CN111007340A - Method, system and equipment for diagnosing aging of silicone rubber of cable accessory - Google Patents
Method, system and equipment for diagnosing aging of silicone rubber of cable accessory Download PDFInfo
- Publication number
- CN111007340A CN111007340A CN201911296403.4A CN201911296403A CN111007340A CN 111007340 A CN111007340 A CN 111007340A CN 201911296403 A CN201911296403 A CN 201911296403A CN 111007340 A CN111007340 A CN 111007340A
- Authority
- CN
- China
- Prior art keywords
- aging
- silicone rubber
- cable
- ultrasonic
- cable accessory
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0235—Plastics; polymers; soft materials, e.g. rubber
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02863—Electric or magnetic parameters
Abstract
The invention discloses a method, a system and equipment for diagnosing aging of silicone rubber of a cable accessory, which comprises the following steps: carrying out ultrasonic detection on the silicone rubber of the cable accessory by adopting a pulse echo method; collecting ultrasonic signals reflected by silicone rubber of the cable part, and preprocessing the ultrasonic signals; intercepting the bottom wave B from the preprocessed ultrasonic signal, and calculating and analyzing the bottom wave B to obtain an aging degree parameter pad(ii) a According to the aging degree parameter padAnd judging the aging condition of the silicone rubber of the cable accessory. According to the embodiment of the invention, the aging diagnosis is carried out on the silicone rubber of the cable accessory through ultrasonic waves, and the aging degree parameter padThe silicon rubber can be obtained through ultrasonic detection, a sample does not need to be prepared again for testing dielectric parameters (relative dielectric parameters and breakdown strength), and the test can be carried out under the condition that the completeness of the cable accessory rubber piece is ensured, so that the nondestructive evaluation of the cable accessory silicon rubber is realized.
Description
Technical Field
The invention relates to the technical field of cable diagnosis, in particular to a method, a system and equipment for diagnosing aging of silicone rubber of a cable accessory.
Background
The power cable is developed vigorously, so that the novel silicon rubber insulating material can be widely applied to the field of insulation of extra-high voltage cable accessories due to excellent electromechanical and thermal properties of the novel silicon rubber insulating material, but insulation faults occur occasionally, and the novel silicon rubber insulating material becomes a weak link of a cable transmission line. The high-voltage cable accessory made of the silicon rubber has good performance, and has the advantages of low hardness, strong aging resistance and the like compared with other raw materials, thereby ensuring the smooth operation of high-voltage transmission engineering. However, the silicone rubber for cable accessories cannot be prevented from aging, the detection of the aging of the silicone rubber for cable accessories in the prior art is destructive detection, so that the silicone rubber for cable accessories needs to be repaired after detection, and the destructive detection destroys the whole structure of the silicone rubber for cable accessories, so that the service life of the silicone rubber for cable accessories is not long.
In summary, when the silicone rubber for the cable accessories is subjected to aging detection in the prior art, the technical problem that the silicone rubber for the cable accessories needs to be damaged exists.
Disclosure of Invention
The invention provides a method, a system and equipment for diagnosing aging of silicone rubber of a cable accessory, which solve the technical problem that the silicone rubber of the cable accessory needs to be damaged when the silicone rubber of the cable accessory is subjected to aging detection in the prior art.
The invention provides a cable accessory silicon rubber aging diagnosis method and system, which comprises the following steps:
carrying out ultrasonic detection on the silicone rubber of the cable accessory by adopting a pulse echo method;
collecting ultrasonic signals reflected by silicone rubber of the cable part, and preprocessing the ultrasonic signals;
intercepting the bottom wave B from the preprocessed ultrasonic signal, and calculating and analyzing the bottom wave B to obtain an aging degree parameter pad；
According to the aging degree parameter padAnd judging the aging condition of the silicone rubber of the cable accessory.
Preferably, the method for preprocessing the ultrasonic signal is to convert the ultrasonic signal into a digital signal.
Preferably, the bottom surface wave B is calculated and analyzed to obtain the aging degree parameter padThe method comprises the following specific steps:
carrying out amplitude normalization processing on the bottom wave B;
carrying out fast Fourier analysis on the normalized bottom wave B to obtain a frequency spectrum waveform of the bottom wave B;
obtaining a dominant peak f in a spectral waveformpeakAnd a DC direct current component fDCBased on the main peak fpeakAnd a DC direct current component fDCObtaining an aging degree parameter pad。
Preferably, the aging parameter padThe expression of (a) is as follows:
preferably, according to the aging parameter padThe specific process for judging the aging condition of the silicone rubber of the cable accessory is as follows: obtaining an aging degree parameter padDependence on dielectric parameter, by aging parameter padAnd obtaining dielectric parameters, and judging the aging condition of the silicone rubber of the cable accessory according to the dielectric parameters.
Preferably, the aging parameter padThe relationship to dielectric parameter is as follows:
in the formula: x is padY is a dielectric parameter, A1、A2、x0、dxTo obtain parameters by fitting.
The system comprises an ultrasonic probe, an ultrasonic probe control module, a data acquisition module and a data processing module, wherein the ultrasonic probe is connected with one end of the ultrasonic probe control module, the other end of the ultrasonic probe control module is connected with one end of the data acquisition module, and the other end of the data acquisition module is connected with the data processing module.
Preferably, the system further comprises a water tank, and the ultrasonic probe is placed in the water tank.
Preferably, the system further comprises a storage module, and the storage module is connected with the data processing module.
A cable accessory silicon rubber aging diagnosis device comprises a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for the cable accessory silicon rubber aging diagnosis method according to the instructions in the program codes.
According to the technical scheme, the invention has the following advantages:
according to the embodiment of the invention, the aging diagnosis is carried out on the silicone rubber of the cable accessory through ultrasonic waves, and the aging degree parameter padThe silicon rubber can be obtained through ultrasonic detection, a sample does not need to be prepared again for testing dielectric parameters (relative dielectric parameters and breakdown strength), and the test can be carried out under the condition that the completeness of the cable accessory rubber piece is ensured, so that the nondestructive evaluation of the cable accessory silicon rubber is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art 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 exercise.
Fig. 1 is a method flowchart of a method, a system and an apparatus for diagnosing silicone rubber aging of a cable accessory according to an embodiment of the present invention.
Fig. 2 is a system structure diagram of a method, a system and a device for diagnosing silicone rubber aging of a cable accessory according to an embodiment of the present invention.
Fig. 3 is a device structure diagram of a method, a system and a device for diagnosing silicone rubber aging of a cable accessory according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of peaks of an ultrasonic spectrum of a cable accessory silicone rubber provided by an embodiment of the invention.
Fig. 5 is a schematic ultrasonic frequency spectrum diagram of the silicone rubber for cable accessories under different aging times according to the method, the system and the equipment for diagnosing aging of the silicone rubber for cable accessories provided by the embodiment of the invention.
FIG. 6 shows a silicone rubber aging diagnosis method, system and apparatus for cable accessories according to an embodiment of the present inventionadDependence on dielectric parameters.
Detailed Description
The embodiment of the invention provides a method, a system and equipment for diagnosing aging of silicone rubber of a cable accessory, which are used for solving the technical problem that the silicone rubber of the cable accessory needs to be damaged when the silicone rubber of the cable accessory is subjected to aging detection in the prior art.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The nature of ultrasonic wave propagation is the interaction between ultrasonic waves and medium molecules, and acoustic parameters such as ultrasonic wave velocity and ultrasonic wave attenuation depend on microscopic changes inside the medium to a great extent. For example, a change in the density of the medium will cause a change in the propagation characteristics (a decrease in the ultrasonic velocity and an increase in the ultrasonic attenuation). These features can be used to detect changes in material properties. During the operation or aging process of the cable joint rubber insulation layer, the material structure changes, thereby causing the change of material characteristics. By using the change of the insulating layer structure in the aging process as a bridge, the correlation between the ultrasonic parameters (such as ultrasonic frequency spectrum, ultrasonic velocity and the like) and the degradation characteristics of the insulating layer can be obtained by processing and analyzing the ultrasonic signals in the propagation process. Therefore, the deterioration state of the cable joint insulating layer can be nondestructively detected and evaluated using the ultrasonic characteristics.
For ultrasonic spectral analysis, a typical ultrasonic spectrum of silicone rubber is shown in fig. 4. The samples of the silicon rubber materials of the test cable accessories with different thermal aging degrees find that the DC component of the ultrasonic frequency spectrum of the silicon rubber samples is gradually reduced along with the increase of the aging time, the amplitudes of four peak values (peak values A, B, C and D) are generally gradually increased (see figure 5), and the main peak frequency (peak value A) has the tendency of moving towards high frequency. The changes show that the ultrasonic spectrum of the cable joint insulating layer has certain change rule and sensitivity in the thermal aging process, so that the ultrasonic spectrum data can indirectly represent the aging state of the cable joint insulating layer.
Referring to fig. 1, fig. 1 is a method flowchart of a method, a system and an apparatus for diagnosing silicone rubber aging of a cable accessory according to an embodiment of the present invention.
The cable accessory silicon rubber samples are subjected to accelerated thermal aging, samples are respectively taken at intervals to carry out dielectric constant and breakdown field strength tests, and a plurality of groups of relative dielectric constant and breakdown field strength values corresponding to the cable accessory silicon rubber samples with different aging degrees are obtained (example: aging temperature is 225 ℃, sampling interval time is 120h, and sampling is carried out for 6 times).
The invention provides a cable accessory silicon rubber aging diagnosis method and system, which comprises the following steps:
carrying out ultrasonic detection on the silicone rubber of the cable accessory by adopting a pulse echo method;
collecting ultrasonic signals reflected by silicone rubber of the cable part, and preprocessing the ultrasonic signals;
intercepting the bottom wave B from the preprocessed ultrasonic signal, and calculating and analyzing the bottom wave B to obtain an aging degree parameter pad；
According to the aging degree parameter padAnd judging the aging condition of the silicone rubber of the cable accessory.
As a preferred embodiment, the method for preprocessing the ultrasonic signal is to convert the ultrasonic signal into a digital signal by sampling and digitizing with a digital oscilloscope.
As a preferred embodiment, the bottom wave B is calculated and analyzed to obtain the aging degree parameter padThe method comprises the following specific steps:
carrying out amplitude normalization processing on the bottom wave B, and normalizing the amplitude to be [ -1,1 ];
carrying out fast Fourier transform on the normalized bottom wave B to obtain a frequency spectrum waveform of the bottom wave B;
obtaining a dominant peak f in a spectral waveformpeakAnd a DC direct current component fDCSince the DC direct current component is not affected by the ultrasonic propagation medium, it can be used to calibrate the main peak A of the ultrasonic spectrum based on the main peak fpeakAnd a DC direct current component fDCObtaining an aging degree parameter pad。
As a preferred embodiment, the aging parameter padThe expression of (a) is as follows:
as a preferred embodiment, according to the aging parameter padThe specific process for judging the aging condition of the silicone rubber of the cable accessory is as follows: obtaining an aging degree parameter padDependence on dielectric parameter, by aging parameter padAnd obtaining dielectric parameters, and judging the aging condition of the silicone rubber of the cable accessory according to the dielectric parameters. The dielectric parameters comprise a relative dielectric constant and breakdown strength which are two main electrical property parameters of the insulating material, and the aging degree of the insulation in the electrical equipment can be judged by measuring the relative dielectric constant and the breakdown strength.
As a preferred embodiment, the aging parameter padThe relationship to dielectric parameter is as follows:
in the formula: x is padY is a dielectric parameter, A1、A2、x0、dxTo obtain parameters by fitting.
FIG. 6 shows the aging parameter padAnd dielectric parameters (relative dielectric constant and breakdown strength). By best fitting using MATLAB, the relationship satisfies the boltzmann distribution, and the fitting results of the coefficients in equation (2) are shown in the table. The fitting effect of the Boltzmann distribution is good, which shows that the relative dielectric constant and the breakdown strength of the silicone rubber after thermal aging can be measured by the aging degree parameter padIndirectly characterised, i.e. characterised by the ageing parameter padThe silicone rubber samples were evaluated for aging.
TABLE 1 fitting parameter values (based on example data fitting results)
| Parameter(s) | A1 | A2 | x0 | dx |
| Relative dielectric constant | 3.04 | 3.90 | 2.72 | 1.25 |
| Breakdown strength | 8242.33 | 22.98 | -22.61 | 3.25 |
Substituting the fitting values A1, A2, x0 and dx into formula (2) to obtain the dielectric parameters and the aging characteristic parameter p of the current silicon rubber material under different aging degreesadThe aging characteristic parameter p can be obtained by ultrasonic testing for the same batch of silicon rubber cable accessory productsadAnd quantitatively calculating and estimating the dielectric constant and the breakdown field intensity, and further diagnosing the aging state.
Referring to fig. 2, fig. 2 is a system structure diagram of a method, a system and an apparatus for diagnosing silicone rubber aging of a cable accessory according to an embodiment of the present invention.
A cable accessory silicone rubber aging diagnosis system is based on the cable accessory silicone rubber aging diagnosis method and comprises an ultrasonic probe 1, an ultrasonic probe control module 2, a data acquisition module 3 and a data processing module 4, wherein the ultrasonic probe 1 is connected with one end of the ultrasonic probe control module 2, the other end of the ultrasonic probe control module 2 is connected with one end of the data acquisition module 3, and the other end of the data acquisition module 3 is connected with the data processing module 4.
Further, the working principle of the system is explained:
place cable accessories silicon rubber 5 under ultrasonic transducer 1, this system during operation, ultrasonic transducer control module 2 controls ultrasonic transducer 1 and launches the ultrasonic wave of fixed frequency, the ultrasonic wave takes place the reflection behind transmission to cable accessories silicon rubber 5, ultrasonic transducer 1 gathers the ultrasonic wave that reflects back, and the ultrasonic data transmission who will gather to data acquisition module 3, data acquisition module 3 carries out the analysis and detection in sending ultrasonic data to data processing module 4, thereby judge out cable accessories silicon rubber 5's the ageing condition.
As a preferred embodiment, the system also comprises a water tank 4, the ultrasonic probe 1 is arranged in the water tank 4, water is used as coupling agent, and the coupling agent is used as medium to conduct ultrasonic signals, so that the acquired signals are clearer.
As a preferred embodiment, the system further comprises a storage module, which is connected to the data processing module 4.
As shown in fig. 3, a silicone rubber aging diagnosis apparatus 30 for cable accessories, the apparatus includes a processor 300 and a memory 301;
the memory 301 is used for storing a program code 302 and transmitting the program code 302 to the processor;
the processor 300 is configured to execute the steps of the method for diagnosing silicone rubber aging of a cable accessory according to the instructions in the program code 302.
Illustratively, the computer program 302 may be partitioned into one or more modules/units that are stored in the memory 301 and executed by the processor 300 to accomplish the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 302 in the terminal device 30.
The terminal device 30 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device may include, but is not limited to, a processor 300, a memory 301. Those skilled in the art will appreciate that fig. 3 is merely an example of a terminal device 30 and does not constitute a limitation of terminal device 30 and may include more or fewer components than shown, or some components may be combined, or different components, e.g., the terminal device may also include input-output devices, network access devices, buses, etc.
The Processor 300 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 301 may be an internal storage unit of the terminal device 30, such as a hard disk or a memory of the terminal device 30. The memory 301 may also be an external storage device of the terminal device 30, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the terminal device 30. Further, the memory 301 may also include both an internal storage unit and an external storage device of the terminal device 30. The memory 301 is used for storing the computer program and other programs and data required by the terminal device. The memory 301 may also be used to temporarily store data that has been output or is to be output.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; 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 silicone rubber aging diagnosis method for cable accessories is characterized by comprising the following steps:
carrying out ultrasonic detection on the silicone rubber of the cable accessory by adopting a pulse echo method;
collecting ultrasonic signals reflected by silicone rubber of the cable part, and preprocessing the ultrasonic signals;
intercepting the bottom wave B from the preprocessed ultrasonic signal, and calculating and analyzing the bottom wave B to obtain an aging degree parameter pad；
According to the aging degree parameter padAnd judging the aging condition of the silicone rubber of the cable accessory.
2. The method for diagnosing the silicone rubber aging of the cable accessory according to claim 1, wherein the method for preprocessing the ultrasonic signal is to convert the ultrasonic signal into a digital signal.
3. The silicone rubber aging diagnosis method for cable accessories according to claim 2, wherein the background wave B is calculated and analyzed to obtain an aging degree parameter padThe method comprises the following specific steps:
carrying out amplitude normalization processing on the bottom wave B;
carrying out fast Fourier transform on the normalized bottom wave B to obtain a frequency spectrum waveform of the bottom wave B;
obtaining a dominant peak f in a spectral waveformpeakAnd a DC direct current component fDCBased on the main peak fpeakAnd a DC direct current component fDCObtaining an aging degree parameter pad。
4. The method for diagnosing the aging of silicone rubber for cable accessories as claimed in claim 3, wherein the aging degree parameter p isadThe expression of (a) is as follows:
5. the method for diagnosing the aging of silicone rubber for cable accessories as claimed in claim 4, wherein the parameter p is an aging degreeadThe specific process for judging the aging condition of the silicone rubber of the cable accessory is as follows: obtaining an aging degree parameter padDependence on dielectric parameter, by aging parameter padAnd obtaining dielectric parameters, and judging the aging condition of the silicone rubber of the cable accessory according to the dielectric parameters.
6. The method for diagnosing the aging of silicone rubber for cable accessories as claimed in claim 5, wherein the aging parameter p isadThe relationship to dielectric parameter is as follows:
in the formula: x is padY is a dielectric parameter, A1、A2、x0、dxTo obtain parameters by fitting.
7. A silicone rubber aging diagnosis system for cable accessories, which is based on the silicone rubber aging diagnosis method for cable accessories as claimed in any one of claims 1 to 5, and is characterized by comprising an ultrasonic probe, an ultrasonic probe control module, a data acquisition module and a data processing module, wherein the ultrasonic probe is connected with one end of the ultrasonic probe control module, the other end of the ultrasonic probe control module is connected with one end of the data acquisition module, and the other end of the data acquisition module is connected with the data processing module.
8. The system of claim 7, further comprising a water tank, wherein the ultrasonic probe is disposed in the water tank.
9. The system for diagnosing silicone rubber aging of an electrical cable accessory according to claim 8, further comprising a storage module connected to the data processing module.
10. The equipment for diagnosing the silicone rubber aging of the cable accessory is characterized by comprising a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing the cable accessory silicon rubber aging diagnosis method according to any one of claims 1 to 6 according to instructions in the program code.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911296403.4A CN111007340A (en) | 2019-12-16 | 2019-12-16 | Method, system and equipment for diagnosing aging of silicone rubber of cable accessory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911296403.4A CN111007340A (en) | 2019-12-16 | 2019-12-16 | Method, system and equipment for diagnosing aging of silicone rubber of cable accessory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111007340A true CN111007340A (en) | 2020-04-14 |
Family
ID=70114910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911296403.4A Pending CN111007340A (en) | 2019-12-16 | 2019-12-16 | Method, system and equipment for diagnosing aging of silicone rubber of cable accessory |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111007340A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803312A (en) * | 2020-12-30 | 2021-05-14 | 广东电网有限责任公司电力科学研究院 | Preparation method of silicon rubber prefabricated part slice of cable intermediate joint |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644745A (en) * | 2009-09-04 | 2010-02-10 | 西安交通大学 | Method for dual-frequency ultrasonic detection of defect of generator stator insulator |
| CN106033073A (en) * | 2016-06-30 | 2016-10-19 | 西安交通大学 | Cable detection and evaluation method based on ultrasonic reflection |
| CN106645404A (en) * | 2016-11-23 | 2017-05-10 | 平高集团有限公司 | Nondestructive testing method and device for basin type insulator curing degree of high-voltage switch equipment |
| CN108303366A (en) * | 2017-12-25 | 2018-07-20 | 华南理工大学 | A kind of silastic material ageing state multivariate joint probability analysis method |
| CN108802194A (en) * | 2018-06-06 | 2018-11-13 | 西南交通大学 | A method of pantograph pan degree of aging is assessed based on ultrasonic wave |
-
2019
- 2019-12-16 CN CN201911296403.4A patent/CN111007340A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644745A (en) * | 2009-09-04 | 2010-02-10 | 西安交通大学 | Method for dual-frequency ultrasonic detection of defect of generator stator insulator |
| CN106033073A (en) * | 2016-06-30 | 2016-10-19 | 西安交通大学 | Cable detection and evaluation method based on ultrasonic reflection |
| CN106645404A (en) * | 2016-11-23 | 2017-05-10 | 平高集团有限公司 | Nondestructive testing method and device for basin type insulator curing degree of high-voltage switch equipment |
| CN108303366A (en) * | 2017-12-25 | 2018-07-20 | 华南理工大学 | A kind of silastic material ageing state multivariate joint probability analysis method |
| CN108802194A (en) * | 2018-06-06 | 2018-11-13 | 西南交通大学 | A method of pantograph pan degree of aging is assessed based on ultrasonic wave |
Non-Patent Citations (1)
| Title |
|---|
| XIN YU等: "Evaluation of insulation layer of silicon rubber cable joint with thermal ageing by ultrasonic detection", 《2018 INTERNATIONAL CONFERENCE ON POWER SYSTEM TECHNOLOGY》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112803312A (en) * | 2020-12-30 | 2021-05-14 | 广东电网有限责任公司电力科学研究院 | Preparation method of silicon rubber prefabricated part slice of cable intermediate joint |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Shi et al. | A new algorithm for wire fault location using time-domain reflectometry | |
| Shi et al. | Wire fault diagnosis in the frequency domain by impedance spectroscopy | |
| US7120563B2 (en) | Wire fault detection | |
| JP6738135B2 (en) | How to perform electrical cable fault detection on a computer | |
| US7139668B2 (en) | Wire event detection | |
| US20160139194A1 (en) | Reflectometry method for identifying soft faults affecting a cable | |
| CN104237713B (en) | Deformation of transformer winding diagnostic method based on wavelet transform | |
| EP3014778B1 (en) | A test device and a method for determining communication characteristics of a metal cable | |
| CN109490730A (en) | Cable discharge detection method, device, storage medium and processor | |
| US20190107573A1 (en) | Method for detecting soft faults in a cable by data fusion | |
| US9880212B2 (en) | Method and apparatus for spatially resolved diagnosis | |
| CN110044533B (en) | Bolt pretightening force monitoring method based on combination of EMD (empirical mode decomposition) energy entropy and support vector machine | |
| KR101213195B1 (en) | Cable fault diagnostic method and system | |
| CN107064846A (en) | The sensitivity detection method and device of live testing apparatus for local discharge | |
| González et al. | Electromechanical characterization of piezoelectric polymer thin films in a broad frequency range | |
| US20180024184A1 (en) | Method for characterising a soft fault in a cable | |
| CN111007340A (en) | Method, system and equipment for diagnosing aging of silicone rubber of cable accessory | |
| CN110231547B (en) | Nondestructive testing evaluation method for cable state evaluation | |
| Tang et al. | A method based on SVD for detecting the defect using the magnetostrictive guided wave technique | |
| Draudvilienė et al. | The methodology for the reliability evaluation of the signal processing methods used for the dispersion estimation of Lamb waves | |
| Mesnil et al. | Self-referenced robust guided wave based defect detection: Application to woven composite parts of complex shape | |
| CN110764027B (en) | Electric connector intermittent fault diagnosis method based on frequency spectrum characteristic change | |
| Souza et al. | An effective structural health monitoring methodology for damage isolation based on multisensor arrangements | |
| KR101102496B1 (en) | Method for deriving state determination equation, apparatus and method for diagnosis of power equipment using the same | |
| Schuet | Wiring Diagnostics Via $\ell_1 $-Regularized Least Squares |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200414 |
|
| WD01 | Invention patent application deemed withdrawn after publication |