CN106950228A - A kind of composite insulator defect non-destructive detecting device - Google Patents
A kind of composite insulator defect non-destructive detecting device Download PDFInfo
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- CN106950228A CN106950228A CN201710163603.7A CN201710163603A CN106950228A CN 106950228 A CN106950228 A CN 106950228A CN 201710163603 A CN201710163603 A CN 201710163603A CN 106950228 A CN106950228 A CN 106950228A
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- 230000007547 defect Effects 0.000 title claims abstract description 37
- 239000012212 insulator Substances 0.000 title claims abstract description 32
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 230000001066 destructive effect Effects 0.000 title claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 239000000523 sample Substances 0.000 claims abstract description 13
- 230000008878 coupling Effects 0.000 claims abstract description 11
- 238000010168 coupling process Methods 0.000 claims abstract description 11
- 238000005859 coupling reaction Methods 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
- G01N22/02—Investigating the presence of flaws
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Abstract
The invention discloses a kind of composite insulator defect non-destructive detecting device, the equipment includes：Microwave source, for providing microwave signal；Waveguide, the microwave signal for the microwave source to be provided is conducted to object to be measured；Coupling probe, for launching incoming signal and including the reflected signal of measured object, and the incoming signal and reflected signal is separated and receiver is sent to；Receiver, for collecting the transmission signal of measured object and being sent to receiver.The microwave signal that the microwave source is provided is variable-frequency microwave signal, and frequency range is 4 30GHz, and stepped intervals are 0.1MHz；The composite insulator defect non-destructive detecting device includes the waveguide of at least two different sizes.The present invention can detect the defect situation inside composite insulator exactly, simultaneously because sweep characteristic, the size that testing result can be further to defect is analyzed and judged, with more universality.
Description
Technical field
The present invention relates to technical field of electric power, more particularly to a kind of defect detection equipment of composite insulator.
Background technology
At present, the compound inslation quantum count in the use of China's linked network is about 7,000,000, and the numeral is constantly in growth
In state.The foundation stone insulated as ultra-high-tension power transmission line, composite insulator is served in terms of national safety in production life is ensured
Irreplaceable effect.Due to reasons such as aging degree of umbrella skirt, mechanical breakings, often there are many meat in the internal or external of composite insulator
The defect of eye None- identified.The presence of these defects can greatly reduce the electric property of composite insulator, and ultimately result in dirt
The generation of the major accidents such as sudden strain of a muscle.
Currently, the Non-Destructive Testing to composite insulator internal flaw mainly has the means such as infrared, ultraviolet, microwave.Wherein surpass
The traditional means such as sound, infrared have very good performance when detecting some certain types of defects.But it is infrared, ultraviolet etc.
Detection means, can only be detected when insulator linked network is powered, and the requirement to objective environment is high.
Microwave Detecting Technology is a kind of detection technique gradually risen in recent years, and common microwave detection uses reflective inspection
Survey method, can only read the amplitude information of incoming signal and reflected signal using the detection method, and such method is obtained
Information content is too small, it is easy to cause missing inspection or false retrieval.
Meanwhile, common microwave detection uses the composite insulator breakdown judge side of continuous wave Microwave Detecting Technology
Method, launches certain fixed frequency (24GHz) continuous wave of amplitude, and pass through by microwave generating source during detection to composite insulator
Measurement transmitted wave signal intensity simultaneously judges whether it carries out defects detection in normal range (NR) to composite insulator.Using this solid
Frequency detecting method is determined, its characteristic frequency may be more sensitive to a certain defect, to other defect and insensitive.Meanwhile, it is specific
Frequency detecting means specific wavelength, i.e., the detection ripple is fixed to the SENSITIVE SIZE of flaw indication.So, fixed frequency
Detection method is only suitable for the detection of the certain types of defect of specific dimensions.
As can be seen here, there is low universality, easy missing inspection, false retrieval etc. and lack in existing composite insulator defect detection equipment
Fall into.
The content of the invention
It is an object of the invention to a kind of can accurately detect the compound of composite insulator internal flaw situation providing
Defects of insulator non-destructive detecting device.
The technical solution for realizing the object of the invention is：A kind of composite insulator defect non-destructive detecting device, including：
Microwave source, for providing microwave signal；
Waveguide, the microwave signal for the microwave source to be provided is conducted to object to be measured；
Coupling probe, for launching incoming signal and including the reflected signal of measured object, and by the incoming signal
Separated with reflected signal and be sent to receiver；
Receiver, for collecting the transmission signal of measured object and being sent to receiver；
Receiver, for receiving the incoming signal, reflected signal and transmission signal and being sent to analyzer；
Analyzer, calculates and analyzes to determine having for defect according to the incoming signal, reflected signal and transmission signal
The size of nothing and/or the estimation defect.
Further, the microwave signal that the microwave source is provided is variable-frequency microwave signal.
Further, the frequency range of the variable-frequency microwave signal is 4-30GHz, and stepped intervals are 0.1MHz.
Further, the composite insulator defect non-destructive detecting device includes the waveguide of at least two different sizes.
Compared with prior art, its remarkable advantage is the present invention：(1) it can detect exactly inside composite insulator
Defect, is able to detect that incidence, reflection, the frequency of transmission signal, amplitude and phase information, greatly saves detection data
Information content is to carry out subsequent analysis, and the scattering parameter drawn by the signal of change detected is more scientific effectively；(2) frequency sweep is used
A variety of defect types and its size can be carried out detection by formula detection method, and testing result can be further to lacking
Sunken size is analyzed and judged, with more universality.
Brief description of the drawings
Fig. 1 is a kind of structural representation of embodiment for composite insulator defect non-destructive detecting device of the present invention.
Fig. 2 is scattering parameter schematic diagram calculation in the present invention.
Embodiment
In order that the purpose of the present invention, technical scheme and advantage are more clearly understood, the present invention is entered below in conjunction with accompanying drawing
Row further description, it will be appreciated that instantiation described herein only to explain the present invention, is not used to limit
The present invention.
A kind of composite insulator defect non-destructive detecting device of the present invention, including：
Microwave source, for providing microwave signal；
Waveguide, the microwave signal for the microwave source to be provided is conducted to object to be measured；
Coupling probe, for launching incoming signal and including the reflected signal of measured object, and by the incoming signal
Separated with reflected signal and be sent to receiver；
Receiver, for collecting the transmission signal of measured object and being sent to receiver；
Receiver, for receiving the incoming signal, reflected signal and transmission signal and being sent to analyzer；
Analyzer, calculates and analyzes to determine having for defect according to the incoming signal, reflected signal and transmission signal
The size of nothing and/or the estimation defect.
Further, the microwave signal that the microwave source is provided is variable-frequency microwave signal.
Further, the frequency range of the variable-frequency microwave signal is 4-30GHz, and stepped intervals are 0.1MHz.
Further, the composite insulator defect non-destructive detecting device includes the waveguide of at least two different sizes.
Embodiment 1
Fig. 1 is a kind of structural representation of embodiment of composite insulator defect non-destructive detecting device proposed by the present invention,
As illustrated, the composite insulator defect non-destructive detecting device includes microwave source 11, waveguide 12, coupling probe 13, receiver
14th, receiver 15 and analyzer 16.
Wherein, the microwave source 11 provides variable-frequency microwave signal, and frequency range is 4-30GHz, and stepped intervals are
0.1MHz, microwave band divides as follows：C-band 4-8GHz, X-band 8-12GHz, Ku wave band 12-18GHz, K-band 18-
27GHz, Ka wave band 27-40GHz.The present apparatus is used to realize that the core bands of defects detection function are 20-26GHz or so, therefore claims
" nearly K-band ", can select arbitrary continuation frequency sweep wave band in this interval when actually used；
The waveguide 12 is the conduction device of microwave sweep signal, for linking up microwave source 11 and coupling probe 13.
Because the frequency that various sizes of waveguide 12 can only conduct specific waveforms is located at the microwave signal of a certain frequency range, because
This is according to the difference of swept frequency range, the waveguide of the customizable different size of composite insulator non-destructive detecting device in this implementation
12, to ensure the normal conduction of swept-frequency signal.
Special coupling probe 13 is used in the present embodiment as incoming signal a1 transmitting probe and reflected signal b1
Probe is included, to measure.Coupling probe 13 is special coupling probe, and transmitting incoming signal can be met simultaneously, is connect
By reflected signal and the function that separates the two, it separates incoming signal a1 and reflected signal b1, and simultaneously by the two signals
Signal a and b is separated into be sent in receiver 15.
Receiver 14 is the spy for collecting the microwave sweep signal for being perforated through test specimen 21 (such as composite insulator)
Head, it is collected into transmission signal b2 and is sent to receiver 15 as signal c and waits further analysis.
Above-mentioned a signals are a1 signals, and b signals are b1 signals, and c signal is b2 signals, and coupling probe 13 is with receiving
Device 14 is only responsible for collecting in the process and transmits signal, does not change signal substance.
Receiver 15 is received after signal a, signal b, signal c, is sent to analyzer 16 and is calculated and analyzed.Receive
Machine 15 is not handled signal, only acts the function of receiving with transmission to 3 road signals.The input socket of analyzer 16 can not be with coupling
The output plug matching of probe 13, receiver 14 is closed, therefore adds receiver 15 and is collected and changes.
Signal a, signal b when analyzer 16 is according to frequency sweep at each frequency values, tri- signals of signal c, step are as follows：
(1) four scattering parameters S11, S12, S21 and the S22 of the test specimen 21 at the frequency are calculated, are counted
Calculate formula as follows：
Wherein, a1For incoming signal, a2For ambient noise signal, b1For reflected signal, b2For transmission signal.Fig. 2 is the reason
The abstract interpretation figure of opinion, wherein DUT is test specimen.Wherein ambient noise signal a2, the calibration phase before detection starts
It has been measured that, can have been read directly from database, without measuring again.
(2) scattering parameter of all frequencies is drawn and analyzed for transverse axis by frequency.
(3) according to the value of the abnormal frequency of scattering parameter, it is determined whether defective, and/or its size is estimated.
Embodiment described above only expresses one embodiment of the present invention, and it describes more specific and detailed, but not
Therefore the limitation to the scope of the claims of the present invention can be interpreted as.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (4)
1. a kind of composite insulator defect non-destructive detecting device, it is characterised in that including：
Microwave source, for providing microwave signal；
Waveguide, the microwave signal for the microwave source to be provided is conducted to object to be measured；
Coupling probe, for launching incoming signal and including the reflected signal of measured object, and by the incoming signal and instead
Penetrate Signal separator and be sent to receiver；
Receiver, for collecting the transmission signal of measured object and being sent to receiver；
Receiver, for receiving the incoming signal, reflected signal and transmission signal and being sent to analyzer；
Analyzer, calculated and analyzed according to the incoming signal, reflected signal and transmission signal with determine the presence or absence of defect and/
Or the size of the estimation defect.
2. composite insulator defect non-destructive detecting device according to claim 1, it is characterised in that the microwave source is provided
Microwave signal be variable-frequency microwave signal.
3. composite insulator defect non-destructive detecting device according to claim 2, it is characterised in that described variable-frequency micro-
The frequency range of ripple signal is 4-30GHz, and stepped intervals are 0.1MHz.
4. composite insulator defect non-destructive detecting device according to claim 2, it is characterised in that the composite insulator
Defect non-destructive detecting device includes the waveguide of at least two different sizes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710163603.7A CN106950228A (en) | 2017-03-20 | 2017-03-20 | A kind of composite insulator defect non-destructive detecting device |
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| CN201710163603.7A CN106950228A (en) | 2017-03-20 | 2017-03-20 | A kind of composite insulator defect non-destructive detecting device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449788A (en) * | 2017-08-03 | 2017-12-08 | 国网江苏省电力公司连云港供电公司 | A kind of used in composite insulator four-degree-of-freedom defect detection platform |
| CN107505337A (en) * | 2017-08-03 | 2017-12-22 | 国网江苏省电力公司连云港供电公司 | A kind of composite insulator defects detection microwave reflection signal characteristic database |
| CN108007943A (en) * | 2017-11-20 | 2018-05-08 | 福建师范大学福清分校 | Rectangular waveguide frequency sweep microwave imaging system and detection method based on matrix decomposition |
| CN109709111A (en) * | 2019-02-27 | 2019-05-03 | 江苏双汇电力发展股份有限公司 | Composite insulator ultra-wide band radio-frequency sensing intelligent fitting and its application method |
| CN109813733A (en) * | 2019-01-23 | 2019-05-28 | 浙江大学 | A kind of cereal moisture percentage on-line measurement device based on frequency sweep microwave penetration method |
| CN111474590A (en) * | 2020-05-06 | 2020-07-31 | 上海大学 | Non-contact electromagnetic detection system and method for dangerous liquid |
| CN111856190A (en) * | 2020-07-29 | 2020-10-30 | 国网河南省电力公司新乡供电公司 | Composite insulator defect detection method, device, equipment and system |
| CN114113152A (en) * | 2021-12-28 | 2022-03-01 | 北京西管安通检测技术有限责任公司 | Nondestructive testing system, and method and device for producing pipe |
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| CN103558234A (en) * | 2013-10-21 | 2014-02-05 | 广东电网公司电力科学研究院 | Method for detecting ageing of composite insulator umbrella skirt |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449788A (en) * | 2017-08-03 | 2017-12-08 | 国网江苏省电力公司连云港供电公司 | A kind of used in composite insulator four-degree-of-freedom defect detection platform |
| CN107505337A (en) * | 2017-08-03 | 2017-12-22 | 国网江苏省电力公司连云港供电公司 | A kind of composite insulator defects detection microwave reflection signal characteristic database |
| CN108007943A (en) * | 2017-11-20 | 2018-05-08 | 福建师范大学福清分校 | Rectangular waveguide frequency sweep microwave imaging system and detection method based on matrix decomposition |
| CN109813733A (en) * | 2019-01-23 | 2019-05-28 | 浙江大学 | A kind of cereal moisture percentage on-line measurement device based on frequency sweep microwave penetration method |
| CN109709111A (en) * | 2019-02-27 | 2019-05-03 | 江苏双汇电力发展股份有限公司 | Composite insulator ultra-wide band radio-frequency sensing intelligent fitting and its application method |
| CN109709111B (en) * | 2019-02-27 | 2021-03-30 | 江苏双汇电力发展股份有限公司 | Composite insulator ultra-wideband radio frequency sensing intelligent hardware and use method thereof |
| CN111474590A (en) * | 2020-05-06 | 2020-07-31 | 上海大学 | Non-contact electromagnetic detection system and method for dangerous liquid |
| CN111474590B (en) * | 2020-05-06 | 2021-06-08 | 上海大学 | Non-contact electromagnetic detection system and method for dangerous liquid |
| CN111856190A (en) * | 2020-07-29 | 2020-10-30 | 国网河南省电力公司新乡供电公司 | Composite insulator defect detection method, device, equipment and system |
| CN114113152A (en) * | 2021-12-28 | 2022-03-01 | 北京西管安通检测技术有限责任公司 | Nondestructive testing system, and method and device for producing pipe |
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Application publication date: 20170714 |