CN113640298B - RTV coating defect detection method and system for power transmission system - Google Patents
RTV coating defect detection method and system for power transmission system Download PDFInfo
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- CN113640298B CN113640298B CN202110740848.8A CN202110740848A CN113640298B CN 113640298 B CN113640298 B CN 113640298B CN 202110740848 A CN202110740848 A CN 202110740848A CN 113640298 B CN113640298 B CN 113640298B
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- 238000000576 coating method Methods 0.000 title claims abstract description 76
- 239000011248 coating agent Substances 0.000 title claims abstract description 75
- 230000007547 defect Effects 0.000 title claims abstract description 37
- 238000001514 detection method Methods 0.000 title claims abstract description 36
- 230000005540 biological transmission Effects 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 30
- 230000002159 abnormal effect Effects 0.000 claims description 61
- 230000015654 memory Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 5
- 238000001931 thermography Methods 0.000 claims description 3
- 238000011179 visual inspection Methods 0.000 abstract description 5
- 238000004590 computer program Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 239000012212 insulator Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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- G—PHYSICS
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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Abstract
The invention discloses a method for detecting RTV coating defects of a power transmission system, which comprises the steps of obtaining an infrared image of an object to be detected; acquiring an amplitude image and a phase image of an object to be detected according to the infrared image; and carrying out RTV coating defect detection according to the amplitude image of the object to be detected, the phase image of the object to be detected, the amplitude image of the preset standard component and the phase image of the preset standard component. Corresponding systems are also disclosed. The invention realizes the defect detection of the RTV coating based on the amplitude image and the phase image, and compared with the traditional visual inspection method, the invention has the advantages of no influence of personnel experience, higher accuracy and higher detection efficiency.
Description
Technical Field
The invention relates to a method and a system for detecting RTV coating defects of a power transmission system, and belongs to the field of nondestructive detection.
Background
In power systems, power transmission and transformation equipment and lines are exposed to outdoor environments, and the pollution on the outer surfaces of the equipment and the lines gradually increases with the passage of time. Once severe weather such as capillary rain, heavy fog, snow and the like occurs, the pollution on the outer insulating surface can be gradually moistened, large-area pollution flashover is extremely easy to occur, the pollution flashover can seriously influence the safe operation of a power system, and accidents such as large-area power failure and the like are easy to cause.
Room temperature vulcanized silicone Rubber (RTV) can be vulcanized into a film at room temperature, and has unique hydrophobicity and arc ablation resistance. The RTV is coated on the surface of the insulator, so that leakage current and generation and development of partial arc can be inhibited, and the pollution flashover resistance voltage of the insulator can be remarkably improved.
However, due to problems in the coating process or prolonged exposure to the environment, the RTV coating may be separated from the bottom insulator to form a debonding, which may result in peeling, etc. of the RTV coating after a prolonged period of time, thereby reducing the effective protective life of the RTV coating.
At present, most of commonly used RTV coating defect detection is a visual inspection method, whether the RTV coating is in a debonding phenomenon is judged by manually observing the state of the RTV coating on the surface of equipment, the detection result is influenced by factors such as experience of detection personnel, and the like, so that the detection efficiency is low.
Disclosure of Invention
The invention provides a method and a system for detecting RTV coating defects of a power transmission system, which solve the problems of high uncertainty and low detection efficiency of a visual inspection method.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for detecting defects of RTV coating of power transmission system comprises,
Acquiring an infrared image of an object to be detected;
Acquiring an amplitude image and a phase image of an object to be detected according to the infrared image;
and carrying out RTV coating defect detection according to the amplitude image of the object to be detected, the phase image of the object to be detected, the amplitude image of the preset standard component and the phase image of the preset standard component.
And acquiring an infrared image of the object to be detected by adopting a phase-locked thermal imaging detection method.
According to the amplitude image of the object to be detected, the phase image of the object to be detected, the amplitude image of the preset standard component and the phase image of the preset standard component, the RTV coating defect detection is carried out, specifically,
Acquiring an abnormal region according to the amplitude image and the phase image of the object to be detected;
And detecting the RTV coating defects according to the amplitude of the abnormal region, the phase difference of the abnormal region, the amplitude image of the preset standard part and the phase image of the preset standard part.
And taking the area with abnormal amplitude and/or abnormal phase difference as an abnormal area according to the amplitude image and the phase image of the object to be detected.
According to the amplitude of the abnormal region, the phase difference of the abnormal region, the amplitude image of the preset standard part and the phase image of the preset standard part, the RTV coating defect detection is carried out, specifically,
If the amplitude of the abnormal region is different from the amplitude of other regions in the amplitude image of the object to be detected, and the phase difference of the abnormal region is not different from the phase difference of other regions in the amplitude image of the object to be detected, the thickness of the RTV coating of the abnormal region is not changed, but the debonding phenomenon exists under the RTV coating;
If the amplitude of the abnormal region is not different from the amplitude of other regions in the amplitude image of the object to be detected, and the phase difference of the abnormal region is not different from the phase difference of other regions in the amplitude image of the object to be detected, the thickness of the RTV coating in the abnormal region is changed, and whether the debonding phenomenon exists under the RTV coating is judged according to the amplitude image of the preset standard part and the phase image of the preset standard part.
Judging whether the debonding phenomenon exists under the RTV coating according to the amplitude image of the preset standard component and the phase image of the preset standard component, wherein the specific process is that,
Acquiring a position X which is the same as the phase difference of the abnormal region in the preset standard component according to the phase image of the preset standard component;
Acquiring the amplitude of the position X according to the amplitude image of the preset standard component;
if the difference value between the amplitude of the abnormal region and the amplitude of the position X is 0, the debonding phenomenon does not exist under the RTV coating;
If the difference value between the amplitude of the abnormal region and the amplitude of the position X is not 0, the debonding phenomenon exists under the RTV coating.
The RTV coating thickness of the standard part gradually increases from left to right, and is uniform from top to bottom.
An RTV coating defect detection system of a power transmission system comprises,
An infrared image acquisition module: acquiring an infrared image of an object to be detected;
amplitude phase image acquisition module: acquiring an amplitude image and a phase image of an object to be detected according to the infrared image;
And a defect detection module: and carrying out RTV coating defect detection according to the amplitude image of the object to be detected, the phase image of the object to be detected, the amplitude image of the preset standard component and the phase image of the preset standard component.
A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform a power transmission system, RTV, coating defect detection method.
A computing device comprising one or more processors, one or more memories, and one or more programs, wherein one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing a power transmission system, RTV, coating defect detection method.
The invention has the beneficial effects that: 1. the invention realizes the defect detection of the RTV coating based on the amplitude image and the phase image, and compared with the traditional visual inspection method, the invention has the advantages of no influence of personnel experience, higher accuracy and higher detection efficiency; 2. according to the invention, the influence of the thickness change of the RTV coating and the influence of the debonding defect under the coating are distinguished by combining the mode of multiple comparison of the amplitude image and the phase image, so that the influence of the thickness change of the RTV coating and the influence of the debonding defect under the coating are prevented from being overlapped and mixed, and the detection accuracy is enhanced.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
Fig. 2 is a schematic diagram of a standard.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
As shown in fig. 1, a method for detecting defects of an RTV coating of a power transmission system includes the following steps:
Step 1, acquiring an infrared image of an object to be detected by adopting a phase-locked thermal imaging detection method; i.e. to excite the object to be detected and collect the corresponding infrared image.
And 2, acquiring an amplitude image and a phase image of the object to be detected through calculation according to the infrared image.
And step 3, acquiring an abnormal region according to the amplitude image and the phase image of the object to be detected.
According to the amplitude image and the phase image of the object to be detected, taking the area with abnormal amplitude and/or abnormal phase difference as an abnormal area; that is, an area with abnormal amplitude (that is, an area with obvious difference between the amplitude and other areas), no matter whether the phase difference of the area is abnormal, the area is an abnormal area, the area with abnormal phase difference is the same area, and no matter whether the amplitude of the area is abnormal, the area is an abnormal area.
Step 4, performing RTV coating defect detection according to the amplitude of the abnormal region, the phase difference of the abnormal region, the amplitude image of the preset standard component and the phase image of the preset standard component; the phase image and the amplitude image of the standard component are obtained according to the method of the step 1-2, the surface of the standard component is coated with an RTV coating of the same material as the object to be detected, the thickness of the RTV coating is gradually thickened from left to right, and the thickness of the RTV coating is uniform from top to bottom.
If the amplitude of the abnormal region is different from the amplitude of other regions in the amplitude image of the object to be detected, and the phase difference of the abnormal region is not different from the phase difference of other regions in the amplitude image of the object to be detected, the thickness of the RTV coating of the abnormal region is not changed, but the debonding phenomenon exists under the RTV coating;
If the amplitude of the abnormal region is not different from the amplitude of other regions in the amplitude image of the object to be detected, and the phase difference of the abnormal region is not different from the phase difference of other regions in the amplitude image of the object to be detected, the thickness of the RTV coating in the abnormal region is changed, but whether the debonding phenomenon exists cannot be judged, and whether the debonding phenomenon exists under the RTV coating is further judged according to the amplitude image of the preset standard part and the phase image of the preset standard part.
The specific process is as follows:
S1) acquiring a position X which is the same as the phase difference of the abnormal region in the preset standard component according to the phase image of the preset standard component;
s2) acquiring the amplitude of the position X according to the amplitude image of the preset standard component;
S3) if the difference value between the amplitude of the abnormal region and the amplitude of the position X is 0, the debonding phenomenon does not exist under the RTV coating; if the difference value between the amplitude of the abnormal region and the amplitude of the position X is not 0, the debonding phenomenon exists under the RTV coating.
The method realizes the defect detection of the RTV coating based on the amplitude image and the phase image, and compared with the traditional visual inspection method, the method has the advantages of no influence of personnel experience, higher accuracy and higher detection efficiency; meanwhile, the method combines the mode of multiple comparison of the amplitude image and the phase image, so that the influence of the thickness change of the RTV coating and the influence of the debonding defect under the coating are distinguished from each other, the influence of the thickness change of the RTV coating and the influence of the debonding defect under the coating are prevented from being overlapped and mixed, and the detection accuracy is enhanced.
An RTV coating defect detection system of a power transmission system comprises,
An infrared image acquisition module: acquiring an infrared image of an object to be detected;
amplitude phase image acquisition module: acquiring an amplitude image and a phase image of an object to be detected according to the infrared image;
And a defect detection module: and carrying out RTV coating defect detection according to the amplitude image of the object to be detected, the phase image of the object to be detected, the amplitude image of the preset standard component and the phase image of the preset standard component.
A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform a power transmission system, RTV, coating defect detection method.
A computing device comprising one or more processors, one or more memories, and one or more programs, wherein one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing a power transmission system, RTV, coating defect detection method.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing is illustrative of the present invention and is not to be construed as limiting thereof, but rather as providing for the use of additional embodiments and advantages of all such modifications, equivalents, improvements and similar to the present invention are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (7)
1. A method for detecting defects of RTV coating of a power transmission system is characterized by comprising the following steps: comprising the steps of (a) a step of,
Acquiring an infrared image of an object to be detected;
Acquiring an amplitude image and a phase image of an object to be detected according to the infrared image;
acquiring an abnormal region according to the amplitude image and the phase image of the object to be detected;
If the amplitude of the abnormal region is different from the amplitude of other regions in the amplitude image of the object to be detected, and the phase difference of the abnormal region is not different from the phase difference of other regions in the amplitude image of the object to be detected, the thickness of the RTV coating of the abnormal region is not changed, but the debonding phenomenon exists under the RTV coating;
If the amplitude of the abnormal region is not different from the amplitude of other regions in the amplitude image of the object to be detected, and the phase difference of the abnormal region is not different from the phase difference of other regions in the amplitude image of the object to be detected, the thickness of the RTV coating of the abnormal region is changed, and whether the debonding phenomenon exists under the RTV coating is judged according to the amplitude image of the preset standard part and the phase image of the preset standard part;
wherein, judging whether the debonding phenomenon exists under the RTV coating according to the amplitude image of the preset standard component and the phase image of the preset standard component, the specific process is that,
Acquiring a position X which is the same as the phase difference of the abnormal region in the preset standard component according to the phase image of the preset standard component;
Acquiring the amplitude of the position X according to the amplitude image of the preset standard component;
if the difference value between the amplitude of the abnormal region and the amplitude of the position X is 0, the debonding phenomenon does not exist under the RTV coating;
If the difference value between the amplitude of the abnormal region and the amplitude of the position X is not 0, the debonding phenomenon exists under the RTV coating.
2. The method for detecting defects of RTV coating of power transmission system according to claim 1, wherein the method comprises the following steps: and acquiring an infrared image of the object to be detected by adopting a phase-locked thermal imaging detection method.
3. The method for detecting defects of RTV coating of power transmission system according to claim 1, wherein the method comprises the following steps: and taking the area with abnormal amplitude and/or abnormal phase difference as an abnormal area according to the amplitude image and the phase image of the object to be detected.
4. A method for detecting defects of an RTV coating of a power transmission system according to any one of claims 1 to 3, characterized in that: the RTV coating thickness of the standard part gradually increases from left to right, and is uniform from top to bottom.
5. An RTV coating defect detection system for a power transmission system, characterized in that: comprising the steps of (a) a step of,
An infrared image acquisition module: acquiring an infrared image of an object to be detected;
amplitude phase image acquisition module: acquiring an amplitude image and a phase image of an object to be detected according to the infrared image;
And a defect detection module: acquiring an abnormal region according to the amplitude image and the phase image of the object to be detected;
If the amplitude of the abnormal region is different from the amplitude of other regions in the amplitude image of the object to be detected, and the phase difference of the abnormal region is not different from the phase difference of other regions in the amplitude image of the object to be detected, the thickness of the RTV coating of the abnormal region is not changed, but the debonding phenomenon exists under the RTV coating;
If the amplitude of the abnormal region is not different from the amplitude of other regions in the amplitude image of the object to be detected, and the phase difference of the abnormal region is not different from the phase difference of other regions in the amplitude image of the object to be detected, the thickness of the RTV coating of the abnormal region is changed, and whether the debonding phenomenon exists under the RTV coating is judged according to the amplitude image of the preset standard part and the phase image of the preset standard part;
wherein, judging whether the debonding phenomenon exists under the RTV coating according to the amplitude image of the preset standard component and the phase image of the preset standard component, the specific process is that,
Acquiring a position X which is the same as the phase difference of the abnormal region in the preset standard component according to the phase image of the preset standard component;
Acquiring the amplitude of the position X according to the amplitude image of the preset standard component;
if the difference value between the amplitude of the abnormal region and the amplitude of the position X is 0, the debonding phenomenon does not exist under the RTV coating;
If the difference value between the amplitude of the abnormal region and the amplitude of the position X is not 0, the debonding phenomenon exists under the RTV coating.
6. A computer readable storage medium storing one or more programs, characterized by: the one or more programs include instructions, which when executed by a computing device, cause the computing device to perform any of the methods of claims 1-4.
7. A computing device, characterized by: comprising the steps of (a) a step of,
One or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing any of the methods of claims 1-4.
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