CN114122687A - 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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- 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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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
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- H01Q—ANTENNAS, i.e. RADIO AERIALS
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Abstract
The application relates to a signal detection antenna, a method, a system, a device, a detection device and a storage medium. The signal detection antenna includes: the fractal antenna comprises a microstrip line, a fractal radiator and a ground 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 ground plate, the boundary of the fractal radiator is a Koch outward fractal curve structure, and the microstrip line, the fractal radiator and the ground plate are all of symmetrical structures. The signal detection antenna can detect electromagnetic wave signals radiated from the power equipment in various 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 signal detection method, a signal detection system, a signal detection apparatus, and a storage medium.
Background
The partial discharge is a cause of insulation degradation of the power equipment and is also a sign of further degradation of the power equipment, so that occurrence and positions of the partial discharge can be detected in time, and it is important to avoid accidents. At present, the on-line monitoring method for partial discharge 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, an 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.
The conventional technology includes various types of antennas, wherein a fractal antenna has self-similarity and space filling properties, the self-similarity enables the antenna to acquire multiple resonant frequencies, the antenna has ultra-wideband characteristics by combining the resonant frequencies, and the space filling properties enable the antenna to extend the electrical length of the antenna in a limited space, so as to achieve miniaturization. However, the existing fractal antenna has limited electromagnetic wave signals to be received.
Disclosure of Invention
In view of the above, it is necessary to provide a signal detection antenna, a method, a system, a device, a detection apparatus and a storage medium for solving the above technical problems.
A signal detection antenna, the signal detection antenna comprising: microstrip line, fractal radiator and ground plate;
one end of the microstrip line is connected with the fractal radiator, the other end of the microstrip line is connected with the ground plate, the boundary of the fractal radiator is of a Koch outward fractal curve structure, and the microstrip line, the fractal radiator and the ground plate are all of symmetrical structures.
In one embodiment, the signal detection antenna further includes a dielectric substrate disposed 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 grounding 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 an electromagnetic wave signal detected by an ultrahigh frequency antenna; wherein, the uhf antenna is the signal detection antenna in any of the above embodiments;
analyzing and processing the electromagnetic wave signal to obtain an analysis result;
and comparing the characteristics of the analysis result with the characteristics of a standard partial discharge spectrogram, and determining the electromagnetic wave signal as a partial discharge signal according to the comparison result.
In one embodiment, the comparing the characteristics of the analysis result with the characteristics of a standard partial discharge spectrogram and determining the electromagnetic wave signal as a partial discharge signal according to the comparison result includes:
and if the characteristics of the analysis result are consistent with the characteristics of a standard partial discharge spectrogram, determining the electromagnetic wave signal as the partial discharge signal.
A signal detection system, the system comprising: the 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 sending the electromagnetic wave signals to the detection equipment, and the ultrahigh frequency antenna is a signal detection antenna in any one of the embodiments;
the detection device is used for executing any embodiment of the signal detection method.
A signal detection apparatus, the apparatus comprising:
the electromagnetic wave signal acquisition module is used for acquiring the electromagnetic wave signal detected by the ultrahigh frequency antenna; wherein, the uhf antenna is the signal detection antenna in any of the above embodiments;
the analysis processing module is used for analyzing and processing the electromagnetic wave signals to obtain an analysis result;
and the comparison module is used for comparing the characteristics of the analysis result with the characteristics of a standard partial discharge spectrogram and determining the electromagnetic wave signal as a partial discharge signal according to the comparison result.
A detection apparatus comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
acquiring an electromagnetic wave signal detected by an ultrahigh frequency antenna; wherein, the uhf antenna is the signal detection antenna in any of the above embodiments;
analyzing and processing the electromagnetic wave signal to obtain an analysis result;
and comparing the characteristics of the analysis result with the characteristics of a standard partial discharge spectrogram, and determining the electromagnetic wave signal as 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 an electromagnetic wave signal detected by an ultrahigh frequency antenna; wherein, the uhf antenna is the signal detection antenna in any of the above embodiments;
analyzing and processing the electromagnetic wave signal to obtain an analysis result;
and comparing the characteristics of the analysis result with the characteristics of a standard partial discharge spectrogram, and determining the electromagnetic wave signal as a partial discharge signal according to the comparison result.
The signal detection antenna comprises a microstrip line, a fractal radiator and an earth 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 earth plate, the boundary of the fractal radiator is a Koch outward fractal curve structure, and the microstrip line, the fractal radiator and the earth plate are all of symmetrical structures; the signal detection antenna can detect electromagnetic wave signals radiated from the power equipment in various radiation directions through the fractal radiator.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a signal detection antenna;
FIG. 2 is a plan view of a first order Koch fractal copper sheet in one embodiment;
FIG. 3 is a plan view of a second order Koch fractal copper sheet in one embodiment;
FIG. 4 is a pitch angle and H-plane radiation pattern of a signal detection antenna in one embodiment;
FIG. 5 is a perspective view of the pitch angle and E-plane radiation pattern of the signal detection antenna in one embodiment;
FIG. 6 is a flow chart illustrating a signal detection method according to an embodiment;
FIG. 7 is a schematic flow chart of a signal detection apparatus according to another embodiment;
FIG. 8 is a diagram illustrating the internal structure of the inspection apparatus 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 is further described in detail by the following embodiments, in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation 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 ground plate; one end of the microstrip line is connected with the fractal radiator, the other end of the microstrip line is connected with the ground plate, the boundary of the fractal radiator is of a Koch outward fractal curve structure, and the microstrip line, the fractal radiator and the ground 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, has a planar structure, and has a small volume, a light weight, a wide use frequency band, high reliability and low manufacturing cost compared with a metal waveguide. The fractal radiator and the ground plate can be both of a metallic material such as copper, aluminum, iron, or the like, or a composite material. The shapes of the microstrip line, the fractal radiator and the grounding plate can be any rectangle, circle, ellipse, deformity and the like.
It is understood that any one of the peripheral portions of the microstrip line may be referred to as one end of the microstrip line, and the other peripheral portion 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 ground plate, wherein the connection mode 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 a straight-side structure, the other sides of the fractal radiator are gradient structures, the side with the gradient structure can be a Koch outward fractal curve structure, the gradient structures enable the fractal radiator to have good space filling characteristics, and the fractal radiator can be a symmetrical structure. The grounding plate has an insulation function, and the insulation performance of the signal detection antenna can be greatly improved.
In this embodiment, the fractal radiator and the ground plate may also be a planar structure. Wherein, the fractal radiator can detect the electromagnetic wave signal that power equipment radiated. The power equipment may be power generation equipment and power supply equipment, the power generation equipment may include a transformer, a generator, and the like, and the power supply equipment may be a transmission line, a transformer, a contactor, and the like. In the present embodiment, the implementation of the signal detection antenna may be explained by determining the power device as a transformer. 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 the 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 ground plate, wherein electromagnetic wave signals radiated from the power equipment in each radiation direction can be detected through the fractal radiator, 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 arrangement of the gradient 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 to be a plane 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 the external detection equipment is used for determining whether the electromagnetic wave signal is a partial discharge signal of the power equipment, so that when the power equipment has a partial discharge condition, corresponding measures can be taken in time to detect 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 outward fractal, which is beneficial to prolonging the effective path of current, namely, the electrical length of the antenna can be effectively increased in the same space, so that the lower limit cut-off frequency and the resonant frequency of the antenna are reduced, and the miniaturization of the antenna is realized.
As one embodiment, the signal detection antenna further includes a dielectric substrate disposed between the fractal radiator and the ground plate.
Specifically, the microstrip line, the fractal radiator and the ground 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 ground plate. In this embodiment, however, the dielectric substrate may be disposed between the fractal radiator and the ground plate.
The grounding plate is rectangular, and the dielectric substrate is square.
It can be understood that the shape of the ground plate and the dielectric substrate can be circular, oval or rectangular, but in this embodiment, the ground plate can be rectangular and can be configured as a copper-clad rectangular printed circuit board, the length of the ground plate can be set to 115mm, the width can be set to 50mm, and the size of the ground plate can be set to other sizes as long as the ratio of the length to the width is the same; the dielectric substrate can be square, the dielectric substrate can be made of polytetrafluoroethylene materials with the relative dielectric constant of 4.3, the loss tangent of 0.02 and the size of 115mm multiplied by 115mm, the surface of the dielectric substrate can be coated with copper and can be processed by etching technology, and the size of the dielectric substrate can be set to other sizes as long as the dielectric substrate is square.
In this embodiment, a hole may be disposed at a middle position of any long side boundary of the ground plate, the hole may be a cylindrical hole, the microstrip line may penetrate through the cylindrical hole, and a 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 cylindrical hole can be set arbitrarily as long as the microstrip line can pass through the cylindrical hole. In addition, a hole can be arranged at the feeding position of the grounding plate so as to install a socket, the central pin of the socket connector can be connected with the microstrip line, and other pins of the socket can be connected with the grounding plate. The shape of the hole provided at the power feed point can be the same as the shape of the socket. In this embodiment, the hole provided at the feeding portion may be circular, the radius of the hole may be 4mm, the installed socket may be an SMA socket, and the connection manner between the pin of the socket and the microstrip line may be welding. The signal detection antenna may adopt a microstrip line feeding mode to transmit electromagnetic wave signals, and may also adopt a coaxial line feeding mode or an electromagnetic coupling feeding mode, and the like, which 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 when the power equipment has a partial discharge condition, corresponding measures can be taken in time to detect and process the power equipment, and the safety of the power equipment is further improved.
As 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 this embodiment, the microstrip line may be rectangular, the size of the microstrip line may be set to be 40mm in length and 3mm in width, and the size of the microstrip line may also be set to be other sizes as long as the ratio of the length to 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 polygonal copper sheet. The manufacturing process of the fractal radiator is explained by taking a regular quadrilateral copper sheet as an example, and any three sides (namely boundaries) of the regular quadrilateral copper sheet are subjected to multi-order Koch outward fractal curve iteration, so that the surface area of the regular quadrilateral copper sheet is increased. In this embodiment, a second-order Koch outward fractal curve iteration may be performed on the positive quadrilateral copper sheet.
The iterative process of the first-order Koch outward fractal curve can be understood as that each of any three sides in the regular quadrilateral copper sheet is equally divided into three parts, an equilateral triangle is made towards the outer direction of the regular quadrilateral copper sheet by taking the middle part as the side, the surface area of the regular quadrilateral copper sheet is increased, and the first-order Koch fractal copper sheet is obtained, wherein the planar structure of the first-order Koch fractal copper sheet is shown in fig. 2, wherein the increased surface area of the regular quadrilateral copper sheet can be equal to the sum of the areas of each equilateral triangle, and the side length of the equilateral triangle can be 1/3 of the side length of the regular quadrilateral copper sheet; the second-order Koch outward fractal curve iteration process can be understood as that each edge after fractal in the first-order Koch fractal copper sheet is equally divided into three parts, an equilateral triangle is made towards the outer direction of the first-order Koch fractal copper sheet by taking the middle part as the edge, the surface area of the first-order Koch fractal copper sheet is increased, and the second-order Koch fractal copper sheet is obtained. Or, the fractal radiator may be understood as a structure obtained by performing second-order Koch outward fractal curve iteration on a zero-order fractal copper sheet, the second-order Koch outward fractal curve iteration may also be understood as equally dividing each of any three sides in the zero-order fractal copper sheet into three parts, counterclockwise rotating by 60 ° with the left end point of the middle part as the vertex and clockwise rotating by 60 ° with the right end point as the vertex to form a first-order Koch fractal copper sheet, and then performing Koch outward fractal curve iteration on the first-order Koch fractal copper sheet again to finally form a second-order Koch fractal copper sheet, that is, the fractal radiator, where the planar structure of the second-order Koch fractal copper sheet is shown in fig. 3. The zero-order fractal copper sheet can be a regular quadrilateral copper sheet, the thickness of the regular quadrilateral copper sheet can be set to be 40mm, and the thickness of the regular quadrilateral copper sheet can be set to be 0.5 mm.
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 gradient 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, the bandwidth can be effectively expanded, and the fractal radiator can be used for detecting the electromagnetic wave signals radiated by the power equipment from all radiation directions, so that the accuracy of whether the electromagnetic wave signals are partial discharge signals is improved, and the safety of the power equipment is improved; in addition, the fractal radiator in the signal detection antenna adopts second-order Koch outward fractal, which is beneficial to prolonging the effective path of current, namely, the electrical length of the antenna can be effectively increased in the same space, so that the lower limit cut-off frequency and the resonant frequency of the antenna are reduced, and the miniaturization of the antenna is realized.
In one embodiment, the material of the grounding 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 make the insulation have better physical and chemical properties, the grounding plate is made of polytetrafluoroethylene materials.
In addition, when the attribute parameters of the signal detection antenna are set to the specific values, and the frequency of the signal detection antenna is set to 1.0GHz, the set signal detection antenna is used to detect the electromagnetic wave signal radiated by the power equipment, and the generated H-plane radiation pattern is as shown in fig. 4, where the H-plane radiation pattern has approximate symmetry and is approximately circular, so that the omnidirectional radiation performance of the signal detection antenna designed in this 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 each structure in the signal detection antenna. The largest circle in fig. 4 may represent a radiation direction angle between 0 ° and 360 °, 0, -10, -20, -30, and-40 in the figure represent gains of the signal detection antenna, two closed dotted curves may represent a pitch angle of the received signal detection antenna, and a closed solid curve inside the largest circle represents an azimuth angle of the received signal detection antenna, so that it can be obtained that a radiation pattern of the signal detection antenna has approximate symmetry, fig. 4 represents that a pitch angle component of the signal detection antenna is stable at a frequency of 1.0GHz and has a shape similar to "8", and a radiation pattern of the H-plane has approximate symmetry and is approximately circular. According to the simulation result, the performance of the signal detection antenna is high. Meanwhile, fig. 5 also shows the corresponding E-plane radiation pattern generated by the signal detection antenna. The E-plane is an electric field in an electromagnetic field, and the H-plane is a magnetic field in an electromagnetic field.
The size and the material of the grounding plate in the signal detection antenna are set to be the optimal size and material, so that the insulating property of the signal detection antenna can be greatly improved.
Fig. 6 is a schematic flowchart of a signal detection method according to an embodiment, which is described by taking the method as an example and includes the following steps:
s100, acquiring an electromagnetic wave signal detected by the ultrahigh frequency antenna; the uhf antenna is the signal detection antenna in the embodiment corresponding to fig. 1.
Specifically, when the inside of the transformer is subjected to partial discharge, an electromagnetic wave signal with a very high frequency can be excited, the highest frequency can reach GHz, and the signal detection antenna can receive the electromagnetic wave signal with the very high frequency radiated in the partial discharge process. However, since the transformer can normally excite the electromagnetic wave signals with other frequencies, the electromagnetic wave signals need to be transmitted to the detection device, and the detection device further analyzes and processes the electromagnetic wave signals to determine whether the electromagnetic wave signals are partial discharge signals.
It can be understood that the signal detection antenna can detect an electromagnetic wave signal radiated by the power device and transmit the detected electromagnetic wave signal to the detection device through the microstrip line, and the detection device receives the electromagnetic wave signal. Further, the detection device may perform a series of processes on the electromagnetic wave signal to determine whether the electromagnetic wave signal is a partial discharge signal of the power device. In this embodiment, the power device may be determined as a transformer to explain an implementation of the signal detection antenna.
And S200, analyzing the electromagnetic wave signals to obtain an analysis result.
Specifically, the detection device may analyze the electromagnetic wave signal to obtain an analysis result. In this embodiment, the analysis process may include detection, amplification, filtering, separation, classification, and the like, and the analysis process may be performed by first detecting, amplifying, and filtering the electromagnetic wave signal, and the execution order of the three may be interchanged, and then the obtained signal is separated and classified, and then the separation process is performed first and then the classification process is performed between the two. Alternatively, the analysis result may be an analyzed signal.
S300, comparing the characteristics of the analysis result with the characteristics of the standard partial discharge spectrogram, and determining the electromagnetic wave signal as a partial discharge signal according to the comparison result.
Specifically, the detection device may compare the feature of the analyzed signal with a spectrogram feature of a standard partial discharge spectrogram pre-stored in a detection device database, and determine the electromagnetic wave signal as a partial discharge signal according to the comparison result. Comparison may be understood as feature alignment. The comparison result may include that the feature of the analysis result is consistent with the standard partial discharge spectrogram feature and that the feature of the analysis result is inconsistent with the standard partial discharge spectrogram feature.
In S300, the step of 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 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 characteristics of the analysis result are determined to be consistent with the characteristics of the standard partial discharge spectrogram after the comparison by the detection device, the electromagnetic wave signal may be determined as a partial discharge signal.
The signal detection method comprises the steps of obtaining an electromagnetic wave signal detected by an ultrahigh frequency antenna, analyzing the electromagnetic wave signal to obtain an analysis result, comparing the characteristics of the analysis result with the characteristics of a standard partial discharge spectrogram, and determining the electromagnetic wave signal as a partial discharge signal according to the comparison result; the method can detect the electromagnetic wave signals in all radiation directions through the ultrahigh frequency antenna, and can carry out a series of processing on the electromagnetic wave signals, so as to determine whether the electromagnetic wave signals are partial discharge signals, and when the electromagnetic wave signals are determined to be the partial discharge signals, corresponding measures can be timely taken to carry out detection processing on 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 sending the electromagnetic wave signals to the detection equipment, and the ultrahigh frequency antenna is the signal detection antenna in the embodiment corresponding to the above-mentioned fig. 1;
a detection device for performing the method of the corresponding embodiment of fig. 6 described above.
Particularly, due to the miniaturized structure of the ultrahigh frequency antenna, the ultrahigh frequency antenna can be suitable for being installed on the inner wall of the box body of the transformer, no image is generated on the safe operation of the transformer, and the requirement of field detection can be met. Generally, a lead can be led out from a feed position at the lower end of a microstrip line in the ultrahigh frequency antenna, and then the feed position is connected with external detection equipment through the lead, so that the detection equipment further analyzes and processes electromagnetic wave signals. The detection device may include sensors, amplifiers, detectors, filters, signal splitters, classifiers, and the like.
The signal detection system provided in this embodiment may implement the method embodiments described above, and the implementation principle and technical effect are similar, which are not described herein again.
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 performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in fig. 6 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least a portion of the other steps or stages.
In one embodiment, as shown in fig. 7, there is provided a signal detection apparatus including: electromagnetic wave signal acquisition module 11, analysis processing module 12 and comparison module 13, wherein:
an electromagnetic wave signal obtaining module 11, configured to obtain an electromagnetic wave signal detected by the uhf antenna; wherein, the uhf antenna is the signal detection antenna in the embodiment corresponding to fig. 1;
the analysis processing module 12 is configured to perform analysis processing on the electromagnetic wave signal to obtain an analysis result;
a comparison module 13 for comparing the characteristics of the analysis result with the characteristics of the standard partial discharge spectrogram and determining the electromagnetic wave signal as a partial discharge signal according to the comparison result
The signal detection apparatus provided in this embodiment may implement the method embodiments described above, and the implementation principle and the technical effect are similar, which 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 feature of the analysis result is consistent with the standard partial discharge spectrogram feature.
The signal detection apparatus provided in this embodiment may implement the method embodiments described above, and the implementation principle and the technical effect are similar, which 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, which are not described herein again. The modules in the signal detection device can be wholly or partially implemented by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent of a processor in the server, and can also be stored in a memory in the server in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a detection device is provided, and the internal structure of the detection device can 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 configured to provide computational 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, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the detection device is used for storing the electromagnetic wave signals and the standard partial discharge spectrogram. The network interface of the detection device is used for connecting and communicating with an external terminal through a network. The computer program is executed by a processor to implement a signal detection method.
Those skilled in the art will appreciate that the architecture shown in fig. 8 is a block diagram of only a portion of the architecture associated with the subject application, and does not constitute a limitation on the servers to which the subject application applies, as a particular server may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, there is provided a detection apparatus comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the following steps when executing the computer program:
acquiring an electromagnetic wave signal detected by an ultrahigh frequency antenna; wherein, the uhf antenna is the signal detection antenna in the embodiment corresponding to fig. 1;
analyzing and processing the electromagnetic wave signal to obtain an analysis result;
and comparing the characteristics of the analysis result with the characteristics of the standard partial discharge spectrogram, and determining the electromagnetic wave signal as a partial discharge signal according to the comparison result.
In one embodiment, a storage medium is provided having a computer program stored thereon, the computer program when executed by a processor implementing the steps of:
acquiring an electromagnetic wave signal detected by an ultrahigh frequency antenna; wherein, the uhf antenna is the signal detection antenna in the embodiment corresponding to fig. 1;
analyzing and processing the electromagnetic wave signal to obtain an analysis result;
and comparing the characteristics of the analysis result with the characteristics of the standard partial discharge spectrogram, and determining the electromagnetic wave signal as a partial discharge signal according to the comparison result.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A signal detection antenna, comprising: microstrip line, fractal radiator and ground plate;
one end of the microstrip line is connected with the fractal radiator, the other end of the microstrip line is connected with the ground plate, the boundary of the fractal radiator is of a Koch outward fractal curve structure, and the microstrip line, the fractal radiator and the ground plate are all of symmetrical structures.
2. The signal detecting antenna of claim 1, further comprising a dielectric substrate disposed intermediate the fractal radiator and the ground plate.
3. The signal detecting antenna of claim 2, wherein the microstrip line is rectangular, and the boundary of the fractal radiator is formed by iteration of a second-order Koch outward fractal curve.
4. The signal detection antenna of claim 3, wherein the ground plane is rectangular and the dielectric substrate is square;
and preferably, the material of the grounding plate is polytetrafluoroethylene.
5. A method of signal detection, the method comprising:
acquiring an electromagnetic wave signal detected by an ultrahigh frequency antenna; wherein the uhf antenna is the signal detection antenna of any one of claims 1-4 above;
analyzing and processing the electromagnetic wave signal to obtain an analysis result;
and comparing the characteristics of the analysis result with the characteristics of a standard partial discharge spectrogram, and determining the electromagnetic wave signal as a partial discharge signal according to the comparison result.
6. The method of claim 5, wherein comparing the characteristics of the analysis result with the standard partial discharge spectrogram characteristics, and determining the electromagnetic wave signal as a partial discharge signal according to the comparison result comprises:
and if the characteristics of the analysis result are consistent with the characteristics of a standard partial discharge spectrogram, determining the electromagnetic wave signal as the partial discharge signal.
7. A signal detection system, the system comprising: the system comprises an ultrahigh frequency antenna, a transformer and detection equipment;
the ultrahigh frequency antenna is used for detecting an electromagnetic wave signal radiated by the transformer and sending the electromagnetic wave signal to the detection equipment, and the ultrahigh frequency antenna is the signal detection antenna of any one of the claims 1 to 4;
the detection device for performing the method of any one of claims 5-6.
8. A signal detection apparatus, the apparatus comprising:
the electromagnetic wave signal acquisition module is used for acquiring the electromagnetic wave signal detected by the ultrahigh frequency antenna; wherein the uhf antenna is the signal detection antenna described in claims 1-4 above;
the analysis processing module is used for analyzing and processing the electromagnetic wave signals to obtain an analysis result;
and the comparison module is used for comparing the characteristics of the analysis result with the characteristics of a standard partial discharge spectrogram and determining the electromagnetic wave signal as 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 realizes the steps of the method according to any of claims 5-6 when executing the computer program.
10. A storage medium having a computer program stored thereon, the computer program, when being executed by a processor, realizing the steps of the method according to any of the claims 5-6.
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