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公开(公告)号：US20150160144A1
公开(公告)日：2015-06-11
申请号：US14626415
申请日：2015-02-19
申请人： Jentek Sensors, Inc.
发明人： Neil J. Goldfine , Vladimir A. Zilberstein , Ian C. Shay , Christopher A. Craven , David C. Grundy , Volker Weiss , Andrew P. Washabaugh
CPC分类号： G01N27/02 , G01N19/00 , G01N25/00 , G01N27/60 , G01N27/72 , G05D23/1931 , G05D23/22 , G05D23/24 , G05D23/26
摘要： The condition of internal or hidden material layers or interfaces is monitored and used for control of a process that changes a condition of a material system. The material system has multiple component materials, such as layers or embedded constituents, or can be represented with multiple layers to model spatial distributions in the material properties. The material condition changes as a result of a process performed on the material, such as by cold working, or from functional operation. Sensors placed proximate to the test material surface or embedded between material layers are used to monitor a material property using magnetic, electric, or thermal interrogation fields. The sensor responses are converted into states of the material condition, such as temperature or residual stress, typically with a precomputed database of sensor responses. The sensor responses can also be used to determine properties of the test material, such as electrical conductivity or magnetic permeability, prior to conversion to the material state. The states are used to support control decisions that control the process or operation causing the material condition to change.
摘要翻译： 监控内部或隐藏的材料层或界面的状况，并用于控制改变材料系统状态的过程。 材料系统具有多种组分材料，例如层或嵌入组分，或者可以用多层来表示材料性质中的空间分布。 材料状态由于通过冷加工或功能操作在材料上进行的过程而改变。 使用放置在测试材料表面附近或嵌入材料层之间的传感器用于使用磁，电或热询问场监测材料特性。 传感器响应被转换为材料状态的状态，例如温度或残余应力，通常具有传感器响应的预计算数据库。 在转换到材料状态之前，传感器响应也可用于确定测试材料的性质，例如导电性或磁导率。 这些状态用于支持控制过程或操作的控制决策，从而导致材料状况发生变化。
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公开(公告)号：US20150145510A1
公开(公告)日：2015-05-28
申请号：US14456567
申请日：2014-08-11
申请人： JENTEK Sensors, Inc.
IPC分类号： G01N27/90
CPC分类号： G01N27/90 , G01N27/9033 , G01R33/1215
摘要： A substantially planar eddy-current sensor having durability enhancing pillars in an active region is provided. The pillars are distributed and sized so as to have limited effect on the sensor's performance. When the sensor is mounted on a component such that the sensor experiences forces on a top and bottom surface, the pillars bear the load reducing the load bore by the active elements (e.g., drive winding, sense elements). A sensor with redundant drive windings and/or redundant sense elements is disclosed. The redundant elements may be connected to separate electronics. Another aspect relates to providing a reference transformer for calibration of a sensor. The secondary windings of the reference transformer are connected in series with the sense elements of the sensor to be calibrated. Transimpedance measurements are made when the drive winding of the reference transformer is excited. The measurements are used to correct transimpedance measurements made when the drive winding of the sensor is excited. A system having an impedance analyzer and a plurality of multiplexing units is disclosed for monitoring a plurality of sensor. Each multiplexing units directs an excitation signal to the drive winding of a respective sensor and returns, serially, the sense element responses back to the impedance analyzer. The system coordinates the excitation of each sensor and return of the sensor response to share a serial network. The multiplexing units may have a reference transformer for calibration of their respective sensors. Optical communication may be used.
摘要翻译： 提供了一种在有源区域中具有耐久性增强柱的基本平面的涡流传感器。 支柱的分布和尺寸是对传感器性能的影响有限的。 当传感器安装在组件上使得传感器在顶部和底部表面上经受力时，支柱承受由有源元件（例如，驱动绕组，感测元件）减小负载孔的负载。 公开了具有冗余驱动绕组和/或冗余感测元件的传感器。 冗余元件可以连接到单独的电子元件。 另一方面涉及提供用于校准传感器的参考变压器。 参考变压器的次级绕组与要校准的传感器的感测元件串联连接。 当参考变压器的驱动绕组被激励时进行跨阻抗测量。 测量用于校正当传感器的驱动绕组被激励时进行的跨阻抗测量。 公开了一种具有阻抗分析器和多个复用单元的系统，用于监视多个传感器。 每个复用单元将激励信号引导到相应传感器的驱动绕组，并将感测元件响应连续返回到阻抗分析器。 系统协调每个传感器的激励并返回传感器响应以共享串行网络。 复用单元可以具有用于校准其各自传感器的参考变压器。 可以使用光通信。
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公开(公告)号：US20220358630A1
公开(公告)日：2022-11-10
申请号：US17662634
申请日：2022-05-09
申请人： JENTEK Sensors, Inc.
摘要： A system and method are disclosed for enhancing pit detection and sizing in a test object. Response signatures are created and stored in a signature library to characterize various sensor responses (liftoff, orientation) and pit properties (e.g., depth, width), possibly with or without additional considerations (e.g., edges, cracks). A sensor is placed on and scanned across a surface of interest on the test object. During scanning the sensor is measured repeatedly at regular intervals. An encoder may be used to record the sensor position for each measurement. The measurement results are then correlated with one or more signatures in the signature library. A threshold is used to determine if the correlation is indicative of the detection of a pit. If so additional processing may be performed to estimate pit properties.
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4.发明申请公开(公告)号：US20190383771A1
公开(公告)日：2019-12-19
申请号：US16445166
申请日：2019-06-18
申请人： JENTEK Sensors, Inc.
IPC分类号： G01N27/72 , B33Y50/00 , B29C64/386
摘要： Disclosed are method and apparatus for measuring material properties. Segmented field sensors have multiple sensing elements at different spatial geometries to capture field components having substantially different depths of penetration. These sensors are excited and measured on these different sensing elements to facilitate characterization of unknown material properties. This is illustrated in some embodiments using eddy current sensors to characterize materials that are frequency dispersive and/or do not produce a measurable phase shifts. Only a single scalar quantity may provide independent information from one or more of the sensing elements. Property estimation techniques, such as those using precomputed databases of sensor responses are used to estimate the unknown material properties.
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5.发明申请公开(公告)号：US20230095662A1
公开(公告)日：2023-03-30
申请号：US17652993
申请日：2022-03-01
申请人： JENTEK Sensors, Inc.
IPC分类号： G01N27/72 , B33Y50/00 , B29C64/386
摘要： Disclosed are method and apparatus for measuring material properties. Segmented field sensors have multiple sensing elements at different spatial geometries to capture field components having substantially different depths of penetration. These sensors are excited and measured on these different sensing elements to facilitate characterization of unknown material properties. This is illustrated in some embodiments using eddy current sensors to characterize materials that are frequency dispersive and/or do not produce a measurable phase shifts. Only a single scalar quantity may provide independent information from one or more of the sensing elements. Property estimation techniques, such as those using precomputed databases of sensor responses are used to estimate the unknown material properties.
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公开(公告)号：US20210372968A1
公开(公告)日：2021-12-02
申请号：US17403139
申请日：2021-08-16
申请人： JENTEK Sensors, Inc.
发明人： Scott A. Denenberg , Yanko K. Sheiretov , Neil J. Goldfine , Todd M. Dunford , Andrew P. Washabaugh , Don Straney , Brian L. Manning
摘要： System and method for characterizing material condition. The system includes a sensor, impedance instrument and processing unit to collect measurements and assess material properties. A model of the system may be used to enable accurate measurements of multiple material properties. A cylindrical model for an electromagnetic field sensor is disclosed for modeling substantially cylindrically symmetric material systems. Sensor designs and data processing approaches are provided to focus the sensitivity of the sensor to localize material conditions. Improved calibration methods are shown. Sizing algorithms are provided to estimate the size of defects such as cracks and corrosion. Corrective measures are provided where the actual material configuration differs from the data processing assumptions. Methods are provided for use of the system to characterize material condition, and detailed illustration is given for corrosion, stress, weld, heat treat, and mechanical damage assessment.
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公开(公告)号：US09279784B2
公开(公告)日：2016-03-08
申请号：US14456567
申请日：2014-08-11
申请人： JENTEK Sensors, Inc.
CPC分类号： G01N27/90 , G01N27/9033 , G01R33/1215
摘要： A substantially planar eddy-current sensor having durability enhancing pillars in an active region is provided. The pillars are distributed and sized so as to have limited effect on the sensor's performance. When the sensor is mounted on a component such that the sensor experiences forces on a top and bottom surface, the pillars bear the load reducing the load bore by the active elements (e.g., drive winding, sense elements). A sensor with redundant drive windings and/or redundant sense elements is disclosed. The redundant elements may be connected to separate electronics. Another aspect relates to providing a reference transformer for calibration of a sensor. The secondary windings of the reference transformer are connected in series with the sense elements of the sensor to be calibrated. Transimpedance measurements are made when the drive winding of the reference transformer is excited. The measurements are used to correct transimpedance measurements made when the drive winding of the sensor is excited. A system having an impedance analyzer and a plurality of multiplexing units is disclosed for monitoring a plurality of sensor. Each multiplexing units directs an excitation signal to the drive winding of a respective sensor and returns, serially, the sense element responses back to the impedance analyzer. The system coordinates the excitation of each sensor and return of the sensor response to share a serial network. The multiplexing units may have a reference transformer for calibration of their respective sensors. Optical communication may be used.
摘要翻译： 提供了一种在有源区域中具有耐久性增强柱的基本平面的涡流传感器。 支柱的分布和尺寸是对传感器性能的影响有限的。 当传感器安装在组件上使得传感器在顶部和底部表面上经受力时，支柱承受由有源元件（例如，驱动绕组，感测元件）减小负载孔的负载。 公开了具有冗余驱动绕组和/或冗余感测元件的传感器。 冗余元件可以连接到单独的电子元件。 另一方面涉及提供用于校准传感器的参考变压器。 参考变压器的次级绕组与要校准的传感器的感测元件串联连接。 当参考变压器的驱动绕组被激励时进行跨阻抗测量。 测量用于校正当传感器的驱动绕组被激励时进行的跨阻抗测量。 公开了一种具有阻抗分析器和多个复用单元的系统，用于监视多个传感器。 每个复用单元将激励信号引导到相应传感器的驱动绕组，并将感测元件响应连续返回到阻抗分析器。 系统协调每个传感器的激励并返回传感器响应以共享串行网络。 复用单元可以具有用于校准其各自传感器的参考变压器。 可以使用光通信。
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公开(公告)号：US09772309B2
公开(公告)日：2017-09-26
申请号：US14566422
申请日：2014-12-10
申请人： JENTEK Sensors, Inc.
CPC分类号： G01N27/90 , G01N27/72 , G01N27/9046 , G01R33/0064 , G01R33/0094 , G01R33/093 , G01R33/10
摘要： Methods and apparatus for characterizing composite materials for manufacturing quality assurance (QA), periodic inspection during the useful life, or for forensic analysis/material testing. System are provided that relate eddy-current sensor responses to the fiber layup of a composite structure, the presence of impact damage on a composite structure with or without a metal liner, volumetric stress within the composite, fiber tow density, and other NDE inspection requirements. Also provided are systems that determine electromagnetic material properties and material dimensions of composite materials from capacitive sensor inspection measurements. These properties are related to the presence of buried defects in non-conductive composite materials, moisture ingress, aging of the material due to service or environmental/thermal exposure, or changes in manufacturing quality.
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公开(公告)号：US20150212044A1
公开(公告)日：2015-07-30
申请号：US14566422
申请日：2014-12-10
申请人： JENTEK Sensors, Inc.
IPC分类号： G01N27/90
CPC分类号： G01N27/90 , G01N27/72 , G01N27/9046 , G01R33/0064 , G01R33/0094 , G01R33/093 , G01R33/10
摘要： Methods and apparatus for characterizing composite materials for manufacturing quality assurance (QA), periodic inspection during the useful life, or for forensic analysis/material testing. System are provided that relate eddy-current sensor responses to the fiber layup of a composite structure, the presence of impact damage on a composite structure with or without a metal liner, volumetric stress within the composite, fiber tow density, and other NDE inspection requirements. Also provided are systems that determine electromagnetic material properties and material dimensions of composite materials from capacitive sensor inspection measurements. These properties are related to the presence of buried defects in non-conductive composite materials, moisture ingress, aging of the material due to service or environmental/thermal exposure, or changes in manufacturing quality.
摘要翻译： 表征用于制造质量保证（QA）的复合材料，使用寿命期间的定期检查或法医分析/材料测试的方法和装置。 提供了将涡电流传感器响应与复合结构的纤维叠层相关联的系统，在具有或不具有金属衬垫的复合结构上的冲击损伤的存在，复合材料内的体积应力，纤维丝束密度和其他NDE检查要求 。 还提供了从电容传感器检查测量确定复合材料的电磁材料性质和材料尺寸的系统。 这些性质与非导电复合材料中存在的掩埋缺陷有关，水分进入，由于使用或环境/热暴露引起的材料老化或制造质量的变化。
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