CN115980529A - Partial discharge acoustic imaging detection positioning method, system and computer storage medium - Google Patents
Partial discharge acoustic imaging detection positioning method, system and computer storage medium Download PDFInfo
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Abstract
The invention discloses a method and a system for detecting and positioning partial discharge acoustic imaging and a computer storage medium, wherein the method comprises the following steps: step 1, starting an acoustic imaging device, positioning a field sound source, and acquiring a first sound cloud picture; step 2, setting a sound amplitude value and a frequency threshold value, and obtaining a second sound cloud picture, wherein the second sound cloud picture displays the size of a local discharge source and the position of the local discharge source; and 3, further detecting the partial discharge signal by using other sensors. The invention forms a visual sound cloud picture by acoustically imaging the field sound of the power equipment, can quickly position the position of the partial discharge defect in the environment of a complex power facility, further judges the type and specific position of the defect by using other detection equipment, can detect the partial discharge position in a safe distance, and improves the safety of field work and the accuracy of the partial discharge detection.
Description
Technical Field
The invention relates to the technical field of local discharge acoustic imaging detection, in particular to a local discharge acoustic imaging detection positioning method and system and a computer storage medium.
Background
At present, the partial discharge problem caused by the defects of power equipment has detection types such as high-frequency detection, ultrahigh-frequency detection, ultrasonic detection and the like, different detection types correspond to different detection software to realize the effect of visual analysis and diagnosis, and PRPD and PRPS maps are conventional realization modes.
In fact, once a power device has a fault defect, in addition to the above expressions, the power device is often accompanied by sound waves in a certain frequency range. Furthermore, due to the danger of high voltage in some electrical equipment, inspection personnel also need to detect at a distance. At this time, the localization of the sound source is very difficult. Therefore, a software capable of accurately locating the sound source is needed to perform the most preliminary detection and location of the partial discharge, and then perform other types of detection.
Most partial discharge detection equipment on the market at the present stage lacks an acoustic related detection technology, and judgment is performed only through experience or feeling of detection personnel in a field detection process, so that the partial discharge detection equipment is often weak in a complex environment, and therefore detection imaging of partial discharge sound is urgently needed.
Disclosure of Invention
The invention aims to provide a method, a system and a computer storage medium for detecting and positioning partial discharge acoustic imaging, which are used for solving the problem that the position of a partial discharge source cannot be judged on the site of power equipment according to sound.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a local discharge acoustic imaging detection positioning method,
step 3, further detecting partial discharge signals by using other sensors;
the first sound cloud comprises: the sound source distribution diagram is used for displaying a live video image and a sound source spatial position in real time; a sound source PRPD map for acquiring a sound amplitude and phase distribution relation of the sound source distribution map, and synchronously displaying in a PRPD map form; the sound source amplitude map is used for displaying the sound source amplitude distribution in the live video image and the change of the sound source amplitude distribution along with time; and the sound source time domain map is used for displaying the frequency distribution of a sound source in a live video image and the change along with time, and the sound source frequency threshold value can be defined by screening and is used for displaying the position of a local discharge source of the sound source distribution map.
Preferably, in the step 1, a field sound source is positioned, a matrix microphone array is used, original sound is collected, data analysis processing is performed through a signal processing algorithm, a visual sound color high-speed line video image is formed, and sound source distribution is displayed.
Preferably, in step 3, after the location of the partial discharge defect of the electric power facility is located by using the acoustic imaging device, a high frequency sensor, an ultrahigh frequency sensor or an ultrasonic sensor is used to further acquire a partial discharge signal and diagnose.
Preferably, a plurality of sound sources are displayed on the sound source distribution diagram, a first sound source is selected, the PRPD diagram of the sound source displays the PRPD diagram of the first sound source in real time, and the amplitude value diagram and the sound source time domain diagram synchronously display the amplitude value and the frequency diagram change of the first sound source.
Preferably, the sound source PRPD map is a single frame of sampling data in each period with the 360-degree phase average distribution, and the sampling data are sound wave energy, drawn in a single point and can be superposed; the X axis is a phase angle, the Y axis is a sound source amplitude, and the colors of different depths in the sound source PRPD map represent the distribution density of the sound wave energy point cloud.
Preferably, the acoustic imaging apparatus includes: the system comprises a handheld acoustic imaging detector, a connecting wire, a mobile power supply and an intelligent terminal; the handheld acoustic imaging detector is connected with the mobile power supply through the connecting line, and the intelligent terminal is connected with the handheld acoustic imaging detector;
a network module is arranged in the handheld acoustic imaging detector, the intelligent terminal is connected to the network module and displays the first sound cloud picture in real time, and sound positioning of a local discharge source is achieved.
Preferably, the communication process between the handheld acoustic imaging detector and the intelligent terminal includes:
establishing communication connection between the handheld acoustic imaging detector and the intelligent terminal;
the handheld acoustic imaging detector receives a service command from the intelligent terminal and starts to collect sound source data, wherein the service command comprises: starting, ending and collecting data frames;
the intelligent terminal opens a data receiving interface and receives sound source data of the handheld acoustic imaging detector;
the intelligent terminal receives the sound source data, analyzes and processes the sound source data, and displays a first sound cloud picture of the sound source data in real time;
the intelligent terminal sends a stop command to the handheld acoustic imaging detector, and the handheld acoustic imaging detector stops transmitting sound source data;
and disconnecting the communication connection between the handheld acoustic imaging detector and the intelligent terminal.
Preferably, the intelligent terminal is configured to receive sound source data and display a first sound cloud, and further includes: the refreshing module refreshes the live video and the first sound cloud picture in real time; the storage module is used for storing the acquired sound source data; and the video recording module is used for recording the real-time live video and the first sound cloud picture.
A partial discharge acoustic imaging detection positioning system, comprising:
the real-time image and sound source synthesis module is used for displaying real-time field video images and displaying the size and the spatial position of a sound source in the video images;
the threshold control module is used for defining and screening a sound amplitude threshold, and displaying and analyzing a local discharge source;
the sound source PRPD module is used for displaying the size of the field sound at different phase positions in a periodic form so as to facilitate subsequent analysis and positioning;
and the time-frequency map and frequency domain selection module is used for displaying the sound source on the time-frequency map, screening frequency for observation and analyzing the sound source image.
A computer readable storage medium having stored thereon at least one program which is loaded and executed by a processor to implement the localization method of partial discharge acoustic imaging detection as claimed in any one of claims 1 to 8.
The invention forms a visual sound cloud picture by acoustically imaging the field sound of the power equipment, can quickly position the position of the partial discharge defect in the environment of a complex power facility, further judges the type and specific position of the defect by using other detection equipment, can detect the partial discharge position in a safe distance, and improves the safety of field work and the accuracy of the partial discharge detection.
Drawings
FIG. 1 is a schematic flow chart of a local discharge acoustic imaging detection positioning method according to the present invention;
FIG. 2 is a schematic view of a first sound cloud structure according to the present invention;
FIG. 3 is a schematic diagram illustrating a communication flow between the handheld acoustic imaging detector and an intelligent terminal according to the present invention;
FIG. 4 is a schematic structural diagram of a partial discharge acoustic imaging detection positioning system according to the present invention;
FIG. 5 is a schematic diagram of an in-situ test according to an embodiment of the present invention;
FIG. 6 is a schematic view of a first sound cloud of the present invention;
fig. 7 is a schematic diagram of a second sound cloud according to the present invention.
Detailed Description
The technical solution of the present invention is further described below with reference to the following embodiments and the accompanying drawings.
Example 1
The embodiment provides a local discharge acoustic imaging detection positioning method,
step 3, determining the position of a partial discharge source, judging the size and the danger of a signal, and further detecting the partial discharge signal by using other sensors after safety is confirmed;
the first sound cloud includes: the system comprises a sound source distribution diagram, a local discharge source and a control system, wherein the sound source distribution diagram is used for displaying a field video image and the spatial position of a sound source in real time, a plurality of sound sources can be displayed on the video image, the minimum amplitude and frequency of a received sound source signal are automatically set on an intelligent terminal, the filtration and screening of the sound sources are realized, the specific position of the local discharge source is positioned, and the size is judged;
the sound source PRPD map is used for acquiring all sound amplitude and phase distribution relations of the sound source distribution map and synchronously displaying the sound amplitude and phase distribution relations in a PRPD map mode; in the presence of multiple sources and other noise, it is often desirable to filter the noise to further determine the location of the sources of partial discharge.
The sound source amplitude map is used for displaying the sound source amplitude distribution in a live video image and the change along with time, and the threshold value of the sound source amplitude can be automatically adjusted; the method comprises the steps of setting a first sound source amplitude threshold value, enabling the sound amplitude of a local discharge source to be above the first sound source amplitude threshold value, filtering a sound source lower than the first sound source amplitude threshold value, eliminating field interference noise, displaying a sound source PRPD map on the first sound source amplitude threshold value correspondingly, displaying the local discharge source map in the sound source amplitude map, displaying a sound source larger than the first sound source amplitude threshold value in a sound source distribution diagram, accurately positioning the position of a local discharge source in the sound source distribution diagram, and automatically setting the first sound source amplitude threshold value according to the field noise condition.
The sound source time domain map is used for displaying the frequency distribution of a sound source in a field video image and the change along with time, and a sound source frequency threshold value can be screened and defined and is used for displaying the position of a partial discharge source of a sound source distribution map; when a plurality of field sound sources exist and are in different frequency bands, as shown in the figure, the frequency range is 25.4KHz-27.8KHz, the sound sources in the frequency range are screened, and the PRPD map and the sound source amplitude map synchronously display the relation between the PRPD map and the amplitude time in the corresponding frequency range, so that whether the sound sources are caused by partial discharge or not is judged.
In a further implementation manner of this embodiment, in step 1, a field sound source is located, a matrix microphone array is used to collect original sound and obtain a sound field distribution cloud map through a beam algorithm, data analysis processing is performed, a visible light video image collected by a camera of an acoustic imaging device is synchronously recorded, and the sound field distribution cloud map and the visible light video image are superimposed through geometric registration with the visible light video image as a background to form a visual sound color high-line video image, so that spatial position, PRPD map, intensity and spectral features of the sound source are visually displayed.
In a further implementation manner of this embodiment, in step 3, after the acoustic imaging device is used to locate the partial discharge defect position of the electric power facility, the high-frequency sensor, the ultrahigh-frequency sensor, or the ultrasonic sensor is used to collect the partial discharge signal in a short distance and diagnose.
In a further implementation manner of this embodiment, a plurality of sound sources are displayed on the sound source distribution diagram, a first sound source is selected on a screen of the intelligent terminal through a touch screen, other sound sources are filtered, a PRPD of the first sound source is displayed in real time by a PRPD of the sound source, and the amplitude and frequency spectrum changes of the first sound source are synchronously displayed by a sound source amplitude map and a sound source time domain map, so that specific analysis on specific sound sources is realized, and whether the sound is sound emitted by a local discharge source is further determined.
In a further implementation manner of this embodiment, a sound source PRPD map is taken for 50 periods of 1 second, and single-frame sampling data is obtained in each period with evenly distributed 360-degree phases, and the sampling data is sound wave energy and can be drawn in a single point and overlapped; the X axis is a phase angle, the Y axis is a sound source amplitude, and colors of different depths in a PRPD map of the sound source present the distribution density of the acoustic energy point cloud.
In a further embodiment of this embodiment, an acoustic imaging apparatus comprises: the system comprises a handheld acoustic imaging detector, a connecting line, a mobile power supply and an intelligent terminal; the mobile power supply is connected with the handheld acoustic imaging detector through a connecting line, the mobile power supply and the intelligent terminal are turned on, the handheld acoustic imaging detector starts to work, the intelligent terminal is connected with a network module of the handheld acoustic imaging detector through software, and the handheld acoustic imaging detector is aligned to field power equipment, so that a real-time video image and a first sound cloud picture can be captured on the intelligent terminal;
a network module is arranged in the handheld acoustic imaging detector, the network module is provided with a WIFI hotspot and is connected with a mobile power supply, and an intelligent terminal is connected to the network module through Smart PD software and can be connected with the handheld acoustic imaging detector to display a first sound cloud picture in real time, so that sound positioning of a local discharge source is realized.
In a further embodiment of this embodiment, the communication process between the handheld acoustic imaging detector and the intelligent terminal includes:
s101, establishing a TCP link, and establishing a communication connection between the handheld acoustic imaging detector and an intelligent terminal;
s102, acquiring the Cmd type, receiving a service command from the intelligent terminal by the handheld acoustic imaging detector, and starting to acquire sound source data, wherein the service command comprises: starting, ending and collecting data frames;
s103, executing a START command, opening a data receiving interface by the intelligent terminal, and receiving sound source data of the handheld acoustic imaging detector;
s104, acquiring and analyzing the data, receiving the sound source data by the intelligent terminal, analyzing and processing the sound source data, and displaying a first sound cloud picture of the sound source data in real time;
s105, executing the STOP command, sending a STOP command to the handheld acoustic imaging detector by the intelligent terminal, and stopping transmitting sound source data by the handheld acoustic imaging detector;
and S106, disconnecting the TCP link and disconnecting the communication connection between the handheld acoustic imaging detector and the intelligent terminal.
In a further embodiment of this embodiment, the intelligent terminal is configured to receive sound source data and display the first sound cloud, and further includes: the refreshing module refreshes the live video and the first sound cloud picture in real time; the storage module is used for storing the acquired sound source data; the video recording module is used for shooting live videos in real time through a built-in camera of the handheld acoustic imaging detector, the live videos and the first sound cloud pictures can be recorded through the video recording module, the live conditions are recorded, the live videos and the first sound cloud pictures are uploaded to the cloud end, and other people can conveniently conduct auxiliary diagnosis.
Example 2
The embodiment provides a partial discharge acoustic imaging detection positioning system, including:
the real-time image and sound source synthesis module is used for displaying real-time field video images and displaying the size and the spatial position of a sound source in the video images;
the threshold control module is used for defining and screening a sound amplitude threshold, filtering field noise, and displaying and analyzing a local discharge source;
the sound source PRPD module is used for displaying the size of the field sound at different phase positions in a periodic mode so as to facilitate subsequent analysis and positioning;
and the time-frequency map and frequency domain selection module is used for displaying the sound source on the time-frequency map, screening the frequency, observing and analyzing the sound source image.
In a further embodiment of this embodiment, the system further includes a cloud control module, configured to control the sound position and size, clarify the first sound cloud, and observe and analyze the sound source position and size by controlling a fading speed of the first sound cloud.
Example 3
The present embodiment provides a computer-readable storage medium, in which at least one program is stored, where the at least one program is loaded and executed by a processor to implement a local discharge acoustic imaging detection and positioning method as described above.
Computer-readable media may include computer storage media and communication media. Computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Computer storage media includes Random Access Memory (RAM), read Only Memory (ROM), flash memory or other solid state memory technology, compact disc read-only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, collectively referred to as memory.
The memory stores one or more programs configured to be executed by one or more central processing modules, the one or more programs containing instructions for implementing the methods described above, and the central processing module executes the one or more programs to implement the database monitoring synchronization data saving methods provided by the various method embodiments described above.
The memory further comprises one or more programs, the one or more programs are stored in the memory, and the one or more programs comprise steps executed by the computer equipment for carrying out the partial discharge acoustic imaging detection positioning method provided by the embodiment of the application.
The sequence of the above embodiments is only for convenience of description and does not represent the advantages and disadvantages of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A local discharge acoustic imaging detection positioning method is characterized in that,
step 1, starting an acoustic imaging device, positioning a field sound source, and acquiring a first sound cloud picture;
step 2, setting a sound amplitude value and a frequency threshold value, and obtaining a second sound cloud picture, wherein the second sound cloud picture displays the size of a local discharge source and the position of the local discharge source;
step 3, further detecting partial discharge signals by using other sensors;
the first sound cloud comprises: the sound source distribution diagram is used for displaying a live video image and a sound source spatial position in real time; the sound source PRPD map is used for acquiring the sound amplitude and phase distribution relation of the sound source distribution map and synchronously displaying the sound amplitude and phase distribution relation in a PRPD map form; the sound source amplitude map is used for displaying the sound source amplitude distribution in a live video image and the change along with time; and the sound source time domain map is used for displaying the frequency distribution of a sound source in a live video image and the change along with time, and the sound source frequency threshold value can be defined by screening and is used for displaying the position of a local discharge source of the sound source distribution map.
2. The partial discharge acoustic imaging detection and localization method according to claim 1, wherein in step 1, a live sound source is localized, a matrix microphone array is used, raw sound is collected and processed by data analysis through a signal processing algorithm, a visualized sound color high-line video image is formed, and sound source distribution is displayed.
3. The partial discharge acoustic imaging detection and positioning method according to claim 1, wherein in step 3, after the acoustic imaging device is used to locate the partial discharge defect position of the electric power facility, a high frequency sensor, an ultrahigh frequency sensor or an ultrasonic sensor is used to further collect and diagnose the partial discharge signal.
4. The local discharge acoustic imaging detection positioning method according to claim 1, wherein a plurality of sound sources are displayed on the sound source distribution map, a first sound source is selected, the PRPD map of the sound source displays the PRPD map of the first sound source in real time, and the amplitude map and the time domain map of the sound source synchronously display the amplitude and frequency spectrum variation of the first sound source.
5. The local discharge acoustic imaging detection and localization method according to claim 1, wherein the sound source PRPD map is a single frame of sampling data in each period of 360-degree phase average distribution, the sampling data is acoustic energy, and the sampling data is drawn at a single point and can be superposed; the X axis is a phase angle, the Y axis is a sound source amplitude, and the colors of different depths in the sound source PRPD map represent the distribution density of the sound wave energy point cloud.
6. The partial discharge acoustic imaging detection positioning method according to claim 1, wherein the acoustic imaging apparatus comprises: the system comprises a handheld acoustic imaging detector, a connecting wire, a mobile power supply and an intelligent terminal; the handheld acoustic imaging detector is connected with the mobile power supply through the connecting line, and the intelligent terminal is connected with the handheld acoustic imaging detector;
a network module is arranged in the handheld acoustic imaging detector, the intelligent terminal is connected to the network module and displays the first sound cloud picture in real time, and sound positioning of a local discharge source is achieved.
7. The partial discharge acoustic imaging detection and positioning method according to claim 6, wherein the communication process between the handheld acoustic imaging detector and the intelligent terminal comprises:
establishing communication connection between the handheld acoustic imaging detector and the intelligent terminal;
the handheld acoustic imaging detector receives a service command from the intelligent terminal and starts to collect sound source data, wherein the service command comprises: starting, ending and collecting data frames;
the intelligent terminal opens a data receiving interface and receives sound source data of the handheld acoustic imaging detector;
the intelligent terminal receives the sound source data, analyzes and processes the sound source data, and displays a first sound cloud picture of the sound source data in real time;
the intelligent terminal sends a stop command to the handheld acoustic imaging detector, and the handheld acoustic imaging detector stops transmitting sound source data;
and disconnecting the communication connection between the handheld acoustic imaging detector and the intelligent terminal.
8. The local discharge acoustic imaging detection positioning method according to claim 6, wherein the intelligent terminal is configured to receive sound source data and display a first sound cloud, and further comprising: the refreshing module is used for refreshing the live video and the first sound cloud picture in real time; the storage module is used for storing the acquired sound source data; and the video recording module is used for recording the real-time live video and the first sound cloud picture.
9. A partial discharge acoustic imaging detection positioning system, comprising:
the real-time image and sound source synthesis module is used for displaying real-time field video images and displaying the size and the spatial position of a sound source in the video images;
the threshold control module is used for defining and screening a sound amplitude threshold, and displaying and analyzing a local discharge source;
the sound source PRPD module is used for displaying the size of the field sound at different phase positions in a periodic form so as to facilitate subsequent analysis and positioning;
and the time-frequency map and frequency domain selection module is used for displaying the sound source on the time-frequency map, screening frequency for observation and analyzing the sound source image.
10. A computer-readable storage medium, wherein at least one program is stored in the computer-readable storage medium, and the at least one program is loaded and executed by a processor to implement the localization method for localized discharge acoustic imaging detection according to any one of claims 1 to 8.
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