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    • 4. 发明申请
    • Air-Coupled Acoustic Thermography for In-Situ Evaluation
    • 用于现场评估的空气耦合声学热成像
    • US20100019153A1
    • 2010-01-28
    • US12178173
    • 2008-07-23
    • Joseph N. ZalamedaWilliam P. WinfreeWilliam T. Yost
    • Joseph N. ZalamedaWilliam P. WinfreeWilliam T. Yost
    • G01J5/02G01N29/00
    • G01N29/228G01N25/72G01N29/343
    • Acoustic thermography uses a housing configured for thermal, acoustic and infrared radiation shielding. For in-situ applications, the housing has an open side adapted to be sealingly coupled to a surface region of a structure such that an enclosed chamber filled with air is defined. One or more acoustic sources are positioned to direct acoustic waves through the air in the enclosed chamber and towards the surface region. To activate and control each acoustic source, a pulsed signal is applied thereto. An infrared imager focused on the surface region detects a thermal image of the surface region. A data capture device records the thermal image in synchronicity with each pulse of the pulsed signal such that a time series of thermal images is generated. For enhanced sensitivity and/or repeatability, sound and/or vibrations at the surface region can be used in feedback control of the pulsed signal applied to the acoustic sources.
    • 声学热成像使用的外壳配置为热,声和红外辐射屏蔽。 对于现场应用,壳体具有适于密封地联接到结构的表面区域的开口侧,使得限定了充满空气的封闭室。 定位一个或多个声源以将声波引导通过封闭室中的空气并朝向表面区域。 为了激活和控制每个声源,向其施加脉冲信号。 聚焦在表面区域的红外成像器检测表面区域的热图像。 数据采集​​装置与脉冲信号的每个脉冲同步地记录热图像,从而产生时间序列的热图像。 为了提高灵敏度和/或可重复性,表面区域的声音和/或振动可以用于施加到声源的脉冲信号的反馈控制。
    • 6. 发明授权
    • Air-coupled acoustic thermography for in-situ evaluation
    • 空气耦合声学热成像进行原位评估
    • US07855368B2
    • 2010-12-21
    • US12178173
    • 2008-07-23
    • Joseph N. ZalamedaWilliam P. WinfreeWilliam T. Yost
    • Joseph N. ZalamedaWilliam P. WinfreeWilliam T. Yost
    • G01J5/02
    • G01N29/228G01N25/72G01N29/343
    • Acoustic thermography uses a housing configured for thermal, acoustic and infrared radiation shielding. For in-situ applications, the housing has an open side adapted to be sealingly coupled to a surface region of a structure such that an enclosed chamber filled with air is defined. One or more acoustic sources are positioned to direct acoustic waves through the air in the enclosed chamber and towards the surface region. To activate and control each acoustic source, a pulsed signal is applied thereto. An infrared imager focused on the surface region detects a thermal image of the surface region. A data capture device records the thermal image in synchronicity with each pulse of the pulsed signal such that a time series of thermal images is generated. For enhanced sensitivity and/or repeatability, sound and/or vibrations at the surface region can be used in feedback control of the pulsed signal applied to the acoustic sources.
    • 声学热成像使用的外壳配置为热,声和红外辐射屏蔽。 对于现场应用,壳体具有适于密封地联接到结构的表面区域的开口侧,使得限定了充满空气的封闭室。 定位一个或多个声源以将声波引导通过封闭室中的空气并朝向表面区域。 为了激活和控制每个声源,向其施加脉冲信号。 聚焦在表面区域的红外成像器检测表面区域的热图像。 数据采集​​装置与脉冲信号的每个脉冲同步地记录热图像,从而产生时间序列的热图像。 为了提高灵敏度和/或可重复性,表面区域的声音和/或振动可以用于施加到声源的脉冲信号的反馈控制。
    • 7. 发明授权
    • Synchronized electronic shutter system and method for thermal nondestructive evaluation
    • 同步电子快门系统和热无损评估方法
    • US06712502B2
    • 2004-03-30
    • US10120225
    • 2002-04-10
    • Joseph N. ZalamedaWilliam P. Winfree
    • Joseph N. ZalamedaWilliam P. Winfree
    • G01N2572
    • G01J5/62G01J2005/0077G01N25/72
    • The invention is a synchronized electronic shutter system (SESS) and method for same side and through transmission thermal analysis and inspection of a material for finding defects, corrosion, disbond defects, integrity of a weld and determination of paint thickness. The system comprises an infrared detector that acquires background images of the sample. A shutter then covers the detector and lamps rapidly heat the sample above ambient temperature. Shutters cover all lamps at the same time the shutter over the infrared detector is opened. The infrared detector acquires a series of temperature images over time radiated from the sample as the sample cools down. After collecting a series of temperature images taken by the SESS, a processed image is developed using one of the group comprising time derivative calculation, temperature normalization data reduction routine, thermal diffusivity curve fitting and averaging the series of temperature images.
    • 本发明是同步电子快门系统(SESS)和方法,用于相同侧面和透射热分析和检查用于发现缺陷,腐蚀,剥离缺陷,焊接完整性和油漆厚度确定的材料。 该系统包括获取样本的背景图像的红外检测器。 然后快门覆盖检测器,灯将样品快速加热到环境温度以上。 百叶窗同时覆盖所有灯泡,同时打开红外探测器上的快门。 当样品冷却时,红外检测器从样品中随时间获取一系列温度图像。 在收集SESS拍摄的一系列温度图像后,使用时间导数计算,温度归一化数据缩减程序,热扩散曲线拟合和对一系列温度图像进行平均的组中的一个进行处理。
    • 8. 发明授权
    • Method and apparatus for the portable identification of material
thickness and defects using spatially controlled heat application
    • 使用空间控制的热应用便携式识别材料厚度和缺陷的方法和装置
    • US06000844A
    • 1999-12-14
    • US810058
    • 1997-03-04
    • K. Elliott CramerWilliam P. Winfree
    • K. Elliott CramerWilliam P. Winfree
    • G01N25/72
    • G01N25/72
    • A method and a portable apparatus for the nondestructive identification of defects in structures. The apparatus comprises a heat source (20) and a thermal imager (30) that move at a constant speed past a test surface (10) of a structure. The thermal imager (30) is off set at a predetermined distance from the heat source (10). The heat source (10) induces a constant surface temperature. The imager (20) follows the heat source (10) and produces a video image of the thermal characteristics of the test surface. Material defects produce deviations from the constant surface temperature that move at the inverse of the constant speed. Thermal noise produces deviations that move at random speed. Computer averaging of the digitized thermal image data with respect to the constant speed minimizes noise and improves the signal of valid defects. The motion of thermographic equipment coupled with the high signal to noise ratio render it suitable for portable, on site analysis.
    • 一种用于非破坏性识别结构缺陷的方法和便携式设备。 该装置包括以恒定速度移动经过结构的测试表面(10)的热源(20)和热像仪(30)。 热成像仪(30)被设定在离热源(10)预定距离处。 热源(10)引起恒定的表面温度。 成像器(20)跟随热源(10)并产生测试表面的热特性的视频图像。 材料缺陷产生与恒定速度相反移动的恒定表面温度的偏差。 热噪声产生以随机速度移动的偏差。 相对于恒定速度的数字化热图像数据的计算机平均使噪声最小化并改善有效缺陷的信号。 热成像设备的运动与高信噪比相结合,使其适用于便携式现场分析。
    • 9. 发明授权
    • Structures from low dielectric polyimides
    • 低介电聚酰亚胺的结构
    • US5338826A
    • 1994-08-16
    • US954108
    • 1992-09-28
    • Anne K. St. ClairTerry L. St. ClairWilliam P. Winfree
    • Anne K. St. ClairTerry L. St. ClairWilliam P. Winfree
    • C08G73/10B05D5/06B32B27/00
    • C08G73/1007Y10T428/31681Y10T428/31721
    • A structure which is effective as an electrical insulator or as a transmitter-receiver of electromagnetic energy is prepared by providing a suitable substrate and covering the substrate with an adhering layer of a low dielectric, high temperature, linear aromatic polyimide. This polyimide is prepared by:(1) selecting aromatic diamine and aromatic dianhydride reactants to meet at least two of the following three conditions:(a) a reactant must have minimal permanent or inducible electrical dipolar characteristics as a result of the presence of pendant or bridging groups therein;(b) a reactant must impart a high degree of free volume to the polymer caused by inefficient chain packing therein in the solid state as a result of the presence of pendant or bridging groups therein; and(c) a reactant must have fluorine atoms chemically attached thereto; and(2) chemically combining equimolar quantities of the aromatic diamine and aromatic dianhydride reactants in a solvent to form a high molecular weight polyamic acid solution, and converting the high molecular weight polyamic acid to the corresponding low dielectric, high temperature linear aromatic polyimide.
    • 作为电绝缘体或作为电磁能的发射器 - 接收器有效的结构通过提供合适的衬底并用低电介质,高温线性芳族聚酰亚胺的粘附层覆盖衬底来制备。 该聚酰亚胺通过以下方法制备:(1)选择芳族二胺和芳族二酐反应物以满足以下三个条件中的至少两个:(a)反应物必须具有最小的永久或可诱导的电偶极特性,这是由于存在侧基或 桥接基团; (b)由于在其中存在侧基或桥连基团,反应物必须赋予聚合物在固态中由于无效的链填料而导致的高度的自由体积; 和(c)反应物必须具有化学连接的氟原子; 和(2)将等摩尔量的芳族二胺和芳族二酐反应物在溶剂中化学组合以形成高分子量聚酰胺酸溶液,并将高分子量聚酰胺酸转化为相应的低电介质,高温线性芳族聚酰亚胺。