CN104568991A - Detection method for defects of compound insulator, equipment and system - Google Patents
Detection method for defects of compound insulator, equipment and system Download PDFInfo
- Publication number
- CN104568991A CN104568991A CN201410794719.7A CN201410794719A CN104568991A CN 104568991 A CN104568991 A CN 104568991A CN 201410794719 A CN201410794719 A CN 201410794719A CN 104568991 A CN104568991 A CN 104568991A
- Authority
- CN
- China
- Prior art keywords
- test point
- strength signal
- composite insulator
- microwave
- voltage strength
- 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
Landscapes
- Testing Relating To Insulation (AREA)
- Insulators (AREA)
Abstract
The embodiment of the invention provides a detection method for the defects of a compound insulator, equipment and a system. The detection method comprises the following steps of: controlling a microwave source to generate high-frequency microwave, conducting the generated high-frequency microwave to a tested point on the surface of the compound insulator to be tested; acquiring reflected wave of the tested point; according to the reflected wave, and obtaining a voltage intensity signal corresponding to the tested point; judging whether the voltage intensity signal corresponding to the tested point is in the preset voltage-deviation range, and judging whether the defects exist on the tested point according to the judgment result. The detection method, the equipment and the system provided by the embodiment of the invention have the advantages that since the compound insulator adopts a non-metal material, the penetrability of the high-frequency microwave in the non-metal material is strong, surface contact and a coupling agent are not needed and non-destructive detection for the defects in the compound insulator can be realized on the basis of the reflected wave, so that the convenience and the application range of detection are improved; and since the measurement result is not dependent on the temperature, the humidity and the sunshine condition of the ambient environment, the accuracy of the detection result is improved.
Description
Technical field
The embodiment of the present invention relates to technical field of electric power, particularly relates to a kind of detection method of defect of composite insulator, equipment and system.
Background technology
Composite insulator because its volume is little, lightweight, hydrophobic nature and excellent, the interior good insulation preformance of migration of hydrophobicity, physical strength is high and corona is little and electromagnetic interference (EMI) is little etc., and advantage is applied in electric system more and more widely, but still there is a small amount of composite insulator existing defects and cause the generation of accident, so be necessary the defect detecting composite insulator, therefore, the detection technique of the defect of composite insulator is arisen at the historic moment.
Composite insulator existing defects place can produce Leakage Current, and under the effect under alternating electric field, produces overheating.Existing Infrared Detection Method is generally overheating point or the overheating region of being detected composite insulator by thermal infrared imager, and the position of the composite insulator corresponding with described overheating point or overheating region is defined as existing defects, thus reach the object of the defect detecting composite insulator.
The defect that above-mentioned Infrared Detection Method exists is: due to the temperature of external environment, humidity, sunshine situation, the factors such as the pollution flashover of surface of composite insulator, rain dodge, birds droppings flashover and Leakage Current all can cause the change of the temperature of composite insulator, therefore affect the accuracy of testing result.Current existing lot of examples is but that composite insulator has overheating dissects not discovery relevant position existing defects.
Summary of the invention
The embodiment of the present invention provides a kind of detection method of defect of composite insulator, equipment and system, to improve the accuracy of the testing result of the defect of composite insulator.
First aspect, embodiments provides a kind of detection method of defect of composite insulator, comprising:
Control microwave source and produce high-frequency microwave, and the high-frequency microwave of generation is conducted to the test point of surface of composite insulator to be tested;
Obtain the reflection wave of described test point;
According to described reflection wave, obtain the voltage strength signal that described test point is corresponding;
Judge whether voltage strength signal corresponding to described test point is positioned at predeterminated voltage deviation range, and determine described test point whether existing defects according to judged result.
Second aspect, embodiments provides a kind of checkout equipment of defect of composite insulator, comprising:
Power supply, for providing direct-current working volts for following microwave source;
Microwave source, is connected with described power supply, for the direct-current working volts provided according to described power supply, produces high-frequency microwave;
Waveguide, the high-frequency microwave for being produced by described microwave source conducts to the test point of surface of composite insulator to be tested; Also for conducting the reflection wave of described test point;
Directional coupler, is arranged in described waveguide, for separating of the described reflection wave extracted in described waveguide, and the reflection wave of separation and Extraction is sent to following microwave detector;
Microwave detector, is connected with described directional coupler, for receiving the described reflection wave of separation and Extraction from described directional coupler, is converted to the voltage strength signal that described test point is corresponding;
Data collecting card, be connected with described microwave detector, for gathering voltage strength signal corresponding to described test point from described microwave detector, and voltage strength signal corresponding for described test point is sent to processor, judge to make processor whether voltage strength signal corresponding to described test point is positioned at predeterminated voltage deviation range, and determine described test point whether existing defects according to judged result.
The third aspect, embodiments provides a kind of detection system of defect of composite insulator, comprising:
The checkout equipment of the defect of the composite insulator that any embodiment of the present invention provides, for obtaining the voltage strength signal of the reflection wave of the test point of surface of composite insulator to be tested, and is sent to following processor by voltage strength signal corresponding for described test point;
Processor, is connected with the checkout equipment of the defect of described composite insulator, for judging whether voltage strength signal corresponding to described test point is positioned at predeterminated voltage deviation range, and determines described test point whether existing defects according to judged result.
The detection method of the defect of the composite insulator that the embodiment of the present invention provides, equipment and system, the high-frequency microwave that microwave source produces is conducted to the test point of surface of composite insulator to be tested, refraction and reflection is there is in high-frequency microwave at the test point place of surface of composite insulator to be tested, by judging whether the voltage strength signal that the reflection wave of test point is corresponding is positioned at predeterminated voltage deviation range, can detection test points whether existing defects.Because composite insulator adopts nonmetallic materials, and high-frequency microwave penetration capacity in nonmetallic materials is strong, do not need surface contact, do not need couplant, the Non-Destructive Testing of composite insulator inherent vice can be realized based on reflection wave, improve convenience and the range of application of detection; Due to measurement result do not rely on the temperature of external environment, humidity and sunshine situation, improve the accuracy of testing result.
Accompanying drawing explanation
In order to be illustrated more clearly in the present invention, introduce doing one to the accompanying drawing used required in the present invention simply below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The process flow diagram of the detection method of the defect of a kind of composite insulator that Fig. 1 a provides for the embodiment of the present invention one;
Fig. 1 b is the reading value extreme difference distribution plan of the voltage strength signal of reflection wave corresponding to each test point of reference surface of composite insulator that in the embodiment of the present invention one, example 1 and example 2 are suitable for;
The voltage strength signal distribution plots that in the example 1 that Fig. 1 c provides for the embodiment of the present invention one, each test point of surface of composite insulator to be tested is corresponding;
The voltage strength signal distribution plots that in the example 2 that Fig. 1 d provides for the embodiment of the present invention one, each test point of surface of composite insulator to be tested is corresponding;
In the example 2 that Fig. 1 e provides for the embodiment of the present invention one, composite insulator to be tested dissects along test circumference the dissection sectional view formed;
The structural representation of the checkout equipment of the defect of a kind of composite insulator that Fig. 2 provides for the embodiment of the present invention two;
The structural representation of the detection system of the defect of a kind of composite insulator that Fig. 3 provides for the embodiment of the present invention three.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, be described in further detail the technical scheme in the embodiment of the present invention below in conjunction with accompanying drawing, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Be understandable that; specific embodiment described herein is only for explaining the present invention; but not limitation of the invention; based on the embodiment in the present invention; those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not full content.
Embodiment one
Refer to Fig. 1 a, the process flow diagram of the detection method of the defect of a kind of composite insulator provided for the embodiment of the present invention one.
The method comprises: step 110 ~ step 140.
Step 110, control microwave source produce high-frequency microwave, and the high-frequency microwave of generation are conducted to the test point of surface of composite insulator to be tested.
In this step, the frequency of the high-frequency microwave that described microwave source produces can be more than 10GHz.The frequency positive correlation of the accuracy of detection of the defect of composite insulator and the high-frequency microwave of microwave source outgoing, also, the frequency of the high-frequency microwave of microwave source outgoing is higher, and the accuracy of detection of the defect of composite insulator is higher; The frequency of the high-frequency microwave of microwave source outgoing is lower, and the accuracy of detection of the defect of composite insulator is lower.
In this step, by waveguide, the high-frequency microwave that microwave source produces can be conducted to the test point of surface of composite insulator to be tested.The size of waveguide internal diameter is different because of the wavelength of institute's carry high frequency microwave, therefore can select the waveguide of suitable inner diameter according to the frequency of transmitted high-frequency microwave.
Wherein, before step 110, can the test point of chosen in advance surface of composite insulator to be tested.Preferably at first predetermined number crossing with described composite insulator of the plane perpendicular to composite insulator axis circumferentially, choose and respectively circumferentially second set the Along ent of quantity as described test point.
Step 120, obtain the reflection wave of described test point.
In this step, high-frequency microwave conducts to the test point of surface of composite insulator to be tested by waveguide, refraction and reflection can be there is in surface of composite insulator to be tested, a part for reflection wave transfers in waveguide, and the ripple specifically can propagated by negative sense by the directional coupler arranged in waveguide and reflection wave separation and Extraction are out.
Step 130, according to described reflection wave, obtain the voltage strength signal that described test point is corresponding.
Step 140, judge whether voltage strength signal corresponding to described test point is positioned at predeterminated voltage deviation range, and determine described test point whether existing defects according to judged result.
If this step voltage strength signal that specifically described test point is corresponding is positioned at predeterminated voltage deviation range, then determine described test point not existing defects; If voltage strength signal corresponding to described test point is positioned at outside predeterminated voltage deviation range, then determine described test point existing defects.Can by each test point of traversal, thus determine each test point of existing defects, also can after obtaining voltage strength signal corresponding to each test point, carry out parallel judgement, also namely parallelly judge whether voltage strength signal corresponding to each test point is positioned at predeterminated voltage deviation range, thus determine each test point of existing defects.
Before step 140, also comprise: perpendicular to three predetermined number crossing with described reference composite insulator of the plane with reference to composite insulator axis circumferentially, the voltage strength signal of the reflection wave that the Along ent of each circumferentially the 4th setting quantity of statistics is corresponding, obtains described predeterminated voltage deviation range.
Wherein, reference composite insulator is flawless composite insulator.
The technical scheme of the present embodiment, the high-frequency microwave that microwave source produces is conducted to the test point of surface of composite insulator to be tested, refraction and reflection is there is in high-frequency microwave at the test point place of surface of composite insulator to be tested, by judging whether the voltage strength signal that the reflection wave of test point is corresponding is positioned at predeterminated voltage deviation range, can detection test points whether existing defects.Because composite insulator adopts nonmetallic materials, and high-frequency microwave penetration capacity in nonmetallic materials is strong, do not need surface contact, do not need couplant, the Non-Destructive Testing of composite insulator inherent vice can be realized based on reflection wave, improve convenience and the range of application of detection; Due to measurement result do not rely on the temperature of external environment, humidity and sunshine situation, improve the accuracy of testing result.
Further preferably, according to described reflection wave, after obtaining voltage strength signal corresponding to described test point, described method can also comprise:
The voltage strength signal corresponding to described test point carries out low frequency and amplifies process;
Correspondingly, judge whether voltage strength signal corresponding to described test point is positioned at predeterminated voltage deviation range, and determine described test point whether existing defects according to judged result, be specially:
Judge whether amplify voltage strength signal corresponding to described test point after process through low frequency is positioned at predeterminated voltage deviation range, and determine described test point whether existing defects according to judged result.
The enlargement factor of low-frequency amplifier can be 50 to 100 times, signal before amplification is the order of magnitude of tens millivolts, easily be subject to the interference of spurious signal, have impact on the extraction of the voltage strength signal of reflection wave to a certain extent, and after being amplified by low-frequency amplifier, reduce the interference of spurious signal, be conducive to the voltage strength signal extracting reflection wave.
Be described below by example.
First, test point is chosen with reference to surface of composite insulator flawless, test point is distributed in this reference surface of composite insulator without 5 of full skirt position circumferentially, be specially perpendicular to reference to the plane of composite insulator axis crossing with described reference composite insulator 5 circumferentially, and circumferentially choose 24 Along ents as test point each, thus obtain 120 test points.
By direct supply for microwave source provides 6V DC voltage, controlling microwave source generation frequency is the high-frequency microwave of 24GHz, by successively by probe contacts to each 24 test points circumferentially, the high-frequency microwave of generation is conducted to the corresponding test point with reference to surface of composite insulator, add up the voltage strength signal of reflection wave corresponding to each circumferentially 24 test points respectively, obtain predeterminated voltage deviation range.
Refer to Fig. 1 b, horizontal ordinate is 5 test circumference, ordinate is the reading value of the voltage strength signal of reflection wave corresponding to each circumferentially 24 test points, unit is volt, can obtain, the reading value extreme difference of the voltage strength signal of the reflection wave that each circumferentially 24 test points are corresponding is distributed within the scope of 0.9V, according to actual needs, certain nargin can be reserved to this extreme difference scope, such as extreme difference scope is adjusted to 1V, using the mean value of the voltage strength signal of reflection wave corresponding for zero defect position as reference value initial point, thus obtain predeterminated voltage deviation range for this mean value ± 0.5V, in other words, predeterminated voltage deviation range near the mean value of the voltage strength signal of reflection wave corresponding to zero defect position ± scope of 0.5V in fluctuation, fluctuation deviation can be set as 100%, relative to during mean value skew more than 1V, the reading value of the voltage strength signal of the reflection wave that namely certain test point is corresponding can judge that the inside defectiveness of this test point place or correspondence exists.
Example 1
In this example, artificially having manufactured a series of diameter in composite insulator to be tested is the gas hole defect of 1mm, have detected 24 test points along this composite insulator to be tested circumferential surface, controlling microwave source generation frequency is the high-frequency microwave of 24GHz, and the high-frequency microwave of generation is conducted to 24 test points of this surface of composite insulator to be tested, obtain the reflection wave of each test point, obtain the voltage strength signal that each test point is corresponding, as illustrated in figure 1 c, wherein, horizontal ordinate is test point position, ordinate is the voltage strength signal of reflection wave corresponding to each test point, known, the voltage strength signal distributions of the reflection wave of zero defect position is in the scope of 4.0V ± 0.6V, the mean value of the voltage strength signal of the reflection wave of zero defect position is 4.0V, predeterminated voltage deviation range is 4.0V ± 0.6V, fluctuation deviation setting is 100%, relative to during mean value skew more than 1.2V, the reading value of the voltage strength signal of the reflection wave that namely test point is corresponding can judge that inner defectiveness exists, in this example, the voltage strength signal of the reflection wave of defective position relative to mean value beyond about 1.8V, be greater than 1.2V, so be determined with defect, reality also existing defects really.
Wherein, have the situation of inherent vice, the voltage strength information of the reflection wave of test point and the skew of mean value larger, then defect is larger.
Example 2
In this example, composite insulator to be tested is take from the composite insulator in the dark second line N46 tower of ridge, have detected 24 test points along this composite insulator to be tested circumferential surface, controlling microwave source generation frequency is the high-frequency microwave of 24GHz, and the high-frequency microwave of generation is conducted to 24 test points of this surface of composite insulator to be tested, obtain the reflection wave of each test point, obtain the voltage strength signal that each test point is corresponding, as shown in Figure 1 d, wherein, horizontal ordinate is test point position, ordinate is the voltage strength signal of reflection wave corresponding to each test point, known, the voltage strength signal distributions of the reflection wave of major part position is in the scope of 6.9V ± 0.5V, therefore the mean value of the voltage strength signal of the reflection wave of zero defect position is 6.9V, predeterminated voltage deviation range is 6.9V ± 0.5V, fluctuation deviation setting is 100%, relative to during mean value skew more than 1.0V, the reading value of the voltage strength signal of the reflection wave that namely test point is corresponding can judge that inner defectiveness exists, in this example, in the position of test point 17 and test point 18, the voltage strength signal of reflection wave has an obvious spike, its reading deviation average 1.1V, exceed 1.0V, testing result is test point 17 and test point 18 position defectiveness.In the example 2 that Fig. 1 e provides for the embodiment of the present invention one, composite insulator to be tested dissects along test circumference the dissection sectional view formed, can see that there is the interface damage of an electric current ablation formation position (corresponding to test point 17 and test point 18) in the plug lower left corner, through measuring, its degree of depth is approximately 0.4mm, is also the certain existing defects in position of test point 17 and test point 18.
It should be noted that, the jacket thickness of the corresponding different size of the composite insulator due to different model and diameter of mandrel, but the difference of the jacket thickness that the composite insulator of different model is corresponding and diameter of mandrel can not be large especially, and the formula components of the composite insulator of different manufacturers production is not exclusively the same, so the fluctuation range in the detection method of the defect of composite insulator that provides of the embodiment of the present invention near mean value and mean value can not depart from concrete composite insulator and determine, need to test on the same a collection of insulator that model is identical repeatedly could determine.But from great many of experiments, predeterminated voltage deviation range be the mean value of the voltage strength signal being roughly all reflection wave in zero defect position ± 0.5 or ± 0.6V within, fluctuation is too not large.
Embodiment two
Refer to Fig. 2, the structural representation of the checkout equipment of the defect of a kind of composite insulator provided for the embodiment of the present invention two.
This checkout equipment comprises: power supply 210, microwave source 220, waveguide 230, directional coupler 240, microwave detector 250 and data collecting card 260.
Wherein, power supply 210 is for providing direct-current working volts for microwave source 220; Microwave source 220 is connected with described power supply 210, for the direct-current working volts provided according to described power supply 210, produces high-frequency microwave; Waveguide 230 conducts to the test point of surface of composite insulator to be tested for the high-frequency microwave produced by described microwave source 220, also for conducting the reflection wave of described test point; Directional coupler 240 is arranged in described waveguide 230, for separating of the described reflection wave extracted in described waveguide, and the reflection wave of separation and Extraction is sent to microwave detector 250; Microwave detector 250 is connected with described directional coupler 240, for receiving the described reflection wave of separation and Extraction from described directional coupler 240, is converted to the voltage strength signal that described test point is corresponding; Data collecting card 260 is connected with described microwave detector 250, for gathering voltage strength signal corresponding to described test point from described microwave detector 250, and voltage strength signal corresponding for described test point is sent to processor, judge to make processor whether voltage strength signal corresponding to described test point is positioned at predeterminated voltage deviation range, and determine described test point whether existing defects according to judged result.
The technical scheme of the present embodiment, the high-frequency microwave produced by microwave source conducts to the test point of surface of composite insulator to be tested by waveguide, refraction and reflection is there is in high-frequency microwave at the test point place of surface of composite insulator to be tested, by the reflection wave in waveguide described in the directional coupler separation and Extraction that arranges in waveguide, be voltage strength signal corresponding to test point by reflected wave conversion by microwave detector, by judging whether the voltage strength signal that the reflection wave of test point is corresponding is positioned at predeterminated voltage deviation range, can detection test points whether existing defects.Because composite insulator adopts nonmetallic materials, and high-frequency microwave penetration capacity in nonmetallic materials is strong, do not need surface contact, do not need couplant, the Non-Destructive Testing of composite insulator inherent vice can be realized based on reflection wave, improve convenience and the range of application of detection; Due to measurement result do not rely on the temperature of external environment, humidity and sunshine situation, improve the accuracy of testing result.
In such scheme, the frequency of the high-frequency microwave that described microwave source 220 produces is preferably more than 10GHz.
In such scheme, described microwave source 220 can be Gunn oscillator.
In such scheme, described equipment also preferably includes: low-frequency amplifier, described microwave detector 250 is connected with described data collecting card 260 by described low-frequency amplifier, and voltage strength signal corresponding to the described test point that described low-frequency amplifier is used for being converted to described microwave detector carries out low frequency and amplify process; Described data collecting card 260 is specifically for amplifying voltage strength signal corresponding to the described test point after process from described low-frequency amplifier collection through low frequency, and voltage strength signal corresponding for described test point is sent to processor, judge to make processor whether voltage strength signal corresponding to described test point is positioned at predeterminated voltage deviation range, and determine described test point whether existing defects according to judged result.
The checkout equipment of the defect of the composite insulator that the embodiment of the present invention provides can perform the detection method of the defect of the composite insulator that any embodiment of the present invention provides, and possesses the corresponding functional module of manner of execution and beneficial effect.
Embodiment three
Refer to Fig. 3, the structural representation of the detection system of the defect of a kind of composite insulator provided for the embodiment of the present invention three.This detection system comprises: the checkout equipment 310 of the defect of the composite insulator provided as any embodiment of the present invention and processor 320.
Wherein, voltage strength signal corresponding for described test point for obtaining the voltage strength signal of the reflection wave of the test point of surface of composite insulator to be tested, and is sent to processor 320 by the checkout equipment 310 of the defect of described composite insulator; Processor 320 is connected with the checkout equipment 310 of the defect of described composite insulator, for judging whether voltage strength signal corresponding to described test point is positioned at predeterminated voltage deviation range, and determines described test point whether existing defects according to judged result.
Last it is noted that above each embodiment is only for illustration of technical scheme of the present invention, but not be limited; In embodiment preferred embodiment, be not limited, to those skilled in the art, the present invention can have various change and change.All do within spirit of the present invention and principle any amendment, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a detection method for the defect of composite insulator, is characterized in that, comprising:
Control microwave source and produce high-frequency microwave, and the high-frequency microwave of generation is conducted to the test point of surface of composite insulator to be tested;
Obtain the reflection wave of described test point;
According to described reflection wave, obtain the voltage strength signal that described test point is corresponding;
Judge whether voltage strength signal corresponding to described test point is positioned at predeterminated voltage deviation range, and determine described test point whether existing defects according to judged result.
2. method according to claim 1, is characterized in that, the frequency of the high-frequency microwave that described microwave source produces is more than 10GHz.
3. method according to claim 1, is characterized in that, according to described reflection wave, after obtaining voltage strength signal corresponding to described test point, described method also comprises:
The voltage strength signal corresponding to described test point carries out low frequency and amplifies process;
Judge whether voltage strength signal corresponding to described test point is positioned at predeterminated voltage deviation range, and determine described test point whether existing defects according to judged result, be specially:
Judge whether amplify voltage strength signal corresponding to described test point after process through low frequency is positioned at predeterminated voltage deviation range, and determine described test point whether existing defects according to judged result.
4. method according to claim 1, is characterized in that, produce high-frequency microwave, and before the high-frequency microwave of generation being conducted to the test point of surface of composite insulator to be tested, described method also comprises at control microwave source:
At first predetermined number crossing with described composite insulator to be tested of the plane perpendicular to composite insulator axis to be tested circumferentially, the Along ent of each circumferentially the second setting quantity is chosen as described test point.
5. according to the arbitrary described method of claim 1-4, it is characterized in that, before judging whether voltage strength signal corresponding to described test point is positioned at predeterminated voltage deviation range, described method also comprises:
Perpendicular to three predetermined number crossing with described reference composite insulator of the plane with reference to composite insulator axis circumferentially, the voltage strength signal of the reflection wave that the Along ent of each circumferentially the 4th setting quantity of statistics is corresponding, obtains described predeterminated voltage deviation range.
6. a checkout equipment for the defect of composite insulator, is characterized in that, comprising:
Power supply, for providing direct-current working volts for following microwave source;
Microwave source, is connected with described power supply, for the direct-current working volts provided according to described power supply, produces high-frequency microwave;
Waveguide, the high-frequency microwave for being produced by described microwave source conducts to the test point of surface of composite insulator to be tested; Also for conducting the reflection wave of described test point;
Directional coupler, is arranged in described waveguide, for separating of the described reflection wave extracted in described waveguide, and the reflection wave of separation and Extraction is sent to following microwave detector;
Microwave detector, is connected with described directional coupler, for receiving the described reflection wave of separation and Extraction from described directional coupler, is converted to the voltage strength signal that described test point is corresponding;
Data collecting card, be connected with described microwave detector, for gathering voltage strength signal corresponding to described test point from described microwave detector, and voltage strength signal corresponding for described test point is sent to processor, judge to make processor whether voltage strength signal corresponding to described test point is positioned at predeterminated voltage deviation range, and determine described test point whether existing defects according to judged result.
7. equipment according to claim 6, is characterized in that, the frequency of the high-frequency microwave that described microwave source produces is more than 10GHz.
8. equipment according to claim 7, is characterized in that, described microwave source is Gunn oscillator.
9. according to the arbitrary described equipment of claim 6-8, it is characterized in that, described equipment also comprises: low-frequency amplifier, described microwave detector is connected with described data collecting card by described low-frequency amplifier, and voltage strength signal corresponding to the described test point that described low-frequency amplifier is used for being converted to described microwave detector carries out low frequency amplification and process;
Described data collecting card, specifically for amplifying voltage strength signal corresponding to the described test point after process from described low-frequency amplifier collection through low frequency, and voltage strength signal corresponding for described test point is sent to processor, judge to make processor whether voltage strength signal corresponding to described test point is positioned at predeterminated voltage deviation range, and determine described test point whether existing defects according to judged result.
10. a detection system for the defect of composite insulator, is characterized in that, comprising:
The checkout equipment of the defect of the composite insulator as described in as arbitrary in claim 6-9, for obtaining the voltage strength signal of the reflection wave of the test point of surface of composite insulator to be tested, and is sent to following processor by voltage strength signal corresponding for described test point;
Processor, is connected with the checkout equipment of the defect of described composite insulator, for judging whether voltage strength signal corresponding to described test point is positioned at predeterminated voltage deviation range, and determines described test point whether existing defects according to judged result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410794719.7A CN104568991A (en) | 2014-12-18 | 2014-12-18 | Detection method for defects of compound insulator, equipment and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410794719.7A CN104568991A (en) | 2014-12-18 | 2014-12-18 | Detection method for defects of compound insulator, equipment and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104568991A true CN104568991A (en) | 2015-04-29 |
Family
ID=53085555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410794719.7A Pending CN104568991A (en) | 2014-12-18 | 2014-12-18 | Detection method for defects of compound insulator, equipment and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104568991A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950228A (en) * | 2017-03-20 | 2017-07-14 | 国网江苏省电力公司连云港供电公司 | A kind of composite insulator defect non-destructive detecting device |
| CN106950227A (en) * | 2017-03-20 | 2017-07-14 | 国网江苏省电力公司连云港供电公司 | A kind of composite insulator defect lossless detection method |
| 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 |
| CN107807315A (en) * | 2017-10-31 | 2018-03-16 | 国网安徽省电力公司电力科学研究院 | Testing device for insulation defect and method for electrical equipment |
| CN108760814A (en) * | 2018-06-21 | 2018-11-06 | 湖南湖大华龙电气与信息技术有限公司 | A kind of composite insulator is infrared to combine intelligent detecting method and its device with millimeter wave |
| CN108801970A (en) * | 2018-06-11 | 2018-11-13 | 清华大学深圳研究生院 | The detection method of support insulator boundary defect and interface state |
| CN110827270A (en) * | 2019-11-12 | 2020-02-21 | 南方电网科学研究院有限责任公司 | Composite insulator defect diagnosis method and system |
| CN111160315A (en) * | 2020-01-03 | 2020-05-15 | 云南电网有限责任公司电力科学研究院 | Method and device for acquiring inherent frequency band of post insulator |
| 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 |
| CN116124801A (en) * | 2023-04-14 | 2023-05-16 | 中建六局建设发展有限公司 | Nondestructive testing method and system for steel structure |
| CN116858861A (en) * | 2023-09-04 | 2023-10-10 | 国网江苏省电力有限公司常州供电分公司 | Method and device for detecting composite insulator |
| CN117953401A (en) * | 2024-03-26 | 2024-04-30 | 国网浙江省电力有限公司电力科学研究院 | Automatic identification method and system for complex background infrared image composite insulator heating defects |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204536226U (en) * | 2014-12-18 | 2015-08-05 | 中国南方电网有限责任公司超高压输电公司天生桥局 | The checkout equipment of the defect of composite insulator and system |
-
2014
- 2014-12-18 CN CN201410794719.7A patent/CN104568991A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204536226U (en) * | 2014-12-18 | 2015-08-05 | 中国南方电网有限责任公司超高压输电公司天生桥局 | The checkout equipment of the defect of composite insulator and system |
Non-Patent Citations (3)
| Title |
|---|
| B. LUTZ ET AL: "Microwave-based detection of internal defects in composite insulators for outdoor application", 《2012 IEEE INTERNATIONAL CONFERENCE ON CONDITION MONITORING AND DIAGNOSIS》 * |
| NASSER N. QADDOUMI ET AL: "Outdoor Insulators Testing Using Artificial Neural Network-Based Near-Field Microwave Technique", 《IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT》 * |
| NASSER QADDOUMI ET AL: "Detecting Defects in Outdoor Non-ceramic Insulators using Near-field Microwave Non-destructive Testing", 《IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION》 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950227A (en) * | 2017-03-20 | 2017-07-14 | 国网江苏省电力公司连云港供电公司 | A kind of composite insulator defect lossless detection method |
| CN106950228A (en) * | 2017-03-20 | 2017-07-14 | 国网江苏省电力公司连云港供电公司 | A kind of composite insulator defect non-destructive detecting device |
| 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 |
| CN107807315B (en) * | 2017-10-31 | 2023-12-19 | 国网安徽省电力公司电力科学研究院 | Method for detecting insulation defects of electrical equipment |
| CN107807315A (en) * | 2017-10-31 | 2018-03-16 | 国网安徽省电力公司电力科学研究院 | Testing device for insulation defect and method for electrical equipment |
| CN108801970A (en) * | 2018-06-11 | 2018-11-13 | 清华大学深圳研究生院 | The detection method of support insulator boundary defect and interface state |
| CN108760814A (en) * | 2018-06-21 | 2018-11-06 | 湖南湖大华龙电气与信息技术有限公司 | A kind of composite insulator is infrared to combine intelligent detecting method and its device with millimeter wave |
| CN110827270A (en) * | 2019-11-12 | 2020-02-21 | 南方电网科学研究院有限责任公司 | Composite insulator defect diagnosis method and system |
| CN110827270B (en) * | 2019-11-12 | 2022-10-28 | 南方电网科学研究院有限责任公司 | Composite insulator defect diagnosis method and system |
| CN111160315A (en) * | 2020-01-03 | 2020-05-15 | 云南电网有限责任公司电力科学研究院 | Method and device for acquiring inherent frequency band of post insulator |
| CN111160315B (en) * | 2020-01-03 | 2023-05-05 | 云南电网有限责任公司电力科学研究院 | Method and device for acquiring intrinsic frequency band of post insulator |
| 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 |
| CN116124801A (en) * | 2023-04-14 | 2023-05-16 | 中建六局建设发展有限公司 | Nondestructive testing method and system for steel structure |
| CN116858861A (en) * | 2023-09-04 | 2023-10-10 | 国网江苏省电力有限公司常州供电分公司 | Method and device for detecting composite insulator |
| CN117953401A (en) * | 2024-03-26 | 2024-04-30 | 国网浙江省电力有限公司电力科学研究院 | Automatic identification method and system for complex background infrared image composite insulator heating defects |
| CN117953401B (en) * | 2024-03-26 | 2024-06-25 | 国网浙江省电力有限公司电力科学研究院 | Automatic identification method and system for complex background infrared image composite insulator heating defects |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104568991A (en) | Detection method for defects of compound insulator, equipment and system | |
| CN204536226U (en) | The checkout equipment of the defect of composite insulator and system | |
| Miao et al. | Online defect recognition of narrow overlap weld based on two-stage recognition model combining continuous wavelet transform and convolutional neural network | |
| CN103645243B (en) | Electromagnetic nondestructive detection system for power transmission line | |
| CN104965023B (en) | Multi-modal guided wave industrial pipeline diagnostic method | |
| CN103163211B (en) | A kind of metallic conductor surface and subsurface defect classifying identification method | |
| CN104964886A (en) | Welded member fatigue stress and strain real-time non-contact type monitoring method | |
| CN104407049A (en) | Micro-crack nondestructive detection system and detection method thereof | |
| CN107367482B (en) | Method for detecting nondestructive of composite material of power equipment | |
| CN104807883A (en) | Detection method of grouting compactness entity of wall | |
| CN108387609A (en) | A kind of method, apparatus of non-destructive testing, device-readable storage medium | |
| CN103837497A (en) | Device for detecting moisture content of lubricating oil and detection method thereof | |
| CN104035007A (en) | Short-air-gap breakdown prewarning method of high-voltage electrical equipment | |
| Soomro et al. | Study on different techniques of partial discharge (PD) detection in power transformers winding: Simulation between paper and EPOXY resin using UHF method | |
| CN104849635A (en) | Partial discharge positioning system based on ultrasonic sensor array | |
| CN114577906A (en) | Positive corrosion foil micro-perforation defect ultrasonic guided wave detection method and system | |
| Harshitha et al. | Damage detection of structural members using internet of things (IoT) paradigm | |
| CN201464577U (en) | Electric field strength acquisition device and fault detection device for composite insulator | |
| CN113418986A (en) | Voiceprint detection system for bridge tunnel | |
| CN103995041B (en) | Based on the Non-Destructive Testing imaging device of capacitance coupling effect | |
| CN105372328A (en) | Detection device and method | |
| CN109342566A (en) | A kind of disc insulator defects detection positioning device and method based on supersonic guide-wave | |
| CN103115961A (en) | Waterproof coil overlap joint seam quality detection method and instrument based on B ultrasounds | |
| CN109444255A (en) | A kind of diagnostic method of carbon fibre reinforced composite defect | |
| CN203479963U (en) | Cable partial discharge detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |
|
| RJ01 | Rejection of invention patent application after publication |