公开(公告)号：US20040056654A1

公开(公告)日：2004-03-25

申请号：US10441976

申请日：2003-05-20

Applicant: JENTEK Sensors, Inc.

Inventor： Neil J. Goldfine ,  Ian C. Shay ,  Darrell E. Schlicker ,  Andrew P. Washabaugh ,  David C. Grundy ,  Robert J. Lyons ,  Vladimir A. Zilberstein ,  Vladimir Tsukernik

IPC: G01N027/72 ,  G01R033/12

CPC classification number: G01N27/9013

Abstract: Described are methods for monitoring of stresses and other material properties. These methods use measurements of effective electrical properties, such as magnetic permeability and electrical conductivity, to infer the state of the test material, such as the stress, temperature, or overload condition. The sensors, which can be single element sensors or sensor arrays, can be used to periodically inspect selected locations, mounted to the test material, or scanned over the test material to generate two-dimensional images of the material properties. Magnetic field or eddy current based inductive and giant magnetoresistive sensors may be used on magnetizable and/or conducting materials, while capacitive sensors can be used for dielectric materials. Methods are also described for the use of state-sensitive layers to determine the state of materials of interest. These methods allow the weight of articles, such as aircraft, to be determined.

Abstract translation: 描述了用于监测应力和其他材料性质的方法。 这些方法使用诸如磁导率和电导率之类的有效电性能的测量来推断测试材料的状态，例如应力，温度或过载条件。 可以使用可以是单元件传感器或传感器阵列的传感器来周期性地检查安装到测试材料上的选定位置，或者在测试材料上扫描以产生材料性质的二维图像。 基于磁场或涡电流的感应和巨磁阻传感器可用于可磁化和/或导电材料，而电容传感器可用于介电材料。 还描述了使用状态敏感层来确定感兴趣的材料的状态的方法。 这些方法允许确定诸如飞机的物品的重量。

公开(公告)号：US20040000904A1

公开(公告)日：2004-01-01

申请号：US10454923

申请日：2003-06-05

Inventor： James E. Cotter

IPC: G01N027/72 ,  G01R033/12

CPC classification number: B65F1/1607 ,  B65F2210/1525 ,  G01V3/105

Abstract: A detector for finding metal objects being disposed in garbage includes a driving coil, a receiving coil, and a voltage detector. The driving coil encircles an opening formed in a ring-like lid for the trashcan. The controller connects to the driving coil and oscillates a driving current in the driving coil. A receiving coil is disposed parallel to the driving coil and has an current induced therein from the driving current in the driving coil. The voltage detector connects to the coil and detects changes in voltage of the inducted current when a metal object passes through the driving coil and the receiving coil. The coils can be constructed from a flat ribbon coil containing a plurality of parallel wires. The flat ribbon coil can be supported under a trashcan lid by a support.

Abstract translation: 用于发现垃圾中的金属物体的检测器包括驱动线圈，接收线圈和电压检测器。 驱动线圈围绕形成在用于垃圾桶的环状盖中的开口。 控制器连接到驱动线圈并使驱动线圈中的驱动电流振荡。 接收线圈平行于驱动线圈设置，并且具有从驱动线圈中的驱动电流感应的电流。 电压检测器连接到线圈，并且当金属物体通过驱动线圈和接收线圈时，检测感应电流的电压变化。 线圈可以由包含多条平行线的扁平带状线圈构成。 扁平带状线圈可以由支撑件支撑在垃圾桶盖下。

公开(公告)号：US20030201770A1

公开(公告)日：2003-10-30

申请号：US10447165

申请日：2003-05-27

Applicant: Applied Materials, Inc.

Inventor： Hiroji Hanawa ,  Nils Johansson ,  Boguslaw Swedek ,  Manoocher Birang

IPC: G01B007/06 ,  G01N027/72

CPC classification number: B24B37/013 ,  B24B37/205 ,  B24B49/02 ,  B24B49/105 ,  B24B49/12 ,  G01B7/105

Abstract: A sensor for monitoring a conductive film in a substrate during chemical mechanical polishing generates an alternating magnetic field that impinges a substrate and induces eddy currents. The sensor can have a core, a first coil wound around a first portion of the core and a second coil wound around a second portion of the core. The sensor can be positioned on a side of the polishing surface opposite the substrate. The sensor can detect a phase difference between a drive signal and a measured signal.

Abstract translation: 用于在化学机械抛光期间监测衬底中的导电膜的传感器产生撞击衬底并引起涡流的交变磁场。 传感器可以具有芯，围绕芯的第一部分缠绕的第一线圈和缠绕在芯的第二部分上的第二线圈。 传感器可以位于与衬底相对的抛光表面的一侧。 传感器可以检测到驱动信号和测量信号之间的相位差。

公开(公告)号：US20030173959A1

公开(公告)日：2003-09-18

申请号：US10361865

申请日：2003-02-11

Applicant: Pure Technologies Ltd.

Inventor： Peter O. Paulson ,  John McIntyre ,  Kevin Mitchell

IPC: G01N027/72 ,  G01R033/12

CPC classification number: G01N27/82 ,  G01N27/902 ,  G01N33/383

Abstract: Discloses methods to perform magnetic testing of tensioning elements in a pre-stressed concrete cylinder, such as a pipe or water reservoir and testing apparatus. The apparatus includes magnetic flux production means and detector means disposed proximal to a surface of the cylinder in a plane in common with the magnetic flux production means that is orthogonal to an axis of the cylinder. The apparatus operates over a range of low frequency signals, for example, between 20 and 300 hertz or a pulse. Output of the inspection apparatus includes a signal and distance plot showing the results of testing a cylinder at one or more frequencies. In accordance with another method of analysis, a characteristic of the phase of the output over distance is plotted, including the phase or representations of the in-phase or quadrature components of the received signal in relation to the driving signal.

Abstract translation: 公开了对预应力混凝土圆柱体（例如管道或储水器和测试装置）中的张紧元件进行磁性测试的方法。 该装置包括磁通量产生装置和检测装置，该装置在与与气缸的轴线正交的磁通量产生装置共同的平面内设置在气缸表面附近。 该装置在一些范围的低频信号上工作，例如在20和300赫兹或脉冲之间。 检查装置的输出包括示出以一个或多个频率测试圆筒的结果的信号和距离图。 根据另一种分析方法，绘制出距离输出相位的特征，包括相对于驱动信号的接收信号的同相或正交分量的相位或表示。

公开(公告)号：US20030169032A1

公开(公告)日：2003-09-11

申请号：US10331150

申请日：2002-12-30

Inventor： Ana Minchole ,  Andrea P. Astalan ,  Christer Johansson ,  Kerstin Lagerwall-Larsson ,  Anatol Krozer

IPC: G01N027/72 ,  G01N027/74

CPC classification number: G01N33/54326 ,  B82Y25/00 ,  G01N27/74 ,  G01R33/02 ,  G01R33/093 ,  G01R33/12 ,  G01R33/1269 ,  G01R33/16

Abstract: The present invention relates to a method for detecting changes of magnetic response of at least one magnetic particle provided with an external layer in a carrier fluid, wherein the method comprises using a measuring method comprising measuring the characteristic rotation time of said magnetic particle with respect to said external layer, which measuring method involves measuring Brownian relaxation in said carrier fluid under the influence of an external alternating magnetic field. The method implies that upon modification of the effective volume of the particle or its interaction with the carrier fluid a hydrodynamic volume of the particle changes, which implies a change of the frequency (fmax) where an out of phase component of the magnetic susceptibility has its maximum.

Abstract translation: 本发明涉及一种用于检测在载体流体中设置有外层的至少一个磁性颗粒的磁响应变化的方法，其中该方法包括使用测量方法，该方法包括测量所述磁性颗粒相对于 所述外层，该测量方法涉及在外部交变磁场的影响下测量所述载流体中的布朗态松弛。 该方法意味着在改变颗粒的有效体积或其与载体流体的相互作用时，颗粒的流体动力学体积变化，这意味着磁化率的异相成分具有其磁化率的频率（fmax）的变化 最大值。

公开(公告)号：US20030164699A1

公开(公告)日：2003-09-04

申请号：US10087871

申请日：2002-03-01

Inventor： Mark John DeBlock ,  W. R. Hugh Fife

IPC: G01B007/14 ,  G01R033/00 ,  G01N027/72 ,  G01B007/30

CPC classification number: G01B7/312 ,  G01B21/12 ,  G01N27/9033

Abstract: A method for separating electrical runout from mechanical runout includes positioning at least one position probe against a rotating part, positioning at least one proximity probe adjacent the rotating part, and calculating an electrical runout based on measurements obtained from the position probe and the proximity probe.

Abstract translation: 用于将电气跳动与机械跳动分离的方法包括将至少一个位置探针定位在旋转部件上，将邻近旋转部件的至少一个邻近探头定位，以及基于从位置探头和接近探头获得的测量值来计算电跳动。

公开(公告)号：US20030151404A1

公开(公告)日：2003-08-14

申请号：US10257536

申请日：2002-10-15

Inventor： Jean-Louis Lescourret

IPC: G01R035/00 ,  G01R033/00 ,  G01N027/72

CPC classification number: G01R33/02 ,  G01V13/00

Abstract: The invention relates to a device for measuring magnetic field(s). This device comprises at least one measurement acquisition pathway (221, 222, 223; 231, 232, 233) comprising a measurement current generator (24), a coil (25), a measurement resistor (26), at least one amplifier (27) and at least one antialiasing filter, delivering a measurement voltage. According to the invention, the device for measuring magnetic field(s) comprises means for determination of at least one electrical quantity representative of said acquisition pathway. These means of determination comprise means of injection (21) of a predetermined calibration current, comprising at least two frequency terms at at least two frequencies distinct from that (those) of said measurement current, said calibration current being superimposed on said measurement current. The device for measuring magnetic field(s) also comprises calculation means delivering an estimate of said at least one electrical quantity at the frequency or frequencies of said measurement current.

Abstract translation: 本发明涉及一种用于测量磁场的装置。 该装置包括至少一个包括测量电流发生器（24），线圈（25），测量电阻器（26），至少一个放大器（27）和至少一个放大器（221,222,223,231,232,233,233） ）和至少一个抗混叠滤波器，提供测量电压。 根据本发明，用于测量磁场的装置包括用于确定表示所述采集路径的至少一个电量的装置。 这些确定装置包括预定校准电流的注入装置（21），包括至少两个与所述测量电流（那些）不同的频率的频率项，所述校准电流叠加在所述测量电流上。 用于测量磁场的装置还包括以所述测量电流的频率或频率递送所述至少一个电量的估计的计算装置。

公开(公告)号：US20030076092A1

公开(公告)日：2003-04-24

申请号：US10272825

申请日：2002-10-18

Applicant: NEC Corporation

Inventor： Shigeki Hoshino

IPC: G01N027/72 ,  G01R001/00

CPC classification number: G01R31/002 ,  G01R29/0814 ,  H05K1/0268 ,  H05K1/0298

Abstract: The intensity of electric and magnetic component is measured at a high-speed without reducing spatial resolution. An electric and magnetic field detection device 10 has an electric field detection device 1 for detecting an electric field component, and a magnetic field detection device 2 for detecting a magnetic field component. These detection devices are so formed on a multilayer printed circuit board 4 that they can be operated independently.

Abstract translation: 在不降低空间分辨率的情况下高速测量电磁分量的强度。 电场检测装置10具有用于检测电场成分的电场检测装置1和用于检测磁场成分的磁场检测装置2。 这些检测装置形成在多层印刷电路板4上，可独立地操作。

公开(公告)号：US20030038627A1

公开(公告)日：2003-02-27

申请号：US10098383

申请日：2002-03-18

Inventor： John Krause ,  Jefferey Lindemuth ,  Edward Maloof ,  David Plaga

IPC: G01N027/72

CPC classification number: G01R33/1215

Abstract: A vibrating sample magnetometer controls an electromechanical drive using both ac and dc control and a position sensor. Absolute position sensing is used in a feedback loop to control both an alternating current (ac) drive and a direct current (dc) drive to the electromechanical drive. Improved performance and stability results.

Abstract translation: 振动样品磁力计控制使用交流和直流控制和位置传感器的机电驱动。 绝对位置感测用于反馈回路，以控制交流（ac）驱动和直流（dc）驱动到机电驱动。 改进的性能和稳定性结果。

公开(公告)号：US20030030433A1

公开(公告)日：2003-02-13

申请号：US10107317

申请日：2002-03-28

Applicant: Avistar, Inc. dba Reliadigm

Inventor： Albert Migliori ,  George W. Rhodes

IPC: G01N027/72 ,  G01N027/82 ,  G01R033/12

CPC classification number: G01N27/82 ,  G01N27/9046

Abstract: An inductive bridge circuit using mutual inductances to transform impedances is used for detection of wall-thinning defects in metals. The bridge circuit has a first test coil placed adjacent to a good metal section and a second test coil placed adjacent to a metal to be tested. The bridge circuit compares the inductance in the first coil and inductance in the second test coil to compare wall thinning defects. The apparatus may also include first and second measuring transformers which are connected between the bridge circuit and the test coils where the transformers provide for impedance matching and reduced current requirements in the bridge. The circuit may also include one or more potentiometer circuits connected across the bridge which are used for compensating for imbalance of impedance between the first and second test coils when the coils both have known good metal sections adjacent to them.

Abstract translation: 使用互感来变换阻抗的电感桥式电路用于检测金属中的壁薄化缺陷。 桥接电路具有与良好金属部分相邻放置的第一测试线圈和与要测试的金属相邻放置的第二测试线圈。 桥式电路比较第一线圈中的电感和第二测试线圈中的电感，以比较壁变薄缺陷。 该装置还可以包括连接在桥式电路和测试线圈之间的第一和第二测量变压器，其中变压器提供桥梁中的阻抗匹配和减小的电流要求。 该电路还可以包括一个或多个连接在桥上的电位计电路，用于补偿当线圈都具有与它们相邻的已知的良好金属部分时第一和第二测试线圈之间的阻抗的不平衡。