Power line detection method, device, system and equipment, storage medium and program product

Abstract

The embodiment of the invention provides a power line detection method, device, system and equipment, a storage medium and a program product. The method comprises the following steps: detecting a magnetic field signal and a first ultrasonic signal generated after a detection electric signal transmitted by a transmitting pen passes through a power line; performing spectrum analysis on the magnetic field signal, and determining frequency distribution of the electromagnetic interference signal according to an analysis result; filtering a signal in a frequency band indicated by frequency distribution from the first ultrasonic signal to obtain a second ultrasonic signal; and determining fault information of the power line according to the second ultrasonic signal. The method is used for improving the anti-interference capability of a detection system on electromagnetic influence, so that the technical effect of improving the accuracy of a power line fault detection result is achieved.

Description

Technical Field

[0001] This application relates to the field of power technology, and in particular to a method, apparatus, system, equipment, storage medium, and program product for power line detection. Background Technology

[0002] Power distribution engineering inspection is a crucial part of ensuring the safe operation of the power system, and power line inspection is an important aspect of power distribution engineering inspection.

[0003] Since power lines typically transmit signals in complex electromagnetic environments, they are susceptible to electromagnetic interference when using related technologies to detect them, which can affect the fault detection results.

[0004] Therefore, improving the anti-interference capability of the detection system against electromagnetic influences during power line testing, thereby improving the accuracy of power line fault detection results, has become an urgent problem to be solved. Summary of the Invention

[0005] This application provides a power line detection method, apparatus, system, equipment, storage medium, and program product to solve the above problems.

[0006] In a first aspect, embodiments of this application provide a power line detection method, applied to a receiving pen in a detection system, comprising:

[0007] Receives a magnetic field signal and a first ultrasonic signal; the magnetic field signal and the first ultrasonic signal are generated by the detection signal emitted by the transmitting pen passing through the power line;

[0008] The magnetic field signal is subjected to spectral analysis, and the frequency distribution of the electromagnetic interference signal is determined based on the analysis results; wherein, the electromagnetic interference signal is generated by the external magnetic field environment of the power line; the magnetic field signal and the first ultrasonic signal include the electromagnetic interference signal;

[0009] The first ultrasonic signal is filtered to remove signals within the frequency band indicated by the frequency distribution to obtain the second ultrasonic signal;

[0010] The fault information of the power line is determined based on the second ultrasonic signal.

[0011] In one possible implementation, the detection electrical signal includes an excitation signal in a preset frequency band.

[0012] In one possible implementation, performing spectral analysis on the magnetic field signal and determining the frequency distribution of the electromagnetic interference signal based on the analysis results includes:

[0013] The magnetic field signal in the time domain is transformed to the frequency domain using a short-time Fourier transform to obtain the spectrum of the magnetic field signal.

[0014] Based on the frequency domain characteristics of the electromagnetic interference signal, the frequency distribution corresponding to the electromagnetic interference signal is determined from the spectrum diagram.

[0015] In one possible implementation, determining the fault information of the power line based on the second ultrasonic signal includes:

[0016] The second ultrasonic signal is amplified;

[0017] In response to the amplitude difference of the second ultrasonic signal in two adjacent detection cycles being greater than a preset amplitude threshold, a prompt message is issued; the prompt message indicates that there is partial discharge in the power line.

[0018] In one possible implementation, the method further includes:

[0019] In response to the detection that the frequency band indicated by the frequency distribution at least partially falls within the frequency band of the detection electrical signal, and the intensity of the electromagnetic interference signal is greater than a preset intensity threshold, a command to adjust the frequency band of the detection electrical signal is sent to the transmitter pen via the wireless communication module; wherein, the command includes a target frequency band to be adjusted to, which is used to instruct the transmitter pen to transmit the detection electrical signal within the target frequency band.

[0020] In one possible implementation, the method further includes:

[0021] The frequency band information of the detection electrical signal emitted by the transmitting pen is received, and the frequency band indicated by the frequency band information is displayed on the display screen.

[0022] In one possible implementation, the method further includes:

[0023] The system receives a user's instruction to adjust the detection electrical signal parameters and transmits the frequency band and / or amplitude information indicated by the instruction to the transmitter pen via a wireless communication module.

[0024] Secondly, embodiments of this application provide a power line detection device, comprising a receiving pen disposed in the detection system, including:

[0025] The detection unit is used to receive a magnetic field signal and a first ultrasonic signal; the magnetic field signal and the first ultrasonic signal are generated by the detection signal emitted by the transmitting pen passing through the power line;

[0026] A spectrum analysis unit is used to perform spectrum analysis on the magnetic field signal and determine the frequency distribution of the electromagnetic interference signal based on the analysis results; wherein the electromagnetic interference signal is generated by the external magnetic field environment of the power line; the magnetic field signal and the first ultrasonic signal include the electromagnetic interference signal;

[0027] A filtering unit is used to filter out signals within the frequency band indicated by the frequency distribution from the first ultrasonic signal to obtain a second ultrasonic signal;

[0028] The fault determination unit is used to determine the fault information of the power line based on the second ultrasonic signal.

[0029] Thirdly, embodiments of this application provide a power line detection system, including a transmitter and a receiver.

[0030] The transmitter pen transmits a detection electrical signal of a preset frequency band at the first end of the power line according to the transmission command, which serves as the excitation signal for the power line.

[0031] The receiving pen detects a magnetic field signal and a first ultrasonic signal; the magnetic field signal and the first ultrasonic signal are generated after the detection electrical signal emitted by the transmitting pen passes through the power line; the magnetic field signal is subjected to spectrum analysis, and the frequency distribution of the electromagnetic interference signal is determined according to the analysis results; the first ultrasonic signal is filtered to remove the signal in the frequency band indicated by the frequency distribution to obtain a second ultrasonic signal; the fault information of the power line is determined according to the second ultrasonic signal.

[0032] In one possible implementation, the transmitting pen and the receiving pen are provided with a composite electromagnetic shielding structure consisting of at least two electromagnetic shielding layers.

[0033] Fourthly, embodiments of this application provide a power line testing device, including: a memory and a processor;

[0034] The memory stores computer-executed instructions;

[0035] The processor executes computer execution instructions stored in the memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect as described above.

[0036] Fifthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible implementations of the first aspect.

[0037] In a sixth aspect, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the first aspect and / or various possible implementations of the first aspect.

[0038] The power line detection method, apparatus, system, equipment, storage medium, and program product provided in this application embodiment receive the detection electrical signal emitted by the transmitter pen and the magnetic field signal and ultrasonic signal generated by the power line through the power line; perform spectrum analysis on the magnetic field signal to determine the frequency distribution of electromagnetic interference signals; filter out signals within the frequency band indicated by the frequency distribution from the ultrasonic signal; and analyze the filtered ultrasonic signal to obtain fault information of the power line. The final analysis signal filters out electromagnetic interference-related signals, improving the detection system's anti-interference capability against electromagnetic influences, thereby improving the accuracy of power line fault detection results. Attached Figure Description

[0039] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0040] Figure 1 A schematic flowchart of the power line detection method provided in the embodiments of this application;

[0041] Figure 2 This is a schematic diagram of the structure of the transmitting pen or receiving pen provided in the embodiments of this application;

[0042] Figure 3 This is a schematic diagram of the structure of the power line detection device provided in the embodiments of this application;

[0043] Figure 4 This is a schematic diagram of the power line detection system provided in an embodiment of this application;

[0044] Figure 5 This is a schematic diagram of the structure of the power line testing equipment provided in the embodiments of this application.

[0045] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0046] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0047] Power distribution engineering inspection is a crucial aspect of ensuring the safe operation of power systems, and power line inspection is an important part of power distribution engineering inspection. Power line inspection involves examining various aspects of the power lines, including wiring, signal transmission, and damage, to identify potential faults and facilitate timely maintenance of the power system.

[0048] For large substations, power lines are typically long and transmit signals in complex electromagnetic environments. Related technologies either connect the power lines with wires for inspection using testing equipment, or incorporate wireless communication into the testing equipment. However, connecting power lines with wires is cumbersome due to the limited length of the wires, especially for long power lines where repositioning is difficult. Wireless communication is susceptible to electromagnetic interference, which can affect fault detection results. Furthermore, in large substations, the operating environment of power lines often contains strong magnetic fields, which significantly impact signal transmission within the power lines.

[0049] Based on the above scenarios, it is clear that using existing technologies to detect faults in power lines, especially those in large substations, presents technical problems such as cumbersome operation and low accuracy of fault detection results due to magnetic field interference.

[0050] The power line detection method provided in this application receives the detection electrical signal emitted by the transmitter pen and the magnetic field signal and ultrasonic signal generated by the power line through the power line via the receiver pen; performs spectrum analysis on the magnetic field signal to determine the frequency distribution of electromagnetic interference signals; filters out signals within the frequency band indicated by the frequency distribution from the ultrasonic signal; and analyzes the filtered ultrasonic signal to obtain fault information of the power line. The final analysis signal filters out electromagnetic interference-related signals, improving the detection system's anti-interference capability against electromagnetic influences, thereby improving the accuracy of power line fault detection results.

[0051] The technical solution of this application and how it solves the above-mentioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0052] Figure 1 This is a flowchart illustrating the power line detection method provided in the embodiments of this application, using a receiving pen in the detection system, such as... Figure 1 As shown, the method includes:

[0053] S101, Receive magnetic field signal and first ultrasonic signal; the magnetic field signal and the first ultrasonic signal are generated by the detection signal emitted by the transmitting pen after passing through the power line.

[0054] It should be noted that the detection electrical signal emitted by the transmitter pen can be a detection signal that lasts for a period of time. This period of time can be divided into multiple detection cycles for data analysis.

[0055] The receiving pen can detect magnetic field signals through a magnetic field sensor and ultrasonic signals through an ultrasonic sensor.

[0056] In some specific embodiments, the detected electrical signal includes an excitation signal in a preset frequency band.

[0057] For example, the transmitter pen can use its built-in signal generator to send an excitation signal of a specific frequency band to one end of a power line to stimulate partial discharge within the power line, providing a basis for subsequent detection and analysis.

[0058] S102. Perform spectrum analysis on the magnetic field signal and determine the frequency distribution of the electromagnetic interference signal based on the analysis results; wherein, the electromagnetic interference signal is generated by the external magnetic field environment of the power line; the magnetic field signal and the first ultrasonic signal include the electromagnetic interference signal.

[0059] Specifically, in some implementations of these embodiments, step S102 includes the following sub-steps:

[0060] First, the magnetic field signal in the time domain is transformed to the frequency domain using a short-time Fourier transform to obtain the spectrum of the magnetic field signal.

[0061] Second, based on the frequency domain characteristics of the electromagnetic interference signal, determine the frequency distribution corresponding to the electromagnetic interference signal from the spectrum diagram.

[0062] For example, a short-time Fourier transform can be used to transform magnetic field signals over multiple time periods into signal representations at various frequencies, and a spectrum can be plotted based on the signal representations at each frequency. The plotted spectrum can then be used to analyze the energy of the signal. Based on the abnormal energy data characteristics of the electromagnetic interference signal at different frequencies, the frequency distribution corresponding to the electromagnetic interference signal can be determined.

[0063] It can obtain the frequency domain characteristics of different types of electromagnetic interference signals in advance. For example, power frequency interference from transformers and other sources has the following frequency domain characteristics: frequency distribution at 50Hz or 60Hz; power supply noise from switching power supplies and other sources has the following frequency domain characteristics: high-frequency spikes; and electrostatic discharge from human body discharge and equipment friction has the following frequency domain characteristics: broadband pulses.

[0064] In these embodiments, the magnetic field signal is transformed, and a spectrum diagram of the magnetic field signal is plotted based on the transformation result. Based on the frequency domain characteristics of the electromagnetic interference signal, the frequency distribution of the electromagnetic interference is determined from the spectrum diagram. This frequency distribution of the electromagnetic interference can be used to filter out interference signals during subsequent analysis of the ultrasonic signal, thereby reducing the influence of the magnetic field on the detection results.

[0065] S103. Filter out the signals within the frequency band indicated by the frequency distribution from the first ultrasonic signal to obtain the second ultrasonic signal.

[0066] For example, a bandpass filter bank can be used to filter the first ultrasonic signal based on the least mean square algorithm to filter out interference signals in the frequency band indicated by the frequency distribution and improve the signal-to-noise ratio of the signal.

[0067] S104. Determine the fault information of the power line based on the second ultrasonic signal.

[0068] Specifically, in some implementations of these embodiments, step S104 above includes the following sub-steps:

[0069] First, the second ultrasonic signal is amplified.

[0070] Second, in response to the amplitude difference of the second ultrasonic signal in two adjacent detection cycles after amplification being greater than a preset amplitude threshold, a prompt message is issued, indicating that there is partial discharge in the power line.

[0071] For example, a differential amplifier circuit can be used to amplify the second ultrasonic signal and calculate the amplitude of the amplified second ultrasonic signal in real time within any detection period. The difference between the amplitudes in any two adjacent detection periods is compared. If the difference is greater than a preset amplitude threshold, a prompt message is issued. The preset amplitude threshold can be an amplitude threshold determined based on historical experience.

[0072] In these embodiments, the second ultrasonic signal is amplified, the amplitude of each of any two adjacent detection cycles is detected, and the presence of partial discharge in the power line is determined based on the comparison between the amplitude difference and the preset amplitude. The amplified signal is used to obtain analytical data that is easier to analyze, so that the detection conclusion can be drawn accurately and quickly by comparing the preset threshold with the threshold difference.

[0073] In some implementations of these embodiments, the method further includes:

[0074] In response to the detection that the frequency band indicated by the frequency distribution at least partially falls into the frequency band of the detection electrical signal, and the intensity of the electromagnetic interference signal is greater than a preset intensity threshold, a command to adjust the frequency band of the detection electrical signal is sent to the transmitter pen through the wireless communication module. The command includes the target frequency band to be adjusted to, which is used to instruct the transmitter pen to transmit the detection electrical signal within the target frequency band.

[0075] It should be noted that the preset strength threshold and target frequency band can be strength thresholds derived from historical experience. Among them, the target frequency band has higher anti-interference capabilities.

[0076] Because part of the frequency band indicated by the frequency distribution falls into the frequency band of the detected electrical signal, the signals overlap, and the overlapping signals interfere with each other.

[0077] For example, the intensity of electromagnetic interference can be obtained by data analysis of the spectrum of the magnetic field signal.

[0078] In these implementations, when the detected electromagnetic interference intensity is greater than a preset intensity threshold, a command is sent to instruct the transmitter to switch to a frequency band with higher anti-interference capability for signal transmission, thereby reducing the influence of interference signals and improving the accuracy of detection results.

[0079] In some implementations of these embodiments, the method further includes:

[0080] It receives the frequency band information of the detection electrical signal emitted by the transmitter pen and displays the frequency band indicated by the frequency band information on the display screen.

[0081] In these embodiments, the receiving pen receives the frequency band information of the detection electrical signal from the transmitting pen, which can be used to synchronously modify the operating frequency band of the receiving pen. At the same time, data analysis is performed based on the frequency band information displayed on the screen to ensure smooth signal transmission and reception.

[0082] In some implementations of these embodiments, the method further includes:

[0083] The system receives the user's instruction to adjust the detection electrical signal parameters and transmits the frequency band and / or amplitude information indicated by the instruction to the transmitter pen via the wireless communication module.

[0084] For example, the receiving pen receives a user's instruction to adjust the detection electrical signal parameters, which includes a target operating frequency band and amplitude information. The receiving pen switches to the target operating frequency band, and the transmitting pen, upon receiving the instruction, synchronously switches to the target operating frequency band and transmits a signal according to the amplitude information.

[0085] In these implementations, the method of adjusting the detection electrical signal parameters by user input commands is used to adapt to the detection of power lines in more complex scenarios, thereby improving the accuracy of the detection results.

[0086] The power line detection method provided in this application embodiment receives the detection electrical signal emitted by the transmitter pen and the magnetic field signal and ultrasonic signal generated by the power line through the power line via the receiver pen; performs spectrum analysis on the magnetic field signal to determine the frequency distribution of electromagnetic interference signals; filters out signals within the frequency band indicated by the frequency distribution from the ultrasonic signal; and analyzes the filtered ultrasonic signal to obtain fault information of the power line. The final analysis signal filters out electromagnetic interference-related signals, improving the detection system's anti-interference capability against electromagnetic influences, thereby improving the accuracy of power line fault detection results.

[0087] Figure 2 The schematic diagram of the transmitting pen or receiving pen provided in the embodiments of this application is shown in the figure. The transmitting pen and the receiving pen can have the same structure, including a switching button 202, a touch display screen 204, a working head 201, and a housing 203. The housing 203 includes a wireless communication component, a data storage and processing component, a screwdriver bit switching component, and an excitation signal generator. The transmitting pen can be switched to a receiving pen using the switching button 202 of the transmitting pen, and the receiving pen can be switched to a transmitting pen using the switching button 202 of the receiving pen.

[0088] The touch display 204 supports gesture touch and data display functions. For example, the touch display 204 may include three functional areas: the first functional area can be used to display the current working status, which can be either the receiving pen status or the transmitting pen status; the second functional area can be used for parameter adjustment, whereby the user can adjust the parameters of the detected electrical signal by clicking on the selectable frequency band and / or amplitude displayed on the screen; the third functional area can be a shortcut operation area, where shortcut operations can be used to switch the working head 201.

[0089] The working head 201 can be a detachable component. For example, a detachable component can simultaneously house a magnetic field sensor and an ultrasonic sensor. The magnetic field sensor can be used to detect magnetic field signals at one end of a power line; the ultrasonic sensor can be used to detect ultrasonic signals at one end of the power line.

[0090] For example, a detachable component may include the head of an excitation signal generator.

[0091] For example, a detachable component may include a screwdriver bit.

[0092] The internal component switching command can be sent by clicking the shortcut operation area of ​​the third function area of ​​the touch display screen 204 to switch the internal component connected to the detachable component.

[0093] For example, the working head 201 can be switched to a detachable component including a magnetic field sensor and an ultrasonic sensor by switching instructions in the quick operation area. The internal wireless communication component, data storage and processing component are automatically connected to the detachable component through wiring to detect magnetic field signals and ultrasonic signals.

[0094] For example, the working head 201 can be switched to a detachable component including an excitation signal generator head via a switching command in the quick operation area. The internal wireless communication component, data storage and processing component, and excitation signal generator are automatically connected to the detachable component via wiring to send excitation signals.

[0095] For example, the internal component can be connected to a detachable component including screwdriver heads via a quick operation area switching command. The internal screwdriver head switching component is physically connected to the detachable component through a physical connection structure. The core components of the screwdriver head switching component are a drive motor and a shaft control structure. The motor's output shaft is connected to a rotating shaft via a gear set. The rotation of the rotating shaft drives multiple screwdriver heads in the built-in compartment connected to the rotating shaft to move along a preset track. The multiple screwdriver heads in the built-in compartment are arranged in a ring, and each screwdriver head has a different specification. The screwdriver head switching component also includes a slot with a spring device at the bottom, which is used to connect to the external working head 201. The switching command includes a target specification screwdriver head, used to control the rotation of the rotating shaft, rotating the target specification screwdriver head to the slot, and installing the target specification screwdriver head into the slot, so that the target specification screwdriver head becomes a sub-component of the detachable component. The target specification screwdriver head can be used to adjust the tightness of screws on power lines for power line inspection.

[0096] In some specific implementations, the transmitting pen and / or receiving pen are provided with a composite electromagnetic shielding structure consisting of at least two electromagnetic shielding layers.

[0097] For example, the housing 203 may be a metallized injection-molded housing, with a first electromagnetic shielding layer made of nanocrystalline alloy foil and a second electromagnetic shielding layer made of conductive polymer disposed therein. The housing, the first electromagnetic shielding layer, and the second electromagnetic shielding layer together form a Faraday cage structure to achieve the effect of electromagnetic shielding.

[0098] Figure 3 This is a schematic diagram of the structure of the power line detection device provided in the embodiments of this application, as shown below. Figure 3 As shown, the power line testing device 30 provided in this embodiment includes:

[0099] The detection unit 301 is used to receive a magnetic field signal and a first ultrasonic signal; the magnetic field signal and the first ultrasonic signal are generated by the detection signal emitted by the transmitting pen passing through the power line;

[0100] The spectrum analysis unit 302 is used to perform spectrum analysis on the magnetic field signal and determine the frequency distribution of the electromagnetic interference signal based on the analysis results; wherein, the electromagnetic interference signal is generated by the external magnetic field environment of the power line; the magnetic field signal and the first ultrasonic signal include the electromagnetic interference signal;

[0101] Filtering unit 303 is used to filter out signals within the frequency band indicated by the frequency distribution of the first ultrasonic signal to obtain the second ultrasonic signal;

[0102] The fault determination unit 304 is used to determine the fault information of the power line based on the second ultrasonic signal.

[0103] In some specific embodiments, the detected electrical signal includes an excitation signal in a preset frequency band.

[0104] In some implementations of these embodiments, the spectrum analysis unit 302 is also used to transform the time-domain magnetic field signal to the frequency domain using a short-time Fourier transform to obtain a spectrum of the magnetic field signal.

[0105] Based on the frequency domain characteristics of the electromagnetic interference signal, the frequency distribution corresponding to the electromagnetic interference signal is determined from the spectrum diagram.

[0106] In some implementations of these embodiments, the fault determination unit 304 is also configured to amplify the second ultrasonic signal;

[0107] In response to the amplitude difference of the second ultrasonic signal in two adjacent detection cycles being greater than a preset amplitude threshold, a prompt message is issued, indicating that there is partial discharge in the power line.

[0108] In some embodiments of these examples, the power line detection device 30 further includes an adjustment module for sending an instruction to the transmitter pen via a wireless communication module to adjust the frequency band of the detection electrical signal in response to the detection of a frequency band at least partially falling into the frequency band of the detection electrical signal and the intensity of the electromagnetic interference signal being greater than a preset intensity threshold. The instruction includes a target frequency band to be adjusted to, which instructs the transmitter pen to transmit the detection electrical signal within the target frequency band.

[0109] In some embodiments of these examples, the power line detection device 30 further includes a display module for receiving frequency band information of the detection electrical signal emitted by the transmitter pen and displaying the frequency band indicated by the frequency band information on the display screen.

[0110] In some implementations of these embodiments, the adjustment module is also configured to receive a user's adjustment command for the detection electrical signal parameters, and transmit the frequency band and / or amplitude information indicated by the adjustment command to the transmitter pen via the wireless communication module.

[0111] The power line detection device provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0112] Figure 4 This is a schematic diagram of the power line detection system provided in the embodiments of this application, as shown below. Figure 4 As shown, the power line detection system includes a transmitter 401 and a receiver 403.

[0113] The power line detection system also includes a power line 402. The transmitter 401 transmits a detection electrical signal of a preset frequency band at the first end of the power line 402 according to the transmission command, as the excitation signal of the power line 402.

[0114] The receiving pen 403 detects a magnetic field signal and a first ultrasonic signal; the magnetic field signal and the first ultrasonic signal are generated after the detection electrical signal emitted by the transmitting pen 401 passes through the power line 402; the magnetic field signal is subjected to spectrum analysis, and the frequency distribution of the electromagnetic interference signal is determined based on the analysis results; the first ultrasonic signal is filtered to remove signals within the frequency band indicated by the frequency distribution to obtain a second ultrasonic signal; the fault information of the power line is determined based on the second ultrasonic signal.

[0115] In some specific embodiments, the transmitting pen 401 and the receiving pen 403 communicate wirelessly using a wireless communication component. For example, the wireless communication component supports dual-pen cooperative communication, with the transmitting pen 401 and the receiving pen 403 occupying frequency bands in a time-division multiplexing manner. The transmitting pen transmits signals in odd-numbered time slots, and the receiving pen detects electrical signals in even-numbered time slots.

[0116] To ensure stable data transmission in complex electromagnetic environments, wireless communication components can dynamically adjust their operating frequency band based on the intensity of electromagnetic interference in the current environment. For example, in areas with strong interference, such as large substations, wireless communication components will select low-frequency bands for data transmission to reduce signal attenuation and interference.

[0117] The power line detection system provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0118] Figure 5 This is a schematic diagram of the structure of the power line testing equipment provided in an embodiment of this application. Figure 5As shown, the power line detection device 50 provided in this embodiment includes at least one processor 501 and a memory 502. Optionally, the device 50 also includes a communication component 503. The processor 501, memory 502, and communication component 503 are connected via a bus 504.

[0119] In a specific implementation, at least one processor 501 executes computer execution instructions stored in memory 502, causing at least one processor 501 to perform the above-described method.

[0120] The specific implementation process of processor 501 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0121] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0122] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0123] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0124] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0125] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.

[0126] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0127] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0128] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0129] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0130] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0131] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0132] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0133] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A power line detection method, applied to a receiving pen in a detection system, characterized in that, include: Receives a magnetic field signal and a first ultrasonic signal; the magnetic field signal and the first ultrasonic signal are generated by the detection signal emitted by the transmitting pen passing through the power line; The magnetic field signal is subjected to spectral analysis, and the frequency distribution of the electromagnetic interference signal is determined based on the analysis results; wherein, the electromagnetic interference signal is generated by the external magnetic field environment of the power line; the magnetic field signal and the first ultrasonic signal include the electromagnetic interference signal; The first ultrasonic signal is filtered to remove signals within the frequency band indicated by the frequency distribution to obtain the second ultrasonic signal; The fault information of the power line is determined based on the second ultrasonic signal.

2. The method according to claim 1, characterized in that, The detection electrical signal includes an excitation signal in a preset frequency band.

3. The method according to claim 1, characterized in that, The step of performing spectral analysis on the magnetic field signal and determining the frequency distribution of the electromagnetic interference signal based on the analysis results includes: The magnetic field signal in the time domain is transformed to the frequency domain using a short-time Fourier transform to obtain the spectrum of the magnetic field signal. Based on the frequency domain characteristics of the electromagnetic interference signal, the frequency distribution corresponding to the electromagnetic interference signal is determined from the spectrum diagram.

4. The method according to claim 1, characterized in that, The step of determining the fault information of the power line based on the second ultrasonic signal includes: The second ultrasonic signal is amplified; In response to the amplitude difference of the second ultrasonic signal in two adjacent detection cycles being greater than a preset amplitude threshold, a prompt message is issued; the prompt message indicates that there is partial discharge in the power line.

5. The method according to any one of claims 1-4, characterized in that, The method further includes: In response to the detection that the frequency band indicated by the frequency distribution at least partially falls within the frequency band of the detection electrical signal, and the intensity of the electromagnetic interference signal is greater than a preset intensity threshold, a command to adjust the frequency band of the detection electrical signal is sent to the transmitter pen via the wireless communication module; wherein, the command includes a target frequency band to be adjusted to, which is used to instruct the transmitter pen to transmit the detection electrical signal within the target frequency band.

6. The method according to any one of claims 1-4, characterized in that, The method further includes: The frequency band information of the detection electrical signal emitted by the transmitting pen is received, and the frequency band indicated by the frequency band information is displayed on the display screen.

7. The method according to any one of claims 1-4, characterized in that, The method further includes: The system receives a user's instruction to adjust the detection electrical signal parameters and transmits the frequency band and / or amplitude information indicated by the instruction to the transmitter pen via a wireless communication module.

8. A power line detection device, comprising a receiving pen installed in a detection system, characterized in that, include: The detection unit is used to receive a magnetic field signal and a first ultrasonic signal; the magnetic field signal and the first ultrasonic signal are generated by the detection signal emitted by the transmitting pen passing through the power line; A spectrum analysis unit is used to perform spectrum analysis on the magnetic field signal and determine the frequency distribution of the electromagnetic interference signal based on the analysis results; wherein the electromagnetic interference signal is generated by the external magnetic field environment of the power line; the magnetic field signal and the first ultrasonic signal include the electromagnetic interference signal; A filtering unit is used to filter out signals within the frequency band indicated by the frequency distribution from the first ultrasonic signal to obtain a second ultrasonic signal; The fault determination unit is used to determine the fault information of the power line based on the second ultrasonic signal.

9. A power line detection system, characterized in that, Includes a transmitter pen and a receiver pen. The transmitter pen transmits a detection electrical signal of a preset frequency band at the first end of the power line according to the transmission command, which serves as the excitation signal for the power line. The receiving pen detects a magnetic field signal and a first ultrasonic signal; the magnetic field signal and the first ultrasonic signal are generated after the detection electrical signal emitted by the transmitting pen passes through the power line; the magnetic field signal is subjected to spectrum analysis, and the frequency distribution of the electromagnetic interference signal is determined according to the analysis results; the first ultrasonic signal is filtered to remove the signal in the frequency band indicated by the frequency distribution to obtain a second ultrasonic signal; the fault information of the power line is determined according to the second ultrasonic signal.

10. The system according to claim 9, characterized in that, The transmitting pen and the receiving pen are provided with a composite electromagnetic shielding structure consisting of at least two electromagnetic shielding layers.

11. A power line testing device, characterized in that, include: Memory, processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in any one of claims 1-7.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-7.

13. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method described in any one of claims 1-7.

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