CN110320272B - Method for detecting junction surface of central conductor and epoxy piece of three-post insulator - Google Patents
Method for detecting junction surface of central conductor and epoxy piece of three-post insulator Download PDFInfo
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- CN110320272B CN110320272B CN201910521036.7A CN201910521036A CN110320272B CN 110320272 B CN110320272 B CN 110320272B CN 201910521036 A CN201910521036 A CN 201910521036A CN 110320272 B CN110320272 B CN 110320272B
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- 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
- G01N29/04—Analysing solids
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- 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
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2437—Piezoelectric probes
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- 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
- G01N29/4454—Signal recognition, e.g. specific values or portions, signal events, signatures
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- 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
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- 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
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
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- 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
- G01N2291/04—Wave modes and trajectories
- G01N2291/042—Wave modes
- G01N2291/0421—Longitudinal waves
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- 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
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
Abstract
The invention discloses a method for detecting a junction surface of a center conductor and an epoxy piece of a three-post insulator, which comprises the following steps: s1, building an ultrasonic detection system; s2, detecting the standard component by an ultrasonic detection system; s3, detecting the three-post insulator by an ultrasonic detection system; and S4, recording a reflection echo peak value on an oscilloscope in the detection process, and judging whether a gap exists on the joint surface of the central conductor and the epoxy piece at the detection position. The invention has the advantages of low detection cost, high detection precision, convenient carrying, no radiation to human bodies and the like, and can be used for delivery detection of the GIL three-post insulator and assembly field detection of the GIL three-post insulator.
Description
Technical Field
The invention relates to the field of power transmission and transformation insulating equipment, in particular to a method for detecting a joint surface of a central conductor and an epoxy piece of a three-post insulator.
Background
Three-post insulators are important electrical components in gas insulated metal enclosed transmission lines (GIL) and are mainly used for supporting internal energized conductors and insulating high-voltage conductor portions from low-voltage housing portions. The performance of the three-post insulator directly affects whether the GIL can stably and reliably operate for a long time. In the production process of the three-post insulator, if the quality control of the casting process is not good, the joint surface of the epoxy piece and the central conductor of the insulator has the defects of gaps, untight combination and the like, so that the electric field in the insulator is not uniformly distributed in the practical application process, the phenomena of local discharge, abnormal heating of the insulator and the like are caused, the aging of the insulator is accelerated, the performance of the insulator is reduced, and the normal operation of the GIL is directly threatened. Therefore, whether a gap exists on the joint surface of the three-post insulator epoxy piece and the central conductor or not is confirmed as soon as possible, and the method has important significance for guaranteeing safe operation of a power system.
At present, the defect detection of the three-post insulator for the GIL occurs in a factory test stage, an industrial digital X-ray imaging technology is generally adopted, the technology has the advantages of high detection precision and detection efficiency, and the defects of high price of an industrial X-ray imaging machine, harm to personal safety caused by X-ray radiation, incapability of detecting the insulator in an assembly field process and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for detecting a joint surface of a central conductor and an epoxy piece of a three-post insulator. The invention belongs to an ultrasonic longitudinal wave reflection detection method, has low detection cost, high detection precision, convenient carrying and no radiation hazard to human bodies, can be used for factory detection of three-post insulators and can also be applied to assembly field detection of the three-post insulators.
The purpose of the invention can be realized by the following technical scheme:
a method for detecting a joint surface of a center conductor and an epoxy piece of a three-post insulator comprises the following steps:
s1, building an ultrasonic detection system;
s2, detecting the standard component by an ultrasonic detection system;
s3, detecting the three-post insulator by an ultrasonic detection system;
and S4, recording a reflection echo peak value on an oscilloscope in the detection process, and judging whether a gap exists on the joint surface of the central conductor and the epoxy piece at the detection position.
The specific construction method of the ultrasonic detection system comprises the following steps: the strip-shaped longitudinal wave ultrasonic probe is connected with the emitting end of the ultrasonic pulse generation and receiving instrument through a probe connecting wire, and the synchronous end of the ultrasonic pulse generation and receiving instrument is connected with the oscilloscope through a signal transmission wire.
Specifically, the detection method for the standard part comprises the following steps: starting an ultrasonic detection system, adjusting an ultrasonic pulse generation receiver, placing a narrow strip-shaped longitudinal wave ultrasonic probe on a metal layer of a standard part, and recording the peak amplitude of an echo signal of an oscilloscope.
Specifically, the method for detecting the three-post insulator comprises the following steps: the strip-shaped longitudinal wave ultrasonic probe is placed on the inner wall of a central conductor of the three-post insulator, an ultrasonic detection system is started, the strip-shaped longitudinal wave ultrasonic probe makes tangential circular motion along the inner wall of the central conductor, detection of a current circumferential junction surface is completed after displacement for a circle, then the probe is axially moved for one probe bottom surface length along the center of the central conductor, new circumferential detection is performed, and the displacement of the probe covers the whole inner wall of the central conductor.
Specifically, in order to increase the coupling effect, a small amount of engine oil or transformer oil is coated on the bottom surface of the probe.
Specifically, the gap determination method includes: if the reflection echo peak value at a certain position of the inner wall of the central conductor is larger than the reflection echo peak value detected by the standard component, the fact that a gap exists between the joint surface of the central conductor and the epoxy component at the detection position can be shown.
Specifically, the standard part is composed of an epoxy layer and a metal layer which are made of the same materials and have the same manufacturing process as the three-post insulator, the interface of the epoxy layer and the metal layer of the standard part is free of gaps and is well combined, the thickness of the metal layer is the same as that of a central conductor of the three-post insulator, and a reflection echo peak value obtained by detecting the standard part through an ultrasonic detection system can be used as a reflection echo peak value when no gap exists between the joint surface of the central conductor of the three-post insulator and the epoxy part.
The method for detecting the junction surface of the central conductor and the epoxy piece of the three-post insulator utilizes an ultrasonic detection system to detect the junction surface of the central conductor and the epoxy piece of the three-post insulator, and the ultrasonic detection system comprises an ultrasonic pulse generation receiver, an oscilloscope, a strip-shaped longitudinal wave ultrasonic probe, a probe connecting wire and a signal transmission wire.
Furthermore, the ultrasonic pulse generation receiver is a pulse generation receiver with negative square wave excitation, adjustable square wave amplitude and width, low noise response and adjustable gain, a transmitting circuit of the ultrasonic pulse generation receiver consists of a high-performance square wave pulse generator and an advanced high-voltage circuit, and a receiving circuit has extremely low noise and a wider frequency band, so that the high quality of ultrasonic generation and receiving signals is ensured.
Furthermore, the oscilloscope is a four-channel high-performance digital storage oscilloscope with the bandwidth of 200MHz, the maximum sampling rate of 1GS/s and high input impedance, the signal output ends of the input channel of the oscilloscope and the ultrasonic pulse generation receiver are connected with the electric potential through a signal transmission line, and the received ultrasonic signals are displayed on the oscilloscope in real time.
The narrow strip-shaped longitudinal wave ultrasonic probe belongs to a longitudinal wave piezoelectric contact type straight probe, a rectangular composite material piezoelectric wafer is adopted, and the bottom surface of the probe is a plane rectangle; considering that the central conductor of the insulator is of a circular ring structure, and the inner wall of the central conductor is an arc surface, in order to improve the detection precision, the probe is designed to be in a narrow strip shape.
The probe connecting wire is a signal wire matched with the ultrasonic pulse generation receiver and the strip-shaped longitudinal wave ultrasonic probe, has the characteristics of low noise, strong anti-interference capability and the like, ensures that an output electric signal of the ultrasonic pulse generation receiver can be received by the strip-shaped longitudinal wave ultrasonic probe in high quality, and simultaneously ensures that an electric signal converted from the ultrasonic signal received by the strip-shaped longitudinal wave ultrasonic probe returns to a receiving end of the ultrasonic pulse generation receiver in high quality.
The signal line transmission line is a transmission line with small stray inductance and resistance, phase delay of high-frequency signals in the transmission process is shortened, real-time identical potential and same phase of electric signals received by the oscilloscope and electric signals at the signal output end of the ultrasonic pulse generation receiver are guaranteed, detection errors are greatly reduced, and detection precision is guaranteed.
The strip-shaped longitudinal wave ultrasonic probe adopts a plane wave straight probe, the smaller the width (W) of the bottom surface of the probe is, the higher the contact quality of the strip-shaped longitudinal wave ultrasonic probe and the inner wall of the central conductor is, and the less noise waves are generated in the detection process; the design range of the width (W) of the bottom surface of the probe is 5-10mm, the design range of the length (L) of the bottom surface of the probe is 20-35mm, and the design range of the height (H) of the probe is 15-20mm by comprehensively considering the manufacturing process, the cost and the curvature of the inner wall of the central conductor.
The higher the frequency of the strip-shaped longitudinal wave ultrasonic probe is, the larger the attenuation coefficient of the detected material is, the poorer the sound beam propagation characteristic effect is, and the frequency design of the strip-shaped longitudinal wave ultrasonic probe is not more than 2.5MHz by combining with the practical measurement experience.
The ultrasonic detection system is suitable for a three-post insulator, wherein the three-post insulator comprises an epoxy piece and a central conductor; the epoxy includes three columns; the central conductor is of an aluminum circular structure, and the thickness and the size of the central conductor are changed along with the change of the GIL voltage level.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, whether a gap exists on the joint surface of the central conductor of the three-post insulator and the epoxy piece can be judged by comparing the reflection echo peak values. The invention has the advantages of low detection cost, high detection precision, convenient carrying, no radiation to human bodies and the like, and can be used for delivery detection of the three-post insulator and assembly field detection of the three-post insulator.
Drawings
FIG. 1 is a schematic view of a system for detecting a junction surface between a center conductor and an epoxy member of a three-post insulator;
fig. 2 is a schematic structural diagram of a narrow strip-shaped longitudinal wave ultrasonic probe in the embodiment: wherein, (a) is a front view of the strip-shaped longitudinal wave ultrasonic probe, (b) is a side view of the strip-shaped longitudinal wave ultrasonic probe, and (c) is a bottom view of the strip-shaped longitudinal wave ultrasonic probe;
FIG. 3 is a schematic diagram of the moving path of the narrow strip-shaped longitudinal ultrasonic probe in this embodiment;
FIG. 4 is a schematic diagram of a detection standard component of the ultrasonic detection system in this embodiment;
fig. 5 is a schematic diagram illustrating operation steps of a method for detecting a junction surface between a center conductor and an epoxy member of a three-post insulator according to this embodiment.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
Examples
In the embodiment, as shown in fig. 1, the ultrasonic detection system comprises an ultrasonic pulse generation receiver (1), an oscilloscope (2), a strip-shaped longitudinal wave ultrasonic probe (3), a probe connecting wire (4) and a signal transmission wire (5), and the system is used for detecting a three-post insulator (6).
The narrow strip-shaped longitudinal wave ultrasonic probe is connected with the sending end of the ultrasonic pulse generation and receiving instrument through a probe connecting wire, and the oscilloscope is connected with the synchronous end of the ultrasonic pulse generation and receiving instrument through a signal transmission wire.
The three-post insulator (6) comprises an epoxy piece (61) and a central conductor (62); the epoxy comprises three cylinders; the central conductor is of an aluminum annular structure, and the thickness and the size of the central conductor are changed along with the change of the GIL voltage level.
As shown in fig. 2, the narrow strip-shaped longitudinal ultrasonic probe (3) is a longitudinal piezoelectric contact type straight probe. Considering that the insulator central conductor (62) is of a circular ring structure and the inner wall is an arc surface, in order to improve the detection precision, the probe is designed to be in a narrow strip shape; the piezoelectric wafer (31) is made of rectangular composite materials, and the bottom surface (32) of the probe is in a plane rectangle shape.
The strip-shaped longitudinal wave ultrasonic probe adopts a plane wave straight probe, the smaller the width (W) of the bottom surface of the probe is, the higher the contact quality of the strip-shaped longitudinal wave ultrasonic probe and the inner wall of the central conductor is, and the less noise waves are generated in the detection process; considering the manufacturing process, cost and curvature of the inner wall of the central conductor comprehensively, in this embodiment, the design range of the width (W) of the bottom surface of the probe is 5-10mm, the design range of the length (L) of the bottom surface of the probe is 20-35mm, and the design range of the height (H) of the probe is 15-20 mm.
The higher the frequency of the strip-shaped longitudinal wave ultrasonic probe is, the larger the attenuation coefficient of the detected material is, the poorer the sound beam propagation characteristic effect is, and the frequency design of the strip-shaped longitudinal wave ultrasonic probe is not more than 2.5MHz by combining with the practical measurement experience.
As shown in fig. 3, when the ultrasonic detection system starts to detect the three-post insulator (6), the strip-shaped longitudinal wave ultrasonic probe is placed on the inner wall of the central conductor of the three-post insulator, and a little engine oil or transformer oil is smeared on the bottom surface of the probe in order to increase the coupling effect; the ultrasonic wave emitted by the strip-shaped longitudinal wave ultrasonic probe vertically enters the central conductor and then is transmitted to the joint surface of the central conductor and the epoxy piece, when a gap exists between the joint surface of the central conductor and the epoxy piece, the reflection and the transmission of the ultrasonic wave are strengthened and weakened, the reflection echo wave received by the strip-shaped longitudinal wave ultrasonic probe is more than that received without the gap, and the echo peak value displayed by an oscilloscope is enlarged.
In the detection process of the present embodiment, the influence of the surface roughness of the central conductor on the propagation characteristics of the ultrasonic sound beam is ignored.
As shown in fig. 3, in the process of detecting a three-post insulator by an ultrasonic detection system, a detection path of the narrow strip-shaped longitudinal wave ultrasonic probe firstly makes tangential (tangential) circular motion along the inner wall of the central conductor, and the detection of the current circumferential joint surface is completed after displacement for one circle; then, the strip-shaped longitudinal wave ultrasonic probe is moved along the central axial direction (axial) of the central conductor by the length of the bottom surface of the probe, and a new circumference detection is carried out until the displacement of the strip-shaped longitudinal wave ultrasonic probe covers the whole inner wall surface of the central conductor.
The defect judging method refers to a method for judging the existence of a gap on the joint surface of the three-post insulator epoxy piece and the central conductor, and comprises the following steps: firstly, the size of a reflection echo peak value of a standard part is obtained, namely an ultrasonic detection system is adopted to detect the standard part to obtain the reflection echo peak value, then ultrasonic detection is carried out on a junction surface of the three-post insulator and the central conductor according to the detection method, and if the reflection echo peak value detected at a certain position of the inner wall of the central conductor is larger than the reflection echo peak value of the standard part, a gap exists between the epoxy part and the junction surface of the central conductor at the detection position.
The standard part (7) is composed of an epoxy layer (72) and a metal layer (71) which are made of the same materials and have the same manufacturing process as the three-post insulator, as shown in figure 4, the joint surface of the epoxy layer and the metal layer of the standard part has no gap and is well combined, the thickness of the metal layer is the same as that of the central conductor of the three-post insulator, and the reflection echo peak value obtained by detecting the standard part through an ultrasonic detection system can be used as the reflection echo peak value when the joint surface of the central conductor and the epoxy part of the three-post insulator is seamless.
Fig. 5 is a flowchart of a method for detecting a junction surface between a center conductor and an epoxy member of a three-post insulator, the method comprising the steps of:
s1, building an ultrasonic detection system;
the specific construction method of the ultrasonic detection system comprises the following steps: the strip-shaped longitudinal wave ultrasonic probe is connected with the emitting end of the ultrasonic pulse generation and receiving instrument through a probe connecting wire, and the synchronous end of the ultrasonic pulse generation and receiving instrument is connected with the oscilloscope through a signal transmission wire;
s2, detecting the standard component by an ultrasonic detection system;
specifically, the detection method for the standard part comprises the following steps: starting an ultrasonic detection system, adjusting an ultrasonic pulse generation receiver, placing a narrow strip-shaped longitudinal wave ultrasonic probe coated with a little engine oil or transformer oil on a metal layer of a standard part, and recording the peak amplitude of an echo signal of an oscilloscope;
s3, detecting the GIL three-post insulator by an ultrasonic detection system;
specifically, the method for detecting the GIL three-post insulator comprises the following steps: placing a strip-shaped longitudinal wave ultrasonic probe coated with a little engine oil or transformer oil on the inner wall of a central conductor of the GIL three-post insulator, starting an ultrasonic detection system, making the strip-shaped longitudinal wave ultrasonic probe perform tangential circular motion along the inner wall of the central conductor, completing detection of a current circumferential junction surface after shifting for a circle, then axially moving the probe along the center of the central conductor for a probe bottom surface length, and performing new circumferential detection until the displacement of the probe covers the whole inner wall of the central conductor;
and S4, recording a reflection echo peak value on an oscilloscope in the detection process, and judging whether a gap exists on the joint surface of the central conductor and the epoxy piece at the detection position.
Specifically, the judging method comprises the following steps: if the reflection echo peak value at a certain position of the inner wall of the central conductor is larger than the reflection echo peak value detected by the standard component, the fact that a gap exists between the joint surface of the central conductor and the epoxy component at the detection position can be shown.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (7)
1. A method for detecting a joint surface of a center conductor and an epoxy piece of a three-post insulator is characterized by comprising the following steps:
s1, building an ultrasonic detection system;
s2, detecting the standard component by an ultrasonic detection system;
s3, detecting the three-post insulator by an ultrasonic detection system;
s4, recording a reflection echo peak value on an oscilloscope in the detection process, and judging whether a gap exists on the joint surface of the central conductor and the epoxy piece at the detection position;
the ultrasonic detection system detects the standard component, and specifically comprises the following steps: starting an ultrasonic detection system, adjusting an ultrasonic pulse generation receiver, placing a narrow strip-shaped longitudinal wave ultrasonic probe on a metal layer of a standard part, and recording the peak amplitude of an echo signal of an oscilloscope;
the ultrasonic detection system is used for detecting the three-post insulator and specifically comprises the following steps: placing a strip-shaped longitudinal wave ultrasonic probe on the inner wall of a central conductor of a three-pillar insulator, starting an ultrasonic detection system, making the strip-shaped longitudinal wave ultrasonic probe perform tangential circumferential motion along the inner wall of the central conductor, completing detection of a current circumferential junction surface after one-circle displacement, then axially moving the probe along the center of the central conductor for one probe bottom surface length, and performing new circumferential detection until the displacement of the probe covers the whole inner wall of the central conductor;
whether a gap exists between the joint surface of the central conductor and the epoxy piece at the detection position is judged, and the method specifically comprises the following steps: and if the reflection echo peak value at a certain position of the inner wall of the central conductor is greater than the reflection echo peak value detected by the standard component, indicating that a gap exists between the joint surface of the central conductor and the epoxy component at the detection position.
2. The method for detecting the junction surface of the center conductor and the epoxy part of the three-post insulator according to claim 1, wherein the ultrasonic detection system comprises an ultrasonic pulse generator, an oscilloscope, a strip-shaped longitudinal ultrasonic probe, a probe connecting wire and a signal transmission wire;
the strip-shaped longitudinal wave ultrasonic probe is connected with the emitting end of the ultrasonic pulse generation and receiving instrument through a probe connecting wire, and the synchronous end of the ultrasonic pulse generation and receiving instrument is connected with the oscilloscope through a signal transmission wire.
3. The method for detecting the joint surface of the center conductor and the epoxy member of the three-post insulator according to claim 1 or 2, wherein a small amount of engine oil or transformer oil is applied to the bottom surface of the probe to increase the coupling effect.
4. The method as claimed in claim 2, wherein the ultrasonic pulse generator receiver is a negative square-wave excitation, square-wave amplitude and width adjustable pulse generator receiver with low noise response and adjustable gain.
5. The method for detecting the junction surface of the center conductor and the epoxy part of the three-post insulator according to claim 2, wherein the oscilloscope is a four-channel high-performance digital storage oscilloscope with a bandwidth of 200MHz, a maximum sampling rate of 1GS/s and high input impedance.
6. The method for detecting the joint surface of the central conductor and the epoxy member of the three-post insulator according to claim 2, wherein the narrow strip-shaped longitudinal ultrasonic probe belongs to a longitudinal wave piezoelectric type contact straight probe, a rectangular composite piezoelectric wafer is adopted, and the bottom surface of the probe is a plane rectangle; the probe is designed to be in a narrow strip shape.
7. The method for detecting the joint surface of the center conductor and the epoxy member of the three-post insulator according to claim 6, wherein the narrow strip-shaped longitudinal ultrasonic probe adopts a plane wave straight probe, the design range of the width of the bottom surface of the probe is 5-10mm, the design range of the length of the bottom surface of the probe is 20-35mm, and the design range of the height of the probe is 15-20 mm; the frequency of the narrow strip-shaped longitudinal wave ultrasonic probe is not more than 2.5 MHz.
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| CN111426412B (en) * | 2020-04-26 | 2021-05-14 | 华南理工大学 | Annular stress sensing device for GIL three-post insulator and detection method |
| CN112034040A (en) * | 2020-08-12 | 2020-12-04 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Defect detection method, device and system for column base of three-column insulator |
| CN112066920A (en) * | 2020-08-31 | 2020-12-11 | 南方电网科学研究院有限责任公司 | Method and device for detecting strain of three-post insulator column foot and medium |
| CN112630611B (en) * | 2020-12-14 | 2022-04-22 | 华南理工大学 | Test method for detecting uniformity of basin-type insulator by ultrasonic longitudinal wave reflection method |
| CN113310610B (en) * | 2020-12-31 | 2022-12-16 | 华南理工大学 | Ultrasonic detection method for peripheral epoxy stress of three-post insulator insert |
| CN113639912A (en) * | 2021-07-30 | 2021-11-12 | 华南理工大学 | Method, device and system for detecting column leg stress under radial load of three-column insulator |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897776A (en) * | 2015-06-16 | 2015-09-09 | 国网山东省电力公司聊城供电公司 | Vibration acoustic wave based charged flaw detection device and method for porcelain post insulator |
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| JPH11304775A (en) * | 1998-04-17 | 1999-11-05 | Hitachi Constr Mach Co Ltd | Ultrasonic probe and its manufacture |
| CN1948962B (en) * | 2005-10-12 | 2010-09-08 | 华东电力试验研究院有限公司 | Supersonic crack detecting method of pillar porcelain insulator and probe thereof |
| CN203758965U (en) * | 2014-02-28 | 2014-08-06 | 南京卓实电气有限责任公司 | Quick ultrasonic flaw detection measurement device for support pillar porcelain insulator |
| CN103901109A (en) * | 2014-03-31 | 2014-07-02 | 华南理工大学 | Phased array ultrasonic detection device and method for inner defects of composite insulator |
| CN106053603A (en) * | 2016-06-06 | 2016-10-26 | 平高集团有限公司 | Ultrasonic time-domain detection method for pore defect of epoxy casting insulation part |
| CN107478728B (en) * | 2017-08-15 | 2021-02-12 | 重庆大学 | Nondestructive testing method for composite insulator |
| CN107589176A (en) * | 2017-10-31 | 2018-01-16 | 武汉泽旭科技有限公司 | A kind of detection method of insulator ultrasonic wave detecting system and the application system |
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| CN104897776A (en) * | 2015-06-16 | 2015-09-09 | 国网山东省电力公司聊城供电公司 | Vibration acoustic wave based charged flaw detection device and method for porcelain post insulator |
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