the optical fiber D to be determined needs to pass through the optical fiber C to be determined when transmitting the laser to the detection module), the optical fiber C to be determined is determined to be faulty. optical fiber. For another example, there are currently two optical paths. In the first optical path, the circulator is connected to the target optical fiber M, optical filter, target optical fiber N, optical filter, and to-be-determined optical fiber X in sequence; in the second optical path, the circulator is connected to the target optical fiber in sequence. P, optical filter, and optical fiber to be determined Y, then determine the optical fiber X and optical fiber Y to be determined as faulty optical fibers.

As can be seen from the description of the above embodiments, the embodiments of the present application calculate the time difference and find the corresponding relationship between the time difference and the optical fiber to obtain the target optical fiber corresponding to each time difference, and determine the remaining optical fiber to be detected in the corresponding relationship as the optical fiber to be determined. According to the predetermined According to the set connection relationship, the faulty fiber is determined from the fibers to be determined, realizing the automatic location of the faulty fiber and reducing labor costs.

In a possible implementation, the detection module is also used to perform the following steps:

S221: Subtract the first time from each second time to obtain each time difference.

This step is the same as the above-mentioned step S211 and will not be described again here.

S222: Count the number of time differences.

In this step, the initial number of time differences can be set to 0. Each time a time difference is obtained, the number of time differences is increased by 1 until all time differences are counted, and the number of time differences is obtained.

S223: If the number of time differences is not equal to the preset standard value of the number of time differences, it is determined that there is a faulty optical fiber, otherwise there is no faulty optical fiber.

In this step, the preset number of time differences may be determined by the staff through experiments or based on the system configuration. For example, if the preset standard value of the number of time differences is 7, and the number of time differences is 5, then there is a faulty optical fiber; for another example, if the preset standard value of the number of time differences is 9, and the number of time differences is 8, then there is a faulty optical fiber.

It can be seen from the description of the above embodiments that the embodiments of the present application calculate the time difference and count the number of time differences. When the number of time differences is not equal to the preset standard value of the number of time differences, it is determined that there is a faulty optical fiber, and direct determination based on the number of time differences is achieved. Whether there is any fiber failure, reduce manual participation and reduce labor costs.

Figure 2 is a schematic structural diagram of a detection module provided by an embodiment of the present application. As shown in FIG. 2 , the detection module 103 includes: a light detector 1031 and a data processing unit 1032 .

Among them, the photodetector can be a photomultiplier tube, a pyroelectric detector, a semiconductor photodetector, etc. The data processing unit can be a processor, programmable logic device, control board, etc.

The first input end of the light detector serves as the first input end of the detection module, the second input end serves as the second input end of the detection module, and the output end of the light detector is connected to the data processing unit.

A light detector is used to receive laser light, convert the laser light into electrical signals, and input the electrical signals into the data processing unit. The data processing unit is used to record the receiving time of each electrical signal, and determine the faulty optical fiber based on the receiving time of each electrical signal.

The receiving time of the electrical signal can also be obtained by obtaining the time stamp at the same time as the electrical signal is received. According to the reception time of the electrical signal, the method of determining the faulty optical fiber is similar to the above steps S211 to S214, and will not be described again here.

As can be seen from the description of the above embodiments, the embodiments of the present application convert optical signals into electrical signals by using photodetectors, and input the electrical signals into the data processing unit. The data processing unit records the reception time of the electrical signals. According to the reception time of the electrical signals, Determine the faulty optical fiber at the first time, realize photoelectric conversion and automatically check the faulty optical fiber, reduce labor costs and increase detection efficiency.

Figure 3 is a schematic second structural diagram of an intelligent optical fiber detection system provided by an embodiment of the present application. As shown in Figure 3, the intelligent optical fiber detection system also includes: an optical splitter 106.

The input end of the optical splitter is connected to the second end of the circulator, and each output end of the optical splitter is connected to each optical path to be tested. The optical path to be tested includes alternately connected optical fibers to be tested and optical filters. The target optical path to be tested is the third optical path. The laser wavelengths reflected by the n filters and the nth filter in other optical paths to be measured are different, where n is a positive integer, and the target optical path to be measured is any optical path to be measured.

The optical splitter can be any type of optical splitter. The connection between the optical splitter and the circulator can be through optical fiber, lens, ferrule, etc. The connection between the optical splitter and the optical path to be measured can also be through optical fiber, lens, ferrule, etc. connect.

For example, there are currently three optical paths, and the laser wavelengths reflected by the third filter in the three optical paths are λ ₁ , λ ₂ , and λ ₃ respectively. For another example, the wavelength reflected by the first filter of the first optical path among the three optical paths is λ ₁ , the wavelength reflected by the second filter of the second optical path is λ ₁ , and the wavelength reflected by the third filter of the third optical path is λ ₁ .

As can be seen from the description of the above embodiments, the embodiments of the present application use a spectrometer to connect different optical paths, and set the filters with the same order in each optical path as filters that reflect lasers of different wavelengths, so that each optical path can receive the same wavelength of laser light. When using laser, each optical path reflects the laser for a different time, thereby determining the faulty optical fiber in different optical paths, increasing the number of faulty optical fibers identified and reducing labor costs.

In a possible implementation, each optical path to be measured includes at least two optical filters of the same type, and the laser wavelength reflected by any one of the optical filters is the same.

Specifically, at least two optical filters of the same type, for example, two optical paths to be measured both contain optical filters of type A and type B, and for example, three optical paths to be measured all contain light of type A, type B, and type C. filter.

For example, there are currently two optical paths to be tested. There are two optical filters in the optical path 1 to be tested. The wavelength of the first optical filter’s reflected laser is λ ₁ , and the wavelength of the second optical filter’s reflected laser is both λ ₂ , where the first optical filter is closer to the circulator, and the second optical filter is farther from the circulator. There are the same two optical filters in the optical path 2 to be tested. In the optical path 2 to be tested, the second The first type of optical filter is closer to the circulator, and the first type of optical filter is farther from the circulator. At this time, the light source emits a laser with a wavelength of λ _1. The laser is reflected first in the optical path 1 to be measured, and the laser is reflected later in the optical path 2 to be measured. The detection module first receives the laser reflected in the optical path 1 to be measured, and then After receiving the laser reflected in the optical path 2 to be measured, the time difference from receiving the laser from the light source to receiving the laser from the two optical paths is different (the time difference corresponding to the optical path 2 to be measured is longer). The time difference can be used to distinguish which optical path it was received from. Reflected laser light.

For another example, there are currently three optical paths to be measured, and there are three optical filters O ₁ , O ₂ , and O ₃ , which reflect lasers with wavelengths λ ₁ , λ ₂ , and λ ₃ respectively. If the three optical filters in optical path 1 to be tested The distances from near to far between the filter and the circulator are O ₁ , O ₂ , and O ₃ . The distances between the three optical filters in the optical path 2 to be measured relative to the circulator from near to far can be O ₂ , O ₃ , O ₁ or O ₃ , O ₁ , O ₂ , if the order of the three optical filters in the optical path 1 to be measured is O ₁ , O ₂ , O ₃ , and the order of the three optical filters in the optical path 2 to be measured is O ₂ , O ₃ , O ₁ , then the order of the three optical filters in the optical path 3 to be measured is O ₃ , O ₁ , O _2. Through this different arrangement of the same type of optical filters, the laser of the same wavelength can be realized in different optical paths. The reflected time is different, and the time difference obtained is also different, so that when a certain time difference is missing, it can be determined which optical fiber in the optical path is faulty.

As can be seen from the description of the above embodiments, the embodiments of the present application realize the use of limited types of optical filters and limited types of laser wavelengths to detect optical fibers in multiple optical paths by using the same type of optical filters in different optical paths, reducing the cost Difficulty and cost of fiber optic inspection.

In a possible implementation, the detection module is also used to perform steps S231 and S232:

S231: Generate prompt information based on the faulty optical fiber.

In this step, the identification of the faulty optical fiber may be written into a preset prompt information template to obtain the prompt information.

S232: Send prompt information to the fault monitoring terminal.

In this step, the prompt information may be written into a data packet or message, and the data packet or message may be sent to the fault detection terminal. The fault detection terminal can display or voice the prompt information.

Among them, the fault detection terminal can be a mobile phone, computer, tablet, etc.

As can be seen from the description of the above embodiments, the embodiments of the present application generate prompt information corresponding to the faulty optical fiber and send the prompt information to the fault monitoring terminal to prompt when the optical fiber fails and visually display the fault.

In a possible implementation, the detection module is also used to perform step S241 and step S242:

S241: Obtain the target wavelength of the input laser.

This step may include receiving the input laser and converting the laser into an electrical signal. Since laser energy of different wavelengths is different, the energy of the converted electrical signal is also different. The target wavelength of the laser is obtained through the energy of the electrical signal. It may also include using a wavelength detector to directly measure the target wavelength of the laser.

S242: Determine the faulty optical fiber based on the target wavelength, the first time and each second time.

In this step, the corresponding relationship between the time difference corresponding to the target wavelength and the optical fiber can be read to obtain the target corresponding relationship, the second time is subtracted from the first time to obtain the target time difference, and the target corresponding relationship is searched based on the target time difference to obtain the fiber to be determined. , based on the fiber to be determined and the preset connection relationship, the faulty fiber is obtained. Except that the corresponding target correspondence relationship is read using the target wavelength, the other contents of this step are similar to the above-mentioned step S214 and will not be described again here.

As can be seen from the description of the above embodiments, the embodiments of the present application obtain the target wavelength of the input laser, and find the faulty optical fiber according to the target wavelength, the first time and the second time, so as to realize judgment for different laser wavelengths and increase the number of judgments. Accuracy, increasing the number of optical paths and optical fibers that can be detected at the same time.

In a possible implementation, the detection module is configured to perform steps S2421 to S2424.

S2421: Subtract the first time from each second time to obtain each time difference.

This step is similar to the above step S211 and will not be described again here.

S2422: Read the target correspondence corresponding to the target wavelength, where the target correspondence stores the correspondence between the time difference and the optical fiber.

In this step, the corresponding relationship between the preset wavelength and the corresponding relationship may be searched based on the target wavelength to obtain the target corresponding relationship.

Among them, the target correspondence can be preset by the staff based on experimental data or system connection relationships, and can be stored in a table or key-value equivalent format.

S2423: Find the target correspondence according to each time difference, and obtain the fault-free optical fiber corresponding to each time difference.

This step is similar to the above-mentioned step S212, except that the name of the target optical fiber is replaced with a fault-free optical fiber, which will not be described again here.

S2424: Determine the faulty optical fiber based on the fault-free optical fiber and the preset optical fiber connection relationship.

In this step, the optical fiber connected to the non-faulty optical fiber and on the side far away from the circulator may be determined as the faulty optical fiber.

For example, currently in an optical path of the system, the circulator is connected to the fault-free optical fiber A, the fault-free optical fiber A is connected to the fault-free optical fiber B, the fault-free optical fiber B is connected to the optical fiber C under test, and the optical fiber C under test is connected to the optical fiber D under test. If connected, the fiber C under test is the faulty fiber. For another example, the circulator connects the fault-free optical fiber a ₁ and the fault-free optical fiber b ₁ through an optical splitter. The fault-free optical fiber a ₁ is also connected to the fiber to be tested a ₂ through an optical filter. The fault-free optical fiber b ₁ is also connected to the optical fiber a 2 through an optical filter. The non-faulty optical fiber b ₂ is connected, and the non-faulty optical fiber b ₂ is also connected to the optical fiber to be tested b ₃ through an optical filter, then the optical fiber to be tested a ₂ and the optical fiber to be tested b ₃ are faulty optical fibers. There can be more or fewer fault-free fibers in the system.

As can be seen from the description of the above embodiments, the embodiment of the present application calculates the time difference between the first time and each second time, reads the target correspondence corresponding to the target wavelength, and searches for the fault-free optical fiber corresponding to each time difference in the target correspondence. From the fault-free optical fiber and the preset optical fiber connection relationship, the faulty optical fiber is obtained, and the faulty optical fiber can be located for lasers of different wavelengths, so that the faulty optical fiber can be located more accurately and the number of optical fibers that can be inspected is larger.

In one possible implementation, a beam splitter can be used to divide the laser into more optical paths, which are also called channels. In one possible implementation, taking two channels as an example, the light source can emit lasers with wavelengths of λ ₁ and λ ₂ , which are divided into two paths through the circulator and optical splitter and enter the fiber to be tested, and the end of the fiber to be tested 11 is connected to the center An optical filter with a wavelength of λ ₁ is connected to the end of the optical fiber 12 to be tested. An optical filter with a central wavelength of λ ₂ is connected to the end. Similarly, the end of the optical fiber to be tested 21 is connected to an optical filter with a central wavelength of λ 2. The end of the optical fiber to be tested 22 is connected to an optical filter. Enter the optical filter with a central wavelength of λ _1. At time T ₁ , the laser emits laser light with a central wavelength of λ _1. In channel 1, the laser is reflected by the optical filter λ ₁ and then enters the photodetector through the circulator, and the pulsed light is detected. The time is t ₁ . At the same time, in channel two, the laser passes through the fiber 21 to be tested, and then passes through the fiber 22 and is reflected by the optical filter. The time when the photodetector detects the pulse light is t ₂ . Since in channel two , the distance traveled by light in the optical fiber is approximately twice, and there is an obvious interval between t ₁ and t _2. Through data collection and processing, online monitoring of the optical fiber 11, the optical fiber 21 and the optical fiber 22 can be realized. At time T ₂ , the light source emits a laser with a central wavelength of λ _2. In channel 1, the laser passes through the fiber 11 to be tested, and then passes through the fiber 12 to be tested, and is reflected by the optical filter, enters the photodetector through the circulator, and the pulsed light is detected. The time is t ₃ . At the same time, in channel two, the laser is reflected by the optical filter through the optical fiber 21 to be tested. The time when the photodetector detects the pulse light is t ₄ . Since in channel one, the distance that the light passes in the optical fiber is About twice that of channel two, through data collection and processing, online monitoring of the optical fiber under test 11, the optical fiber under test 12 and the optical fiber under test 21 can be achieved. Therefore, through repeated switching of λ ₁ and λ ₂ lasers, the system can realize online monitoring of all spare optical fibers. In the same way, the system can be expanded to 4 channels, each channel is connected to 4 backup fibers, and further can be expanded to 8 channels, each channel is connected to 8 backup fibers, and so on.

For the case of four channels: the laser can emit lasers with wavelengths of λ ₁ , λ ₂ , λ ₃ , and λ ₄ , which are divided into four channels through the circulator and optical splitter and enter the optical fiber to be tested. Take one of the channels as an example to illustrate: the light source is Laser, the end of the optical fiber to be tested is connected to an optical filter with a central wavelength of λ ₁ , the end of the optical fiber to be tested is connected to an optical filter with a central wavelength of λ ₂ , and the end of the optical fiber to be tested is connected to an optical filter with a central wavelength of λ ₃ . Filter, the end of the optical fiber 14 to be tested is connected to an optical filter with a central wavelength of λ _4. At time T ₁ , the laser emits laser light with a central wavelength of λ ₁ , which is reflected by the filter λ ₁ and is detected by the optical detector for a time of t ₁ . When T ₂ , the laser emits a laser with a center wavelength λ ₂ , which is reflected by the filter λ ₂ , and is detected by the photodetector for a time of t _2. When T ₃ , the laser emits a laser with a center wavelength λ ₃ , which is reflected by the filter λ ₃ . The detection time by the photodetector is t ₃ . When T ₄ , the laser emits laser light with a central wavelength λ ₄ , which is reflected by the optical filter λ ₄ . The detection time by the detector is t ₄ . Each channel reflects the laser light of wavelength λ ₁ The design is significantly different. The time is used to determine which optical cable is currently being tested. After four sets of laser polling measurements λ ₁ , λ ₂ , λ ₃ , and λ ₄ , online monitoring of all optical fibers under test can be completed.

Figure 4 is a schematic flowchart of the intelligent optical fiber detection method provided by the embodiment of the present application. The intelligent optical fiber detection method is applied to the above-mentioned intelligent optical fiber detection system. As shown in Figure 4, the method includes:

S401: The light source inputs lasers of different wavelengths into the first end of the circulator and the first input end of the detection module.

S402: The circulator inputs the laser into the optical fiber to be tested.

S403: The optical fiber under test transmits the laser input from the circulator to the optical filter side.

S404: The optical filter reflects the laser of the preset wavelength back to the optical fiber to be tested, and transmits the laser other than the preset wavelength.

S405: The optical fiber under test transmits the laser reflected by the optical filter to the circulator side.

S406: The circulator inputs the reflected laser light into the detection module.

S407: The detection module records the first time when it receives the laser input from the light source and the second time when it receives each reflected laser, and determines the faulty optical fiber based on the first time and each second time.

The methods provided by the embodiments of the present application have similar effects to those of the above-mentioned system embodiments, and will not be described again here.

In a possible implementation manner, the intelligent optical fiber detection method includes: the detection module subtracts the first time from each second time to obtain each time difference. Find the corresponding relationship between the preset time difference and the optical fiber according to each time difference, and obtain the target optical fiber corresponding to each time difference. In the corresponding relationship between the time difference and the optical fiber, the optical fiber other than the target optical fiber is determined as the optical fiber to be determined. Determine the faulty fiber based on the fiber to be determined and the preset fiber connection relationship. The methods provided by the embodiments of the present application have similar effects to those of the above-mentioned system embodiments, and will not be described again here.

In a possible implementation manner, the intelligent optical fiber detection method includes: the detection module determines the optical fiber closest to the circulator among the optical fibers to be determined as the faulty optical fiber according to the optical fiber connection relationship.

The methods provided by the embodiments of the present application have similar effects to those of the above-mentioned system embodiments, and will not be described again here.

In a possible implementation manner, the intelligent optical fiber detection method includes: the detection module subtracts the first time from each second time to obtain each time difference. Count the number of time differences. If the number of time differences is not equal to the preset standard value of the number of time differences, it is determined that there is a faulty fiber, otherwise there is no faulty fiber.

The methods provided by the embodiments of the present application have similar effects to those of the above-mentioned system embodiments, and will not be described again here.

In a possible implementation, the detection module includes a light detector and a data processing unit. The first input end of the light detector serves as the first input end of the detection module, the second input end serves as the second input end of the detection module, and the output end of the light detector is connected to the data processing unit.

The intelligent optical fiber detection method includes: a light detector receives laser light, converts the laser light into an electrical signal, and inputs the electrical signal into a data processing unit. The data processing unit records the reception time of each electrical signal, and determines the faulty optical fiber based on the reception time of each electrical signal.

The methods provided by the embodiments of the present application have similar effects to those of the above-mentioned system embodiments, and will not be described again here.

In a possible implementation manner, the above method further includes: a detection module: generating prompt information according to the faulty optical fiber. Send prompt information to the fault monitoring terminal.

The methods provided by the embodiments of the present application have similar effects to those of the above-mentioned system embodiments, and will not be described again here.

In a possible implementation, the above method further includes: the detection module obtains the target wavelength of the input laser. Determine the faulty optical fiber based on the target wavelength, the first time and each second time.

The methods provided by the embodiments of the present application have similar effects to those of the above-mentioned system embodiments, and will not be described again here.

In a possible implementation manner, the above method includes: the detection module subtracts the first time from each second time to obtain each time difference. Read the target correspondence corresponding to the target wavelength, where the target correspondence stores the correspondence between the time difference and the optical fiber. Find the target correspondence according to each time difference and obtain the fault-free optical fiber corresponding to each time difference. Determine the faulty optical fiber based on the fault-free optical fiber and the preset optical fiber connection relationship.

The methods provided by the embodiments of the present application have similar effects to those of the above-mentioned system embodiments, and will not be described again here.

The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the disclosure scope involved in this application is not limited to technical solutions composed of specific combinations of the above technical features, but should also cover solutions consisting of the above technical features or without departing from the above disclosed concept. Other technical solutions formed by any combination of equivalent features. For example, a technical solution is formed by replacing the above features with technical features with similar functions disclosed in this application (but not limited to).

Other embodiments of the present application will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary technical means in the technical field that are not disclosed in this application. . It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It is to be understood that the present application is not limited to the precise structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (11)

1. An intelligent optical fiber detection system, characterized by including: A light source, a circulator, a detection module, at least one optical fiber to be tested and at least one optical filter; The output end of the light source is connected to the first end of the circulator and the first input end of the detection module, the second end of the circulator is connected to one end of the optical fiber to be tested, and the circulator's The third end is connected to the second input end of the detection module, and the optical fiber to be tested and the optical filter are alternately arranged and connected end to end; The light source is used to input laser light of different wavelengths into the first end of the circulator and the first input end of the detection module; the circulator is used to input the laser light into the optical fiber to be tested; The optical fiber to be tested is used to transmit the laser input from the circulator to the optical filter side; the optical filter is used to reflect the laser with a preset wavelength back to the optical fiber to be tested, and transmit the laser except the Laser light other than the preset wavelength; the optical fiber to be tested is also used to transmit the laser light reflected by the optical filter to the circulator side; the circulator is also used to input the reflected laser light The detection module; The detection module is configured to record the first time when the laser input from the light source is received and the second time when each reflected laser is received, and determine the faulty optical fiber based on the first time and each second time. 2. The system according to claim 1, characterized in that the detection module is used for: Subtract the first time from each second time to obtain each time difference; Find the corresponding relationship between the preset time difference and the optical fiber according to each time difference, and obtain the target optical fiber corresponding to each time difference; In the corresponding relationship between the time difference and the optical fiber, the optical fiber other than the target optical fiber is determined as the optical fiber to be determined; According to the optical fiber to be determined and the preset optical fiber connection relationship, the faulty optical fiber is determined. 3. The system according to claim 2, characterized in that the detection module is used for: According to the optical fiber connection relationship, the optical fiber closest to the circulator among the optical fibers to be determined is determined as the faulty optical fiber. 4. The system according to claim 1, characterized in that the detection module is also used to: Subtract the first time from each second time to obtain each time difference; Count the number of said time differences; If the number of time differences is not equal to the preset standard value of the number of time differences, it is determined that a faulty optical fiber exists; otherwise, there is no faulty optical fiber. 5. The system according to claim 1, characterized in that the detection module includes: a light detector and a data processing unit; The first input end of the photodetector serves as the first input end of the detection module, the second input end serves as the second input end of the detection module, and the output end of the photodetector is connected to the data processing unit. connect; The photodetector is used to receive laser light, convert the laser light into electrical signals, and input the electrical signals into the data processing unit; the data processing unit is used to record the reception time of each electrical signal, and calculate the time according to each electrical signal. The receiving time determines the faulty fiber. 6. The system of claim 1, further comprising: a beam splitter; The input end of the optical splitter is connected to the second end of the circulator, and each output end of the optical splitter is connected to each optical path to be tested, wherein the optical path to be tested includes alternately connected optical fibers to be tested and optical filters. , the laser wavelength reflected by the nth filter in the target optical path to be measured is different from that of the nth filter in other optical paths to be measured, where n is a positive integer, and the target optical path to be measured is any optical path to be measured. 7. The system according to claim 6, wherein each optical path to be measured includes at least two optical filters of the same type, and any one of the optical filters reflects the same wavelength of laser light. 8. The system according to any one of claims 1 to 7, characterized in that the detection module is also used to: Generate prompt information based on the faulty optical fiber; Send the prompt information to the fault monitoring terminal. 9. The system according to any one of claims 1 to 7, characterized in that the detection module is also used to: Get the target wavelength of the input laser; According to the target wavelength, the first time and each second time, the faulty optical fiber is determined. 10. The system according to claim 9, characterized in that the detection module is used for: Subtract the first time from each second time to obtain each time difference; Read the target correspondence corresponding to the target wavelength, wherein the target correspondence stores the correspondence between the time difference and the optical fiber; Find the target correspondence according to each time difference and obtain the fault-free optical fiber corresponding to each time difference; According to the fault-free optical fiber and the preset optical fiber connection relationship, the faulty optical fiber is determined. 11. An intelligent optical fiber detection method, characterized in that it is applied to a faulty optical fiber determination system. The system includes: a light source, a circulator, a detection module, at least one optical fiber to be tested, and at least one optical filter; the output of the light source The end is connected to the first end of the circulator and the first input end of the detection module, the second end of the circulator is connected to one end of the optical fiber to be tested, and the third end of the circulator is connected to the The second input end of the detection module is connected, and the optical fiber to be tested and the optical filter are alternately arranged and connected end to end; the method includes: The light source inputs lasers of different wavelengths into the first end of the circulator and the first input end of the detection module; the circulator inputs the laser into the optical fiber to be tested; the optical fiber to be tested The laser input by the circulator is transmitted to the optical filter side; the optical filter reflects the laser with a preset wavelength back to the optical fiber to be measured, and transmits laser other than the preset wavelength; the optical filter is The optical fiber transmits the laser light reflected by the optical filter to the circulator side; the circulator inputs the reflected laser light into the detection module; the detection module records the first step of receiving the laser light input from the light source. A time and each second time when each reflected laser light is received, and the faulty optical fiber is determined based on the first time and each second time.