NL2024691A - Method for spatially positioning crack in t-joint weldment - Google Patents

Method for spatially positioning crack in t-joint weldment Download PDF

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NL2024691A
NL2024691A NL2024691A NL2024691A NL2024691A NL 2024691 A NL2024691 A NL 2024691A NL 2024691 A NL2024691 A NL 2024691A NL 2024691 A NL2024691 A NL 2024691A NL 2024691 A NL2024691 A NL 2024691A
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crack
weld
tip
mathematical model
weldment
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NL2024691A
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Dutch (nl)
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NL2024691B1 (en
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Shi Duanhu
Wu Sanhai
Zhao Hongfeng
Sha Jing
Li Changyun
Xu Lei
Yang Feng
He Min
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Xuzhou Inst Technology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
    • G01N23/044—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using laminography or tomosynthesis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/30—Accessories, mechanical or electrical features
    • G01N2223/33—Accessories, mechanical or electrical features scanning, i.e. relative motion for measurement of successive object-parts
    • G01N2223/3306—Accessories, mechanical or electrical features scanning, i.e. relative motion for measurement of successive object-parts object rotates
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/60—Specific applications or type of materials
    • G01N2223/629—Specific applications or type of materials welds, bonds, sealing compounds

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  • Arc Welding In General (AREA)

Abstract

The present invention disclosures a method for spatially positioning a crack in a T-joint weldment, which belongs to the technical field of weldment detection. In the method, firstly, the T-joint weldment is rotated left and right to obtain the left and right rotation images by the X-ray detection. According to the geometric relationship between the parts of the detected image, the mathematical model for calculating the depth and the offset of the crack defect in the T-joint weldment is established. According to the above model, the depths h₁, h₂ and the offsets x₁, x₂ of the two ends of the crack tip, the offset x of the middle point of the crack and the inclination angle θ of the crack in the T-joint weldment are determined respectively. The distribution of the crack defect along the length direction of the welding line can be obtained by image processing, thereby realizing the spatial positioning of the crack defect in the T-joint weldment.

Description

METHOD FOR SPATIALLY POSITIONING CRACK IN T-JOINT WELDMENT TECHNICAL FIELD
The present invention relates to a method for spatially positioning a crack in a weldment, which belongs to the technical field of weldment detection.
BACKGROUND
At present, the inventor has carried out the research on spatially positioning the bulk-type defect in the weldment by adopting the X-ray multi-view imaging method, and realized the automatic extraction and visualization of the spatial position data of the bulk-type defect in batch. The problems existing in the translation parallax method and the double exposure method with the aid of lead mark are eliminated, such as great operation difficulty, large measurement error, large error transmission and others. Crack is a area-type defect, which commonly exists in welded joints and has a great impact on the safety of important welded structures.
However, using the X-ray detection method to carry out the research on spatially positioning the crack and other area-type defects in the weldment has not been reported at home and abroad. Therefore, the present invention of a method for spatially positioning the crack in the T-joint weldment (see FIG. 1) without the aid of marked points has extremely important theoretical and practical significance as well as broad engineering application prospects, which may be popularized and applied to ordinary welded joints.
SUMMARY
In order to overcome the shortcomings of the prior art above, the present invention provides a method for spatially positioning a crack in a T-joint weldment. The method can conveniently realizes the spatial positioning of the crack in the T-joint weldment and has high positioning accuracy and strong adaptability, which has a good prospect of engineering application.
The present invention is realized by the following technical solution. A method for spatially positioning a crack in a T-joint weldment, which can realize the spatial positioning of the crack in the T-joint weldment, includes the following steps:
1) rotating the T-joint weldment left and right to obtain left and right rotation images by a X-ray detection.
2) by a geometric relationship between each part in the detected left and right rotation images, establishing a mathematical model of depths and offsets of two ends of a crack tip;
3) according to the above model, determining the depths Ai, hi and the offsets xi, xi of the two ends of the crack tip, a offset x of a middle point of the crack and a inclination angle Θ of the crack in the T-joint weldment, respectively;
4) finally, obtaining a distribution of the crack defect along a length direction of a welding line by image processing, thereby realizing the spatial positioning of the crack defect in the Tjoint weldment.
Further, in the step 2), a thinnest position of the weldment penetrated by the X-ray penetration is selected as a positioning characteristic point, and a mathematical model of the depths and the offsets of the two ends of the crack tip is established.
Further, in the step 2), the mathematical model for calculating the offsets of the two ends of the crack tip is as follows:
Λ| — sin a _ dt2-dr2 sin a
The mathematical model for calculating the offset of the middle point of the crack is as follows:
X. + X, x = —--2
When x>0, the middle point of the crack is located on the right side of a center line of a web plate of the T-joint weldment. When x=0, the middle point of the crack lies on the center line of the web plate of the T-joint weldment. When x<0, the middle point of the crack is located on the left side of the center line of the web plate of the T-joint weldment.
The mathematical model for calculating the depths of the crack tip is as follows:
r d,, W . c cos a 2 d W h2=^-(T- + x2) + d cosa 2 where, hi, hi represent the depths of the two ends Ai, A 2 of the crack tip in the T-joint weldment, that is, the distances (mm) from the two ends of the crack tip to the lower surface of the wing plate of the T-joint weldment calculated by the formula;
xi, X2 represent the distances from the two ends Ai, A2 of the crack tip in the T-joint weldment to the center line of the web plate, namely, the offsets (mm) of the two ends of the crack tip;
x represents the distance from the middle point of the crack in the T-joint weldment to the center line of the web plate, namely, the offset (mm) of the middle point of the crack;
dn, dn represent the projection distance (mm) from the two ends Ai, A2 of the crack tip to the thinnest position of the weldment penetrated by the X-ray penetration when the T-joint weldment is rotated right;
dr], dr2 represent the projection distance (mm) from the two ends Ai, A2 of the crack tip to the thinnest position of the weldment penetrated by the X-ray penetration when the T-joint weldment is rotated left;
a represents the angle of the left and right rotation of the T-joint weldment;
W represents the width (mm) of the web plate of the T-joint weldment;
Θ represents the angle between the line connecting the two ends of the crack and the horizontal line.
Further, when a=45°, the mathematical model for calculating the offsets of the two ends of the crack tip is as follows:
_dii~drl 2
When a=45°, the mathematical model for calculating the depths of the crack tip is as follows:
/¾ = \[ïd!} - (^- + Xj) + δ
I- W h2 = d2dl2 - (— + x2) + δ
Furthermore, if Λ #/22, the inclination angle of the crack need be calculated.
If hi>h2, the inclination angle Θ is above the horizontal line.
Otherwise» if h\<hi, the inclination angle Θ is below the horizontal line.
The mathematical model for calculating the inclination angle Θ between a line connecting the two ends of the crack tip and the horizontal line is as follows:
I/?, - ^1
Θ = arctanJL x, -x2
Further, in the step 2), the width W of the web plate and the thickness δ of the wing plate of the T-joint weldment are measured in advance, and the du, di2, dri and dr2 are automatically obtained after segmenting and extracting the defect in the detected images.
As an application of the present invention, the method for spatially positioning the crack in the T-joint weldment can also be applied to the spatial positioning of the area-type defect in the formed parts such as T-shaped castings and forgings.
The advantages of the present invention are as follows. By adopting the method of the present invention for spatially positioning the crack in the T-joint weldment, the spatial positioning of the crack defect in the T-joint weldment can be realized. The present invention is also applicable to the spatial positioning of other area-type defects in the T-joint weldment. The present invention has the advantages of simple operation, having high positioning accuracy, strong adaptability and wide application. The present invention can be popularized to the spatial positioning of the area-type defects in other welded joints and applied to the spatial positioning of the area-type defects in the formed parts such as T-shaped castings and forgings, which has a good prospect of engineering application.
BRIEF DESCRIPTION OF THE DRAWING
The present invention is further described below in conjunction with the drawings and embodiment.
FIG. 1 is a schematic diagram of the T-joint weldment.
FIG. 2 shows the mathematical model for calculating the depths of the two ends Ai, A 2 of the crack tip in the T-joint weldment.
FIG. 3 shows the mathematical model for calculating the offsets of the two ends Ai, Ag of the crack tip in T-joint weldment.
FIG. 4 shows the model of the inclination angle of the crack in the weldment.
In the figure: 1. web plate; 2. wing plate; 3. welding line; 4. crack; 5. X-ray incident direction.
DETAILED DESCRIPTION OF THE EMBODIMENT
The present invention is further described below in conjunction with the embodiment.
A method for spatially positioning a crack in a T-joint weldment, which can realize the spatial positioning of the crack in the T-joint weldment, includes the following steps.
1) The T-joint weldment is rotated left and right to obtain the left and right rotation images by the X-ray detection.
2) By the geometric relationship between the parts in the detected left and right rotation images, the mathematical model of the depths and the offsets of the two ends of the crack tip is established.
3) According to the above model, the depths hi, hi and the offsets xi, xi of the two ends of the crack tip, the offset x of the middle point of the crack and the inclination angle Θ of the crack in the T-joint weldment are determined respectively.
4) Finally, the distribution of the crack defect along the length direction of the welding line by image processing is obtained, thereby realizing the spatial positioning of the crack defect in the T-joint weldment.
Further, in the step 2), the thinnest position of the weldment penetrated by the X-ray penetration is selected as the positioning characteristic point, and the mathematical model of the depths and the offsets of the two ends of the crack tip is established.
Further, in the step 2), as shown in FIG. 3, the mathematical model for calculating the offsets of the two ends of the crack tip is as follows:
v _ dll ~dri
Λ| — sin a _ dt2-dr2 sin a
The mathematical model for calculating the offset of the middle point of the crack is as follows:
X. + X, x = —--2
When x>0, the middle point of the crack is located on the right side of the center line of the web plate of the T-joint weldment. When x=0, the middle point of the crack lies on the center line of the web plate of the T-joint weldment. When x<0, the middle point of the crack is located on the left side of the center line of the web plate of the T-joint weldment.
As shown in FIG. 2, the mathematical model for calculating the depths of the crack tip is as follows:
A, =——(—+ x,) + J cos a 2 dW h, = JU—++ cos a2 where, /?i, /?2 represent the depths of the two ends Ai, A2 of the crack tip in the T-joint weldment, that is, the distances (mm) from the two ends of the crack tip to the lower surface of the wing plate of the T-joint weldment calculated by the formula;
xy, X2 represent the distances from the two ends Ai, A2 of the crack tip in the T-joint weldment to the center line of the web plate, namely, the offsets (mm) of the two ends of the crack tip;
x represents the distance from the middle point of the crack in the T-joint weldment to the center line of the web plate, namely, the offset (mm) of the middle point of the crack;
du, di2 represent the projection distance (mm) from the two ends Ai, A2 of the crack tip to the thinnest position of the weldment penetrated by the X-ray penetration when the T-joint weldment is rotated right;
dri, dr2 represent the projection distance (mm) from the two ends Ai, A2 of the crack tip to the thinnest position of the weldment penetrated by the X-ray penetration when the T-joint weldment is rotated left;
a represents the angle of the left and right rotation of the T-joint weldment;
W represents the width (mm) of the web plate of the T-joint weldment;
Θ represents the angle between the line connecting the two ends of the crack and the horizontal line.
Further, when a=45°, the mathematical model for calculating the offsets of the two ends of the crack tip is as follows:
1_
Figure NL2024691A_D0001
When «=45°, the mathematical model for calculating the depths of the crack tip is as follows:
r- W h} = V2i/n -(— + x,) + δ r- W h2 = \Zdl2 -(—+ x2) + J
Furthermore, if h\±!n, the inclination angle of the crack need be calculated.
As shown in FIG. 4, if the inclination angle Θ is above the horizontal line.
Otherwise, if Zzi</?2, the inclination angle Θ is below the horizontal line.
The mathematical model for calculating the inclination angle Θ between the line connecting the two ends of the crack tip and the horizontal line is as follows:
I/?. -λ2|
Θ = arctanJL
Xl-X2
Further, in the step 2), the width W of the web plate and the thickness δ of the wing plate of the T-joint weldment are measured in advance, and the du, d.12, d,-i and dr2 are automatically obtained after segmenting and extracting the defect in the detected images.
As an application of the present invention, the method for spatially positioning the crack in the T-joint weldment can also be applied to the spatial positioning of the area-type defect in the formed parts such as T-shaped castings and forgings.
The present invention provides the method for spatially positioning the crack defect in Tjoint weldment. In the method, firstly, the T-joint weldment is rotated left and right to obtain the left and right rotation images by the X-ray detection. According to the geometric relationship between the parts of the detected image, the mathematical model for calculating the depth and the offset of the crack defect in the T-joint weldment is established. According to the above model, the depths h\, hi and the offsets xi, xi of the two ends of the crack tip, the offset x of the middle point of the crack and the inclination angle Θ of the crack in the T-joint weldment are determined respectively, wherein, the width W of the web plate and the thickness ό of the wing plate of the T-joint weldment may be measured in advance, and the du, du, d,-i and dr2 are automatically obtained after segmenting and extracting the defect in the detected images. The distribution of the crack defect along the length direction of the welding line can be obtained by image processing, thereby realizing the spatial positioning of the crack defect in the T-joint weldment.
By adopting the method of the present invention for spatially positioning the crack in the T-joint weldment, the spatial positioning of the crack defect in the T-joint weldment can be realized. The present invention can be popularized to the spatial positioning of the area-type defects in other welded joints and applied to the spatial positioning of the area-type defects in the formed parts such as T-shaped castings and forgings, which has a good prospect of engineering application.

Claims (4)

CONCLUSIESCONCLUSIONS 1. Een werkwijze voor de ruimtelijke plaatsbepaling van een scheur in een T-las, waarbij:A method of spatial location determination of a crack in a T-weld, where: de werkwijze de ruimtelijke plaatsbepaling van de scheur in de T-las kan realiseren en de volgende stappen omvat:the method can realize the spatial location of the crack in the T-weld and comprises the following steps: 1) het roteren van de T-las naar links en rechts om rotatiebeelden van links en rechts te verkrijgen door een röntgendetectie;1) rotating the T-weld to the left and right to obtain left and right rotation images by X-ray detection; 2) met een geometrische relatie tussen elk deel in de gedetecteerde rotatiebeelden van links en rechts, een wiskundig model van diepten en bochten van twee uiteinden van een scheurtip vaststellen;2) with a geometric relationship between each part in the detected rotation images from left and right, establish a mathematical model of depths and curves of two ends of a crack tip; 3) volgens het bovenstaande model, het respectievelijk bepalen van de diepten hi, h2 en de bochten xi, X2 van de twee uiteinden van de scheurtip, een bocht x van een middelpunt van de scheur en een hellingshoek Θ van de scheur in de T-las; en3) according to the above model, determining the depths hi, h2 and the bends xi, X2 of the two ends of the crack tip, a bend x of a midpoint of the crack and an angle of inclination Θ of the crack in the T- read; and 4) ten slotte, het verkrijgen van een verdeling van het scheurdefect langs een lengterichting van een laslijn door beeldverwerking, waardoor de ruimtelijke plaatsbepaling van het scheurdefect in de T-las wordt gerealiseerd.4) finally, obtaining a distribution of the crack defect along a longitudinal direction of a weld line by image processing, thereby realizing the spatial location of the crack defect in the T-weld. 2. Werkwijze voor de ruimtelijke plaatsbepaling van de scheur in de T-las volgens conclusie 1, waarbij: in stap 2) een dunste plaats van de las die door de röntgenpenetratie wordt gepenetreerd, wordt gekozen als een karakteristiek plaatsingspunt, en een wiskundig model van de diepten en de bochten van de twee uiteinden van de scheurtip wordt vastgesteld.The method for spatially locating the T-weld crack according to claim 1, wherein: in step 2) a thinnest spot of the weld penetrated by the X-ray penetration is selected as a characteristic placement point, and a mathematical model of the depths and curves of the two ends of the crack tip are determined. 3. De werkwijze voor de ruimtelijke plaatsbepaling van de scheur in de T-las volgens conclusie 1 of 2, waarbij: in stap 2) het wiskundige model voor het berekenen van de bochten van de twee uiteinden van de scheurtip als volgt is:The method for spatial location of the T-weld crack according to claim 1 or 2, wherein: in step 2) the mathematical model for calculating the bends of the two ends of the crack tip is as follows: v _ ~^rl v _ ~ ^ rl X| 2 sin a χ _ ~drl X | 2 sin a χ _ ~ d rl 2 sin a het wiskundige model voor het berekenen van de bocht van het middelpunt van de scheur als volgt is:2 sin a is the mathematical model for calculating the bend of the center of the crack as follows: x, + x, x = —1---2 ;x, + x, x = - 1 --- 2; wanneer x > 0, bevindt het middelpunt van de scheur zich aan de rechterkant van een middellijn van een lijfplaat van de T-las; wanneer x = 0, ligt het middelpunt van de scheur op de middellijn van de lijfplaat van de T-las; wanneer x < 0, bevindt het middelpunt van de scheur zich aan de linkerkant van de middellijn van de lijfplaat van de T-las;when x> 0, the center of the crack is to the right of a centerline of a T-weld web plate; when x = 0, the center of the crack is on the centerline of the T-weld web plate; when x <0, the center of the crack is on the left side of the centerline of the T-weld web plate; het wiskundige model voor het berekenen van de diepten van de scheurtip als volgt is:the mathematical model for calculating crack tip depths is as follows: A =—— -(— + *,) + <?A = —— - (- + *,) + <? cosa 2 , dn W . _cosa 2, d n W. _ Λ, = —---(--h x2) + δ cosa 2 waarbij hi, h2 de diepten van de twee uiteinden Ai, A2 van de scheurtip in de Tlas vertegenwoordigen, dat wil zeggen, de afstanden (mm) van de twee uiteinden van de scheurtip tot het onderste oppervlak van de vleugelplaat van de T-las berekend met de formule;Λ, = —--- (- hx 2 ) + δ cosa 2 where hi, h2 represent the depths of the two ends Ai, A2 of the crack tip in the Tlas, that is, the distances (mm) of the two ends of the crack tip to the bottom surface of the wing plate of the T-weld calculated by the formula; xi, X2 vertegenwoordigen de afstanden van de twee uiteinden Ai, A2 van de scheurtip in de T-las naar de middellijn van de lijfplaat, namelijk de bochten (mm) van de twee uiteinden van de scheurtip;xi, X2 represent the distances from the two ends Ai, A2 of the tear tip in the T-weld to the centerline of the web plate, namely the bends (mm) of the two ends of the tear tip; x staat voor de afstand van het middelpunt van de scheur in de T-las naar de middellijn van de lijfplaat, namelijk de bocht (mm) van het middelpunt van de scheur;x represents the distance from the center of the crack in the T-weld to the centerline of the web, that is, the bend (mm) of the center of the crack; dn, di2 vertegenwoordigen de projectieafstand (mm) van de twee uiteinden Ai, A2 van de scheurtip tot de dunste plaats van de las die door de röntgenpenetratie wordt gepenetreerd wanneer de T-las naar rechts wordt gedraaid;dn, di2 represent the projection distance (mm) of the two ends Ai, A2 from the tear tip to the thinnest spot of the weld penetrated by the X-ray penetration when the T-weld is turned to the right; dri, dr2 vertegenwoordigen de projectieafstand (mm) van de twee uiteinden Ai, A2 van de scheurtip tot de dunste plaats van de las die door de röntgenpenetratie wordt gepenetreerd wanneer de T-las naar links wordt gedraaid;dri, dr2 represent the projection distance (mm) from the two ends A1, A2 of the tear tip to the thinnest spot of the splice penetrated by the X-ray penetration when the T-splice is turned to the left; a vertegenwoordigt de hoek van de linker- en rechterrotatie van de T-las;a represents the angle of the left and right rotation of the T-weld; W vertegenwoordigt de breedte (mm) van de lijfplaat van de T-las; enW represents the width (mm) of the T-weld web plate; and Θ vertegenwoordigt de hoek tussen de lijn die de twee uiteinden van de scheur verbindt en de horizontale lijn.Θ represents the angle between the line connecting the two ends of the crack and the horizontal line. 4. Werkwijze voor de ruimtelijke plaatsbepaling van de scheur in de T-las volgens conclusie 3, waarbij:A method for spatial location of the T-weld crack according to claim 3, wherein: wanneer a = 45°, het wiskundige model voor het berekenen van de bochten van de twee uiteinden van de scheurtip als volgt is:when a = 45 °, the mathematical model for calculating the bends of the two ends of the crack tip is as follows: _ dg ~drl A2 I— 'l'2· ; en wanneer a = 45°, het wiskundige model voor het berekenen van de diepten van de scheurtip als volgt is:dg ~ d rl A 2 I - 'l' 2 ·; and when a = 45 °, the mathematical model for calculating the depth of the crack tip is as follows: /—/ - 1\=Α 2dn - (— + ^) + /) h2 = y[2d!2 - (^- + x,) + δ1 \ = Α 2d n - (- + ^) + /) h 2 = y [2d ! 2 - (^ - + x,) + δ 5. Werkwijze voor de ruimtelijke plaatsbepaling van de scheur in de T-las volgens conclusie 3 of 4, waarbij: indien hi + h2, de hellingshoek van de scheur moet worden berekend;A method of spatial location of the crack in the T-weld according to claim 3 or 4, wherein: if hi + h2, the slope angle of the crack is to be calculated; indien hi > h2, de hellingshoek Θ boven de horizontale lijn ligt;if hi> h2, the angle of inclination Θ is above the horizontal line; anders, als hi < h2, de hellingshoek Θ onder de horizontale lijn ligt; en het wiskundige model voor het berekenen van de hellingshoek Θ tussen de lijn die de twee uiteinden van de scheurtip verbindt en de horizontale lijn als volgt is:otherwise, if hi <h2, the angle of inclination Θ is below the horizontal line; and the mathematical model for calculating the angle of inclination Θ between the line joining the two ends of the crack tip and the horizontal line is as follows: Θ = arctanJ-----— x( - x2 Θ = arctan J -----— x ( - x 2 6. Werkwijze voor de ruimtelijke plaatsbepaling van de scheur in de T-las volgens conclusie 1, waarbij: in stap 2) de breedte H/ van de lijfplaat en de dikte ö van de vleugelplaat van de T-las vooraf zijn gemeten, en de du, di2, dri en dr2 automatisch worden verkregen na het segmenteren en extraheren van het defect in de gedetecteerde beelden.A method for the spatial location of the crack in the T-weld according to claim 1, wherein: in step 2) the width H / of the web plate and the thickness ö of the wing plate of the T-weld are pre-measured, and the du, di2, dri and dr2 are automatically obtained after segmenting and extracting the defect in the detected images. 7. Werkwijze voor de ruimtelijke plaatsbepaling van de scheur in de T-las volgens conclusie 1, waarbij: de werkwijze voor de ruimtelijke plaatsbepaling van de scheur in de T-las ook kan worden toegepast op de ruimtelijke plaatsbepaling van het gebiedstype defect in de gevormde stukken zoals T-vormige gietstukken en smeedstukken.The method for spatially locating the crack in the T-weld according to claim 1, wherein: the method for spatially locating the crack in the T-weld can also be applied to the spatial locating of the area type defect in the formed pieces such as T-shaped castings and forgings.
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