公开(公告)号：US5963882A

公开(公告)日：1999-10-05

申请号：US727691

申请日：1996-10-08

申请人： John R. M. Viertl ,  Elizabeth L. Dixon ,  Mederic E. Auger

发明人： John R. M. Viertl ,  Elizabeth L. Dixon ,  Mederic E. Auger

IPC分类号： G01N29/265 ,  G01N29/34 ,  G01N29/36 ,  G01N29/48 ,  G01N29/00

CPC分类号： G01N29/48 ,  G01N29/265 ,  G01N29/34 ,  G01N29/36 ,  G01N2291/044 ,  G01N2291/2693

摘要： A configuration flexible computer-controlled ultrasonic diagnostic test equipment arrangement for examining large turbine rotors incorporates improved ultrasonic signal "pulser-receiver" circuitry that is used to drive one or more an ultrasonic transducers and to receive and amplify ultrasonic returns from a specimen under test. The improved pulser-receiver circuitry comprises both an ultrasonic pulse generating circuit and an associated ultrasonic return signal linear amplification circuit. The pulse generating circuitry and the ultrasonic return signal amplification circuitry are modular and functionally independent of each other and, consequently, may be used together in the testing system or as stand-alone instrumentation. Overall ultrasonic diagnostic system flexibility is significantly enhanced by providing improved pulser-receiver circuitry with digitally driveable computer control inputs in addition to manual controls to enable selecting initial parameters and transducer position settings. A menu-driven display machine-operator interface is also provided as a user-friendly and efficient means for setting and accessing system configuration information and test data.

摘要翻译： 用于检查大型涡轮转子的配置灵活的计算机控制的超声波诊断测试设备装置结合了改进的超声波信号“脉冲发生器 - 接收器”电路，其用于驱动一个或多个超声波换能器并且从被测试样本接收和放大超声波返回。 改进的脉冲发生器 - 接收器电路包括超声波脉冲发生电路和相关联的超声波返回信号线性放大电路。 脉冲发生电路和超声波返回信号放大电路在模块化和功能上彼此独立，因此可以在测试系统中或作为独立仪器一起使用。 通过提供改进的脉冲发生器接收器电路，除了手动控制以提供选择初始参数和换能器位置设置之外，通过提供数字可驱动的计算机控制输入可以显着提高整体超声诊断系统的灵活性。 还提供了菜单驱动的显示机操作者界面，作为设置和访问系统配置信息和测试数据的用户友好且有效的手段。

公开(公告)号：US07480363B2

公开(公告)日：2009-01-20

申请号：US11108498

申请日：2005-04-18

申请人： Brian W. Lasiuk ,  Thomas J. Batzinger ,  Manoharan Venugopal ,  Elizabeth L. Dixon ,  Michael R. Hopple ,  Nityanand Gopalika ,  Sivaramanivas Ramaswamy ,  Debasish Mishra ,  Rajashekar Venkatachalam ,  Vamishi Krishna Reddy Kommareddy

发明人： Brian W. Lasiuk ,  Thomas J. Batzinger ,  Manoharan Venugopal ,  Elizabeth L. Dixon ,  Michael R. Hopple ,  Nityanand Gopalika ,  Sivaramanivas Ramaswamy ,  Debasish Mishra ,  Rajashekar Venkatachalam ,  Vamishi Krishna Reddy Kommareddy

IPC分类号： G01B15/02

CPC分类号： G01B15/025

摘要： A digital radiography imaging system for acquiring digital images of an object, and a method for transforming digital images into an absolute thickness map characterizing the object under inspection. The system includes a radiation source for directing radiation through a desired region of the object, and a radiation detector having a plurality of sensing elements for detecting radiation passing through the object. Numerical data generated from each sensing element is calibrated, for example by correcting for variations in radiation paths between the source and detector, by correcting for variations in the spatial frequency response (MTF) of the detector, by correcting for variations in the geometric profile of the object under inspection, and by correcting for material contained in and/or around the object. The calibrated data is processed in order to generate and display an absolute thickness map of the object. The calibration procedures are adapted for extracting a thickness map from both isotope sources and X-ray tube sources.

摘要翻译： 一种用于获取对象的数字图像的数字放射线照相成像系统，以及将数字图像转换为表征检查对象的绝对厚度图的方法。 该系统包括用于引导辐射通过物体的期望区域的辐射源，以及具有用于检测通过物体的辐射的多个感测元件的辐射检测器。 通过校正检测器的空间频率响应（MTF）的变化，通过校正各个感测元件的几何轮廓的变化来校正每个感测元件产生的数值数据，例如通过校正源和检测器之间的辐射路径的变化 被检查物体，以及通过校正物体中和/或周围的物质。 对校准后的数据进行处理，以生成和显示对象的绝对厚度图。 校准程序适用于从同位素源和X射线管源提取厚度图。

公开(公告)号：US5445029A

公开(公告)日：1995-08-29

申请号：US149208

申请日：1993-11-08

申请人： Robert V. Falsetti ,  Elizabeth L. Dixon

发明人： Robert V. Falsetti ,  Elizabeth L. Dixon

IPC分类号： G01N29/265 ,  G01N29/30 ,  G01N29/44 ,  G01N29/04

CPC分类号： G01N29/4436 ,  G01N29/2487 ,  G01N29/265 ,  G01N29/30 ,  G01N2291/011 ,  G01N2291/015 ,  G01N2291/048 ,  G01N2291/056 ,  G01N2291/102 ,  G01N2291/2632

摘要： A method and apparatus for the ultrasonic inspection of acoustically "noisy" specimens, such as those having intrinsically coarse grain structure (e.g., turbine rotor parts made of superalloy compositions) employs several types of ultrasonic diagnostic measurement techniques, including at least: "Pitch-Catch" analysis and "Pulse-Echo Axial Long-Wave" analysis. When a Pitch-Catch technique is utilized, a "through-transmitted" sound wave is acquired for each specimen tested and used as a calibration standard to normalize ultrasonic inspection test data for that specimen prior to any automated defect/flaw detection and sizing processing. The through transmitted sound wave is also used to equate the amplitude of "indications" (i.e., significant detected ultrasonic reflections) to that of a standardized theoretical reflector of known size (e.g., an equivalent "flat bottom hole" or EFBH reflector) so that the test sensitivity or "size of indications" can be uniquely determined for each specimen on which the test is performed. When a Pulse-Echo technique is utilized, a through-transmitted sound wave is not used (since this technique employs only a single transducer) and inspection data is instead normalized by a "back wall" reflection signal. Once ultrasonic inspection test data is obtained and digitized, a "rolling average" of the data is used to estimate the localized noise level within the material under test. For every transducer pulse data point obtained, a unique signal-to-noise (S/N) ratio is computed. Variations in S/N ratio for the material are measured at each axial slice of material volume inspected. A function of the standard deviation of the S/N values is then used to automatically adjust a detection amplitude threshold to optimize the flaw detection process and minimize false alarms.

摘要翻译： 用于超音速检测声学“噪声”样本的方法和装置，例如具有本质上粗粒结构的样品（例如，由超级合金组合物制成的涡轮转子部件），采用几种类型的超声波诊断测量技术，其至少包括： 捕捉“分析和”脉冲回波轴向长波“分析。 当采用间距捕捉技术时，对于所测试的每个样本，获取“透射”声波，并将其用作校准标准，以在任何自动缺陷/缺陷检测和尺寸调整处理之前规范该样本的超声检查测试数据。 通过透射的声波也用于将已知尺寸的标准化理论反射器（例如，相当的“平底孔”或EFBH反射器）的“指示”（即，显着检测到的超声波反射）的幅度等同于使得 对于执行测试的每个样本，可以唯一确定测试灵敏度或“指示大小”。 当使用脉冲回波技术时，不使用透射声波（因为该技术仅使用单个换能器），而是通过“后壁”反射信号对检查数据进行归一化。 一旦超声检查测试数据获得并数字化，则使用数据的“滚动平均值”来估计被测材料内的局部噪声水平。 对于获得的每个换能器脉冲数据点，计算独特的信噪比（S / N）比。 在材料的每个轴向切片上测量材料的S / N比的变化。 然后使用S / N值的标准偏差的函数来自动调整检测振幅阈值，以优化缺陷检测过程并使误报最小化。