CN213121724U - Porcelain post insulator vibration acoustics on-line monitoring system based on thing networking - Google Patents
Porcelain post insulator vibration acoustics on-line monitoring system based on thing networking Download PDFInfo
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- CN213121724U CN213121724U CN202021369058.0U CN202021369058U CN213121724U CN 213121724 U CN213121724 U CN 213121724U CN 202021369058 U CN202021369058 U CN 202021369058U CN 213121724 U CN213121724 U CN 213121724U
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Abstract
The utility model discloses a porcelain post insulator vibroacoustics on-line monitoring system based on thing networking, including thing networking cloud ware and a plurality of porcelain post insulator vibroacoustics monitor, porcelain post insulator vibroacoustics monitor includes porcelain post insulator and piezoelectric vibration exciter, piezoelectric acceleration sensor and controller, and porcelain post insulator includes insulator vase and insulator lower flange, and piezoelectric vibration exciter and piezoelectric acceleration sensor set up at insulator lower flange lower extreme, and the controller is respectively with piezoelectric vibration exciter and piezoelectric acceleration sensor electric connection; the controller is in communication connection with the Internet of things cloud server through the wireless communication module; and the Internet of things cloud server is in communication connection with the user terminal. The utility model provides a porcelain post insulator vibration acoustics on-line monitoring system based on thing networking, simple structure, convenient operation, but real-time supervision transformer substation's porcelain post insulator's vibration signal, its mechanical properties of dynamic identification changes, and then differentiates its trouble.
Description
Technical Field
The utility model relates to a porcelain post insulator detects technical field, especially relates to a porcelain post insulator vibration acoustics on-line monitoring system based on thing networking.
Background
The porcelain post insulator is an important component of a power grid system and plays a role in supporting a wire and insulating. Because the electric porcelain product is a mixed material and mainly comprises quartz particles distributed in a glass state matrix, the micro-crack defect is easy to appear in the porcelain piece because the linear expansion coefficients of the matrix and the quartz particles are different. Since ceramic materials are typically brittle materials, cracks propagate very easily with serious consequences. At present, certain theoretical basic research is carried out on the detection technology of the porcelain post insulator at home and abroad. The defect mechanism of the insulator is divided into two types: firstly, the insulator can be subjected to certain stress in the working process to generate fatigue damage; secondly, in the area with large temperature difference, the flange and the porcelain body of the insulator are debonded due to different expansion coefficients of the materials and the manufacturing process of the insulator, so that defects are generated. According to the relevant statistical data, 90% of the damage patterns of the porcelain post insulators occurred between the lower flange and the first porcelain cluster.
The conventional methods for detecting the porcelain insulator, such as an ultrasonic detection method and an infrared imaging method, have the problems of poor detection of microcrack defects, a large number of interference factors, incapability of online live detection and the like, and are difficult to meet the requirements for effectively detecting and diagnosing the porcelain insulator. Although the vibro-acoustic detection method can realize live detection and has related detection instruments, the existing detection process is complicated, most importantly, the mechanical performance of the insulator cannot be known in two detection periods, and the state of the insulator cannot be monitored in real time and disastrous accidents cannot be prevented in time. Therefore, the research of adopting an insulator online monitoring system with high reliability and strong field adaptability to diagnose the mechanical property of the porcelain insulator in real time becomes an urgent requirement, and has very great safety and economic benefits.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a porcelain post insulator vibration acoustics on-line monitoring system based on thing networking, simple structure, convenient operation, but real-time supervision transformer substation's porcelain post insulator's vibration signal, its mechanical properties of dynamic identification changes, and then differentiates its trouble.
In order to achieve the above object, the utility model provides a following scheme:
a porcelain post insulator vibro-acoustic online monitoring system based on the Internet of things comprises an Internet of things cloud server and a plurality of porcelain post insulator vibro-acoustic monitors, wherein each porcelain post insulator vibro-acoustic monitor comprises a porcelain post insulator, a piezoelectric vibration exciter, a piezoelectric acceleration sensor and a controller, the porcelain post insulator comprises an insulator porcelain bottle and an insulator lower flange which are fixedly connected with each other from top to bottom, the piezoelectric vibration exciter and the piezoelectric acceleration sensor are arranged at the lower end of the insulator lower flange, the controller is arranged at the lower ends of the piezoelectric vibration exciter and the piezoelectric acceleration sensor, and the controller is electrically connected with the piezoelectric vibration exciter and the piezoelectric acceleration sensor respectively; the controller is also connected with a wireless communication module and is in communication connection with the Internet of things cloud server through the wireless communication module; and the Internet of things cloud server is in communication connection with the user terminal.
Optionally, the piezoelectric vibration exciter and the piezoelectric acceleration sensor are respectively connected to the lower end of the lower insulator flange through strong magnets.
Optionally, the porcelain post insulator vibration acoustic monitor further comprises a controller housing, and the controller and the wireless communication module are arranged in the controller housing.
Optionally, the user terminal is a PC terminal, a tablet, or a smart phone.
Optionally, the piezoelectric acceleration sensor is a CA-YD-1182 piezoelectric acceleration sensor.
Optionally, the controller is a lower computer which takes a 32-chip microcomputer as a main control CPU and integrates a vibration excitation module, a vibration acquisition module, a signal noise reduction filtering module and a signal temporary storage module.
Optionally, the internet of things cloud server selects an OneNET internet of things platform.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect: the utility model provides a porcelain post insulator vibroacoustics on-line monitoring system based on thing networking communicates with a plurality of porcelain post insulator vibroacoustics monitors through thing networking cloud ware, through wireless network communication technology, forms an interconnected network between each insulator of transformer substation, and the vibration data of each insulator of transformer substation is uploaded to unified cloud platform through the network to carry out specific storage according to the serial number of insulator, can look over at any time; the piezoelectric vibration exciter and the piezoelectric acceleration sensor are adopted to realize remote data acquisition, the acquisition position deviation in manual vibro-acoustic detection is avoided, the method is practical and easy to operate, the labor force is greatly reduced, the problem that most of the existing detection technologies cannot carry out live-line detection, such as an ultrasonic detection method, can also be solved, the complexity of the existing insulator detection process is greatly reduced, and the on-line monitoring of the porcelain pillar insulator by adopting a vibro-acoustic detection method is realized; the mechanical performance of the insulator can be effectively monitored for a long time, the fault characteristics of the insulator can be identified in time, each insulator can be tracked and observed, and the method has great popularization and application values.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of an internet-of-things-based porcelain post insulator vibro-acoustic online monitoring system in an embodiment of the present invention;
fig. 2 is a schematic structural view of the piezoelectric vibration exciter of the present invention;
fig. 3 is a schematic structural diagram of the piezoelectric acceleration sensor acquisition end of the present invention;
fig. 4 is a flowchart of the operation of the cloud server of the internet of things according to the embodiment of the present invention;
fig. 5 is a flow chart of the porcelain post insulator fault determination of the embodiment of the present invention;
fig. 6 is a flow chart of the insulator online monitoring according to the embodiment of the present invention.
Reference numerals: 1. an insulator porcelain insulator; 2. an insulator lower flange; 3. a strong magnet; 4. a piezoelectric vibration exciter; 5. a piezoelectric acceleration sensor; 6. a controller housing; 7. a controller; 8. an Internet of things cloud server; 9. a piezoelectric ceramic sheet group; 10. a separator; 11. a balancing weight; 12. a gasket; 13. an M4 nut; 14. m4 screw.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a porcelain post insulator vibration acoustics on-line monitoring system based on thing networking, simple structure, convenient operation, but real-time supervision transformer substation's porcelain post insulator's vibration signal, its mechanical properties of dynamic identification changes, and then differentiates its trouble.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, the embodiment of the utility model provides a porcelain post insulator vibration acoustics on-line monitoring system based on thing networking, include: the internet of things cloud server 8 and a plurality of porcelain post insulator vibroacoustic monitors, wherein each porcelain post insulator vibroacoustic monitor comprises a porcelain post insulator, a piezoelectric vibration exciter 4, a piezoelectric acceleration sensor 5 and a controller 7, each porcelain post insulator comprises an insulator porcelain insulator 1 and an insulator lower flange 2 which are fixedly connected from top to bottom, the piezoelectric vibration exciter 4 and the piezoelectric acceleration sensor 5 are arranged at the lower end of the insulator lower flange 2, the controller 7 is arranged at the lower ends of the piezoelectric vibration exciter 4 and the piezoelectric acceleration sensor 5, and the controller 7 is electrically connected with the piezoelectric vibration exciter 4 and the piezoelectric acceleration sensor 5 respectively; the controller 7 is also connected with a wireless communication module, and the controller 7 is in communication connection with the internet of things cloud server 8 through the wireless communication module; and the Internet of things cloud server 8 is in communication connection with the user terminal.
The piezoelectric vibration exciter 4 and the piezoelectric acceleration sensor 5 are respectively connected to the lower end of the insulator lower flange 2 in an adsorption mode through a strong magnet 3.
The porcelain post insulator vibration acoustic monitor further comprises a controller shell 6, and the controller 7 and the wireless communication module are arranged in the controller shell 6.
The user terminal is a PC terminal, a tablet or a smart phone. The piezoelectric acceleration sensor 5 is a CA-YD-1182 piezoelectric acceleration sensor, and as shown in fig. 3, the piezoelectric acceleration sensor 5 is connected with the powerful magnet 3 through a nut. As shown in fig. 2, the piezoelectric vibration exciter 4 is of a conventional structure, and as shown in fig. 2, comprises a piezoelectric ceramic sheet group 9, a spacer 10, a counterweight 11, a gasket 12, an M4 nut 13, and an M4 screw 14, and is further provided with a powerful magnet 3.
The controller 7 is a lower computer which takes a 32-chip microcomputer as a main control CPU and integrates a vibration excitation module, a vibration acquisition module, a signal noise reduction filtering module and a signal temporary storage module. And the Internet of things cloud server 8 selects an OneNet Internet of things platform. The platform can help a developer to easily realize equipment access and equipment connection, and the OneNET platform supports various transmission protocols such as HTTP, EDP, Modbus, TCP and the like, and has good visual application.
The method disclosed by the invention integrates a vibroacoustic detection method and the technology of the Internet of things, and is specially designed for solving the problems that most diagnosis methods cannot realize live detection, the detection efficiency is low, and the data processing is complicated in the process of fault diagnosis of the porcelain post insulator of the transformer substation.
Firstly, in order to effectively excite the vibration of the insulator, accurately measure the vibration signal and perform subsequent processing, as shown in fig. 1, 2 and 3, the invention measures the vertical vibration of the porcelain post insulator, and firstly needs to make the insulator vibrate, and the method is realized by the following steps: under the control of a piezoelectric vibration exciter controller, white noise excitation is continuously generated to enable the insulator to vibrate, after one second, a piezoelectric sensor starts to collect vibration signals, the sampling frequency is 48000Hz, the collection duration is 300 milliseconds, three times of measurement are repeated to complete a data collection period, and then the collected vibration signals are subjected to digital-to-analog conversion through noise reduction and filtering and are temporarily stored.
Second, referring to fig. 4 and 6, uploading data to the cloud platform database: (1) firstly, registering a login account number on an OneNet platform, and entering a developer center; (2) the OneNet platform supports various equipment access protocols, each transmission protocol has a suitable application scene, and products under a TCP transparent transmission protocol are selected to be established in the application, because the TCP transparent transmission can keep long connection and can be communicated in two directions, the OneNet platform is not limited to a single data format, and a user can define the data format by himself; (3) after the product is created, prompt to add equipment immediately, namely, enter the product, switch to an equipment list page, click the created equipment, fill in equipment information, and finish the addition of one equipment after confirming the addition; (4) when the device uploads and stores data, the data must be uploaded in a key-value format, wherein key is the name of a data stream (stream), value is an actually stored data point (point), the value format can be multiple self-defined formats such as int, float, string, json and the like, the data in the data stream can flow to subsequent services while being stored, a data platform in the data stream can be stored in a time sequence by default, and a user can query the values of the data points at different times in the data stream; (5) through the OneNET application editor, a user can conveniently and quickly realize the visualization of the device data flow on the OneNET platform.
Thirdly, accurately processing corresponding data, and comparing and classifying the mechanical properties of the insulator according to a processing result: referring to fig. 5 and 6, that is, data managed by serial numbers in the cloud database is subjected to subsequent processing, a spectrogram of the vibration signal is checked, the same insulator stipulates that the measurement is performed three times in each monitoring process, the three-time measurement signal is subjected to spectrum analysis, and more than two spectrograms have high consistency, so that the measurement process is proved to be correct; on the basis, if the spectrogram has a peak value of about 2000Hz, the fault near the lower flange of the insulator can be judged; if the spectrogram has a peak value of about 8000Hz, the upper flange end can be judged to have a fault, if the fault characteristic is not obvious and is different from the normal insulator spectrogram, the fault can be specially calibrated, the tracking observation is continued, and the spectral change is focused in the next measurement process; and each insulator can compare and analyze the processing results of nearly a few times, and the occurrence of faults can be prevented according to the change of the mechanical property of the insulator.
The method for carrying out fault analysis and classified early warning on the vibration signals in the cloud database by the porcelain post insulator vibration acoustic online monitoring system based on the Internet of things comprises the following steps: firstly, performing frequency spectrum analysis on vibration signals measured by the same insulator each time, performing FFT (fast Fourier transform) conversion, checking the natural frequency of the vibration signals, and according to the existing theory, the characteristic natural frequency range of the normal 110kv and 220kv porcelain post insulators is within 3000 Hz-5000 Hz, if the upper end of the porcelain post insulator breaks down, another peak appears on a spectrogram at about 8000Hz, and if the lower end of the porcelain post insulator breaks down, another peak appears at about 2000 Hz. The vibration signals measured by the same insulator at the same time are compared to judge whether the insulator has a fault or not, and in addition, the signals measured by the same insulator at the previous period are compared with the signals measured at the current period, so that the mechanical condition of the insulator can be dynamically tracked. The insulators can be classified into three types according to the processing result, namely normal, suspected fault and fault. The processing results are respectively stored in the cloud databases, and the computer can check the processing results at any time, so that the method can effectively prevent accidents.
The utility model provides a porcelain post insulator vibroacoustics on-line monitoring system based on thing networking communicates with a plurality of porcelain post insulator vibroacoustics monitors through thing networking cloud ware, through wireless network communication technology, forms an interconnected network between each insulator of transformer substation, and the vibration data of each insulator of transformer substation is uploaded to unified cloud platform through the network to carry out specific storage according to the serial number of insulator, can look over at any time; the piezoelectric vibration exciter and the piezoelectric acceleration sensor are adopted to realize remote data acquisition, the acquisition position deviation in manual vibro-acoustic detection is avoided, the method is practical and easy to operate, the labor force is greatly reduced, the problem that most of the existing detection technologies cannot carry out live-line detection, such as an ultrasonic detection method, can also be solved, the complexity of the existing insulator detection process is greatly reduced, and the on-line monitoring of the porcelain pillar insulator by adopting a vibro-acoustic detection method is realized; the mechanical performance of the insulator can be effectively monitored for a long time, the fault characteristics of the insulator can be timely identified, each insulator can be tracked and observed, and the method has great popularization and application values.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (7)
1. The utility model provides a porcelain post insulator vibration acoustics on-line monitoring system based on thing networking which characterized in that includes: the system comprises an Internet of things cloud server and a plurality of porcelain post insulator vibroacoustic monitors, wherein each porcelain post insulator vibroacoustic monitor comprises a porcelain post insulator, a piezoelectric vibration exciter, a piezoelectric acceleration sensor and a controller, each porcelain post insulator comprises an insulator porcelain insulator and an insulator lower flange which are fixedly connected from top to bottom, the piezoelectric vibration exciter and the piezoelectric acceleration sensor are arranged at the lower end of the insulator lower flange, the controller is arranged at the lower ends of the piezoelectric vibration exciter and the piezoelectric acceleration sensor, and the controller is electrically connected with the piezoelectric vibration exciter and the piezoelectric acceleration sensor respectively; the controller is also connected with a wireless communication module and is in communication connection with the Internet of things cloud server through the wireless communication module; and the Internet of things cloud server is in communication connection with the user terminal.
2. The Internet of things-based porcelain post insulator vibro-acoustic online monitoring system of claim 1, wherein the piezoelectric vibration exciter and the piezoelectric acceleration sensor are respectively connected to the lower end of the insulator lower flange through strong magnet adsorption.
3. The Internet of things-based porcelain post insulator vibroacoustic online monitoring system of claim 1, wherein the porcelain post insulator vibroacoustic monitor further comprises a controller housing, and the controller and the wireless communication module are arranged in the controller housing.
4. The Internet of things-based porcelain post insulator vibro-acoustic online monitoring system of claim 1, wherein the user terminal is a PC terminal, a tablet or a smart phone.
5. The Internet of things-based porcelain post insulator vibro-acoustic online monitoring system of claim 1, wherein the piezoelectric acceleration sensor is a CA-YD-1182 type piezoelectric acceleration sensor.
6. The porcelain post insulator vibro-acoustic online monitoring system based on the internet of things of claim 1, wherein the controller is a lower computer which takes a 32-chip microcomputer as a main control CPU and integrates a vibration excitation module, a vibration acquisition module, a signal noise reduction and filtering module and a signal temporary storage module.
7. The porcelain post insulator vibration acoustic online monitoring system based on the internet of things of claim 1, wherein the internet of things cloud server selects an OneNET internet of things platform.
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| CN202021369058.0U CN213121724U (en) | 2020-07-14 | 2020-07-14 | Porcelain post insulator vibration acoustics on-line monitoring system based on thing networking |
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| CN202021369058.0U CN213121724U (en) | 2020-07-14 | 2020-07-14 | Porcelain post insulator vibration acoustics on-line monitoring system based on thing networking |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113340991A (en) * | 2021-06-21 | 2021-09-03 | 海南电网有限责任公司乐东供电局 | Vibration acoustic detection device for porcelain post insulator |
| CN114545106A (en) * | 2020-11-26 | 2022-05-27 | 国网天津市电力公司 | Composite insulator aging degree testing method |
-
2020
- 2020-07-14 CN CN202021369058.0U patent/CN213121724U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114545106A (en) * | 2020-11-26 | 2022-05-27 | 国网天津市电力公司 | Composite insulator aging degree testing method |
| CN113340991A (en) * | 2021-06-21 | 2021-09-03 | 海南电网有限责任公司乐东供电局 | Vibration acoustic detection device for porcelain post insulator |
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