公开(公告)号：WO0060337A9

公开(公告)日：2002-06-27

申请号：PCT/US0009175

申请日：2000-04-06

申请人： THERMAL WAVE IMAGING INC

发明人： SHEPARD STEVEN M

IPC分类号： G01N25/18 ,  G01N21/88 ,  G01N25/72 ,  G01N29/04 ,  G01N29/06

CPC分类号： G01N25/72

摘要： An apparatus and an active thermographic method for detecting subsurface defects in a specimen (104), particularly kissing unbond defects, includes heating the specimen, applying a force to the surface (102) of the specimen to shift and separate the walls of a defect, and obtaining thermographic images of the specimen over time to monitor the heat flow through the specimen and detect thermal discontinuities. Because kissing unbond defects normally have good physical contacts, and therefore, good thermal conductivity, between its walls, these defects can go undetected in conventional active thermographic methods. By distorting the surface of the specimen, the kissing unbond defect is enlarged enough to generate sufficient thermal contrast for the defect to appear in the thermographic images.

摘要翻译： 一种用于检测试样（104）中的下表面缺陷的装置和主动热成像方法，特别是接触未结合的缺陷，包括加热试样，向试样的表面（102）施加力以移动和分离缺陷的壁， 并随时间获得样品的热成像图像，以监测通过样品的热流，并检测热不连续性。 因为接触非粘合缺陷通常具有良好的物理接触，因此在其壁之间具有良好的导热性，这些缺陷可能在传统的活性热成像方法中未被发现。 通过扭曲样品的表面，接吻未粘合缺陷被扩大到足以产生足够的热对比度，以使缺陷出现在热敏照相图像中。

公开(公告)号：WO2015042577A1

公开(公告)日：2015-03-26

申请号：PCT/US2014/056973

申请日：2014-09-23

申请人： THERMAL WAVE IMAGING, INC.

发明人： SHEPARD, Steven, M. ,  YOUNG, Timothy ,  BEEMER, Maria, Frendberg

IPC分类号： G01N25/72

CPC分类号： G01J5/0205 ,  G01J5/047 ,  G01J5/0809 ,  G01J5/084 ,  G01J5/0896 ,  G01J2005/0081 ,  G01N25/72

摘要： An assembly including an optically excited infrared nondestructive testing active thermography system (10) is disclosed. The optically excited infrared nondestructive testing active thermography system (10) includes one or more illumination sources (12), at least one first reflector (18), at least one second reflector (20) and a computing resource (16). The at least one first reflector (18) is arranged about the one or more illumination sources (12). The at least one first reflector (18) has a near focal point (FN) and a far focal point (Fp). The one or more illumination sources (12) is/are positioned at least proximate the near focal point (FN) of the at least one first reflector (18). The at least one second reflector (20) is positioned at least proximate the far focal point (FF). The computing resource (16) is communicatively-coupled to a motor (30) that is coupled to the at least one second reflector (20) for manipulating the at least one second reflector (20) between at least: a first spatial orientation and a second spatial orientation. At least one of the first spatial orientation and the second spatial orientation results in the at least one second reflector (20) reflecting light (L) that originates from the one or more illumination sources (12). The light (L) is directed toward the at least one second reflector (20) as a result of the light (L) being directly propagated from the one or more illumination sources (12) and reflected by the at least one first reflector (18). A method is also disclosed.

摘要翻译： 公开了一种包括光学激发的红外非破坏性测试有源热成像系统（10）的组件。 光激发的红外无损检测有源热成像系统（10）包括一个或多个照明源（12），至少一个第一反射器（18），至少一个第二反射器（20）和计算资源（16）。 所述至少一个第一反射器（18）围绕所述一个或多个照明源（12）布置。 至少一个第一反射器（18）具有近焦点（FN）和远焦点（Fp）。 一个或多个照明源（12）至少邻近至少一个第一反射器（18）的近焦点（FN）定位。 至少一个第二反射器（20）至少位于远焦点（FF）附近。 计算资源（16）通信地耦合到耦合到所述至少一个第二反射器（20）的马达（30），用于在至少第一空间取向和第二反射器之间操纵所述至少一个第二反射器（20） 第二空间方向。 第一空间取向和第二空间取向中的至少一个导致反射来自一个或多个照明源（12）的光（L）的至少一个第二反射器（20）。 光（L）由于光（L）从一个或多个照明源（12）直接传播并被至少一个第一反射器（18）反射的结果指向至少一个第二反射器（20） ）。 还公开了一种方法。

公开(公告)号：WO2011156040A2

公开(公告)日：2011-12-15

申请号：PCT/US2011/028886

申请日：2011-03-17

申请人： THERMAL WAVE IMAGING, INC. ,  SHEPARD, Steven, M. ,  LHOTA, James, R. ,  AHMED, Tasdiq ,  CHAUDHRY, Bharat, Bhushan

发明人： SHEPARD, Steven, M. ,  LHOTA, James, R. ,  AHMED, Tasdiq ,  CHAUDHRY, Bharat, Bhushan

IPC分类号： G01K13/00 ,  G01K3/00 ,  G06F15/00

CPC分类号： F01D5/187 ,  F01D5/186 ,  F01D21/003 ,  G01J5/0014 ,  G01J5/0088 ,  G01J2005/0077 ,  G01N25/72 ,  Y02T50/676

摘要： A method of thermal inspection of a component (100) defining at least one internal passageway (110, 120). The method includes receiving a continuous sequence of thermal images (712) of at least an exit hole (122) defined by the at least one internal passageway at a surface (102) of the component. The method also includes delivering a pressurized airflow pulse into the at least one internal passageway, receiving a temperature response signal (1000, 1000a, 1000b, 1000c) as function of time based on the received thermal images, determining a first derivative (1001, 1001a, 1001b, 1005) of the temperature response signal, and determining a level of blockage of the at least one internal passageway based on the first derivative of the temperature response signal.

摘要翻译： 限定至少一个内部通道（110,120）的部件（100）的热检查方法。 该方法包括在部件的表面（102）处接收由至少一个内部通道限定的至少一个出口孔（122）的连续的热图像序列（712）。 该方法还包括将加压气流脉冲输送到至少一个内部通道中，基于所接收的热图像接收作为时间的函数的温度响应信号（1000,1000a，1000b，1000c），确定一阶导数（1001,1001a ，1001b，1005），以及基于所述温度响应信号的一阶导数来确定所述至少一个内部通道的阻塞水平。

公开(公告)号：WO1997032201A1

公开(公告)日：1997-09-04

申请号：PCT/US1997002846

申请日：1997-02-24

申请人： THERMAL WAVE IMAGING, INC.

发明人： THERMAL WAVE IMAGING, INC. ,  SHEPARD, Steven, M.

IPC分类号： G01N25/72

CPC分类号： G01N25/72

摘要： In connection with a method of interpreting thermographic data for nondestructive evaluation of subsurface structural irregularities in a sample object, the sample object is thermally excited and then allowed to cool. As the thermal energy level on the object's surface changes, a series of positionally-fixed infrared images of the object are acquired. The method calculates a pixel sum set for each image in the series by counting the number of pixels in each image which display each of the different pixel shades of grey (or colors). The mathematical moments of each of the functions derived from the pixel sum sets are then calculated, producing a single total energy value for each image, the total energy values collectively being referred to as a total energy value set. The total energy value set acquired from the sample object is compared to a control total energy value set expected from an infinitely thick, perfectly homogenous object to identify anomalous surface infrared radiation patterns, indicating subsurface structural irregularities in the sample object. Alternatively, instead of taking the mathematical moment of the pixel sum sets, the pixel sum sets themselves may be compared individually to a control pixel sum set expected from an infinitely thick, perfectly homogenous object, likewise identifying anomalous surface infrared radiation patterns.

摘要翻译： 关于解释用于对样品物体中的地下结构不规则性进行非破坏性评估的热成像数据的方法，将样品物体热激发，然后使其冷却。 当物体表面的热能水平发生变化时，会获得一系列位置固定的红外图像。 该方法通过对显示灰色（或颜色）的各个不同像素阴影的每个图像中的像素数进行计数来计算该系列中的每个图像的像素和集合。 然后计算从像素和集合导出的每个函数的数学时刻，为每个图像产生单个总能量值，总能量值统称为总能量值集合。 将从样本对象获得的总能量值与从无限厚的完全同质的对象预期的控制总能量值进行比较，以识别异常表面红外辐射图，指示样本对象中的地下结构不规则。 或者，代替采取像素和集合的数学时刻，可以将像素和集合本身单独地与从无限厚的完全同质的对象预期的控制像素和集进行比较，同样识别异常表面红外辐射图案。

公开(公告)号：WO2021262313A2

公开(公告)日：2021-12-30

申请号：PCT/US2021/029458

申请日：2021-04-27

申请人： THERMAL WAVE IMAGING, INC.

发明人： SHEPARD, Steven, M. ,  BEEMER, Maria, Frendberg

IPC分类号： G01N25/72 ,  G01J5/10 ,  G01J5/00

摘要： A method (100, 200) for performing non-destructive testing using active thermography includes applying, using at least one thermal excitation device (14), a first excitation pulse (P1) to a workpiece (W); capturing, using an imaging device (12), a first iso-time frame (22) of the workpiece; and determining a second excitation pulse by modifying one or more of a duration D of the first excitation pulse, an amplitude A of the first excitation pulse, or a spacing W between the first excitation pulse and the second excitation pulse. The method also includes applying, using the at least one of the thermal excitation device, the second excitation pulse to the workpiece; capturing, using the imaging device, a second iso-time frame of the workpiece; and determining a numerical fit of the first iso-time frame and the second iso-time frame.

公开(公告)号：WO2013055956A1

公开(公告)日：2013-04-18

申请号：PCT/US2012/059807

申请日：2012-10-11

申请人： THERMAL WAVE IMAGING, INC

发明人： SHEPARD, Steven, M.

IPC分类号： G01N29/024

CPC分类号： G01N25/72 ,  G01M15/14 ,  G01N19/08

摘要： Systems and methods for detecting a presence of aberrations within a workpiece W having internal walls (24) that define a conduit (C), the conduit (C) having a first end and a second end is disclosed. In an implementation, the system comprises a fluid movement device (12) arranged proximate to said conduit (C) to pass fluid through the conduit (C), a sensor (14) arranged proximate to the fluid movement to detect one or more conditions of the fluid, a workpiece W exciter (16) coupled to the workpiece W for exciting the workpiece W and a detecting device (18, 19) having an input (20, 21) connected to the sensor (14), the detecting device (18, 19) for detecting fluctuations in the one or more conditions of the fluid detected by the sensor (14).

摘要翻译： 公开了一种用于检测具有限定导管（C）的内壁（24）的工件W内存在像差的系统和方法，所述导管（C）具有第一端和第二端。 在一个实施方案中，该系统包括靠近所述导管（C）布置以使流体通过导管（C）的流体移动装置（12），邻近流体运动设置的传感器（14），以检测一个或多个条件 流体，联接到工件W的用于激发工件W的工件W激励器（16）和具有连接到传感器（14）的输入（20,21）的检测装置（18,19），检测装置（18） ，19），用于检测由传感器（14）检测的流体的一个或多个条件的波动。

公开(公告)号：WO2011156040A3

公开(公告)日：2014-03-27

申请号：PCT/US2011028886

申请日：2011-03-17

申请人： THERMAL WAVE IMAGING INC ,  SHEPARD STEVEN M ,  LHOTA JAMES R ,  AHMED TASDIQ ,  CHAUDHRY BHARAT BHUSHAN

发明人： SHEPARD STEVEN M ,  LHOTA JAMES R ,  AHMED TASDIQ ,  CHAUDHRY BHARAT BHUSHAN

IPC分类号： G01K13/02

CPC分类号： F01D5/187 ,  F01D5/186 ,  F01D21/003 ,  G01J5/0014 ,  G01J5/0088 ,  G01J2005/0077 ,  G01N25/72 ,  Y02T50/676

摘要： A method of thermal inspection of a component (100) defining at least one internal passageway (110, 120). The method includes receiving a continuous sequence of thermal images (712) of at least an exit hole (122) defined by the at least one internal passageway at a surface (102) of the component. The method also includes delivering a pressurized airflow pulse into the at least one internal passageway, receiving a temperature response signal (1000, 1000a, 1000b, 1000c) as function of time based on the received thermal images, determining a first derivative (1001, 1001a, 1001b, 1005) of the temperature response signal, and determining a level of blockage of the at least one internal passageway based on the first derivative of the temperature response signal.

摘要翻译： 一种限定至少一个内部通道（110,120）的部件（100）的热检查方法。 该方法包括在部件的表面（102）处接收由至少一个内部通道限定的至少一个出口孔（122）的连续的热图像序列（712）。 该方法还包括将加压气流脉冲输送到至少一个内部通道中，基于所接收的热图像接收作为时间的函数的温度响应信号（1000,1000a，1000b，1000c），确定一阶导数（1001,1001a ，1001b，1005），并且基于温度响应信号的一阶导数来确定至少一个内部通道的阻塞水平。

公开(公告)号：WO0141421A2

公开(公告)日：2001-06-07

申请号：PCT/US0032799

申请日：2000-12-04

申请人： THERMAL WAVE IMAGING INC ,  SHEPARD STEVEN M ,  RUBADEAUX BRUCE A ,  LHOTA JAMES R

发明人： SHEPARD STEVEN M ,  RUBADEAUX BRUCE A ,  LHOTA JAMES R

IPC分类号： H04N7/18 ,  G01N25/72 ,  H04N

CPC分类号： G01N25/72

摘要： A method and system for non-destructive, reference free thermographic detection of sub-surface defects uses an infrared camera to capture images of a sample (204) that has been heated and allow to cool to equilibrium temperature. The temperature-time data obtained for each pixel in each image is converted into the logarithmic domain and at least squares fit is conducted on the data to generate a polynomial expression corresponding to the temperature-time data for a given pixel (212). This polynomial expression can be transformed into the original time domain to obtain temperature time data with improved signal-to-noise characteristics. Defects can be detected by observing the zero-crossing characteristic of the second derivative of the polynomial (214).

摘要翻译： 用于非表面缺陷的非破坏性，无基准热敏成像检测的方法和系统使用红外相机来捕获已被加热并允许冷却到平衡温度的样本（204）的图像。 为每个图像中的每个像素获得的温度 - 时间数据被转换成对数域，并且对数据进行至少二次拟合以产生与给定像素的温度 - 时间数据相对应的多项式表达式（212）。 这个多项式表达式可以被转换到原始时域，以获得具有改善的信噪特性的温度时间数据。 通过观察多项式（214）的二阶导数的零交叉特性可以检测缺陷。

公开(公告)号：WO2002089042A1

公开(公告)日：2002-11-07

申请号：PCT/US2002/011971

申请日：2002-04-15

申请人： THERMAL WAVE IMAGING, INC. ,  SHEPARD, Steven, M.

发明人： SHEPARD, Steven, M.

IPC分类号： G06K9/00

CPC分类号： G06T7/40 ,  G01N25/72 ,  G06T1/0007 ,  G06T7/0004 ,  G06T7/42 ,  G06T2207/10016 ,  G06T2207/10048 ,  G06T2207/30164

摘要： A method and system for non-destructive, reference-free thermographic detection of sub-surface defects uses an infrared camera (106) to capture multiple, spatially different images of a sample (104) that has been heated (102) and allow to cool to equilibrium temperature. The temperature-time data obtained for each pixel in each image is converted into the logarithmic domain (218) and a least squares fit is conducted on the data to generate a polynomial expression corresponding to the temperature-time data for a given pixel.

摘要翻译： 用于非表面缺陷的非破坏性无参考热成像检测的方法和系统使用红外相机（106）捕获已被加热（102）并允许冷却的样品（104）的多个空间不同的图像 到平衡温度。 将每个图像中的每个像素获得的温度 - 时间数据转换成对数域（218），并对数据进行最小二乘拟合，以生成与给定像素的温度 - 时间数据相对应的多项式。