A waterproof cable branch box

Abstract

The application is suitable for the technical field of cable branch box, and particularly relates to a waterproof cable branch box, which comprises a box body, an inlet sealing assembly, a double-path isolation sampling piece, a double-cavity reference piece and a low-position check disposal piece. The box body is provided with a cable inlet for the cable to enter. The inlet sealing assembly is installed in the cable inlet. The double-path isolation sampling piece is arranged in the box body, close to the cable inlet and comprises a sheath sampling arm, a folded edge sampling arm and a water isolation ridge. The double-cavity reference piece is arranged adjacent to the double-path isolation sampling piece and comprises two blind-end reference cavities corresponding to the sheath sampling arm and the folded edge sampling arm respectively. The two blind-end reference cavities are separated by a hydrophobic partition wall. The low-position check disposal piece is arranged at a water discharge position of the double-path isolation sampling piece and corresponds to water discharge ends of the sheath sampling arm and the folded edge sampling arm respectively, so as to solve the problems of water source misjudgment, transverse water leakage and low-position residual misjudgment caused by the difficulty in distinguishing the sheath side water path and the folded edge side water path before water convergence.

Description

Technical Field

[0001] This application belongs to the technical field of cable branch boxes, and particularly relates to a waterproof cable branch box. Background Technology

[0002] Waterproof cable branch boxes are commonly used for branching, connecting, and protecting power cables. These boxes typically include the box body, branch connection components, and cable inlets for the cables to enter. To ensure the stability of the internal electrical connections, an inlet sealing component is usually installed at the cable inlet to create a seal between the cable sheath and the inlet wall. Under normal operating conditions, the inlet sealing component primarily prevents external moisture from entering the box through the gap between the inlet wall and the outer sheath. For prefabricated cable inlets with matching specifications, stable compression, and relatively neat box installation, basic waterproofing requirements can be met simply by using sealing rings, sealant, glands, or modular cable guides. In this case, the waterproofing issue at the cable inlet mainly concerns whether the seal is installed correctly, whether the compression is sufficient, and whether the sealing material is continuous.

[0003] However, in the low-position inlet structure of cable branch boxes, the inlet sealing interface is not the only possible water path near the cable inlet. After the cable outer sheath enters the box from outside, a small contact gap may form between the outer sheath surface and the inlet sealing component, allowing moisture to slowly creep inwards along this gap. Simultaneously, the box bottom plate, inlet flange, inner fold, or drip line may also guide moisture to the vicinity of the cable inlet. These two types of moisture have different spatial sources and directions of propagation in the initial stages of entering the box. The sheath-side water path typically propagates along the surface of the cable outer sheath or the sealing contact boundary, with its initial wetting position closer to the inner edge of the inlet sealing component, and gradually responding along the extension direction of the cable outer sheath. The flange-side water path typically falls along the box flange, inlet flange, or drip line, with its initial wetting position closer to the lower edge of the flange, and propagating along the lower direction of the flange or drip-receiving structure. These two types of water paths may not converge before reaching the low-position bend of the cable, the cable tie fixing point, or the bottom of the box.

[0004] Existing waterproofing detection methods typically involve setting up single-point water immersion detection terminals at the bottom of the enclosure, low-level water collection points, or near cable inlets. While this approach can detect moisture inside the enclosure, the detection location is often after the convergence of two water paths. When the detection terminal generates a wet response, the moisture has already manifested as a single wet patch, making it difficult to determine whether the moisture originates primarily from the cable sheath or the enclosure's folded edge. Relying solely on single-point water immersion signals can easily lead to misjudgment of the source. To improve identification capabilities, some methods add multiple water immersion detection points near the cable inlets. However, if these multiple detection points do not correspond to the pre-convergence geometry of the water paths on the sheath and folded edge sides, they only increase the number of wet responses and still cannot reliably reflect the water source. If adjacent detection points form continuous water-conducting channels, continuous conductive paths, or liquid-connected spaces, it can also cause cross-contamination, corrosion, or false triggering, turning the detection structure itself into a new source of risk.

[0005] Misjudging the source of water flow can lead to direct deviations in maintenance and structural treatment. When the water flow is dominant on the folded side, increasing the compression of the inlet sealing assembly will not eliminate water flow in the folded direction. When the water flow is dominant on the sheath side, simply cleaning the bottom of the chamber or replacing the absorbent component will not improve the tiny water flow at the inlet sealing contact boundary. More importantly, if the detection structure itself forms a continuous water flow path, a continuous conductive ring, or liquid connectivity between adjacent sampling areas, it may turn the local detection structure into a new factor for water inflow or crossflow. Summary of the Invention

[0006] This application provides a waterproof cable branch box that can solve the problems of misjudging the source of water, lateral water flow, and low-level residue caused by the difficulty of distinguishing between the water path on the sheath side and the water path on the folded edge side before water convergence due to the existing structure.

[0007] In a first aspect, embodiments of this application provide a waterproof cable branch box, comprising: The enclosure has a cable inlet for cables to pass through; An inlet sealing assembly is installed inside the cable inlet and forms a circumferential sealing fit between the hole wall of the cable inlet and the outer sheath of the cable. A dual-path isolation sampling device is installed inside the enclosure and near the cable inlet; the dual-path isolation sampling device includes a sheath sampling arm close to the outer sheath, a folded edge sampling arm located at the lower edge of the folded edge of the enclosure, and a water-proof ridge between the two sampling arms; the dual-path isolation sampling device is used to independently collect the responses of the sheath-side water path and the folded edge-side water path before water merges, and the water-proof ridge reduces the risk of lateral crosstalk between the two water paths; A dual-cavity reference element is disposed adjacent to and fixed relative to the dual-path isolation sampling element; the dual-cavity reference element includes two blind-end reference cavities corresponding to the sheath sampling arm and the folded-edge sampling arm respectively, and the two blind-end reference cavities are separated by a hydrophobic partition wall to provide a comparable environmental drift reference; and A low-level backflow prevention device is installed at the moisture outlet of the dual-path isolation sampling device and corresponds to the moisture outlet ends of the sheath sampling arm and the folded-edge sampling arm, respectively. The low-level backflow prevention device includes two isolation inlet sections corresponding to the sheath sampling arm and the folded-edge sampling arm, respectively. A backflow prevention partition is provided between the two isolation inlet sections to receive and treat the two moisture sources in a separate area and reduce the risk of lateral water cross-contamination and residual misjudgment at the low level.

[0008] The technical solutions described in this application embodiment have at least the following technical effects: The waterproof cable branch box provided in this application features a dual-path sampling structure with independent isolation, specifically designed to address the different spatial sources and directions of water flow during actual use. Before the water channels on the sheath side and the folded edge side converge, independent sampling of the two water channels is completed. Water-resistant ridges, drainage walls, and backflow preventers block the lateral connection between the two water channels during the sampling, reference, and water treatment stages, respectively, preventing misjudgment of the source caused by cross-contamination. Simultaneously, a dual-cavity reference component provides an environmental drift reference, offsetting detection drift caused by changes in environmental humidity, improving the accuracy of water source determination, and facilitating targeted troubleshooting of waterproofing defects by maintenance personnel. This approach addresses sealing defects on the sheath side and water-conducting defects on the folded edge side separately, avoiding ineffective maintenance due to misjudgment of the source. It also prevents the detection structure itself from creating additional water-conducting or cross-conducting paths, thus preventing local detection structures from becoming new water-conducting or cross-conducting factors. This solves the problems of existing waterproof cable branch boxes, which only have single-point or unisolated multi-point water immersion detection structures near the cable inlet or at the low position of the box. These structures cannot sample separately before the water paths on the sheath side and the folded edge side converge, leading to inaccurate water source identification, detection signals being easily affected by environmental drift and lateral cross-conducting, and misjudgment of maintenance procedures. This improves the reliability and maintenance efficiency of waterproof detection in cable branch boxes.

[0009] Secondly, embodiments of this application provide a method for determining the water source of a waterproof cable branch box, applied to the waterproof cable branch box described in the first aspect above, characterized in that the method includes: During the testing period, the response sequence on the sheath side, the response sequence on the folded edge side, and two reference response sequences were determined. Based on the common change of the two reference response sequences within the same detection period, the environmental drift is determined, and the environmental drift is used to correct the sheath-side response sequence and the folded-edge response sequence respectively, to obtain the sheath-side correction sequence and the folded-edge correction sequence. Based on the trigger sequence, response change amplitude, and continuous rise time of each sampling point in the sheath side correction sequence along the arrangement direction of the sheath sampling arm, the sheath propulsion integrity, the advance amount of the first trigger moment of the sheath, and the continuous rise time of the sheath are determined, and the sheath source quantity is obtained. Based on the trigger sequence, response change amplitude, and continuous rise time of each sampling point in the folding side correction sequence along the folding sampling arm arrangement direction, determine the folding progress integrity, the advance amount of the first triggering moment of the folding, and the continuous rise time of the folding, and obtain the folding source amount; The common-mode anomaly is obtained based on the synchronous change amplitude of the two reference response sequences, the sheath-side correction sequence, and the folded-edge correction sequence; Water source determination data is obtained based on the sheath source quantity, the folded edge source quantity, and the common mode anomaly quantity.

[0010] The technical solutions described in this application embodiment have at least the following technical effects: The water source determination method for waterproof cable branch boxes provided in this application can be based on independent response data obtained from dual-channel isolated sampling, combined with environmental drift correction to eliminate environmental humidity interference. It can quantify the source contribution of water channels on the sheath side and the folded edge side according to the unique propagation direction characteristics of the two types of water channels. At the same time, it can distinguish between environmental interference and the actual water channel wetting response by common mode anomaly, and finally output stable and accurate water source determination data. This is conducive to subsequent targeted defect maintenance and effectively solves the problems of traditional single-point detection being unable to distinguish water source and multi-channel sampling being prone to cross-contamination and misjudgment. It greatly improves the accuracy of water ingress defect determination and maintenance efficiency of cable branch boxes. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the external casing of a waterproof cable branch box provided in one embodiment of this application; Figure 2 This is a schematic diagram of the internal structure of a waterproof cable branch box provided in one embodiment of this application; Figure 3 This is a flowchart illustrating a method for determining the water source of a waterproof cable branch box according to an embodiment of this application. Figure 4 This is a schematic diagram illustrating a scenario where the amount of sheath source is obtained according to an embodiment of this application; Figure 5 This is a schematic diagram illustrating a scenario for obtaining the amount of folded edge source provided in an embodiment of this application; Figure 6 This is a schematic diagram of a scenario for obtaining common mode anomalies provided in an embodiment of this application; Figure 7 This is a schematic diagram of a scenario provided by an embodiment of this application, which shows how water source determination data is obtained based on the sheath source quantity, the folded edge source quantity, and the common mode anomaly quantity. Figure 8 This is a schematic diagram of the controller provided in the embodiments of this application.

[0013] Labels for each item in the figure: 100. Waterproof cable branch box; 10. Box body; 20. Inlet sealing assembly; 30. Dual-path isolation sampling component; 40. Dual-cavity reference component; 50. Low-level check valve component. Detailed Implementation

[0014] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0015] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0016] Existing waterproofing detection methods typically involve setting up single-point water immersion detection terminals at the bottom of the enclosure, low-level water collection points, or near cable inlets. While this approach can detect moisture inside the enclosure, the detection location is often after the convergence of two water paths. When the detection terminal generates a wet response, the moisture has already manifested as a single wet patch, making it difficult to determine whether the moisture originates primarily from the cable sheath or the enclosure's folded edge. Relying solely on single-point water immersion signals can easily lead to misjudgment of the source. To improve identification capabilities, some methods add multiple water immersion detection points near the cable inlets. However, if these multiple detection points do not correspond to the pre-convergence geometry of the water paths on the sheath and folded edge sides, they only increase the number of wet responses and still cannot reliably reflect the water source. If adjacent detection points form continuous water-conducting channels, continuous conductive paths, or liquid-connected spaces, it can also cause cross-contamination, corrosion, or false triggering, turning the detection structure itself into a new source of risk.

[0017] Misjudging the source of water flow can lead to direct deviations in maintenance and structural treatment. When the water flow is dominant on the folded side, increasing the compression of the inlet sealing assembly will not eliminate water flow in the folded direction; when the water flow is dominant on the sheath side, simply cleaning the bottom of the chamber or replacing the absorbent component will not improve the tiny water flow at the inlet seal contact boundary. More importantly, if the detection structure itself forms a continuous water flow path, a continuous conductive ring, or liquid communication between adjacent sampling areas, it may turn the local detection structure into a new factor for water inflow or crossflow.

[0018] To address the aforementioned issues, this application provides a waterproof cable branch box.

[0019] Please refer to the following: Figure 1 and Figure 2 This application provides a waterproof cable branch box 100, including a box body 10, an inlet sealing assembly 20, a dual-path isolation sampling component 30, a dual-cavity reference component 40, and a low-position check valve component 50, wherein: The enclosure 10 has a cable inlet for cables to pass through.

[0020] The inlet sealing assembly 20 is installed inside the cable inlet and forms a circumferential sealing fit between the hole wall of the cable inlet and the outer sheath of the cable.

[0021] The dual-path isolation sampling component 30 is installed inside the housing 10 and close to the cable inlet; the dual-path isolation sampling component 30 includes a sheath sampling arm close to the outer sheath, a folded edge sampling arm located at the lower edge of the folded edge of the housing 10, and a water-proof ridge separated between the two sampling arms; the dual-path isolation sampling component 30 is used to independently collect the responses of the sheath side water path and the folded edge side water path before the water merges, and reduces the risk of lateral crosstalk between the two water paths through the water-proof ridge.

[0022] The dual-cavity reference component 40 is arranged adjacent to and fixed relative to the dual-path isolation sampling component 30; the dual-cavity reference component 40 includes two blind-end reference cavities corresponding to the sheath sampling arm and the folded edge sampling arm respectively, and the two blind-end reference cavities are separated by a hydrophobic partition wall to provide a comparable environmental drift reference.

[0023] The low-level backflow prevention device 50 is located at the moisture outlet of the dual-path isolation sampling device 30 and corresponds to the moisture outlet of the sheath sampling arm and the folded edge sampling arm, respectively. The low-level backflow prevention device 50 includes two isolation inlet sections corresponding to the sheath sampling arm and the folded edge sampling arm, respectively. A backflow prevention partition is provided between the two isolation inlet sections to receive and treat the two moisture sources in a separate area, and to reduce the risk of lateral water cross-contamination and residual misjudgment at the low level.

[0024] It is important to note that the enclosure 10 is typically a shell structure made of metal or high-strength engineering plastic, with internal space for installing cable connectors and electrical components. Holes are provided on the side walls or bottom for cable entry. The inlet sealing assembly 20 can be a multi-layer rubber sealing ring or a sealing ring with a compression expansion structure, tightly filling the annular gap between the cable inlet wall and the cable outer sheath, achieving circumferential sealing through elastic deformation. The dual-path isolation sampling component 30 can be a support assembly made of insulating and water-resistant material (such as PVC or polytetrafluoroethylene), where the sheath sampling arm is a strip structure attached to the surface of the cable outer sheath, and the folded-edge sampling arm is a strip structure arranged along the bend at the lower edge of the enclosure 10; the water-resistant ridge can be a longitudinal water-retaining wall protruding between the two sampling arms; this assembly integrates a moisture sensor for detecting moisture in both paths. The dual-chamber reference component 40 is a sealed box structure arranged parallel to the sampling arm. It contains two independent blind-end reference chambers (i.e., closed chambers not connected to the liquid in the sampling path), separated by a hydrophobic partition. Temperature and humidity sensors are installed within the chambers to detect natural drift in ambient humidity. The low-level check valve component 50 is a water guiding and storage assembly located at the bottom of the housing 10. It includes two independent, trough-shaped isolation inlet sections, with a check valve or high baffle between them. This check valve receives the water flow from the upper sampling arm and prevents the water from mixing back at the bottom.

[0025] As can be seen from the above, the waterproof cable branch box 100 provided in this application can be designed with an independently isolated dual-path sampling structure based on the different spatial sources and directions of water flow during actual use. Before the water path on the sheath side and the water path on the folded edge side converge, independent sampling of the two water paths is completed. Through a water-proof ridge, a water-draining partition wall, and a backflow preventer, the lateral connection between the two water paths is blocked during the sampling, reference, and water-conducting treatment stages, respectively, avoiding misjudgment of the source caused by cross-contamination. Simultaneously, the dual-cavity reference component 40 provides an environmental drift reference, which can offset the detection drift caused by changes in environmental humidity, improve the accuracy of water source determination, and facilitate targeted troubleshooting by maintenance personnel. Water defects are addressed by separately handling sealing defects on the sheath side or water conduction defects on the folded edge side. This avoids ineffective maintenance due to misjudgment of the source and prevents the detection structure itself from creating additional water conduction or cross-contamination paths. It also prevents the local detection structure from becoming a new water conduction or cross-contamination factor. This solves the problems caused by existing waterproof cable branch boxes 100, which only have single-point or unisolated multi-point water immersion detection structures near the cable inlet or at the low position of the box 10. This prevents sampling before the water paths on the sheath side and the folded edge side converge, resulting in inaccurate water source identification, detection signals being easily affected by environmental drift and lateral cross-contamination, and misjudgment of maintenance procedures. This improves the reliability and maintenance efficiency of waterproof detection in cable branch boxes.

[0026] In some embodiments, please refer to the following: Figure 1 and Figure 2 The sheath sampling arm and the folded edge sampling arm are arranged at intervals along the circumference of the cable inlet, and the water-proof ridge extends along the interval area between the sheath sampling arm and the folded edge sampling arm to restrict the water path on the sheath side and the water path on the folded edge to their respective sampling paths.

[0027] It is understandable that the sheath sampling arm and the folded edge sampling arm are arranged at intervals along the circumference of the cable inlet. This means that they are not overlapped on the same water path, but are distributed at different circumferential positions around the cable inlet to correspond to the water propagation paths on the cable outer sheath side and the folded edge side of the enclosure, respectively. The water-blocking ridge forms a continuous or nearly continuous water-blocking boundary between the two sampling paths.

[0028] This configuration allows for the limitation of the flow or wetting range of the two water sources before they mix, enabling the sheath sampling arm to primarily respond to the sheath-side water path and the folded-edge sampling arm to primarily respond to the folded-edge-side water path, thereby improving the accuracy of distinguishing water sources.

[0029] Optionally, in some embodiments, please also refer to Figure 1 and Figure 2 The two blind-end reference cavities are adjacent to the sheath sampling arm and the folded edge sampling arm, respectively, but are not directly connected to the liquid. The opening of each blind-end reference cavity is set to face the corresponding sampling arm so that the blind-end reference cavity can obtain the environmental humidity changes near the corresponding sampling path and prevent the sampling water flow from entering.

[0030] It is understandable that the two blind-end reference cavities are adjacent to the sheath sampling arm and the folded-edge sampling arm, respectively. This means that each blind-end reference cavity is located near its corresponding sampling arm and can sense changes in air humidity, temperature, or condensation environment near the sampling path. "No direct liquid communication" means that no continuous liquid channel is formed between the blind-end reference cavity and the sampling arm, allowing direct water flow. The cavity openings are oriented towards the corresponding sampling arm to allow the blind-end reference cavities to approach the local environment of the corresponding sampling area, while the blind-end structure prevents water flow along the sampling path from penetrating and entering.

[0031] For example, the blind-end reference cavity can be a box structure with a closed bottom and open sides, enclosed by a plastic shell. The opening is covered with a breathable but waterproof membrane, such as a polytetrafluoroethylene membrane. The reference sampling end can be a capacitive humidity sensor installed inside the blind-end reference cavity. When the humidity inside the chamber changes, moisture passes through the semi-permeable membrane into the cavity and is sensed by the sensor. Even if a large amount of water flows through the sampling arm, the water cannot penetrate the semi-permeable membrane into the cavity, thus the reference sensor obtains a pure environmental drift signal, unaffected by the direct interference of the sampling water flow.

[0032] Optionally, in some embodiments, please also refer to Figure 1 and Figure 2 The two isolation inlet sections are respectively connected to the moisture outlet ends of the sheath sampling arm and the folded edge sampling arm. The check valve extends along the separation area between the two isolation inlet sections to restrict the backflow or lateral communication of moisture in either isolation inlet section to the other isolation inlet section.

[0033] Specifically, the two isolation inlet sections can be funnel-shaped guide channels or small water storage boxes located at the bottom of the housing 10, with their upper openings directly facing the end water inlets of the sheathed sampling arm and the folded-edge sampling arm, respectively. The check valve can be a tall solid baffle located between the two guide channels, or a duckbill-type one-way silicone check valve installed at the connection point of the guide channels.

[0034] For example, when the water flow on one side is too large and overflow occurs, the baffle can prevent the water flow from crossing the boundary, or the duckbill valve can close under unidirectional water pressure to prevent the water flow from entering the isolation inlet section on the other side, so that the two water sources remain strictly separated in the final low-level collection and treatment stage, preventing lateral water flow at the bottom from causing misjudgment.

[0035] Optionally, in some embodiments, please also refer to Figure 1 and Figure 2 The sheath sampling arm is provided with a first intermittent sampling end arranged at intervals along the water path advancement direction on the sheath side, the folded edge sampling arm is provided with a second intermittent sampling end arranged at intervals along the water path advancement direction on the folded edge side, and the two blind end reference cavities are respectively provided with reference sampling ends.

[0036] Specifically, the first and second intermittent sampling ends can be multiple electrode probes or fiber optic water immersion sensor probes arranged at equal intervals from top to bottom along the length of their respective sampling arms. The reference sampling end is a temperature and humidity sensor probe. The first intermittent sampling ends are distributed at intervals from top to bottom close to the surface of the sheath, and the second intermittent sampling ends are distributed at intervals from top to bottom along the 10-fold edge of the housing. The reference sampling ends are respectively installed at the center of the two blind-end reference cavities. For example, when water flows down along the sheath or fold edge, it will trigger each intermittent sampling end in sequence. The controller can determine the direction and velocity of water propagation by recording the triggering sequence and time of these sampling ends; while the reference sampling end continuously monitors the humidity inside the cavity. By comparing the data of the two, the actual water path response and environmental drift can be separated.

[0037] This application also provides a method for determining the source of water in a waterproof cable branch box. This method can eliminate environmental humidity interference based on independent response data obtained from dual-channel isolated sampling and environmental drift correction. It can quantify the source contribution of water in the sheath side and the folded edge side according to the unique propagation direction characteristics of the two types of water channels. At the same time, it can distinguish between environmental interference and the actual water channel wetting response by common mode anomaly. Finally, it can stably output accurate water source determination data, which is conducive to subsequent targeted defect maintenance. It effectively solves the problems that traditional single-point detection cannot distinguish the source of water and multi-channel sampling is prone to cross-contamination and misjudgment, which greatly improves the accuracy of water ingress defect determination and maintenance efficiency of cable branch box.

[0038] The water source determination method for the waterproof cable branch box provided in this application embodiment can be applied to the controller of the waterproof cable branch box. In this case, the controller of the waterproof cable branch box is the executing entity of the water source determination method for the waterproof cable branch box provided in this application embodiment. This application embodiment does not impose any restrictions on the specific type of controller for the waterproof cable branch box.

[0039] To better understand the water source determination method for the waterproof cable branch box provided in this application embodiment, the following is an exemplary description of the water source determination method for the waterproof cable branch box provided in this application embodiment.

[0040] Figure 3 This paper illustrates a schematic diagram of the workflow of the water source determination method for a waterproof cable branch box provided in an embodiment of this application. The water source determination method for the waterproof cable branch box includes: S100, within the detection cycle, determines the sheath side response sequence, the folded edge side response sequence, and two reference response sequences.

[0041] It can be understood that the detection cycle is the time range within which the controller performs a water source determination once according to a preset time length or a preset number of samplings; the sheath side response sequence comes from the first intermittent sampling end on the sheath sampling arm, the folded edge side response sequence comes from the second intermittent sampling end on the folded edge sampling arm, and the two reference response sequences come from the reference sampling ends of the two blind end reference cavities respectively; the two reference response sequences refer to the reference data sequences from the sheath side and the folded edge side under normal operating conditions or as reference standards.

[0042] For example, after the detection cycle begins, the controller obtains the electrical or digital signals output by each sampling end according to the preset sampling frequency, and adds sampling time and sampling end identifier to each sample value. The controller first removes invalid values ​​that are obviously beyond the effective range of the hardware, and then sorts the data according to the location of the sampling end and the sampling time, thereby forming the sheath side response sequence, the folded edge side response sequence, the sheath side reference response sequence, and the folded edge side reference response sequence, so as to simultaneously obtain the spatial location and temporal change of the moisture response, and provide basic data for determining the direction of water channel propulsion.

[0043] S200: Based on the common change of the two reference response sequences within the same detection period, determine the environmental drift amount, and use the environmental drift amount to correct the sheath-side response sequence and the folded-edge-side response sequence respectively, to obtain the sheath-side correction sequence and the folded-edge-side correction sequence.

[0044] It is understandable that environmental drift refers to the common response change caused by changes in the overall humidity, temperature or background moisture inside the tank, rather than the local response caused by the direct propulsion of a certain water flow.

[0045] For example, the controller can compare the direction and magnitude of change of two reference response sequences within the same detection period. When the two reference response sequences show changes in similar directions and rhythms, the common change is identified as environmental drift and used as a correction basis for the sheath-side response sequence and the folded-edge response sequence, respectively. During correction, the controller can deduct, reduce the weight, or mark the part of the sampling arm response that corresponds to the common environmental change, thereby obtaining a sheath-side correction sequence and a folded-edge correction sequence that better reflect the actual waterway propulsion. This can reduce the interference of synchronous changes in environmental humidity on the source determination.

[0046] S300, based on the trigger sequence, response change amplitude, and continuous rise time of each sampling point along the sampling arm arrangement direction in the sheath side correction sequence, determine the sheath advancement integrity, the advance amount of the first trigger moment of the sheath, and the continuous rise time of the sheath, and obtain the sheath source quantity.

[0047] It is understandable that the sheath source quantity is used to characterize the likelihood of moisture originating from the sheath side path during the current detection cycle, as well as whether the moisture continuously advances along the sheath sampling arm direction, whether the response changes significantly, and whether the response persists.

[0048] For example, the controller first reads the trigger status and trigger time of each first intermittent sampling end in the sheath-side correction sequence, then determines whether the sampling end closer to the cable inlet or the preset starting position is triggered earlier than the downstream sampling end, then identifies the degree of change of the response value of each sampling point relative to the trigger reference, and counts the length of time the response value is continuously higher than the corresponding trigger reference. After summarizing the above information, the sheath source quantity is generated.

[0049] In one possible implementation, please refer to Figure 4 S300, based on the trigger sequence, response change amplitude, and continuous rise time of each sampling point along the sheath sampling arm arrangement direction in the sheath-side correction sequence, determine the sheath advancement integrity, the advance of the first trigger moment of the sheath, and the continuous rise time of the sheath, and obtain the sheath source quantity, including: S310, determine the trigger sequence based on the order in which each sampling point in the sheath side correction sequence reaches the preset trigger condition, and determine the sheath advancement integrity based on the consistency between the trigger sequence and the arrangement of each sampling point along the sheath sampling arm direction.

[0050] For example, the time when each first intermittent sampling end first reaches the preset trigger condition can be recorded as the trigger time, and the trigger order can be formed according to the trigger time from early to late. If the trigger order is basically consistent with the physical arrangement order in the water channel propulsion direction on the sheath side, the sheath propulsion integrity is determined to be high; if only a few sampling points are triggered, or the trigger order is inconsistent with the arrangement direction, the sheath propulsion integrity is determined to be low. Then, the spatial continuity constraint source is used to judge, reducing misjudgments caused by local water droplets, residual water or noise.

[0051] S320, determine the lead time of the first triggering moment of the sheath based on the triggering time of the sampling point that first reaches the preset triggering condition in the triggering sequence.

[0052] For example, determining the lead time for the first triggering of the sheath can be achieved by comparing the triggering time of the first triggering sampling point on the sheath side with the first triggering time on the folded edge side, the detection cycle reference time, or the system's preset comparison time, and determining the lead time for the first triggering of the sheath based on the timing of the triggering on the sheath side. If the sampling point on the sheath side forms an effective triggering significantly earlier than the folded edge side or the reference time, the lead time for the first triggering of the sheath is larger, so as to reflect whether signs of moisture entry appear earlier on the sheath side path.

[0053] S330, determine the sheath continuous rise time based on the length of time the response value in the sheath-side correction sequence is continuously higher than the corresponding triggering reference.

[0054] For example, after the sampling point on the sheath side reaches the preset trigger condition, the controller continues to track the response changes of the sampling point and adjacent sampling points, and counts the length of time that the response value remains above the trigger reference and shows a continuous rise or maintains a high level. If the response only jumps briefly and then falls back quickly, the corresponding continuous rise time is relatively short; if multiple sampling points are in a high response state for a period of time, the corresponding continuous rise time is relatively long, which can distinguish between transient interference and continuous water ingress.

[0055] S340, based on the sheath advance integrity, the advance of the sheath first trigger moment, and the sheath continuous rise time, the sheath source quantity is obtained.

[0056] For example, the controller can combine the above three indicators according to preset judgment rules: when the sheath advance integrity is high, the sheath side triggers early and the continuous rise time is long, a higher sheath source quantity is determined; when only one of the three indicators meets the conditions, the sheath source quantity is reduced or marked as pending confirmation.

[0057] This configuration allows the sheath source quantity to simultaneously reflect three aspects: spatial advancement, temporal preemption, and continuity, avoiding the need to determine the source based solely on a single trigger point.

[0058] S400, based on the trigger sequence, response change amplitude, and continuous rise time of each sampling point along the folding sampling arm arrangement direction in the folding side correction sequence, determine the folding advancement integrity, the advance amount of the first triggering moment of the folding, and the continuous rise time of the folding, and obtain the folding source quantity.

[0059] It is understandable that the source volume of the folded edge is a source judgment data formed by comprehensively considering whether the water channel on the folded edge advances according to the expected path, whether the response is obvious, and whether the response is continuous.

[0060] For example, after obtaining the correction sequence on the folded side, the controller first establishes a list of sampling points according to the physical arrangement of each sampling point on the folded sampling arm, then reads the moment when each sampling point first meets the preset trigger condition, and determines whether the trigger moment matches the direction of the moisture on the folded side advancing from the inlet to the outlet. Based on the response changes of each sampling point before and after the trigger, the controller continues to observe whether it continues to rise or is higher than the corresponding trigger benchmark at subsequent sampling moments, thereby obtaining the folding advancement completeness, the advance amount of the first trigger moment of the folding, and the continuous rising time of the folding, and thus the folding source amount can be determined.

[0061] In one possible implementation, please refer to Figure 5 S400, based on the trigger sequence, response change amplitude, and continuous rise time of each sampling point along the folding sampling arm arrangement direction in the folding side correction sequence, determine the folding progress integrity, the advance of the first folding trigger moment, and the continuous rise time of the folding, and obtain the folding source quantity, including: S410, determine the trigger sequence based on the order in which each sampling point in the folded side correction sequence reaches the preset trigger condition, and determine the response change amplitude based on the change of the response value of each sampling point relative to the corresponding trigger reference.

[0062] For example, the controller may check each sampling point in chronological order to see if it meets the preset trigger condition, and record the time when the preset trigger condition is first met as the trigger time of that sampling point. For a sampling point that has been triggered, the controller compares its response value after triggering with the corresponding trigger reference and the stable response state before triggering to determine whether it is a slight change, a significant change or a continuously increasing change, thereby determining the magnitude of the response change. This can obtain the response information of the folded side with time sequence and change intensity, providing a basis for subsequent judgment on whether the folded waterway is actually advancing.

[0063] S420: Determine the completeness of the folding process based on the consistency between the trigger sequence and the arrangement of each sampling point along the folding sampling arm direction; and determine the advance amount of the first triggering time of the folding process based on the triggering time corresponding to the sampling point that first reaches the preset triggering condition.

[0064] It is understandable that the completeness of the folding advancement is used to indicate whether the triggering sequence conforms to the degree to which moisture gradually advances from the folding side inlet to the subsequent sampling points; the advance amount of the first triggering time of the folding is used to indicate the degree to which the earliest response on the folding side is advanced relative to the preset detection reference time, the time when the reference response of the same period begins to change, or the time when the response on the other side begins.

[0065] For example, the controller compares the determined trigger sequence with the pre-stored order of sampling points on the edge folding sampling arm. If the first sampling point, the second sampling point, the third sampling point, etc., are triggered in a sequence from near the edge folding entrance to far away from the edge folding entrance, the edge folding progress is considered to be of high integrity. If multiple sampling points are triggered simultaneously, in reverse, or there is a significant break in the middle, the edge folding progress is reduced. At the same time, the controller reads the trigger time of the first triggered sampling point and compares it with the reference time in the detection cycle to determine the advance amount of the first trigger time of the edge folding.

[0066] S430: Based on the duration of time during which the response value in the folding side correction sequence remains higher than the corresponding triggering reference, determine the continuous rising time of the folding, and obtain the folding source quantity based on the folding progress integrity, the advance of the first triggering moment of the folding, the response change amplitude, and the continuous rising time of the folding.

[0067] It can be understood that the continuous rise time of the folded edge refers to the length of time after the sampling point is triggered, its response value remains higher than the trigger reference and shows a continuous enhancement or stable high state; the more stable this time is, the more it usually indicates that there is continuous input or continuous wetting on the folded edge side.

[0068] For example, the controller calculates the duration for which the response value of each sampling point in the edge correction sequence remains above the corresponding trigger benchmark. The longest or average duration of this duration is taken as the edge rise time. The controller then uses the previously obtained edge advancement completeness, edge first trigger advance, response change amplitude, and edge rise time as four feature values. Weights are assigned to each dimension based on their importance in determining the water flow source. The feature values ​​are then weighted and summed, or comprehensively calculated using a preset logic judgment matrix, ultimately outputting the edge source quantity. The preset logic judgment matrix can be a set of judgment rules pre-stored in the controller, used to output the corresponding edge source quantity based on combinations of different feature dimensions, adapting to the judgment requirements of different humidity levels and different water inlet scenarios.

[0069] This setting allows for the inclusion of spatial advancement, time advance, response intensity, and continuity in the judgment, making the source quantity of the folded edge more closely resemble the actual water source state.

[0070] S500, the common mode anomaly is obtained based on the synchronous change amplitude of two reference response sequences, the sheath side correction sequence, and the folded edge side correction sequence.

[0071] It is understandable that the amplitude of synchronous changes reflects the similarity of fluctuations in the two reference sequences within the same time period. Common mode anomalies are used to characterize the degree to which both sides are simultaneously affected by the same disturbances or anomalous factors.

[0072] For example, the controller can analyze the synchronous change amplitude of two reference response sequences within the same detection cycle to determine whether there is a global interference. Then, it retrieves the sheath-side correction sequence and the folded-edge-side correction sequence to check whether there are abnormal triggers on both sides that fail to form a normal propulsion relationship. Finally, it combines the synchronous change amplitude and the abnormal propulsion in the correction sequences on both sides, and calculates a common-mode anomaly quantity representing a global or bilateral simultaneous anomaly through logical judgment. This can effectively identify and quantify the impact of external environmental changes or common system faults on the sensors on both sides, avoid misjudging common interference as a single-sided waterway anomaly, and improve the accuracy of source determination.

[0073] In one possible implementation, please refer to Figure 6 S500, based on the synchronous change amplitude of two reference response sequences, the sheath-side correction sequence, and the folded-edge correction sequence, obtains the common-mode anomaly, including: S510 determines the synchronous change amplitude based on the consistency of the change amplitude and change direction of the two reference response sequences within the same detection period.

[0074] For example, consistency in the direction of change means that both exhibit fluctuations of increasing, decreasing, or the same trend. Specifically, the two reference response sequences are first aligned according to their sampling times, and then their changes relative to their respective stable references are read. If the two sequences increase or decrease simultaneously within a similar time period, the controller uses the common change portion as the main basis for synchronous change. If one sequence increases while the other decreases, or only one sequence shows an isolated spike, the controller reduces the effectiveness of the synchronous change amplitude, thereby enabling the identification of background changes truly caused by common factors and avoiding mistaking occasional anomalies in a single reference channel for common-mode anomalies.

[0075] S520, determine the missing state of the advance of the sheath side correction sequence based on whether the sampling points in the sheath side correction sequence have not formed a trigger sequence relationship consistent with the arrangement direction of the sheath sampling arms, and determine the missing state of the advance of the folding side correction sequence based on whether the sampling points in the folding side correction sequence have not formed a trigger sequence relationship consistent with the arrangement direction of the folding sampling arms.

[0076] It is understandable that the missing state refers to a situation where, although the sampling points may show changes in response, these changes do not occur sequentially according to the spatial arrangement direction of the corresponding sampling arms.

[0077] For example, the sampling points of the sheath sampling arm and the folded edge sampling arm can be arranged in order, and the triggering time of the sampling points in their respective correction sequences can be compared with the arrangement order. If the sampling points on one side are triggered simultaneously, randomly, in the opposite direction, or only an isolated sampling point is triggered briefly, the controller marks that side as lacking propulsion. If the sampling points on that side are triggered continuously along the sampling arm direction, it is not marked as lacking propulsion. This can provide a directional exclusion basis for common mode anomaly judgment, so that the system will not misjudge the overall fluctuation lacking spatial propulsion characteristics as water entering from one side.

[0078] S530, based on the synchronous change amplitude, the advance missing state of the sheath side correction sequence, and the advance missing state of the folded edge side correction sequence, the common mode anomaly quantity is obtained.

[0079] For example, the common-mode anomaly is used to indicate the probability of detecting a change in ambient humidity or a common anomaly between the sensors on both sides. The greater the synchronous change amplitude and the clearer the missing state of the advancement on both sides, the higher the common-mode anomaly. The common-mode anomaly can be obtained by checking the missing state of the advancement on the sheath side and the folded edge side when the synchronous change amplitude is large. If both sides lack a trigger sequence relationship consistent with the arrangement direction of the sampling arms, the controller will obtain a high common-mode anomaly. If a clear directional advancement has been formed on one side, the controller will reduce the impact of the common-mode anomaly on the source judgment of that side. If the synchronous change of the two reference response sequences is weak, even if the lateral advancement is not obvious, a high common-mode anomaly will not be obtained directly.

[0080] S600 obtains water source determination data based on sheath source quantity, folded edge source quantity, and common mode anomaly quantity.

[0081] Specifically, the water source determination data is the final decision result used to indicate the specific source of the water source anomaly. This data can be obtained by first determining which side, the sheath side or the folded edge side, has a greater directional propulsion advantage after obtaining the sheath source quantity, the folded edge source quantity, and the common-mode anomaly quantity. Then, it is determined whether the common-mode anomaly is strong enough to cover the lateral source characteristics. When the sheath source quantity is significantly dominant and the common-mode anomaly is not dominant, a sheath-side source determination is output; when the folded edge source quantity is significantly dominant and the common-mode anomaly is not dominant, a folded edge-side source determination is output; and when the common-mode anomaly is dominant, a common-mode anomaly or source uncertainty determination is output.

[0082] This setup allows for the processing of local waterway propulsion and overall disturbance within the same judgment framework, resulting in a more complete final judgment.

[0083] In one possible implementation, please refer to Figure 7 S600, based on the sheath source quantity, folded edge source quantity, and common mode anomaly quantity, obtains water channel source determination data, including: S610, based on the sheath source quantity and the folded edge source quantity, obtain the lateral source difference value; wherein, the lateral source difference value is used to indicate the degree of difference between the sheath source quantity and the folded edge source quantity.

[0084] For example, the controller can adjust the sheath source quantity and the folded edge source quantity to the same judgment scale, such as using low, medium, high or the same strength level to represent them, and then compare their magnitudes; if the sheath source quantity is significantly higher than the folded edge source quantity, a lateral source difference value pointing to the sheath side is generated; if the folded edge source quantity is significantly higher than the sheath source quantity, a lateral source difference value pointing to the folded edge side is generated; if the two are close, a state with no obvious lateral difference is generated. This can form a clear lateral comparison result before entering the final judgment, avoiding confusion in the judgment logic when directly facing multiple source quantities later.

[0085] S620, based on the relationship between the common mode anomaly quantity and the sheath source quantity and the edge folding source quantity respectively, the common mode dominance relationship is obtained; wherein, the common mode dominance relationship is used to indicate the degree of dominance of the common mode anomaly quantity relative to the sheath source quantity and the edge folding source quantity.

[0086] For example, the common-mode anomaly can be compared with the sheath source quantity and the folded edge source quantity respectively. If the common-mode anomaly is higher than or significantly close to the source quantities on both sides, and there is no stable directional advancement on both sides, then the common-mode is determined to be dominant. If the common-mode anomaly is lower than the source quantity on one side, and that side has continuous triggering and continuous rising characteristics, then the source on that side is determined to be superior to the common-mode anomaly. If both the common-mode anomaly and the lateral source quantity are high, then it is determined to be a mixed dominant state or a state that needs to be verified. This can prevent the common fluctuations of the environment from masking the true lateral source, and can also prevent the overall disturbance from being mistakenly attributed to the sheath side or the folded edge side.

[0087] S630 determines the water source determination data based on the lateral source difference and common mode dominance relationship.

[0088] It is understandable that, based on the lateral source difference and the common mode dominance relationship, the system determines whether the common mode dominance relationship is strongly dominant. If so, it directly generates water source determination data indicating common mode anomalies. If the common mode anomaly is not dominant, it further determines whether the lateral source difference exceeds a preset difference threshold. If the difference exceeds the threshold, it indicates that the source quantity on one side is significantly greater than that on the other side, and the sheath side or folded edge side anomaly determination data is determined for the side with the larger source quantity. If the common mode is not dominant and the lateral source difference is small, it indicates that there are slight anomalies on both sides, and the determination data for slight anomalies on both sides is determined.

[0089] This configuration, through layered and progressive logical judgment, takes into account both common-mode interference and lateral local anomalies, making the final output water source determination data more consistent with actual working conditions, effectively improving the accuracy and practicality of water path anomaly diagnosis.

[0090] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0091] This application also provides a controller. Figure 8 This is a schematic diagram of the controller provided in one embodiment of this application. Figure 8 As shown, the controller 6 in this embodiment includes: at least one processor 60 ( Figure 8 Only one is shown in the image), at least one memory 61 ( Figure 8 (Only one is shown in the image) and a computer program 62 stored in the at least one memory 61 and executable on the at least one processor 60, wherein when the processor 60 executes the computer program 62, it causes the controller 6 to perform the steps in any of the above embodiments of the water source determination method for waterproof cable branch boxes.

[0092] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A waterproof cable branch box, characterized in that, include: The enclosure has a cable inlet for cables to pass through; An inlet sealing assembly is installed inside the cable inlet and forms a circumferential sealing fit between the hole wall of the cable inlet and the outer sheath of the cable. A dual-path isolation sampling device is installed inside the enclosure and near the cable inlet; the dual-path isolation sampling device includes a sheath sampling arm close to the outer sheath, a folded edge sampling arm located at the lower edge of the folded edge of the enclosure, and a water-proof ridge between the two sampling arms; the dual-path isolation sampling device is used to independently collect the responses of the sheath-side water path and the folded edge-side water path before water merges, and the water-proof ridge reduces the risk of lateral crosstalk between the two water paths; A dual-cavity reference component is disposed adjacent to and fixed relative to the dual-path isolation sampling component; the dual-cavity reference component includes two blind-end reference cavities corresponding to the sheath sampling arm and the folded-edge sampling arm respectively, and the two blind-end reference cavities are separated by a hydrophobic partition wall to provide a comparable environmental drift reference. as well as A low-position check valve is installed at the moisture outlet of the dual-path isolation sampling device and corresponds to the moisture outlet ends of the sheath sampling arm and the folded edge sampling arm, respectively. The low-level backflow prevention device includes two isolation inlet sections corresponding to the sheath sampling arm and the folded edge sampling arm, respectively. A backflow prevention partition is provided between the two isolation inlet sections to receive and treat the two streams of moisture in a separate area, and to reduce the risk of lateral water cross-contamination and residual misjudgment at the low level.

2. The waterproof cable branch box as described in claim 1, characterized in that, The sheath sampling arm and the folded edge sampling arm are respectively arranged circumferentially at intervals along the cable inlet, and the water-proof ridge extends along the interval area between the sheath sampling arm and the folded edge sampling arm to restrict the sheath-side water path and the folded edge-side water path within their respective sampling paths.

3. The waterproof cable branch box as described in claim 1, characterized in that, The two blind-end reference cavities are adjacent to the sheath sampling arm and the folded-edge sampling arm, respectively, but are not in direct liquid communication. The opening of each blind-end reference cavity is oriented toward the corresponding sampling arm, so that the blind-end reference cavity can obtain the changes in ambient humidity near the corresponding sampling path and prevent the sampling water from entering.

4. The waterproof cable branch box as described in claim 1, characterized in that, The two isolation inlet sections are respectively connected to the moisture outlet ends of the sheath sampling arm and the folded edge sampling arm. The check valve extends along the separation area between the two isolation inlet sections to restrict the backflow or lateral communication of moisture in either isolation inlet section to the other isolation inlet section.

5. The waterproof cable branch box as described in claim 1, characterized in that, The sheath sampling arm is provided with a first intermittent sampling end arranged at intervals along the water channel propulsion direction on the sheath side, the folded edge sampling arm is provided with a second intermittent sampling end arranged at intervals along the water channel propulsion direction on the folded edge side, and the two blind end reference cavities are respectively provided with reference sampling ends.

6. A method for determining the water source of a waterproof cable branch box, applied to the waterproof cable branch box according to any one of claims 1 to 5, characterized in that, The method includes: During the testing period, the response sequence on the sheath side, the response sequence on the folded edge side, and two reference response sequences were determined. Based on the common change of the two reference response sequences within the same detection period, the environmental drift is determined, and the environmental drift is used to correct the sheath-side response sequence and the folded-edge response sequence respectively, to obtain the sheath-side correction sequence and the folded-edge correction sequence. Based on the trigger sequence, response change amplitude, and continuous rise time of each sampling point in the sheath side correction sequence along the arrangement direction of the sheath sampling arm, the sheath propulsion integrity, the advance amount of the first trigger moment of the sheath, and the continuous rise time of the sheath are determined, and the sheath source quantity is obtained. Based on the trigger sequence, response change amplitude, and continuous rise time of each sampling point in the folding side correction sequence along the folding sampling arm arrangement direction, determine the folding progress integrity, the advance amount of the first triggering moment of the folding, and the continuous rise time of the folding, and obtain the folding source amount; The common-mode anomaly is obtained based on the synchronous change amplitude of the two reference response sequences, the sheath-side correction sequence, and the folded-edge correction sequence; Water source determination data is obtained based on the sheath source quantity, the folded edge source quantity, and the common mode anomaly quantity.

7. The method for determining the water source of a waterproof cable branch box as described in claim 6, characterized in that, The determination of sheath propulsion integrity, sheath initial trigger time advance, and sheath continuous rise time based on the trigger sequence, response change amplitude, and continuous rise time of each sampling point along the arrangement direction of the sheath sampling arm in the sheath-side correction sequence, and the resulting sheath source quantity, includes: The trigger sequence is determined based on the order in which each sampling point in the sheath side correction sequence reaches the preset trigger condition, and the sheath advancement completeness is determined based on the consistency between the trigger sequence and the arrangement of each sampling point along the sampling arm of the sheath. Based on the triggering time corresponding to the sampling point that first reaches the preset triggering condition in the triggering sequence, the advance amount of the first triggering time of the sheath is determined; The duration of the sheath's continuous rise is determined based on the length of time during which the response value in the sheath-side correction sequence remains higher than the corresponding trigger reference. The amount of sheath source is obtained based on the sheath propulsion integrity, the advance of the sheath's first trigger moment, and the sheath's continuous ascent time.

8. The method for determining the water source of a waterproof cable branch box as described in claim 6, characterized in that, The determination of the folding progress completeness, the advance amount of the first folding trigger moment, and the folding continuous rise time based on the triggering sequence, response change amplitude, and continuous rise time of each sampling point along the folding sampling arm arrangement direction in the folding side correction sequence, and the resulting folding source quantity, includes: The trigger sequence is determined based on the order in which each sampling point in the folded side correction sequence reaches the preset trigger condition, and the response change amplitude is determined based on the change of the response value of each sampling point relative to the corresponding trigger reference. The degree of consistency between the trigger sequence and the arrangement of each sampling point along the folding sampling arm direction is used to determine the folding progress completeness, and the advance amount of the first triggering time of the folding is determined according to the triggering time corresponding to the sampling point that first reaches the preset triggering condition. The duration of the continuous rise of the folded edge is determined based on the length of time the response value in the folded edge correction sequence is higher than the corresponding triggering reference. The folded edge source quantity is obtained based on the folded edge progress integrity, the advance amount of the first triggering moment of the folded edge, the response change amplitude, and the folded edge continuous rise time.

9. The method for determining the water source of a waterproof cable branch box as described in claim 6, characterized in that, The process of obtaining the common-mode anomaly based on the synchronous change amplitudes of the two reference response sequences, the sheath-side correction sequence, and the folded-edge correction sequence includes: The synchronous change amplitude is determined based on the consistency of the change amplitude and change direction of the two reference response sequences within the same detection period; Based on whether each sampling point in the sheath-side correction sequence does not form a trigger sequence relationship consistent with the arrangement direction of the sheath sampling arms, the advancement missing state of the sheath-side correction sequence is determined; and based on whether each sampling point in the folded-edge correction sequence does not form a trigger sequence relationship consistent with the arrangement direction of the folded-edge sampling arms, the advancement missing state of the folded-edge correction sequence is determined. The common mode anomaly is obtained based on the synchronous change amplitude, the advancement missing state of the sheath-side correction sequence, and the advancement missing state of the folded-edge correction sequence.

10. The method for determining the water source of a waterproof cable branch box as described in claim 6, characterized in that, The process of obtaining water source determination data based on the sheath source quantity, the folded edge source quantity, and the common mode anomaly quantity includes: Based on the sheath source quantity and the folded edge source quantity, a lateral source difference is obtained; wherein, the lateral source difference is used to indicate the degree of difference between the sheath source quantity and the folded edge source quantity; Based on the relationship between the common mode anomaly quantity and the sheath source quantity and the edge folding source quantity, a common mode dominance relationship is obtained; wherein, the common mode dominance relationship is used to indicate the degree of dominance of the common mode anomaly quantity relative to the sheath source quantity and the edge folding source quantity; The water source determination data is determined based on the lateral source difference and the common mode dominance relationship.

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