Electrical equipment partial discharge ultrahigh frequency signal intelligent detection device

Abstract

The invention discloses an electrical equipment partial discharge ultrahigh frequency signal intelligent detection device, and relates to the technical field of electrical equipment insulation state monitoring, the electrical equipment partial discharge ultrahigh frequency signal intelligent detection device comprises a flat plate, one side of the flat plate is provided with a sealing suction cup, the sealing suction cup is internally provided with a damping base, the damping base is internally provided with a three-axis displacement mechanism, and the three-axis displacement mechanism is provided with a three-axis displacement sensor. A sensor array is arranged on one side of the three-axis displacement mechanism, a control layer is arranged on one side of the sensor array, horizontal detection sensors are arranged on the two sides of the damping base correspondingly, air suction holes are formed in the two sides of the horizontal detection sensors correspondingly, and telescopic supporting legs are arranged on one sides of the air suction holes. The number of the telescopic supporting legs is three, the three telescopic supporting legs are evenly distributed with the damping base as the circle center at the included angle of 120 degrees, the sealing suction cups are matched with the four sets of circumferentially-distributed air suction holes and air suction pumps, vacuum can be rapidly pumped to form negative pressure adsorption, the flat plate is tightly attached to the surface of tested equipment, and the fixing stability of the device is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of insulation condition monitoring of electrical equipment, and more specifically, the present invention relates to an intelligent detection device for ultra-high frequency signals of partial discharge of electrical equipment. Background Art

[0002] In the field of power equipment condition monitoring, partial discharge is an important indicator for evaluating the deterioration of the insulation system, and is particularly crucial for the fault warning of key equipment such as GIS (Gas Insulated Switchgear), transformers, and high-voltage cables. With the development of ultra-high frequency (UHF) detection technology, its non-invasive and highly sensitive characteristics can achieve real-time monitoring of equipment under live conditions. However, existing devices face significant challenges in complex working conditions: for example, the strong electromagnetic environment in substations causes signal distortion, the sensors are not fixed stably on uneven equipment surfaces or in high-altitude operation scenarios, and detection errors are caused by low efficiency of manual leveling. In addition, existing adsorption structures are easily detached due to vibration and temperature changes, making it difficult to ensure the continuity of signal acquisition. Therefore, there is an urgent need for an intelligent detection device with high-stability adsorption, adaptive leveling, and anti-interference capabilities to meet the engineering requirements of rapid deployment and accurate monitoring on the surface of power equipment;

[0003] Existing devices mostly rely on mechanical clamping or simple adsorption structures, and are prone to displacement or even detachment due to vibration or poor contact on complex surfaces (such as curved surfaces and rough surfaces) or in high-altitude operations. At the same time, existing technologies mostly use single-axis adjustment or manual positioning, making it difficult to achieve precise alignment of the discharge point in three-dimensional space.

[0004] Therefore, an intelligent detection device for ultra-high frequency signals of partial discharge of electrical equipment is proposed to solve the above problems. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an intelligent detection device for ultra-high frequency signals of partial discharge of electrical equipment to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: An intelligent detection device for ultra-high frequency signals of partial discharge of electrical equipment, including a flat plate, a sealed suction cup is arranged on one side of the flat plate, a shock-absorbing base is arranged inside the sealed suction cup, a three-axis displacement mechanism is arranged inside the shock-absorbing base, a sensor array is arranged on one side of the three-axis displacement mechanism, a control layer is arranged on one side of the sensor array, horizontal detection sensors are arranged on both sides of the shock-absorbing base, air extraction holes are arranged on both sides of the horizontal detection sensors, there are four groups of the air extraction holes, and the four groups of air extraction holes are evenly distributed along the circumferential direction of the shock-absorbing base. A telescopic leg is arranged on one side of the air extraction hole, there are three groups of the telescopic legs, and the three groups of telescopic legs are evenly arranged at an angle of 120° with the shock-absorbing base as the center.

[0007] Preferably, an electromagnetic shielding housing is provided on one side of the control layer. Air extraction pumps are provided on both sides of the electromagnetic shielding housing. One side of each air extraction pump is connected to two groups of air extraction holes. A control panel is provided on the outer wall of the electromagnetic shielding housing, and grips are provided on both sides of the control panel.

[0008] Preferably, the three-axis displacement mechanism includes an X-axis lead screw, sliding blocks, a Y-axis lead screw, a Z-axis lead screw, and a fixed bracket. Sliding blocks are provided at both ends of the X-axis lead screw. The X-axis lead screw is connected to the Y-axis lead screw through the sliding blocks. The Y-axis lead screw is connected to the Z-axis lead screw through the sliding blocks provided at both ends, and the Z-axis lead screw is fixedly connected to the inner wall of the shock-absorbing base. A fixed bracket is provided on the outer wall of the X-axis lead screw.

[0009] Preferably, a support plate is provided at the center of the fixed bracket. Threaded holes are provided on the outer wall of the fixed bracket. The sensor array is screwed to the fixed bracket through the threaded holes. A stabilizing layer is provided on the top of the support plate, and the support plate is in contact with the bottom of the sensor array through the stabilizing layer.

[0010] Preferably, the control layer includes a processing unit, a UHF signal acquisition card, and a power supply. The UHF signal acquisition card is provided on one side of the processing unit, and the power supply is provided on one side of the UHF signal acquisition card. The power supply is fixed inside the electromagnetic shielding housing by bolts.

[0011] Preferably, the telescopic legs include telescopic motors and anti-slip legs. The anti-slip legs are provided on one side of the telescopic motors. The horizontal detection sensors transmit detection data to the processing unit, enabling the processing unit to control the displacement of the three telescopic motors, thereby keeping the sensor array level with the device to be detected.

[0012] Preferably, an indicator light is provided on one side of the outer wall of the control panel. A connection interface is provided on one side of the indicator light, and a charging port is provided on one side of the connection interface.

[0013] Preferably, the sealing suction cup is aligned with the device to be measured and placed through the grip. The air extraction pump extracts the air from the contact surface between the sealing suction cup and the device to be measured through the air extraction holes, fixing the flat plate on the surface of the device to be measured.

[0014] The technical effects and advantages of the present invention:

[0015] 1. Compared with the prior art, this intelligent detection device for partial discharge ultra-high frequency signals of an electrical equipment can quickly evacuate to form negative pressure adsorption through a sealed suction cup in cooperation with four groups of circumferentially distributed air extraction holes and an air extraction pump, so that the flat plate is closely attached to the surface of the device to be measured, significantly improving the fixing stability of the device. It is especially suitable for complex surfaces or high-altitude operation scenarios. At the same time, an electromagnetic shielding shell is used to wrap the control layer, effectively isolating the interference of external electromagnetic noise on the ultra-high frequency signal acquisition card. Combined with the multi-point synchronous detection of the sensor array, the sensitivity and signal-to-noise ratio of partial discharge signals are greatly improved.

[0016] 2. Compared with the prior art, this intelligent detection device for partial discharge ultra-high frequency signals of an electrical equipment realizes the micron-level displacement adjustment of the sensor array in three-dimensional space through the X / Y / Z-axis lead screw linkage design of the three-axis displacement mechanism in combination with the sliding block and the fixed bracket, ensuring the precise alignment of the detection position with the discharge point to be measured. At the same time, based on the real-time feedback data of the horizontal detection sensor, the processing unit automatically controls the height adjustment of three groups of telescopic legs distributed at 120°, so that the sensor array always remains horizontal with the surface to be measured, eliminating the detection error caused by the tilt of the equipment.

[0017] 3. Compared with the prior art, this intelligent detection device for partial discharge ultra-high frequency signals of an electrical equipment has a multi-layer buffer structure with a support plate and a stable layer embedded in the shock-absorbing base, and is combined with the rigid connection design of the threaded holes. While suppressing the interference of mechanical vibration, it ensures the physical stability of the installation of the sensor array. At the same time, the integrated design of the control screen, indicator light and handle supports real-time data display and operation instruction input. Combined with the connection interface and charging port, it realizes the rapid export of detection data and the improvement of the device's battery life, significantly improving the on-site detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional view of the whole structure of the present invention.

[0019] Figure 2 It is a schematic three-dimensional view of the whole structure of the present invention.

[0020] Figure 3 It is a schematic cross-sectional view of the side of the present invention.

[0021] Figure 4 It is a schematic partial three-dimensional view of the three-axis displacement mechanism of the present invention.

[0022] Figure 5 It is a schematic three-dimensional view of the sensor array and the fixed bracket of the present invention.

[0023] The reference numerals are: 1, flat plate; 2, sealed suction cup; 3, shock-absorbing base; 4, three-axis displacement mechanism; 401, X-axis lead screw; 402, sliding block; 403, Y-axis lead screw; 404, Z-axis lead screw; 405, fixed bracket; 5, sensor array; 6, control layer; 601, processing unit; 602, ultra-high frequency signal acquisition card; 603, power supply; 7, horizontal detection sensor; 8, air extraction hole; 9, telescopic leg; 901, telescopic motor; 902, anti-slip leg; 10, electromagnetic shielding housing; 11, air extraction pump; 12, control panel; 13, grip; 14, support plate; 15, threaded hole; 16, stable layer; 17, indicator light; 18, connection interface; 19, charging port. Detailed implementation manners

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Embodiment 1

[0026] As shown in the attached Figures 1 to 5 An intelligent detection device for ultra-high frequency signals of partial discharge of an electrical equipment, including a flat plate 1. A sealed suction cup 2 is arranged on one side of the flat plate 1. A shock-absorbing base 3 is arranged inside the sealed suction cup 2. A three-axis displacement mechanism 4 is arranged inside the shock-absorbing base 3. A sensor array 5 is arranged on one side of the three-axis displacement mechanism 4. A control layer 6 is arranged on one side of the sensor array 5. Horizontal detection sensors 7 are arranged on both sides of the shock-absorbing base 3. Air extraction holes 8 are arranged on both sides of the horizontal detection sensors 7. There are four groups of air extraction holes 8, and the four groups of air extraction holes 8 are evenly arranged along the circumferential direction of the shock-absorbing base 3. A telescopic leg 9 is arranged on one side of the air extraction hole 8. There are three groups of telescopic legs 9, and the three groups of telescopic legs 9 are evenly arranged at an angle of 120° with the shock-absorbing base 3 as the center.

[0027] Specifically, the device takes the flat plate 1 as the installation reference, and integrates a sealed suction cup 2 on one side as an adaptive fixing mechanism. It is connected to an external air pump 11 through four groups of air extraction holes 8 evenly distributed in a circle to form a vacuum adsorption system for rapid fixation. The three-layer shock-absorbing base 3 nested inside the sealed suction cup 2 is constructed of elastic materials and forms a double shock-absorbing structure with three telescopic legs 9 distributed at an angle of 120°. The anti-slip legs 902 built into the telescopic legs 9 are driven by the tilt data fed back by the horizontal detection sensor 7, and the telescopic motor 901 is driven by the processing unit 601 for three-dimensional leveling to ensure stable fitting of the device on complex surfaces. The three-axis displacement mechanism 4 integrated inside the shock-absorbing base 3 adopts an X-Y-Z orthogonal lead screw drive system. Through the linkage control of the sliding block 402, the sensor array 5 carried by the fixed bracket 405 can be calibrated in three-dimensional position within an accuracy range of ±5 mm. Combined with the rigid-elastic composite structure of the support plate 14 and the stable layer 16, it not only ensures the positioning accuracy of ultra-high frequency signal acquisition but also effectively suppresses mechanical vibration interference. Integrating vacuum adsorption, intelligent leveling, and precision displacement mechanisms into a single detection device, through the coordinated operation of the sealed suction cup 2 and the three-axis displacement mechanism 4, the sensor array 5 can not only quickly adhere to the surfaces of devices with different curvatures but also be accurately adjusted to the optimal detection position. Compared with traditional fixed detection devices, the detection efficiency is improved and the anti-interference ability is significantly enhanced.

[0028] Embodiment 2

[0029] Based on Embodiment 1, the solution in Embodiment 1 is further refined and introduced in combination with the following specific working methods, as Figures 1 to 5 shown, details are described below:

[0030] As a preferred implementation method, an electromagnetic shielding housing 10 is provided on one side of the control layer 6. Air pumps 11 are provided on both sides of the electromagnetic shielding housing 10. One side of the air pump 11 is connected to two groups of air extraction holes 8. A control screen 12 is provided on the outer wall of the electromagnetic shielding housing 10. Grips 13 are provided on both sides of the control screen 12.

[0031] Specifically, the outer side of the control layer 6 is an electromagnetic shielding housing 10 cast from 6063 aluminum alloy, with an electromagnetic shielding effectiveness of 80 dB in the 1 GHz frequency band. The ultra-high frequency signal acquisition card 602 and the processing unit 601 are enclosed by a fully enclosed cavity structure, effectively blocking external electromagnetic interference from interfering with the microvolt-level discharge signal. Two Hargraves HG-20 type micro vacuum pumps 11 are symmetrically installed on both sides of the housing. Each vacuum pump 11 is connected to two groups of air extraction holes 8 through independent silicone pipes, forming a dual-redundant air path system. When the operator starts the adsorption program through the control screen 12 composed of a TPK capacitive touch screen, the two pumps work together to reduce the internal air pressure of the sealed suction cup 2 to -85 kPa within 3 seconds, and cooperate with the telescopic legs 9 evenly distributed at 120° to form a three-point mechanical support, realizing the stable adsorption of the device on curved or inclined surfaces such as GIS pot-type insulators. The embedded installation groove reserved at the top of the shielding housing 10 is precisely matched with the heat dissipation fins of the processing unit 601, ensuring both heat dissipation efficiency and shielding continuity; the control screen 12 adopts projective capacitive touch technology, with a 0.5 mm thick tempered glass covering the surface. Its display layer is connected to the HDMI 2.0 interface of the processing unit 601 through an FFC flexible cable, and can display the PRPD spectrum and the signal intensity histogram in real time.

[0032] As a preferred embodiment, the three-axis displacement mechanism 4 includes an X-axis lead screw 401, a sliding block 402, a Y-axis lead screw 403, a Z-axis lead screw 404, and a fixed bracket 405. Sliding blocks 402 are provided at both ends of the X-axis lead screw 401. The X-axis lead screw 401 is connected to the Y-axis lead screw 403 through the sliding block 402. The Y-axis lead screw 403 is connected to the Z-axis lead screw 404 through the sliding blocks 402 provided at both ends, and the Z-axis lead screw 404 is fixedly connected to the inner wall of the shock-absorbing base 3. A fixed bracket 405 is provided on the outer wall of the X-axis lead screw 401.

[0033] Specifically, the precise positioning of the sensor array 5 in three-dimensional space is achieved through the three-dimensional combined design of the X-axis lead screw 401, Y-axis lead screw 403, and Z-axis lead screw 404. The X-axis lead screw forms an orthogonal connection with the Y-axis lead screw through the sliding blocks 402 at both ends. The Y-axis lead screw is then linked with the Z-axis lead screw in the vertical direction through the sliding block. The end of the Z-axis lead screw is rigidly connected to the shock-absorbing base 3 through the fixed bracket 405. This stepped transmission structure drives the lead screws to rotate synchronously through motors of the Omron RK series or SMC LEYG series, enabling the sliding block 402 to drive the sensor array 5 to achieve a displacement accuracy of ±50 mm in the X / Y plane, and the height in the Z-axis direction can be adjusted from 0 to 30 mm. The integration design of the three-axis lead screws and the shock-absorbing base 3, through the triangular stable structure of the fixed bracket 405, not only ensures the multi-dimensional dynamic adjustment ability of the sensor array 5 during the detection process but also effectively isolates the vibration interference of the equipment using the damping material of the shock-absorbing base 3. During specific implementation, the sensor array 5 is detachably connected to the fixed bracket 405 through the threaded holes 15, and together with the aluminum alloy base of the support plate 14 and the conductive rubber pad of the stable layer 16, it forms a double protection of electromagnetic shielding and mechanical buffering.

[0034] As a preferred embodiment, a support plate 14 is provided at the center of the fixed bracket 405. Threaded holes 15 are provided on the outer wall of the fixed bracket 405. The sensor array 5 is screwed to the fixed bracket 405 through the threaded holes 15. A stable layer 16 is provided on the top of the support plate 14, and the support plate 14 is attached to the bottom of the sensor array 5 through the stable layer 16.

[0035] Specifically, the support plate 14 is made of lightweight aluminum alloy. The stable layer 16 made of silicone damping material is fixed on its top through a hot pressing process. The two jointly support the bottom of the sensor array 5 in a physically attached manner. The 4 groups of symmetric threaded holes 15 provided on the outer wall of the fixed bracket 405 adopt the M4 standard thread specification, and are rigidly connected to the positioning holes at the bottom of the sensor array 5 through adjustable screws to form a four-point mechanical fixation;

[0036] Multi-dimensional stability is achieved through a composite structure of "rigid connection + flexible buffer": The support plate 14 provides basic load-bearing capacity. The silicone material of the stabilizing layer 16 can not only absorb the micro-vibrations generated by the movement of the three-axis displacement mechanism 4, but also compensate for the unevenness tolerance of the installation surface. The threaded holes 15 adopt a replaceable copper threaded sleeve design, which allows an angular adjustment of ±2° while ensuring the connection strength. Combined with the high-sensitivity characteristics of the UHF sensors of common models integrated in the sensor array 5, such as the PD-Sensor 8000 series or the OM I CRON SE-900, it can ensure that the sensor probe and the measured surface always maintain the best coupling distance during the detection process. Compared with the traditional adhesive fixing method, this structure improves the positioning accuracy of the sensor array to the 0.1 mm level and supports rapid disassembly and maintenance, solving the technical problem that sensors are easily damaged by mechanical impacts under complex working conditions.

[0037] As a preferred implementation, the control layer 6 includes a processing unit 601, a UHF signal acquisition card 602, and a power supply 603. The UHF signal acquisition card 602 is arranged on one side of the processing unit 601, and the power supply 603 is arranged on one side of the UHF signal acquisition card 602. The power supply 603 is fixed inside the electromagnetic shielding housing 10 by bolts.

[0038] Specifically, the processing unit 601 uses a combination of an ARM Cortex-M7 processor and an Xilinx Zynq-7000 FPGA chip, and is directly connected to the UHF signal acquisition card 602 of the NIPXIe-5162 type through a PCIe bus to achieve synchronous acquisition and digital processing of UHF signals from 1 MHz to 3 GHz. The power supply 603 forms a double fixation with the galvanized steel plate layer of the electromagnetic shielding housing 10 through an M8 bolt group;

[0039] The layered electromagnetic isolation technology is adopted: The inner layer is composed of permalloy to form a magnetic shielding layer, the middle layer is filled with conductive silicone to achieve gap sealing, and the outer layer is provided with a 0.5 mm thick copper foil layer to form a Faraday cage. It can be measured that the external electromagnetic interference can be reduced to below -90 dBm. In particular, the bolt fixation design of the power supply 603 in cooperation with the polyurethane buffer layer of the shock-absorbing base 3 enables the equipment to maintain stable contact impedance in a vibration environment of 10 - 2000 Hz. Compared with the traditional welded power supply scheme, this design improves the maintenance and replacement efficiency. The spatial layout of the three follows the principle of the shortest signal flow. The input end of the UHF signal acquisition card 602 is less than 15 cm away from the interface of the sensor array 5 and is directly connected through an SMA-KHD coaxial connector to ensure that partial discharge pulses with a rising edge of ≥300 ps can be captured during the GIS pothead insulator detection.

[0040] As a preferred embodiment, the telescopic support leg 9 includes a telescopic motor 901 and an anti-slip support leg 902. The anti-slip support leg 902 is arranged on one side of the telescopic motor 901. The horizontal detection sensor 7 transmits the detection data to the processing unit 601, so that the processing unit 601 controls the displacement of the three groups of telescopic motors 901, thereby keeping the sensor array 5 horizontal with the device to be detected.

[0041] Specifically, the horizontal detection sensor 7, which is a six-axis attitude sensor of model MPU6050, monitors the tilt angle of the shock-absorbing base 3 in real time, transmits the three-dimensional space attitude data to the processing unit 601 through the I2C bus. The processing unit 601 calculates the displacement compensation amount of the three groups of telescopic motors 901 through the PID algorithm, and drives the anti-slip support legs 902 symmetrically distributed at 120° to perform differential telescopic adjustment;

[0042] In this design, the anti-slip support leg 902 adopts a threaded rod structure coated with polyurethane, and realizes a precise displacement of 0.1 mm through a harmonic reducer under the drive of the telescopic motor 901, combining the three-point support principle with real-time closed-loop feedback.

[0043] As a preferred embodiment, an indicator light 17 is arranged on one side of the outer wall of the control screen 12. A connection interface 18 is arranged on one side of the indicator light 17, and a charging port 19 is arranged on one side of the connection interface 18.

[0044] Specifically, the indicator light 17 is directly connected to the processing unit 601 of the control layer 6 through a circuit. The indicator light 17 of the OSRAM LW Q9WP series is used to realize hierarchical status indication: the green light is always on, indicating that the device is running normally; the yellow light flashes, indicating signal acquisition fluctuations; the red alarm corresponds to sensor abnormalities or electromagnetic interference exceeding the limit;

[0045] The connection interface 18 is a waterproof USB-C and RJ45 composite port, which communicates bidirectionally with the ultra-high frequency signal acquisition card 602 and the processing unit 601 through an internal wiring harness. It not only supports real-time data transmission to an external analysis device, but also can access a calibration signal source for on-line calibration; the charging port 19 is a Type-C interface adopting the PD fast charging protocol, which is directly connected to the charge and discharge management module of the power supply 603, and cooperates with the IP67 sealing ring and the flip-type dust-proof structure to ensure the safety of the interface in the outdoor complex environment; through spatial topology optimization, the interaction unit is centrally arranged in the one-handed touchable area, and the connection action can be completed without the need to shift the line of sight during operation; the state-function partition logic is adopted. The left indicator light realizes a clear view of the device health status through color coding, the middle interface group meets the multi-scenario expansion requirements, and the right charging port conforms to the ergonomic holding direction.

[0046] As a preferred embodiment, the sealing suction cup 2 is aligned with the device under test through the grip 13, and the air pump 11 extracts the air on the contact surface between the sealing suction cup 2 and the device under test through the air extraction holes 8, so that the flat plate 1 is fixed on the surface of the device under test.

[0047] Specifically, the air extraction holes 8 are designed in an annular array and cooperate with the rubber buffer layer of the shock absorption base 3, which not only ensures the full circumferential sealing between the device and the surface to be measured, but also realizes the micron-level positioning compensation of the sensor array 5 through the three-axis displacement mechanism 4 inside the shock absorption base 3;

[0048] Innovatively, the vacuum adsorption mechanism is linked with the horizontal calibration system. When the horizontal detection sensor 7 detects an inclination of more than ±0.5°, the processing unit 601 will synchronously drive the three sets of telescopic legs 9 distributed at 120°. Combining the real-time feedback signal of the UHF probe built in the sensor array 5, a closed-loop adjustment system is formed to ensure that the sensor array 5 always maintains a parallelism of 0.1 mm with the surface to be measured; this multi-sensor fusion design realizes a millisecond-level response through the control layer 6. Compared with the traditional bolt fixing method, it not only eliminates the signal attenuation caused by mechanical installation, but also shortens the single detection time, and is especially suitable for the full-automatic scanning detection of curved surface devices such as GIS bushings.

[0049] The working process of the present invention is as follows: First, a vacuum adsorption is formed between the sealing suction cup 2 and the surface of the device under test, and negative pressure fixation is formed by synchronously pumping air through the four sets of circumferentially evenly distributed air extraction holes 8 by the air pump 11. This dual fixation mechanism of flat plate + suction cup significantly enhances the stability of the device; under the closed-loop control of the horizontal detection sensor 7, the telescopic legs 9 receive the displacement data of the three sets of telescopic legs 902 distributed at 120° in real time through the processing unit 601, and drive the telescopic motor 901 to perform three-dimensional attitude adjustment to ensure that the sensor array 5 always remains parallel to the surface to be measured; the three-axis displacement mechanism 4 enables the sensor array 5 on the fixed bracket 405 to perform millimeter-level precision spatial positioning along the threaded holes 15 through the X / Y / Z axis screw linkage mechanism, and cooperates with the shock absorption structure composed of the stable layer 16 and the support plate 14 to effectively eliminate the interference of mechanical vibration on high-frequency signal acquisition; during detection, the ultra-high frequency signal is digitally processed by the signal acquisition card 602 and then subjected to feature analysis by the processing unit 601 embedded in the electromagnetic shielding housing 10, and finally multi-modal data output is realized through the indicator light 17 and the connection interface 18. The above is the working principle of the intelligent detection device for partial discharge ultra-high frequency signals of an electrical equipment.

Claims

1. An intelligent detection device for ultra-high frequency signals of partial discharge of electrical equipment, comprising a flat plate (1), characterized in that: A sealing suction cup (2) is arranged on one side of the plate (1), a shock absorbing base (3) is arranged inside the sealing suction cup (2), a three-axis displacement mechanism (4) is arranged inside the shock absorbing base (3), a sensor array (5) is arranged on one side of the three-axis displacement mechanism (4), a control layer (6) is arranged on one side of the sensor array (5), level detection sensors (7) are arranged on both sides of the shock absorbing base (3), air extraction holes (8) are arranged on both sides of the level detection sensor (7), four groups of air extraction holes (8) are arranged, and the four groups of air extraction holes (8) are evenly arranged along the circumferential direction of the shock absorbing base (3), and telescopic legs (9) are arranged on one side of the air extraction holes (8), three groups of telescopic legs (9) are arranged, and the three groups of telescopic legs (9) are evenly distributed at an angle of 120° with the shock absorbing base (3) as the center.

2. The intelligent detection device for ultra-high frequency signals of partial discharge of electrical equipment according to claim 1, characterized in that: An electromagnetic shielding shell (10) is provided on one side of the control layer (6), and an air pump (11) is provided on both sides of the electromagnetic shielding shell (10). One side of the air pump (11) is connected to the two groups of air extraction holes (8). A control screen (12) is provided on the outer wall of the electromagnetic shielding shell (10), and handles (13) are provided on both sides of the control screen (12).

3. The intelligent detection device for ultra-high frequency signals of partial discharge of electrical equipment according to claim 1, characterized in that: The three-axis displacement mechanism (4) comprises an X-axis screw rod (401), a sliding block (402), a Y-axis screw rod (403), a Z-axis screw rod (404) and a fixed bracket (405), wherein the sliding blocks (402) are arranged at both ends of the X-axis screw rod (401), the X-axis screw rod (401) is connected to the Y-axis screw rod (403) via the sliding blocks (402), the Y-axis screw rod (403) is connected to the Z-axis screw rod (404) via the sliding blocks (402) arranged at both ends, and the Z-axis screw rod (404) is fixedly connected to the inner wall of the shock absorbing base (3), and the fixed bracket (405) is arranged on the outer wall of the X-axis screw rod (401).

4. The intelligent detection device for ultra-high frequency signals of partial discharge of electrical equipment according to claim 3 is characterized in that: A support plate (14) is arranged at the center of the fixing bracket (405), a threaded hole (15) is arranged on the outer wall of the fixing bracket (405), the sensor array (5) is screwed to the fixing bracket (405) via the threaded hole (15), a stabilizing layer (16) is arranged on the top of the support plate (14), and the support plate (14) is fitted with the bottom of the sensor array (5) via the stabilizing layer (16).

5. The intelligent detection device for ultra-high frequency signals of partial discharge of electrical equipment according to claim 2, characterized in that: The control layer (6) comprises a processing unit (601), an ultra-high frequency signal acquisition card (602) and a power supply (603); an ultra-high frequency signal acquisition card (602) is arranged on one side of the processing unit (601); a power supply (603) is arranged on one side of the ultra-high frequency signal acquisition card (602); and the power supply (603) is fixed to the inside of the electromagnetic shielding shell (10) by means of bolts.

6. The intelligent detection device for ultra-high frequency signals of partial discharge of electrical equipment according to claim 5, characterized in that: The telescopic legs (9) comprise a telescopic motor (901) and an anti-skid leg (902); one side of the telescopic motor (901) is provided with an anti-skid leg (902); the detection data is transmitted to the processing unit (601) via the horizontal detection sensor (7), so that the processing unit (601) controls the displacement of the three groups of telescopic motors (901) so that the sensor array (5) and the detected device are kept horizontal.

7. The intelligent detection device for ultra-high frequency signals of partial discharge of electrical equipment according to claim 2, characterized in that: An indicator light (17) is provided on one side of the outer wall of the control panel (12), a connection interface (18) is provided on one side of the indicator light (17), and a charging port (19) is provided on one side of the connection interface (18).

8. The intelligent detection device for ultra-high frequency signals of partial discharge of electrical equipment according to claim 2, characterized in that: The sealing suction cup (2) is aligned with the device under test and placed by means of the handle (13), and the air pump (11) extracts air from the contact surface between the sealing suction cup (2) and the device under test through the air extraction hole (8), so that the flat plate (1) is fixed to the surface of the device under test.

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