Electric leakage detection device and method for computing power server case

Abstract

The invention discloses a computing power server case electric leakage detection device and method, and the device comprises a plurality of convergence modules which are installed in at least one or more functional regions of the inner wall of a computing power server case; the convergence module at least comprises a functional body matched with the shape of the functional area; and the central monitoring and processing module is electrically connected with and controls the track driving unit and the mobile sensing assembly. All corners and key areas in the server can be covered according to requirements, weak leakage currents occurring at the corners of a case are captured and collected, and therefore detection blind areas are eliminated, and the potential fault detection and early warning capacity is improved; the detection signal of the mobile sensing assembly and the real-time position of the mobile sensing assembly on the track are synchronously analyzed through the central processing module, and a fault can be attributed to a specific convergence module, so that the physical compatibility contradiction is reduced, the adaptation range is wider, and electric leakage detection can be stably carried out on the case.

Description

Technical Field

[0001] This invention relates to the field of leakage testing technology, and in particular to a leakage current detection device and method for a computing server chassis. Background Technology

[0002] As the core equipment for modern data centers, artificial intelligence training, and cloud computing services, computing servers are becoming increasingly integrated, power-consuming, and complex. Servers house a large number of electronic components. Due to their extremely high power density, component integration, and 24 / 7 uninterrupted operation, their internal insulation materials are more prone to degradation under the combined effects of thermal stress, vibration, and electrical stress. This degradation can be caused by factors such as component aging, cable insulation wear, changes in environmental humidity, and dust accumulation. Even small leakage currents can eventually develop into significant grounding faults or internal short circuits, leading to critical business interruptions and incalculable data loss.

[0003] In existing solutions, such as residual current devices installed on the main power supply circuit, their function is more inclined towards "protection" than "testing". They only make threshold judgments on the cumulative leakage current flowing through the main circuit. They cannot detect local, weak leakage currents that occur inside the chassis, such as those far below the main circuit protection threshold, and have a test blind zone. Similarly, sensors arranged in a point pattern can only test the leakage current at the points they cover, and cannot form a comprehensive test solution for the entire inner wall of the chassis.

[0004] Furthermore, when leakage is detected, it is difficult to provide information about the location of the fault source. Inside the server, it is difficult to find the specific leakage component from potential risk points. Moreover, the existing detection methods are relatively fixed. How to set up the testing equipment so that it can achieve comprehensive testing without affecting the original performance of the server is a pressing need. Therefore, there is an urgent need for a leakage detection device and method for computing server chassis. Summary of the Invention

[0005] The purpose of this invention is to address the deficiencies in the existing technology by proposing a leakage current detection device and method for computing server chassis.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A leakage current detection device for a computing server chassis, applied inside the computing server chassis, includes: Multiple convergence modules are installed in at least one or more functional areas on the inner wall of the computing server chassis; The bus module includes at least: a functional body that adapts to the shape of the functional area; A conductive collection area embedded within the functional body is used to capture and guide leakage current to one or more inductive interaction areas on the functional body within its coverage area. At least one motion sensing component, the motion sensing component including at least one non-contact leakage current sensor; The track drive unit includes a track laid along a predetermined trajectory, a sliding vehicle that carries a motion sensing component and cooperates with the track, and a drive mechanism that drives the sliding vehicle. The predetermined trajectory of the track passes through the sensing interaction area. The central monitoring and processing module is electrically connected to and controls the track drive unit and motion sensing components. The central monitoring and processing module is used for: The track drive unit is controlled to drive the motion sensing component to perform scanning motion along the track; Synchronously receive the detection signal generated by the mobile sensing component when it passes through the sensing interaction area; Based on the detection signal and the location information of the motion sensing component, it is determined whether there is a leak and the bus module where the leak occurs is identified. When it is determined that there is a leak exceeding the threshold, an alarm signal is output.

[0007] Furthermore, the combiner module is mounted on the mounting base plate, which is provided with a positioning structure corresponding to the combiner module; The mounting base plate is also equipped with an electrical connector corresponding to each bus module. When the bus module is installed in the positioning structure, the electrical signal on the bus module is electrically connected to the internal circuit of the mounting base plate through the electrical connector.

[0008] Furthermore, the track is a semi-sealed guide rail, which is integrated into the side wall of the chassis. The drive mechanism is installed inside the guide rail and drives the sliding vehicle to move through a linear electromagnetic drive.

[0009] Furthermore, the drive mechanism includes multiple electromagnetic blocks arranged at intervals along the movement trajectory and electromagnetic shafts that cooperate with the electromagnetic blocks. The electromagnetic shafts are mounted on the sliding carrier. At least two electromagnetic blocks are grouped together, and adjacent electromagnetic blocks in each group are independently energized and controlled. By energizing the electromagnetic blocks in sequence, the sliding carrier is driven to move linearly along the track.

[0010] Furthermore, calibration reference points are set on the track; The mobile sensing component periodically passes through the calibration reference point during the scanning process, enabling online self-calibration or functional diagnosis of the non-contact leakage current sensor.

[0011] Furthermore, the sensing interaction area is provided with an enhancement structure, which is one of the following: a U-shaped bend, a spiral coil, or a planar eddy current enhancement structure.

[0012] Furthermore, the track drive unit is also equipped with a position sensing unit to obtain the position of the sliding vehicle on the track in real time; The position sensing unit is a linear encoder or a magnetic position marker, wherein the magnetic position marker works in conjunction with a reader configured on a sliding carrier.

[0013] Furthermore, the central monitoring and processing module is also used to control the track drive unit to drive the movement of the motion sensing components according to preset strategies, including: constant speed inspection, variable speed or dwell detection in specific sensing interaction areas, and periodic reciprocating scanning.

[0014] A method for detecting leakage current in a computing server chassis, based on the aforementioned leakage current detection device for a computing server chassis, includes the following steps: Step S1: When leakage current occurs inside the computing server chassis, the leakage current is captured and guided to the sensing interaction area of ​​at least one of the multiple bus modules through the conductive collection area of ​​the bus module. Step S2: The central monitoring and processing module controls the track drive unit to drive the motion sensing component to scan along the track. When the motion sensing component passes through the sensing interaction area, its non-contact leakage current sensor detects the physical field change generated by the leakage current in the interaction area and generates a detection signal. Step S3: The central monitoring and processing module synchronously acquires the real-time location information and detection signals of the mobile sensing components, and determines the busbar module where the leakage occurred and the degree of leakage based on the amplitude and location of the detection signal. When the leakage exceeds the preset threshold, an alarm signal is output.

[0015] Furthermore, following step S3, step S301 is further included: Upon initial leak detection, the central monitoring and processing module alters its motion control strategy to drive the motion sensing component to perform a low-speed, high-frequency fine-grained scan near the sensing interaction area of ​​the identified drain module, in order to obtain more detailed leak characteristic data.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: Through multiple bus modules, a static capture area that fits the contour of the inner wall of the chassis can be constructed. It can cover various corners and key areas inside the server as needed, capture and collect weak leakage currents occurring in the corners of the chassis, thereby eliminating detection blind spots and improving the ability to detect and warn of potential faults. By synchronously analyzing the detection signals of the motion sensing components and their real-time position on the track through the central processing module, faults can be attributed to a specific busbar module, thereby providing fault location guidance, shortening fault diagnosis time and server downtime. In addition, dynamic scanning can be achieved through the track and motion sensing components, and leakage detection can be performed step by step according to the preset path and measurement. By periodically checking a known standard signal, the accuracy and reliability of the test system in long-term operation are ensured, thereby achieving regular early warning and detection. The modular mounting base and three-dimensional busbar module also make the overall layout not occupy additional effective space and not disturb the key heat dissipation airflow, thereby reducing physical compatibility conflicts, making it more adaptable, and enabling stable leakage detection of the chassis. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0018] Figure 1 This is one of the overall structural schematic diagrams of the leakage current detection device for the computing server chassis proposed in this invention; Figure 2 This is the second schematic diagram of the overall structure of the computing server chassis leakage current detection device proposed in this invention; Figure 3 This is a schematic diagram of the track drive unit of the leakage current detection device for the computing server chassis proposed in this invention; Figure 4 This is a schematic diagram of the sidewall installation of the busbar module in the leakage current detection device for the computing server chassis proposed in this invention; Figure 5 This is a flowchart illustrating the leakage current detection method for the computing server chassis proposed in this invention.

[0019] In the diagram: 100, Busbar Module; 110, Functional Body; 120, Conductive Collection Area; 130, Sensing Interaction Area; 200, Motion Sensing Component; 210, Non-Contact Leakage Current Sensor; 300, Track Drive Unit; 310, Track; 320, Sliding Carrier; 330, Drive Mechanism; 331, Electromagnetic Block; 332, Electromagnetic Shaft; 340, Calibration Reference Point; 400, Central Monitoring and Processing Module. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Reference Figure 1-4 Example 1: A leakage current detection device for a computing server chassis is applied inside the computing server chassis and includes: multiple bus modules 100, at least one motion sensing component 200, a track drive unit 300, and a central monitoring and processing module 400.

[0023] Multiple busbar modules 100, acting as static targets, are pre-installed in key areas on the inner wall of the server chassis. These modules are responsible for capturing potential leakage current over a large area and converging it into specific "sensing interaction zones." A motion sensing component 200, acting as a dynamic inspection probe, is driven by a track drive unit 300 to precisely and periodically "scan" each sensing interaction zone along a preset trajectory. When the motion sensing component 200 passes through a sensing interaction zone, a highly sensitive non-contact sensor can detect the subtle changes in the physical field caused by the leakage current. The central monitoring and processing module 400 controls the track drive unit 300 to drive the motion sensing component 200 to perform scanning motion, and simultaneously receives its detection signals and position information. Through comprehensive analysis, it determines whether leakage has occurred and can accurately locate the specific bus module where leakage has occurred, thereby realizing alarm and fault location.

[0024] Example 2: The bus module 100 is used to capture and collect leakage current. Each bus module 100 includes a functional body 110 and an embedded conductive collection area 120. In a specific implementation, the functional body 110 is preferably made of engineering plastic or ceramic material that is resistant to high temperature, has excellent insulation properties and is easy to mold, and is made into a shell with a specific three-dimensional geometry. The shape can conformally fit the contour of the inside of the server chassis, for example: in an L-shape to fit the corner of the chassis, or in a large area of ​​thin plate to cover the motherboard or chassis wall near the CPU, GPU or power module.

[0025] The conductive collection area 120 is embedded or integrally formed inside or on the surface of the functional body 110. It is composed of weakly conductive materials, such as conductive silver paste or carbon nanotube composite materials, and forms a current collection network. When leakage occurs in the area covered by the module, the current will preferentially flow through this network and be guided to one or more sensing interaction areas 130.

[0026] The sensing interaction area 130 is provided with an enhancement structure to enhance the detection signal of the motion sensing component 200. Specifically, the conductive path of the sensing interaction area 130 is designed as a planar eddy current enhancement structure, which can generate a relatively stronger and more concentrated magnetic field in the local space when a weak leakage current flows through, thereby improving the signal-to-noise ratio and detection sensitivity of the non-contact sensor.

[0027] In further implementation, The device also includes a mounting base plate, which enables the positioning and electrical connection of multiple independent bus modules 100 when directly mounted on the inner wall of the chassis. During installation, only one base plate needs to be installed in a predetermined area on the inner wall of the chassis. Subsequently, one or more bus modules 100 can be quickly installed onto the base plate in a plug-and-play manner, similar to installing memory modules or CPUs. In one specific embodiment, the mounting base plate is made of multilayer printed circuit board material such as FR-4, making it both a mechanical load-bearing structure and an electrical connection motherboard. The mounting base plate has positioning structures corresponding to the bus modules (100). These positioning structures are recessed slots that match the bottom shape of the bus modules (100), and L-shaped positioning brackets are provided at the edges of the slots. When the bus module 100 is inserted, it ensures that it is guided to the uniquely correct installation position and orientation. Furthermore, each positioning structure of the mounting base plate contains an electrical connector corresponding to the bus module (100). In a preferred embodiment, the electrical connector can be a set of spring pin contacts. Correspondingly, each bus module (100) has a flat, wear-resistant gold-plated contact pad at the bottom. When the bus module 100 is pressed into the positioning structure and locked, the contact pad at the bottom will be precisely aligned with the spring pin on the substrate and form a reliable electrical contact. Through the wiring inside the PCB, the signals from all electrical connectors are gathered and uniformly led to a main output interface at the edge of the substrate. The central monitoring and processing module 400 only needs to be connected to the main output interface through a single cable to establish communication with all bus modules 100, thereby simplifying the wiring inside the server chassis.

[0028] Example 3: Track 310 is a semi-sealed guide rail, which is fixed to the inner wall of the chassis or a specific inner lining plate by screws or clips. The semi-sealed structure can prevent dust or foreign objects inside the server from entering the track and affecting the smooth operation of the sliding carrier 320.

[0029] The drive mechanism 330 is preferably a linear electromagnetic drive structure. In one specific embodiment, the drive mechanism 330 includes multiple electromagnetic blocks 331 that are sequentially spaced along the moving trajectory of the track 310. The electromagnetic blocks 331 are divided into multiple groups, each group containing at least two, and their power supply is independently controlled by the central monitoring and processing module 400. By sequentially energizing different groups of electromagnetic blocks 331 according to a specific timing and phase sequence, a linearly moving electromagnetic field can be generated, driving the electromagnetic shaft 332 with permanent magnet characteristics fixed on the sliding carrier 320, thereby achieving precise and smooth linear drive of the sliding carrier 320.

[0030] Furthermore, a position sensing unit is also included in the further implementation; In practice, the position sensing unit is a linear magnetic scale attached to one side of the track 310, and a corresponding magnetic reader is installed on the sliding carrier 320. When the sliding carrier 320 moves, the reader reads the position information of the magnetic scale in real time and feeds it back to the central monitoring and processing module 400, thereby achieving sub-millimeter level precise positioning.

[0031] Example 4: The motion sensing component 200 is fixed on the sliding carrier 320. Specifically, a non-contact leakage current sensor 210 is adopted. Depending on different requirements, the non-contact leakage current sensor 210 is selected from one or more combinations of tunnel magnetoresistive sensors, anisotropic magnetoresistive sensors, giant magnetoresistive sensors, high-sensitivity Hall effect sensors or miniature Rogowski coils to detect the weak magnetic field changes generated by leakage current in the sensing interaction area 130.

[0032] A calibration reference point 340 is also provided on the track 310. The calibration reference point 340 is a built-in micro-current source that can be controlled by the central monitoring and processing module 400. This current source is connected to a calibration interaction area with the same structure as the ordinary sensing interaction area 130. During the scanning process, the moving sensing component 200 will periodically pass through the calibration reference point 340. When the central monitoring and processing module 400 controls its passage, it will turn on the micro-current source, so that the sensor 210 can detect a known, standard analog leakage signal. By comparing the detected value with the standard value, the sensor 210 can be self-calibrated or functionally diagnosed online, thereby improving the reliability of the entire system.

[0033] Example 5: The central monitoring and processing module 400 consists of a microcontroller and corresponding peripheral circuits, used to perform basic drive control and signal acquisition, and to implement intelligent scanning strategies and diagnostic functions.

[0034] During normal operation, the central monitoring and processing module 400 sends control commands to the track drive unit 300 to drive the motion sensing component 200 to execute a preset scanning strategy, which includes, but is not limited to: A "constant speed inspection" mode covering the entire interactive area; A mode that reduces speed or briefly resides at the bus modules corresponding to high-risk components such as the CPU and power supply. Alternatively, a "periodic reciprocating scan" mode can be performed between the two ends of the chassis.

[0035] The present invention also provides a corresponding leakage current detection method, the steps of which correspond to the workflow of the leakage current detection device for computing server chassis.

[0036] Reference Figure 5 A method for detecting leakage current in a computing server chassis, comprising the following steps: The leakage current is captured and guided to the sensing interaction area 130 of at least one of the multiple busbar modules 100 through the conductive collection area 120 of the busbar module 100. Scanning and sensing steps: The central monitoring and processing module 400 controls the track drive unit 300 to drive the motion sensing component 200 to scan along the track 310. When the motion sensing component 200 passes through the sensing interaction area 130, its non-contact leakage current sensor 210 detects the physical field change generated by the leakage current in the interaction area and generates a detection signal. Location and alarm steps: The central monitoring and processing module 400 synchronously acquires the real-time location information and detection signal of the motion sensing component 200, and determines the leakage of the bus module 100 and the degree of leakage based on the amplitude and location of the detection signal, and outputs an alarm signal when the leakage exceeds the preset threshold.

[0037] When the leakage current detection device of the computing server chassis initially determines that a certain bus module has a leakage current through its basic scanning and sensing steps and positioning and alarm steps, the central monitoring and processing module 400 automatically starts the diagnostic scanning step. In this step, the central monitoring and processing module 400 changes the motion control command sent to the track drive unit 300 to drive the motion sensing component 200 to no longer perform a global scan, but instead focus on the sensing interaction area near the bus module with leakage current, and perform a reciprocating fine scan at a lower speed and a higher data sampling frequency to obtain more detailed dynamic characteristic data of the leakage current, such as current waveform and fluctuation frequency, and provide strong data support for further judging the cause of the fault, such as judging whether it is a stable insulation failure or an intermittent arc discharge, thereby realizing the functional upgrade from positioning to diagnosis.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A leakage current detection device for a computing server chassis, applied inside a computing server chassis, characterized in that, include: Multiple convergence modules (100) are installed in at least one or more functional areas on the inner wall of the computing server chassis; The bus module (100) includes at least: a functional body (110) that adapts to the shape of the functional area. A conductive collection area (120) is embedded within the functional body (110), the conductive collection area (120) being used to capture and guide leakage current within its coverage area to one or more inductive interaction areas (130) on the functional body (110). At least one motion sensing component (200), the motion sensing component (200) including at least one non-contact leakage current sensor (210); The track drive unit (300) includes a track (310) laid along a predetermined trajectory, a sliding vehicle (320) that carries the motion sensing component (200) and cooperates with the track (310), and a drive mechanism (330) that drives the sliding vehicle (320). The predetermined trajectory of the track (310) passes through the sensing interaction area (130). A central monitoring and processing module (400) is electrically connected to and controls the track drive unit (300) and the motion sensing component (200). The central monitoring and processing module (400) is used for: The track drive unit (300) is controlled to drive the motion sensing component (200) to perform scanning motion along the track (310); The detection signal generated by the motion sensing component (200) when it passes through the sensing interaction area (130) is received synchronously. Based on the detection signal and the location information of the motion sensing component (200), it is determined whether there is a leak and the busbar module (100) where the leak occurs is identified, and an alarm signal is output when it is determined that there is a leak exceeding the threshold.

2. The leakage current detection device for a computing server chassis according to claim 1, characterized in that, The combiner module (100) is installed on the inner wall of the computing server chassis via a mounting base plate, and the mounting base plate is provided with a positioning structure corresponding to the combiner module (100). The mounting base plate is also provided with an electrical connector corresponding to each of the busbar modules (100). When the busbar module (100) is installed on the positioning structure, the electrical signal on the busbar module (100) is electrically connected to the internal circuit of the mounting base plate through the electrical connector.

3. The leakage current detection device for a computing server chassis according to claim 1, characterized in that, The track (310) is a semi-sealed guide rail, which is integrated into the side wall of the chassis. The drive mechanism (330) is installed inside the guide rail and drives the sliding carrier (320) to move through a linear electromagnetic drive.

4. The leakage current detection device for a computing server chassis according to claim 3, characterized in that, The drive mechanism (330) includes a plurality of electromagnetic blocks (331) arranged at intervals along the movement trajectory and an electromagnetic shaft (332) that cooperates with the electromagnetic blocks (331). The electromagnetic shaft (332) is mounted on the sliding carrier (320). At least two electromagnetic blocks (331) are grouped together. Adjacent electromagnetic blocks (331) in each group are independently energized and controlled. By energizing the electromagnetic blocks (331) in sequence, the sliding carrier (320) is driven to move linearly along the track (310).

5. The leakage current detection device for a computing server chassis according to claim 4, characterized in that, A calibration reference point (340) is provided on the track (310); The motion sensing component (200) periodically passes through the calibration reference point (340) during the scanning process to perform online self-calibration or functional diagnosis of the non-contact leakage current sensor (210).

6. The leakage current detection device for a computing server chassis according to claim 5, characterized in that, The track drive unit (300) is also configured with a position sensing unit for real-time acquisition of the position of the sliding vehicle (320) on the track (310); The position sensing unit is a linear encoder or a magnetic position marker, wherein the magnetic position marker works in conjunction with a reader disposed on the sliding carrier (320).

7. A method for detecting leakage current in a computing server chassis, implemented based on the computing server chassis leakage current detection device according to any one of claims 1 to 6, characterized in that, Includes the following steps: Step S1: When leakage current occurs inside the computing server chassis, the leakage current is captured and guided to the sensing interaction area (130) of at least one of the multiple busbar modules (100) through the conductive collection area (120). Step S2: The central monitoring and processing module (400) controls the track drive unit (300) to drive the motion sensing component (200) to scan along the track (310). When the motion sensing component (200) passes through the sensing interaction area (130), its non-contact leakage current sensor (210) detects the physical field change generated by the leakage current in the interaction area and generates a detection signal. Step S3: The central monitoring and processing module (400) synchronously acquires the real-time location information of the mobile sensing component (200) and the detection signal, and determines the leakage of the busbar module (100) and the degree of leakage based on the amplitude and location of the detection signal, and outputs an alarm signal when the leakage exceeds a preset threshold.

8. The method for detecting leakage current in a computing server chassis according to claim 7, characterized in that, Step S3 also includes sub-step S301: Upon initial detection of a leak, the central monitoring and processing module (400) changes its motion control strategy to drive the motion sensing component (200) to perform a low-speed, high-frequency fine scan near the sensing interaction area (130) of the merge module (100) where a leak has been identified, in order to obtain more detailed leak characteristic data.

9. The method for detecting leakage current in a computing server chassis according to claim 7, characterized in that, The central monitoring and processing module (400) is also used to control the track drive unit (300) to drive the motion of the motion sensing component (200) according to a preset strategy. The preset strategy includes: constant speed inspection, variable speed or dwell detection in a specific sensing interaction area (130), and periodic reciprocating scanning.

10. The method for detecting leakage current in a computing server chassis according to claim 7, characterized in that, The logic for using the non-contact leakage current sensor (210) to detect the physical field change generated by the leakage current in the interaction region and generate a detection signal is as follows: Initialize the detection parameters of the non-contact leakage current sensor (210), start the track drive unit (300) to control the motion sensing component (200) to scan at a constant speed along the track (310), and synchronously record the real-time position coordinates (X,Y) and moving speed v of the motion sensing component (200); When the mobile sensing component (200) reaches the sensing interaction area (130) of any busbar module (100), the electromagnetic field strength E(t) generated by the leakage current in the sensing interaction area (130) is continuously measured by the sensor probe (211), and the peak-to-peak value ΔE of the electromagnetic wave is extracted; the temperature field gradient ΔT=T−T_env caused by the Joule effect of the leakage current is measured simultaneously, where T is the sensor surface temperature and T_env is the chassis ambient temperature; Dynamic baseline filtering is performed on the peak-to-peak value ΔE of the electromagnetic wave to eliminate background electromagnetic interference and generate the high-frequency electromagnetic field energy value E' excited by the leakage current in the induction interaction zone (130); at the same time, weighted average calculation is performed on ΔT to output the local temperature rise T'=α×ΔT caused by the Joule effect of the leakage current in the induction interaction zone (130), where α is the set temperature influence factor; Based on the moving speed v and the current total scanning time t, the horizontal distance d between the sensor head (211) and the leak point is calculated as d = v × t. After T', E' and d are uniformly normalized, a normalized evaluation index S = K × ((E' × T') / d²) is generated, where K is a predefined calibration coefficient. The comprehensive detection signal value S is compared with the preset signal threshold. If the former is greater than or equal to the latter, the current coordinate (X,Y) is marked as a potential leakage point, and the detection signal set D={S,X,Y} is output to the central monitoring and processing module (400).

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