CN114122687B - Signal detection antenna, method, system, device, detection equipment and storage medium - Google Patents
Signal detection antenna, method, system, device, detection equipment and storage medium Download PDFInfo
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- CN114122687B CN114122687B CN202111107972.7A CN202111107972A CN114122687B CN 114122687 B CN114122687 B CN 114122687B CN 202111107972 A CN202111107972 A CN 202111107972A CN 114122687 B CN114122687 B CN 114122687B
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The application relates to a signal detection antenna, a method, a system, a device, detection equipment and a storage medium. The signal detection antenna includes: the novel micro-strip antenna comprises a micro-strip line, a fractal radiator and a grounding plate, wherein one end of the micro-strip line is connected with the fractal radiator, the other end of the micro-strip line is connected with the grounding plate, the boundary of the fractal radiator is a Koch outward fractal curve structure, and the micro-strip line, the fractal radiator and the grounding plate are all of symmetrical structures. The signal detection antenna can detect electromagnetic wave signals radiated by the power equipment in all radiation directions through the fractal radiator.
Description
Technical Field
The present application relates to the field of antenna technologies, and in particular, to a signal detection antenna, a method, a system, a device, a detection apparatus, and a storage medium.
Background
Partial discharge is a cause of insulation degradation of power equipment and is also a sign of further degradation, so that occurrence and parts of partial discharge can be timely detected, and occurrence of accidents is particularly important. At present, the local discharge on-line monitoring method mainly comprises an ultrasonic method and an ultrahigh frequency method. The ultrahigh frequency method has the advantages of high sensitivity and strong anti-interference capability, and in the ultrahigh frequency method partial discharge detection system, the ultrahigh frequency antenna is a core component, and the excellent performance of the ultrahigh frequency antenna is a basic guarantee for successfully detecting partial discharge signals.
Various types of antennas are included in the conventional art, in which a fractal antenna has a self-similarity property that enables the antenna to acquire a plurality of resonance frequencies, and a space filling property that enables the antenna to extend the electrical length of the antenna in a limited space by combining the resonance frequencies, thereby achieving miniaturization. However, the existing fractal antenna has limited electromagnetic wave signals.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a signal detection antenna, a method, a system, an apparatus, a detection device, and a storage medium.
A signal detection antenna, the signal detection antenna comprising: microstrip line, fractal radiator and grounding plate;
One end of the microstrip line is connected with the fractal radiator, the other end of the microstrip line is connected with the grounding plate, the boundary of the fractal radiator is a Koch outward fractal curve structure, and the microstrip line, the fractal radiator and the grounding plate are all of symmetrical structures.
In one embodiment, the signal detection antenna further comprises a dielectric substrate, and the dielectric substrate is arranged between the fractal radiator and the ground plate.
In one embodiment, the microstrip line is rectangular, and the boundary of the fractal radiator is formed by iteration of a second-order Koch outward fractal curve.
In one embodiment, the ground plate is rectangular, and the dielectric substrate is square.
In one embodiment, the material of the grounding plate is polytetrafluoroethylene.
A method of signal detection, the method comprising:
Acquiring electromagnetic wave signals detected by an ultrahigh frequency antenna; wherein, the ultrahigh frequency antenna is the signal detection antenna in any embodiment;
Analyzing the electromagnetic wave signal to obtain an analysis result;
And comparing the characteristic of the analysis result with the characteristic of the standard partial discharge spectrogram, and determining the electromagnetic wave signal to be a partial discharge signal according to the comparison result.
In one embodiment, the comparing the characteristic of the analysis result with the characteristic of the standard partial discharge spectrogram, and determining the electromagnetic wave signal as the partial discharge signal according to the comparison result includes:
And if the characteristics of the analysis result are consistent with the characteristics of the standard partial discharge spectrogram, determining the electromagnetic wave signal as the partial discharge signal.
A signal detection system, the system comprising: the device comprises an ultrahigh frequency antenna, a transformer and detection equipment;
The ultrahigh frequency antenna is used for detecting electromagnetic wave signals radiated by the transformer and sending the electromagnetic wave signals to the detection equipment, and is a signal detection antenna in any embodiment;
the detection device is configured to perform any one of the embodiments of the signal detection method described above.
A signal detection apparatus, the apparatus comprising:
The electromagnetic wave signal acquisition module is used for acquiring electromagnetic wave signals detected by the ultrahigh frequency antenna; wherein, the ultrahigh frequency antenna is the signal detection antenna in any embodiment;
The analysis processing module is used for analyzing and processing the electromagnetic wave signals to obtain analysis results;
And the comparison module is used for comparing the characteristics of the analysis result with the characteristics of the standard partial discharge spectrogram and determining the electromagnetic wave signal to be a partial discharge signal according to the comparison result.
A detection device comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
Acquiring electromagnetic wave signals detected by an ultrahigh frequency antenna; wherein, the ultrahigh frequency antenna is the signal detection antenna in any embodiment;
Analyzing the electromagnetic wave signal to obtain an analysis result;
And comparing the characteristic of the analysis result with the characteristic of the standard partial discharge spectrogram, and determining the electromagnetic wave signal to be a partial discharge signal according to the comparison result.
A storage medium having stored thereon a computer program which when executed by a processor performs the steps of:
Acquiring electromagnetic wave signals detected by an ultrahigh frequency antenna; wherein, the ultrahigh frequency antenna is the signal detection antenna in any embodiment;
Analyzing the electromagnetic wave signal to obtain an analysis result;
And comparing the characteristic of the analysis result with the characteristic of the standard partial discharge spectrogram, and determining the electromagnetic wave signal to be a partial discharge signal according to the comparison result.
The signal detection antenna comprises a microstrip line, a fractal radiator and a grounding plate, wherein one end of the microstrip line is connected with the fractal radiator, the other end of the microstrip line is connected with the grounding plate, the boundary of the fractal radiator is a Koch outward fractal curve structure, and the microstrip line, the fractal radiator and the grounding plate are all of symmetrical structures; the signal detection antenna can detect electromagnetic wave signals radiated by the power equipment in all radiation directions through the fractal radiator.
Drawings
FIG. 1 is a schematic diagram of a signal detection antenna structure in one embodiment;
FIG. 2 is a plan view block diagram of a first order Koch fractal copper sheet in one embodiment;
FIG. 3 is a plan view block diagram of a second order Koch fractal copper sheet in one embodiment;
FIG. 4 is a diagram of the elevation angle and H-plane radiation pattern of a signal detection antenna in one embodiment;
FIG. 5 is a diagram of the elevation angle and E-plane radiation pattern of a signal detection antenna in one embodiment;
FIG. 6 is a flow chart of a signal detection method in one embodiment;
FIG. 7 is a flow chart of a signal detecting device according to another embodiment;
fig. 8 is an internal structural diagram of the detecting device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the mold body of the present application will be further described in detail by way of examples with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Fig. 1 is a schematic structural diagram of a signal detection antenna according to an embodiment, where the signal detection antenna includes: microstrip line, fractal radiator and grounding plate; one end of the microstrip line is connected with the fractal radiator, the other end of the microstrip line is connected with the grounding plate, the boundary of the fractal radiator is a Koch outward fractal curve structure, and the microstrip line, the fractal radiator and the grounding plate are all of symmetrical structures.
Specifically, the signal detection antenna may be composed of a microstrip line, a fractal radiator, and a ground plate. The microstrip line is a microwave transmission line composed of a single conductor strip, and has a planar structure, and compared with a metal waveguide, the microstrip line has the advantages of small volume, light weight, wide use band, high reliability and low manufacturing cost. Both the fractal radiator and the ground plate may be metallic materials, such as copper, aluminum, iron, or the like, or composite materials. The shapes of the microstrip line, the fractal radiator and the grounding plate can be any rectangle, circle, ellipse, deformity and the like.
It will be appreciated that any one of the locations around the microstrip line may be referred to as one end of the microstrip line and another of the locations around the microstrip line may be referred to as the other end of the microstrip line. One end of the microstrip line is connected with the fractal radiator, and the other end of the microstrip line is connected with the grounding plate, and the connection modes can be bolt connection, rivet connection, welding or bonding and the like. The fractal radiator can be a polygonal symmetrical radiator, one side of the fractal radiator is of a straight-side structure, the other sides of the fractal radiator are of a gradual-change structure, the sides with the gradual-change structure can be of a Koch outward fractal curve structure, the gradual-change structure enables the fractal radiator to have good space filling characteristics, and the fractal radiator can be of a symmetrical structure. The grounding plate has an insulating effect, and the insulating performance of the signal detection antenna can be greatly improved.
In this embodiment, the fractal radiator and the ground plate may have a planar structure. The fractal radiator can detect electromagnetic wave signals radiated by the power equipment. The power equipment may be power generation equipment, which may include transformers, generators, and the like, and power supply equipment, which may be transmission lines, transformers, contactors, and the like. In this embodiment, the implementation of the signal detection antenna by the power device determined as the transformer may be explained. The Koch outward fractal curve structure of the fractal radiator in the signal detection antenna is beneficial to reducing the size of the antenna, can realize multi-band and miniaturized design of the antenna, and is convenient to manufacture, install, move and debug.
The signal detection antenna comprises a microstrip line, a fractal radiator and a grounding plate, and the fractal radiator can be used for detecting electromagnetic wave signals radiated by power equipment in all radiation directions, so that the accuracy of whether the electromagnetic wave signals are partial discharge signals or not is improved, the safety of the power equipment is improved, the boundary of the fractal radiator is a Koch outward fractal curve structure, the gradual change structure of the fractal radiator can enable the electromagnetic wave signals absorbed by the surface of the antenna to be smoother and not easy to reflect, the impedance matching of the antenna is facilitated, and the bandwidth can be effectively expanded; meanwhile, the signal detection antenna is designed into a planar structure, has a simple structure, can realize multi-band and miniaturized design of the antenna, and is convenient to manufacture, install, move and debug; in addition, the microstrip line in the signal detection antenna can transmit the electromagnetic wave signal detected by the fractal radiator to external detection equipment, and whether the electromagnetic wave signal is a partial discharge signal of the power equipment or not is determined through the external detection equipment, so that corresponding measures can be timely taken to detect the power equipment when the partial discharge condition exists in the power equipment, and the safety of the power equipment is further improved; in addition, the fractal radiator in the signal detection antenna adopts second-order Koch to fractal outwards, which is favorable for prolonging the effective path of current, namely, the electric length of the antenna can be effectively increased in the same space, so that the lower limit cut-off frequency and resonance frequency of the antenna are reduced, and the miniaturization of the antenna is realized.
As one of the embodiments, the signal detection antenna further includes a dielectric substrate, and the dielectric substrate is disposed between the fractal radiator and the ground plate.
Specifically, the microstrip line, the fractal radiator and the grounding plate can be arranged on one side of the dielectric substrate, and can also be arranged on two sides of the dielectric substrate, and the dielectric substrate can also be connected with the microstrip line, the fractal radiator and/or the grounding plate. In this embodiment, however, the dielectric substrate may be disposed intermediate the fractal radiator and the ground plate.
The grounding plate is rectangular, and the dielectric substrate is square.
It is understood that the shape of the ground plate and the dielectric substrate may be circular, elliptical or rectangular, but in this embodiment, the ground plate may be rectangular and may be configured as a copper-clad rectangular printed circuit board, the length of the ground plate may be 115mm, the width may be 50mm, and the size of the ground plate may be other sizes, as long as the ratio of the length and the width is the same; the dielectric substrate may be square, the dielectric substrate may be made of polytetrafluoroethylene material having a relative dielectric constant of 4.3, a loss tangent of 0.02 and a size of 115×115mm, the surface of the dielectric substrate may be copper-clad, and may be processed by etching, and the size of the dielectric substrate may be set to other sizes as long as it is square.
In this embodiment, a hole may be disposed at a middle position of any long-side boundary of the ground plate, where the hole may be a cylindrical hole, and the microstrip line may penetrate through the cylindrical hole, and the middle position of the other long-side boundary of the ground plate is used as a feeding position of the microstrip line. The size of the columnar hole may be arbitrarily set as long as the microstrip line can be passed through. In addition, a hole can be arranged at the feed position of the grounding plate so as to be provided with a socket, the central pin of the socket connector can be connected with the microstrip line, and the other pins of the socket can be connected with the grounding plate. The hole shape provided at the feeding point may be the same shape as the socket shape. In this embodiment, the hole provided at the feeding position may be circular, the radius of the hole may be 4mm, the installed socket may be an SMA socket, and the connection manner of the pin of the socket and the microstrip line may be welding. The signal detection antenna can transmit electromagnetic wave signals in a microstrip line feeding mode, and can also adopt coaxial line feeding or electromagnetic coupling feeding modes and the like, so that the signal detection antenna is not limited.
The signal detection antenna can transmit the detected electromagnetic wave signal to the external detection equipment, and the external detection equipment is used for determining whether the electromagnetic wave signal is a partial discharge signal of the power equipment, so that corresponding measures can be timely taken to detect the power equipment when the partial discharge condition exists in the power equipment, and the safety of the power equipment is further improved.
As one of the embodiments, the microstrip line is rectangular, and the boundary of the fractal radiator is formed by iteration of a second-order Koch outward fractal curve.
In this embodiment, the microstrip line may be rectangular, and the dimensions of the microstrip line may be set to 40mm in length and 3mm in width, and the dimensions of the microstrip line may be set to other dimensions as long as the ratio of the length and the width is the same.
It is understood that the fractal radiator may be a fractal copper sheet, and the fractal radiator is manufactured on the basis of a regular polygon copper sheet. Taking a regular quadrilateral copper sheet as an illustration of the manufacturing process of the fractal radiator, carrying out multi-order Koch outward fractal curve iteration on any three sides (namely boundaries) of the regular quadrilateral copper sheet, and increasing the surface area of the regular quadrilateral copper sheet. In this embodiment, the second order Koch outward fractal curve iteration may be performed on a regular quadrilateral copper sheet.
The process of iteration of the first-order Koch outward fractal curve can be understood as dividing each edge of any three edges in the regular tetragonal copper sheet into three parts equally, taking the middle part as the edge, making an equilateral triangle towards the external direction of the regular tetragonal copper sheet, increasing the surface area of the regular tetragonal copper sheet to obtain the first-order Koch fractal copper sheet, wherein the plane structure of the first-order Koch fractal copper sheet is shown as a figure 2, the increased surface area of the regular tetragonal copper sheet can be equal to the sum of the areas of each equilateral triangle, and the edge length of the equilateral triangle can be 1/3 of the edge length of the regular tetragonal copper sheet; the process of the second-order Koch outward fractal curve iteration can be understood as equally dividing each side after the fractal in the first-order Koch fractal copper sheet into three parts, taking the middle part as the side, making an equilateral triangle towards the outer direction of the first-order Koch fractal copper sheet, and increasing the surface area of the first-order Koch fractal copper sheet to obtain the second-order Koch fractal copper sheet. Or the fractal radiator can be understood as a structure obtained by carrying out second-order Koch outward fractal curve iteration on the zero-order fractal copper sheet, the second-order Koch outward fractal curve iteration can be understood as dividing each of any three sides in the zero-order fractal copper sheet into three parts, rotating the left end point of the middle part counterclockwise by 60 degrees with the right end point as the vertex and rotating the right end point clockwise by 60 degrees to form a first-order Koch fractal copper sheet, then carrying out Koch outward fractal curve iteration on the first-order Koch fractal copper sheet again, and finally forming a second-order Koch fractal copper sheet, namely the fractal radiator, wherein the plane structure of the second-order Koch fractal copper sheet is shown in figure 3. The zero-order fractal copper sheet may be a regular quadrilateral copper sheet, which in this embodiment may be set to 40mm, and the thickness may be set to 0.5mm.
The boundary of the fractal radiator in the signal detection antenna can be formed by iteration of a second-order Koch outward fractal curve, the gradual change structure of the fractal radiator can enable electromagnetic wave signals absorbed by the surface of the antenna to be smoother and not easy to reflect, impedance matching of the antenna is facilitated, bandwidth can be effectively expanded, electromagnetic wave signals radiated by power equipment in all radiation directions can be detected through the fractal radiator, and therefore accuracy of whether the electromagnetic wave signals are partial discharge signals or not is improved, and safety of the power equipment is improved; in addition, the fractal radiator in the signal detection antenna adopts second-order Koch to fractal outwards, which is favorable for prolonging the effective path of current, namely, the electric length of the antenna can be effectively increased in the same space, so that the lower limit cut-off frequency and resonance frequency of the antenna are reduced, and the miniaturization of the antenna is realized.
In one embodiment, the material of the ground plate is polytetrafluoroethylene.
In particular, the ground plate may also be referred to as a dielectric layer. The grounding plate is made of insulating materials such as polycarbonate, mylar, nylon and the like, and the insulating materials can be flexibly selected according to actual conditions. In order to ensure that the insulation has better physical and chemical properties, the grounding plate is made of polytetrafluoroethylene materials.
In addition, when the attribute parameter of the signal detection antenna is set to the specific value, and the frequency of the signal detection antenna is set to 1.0GHz, the electromagnetic wave signal radiated by the power equipment is detected by using the set signal detection antenna, and the generated H-plane radiation pattern is shown in fig. 4, and the radiation pattern of the H-plane in the drawing has approximate symmetry and is approximate to a circle, so that the omnidirectional radiation performance of the signal detection antenna designed in the embodiment can be reflected to be better. The attribute parameters of the signal detection antenna may be size parameters, characteristic parameters, and the like of the respective structures in the signal detection antenna. The largest circle in fig. 4 can represent radiation direction angles between 0 ° and 360 °,0, -10, -20, -30 and-40 in the figure represent gains of the signal detection antennas, two closed dotted curves can represent pitch angles of the received signal detection antennas, a closed solid curve inside the largest circle represents azimuth angles of the received signal detection antennas, and accordingly, the radiation direction diagram of the signal detection antennas can be obtained, the pitch angle component of the signal detection antennas is stable at a frequency of 1.0GHz and is in an 8-like shape, and the radiation direction diagram of the H plane has approximate symmetry and is approximately circular. According to the simulation result, the performance of the signal detection antenna is higher. Meanwhile, fig. 5 also shows a corresponding E-plane radiation pattern generated by the signal detection antenna. The E-plane is an electric field in the electromagnetic field, and the H-plane is a magnetic field in the electromagnetic field.
The size and the material of the grounding plate in the signal detection antenna are set to be the optimal size and the optimal material, so that the insulating performance of the signal detection antenna can be greatly improved.
Fig. 6 is a schematic flow chart of a signal detection method according to an embodiment, and the method is applied to a detection device for illustration, and includes the following steps:
S100, acquiring electromagnetic wave signals detected by an ultrahigh frequency antenna; the uhf antenna is the signal detection antenna in the embodiment corresponding to fig. 1.
Specifically, the transformer can excite an electromagnetic wave signal with an ultrahigh frequency when in partial discharge, the highest frequency can reach GHz, and the signal detection antenna can receive the electromagnetic wave signal with the ultrahigh frequency radiated in the partial discharge process. However, since the transformer can normally excite electromagnetic wave signals with other frequencies, the electromagnetic wave signals need to be sent to the detection device, so that the detection device further analyzes the electromagnetic wave signals to determine whether the electromagnetic wave signals are partial discharge signals.
It will be appreciated that the signal detection antenna may detect an electromagnetic wave signal radiated by the power device and transmit the detected electromagnetic wave signal to the detection device via the microstrip line, the detection device receiving the electromagnetic wave signal. The further detection device may perform a series of processing on the electromagnetic wave signal to determine whether the electromagnetic wave signal is a partial discharge signal of the power device. The above-mentioned power equipment may be power generation equipment and power supply equipment, the power generation equipment may include a transformer, a generator, and the like, the power supply equipment may be a transmission line, a transformer, a contactor, and the like, and in this embodiment, the power equipment may be determined as the implementation manner of the transformer on the signal detection antenna.
S200, analyzing and processing the electromagnetic wave signals to obtain analysis results.
Specifically, the detection device may analyze the electromagnetic wave signal to obtain an analysis result. In this embodiment, the analysis processing may include detection, amplification, filtering, separation, classification, and other processes, and during the analysis processing, the electromagnetic wave signal may be detected, amplified, and filtered first, and the execution sequences of the three may be interchanged, and on the basis of this, the obtained signal may be separated and classified, and between the two, the separation processing is performed first and then the classification processing is performed. Alternatively, the analysis result may be the signal after analysis.
S300, comparing the characteristic of the analysis result with the characteristic of the standard partial discharge spectrogram, and determining the electromagnetic wave signal as the partial discharge signal according to the comparison result.
Specifically, the detection device may compare the characteristics of the signal after analysis with the spectrogram characteristics of the standard partial discharge spectrogram stored in the detection device database in advance, and determine that the electromagnetic wave signal is a partial discharge signal according to the comparison result. The comparison can be understood as a feature alignment. The comparison result may include that the characteristic of the analysis result is consistent with the characteristic of the standard partial discharge spectrum and that the characteristic of the analysis result is inconsistent with the characteristic of the standard partial discharge spectrum.
The step of comparing the feature of the analysis result with the feature of the standard partial discharge spectrogram and determining that the electromagnetic wave signal is the partial discharge signal according to the comparison result in S300 may include: and if the characteristics of the analysis result are consistent with the characteristics of the standard partial discharge spectrogram, determining the electromagnetic wave signal as a partial discharge signal.
In this embodiment, if the detection device compares the characteristics of the analysis result with the characteristics of the standard partial discharge spectrum, the electromagnetic wave signal may be determined as the partial discharge signal.
In the signal detection method, an electromagnetic wave signal detected by an ultrahigh frequency antenna is obtained, the electromagnetic wave signal is analyzed and processed to obtain an analysis result, the characteristics of the analysis result are compared with the characteristics of a standard partial discharge spectrogram, and the electromagnetic wave signal is determined to be a partial discharge signal according to the comparison result; according to the method, electromagnetic wave signals in all radiation directions can be detected through the ultrahigh frequency antenna, a series of processing can be carried out on the electromagnetic wave signals, so that whether the electromagnetic wave signals are partial discharge signals or not is determined, and when the electromagnetic wave signals are determined to be the partial discharge signals, corresponding measures can be timely taken to detect and process the power equipment, so that the safety of the power equipment is improved.
Another embodiment provides a signal detection system; the signal detection system comprises an ultrahigh frequency antenna, a transformer and detection equipment;
The ultrahigh frequency antenna is used for detecting electromagnetic wave signals radiated by the transformer and transmitting the electromagnetic wave signals to the detection equipment, and is a signal detection antenna in the embodiment corresponding to the figure 1;
The detection device is used for executing the method in the corresponding embodiment of fig. 6.
Specifically, due to the miniaturized structure of the ultrahigh frequency antenna, the ultrahigh frequency antenna can be suitable for being mounted on the inner wall of the box body of the transformer, no image is generated for the safe operation of the transformer, and the field detection requirement can be met. In general, a wire can be led out from a feed position at the lower end of a microstrip line in the ultrahigh frequency antenna, and then the wire is connected with external detection equipment, so that the detection equipment further analyzes and processes electromagnetic wave signals. The detection device may include a sensor, an amplifier, a detector, a filter, a demultiplexer, a classifier, etc.
The signal detection system provided in this embodiment may execute the above method embodiment, and its implementation principle and technical effects are similar, and will not be described herein.
It should be understood that, although the steps in the flowchart of fig. 6 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least a portion of the steps in fig. 6 may include a plurality of steps or stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the execution of the steps or stages is not necessarily sequential, but may be performed in rotation or alternately with at least a portion of the steps or stages in other steps or stages.
In one embodiment, as shown in fig. 7, there is provided a signal detection apparatus including: an electromagnetic wave signal acquisition module 11, an analysis processing module 12, and a comparison module 13, wherein:
an electromagnetic wave signal acquisition module 11, configured to acquire an electromagnetic wave signal detected by the uhf antenna; the uhf antenna is the signal detection antenna in the embodiment corresponding to fig. 1;
an analysis processing module 12, configured to perform analysis processing on the electromagnetic wave signal to obtain an analysis result;
A comparison module 13 for comparing the analysis result with the standard partial discharge spectrogram and determining the electromagnetic wave signal as partial discharge signal according to the comparison result
The signal detection device provided in this embodiment may perform the above method embodiment, and its implementation principle and technical effects are similar, and are not described herein again.
In one embodiment, the comparing module 13 is specifically configured to determine the electromagnetic wave signal as the partial discharge signal when the characteristic of the analysis result is consistent with the characteristic of the standard partial discharge spectrogram.
The signal detection device provided in this embodiment may perform the above method embodiment, and its implementation principle and technical effects are similar, and are not described herein again.
For specific limitations of the signal detection device, reference may be made to the above limitations of the signal detection method, and no further description is given here. The respective modules in the above-described signal detection apparatus may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or independent of a processor in a server, or may be stored in software in a memory in the server, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a detection device is provided, the internal structure of which may be as shown in fig. 8. The detection device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the detection device is adapted to provide computing and control capabilities. The memory of the detection device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the detection device is used for storing electromagnetic wave signals and standard partial discharge spectrograms. The network interface of the detection device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a signal detection method.
It will be appreciated by those skilled in the art that the structure shown in fig. 8 is merely a block diagram of a portion of the structure associated with the present inventive arrangements and is not limiting of the server to which the present inventive arrangements are applied, and that a particular server may include more or fewer components than shown, or may combine some of the components, or have a different arrangement of components.
In one embodiment, a detection device is provided, comprising a memory and a processor, the memory having stored therein a computer program, the processor, when executing the computer program, performing the steps of:
Acquiring electromagnetic wave signals detected by an ultrahigh frequency antenna; the uhf antenna is the signal detection antenna in the embodiment corresponding to fig. 1;
analyzing and processing the electromagnetic wave signals to obtain analysis results;
And comparing the characteristic of the analysis result with the characteristic of the standard partial discharge spectrogram, and determining the electromagnetic wave signal as the partial discharge signal according to the comparison result.
In one embodiment, a storage medium having a computer program stored thereon, the computer program when executed by a processor performing the steps of:
Acquiring electromagnetic wave signals detected by an ultrahigh frequency antenna; the uhf antenna is the signal detection antenna in the embodiment corresponding to fig. 1;
analyzing and processing the electromagnetic wave signals to obtain analysis results;
And comparing the characteristic of the analysis result with the characteristic of the standard partial discharge spectrogram, and determining the electromagnetic wave signal as the partial discharge signal according to the comparison result.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory. By way of illustration, and not limitation, RAM can be in various forms such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (10)
1. A signal detection antenna, the signal detection antenna comprising: microstrip line, fractal radiator, grounding plate and dielectric substrate; the dielectric substrate is arranged between the fractal radiator and the grounding plate;
One end of the microstrip line is connected with the fractal radiator, the other end of the microstrip line is connected with the grounding plate, the boundary of the fractal radiator is of a Koch outward fractal curve structure, the microstrip line, the fractal radiator and the grounding plate are all of symmetrical structures, the microstrip line is rectangular, and the boundary of the fractal radiator is formed by iteration of a second-order Koch outward fractal curve.
2. The signal detection antenna of claim 1, wherein the ground plate is rectangular and the dielectric substrate is square.
3. The signal detection antenna of claim 2, wherein the ground plate is made of polytetrafluoroethylene.
4. The signal detection antenna of claim 1, wherein the fractal radiator is fabricated on the basis of a regular polygonal copper sheet.
5. A method of signal detection, the method comprising:
Acquiring electromagnetic wave signals detected by an ultrahigh frequency antenna; wherein the uhf antenna is the signal detection antenna of any one of the preceding claims 1-4;
Analyzing the electromagnetic wave signal to obtain an analysis result;
And comparing the characteristic of the analysis result with the characteristic of the standard partial discharge spectrogram, and determining the electromagnetic wave signal to be a partial discharge signal according to the comparison result.
6. The method of claim 5, wherein comparing the characteristic of the analysis result with a standard partial discharge spectrum characteristic and determining the electromagnetic wave signal as a partial discharge signal based on the comparison result comprises:
And if the characteristics of the analysis result are consistent with the characteristics of the standard partial discharge spectrogram, determining the electromagnetic wave signal as the partial discharge signal.
7. A signal detection system, the system comprising: the device comprises an ultrahigh frequency antenna, a transformer and detection equipment;
the ultrahigh frequency antenna is used for detecting electromagnetic wave signals radiated by the transformer and sending the electromagnetic wave signals to the detection equipment, and is a signal detection antenna according to any one of the claims 1-4;
The detection device for performing the method of any of the preceding claims 5-6.
8. A signal detection apparatus, the apparatus comprising:
The electromagnetic wave signal acquisition module is used for acquiring electromagnetic wave signals detected by the ultrahigh frequency antenna; wherein the ultrahigh frequency antenna is the signal detection antenna described in the claims 1-4;
The analysis processing module is used for analyzing and processing the electromagnetic wave signals to obtain analysis results;
And the comparison module is used for comparing the characteristics of the analysis result with the characteristics of the standard partial discharge spectrogram and determining the electromagnetic wave signal to be a partial discharge signal according to the comparison result.
9. A detection device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 5-6 when the computer program is executed.
10. A storage medium having stored thereon a computer program, which when executed by a processor performs the steps of the method according to any of claims 5-6.
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| CN104730426A (en) * | 2013-12-20 | 2015-06-24 | 国家电网公司 | Sensor and discharge signal detection method |
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| CN203398304U (en) * | 2013-08-30 | 2014-01-15 | 川开电气股份有限公司 | Microstrip fractal antenna loaded with short circuit probe |
| CN203643513U (en) * | 2013-12-20 | 2014-06-11 | 国家电网公司 | Sensor |
| CN107121625B (en) * | 2017-06-12 | 2019-12-31 | 华北电力大学（保定） | Miniature LS Peano fractal antenna for partial discharge ultrahigh frequency detection |
| CN209401844U (en) * | 2019-03-13 | 2019-09-17 | 深圳供电局有限公司 | Partial Discharge Detection antenna |
| CN110581358B (en) * | 2019-09-21 | 2021-02-09 | 华北电力大学（保定） | Hollow arc antenna internally arranged in GIS basin-type insulator and design method thereof |
| CN111478031A (en) * | 2020-04-22 | 2020-07-31 | 云南电网有限责任公司电力科学研究院 | Fractal antenna for ultrahigh frequency detection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102629708A (en) * | 2011-12-27 | 2012-08-08 | 广西工学院 | WIFI (wireless fidelity) mobile terminal plane antenna |
| CN104730426A (en) * | 2013-12-20 | 2015-06-24 | 国家电网公司 | Sensor and discharge signal detection method |
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