A distribution network fiber splitting device and method based on a fusion-free optical distribution box

Abstract

The present application relates to the technical field of power distribution network optical fiber communication, and particularly relates to a distribution network fiber splitting device and method based on a fusion-free optical distribution box, which comprises a fusion-free optical distribution box main body, a pre-terminated fiber splitting assembly, a splitter unit, a monitoring interface unit and an electronic tag assembly integrated in the interior of the fusion-free optical distribution box main body; the fusion-free optical distribution box main body is provided with a wire inlet, a wire outlet and an internal fixing support, the wire inlet and the wire outlet are provided with sealing structures, and the internal fixing support fixes the pre-terminated fiber splitting assembly and the splitter unit; the pre-terminated fiber splitting assembly comprises a trunk access unit, a branch output unit, a jumper connection unit, an expansion interface unit and a monitoring reserved unit. The present application realizes plug and play, real-time fault positioning, system flexible expansion, improves efficiency and reliability, and reduces cost and risk by means of the prefabricated fusion-free optical distribution box, the pre-terminated assembly, the online monitoring and distributed module and the expansion reserved unit, and integrates multiple interfaces and combines multiple technologies.

Description

Technical Field

[0001] This invention relates to the field of optical fiber communication technology for power distribution networks, and in particular to a fiber distribution device and method based on a fusion splice-free optical distribution box. Background Technology

[0002] With the increasing demand for new power system construction and urban infrastructure upgrades, fiber optic communication technology in power distribution networks is gradually developing towards large-scale and intelligent applications. In recent years, to meet the reliability and stability requirements of urban power supply, relevant plans have promoted the construction of urban fiber optic private networks, aiming to achieve full coverage of power communication networks in key areas through large-scale fiber optic deployment and communication equipment deployment. In this process, traditional distribution network fiber splitting technology mainly relies on on-site splicing operations, manually terminating optical cables and connecting them to equipment. This has gradually formed a fiber splitting model centered on on-site construction, widely used in power information collection and transmission in smart communities, urban utility tunnels, and other scenarios.

[0003] However, existing technologies have gradually revealed several shortcomings in practical applications. During construction, on-site fiber splicing requires specialized equipment and technicians, is significantly affected by environmental factors, and exhibits large differences in fiber splitting efficiency across different scenarios, leading to extended construction periods and increased costs. During operation and maintenance, splice points are prone to aging, and fault location relies on manual point-by-point inspection, resulting in long fault recovery times and impacting distribution network stability. Facing complex operating environments such as humidity, corrosion, and high temperatures, traditional optical cable materials have weak anti-interference capabilities, posing safety hazards. Simultaneously, resource management relies on manual recording, lacking visualization and digitalization methods, leading to low efficiency and inaccuracy in resource inventory, making it difficult to meet the construction needs of large-scale fiber optic private networks. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned problems and provide a fiber distribution device and method based on a non-fusion splicing optical distribution box. To achieve the above objective, this invention adopts the following technical solution: A fiber distribution network distribution device based on a splice-free optical distribution box includes a splice-free optical distribution box body and pre-terminated fiber distribution components, a splitter unit, a monitoring interface unit, and an electronic tag component integrated inside the splice-free optical distribution box body. The splice-free optical distribution box body is made of flame-retardant material and has an inlet, an outlet, and an internal fixing bracket. The inlet and outlet are equipped with a sealing structure. The internal fixing bracket fixes the pre-terminated fiber distribution components and the splitter unit. The pre-terminated fiber distribution components include a trunk access unit, a branch output unit, a jumper connection unit, an expansion interface unit, and a monitoring reserved unit. The trunk access unit is connected to the input end of the splitter unit through the jumper connection unit. The output end of the splitter unit is connected to the branch output unit. The expansion interface unit is connected to the trunk access unit. The monitoring reserved unit is located between the trunk access unit and the splitter unit. The monitoring interface unit is connected to the trunk access unit.

[0005] Furthermore, the flame-retardant material of the non-fusion-bonded optical distribution box is ABS material, with dimensions of 400mm×300mm×150mm. The sealing structure is a waterproof sealing ring. The internal fixing bracket includes an optical cable fixing groove and a residual fiber storage tray. The electronic tag component is an NFC chip or an RFID chip, which is placed near the inlet.

[0006] Furthermore, the backbone access unit includes a 24-core MPO adapter. The insertion loss of the 24-core MPO adapter is ≤0.5dB, and the return loss is ≥50dB. The 24-core MPO adapter is used to connect to a 24-core master control optical cable. The 24-core master control optical cable includes 22 communication cores and 2 spare cores. The plug assembly of the 24-core MPO adapter is of type PP or PC, and the socket assembly is of type SC.

[0007] Furthermore, the branch output unit includes 12 sets of dual-core LC adapters, with an attenuation of ≤0.3dB / km@1310nm. The beam splitter unit is a three-stage PLC beam splitter, with a first-stage splitting ratio of 1:4, a second-stage splitting ratio of 1:8, and a third-stage splitting ratio of 1:8, and a total insertion loss of ≤20.5dB. The input terminal of the three-stage PLC beam splitter is connected to the jumper connection unit, and the output terminal is connected to the dual-core LC adapters one by one.

[0008] Furthermore, the patch cord connection unit includes 12 dual-core LC patch cords, with both ends connected to the 24-core MPO adapter of the trunk access unit and the input end of the splitter unit, respectively; the expansion interface unit includes a 24-core MPO branch trunk cable and a 24-core MPO-12×2-core LC branch cable.

[0009] Furthermore, the monitoring reserved unit includes a WDM wavelength division multiplexer. The input end of the WDM wavelength division multiplexer is connected to the backbone access unit, and the output end is used to connect to the temperature monitoring module and the vibration monitoring module. The temperature monitoring module supports constant temperature, temperature difference, and temperature rise alarms. The vibration monitoring module is used to identify external force damage and equipment theft. The WDM wavelength division multiplexer transmits monitoring data and distribution network data on the same fiber through different wavelengths.

[0010] Furthermore, the monitoring interface unit includes an OTDR monitoring interface, which is connected to the 24-core MPO adapter of the backbone access unit and connected to the fiber core quality online monitoring module. The fiber core quality online monitoring module uses OTDR technology to identify and locate fiber breaks, bending losses, and joint degradation at the meter level.

[0011] Furthermore, the splice-free optical distribution box is also equipped with a digital management interface, which connects to the optical fiber resource digital management platform. The optical fiber resource digital management platform displays the optical cable route and equipment location through a GIS map, and performs resource management, alarm linkage and third-party system integration.

[0012] Furthermore, a fiber distribution method based on a splice-free optical distribution box includes the following steps: Step S1, Factory Prefabrication: Integrate the pre-terminated fiber splitting assembly, splitter unit, monitoring interface unit and electronic tag assembly into the main body of the non-fusion splice optical distribution box, test the insertion loss and return loss of the trunk access unit, branch output unit and expansion interface unit, and write the equipment information into the electronic tag assembly. Step S2, On-site Deployment: Install the splice-free optical distribution box body at the target location, connect the 24-core main control optical cable from the optical distribution box inlet, and directly insert the MPO connector into the 24-core MPO adapter of the main access unit; lead out the branch optical cable from the optical distribution box outlet, and directly insert the LC connector of the branch equipment into the dual-core LC adapter of the branch output unit to complete the basic fiber splitting; Step S3, Expansion and Monitoring Access: Connect to adjacent non-fusion splice optical distribution boxes or new branch equipment through the expansion interface unit, connect to the temperature monitoring module and vibration monitoring module through the monitoring reserved unit, connect to the fiber core quality online monitoring module through the monitoring interface unit, and connect to the fiber resource digital management platform through the digital management interface.

[0013] Furthermore, the insertion loss test result is ≤0.5dB, and the return loss test result is ≥50dB; the temperature monitoring module and vibration monitoring module transmit data to the distribution network through a WDM wavelength division multiplexer, and the fiber core quality online monitoring module performs 24-hour all-weather monitoring through an OTDR monitoring interface.

[0014] The advantages of this invention are: This invention utilizes prefabricated, non-fusion splicing optical distribution boxes and pre-terminated fiber splitting components in the factory, integrating multiple types of interfaces such as MPO and LC, to achieve plug-and-play functionality on-site. This eliminates the traditional on-site fiber splicing steps, simplifies the construction process, improves fiber splitting efficiency and connection reliability, adapts to the fiber splitting needs of different equipment, and reduces the risk of failure caused by on-site operations.

[0015] This invention utilizes an online fiber core quality monitoring module and a distributed fiber multi-parameter module, combined with OTDR technology and dual monitoring capabilities for temperature and vibration, to achieve real-time alarm and precise location of fiber optic faults without the need for manual on-site troubleshooting. At the same time, it constructs a digital management platform for fiber optic resources, improving resource management efficiency and fault response speed, and reducing operation and maintenance costs.

[0016] This invention supports plug-and-play cascading expansion, adding branch links and monitoring module access through the design of extended interface units and reserved monitoring units. It uses WDM wavelength division multiplexing technology to achieve the transmission of monitoring data and distribution network data on the same fiber without interrupting existing communication links, thereby improving the expansion flexibility and environmental adaptability of the fiber distribution system. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0018] In the attached diagram: Figure 1 This is the link structure between the main network and the loopback cabinet in a fiber distribution network distribution device based on a splice-free optical distribution box in Example 1.

[0019] Figure 2 This is the loopback cabinet networking structure in a fiber distribution network distribution device based on a non-fusion splicing optical distribution box, as described in Example 1.

[0020] Figure 3 This is the structure of a distributed optical fiber monitoring unit in a distribution network fiber distribution device based on a splice-free optical distribution box, as shown in Example 1.

[0021] Figure 4 This is a schematic diagram of the integrated management platform in a fiber distribution network distribution device based on a splice-free optical distribution box in Example 1.

[0022] Figure 5 This is a data acquisition diagram of the pairing of port and jumper dual tags in a fiber distribution network distribution device based on a non-fusion splice optical distribution box in Example 1. Detailed Implementation

[0023] The present invention will now be described in detail and specifically through specific embodiments to enable a better understanding of the present invention. However, the following embodiments do not limit the scope of protection of the present invention. Example 1

[0024] like Figure 1-5 As shown, a fiber distribution network distribution device based on a splice-free optical distribution box includes a splice-free optical distribution box body and a pre-terminated fiber distribution assembly, a splitter unit, a monitoring interface unit, and an electronic tag assembly integrated inside the splice-free optical distribution box body. The splice-free optical distribution box body is made of flame-retardant material and has an inlet, an outlet, and an internal fixing bracket. The inlet and outlet are equipped with a sealing structure. The internal fixing bracket fixes the pre-terminated fiber distribution assembly and the splitter unit. The pre-terminated fiber distribution assembly includes a trunk access unit, a branch output unit, a jumper connection unit, an expansion interface unit, and a monitoring reserved unit. The trunk access unit is connected to the input end of the splitter unit through the jumper connection unit. The output end of the splitter unit is connected to the branch output unit. The expansion interface unit is connected to the trunk access unit. The monitoring reserved unit is located between the trunk access unit and the splitter unit. The monitoring interface unit is connected to the trunk access unit.

[0025] In a specific embodiment, the fiber distribution network distribution device based on the splice-free optical distribution box is mainly applied to the power system of smart communities. It is used to collect and monitor various power distribution information within the community, solving the problems of complex construction, long construction period, and susceptibility to abnormal situations that exist when using the current splicing and fusion splicing methods for smart community distribution network construction. The device includes a splice-free optical distribution box body, and integrated within it pre-terminated fiber distribution components, a splitter unit, a monitoring interface unit, and an electronic tag component. The splice-free optical distribution box body is made of flame-retardant material, which can withstand harsh environments such as humidity, corrosion, and high temperature, and is also rodent-proof, reducing the device damage rate and improving operational reliability. The body is equipped with an inlet, an outlet, and an internal fixing bracket. A sealing structure is configured at the inlet and outlet to enhance protection performance, and the internal fixing bracket is used to fix the pre-terminated fiber distribution components and the splitter unit. The pre-terminated fiber distribution assembly further includes a backbone access unit, a branch output unit, a patch cord connection unit, an expansion interface unit, and a monitoring reserved unit. The backbone access unit connects to the input of the splitter unit via the patch cord connection unit, the output of the splitter unit connects to the branch output unit, the expansion interface unit connects to the backbone access unit, the monitoring reserved unit is located between the backbone access unit and the splitter unit, and the monitoring interface unit also connects to the backbone access unit. The link structure between the main network and the loopback cabinet adopts a 24-core design. The backbone network is pre-terminated at the factory according to the distance of each loopback cabinet. After cabling is completed, communication can be established simply by plugging and unplugging. The factory-prefabricated fiber distribution boxes are installed in the loopback cabinets. Loopback cabinet #1 reserves fiber optic cables #1 and #2, loopback cabinet #2 reserves fiber optic cables #3 and #4, and so on. The ODF box inside the loopback cabinet can also reserve expansion interfaces to enable rapid access for monitoring modules such as temperature measurement.

[0026] Furthermore, the flame-retardant material of the non-fusion-bonded optical distribution box is ABS material, with dimensions of 400mm×300mm×150mm. The sealing structure is a waterproof sealing ring. The internal fixing bracket includes an optical cable fixing groove and a residual fiber storage tray. The electronic tag component is an NFC chip or an RFID chip, which is placed near the inlet.

[0027] In a specific embodiment, the flame-retardant material used for the splice-free optical distribution box is ABS. This material is non-metallic, waterproof, and rodent-proof, making it better suited to harsh environments such as humidity, corrosion, and high temperatures, thus reducing the risk of device damage. The dimensions of the splice-free optical distribution box are set at 400mm × 300mm × 300mm. The sealing structure at the inlet and outlet is a waterproof sealing ring, further enhancing the device's waterproof protection capabilities and preventing moisture from entering and affecting the operation of internal components. The internal fixing bracket includes an optical cable fixing slot and a fiber optic cable storage tray. The optical cable fixing slot ensures that the optical cable is laid out neatly, while the fiber optic cable storage tray properly stores excess optical fibers, preventing damage or signal interference caused by fiber clutter. The electronic tag components use either NFC or RFID chips. These chips are placed near the inlet. NFC chips can be programmed with device information at the factory, and on-site acceptance can be completed by sensing with a mobile terminal, achieving 100% accuracy and simplifying the management process. RFID chips can be read by bringing the chip ID within 0.5cm using a reader antenna, enabling rapid collection of device information and supporting subsequent digital management.

[0028] Furthermore, the backbone access unit includes a 24-core MPO adapter. The insertion loss of the 24-core MPO adapter is ≤0.5dB, and the return loss is ≥50dB. The 24-core MPO adapter is used to connect to a 24-core master control optical cable. The 24-core master control optical cable includes 22 communication cores and 2 spare cores. The plug assembly of the 24-core MPO adapter is of type PP or PC, and the socket assembly is of type SC.

[0029] In a specific embodiment, the backbone access unit of the pre-terminated fiber splitter assembly is equipped with a 24-core MPO adapter. This adapter is specifically designed for connecting to a 24-core master control optical cable. The 24-core master control optical cable includes 22 communication cores and 2 spare cores. The spare cores can be replaced promptly in case of communication core failure, ensuring communication continuity. The 24-core MPO adapter has an insertion loss ≤0.5dB and a return loss ≥50dB. The low insertion loss and high return loss reduce signal attenuation and reflection during transmission, ensuring stable signal transmission quality. The plug assembly of the 24-core MPO adapter is available in PP or PC type, and the socket assembly is SC type (standard type). It is used with pre-terminated optical cables, with termination completed before shipment. No fiber splicing is required on-site; it achieves plug-and-play functionality through the MPO interface, significantly improving connection efficiency and reliability, and avoiding the low efficiency and error-prone problems associated with on-site fiber splicing operations.

[0030] Furthermore, the branch output unit includes 12 sets of dual-core LC adapters, with an attenuation of ≤0.3dB / km@1310nm. The beam splitter unit is a three-stage PLC beam splitter, with a first-stage splitting ratio of 1:4, a second-stage splitting ratio of 1:8, and a third-stage splitting ratio of 1:8, and a total insertion loss of ≤20.5dB. The input terminal of the three-stage PLC beam splitter is connected to the jumper connection unit, and the output terminal is connected to the dual-core LC adapters one by one.

[0031] In a specific embodiment, the branch output unit includes 12 sets of dual-core LC adapters. The attenuation of the dual-core LC adapters is 0.3dB / km@1310nm. This low attenuation characteristic reduces signal loss during branch transmission, ensuring stable signal reception for each branch device. The splitter unit uses a three-stage PLC splitter, which supports multi-wavelength transmission from 1260 to 1650nm, meeting the multi-service requirements of the power distribution network. The three-stage PLC splitter has a first-stage splitting ratio of 1:4, a second-stage splitting ratio of 1:8, and a third-stage splitting ratio of 1:8, with a total insertion loss ≤20.5dB. This loss value includes connector loss and meets the 20km transmission margin requirement, ensuring normal signal transmission even after multiple splits. The input end of the three-level PLC splitter is connected to the jumper connection unit, and the output end is connected to the dual-core LC adapter one by one. After the branch optical cable is led out from the output port of the optical distribution box, the LC connector of the branch equipment can be directly inserted into the dual-core LC adapter to complete the basic fiber splitting. There is no need to perform complicated fiber splicing operations on site, which improves construction efficiency.

[0032] Furthermore, the patch cord connection unit includes 12 dual-core LC patch cords, with both ends connected to the 24-core MPO adapter of the trunk access unit and the input end of the splitter unit, respectively; the expansion interface unit includes a 24-core MPO branch trunk cable and a 24-core MPO-12×2-core LC branch cable.

[0033] In a specific embodiment, the patch cord connection unit consists of 12 dual-core LC patch cords. The two ends of these dual-core LC patch cords are connected to the 24-core MPO adapter of the backbone access unit and the input end of the splitter unit, respectively. Through the connection of the dual-core LC patch cords, stable signal transmission between the backbone access unit and the splitter unit is achieved. Furthermore, the patch cord connection method eliminates the need for on-site splicing, reducing construction steps and potential faults. The expansion interface unit includes a 24-core MPO branch backbone cable and a 24-core MPO-12×2-core LC branch line. When it is necessary to expand the distribution network coverage, the 24-core MPO branch backbone cable can be used to connect to adjacent splice-free optical distribution boxes, enabling network connections between multiple optical distribution boxes. When it is necessary to add branch equipment, the 24-core MPO-12×2-core LC branch line can be used to directly connect the new branch equipment without significantly modifying the original device structure, flexibly meeting the distribution network expansion needs and adapting to the distribution network construction conditions of different communities.

[0034] Furthermore, the monitoring reserved unit includes a WDM wavelength division multiplexer. The input end of the WDM wavelength division multiplexer is connected to the backbone access unit, and the output end is used to connect to the temperature monitoring module and the vibration monitoring module. The temperature monitoring module supports constant temperature, temperature difference, and temperature rise alarms. The vibration monitoring module is used to identify external force damage and equipment theft. The WDM wavelength division multiplexer transmits monitoring data and distribution network data on the same fiber through different wavelengths.

[0035] In a specific embodiment, the monitoring reserved unit is equipped with a WDM wavelength division multiplexer. The input of the WDM wavelength division multiplexer is connected to the backbone access unit, and the output is used to connect the temperature monitoring module and the vibration monitoring module. The temperature monitoring module supports constant temperature, temperature difference, and temperature rise alarms, and can accurately monitor the temperature safety of the pipe gallery and cables. It adopts a non-electric measurement method, is easy to use and highly integrated, and consumes only 4W. The vibration monitoring module is used to identify external damage and equipment theft. It has inherent lightning protection and electromagnetic interference resistance characteristics, and can also realize various linkage control and connection of multiple DTS units. The WDM wavelength division multiplexer adopts advanced wavelength division multiplexing technology, using different wavelengths to transmit monitoring data and distribution network data on the same fiber. There is no need to lay additional monitoring-specific optical cables, saving optical cable resources and construction costs. At the same time, it ensures that monitoring data and distribution network data transmission do not interfere with each other, ensuring the stability and security of the transmission of both types of data.

[0036] Furthermore, the monitoring interface unit includes an OTDR monitoring interface, which is connected to the 24-core MPO adapter of the backbone access unit and connected to the fiber core quality online monitoring module. The fiber core quality online monitoring module uses OTDR technology to identify and locate fiber breaks, bending losses, and joint degradation at the meter level.

[0037] In a specific embodiment, the monitoring interface unit includes an OTDR monitoring interface, which connects to the 24-core MPO adapter of the backbone access unit and is specifically used to connect to the online fiber core quality monitoring module. The online fiber core quality monitoring module operates based on OTDR technology, enabling 24 / 7 monitoring without the need for manual on-site inspection, significantly reducing the workload of maintenance personnel. During monitoring, the online fiber core quality monitoring module can accurately identify fault types such as fiber breaks, bending losses, and connector degradation. Once a fault is detected, it can issue an alarm signal in real time and has meter-level positioning capabilities, quickly determining the fault location. This provides precise guidance for maintenance personnel to handle faults promptly, shortens fault recovery time, reduces the duration of distribution network outages caused by faults, and improves the reliability of distribution network operation.

[0038] Furthermore, the splice-free optical distribution box is also equipped with a digital management interface, which connects to the optical fiber resource digital management platform. The optical fiber resource digital management platform displays the optical cable route and equipment location through a GIS map, and performs resource management, alarm linkage and third-party system integration.

[0039] In a specific embodiment, the splice-free optical distribution box is also additionally equipped with a digital management interface, which is connected to the optical fiber resource digital management platform. For example... Figure 4 As shown, 1-12 are dual-core LC adapters, 13-14 are 24-core MPO access adapters, 15-26 are dual-core LC patch cords, 27-28 are 24-core MPO branch trunk cables, and 29-30 are 24-core MPO-12×2-core LC branch lines. The fiber optic resource digital management platform, relying on the power grid resource business middleware, boasts rich functionality. Through GIS maps, it clearly displays fiber optic cable routes and equipment locations, supporting map-based queries and statistics, facilitating staff's intuitive understanding of the distribution network layout. In terms of resource management, it can digitally archive assets such as equipment rooms, ODF ports, and fiber cores. Fiber optic cable cores and their inserted ODF ports are presented graphically with intuitive correspondences on the APP and management platform. The access status of ODFs, ports, and communication equipment in the main network equipment room corresponds one-to-one with the actual status, improving resource management efficiency and accuracy. The platform also supports alarm linkage functions. When the fiber core quality online monitoring module or temperature and vibration monitoring module detects a fault, the platform can push fault information via SMS, WeChat, DingTalk, etc. It also supports integration with third-party systems, enabling data sharing and collaborative work with other management systems, further enhancing the intelligence level of distribution network management.

[0040] Furthermore, a fiber distribution method based on a splice-free optical distribution box includes the following steps: Step S1, Factory Prefabrication: Integrate the pre-terminated fiber splitting assembly, splitter unit, monitoring interface unit and electronic tag assembly into the main body of the non-fusion splice optical distribution box, test the insertion loss and return loss of the trunk access unit, branch output unit and expansion interface unit, and write the equipment information into the electronic tag assembly. Step S2, On-site Deployment: Install the splice-free optical distribution box body at the target location, connect the 24-core main control optical cable from the optical distribution box inlet, and directly insert the MPO connector into the 24-core MPO adapter of the main access unit; lead out the branch optical cable from the optical distribution box outlet, and directly insert the LC connector of the branch equipment into the dual-core LC adapter of the branch output unit to complete the basic fiber splitting; Step S3, Expansion and Monitoring Access: Connect to adjacent non-fusion splice optical distribution boxes or new branch equipment through the expansion interface unit, connect to the temperature monitoring module and vibration monitoring module through the monitoring reserved unit, connect to the fiber core quality online monitoring module through the monitoring interface unit, and connect to the fiber resource digital management platform through the digital management interface.

[0041] In a specific embodiment, the fiber distribution method based on the splice-free optical distribution box mainly consists of three steps: factory prefabrication, on-site deployment, and expansion and monitoring access. In the factory prefabrication step, workers integrate pre-terminated fiber distribution components, splitter units, monitoring interface units, and electronic tag components into the main body of the splice-free optical distribution box. After integration, the insertion loss and return loss of the backbone access unit, branch output unit, and expansion interface unit are tested to ensure that the performance of each unit meets the usage requirements. Then, equipment information is written into the electronic tag component, providing basic data for subsequent on-site acceptance and management. In the on-site deployment step, the splice-free optical distribution box is first installed at the target location. Then, a 24-core backbone control optical cable is connected from the optical distribution box inlet. The MPO connector is directly inserted into the 24-core MPO adapter of the backbone access unit. Branch optical cables are then led out from the optical distribution box outlet, and the LC connector of the branch equipment is directly inserted into the dual-core LC adapter of the branch output unit. This completes the basic fiber distribution, eliminating the need for on-site fiber splicing and significantly shortening construction time. In the expansion and monitoring access steps, based on the distribution network construction requirements, adjacent non-fusion splice optical distribution boxes or newly added branch equipment are connected through expansion interface units to expand the distribution network range; temperature monitoring modules and vibration monitoring modules are connected through monitoring reserved units to achieve real-time monitoring of the distribution network environment and equipment status; fiber core quality online monitoring modules are connected through monitoring interface units to achieve all-weather monitoring of fiber core quality; and the digital management interface is connected to the optical fiber resource digital management platform to achieve intelligent management of distribution network resources.

[0042] Furthermore, the insertion loss test result is ≤0.5dB, and the return loss test result is ≥50dB; the temperature monitoring module and vibration monitoring module transmit data to the distribution network through a WDM wavelength division multiplexer, and the fiber core quality online monitoring module performs 24-hour all-weather monitoring through an OTDR monitoring interface.

[0043] In a specific embodiment, insertion loss and return loss tests are performed on the backbone access unit, branch output unit, and expansion interface unit during the factory prefabrication stage. The insertion loss test result must be ≤0.5dB, and the return loss test result must be ≥50dB. This testing standard ensures that each unit experiences minimal attenuation and reflection during signal transmission, guaranteeing stable signal transmission quality in the distribution network. The temperature monitoring module and vibration monitoring module achieve co-fiber transmission with distribution network data through the WDM wavelength division multiplexer of the monitoring reserved unit. Different wavelengths are used to transmit monitoring data and distribution network data separately, avoiding mutual interference between the two types of data transmission, while saving optical cable resources and reducing construction costs. The fiber core quality online monitoring module performs 24 / 7 monitoring through the OTDR monitoring interface of the monitoring interface unit, eliminating the need for regular on-site inspections. It can identify faults such as fiber breakage, bending loss, and joint deterioration in real time. Once a fault is detected, it can quickly issue an alarm and perform meter-level location, facilitating timely handling by maintenance personnel, reducing the impact of faults on distribution network operation, and improving the efficiency and reliability of distribution network operation and maintenance.

[0044] The specific embodiments of the present invention have been described in detail above, but they are merely examples, and the present invention is not equivalent to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to the present invention are also within the scope of the present invention. Therefore, all equivalent transformations and modifications made without departing from the spirit and scope of the present invention should be covered within the scope of the present invention.

Claims

1. A distribution network fiber splitting device based on a fusion splice-free optical distribution box, characterized in that, The system includes a splice-free optical distribution box body and pre-terminated fiber splitting components, a splitter unit, a monitoring interface unit, and an electronic tag assembly integrated within the splice-free optical distribution box body. The splice-free optical distribution box body is made of flame-retardant material and has an inlet, an outlet, and an internal fixing bracket. The inlet and outlet are equipped with a sealing structure. The internal fixing bracket fixes the pre-terminated fiber splitting components and the splitter unit. The pre-terminated fiber splitting components include a trunk access unit, a branch output unit, a jumper connection unit, an expansion interface unit, and a reserved monitoring unit. The trunk access unit is connected to the input end of the splitter unit through the jumper connection unit. The output end of the splitter unit is connected to the branch output unit. The expansion interface unit is connected to the trunk access unit. The reserved monitoring unit is located between the trunk access unit and the splitter unit. The monitoring interface unit is connected to the trunk access unit.

2. The fiber distribution apparatus based on the fusion-free optical closure for network distribution of claim 1, wherein, The flame-retardant material of the non-fusion-free optical distribution box is ABS material, and its size is 400mm×300mm×150mm. The sealing structure is a waterproof sealing ring. The internal fixing bracket includes an optical cable fixing groove and a fiber optic cable storage tray. The electronic tag component is an NFC chip or an RFID chip, and the NFC chip or RFID chip is set close to the inlet.

3. A fiber distribution device based on a splice-free optical distribution box according to claim 2, characterized in that, The backbone access unit includes a 24-core MPO adapter. The insertion loss of the 24-core MPO adapter is ≤0.5dB, and the return loss is ≥50dB. The 24-core MPO adapter is used to connect to a 24-core master control optical cable. The 24-core master control optical cable includes 22 communication cores and 2 spare cores. The plug assembly of the 24-core MPO adapter is of type PP or PC, and the socket assembly is of type SC.

4. A fiber distribution device based on a splice-free optical distribution box according to claim 3, characterized in that, The branch output unit includes 12 sets of dual-core LC adapters, the attenuation of the dual-core LC adapters is ≤0.3dB / km@1310nm, the beam splitter unit is a three-stage PLC beam splitter, the first stage beam splitting ratio of the three-stage PLC beam splitter is 1:4, the second stage beam splitting ratio is 1:8, the third stage beam splitting ratio is 1:8, and the total insertion loss is ≤20.5dB. The input terminal of the three-stage PLC beam splitter is connected to the jumper connection unit, and the output terminal is connected to the dual-core LC adapters one by one.

5. A fiber distribution device based on a splice-free optical distribution box according to claim 4, characterized in that, The patch cord connection unit includes 12 dual-core LC patch cords, with both ends connected to the 24-core MPO adapter of the backbone access unit and the input end of the splitter unit, respectively; the expansion interface unit includes a 24-core MPO branch backbone cable and a 24-core MPO-12×2-core LC branch cable.

6. A fiber distribution device based on a splice-free optical distribution box according to claim 5, characterized in that, The monitoring reserved unit includes a WDM wavelength division multiplexer. The input end of the WDM wavelength division multiplexer is connected to the backbone access unit, and the output end is used to connect to the temperature monitoring module and the vibration monitoring module. The temperature monitoring module supports constant temperature, temperature difference and temperature rise alarms. The vibration monitoring module is used to identify external force damage and equipment theft. The WDM wavelength division multiplexer transmits monitoring data and distribution network data on the same fiber through different wavelengths.

7. A fiber distribution device based on a splice-free optical distribution box according to claim 6, characterized in that, The monitoring interface unit includes an OTDR monitoring interface, which is connected to the 24-core MPO adapter of the backbone access unit and connected to the fiber core quality online monitoring module. The fiber core quality online monitoring module uses OTDR technology to identify and locate fiber breaks, bending losses and joint degradation at the meter level.

8. A fiber distribution device based on a splice-free optical distribution box according to claim 7, characterized in that, The splice-free optical distribution box is also equipped with a digital management interface, which is connected to the optical fiber resource digital management platform. The optical fiber resource digital management platform displays the optical cable route and equipment location through a GIS map, and performs resource management, alarm linkage and third-party system integration.

9. A fiber distribution method based on a splice-free optical distribution box, characterized in that, Includes the following steps: Step S1, Factory Prefabrication: Integrate the pre-terminated fiber splitter assembly, splitter unit, monitoring interface unit and electronic tag assembly into the main body of the non-fusion splice optical distribution box, test the insertion loss and return loss of the trunk access unit, branch output unit and expansion interface unit, and write the equipment information into the electronic tag assembly. Step S2, On-site Deployment: Install the splice-free optical distribution box body at the target location, connect the 24-core main control optical cable from the optical distribution box inlet, and directly insert the MPO connector into the 24-core MPO adapter of the main access unit; lead out the branch optical cable from the optical distribution box outlet, and directly insert the LC connector of the branch equipment into the dual-core LC adapter of the branch output unit to complete the basic fiber splitting; Step S3, Expansion and Monitoring Access: Connect to adjacent non-fusion splice optical distribution boxes or new branch equipment through the expansion interface unit, connect to the temperature monitoring module and vibration monitoring module through the monitoring reserved unit, connect to the fiber core quality online monitoring module through the monitoring interface unit, and connect to the fiber resource digital management platform through the digital management interface.

10. A fiber distribution method based on a splice-free optical distribution box according to claim 9, characterized in that, The insertion loss test result is ≤0.5dB, and the return loss test result is ≥50dB; the temperature monitoring module and vibration monitoring module transmit data to the distribution network through a WDM wavelength division multiplexer on the same fiber, and the fiber core quality online monitoring module performs 24-hour all-weather monitoring through an OTDR monitoring interface.

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