• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1495536 Ultrasound reflectors COMMISSARIAT A L'ENERGIE ATOMIQUE 23 Dec 1974 [26 Dec 1973] 55424/74 Heading H4X A tubular part having a cylindrical surface of radius R is tested for flaws using a reflector which reflects ultrasonic waves, produced by a transducer and beamed parallel to the axis OZ of the tubular part, on to the tubular part at a constant angle of incidence such that lamb waves are launched in the surface of the tubular part. The intersections of the wave front with the cylindrical surface define a helix of uniform pitch 2#<SP>R</SP> tan# measured along the axis OZ, the angle # being the angle between the tangent to the helix and the plane at right angles to the axis OZ, the reflector having a reflecting surface which is a portion of the surface which has the equation expressed in polar co-ordinates (p, #) of axis OZ the angles α and j being related to the angles i and # by the relationships tan j = tan i cos # and cos 2α = t sin i sin #. In a modification the reflecting surface of the reflector is a portion of the surface which has the equation expressed in polar co-ordinates of axis OZ: the angle # being zero and the angle α being 45 degrees whereby the reflected beam is incident on the surface on spaced parallel circles which are transverse cross-sections of the tubular part. Fig. 6 shows a practical embodiment of a reflector M inside a tube 68 to be flaw tested and which reflects a beam of ultrasonic waves emitted by a transducer 66. Fig. 7 shows an external reflector for flaw testing a right circular cylinder 201. A common transducer may be used as emitter and receiver. Where the reflector and transducer are located inside the tubular part to be tested such part is preferably filled with a couplant liquid, e.g. water. Where the reflector and transducer are located outside the tabular part to be tested the complete assembly is preferably immersed in a couplant liquid.
    公开号:SU740163A3
    申请号:SU732532304
    申请日:1973-12-26
    公开日:1980-06-05
    发明作者:Пердижон Жан
    申请人:Комиссариат А Л"Энержи Атомик (Фирма)；
    IPC主号:
    专利说明:

     The invention relates to non-destructive testing and can be used for ultrasonic inspection of cylindrical products. A deflector is known, which is a cone made of an elastic material with a certain reflective band, equipped with a taper regulator acting on its verain and intended to convert a beam of rays directed parallel to the axis of the product into a beam of rays with a constant angle of incidence t product surface 11. The disadvantage of this deflector is the low productivity of the control. The aim of the invention is to increase the productivity of the control. This is achieved by the fact that the reflecting surface of the deflector is formed by a surface that in polar coordinates (p, Q) with the axis OZ, which coincides with the longitudinal axis of the product, is selected from the relation: Z-ctg v --R 5 J R-s4®. where L and j are determined from the equations:. -:; 2- tgj tgbco5p, and co92A Sin-sin where and is the radius of the f, and ANGLE between the tangents to the 1-nth line formed on the product of the incidence of the rays, and the plane that is perpendicular to the specimen. In addition, for the purpose of detecting the accuracy of longitudinal defects, the reflector surface of the deflector was selected as follows; f- from the ZiV -RVini tRSini ratio in tfa of FIG. Figure 1 shows the geometrical parameters of the path of the rays, which follow the circular continuous {H) helix onto the surface of the round straight cylinder C with a radius Rj in FIG. 2 - scheme of the spiral deflector; in FIG. 3 variant of the control circuit of an eLeli with the help of a spiral deflector. , FIG. 1 shows that the PM beam parallel to the axis 02 of Cylinder C falls on the surface of the deflector (not shown) at point H, forming the angle L with the perpendicular Tf to the surface of the deflector at this point. The reflected MA deflector beam falls on the surface of the cylinder; c at point A, forming with the perpendicular N A to the plane tangent to the cylinder C at this point is the angle i pade. The projection AE of the MA beam is also the projection of the perpendicular TG to any; The plane, perpendicular to the PZ axis, forms an angle j with the perpendiculars of CeoM NA or its projection onto the same surface. ,, It is possible to ensure that, if the angle i pade is ensured, no rays reflected by the deflector on the cylinder top C, the projections of the perpendiculars 1l to each point of the surface of the deflector on the plane, perpendicular-axes 02, for example, the CSU, cover a circle with radius RSinj (in Fig. 1, a circle passing through point P). In the case of rays falling under a constant coal) on the surface of cylinder C in a spiral H, passing through point A, tangent to this spiral at any point forms a constant angle p with a plane perpendicular to the axis OZ, for example, HOA. The properties of the projections perpendicular to the RGK deflector on the HOU plane ,. which enclose a circle with radius Bsinj, determine that the section of the surface of the deflector with this plane is the evolvent of a circle with radius B-glhJ, with angle j associated with angles i and ft with ratio; tgi tgi-cosp The very same surface of the deflector, which converts a beam of rays directed parallel to the axis of the product and falling on its surface at an angle d into a beam of rays with a constant angle of incidence on the surface of the product along the Wijt line from the corner to her and with the plane perpendicular to the axis of the product, and with the pitch SlTR-igp ,, described in polar coordinates (E, 0) by the relation: sinj + R sinj in,
    where L and j are associated with i and p
    APPROACHES:
    tgi tgi-cosp cos2 A Sm-sinp
    FIG. .2 shows the deflector equation:
    zWp -R Sini R-sinie,
    determined on the basis of straight line generators for the case when it surrounds the cylinder 2 with radius R, and Э О, Л 45 °.
    权利要求:
    Claims (1)
    [1]
    1. Deflector, used for ultrasonic flaw detection of products and intended to convert a beam of rays: directed parallel to the axis of the product, into a beam of rays with a constant angle of incidence I on the surface of the product, characterized in that, in order to increase the monitoring performance, the reflecting surface the deflector is formed by a surface that is in polar coordinates (p, c) with the axis OZ. The first straight-line forming 3 departs from point A located on circle 4 with radius B-slnj. This forming is located in plane 5 tangent to the cylinder, where it lies circle 4. Forming 3 forms (in this case L) with the plane perpendicular OZ axis. The second generatrix b, corresponding to the DIRECT. Departure from point c. The plane is located on the generator cylinder with a radius of K-sin at a distance from the plane in which the point A is equal to - Sie-fJii -. This generator lies in a plane tangential to the cylinder with a radius of K-81pZiosyu 02, and forms a plane. Perpendicular axis 02i. Forms 7, 8 and 9 are obtained in the same way. Forming 9 leaves the point C located on the cylinder with radius R-sinj, the segment AC is parallel to axis 02, and its length is 25rRsinjigo Forming 9 is parallel to generatrix 3. Since p 0 and a 45, the rays reflected by the deflector M fall on the part 2 in a plane that is perpendicular to the generators. FIG. 3 shows the case where the deflector 10 and the transducer 11 are located inside a controlled cylinder 12 with an inner radius P. The deflector works as follows. Beams 13-15 emitted by the transducer 11 are reflected by the deflector 10 and fall onto the inner surface of the product 12 under constant angle. Thus, the use of this deflector ensures the constancy of the angle of incidence of the rays on the product in the form of a round straight cylinder with a radius R along a helical line with an angle of 6 between the tangents to it and the plane that is perpendicular to conductive article, and step g which allows better control performance.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU740163A3|1980-06-05|Deflector
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    Adler et al.1972|Interference effect in a multifrequency ultrasonic pulse echo and its application to flaw characterization
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    ES477568A1|1979-06-16|A Device for Ultrasonic Inspection of the Quality of a Tubular Part
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    RU2042946C1|1995-08-27|Ultrasonic device for automatic quality inspection of metal of pipe-lines
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    SU1762224A1|1992-09-15|Meter for determination of direction diagram of ultrasound flaw detector converters
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    JPS6269161A|1987-03-30|Ultrasonic flaw inspection method and its device
    SU836518A1|1981-06-07|Method of measuring geometrical parameters of glass pipes or fiber glass during drawing
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    SU1257511A1|1986-09-15|Inclined ultrasonic transducer
    SU544908A1|1977-01-30|Reference to ultrasonic flaw detector
    JP2667684B2|1997-10-27|Focus transducer
    SU842506A2|1981-06-30|Photoelectric device for flaw detection
    JPS61245055A|1986-10-31|Ultrasonic flaw inspecting device
    同族专利:
    公开号 | 公开日
    DE2461590A1|1975-07-10|
    NL7416832A|1975-06-30|
    CA1009359A|1977-04-26|
    SU660606A3|1979-04-30|
    US3916675A|1975-11-04|
    SE7416268L|1975-06-27|
    SE404845B|1978-10-30|
    PL104062B1|1979-07-31|
    BE823664A|1975-04-16|
    FR2256617B1|1980-03-21|
    FR2256617A1|1975-07-25|
    JPS51135589A|1976-11-24|
    DE2461590C2|1986-08-21|
    SE7807113L|1978-06-21|
    IT1027183B|1978-11-20|
    GB1495536A|1977-12-21|
    LU71543A1|1975-06-17|
    JPS5843693B2|1983-09-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    SU142467A1|1961-01-16|1961-11-30|Я.Ф. Аникеев|Ultrasonic Immersion Flaw Detector|
    CH468009A|1963-09-10|1969-01-31|Kredit Und Anlage Ag|Device for ultrasonic material testing of bodies with curved surfaces|FR2337589B1|1976-01-06|1979-07-06|Commissariat Energie Atomique|
    FR2359420B1|1976-07-21|1978-12-15|Commissariat Energie Atomique|
    US4195530A|1978-08-14|1980-04-01|Republic Steel Corporation|Ultrasonic inspection|
    USRE30926F1|1978-08-14|1984-09-18|Ultrasonic inspection|
    DE3003349A1|1980-01-31|1981-08-06|Ruhrchemie Ag, 4200 Oberhausen|METHOD FOR DETECTING MATERIAL ERRORS IN HOLLOW BODIES|
    WO1981002636A1|1980-03-03|1981-09-17|Republic Steel Corp|Ultrasonic inspection|
    JPH0329783Y2|1983-07-29|1991-06-25|
    JPS6040022U|1983-08-20|1985-03-20|
    JPS6044220U|1983-08-31|1985-03-28|
    JPS6070922U|1983-10-19|1985-05-20|
    JPS60124030A|1983-12-08|1985-07-02|Pioneer Electronic Corp|Double deck|
    US4836329A|1987-07-21|1989-06-06|Hughes Aircraft Company|Loudspeaker system with wide dispersion baffle|
    DE4421847C2|1994-06-23|1996-06-27|Fraunhofer Ges Forschung|Device for measuring irregularities in the inner walls of containers with ultrasound|
    US5784468A|1996-10-07|1998-07-21|Srs Labs, Inc.|Spatial enhancement speaker systems and methods for spatially enhanced sound reproduction|
    DE10034474C1|2000-07-15|2001-10-11|Flexim Flexible Industriemeste|Liquid or gas characteristics measuring method using ultrasound has conical wavefront directed through pipe with detection of waves after propagation through the liquid or gas|
    US7410464B2|2002-06-04|2008-08-12|Moshe Ein-Gal|Wave generating device|
    CN110441390B|2019-07-18|2021-12-07|上海大学|Damage positioning method based on cross array and space-wave number filter|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7346384A|FR2256617B1|1973-12-26|1973-12-26|
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