CN106802321A - A kind of point focusing formula linear array phased array detection means - Google Patents
A kind of point focusing formula linear array phased array detection means Download PDFInfo
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- CN106802321A CN106802321A CN201710002076.1A CN201710002076A CN106802321A CN 106802321 A CN106802321 A CN 106802321A CN 201710002076 A CN201710002076 A CN 201710002076A CN 106802321 A CN106802321 A CN 106802321A
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- curved surface
- phased array
- surface sound
- sound voussoir
- array probe
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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
- G01N29/04—Analysing solids
- G01N29/043—Analysing solids in the interior, e.g. by shear waves
-
- 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
- G01N29/24—Probes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
Abstract
The invention discloses a kind of point focusing formula linear array phased array detection means, including phased array probe and curved surface sound voussoir；Wherein, the curved surface sound voussoir two sides are parallel each other, and it is higher than opposite side to be provided with the side of the phased array probe；And, the curved surface sound voussoir bottom surface is in level, and upper surface is in curved surface.Therefore, the present invention without water logging coupled modes, but can realize that linear array phased array probe is realized focusing in two dimensions by contact method, so as to solve the problems, such as that ultrasonic energy is not concentrated, poor signal to noise, scan image have distortion.
Description
Technical field
The present invention relates to ultrasound field, a kind of point focusing formula linear array phased array detection means is particularly related to.
Background technology
At present, ultrasonic phased array technology is caused with its flexible acoustic beam deflection angle control and focal position control ability
People increasingly focus on.Linear array phased array probe is a kind of ultrasonic phase array form of most reduced form, its manufacture
Cost is relatively minimum, and control mode is also most to simplify relatively.It has the disadvantage to realize focusing in the one-dimensional square of array element distribution,
The shape of its focal zone is popped one's head in similar to usually used line focus.Such result brings two aspect influences：On the one hand
Energy is not enough concentrated causes signal to noise ratio relatively low, on the other hand easily causes picture distortion in C-scan result.
And in the prior art, there is researcher to realize linear array phased array probe in two dimensions by water logging mode
Focusing on degree, but in practical engineering application, contact method is the main application form of phased array probe, water logging phased array
Method is seldom applied and equipment is complicated, poor practicability.
The content of the invention
In view of this, it is phased it is an object of the invention to propose a kind of point focusing formula linear array based on contact method
Battle array detection means, without water logging coupled modes, but can realize linear array phased array probe in two dimensions by contact method
Realize focusing on degree, so as to solve the problems, such as that ultrasonic energy is not concentrated, poor signal to noise, scan image have distortion.
Visited based on the point focusing formula linear array phased array detection means that above-mentioned purpose, the present invention are provided, including phased array
Head and curved surface sound voussoir；Wherein, the curved surface sound voussoir two sides are parallel each other, and are provided with the side of the phased array probe
Higher than opposite side；And, the curved surface sound voussoir bottom surface is in level, and upper surface is in curved surface.
In some embodiments of the invention, there is bolt on phased array probe, there is screwed hole, the phase on curved surface sound voussoir
Control battle array probe is bolted with both curved surface sound voussoirs.
In some embodiments of the invention, the phased array probe is coupled with being scribbled on the curved surface sound voussoir contact surface
Agent.
In some embodiments of the invention, from the phased array probe with the curved surface sound voussoir contact surface most lower edge extremely
It is sawtooth side between the side most lower edge of the curved surface sound voussoir.
In some embodiments of the invention, the design process bag of the point focusing formula linear array phased array detection means
Include：
Parabolic surface where extension curved surface sound voussoir, sets up the parabolical extended line with detected member bottom surface phase
It is the rectangular coordinate system of origin at friendship；
Calculate the real focal length depth in curved surface sound voussoir；
According to the real focal length depth in the curved surface sound voussoir, phased array probe elongated central line and curved surface sound wedge are calculated
The distance of block bottom surface.
In some embodiments of the invention, the real focal length depth calculated in curved surface sound voussoir includes：
If parabolic equation is y2=-2px, then its focal point coordinate beWherein p>0；
P points abscissa is substituted into parabolic equation to understandPhased array probe center is obtained to prolong
Line long is with parabolical intersecting point coordinateDepth of focus F=p in the curved surface sound voussoir；
Ultrasonic wave is actual in detected member focuses at P', and its actual depth of focus is F', and
Wherein, C1It is the acoustic wave propagation velocity in curved surface sound voussoir, C2It is acoustic wave propagation velocity in detected member, the two parameters are
Constant；D is depth of focus of the ultrasonic wave in detected member.
F=p is substituted intoObtain real focal length depth
In some embodiments of the invention, the distance of phased array probe elongated central line and curved surface sound voussoir bottom surface is calculated
A=F'-D.
In some embodiments of the invention, the depth of focus F=p in the curved surface sound voussoir.
From the above it can be seen that the point focusing formula linear array phased array detection means that the present invention is provided, by institute
State that curved surface sound voussoir two sides are parallel each other, and it is higher than opposite side to be provided with the side of the phased array probe；And, the song
Face sound voussoir bottom surface is in level, and upper surface is in curved surface.So as to the point focusing formula linear array phased array detection means can
One-dimensional linear array phased array probe is set to realize focusing in the two-dimensional direction, it is to avoid to use the two-dimensional array phase of complicated and costliness
Control battle array probe.
Brief description of the drawings
Fig. 1 is the structural representation of embodiment of the present invention point focusing formula linear array phased array detection means；
Fig. 2 is the design principle figure of embodiment of the present invention point focusing formula linear array phased array detection means；
Fig. 3 is showing that embodiment of the present invention point focusing formula linear array phased array detection means is tested detected member
It is intended to；
Fig. 4 be using it is of the prior art detected member test without acoustic lens obtain two orthogonal cross-sectional internals
Ultrasonic sound field distribution situation；
Fig. 5 is tested detected member for embodiment of the present invention point focusing formula linear array phased array detection means
Two ultrasonic sound field distribution situations of orthogonal cross-sectional internal.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in more detail.
In one embodiment of the invention, as shown in figure 1, being embodiment of the present invention point focusing formula linear array phased array
The structural representation of detection means, the point focusing formula linear array phased array detection means includes phased array probe and curved surface sound
Voussoir.Wherein, the curved surface sound voussoir two sides are parallel each other, and it is higher than opposite side to be provided with the side of the phased array probe
Face.And, the curved surface sound voussoir bottom surface is in level, and upper surface is in curved surface.
It is preferred that there is bolt on phased array probe, there are screwed hole, the phased array probe and the song on curved surface sound voussoir
Both face sound voussoirs are bolted.Preferably, coupling is scribbled on the phased array probe and the curved surface sound voussoir contact surface
Mixture.Wherein, described couplant is generally machine oil or glycerine.
In another preferably embodiment, from the phased array probe with the curved surface sound voussoir contact surface most lower edge extremely
It is sawtooth side between the side most lower edge of the curved surface sound voussoir.Main purpose is, as diffusing reflection face, to absorb reflection
The acoustic beam for coming over, it is to avoid the influence that ultrasonic wave multiple reflections bring.
As an embodiment for referring to of the invention, as shown in Fig. 2 being examined according to point focusing formula linear array phased array
The design principle figure of device is surveyed, the design process of the point focusing formula linear array phased array detection means includes：
Step 201, the parabolic surface where extension curved surface sound voussoir is set up the parabolical extended line and is detected
Part bottom surface intersection is the rectangular coordinate system of origin.
Step 202, if parabolic equation is y2=-2px, then its focal point coordinate beWherein p>0.Root
According to parabolic line focus principle, ultrasonic wave focusing at focus P in curved surface sound voussoir, therefore the focal length depth in curved surface sound voussoir
It is F to spend.
Step 203, substitutes into P points abscissa parabolic equation and understandsTherefore (A points are A points
Phased array probe elongated central line and parabolical intersection point) coordinate isTherefore the depth of focus F in curved surface sound voussoir
=p.
Step 204, because detected member has differences with the acoustic impedance of sound voussoir, therefore ultrasonic wave reality in detected member
Focus at P', its actual depth of focus is F', and
Wherein, C1It is the acoustic wave propagation velocity in curved surface sound voussoir, C2It is acoustic wave propagation velocity in detected member, the two
Parameter is constant；D is depth of focus of the ultrasonic wave in detected member.It should be noted that ultrasonic wave is in detected member
Depth of focus D can be determined according to the process requirements of detected member.It is considered that D is known quantity, should be given in known conditions
Go out.
Step 205, F=p is substituted intoCan obtain：
Wherein, a suitable value is assigned to p from the angle conveniently installed and used, through experimental test, taking p=2 has preferably
Reflection.
Step 206, calculates phased array probe elongated central line with curved surface sound voussoir bottom surface apart from a=F'-D.Wherein, lead to
Cross determine phased array probe elongated central line and curved surface sound voussoir bottom surface apart from a, so as to just can be gone out with complete design described
Point focusing formula linear array phased array detection means.
It should be noted that with overlaying structure as subjects, using the point focusing formula linear array phase described in the invention
Control battle array detection means inspection built-up welding faying face quality, test method and detected object schematic diagram are as shown in Figure 3.In order to exactly
Adjustment detection sensitivity, makes flat-bottom hole artificial defect (FBH) as shown in Figure 3 using the mode of electrical discharge machining herein,
(overlaying structure is that the built-up welding of upper and lower materials at two layers is combined to flat-bottom hole bottom hole, it is believed that be different two-layer with material faying face
The clad metal sheet that metal is made, the faying face of two-ply is exactly the position of defect easily occur, therefore is namely closed herein
The detection position of note, it is therefore desirable to make focusing ultrasonic wave in the faying face.For example：The combination between copper coin and steel plate in Fig. 3
Face) it is concordant, it is used to simulate the defect on faying face.
Wherein, described flat-bottom hole is a kind of means for simulating uncombined defect, and flat-bottom hole bottom hole is combined with material
The concordant meaning in face is exactly that the uncombined defect on faying face is simulated with this means, is used to verify detectability and detection essence
Degree.
Preferably, it is possible to use electronic scanning come replace along perpendicular to the phased array probe direction of motion mechanical scanning, make
Carry out relative motion from phased array probe and detected member when C-scan is carried out, reduce the motion in one dimension free degree.
Analysis means are calculated by two different sound fields obtain under identical experiment parameter detected object at two just
The ultrasonic sound field distribution situation of the cross-sectional internal of friendship, as shown in Figure 4,5.Be can be seen that from the contrast of ultrasonic acoustic field distribution
Phased array probe ultrasonic acoustic field energy after improvement is concentrated, and is significantly better than conventional linear array phased array probe.Wherein, ultrasonic wave energy
Amount dispersion can cause the signal to noise ratio to reduce, while can also make the shape of defect, positional information that deviation occurs, not be inconsistent with actual conditions.
Additionally, the time needed for the whole test specimen Scanning Detction of point focusing formula linear array phased array detection means of the present invention will
The time required to being popped one's head in far fewer than conventional single piece, detection efficiency is improve.It is additionally, since and eliminates point focusing formula linear array phase
Control battle array detection means also eliminates many troubles brought using water immersion focusing, so as to reduce system along the motion of X-direction
Complexity, usability and practicality obtained great lifting.
In sum, the point focusing formula linear array phased array detection means that the present invention is provided, creatively proposes point
Segmentation；And, described point focusing formula linear array phased array detection means is not influenceed by scantling and shape, quotes model
Enclose wide, detection efficiency is high；Go for the detection of water coincidence formula C-scan；At the same time, the present invention is without using expensive face type
Or the phased array system of particular array form, most simple linear array phased array probe is only needed, greatly save cost；Shortening is opened
In the hair cycle, reduce the complexity of phased array devices and control system；Finally, whole described point focusing formula linear array is phased
Battle array detection means is compact, it is easy to accomplish.
Those of ordinary skill in the art should be understood：Specific embodiment of the invention is the foregoing is only, and
The limitation present invention, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. are not used in,
Should be included within protection scope of the present invention.
Claims (8)
1. a kind of point focusing formula linear array phased array detection means, it is characterised in that including phased array probe and curved surface sound wedge
Block；Wherein, the curved surface sound voussoir two sides are parallel each other, and it is higher than opposite side to be provided with the side of the phased array probe；
And, the curved surface sound voussoir bottom surface is in level, and upper surface is in curved surface.
2. device according to claim 1, it is characterised in that have bolt on phased array probe, have spiral shell on curved surface sound voussoir
Both pit, the phased array probe and described curved surface sound voussoir are bolted.
3. device according to claim 1, it is characterised in that the phased array probe and the curved surface sound voussoir contact surface
On scribble couplant.
4. device according to claim 1, it is characterised in that contacted with the curved surface sound voussoir from the phased array probe
Face most lower edge between the side most lower edge of the curved surface sound voussoir be sawtooth side.
5. the device according to claim 1-4 any one, it is characterised in that the point focusing formula linear array phased array
The design process of detection means includes：
Parabolic surface where extension curved surface sound voussoir, sets up the parabolical extended line and detected member bottom surface intersection
It is the rectangular coordinate system of origin；
Calculate the real focal length depth in curved surface sound voussoir；
According to the real focal length depth in the curved surface sound voussoir, phased array probe elongated central line and curved surface sound voussoir bottom are calculated
The distance in face.
6. device according to claim 5, it is characterised in that the real focal length deep packet in the calculating curved surface sound voussoir
Include：
If parabolic equation is y2=-2px, then its focal point coordinate beWherein p>0；
P points abscissa is substituted into parabolic equation to understandObtain phased array probe elongated central line
It is with parabolical intersecting point coordinateDepth of focus F=p in the curved surface sound voussoir；
Ultrasonic wave is actual in detected member focuses at P', and its actual depth of focus is F', andWherein,
C1It is the acoustic wave propagation velocity in curved surface sound voussoir, C2It is acoustic wave propagation velocity in detected member, the two parameters are constant；D
The depth of focus for being ultrasonic wave in detected member.
F=p is substituted intoObtain real focal length depth
7. device according to claim 6, it is characterised in that calculate phased array probe elongated central line and curved surface sound voussoir
Bottom surface apart from a=F'-D.
8. device according to claim 5, it is characterised in that the depth of focus F=p in the curved surface sound voussoir.
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Cited By (4)
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| CN108918677A (en) * | 2018-08-06 | 2018-11-30 | 中国计量大学 | A kind of ultrasonic phase array detection method of line for polyethylene gas pipes sweat soldering connector |
| CN113075297A (en) * | 2021-05-06 | 2021-07-06 | 西部超导材料科技股份有限公司 | Titanium alloy phased array linear array ultrasonic detection sound field model construction method |
| JP7022861B1 (en) | 2021-06-25 | 2022-02-18 | 株式会社日立パワーソリューションズ | Array type ultrasonic transmitter / receiver |
| CN114577907A (en) * | 2021-12-31 | 2022-06-03 | 哈尔滨工业大学（深圳） | Curved panel member damage detection method and system and storage medium |
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| CN114577907A (en) * | 2021-12-31 | 2022-06-03 | 哈尔滨工业大学（深圳） | Curved panel member damage detection method and system and storage medium |
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Application publication date: 20170606 |