公开(公告)号：US20060244443A1

公开(公告)日：2006-11-02

申请号：US11343741

申请日：2006-01-30

申请人： Neil Goldfine ,  Andrew Washabaugh ,  Yanko Sheiretov ,  Darrell Schlicker ,  Robert Lyons ,  Mark Windoloski ,  Christopher Craven ,  Vladimir Tsukernik ,  David Grundy

发明人： Neil Goldfine ,  Andrew Washabaugh ,  Yanko Sheiretov ,  Darrell Schlicker ,  Robert Lyons ,  Mark Windoloski ,  Christopher Craven ,  Vladimir Tsukernik ,  David Grundy

IPC分类号： G01N27/72

CPC分类号： G01N27/9046

摘要： Eddy current sensors and sensor arrays are used for process quality and material condition assessment of conducting materials. In an embodiment, changes in spatially registered high resolution images taken before and after cold work processing reflect the quality of the process, such as intensity and coverage. These images also permit the suppression or removal of local outlier variations. Anisotropy in a material property, such as magnetic permeability or electrical conductivity, can be intentionally introduced and used to assess material condition resulting from an operation, such as a cold work or heat treatment. The anisotropy is determined by sensors that provide directional property measurements. The sensor directionality arises from constructs that use a linear conducting drive segment to impose the magnetic field in a test material. Maintaining the orientation of this drive segment, and associated sense elements, relative to a material edge provides enhanced sensitivity for crack detection at edges.

摘要翻译： 涡流传感器和传感器阵列用于导电材料的工艺质量和材料状况评估。 在一个实施例中，在冷加工处理之前和之后拍摄的空间注册的高分辨率图像的变化反映了过程的质量，例如强度和覆盖。 这些图像还允许抑制或去除局部异常值变化。 可以有意地引入材料性质的各向异性，例如磁导率或电导率，以用于评估由诸如冷加工或热处理的操作引起的材料状况。 各向异性由提供定向性质测量的传感器确定。 传感器方向性来自使用线性传导驱动段将磁场施加在测试材料中的结构。 维持该驱动段和相关感测元件相对于材料边缘的方向为边缘处的裂纹检测提供了增强的灵敏度。

公开(公告)号：US20070069720A1

公开(公告)日：2007-03-29

申请号：US11229844

申请日：2005-09-19

申请人： Neil Goldfine ,  Mark Windoloski ,  David Grundy ,  Yanko Sheiretov ,  Darrell Schlicker ,  Andrew Washabaugh

发明人： Neil Goldfine ,  Mark Windoloski ,  David Grundy ,  Yanko Sheiretov ,  Darrell Schlicker ,  Andrew Washabaugh

IPC分类号： G01N27/82

CPC分类号： G01N27/72

摘要： Nondestructive material condition monitoring and assessment is accomplished by placing, mounting, or scanning magnetic and electric field sensors and sensor arrays over material surfaces. The material condition can be inferred directly from material property estimates, such as the magnetic permeability, dielectric permittivity, electrical property, or thickness, or from a correlation with these properties. Hidden cracks in multiple layer structures in the presence of fasteners are detected by combining multiple frequency magnetic field measurements and comparing the result to characteristic signature responses. The threshold value for indicating a crack is adjusted based on a high frequency measurement that accounts for fastener type. The condition of engine disk slot is determined without removal of the disk from the engine by placing near the disk a fixture that contains a sensor for scanning through the slot and means for recording position within the slot. Inflatable support structures can be placed behind the sensor to improve and a guide can be used to align sensor with the slot and for rotating the disk. The condition of an interface between a conducting substrate and a coating is assessed by placing a magnetic field sensor on the opposite side of the substrate from the coating and monitoring at least one model parameter for the material system, with the model parameter correlated to the interfacial condition. The model parameter is typically a magnetic permeability that reflects the residual stress at the interface. Sensors embedded between material layers are protected from damage by placing shims on the faying surface. After determining the areas to be monitored and the areas likely to cause sensor damage, a shim thickness is determined and is then placed in at least one area not being monitored by a sensor. The condition of a test fluid is assessed through a dielectric sensor containing a contaminant-sensitive material layer. The properties of the layer are monitored with the dielectric sensor and correlated to contaminant level.

公开(公告)号：US20060097718A1

公开(公告)日：2006-05-11

申请号：US11249047

申请日：2005-10-11

申请人： Darrell Schlicker ,  Neil Goldfine ,  Andrew Washabaugh ,  Yanko Sheiretov ,  Mark Windoloski

发明人： Darrell Schlicker ,  Neil Goldfine ,  Andrew Washabaugh ,  Yanko Sheiretov ,  Mark Windoloski

IPC分类号： G01R33/12

CPC分类号： G01N27/023

摘要： Local features such as cracks in materials are nondestructively characterized by measuring a response with an electromagnetic sensor and converting this response into a selected property using a database. The database is generated prior to data acquisition by using a model to generate a baseline response or field distribution for the sensor and combining these results with another model, which may be simpler than the first model or provide a local representation of the field perturbations around a feature, which is evaluated multiple times over a range of values of the selected property. In addition, the presence of a feature may be detected by converting the sensor response into a reference parameter, such as a lift-off factor that reflects the sensor position relative to a material edge, and using this parameter to determine a reference response that can be compared to the measured response.

摘要翻译： 局部特征如材料中的裂纹是非破坏性的，其特征在于通过用电磁传感器测量响应并使用数据库将该响应转换成选定的属性。 在数据采集之前通过使用模型生成数据库以生成传感器的基线响应或场分布，并将这些结果与另一模型相结合，该模型可以比第一模型更简单，或者提供周围的场扰动的局部表示 功能，在所选属性的值范围内多次评估。 此外，可以通过将传感器响应转换为参考参数来检测特征的存在，所述参考参数例如反映相对于材料边缘的传感器位置的剥离因子，并且使用该参数来确定可以 与测量响应进行比较。

公开(公告)号：US20070007955A1

公开(公告)日：2007-01-11

申请号：US11473297

申请日：2006-06-22

申请人： Neil Goldfine ,  David Grundy ,  Andrew Washabaugh ,  Yanko Sheiretov ,  Darrell Schlicker

发明人： Neil Goldfine ,  David Grundy ,  Andrew Washabaugh ,  Yanko Sheiretov ,  Darrell Schlicker

IPC分类号： G01N27/82

CPC分类号： G01N27/82

摘要： Damage and usage conditions in the vicinity of fasteners in joined structures are nondestructively evaluated using the fasteners themselves. Sensors or sensor conductors are embedded in the fasteners or integrated within the fastener construct, either in the clearance gap between the fastener and the structure material or as an insert inside the shaft or pin of the fastener. The response of the material to an interrogating magnetic or electric field is then measured with drive and sense electrodes both incorporated into the fastener or with either drive or sense electrodes external to the fastener on the material surface. In another configuration, an electric current is applied to one or more fasteners and the electric potential is measured at locations typically between the driven electrodes applying the current. The potential is measured circumferentially around the fastener at locations on the material surface or across pairs of fasteners throughout or along the joint. The voltage or potential measurement electrodes may be collinear with the drive electrodes. State sensitive material layers can be added either to the fastener or the test material layers in order to enhance observability of the test material condition, such as the presence of a crack, mechanical stress, delamination, or disbond.

摘要翻译： 使用紧固件本身对接合结构中紧固件附近的损坏和使用条件进行非破坏性评估。 传感器或传感器导体嵌入到紧固件中或整合在紧固件结构内，无论是在紧固件和结构材料之间的间隙中，或者作为紧固件的轴或销内的插入件。 然后测量材料对询问磁场或电场的响应，其中驱动和感测电极两者并入到紧固件中，或者与材料表面上的紧固件外部的驱动或感测电极结合。 在另一种配置中，电流被施加到一个或多个紧固件，并且在通常在施加电流的驱动电极之间的位置处测量电位。 在整个或沿着接头的材料表面上或穿过成对的紧固件的位置周围围绕紧固件测量电位。 电压或电位测量电极可与驱动电极共线。 可以将状态敏感材料层添加到紧固件或测试材料层中，以便增强测试材料状况的可观察性，例如存在裂纹，机械应力，分层或脱粘。

公开(公告)号：US20060247896A1

公开(公告)日：2006-11-02

申请号：US11371315

申请日：2006-03-07

申请人： Neil Goldfine ,  Darrell Schlicker ,  Yanko Sheiretov ,  Andrew Washabaugh ,  David Grundy ,  Vladimir Zilberstein

发明人： Neil Goldfine ,  Darrell Schlicker ,  Yanko Sheiretov ,  Andrew Washabaugh ,  David Grundy ,  Vladimir Zilberstein

IPC分类号： G06F15/00

CPC分类号： G01N22/00

摘要： The condition of insulating and semiconducting dielectric materials is assessed by a sensor array that uses electric fields to interrogate the test material. The sensor has a linear array of parallel drive conductors interconnected to form a single drive electrode and sense conductors placed on each side of and parallel to a drive conductor. Subsets of the sense conductors are interconnected to form at least two sense elements sensitive to different material regions. The sense conductors may be at different distances to the drive conductors, enabling measurement sensitivity to different depths into the test material. The material condition is assessed directly from the sense element responses or after conversion to an effective material property, such as an electrical conductivity or dielectric permittivity.

摘要翻译： 绝缘和半导体介电材料的条件通过使用电场询问测试材料的传感器阵列来评估。 传感器具有互连以形成单个驱动电极的线性阵列和放置在驱动导体的平行于驱动导体的每一侧上的感测导体。 感测导体的子集互连以形成对不同材料区域敏感的至少两个感测元件。 感测导体可以距离驱动导体不同的距离，使测量灵敏度不同于测试材料的深度。 材料条件直接由感应元件响应或转换为有效材料性质（如导电率或介电常数）进行评估。

公开(公告)号：US20070239407A1

公开(公告)日：2007-10-11

申请号：US11653067

申请日：2007-01-12

申请人： Neil Goldfine ,  Vladimir Zilberstein ,  Volker Weiss ,  Yanko Sheiretov

发明人： Neil Goldfine ,  Vladimir Zilberstein ,  Volker Weiss ,  Yanko Sheiretov

IPC分类号： G06F17/10

CPC分类号： G01N27/82 ,  F05B2270/109 ,  F05B2270/404 ,  G01B7/34 ,  G06N7/005

摘要： Predicting the remaining life of individual aircraft, fleets of aircraft, aircraft components and subpopulations of these components. This is accomplished through the use of precomputed databases of response that are generated from a model for the nonlinear system behavior prior to the time that decisions need to be made concerning the disposition of the system. The database is calibrated with a few data points, to account for unmodeled system variables, and then used with an input variable to predict future system behavior. These methods also permit identification of the root causes for observed system behavior. The use of the response databases also permits rapid estimations of uncertainty estimates for the system behavior, such as remaining life estimates, particularly, when subsets of an input variable distribution are passed through the database and scaled appropriately to construct the output distribution. A specific example is the prediction of remaining life for an aircraft component where the model calculates damage evolution, input variables are a crack size and the number of cycles, and the predicted parameters are the actual stress on the component and the remaining life.

摘要翻译： 预测个别飞机，飞机机队，飞机部件和这些部件的子群体的剩余寿命。 这是通过使用预先计算的响应数据库来实现的，该数据库是在关于系统的配置的决定之前从非线性系统行为的模型生成的。 数据库使用几个数据点进行校准，以解释未建模的系统变量，然后与输入变量一起使用以预测未来的系统行为。 这些方法还允许识别观察到的系统行为的根本原因。 响应数据库的使用还允许对系统行为的不确定性估计的快速估计，例如剩余寿命估计，特别是当输入变量分布的子集通过数据库并适当地缩放以构建输出分布时。 一个具体的例子是对模型计算损伤演化的飞机部件的剩余寿命的预测，输入变量是裂纹尺寸和循环次数，预测参数是组件上的实际应力和剩余寿命。

公开(公告)号：US06486673B1

公开(公告)日：2002-11-26

申请号：US09488241

申请日：2000-01-20

申请人： Neil J. Goldfine ,  Darrell E. Schlicker ,  Markus Zahn ,  Wayne D. Ryan ,  Yanko Sheiretov ,  Andrew Washabaugh

发明人： Neil J. Goldfine ,  Darrell E. Schlicker ,  Markus Zahn ,  Wayne D. Ryan ,  Yanko Sheiretov ,  Andrew Washabaugh

IPC分类号： G01R2726

CPC分类号： G01V3/088 ,  G01V3/104

摘要： A dielectrometer with a sensor face that carries an excitation electrode driven with a varying voltage. At least two sensing electrodes and a guard electrode are also carried by the sensor face. The sensing electrodes are adapted for single or multiple penetration depth measurements into a test material. The guard electrode surrounds the sensing electrodes and is at about the same voltage as the sensing electrodes.

摘要翻译： 具有传感器面的介电电感器，其具有以变化的电压驱动的激励电极。 至少两个感测电极和保护电极也由传感器面承载。 传感电极适用于测试材料的单次或多次穿透深度测量。 保护电极围绕感测电极并且与感测电极处于大致相同的电压。