CN103901100B - A kind of ultrasonic flaw detection localization method and ultra-sonic defect detector - Google Patents
A kind of ultrasonic flaw detection localization method and ultra-sonic defect detector Download PDFInfo
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- CN103901100B CN103901100B CN201410112401.6A CN201410112401A CN103901100B CN 103901100 B CN103901100 B CN 103901100B CN 201410112401 A CN201410112401 A CN 201410112401A CN 103901100 B CN103901100 B CN 103901100B
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Abstract
The present invention relates to UT (Ultrasonic Testing) technical field, particularly relate to a kind of ultrasonic flaw detection localization method and ultra-sonic defect detector, comprise echo detecting circuit, described echo detecting circuit connects ultrasonic probe, described ultrasonic probe is fixedly connected with support, described support is arranged the reference substance with ultrasonic probe interlock, reference substance is utilized to obtain first bee-line of ultrasonic probe to weld seam distal edge line, to be popped one's head in the first bee-line of weld seam distal edge line and ultrasonic probe the second bee-line to reference point by contrast echo ripple, coordinate the degree of depth of reflection spot again, directly can obtain the positional information of the relative section of weld joint of reflection spot, the i.e. position of the relative section of weld joint of defect, reduce the workload of on-the-spot carrying out flaw detection, reduce the dependence to operating personnel's subjective judgement, reduce the False Rate to defective locations and character.
Description
Technical field
The present invention relates to UT (Ultrasonic Testing) technical field, particularly relate to a kind of ultrasonic flaw detection localization method and ultra-sonic defect detector.
Background technology
At present, weld seam detection many employings defect detection on ultrasonic basis of metal works.UT (Ultrasonic Testing) utilizes ultrasonic wave energy to penetrate metal works depths, and when entering another medium by a medium, the feature that interface can occur reflect finds a kind of method of defect, when the ultrasonic beam sent when popping one's head in runs into defect in metal works inside, reflection wave will be produced, and pulse waveform is formed on video screen, the position of defect and equivalent can be judged according to the position of these pulse waveforms, height and dynamic form and infer its character further.(Defect Equivalent refers to that dissimilar can, with coming quite with it with the return voltage on certain standard geometry reflecting body of sound path, if both return voltages are identical, then be all identical equivalent both with the return voltage of the defect of size.The actual size of general defect is larger than the equivalent determined.) but this judges that conclusion generally needs reviewer to carry out repeated detection operation, and to draw in conjunction with experience, length consuming time and rely on operating personnel's subjective judgement, poor reliability.
Summary of the invention
The object of the invention is to propose a kind of ultrasonic flaw detection localization method and ultra-sonic defect detector, directly can obtain the position of the relative section of weld joint of defect, reduce the workload of on-the-spot carrying out flaw detection, reduce the dependence to operating personnel's subjective judgement, reduce the False Rate to defective locations and character.
For reaching this object, the present invention by the following technical solutions:
First aspect, provides a kind of ultrasonic flaw detection localization method, comprising:
Obtain reference substance with ultrasonic probe interlock to the bee-line of weld seam distal edge line, according to described bee-line acquisition ultrasonic probe to the first bee-line of weld seam distal edge line; Wherein, described weld seam is weld seam near side (ns) line near a sideline of ultrasonic probe, and described weld seam is weld seam distal edge line away from a sideline of ultrasonic probe;
Obtain ultrasonic probe deflection angle according to described bee-line and reference substance spacing, obtain second bee-line of reference point to ultrasonic probe according to the reflection spot in described ultrasonic probe deflection angle and weld seam to the front end distance of ultrasonic probe; Wherein, reflection spot in described weld seam is reference point at the vertical projection point of detection faces, described reference point is the 3rd bee-line to the bee-line of the first bee-line, the intersection point of described 3rd bee-line and described first bee-line is described reference point, and described detection faces is the workpiece test surface of ultrasonic probe incidence;
According to the degree of depth of described first bee-line, the second bee-line and reflection spot, obtain the position of the relative section of weld joint of reflection spot.
Wherein, the reference substance that described acquisition links with ultrasonic probe, to the bee-line of weld seam distal edge line, comprising:
Obtain the echoed signal of the sensor with ultrasonic probe interlock, obtain the bee-line of described sensor to weld seam distal edge line according to described echoed signal.
Wherein, the reference substance that described acquisition links with ultrasonic probe, to the bee-line of weld seam distal edge line, comprising:
If workpiece is plate, then obtain reference substance with ultrasonic probe interlock to the bee-line of reference surface, described reference surface is perpendicular to detection faces and through the surface of weld seam distal edge line;
If workpiece is vertically T-shaped, then obtain reference substance with ultrasonic probe interlock to the bee-line of reference surface, described reference surface is perpendicular to detection faces and the surface of the work of close ultrasonic probe;
If workpiece is tiltedly T-shaped, then obtain reference substance with ultrasonic probe interlock to the bee-line of reference surface, described reference surface is favour detection faces and the surface of the work of close ultrasonic probe.
Wherein, the reference substance that described acquisition links with ultrasonic probe, to the bee-line of weld seam distal edge line, obtains ultrasonic probe to the first bee-line of weld seam distal edge line according to described bee-line, comprising:
Obtain the echoed signal of two sensors with ultrasonic probe interlock, described ultrasonic probe is in the point midway of line between two sensors, obtains two sensors respectively to the bee-line of weld seam distal edge line, be designated as L according to described echoed signal
1and L
2;
Remember that described ultrasonic probe is L' to the first bee-line of weld seam distal edge line, according to L'=(L
1+ L
2)/2, obtain first bee-line of ultrasonic probe to weld seam distal edge line.
Wherein, described according to described bee-line and reference substance spacing acquisition ultrasonic probe deflection angle, according to the reflection spot in described ultrasonic probe deflection angle and weld seam to ultrasonic probe front end distance obtain reference point to the second bee-line of ultrasonic probe, comprising:
Remember that two sensors divide the bee-line being clipped to weld seam distal edge line to be L
1and L
2, the spacing of two sensors is S, and when sensor links with ultrasonic probe, the deflection angle of two sensor lines is α, ultrasonic probe rotate time ultrasonic probe deflection angle be β, according to β=α=arcsin (| L
1-L
2|/S), obtain ultrasonic probe deflection angle;
Reflection spot in note weld seam is LA to the front end distance of ultrasonic probe, and reference point is La to the second bee-line of ultrasonic probe, according to La=LA × cos β, obtains the second bee-line.
Wherein, the described degree of depth according to described first bee-line, the second bee-line and reflection spot, after obtaining the position of the relative section of weld joint of reflection spot, also comprises:
Show section of weld joint image on a display screen, in described section of weld joint image, show the position of reflection spot.
Wherein, describedly show section of weld joint image on a display screen, in described section of weld joint image, show the position of reflection spot, comprising:
The degree of depth of note reflection spot is DA, and the thickness of workpiece of detection faces is T, and the display depth showing reflection spot in section of weld joint image is d; If DA≤T, then d=DA; If T<DA≤2T, then d=2T-DA; If 2T<DA≤3T, then d=DA-2T; If 3T<DA≤4T, then d=4T-DA.
Second aspect, provides a kind of ultra-sonic defect detector, comprises echo detecting circuit, and described echo detecting circuit connects ultrasonic probe, and described ultrasonic probe is fixedly connected with support, described support is arranged the reference substance with ultrasonic probe interlock,
Described echo detecting circuit, for obtaining reference substance with ultrasonic probe interlock to the bee-line of weld seam distal edge line, according to described bee-line acquisition ultrasonic probe to the first bee-line of weld seam distal edge line; Wherein, described weld seam is weld seam near side (ns) line near a sideline of ultrasonic probe, and described weld seam is weld seam distal edge line away from a sideline of ultrasonic probe;
Described echo detecting circuit, also for obtaining ultrasonic probe deflection angle according to described bee-line and reference substance spacing, obtain second bee-line of reference point to ultrasonic probe according to the reflection spot in described ultrasonic probe deflection angle and weld seam to the front end distance of ultrasonic probe; Wherein, reflection spot in described weld seam is reference point at the vertical projection point of detection faces, described reference point is the 3rd bee-line to the bee-line of the first bee-line, the intersection point of described 3rd bee-line and described first bee-line is described reference point, and described detection faces is the workpiece test surface of ultrasonic probe incidence;
Described echo detecting circuit, also for the degree of depth according to described first bee-line, the second bee-line and reflection spot, obtains the position of the relative section of weld joint of reflection spot.
Wherein, described reference substance is sensor, described sensor is electromagnetic sensor or mechanical wave sensors, described sensor is connected with echo detecting circuit, described echo detecting circuit, also for obtaining the echoed signal of the sensor with ultrasonic probe interlock, obtain the bee-line of described sensor to weld seam distal edge line according to described echoed signal.
Wherein, the reference substance that described acquisition links with ultrasonic probe, to the bee-line of weld seam distal edge line, comprising:
If workpiece is plate, then obtain reference substance with ultrasonic probe interlock to the bee-line of reference surface, described reference surface is perpendicular to detection faces and through the surface of weld seam distal edge line;
If workpiece is vertically T-shaped, then obtain reference substance with ultrasonic probe interlock to the bee-line of reference surface, described reference surface is perpendicular to detection faces and the surface of the work of close ultrasonic probe;
If workpiece is tiltedly T-shaped, then obtain reference substance with ultrasonic probe interlock to the bee-line of reference surface, described reference surface is favour detection faces and the surface of the work of close ultrasonic probe;
The reference substance that described acquisition links with ultrasonic probe, to the bee-line of weld seam distal edge line, obtains ultrasonic probe to the first bee-line of weld seam distal edge line according to described bee-line, comprising:
Obtain the echoed signal of two sensors with ultrasonic probe interlock, described ultrasonic probe is in the point midway of line between two sensors, obtains two sensors respectively to the bee-line of weld seam distal edge line, be designated as L according to described echoed signal
1and L
2;
Remember that described ultrasonic probe is L' to the first bee-line of weld seam distal edge line, according to L'=(L
1+ L
2)/2, obtain first bee-line of ultrasonic probe to weld seam distal edge line;
Describedly obtain ultrasonic probe deflection angle according to described bee-line and reference substance spacing, obtain reference point to the second bee-line of ultrasonic probe according to the reflection spot in described ultrasonic probe deflection angle and weld seam to the front end distance of ultrasonic probe, comprising:
Remember that two sensors divide the bee-line being clipped to weld seam distal edge line to be L
1and L
2, the spacing of two sensors is S, and when sensor links with ultrasonic probe, the deflection angle of two sensor lines is α, ultrasonic probe rotate time ultrasonic probe deflection angle be β, according to β=α=arcsin (| L
1-L
2|/S), obtain ultrasonic probe deflection angle;
Reflection spot in note weld seam is LA to the front end distance of ultrasonic probe, and reference point is La to the second bee-line of ultrasonic probe, according to La=LA × cos β, obtains the second bee-line;
Described ultra-sonic defect detector also comprises the display screen be connected with echo detecting circuit, described display screen is used in the degree of depth of described echo detecting circuit according to described first bee-line, the second bee-line and reflection spot, after obtaining the position of the relative section of weld joint of reflection spot, show section of weld joint image on a display screen, in described section of weld joint image, show the position of reflection spot;
Describedly show section of weld joint image on a display screen, in described section of weld joint image, show the position of reflection spot, comprising:
The degree of depth of note reflection spot is DA, and the thickness of workpiece of detection faces is T, and the display depth showing reflection spot in section of weld joint image is d; If DA≤T, then d=DA; If T<DA≤2T, then d=2T-DA; If 2T<DA≤3T, then d=DA-2T; If 3T<DA≤4T, then d=4T-DA.
Beneficial effect of the present invention is: a kind of ultrasonic flaw detection localization method and ultra-sonic defect detector, comprise echo detecting circuit, described echo detecting circuit connects ultrasonic probe, described ultrasonic probe is fixedly connected with support, described support is arranged the reference substance with ultrasonic probe interlock, described echo detecting circuit for obtaining reference substance with ultrasonic probe interlock to the bee-line of weld seam distal edge line, according to described bee-line acquisition ultrasonic probe to the first bee-line of weld seam distal edge line; Wherein, described weld seam is weld seam near side (ns) line near a sideline of ultrasonic probe, and described weld seam is weld seam distal edge line away from a sideline of ultrasonic probe; Described echo detecting circuit, also for obtaining ultrasonic probe deflection angle according to described bee-line and reference substance spacing, obtains second bee-line of reference point to ultrasonic probe according to the reflection spot in described ultrasonic probe deflection angle and weld seam to the front end distance of ultrasonic probe; Wherein, reflection spot in described weld seam is reference point at the vertical projection point of detection faces, described reference point is the 3rd bee-line to the bee-line of the first bee-line, the intersection point of described 3rd bee-line and described first bee-line is described reference point, and described detection faces is the workpiece test surface of ultrasonic probe incidence; Described echo detecting circuit, also for the degree of depth according to described first bee-line, the second bee-line and reflection spot, obtains the position of the relative section of weld joint of reflection spot.Visible, a kind of ultrasonic flaw detection localization method and ultra-sonic defect detector, directly can obtain the position of the relative section of weld joint of defect, reduce the workload of on-the-spot carrying out flaw detection, reduce the dependence to operating personnel's subjective judgement, reduce the False Rate to defective locations and character.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing the embodiment of the present invention is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the content of the embodiment of the present invention and these accompanying drawings.
Fig. 1 is the method flow diagram of ultrasonic flaw detection localization method provided by the invention first embodiment.
Fig. 2 is the method flow diagram of ultrasonic flaw detection localization method provided by the invention second embodiment.
Fig. 3 is that ultrasonic flaw detection localization method provided by the invention reflection spot when detected state is positioned at the schematic diagram of section of weld joint.
Fig. 4 is the method flow diagram of ultrasonic flaw detection localization method provided by the invention 3rd embodiment.
Fig. 5 is the schematic diagram that the ultrasonic flaw detection localization method provided by the invention reflection spot that display screen shows when detected state is positioned at section of weld joint.
Fig. 6 is the structural representation of contrast before and after the ultrasonic probe of ultra-sonic defect detector provided by the invention first embodiment rotates.
Fig. 7 is the structural representation of contrast before and after the ultrasonic probe of ultra-sonic defect detector provided by the invention second embodiment rotates.
Fig. 8 is the structural representation of contrast before and after the ultrasonic probe of ultra-sonic defect detector provided by the invention 3rd embodiment rotates.
Fig. 9 is the structural representation of contrast before and after the ultrasonic probe of ultra-sonic defect detector provided by the invention 4th embodiment rotates.
Description of reference numerals:
1-ultrasonic probe; 2-support; 3-reference substance.
Embodiment
The technical matters solved for making the present invention, the technical scheme of employing and the technique effect that reaches are clearly, be described in further detail below in conjunction with the technical scheme of accompanying drawing to the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those skilled in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to Fig. 1, it is the method flow diagram of ultrasonic flaw detection localization method provided by the invention first embodiment.The ultrasonic flaw detection localization method that the embodiment of the present invention provides, can be applicable to plate workpiece, vertical T-shaped workpiece, oblique T-shaped workpiece and the larger local of radius and can be considered plate and butt-weld is that pipe is indulged, the workpiece of circumferential weld and sphere.
This ultrasonic flaw detection localization method, comprising:
Step S101, obtain the reference substance 3 that links with ultrasonic probe 1 to the bee-line of weld seam distal edge line, obtain the first bee-line of ultrasonic probe 1 to weld seam distal edge line according to described bee-line; Wherein, described weld seam is weld seam near side (ns) line near a sideline of ultrasonic probe 1, and described weld seam is weld seam distal edge line away from a sideline of ultrasonic probe 1;
Wherein, described acquisition arrives the bee-line of weld seam distal edge line with the reference substance 3 that ultrasonic probe 1 links, and comprising:
If workpiece is plate, then obtain the bee-line that the reference substance 3 linked with ultrasonic probe 1 arrives reference surface, described reference surface is perpendicular to detection faces and through the surface of weld seam distal edge line;
If workpiece is vertically T-shaped, then obtain the bee-line that the reference substance 3 linked with ultrasonic probe 1 arrives reference surface, described reference surface is perpendicular to detection faces and the surface of the work of close ultrasonic probe 1;
If workpiece is tiltedly T-shaped, then obtain the bee-line that the reference substance 3 linked with ultrasonic probe 1 arrives reference surface, described reference surface is favour detection faces and the surface of the work of close ultrasonic probe 1.
Plate workpiece, need arrange a reference plate and be close to the placement of weld seam distal edge line, as reference surface and a signal reflex face of location; Vertical T-shaped workpiece, then do not need to arrange reference plate, surface of the work just can be used as reference surface and signal reflex face, oblique T-shaped workpiece, do not need to arrange reference plate yet, surface of the work just can be used as reference surface and signal reflex face, but the mathematic calculation of oblique T-shaped workpiece and plate workpiece, vertical T-shaped workpiece different, but realize still relatively simple.
Preferably, ultra-sonic defect detector removably connects a reference plate, when not having reference surface and signal reflex face in the external world, can select to install reference plate and uses to detect.
Step S102, obtain ultrasonic probe 1 deflection angle according to described bee-line and reference substance 3 spacing, obtain second bee-line of reference point to ultrasonic probe 1 according to the reflection spot in described ultrasonic probe 1 deflection angle and weld seam to the front end distance of ultrasonic probe 1; Wherein, reflection spot in described weld seam is reference point at the vertical projection point of detection faces, described reference point is the 3rd bee-line to the bee-line of the first bee-line, the intersection point of described 3rd bee-line and described first bee-line is described reference point, and described detection faces is the workpiece test surface of ultrasonic probe 1 incidence;
Step S103, the degree of depth according to described first bee-line, the second bee-line and reflection spot, obtain the position of the relative section of weld joint of reflection spot.
In general, detecting that reflection spot is in weld seam, is the situation that testing staff compares care.And detecting that reflection spot is in workpiece itself, testing staff then tends to ignore this defect, and reflection spot is defect.So, the position of the relative section of weld joint of the reflection spot in weld seam that we only need obtain.
The use of this ultrasonic flaw detection localization method can only be opened when needs are analyzed bee-line, therefore, a special button can be set on the ultra-sonic defect detector of correspondence for opening or closing this function, press this button when gate entangles echo and just can apply this ultrasonic flaw detection localization method, energy-conserving and environment-protective.
To sum up, a kind of ultrasonic flaw detection localization method, by contrast echo ripple probe 1 to the first bee-line of weld seam distal edge line and ultrasonic probe 1 to the second bee-line of reference point, coordinate the degree of depth of reflection spot again, directly can obtain the positional information of the relative section of weld joint of reflection spot, namely the position of the relative section of weld joint of defect, reduces the workload of on-the-spot carrying out flaw detection, reduce the dependence to operating personnel's subjective judgement, reduce the False Rate to defective locations and character.
Please refer to Fig. 2, it is the method flow diagram of ultrasonic flaw detection localization method provided by the invention second embodiment.The key distinction of the present embodiment and ultrasonic flaw detection localization method first embodiment is the concrete calculation procedure adding the first bee-line and the second bee-line.
This ultrasonic flaw detection localization method, comprising:
Step S201, obtain the echoed signal of two sensors linked with ultrasonic probe 1, described ultrasonic probe 1 is in the point midway of line between two sensors, obtain two sensors respectively to the bee-line of weld seam distal edge line according to described echoed signal, be designated as L
1and L
2;
Wherein, described weld seam is weld seam near side (ns) line near a sideline of ultrasonic probe 1, and described weld seam is weld seam distal edge line away from a sideline of ultrasonic probe 1;
Step S202, the first bee-line remembering described ultrasonic probe 1 to weld seam distal edge line are L', according to L'=(L
1+ L
2)/2, obtain the first bee-line of ultrasonic probe 1 to weld seam distal edge line;
Preferably, described reference substance 3 is two different sensors, is convenient to distinguish the echoed signal of two sensors fast, simplified measurement process.The point midway of ultrasonic probe 1 line between two sensors, is convenient to the simplification of trigonometric function conversion process.Sensor is electromagnetic sensor or mechanical wave sensors.Sensor requirements can launch the signal of large spread angle, and general transmitting spread angle is 0 ~ 120 °.If install a wide-angle rotatable turntable in sensor base, then sensor is to the no requirement (NR) of transmitting spread angle.
Preferably, described reference substance 3 is sensor, then described reference plate is the sheet metal of band absorption affinity.The reflected signal of oblique T-shaped workpiece relative to vertical T-shaped workpiece reflected signal more weak, when processing the reflected signal of oblique T-shaped workpiece, also needed to amplify or filter and amplification the reflected signal of oblique T-shaped workpiece before mathematical computations.
Sensor sends wave beam, wave beam returns after reference surface reflection, sensor receives the echoed signal returned, according to the time variations of echoed signal, echo detecting circuit can obtain the bee-line of sensor phase butt welded seam distal edge line automatically, convert through known trigonometric function again, the first bee-line of ultrasonic probe 1 phase butt welded seam distal edge line can be obtained fast.Sensor links with ultrasonic probe 1, deflects in testing process at ultrasonic probe 1, and the deflection angle of two sensor lines is the deflection angle of ultrasonic probe 1.
Please refer to Fig. 3, it is that ultrasonic flaw detection localization method provided by the invention reflection spot when detected state is positioned at the schematic diagram of section of weld joint.
Step S203, note two sensors divide the bee-line being clipped to weld seam distal edge line to be L
1and L
2, the spacing of two sensors is S, and when sensor links with ultrasonic probe 1, the deflection angle of two sensor lines is α, and ultrasonic probe 1 deflection angle when ultrasonic probe 1 rotates is β, according to β=α=arcsin (| L
1-L
2|/S), obtain ultrasonic probe 1 deflection angle;
Certainly, the deflection angle of described two sensor lines also intuitively can read and draws by arranging a protractor below sensor.
Reflection spot in step S204, note weld seam is LA to the front end distance of ultrasonic probe 1, and reference point is La to the second bee-line of ultrasonic probe 1, according to La=LA × cos β, obtains the second bee-line;
Wherein, reflection spot in described weld seam is reference point at the vertical projection point of detection faces, described reference point is the 3rd bee-line to the bee-line of the first bee-line, the intersection point of described 3rd bee-line and described first bee-line is described reference point, and described detection faces is the workpiece test surface of ultrasonic probe 1 incidence;
No matter whether ultrasonic probe 1 deflects, perpendicular in the cross-wise direction of weld line, the degree of depth DA of reflection spot is constant, reflection spot in weld seam changes to the front end distance LA of ultrasonic probe 1, then reference point also changes to the second bee-line of ultrasonic probe 1, we only need to know the DA on section of weld joint and the second bee-line, and namely corrected front end distance La can obtain the position of the relative section of weld joint of reflection spot, i.e. the position of the relative section of weld joint of defect.
Weld line is a length direction through weld seam, vertical and be in the straight line of section of weld joint geometric center.
Preferably, angle calculation operational precision to retain after radix point one, and unit be °, and length calculation operation precision to retain after radix point one, and unit mm, meets the national standard requirement of UT (Ultrasonic Testing) detection.
Step S205, the degree of depth according to described first bee-line, the second bee-line and reflection spot, obtain the position of the relative section of weld joint of reflection spot.
The ultrasonic flaw detection localization method that the embodiment of the present invention provides, uses for the workpiece that curvature is little and limits to some extent.
To sum up, the ultrasonic flaw detection localization method that the technical program provides is in conjunction with defectoscope, just can realize a subsidiary function of detecting a flaw, unlatching or closedown that a button is used for this UT (Ultrasonic Testing) function only need be increased on defectoscope, directly can obtain the position of defect opposite piece section of weld joint, reduce the workload of Site Detection, reduce the dependence to operating personnel's subjective judgement, reduce the False Rate to defective locations and character.
Please refer to Fig. 4, it is the method flow diagram of ultrasonic flaw detection localization method provided by the invention 3rd embodiment.The key distinction of the present embodiment and ultrasonic flaw detection localization method second embodiment is to add the concrete steps of the position showing the relative section of weld joint of reflection spot.
This ultrasonic flaw detection localization method, comprising:
Step S301, obtain the echoed signal of sensor linked with ultrasonic probe 1, obtain the bee-line of described sensor to weld seam distal edge line according to described echoed signal, obtain the first bee-line of ultrasonic probe 1 to weld seam distal edge line according to described bee-line; Wherein, described weld seam is weld seam near side (ns) line near a sideline of ultrasonic probe 1, and described weld seam is weld seam distal edge line away from a sideline of ultrasonic probe 1;
Preferably, described sensor is ultrasonic sensor, and ultrasonic sensor adopts little wafer to launch, and diffusion angle is 100 °.Echo detecting circuit calculates two ultrasonic sensors respectively to the first bee-line of weld seam distal edge line by two ultrasonic echo signal that ultrasonic sensor is reflected back.
Step S302, obtain ultrasonic probe 1 deflection angle according to described bee-line and reference substance 3 spacing, obtain second bee-line of reference point to ultrasonic probe 1 according to the reflection spot in described ultrasonic probe 1 deflection angle and weld seam to the front end distance of ultrasonic probe 1; Wherein, reflection spot in described weld seam is reference point at the vertical projection point of detection faces, described reference point is the 3rd bee-line to the bee-line of the first bee-line, the intersection point of described 3rd bee-line and described first bee-line is described reference point, and described detection faces is the workpiece test surface of ultrasonic probe 1 incidence;
Step S303, the degree of depth according to described first bee-line, the second bee-line and reflection spot, obtain the position of the relative section of weld joint of reflection spot;
Step S304, show section of weld joint image on a display screen, in described section of weld joint image, show the position of reflection spot;
Please refer to Fig. 5, it is the schematic diagram that the ultrasonic flaw detection localization method provided by the invention reflection spot that display screen shows when detected state is positioned at section of weld joint.
Echo detecting circuit can support design and the picture of multiple welding joint form, and calculates and the relative position of display defect on section of weld joint according to detected range information.
The section of weld joint of display is not by the impact of scanning mode, and when ultrasonic probe 1 does zigzag scan Z, tiltedly scanning, the section of weld joint of display is the tangent plane perpendicular to bead direction; The parameter of multiple section of weld joint and graphic designs, with reference to the welding seam design part of the acoustic beam Simulation Software Design of phased array, can be selected the parameter of plate workpiece with vertical T-shaped workpiece.
Wherein, describedly show section of weld joint image on a display screen, in described section of weld joint image, show the position of reflection spot, comprising:
The degree of depth of note reflection spot is DA, and the thickness of workpiece of detection faces is T, and the display depth showing reflection spot in section of weld joint image is d; If DA≤T, then d=DA; If T<DA≤2T, then d=2T-DA; If 2T<DA≤3T, then d=DA-2T; If 3T<DA≤4T, then d=4T-DA.
To sum up, the ultrasonic flaw detection localization method that the technical program provides, can carry out the display directly perceived of the position of defect opposite piece section of weld joint, reduces the workload of Site Detection.Defectoscope display is the display of a kind of waveform.On screen, horizontal ordinate represents the time, ordinate representative reflection wave intensity.Shown intuitively by defective locations, and the illustrated importing of weld seam, the False Rate of checker to defect can be reduced to greatest extent.
The ultrasonic flaw detection localization method that the technical program provides can obtain bee-line and ultrasonic probe 1 deflection angle of ultrasonic probe 1 phase butt welded seam fast, reach object flaw indication relative position being real-time transmitted to defectoscope realize target signal and locating in real time, thus reduce in on-the-spot flaw detection process the frequent repetitive operation of pedestrian's work calculating signal location of will manually going forward side by side with chi measurement to each relevant display, tenfold ground improves testing efficiency, and show in real time, tracking signal extends track and direction, this is manual measurement location, qualitatively cannot to realize, will overturn current manual measurement method in this approach, major step has been strided forward for realizing detecting automatic discrimination.In addition; the display data of display screen can be checked intuitively during manual measurement; decrease the number of times with the finger manipulation ultra-sonic defect detector being stained with couplant; too much couplant is avoided to be stained with on ultra-sonic defect detector; thus certain protective effect is played to the ultra-sonic defect detector of precision, extend the serviceable life of ultra-sonic defect detector.
It is below the embodiment of ultra-sonic defect detector provided by the invention.The embodiment of ultra-sonic defect detector and the embodiment of above-mentioned ultrasonic flaw detection localization method belong to same design, the detail content of not detailed description in the embodiment of ultra-sonic defect detector, can with reference to the embodiment of above-mentioned ultrasonic flaw detection localization method.
Please refer to Fig. 6, it is the structural representation contrasted before and after ultrasonic probe 1 rotation of ultra-sonic defect detector provided by the invention first embodiment.The ultra-sonic defect detector that the embodiment of the present invention provides is applied to plate workpiece.
This ultra-sonic defect detector, comprises echo detecting circuit, and described echo detecting circuit connects ultrasonic probe 1, and described ultrasonic probe 1 is fixedly connected with support 2, described support 2 is arranged the reference substance 3 linked with ultrasonic probe 1,
Described echo detecting circuit, arriving the bee-line of weld seam distal edge line, obtaining the first bee-line of ultrasonic probe 1 to weld seam distal edge line according to described bee-line for obtaining the reference substance 3 linked with ultrasonic probe 1; Wherein, described weld seam is weld seam near side (ns) line near a sideline of ultrasonic probe 1, and described weld seam is weld seam distal edge line away from a sideline of ultrasonic probe 1;
Described echo detecting circuit, also for obtaining ultrasonic probe 1 deflection angle according to described bee-line and reference substance 3 spacing, obtain second bee-line of reference point to ultrasonic probe 1 according to the reflection spot in described ultrasonic probe 1 deflection angle and weld seam to the front end distance of ultrasonic probe 1; Wherein, reflection spot in described weld seam is reference point at the vertical projection point of detection faces, described reference point is the 3rd bee-line to the bee-line of the first bee-line, the intersection point of described 3rd bee-line and described first bee-line is described reference point, and described detection faces is the workpiece test surface of ultrasonic probe 1 incidence;
Described echo detecting circuit, also for the degree of depth according to described first bee-line, the second bee-line and reflection spot, obtains the position of the relative section of weld joint of reflection spot.
The ultra-sonic defect detector that the technical program provides, except echo detecting circuit, for launch detection signal ultrasonic probe 1 except, also need the support 2 that configuration one is special, support 2 is fixedly connected with reference substance 3 for being fixed on ultrasonic probe 1, described support 2 is preferably cross bar, structure is simple, convenience of calculation.
The ultra-sonic defect detector that the embodiment of the present invention provides, uses for the workpiece that curvature is little and limits to some extent.
To sum up, the ultra-sonic defect detector that the technical program provides, by contrast echo ripple probe 1 to the first bee-line of weld seam distal edge line and ultrasonic probe 1 to the second bee-line of reference point, coordinate the degree of depth of reflection spot again, directly can obtain the positional information of the relative section of weld joint of reflection spot, namely the position of the relative section of weld joint of defect, reduces the workload of on-the-spot carrying out flaw detection, reduce the dependence to operating personnel's subjective judgement, reduce the False Rate to defective locations and character.
Please refer to Fig. 7, it is the structural representation contrasted before and after ultrasonic probe 1 rotation of ultra-sonic defect detector provided by the invention second embodiment.The ultra-sonic defect detector that the embodiment of the present invention provides is applied to vertical T-shaped workpiece.
This ultra-sonic defect detector, comprises echo detecting circuit, and described echo detecting circuit connects ultrasonic probe 1, and described ultrasonic probe 1 is fixedly connected with support 2, described support 2 is arranged the reference substance 3 linked with ultrasonic probe 1,
Described echo detecting circuit, arriving the bee-line of weld seam distal edge line, obtaining the first bee-line of ultrasonic probe 1 to weld seam distal edge line according to described bee-line for obtaining the reference substance 3 linked with ultrasonic probe 1; Wherein, described weld seam is weld seam near side (ns) line near a sideline of ultrasonic probe 1, and described weld seam is weld seam distal edge line away from a sideline of ultrasonic probe 1;
Described echo detecting circuit, also for obtaining ultrasonic probe 1 deflection angle according to described bee-line and reference substance 3 spacing, obtain second bee-line of reference point to ultrasonic probe 1 according to the reflection spot in described ultrasonic probe 1 deflection angle and weld seam to the front end distance of ultrasonic probe 1; Wherein, reflection spot in described weld seam is reference point at the vertical projection point of detection faces, described reference point is the 3rd bee-line to the bee-line of the first bee-line, the intersection point of described 3rd bee-line and described first bee-line is described reference point, and described detection faces is the workpiece test surface of ultrasonic probe 1 incidence;
Described echo detecting circuit, also for the degree of depth according to described first bee-line, the second bee-line and reflection spot, obtains the position of the relative section of weld joint of reflection spot.
Wherein, described reference substance 3 is sensor, described sensor is electromagnetic sensor or mechanical wave sensors, described sensor is connected with echo detecting circuit, described echo detecting circuit, also for obtaining the echoed signal of the sensor linked with ultrasonic probe 1, obtain the bee-line of described sensor to weld seam distal edge line according to described echoed signal.
Wherein, described acquisition arrives the bee-line of weld seam distal edge line with the reference substance 3 that ultrasonic probe 1 links, and comprising:
If workpiece is plate, then obtain the bee-line that the reference substance 3 linked with ultrasonic probe 1 arrives reference surface, described reference surface is perpendicular to detection faces and through the surface of weld seam distal edge line;
If workpiece is vertically T-shaped, then obtain the bee-line that the reference substance 3 linked with ultrasonic probe 1 arrives reference surface, described reference surface is perpendicular to detection faces and the surface of the work of close ultrasonic probe 1;
If workpiece is tiltedly T-shaped, then obtain the bee-line that the reference substance 3 linked with ultrasonic probe 1 arrives reference surface, described reference surface is favour detection faces and the surface of the work of close ultrasonic probe 1;
Described acquisition arrives the bee-line of weld seam distal edge line with the reference substance 3 that ultrasonic probe 1 links, and obtains the first bee-line of ultrasonic probe 1 to weld seam distal edge line, comprising according to described bee-line:
Obtain the echoed signal of two sensors linked with ultrasonic probe 1, described ultrasonic probe 1 is in the point midway of line between two sensors, obtains two sensors respectively to the bee-line of weld seam distal edge line, be designated as L according to described echoed signal
1and L
2;
The first bee-line remembering described ultrasonic probe 1 to weld seam distal edge line is L', according to L'=(L
1+ L
2)/2, obtain the first bee-line of ultrasonic probe 1 to weld seam distal edge line;
Described according to described bee-line and reference substance 3 spacing acquisition ultrasonic probe 1 deflection angle, according to the reflection spot in described ultrasonic probe 1 deflection angle and weld seam to ultrasonic probe 1 front end distance obtain reference point to the second bee-line of ultrasonic probe 1, comprising:
Remember that two sensors divide the bee-line being clipped to weld seam distal edge line to be L
1and L
2, the spacing of two sensors is S, and when sensor links with ultrasonic probe 1, the deflection angle of two sensor lines is α, and ultrasonic probe 1 deflection angle when ultrasonic probe 1 rotates is β, according to β=α=arcsin (| L
1-L
2|/S), obtain ultrasonic probe 1 deflection angle;
Reflection spot in note weld seam is LA to the front end distance of ultrasonic probe 1, and reference point is La to the second bee-line of ultrasonic probe 1, according to La=LA × cos β, obtains the second bee-line;
Described ultra-sonic defect detector also comprises the display screen be connected with echo detecting circuit, described display screen is used in the degree of depth of described echo detecting circuit according to described first bee-line, the second bee-line and reflection spot, after obtaining the position of the relative section of weld joint of reflection spot, show section of weld joint image on a display screen, in described section of weld joint image, show the position of reflection spot;
Describedly show section of weld joint image on a display screen, in described section of weld joint image, show the position of reflection spot, comprising:
The degree of depth of note reflection spot is DA, and the thickness of workpiece of detection faces is T, and the display depth showing reflection spot in section of weld joint image is d; If DA≤T, then d=DA; If T<DA≤2T, then d=2T-DA; If 2T<DA≤3T, then d=DA-2T; If 3T<DA≤4T, then d=4T-DA.
To sum up, the ultra-sonic defect detector that the technical program provides, subsidiary function one by one is functionally integrated with at existing defectoscope, increase unlatching or closedown that a button is used for this UT (Ultrasonic Testing) subsidiary function, directly can obtain the position of defect opposite piece section of weld joint, reduce the workload of Site Detection, reduce the dependence to operating personnel's subjective judgement, reduce the False Rate to defective locations and character.
Reference surface is withstood when rotating to prevent support 2, can support 2 be arranged at after ultrasonic probe 1, except will deducting the length m of ultrasonic probe 1 itself when calculating, it is the same above that other computation processes and implementation procedure and support 2 are arranged at ultrasonic probe 1.
Please refer to Fig. 8, it is the structural representation contrasted before and after ultrasonic probe 1 rotation of ultra-sonic defect detector provided by the invention 3rd embodiment.The ultra-sonic defect detector that the embodiment of the present invention provides, is applied to the carrying out flaw detection of plate workpiece, and ultrasonic probe 1 is positioned at support 2 front.Please refer to Fig. 9, it is the structural representation contrasted before and after ultrasonic probe 1 rotation of ultra-sonic defect detector provided by the invention 4th embodiment.The ultra-sonic defect detector that the embodiment of the present invention provides, is applied to the carrying out flaw detection of vertical T-shaped workpiece, and ultrasonic probe 1 is positioned at support 2 front.
A kind of ultrasonic flaw detection localization method and ultra-sonic defect detector, directly can obtain the position of the relative section of weld joint of defect, reduce the workload of on-the-spot carrying out flaw detection, reduce the dependence to operating personnel's subjective judgement, reduce the False Rate to defective locations and character.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, this program can be stored in a computer-readable recording medium, and storage medium can comprise storer, disk or CD etc.
Above content is only preferred embodiment of the present invention, and for those of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, this description should not be construed as limitation of the present invention.
Claims (10)
1. a ultrasonic flaw detection localization method, is characterized in that, comprising:
Obtain reference substance with ultrasonic probe interlock to the bee-line of weld seam distal edge line, according to described bee-line acquisition ultrasonic probe to the first bee-line of weld seam distal edge line; Wherein, described weld seam is weld seam near side (ns) line near a sideline of ultrasonic probe, and described weld seam is weld seam distal edge line away from a sideline of ultrasonic probe;
Obtain ultrasonic probe deflection angle according to described bee-line and reference substance spacing, obtain second bee-line of reference point to ultrasonic probe according to the reflection spot in described ultrasonic probe deflection angle and weld seam to the front end distance of ultrasonic probe; Wherein, reflection spot in described weld seam is reference point at the vertical projection point of detection faces, described reference point is the 3rd bee-line to the bee-line of the first bee-line, the intersection point of described 3rd bee-line and described first bee-line is described reference point, and described detection faces is the workpiece test surface of ultrasonic probe incidence;
According to the degree of depth of described first bee-line, the second bee-line and reflection spot, obtain the position of the relative section of weld joint of reflection spot.
2. ultrasonic flaw detection localization method according to claim 1, is characterized in that, the reference substance that described acquisition links with ultrasonic probe, to the bee-line of weld seam distal edge line, comprising:
Obtain the echoed signal of the sensor with ultrasonic probe interlock, obtain the bee-line of described sensor to weld seam distal edge line according to described echoed signal.
3. ultrasonic flaw detection localization method according to claim 1, is characterized in that, the reference substance that described acquisition links with ultrasonic probe, to the bee-line of weld seam distal edge line, comprising:
If workpiece is plate, then obtain reference substance with ultrasonic probe interlock to the bee-line of reference surface, described reference surface is perpendicular to detection faces and through the surface of weld seam distal edge line;
If workpiece is vertically T-shaped, then obtain reference substance with ultrasonic probe interlock to the bee-line of reference surface, described reference surface is perpendicular to detection faces and the surface of the work of close ultrasonic probe;
If workpiece is tiltedly T-shaped, then obtain reference substance with ultrasonic probe interlock to the bee-line of reference surface, described reference surface is favour detection faces and the surface of the work of close ultrasonic probe.
4. ultrasonic flaw detection localization method according to claim 1, it is characterized in that, the reference substance that described acquisition links with ultrasonic probe, to the bee-line of weld seam distal edge line, obtains ultrasonic probe to the first bee-line of weld seam distal edge line according to described bee-line, comprising:
Obtain the echoed signal of two sensors with ultrasonic probe interlock, described ultrasonic probe is in the point midway of line between two sensors, obtains two sensors respectively to the bee-line of weld seam distal edge line, be designated as L according to described echoed signal
1and L
2;
Remember that described ultrasonic probe is L' to the first bee-line of weld seam distal edge line, according to L'=(L
1+ L
2)/2, obtain first bee-line of ultrasonic probe to weld seam distal edge line.
5. ultrasonic flaw detection localization method according to claim 4, it is characterized in that, described according to described bee-line and reference substance spacing acquisition ultrasonic probe deflection angle, according to the reflection spot in described ultrasonic probe deflection angle and weld seam to ultrasonic probe front end distance obtain reference point to the second bee-line of ultrasonic probe, comprising:
Remember that two sensors divide the bee-line being clipped to weld seam distal edge line to be L
1and L
2, the spacing of two sensors is S, and when sensor links with ultrasonic probe, the deflection angle of two sensor lines is α, ultrasonic probe rotate time ultrasonic probe deflection angle be β, according to β=α=arcsin (| L
1-L
2|/S), obtain ultrasonic probe deflection angle;
Reflection spot in note weld seam is LA to the front end distance of ultrasonic probe, and reference point is La to the second bee-line of ultrasonic probe, according to La=LA × cos β, obtains the second bee-line.
6. ultrasonic flaw detection localization method according to claim 1, is characterized in that, the described degree of depth according to described first bee-line, the second bee-line and reflection spot, after obtaining the position of the relative section of weld joint of reflection spot, also comprises:
Show section of weld joint image on a display screen, in described section of weld joint image, show the position of reflection spot.
7. ultrasonic flaw detection localization method according to claim 6, is characterized in that, describedly shows section of weld joint image on a display screen, shows the position of reflection spot, comprising in described section of weld joint image:
The degree of depth of note reflection spot is DA, and the thickness of workpiece of detection faces is T, and the display depth showing reflection spot in section of weld joint image is d; If DA≤T, then d=DA; If T<DA≤2T, then d=2T-DA; If 2T<DA≤3T, then d=DA-2T; If 3T<DA≤4T, then d=4T-DA.
8. a ultra-sonic defect detector, comprises echo detecting circuit, and described echo detecting circuit connects ultrasonic probe, and it is characterized in that, described ultrasonic probe is fixedly connected with support, described support is arranged the reference substance with ultrasonic probe interlock,
Described echo detecting circuit, for obtaining reference substance with ultrasonic probe interlock to the bee-line of weld seam distal edge line, according to described bee-line acquisition ultrasonic probe to the first bee-line of weld seam distal edge line; Wherein, described weld seam is weld seam near side (ns) line near a sideline of ultrasonic probe, and described weld seam is weld seam distal edge line away from a sideline of ultrasonic probe;
Described echo detecting circuit, also for obtaining ultrasonic probe deflection angle according to described bee-line and reference substance spacing, obtain second bee-line of reference point to ultrasonic probe according to the reflection spot in described ultrasonic probe deflection angle and weld seam to the front end distance of ultrasonic probe; Wherein, reflection spot in described weld seam is reference point at the vertical projection point of detection faces, described reference point is the 3rd bee-line to the bee-line of the first bee-line, the intersection point of described 3rd bee-line and described first bee-line is described reference point, and described detection faces is the workpiece test surface of ultrasonic probe incidence;
Described echo detecting circuit, also for the degree of depth according to described first bee-line, the second bee-line and reflection spot, obtains the position of the relative section of weld joint of reflection spot.
9. ultra-sonic defect detector according to claim 8, is characterized in that:
Described reference substance is sensor, described sensor is electromagnetic sensor or mechanical wave sensors, described sensor is connected with echo detecting circuit, described echo detecting circuit, also for obtaining the echoed signal of the sensor with ultrasonic probe interlock, obtain the bee-line of described sensor to weld seam distal edge line according to described echoed signal.
10. ultra-sonic defect detector according to claim 9, is characterized in that:
The reference substance that described acquisition links with ultrasonic probe, to the bee-line of weld seam distal edge line, comprising:
If workpiece is plate, then obtain reference substance with ultrasonic probe interlock to the bee-line of reference surface, described reference surface is perpendicular to detection faces and through the surface of weld seam distal edge line;
If workpiece is vertically T-shaped, then obtain reference substance with ultrasonic probe interlock to the bee-line of reference surface, described reference surface is perpendicular to detection faces and the surface of the work of close ultrasonic probe;
If workpiece is tiltedly T-shaped, then obtain reference substance with ultrasonic probe interlock to the bee-line of reference surface, described reference surface is favour detection faces and the surface of the work of close ultrasonic probe;
The reference substance that described acquisition links with ultrasonic probe, to the bee-line of weld seam distal edge line, obtains ultrasonic probe to the first bee-line of weld seam distal edge line according to described bee-line, comprising:
Obtain the echoed signal of two sensors with ultrasonic probe interlock, described ultrasonic probe is in the point midway of line between two sensors, obtains two sensors respectively to the bee-line of weld seam distal edge line, be designated as L according to described echoed signal
1and L
2;
Remember that described ultrasonic probe is L' to the first bee-line of weld seam distal edge line, according to L'=(L
1+ L
2)/2, obtain first bee-line of ultrasonic probe to weld seam distal edge line;
Describedly obtain ultrasonic probe deflection angle according to described bee-line and reference substance spacing, obtain reference point to the second bee-line of ultrasonic probe according to the reflection spot in described ultrasonic probe deflection angle and weld seam to the front end distance of ultrasonic probe, comprising:
Remember that two sensors divide the bee-line being clipped to weld seam distal edge line to be L
1and L
2, the spacing of two sensors is S, and when sensor links with ultrasonic probe, the deflection angle of two sensor lines is α, ultrasonic probe rotate time ultrasonic probe deflection angle be β, according to β=α=arcsin (| L
1-L
2|/S), obtain ultrasonic probe deflection angle;
Reflection spot in note weld seam is LA to the front end distance of ultrasonic probe, and reference point is La to the second bee-line of ultrasonic probe, according to La=LA × cos β, obtains the second bee-line;
Described ultra-sonic defect detector also comprises the display screen be connected with echo detecting circuit, described display screen is used in the degree of depth of described echo detecting circuit according to described first bee-line, the second bee-line and reflection spot, after obtaining the position of the relative section of weld joint of reflection spot, show section of weld joint image on a display screen, in described section of weld joint image, show the position of reflection spot;
Describedly show section of weld joint image on a display screen, in described section of weld joint image, show the position of reflection spot, comprising:
The degree of depth of note reflection spot is DA, and the thickness of workpiece of detection faces is T, and the display depth showing reflection spot in section of weld joint image is d; If DA≤T, then d=DA; If T<DA≤2T, then d=2T-DA; If 2T<DA≤3T, then d=DA-2T; If 3T<DA≤4T, then d=4T-DA.
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| CN104237376B (en) * | 2014-08-29 | 2017-05-31 | 内蒙古北方重工业集团有限公司 | A kind of blank defects in ultrasonic testing positioning and quantitative method |
| CN104345091B (en) * | 2014-10-11 | 2017-04-05 | 深圳市神视检验有限公司 | A kind of method and apparatus of the intersection positioning of pipe fitting welding |
| CN105510345A (en) * | 2015-12-04 | 2016-04-20 | 中航复合材料有限责任公司 | Honeycomb core-skin connection quality optical imaging method |
| CN108332926A (en) * | 2018-01-05 | 2018-07-27 | 株洲时代电子技术有限公司 | A kind of bridge cruising inspection system |
| CN110672725A (en) * | 2019-10-15 | 2020-01-10 | 宝鸡石油输送管有限公司 | Depth positioning test block and positioning method for weld defects of spiral submerged arc welded steel pipe |
| CN110887896B (en) * | 2019-11-12 | 2022-10-14 | 上海应用技术大学 | Stainless steel argon arc welding circular welding pipe weld defect eddy current on-line tracking detection device |
| CN110907535B (en) * | 2019-12-05 | 2021-08-20 | 广西电网有限责任公司电力科学研究院 | Defect positioning guided wave detection method based on rotary scanning |
| CN111983037B (en) * | 2020-08-25 | 2021-12-10 | 武汉大学 | Method for coupling tube joint welding seam and phased array probe by using mechanical assistance |
| CN113192130B (en) * | 2021-05-31 | 2022-12-06 | 网易（杭州）网络有限公司 | Method and device for detecting spacing |
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| JPS58214852A (en) * | 1982-06-08 | 1983-12-14 | Mitsubishi Electric Corp | Ultrasonic flaw detecting apparatus |
| JPH01219556A (en) * | 1988-02-26 | 1989-09-01 | Sumitomo Metal Ind Ltd | Ultrasonic wave flow detecting method for weld zone |
| JPH05288724A (en) * | 1992-04-08 | 1993-11-02 | Asupekuto:Kk | Automatic ultrasonic flaw detection |
| JP5076984B2 (en) * | 2008-03-13 | 2012-11-21 | Ｊｆｅスチール株式会社 | Ultrasonic flaw detection method, ultrasonic flaw detection apparatus and manufacturing method for electric sewing tube |
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