CN106501377A - A kind of method that employing ultrasonic phase array detects R corner structure flaw sizes - Google Patents
A kind of method that employing ultrasonic phase array detects R corner structure flaw sizes Download PDFInfo
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- CN106501377A CN106501377A CN201610816681.8A CN201610816681A CN106501377A CN 106501377 A CN106501377 A CN 106501377A CN 201610816681 A CN201610816681 A CN 201610816681A CN 106501377 A CN106501377 A CN 106501377A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/28—Details, e.g. general constructional or apparatus details providing acoustic coupling, e.g. water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/30—Arrangements for calibrating or comparing, e.g. with standard objects
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The present invention relates to a kind of method that employing ultrasonic phase array detects R corner structure flaw sizes, solves the inaccurate problem of R corner structures ultrasonic phase array detection defects assessment.The inventive method carries out ultrasonic phased array imaging detection using to R corner structures, by image measurement flaw size and is modified, and finally provides accurate flaw size in conjunction with sound field width.Present invention has the advantage that：1st, the defectoscopy step of R corner structure curved surface linear array probe detection is given；2nd, R corner structure curved surface linear array probe detection defectoscopy accuracy is improve；3rd, the quality control for R corner structures provides powerful guarantee.
Description
Technical field
The present invention relates to a kind of method that employing ultrasonic phase array detects R corner structure flaw sizes, belongs to Non-Destructive Testing skill
Art field.
Background technology
Composite R corner structures are a kind of common structure forms in military aircraft structure, the hatch door of carrier-borne aircraft, wallboard etc.
There are R corner structures, some other labyrinth product to be likely to include little curvature structure in product.The structure is in curing molding
During, the reasons such as uneven or state of cure is not enough because resin flows are easier compared with plane position to be caused hole, layering, take off
The defect such as viscous, is also easy to because fiber filling deficiency or resin flowing are bad in fiber filling area and forms hole defect.Also,
When inside the R corner structures and nearby there is defect, after product stress, the spreading rate of defect is greater than defect in laminate
Spreading rate.Therefore, the quality control to composite R corner structures is particularly significant.The aviations such as American and Britain are made the country prosperous, and constantly development is first
The Dynamic Non-Destruction Measurement for entering carries out quality to R corner structures and checks on, and has formulated strict acceptance criteria to which.Although China is also recognized
Know the importance of integration joint quality detection, but attention degree and technical merit lag far behind Great Britain and America country, can not
Meet the fast-developing needs of China's composite product.Lift China R corner structure detection technique levels as early as possible, reverse detection skill
Art and the unmatched passive situation of Materials are extremely urgent.
As R corner structures carry curvature, and when being detected to which using curved surface linear array probe, sound wave is in R corner structures
Sound-filed simulation more complicated, during measurement due to the sound field width of R corner structures accurately measurement is affected larger, accordingly, it would be desirable to first
First the sound field width of R corner structures is measured.
Content of the invention
The present invention is exactly designed and adopts ultrasonic phase array there is provided one kind for above-mentioned the deficiencies in the prior art
The method of detection R corner structure flaw sizes, its objective is to provide a kind of side that can accurately measure flaw size in R corner structures
Method.
The present invention is achieved through the following technical solutions：
The method that this kind detects R corner structure flaw sizes using ultrasonic phase array, the R corner structures are two flat boards of connection
The single-curvature arc surface (2) of plane (1), the circular arc curvature radius of single-curvature arc surface (2) are more than 3mm, less than 25mm, single-curvature
The circular arc opening angle of arc surface (2) is more than 30 °, and less than 180 °, single-curvature arc surface (2) claim along the section in circular arc direction
For circular cross-section (3), the thickness of circular cross-section (3) is identical with the thickness of plate level (1), circular cross-section (3) and above-mentioned two
Individual plate level (1) is vertical, the supersonic detection device include ultrasonic phased array inspection instrument (4), curved surface linear array probe (5),
With reference block (7), ultrasonic phased array inspection instrument (4) is by cable (8) and encoder for encoder (6) and acoustic field
(6), curved surface linear array probe (5) connection, the length on the bearing of trend of R angles of reference block (7) are more than 200mm, the length side
To vertical with circular cross-section (3), the material of reference block (7), R corner structures are identical with detected R corner structures with preparation technology,
It is characterized in that：The step of detection method, is as follows：
Step one, ultrasonic phase array detection is carried out to not existing defects R corner structures using reference block (7), obtain R angles knot
Sound field data in structure, that is, obtain R corner structures in each point on circular cross-section (3) along the beam width of circular arc and along R corner structures
Bearing of trend beam width；
The not existing defects R corner structures are identical in material, structure with R corner structures to be detected；
Step 2, ultrasonic phase array detection is carried out to R corner structures to be detected, curved surface linear array probe (5) passes through water coincidence
Position inside the R corner structures to find defect therein and determine defect, then the bearing of trend along R corner structures defect is entered
The imaging of row phased array C-scan and phased array B-scan are imaged, wherein, with 6dB methods measurement defect in R in the imaging of phased array C-scan
The extension imaging size of the bearing of trend of corner structure and the sign circular arc along circular arc on the circular cross-section (3) of R corner structures are imaged
Size；
Step 3, the buried depth for passing through phased array B-scan imaging measurement defect, and measure defective locations and the defect device
The angle α of the horizontal line (10) of R corner structures at the line (9) and the defect device in the center of circle at place R corner structure circular cross-sections (3)；
Step 4, the sign circular arc imaging size to defect on the circular cross-section (3) of R corner structures along circular arc are by following public affairs
Formula is modified：
In formula：X defect correction sizes, the radius of curvature of the single-curvature arc surface (2) of r R corner structures to be detected, h defects
Buried depth, R curved surface linear array probe (5) chips be distributed radius of curvature, l defects on the circular cross-section (3) of R corner structures along circular arc table
Levy circular arc imaging size；
Step 5, the measurement result according to step one, search the buried depth and angle α with defect in R corner structures to be detected
The beam width of the bearing of trend on circular cross-section (3) along the beam width of circular arc and along R angles of correspondence position；
If the measurement size of correction size of the step 6 defect along circular arc and the bearing of trend along R angles is all higher than step 5
In the extension side of the phased array probe sound field that finds out on circular cross-section (3) along the beam width of circular arc and along R corner structures
To beam width, then the full-size(d) for being defect of the above-mentioned correction size along circular arc and the bearing of trend along R angles.
In step 6, if defect actual size x is less than finding out in step 5 on circular cross-section (3) along circular arc
Beam width and one in the beam width of the bearing of trend of R corner structures, then defect actual size x can not represent defect
Full-size(d), the size of defect in R corner structures can be regained using Equivalent method or fixed value method.
Utilization reference block (7) described in step one carries out ultrasonic phase array detection to not existing defects R corner structures, obtains
The method of the sound field data in R corner structures be with reference to earlier application patent technical scheme realizing, the name of the patent application
Referred to as：Acoustic field measuring method of the R corner structures ultrasonic phase array detection with curved surface linear array probe, the Application No. of patent application：
201610424404.2, the applying date of patent application is：On June 15th, 2015.The step of measuring method, is as follows：
Step one, reference block (7) three adjacent circular cross-sections (3) upper, by reference block (7) appearance towards
The distance between the interior flat-bottom hole (8) for processing a diameter of 1mm, adjacent circular cross-section (3) are 25mm, each circular cross-section
(3) three flat-bottom holes (8) of upper processing, the position of three flat-bottom holes (8) be located at respectively the top of the upper circular arc of circular cross-section (3), in
The heart, bottom, the center line (9) of three flat-bottom holes (8) are vertical with the tangent line of circular arc at the position, three circular cross-sections
(3) nine flat-bottom holes (8) are machined with altogether, wherein：
The buried depth of three flat-bottom holes (8) for being located at the upper circular arc top of circular cross-section (3) is respectively：
A, 0.5mm or the 1/3 of circular cross-section (3) thickness, take numerical value in both little；
B, the 1/2 of circular cross-section (3) thickness；
C, 2/3 or circular cross-section (3) thickness of circular cross-section (3) thickness subtract 0.5mm, take numerical value in both big；
The buried depth of three flat-bottom holes (8) for being located at the upper center of arc of circular cross-section (3) is respectively：
A, 0.5mm or the 1/3 of circular cross-section (3) thickness, take numerical value in both little；
B, the 1/2 of circular cross-section (3) thickness；
C, 2/3 or circular cross-section (3) thickness of circular cross-section (3) thickness subtract 0.5mm, take numerical value in both big；
The buried depth of three flat-bottom holes (8) for being located at the upper circular arc bottom of circular cross-section (3) is respectively：
A, 0.5mm or the 1/3 of circular cross-section (3) thickness, take numerical value in both little；
B, the 1/2 of circular cross-section (3) thickness；
C, 2/3 or circular cross-section (3) thickness of circular cross-section (3) thickness subtract 0.5mm, take numerical value in both big；
Step 2, by reference block (7) place in the sink, curved surface linear array probe (5) by water coincidence in reference block
(7) working method of curved surface linear array probe (5), on, is set, and Scan pitch is 0.5mm, the horizontal level of sampled signal door is arranged
The gain of ultrasonic phased array inspection instrument (4) on flat-bottom hole (8) reflection echo, is adjusted, the reflection of each flat-bottom hole (8) is made respectively
Signal amplitude reaches the display screen full-scale 80% of ultrasonic phased array inspection instrument (4), and records the gain of each flat-bottom hole (8)
Value, then the bearing of trend along reference block (7) R angles carries out phased array to each flat-bottom hole (8) in reference block (7) respectively
C-scan imaging and B-scan are imaged, and in the imaging of phased array C-scan, measure each flat-bottom hole (8) in reference block with 6dB methods
(7) the extension imaging size of the bearing of trend of R corner structures and on the circular cross-section (3) of reference block (7) R corner structures along circular arc
Sign circular arc imaging size, phased array B-scan imaging in, measure the buried depth of each flat-bottom hole (8)；
Step 3, the sign circular arc imaging size of each flat-bottom hole (8) is modified as follows, obtains each flat
The circular arc imaging size of hole (8) circular arc along the circular cross-section (3) of reference block (7) R corner structures, correction formula are as follows：
In formula：X ' is circular arc imaging size, and r ' is the curvature half of the single-curvature arc surface (2) of reference block (7) R corner structures
Footpath, h ' are flat-bottom hole (8) buried depth, and R ' is that curved surface linear array probe (5) chip is distributed radius of curvature, and l ' is sign circular arc imaging chi
Very little；
If step 4 circular arc imaging size X and extension imaging size are all higher than corresponding flat-bottom hole (8) full-size(d),
Then circular arc imaging size X is in circular cross-section for curved surface linear array probe (5) corresponding flat-bottom hole (8) position in reference block (7)
(3) on along circular arc beam width, extend imaging size be curved surface linear array probe (5) accordingly flat in reference block (7)
At hole (8) position along R angles bearing of trend beam width；
If having one in circular arc imaging size X and extension imaging size less than or equal to corresponding flat-bottom hole (8) truly
Size, then repeat the above steps one to three, are wherein a difference in that on the position of the flat-bottom hole (8), process smaller diameter chi
Very little flat-bottom hole (8), diameter decreasing value are 0.2mm, until the circular arc imaging size X and extension imaging size of the flat-bottom hole (8)
It is all higher than corresponding flat-bottom hole (8) full-size(d).
The advantage and beneficial effect of technical solution of the present invention be：
1st, the defectoscopy step of R corner structure curved surface linear array probe detection is given；
2nd, R corner structure curved surface linear array probe detection defectoscopy accuracy is improve；
3rd, the quality control for R corner structures provides powerful guarantee.
Description of the drawings
Fig. 1 is the composition of acoustic field system in the present invention
Fig. 2 is the first structural representation of reference block 7 in embodiment
Fig. 3 is second structural representation of reference block 7 in embodiment
Fig. 4 is the third structural representation of reference block 7 in embodiment
Fig. 5 is the 4th kind of structural representation of reference block 7 in embodiment
Specific embodiment
Technical solution of the present invention is further described below with reference to drawings and Examples：
Referring to shown in accompanying drawing 1, the circular cross-section (3) of the R corner structures to be detected of the embodiment of the present invention and plate level (1)
Thickness be 6mm, the circular arc curvature radius of single-curvature arc surface (2) is 5mm, the circular arc opening angle of single-curvature arc surface (2)
For 90 °, the material of R corner structures to be detected is carbon fibre composite, and the supersonic detection device includes that ultrasonic phase array is examined
Survey instrument (4), curved surface linear array probe (5), encoder (6) and acoustic field reference block (7), ultrasonic phased array inspection instrument
(4) be connected with encoder (6), curved surface linear array probe (5) by cable (8), reference block (7) along the bearing of trend of R angles
Length be more than 200mm, the length direction is vertical with circular cross-section (3), the material of reference block (7), R corner structures and preparation work
Skill is identical with detected R corner structures, ultrasonic phased array inspection instrument (4) be M2M ultrasonic phased array inspection instruments, curved surface linear array
The step of probe (5) is 5MH, 32 chip curved surface linear array probes, the detection method is as follows：
Before step one, detection, ultrasonic phase array detection is carried out to not existing defects R corner structures using reference block (7), is obtained
Sound field data in R corner structures, that is, obtain R corner structures in each point on circular cross-section (3) along circular arc beam width with
Beam width along the bearing of trend of R corner structures；
The not existing defects R corner structures are identical in material, structure with R corner structures to be detected；
The detection process is as follows：
The version of reference block 7 is divided into following four：
The first structure of reference block 7 is as shown in Fig. 2 flat-bottom hole is distributed in three adjacent circular arcs of reference block 7
On section 3, the distance between adjacent circular cross-section 3 is 25mm, processes three flat-bottom holes 8, aperture on each circular cross-section 3
For 1mm, the position of three flat-bottom holes 8 is located at the top of circular arc, center, bottom on circular cross-section 3 respectively, three flat-bottom holes 8
Center line 9 is vertical with the tangent line of circular arc at the position, is machined with nine flat-bottom holes 8 on three circular cross-sections 3 altogether, three
The buried depth for being located at the flat-bottom hole 8 on circular arc top on circular cross-section 3 is respectively：0.5mm, 3mm, 5.5mm, three are located at circular cross-section
On 3, the buried depth of the flat-bottom hole 8 of center of arc is respectively：0.5mm, 3mm, 5.5mm, three are located at circular arc bottom on circular cross-section 3
The buried depth of flat-bottom hole 8 be respectively：0.5mm、3mm、5.5mm；
Second structure of reference block 7 is as shown in figure 3, flat-bottom hole is distributed in three adjacent circular arcs of reference block 7
On section 3, the distance between adjacent circular cross-section 3 is 25mm, five flat-bottom holes 8 of processing on each circular cross-section 3, five
The center line 9 of flat-bottom hole 8 is vertical with the tangent line of circular arc at the position, the center line of five flat-bottom holes 8 with pass through circular cross-section 3
The horizontal angle in the center of circle is respectively 0 °, 22.5 °, 45 °, 67.5 ° and 90 °, is machined with ten altogether on three circular cross-sections 3
Five flat-bottom holes 8, on first circular cross-section, the buried depth of five flat-bottom holes is 0.5mm, puts down for five on second circular cross-section
The buried depth of bottom outlet is 3mm, and on the 3rd circular cross-section, the buried depth of five flat-bottom holes is 5.5mm；
The third structure of reference block 7 is as shown in figure 4, flat-bottom hole is distributed in five adjacent circular arcs of reference block 7
On section 3, the distance between adjacent circular cross-section 3 is 25mm, 3 flat-bottom holes 8 of processing on each circular cross-section 3, three
The center line 9 of flat-bottom hole 8 is vertical with the tangent line of circular arc at the position, and the position of three flat-bottom holes 8 is located at circular cross-section 3 respectively
The top of upper circular arc, center, bottom, are machined with 15 flat-bottom holes 8 altogether on five circular cross-sections 3, first circular arc cuts
On face, the buried depth of three flat-bottom holes is 0.5mm, and on second circular cross-section, the buried depth of three flat-bottom holes is 1.5mm, and the 3rd
On individual circular cross-section, the buried depth of three flat-bottom holes is 3.0mm, and on the 4th circular cross-section, the buried depth of three flat-bottom holes is
4.5mm, on the 5th circular cross-section, the buried depth of three flat-bottom holes is 5.5mm；
4th kind of structure of reference block 7 is as shown in figure 5, flat-bottom hole is distributed in five adjacent circular arcs of reference block 7
On section 3, the distance between adjacent circular cross-section 3 is 25mm, five flat-bottom holes 8 of processing on each circular cross-section 3, five
The center line 9 of flat-bottom hole 8 is vertical with the tangent line of circular arc at the position, five flat centerline holes with justified by circular cross-section 3
The horizontal angle of the heart is respectively 0 °, 22.5 °, 45 °, 67.5 ° and 90 °, is machined with 20 altogether on five circular cross-sections 3
Five flat-bottom holes 8, on first circular cross-section, the buried depth of five flat-bottom holes is 0.5mm, puts down for five on second circular cross-section
The buried depth of bottom outlet is 1.5mm, and on the 3rd circular cross-section, the buried depth of five flat-bottom holes is 3.0mm, the 4th circular cross-section
The buried depth of upper five flat-bottom holes is 4.5mm, and on the 5th circular cross-section, the buried depth of five flat-bottom holes is 5.5mm.
Then the bearing of trend along reference block 7R angles carries out phased array C to each flat-bottom hole 8 in reference block 7 respectively
Scanning imagery and B-scan imaging, in the imaging of phased array C-scan, measure each flat-bottom hole 8 at reference block 7R angles with 6dB methods
The extension imaging size of the bearing of trend of structure and the sign circular arc on the circular cross-section 3 of reference block 7R corner structures along circular arc
Imaging size, in the imaging of phased array B-scan, measures the buried depth of each flat-bottom hole 8；
Each reference block 7 above-mentioned is placed in the sink, curved surface linear array probe 5 is by water coincidence in reference block 7
On, the array number that setting curved surface linear array probe 5 is once excited is 7, and array element firing order is excited successively for one chip in interval, sound
Beam working method is to focus in below R angle surface 2mm.Scan pitch is 0.5mm, and the horizontal level of sampled signal door is arranged on flat
The gain of ultrasonic phased array inspection instrument 4 on 8 reflection echo of bottom outlet, is adjusted, reaches the reflected signal amplitude of each flat-bottom hole 8 respectively
To the display screen full-scale 80% of ultrasonic phased array inspection instrument 4, and the yield value of each flat-bottom hole 8 is recorded, then along contrast
The bearing of trend at test block 7R angles respectively each flat-bottom hole 8 in reference block 7 is carried out the imaging of phased array C-scan and B-scan into
Picture, in the imaging of phased array C-scan, measures each flat-bottom hole 8 with 6dB methods and prolongs in the bearing of trend of reference block 7R corner structures
Imaging size and the sign circular arc imaging size on the circular cross-section 3 of reference block 7R corner structures along circular arc is stretched, in phased array B
In scanning imagery, the buried depth of each flat-bottom hole 8 is measured；The sign circular arc imaging size of each flat-bottom hole 8 is carried out as follows
Revise, obtain the circular arc imaging size of each flat-bottom hole 8 circular arc along the circular cross-section 3 of reference block 7R corner structures, revise public
Formula is as follows：
In formula：X ' is circular arc imaging size, and r ' is the radius of curvature of the single-curvature arc surface 2 of reference block 7R corner structures,
H ' is 8 buried depth of flat-bottom hole, and R ' is that 5 chip of curved surface linear array probe is distributed radius of curvature, and l ' is sign circular arc imaging size；
If the circular arc imaging size x ' that measurement is obtained and extension imaging size are all higher than 8 true chi of corresponding flat-bottom hole
Very little, then circular arc imaging size x ' is on circular cross-section 3 for corresponding 8 position of flat-bottom hole in reference block 7 of curved surface linear array probe 5
Along the beam width of circular arc, it is curved surface linear array probe 5 in reference block 7 at corresponding 8 position of flat-bottom hole to extend imaging size
Beam width along the bearing of trend at R angles；
If having one less than or equal to 8 true chi of corresponding flat-bottom hole in circular arc imaging size x ' and extension imaging size
Very little, then re-work reference block 7 and repeat above-mentioned test process, be wherein a difference in that on the position of the flat-bottom hole 8, plus
The flat-bottom hole 8 of work smaller diameter size, diameter decreasing value are 0.2mm, until circular arc imaging size X and the extension of the flat-bottom hole 8
Imaging size is all higher than 8 full-size(d) of corresponding flat-bottom hole.
Step 2, ultrasonic phase array detection is carried out to R corner structures to be detected, curved surface linear array probe (5) passes through water coincidence
Position inside the R corner structures to find defect therein and determine defect, then the bearing of trend along R corner structures defect is entered
The imaging of row phased array C-scan and phased array B-scan are imaged, and wherein, the imaging of phased array C-scan is that 6dB methods measurement defect is tied at R angles
The extension imaging size of the bearing of trend of structure and the sign circular arc imaging size on the circular cross-section (3) of R corner structures along circular arc；
Step 3, the buried depth for passing through phased array B-scan imaging measurement defect, and measure defective locations and the defect device
The angle α of the horizontal line (10) of R corner structures at the line (9) and the defect device in the center of circle at place R corner structure circular cross-sections (3)；
Step 4, the sign circular arc imaging size to defect on the circular cross-section (3) of R corner structures along circular arc are by following public affairs
Formula is modified：
In formula：X defect correction sizes, the radius of curvature of the single-curvature arc surface (2) of r R corner structures to be detected, h defects
Buried depth, R curved surface linear array probe (5) chips be distributed radius of curvature, l defects on the circular cross-section (3) of R corner structures along circular arc table
Levy circular arc imaging size；
Step 5, the measurement result according to step one, search the buried depth and angle α with defect in R corner structures to be detected
The beam width of the bearing of trend on circular cross-section (3) along the beam width of circular arc and along R angles of correspondence position；
If step 6 defect actual size x be all higher than finding out in step 5 on circular cross-section (3) along circular arc
Beam width and the beam width of the bearing of trend along R corner structures, then defect correction size x be defect full-size(d).
Claims (1)
1. a kind of method that employing ultrasonic phase array detects R corner structure flaw sizes, the R corner structures are put down for two flat boards of connection
The single-curvature arc surface (2) in face (1), the circular arc curvature radius of single-curvature arc surface (2) are more than 3mm, and less than 25mm, single-curvature is justified
The circular arc opening angle of cambered surface (2) is more than 30 °, and less than 180 °, single-curvature arc surface (2) are referred to as along the section in circular arc direction
Circular cross-section (3), the thickness of circular cross-section (3) are identical with the thickness of plate level (1), the circular cross-section (3) and above-mentioned two
Plate level (1) is vertical, and the supersonic detection device includes ultrasonic phased array inspection instrument (4), curved surface linear array probe (5), compiles
Code device (6) and acoustic field with reference block (7), ultrasonic phased array inspection instrument (4) by cable (8) and encoder (6),
Curved surface linear array probe (5) connects, and the length on the bearing of trend of R angles of reference block (7) is more than 200mm, the length direction with
Circular cross-section (3) is vertical, and the material of reference block (7), R corner structures are identical with detected R corner structures with preparation technology, and which is special
Levy and be：The step of detection method, is as follows：
Step one, ultrasonic phase array detection is carried out to not existing defects R corner structures using reference block (7), obtained in R corner structures
Sound field data, that is, obtain R corner structures in each point on circular cross-section (3) along the beam width of circular arc and prolonging along R corner structures
Stretch the beam width in direction；
The not existing defects R corner structures are identical in material, structure with R corner structures to be detected；
Step 2, ultrasonic phase array detection is carried out to R corner structures to be detected, curved surface linear array probe (5) is by water coincidence at R angles
Position of the inside configuration to find defect therein and determine defect, then the bearing of trend along R corner structures phase is carried out to defect
The imaging of control battle array C-scan and phased array B-scan are imaged, and wherein, are tied at R angles with 6dB methods measurement defect in the imaging of phased array C-scan
The extension imaging size of the bearing of trend of structure and the sign circular arc imaging size on the circular cross-section (3) of R corner structures along circular arc；
Step 3, the buried depth for passing through phased array B-scan imaging measurement defect, and measure R at defective locations and the defect device
The angle α of the horizontal line (10) of R corner structures at the line (9) and the defect device in the center of circle of corner structure circular cross-section (3)；
Step 4, defect is entered as follows along the sign circular arc imaging size of circular arc on the circular cross-section (3) of R corner structures
Row is revised：
In formula：X defect correction sizes, the radius of curvature of the single-curvature arc surface (2) of r R corner structures to be detected, h defect buried depths,
R curved surface linear array probe (5) chips are distributed radius of curvature, and l defects are justified along the sign of circular arc on the circular cross-section (3) of R corner structures
Arc imaging size；
Step 5, the measurement result according to step one, search corresponding with the buried depth and angle α of defect in R corner structures to be detected
The beam width of the bearing of trend on circular cross-section (3) along the beam width of circular arc and along R angles of position；
If the measurement size of correction size of the step 6 defect along circular arc and the bearing of trend along R angles is all higher than looking in step 5
The phased array probe sound field that finds out is on circular cross-section (3) along circular arcBeam width and the bearing of trend along R corner structures
Beam width, then the full-size(d) for being defect of the above-mentioned correction size along circular arc and the bearing of trend along R angles.
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