CN104359980B - A kind of zigzag columnar ultrasound phase array transducer - Google Patents
A kind of zigzag columnar ultrasound phase array transducer Download PDFInfo
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- CN104359980B CN104359980B CN201410682620.8A CN201410682620A CN104359980B CN 104359980 B CN104359980 B CN 104359980B CN 201410682620 A CN201410682620 A CN 201410682620A CN 104359980 B CN104359980 B CN 104359980B
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Abstract
A kind of zigzag columnar ultrasound phase array transducer, can be used for hole-bored axle from end to end inside and the detection of outer surface longitudinal crack.This transducer comprises transducer matrix and transducer array element；Transducer matrix is column, the outline indention of columnar shape basal.All arrange piezoelectric chip in the same side of each profile of tooth of columnar shape basal, constitute the most equally distributed multiple transducer array element.It does not interfere with each other between described transducer array element or affect.The present invention is by selecting suitable transducer array element quantity the corresponding sequential that controls of setting to make zigzag columnar ultrasound phase array transducer realize intended shear wave sound beam focusing in tested hole-bored axle from end to end, and each transducer array element location can realize the dynamic focusing of big drift angle.The present invention can not only carry out the detection of hole-bored axle from end to end internal flaw and carry out circumferential scanning imaging in the case of Mechanical Driven without spin, moreover it is possible to hole-bored axle from end to end outer surface longitudinal crack is embodied more preferable Detection results.
Description
Technical field
The present invention relates to a kind of EMUs hole-bored axle from end to end failure detector, can be used for hole-bored axle from end to end inside and outer surface particularly to one
The zigzag columnar ultrasound phase array transducer of longitudinal crack detection.
Background technology
In the detection of traditional hole-bored axle from end to end outer surface longitudinal crack, use the tangential transducer containing single piezoelectric chip and visit
Head, the most ultrasonic incident direction is located normal in axial cross section, and line of incidence is without axle center.This transducer is installed on one
In rotary shaft, while mechanical rotation, transducer completes the scanning flaw detection of whole circumference with the form of internal loopback.Owing to rotating
The existence of degree of freedom, makes plant machinery structure complicate, and the scan efficiency of this form is low in addition, resolution is low.
The patent of Publication No. CN200985790Y proposes a kind of cylindricality phased array well week scanning ultrasonic transducer, piezo crystals
Sheet array element is distributed in cylindricality matrix surrounding ringwise, by using dynamic focusing and deflection technique can realize circumferentially focusing on scanning,
Rotate without machinery, simplify frame for movement.Owing to the surface normal of each piezoelectric chip being distributed ringwise is all through matrix axis,
Therefore its deflection angle is limited, and the focusing effect of large deflection angle degree and detection performance all decline, and indulge for hole-bored axle from end to end
To crackle, bigger deflection angle is needed to obtain stronger flaw echo, to obtain reliable flaw detection effect.This distribution simultaneously
Form makes acoustic beam that each piezoelectric chip produces in hole-bored axle from end to end based on compressional wave, and compressional wave wavelength is more than shear wave, therefore to crackle
The resolution of flaw detection is relatively low.Therefore it is badly in need of a kind of transducer and is provided that bigger sound beam focusing deflection angle, and realize with horizontal stroke
Longitudinal crack etc. is detected a flaw by wave sound bundle, thus improves flaw detection resolution.
Summary of the invention
Technical problem solved by the invention be to provide a kind of can be used for hole-bored axle from end to end internal flaw and outer surface longitudinal crack detection
Zigzag columnar ultrasound phase array transducer, can be focused with shear wave acoustic beam in hole-bored axle from end to end.The present invention is by changing transducing
Device array element group, can complete the scanning of whole circumference in the case of mechanical movement without spin, it is achieved to hole-bored axle from end to end internal flaw and
The accurate flaw detection of outer surface longitudinal crack.
Technical scheme is as follows:
This zigzag columnar ultrasound phase array transducer, comprises transducer matrix and transducer array element, it is characterised in that transducer
Matrix is column, the outline indention of columnar shape basal；Piezoelectric chip is all arranged in the same side of each profile of tooth of columnar shape basal,
Constitute the most equally distributed multiple transducer array element, be independent of each other between each array element.Mutually insulated between each array element.
Preferably, the adjacent surface angulation of the adjacent profile of tooth of described columnar shape basal is more than 90 ° and less than 180 °.
Preferably, described piezoelectric chip geomery is consistent, for strip.
Preferably, described transducer matrix uses hollow cylindrical.
The present invention compared with prior art, has the following advantages and the technique effect of salience: the present invention uses specific transducer
Array element angle of inclination, can realize the dynamic focusing of large deflection angle degree.The ultrasound wave of the most each array element transmitting is oblique to be mapped in medium,
Can be focused with shear wave acoustic beam in hole-bored axle from end to end, improve flaw detection resolution.
Accompanying drawing explanation
Fig. 1 is the perspective view of the present invention.
Fig. 2 is the top view of Fig. 1 structure.
Fig. 3 is the schematic diagram that the present invention works in hole-bored axle from end to end.
Fig. 4 is that the array element of the present invention is launched and receives ultrasound process schematic diagram.
Fig. 5 is the flaw detection Principle of Process figure of the present invention.
In figure: 1-transducer matrix；2-piezoelectric chip；3-coupling layer；4-hole-bored axle from end to end；5-longitudinal crack.
Detailed description of the invention
The present invention is described in detail with reference to the accompanying drawings.
As depicted in figs. 1 and 2, the zigzag columnar ultrasound phase array transducer that the present invention provides comprises transducer matrix 1 and changes
Energy device array element, its transducer matrix is column, the outline indention of columnar shape basal；Same in each profile of tooth of columnar shape basal
Piezoelectric chip 2 is all arranged in side, constitutes the most equally distributed multiple transducer array element, and multiple transducer array units form one
Array, each piezoelectric chip in array can independently control it and launch and reception process.
In this preferred embodiment, piezoelectric chip 2 size is consistent, for strip.Transducer matrix 1 is buffering dielectric,
Mutually insulated between the most each array element, makes the isolation realizing on circuit between each array element, and each transducer array element can independent transmission and reception
Ultrasound wave, does not interfere with each other.The adjacent surface angulation of the adjacent profile of tooth of transducer columnar shape basal is more than 90 ° and less than 180 °, it is ensured that
Piezoelectric chip produce by ultrasound wave do not stopped by adjacent profile of tooth.
Zigzag columnar ultrasound phase array transducer uses multiple transducer array unit composition sawtooth with specific inclination angle and annular distribution
Shape columnar ultrasound phase array transducer, can complete the scanning of whole circumference in hole-bored axle from end to end axis hole.The present invention can provide big inclined
The shear wave sound beam focusing of gyration, can more accurately detect hole-bored axle from end to end outer surface longitudinal crack, improves flaw detection resolution.This
Invention carries out circumferential scanning flaw detection by changing transducer array tuple successively, it is not necessary to Rotational mechanical movement, can efficiently complete hollow
The flaw detection of axletree.
Hereinafter, zigzag columnar ultrasound phase array transducer is referred to as transducer.By control circuit can produce based on
Certain pumping signal postponing rule, controls the focal position harmony beam intensity of acoustic beam, and the pumping signal of each passage is respectively acting on
In each array element selected in transducer, complete transmitting each time and reception.
Hereinafter the flaw detection process of transducer is further described by Fig. 3, Fig. 4, Fig. 5.
First illustrate that the process of ultrasound wave launched by transducer.
Computing relay rule in a computer, the probe of selected ultrasound wave to be launched, adjust the ultrasonic parameters that will launch, will
Data above is transferred to slave computer, and slave computer carries out thick time delay, then obtains final signal delay by launching thin Postponement module,
Being produced corresponding time delay pulse signal by PC control high-voltage power supply, this pumping signal acts on selected pressure after DA changes
Electricity wafer 2, thus produce multi beam ultrasound wave, each bundle ultrasound wave passes sequentially through coupling layer 3 and hole-bored axle from end to end 4, finally with bigger
Deflection angle focuses on hole-bored axle from end to end outer surface longitudinal crack 5.By changing the time delay of different array element, given array element produce
Acoustic beam can produce the focusing of different deflection angle in the nearly outer surface of hole-bored axle from end to end.Change selected transducer piezoelectric chip 2 successively,
Transducer can be made to complete the scanning of whole hole-bored axle from end to end nearly outer surface circumference 360 °.
Next describe transducer and receive the process of ultrasound wave.
The ultrasound wave that transducer piezoelectric chip 2 is launched is launched by hole-bored axle from end to end outer surface longitudinal crack 5, and transmitted wave is through hollow car
Axle 4 and oil film coupling layer 3, arrive piezoelectric chip 2, be converted into the corresponding signal of telecommunication, this signal through amplitude limit isolate after by bottom
Machine controls to carry out programming amplifying, then processes through pre-filtering, is then AD converted, is received in AD conversion module
The time delay processing of signal also caches, then carried out digital filtering by slave computer.The digital data transmission crossed through aforementioned processing to computer,
Carried out corresponding stacking image by computer and show
User is according to the image of display, it may be judged whether existing defects, and defect location, thus completes whole sky
The flaw detection process of heart axletree outer surface longitudinal crack.By changing the depth of focus, this transducer also can be to hole-bored axle from end to end internal flaw
Detect.
Claims (4)
1. a zigzag columnar ultrasound phase array transducer, comprises transducer matrix (1) and transducer array element, it is characterised in that
Transducer matrix is column, the outline indention of columnar shape basal；Pressure is all arranged in the same side of each profile of tooth of columnar shape basal
Electricity wafer (2), constitutes the most equally distributed multiple transducer array element, mutually insulated between each array element.
2. a kind of zigzag columnar ultrasound phase array transducer as claimed in claim 1, it is characterised in that described columnar shape basal
The adjacent surface angulation of adjacent profile of tooth is more than 90 ° and less than 180 °.
3. a kind of zigzag columnar ultrasound phase array transducer as claimed in claim 1 or 2, it is characterised in that described piezoelectricity
Wafer shape consistent size, for strip.
4. a kind of zigzag columnar ultrasound phase array transducer as claimed in claim 1 or 2, it is characterised in that transducer matrix
Use hollow cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410682620.8A CN104359980B (en) | 2014-11-24 | 2014-11-24 | A kind of zigzag columnar ultrasound phase array transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410682620.8A CN104359980B (en) | 2014-11-24 | 2014-11-24 | A kind of zigzag columnar ultrasound phase array transducer |
Publications (2)
| Publication Number | Publication Date |
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| CN104359980A CN104359980A (en) | 2015-02-18 |
| CN104359980B true CN104359980B (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410682620.8A Active CN104359980B (en) | 2014-11-24 | 2014-11-24 | A kind of zigzag columnar ultrasound phase array transducer |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321043A (en) * | 2016-10-17 | 2017-01-11 | 广汉市思科信达科技有限公司 | Rotary ultrasonic transducer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1201197A (en) * | 1975-09-15 | 1986-02-25 | Commonwealth Of Australia (The) | Variable focus transducer |
| JPH0510933A (en) * | 1991-07-02 | 1993-01-19 | Toppan Printing Co Ltd | Ultrasonic sensor and ultrasonic spectrum microscope using the same |
| CN200985790Y (en) * | 2006-09-19 | 2007-12-05 | 中国海洋石油总公司 | Column aspect phased array circumferential well scan supersonic transducer |
| CN101363314A (en) * | 2008-09-19 | 2009-02-11 | 辽河石油勘探局 | Ultrasound phased array cased well and front sounding integration detecting method |
| CN201378102Y (en) * | 2009-03-06 | 2010-01-06 | 林俊明 | Simple motor car hollow shaft electromagnetic/acoustic detecting device |
| US20120143063A1 (en) * | 2009-09-03 | 2012-06-07 | Koninklijke Philips Electronics N.V. | Ultrasound probe with large field of view and method for fabricating such ultrasound probe |
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2014
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| CN104359980A (en) | 2015-02-18 |
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