CN104359980A - Sawtooth-shaped columnar ultrasonic phased array transducer - Google Patents
Sawtooth-shaped columnar ultrasonic phased array transducer Download PDFInfo
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- CN104359980A CN104359980A CN201410682620.8A CN201410682620A CN104359980A CN 104359980 A CN104359980 A CN 104359980A CN 201410682620 A CN201410682620 A CN 201410682620A CN 104359980 A CN104359980 A CN 104359980A
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- car axle
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Abstract
The invention discloses a sawtooth-shaped columnar ultrasonic phased array transducer which can be use for detecting longitudinal cracks in a hollow car axle and in the outer surface of the hollow car axle. The transducer comprises a transducer base and transducer array elements, wherein the transducer base is columnar; the outer contour of the columnar base is in a sawtooth shape; a piezoelectric crystal plate is arranged on the same side of each tooth shape of the columnar base so as to form the multiple annular transducer array elements which are uniformly distributed; and the transducer array elements do not interfere or influence one another. The proper number of the transducer array elements is selected, and a corresponding control timing sequence is set, so that the expected transverse wave sound beam focusing of the sawtooth-shaped columnar ultrasonic phased array transducer is realized in the tested hollow car axle, and large-deflection dynamic focusing can be realized at the position at which each transducer array element is positioned. According to the transducer disclosed by the invention, the defects inside the hollow car axle can be detected, peripheral scanning imaging is realized without rotary mechanical drive, and an effect of better detecting the longitudinal cracks in the outer surface of the hollow car axle can be achieved.
Description
Technical field
The present invention relates to a kind of motor train unit hole-bored axle from end to end failure detector, particularly a kind of serrate columnar ultrasound phase array transducer that can be used for hole-bored axle from end to end inside and the detection of outside surface longitudinal crack.
Background technology
In the detection of traditional hole-bored axle from end to end outside surface longitudinal crack, employing be tangential transducer probe containing single piezoelectric chip, namely ultrasonic incident direction is positioned at cross section perpendicular to axial direction, and incident ray is without axle center.This transducer is installed on a turning axle, and while mechanical rotation, transducer completes the scanning flaw detection of whole circumference with the form of internal loopback.Due to the existence of rotational freedom, make plant machinery complex structure, the scan efficiency of this form is low in addition, resolution is low.
Publication number is propose a kind of cylindricality phased array well week scanning ultrasonic transducer in the patent of CN200985790Y, piezoelectric chip array element is distributed in cylindricality matrix surrounding ringwise, by adopting dynamic focusing and deflection technique can realize circumferentially focusing scanning, rotating without the need to machinery, simplifying physical construction.Because the surface normal of each piezoelectric chip distributed ringwise is all through matrix axis, therefore its deflection angle is limited, focusing effect and the detection perform of large deflection angle degree all decline, and for the longitudinal crack of hole-bored axle from end to end, larger deflection angle is needed to obtain stronger flaw echo, to obtain reliable flaw detection effect.Simultaneously this distribution form each piezoelectric chip is produced in hole-bored axle from end to end steel acoustic beam based on compressional wave, and compressional wave wavelength is greater than shear wave, therefore relatively low to the resolution of crack-detecting.Therefore be badly in need of the sound beam focusing deflection angle that a kind of transducer can provide larger, and realize detecting a flaw to longitudinal crack etc. with shear wave acoustic beam, thus improve flaw detection resolution.
Summary of the invention
Technical matters solved by the invention is to provide a kind of serrate columnar ultrasound phase array transducer that can be used for hole-bored axle from end to end inherent vice and the detection of outside surface longitudinal crack, can focus in hole-bored axle from end to end with shear wave acoustic beam.The present invention, by changing transducer array tuple, can complete the scanning of whole circumference, realize the accurate flaw detection to hole-bored axle from end to end inherent vice and outside surface longitudinal crack when mechanical motion without spin.
Technical scheme of the present invention is as follows:
This serrate columnar ultrasound phase array transducer, comprises transducer matrix and transducer array element, it is characterized in that, 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, form multiple equally distributed transducer array element ringwise, 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 greater than 90 ° and is less than 180 °.
Preferably, described piezoelectric chip geomery is consistent, is strip.
Preferably, described transducer matrix adopts hollow cylindrical.
The present invention compared with prior art, has the following advantages and the technique effect of high-lighting: the present invention adopts specific transducer array element angle of inclination, can realize the dynamic focusing of large deflection angle degree.The ultrasound wave of each array element transmitting is oblique is simultaneously mapped in medium, can focus on, improve flaw detection resolution in hole-bored axle from end to end with shear wave acoustic beam.
Accompanying drawing explanation
Fig. 1 is perspective view of the present invention.
Fig. 2 is the vertical 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 array element of the present invention transmitting and receiving ultrasound process schematic diagram.
Fig. 5 is 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.
Embodiment
The present invention is described in detail with reference to the accompanying drawings.
As depicted in figs. 1 and 2, serrate columnar ultrasound phase array transducer provided by the invention comprises transducer matrix 1 and transducer array element, and its transducer matrix is column, the outline indention of columnar shape basal; All arrange piezoelectric chip 2 in the same side of each profile of tooth of columnar shape basal, form multiple equally distributed transducer array element ringwise, multiple transducer array unit composition array, each piezoelectric chip in array independently can control its launching and receiving process.
In this preferred embodiment, piezoelectric chip 2 size is consistent, is strip.Transducer matrix 1 is buffering insulating medium, i.e. mutually insulated between each array element, makes the isolation on realizing circuit between each array element, and each transducer array element can independent transmission and receive ultrasound wave, does not interfere with each other.The adjacent surface angulation of the adjacent profile of tooth of transducer columnar shape basal is greater than 90 ° and is less than 180 °, ensure piezoelectric chip produce by ultrasound wave not stop by adjacent profile of tooth.
The employing of serrate columnar ultrasound phase array transducer is multiple has specific inclination angle and the transducer array tuple toothing columnar ultrasound phase array transducer of annular distribution, can complete the scanning of whole circumference in hole-bored axle from end to end axis hole.The present invention can provide the shear wave sound beam focusing of large deflection angle degree, can detect hole-bored axle from end to end outside surface longitudinal crack more exactly, improves flaw detection resolution.The present invention carries out circumferential scanning flaw detection by changing transducer array tuple successively, does not need Rotational mechanical movement, efficiently can complete the flaw detection of hole-bored axle from end to end.
Hereinafter, by serrate columnar ultrasound phase array transducer referred to as transducer.Can be produced based on certain pumping signal postponing rule by control circuit, control the focal position harmony beam intensity of acoustic beam, the pumping signal of each passage acts in each array element selected in transducer respectively, completes transmitting and receiving each time.
Just Fig. 3, Fig. 4, Fig. 5 flaw detection process to transducer is further described below.
First the process of transducers transmit ultrasonic waves is set forth.
Computing relay rule in a computer, selected hyperacoustic probe to be launched, adjustment is about to the ultrasonic parameters launched, above data are transferred to slave computer, slave computer carries out thick time delay, final signal delay is obtained again by emission fine Postponement module, corresponding time delay pulse signal is produced by PC control high-voltage power supply, this pumping signal acts on selected piezoelectric chip 2 after DA conversion, thus produce multi beam ultrasound wave, each bundle ultrasound wave is successively by coupling layer 3 and hole-bored axle from end to end steel 4, finally focus on hole-bored axle from end to end outside surface longitudinal crack 5 with larger deflection angle.By changing the time delay of different array element, the acoustic beam produced by given array element 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 the nearly outside surface circumference 360 ° of whole hole-bored axle from end to end.
The hyperacoustic process of following description receive MUT.
The ultrasound wave that transducer piezoelectric chip 2 is launched is launched by hole-bored axle from end to end outside surface longitudinal crack 5, transmitted wave is through hole-bored axle from end to end steel 4 and oil film coupling layer 3, arrive piezoelectric chip 2, convert corresponding electric signal to, this signal is controlled to carry out programming amplifying by slave computer after amplitude limit isolation, then through pre-filtering process, then carries out AD conversion, carry out the time delay processing of Received signal strength and buffer memory in AD conversion module, then carry out digital filtering by slave computer.The digital data transmission crossed through aforementioned processing, to computing machine, is carried out corresponding stacking image by computing machine and shows
User, according to the image of display, judges whether existing defects, and the position residing for defect, thus completes the flaw detection process of whole hole-bored axle from end to end outside surface longitudinal crack.By changing the depth of focus, this transducer also can detect hole-bored axle from end to end inherent vice.
Claims (4)
1. a serrate columnar ultrasound phase array transducer, comprises transducer matrix (1) and transducer array element, it is characterized in that, transducer matrix is column, the outline indention of columnar shape basal; All arrange piezoelectric chip (2) in the same side of each profile of tooth of columnar shape basal, form multiple equally distributed transducer array element ringwise, mutually insulated between each array element.
2. a kind of serrate columnar ultrasound phase array transducer as claimed in claim 1, it is characterized in that, the adjacent surface angulation of the adjacent profile of tooth of described columnar shape basal is greater than 90 ° and is less than 180 °.
3. a kind of serrate columnar ultrasound phase array transducer as claimed in claim 1 or 2, is characterized in that, described piezoelectric chip geomery is consistent, is strip.
4. a kind of serrate columnar ultrasound phase array transducer as claimed in claim 1 or 2, is characterized in that, transducer matrix adopts 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 |
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| CN104359980A true CN104359980A (en) | 2015-02-18 |
| CN104359980B CN104359980B (en) | 2017-01-04 |
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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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Cited By (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 |
Citations (6)
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| GB1514050A (en) * | 1975-09-15 | 1978-06-14 | Australia Dept Of Health | Apparatus for the ultrasonic examination of an object |
| 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 |
| CN102497820A (en) * | 2009-09-03 | 2012-06-13 | 皇家飞利浦电子股份有限公司 | Ultrasound probe with large field of view and method for fabricating such ultrasound probe |
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2014
- 2014-11-24 CN CN201410682620.8A patent/CN104359980B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1514050A (en) * | 1975-09-15 | 1978-06-14 | Australia Dept Of Health | Apparatus for the ultrasonic examination of an object |
| 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 |
| CN102497820A (en) * | 2009-09-03 | 2012-06-13 | 皇家飞利浦电子股份有限公司 | Ultrasound probe with large field of view and method for fabricating such ultrasound probe |
Non-Patent Citations (4)
| Title |
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| JÉROME POGUET ET AL.: "Phased Array technology Concepts, probes and applications", 《8TH EUROPEAN CONGRESS ON NON DESTRUCTIVE TESTING》 * |
| 李衍，李明东: "超声波阵列探头的结构和特性", 《无损探伤》 * |
| 牛卫飞等: "超声相控阵在游乐设施轴类检测中的应用", 《无损检测》 * |
| 蒋承君，巨西民: "海上油气输送管道对接环焊缝的相控阵检测技术", 《内蒙古石油化工》 * |
Cited By (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 |
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| CN104359980B (en) | 2017-01-04 |
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