A fiber quality monitoring system based on double-device cooperative diagnosis

Abstract

The utility model discloses a kind of optical fiber quality monitoring systems based on double equipment collaborative diagnosis, including cable monitoring device and cable fault location device, cable monitoring device is as independent multichannel optical fiber online monitoring equipment to carry out routine optical fiber fault monitoring, to monitor the quality of all access optical fiber in real time;When some or several optical fibers appear fault and need to carry out high-precision fault diagnosis, cable fault location device can be used to send control instruction to cable monitoring device to control switch its optical input interface of light opening light, to switch the working mode of cable monitoring device from conventional monitoring mode to fault location mode, under fault location mode, the output interface of cable fault location device can be directly connected to any one optical fiber through cable monitoring device, realize fault accurate positioning.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber fault diagnosis technology, and in particular to an optical fiber quality monitoring system based on dual-device collaborative diagnosis. Background Technology

[0002] In the monitoring of underground optical cable networks in large cities, multi-channel online OTDR devices or independent portable optical cable fault locators are typically used for fault location. Multi-channel online OTDR devices are fixed deployment devices. In order to achieve the effect of multi-channel monitoring, they sacrifice positioning accuracy, which is usually 5-10 meters. The fault can only be located in "a certain 10-meter section". They cannot identify minor vibration interference or perform route calibration, and require the excavation of a large area of ​​road surface. While independent portable fiber optic cable fault locators are mobile diagnostic devices that can accurately locate faults, they require manual plugging and unplugging of fiber optic patch cords to connect to the target fiber optic cable during testing. Furthermore, because they lack expansion channels, they can only test one fiber optic cable at a time, making it impossible to cover fiber optic testing in large networks. For example, for a large fiber optic cable network with 48 fiber optic cables, it would require repeated plugging and unplugging 48 times, taking an average of about 30 minutes to complete the testing of each of the 48 fiber optic cables, which seriously affects the efficiency of emergency repairs. Summary of the Invention

[0003] In view of this, the present invention provides an optical fiber quality monitoring system based on dual-device collaborative diagnosis to solve the problems of poor fault location accuracy of traditional multi-channel online OTDR devices and low fault location efficiency of independent portable optical cable fault locators for large optical cable networks.

[0004] A fiber optic quality monitoring system based on dual-device collaborative diagnosis includes an optical cable monitoring device and an optical cable fault location device. The optical cable monitoring device is equipped with an OTDR module and 2×n optical switches. The housing panel of the optical cable monitoring device is provided with a first USB communication interface, an external optical input interface, and n optical output interfaces for connecting external optical fibers. The OTDR module is connected to the first USB communication interface and the monitoring interface of the 2×n optical switches respectively. The detection interface of the 2×n optical switches is connected to the external optical input interface. The n output terminals of the 2×n optical switches are connected to the corresponding n optical output interfaces respectively. The housing panel of the optical cable fault location device is provided with a second USB communication interface and an external optical output interface. The internal part of the optical cable fault location device is provided with a distributed optical fiber vibration sensing unit. The second USB communication interface and the external optical output interface are both connected to the distributed optical fiber vibration sensing unit. The first USB communication interface of the optical cable monitoring device is connected to the second USB communication interface of the optical cable fault location device via a data cable, and the external optical input interface of the optical cable monitoring device is connected to the external optical output interface of the optical cable fault location device via an optical fiber patch cord.

[0005] Preferably, multiple optical cable monitoring devices are provided, and one optical cable fault location device is provided. The optical cable fault location device has multiple second USB communication interfaces and multiple external optical output interfaces. The first USB communication interface of each optical cable monitoring device is connected to one of the second USB communication interfaces of the optical cable fault location device through a data cable, and the external optical input interface of each optical cable monitoring device is connected to one of the external optical output interfaces of the optical cable fault location device through an optical fiber patch cord.

[0006] Preferably, the optical cable fault location device is equipped with a USB hub. The slave interface of the USB hub serves as the second USB communication interface, and the master interface is connected to the distributed optical fiber vibration sensing unit inside it. The optical signal output port of the distributed optical fiber vibration sensing unit is connected to each external optical output interface through a beam splitter.

[0007] Preferably, the number of the second USB communication interface and the external optical output interface on the optical cable fault location device is not less than the number of optical cable monitoring devices connected to the optical cable fault location device.

[0008] Preferably, the OTDR module includes at least one light source, a WDM module connected to the light source, a coupler connected to the signal output terminal of the WDM module, a photoelectric detection module connected to one of the output terminals of the coupler, a data acquisition module connected to the signal output terminal of the photoelectric detection module, and a main control module connected to the signal output terminal of the data acquisition module. The other output terminal of the coupler is connected to the monitoring interface of the 2×n optical switch. The control signal output terminal of the main control module is connected to the control terminals of the light source and the 2×n optical switch, respectively. The communication port of the main control module is connected to the first USB communication interface.

[0009] Preferably, the external optical input interface of the optical cable monitoring device can also be connected to other devices or modules with optical signal output functions.

[0010] The beneficial effects of this utility model are: 1. The fiber optic quality monitoring system of this application includes a fiber optic cable monitoring device and a fiber optic cable fault location device. The fiber optic cable monitoring device, as an independent multi-channel online fiber optic monitoring device, performs routine fiber optic fault monitoring to monitor the quality of all access fibers in real time. When a fault occurs in one or more fibers and high-precision fault diagnosis is required, the fiber optic cable fault location device can send a control command to the fiber optic cable monitoring device to control the switching of its optical input interface, thereby switching the working mode of the fiber optic cable monitoring device from the routine monitoring mode to the fault location mode. In the fault location mode, the output interface of the fiber optic cable fault location device can be directly connected to any fiber through the fiber optic cable monitoring device to achieve accurate fault location.

[0011] 2. The optical cable monitoring device of this application is responsible for real-time online monitoring of multi-channel optical fibers under normal conditions. Once a fault is detected, an alarm is immediately triggered. The optical cable monitoring device switches to an extended multi-channel device mode controlled by the optical cable fault location device. The optical cable fault location device utilizes its built-in distributed optical fiber vibration sensing system (DVS) and high-precision fault location algorithm, combined with the multi-channel extension capability of the optical cable monitoring device, to achieve comprehensive and accurate diagnosis of the optical fiber network, thus solving the problem of the separation between monitoring and diagnosis in traditional products.

[0012] 3. Under normal conditions, the optical cable monitoring device of this application performs real-time online monitoring of multi-channel optical fibers according to preset monitoring parameters and frequencies. Once an optical fiber fault is detected, its internal resources are reconfigured and control is handed over to the optical cable fault location device, ensuring that the entire system can operate efficiently in different modes according to actual operation and maintenance needs, thereby improving the system's flexibility and adaptability.

[0013] 4. When performing optical cable route calibration or fault location, this application can quickly switch the detection beam to the target optical fiber channel, greatly improving the efficiency of operation and maintenance. Compared with traditional channel-by-channel detection or manual switching, the efficiency is improved by several times or even tens of times. Moreover, it has extremely high sensitivity in detecting large attenuation points, small reflection events, and judging external interference (such as construction damage, external force compression) along the optical cable. In the complex environment of urban underground pipe network, it can accurately identify the direction of the optical cable and the location of potential external threats. Compared with traditional products, it significantly improves the accuracy of fault diagnosis and the ability to predict potential hazards.

[0014] 5. The first and second USB communication interfaces can be used to quickly establish a connection between the optical cable monitoring device and the optical cable fault location device. This not only allows for the transmission of control signals to achieve precise control of the optical switch, but also enables the optical cable fault location device to obtain the optical fiber status of the optical cable monitoring device in real time for in-depth analysis and diagnosis. At the same time, the universality of the USB interface makes it easier to expand other functional modules (upgrade algorithm modules, new sensor modules) on the optical cable monitoring device in the future, reducing the difficulty and cost of system expansion.

[0015] 6. The external optical input interface of the optical cable monitoring device can serve as the optical signal access interface for the optical cable fault location device, thereby expanding the fault diagnosis function. In the future, this interface can also connect to other devices or modules with optical signal output functions, such as new optical fiber amplifiers and special optical fiber sensors, to further enrich the functions of the optical cable monitoring device and meet the ever-evolving needs of optical fiber network operation and maintenance without requiring large-scale modifications to the overall structure of the equipment.

[0016] 7. The optical switch of the optical cable monitoring device can also achieve rapid switching of its n optical fiber channels under the coordinated control of the optical cable fault location device to perform polling monitoring. Compared with the independent portable optical cable fault location instrument that can only detect one optical fiber at a time, the detection efficiency is improved by 6 times. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the fiber optic quality monitoring system in Example 1.

[0019] Figure 2 This is a block diagram of the optical cable monitoring device.

[0020] Figure 3 This is a schematic diagram of the optical cable fault location device.

[0021] The meanings of the labels in the diagram are as follows: 1 is an optical cable monitoring device, and 2 is an optical cable fault location device. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the present utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0023] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0024] It should be understood that although the terms first, second, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms and should not be construed as indicating or implying relative importance. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0025] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrating this invention and has no specific meaning in itself. Therefore, "module" and "part" can be used interchangeably.

[0026] To better understand the technical solution of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings.

[0027] This invention provides an optical fiber quality monitoring system based on dual-device collaborative diagnosis, including an optical cable monitoring device 1 and an optical cable fault location device 2. The optical cable monitoring device 1 acts as an independent multi-channel online optical fiber monitoring device to perform conventional optical fiber fault monitoring, thereby monitoring the quality of all connected optical fibers in real time. When one or more optical fibers fail and require high-precision fault diagnosis, the optical cable fault location device 2 can send control commands to the optical cable monitoring device 1 to control the switching of its optical input interface, thereby switching the working mode of the optical cable monitoring device 1 from conventional monitoring mode to fault location mode. In fault location mode, the output interface of the optical cable fault location device 2 can be directly connected to any optical fiber through the optical cable monitoring device 1 to achieve accurate fault location.

[0028] Example 1: The fiber optic quality monitoring system based on dual-device collaborative diagnosis in this example includes an optical cable monitoring device 1 and an optical cable fault location device 2, such as... Figure 1 As shown.

[0029] Specifically, the optical cable monitoring device 1 internally includes an OTDR module and a 2×n optical switch. The housing panel of the optical cable monitoring device 1 has a first USB communication interface, an external optical input interface, and n optical output interfaces for connecting to external optical fibers. The n optical output interfaces can be located on one of the housing panels of the optical cable monitoring device 1, while the first USB communication interface and the external optical input interface can be located on the other housing panel. The OTDR module is connected to the first USB communication interface and the monitoring interface of the 2×n optical switch, respectively. The detection interface of the 2×n optical switch is connected to the external optical input interface, and the n output terminals of the 2×n optical switch are connected to their respective n optical output interfaces.

[0030] like Figure 2 As shown, the OTDR module includes at least one light source, a WDM module connected to the light source, a coupler connected to the signal output terminal of the WDM module, a photoelectric detection module connected to one of the output terminals of the coupler, a data acquisition module connected to the signal output terminal of the photoelectric detection module, and a main control module connected to the signal output terminal of the data acquisition module. The other output terminal of the coupler is connected to the monitoring interface of the 2×n optical switch. The control signal output terminal of the main control module is connected to the control terminals of the light source and the 2×n optical switch, respectively. The communication port of the main control module is connected to the first USB communication interface.

[0031] In this embodiment, the OTDR module includes two light sources: a first light source with an optical signal wavelength of 1310nm and a second light source with an optical signal wavelength of 1550nm. The output terminals of both the first and second light sources are connected to the WDM module. When the optical cable monitoring device is in normal monitoring mode, the light beam emitted by the first or second light source enters the coupler through the WDM module. The coupler splits the light beam into two parts. Most of the light beam enters each optical fiber through the monitoring interface of the 2×n optical switch, and a small portion of the light beam enters the photoelectric detection module. The photoelectric detection module converts the optical signal into an electrical signal and transmits it to the data acquisition module. The data acquisition module processes the received signal to read the voltage value and then calculates the optical power. When a fault such as a break occurs in a certain optical fiber, Rayleigh backscattered light and Fresnel reflected light are generated in that optical fiber. The reflected light returns along the original path, enters the photoelectric detection module through the 2×n optical switch and coupler, and is converted into an electrical signal and transmitted to the data acquisition module. The data acquisition module records the curve of the reflected light intensity changing over time (i.e., the OTDR curve, which is also called optical attenuation data) and transmits the optical attenuation data to the main control module. The main control module compares the data with the reference curve or threshold to determine whether a fault has occurred and generates a warning message. When the optical cable monitoring device 1 is in fault location mode, the aforementioned OTDR module automatically stops working, and the optical input port of the 2×n optical switch switches from its monitoring interface to its detection interface, so that the detection beam emitted by the optical cable fault location device 2 can be transmitted to the optical cable monitoring device 1 through the optical cable fault location device 2, so as to directly transmit to any optical fiber and achieve accurate fault location.

[0032] The optical cable fault location device 2 has a second USB communication interface and an external optical output interface on its housing panel. The optical cable fault location device 2 has a distributed optical fiber vibration sensing unit inside, and the second USB communication interface and the external optical output interface are both connected to the distributed optical fiber vibration sensing unit.

[0033] The first USB communication interface of the optical cable monitoring device 1 is connected to the second USB communication interface of the optical cable fault location device 2 via a data cable, and the external optical input interface of the optical cable monitoring device 1 is connected to the external optical output interface of the optical cable fault location device 2 via an optical fiber patch cord.

[0034] Thus, when the optical cable monitoring device 1 detects a fault in one or more optical fibers, its main control module transmits the optical cable fault data (i.e., optical attenuation data) to the optical cable fault location device 2 via the first USB communication interface. Upon receiving the data, the optical cable fault location device 2 automatically triggers the activation of its distributed optical fiber vibration sensing unit. Simultaneously, the optical cable fault location device 2 sends an optical channel switching command to the optical cable monitoring device 1 via its second USB communication interface. After receiving the optical channel switching command, the first USB communication interface of the optical cable monitoring device 1 transmits the optical channel switching command to the main control module. The main control module controls the switching of the optical input source of the 2×n optical switch from its monitoring interface to its detection interface (i.e., the detection interface of the 2×n optical switch is connected to the external optical input interface). Then, the distributed optical fiber vibration sensing unit of the optical cable fault location device 2 emits a detection beam, which is transmitted to the external optical input interface of the optical cable monitoring device 1 via its external optical output interface, and then to the 2×n optical switch, and finally to the faulty optical fiber for fault location.

[0035] When performing optical cable routing calibration or fault location, the above system can quickly switch the detection beam to the target optical fiber channel, which greatly improves the efficiency of operation and maintenance. Compared with traditional channel-by-channel detection or manual switching, the efficiency is improved by several times or even tens of times.

[0036] The main control module mentioned above uses the STM32H743VI chip.

[0037] Both the first and second USB communication interfaces mentioned above use USB-C interfaces with USB 3.2 Gen2 specifications, supporting 10Gbps transmission. This interface has advantages such as high-speed data transmission, strong power supply capability, and compact size. Using the first and second USB communication interfaces, the optical cable monitoring device and the optical cable fault location device 2 can be quickly connected. This not only allows the transmission of control signals to achieve precise control of the optical switch, but also enables the optical cable fault location device 2 to obtain the optical fiber status of the optical cable monitoring device in real time for in-depth analysis and diagnosis. At the same time, the universality of the USB interface makes it easier to expand other functional modules (upgrade algorithm modules, new sensor modules) on the optical cable monitoring device 1 in the future, reducing the difficulty and cost of system expansion.

[0038] The external optical input interface of the optical cable monitoring device 1 can serve as the optical signal access interface of the optical cable fault location device 2 to expand the fault diagnosis function. In the future, this interface can also connect to other devices or modules with optical signal output functions, such as new optical fiber amplifiers and special optical fiber sensors, to further enrich the functions of the optical cable monitoring device 1 and meet the ever-evolving needs of optical fiber network operation and maintenance without requiring large-scale modifications to the overall structure of the equipment.

[0039] The optical switch of the aforementioned optical cable monitoring device 1 can also achieve rapid switching of its n optical fiber channels under the coordinated control of the optical cable fault location device to perform polling monitoring. For a large optical fiber network with 48 optical fibers, this application can complete the polling detection of 48 optical fibers within 5 minutes through the coordinated cooperation of the optical cable monitoring device 1 and the optical cable fault location device 2. Compared with the independent portable optical cable fault location device, which can only detect 1 optical fiber at a time, the detection efficiency is improved by 6 times (the independent portable optical cable fault location device needs to be repeatedly plugged and unplugged 48 times to detect 48 optical fibers, which takes about 30 minutes in total).

[0040] The method for monitoring fiber optic quality using the aforementioned fiber optic quality monitoring system specifically includes the following steps: S1, connect the optical cable monitoring device 1 to the optical cable fault location device 2, wherein the first USB communication interface of the optical cable monitoring device 1 is connected to one of the second USB communication interfaces of the optical cable fault location device 2 via a data cable, and the external optical input interface of the optical cable monitoring device 1 is connected to one of the external optical output interfaces of the optical cable fault location device 2 via an optical fiber patch cord.

[0041] S2, the optical cable fault location device 2 identifies the device type of the optical cable monitoring device 1, and assigns it a data transmission bandwidth and a unique address code according to the device type of the optical cable monitoring device 1.

[0042] S3, the optical cable monitoring device 1 in the optical fiber network starts the normal monitoring mode and uses its OTDR module to monitor the faults of all optical fibers within the monitoring range. Upon detecting an anomaly, the optical cable monitoring device 1 transmits the optical cable fault data to the optical cable fault location device 2. Upon receiving the data, the optical cable fault location device 2 automatically activates its distributed optical fiber vibration sensing unit and simultaneously sends an optical channel switching command to the optical cable monitoring device 1 via its second USB communication interface. After receiving the optical channel switching command, the first USB communication interface of the optical cable monitoring device 1 transmits the command to the main control module. The main control module controls the switching of the optical input source of the 2×n optical switch from its monitoring interface to its detection interface (i.e., the detection interface of the 2×n optical switch is connected to the external optical input interface). Then, the distributed optical fiber vibration sensing unit of the optical cable fault location device 2 emits a detection beam, which is transmitted through its external optical output interface to the external optical input interface of the optical cable monitoring device 1. From there, it is transmitted to the 2×n optical switch and ultimately to the faulty optical fiber for fault location.

[0043] S4, the optical cable monitoring device 1 transmits the fault location data to the optical cable fault location device 2 in real time through its first USB communication interface. The optical cable fault location device 2 determines the fault location based on the received fault location data and optical cable fault data.

[0044] The optical cable monitoring device of this application adopts a 2×n optical switch. One of its optical input ports is connected to the output of its own OTDR module for daily real-time monitoring of multi-channel optical fibers. The other optical input port is connected to the external optical input interface on its housing panel. This design allows the optical cable monitoring device 1 to independently undertake the real-time status monitoring of n optical fibers, and when an optical fiber fails, it can be connected to the corresponding interface of the optical cable fault location device 2 through its first USB communication interface and external optical input interface to become a multi-channel extension platform of the optical cable fault location device 2. The optical cable fault location device 2 can directly inject high-precision detection signals into the 2×n optical switch to perform in-depth diagnosis. When facing abnormal optical fiber attenuation, there is no need to cumbersomely disassemble the line and reconnect the detection equipment, which greatly improves the convenience and efficiency of operation and maintenance.

[0045] Example 2: The fiber optic quality monitoring system based on dual-device collaborative diagnosis in this example includes multiple optical cable monitoring devices 1 and one optical cable fault location device 2.

[0046] The structure of each optical cable monitoring device 1 is as described in Embodiment 1 above, and will not be repeated here.

[0047] like Figure 3As shown, the housing panel of the optical cable fault location device 2 is equipped with multiple second USB communication interfaces and multiple external optical output interfaces. The optical cable fault location device 1 contains a distributed optical fiber vibration sensing unit. The multiple second USB communication interfaces are directly connected to the communication interface of the distributed optical fiber vibration sensing unit, and the multiple external optical output interfaces are connected to the optical signal output port of the distributed optical fiber vibration sensing unit through a beam splitter.

[0048] In other preferred embodiments, a USB hub can be provided in the optical cable fault location device 2. The slave interface of the USB hub is used as the second USB communication interface, and the master interface is connected to the distributed optical fiber vibration sensing unit inside it. The optical signal output port of the distributed optical fiber vibration sensing unit is connected to each external optical output interface through a beam splitter.

[0049] When connecting multiple optical cable monitoring devices 1 to optical cable fault location device 2, the first USB communication interface of each optical cable monitoring device 1 is connected to one of the second USB communication interfaces of optical cable fault location device 2 via a data cable, and the external optical input interface of each optical cable monitoring device 1 is connected to one of the external optical output interfaces of optical cable fault location device 2 via an optical fiber patch cord.

[0050] Preferably, the number of the second USB communication interface and the external optical output interface on the optical cable fault location device 2 is not less than the number of optical cable monitoring devices 1 connected to the optical cable fault location device 2.

[0051] When multiple optical cable monitoring devices 1 are connected to optical cable fault location devices 2, a hybrid topology of "tree + bus" can be formed with optical cable fault location devices 2 as the centralized diagnostic core.

[0052] Multiple optical cable monitoring devices 1 can be deployed in different monitoring areas (such as the equipment room in area A and the trunk node in area B), and connected to the optical cable fault location device through an independent USB-C data cable (supporting a length of 10 meters and compatible with industrial-grade shielded cables) to ensure signal stability in complex environments.

[0053] The optical cable monitoring devices can also communicate with each other through the optical cable fault location device 2. For example, the optical cable monitoring device 1 located in the equipment room of area A can share the fault data it monitors with the optical cable monitoring device located in the trunk node of area B without the need to deploy a dedicated communication link.

[0054] When multiple optical cable monitoring devices 1 are connected to the optical cable fault location device 2, the optical cable fault location device 2 can assign a unique physical address code to each connected optical cable monitoring device 1 and bind its respective address code to its deployment area. The address code is automatically written into the main control module of the optical cable monitoring device 1 through the second USB communication interface and the first USB communication interface. At the same time, the optical cable fault location device 2 can also allocate data transmission bandwidth to each optical cable monitoring device 1 according to its "device descriptor" to ensure that the real-time monitoring data of each optical cable monitoring device 1 can be transmitted to the optical cable fault location device in a timely manner, avoid bandwidth contention among multiple optical cable monitoring devices 1, and ensure that the delay between diagnostic commands and fault data transmission is <5ms.

[0055] Each optical fiber monitoring device 1 is responsible for monitoring optical fibers within its jurisdiction. For example, the optical fiber monitoring device with address code 1 is responsible for optical fibers 1-12, and the optical fiber monitoring device with address code 2 is responsible for optical fibers 13-24. When a fiber optic monitoring device 1 detects a fault in one or more fiber optic cables, it transmits the fault data to the fiber optic fault location device 2 via its first USB communication interface (the fault data is encapsulated in JSON format, with a single frame size ≤ 1KB). Upon receiving the fault data, the fiber optic fault location device 2 immediately prioritizes the task of the monitoring device 1 and sends it a control command to "pause routine monitoring and switch to fault location mode." Simultaneously, it sends control commands to other monitoring devices to "maintain routine monitoring and synchronously upload data from surrounding fiber optic channels," thus preventing system-wide task interruption. For example, if the monitoring device with address code 1 detects a break in the 12th fiber optic cable, the fault location device 2 will immediately transmit the fault data (including the fault channel, location, attenuation curve, etc.) synchronously to the monitoring device with address code 2 and send a control command to the monitoring device with address code 2 to "warning of a break in the 12th fiber optic cable, synchronously monitor adjacent fiber optic channels 11-13," thereby achieving "fault-related monitoring."

[0056] After the fault location is completed, the optical cable fault location device 2 summarizes the monitoring data of all optical cable monitoring devices 1 and generates a "full-link fault report", which includes a heat map of fault distribution in each area, statistics of fault types (percentage of breakpoints, percentage of abnormal attenuation), and repair priority ranking. It supports exporting to mobile terminals (such as tablets of maintenance personnel) via USB-C interface.

[0057] The method for monitoring fiber optic quality using the aforementioned fiber optic quality monitoring system specifically includes the following steps: S1, connect all optical cable monitoring devices 1 in the optical fiber network to optical cable fault location devices 2.

[0058] S2, the optical cable fault location device 2 allocates data transmission bandwidth and unique address code to each optical cable monitoring device 1 according to the equipment type of each optical cable monitoring device 1.

[0059] S3, each optical cable monitoring device 1 starts the normal monitoring mode, uses its OTDR module to monitor all optical fibers within its respective monitoring range for faults, and transmits its respective monitoring data to the optical cable fault location device in real time. When one of the optical cable monitoring devices detects an abnormality, the optical cable fault location device 2 automatically activates its distributed optical fiber vibration sensing unit after receiving the optical cable fault data, and sends an optical channel switching command to the optical cable monitoring device through its second USB communication interface to locate the fault (the specific implementation method of sending the optical channel switching command to the optical cable monitoring device for fault location is the same as in Embodiment 1, and will not be described in detail here); at the same time, the optical cable fault location device 2 sends a fault association monitoring command to other optical cable monitoring devices so that the other optical cable monitoring devices can simultaneously monitor the optical fibers adjacent to the faulty optical fiber. When multiple optical cable monitoring devices detect an abnormality simultaneously, the optical cable fault location device 2 automatically activates its distributed optical fiber vibration sensing unit based on the received optical cable fault data. The distributed optical fiber vibration sensing unit processes the optical cable fault data to determine the fault type detected by each of the multiple optical cable monitoring devices, and sends optical channel switching commands to the corresponding optical cable monitoring devices sequentially through its second USB communication interface to locate the fault according to the fault priority. At the same time, the optical cable fault location device 2 sends fault association monitoring commands to other optical cable monitoring devices that have not detected faults, so that other optical cable monitoring devices can synchronously monitor the optical fibers adjacent to the faulty optical fiber.

[0060] S4, the optical cable monitoring device 1 transmits the fault location data to the optical cable fault location device in real time through its first USB communication interface. Other optical cable monitoring settings pages simultaneously upload the monitoring data of the optical fibers adjacent to the faulty optical fiber to assist in the correlation analysis of the fault. The optical cable fault location device 2 determines the fault location based on the received fault location data and optical cable fault data.

[0061] S5. After the fault location is completed, the optical cable fault location device 2 summarizes the monitoring and detection data of all optical cable monitoring devices 1 and generates a "full-link fault report", which includes a heat map of fault distribution in each area, statistics of fault types (proportion of breakpoints, proportion of attenuation abnormalities), and repair priority ranking. It supports exporting to mobile terminals (such as tablets of maintenance personnel) via USB-C interface. The entire collaborative process takes no more than 10 minutes.

[0062] It should be understood that the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A fiber optic quality monitoring system based on dual-device collaborative diagnosis, characterized in that, Includes optical cable monitoring devices and optical cable fault location devices; The optical cable monitoring device is equipped with an OTDR module and 2×n optical switches. The housing panel of the optical cable monitoring device is provided with a first USB communication interface, an external optical input interface, and n optical output interfaces for connecting external optical fibers. The OTDR module is connected to the first USB communication interface and the monitoring interface of the 2×n optical switches respectively. The detection interface of the 2×n optical switches is connected to the external optical input interface. The n output terminals of the 2×n optical switches are connected to the corresponding n optical output interfaces respectively. The housing panel of the optical cable fault location device is provided with a second USB communication interface and an external optical output interface. The internal part of the optical cable fault location device is provided with a distributed optical fiber vibration sensing unit. The second USB communication interface and the external optical output interface are both connected to the distributed optical fiber vibration sensing unit. The first USB communication interface of the optical cable monitoring device is connected to the second USB communication interface of the optical cable fault location device via a data cable, and the external optical input interface of the optical cable monitoring device is connected to the external optical output interface of the optical cable fault location device via an optical fiber patch cord.

2. The fiber optic quality monitoring system based on dual-device collaborative diagnosis according to claim 1, characterized in that, The optical cable monitoring device is provided in multiple units, and the optical cable fault location device is provided in one unit. The optical cable fault location device has multiple second USB communication interfaces and multiple external optical output interfaces. The first USB communication interface of each optical cable monitoring device is connected to one of the second USB communication interfaces of the optical cable fault location device through a data cable. The external optical input interface of each optical cable monitoring device is connected to one of the external optical output interfaces of the optical cable fault location device through an optical fiber patch cord.

3. The fiber optic quality monitoring system based on dual-device collaborative diagnosis according to claim 2, characterized in that, The optical cable fault location device is equipped with a USB hub. The slave interface of the USB hub serves as the second USB communication interface, and the master interface is connected to the distributed optical fiber vibration sensing unit inside it. The optical signal output port of the distributed optical fiber vibration sensing unit is connected to each external optical output interface through a beam splitter.

4. The fiber optic quality monitoring system based on dual-device collaborative diagnosis according to claim 2, characterized in that, The number of the second USB communication interface and the external optical output interface on the optical cable fault location device is not less than the number of optical cable monitoring devices connected to the optical cable fault location device.

5. The fiber optic quality monitoring system based on dual-device collaborative diagnosis according to claim 1, characterized in that, The OTDR module includes at least one light source, a WDM module connected to the light source, a coupler connected to the signal output terminal of the WDM module, a photoelectric detection module connected to one of the output terminals of the coupler, a data acquisition module connected to the signal output terminal of the photoelectric detection module, and a main control module connected to the signal output terminal of the data acquisition module. The other output terminal of the coupler is connected to the monitoring interface of the 2×n optical switch. The control signal output terminal of the main control module is connected to the control terminals of the light source and the 2×n optical switch, respectively. The communication port of the main control module is connected to the first USB communication interface.

6. The fiber optic quality monitoring system based on dual-device collaborative diagnosis according to claim 1, characterized in that, The external optical input interface of the optical cable monitoring device can also be connected to other devices or modules with optical signal output functions.

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