Cable GIS terminal equipment state detection method, device, equipment and medium

Abstract

The invention discloses a cable GIS terminal equipment state detection method and device, equipment and a medium, and belongs to the technical field of equipment fault detection. The method comprises the following steps: collecting vibration signals generated at a plurality of positions when the cable GIS terminal equipment operates; converting the measured vibration signal from a time domain to a frequency domain by using fast Fourier transform, and obtaining a frequency spectrum of the vibration signal; the frequency spectrum of the vibration signal of the cable GIS terminal equipment in the normal operation state serves as a standard frequency spectrum, and the cosine similarity between the frequency spectrum of the vibration signal and the standard frequency spectrum is calculated; and obtaining the operation state of the cable GIS terminal equipment based on the plurality of cosine similarities. According to the invention, the vibration signal acquisition points on the cable GIS terminal equipment are accurately selected, so that the vibration condition of the cable GIS terminal is comprehensively and three-dimensionally detected without redundancy; and high-efficiency diagnosis of various typical structure defects of the cable GIS terminal equipment is realized by using fast Fourier transform and cosine similarity.

Description

Technical Field

[0001] The present invention belongs to the technical field of equipment fault detection, and relates to a method, device, equipment and medium for detecting the state of a cable GIS terminal device. Background Art

[0002] As the cable rate of urban power grids continues to climb, cables have become the main carrier for urban power transmission. As an important connection node between GIS (Gas Insulated Switchgear), transformers and cables, cable GIS terminals have frequently failed in recent years, seriously affecting the safe operation of the power grid. However, due to their high tightness and complexity, current high-voltage cable GIS terminals face problems such as difficulty in perceiving faults, difficulty in equipment maintenance, and long power outage repair times.

[0003] During operation, the cable GIS terminal is affected by the electromagnetic force of the induced current in its own magnetic field, the magnetic hysteresis contraction force of the outer shell, and the current contraction force of the contact surface of the contact, generating vibrations with a fundamental frequency of 100 Hz. When the equipment has a fault, the vibration signal spectrum changes accordingly and has certain characteristic values. Therefore, it is feasible to determine the operation state of the equipment based on the vibration signal, and the operation is convenient without affecting the operation of the equipment itself. However, there has not been an invention patent proposing a detection method for the vibration characteristics of cable GIS terminals, and existing detection means cannot meet the requirements of on-site operation and maintenance.

[0004] Chinese Patent CN114264945 A discloses a method for detecting the state of equipment, mainly using the vibration signal data of gas-insulated fully enclosed combined power equipment to construct a discrimination system for the operation state of power equipment through a calculation model. However, this method is for the GIS equipment body rather than the cable GIS terminal, and does not specify the position of vibration signal measurement.

[0005] Chinese Patent CN112304592 B discloses a method for detecting the mechanical state of GIS equipment, by obtaining the vibrations generated during the opening or closing action of the circuit breaker of the GIS equipment body to analyze internal mechanical state anomalies. However, this analysis is for the vibration signals generated by the mechanical structure actions inside the GIS and is not applicable to equipment such as cable GIS terminals without mechanical structure actions inside.

[0006] Chinese Patent CN115128444 A discloses a method for detecting the state quantity of disconnectors in GIS, proposing to analyze the state quantity of disconnectors using a pre-trained state quantity evaluation model. However, this method is for the GIS equipment body rather than the cable GIS terminal, and is not a detection method for vibration signals. Summary of the Invention

[0007] The object of the present invention is to overcome the deficiencies in the prior art and provide a method, device, equipment and medium for detecting the state of a cable GIS terminal device, which improves the efficiency of detecting the state of the cable GIS terminal device.

[0008] To achieve the above object, the present invention is implemented by the following technical solutions:

[0009] In the first aspect, the present invention provides a method for detecting the state of a cable GIS terminal device, including:

[0010] Collect vibration signals generated at multiple positions during the operation of the cable GIS terminal device;

[0011] Use the fast Fourier transform to convert the measured vibration signal from the time domain to the frequency domain to obtain the spectrum of the vibration signal;

[0012] Take the spectrum of the vibration signal of the cable GIS terminal device under normal operating conditions as the standard spectrum, and calculate the cosine similarity between the spectrum of the vibration signal and the standard spectrum;

[0013] Based on the multiple cosine similarities, obtain the operating state of the cable GIS terminal device.

[0014] Further, the cable GIS terminal device includes: a GIS cabin, an epoxy resin bushing, a tail pipe, and a cable outlet;

[0015] One end of the epoxy resin bushing is connected to the bottom of the GIS cabin, and the other end is connected to the tail pipe; the other end of the tail pipe is connected to the cable outlet.

[0016] Further, it also includes: vibration sensors are arranged at multiple positions of the cable GIS terminal device, including:

[0017] A first sensor is arranged at the center of the top cover of the GIS cabin, and the installation direction of the first sensor is the vertical direction;

[0018] A second sensor and a third sensor perpendicular to each other are arranged in the middle of the GIS cabin, and the installation directions of the second sensor and the third sensor are perpendicular to the surface of the GIS cabin;

[0019] A fourth sensor is arranged at the bottom of the GIS cabin, and the installation direction of the fourth sensor is the vertical direction;

[0020] A fifth sensor and a sixth sensor perpendicular to each other are arranged on the epoxy resin bushing, and the installation directions of the fifth sensor and the sixth sensor are perpendicular to the surface of the epoxy resin bushing;

[0021] A seventh sensor and an eighth sensor perpendicular to each other are provided in the middle of the tail pipe, and the installation directions of the seventh sensor and the eighth sensor are perpendicular to the surface of the tail pipe;

[0022] A ninth sensor and a tenth sensor perpendicular to each other are provided near the tail pipe where the cable exits, and the installation directions of the ninth sensor and the tenth sensor are perpendicular to the surface of the tail pipe;

[0023] An eleventh sensor and a twelfth sensor perpendicular to each other are provided at a position 1 meter away from the tail pipe on the cable outlet, and the installation directions of the eleventh sensor and the twelfth sensor are perpendicular to the surface of the tail pipe.

[0024] Further, the vibration sensor includes a piezoelectric acceleration sensor.

[0025] Further, the frequency spectrum of the vibration signal includes the amplitude spectrum and the phase spectrum of the vibration signal;

[0026] Obtaining the frequency spectrum of the vibration signal includes:

[0027] ,

[0028] ,

[0029] ,

[0030] Among them, represents the amplitude spectrum of the vibration signal; represents the phase spectrum of the vibration signal; represents the frequency-domain representation of the vibration signal, represents the frequency; represents the time-domain representation of the vibration signal; represents the time; represents the real part of, represents the imaginary part of.

[0031] Further, the cosine similarity between the frequency spectrum of the vibration signal and the standard frequency spectrum is calculated by the formula:

[0032] ,

[0033] Among them, represents the eigenvector of the standard frequency spectrum; represents the eigenvector of the frequency spectrum of the vibration signal, .

[0034] Further, based on multiple cosine similarities, obtaining the operating state of the cable GIS terminal device includes:

[0035] If the cosine similarity of all vibration signal acquisition points on the cable GIS terminal device is greater than 0.7, the cable GIS terminal device is in a normal state;

[0036] If the cosine similarity of any one vibration signal acquisition point on the cable GIS terminal device is less than 0.6, the cable GIS terminal device is in a maintenance state;

[0037] Otherwise, the cable GIS terminal device is in an observation state.

[0038] In a second aspect, the present invention further provides a device for detecting the state of a cable GIS terminal device, the device comprising:

[0039] A vibration signal acquisition module, configured to acquire vibration signals generated at multiple positions during the operation of the cable GIS terminal device;

[0040] A frequency domain conversion module, configured to convert the measured vibration signal from the time domain to the frequency domain by using the fast Fourier transform to obtain the frequency spectrum of the vibration signal;

[0041] A cosine similarity calculation module, configured to use the frequency spectrum of the vibration signal of the cable GIS terminal device in a normal operation state as a standard frequency spectrum, and calculate the cosine similarity between the frequency spectrum of the vibration signal and the standard frequency spectrum;

[0042] An operating state acquisition module, configured to acquire the operating state of the cable GIS terminal device based on the multiple cosine similarities.

[0043] In a third aspect, the present invention further provides a computer device, comprising:

[0044] A memory, configured to store a computer program;

[0045] A processor, configured to execute the computer program to implement the steps of the above-mentioned method for detecting the state of a cable GIS terminal device.

[0046] In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, and the program is executed by a processor to implement the steps of the above-mentioned method for detecting the state of a cable GIS terminal device.

[0047] Compared with the prior art, the beneficial effects achieved by the present invention:

[0048] The cable GIS terminal equipment status detection method provided by the present invention comprehensively and three-dimensionally detects the vibration of the cable GIS terminal without redundancy by accurately selecting the vibration signal acquisition points on the cable GIS terminal equipment and installing vibration sensors at the acquisition points; uses the fast Fourier transform to convert the measured vibration signal from the time domain to the frequency domain, and calculates the cosine similarity between the spectrum of the converted vibration signal and the standard spectrum, thereby determining the cable GIS terminal equipment as three states: overhaul, observation, and normal, realizing the efficient diagnosis of various structural defects of the cable GIS terminal equipment. The detection method proposed by the present invention is easy to operate and does not affect the operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 FIG. is a schematic flow chart of a cable GIS terminal equipment status detection method provided by an embodiment of the present invention;

[0050] Figure 2 FIG. is a schematic diagram of the layout of vibration sensors in an embodiment of the present invention;

[0051] Figure 3 FIG. is a flow block diagram of the cable GIS terminal equipment status detection method in an embodiment of the present invention;

[0052] Figure 4 FIG. is a schematic structural diagram of a cable GIS terminal equipment status detection device provided by an embodiment of the present invention;

[0053] Figure 5 FIG. is an internal structure diagram of a computer device provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0054] The technical solution of the present invention will be described in detail below through the drawings and specific embodiments. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. The embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations on the technical solution of the present application. Without conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.

[0055] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0056] Embodiment 1:

[0057] As Figures 1 to 3As shown in the figure, an embodiment of the present invention provides a method for detecting the state of a cable GIS terminal device. Figure 1 For the flow chart of the method for detecting the state of the cable GIS terminal device, this flow chart only shows the logical order of the method described in this embodiment. On the premise of non - conflict, in other possible embodiments of the present invention, the steps shown or described can be completed in a different Figure 1 order than that shown.

[0058] The method for detecting the state of the cable GIS terminal device provided in this embodiment can be applied to the terminal and can be executed by a device for detecting the state of the cable GIS terminal device. This device can be implemented in software and / or hardware, and can be integrated in the terminal.

[0059] See Figure 1 , the method of the embodiment of the present invention specifically includes the following steps:

[0060] Step 1: Collect vibration signals generated at multiple positions during the operation of the cable GIS terminal device.

[0061] As Figure 2 shown, a general cable GIS terminal device in the power field generally includes: a GIS cabin, an epoxy resin bushing, a tail pipe, and a cable outlet. Among them, one end of the epoxy resin bushing is connected to the bottom of the GIS cabin, the other end is connected to the tail pipe, and the other end of the tail pipe is connected to the cable outlet.

[0062] The vibration signals generated during the operation of the cable GIS terminal can reflect internal structural defects, such as missing springs, loose bolts, and cable offset.

[0063] In the present invention, a total of 12 vibration sensors are set on the GIS cabin, epoxy resin bushing, tail pipe, and cable outlet of the cable GIS terminal device to collect vibration signals generated at different positions during the operation of the cable GIS terminal device.

[0064] As Figure 2 shown, the specific installation positions of the 12 vibration sensors are:

[0065] A first sensor 1 is set at the center of the top cover of the GIS cabin, and the installation direction of the first sensor 1 is the vertical direction;

[0066] Two mutually perpendicular second sensors 2 and third sensors 3 are set in the middle of the GIS cabin, and the installation directions of the second sensors 2 and third sensors 3 are perpendicular to the surface of the GIS cabin;

[0067] A fourth sensor 4 is set at the bottom of the GIS cabin, and the installation direction of the fourth sensor 4 is the vertical direction;

[0068] A fifth sensor 5 and a sixth sensor 6 which are perpendicular to each other are arranged on the epoxy resin bushing, and the installation directions of the fifth sensor 5 and the sixth sensor 6 are perpendicular to the surface of the epoxy resin bushing;

[0069] In the middle of the tail pipe, a seventh sensor 7 and an eighth sensor 8 which are perpendicular to each other are arranged, and the installation directions of the seventh sensor 7 and the eighth sensor 8 are perpendicular to the surface of the tail pipe;

[0070] Near the tail pipe of the cable outlet, a ninth sensor 9 and a tenth sensor 10 which are perpendicular to each other are arranged, and the installation directions of the ninth sensor 9 and the tenth sensor 10 are perpendicular to the surface of the tail pipe;

[0071] At a position 1 meter away from the tail pipe on the cable outlet, an eleventh sensor 11 and a twelfth sensor 12 which are perpendicular to each other are arranged, and the installation directions of the eleventh sensor 11 and the twelfth sensor 12 are perpendicular to the surface of the tail pipe.

[0072] During the operation of the cable GIS terminal, it is affected by the electromagnetic force in its own magnetic field due to the induced current in the shell, the magnetic hysteresis contraction force of the shell, and the current contraction force of the contact surface of the contact, generating vibrations with a fundamental frequency of 100 Hz. However, the cable GIS terminal has many components and a complex structure, so the vibration data at each position vary greatly. To ensure the best vibration detection effect, vibration sensors should cover the key positions of the cable GIS terminal. The selected sensor measurement points in the present invention basically cover each component that can be contacted on the outer surface of the cable GIS terminal device, including the GIS cabin body, the tail pipe, the cable, and the epoxy resin bushing, and two vibration sensors are vertically arranged at the same position as much as possible, such as the second sensor 2 and the third sensor 3, the fifth sensor 5 and the sixth sensor 6, etc. This is mainly used to detect vibrations in different axial directions and can more comprehensively and three-dimensionally test the vibration conditions of the cable GIS terminal. The number of vibration sensors is also verified through experiments. It is found that setting more vibration sensors on this basis not only wastes sensor resources but also leads to data redundancy, while setting fewer vibration sensors will result in incomplete detection data.

[0073] In the embodiment of the present invention, all vibration sensors use piezoelectric acceleration sensors.

[0074] Step 2: Use the fast Fourier transform (FFT) to convert the measured vibration signal from the time domain to the frequency domain to obtain the spectrum of the vibration signal.

[0075] The spectrum of the vibration signal includes the amplitude spectrum and the phase spectrum of the vibration signal.

[0076] Among them, obtaining the spectrum of the vibration signal includes:

[0077] ,

[0078] ,

[0079] ,

[0080] Among them, represents the amplitude spectrum of the vibration signal; represents the phase spectrum of the vibration signal; represents the frequency-domain representation of the vibration signal, represents the frequency; represents the time-domain representation of the vibration signal, that is, the original vibration signal obtained in step 1, represents the time; represents the real part of represents the imaginary part of

[0081] Step 3: Use the spectrum of the vibration signal of the cable GIS terminal device under normal operating conditions as the standard spectrum, and calculate the cosine similarity between the spectrum of the vibration signal and the standard spectrum.

[0082] Among them, the standard spectrum is from a cable GIS terminal device without abnormalities, defects, and operating normally. The cable GIS terminal device for collecting the standard spectrum is required to have the same structure and the same rated voltage level as the cable GIS terminal device for state detection of the present invention, so as to ensure the accuracy of diagnosis.

[0083] The cosine similarity evaluates the similarity by calculating the cosine value of the included angle between two vectors, and its value range is [-1, 1]. The closer the value is to 1, the higher the similarity.

[0084] In vibration signal analysis, the signal needs to be first converted into a frequency-domain feature vector, and then the similarity of its spectrum distribution is compared through cosine similarity. Specifically, the cosine similarity between the spectrum of the vibration signal obtained in step 2 and the standard spectrum is calculated by the formula:

[0085] ,

[0086] Among them, represents the feature vector of the standard spectrum; represents the feature vector of the spectrum of the vibration signal; the feature vector of the spectrum of the vibration signal is the amplitude spectrum of the vibration signal and the phase spectrum set, that is , is the same by the same token.

[0087] For the cable GIS terminal, the main frequency is 100 Hz, and the high-frequency components generally do not exceed 5000 Hz. Therefore, the frequency similarity within 5000 Hz is calculated.

[0088] Step 4: Based on multiple cosine similarities, obtain the operating state of the cable GIS terminal device.

[0089] Specifically, as Figure 3 shown, if the cosine similarities between the spectra of the vibration signals at 12 vibration signal acquisition points (installation positions of vibration sensors) on the cable GIS terminal device and the standard spectrum are all greater than 0.7, then the cable GIS terminal device is in a normal state; if there is one or more acquisition points among the 12 vibration signal acquisition points on the cable GIS terminal device where the cosine similarity between the spectrum of the vibration signal and the standard spectrum is less than 0.6, then the cable GIS terminal device is in a maintenance state, indicating that the device under test needs further maintenance; otherwise, the cable GIS terminal device is in an observation state, indicating that there are abnormalities in the device under test that do not affect long-term operation and do not require further maintenance, but it is necessary to increase the vibration detection frequency and pay attention to the long-term change of the vibration signal similarity.

[0090] Embodiment 2:

[0091] Based on the same inventive concept as Embodiment 1, the present invention embodiment also provides a cable GIS terminal device state detection device for implementing the above cable GIS terminal device state detection method. The implementation solution provided by this device to solve the problem is similar to the implementation solution recorded in the above method. Therefore, the specific limitations in the cable GIS terminal device state detection device embodiment provided below can refer to the limitations on the cable GIS terminal device state detection method in the above text and will not be repeated here.

[0092] As Figure 4 shown, the present invention embodiment provides a cable GIS terminal device state detection device, including:

[0093] A vibration signal acquisition module, configured to acquire vibration signals generated at multiple positions during the operation of the cable GIS terminal device;

[0094] A frequency domain conversion module, configured to convert the measured vibration signal from the time domain to the frequency domain by using the fast Fourier transform to obtain the spectrum of the vibration signal;

[0095] A cosine similarity calculation module, configured to use the spectrum of the vibration signal of the cable GIS terminal device in the normal operation state as the standard spectrum and calculate the cosine similarity between the spectrum of the vibration signal and the standard spectrum;

[0096] An operating state acquisition module, configured to obtain the operating state of the cable GIS terminal device based on multiple cosine similarities.

[0097] Example 3:

[0098] The embodiment of the present invention further provides a computer device, which may be a server, and its internal structure diagram may be as shown in Figure 5 . The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals through a network connection. When the computer program is executed by the processor, it implements the cable GIS terminal device status detection method in the foregoing embodiments.

[0099] Those skilled in the art can understand that Figure 5 the structure shown in is only a block diagram of some structures related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0100] Example 4:

[0101] The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, it implements the steps of the following method:

[0102] Collect vibration signals generated at multiple positions during the operation of the cable GIS terminal device;

[0103] Use the fast Fourier transform to convert the measured vibration signal from the time domain to the frequency domain to obtain the spectrum of the vibration signal;

[0104] Take the spectrum of the vibration signal of the cable GIS terminal device in the normal operation state as the standard spectrum, and calculate the cosine similarity between the spectrum of the vibration signal and the standard spectrum;

[0105] Based on multiple cosine similarities, obtain the operating state of the cable GIS terminal device.

[0106] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0107] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0108] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0109] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0110] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Those of ordinary skill in the art, under the inspiration of the present invention and without departing from the spirit and scope protected by the present invention's claims, can still make many forms, and all of these fall within the protection scope of the present invention.

Claims

1. A cable GIS terminal equipment status detection method, characterized in that: include: Collect vibration signals generated at multiple locations when the cable GIS terminal equipment is running; The measured vibration signal is converted from the time domain to the frequency domain using fast Fourier transform to obtain the spectrum of the vibration signal; The frequency spectrum of the vibration signal of the cable GIS terminal device in normal operation is used as the standard frequency spectrum, and the cosine similarity between the frequency spectrum of the vibration signal and the standard frequency spectrum is calculated; Based on the multiple cosine similarities, the operating status of the cable GIS terminal equipment is obtained.

2. The cable GIS terminal equipment status detection method according to claim 1 is characterized in that: The cable GIS terminal equipment includes: a GIS cabin, an epoxy resin casing, a tail pipe and a cable outlet; One end of the epoxy resin sleeve is connected to the bottom of the GIS cabin, and the other end is connected to the tail pipe; the other end of the tail pipe is connected to the cable outlet.

3. The cable GIS terminal equipment status detection method according to claim 2 is characterized in that: Also includes: Vibration sensors are provided at multiple locations of the cable GIS terminal equipment, including: A first sensor is arranged at the center of the top cover plate of the GIS cabin, and the installation direction of the first sensor is a vertical direction; A second sensor and a third sensor are arranged perpendicular to each other in the middle of the GIS cabin, and the installation direction of the second sensor and the third sensor is perpendicular to the surface of the GIS cabin; A fourth sensor is arranged at the bottom of the GIS cabin, and the fourth sensor is installed in a vertical direction; The epoxy resin sleeve is provided with a fifth sensor and a sixth sensor which are perpendicular to each other, and the installation direction of the fifth sensor and the sixth sensor is perpendicular to the surface of the epoxy resin sleeve; A seventh sensor and an eighth sensor are disposed perpendicular to each other in the middle of the tail pipe, and the seventh sensor and the eighth sensor are installed perpendicular to the surface of the tail pipe; A ninth sensor and a tenth sensor perpendicular to each other are arranged near the tail pipe at the outlet of the cable, and the installation direction of the ninth sensor and the tenth sensor is perpendicular to the surface of the tail pipe; An eleventh sensor and a twelfth sensor perpendicular to each other are arranged on the cable outlet line at a distance of 1 meter from the tail pipe. The installation direction of the eleventh sensor and the twelfth sensor is perpendicular to the surface of the tail pipe.

4. The cable GIS terminal equipment status detection method according to claim 3 is characterized in that: The vibration sensor includes a piezoelectric acceleration sensor.

5. The cable GIS terminal equipment status detection method according to claim 1 is characterized in that: The frequency spectrum of the vibration signal includes an amplitude spectrum and a phase spectrum of the vibration signal; Obtaining the spectrum of the vibration signal includes: ， ， ， in, represents the amplitude spectrum of the vibration signal; Represents the phase spectrum of the vibration signal; represents the frequency domain representation of the vibration signal, Indicates frequency; represents the time domain representation of the vibration signal; Indicates time; express The real part of express The imaginary part of .

6. The cable GIS terminal equipment status detection method according to claim 5 is characterized in that: Cosine similarity between the spectrum of the vibration signal and the standard spectrum The calculation formula is: ， in, The eigenvector representing the standard spectrum; a eigenvector representing the frequency spectrum of the vibration signal, .

7. The cable GIS terminal equipment status detection method according to claim 1 is characterized in that: Based on the multiple cosine similarities, the operating status of the cable GIS terminal device is obtained, including: If the cosine similarity of all vibration signal collection points on the cable GIS terminal device is greater than 0.7, the cable GIS terminal device is in a normal state; If the cosine similarity of any vibration signal collection point on the cable GIS terminal device is less than 0.6, the cable GIS terminal device is in maintenance state; Otherwise, the cable GIS terminal equipment is in observation state.

8. A cable GIS terminal equipment status detection device, characterized in that: include: Vibration signal acquisition module, used to collect vibration signals generated at multiple locations when the cable GIS terminal equipment is running; A frequency domain conversion module is used to convert the measured vibration signal from the time domain to the frequency domain using a fast Fourier transform to obtain the frequency spectrum of the vibration signal; A cosine similarity calculation module is used to use the frequency spectrum of the vibration signal of the cable GIS terminal device in a normal operating state as a standard frequency spectrum, and calculate the cosine similarity between the frequency spectrum of the vibration signal and the standard frequency spectrum; The operating status acquisition module is used to acquire the operating status of the cable GIS terminal device based on the multiple cosine similarities.

9. A computer device, characterized in that: include: Memory for storing computer programs; A processor is used to execute the computer program to implement the steps of the cable GIS terminal equipment status detection method described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the cable GIS terminal equipment status detection method described in any one of claims 1 to 7 are implemented.

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