CN114092398A - Method, device, equipment and medium for grading defects of hot-melt joint of polyethylene gas pipeline - Google Patents
Method, device, equipment and medium for grading defects of hot-melt joint of polyethylene gas pipeline Download PDFInfo
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Abstract
The invention discloses a method, a device, equipment and a medium for grading defects of hot-melt joints of polyethylene gas pipelines, wherein the method comprises the following steps: manufacturing a typical sample, detecting the typical sample to obtain a typical detection image, establishing a hot melt joint defect image library, determining the image characteristics of the hot melt joint, and establishing a hot melt joint defect grading index; detecting a hot-melting joint of a target polyethylene gas pipeline to obtain a target detection image, and determining the type of the defects of the hot-melting joint of the target polyethylene gas pipeline; classifying the hot-melt joint defects of the target polyethylene gas pipeline based on hot-melt joint defect classification indexes and the ratio of the type of the hot-melt joint defects of the target polyethylene gas pipeline to the accumulated defect length to the total weld length, and determining the grade of the hot-melt joint defects of the target polyethylene gas pipeline.
Description
Technical Field
The invention relates to the technical field of welding of polyethylene gas pipelines, in particular to a method, a device, equipment and a computer storage medium for grading and evaluating defects of a hot-melt joint of a polyethylene gas pipeline based on microwave nondestructive testing.
Background
The polyethylene gas pipeline welding joint is a weak link in the whole polyethylene pipeline system and is a key node which influences the integrity and the service life of the whole pipeline system. At home and abroad, polyethylene gas pipelines generally adopt two connection modes of hot melt butt joint connection and electric melting connection.
At present, the quality control of polyethylene gas pipeline welding joints is mainly based on process control. However, in the actual construction process, due to the influence of various uncertain factors such as environment, personnel, equipment and the like, the welded joint is difficult to avoid the defects of cold welding, incomplete fusion, holes and the like. A welded joint containing defects may fail under prolonged application of certain stresses resulting in gas leakage.
The existing welding quality inspection means mainly adopt appearance inspection, some defect types cannot be detected through the appearance inspection, and the long-term safe operation of the gas pipeline is seriously damaged.
In order to further improve the reliability and the safety of the polyethylene pipeline system, nondestructive detection is carried out on the basis of appearance inspection, so that the defect of the appearance inspection can be effectively made up, and the risk of pipeline operation is reduced.
The nondestructive testing technology for the electric fusion welding joint is the ultrasonic phased array technology which is mature at present, has the conditions of application in construction sites, and has promulgated and implemented corresponding international, national, industrial or local standards. In the standard, requirements of detection equipment, personnel, process flows and the like are definitely specified, and defect classification indexes are specified, so that classification evaluation of defects is realized, and the standard is more operable.
However, an effective detection means for the welding quality of the thermal fusion joint has been lacking. At present, nondestructive testing technologies with hot-melt joint testing capability include microwave technology, ultrasonic phased array technology, diffraction time difference method ultrasonic technology, terahertz technology, and the like. In particular, microwave technology is patented in the united states as early as 1998, and detection equipment is commercialized, and is widely applied to nondestructive detection of polyethylene pipeline hot-melt joints in the united states, and is the most mature and competitive hot-melt joint nondestructive detection technology at the present stage.
At present, the relevant standards of hot melt joint microwave detection are not established in China. Therefore, the nondestructive testing of the polyethylene pipeline hot-melt joint by adopting the microwave technology cannot realize the grading evaluation of the defects.
Disclosure of Invention
In view of the above, the invention provides a method, an apparatus, a device and a computer storage medium for grading and evaluating defects of a hot-melt joint of a polyethylene gas pipeline based on microwave nondestructive testing, so as to realize grading and evaluating the defects of the hot-melt joint.
The invention provides a method for grading defects of hot-melt joints of polyethylene gas pipelines, which comprises the following steps: establishing a classification index of the defects of the hot-melt joint; detecting a hot-melting joint of a target polyethylene gas pipeline to obtain a target detection image, and determining the type of the defects of the hot-melting joint of the target polyethylene gas pipeline; classifying the defects of the hot-melt joint of the target polyethylene gas pipeline based on the hot-melt joint defect classification index, the type of the hot-melt joint of the target polyethylene gas pipeline and the ratio of the accumulated defect length to the total weld length, and determining the grade of the defects of the hot-melt joint of the target polyethylene gas pipeline.
The invention provides a device for grading and evaluating the defects of the hot-melt joint of the polyethylene gas pipeline, which comprises a grading index making module, a classification index judging module and a classification index judging module, wherein the grading index making module is used for making a typical sample, detecting the typical sample to obtain a typical detection image, establishing a hot-melt joint defect image library, determining the image characteristics of the hot-melt joint and making a hot-melt joint defect grading index; the target detection module is used for detecting a hot-melting joint of a target polyethylene gas pipeline to obtain a target detection image and determining the type of the defects of the hot-melting joint of the target polyethylene gas pipeline; and the grading module is used for grading the defects of the hot-melt joint of the target polyethylene gas pipeline based on the hot-melt joint defect grading index, the type of the defects of the hot-melt joint of the target gas pipeline and the ratio of the accumulated length of the defects to the total length of the welding line, and determining the grade of the defects of the hot-melt joint of the target polyethylene gas pipeline.
The invention provides a device for grading the defects of hot-melt joints of polyethylene gas pipelines, which comprises: a memory for storing a computer program; a processor for implementing the following steps when executing the computer program: establishing a classification index of the defects of the hot-melt joint; detecting a hot-melting joint of a target polyethylene gas pipeline to obtain a target detection image, and determining the type of the defects of the hot-melting joint of the target polyethylene gas pipeline; classifying the defects of the hot-melt joint of the target polyethylene gas pipeline based on the hot-melt joint defect classification index, the type of the hot-melt joint of the target polyethylene gas pipeline and the ratio of the accumulated defect length to the total weld length, and determining the grade of the defects of the hot-melt joint of the target polyethylene gas pipeline.
A fourth aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of:
formulating a hot-melt joint defect classification index, detecting a hot-melt joint of a target polyethylene gas pipeline to obtain a target detection image, and determining the type of the hot-melt joint defect of the target polyethylene gas pipeline; classifying the defects of the hot-melt joint of the target polyethylene gas pipeline based on the hot-melt joint defect classification index, the type of the hot-melt joint of the target polyethylene gas pipeline and the ratio of the accumulated defect length to the total weld length, and determining the grade of the defects of the hot-melt joint of the target polyethylene gas pipeline.
According to the method and the device for grading the defects of the hot-melt joints of the polyethylene gas pipeline, firstly, the types of the defects of the hot-melt joints are determined according to the image characteristics of the defects of the hot-melt joints, the accumulated length of the defects of the hot-melt joints is measured, and the defects of the hot-melt joints are graded according to the ratio of the accumulated length of the defects of the hot-melt joints to the total length of a welding seam.
Drawings
For purposes of illustration and not limitation, the present invention will now be described in accordance with its preferred embodiments, particularly with reference to the accompanying drawings, in which:
FIG. 1 is a flow chart of a method for grading defects of a hot-melt joint of a polyethylene gas pipeline according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for grading defects of hot-melt joints of polyethylene gas pipelines according to another embodiment of the present invention;
FIG. 3 is a standard thermal fusion joint image;
FIG. 4 is an image of an unsoldered thermal fusion splice;
FIG. 5 is an image of an unfused thermal fusion joint;
FIG. 6 is a flow chart of another method for grading defects of hot-melt joints of polyethylene gas pipelines according to another embodiment of the present invention;
FIG. 7 is a block diagram of a device for grading defects of a hot-melt joint of a polyethylene gas pipeline according to another embodiment of the present invention;
fig. 8 is a block diagram of a device for grading defects of a hot-melt joint of a gas pipeline according to another embodiment of the invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a detailed description of the present invention will be given below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention, and the described embodiments are merely a subset of the embodiments of the present invention, rather than a complete embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
For nondestructive testing of hot-melt joints of polyethylene gas pipelines, a defect classification index is specified in local standard DB 31/T1058-2017 Polyethylene (PE) pipeline welding joint phased array ultrasonic testing for gas in Shanghai. The index is established on the basis that the defect of the hot-melt joint is detected by an ultrasonic phased array technology, the defect type is judged, and the defect is quantitatively analyzed, so that the index can be really applied.
However, in actual operation, the ultrasonic phased array technology is used for detecting the hot-melt joint, has a detection blind area, cannot cover the whole welding surface, and cannot realize the detection of cold welding defects. Therefore, the ultrasonic phased array technology itself has certain limitations in being applied to nondestructive testing of the hot-melt joint.
Fig. 1 is a method for grading and evaluating defects of a hot-melt joint of a polyethylene gas pipeline according to an embodiment of the present invention, in which the method takes a polyethylene gas pipeline as an example and adopts a microwave detection technology to grade and evaluate the defects of the hot-melt joint of the polyethylene gas pipeline.
Referring to fig. 1, the method for grading the defect of the hot-melt joint of the polyethylene gas pipeline includes the following steps:
s100, manufacturing a typical sample, detecting the typical sample to obtain a typical detection image, establishing a hot melt joint defect image library, and establishing a hot melt joint defect grading index.
As shown in fig. 2, in some embodiments, the specific implementation manner of the step 100 is as follows:
s101, preparing a typical sample.
In this embodiment, typical samples include normally welded polyethylene gas pipe hot-melt joints, as well as polyethylene gas pipe hot-melt joints containing typical defects, such as cold welded, unfused, inclusion of fusion interfaces, and the like. The number of samples per gauge is conventionally between about 30-40.
S102, detecting typical samples by microwaves to obtain typical detection images, establishing a hot melt joint defect image library, and determining different types of hot melt joint image characteristics.
Typical samples included normally welded polyethylene gas pipe hot melt joints, as well as polyethylene gas pipe hot melt joints containing typical defects.
And respectively carrying out nondestructive testing on the normally welded polyethylene gas pipeline hot-melt joint and the polyethylene gas pipeline hot-melt joint containing the typical defects by adopting a microwave detection technology to obtain a normally welded hot-melt joint standard image and a hot-melt joint image containing the typical defects.
Based on the hot melt joint image containing the typical defects, a library of hot melt joint defect images is created.
From the analysis of the standard image of the hot-melt joint for normal welding and the image of the hot-melt joint containing typical defects, the image characteristics of the hot-melt joint can be classified into three categories: standard, lack of penetration and lack of fusion.
Figure 3 shows a standard thermal fusion splice image. As shown in FIG. 3, the standard hot-melt joint image shows clear and regular weld, flatness and no fluctuation, normal weld width, uninterrupted blue/magenta lines, and uniform spacing between the inner curl and the weld.
Fig. 4 shows an image of a hot-melt joint that is not welded through. As shown in fig. 4, in the weld area in the transverse axis direction of the image of the hot-melt joint that is not welded through, the image of the entire weld or a part of the entire standard weld is not seen as non-welded through. Such images are often present in hot-melt joints with defects such as cold welding, inclusion of fusion interfaces, and the like.
FIG. 5 shows an unfused thermal fusion joint image. As shown in fig. 5, in the weld area in the transverse direction of the image of the unfused hot-melt joint, the entire weld or a part of the image of the weld is not fused. Hot-melt joints that are often severely deficient in cold welding, fusion face inclusions, and the like, often exhibit such images.
In the embodiment, the typical defect characteristics of the hot-melt joint image detected by microwave determine the image characteristics of the standard, incomplete penetration and incomplete fusion hot-melt joint, and the qualitative analysis of the defect on the detected hot-melt joint image is realized.
S103, measuring the accumulated length of the hot melt joint defects which are not welded through or fused in the typical sample based on the image characteristics of the hot melt joint, and calculating a first ratio of the accumulated length of the hot melt joint defects to the total length of the welding seam.
Based on the images of the hot-melt joints which are not welded through and the images of the hot-melt joints which are not fused, the accumulated length X of the areas which are not welded through or fused in the direction of the transverse axis is measured, the total length L of the welding seam is measured, and a first ratio of the accumulated length X of the hot-melt joint defects to the total length L of the welding seam is calculated.
And S104, performing destructive test on the prepared typical sample to obtain a destructive test result, and comparing and analyzing the destructive test result with the first ratio to obtain a hot-melt joint defect grading index.
Destructive testing is a well-known verification method for judging whether the quality of the hot-melt joint is qualified or not. And performing destructive test on the prepared typical sample to obtain a destructive test result, and comparing and analyzing the destructive test result and the X/L value to obtain a hot-melt joint defect grading index.
The defect classification indexes of the hot-melt joint comprise a first grade, a second grade and a third grade, and the destructive tests of the first grade and the second grade are qualified; grade iii destructive testing failed.
In the embodiment, the hot-melt joint defect image is analyzed through quantization, the hot-melt joint defect classification index is correspondingly formulated, and the hot-melt joint defect classification is determined. The grading index reflects the mechanical property of the hot-melt joint and has important significance for guiding on-site welding quality acceptance.
S200, detecting the hot-melt joint of the target polyethylene gas pipeline to obtain a target detection image, and determining the type of the defects of the hot-melt joint of the target polyethylene gas pipeline.
As shown in fig. 2, the specific implementation manner of the step 200 is as follows:
s201, detecting a target polyethylene gas pipeline hot melting joint to obtain a target detection image.
And taking the hot-melt joint of the polyethylene gas pipeline as a detected target, and acquiring an image of the hot-melt joint of the target polyethylene gas pipeline by adopting a microwave detection technology.
S202, determining the type of the hot-melt joint defect of the target polyethylene gas pipeline based on the hot-melt joint defect image library.
The hot-melt joint defect image library includes an unwelded hot-melt joint image, an unfused hot-melt joint image, and the like.
And comparing a target detection image obtained after the hot-melting joint of the target polyethylene gas pipeline is detected with an image stored in a hot-melting joint defect image library, and determining the type of the hot-melting joint defect of the target polyethylene gas pipeline.
S300, classifying the defects of the hot-melt joint of the target polyethylene gas pipeline based on the hot-melt joint defect classification index and the ratio of the type of the hot-melt joint of the target polyethylene gas pipeline to the accumulated length of the defects to the total length of the welding line, and determining the grade of the defects of the hot-melt joint of the target polyethylene gas pipeline.
As shown in fig. 6, the specific implementation of step 300 is as follows:
s301, measuring the accumulated length of the hot-melt joint defect of the target polyethylene gas pipeline based on the type of the hot-melt joint defect of the target polyethylene gas pipeline.
The type of hot-melt joint defect of the target polyethylene gas pipeline is incomplete penetration or incomplete fusion. And measuring the accumulated length of the defects of the hot-melt joint of the target polyethylene gas pipeline based on the image of the hot-melt joint of the target polyethylene gas pipeline, and measuring the total length of the welding line corresponding to the defects of the hot-melt joint of the target polyethylene gas pipeline.
S302, calculating a second ratio of the accumulated length of the defects of the hot-melt joint of the target polyethylene gas pipeline to the total length of the corresponding welding seam.
S303, determining the grade of the hot-melt joint defect of the target polyethylene gas pipeline based on the second ratio and the hot-melt joint defect grading index.
And determining the grade of the hot-melt joint defect of the target polyethylene gas pipeline according to the grading index of the hot-melt joint defect and the second ratio. The grade of the target polyethylene gas pipeline hot-melt joint defect can be I grade, II grade and III grade, and is determined by the second ratio.
The method for grading and evaluating the defects of the hot-melt joints of the polyethylene gas pipelines comprises the steps of firstly, detecting manufactured typical samples to obtain detection images, establishing a hot-melt joint typical defect image library on corresponding detected typical sample microwave images, determining the image characteristics of the hot-melt joints of different types, measuring the accumulated length of the defects of the hot-melt joints of the polyethylene gas pipelines, and comparing and analyzing destructive test results according to the ratio of the accumulated length of the defects of the hot-melt joints of the polyethylene gas pipelines to the total length of welding seams to establish grading indexes of the defects of the hot-melt joints. And then, detecting the hot-melting joint of the target polyethylene gas pipeline to obtain a detection image, comparing the established hot-melting joint defect image library, determining the defect type of the hot-melting joint of the target polyethylene gas pipeline, and determining the defect grade of the hot-melting joint of the target polyethylene gas pipeline based on the defect type of the hot-melting joint of the target polyethylene gas pipeline and the ratio of the accumulated defect length to the total length of the welding seam.
The method for grading the defects of the hot-melt joints of the polyethylene gas pipelines has high reliability and high operability, and the grading evaluation of the defects of the hot-melt joints is easy to realize.
Fig. 7 is a schematic structural diagram of an apparatus 400 for rating a defect of a hot-melt joint of a polyethylene gas pipeline according to another embodiment of the present invention.
In this embodiment, the apparatus 400 for rating the defect of the hot-melt joint of the polyethylene gas pipeline may be applied to a computer apparatus, and the apparatus 400 for rating the defect of the hot-melt joint of the polyethylene gas pipeline may include a plurality of functional modules composed of program code segments. Program codes of various program segments in the apparatus 400 for polyethylene gas pipeline hot melt joint defect grading assessment may be stored in a memory of a computer device and executed by at least one processor of the computer device to implement (see fig. 1 for details) a polyethylene gas pipeline hot melt joint defect grading assessment function.
In this embodiment, the apparatus 400 for grading defects of hot-melt joints of polyethylene gas pipelines may be divided into a plurality of functional modules according to the functions performed by the apparatus. The functional module may include: a grading index formulation module 401, an object detection module 402 and a grading module 403. The module referred to herein is a series of computer program segments capable of being executed by at least one processor and capable of performing a fixed function and is stored in memory. In the present embodiment, the functions of the modules will be described in detail in the following embodiments.
The grading index formulating module 401 is configured to make a typical sample, detect the typical sample, obtain a typical detection image, establish a hot melt joint defect image library, determine characteristics of the hot melt joint image, and formulate a grading index of the hot melt joint defect.
And the target detection module 402 is configured to detect a target polyethylene gas pipeline hot-melt joint, obtain a target detection image, and determine the type of the target polyethylene gas pipeline hot-melt joint defect.
And the classification module 403 is configured to classify the hot-melt joint defects of the target polyethylene gas pipeline based on the hot-melt joint defect classification index, the type of the hot-melt joint defects of the target polyethylene gas pipeline, and the ratio of the defect accumulated length to the total length of the weld joint, and determine the grade of the hot-melt joint defects of the target gas pipeline.
The device for grading the defects of the hot-melt joints of the polyethylene gas pipelines has high reliability and high operability, and is easy to realize grading evaluation of the defects of the hot-melt joints.
Corresponding to the above method embodiment, referring to fig. 8, fig. 8 is a schematic diagram of a network attack traffic detection device 500 provided by the present invention, where the device 500 may include:
a memory 501 for storing a computer program;
the processor 502, when executing the computer program stored in the memory 501, may implement the following steps:
manufacturing a typical sample, detecting the typical sample to obtain a typical detection image, establishing a hot melt joint defect image library, determining the image characteristics of the hot melt joint, and establishing a hot melt joint defect grading index; detecting a hot-melting joint of a target polyethylene gas pipeline to obtain a target detection image, and determining the type of the defects of the hot-melting joint of the target polyethylene gas pipeline; classifying the defects of the hot-melt joint of the target polyethylene gas pipeline based on the hot-melt joint defect classification index, the type of the hot-melt joint of the target polyethylene gas pipeline and the ratio of the accumulated defect length to the total weld length, and determining the grade of the defects of the hot-melt joint of the target polyethylene gas pipeline.
For the introduction of the device provided by the present invention, please refer to the above method embodiment, which is not described herein again.
Corresponding to the above method embodiment, the present invention further provides a computer-readable storage medium having a computer program stored thereon, the computer program, when executed by a processor, implementing the steps of:
manufacturing a typical sample, detecting the typical sample to obtain a typical detection image, establishing a hot melt joint defect image library, determining the image characteristics of the hot melt joint, and establishing a hot melt joint defect grading index; detecting a hot-melting joint of a target polyethylene gas pipeline to obtain a target detection image, and determining the type of the defects of the hot-melting joint of the target polyethylene gas pipeline; classifying the defects of the hot-melt joint of the target polyethylene gas pipeline based on the hot-melt joint defect classification index, the type of the hot-melt joint of the target polyethylene gas pipeline and the ratio of the accumulated defect length to the total weld length, and determining the grade of the defects of the hot-melt joint of the target polyethylene gas pipeline.
The computer-readable storage medium may include: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
For the introduction of the computer-readable storage medium provided by the present invention, please refer to the above method embodiments, which are not described herein again.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device, the apparatus and the computer-readable storage medium disclosed in the embodiments correspond to the method disclosed in the embodiments, so that the description is simple, and the relevant points can be referred to the description of the method.
The above-described embodiments should not be construed as limiting the scope of the invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for grading defects of hot-melt joints of polyethylene gas pipelines is characterized by comprising the following steps:
establishing a classification index of the defects of the hot-melt joint;
detecting a hot-melting joint of a target polyethylene gas pipeline to obtain a target detection image, and determining the type of the defects of the hot-melting joint of the target polyethylene gas pipeline;
classifying the defects of the hot-melt joint of the target polyethylene gas pipeline based on the hot-melt joint defect classification index, the type of the hot-melt joint of the target polyethylene gas pipeline and the ratio of the accumulated defect length to the total weld length, and determining the grade of the defects of the hot-melt joint of the target polyethylene gas pipeline.
2. The method for grading the defects of the hot-melt joint of the polyethylene gas pipeline according to claim 1, wherein the step of establishing the grade index of the defects of the hot-melt joint comprises the following steps:
manufacturing a typical sample;
detecting the typical sample to obtain a typical detection image, establishing a hot melt joint defect image library, and determining the image characteristics of the hot melt joint;
measuring the accumulated length of the incomplete or un-fused hot melt joint defects in the typical sample and the total length of the corresponding weld seam based on the hot melt joint image characteristics;
calculating a first ratio of the accumulated length of the incomplete penetration or incomplete fusion hot-melt joint defects to the total length of the weld joint;
performing destructive test on the typical sample to obtain a destructive test result;
and comparing and analyzing the destructive test result and the first ratio to determine the classification index of the hot-melt joint defects.
3. The method for rating the defects of the polyethylene gas pipe hot melt joint according to claim 2, wherein the typical samples comprise a normally welded polyethylene gas pipe hot melt joint and a polyethylene gas pipe hot melt joint containing typical defects.
4. The polyethylene gas pipeline hot melt joint defect grading assessment method according to claim 2, wherein the hot melt joint defect image library comprises images of the polyethylene gas pipeline hot melt joints containing typical defects.
5. The method for rating the defects of the hot-melt joint of the polyethylene gas pipeline as claimed in claim 2, wherein the image characteristics of the hot-melt joint comprise standard, lack of penetration and lack of fusion.
6. The polyethylene gas pipeline hot melt joint defect grading assessment method according to claim 1, wherein the target polyethylene gas pipeline hot melt joint defect type is determined by the following method: and comparing the target detection image with the image in the hot-melt joint defect image library to determine the type of the hot-melt joint defect of the target polyethylene gas pipeline.
7. The method for grading the defects of the hot-melt joint of the polyethylene gas pipeline as claimed in claim 1, wherein the step of grading the defects of the hot-melt joint of the target polyethylene gas pipeline comprises the following steps:
measuring the accumulated length of the hot-melt joint defect of the target polyethylene gas pipeline and the total length of the corresponding welding line based on the type of the hot-melt joint defect of the target polyethylene gas pipeline;
calculating a second ratio of the accumulated length of the defects of the hot-melt joint of the target polyethylene gas pipeline to the total length of the corresponding welding line;
and determining the grade of the hot-melt joint defect of the target polyethylene gas pipeline based on the second ratio and the hot-melt joint defect grading index.
8. The utility model provides a device of polyethylene gas pipeline hot melt joint defect grading evaluation which characterized in that includes:
the grading index formulating module is used for manufacturing a typical sample, detecting the typical sample to obtain a typical detection image, establishing a hot melt joint defect image library, determining the image characteristics of the hot melt joint and formulating a hot melt joint defect grading index;
the target detection module is used for detecting a target polyethylene gas pipeline hot-melt joint to obtain a target detection image and determining the type of the target polyethylene gas pipeline hot-melt joint defect;
and the grading module is used for grading the defects of the hot-melt joint of the target polyethylene gas pipeline based on the hot-melt joint defect grading index, the type of the defects of the hot-melt joint of the target polyethylene gas pipeline and the ratio of the accumulated length of the defects to the total length of the welding line, and determining the grade of the defects of the hot-melt joint of the target polyethylene gas pipeline.
9. The utility model provides an equipment of polyethylene gas pipeline hot melt joint defect grading assessment which characterized in that includes:
a memory for storing a computer program;
a processor for implementing the steps of the method for rating the defect of the hot-melt joint of the polyethylene gas pipeline according to any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when executed by a processor, the computer program implements the steps of the method for rating polyethylene gas pipeline hot melt joint defects according to any one of claims 1 to 7.
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| CN202111215545.0A CN114092398A (en) | 2021-10-19 | 2021-10-19 | Method, device, equipment and medium for grading defects of hot-melt joint of polyethylene gas pipeline |
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| CN202111215545.0A CN114092398A (en) | 2021-10-19 | 2021-10-19 | Method, device, equipment and medium for grading defects of hot-melt joint of polyethylene gas pipeline |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259252A (en) * | 2015-10-15 | 2016-01-20 | 浙江大学 | Method for automatically identifying defect type of polyethylene electrofusion joint through ultrasonic phased array inspection |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259252A (en) * | 2015-10-15 | 2016-01-20 | 浙江大学 | Method for automatically identifying defect type of polyethylene electrofusion joint through ultrasonic phased array inspection |
Non-Patent Citations (1)
| Title |
|---|
| 上海市质量技术监督局: "燃气用聚乙烯（PE）管道焊接接头相控阵超声检测", 《燃气用聚乙烯（PE）管道焊接接头相控阵超声检测》, pages 1 - 36 * |
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