公开(公告)号：US06517236B2

公开(公告)日：2003-02-11

申请号：US09784597

申请日：2001-02-15

申请人： Jiangang Sun ,  William A. Ellingson ,  Chris M. Deemer

发明人： Jiangang Sun ,  William A. Ellingson ,  Chris M. Deemer

IPC分类号： G01N2572

CPC分类号： G01N25/72

摘要： A method and apparatus are provided for automated non-destructive evaluation (NDE) thermal imaging tests of combustor liners and other products. The apparatus for automated NDE thermal imaging testing of a sample includes a flash lamp positioned at a first side of the sample. An infrared camera is positioned near a second side of the sample. A linear positioning system supports the sample. A data acquisition and processing computer is coupled to the flash lamp for triggering the flash lamp. The data acquisition and processing computer is coupled to the infrared camera for acquiring and processing image data. The data acquisition and processing computer is coupled to the linear positioning system for positioning the sample for sequentially acquiring image data.

公开(公告)号：US06285449B1

公开(公告)日：2001-09-04

申请号：US09330727

申请日：1999-06-11

申请人： William A. Ellingson ,  Judith A. Todd ,  Jiangang Sun

发明人： William A. Ellingson ,  Judith A. Todd ,  Jiangang Sun

IPC分类号： G01N2100

CPC分类号： G01N21/8851 ,  G01N21/8422 ,  G01N21/95

摘要： Apparatus detects defects and microstructural changes in hard translucent materials such as ceramic bulk compositions and ceramic coatings such as after use under load conditions. The beam from a tunable laser is directed onto the sample under study and light reflected by the sample is directed to two detectors, with light scattered with a small scatter angle directed to a first detector and light scattered with a larger scatter angle directed to a second detector for monitoring the scattering surface. The sum and ratio of the two detector outputs respectively provide a gray-scale, or “sum” image, and an indication of the lateral spread of the subsurface scatter, or “ratio” image. This two detector system allows for very high speed crack detection for on-line, real-time inspection of damage in ceramic components. Statistical image processing using a digital image processing approach allows for the quantative discrimination of the presence and distribution of small flaws in a sample while improving detection reliability. The tunable laser allows for the penetration of the sample to detect defects from the sample's surface to the laser's maximum depth of penetration. A layered optical fiber directs the incoming laser beam to the sample and transmits each scattered signal to a respective one of the two detectors.

摘要翻译： 设备检测硬质半透明材料如陶瓷本体组合物和陶瓷涂层（例如在负载条件下使用后）的缺陷和微结构变化。 来自可调谐激光器的光束被引导到研究中的样品上，并且由样品反射的光被引导到两个检测器，其中散射的光以相对于第一检测器的小的散射角散射，并且以更大的散射角散射的光被引导到第二检测器 用于监测散射表面的检测器。 两个检测器输出的总和和比率分别提供灰度或“和”图像，以及地下散射或“比率”图像的横向扩展的指示。 这种两个检测器系统允许非常高速的裂纹检测在线，实时检测陶瓷部件的损坏。 使用数字图像处理方法的统计图像处理允许在提高检测可靠性的同时对样本中小缺陷的存在和分布进行定量鉴别。 可调谐激光器允许样品的穿透以检测从样品表面到激光器的最大穿透深度的缺陷。 分层光纤将输入的激光束引导到样本，并将每个散射信号发送到两个检测器中的相应的一个。

公开(公告)号：US5689332A

公开(公告)日：1997-11-18

申请号：US713833

申请日：1996-09-13

申请人： William A. Ellingson ,  Jiangang Sun

发明人： William A. Ellingson ,  Jiangang Sun

IPC分类号： G01N21/952 ,  G01N21/00 ,  G01J4/00

CPC分类号： G01N21/952

摘要： Apparatus for the automated real-time detection and classification of defects during the machining of ceramic components employs an elastic optical scattering technique using polarized laser light. A ceramic specimen is continuously moved while being machined. Polarized laser light is directed onto the ceramic specimen surface at a fixed position just aft of the machining tool for examination of the newly machined surface. Any foreign material near the location of the laser light on the ceramic specimen is cleared by an air blast. As the specimen is moved, its surface is continuously scanned by the polarized laser light beam to provide a two-dimensional image presented in real-time on a video display unit, with the motion of the ceramic specimen synchronized with the data acquisition speed. By storing known "feature masks" representing various surface and sub-surface defects and comparing measured defects with the stored feature masks, detected defects may be automatically characterized. Using multiple detectors, various types of defects may be detected and classified.

摘要翻译： 用于在陶瓷部件加工期间自动实时检测和分类缺陷的装置采用使用偏振激光的弹性光散射技术。 陶瓷样品在加工时连续移动。 极化激光在加工工具的后方的固定位置被引导到陶瓷样品表面上，用于检查新加工的表面。 在陶瓷样品上的激光位置附近的任何异物都被鼓风清除。 当样品移动时，其表面被偏振激光束连续扫描，以提供在视频显示单元上实时呈现的二维图像，陶瓷样品的运动与数据采集速度同步。 通过存储表示各种表面和子表面缺陷的已知“特征掩模”，并将测量的缺陷与存储的特征掩模进行比较，可以自动表征检测到的缺陷。 使用多个检测器，可以检测和分类各种类型的缺陷。

公开(公告)号：US08465200B2

公开(公告)日：2013-06-18

申请号：US12793829

申请日：2010-06-04

申请人： Jiangang Sun

发明人： Jiangang Sun

IPC分类号： G01N25/18 ,  G06K9/00

CPC分类号： G06K9/2018 ,  G06K9/00201

摘要： A computer-implemented method, apparatus, and computer program product implement enhanced thermal tomography three-dimensional (3D) thermal effusivity imaging. Experimental thermal imaging data is acquired. A response function is derived and a convolution formulation is constructed from the experimental thermal imaging data. A deconvolution solution procedure is implemented that includes constructing a matrix solution equation with a damping parameter, and solving the matrix solution equation with a selected number of iterations to construct a plurality of effusivity images. Using the novel depth deconvolution algorithm with experimental data acquired from a one-sided pulsed thermal-imaging system provides greater sensitivity for internal sample features substantially eliminating degradation in depth resolution.

摘要翻译： 计算机实现的方法，装置和计算机程序产品实现增强的热层析成像三维（3D）热效率成像。 获取实验热成像数据。 导出响应函数，并从实验热成像数据构建卷积公式。 实现了一个去卷积解决程序，包括用阻尼参数构建矩阵求解方程，并以选定的迭代次数求解矩阵求解方程，以构建多个效率图像。 使用从单面脉冲热成像系统获取的实验数据的新颖的深度去卷积算法为内部样本特征提供了更大的灵敏度，从而基本上消除了深度分辨率的降低。

公开(公告)号：US07769201B2

公开(公告)日：2010-08-03

申请号：US11452052

申请日：2006-06-13

申请人： Jiangang Sun

发明人： Jiangang Sun

IPC分类号： G06K9/00

CPC分类号： G01B21/085

摘要： A method, apparatus, and computer program product provides automated analysis of thermal imaging data for multi-layer materials based upon a theoretical model of a multi-layer material system, which is solved numerically. The computer-implemented method effectively processes the volume heating effect for thermal barrier coatings (TBCs), since quantitative evaluation of TBC thickness and conductivity is particularly important. TBC thickness is a processing parameter and required to be monitored. TBC conductivity is a measure of TBC quality because it is directly related with TBC density/porosity, microcracking and interface cracks. Because this method is an imaging technology, it can be used for fast and 100% area inspection of larger TBC surfaces, such as combustor liners.

摘要翻译： 基于数字解决的多层材料系统的理论模型，方法，装置和计算机程序产品提供了多层材料的热成像数据的自动分析。 由于TBC厚度和电导率的定量评估特别重要，计算机实现的方法有效地处理了热障涂层（TBC）的体积加热效应。 TBC厚度是一个处理参数，需要监控。 TBC电导率是TBC质量的量度，因为它与TBC密度/孔隙度，微裂纹和界面裂纹直接相关。 因为这种方法是一种成像技术，它可以用于对较大TBC表面（如燃烧器衬管）进行快速和100％的面积检查。

公开(公告)号：US06542849B2

公开(公告)日：2003-04-01

申请号：US09766214

申请日：2001-01-19

申请人： Jiangang Sun

发明人： Jiangang Sun

IPC分类号： G01B1102

CPC分类号： G01B11/06 ,  G01B11/22

摘要： A method and apparatus are provided for determining the thickness of a sample and defect depth using thermal imaging in a variety of plastic, ceramic, metal and other products. A pair of flash lamps is positioned at a first side of the sample. An infrared camera is positioned near the first side of the sample. A data acquisition and processing computer is coupled to the flash lamps for triggering the flash lamps. The data acquisition and processing computer is coupled to the infrared camera for acquiring and processing thermal image data. The thermal image data are processed using a theoretical solution to analyze the thermal image data to determine the thickness of a sample and defect depth.

公开(公告)号：US20080111078A1

公开(公告)日：2008-05-15

申请号：US11522757

申请日：2006-09-18

申请人： Jiangang Sun

发明人： Jiangang Sun

IPC分类号： G01J5/02

CPC分类号： G01J5/0003 ,  A61B5/015 ,  G01J2005/0077 ,  G01N25/72

摘要： A computer-implemented method for automated thermal computed tomography includes providing an input of heat, for example, with a flash lamp, onto the surface of a sample. The amount of heat and the temperature rise necessary are dependent on the thermal conductivity and the thickness of the sample being inspected. An infrared camera takes a rapid series of thermal images of the surface of the article, at a selected rate, which can vary from 100 to 2000 frames per second. Each infrared frame tracks the thermal energy as it passes from the surface through the material. Once the infrared data is collected, a data acquisition and control computer processes the collected infrared data to form a three-dimensional (3D) thermal effusivity image.

摘要翻译： 用于自动热计算机断层摄影的计算机实现的方法包括将例如闪光灯的热量输入提供到样品的表面上。 所需的热量和温度升高取决于被检查样品的热导率和厚度。 红外摄像机以选定的速率拍摄物品表面的快速一系列热图像，其速率可以在100至2000帧/秒之间变化。 每个红外线框架在表面通过材料时跟踪热能。 一旦收集了红外数据，数据采集和控制计算机处理所收集的红外数据，形成三维（3D）散热效果图像。

公开(公告)号：US20070285766A1

公开(公告)日：2007-12-13

申请号：US11452156

申请日：2006-06-13

申请人： Jiangang Sun

发明人： Jiangang Sun

IPC分类号： F21V9/06

CPC分类号： G02B5/208

摘要： An optical filter made from a borosilicate optical material is provided for flash lamps used in pulsed thermal imaging. The filter substantially eliminates the infrared radiation from flash lamps to allow for accurate detection of surface temperature during entire pulsed thermal imaging tests.

摘要翻译： 由用于脉冲热成像的闪光灯提供由硼硅酸盐光学材料制成的滤光器。 过滤器基本上消除了来自闪光灯的红外辐射，以允许在整个脉冲热成像测试期间精确地检测表面温度。

公开(公告)号：US06517238B2

公开(公告)日：2003-02-11

申请号：US09761732

申请日：2001-01-18

申请人： Jiangang Sun ,  Chris Deemer

发明人： Jiangang Sun ,  Chris Deemer

IPC分类号： G01N2520

CPC分类号： G01N25/72

摘要： A system and method for determining lateral thermal diffusivity of a material sample using a heat pulse; a sample oriented within an orthogonal coordinate system; an infrared camera; and a computer that has a digital frame grabber, and data acquisition and processing software. The mathematical model used within the data processing software is capable of determining the lateral thermal diffusivity of a sample of finite boundaries. The system and method may also be used as a nondestructive method for detecting and locating cracks within the material sample.

公开(公告)号：US20110299752A1

公开(公告)日：2011-12-08

申请号：US12793829

申请日：2010-06-04

申请人： Jiangang Sun

发明人： Jiangang Sun

IPC分类号： G06K9/00 ,  H01L25/00

CPC分类号： G06K9/2018 ,  G06K9/00201

摘要： A computer-implemented method, apparatus, and computer program product implement enhanced thermal tomography three-dimensional (3D) thermal effusivity imaging. Experimental thermal imaging data is acquired. A response function is derived and a convolution formulation is constructed from the experimental thermal imaging data. A deconvolution solution procedure is implemented that includes constructing a matrix solution equation with a damping parameter, and solving the matrix solution equation with a selected number of iterations to construct a plurality of effusivity images. Using the novel depth deconvolution algorithm with experimental data acquired from a one-sided pulsed thermal-imaging system provides greater sensitivity for internal sample features substantially eliminating degradation in depth resolution.

摘要翻译： 计算机实现的方法，装置和计算机程序产品实现增强的热层析成像三维（3D）热效率成像。 获取实验热成像数据。 导出响应函数，并从实验热成像数据构建卷积公式。 实现了一个去卷积解决程序，包括用阻尼参数构建矩阵求解方程，并以选定的迭代次数求解矩阵求解方程，以构建多个效率图像。 使用从单面脉冲热成像系统获取的实验数据的新颖的深度去卷积算法为内部样本特征提供了更大的灵敏度，从而基本上消除了深度分辨率的降低。