CN106124638B - The acoustic field measuring method of R corner structure ultrasonic phase arrays detection curved surface linear array probe - Google Patents
The acoustic field measuring method of R corner structure ultrasonic phase arrays detection curved surface linear array probe Download PDFInfo
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- CN106124638B CN106124638B CN201610424404.2A CN201610424404A CN106124638B CN 106124638 B CN106124638 B CN 106124638B CN 201610424404 A CN201610424404 A CN 201610424404A CN 106124638 B CN106124638 B CN 106124638B
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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
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- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The present invention is a kind of acoustic field measuring method of R corner structures ultrasonic phase array detection curved surface linear array probe, this method describe the compositions of acoustic field system, the measuring process of curved surface linear array probe sound field in the detection of R corner structures is given, while defining structure, sensitivity adjustment method and the judgement to Free field measurement result validity of acoustic field reference block.Present invention has the advantage that the acoustic field in the entire angles R radian region can be realized, the regularity of distribution of the sound field along different directions is more accurately grasped, important directive function is played to defect judge.
Description
Technical field
The present invention relates to a kind of R corner structures ultrasonic phase array detection acoustic field measuring methods of curved surface linear array probe, belong to
Technical field of nondestructive testing.
Background technology
Composite material R corner structures are a kind of common structure form in military aircraft structure, hatch door, siding of carrier-borne aircraft etc.
It may also includes small curvature structure to have R corner structures, some other labyrinth product in product.The structure is in curing molding
In the process, it is easier compared with plane position because the reasons such as the uneven or curing degree of resin flowing is insufficient cause hole, layering, take off
The defects of viscous, is also easy to form hole defect because fiber filling deficiency or resin flowing are bad in fiber filling area.Also,
When inside R corner structures and nearby there is defect, after product stress, the spreading rate of defect is greater than defect and is located in laminate
Spreading rate.Therefore, particularly significant to the quality control of composite material R corner structures.The aviations such as American and Britain are made the country prosperous, and are continued to develop first
Into non-destructive testing technology quality carried out to R corner structures check on, and formulated it stringent acceptance criteria.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, cannot
Meet the needs of China's composite product fast development.It is horizontal that China R corner structures detection technique is promoted as early as possible, torsion detection skill
Art and the unmatched passive situation of Materials are extremely urgent.
Due to R corner structures carry curvature, the bad judgement of the propagation law of acoustic beam wherein, and the phased array probe used for
Annular linear array, the probe detect when along the angles R length direction with along the sound field direction of the angles R curvature direction difference, therefore, to R
Before corner structure carries out ultrasonic phase array detection, it is necessary to the sound field generated in R corner structures to ultrasonic phase array probe measures,
To adjust measurement of the guidance to flaw size after phased array probe work rule and detection in time.
Invention content
The present invention is exactly to carry out the necessity of acoustic field before being detected for above-mentioned R corner structures ultrasonic phase array and design
A kind of acoustic field measuring method of R corner structures ultrasonic phase array detection curved surface linear array probe, the purpose is to the accurate palms before detection
The sound-filed simulation that ultrasonic phase array probe generates in R corner structures and the detectability to defect are held, to adjust phased array in time
Measurement of the guidance to flaw size after work rule of popping one's head in and detection.
The purpose of the present invention is achieved through the following technical solutions：
The measurement method of this kind of polymer matrix composites R corner structure ultrasound detection sound field, the R corner structures are connection two
The circular arc curvature radius of the single-curvature arc surface 2 of plate level 1, single-curvature arc surface 2 is more than 3mm, is less than 25mm, single-curvature circle
Circular arc opening angle of the cambered surface 2 along circular arc direction is more than 30 °, is less than 180 °, the section of the single-curvature arc surface 2 is known as circular arc
The thickness in section 3, circular cross-section 3 is identical as the thickness of plate level 1, which hangs down with above-mentioned two plate level 1
Directly, the supersonic detection device includes that ultrasonic phased array inspection instrument 4, curved surface linear array probe 5, encoder 6 and acoustic field are used
Reference block 7, ultrasonic phased array inspection instrument 4 are connect by cable with encoder 6, curved surface linear array probe 5, reference block 7
The length on the extending direction of the angles R be more than 200mm, the length direction is vertical with circular cross-section 3, material, the R of reference block 7
Corner structure and preparation process are identical as detected R corner structures, it is characterised in that：The step of measurement method, is as follows：
Step 1: on three adjacent circular cross-sections 3 of reference block 7, by the inward-facing processing of appearance of reference block 7
The flat-bottom hole 8 of a diameter of 1mm, the distance between adjacent circular cross-section 3 are 25mm, and three are processed on each circular cross-section 3
Flat-bottom hole 8, the position of three flat-bottom holes 8 are located at top, center, the bottom end of circular arc on circular cross-section 3, three flat-bottom holes 8
Center line 9 it is vertical with the tangent line of circular arc at the position, be machined with nine flat-bottom holes 8 altogether on three circular cross-sections 3,
In：
Three buried depths of flat-bottom hole 8 for being located at circular arc top on circular cross-section 3 are respectively：
A, the 1/3 of 3 thickness of 0.5mm or circular cross-section, takes numerical value in the two small；
B, the 1/2 of 3 thickness of circular cross-section；
C, 3 thickness of 2/3 or circular cross-section of 3 thickness of circular cross-section subtracts 0.5mm, takes numerical value in the two big；
Three buried depths of flat-bottom hole 8 for being located at center of arc on circular cross-section 3 are respectively：
A, the 1/3 of 3 thickness of 0.5mm or circular cross-section, takes numerical value in the two small；
B, the 1/2 of 3 thickness of circular cross-section；
C, 3 thickness of 2/3 or circular cross-section of 3 thickness of circular cross-section subtracts 0.5mm, takes numerical value in the two big；
Three buried depths of flat-bottom hole 8 for being located at circular arc bottom end on circular cross-section 3 are respectively：
A, the 1/3 of 3 thickness of 0.5mm or circular cross-section, takes numerical value in the two small；
B, the 1/2 of 3 thickness of circular cross-section；
C, 3 thickness of 2/3 or circular cross-section of 3 thickness of circular cross-section subtracts 0.5mm, takes numerical value in the two big；
Step 2: by reference block 7 place in the sink, curved surface linear array probe 5 by water coincidence in reference block 7,
The working method of curved surface linear array probe 5 is set, and scanning spacing is 0.5mm, and the horizontal position of sampled signal door is arranged in flat-bottom hole 8
On reflection echo, the gain of ultrasonic phased array inspection instrument 4 is adjusted, the reflected signal amplitude of each flat-bottom hole 8 is made to reach super respectively
The display screen full-scale 80% of sound phased array inspection instrument 4, and the yield value of each flat-bottom hole 8 is recorded, then along reference block
The extending direction at the angles 7R carries out the imaging of phased array C-scan to each flat-bottom hole 8 in reference block 7 respectively and B-scan is imaged,
In the imaging of phased array C-scan, each flat-bottom hole 8 is measured with 6dB methods and is extended into the extending direction of reference block 7R corner structures
The characterization circular arc imaging size of 3 upper edge circular arc of circular cross-section as size and in reference block 7R corner structures, in phased array B-scan
In imaging, the buried depth of each flat-bottom hole 8 is measured；
Step 3: the characterization circular arc imaging size of each flat-bottom hole 8 is modified as follows, each flat-bottom hole is obtained
8 along the circular cross-section 3 of reference block 7R corner structures circular arc circular arc imaging size, correction 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, and h is
8 buried depth of flat-bottom hole, R are that 5 chip of curved surface linear array probe is distributed radius of curvature, and l is characterization circular arc imaging size；
Step 4: if circular arc imaging size X and extension imaging size are all higher than 8 full-size(d) of corresponding flat-bottom hole,
Circular arc imaging size X be curved surface linear array probe 5 in reference block 7 at 8 position of corresponding flat-bottom hole in 3 upper edge circular arc of circular cross-section
Beam width, extend imaging size be curved surface linear array probe 5 in reference block 7 at 8 position of corresponding flat-bottom hole along the angles R
The beam width of extending direction；
If in circular arc imaging size X and extension imaging size, there are one be less than or equal to 8 true ruler of corresponding flat-bottom hole
It is very little, then repeat the above steps one to three, wherein be a difference in that on the position of the flat-bottom hole 8, processing smaller diameter size
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 are all higher than phase
8 full-size(d) of flat-bottom hole answered.
It is equiangularly spaced to add again between two adjacent flat-bottom holes 8 on the same circular cross-section 3 in step 1
The flat-bottom hole 8 vertical with the tangent line of circular arc at the position of work 1~2, the buried depth of the flat-bottom hole 8 of reprocessing and process before three
One buried depth in 8 buried depth of flat-bottom hole is equal.
In step 1, except three adjacent 3 both sides of circular cross-section of reference block 7, it is further added by 2~4 circular arcs
Section 3, the distance between each adjacent circular arc section 3 is equal, is 25mm, equiangularly spaced on each increased circular cross-section 3
Three~seven flat-bottom holes 8 are processed, the position of these flat-bottom holes 8 includes top, center, the bottom end for being located at circular arc on circular cross-section 3
Position, the center line 9 of increased flat-bottom hole 8 is vertical with the tangent line of circular arc at the position, flat on increased circular cross-section 3
The buried depth in hole 8 is equal or unequal, is one of following formula numerical value：
T/6、T/4、T/3、2T/3、3T/4、T5/6
In formula：T is 3 thickness of circular cross-section.
The present invention has the advantage that is with advantageous effect：
1, give sound-filed simulation measurement method in accurate R corner structures, it is indicated that by along reference block R angle extending directions and
Circular arc direction both direction along the angles R circular cross-section measures sound field respectively；
2, the acoustic field in the entire angles R radian region can be achieved；
3, by acoustic field, the regularity of distribution of the sound field along different directions can be grasped, for R corner structures probe selection and
Parameter adjustment provides foundation, and plays important directive function to defect judge.
Description of the drawings
Fig. 1 is the R corner structure reference block circular cross-sections and plate level position relationship side view that the present invention designs
Fig. 2 is the composition of acoustic field system in the present invention
Fig. 3 is the flat pore size distribution in reference block in acoustic field system of the present invention
Fig. 4 is the first structural schematic diagram of reference block 7 in embodiment
Fig. 5 is second of structural schematic diagram of reference block 7 in embodiment
Fig. 6 is the third structural schematic diagram of reference block 7 in embodiment
Fig. 7 is the 4th kind of structural schematic diagram of reference block 7 in embodiment
Specific implementation mode
Technical solution of the present invention is further described below with reference to drawings and examples：
Shown in attached drawing 1~3, the single-curvature circle of the R corner structures of measured carbon fibre composite in the present embodiment
The circular arc curvature radius of cambered surface 2 is 5mm, and the circular arc opening angle of single-curvature arc surface 2 is 90 °, 2 edge of single-curvature arc surface
The section in circular arc direction is known as circular cross-section 3, and the thickness of circular cross-section 3 is 6mm, the circular cross-section 3 with the thickness of plate level 1
Vertical with above-mentioned two plate level 1, the supersonic detection device includes ultrasonic phased array inspection instrument 4, curved surface linear array probe
5, encoder 6 and acoustic field reference block 7, ultrasonic phased array inspection instrument 4 pass through cable and encoder 6, camberline
The length on the extending direction of the angles R of 5 connection of battle array probe, reference block 7 is more than 200mm, which hangs down with circular cross-section 3
Directly, the material of reference block 7, R corner structures and preparation process are identical as detected R corner structures, ultrasonic phased array inspection instrument 4
For Multi2000 ultrasonic phase array detectors, curved surface linear array probe 5 is 5MH, 32 chip curved surface linear array probes, reference block 7
Structure type is divided into following four：
The first structure of reference block 7 is as shown in figure 4, 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, and three flat-bottom holes 8, aperture are processed on each circular cross-section 3
For 1mm, the position of three flat-bottom holes 8 is located at top, center, the bottom end of circular arc on circular cross-section 3, 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 of the flat-bottom hole 8 on circular arc top is respectively on circular cross-section 3：0.5mm, 3mm, 5.5mm, three are located at circular cross-section
The buried depth of the flat-bottom hole 8 of center of arc is respectively on 3：0.5mm, 3mm, 5.5mm, three are located at circular arc bottom end on circular cross-section 3
The buried depth of flat-bottom hole 8 be respectively：0.5mm、3mm、5.5mm；
Second of structure of reference block 7 is as shown in figure 5, 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 five flat-bottom holes 8 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 and passes through circular cross-section 3
The horizontal angle in the center of circle is respectively 0 °, 22.5 °, 45 °, 67.5 ° and 90 °, and ten are machined with altogether on three circular cross-sections 3
Five flat-bottom holes 8, the buried depth of five flat-bottom holes is 0.5mm on first circular cross-section, on second circular cross-section five it is flat
The buried depth of bottom outlet is 3mm, and the buried depth of five flat-bottom holes is 5.5mm on third circular cross-section；
The third structure of reference block 7 is as shown in fig. 6, 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, processes 3 flat-bottom holes 8 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
Top, center, the bottom end of upper circular arc, 15 flat-bottom holes 8 are machined on five circular cross-sections 3 altogether, and first circular arc is cut
The buried depth of three flat-bottom holes is 0.5mm on face, and the buried depth of three flat-bottom holes is 1.5mm, third on second circular cross-section
The buried depth of three flat-bottom holes is 3.0mm on a circular cross-section, and the buried depth of three flat-bottom holes is on the 4th circular cross-section
4.5mm, the buried depth of three flat-bottom holes is 5.5mm on the 5th circular cross-section；
4th kind of structure of reference block 7 is as shown in fig. 7, 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, processes five flat-bottom holes 8 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, and five flat centerline holes are justified with by circular cross-section 3
The horizontal angle of the heart is respectively 0 °, 22.5 °, 45 °, 67.5 ° and 90 °, and 20 are machined with altogether on five circular cross-sections 3
Five flat-bottom holes 8, the buried depth of five flat-bottom holes is 0.5mm on first circular cross-section, on second circular cross-section five it is flat
The buried depth of bottom outlet is 1.5mm, and the buried depth of five flat-bottom holes is 3.0mm on third circular cross-section, the 4th circular cross-section
The buried depth of upper five flat-bottom holes is 4.5mm, and the buried depth of five flat-bottom holes is 5.5mm on the 5th circular cross-section.
Then phased array C is carried out to each flat-bottom hole 8 in reference block 7 respectively along the extending direction at the angles reference block 7R
Scanning imagery and B-scan imaging measure each flat-bottom hole 8 at the angles reference block 7R in the imaging of phased array C-scan with 6dB methods
The characterization circular arc of the extension imaging size and the 3 upper edge circular arc of circular cross-section in reference block 7R corner structures of the extending direction of structure
Imaging size measures the buried depth of each flat-bottom hole 8 in the imaging of phased array B-scan；
Each above-mentioned reference block 7 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 once excites is 7, and array element firing order is that one chip in interval excites successively, sound
Beam working method is to be focused below R angle surfaces 2mm.Scanning spacing is 0.5mm, and the horizontal position setting of sampled signal door is flat
On 8 reflection echo of bottom outlet, the gain of ultrasonic phased array inspection instrument 4 is adjusted, respectively reaches the reflected signal amplitude of each flat-bottom hole 8
To the display screen of ultrasonic phased array inspection instrument 4 full-scale 80%, and the yield value of each flat-bottom hole 8 is recorded, then along comparison
The extending direction at the angles test block 7R respectively to each flat-bottom hole 8 in reference block 7 carry out the imaging of phased array C-scan and B-scan at
Picture measures each flat-bottom hole 8 with 6dB methods and prolongs in the extending direction of reference block 7R corner structures in the imaging of phased array C-scan
The characterization circular arc imaging size for stretching imaging size and the 3 upper edge circular arc of circular cross-section in reference block 7R corner structures, in phased array B
In scanning imagery, the buried depth of each flat-bottom hole 8 is measured；The characterization circular arc imaging size of each flat-bottom hole 8 is carried out as follows
It corrects, obtains the circular arc imaging size of the circular arc along the circular cross-section 3 of reference block 7R corner structures of each flat-bottom hole 8, correct 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, and h is
8 buried depth of flat-bottom hole, R are that 5 chip of curved surface linear array probe is distributed radius of curvature, and l is characterization circular arc imaging size；
If circular arc imaging size X and extension imaging size are all higher than 8 full-size(d) of corresponding flat-bottom hole, circular arc imaging
Size X is acoustic beam of the curved surface linear array probe 5 in reference block 7 at 8 position of corresponding flat-bottom hole in 3 upper edge circular arc of circular cross-section
Width, extension imaging size are extending direction of the curved surface linear array probe 5 in reference block 7 at 8 position of corresponding flat-bottom hole along the angles R
Beam width；
If in circular arc imaging size X and extension imaging size, there are one be less than or equal to 8 true ruler of corresponding flat-bottom hole
It is very little, then it re-works reference block 7 and the above-mentioned test process of repetition adds wherein being a difference in that on the position of the flat-bottom hole 8
The flat-bottom hole 8 of work smaller diameter size, diameter decreasing value is 0.2mm, until the circular arc imaging size X of the flat-bottom hole 8 and extension
Imaging size is all higher than 8 full-size(d) of corresponding flat-bottom hole.
Claims (3)
1. a kind of acoustic field measuring method of R corner structures ultrasonic phase array detection curved surface linear array probe, the R corner structures are connection
The circular arc curvature radius of the single-curvature arc surface (2) of two plate levels (1), single-curvature arc surface (2) is more than 3mm, is less than
The circular arc opening angle of 25mm, single-curvature arc surface (2) are more than 30 °, are less than 180 °, the single-curvature arc surface (2) is along circular arc
The section in direction is known as circular cross-section (3), and the thickness of circular cross-section (3) is identical as the thickness of plate level (1), the circular cross-section
(3) vertical with above-mentioned two plate level (1), supersonic detection device includes ultrasonic phased array inspection instrument (4), the spy of curved surface linear array
Head (5), encoder (6) and acoustic field pass through cable and coding with reference block (7), ultrasonic phased array inspection instrument (4)
Device (6), curved surface linear array probe (5) connection, the length on the extending direction of the angles R of reference block (7) are more than 200mm, the length
Direction is vertical with circular cross-section (3), material, R corner structures and the preparation process of reference block (7) and detected R corner structure phases
Together, it is characterised in that：The step of measurement method, is as follows：
Step 1: on three adjacent circular cross-sections (3) of reference block (7), by reference block (7) appearance it is inward-facing plus
The flat-bottom hole (8) of a diameter of 1mm of work, the distance between adjacent circular cross-section (3) is 25mm, on each circular cross-section (3)
Three flat-bottom holes (8) are processed, the position of three flat-bottom holes (8) is located at top, center, the bottom of circular arc on circular cross-section (3)
End, the center line (9) of three flat-bottom holes (8) is vertical with the tangent line of circular arc at the position, on three circular cross-sections (3) altogether
Nine flat-bottom holes (8) are machined with, wherein：
Three buried depths of flat-bottom hole (8) for being located at circular arc top on circular cross-section (3) are respectively：
A, the 1/3 of 0.5mm or circular cross-section (3) thickness, takes numerical value in the two small；
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 subtracts 0.5mm, takes numerical value in the two big；
Three buried depths of flat-bottom hole (8) for being located at center of arc on circular cross-section (3) are respectively：
A, the 1/3 of 0.5mm or circular cross-section (3) thickness, takes numerical value in the two small；
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 subtracts 0.5mm, takes numerical value in the two big；
Three buried depths of flat-bottom hole (8) for being located at circular arc bottom end on circular cross-section (3) are respectively：
A, the 1/3 of 0.5mm or circular cross-section (3) thickness, takes numerical value in the two small；
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 subtracts 0.5mm, takes numerical value in the two big；
Step 2: reference block (7) is placed in the sink, curved surface linear array probe (5) is by water coincidence in reference block (7)
On, the working method of setting curved surface linear array probe (5), scanning spacing is 0.5mm, and the horizontal position setting of sampled signal door is flat
On bottom outlet (8) reflection echo, the gain of ultrasonic phased array inspection instrument (4) is adjusted, makes the reflection signal of each flat-bottom hole (8) respectively
Amplitude reaches the display screen full-scale 80% of ultrasonic phased array inspection instrument (4), and records the yield value of each flat-bottom hole (8),
Then phased array C is carried out to each flat-bottom hole (8) in reference block (7) respectively along the extending direction at reference block (7) angles R to sweep
Imaging and B-scan imaging are retouched, in the imaging of phased array C-scan, each flat-bottom hole (8) is measured in reference block (7) R with 6dB methods
The table of the extension imaging size of the extending direction of corner structure and circular cross-section (3) upper edge circular arc in reference block (7) R corner structures
Circular arc imaging size is levied, in the imaging of phased array B-scan, measures the buried depth of each flat-bottom hole (8)；
Step 3: the characterization circular arc imaging size of each flat-bottom hole (8) is modified as follows, each flat-bottom hole is obtained
(8) along the circular cross-section (3) of reference block (7) R corner structures circular arc circular arc imaging size, correction 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 (7) R corner structures, and h is
Flat-bottom hole (8) buried depth, R are that curved surface linear array probe (5) chip is distributed radius of curvature, and l is characterization circular arc imaging size；
Step 4: if circular arc imaging size X and extension imaging size are all higher than corresponding flat-bottom hole (8) full-size(d), justify
Arc imaging size X is that curved surface linear array probe (5) corresponding flat-bottom hole (8) position in reference block (7) is on circular cross-section (3)
Along the beam width of circular arc, extension imaging size is curved surface linear array probe (5) corresponding flat-bottom hole (8) in reference block (7)
Along the beam width of the extending direction at the angles R at position；
If being less than or equal to corresponding flat-bottom hole (8) full-size(d) there are one in circular arc imaging size X and extension imaging size,
Then repeat the above steps one to three, wherein be a difference in that on the position of the flat-bottom hole (8), processing smaller diameter size it is flat
Bottom outlet (8), diameter decreasing value are 0.2mm, until the circular arc imaging size X and extension imaging size of the flat-bottom hole (8) are all higher than
Corresponding flat-bottom hole (8) full-size(d).
2. the acoustic field measuring method of R corner structures ultrasonic phase array detection curved surface linear array probe according to claim 1,
It is characterized in that：In step 1, on the same circular cross-section (3), between two adjacent flat-bottom holes (8), angularly between
Every reprocessing 1~2 flat-bottom hole (8) vertical with the tangent line of circular arc at the position, the buried depth of the flat-bottom hole (8) of reprocessing and before
One buried depth in three flat-bottom holes (8) of processing is equal.
3. the acoustic field measuring method of R corner structures ultrasonic phase array detection curved surface linear array probe according to claim 1,
It is characterized in that：In step 1, except three adjacent circular cross-section (3) both sides of reference block (7), it is further added by 2~4
Circular cross-section (3), the distance between each adjacent circular arc section (3) is equal, is 25mm, on each increased circular cross-section (3)
Three~seven flat-bottom holes (8) of equiangularly spaced processing, the position of these flat-bottom holes (8) include to be located at circular arc on circular cross-section (3)
Top, center, bottom end position, the center line (9) of increased flat-bottom hole (8) is vertical with the tangent line of circular arc at the position,
The buried depth of flat-bottom hole (8) is equal or unequal on increased circular cross-section (3), is one of following formula numerical value：
T/6、T/4、T/3、2T/3、3T/4、T5/6
In formula：T is circular cross-section (3) thickness.
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| CN106596721B (en) * | 2016-12-09 | 2019-01-22 | 株洲硬质合金集团有限公司 | The detection method of draw out mold arc surface internal flaw |
| CN107261345A (en) * | 2017-06-29 | 2017-10-20 | 哈尔滨医科大学 | A kind of method that utilization ultrasonic reflection echo measures internal sound field in real time |
| CN109709206B (en) * | 2017-10-26 | 2022-02-01 | 中国商用飞机有限责任公司 | Method for measuring defects of R-angle structure based on ultrasonic phased array technology |
| CN112147233B (en) * | 2020-09-27 | 2024-03-01 | 大唐东北电力试验研究院有限公司 | Ultrasonic detection reference block and method for curved surface longitudinal butt joint of pressure-bearing equipment |
| CN112763583B (en) * | 2021-04-07 | 2021-08-03 | 成都飞机工业（集团）有限责任公司 | Calibration block for ultrasonic phased array sector scanning and manufacturing and using methods |
| CN113899816B (en) * | 2021-09-10 | 2022-06-17 | 国营芜湖机械厂 | Ultrasonic nondestructive testing device and method for T-shaped composite structure and R-region testing method and device |
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