System and method for querying target optical cable in adjacent optical cables

Abstract

The invention belongs to the technical field of electric power facilities, and particularly relates to a system and method for inquiring a target optical cable in adjacent optical cables, a sensing optical fiber is selected from two adjacent optical cables at will, the head ends of the two selected sensing optical fibers are connected to the system, and after the system is started, the target optical cable is inquired. According to the system, two sensing optical fibers are used for receiving direct light and generating scattered light, when the tail of an optical cable is knocked, vibration of the optical cable can cause small changes of physical characteristics of the sensing optical fibers, then the characteristics of the scattered light generated when the light is propagated in the optical fibers are changed, and through collection and processing of the scattered light, the optical cable is detected. When the optical cable is knocked, the first vibration information or the second vibration information reflecting the vibration condition of the optical cable can be obtained, the vibration condition of the sensing optical fiber in the knocked optical cable is relatively strong, and the vibration condition of the sensing optical fiber in the adjacent optical cable is relatively weak, so that the end-to-end corresponding relation of the two adjacent optical cables is determined, and the condition of mistaken shearing is avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power facilities, and particularly relates to a system and method for querying a target optical cable in adjacent optical cables. BACKGROUND

[0002] With the rapid development of modern communication technology, especially the popularization of applications such as 5G, fiber to the home (FTTH), data center interconnection (DCI), the number of optical cables laid in underground pipelines, overhead poles and machine rooms presents an explosive growth.

[0003] A typical optical cable is composed of 12-48 sensing optical fibers. Optical cables are usually densely laid in limited space (such as pipelines, wire slots, optical exchange boxes, ODF racks) in a bundle, multiple parallel manner, forming a highly complex physical network topology. This dense laying leads to the close proximity of optical cables, highly similar physical appearance (same model, same color sheath), and possible crossing in the middle of the optical cable due to bundling, making it difficult to distinguish whether the head and tail of the optical cable correspond one by one with the naked eye.

[0004] In daily network maintenance, fault location, service splicing, network expansion and other scenarios, accurately and efficiently identifying and locating a specific target optical cable is a crucial first step. Incorrect operations (such as mistakenly cutting non-target optical cables) will lead to serious communication interruption accidents, causing significant economic losses and social impact.

[0005] Therefore, in the dense and complex environment of adjacent optical cables, quickly and error-free finding the target optical cable is a basic and extremely challenging task for network maintenance personnel. SUMMARY

[0006] In view of this, the application provides a system and method for querying a target optical cable in adjacent optical cables to solve the technical problem that it is difficult to distinguish whether the head and tail of two adjacent optical cables correspond one by one with the naked eye in the prior art.

[0007] To achieve the above-mentioned purpose, the following solutions are adopted in the present application: The application discloses a system for inquiring a target optical cable in adjacent optical cables, which is used for accessing a head end of any one sensing optical fiber in two adjacent optical cables respectively, the two sensing optical fibers are a first sensing optical fiber and a second sensing optical fiber, and the tail end of any one optical cable is knocked, and the head-tail corresponding relationship of the optical cable corresponding to any one sensing optical fiber is judged according to vibration information of the first sensing optical fiber and the second sensing optical fiber, so that the target optical cable is found from the tail ends of the two adjacent optical cables. The system comprises a first direct light emitting unit, a second direct light emitting unit, a first optical circulator, a second optical circulator, a first analysis module, a second analysis module and a waveform comparison module. The first direct light emitting unit is connected with a first port of the first optical circulator, a second port of the first optical circulator is connected with the first sensing optical fiber, a third port of the first optical circulator is connected with the first analysis module, and the first analysis module is connected with the waveform comparison module. The second direct light emitting unit is connected with a fourth port of the second optical circulator, a fifth port of the second optical circulator is connected with the second sensing optical fiber, a sixth port of the second optical circulator is connected with the second analysis module, and the second analysis module is connected with the waveform comparison module. In response to the operation personnel starting the system, the first direct light emitting unit emits first direct light to the first port, the first direct light is output to the first sensing optical fiber through the second port, the first sensing optical fiber generates first scattered light to the second port after receiving the first direct light, the first scattered light is continuously output to the first analysis module through the third port, the first analysis module generates corresponding first waveform information according to the first scattered light, and the first waveform information is stored; the first analysis module is also used for generating corresponding second waveform information according to the first scattered light which changes currently in response to a recording signal generated by the operation personnel pressing a recording button when the tail end of any one optical cable is knocked, wherein the first scattered light which changes currently refers to the first scattered light which is shaken due to the vibration of the sensing optical fiber caused by knocking the tail end of any one optical cable; the first analysis module compares the first waveform information with the second waveform information to obtain first vibration information, and provides the first vibration information to the waveform comparison module.The second direct light emitting unit emits second direct light to the fourth port, the second direct light is output to the second sensing optical fiber through the fifth port, the second sensing optical fiber generates second scattered light to the fifth port after receiving the second direct light, the second scattered light is output to the second analysis module through the sixth port, the second analysis module generates corresponding third waveform information according to the second scattered light, and stores the third waveform information. The second analysis module also generates corresponding fourth waveform information according to the second scattered light which changes currently in response to the record signal generated by the record button pressed by the operator when knowing the action of knocking the tail of any optical cable occurs, wherein the second scattered light which changes currently refers to the second scattered light which is shaken due to the vibration of the sensing optical fiber caused by the tail of any optical cable being knocked; the second analysis module compares the third waveform information with the fourth waveform information to obtain second vibration information, and provides the second vibration information to the waveform comparison module; the waveform comparison module is used for comparing the size of the first vibration information and the second vibration information, and when the first vibration information is greater than the second vibration information, it is determined that the first sensing optical fiber corresponding to the first vibration information is the sensing optical fiber in the optical cable which is knocked, and when the second vibration information is greater than the first vibration information, it is determined that the second sensing optical fiber corresponding to the second vibration information is the sensing optical fiber in the optical cable which is knocked.

[0008] Preferably, the first direct light emitting unit is a first laser, and the second direct light emitting unit is a second laser.

[0009] Preferably, the first analysis module and the second analysis module each include an optical-electric conversion module, an analog-digital conversion module, a filtering module and a control module, the optical-electric conversion module converts the first scattered light or the second scattered light into an interference electric signal and outputs the interference electric signal to the analog-digital conversion module, the analog-digital conversion module outputs the interference electric signal after analog-digital conversion to the filtering module, the filtering module filters the interference electric signal to obtain a waveform signal and outputs the waveform signal to the control module, the control module analyzes the waveform signal by using an intensity demodulation method to obtain the first vibration information and the second vibration information respectively, and outputs the first vibration information and the second vibration information to the waveform comparison module, and the waveform comparison module performs waveform comparison on the first vibration information and the second vibration information obtained at the same time.

[0010] Preferably, the system further includes a switching module, a first input end of the switching module is connected with the first direct light emitting unit, a second input end of the switching module is connected with the second direct light emitting unit, a first output end of the switching module is connected with the first port, and a second output end of the switching module is connected with the fourth port, and the switching module is used for selectively guiding the first direct light and the second direct light into different optical paths.

[0011] A method for querying a target optical cable among adjacent optical cables, using the aforementioned system for querying target optical cables among adjacent optical cables, includes the following steps: S10. Select two adjacent optical cables, and arbitrarily select one sensing fiber from each of the two adjacent optical cables. These two sensing fibers are the first sensing fiber and the second sensing fiber, respectively. S20. Connect the first end of the first sensing fiber to the second port of the first optical circulator, and connect the first end of the second sensing fiber to the fourth port of the second optical circulator. S30. The operator initiates the above system in response; S40. A first direct-light emitting unit emits a first direct-light beam to a first sensing fiber. The first sensing fiber receives the first direct-light beam, generates first scattered light, and outputs it to a first analysis module. The first analysis module generates corresponding first waveform information based on the first scattered light and stores the first waveform information. The first analysis module is also used to respond to a recording signal generated when an operator presses a record button after knowing that a tapping action has occurred on the tail of any optical cable. Based on the currently changing first scattered light, it generates corresponding second waveform information, where the currently changing first scattered light refers to the first scattered light that vibrates due to the vibration of the sensing fiber caused by tapping the tail of any optical cable. The first analysis module compares the first waveform information with the second waveform information to obtain first vibration information and outputs it to a waveform comparison module. The module employs a second direct light emitting unit to emit a second direct light to a second sensing fiber. The second sensing fiber receives the second direct light and then emits a second scattered light to a second analysis module. The second analysis module generates and stores corresponding third waveform information based on the second scattered light. The second analysis module also responds to a recording signal generated when an operator presses a record button after knowing that the tail of any optical cable has been struck. Based on the currently changing second scattered light, it generates corresponding fourth waveform information, where the currently changing second scattered light refers to the second scattered light that vibrates due to the vibration of the sensing fiber caused by striking the tail of any optical cable. The second analysis module compares the third waveform information with the fourth waveform information to obtain second vibration information and outputs it to a waveform comparison module. S50. The waveform comparison module compares the waveforms of the first vibration information and the second vibration information and makes the first record. The sensing fiber corresponding to the information with stronger waveform is the sensing fiber inside the striking optical cable, thereby determining the head-to-tail correspondence between the two optical cables and accurately finding the target optical cable from the two adjacent optical cables.

[0012] Preferably, the step of obtaining the first vibration information includes: S111. The photoelectric conversion module in the first analysis module converts the interference optical signal of the first scattered light into an interference electrical signal, and outputs the interference electrical signal to the analog-to-digital conversion module in the first analysis module; S112. After receiving the interference electrical signal, the analog-to-digital conversion module in the first analysis module converts it into a digital signal and outputs it to the filtering module in the first analysis module; S113. After receiving the digital signal, the filtering module in the first analysis module performs filtering processing to obtain the filtered signal, and outputs it to the control module in the first analysis module. S114. After analyzing the filtered signal using the intensity demodulation method in the control module of the first analysis module, the first vibration information is obtained.

[0013] Preferably, the step of obtaining the second vibration information includes: S121. The photoelectric conversion module in the second analysis module converts the interference optical signal of the second scattered light into an interference electrical signal, and outputs the interference electrical signal to the analog-to-digital conversion module in the second analysis module; S122. After receiving the interference electrical signal, the analog-to-digital conversion module in the second analysis module converts it into a digital signal and outputs it to the filtering module in the second analysis module; S123. After receiving the digital signal, the filtering module in the second analysis module performs filtering processing to obtain the filtered signal, and outputs it to the control module in the first analysis module. S124. The intensity demodulation method in the control module of the second analysis module analyzes the filtered signal to obtain the second vibration information.

[0014] Preferably, the following verification steps are also included: S41. Connect the second direct light emitting unit to the first input terminal of the switching module, and connect the first direct light emitting unit to the second input terminal of the switching module; S42. Continue tapping the end of the same fiber optic cable; S43. The second direct light emitting unit emits a third direct light to the first port. The third direct light is output to the first sensing fiber through the second port. After receiving the third direct light, the first sensing fiber generates a third scattered light to the second port. The third scattered light is output to the first analysis module through the third port. The first analysis module receives and processes the third scattered light and compares it with the initial scattered light generated by the first sensing fiber in the state of no impact on the optical cable, to obtain third vibration information, and outputs it to the waveform comparison module. The first direct light emitting unit emits a fourth direct light to the fourth port. The fourth direct light is output to the second sensing fiber through the fifth port. After receiving the fourth direct light, the second sensing fiber generates a fourth scattered light to the fifth port. The fourth scattered light is output to the first analysis module through the sixth port. The second analysis module receives and processes the fourth scattered light and compares it with the initial scattered light generated by the second sensing fiber in the state of no impact on the optical cable, to obtain fourth vibration information, and outputs it to the waveform comparison module. S44. The waveform comparison module compares the waveforms of the third vibration information and the fourth vibration information and makes a second record. If the first record and the second record are inconsistent, it indicates that there is a fault in the first direct light emitting unit or the second direct light emitting unit. S45. Stop work, inspect, and troubleshoot.

[0015] In the aforementioned system and method for querying target optical cables among adjacent optical cables, the first operator sets up the system for querying target optical cables among adjacent optical cables at the end of the cable, i.e., the end of the optical cable distribution frame. This optical cable distribution frame has multiple layers, each with multiple ports. Each port on each layer is originally connected to multiple sensing optical fibers from an optical cable, and each sensing optical fiber has an identification tag. Two adjacent optical cables are selected from this optical cable distribution frame, and one sensing optical fiber is randomly selected from each, namely the first sensing optical fiber and the second sensing optical fiber. The excess port on the first layer of the optical cable distribution frame where the first sensing optical fiber is located is connected to the first port in this system, and the excess port on the first layer of the optical cable distribution frame where the second sensing optical fiber is located is connected to the fourth port in this system. This connects the beginning ends of the two sensing optical fibers to this system. After the system is started, the system uses the two sensing optical fibers to receive direct light and generate scattered light. The second operator can then tap the end of any optical cable. When the end of an optical cable is tapped, the vibration causes a slight change in the physical properties of the sensing fiber within it. This alters the characteristics of the scattered light generated as the light propagates through the fiber. By collecting and processing the scattered light, first or second vibration information reflecting the cable's vibration can be obtained. The vibration of the sensing fiber tapped in the optical cable is stronger, while the vibration of the sensing fiber in the adjacent optical cable is weaker. If the first vibration information is greater than the second vibration information, the first sensing fiber corresponding to the first vibration information is identified as the sensing fiber within the tapped cable. If the second vibration information is greater than the first vibration information, the second sensing fiber corresponding to the second vibration information is identified as the sensing fiber within the tapped cable. Based on these comparison results, the first operator informs the second operator tapping the cable whether the cable being tapped is the target optical cable, preventing accidental cutting and greatly improving the accuracy of identifying the target optical cable. Attached Figure Description

[0016] Fig. 1 This is a functional block diagram of the present invention.

[0017] Fig. 2 This is a flowchart of the present invention.

[0018] Fig. 3 This is a working logic diagram of the present invention. Detailed Implementation

[0019] To facilitate understanding of this application, a more comprehensive description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are also given. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of this application.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] For ease of understanding, the following background technical information is provided: The first ends of multiple sensing optical fibers in an optical cable are often connected to the corresponding interfaces in the equipment room, such as the optical cable distribution frame, while the middle and tail ends are buried in underground trenches. Adjacent optical cables are generally bundled together and buried underground. In this application, the access position of the sensing optical fiber is the first end of the sensing optical fiber, which is to connect to the port above the optical cable distribution frame. The sensing fiber is an extremely sensitive component. When the sensing fiber in the optical cable senses the vibration wave of an impact, the vibration wave will be transmitted along the sensing fiber to the beginning, which is the access point of the sensing fiber in this application.

[0022] Please refer to Figs. 1 to 3In a specific embodiment of this application, a system for querying a target optical cable among adjacent optical cables is provided. This system involves connecting to the beginning of any one of two adjacent optical cables, designated as a first sensing fiber and a second sensing fiber, and tapping the end of either cable. Based on the vibration information from the first and second sensing fibers, the system determines the beginning-end correspondence of the optical cable corresponding to the first sensing fiber, thereby identifying the target optical cable from the ends of the two adjacent optical cables. The system includes: a first direct-light emitting unit, a second direct-light emitting unit, a first optical circulator, a second optical circulator, a first analysis module, a second analysis module, and a waveform comparison module. The first direct-light emitting unit is connected to a first port of the first optical circulator, a second port of the first optical circulator is connected to the first sensing fiber, a third port of the first optical circulator is connected to the first analysis module, and the first analysis module is connected to the waveform comparison module. The second direct-light emitting unit is connected to a fourth port of the second optical circulator, a fifth port of the second optical circulator is connected to the second sensing fiber, and the second optical circulator... The sixth port is connected to the second analysis module, and the second analysis module is connected to the waveform comparison module. In response to an operator activating the system, the first direct light emitting unit emits a first direct light to the first port. The first direct light is output to the first sensing fiber through the second port. Upon receiving the first direct light, the first sensing fiber generates a first scattered light to the second port. The first scattered light is continuously output to the first analysis module through the third port. The first analysis module generates corresponding first waveform information based on the first scattered light and stores the first waveform information. The first analysis module is also used to respond to a recording signal generated when an operator presses the record button upon knowing that a tapping action has occurred on the tail of any optical cable. Based on the currently changing first scattered light, it generates corresponding second waveform information. The currently changing first scattered light refers to the first scattered light that vibrates due to the vibration of the sensing fiber caused by tapping the tail of any optical cable. The first analysis module compares the first waveform information with the second waveform information to obtain first vibration information and provides the first vibration information to the waveform comparison module.The second direct light emitting unit emits a second direct light to the fourth port. The second direct light is output to the second sensing fiber through the fifth port. After receiving the second direct light, the second sensing fiber generates a second scattered light to the fifth port. The second scattered light is output to the second analysis module through the sixth port. The second analysis module generates corresponding third waveform information based on the second scattered light and stores the third waveform information. The second analysis module is also used to respond to the recording signal generated when the operator knows that the action of tapping the tail of any optical cable has occurred and presses the recording button, and generates corresponding fourth waveform information based on the currently changing second scattered light. The currently changing third waveform information... Second-scattered light refers to the second scattered light caused by the vibration of the sensing fiber due to striking the tail of any optical cable. The second analysis module compares the third waveform information with the fourth waveform information to obtain the second vibration information, and provides the second vibration information to the waveform comparison module. The waveform comparison module compares the magnitudes of the first vibration information and the second vibration information. When the first vibration information is greater than the second vibration information, the first sensing fiber corresponding to the first vibration information is identified as the sensing fiber within the striking optical cable. When the second vibration information is greater than the first vibration information, the second sensing fiber corresponding to the second vibration information is identified as the sensing fiber within the striking optical cable.

[0023] In this embodiment, the system for querying the target optical cable among adjacent optical cables first selects two adjacent optical cables from the optical cable distribution frame in the equipment room to identify the target optical cable. The target optical cable needs to be cut for maintenance or other work. However, the two adjacent optical cables may be bundled, crossed, or tangled together, causing misalignment of the ends and potentially leading to accidental cutting. The first operator, positioned in the equipment room, randomly selects one sensing fiber from each of the two selected adjacent optical cables. This can be distinguished as the first sensing fiber and the second sensing fiber. The excess port on the first layer of the optical cable distribution frame containing the first sensing fiber can be connected to the first port in this system, and the excess port on the first layer of the optical cable distribution frame containing the second sensing fiber can be connected to the fourth port in this system. This connects the beginnings of both sensing fibers to the system (each fiber has an identification tag). After connection, the system is activated, causing the first and second direct-light emitting units to start working. The second operator then taps the end of the first sensing fiber or... The system connects the first and second sensing fibers to the tail of the fiber and informs the second operator of the comparison results, confirming whether the cable being tapped is the target fiber. For example, the first operator informs the second operator by phone that the first and second sensing fibers are connected, and that the first sensing fiber (identified by an identification tag) is connected to the first laser. Upon receiving this, the second operator begins tapping the tail of the fiber corresponding to the first sensing fiber and informs the first operator. The first operator then informs the second operator of the system's comparison results, confirming whether the cable being tapped is the target fiber, thus avoiding accidental cutting and greatly improving the accuracy of identifying the target fiber. The first direct-light emitting unit emits direct light to the first port of the first optical circulator. An optical circulator is an optical device with a specific transmission direction, which allows optical signals to be transmitted in a specific port sequence. Here, the first direct light beam is output to the first sensing fiber through the second port of the first optical circulator. When the first direct light propagates in the first sensing fiber, if the optical cable vibrates, it will cause a slight change in the physical state of the sensing fiber (such as length and refractive index). This slight change will affect the propagation characteristics of light in the sensing fiber, thereby changing the characteristics of the scattered light. For example, vibration will cause a slight strain in the sensing fiber, resulting in changes in the intensity, phase, and other parameters of the scattered light. The first scattered light generated after the first sensing fiber receives the first direct light will propagate along the fiber, enter through the second port of the first optical circulator, and be output to the first analysis module from the third port. After receiving the first scattered light, the first analysis module will perform a series of processing operations, such as filtering, amplification, and demodulation, to extract vibration-related information. By analyzing the changes in the intensity, phase, and other parameters of the scattered light, the vibration status of the optical cable containing the first sensing fiber can be obtained, and finally, the first vibration information is generated and provided to the waveform comparison module.The waveform comparison module compares the first vibration information and the second vibration information. When the first vibration information is greater than the second vibration information, the first sensing fiber corresponding to the first vibration information is identified as the sensing fiber inside the striking optical cable. When the second vibration information is greater than the first vibration information, the second sensing fiber corresponding to the second vibration information is identified as the sensing fiber inside the striking optical cable. The process and principle of generating the second vibration information are exactly the same as the process of generating the first vibration information, and will not be described again here.

[0024] It should be noted that when either of two adjacent optical cables is struck, the vibration causes a slight change in the physical properties of the sensing fiber within it, which in turn alters the characteristics of the scattered light generated as light propagates through the fiber. By collecting and processing the scattered light, primary or secondary vibration information reflecting the vibration status of the optical cable can be obtained.

[0025] Wherein, the first direct light emitting unit is a first laser, and the second direct light emitting unit is a second laser.

[0026] In a preferred embodiment, both the first analysis module and the second analysis module include a photoelectric conversion module, an analog-to-digital conversion module, a filtering module, and a control module. The photoelectric conversion module converts the first or second scattered light into an interference electrical signal and outputs it to the analog-to-digital conversion module. The analog-to-digital conversion module converts the interference electrical signal into an analog signal and outputs it to the filtering module. The filtering module filters the interference electrical signal to obtain a waveform signal and outputs the waveform signal to the control module. The control module analyzes the waveform signal using an intensity demodulation method to obtain vibration information and outputs it to the waveform comparison module. The waveform comparison module compares the waveforms of the two vibration information signals obtained simultaneously and records the results.

[0027] The system is based on the principle of light scattering and signal processing and analysis techniques. When light propagates in the sensing optical fiber, vibrations in the cable generate scattered light, which carries information about the vibrations of the surrounding environment. A photoelectric conversion module converts the optical signal into an electrical signal for subsequent digital processing and analysis. An analog-to-digital conversion module enables the signal to be recognized and processed by a computer or digital processing system. A filtering module removes noise from the signal, improving its quality and reliability. The control module uses intensity demodulation to analyze vibration information based on changes in the intensity of the interference electrical signal. Finally, a waveform comparison module compares the waveforms of two sets of vibration data to determine whether the struck end of the optical cable corresponds to the struck beginning.

[0028] To eliminate potential misjudgments due to differences or malfunctions in the characteristics of the first or second direct light emitting unit, a switching module is included. The first input terminal of the switching module is connected to the first direct light emitting unit, and the second input terminal is connected to the second direct light emitting unit. The first output terminal of the switching module is connected to the first port, and the second output terminal is connected to the fourth port. The switching module is used to selectively guide the first and second direct light to different optical paths. The switching module switches the optical paths, that is, the first direct light that originally entered the first distribution unit is redirected to the second distribution unit, and the second direct light that originally entered the second distribution unit is redirected to the first distribution unit. The steps of generating scattered light and acquiring vibration information are then repeated to obtain updated first and second vibration information. The waveform comparison module then compares these two sets of new vibration information again.

[0029] In a preferred embodiment, both the first analysis module and the second analysis module include a photoelectric conversion module, an analog-to-digital conversion module, a filtering module, and a control module. The photoelectric conversion module converts the first or second scattered light into an interference electrical signal and outputs it to the analog-to-digital conversion module. The analog-to-digital conversion module converts the interference electrical signal into an analog signal and outputs it to the filtering module. The filtering module filters the interference electrical signal to obtain a waveform signal and outputs the waveform signal to the control module. The control module analyzes the waveform signal using an intensity demodulation method to obtain vibration information and outputs it to the waveform comparison module. The waveform comparison module compares the waveforms of the two vibration information signals obtained simultaneously and records the results.

[0030] This application also provides a method for querying a target optical cable among adjacent optical cables. The system for querying a target optical cable among adjacent optical cables includes the following steps: S10. Select two adjacent optical cables, and arbitrarily select one sensing fiber from each of the two adjacent optical cables. These two sensing fibers are the first sensing fiber and the second sensing fiber, respectively. S20. Connect the first end of the first sensing fiber to the second port of the first optical circulator, and connect the first end of the second sensing fiber to the fourth port of the second optical circulator. S30. The operator initiates the above system in response; S40. A first direct-light emitting unit emits a first direct-light beam to a first sensing fiber. The first sensing fiber receives the first direct-light beam, generates first scattered light, and outputs it to a first analysis module. The first analysis module generates corresponding first waveform information based on the first scattered light and stores the first waveform information. The first analysis module is also used to respond to a recording signal generated when an operator presses a record button after knowing that a tapping action has occurred on the tail of any optical cable. Based on the currently changing first scattered light, it generates corresponding second waveform information, where the currently changing first scattered light refers to the first scattered light that vibrates due to the vibration of the sensing fiber caused by tapping the tail of any optical cable. The first analysis module compares the first waveform information with the second waveform information to obtain first vibration information and outputs it to a waveform comparison module. The module employs a second direct light emitting unit to emit a second direct light to a second sensing fiber. The second sensing fiber receives the second direct light and then emits a second scattered light to a second analysis module. The second analysis module generates and stores corresponding third waveform information based on the second scattered light. The second analysis module also responds to a recording signal generated when an operator presses a record button after knowing that the tail of any optical cable has been struck. Based on the currently changing second scattered light, it generates corresponding fourth waveform information, where the currently changing second scattered light refers to the second scattered light that vibrates due to the vibration of the sensing fiber caused by striking the tail of any optical cable. The second analysis module compares the third waveform information with the fourth waveform information to obtain second vibration information and outputs it to a waveform comparison module. S50. The waveform comparison module compares the waveforms of the first vibration information and the second vibration information and makes the first record. The sensing fiber corresponding to the information with stronger waveform is the sensing fiber inside the striking optical cable, thereby determining the head-to-tail correspondence between the two optical cables and accurately finding the target optical cable from the two adjacent optical cables.

[0031] It should be noted that when connecting this system to the optical cable: the operator sets the system for querying the target optical cable in the adjacent optical cable at the end of the cable, that is, at the end of the optical cable distribution frame. This optical cable distribution frame has multiple layers, each layer has multiple ports, and multiple sensing optical fibers in one optical cable are connected to the ports of each layer. Each sensing optical fiber has an identification tag. Select two adjacent optical cables from the optical cable distribution frame, and arbitrarily select one sensing optical fiber from each of them. Connect this system to the extra ports on the two layers of optical cable distribution frames connected to the two adjacent optical cables, so that the beginning ends of the two sensing optical fibers are connected to this system.

[0032] This method is based on the principle that light propagating in a sensing fiber encounters external interference (such as vibrations from striking the fiber optic cable) and generates scattered light. When the fiber optic cable is struck, the vibration of the sensing fiber alters the light propagation characteristics, thus generating scattered light carrying vibration information. The system transmits an optical signal to the sensing fiber through a direct light emitting unit, and the sensing fiber transmits the scattered light to the analysis module. The analysis module processes and analyzes the scattered light to extract the vibration information. Finally, the waveform comparison module compares the waveform intensity of the vibration information transmitted from different sensing fibers to determine which fiber optic cable was struck, thereby establishing the beginning-end correspondence of the fiber optic cables and identifying the target fiber optic cable.

[0033] The above steps accurately determine the head-to-tail correspondence between two adjacent optical cables. This is crucial for optical cable maintenance, management, and troubleshooting, helping staff clearly understand the cable layout and connections. It allows for the accurate identification of the target optical cable from two adjacent cables. In practical applications, when specific optical cables need to be operated or inspected, this method can quickly and accurately locate the target, improving work efficiency, reducing the possibility of misoperation, and ensuring the normal operation of the optical cable system.

[0034] Specifically, the steps for obtaining the first vibration information include: S111. The photoelectric conversion module in the first analysis module converts the interference optical signal of the first scattered light into an interference electrical signal, and outputs the interference electrical signal to the analog-to-digital conversion module in the first analysis module; S112. After receiving the interference electrical signal, the analog-to-digital conversion module in the first analysis module converts it into a digital signal and outputs it to the filtering module in the first analysis module; S113. After receiving the digital signal, the filtering module in the first analysis module performs filtering processing to obtain the filtered signal, and outputs it to the control module in the first analysis module. S114. After analyzing the filtered signal using the intensity demodulation method in the control module of the first analysis module, the first vibration information is obtained.

[0035] Specifically, the steps for obtaining the second vibration information include: S121. The photoelectric conversion module in the second analysis module converts the interference optical signal of the second scattered light into an interference electrical signal, and outputs the interference electrical signal to the analog-to-digital conversion module in the second analysis module; S122. After receiving the interference electrical signal, the analog-to-digital conversion module in the second analysis module converts it into a digital signal and outputs it to the filtering module in the second analysis module; S123. After receiving the digital signal, the filtering module in the second analysis module performs filtering processing to obtain the filtered signal, and outputs it to the control module in the first analysis module. S124. The intensity demodulation method in the control module of the second analysis module analyzes the filtered signal to obtain the second vibration information.

[0036] To eliminate potential misjudgments caused by differences in the inherent characteristics (malfunction) of the first or second direct-emitting light unit, the following verification steps are also included: S41. Connect the second direct light emitting unit to the first input terminal of the switching module, and connect the first direct light emitting unit to the second input terminal of the switching module; S42. Continue tapping the end of the same fiber optic cable; S43. The second direct light emitting unit emits a third direct light to the first port. The third direct light is output to the first sensing fiber through the second port. After receiving the third direct light, the first sensing fiber generates a third scattered light to the second port. The third scattered light is output to the first analysis module through the third port. The first analysis module receives and processes the third scattered light and compares it with the initial scattered light generated by the first sensing fiber in the state of no impact on the optical cable, to obtain third vibration information, and outputs it to the waveform comparison module. The first direct light emitting unit emits a fourth direct light to the fourth port. The fourth direct light is output to the second sensing fiber through the fifth port. After receiving the fourth direct light, the second sensing fiber generates a fourth scattered light to the fifth port. The fourth scattered light is output to the first analysis module through the sixth port. The second analysis module receives and processes the fourth scattered light and compares it with the initial scattered light generated by the second sensing fiber in the state of no impact on the optical cable, to obtain fourth vibration information, and outputs it to the waveform comparison module. S44. The waveform comparison module compares the waveforms of the third vibration information and the fourth vibration information and makes a second record. If the first record and the second record are inconsistent, it indicates that there is a fault in the first direct light emitting unit or the second direct light emitting unit. S45. Stop work, inspect, and troubleshoot.

[0037] Based on the first and second vibration information, i.e., after the first data recording, the second direct light emitting unit is connected to the first port, and the first direct light emitting unit is connected to the fourth port. The tail of the same cable used to obtain the first and second vibration information is tapped. Following the same working process described above, the third and fourth vibration information are generated and recorded as the second data record. The first and second data records are compared. If the first and second records are found to be inconsistent, it indicates that a direct light emitting unit is faulty. Work can be stopped to check and eliminate the fault, avoiding incorrect test results due to equipment failure and ensuring the smooth progress of subsequent optical cable-related work.

[0038] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions should all be covered within the scope of protection of the present invention.

Claims

1. A system for querying a target optical cable among adjacent optical cables, characterized in that, This system is used to connect to the beginning of any one of two adjacent optical cables, namely the first sensing fiber and the second sensing fiber. The tail of any one optical cable is tapped, and the vibration information from the first and second sensing fibers is used to determine the beginning-end correspondence of the optical cable to the sensing fiber, thereby identifying the target optical cable from the tails of the two adjacent optical cables. The system includes: a first direct-light emitting unit, a second direct-light emitting unit, a first optical circulator, a second optical circulator, a first analysis module, a second analysis module, and a waveform comparison module. The first direct-light emitting unit is connected to the first port of the first optical circulator, and the second port of the first optical circulator is connected to the first sensing fiber. The third port is connected to the first analysis module, which is connected to the waveform comparison module. The second direct light emitting unit is connected to the fourth port of the second optical circulator, the fifth port of the second optical circulator is connected to the second sensing fiber, and the sixth port of the second optical circulator is connected to the second analysis module. The second analysis module is connected to the waveform comparison module. In response to the operator starting the system, the first direct light emitting unit emits a first direct light to the first port. The first direct light is output to the first sensing fiber through the second port. After receiving the first direct light, the first sensing fiber generates a first scattered light to the second port. The first scattered light is continuously output through the third port. The first analysis module generates and stores corresponding first waveform information based on the first scattered light. The first analysis module is also used to respond to a recording signal generated when an operator presses a recording button after knowing that a tapping action has occurred on the tail of any optical cable. It generates corresponding second waveform information based on the currently changing first scattered light, where the currently changing first scattered light refers to the first scattered light that vibrates due to the vibration of the sensing fiber caused by tapping the tail of any optical cable. The first analysis module compares the first waveform information with the second waveform information to obtain first vibration information and provides the first vibration information to the waveform comparison module. The second direct light emitting unit emits second direct light to the fourth... The second direct light is output to the second sensing fiber through the fifth port. After receiving the second direct light, the second sensing fiber generates a second scattered light to the fifth port. The second scattered light is output to the second analysis module through the sixth port. The second analysis module generates a corresponding third waveform information based on the second scattered light and stores the third waveform information. The second analysis module is also used to respond to the recording signal generated when the operator knows that the action of tapping the tail of any optical cable has occurred and presses the record button. Based on the currently changing second scattered light, it generates a corresponding fourth waveform information. The currently changing second scattered light refers to the second scattered light that vibrates due to the vibration of the sensing fiber caused by tapping the tail of any optical cable.The second analysis module compares the third waveform information with the fourth waveform information to obtain the second vibration information, and provides the second vibration information to the waveform comparison module. The waveform comparison module compares the magnitudes of the first vibration information and the second vibration information. When the comparison shows that the first vibration information is greater than the second vibration information, the first sensing fiber corresponding to the first vibration information is identified as the sensing fiber within the impact cable. When the comparison shows that the second vibration information is greater than the first vibration information, the second sensing fiber corresponding to the second vibration information is identified as the sensing fiber within the impact cable.

2. The system for querying a target optical cable among adjacent optical cables according to claim 1, characterized in that, The first direct light emitting unit is a first laser, and the second direct light emitting unit is a second laser.

3. The system for querying a target optical cable among adjacent optical cables according to claim 1, characterized in that, Both the first and second analysis modules include a photoelectric conversion module, an analog-to-digital conversion module, a filtering module, and a control module. The photoelectric conversion module converts the first or second scattered light into an interference electrical signal and outputs it to the analog-to-digital conversion module. The analog-to-digital conversion module converts the interference electrical signal into an analog signal and outputs it to the filtering module. The filtering module filters the interference electrical signal to obtain a waveform signal and outputs the waveform signal to the control module. The control module analyzes the waveform signal using an intensity demodulation method to obtain the first vibration information and the second vibration information, and outputs the first vibration information and the second vibration information to the waveform comparison module. The waveform comparison module compares the waveforms of the first vibration information and the second vibration information obtained simultaneously.

4. The system for querying a target optical cable among adjacent optical cables according to claim 1, characterized in that, It also includes a switching module, wherein the first input terminal of the switching module is connected to the first direct light emitting unit, the second input terminal is connected to the second direct light emitting unit, the first output terminal of the switching module is connected to the first port, and the second output terminal is connected to the fourth port. The switching module is used to selectively guide the first direct light and the second direct light to different optical paths.

5. A method for querying a target optical cable among adjacent optical cables, characterized in that, The system for querying a target optical cable among adjacent optical cables according to any one of claims 1-4 includes the following steps: S10. Select two adjacent optical cables, and arbitrarily select one sensing fiber from each of the two adjacent optical cables. These two sensing fibers are the first sensing fiber and the second sensing fiber, respectively. S20. Connect the first end of the first sensing fiber to the second port of the first optical circulator, and connect the first end of the second sensing fiber to the fourth port of the second optical circulator. S30. The operator initiates the above system in response; S40. A first direct-light emitting unit emits a first direct-light beam to a first sensing fiber. The first sensing fiber receives the first direct-light beam, generates first scattered light, and outputs it to a first analysis module. The first analysis module generates corresponding first waveform information based on the first scattered light and stores the first waveform information. The first analysis module is also used to respond to a recording signal generated when an operator presses a record button after knowing that a tapping action has occurred on the tail of any optical cable. Based on the currently changing first scattered light, it generates corresponding second waveform information, where the currently changing first scattered light refers to the first scattered light that vibrates due to the vibration of the sensing fiber caused by tapping the tail of any optical cable. The first analysis module compares the first waveform information with the second waveform information to obtain first vibration information and outputs it to a waveform comparison module. The module employs a second direct light emitting unit to emit a second direct light to a second sensing fiber. The second sensing fiber receives the second direct light and then emits a second scattered light to a second analysis module. The second analysis module generates and stores corresponding third waveform information based on the second scattered light. The second analysis module also responds to a recording signal generated when an operator presses a record button after knowing that the tail of any optical cable has been struck. Based on the currently changing second scattered light, it generates corresponding fourth waveform information, where the currently changing second scattered light refers to the second scattered light that vibrates due to the vibration of the sensing fiber caused by striking the tail of any optical cable. The second analysis module compares the third waveform information with the fourth waveform information to obtain second vibration information and outputs it to a waveform comparison module. S50. The waveform comparison module compares the waveforms of the first vibration information and the second vibration information and makes the first record. The sensing fiber corresponding to the information with stronger waveform is the sensing fiber inside the striking optical cable, thereby determining the head-to-tail correspondence between the two optical cables and accurately finding the target optical cable from the two adjacent optical cables.

6. The method for querying a target optical cable among adjacent optical cables according to claim 5, characterized in that, The steps for obtaining the first vibration information include: S111. The photoelectric conversion module in the first analysis module converts the interference optical signal of the first scattered light into an interference electrical signal, and outputs the interference electrical signal to the analog-to-digital conversion module in the first analysis module; S112. After receiving the interference electrical signal, the analog-to-digital conversion module in the first analysis module converts it into a digital signal and outputs it to the filtering module in the first analysis module; S113. After receiving the digital signal, the filtering module in the first analysis module performs filtering processing to obtain the filtered signal, and outputs it to the control module in the first analysis module. S114. After analyzing the filtered signal using the intensity demodulation method in the control module of the first analysis module, the first vibration information is obtained.

7. The method for querying a target optical cable among adjacent optical cables according to claim 5, characterized in that, The steps for obtaining the second vibration information include: S121. The photoelectric conversion module in the second analysis module converts the interference optical signal of the second scattered light into an interference electrical signal, and outputs the interference electrical signal to the analog-to-digital conversion module in the second analysis module; S122. After receiving the interference electrical signal, the analog-to-digital conversion module in the second analysis module converts it into a digital signal and outputs it to the filtering module in the second analysis module; S123. After receiving the digital signal, the filtering module in the second analysis module performs filtering processing to obtain the filtered signal, and outputs it to the control module in the first analysis module. S124. The intensity demodulation method in the control module of the second analysis module analyzes the filtered signal to obtain the second vibration information.

8. The method for querying a target optical cable among adjacent optical cables according to claim 5, characterized in that, It also includes the following verification steps: S41. Connect the second direct light emitting unit to the first input terminal of the switching module, and connect the first direct light emitting unit to the second input terminal of the switching module; S42. Continue tapping the end of the same fiber optic cable; S43. The second direct light emitting unit emits a third direct light to the first port. The third direct light is output to the first sensing fiber through the second port. After receiving the third direct light, the first sensing fiber generates a third scattered light to the second port. The third scattered light is output to the first analysis module through the third port. The first analysis module receives and processes the third scattered light and compares it with the initial scattered light generated by the first sensing fiber in the state of no impact on the optical cable, to obtain third vibration information, and outputs it to the waveform comparison module. The first direct light emitting unit emits a fourth direct light to the fourth port. The fourth direct light is output to the second sensing fiber through the fifth port. After receiving the fourth direct light, the second sensing fiber generates a fourth scattered light to the fifth port. The fourth scattered light is output to the first analysis module through the sixth port. The second analysis module receives and processes the fourth scattered light and compares it with the initial scattered light generated by the second sensing fiber in the state of no impact on the optical cable, to obtain fourth vibration information, and outputs it to the waveform comparison module. S44. The waveform comparison module compares the waveforms of the third vibration information and the fourth vibration information and makes a second record. If the first record and the second record are inconsistent, it indicates that there is a fault in the first direct light emitting unit or the second direct light emitting unit. S45. Stop work, inspect, and troubleshoot.

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