A GIS / GIL equipment mechanical insulation defect multi-modal fusion sensor and detection system

Abstract

The utility model provides a kind of GIS / GIL equipment mechanical insulation defect multimodal fusion sensor and detection system, including pedestal, the top of pedestal is sequentially provided with second piezoelectric element, first piezoelectric element and mass from low to high, second piezoelectric element and first piezoelectric element between pressure are provided with superhigh frequency receiving antenna, the inside of mass is equipped with backing, still including the shell being set in the outside of pedestal, superhigh frequency receiving antenna passes through shell and extends outward by signal line, shell and pedestal are connected as backing, superhigh frequency receiving antenna, mass, first piezoelectric element and second piezoelectric element provide closed space.The utility model design is ingenious, compact structure, the efficiency of the acquisition of multidimensional data is greatly improved, the accurate analysis of mechanical insulation defect is guaranteed, with good economic benefit.

Description

Technical Field

[0001] This utility model relates to the technical field of live-line testing tools for high-voltage electrical equipment in power plants and substations, and in particular to a multi-modal fusion sensor and detection system for mechanical insulation defects in GIS / GIL equipment. Background Technology

[0002] In existing technologies, mechanical defect detection in traditional GIS / GIL equipment typically uses vibration acceleration sensors, while internal insulation defect detection uses ultrasonic sensors or ultra-high frequency signal sensors.

[0003] The existing technology has the following main shortcomings: Lack of Defect Correlation Analysis: Mechanical and insulation defects in GIS / GIL equipment often mutually trigger and evolve in a correlated manner, and ultrasonic and UHF detection methods have varying sensitivities to different types of insulation defects. Existing methods lack effective fusion analysis of mechanical vibration, ultrasonic, and UHF signals, making it difficult to reveal the intrinsic influence patterns between mechanical and insulation defects.

[0004] Signal spatiotemporal separation limitation: Due to limitations of single-function sensors, existing detection methods typically require separate acquisition of vibration signals and partial discharge signals, making it difficult to obtain them at the same location and time. This results in a spatiotemporal mismatch between the mechanical and insulation status information of the equipment, making correlation analysis difficult. Utility Model Content

[0005] This invention provides a multimodal fusion sensor and detection system for mechanical insulation defects in GIS / GIL equipment, which solves the technical problem of insufficient data collection and poor analysis results for mechanical insulation defects.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a multi-modal fusion sensor for mechanical insulation defects in GIS / GIL equipment, including a base, a second piezoelectric element, a first piezoelectric element and a mass block arranged sequentially from low to high on the top of the base, an ultra-high frequency receiving antenna pressed between the second piezoelectric element and the first piezoelectric element, a backing provided on the inner side of the mass block, and a housing disposed on the outer side of the base, the ultra-high frequency receiving antenna passing through the housing and extending outward through a signal line, the housing and the base being connected to provide a closed space for the backing, the ultra-high frequency receiving antenna, the mass block, the first piezoelectric element and the second piezoelectric element.

[0007] In a preferred embodiment, the inner side of the housing is provided with a cavity, and the outer diameters of the mass block, the first piezoelectric element, and the second piezoelectric element are respectively matched with the inner diameter of the cavity.

[0008] In a preferred embodiment, the top and bottom surfaces of the ultra-high frequency receiving antenna are respectively attached to the bottom of the first piezoelectric element and the top of the second piezoelectric element.

[0009] In a preferred embodiment, the first piezoelectric element and the second piezoelectric element have the same external dimensions, and the ultra-high frequency receiving antenna is located in the middle of the second piezoelectric element.

[0010] In a preferred embodiment, the end of the UHF receiving antenna is located at the edge of the second piezoelectric element, and a through hole is provided inside the cavity, which is positioned directly opposite the UHF receiving antenna. The end of the signal line is connected to the end of the UHF receiving antenna.

[0011] In a preferred embodiment, an adapter is provided on the outer side of the housing, a through hole is provided through the cavity and the adapter, and the signal line passes through the through hole.

[0012] In a preferred embodiment, resin is used to fill the space between the top of the mass block and the inside of the shell.

[0013] In a preferred embodiment, the inner side of the shell is detachably provided with a frame, which is used to provide support for the mass block.

[0014] A detection system includes a defect fusion analysis unit and a multi-modal fusion sensor for mechanical insulation defects in GIS / GIL equipment. The defect fusion analysis unit is used to collect and judge the data acquired by the multi-modal fusion sensor for mechanical insulation defects in GIS / GIL equipment.

[0015] In the preferred embodiment, the multi-modal fusion sensor for mechanical insulation defects in GIS / GIL equipment is connected to a vibration detection unit, an ultrasonic detection unit, and an ultra-high frequency detection unit via a power divider. The vibration detection unit, ultrasonic detection unit, and ultra-high frequency detection unit are electrically connected to the defect fusion analysis unit.

[0016] The beneficial effects of this invention are as follows: Based on the synchronously acquired vibration, ultrasonic, and ultra-high frequency signals, the correlation analysis of mechanical-insulation defects in GIS / GIL equipment can be realized. In addition, ultrasonic and ultra-high frequency signals achieve complementarity in the identification of different insulation defect types. The detection system can simultaneously detect the vibration acceleration signal of mechanical defects and the ultrasonic and ultra-high frequency signals of partial discharge of insulation defects in GIS / GIL equipment. Compared with the fusion detection system based on single-mode sensing, it can reduce the number of sensors and signal lines and has better portability. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall sensor of this utility model; Figure 2 yes Figure 1 A schematic diagram of the installation of an ultra-high frequency receiving antenna; Figure 3 This is a schematic diagram of the detection system of this utility model; Figure 4 yes Figure 1 Internal diagram Figure 1 ; Figure 5 yes Figure 1 Internal diagram Figure 2 ; Figure 6 yes Figure 1 Internal diagram Figure 3 .

[0018] In the figure: 1. Housing; 101. Cavity; 102. Threaded hole; 103. Through hole; 2. Backing; 3. UHF receiving antenna; 4. Mass block; 5. First piezoelectric element; 6. Second piezoelectric element; 7. Base; 8. Signal line; 9. Adapter; 10. Frame; 1001. Round rod; 1002. Conical disk; 1003. Through groove; 1004. Threaded post; 1005. Limiting ring. Detailed Implementation

[0019] like Figure 1-2 A multimodal fusion sensor for mechanical insulation defects in GIS / GIL equipment includes a base 7. A second piezoelectric element 6, a first piezoelectric element 5, and a mass block 4 are sequentially arranged from low to high on the top of the base 7. An ultra-high frequency (UHF) receiving antenna 3 is pressed between the second piezoelectric element 6 and the first piezoelectric element 5. A backing 2 is provided inside the mass block 4. The sensor also includes a housing 1 disposed outside the base 7. The UHF receiving antenna 3 passes through the housing 1 and extends outward via a signal line 8. The housing 1 and the base 7 are connected to provide a closed space for the backing 2, the UHF receiving antenna 3, the mass block 4, the first piezoelectric element 5, and the second piezoelectric element 6.

[0020] Currently available solutions include multimodal fusion sensor technology, such as: 1. A dual-modal fusion sensor combining vibration acceleration and ultrasound can simultaneously detect vibration signals caused by mechanical defects and ultrasonic partial discharge signals excited by insulation defects; 2. The "ultrasonic-ultra-high frequency" dual-modal sensor can simultaneously detect ultrasonic signals and ultra-high frequency signals generated by partial discharge of the equipment.

[0021] However, the limitations of existing fusion / synchronization solutions are obvious: 1. Dual-modal fusion sensor: Existing technologies (such as "ultrasound-ultra-high frequency" dual-modal fusion sensors) can achieve synchronous detection, but due to the huge difference in frequency bands between ultrasound and ultra-high frequency signals, the amount of fused signal data is extremely large, putting great pressure on storage. Although frequency reduction sampling can alleviate the storage problem, it can only obtain the envelope characteristics of the ultra-high frequency signal, losing complete time-domain waveform information and hindering fine feature analysis.

[0022] 2. Discrete Synchronous Detection Devices: While synchronous detection devices based on independent vibration acceleration, ultrasonic, and ultra-high frequency sensors can achieve synchronization, they have significant drawbacks: 1) Poor portability: Requires carrying multiple independent sensor probes and complex signal cables; 2) Spatial position deviation: Different sensors need to be deployed in different locations, making it impossible to achieve true same-location measurement.

[0023] Therefore, existing single-mode detection, dual-mode fusion sensor and discrete multi-sensor synchronous detection systems are all insufficient to meet the requirements for simultaneous, local and synchronous acquisition of mechanical vibration acceleration, ultrasonic and ultra-high frequency partial discharge signals of GIS / GIL equipment.

[0024] Both the substrate 7 and the sensor housing 1 are made of ceramic-based wave-transparent composite material to ensure effective transmission of electromagnetic waves. The ultra-high frequency receiving antenna 3 adopts a ring-shaped interdigital electrode structure to stabilize the receiving antenna signal. The first piezoelectric element 5 and the second piezoelectric element 6 are made of PZT piezoelectric ceramic material and are used to convert the received ultrasonic signals and vibration acceleration signals into electrical signals, which are collected by the ring-shaped interdigital electrode 3. At the same time, the ultra-high frequency electromagnetic wave signals received by the ring-shaped interdigital electrode 3 are also collected here. Finally, the collected ultrasonic and vibration acceleration converted signals and ultra-high frequency signals are superimposed and coupled here to form a multi-mode mixed signal, which is transmitted to the subsequent detection system through the signal line 8. The mass block 4 and the backing 2 are connected to form a backing block structure. This backing block serves as an inertial element for vibration acceleration detection, and its acoustic characteristics are designed to absorb ultrasonic reflected waves and reduce interference.

[0025] This solution ingeniously integrates vibration, ultrasound, and ultra-high frequency technologies, ensuring convenient and accurate data acquisition from multiple detection factors. This guarantees comprehensive defect analysis, improves the efficiency of equipment mechanical defect detection, and yields good economic benefits.

[0026] In a preferred embodiment, the inner side of the housing 1 is provided with a cavity 101, and the outer diameters of the mass block 4, the first piezoelectric element 5, and the second piezoelectric element 6 are respectively matched with the inner diameter of the cavity 101.

[0027] The above settings ensure stable installation of each component inside the housing 1, accurate and complete data acquisition, improved testing efficiency, and guaranteed testing accuracy.

[0028] In a preferred embodiment, the top and bottom surfaces of the ultra-high frequency receiving antenna 3 are respectively attached to the bottom of the first piezoelectric element 5 and the top of the second piezoelectric element 6.

[0029] Traditional solutions simply involve tightly fitting the first piezoelectric element 5 and the second piezoelectric element 6 together to acquire ultrasonic data. This solution, however, adds the reception of ultra-high frequency data, demonstrating ingenious design and stable data.

[0030] In a preferred embodiment, the first piezoelectric element 5 and the second piezoelectric element 6 have the same external dimensions, and the ultra-high frequency receiving antenna 3 is located in the middle of the second piezoelectric element 6.

[0031] Because the UHF receiving antenna 3 is very thin but still has a certain thickness, it is positioned between two piezoelectric materials to ensure its accurate position under external force, while also distributing the load evenly to ensure its structural stability and prevent damage.

[0032] In a preferred embodiment, the end of the UHF receiving antenna 3 is located at the edge of the second piezoelectric element 6, and a through hole 103 is provided inside the cavity 101. The through hole 103 is positioned directly opposite the UHF receiving antenna 3, and the end of the signal line 8 is connected to the end of the UHF receiving antenna 3.

[0033] Since the first piezoelectric element 5 and the second piezoelectric element 6 are closely attached, and the signal line has a certain diameter, the end of the UHF receiving antenna 3 is led out from the edge of the first piezoelectric element 5 and the second piezoelectric element 6. Without compromising the stable operation of the first piezoelectric element 5 and the second piezoelectric element 6 and the accuracy of data acquisition, the UHF receiving antenna 3 transmits data to the outside through the signal line. The overall structure is compact, highly integrated, and has good performance.

[0034] In a preferred embodiment, an adapter 9 is provided on the outer side of the housing 1, and a through hole 103 is provided through the cavity 101 and the adapter 9, with the signal line 8 passing through the through hole 103.

[0035] The adapter 9 facilitates the stable output of the signal line 8, which uses a 50Ω triple-shielded coaxial cable for stable and fast data transmission.

[0036] In a preferred embodiment, resin is used to fill the space between the top of the mass block 4 and the inner side of the shell 1.

[0037] The internal structure is compact and stable under stress by filling with resin.

[0038] In a preferred embodiment, the inner side of the housing 1 is detachably provided with a frame 10, which is used to provide support for the mass block 4.

[0039] like Figures 4-6In this design, the overall structural strength is improved by setting a skeleton 10. A threaded hole 102 is provided in the middle of the inner side of the outer shell 1. The skeleton 10 includes a round rod 1001. A threaded post 1004 on one side of the round rod 1001 is set in the threaded hole 102 and its position is locked by a limiting ring 1005 set on the round rod 1001. A conical disk 1002 set on the other side of the round rod 1001 can limit the resin through a through groove 1003. While providing a certain buffer, it ensures the overall structural strength, thereby ensuring the stability and efficiency of data acquisition.

[0040] like Figure 3 Among them, a detection system includes a defect fusion analysis unit and a multi-modal fusion sensor for mechanical insulation defects of GIS / GIL equipment. The defect fusion analysis unit is used to collect and judge the data acquired by the multi-modal fusion sensor for mechanical insulation defects of GIS / GIL equipment.

[0041] Multidimensional signal data acquired by multimodal fusion sensors for mechanical insulation defects in GIS / GIL equipment, after collection and analysis, provides strong support for the current judgment of mechanical insulation defects, thereby ensuring the safe, stable and efficient operation of the equipment.

[0042] In the preferred embodiment, the multi-modal fusion sensor for mechanical insulation defects in GIS / GIL equipment is connected to a vibration detection unit, an ultrasonic detection unit, and an ultra-high frequency detection unit via a power divider. The vibration detection unit, ultrasonic detection unit, and ultra-high frequency detection unit are electrically connected to the defect fusion analysis unit.

[0043] The power divider uses an ultra-wideband resistive power divider to receive multimodal mixed signals from the fusion sensor and output them to subsequent filtering channels. The filtering channels include a multi-channel analog filter bank: High-pass filter: Used to filter out ultra-high frequency signals (e.g., >300MHz or >500MHz, depending on actual needs) from the split signals. Bandpass filter: Used to filter out ultrasonic signals from the split signals (e.g., 20kHz-100kHz range, determined according to actual needs); Low-pass filter: Used to filter out low-frequency vibration signals (e.g., <4kHz, determined according to actual needs) from the split signal. After filtering, the signals are respectively connected to independent ultra-high frequency signal channels, ultrasonic signal channels, and low frequency vibration signal channels; Signal acquisition unit: Contains analog-to-digital converters (ADCs) corresponding to the ultra-high frequency channel, ultrasonic channel, and vibration channel, respectively. This unit is responsible for converting the filtered analog signals of each channel into digital signals in real time.

[0044] Signal detection unit: Based on specific signal processing algorithms (such as time domain analysis, frequency domain analysis, wavelet analysis, etc.), it processes the acquired digital signals to achieve the separation and clustering of multi-source signals, thereby effectively distinguishing the signal characteristics of different physical sources (i.e., different modes).

[0045] Function selection module: Provides a user interface, allowing operators to flexibly select the working mode according to the actual testing task requirements. i) Single-mode detection and analysis mode: analyze vibration, ultrasonic or ultra-high frequency signals separately.

[0046] ii) Multimodal fusion detection and analysis mode: Joint analysis of two or three modal signals.

[0047] Fusion Analysis Unit: When the multimodal fusion mode is selected, this unit, based on the principle of multi-sensor information fusion (such as data-level fusion, feature-level fusion, or decision-level fusion), fuses and analyzes the feature information or decision results of different modal signals separated by the detection unit to improve the accuracy, reliability, and fault identification capability of the detection.

[0048] Results display unit: Provides a graphical user interface (GUI) for real-time display of raw or processed results of detected vibration acceleration, ultrasound, and UHF signals, including waveforms, spectra, and characteristic parameters, as well as results of fusion analysis (such as fault type, location, severity, etc.).

[0049] Historical data query unit: Equipped with storage media (such as a database), it is used to store, index and query historical data of the detection signal (raw data, processing results, analysis reports, etc.), which facilitates subsequent tracing, comparative analysis and report generation.

[0050] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A GIS / GIL device mechanical insulation defect multi-modal fusion sensor, characterized in that: The base (7) includes a second piezoelectric element (6), a first piezoelectric element (5) and a mass block (4) arranged sequentially from low to high on the top of the base (7). A UHF receiving antenna (3) is pressed between the second piezoelectric element (6) and the first piezoelectric element (5). A backing (2) is provided on the inner side of the mass block (4). The base (7) also includes a housing (1) arranged on the outside of the base (7). The UHF receiving antenna (3) passes through the housing (1) through a signal line (8) and extends outward. The housing (1) and the base (7) are connected to provide a closed space for the backing (2), the UHF receiving antenna (3), the mass block (4), the first piezoelectric element (5) and the second piezoelectric element (6).

2. The GIS / GIL device mechanical insulation defect multi-modal fusion sensor of claim 1, wherein: The inner side of the housing (1) is provided with a cavity (101), and the outer diameters of the mass block (4), the first piezoelectric element (5) and the second piezoelectric element (6) are respectively matched with the inner diameter of the cavity (101).

3. The GIS / GIL device mechanical insulation defect multi-modal fusion sensor of claim 1, wherein: The top and bottom surfaces of the ultra-high frequency receiving antenna (3) are respectively attached to the bottom of the first piezoelectric element (5) and the top of the second piezoelectric element (6).

4. The GIS / GIL apparatus mechanical insulation defect multi-modal fusion sensor of claim 1, wherein: The first piezoelectric element (5) and the second piezoelectric element (6) have the same external dimensions, and the ultra-high frequency receiving antenna (3) is located in the middle of the second piezoelectric element (6).

5. The GIS / GIL apparatus mechanical insulation defect multi-modal fusion sensor of claim 2, wherein: The end of the ultra-high frequency receiving antenna (3) is located at the edge of the second piezoelectric element (6). A through hole (103) is provided inside the cavity (101). The through hole (103) is set directly opposite the ultra-high frequency receiving antenna (3). The end of the signal line (8) is connected to the end of the ultra-high frequency receiving antenna (3).

6. The GIS / GIL apparatus mechanical insulation defect multi-modal fusion sensor of claim 5, characterized by: An adapter (9) is provided on the outside of the housing (1). A through hole (103) is provided in the cavity (101) and the adapter (9). The signal line (8) is provided in the through hole (103).

7. The GIS / GIL device mechanical insulation defect multi-modal fusion sensor of claim 1, wherein: Resin is filled between the top of the mass block (4) and the inside of the shell (1).

8. The GIS / GIL apparatus mechanical insulation defect multi-modal fusion sensor of claim 7, characterized by: The inner side of the shell (1) is also provided with a detachable frame (10) for supporting the mass block (4).

9. A detection system characterized by: The detection system includes a defect fusion analysis unit and a multi-modal fusion sensor for mechanical insulation defects of GIS / GIL equipment as described in any one of claims 1 to 8. The defect fusion analysis unit is used to collect and judge the data acquired by the multi-modal fusion sensor for mechanical insulation defects of GIS / GIL equipment.

10. The detection system of claim 9, wherein: The multi-modal fusion sensor for mechanical insulation defects in GIS / GIL equipment is connected to a vibration detection unit, an ultrasonic detection unit, and an ultra-high frequency detection unit via a power divider. The vibration detection unit, ultrasonic detection unit, and ultra-high frequency detection unit are electrically connected to the defect fusion analysis unit.

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