CN111551637B - Submarine pipeline weld defect AUT detection and quantification method and system - Google Patents
Submarine pipeline weld defect AUT detection and quantification method and system Download PDFInfo
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Abstract
The invention discloses a submarine pipeline weld defect AUT detection and quantification method, which comprises the following steps: an image acquisition step of acquiring an ultrasonic detection display image; an image adjustment step of adjusting a sector display scaling; a step of determining the central position of the weld defect, in which a circumferential position pointer and an angle pointer are moved to enable the angle pointer to be positioned at the central position of a central color block of the weld defect; a step of acquiring center position information of a center color block of the weld defect, in which a reference pointer is moved to the center position of the center color block of the weld defect to acquire the center position information of the center color block of the weld defect; and a depth information calculation step of the weld defect, wherein the depth information of the weld defect is obtained according to the central position depth information of the central color block of the weld defect. The method is based on the display characteristics of AUT detection, and the color change of the defect image in fan-shaped display is utilized to accurately quantify the defect size, so that the accuracy of highly quantifying the defect of the welding line is improved.
Description
Technical Field
The invention belongs to the technical field of submarine pipeline AUT detection, and particularly relates to a submarine pipeline weld defect AUT detection quantitative method and system.
Background
With the continuous acceleration of the development progress of modern industry, deep-sea oil gas development has become a necessary trend, and the importance of the marine petroleum pipeline for conveying the deep-sea oil gas is also continuously highlighted, so that the welding quality of the circumferential weld of the marine petroleum pipeline has also become the focus of increasing attention.
Meanwhile, with the great use of engineering critical evaluation (Engineering Critical Assessment, ECA) acceptance criteria, the quality assessment of the circumferential weld of the submarine pipeline is changed from the initial simple defect length measurement to the combined defect height and length joint assessment, so that the display assessment precision of the full-automatic ultrasonic detection (Automated Ultrasonic Testing, AUT) defect detection is improved, and the method has very important effects on promoting the application of the AUT detection technology in submarine pipeline laying and improving submarine pipeline laying efficiency.
However, the conventional fan-shaped display image has larger height evaluation error, so that the reject ratio of the welding line is higher, the normal laying efficiency of the submarine pipeline is affected, the application of the display image in the submarine pipeline is greatly limited, and the accuracy of how to improve the defect height quantification is particularly important in the application process of the AUT detection in the submarine pipeline.
Disclosure of Invention
Aiming at the technical problem that the failure rate of welding seams is high due to large quantitative error of the height of a conventional fan-shaped display image, the invention provides a submarine pipeline welding seam defect AUT detection and quantification method and system.
The invention provides a submarine pipeline weld defect AUT detection and quantification method, which comprises the following steps:
an image acquisition step of acquiring an ultrasonic detection display image, wherein the display image comprises sector display, A-type display and B-type display;
an image adjustment step of adjusting the scaling of the fan-shaped display so that the fan-shaped display can display the color change of the weld defect, the upper surface position of the weld defect and the lower surface position of the weld defect;
a step of determining the central position of the weld defect, wherein the step of determining the central position of the weld defect is to move a circumferential position pointer and an angle pointer to enable the angle pointer to be positioned at the central position of a central color block of the weld defect;
a step of acquiring center position information of a center color block of a weld defect, wherein the step of acquiring center position information of the center color block of the weld defect is to move a reference pointer to the center position of the center color block of the weld defect, acquire the center position information of the center color block of the weld defect, and the position information of the center color block of the weld defect comprises the center position depth information of the center color block of the weld defect;
and a depth information calculation step of the weld defect, wherein the depth information calculation step of the weld defect is to acquire the depth information of the weld defect according to the central position depth information of the central color block of the weld defect.
In one embodiment thereof, the quantification method further comprises the steps of:
a measuring pointer position information obtaining step, wherein the measuring pointer position information obtaining step is to move a measuring pointer to the edge of a gradient color block adjacent to a center color block of the weld defect towards the outer surface direction of the pipeline weld, and obtain the measuring pointer position information;
and a weld defect height information calculating step, wherein the weld defect height information calculating step is to acquire the weld defect height information according to the position information of the measuring pointer.
In one embodiment, the moving the reference pointer to the center position of the center color patch of the weld defect is moving the reference pointer to the intersection of the angle pointer and the center position of the center color patch of the weld defect.
In one embodiment, in the depth information calculating step of the weld defect, the depth value of the weld defect is 2 times the pipeline wall thickness value minus the center position depth value of the center color patch of the weld defect.
In one embodiment, in the weld defect height information calculating step, the height value of the weld defect is an absolute value of a difference between the depth value of the measurement pointer and the depth value of the reference pointer.
In one embodiment, in the image adjustment step, the method further includes adjusting a color patch amplitude of the fan-shaped display to be 70% -90% of a center color patch amplitude of the weld defect in the fan-shaped display.
The invention also provides a submarine pipeline weld defect AUT detection and quantification system, which comprises the following modules:
the image acquisition module is used for acquiring an ultrasonic detection display image, and the display image comprises sector display, A-type display and B-type display;
the image adjustment module is used for adjusting the scaling of the fan-shaped display so that the fan-shaped display can display the color change of the weld defect, the upper surface position of the weld defect and the lower surface position of the weld defect;
the center position determining module of the weld defect is used for moving a circumferential position pointer and an angle pointer to enable the angle pointer to be positioned at the center position of the center color block of the weld defect;
the center position information acquisition module of the center color block of the weld defect is used for moving a reference pointer to the center position of the center color block of the weld defect to acquire the center position information of the center color block of the weld defect, and the position information of the center color block of the weld defect comprises the center position depth information of the center color block of the weld defect;
the welding seam defect depth information calculation module is used for acquiring the depth information of the welding seam defect according to the central position depth information of the central color block of the welding seam defect;
the measuring pointer position information acquisition module is used for moving the measuring pointer to the gradient color block edge adjacent to the center color block of the weld defect towards the outer surface direction of the pipeline weld so as to acquire the measuring pointer position information;
and the weld defect height information acquisition module is used for acquiring the weld defect height information according to the position information of the measuring pointer.
In one embodiment, in the center position information obtaining module of the center color block of the weld defect, the moving the reference pointer to the center position of the center color block of the weld defect is moving the reference pointer to the intersection of the angle pointer and the center position of the center color block of the weld defect.
In one embodiment, in the depth information calculation module of the weld defect, the depth value of the weld defect is 2 pipeline wall thickness values minus a center position depth value of a center color patch of the weld defect.
In one embodiment, in the weld defect height information acquisition module, the height value of the weld defect is an absolute value of a difference between the depth value of the measurement pointer and the depth value of the reference pointer.
According to the method and the system for detecting and quantifying the weld defect AUT of the submarine pipeline, aiming at the AUT detection of the submarine pipeline, based on the display characteristics of the AUT detection, the color change of the defect image in the fan-shaped display is utilized to accurately quantify the defect size, so that the accuracy of quantifying the height of the weld defect is improved, the problem of large quantifying error of the height of the defect in the traditional fan-shaped AUT detection is solved, the quantifying method is simple, no complex data operation is caused, the hardware requirement on a quantifying system is reduced, the AUT detection quantifying precision of welding of the submarine pipeline weld is greatly improved, and the welding quality of the submarine pipeline is ensured; and the AUT detection can meet the requirements of ECA acceptance standards on detection precision, so that the repair rate caused by large quantitative errors of weld defects is reduced, and the laying efficiency of submarine pipelines is improved. Furthermore, the method and the system for detecting and quantifying the weld defect AUT of the submarine pipeline can accurately quantify the depth of the weld defect. The method can enable the minimum size of defect quantification to be 0.9mm under the condition of 90% detection rate of 95% confidence level, and after the detection and quantification method for the weld defect AUT of the submarine pipeline is used for detecting the weld defect, the qualification rate of the detected weld can be greatly improved, and the laying efficiency of the submarine pipeline is further improved.
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FIG. 1 is a schematic flow chart of an embodiment of a method for detecting and quantifying a weld defect AUT of a subsea pipeline according to the present invention;
FIG. 2 is an image acquired in an image acquisition step of the subsea pipeline weld defect AUT detection quantification method shown in FIG. 1;
FIG. 3 is a diagram of various positions obtained in the steps of the quantitative method for detecting the position of a weld defect by the subsea pipeline line AUT shown in FIG. 1;
FIG. 4 is a schematic diagram of an embodiment of a quantitative system for detecting weld defects AUT of a subsea pipeline according to the present invention;
wherein 11-upstream fan display; 12-downstream fan display; 13-upstream type a display; 14-downstream type a display; 15-upstream type B display; 16-downstream type B display; 20-displaying weld defects; 21-center color patch of weld defect; 22-gradient color blocks adjacent to the center color block of the weld defect; 23-the center position of the center color patch of the weld defect; 31-a weld upper surface reference line; 32-a weld lower surface reference line; 40-angle pointer; 50-reference pointer; 51-reference pointer depth value; 60-measuring a pointer; 61-measure pointer depth value.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following detailed description. It should be understood that the detailed description is presented merely to illustrate the invention, and is not intended to limit the invention.
Referring to fig. 1, in an embodiment of the present invention, a method for detecting and quantifying a weld defect AUT of a submarine pipeline is performed by using a weld of a steel pipe made of carbon steel and having a wall thickness of 12.7mm and a V-groove as a detection object, and includes the following steps:
s100, acquiring an ultrasonic detection display image, wherein the display image comprises sector display, A-type display and B-type display.
In the present embodiment, the display image is configured based on the sector display data acquired by the AUT detection, and as shown in fig. 2, the display image configured in the present embodiment has an upstream sector display 11, a downstream sector display 12, an upstream a-type display 13, a downstream a-type display 14, an upstream B-type display 15, and a downstream B-type display 16. By configuring the display image, the position of the weld defect can be conveniently and accurately positioned, and related information can be displayed. In other embodiments, the corresponding real images may be acquired according to the detection accuracy of the weld defect, for example, only the upstream fan display 11, the upstream a-type display 13, and the upstream B-type display 15 may be acquired.
And S200, adjusting the scaling of the fan-shaped display, so that the fan-shaped display can display the color change of the weld defect, the upper surface position of the weld defect and the lower surface position of the weld defect.
As shown in fig. 3, by adjusting the scale of the downstream fan-shaped display, the downstream fan-shaped display 12 can be made to clearly display the center patch 21 of the weld defect and the gradient patches 22 adjacent to the center patch of the weld defect, even if the fan-shaped display clearly displays the gradient change of the color patches of the weld defect; at the same time, weld defect upper surface positional information and weld defect lower surface positional information may also be displayed, such as weld upper surface reference line 31 and weld lower surface reference line 32 may also be clearly displayed in the view of downstream fan display 12.
S300, determining the center position of the weld defect, namely moving the circumferential position pointer and the angle pointer 40 to enable the angle pointer 40 to be located at the center position 23 of the center color block of the weld defect.
S400, center position 23 information of a center color block of the weld defect is obtained, a reference pointer 50 is moved to the center position 23 of the center color block of the weld defect, center position 23 information of the center color block of the weld defect is obtained, and the center position information of the center color block of the weld defect comprises center position 23 depth information of the center color block of the weld defect.
S500, calculating depth information of the weld defect, namely acquiring the depth information of the weld defect according to the depth information of the center position 23 of the center color block of the weld defect.
Optionally, as shown in fig. 2, moving the reference pointer 50 to the center position 23 of the center color block of the weld defect is to move the reference pointer 50 to the junction between the angle pointer and the center position of the center color block of the weld defect, where the depth value displayed by the reference pointer 50 is 19.3mm, which is the depth value of the information of the center position 23 of the center color block of the weld defect, that is, the depth position size displayed by the weld defect. Further, the actual depth of the weld defect is 2 times the wall thickness minus the depth value of the reference pointer 50, and in this embodiment, the wall thickness of the steel pipe is 12.7mm, and the actual depth value of the weld defect=2×12.7mm-19.3 mm=6.0 mm, i.e. the depth value of the weld defect is 6.1mm.
Preferably, the quantifying method of the above embodiment further includes the steps of:
s600, measuring pointer 60 position information obtaining step, namely moving the measuring pointer 60 to the edge of the gradient color block 22 adjacent to the center color block of the weld defect towards the outer surface direction of the pipeline weld joint, and obtaining the position information of the measuring pointer 60.
As shown in fig. 2, the measuring pointer 60 is moved toward the outer surface of the pipeline weld to the edge of the gradient color block adjacent to the center block of the weld defect, and the depth value of the position information of the moving pointer is acquired to be 21.3mm.
S700, a welding seam defect height information calculating step, wherein the welding seam defect height information calculating step is to obtain the welding seam defect height information according to the position information of the measuring pointer 60.
Preferably, in the weld defect height information calculating step, the height value of the weld defect is an absolute value of a difference between the depth value of the measurement pointer 60 and the depth value of the reference pointer 50.
As shown in fig. 3, the depth value of the position information of the measurement pointer 60 is 21.3mm, the depth value of the position information of the reference pointer 50 is 19.3mm, and the height value of the weld defect is the absolute value of the difference between the two, that is, the weld defect height value= |the depth value of the measurement pointer 60-the depth value of the reference pointer 50|= |21.3mm-19.3 mm|=2 mm.
Preferably, the method for detecting and quantifying the weld defect AUT of the submarine pipeline further comprises the following steps:
s800, a weld defect recording step, namely recording the height value and the depth value of the weld defect.
According to the method for detecting and quantifying the weld defect AUT of the submarine pipeline, aiming at the detection of the AUT of the submarine pipeline, based on the display characteristics of the AUT detection, the color change of a defect image in fan-shaped display is utilized to accurately quantify the defect size, so that the accuracy of quantifying the height of the weld defect is improved, the problem of large quantifying error of the height of the defect in the traditional fan-shaped AUT detection is solved, the quantifying method is simple, no complex data operation is caused, the hardware requirement on a quantifying system is reduced, the AUT detection quantifying precision of welding of the submarine pipeline weld is greatly improved, and the welding quality of the submarine pipeline is ensured; and the AUT detection can meet the requirements of ECA acceptance standards on detection precision, so that the repair rate caused by large quantitative errors of weld defects is reduced, and the laying efficiency of submarine pipelines is improved. Furthermore, the submarine pipeline weld defect AUT detection and quantification method can accurately quantify the depth of the weld defect. The method can enable the minimum size of defect quantification to be 0.9mm under the condition of 90% detection rate of 95% confidence level, and after the detection and quantification method for the weld defect AUT of the submarine pipeline is used for detecting the weld defect, the qualification rate of the detected weld can be greatly improved, and the laying efficiency of the submarine pipeline is further improved.
In order to verify the measurement accuracy of the AUT detection and quantification method for the submarine pipeline weld defects, the invention also carries out the height quantification of the detection object (the steel pipe weld with the wall thickness of 12.7mm and the V-shaped groove made of carbon steel) according to a conventional fan-shaped display image height quantification method, wherein the conventional fan-shaped display quantification method is characterized in that an angle pointer is moved, the angle pointer is positioned at the center position of a display signal, a circumferential reference pointer is positioned at the highest amplitude position, the angle pointers are respectively moved to two sides of the center position of the display signal, when the amplitude of the signal is reduced to 50% of the highest amplitude of the center, the depth values of the two positions are recorded, and the depth value difference of the two positions is defined as the height of the defect. The height value of the height ration of the conventional fan-shaped defect is 3.0mm, the height value of the welding seam defect quantified by the method is 2.0mm, and the actual height value of the welding seam defect is 1.9mm. Compared with the conventional fan-shaped display image height quantification method, the quantitative accuracy of the AUT detection quantification method for the pipeline weld defects is obviously improved.
In addition, the invention also carries out high quantitative comparison on a plurality of detection objects according to the AUT detection and quantification method for the weld defects of the submarine pipeline and the conventional fan-shaped display image height quantification method, and the quantification results are shown in table 1.
TABLE 1 quantitative result comparison Table of AUT detection and quantification method for weld defects of submarine pipelines and conventional fan-shaped display image height quantification method
As can be seen from the comparison results disclosed in Table 1, the quantitative accuracy of the quantitative method for detecting the weld defect AUT of the submarine pipeline on the height of the weld defect is obviously higher than that of the conventional fan-shaped display image height quantitative method.
As an alternative embodiment, in the image adjustment step, the method further comprises adjusting the color lump amplitude of the fan-shaped display to make the center color lump 21 amplitude of the weld defect in the fan-shaped display be 70% -90%. Preferably, the patch amplitude of the fan-shaped display is adjusted so that the center patch 21 of the weld defect in the fan-shaped display has an amplitude of 80%.
In the actual fan-shaped display, if the highest amplitude of the center color block 21 of the weld defect is lower than 20%, the color block distinction of the weld defect in the fan-shaped display is not clear, the quantification of the weld defect in the submarine pipeline is not easy to be carried out, the gain needs to be improved, the amplitude of the center color block 21 of the weld defect in the fan-shaped display is 70% -90%, and preferably, the amplitude of the center color block 21 of the weld defect in the fan-shaped display is 80%, so that the quantification of the weld defect is easier to be carried out.
The foregoing embodiments are only described with respect to implementation of the corresponding steps in the detailed description, and then, in case of no conflict in logic, the foregoing embodiments may be combined with each other to form a new technical solution, where the new technical solution is still within the scope of disclosure of this detailed description.
In a second broad aspect of the present invention, there is provided a submarine pipeline weld defect AUT detection and quantification system, wherein the submarine pipeline weld defect AUT detection and altitude quantification system according to an embodiment includes:
the image acquisition module 100 is used for acquiring an ultrasonic detection display image, wherein the display image comprises a fan-shaped display, an A-type display and a B-type display;
the image adjustment module 200 is used for adjusting the scaling of the fan-shaped display so that the fan-shaped display can display the color change of the weld defect, the upper surface position of the weld defect and the lower surface position of the weld defect;
a center position determination module 300 of the weld defect, wherein the center position determination module of the weld defect is used for moving the circumferential position pointer and the angle pointer 40 to enable the angle pointer 40 to be positioned at the center position 23 of the center color block of the weld defect;
the central position information acquisition module 400 of the central color block of the weld defect is used for moving the reference pointer 50 to the central position 23 of the central color block of the weld defect to acquire the central position 23 information of the central color block of the weld defect, and the position information of the central color block of the weld defect comprises the central position 23 depth information of the central color block of the weld defect;
the depth information calculation module of the weld defect is used for acquiring the depth information of the weld defect according to the depth information of the center position 23 of the center color block of the weld defect;
the measuring pointer position information obtaining module 500 is used for moving the measuring pointer 60 to the edge of the gradient color block 22 adjacent to the center color block of the weld defect towards the outer surface direction of the pipeline weld, and obtaining the position information of the measuring pointer 60;
the weld defect height information obtaining module 600 is configured to obtain the weld defect height information according to the position information of the measurement pointer 60.
Optionally, in the subsea pipeline weld defect AUT detection height quantification system of this embodiment, in the center position 23 information acquisition module of the center color block of the weld defect, moving the reference pointer 50 to the center position 23 of the center color block of the weld defect is moving the reference pointer 50 to the intersection of the angle pointer and the center position of the center color block of the weld defect.
Optionally, in the subsea pipeline weld defect AUT detection height quantification system of this embodiment, in the weld defect depth information calculation module, the depth value of the weld defect is 2 pipeline wall thickness values minus a depth value of a center position 23 of a center color block of the weld defect.
Optionally, in the subsea pipeline weld defect AUT detection height quantification system of this embodiment, in the weld defect height information acquisition module, the height value of the weld defect is an absolute value of a difference between the depth value of the measurement pointer 60 and the depth value of the reference pointer 50.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product, which is carried in a non-volatile computer readable storage carrier (such as ROM, magnetic disk, optical disk, server storage space) and includes several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to execute the method flow and the system architecture according to the embodiments of the present invention.
According to the AUT detection and quantification system for the weld defects of the submarine pipeline, aiming at the AUT detection of the submarine pipeline, based on the display characteristics of the AUT detection, the color change of the defect image in the fan-shaped display is utilized to accurately quantify the defect size, so that the accuracy of quantifying the height of the weld defects is improved, the problem of large quantifying error of the height of the defect in the traditional fan-shaped AUT detection is solved, the quantitative operation is simple, no complex data operation is caused, the hardware requirement on the quantitative system is reduced, the AUT detection and quantification precision of welding of the weld of the submarine pipeline is greatly improved, and the welding quality of the submarine pipeline is ensured; and the AUT detection can meet the requirements of ECA acceptance standards on detection precision, so that the repair rate caused by large quantitative errors of weld defects is reduced, and the laying efficiency of submarine pipelines is improved.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (4)
1. The full-automatic ultrasonic detection and quantification method for the weld defects of the submarine pipeline is characterized by comprising the following steps of:
an image acquisition step of acquiring an ultrasonic detection display image, wherein the display image comprises sector display, A-type display and B-type display;
an image adjustment step of adjusting the scaling of the fan-shaped display so that the fan-shaped display can display the color change of the weld defect, the upper surface position of the weld defect and the lower surface position of the weld defect; in the image adjustment step, the method further comprises the step of adjusting the color block amplitude of the fan-shaped display to enable the center color block amplitude of the welding seam defect in the fan-shaped display to be 70% -90%;
a step of determining the central position of the weld defect, wherein the step of determining the central position of the weld defect is to move a circumferential position pointer and an angle pointer to enable the angle pointer to be positioned at the central position of a central color block of the weld defect;
a step of acquiring center position information of a center color block of a weld defect, wherein the step of acquiring center position information of the center color block of the weld defect is to move a reference pointer to the center position of the center color block of the weld defect, acquire the center position information of the center color block of the weld defect, and the center position information of the center color block of the weld defect comprises a depth value of the center position of the center color block of the weld defect;
a depth information calculation step of a weld defect, wherein the depth information calculation step of the weld defect is to acquire the depth information of the weld defect according to the central position depth information of a central color block of the weld defect; in the depth information calculation step of the weld defect, the depth value of the weld defect is 2 times of the thickness value of the pipeline wall minus the depth value of the central position of the central color block of the weld defect;
a measuring pointer position information obtaining step, wherein the measuring pointer position information obtaining step is to move a measuring pointer to the edge of a gradient color block adjacent to a center color block of the weld defect towards the outer surface direction of the pipeline weld, and obtain the measuring pointer position information;
a weld defect height information calculation step, wherein the weld defect height information calculation step is to acquire the weld defect height information according to the position information of the measuring pointer; in the welding seam defect height information calculating step, the height value of the welding seam defect is the absolute value of the difference value between the depth value of the measuring pointer and the depth value of the reference pointer; the depth value of the reference pointer is the depth value of the center position of the center color block of the weld defect.
2. The full-automatic ultrasonic detection and quantification method for weld defects of submarine pipelines according to claim 1, wherein the step of moving the reference pointer to the center position of the center color block of the weld defects is to move the reference pointer to the junction of the angle pointer and the center position of the center color block of the weld defects.
3. The full-automatic ultrasonic detection and quantification system for the welding line defects of the submarine pipeline is characterized by comprising the following modules:
the image acquisition module is used for acquiring an ultrasonic detection display image, and the display image comprises sector display, A-type display and B-type display;
the image adjustment module is used for adjusting the scaling of the fan-shaped display so that the fan-shaped display can display the color change of the weld defect, the upper surface position of the weld defect and the lower surface position of the weld defect; the image adjustment module is also used for adjusting the color block amplitude of the fan-shaped display to enable the center color block amplitude of the welding seam defect in the fan-shaped display to be 70% -90%;
the center position determining module of the weld defect is used for moving a circumferential position pointer and an angle pointer to enable the angle pointer to be positioned at the center position of the center color block of the weld defect;
the center position information acquisition module of the center color block of the weld defect is used for moving a reference pointer to the center position of the center color block of the weld defect to acquire the center position information of the center color block of the weld defect, and the center position information of the center color block of the weld defect comprises a depth value of the center position of the center color block of the weld defect;
the welding seam defect depth information calculation module is used for acquiring the depth information of the welding seam defect according to the central position depth information of the central color block of the welding seam defect; in a depth information calculation module of the weld defect, subtracting a depth value of a central position of a central color block of the weld defect from a depth value of the weld defect which is 2 times of a pipeline wall thickness value;
the measuring pointer position information acquisition module is used for moving the measuring pointer to the gradient color block edge adjacent to the center color block of the weld defect towards the outer surface direction of the pipeline weld so as to acquire the measuring pointer position information;
the weld defect height information acquisition module is used for acquiring the weld defect height information according to the position information of the measuring pointer; in the weld defect height information acquisition module, the height value of the weld defect is the absolute value of the difference value between the depth value of the measuring pointer and the depth value of the reference pointer; the depth value of the reference pointer is the depth value of the center position of the center color block of the weld defect.
4. The full-automatic ultrasonic detection and quantification system for the weld defect of the submarine pipeline according to claim 3, wherein in the central position information acquisition module of the central color block of the weld defect, the reference pointer is moved to the central position of the central color block of the weld defect by moving the reference pointer to the joint of the angle pointer and the central position of the central color block of the weld defect.
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| WO2017165010A2 (en) * | 2016-02-09 | 2017-09-28 | Huggett Daniel J | On-line phased array ultrasonic testing system for friction stir welding applications |
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