公开(公告)号：US5119678A

公开(公告)日：1992-06-09

申请号：US456992

申请日：1989-12-26

申请人： Manohar Bashyam ,  David C. Copley

发明人： Manohar Bashyam ,  David C. Copley

IPC分类号： G01B17/02 ,  G01N29/04 ,  G01N29/06 ,  G01N29/30 ,  G01N29/32 ,  G01N29/40

CPC分类号： G01N29/40 ,  G01B17/02 ,  G01N29/0609 ,  G01N29/0645 ,  G01N29/30 ,  G01N29/32 ,  G01N2291/015 ,  G01N2291/02854 ,  G01N2291/048 ,  G01N2291/102 ,  G01N2291/269

摘要： A method for locating and identifying defects in a variable geometry workpiece using first and second transceivers positioned of a preselected distance apart adjacent opposite surfaces of the workpiece and aligned to direct ultrasonic signals toward each other through the workpiece. An ultrasound signal is transmitted from each transceiver toward the workpiece. Signal reflections from each adjacent workpiece surface are detected and used to compute workpiece thickness. Signals from one transceiver are detected at the other transceiver and their intensity determined. The signal intensity is normalized in proportion to the obtained workpiece thickness to establish a signal intensity independent of workpiece thickness. In one form, at least three signal processing paths, each having a different preselected gain, provide three signals of different amplified intensities for each measurement point. The one of the signals having the greatest amplitude not exceeding an established maximum processable signal intensity is selected and the actual intensity of the signal passing through the workpiece is computed by correlating the amplitude of the selected one of the three signals with the gain of the channel from which the signal is selected. A signal intensity corresponding to the actual intensity is displayed on an intensity responsive display for each measurement point after the actual intensity is adjusted for workpiece thickness.

摘要翻译： 一种用于使用第一和第二收发器来定位和识别可变几何工件中的缺陷的方法，所述第一和第二收发器定位在工件的相邻相对表面之间的预选距离处，并且对齐以将超声波信号通过工件彼此引导。 从每个收发器向工件发送超声信号。 检测来自每个相邻工件表面的信号反射并用于计算工件厚度。 在另一个收发器处检测来自一个收发器的信号，并确定它们的强度。 信号强度与获得的工件厚度成正比，以建立独立于工件厚度的信号强度。 在一种形式中，每个具有不同预选增益的至少三个信号处理路径为每个测量点提供不同放大强度的三个信号。 选择具有最大幅度的信号幅度不超过建立的最大可处理信号强度的信号之一，并且通过将三个信号中所选择的一个信号的幅度与信道的增益相关联来计算通过工件的信号的实际强度 从中选择信号。 在对工件厚度进行实际强度调整后，在每个测量点的强度响应显示上显示对应于实际强度的信号强度。

公开(公告)号：US5343750A

公开(公告)日：1994-09-06

申请号：US797020

申请日：1991-11-25

申请人： Manohar Bashyam

发明人： Manohar Bashyam

IPC分类号： G01N29/22 ,  G01N29/265 ,  G01N29/26

CPC分类号： G01N29/265 ,  G01N29/0645 ,  G01N29/221 ,  G01N2291/101 ,  G01N2291/2638

摘要： A light weight hand held ultrasonic scanner for ultrasonic flaw detection systems utilizes an omnidirectional rolling ball element which drive optical encoders for X-Y coordinate position location of flaws. The rolling ball element is mounted in a body for rolling contact with a surface to be inspected. An ultrasonic transducer is mounted at one end of a second hollow body attached to the first body. An ultrasound reflector is provided in the hollow body to reflect an ultrasound beam transversely out of the second body.

摘要翻译： 用于超声波探伤系统的重量轻的手持式超声波扫描仪利用一种全方向的滚动滚珠元件，其驱动光学编码器用于瑕疵的X-Y坐标位置位置。 滚动滚珠元件安装在与要检查的表面滚动接触的主体中。 超声换能器安装在附接到第一主体的第二中空体的一端。 超声波反射器设置在中空体中以将超声波束横向地从第二主体反射出来。

公开(公告)号：US5203869A

公开(公告)日：1993-04-20

申请号：US800909

申请日：1991-11-26

申请人： Manohar Bashyam

发明人： Manohar Bashyam

IPC分类号： G01N29/22

CPC分类号： G01N29/221 ,  G01N29/0645 ,  G01N2291/02854

摘要： A transducer device for an ultrasonic flaw detection system comprises a right angle rectangular block with one longitudinal edge being shaped to accurately conform to the curvature of the surface to be inspected. An ultrasonic sound wave beam in the block is reflected 90.degree. by a rotating mirror to cut a 360.degree. arc path through the surface to be inspected.

摘要翻译： 一种用于超声波探伤系统的换能器装置，包括一个直角矩形块，其一个纵向边缘成形为精确地符合待检测表面的曲率。 块体内的超声波波用反射镜反射90°，通过待检测的表面切割360°弧光路径。

公开(公告)号：US5773721A

公开(公告)日：1998-06-30

申请号：US690654

申请日：1996-07-31

申请人： Manohar Bashyam

发明人： Manohar Bashyam

IPC分类号： G01B17/06 ,  G01D5/32

CPC分类号： G01B17/06 ,  Y10S73/01

摘要： An apparatus for aiming an ultrasonic beam to nondestructively test an object has an ultrasonic transducer for generating the ultrasonic beam having a beam axis and impinging the ultrasonic beam upon the object. The apparatus includes a laser aiming apparatus for directing at least one laser beam having a laser sight line substantially coaxial with the ultrasonic beam axis. The laser aiming apparatus, in one embodiment of the invention, includes a cross-hair apparatus for generating a laser beam cross-hair having a center along the laser sight line. Another embodiment of the present invention provides an ultrasonic mirror apparatus for bending the ultrasonic beam and which has a mirror made of a material that is substantially transparent to the laser beam. A mounting apparatus is used for initially directing a single laser beam and the ultrasonic beam along two different co-planar axes on opposite sides of the mirror and to set the mirror to bend the ultrasonic beam and align its axis with the laser beam axis so that the laser beam and ultrasonic beam axes are substantially coaxial at the object.

摘要翻译： 用于瞄准超声波束对物体进行非破坏性测试的装置具有超声换能器，用于产生具有束轴的超声波束并将超声波束撞击在物体上。 该装置包括用于引导具有与超声波束轴基本上同轴的激光瞄准线的至少一个激光束的激光瞄准装置。 在本发明的一个实施例中，激光瞄准装置包括用于产生具有沿着激光瞄准线的中心的激光束十字线的十字头装置。 本发明的另一实施例提供了一种用于弯曲超声波束的超声镜装置，并且具有由对激光束基本上透明的材料制成的反射镜。 安装装置用于首先将单个激光束和超声波束沿着反射镜的相对侧上的两个不同的共面轴线引导，并且设置反射镜来弯曲超声波束并使其轴线与激光束轴对准，使得 激光束和超声波束轴在物体处基本上同轴。

公开(公告)号：US5987991A

公开(公告)日：1999-11-23

申请号：US2499

申请日：1998-01-02

申请人： Richard L. Trantow ,  Manohar Bashyam

发明人： Richard L. Trantow ,  Manohar Bashyam

IPC分类号： G01N29/24 ,  G01N29/265 ,  G01N29/10 ,  G01N29/26

CPC分类号： G01N29/265 ,  G01N29/2418 ,  G01N2291/0423 ,  G01N2291/0425 ,  G01N2291/044

摘要： A method of non-destructively evaluating or validating a processed area of an object such as a metallic laser shock peened surface by determining Rayleigh wave angles at various positions on the surface. The Rayleigh wave angle is determined by: (a) directing incident beams of ultrasonic waves onto at least one point of a surface at a plurality of incident angles; (b) simultaneously measuring intensity of a combination of corresponding directly reflected and re-radiated beams at a plurality of corresponding reflected angles equal in magnitude to the incident angles with respect to a line normal to the surface; (c) generating a null angle profile of data indicating intensity versus corresponding incident angles from measured intensities in step (b); (d) determining an intensity curve by applying a polynomial curve fit to a low intensity portion of the null angle profile; and (e) determining the effective critical angle for the corresponding Rayleigh wave by determining a substantially minimum point on the curve. The polynomial curve fit may be a second order polynomial fit and the plurality of incident angles and corresponding reflected angles are predetermined and in close proximity to a predetermined critical angle.

摘要翻译： 通过确定表面上各个位置处的瑞利波角度来非破坏性地评估或验证诸如金属激光冲击硬化表面的物体的处理区域的方法。 瑞利波角通过以下方式确定：（a）以多个入射角将超声波的入射光束引导到表面的至少一个点; （b）同时测量相对于垂直于该表面的线的入射角相等于大小的多个对应反射角的相应的直接反射和再辐射光束的组合的强度; （c）在步骤（b）中产生指示强度对来自测量的强度的对应入射角的数据的零角分布; （d）通过对零角度剖面的低强度部分应用多项式曲线拟合强度曲线; 和（e）通过确定曲线上的基本最小点来确定对应的瑞利波的有效临界角。 多项式曲线拟合可以是二次多项式拟合，并且多个入射角和对应的反射角是预定的并且接近预定的临界角。