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    Magnetic coupling for electrical conductivity assessment
    2.
    发明授权
    Magnetic coupling for electrical conductivity assessment 有权

    公开(公告)号：US09753072B2

    公开(公告)日：2017-09-05

    申请号：US14459380

    申请日：2014-08-14

    申请人： The Boeing Company

    发明人： Donald K. Dabelstein ,  Andrew M. Robb ,  Arlene M. Brown

    IPC分类号： H04B5/00 ,  G01R33/54 ,  G01R29/08 ,  G01N27/02

    CPC分类号： G01R29/0835 ,  G01N27/025

    摘要： A method is provided that includes setting up a composite material structure under test (SUT) between a transmit coil and a receive coil. The transmit coil is driven with a RF signal over a plurality of frequencies, thereby causing the transmit coil to produce a magnetic field that by magnetic coupling through the SUT induces a voltage in the receive coil. The voltage in the receive coil is measured, and from the voltage, a measurement of attenuation of the RF signal caused by the SUT between the transmit coil and receive coil is produced. And an effective conductivity of the SUT is calculated from the measurement of attenuation.

    SHIELD INSPECTION DEVICE AND SHIELD INSPECTION METHOD
    5.
    发明申请
    SHIELD INSPECTION DEVICE AND SHIELD INSPECTION METHOD 审中-公开
    屏蔽检测装置和屏蔽检测方法

    公开(公告)号：US20130241572A1

    公开(公告)日：2013-09-19

    申请号：US13721501

    申请日：2012-12-20

    申请人： FUJITSU LIMITED

    发明人： Yoshihiro SAWADA ,  Kenji Nagase ,  Yoshiaki Hiratsuka ,  Tomoyuki Nakao ,  Keisuke Nakamura

    IPC分类号： G01R29/08

    CPC分类号： G01R29/0835

    摘要： A grouping unit groups closely arranged wirings to be protected from among a plurality of wirings to be protected by means of a shield and arranged on a circuit board. A division unit divides, for each of the grouped groups, a region around the group on the circuit board into a plurality of divided regions. A determination unit determines the existence of a shield for each of the divided regions.

    摘要翻译： 分组单元将要被保护的紧密布置的布线组合在待通过屏蔽保护并布置在电路板上的多个布线之间。 分割单元对于每个分组组，将电路板上的组周围的区域划分成多个分割区域。 确定单元确定每个分割区域的屏蔽的存在。

    Electromagnetic protection test and surveillance system
    6.
    发明授权
    Electromagnetic protection test and surveillance system 失效
    电磁保护测试和监控系统

    公开(公告)号：US06987392B1

    公开(公告)日：2006-01-17

    申请号：US10839835

    申请日：2004-05-05

    申请人： Arecio A. Hernandez ,  David George Hoyt

    发明人： Arecio A. Hernandez ,  David George Hoyt

    IPC分类号： G01R27/28

    CPC分类号： G01R29/0835

    摘要： A test architecture performs calibration and site verification testing of the effectiveness of a radiation shielding structure within which electronic equipment is housed. An external subsystem is outside a shielding cabinet, and an internal subsystem resides with the electronic equipment within the shielded equipment housing proper. The external subsystem includes a host computer, which controls the operation of transmit and receive subsystems. An external receiver is selectively coupled by the host processor to either an RF receive antenna or to a current sense probe. All control signals from the external subsystem are conveyed into the shielded cabinet by way of fiber optic links, in order to preserve the shielding effectiveness of the cabinet. Having the source of test signals and its associated transmission antenna located within the shielded cabinet serves to minimize the impact of such signals on circuits within the environment outside the cabinet.

    摘要翻译： 测试架构对电子设备所在的辐射屏蔽结构的有效性进行校准和现场验证测试。 外部子系统位于屏蔽柜外部，内部子系统位于屏蔽设备外壳内的电子设备。 外部子系统包括主机，用于控制发送和接收子系统的操作。 外部接收器被主处理器选择性地耦合到RF接收天线或电流检测探针。 来自外部子系统的所有控制信号通过光纤链路传送到屏蔽柜中，以保持机柜的屏蔽效能。 将测试信号源及其相关的发射天线放置在屏蔽柜内，用于最小化这种信号对机柜外部环境中电路的影响。

    Method and system utilizing radio frequency for testing the electromagnetic shielding effectiveness of an electromagnetically shielded enclosure
    7.
    发明授权
    Method and system utilizing radio frequency for testing the electromagnetic shielding effectiveness of an electromagnetically shielded enclosure 失效
    利用射频测试电磁屏蔽外壳的电磁屏蔽效能的方法和系统

    公开(公告)号：US5828220A

    公开(公告)日：1998-10-27

    申请号：US505582

    申请日：1995-11-02

    申请人： Thomas Lee Carney ,  Michael Kent McInerney

    发明人： Thomas Lee Carney ,  Michael Kent McInerney

    IPC分类号： G01R31/00

    CPC分类号： G01R29/0835 ,  H05K9/0069

    摘要： A system and method for continuously monitoring the shielding effectivenessf an electromagnetically shielded enclosure is disclosed including an RF transmitter positioned remote from the shielded enclosure. RF signals emitted from the remotely positioned transmitter are received by both an enclosure receiver positioned inside of the enclosure and simultaneously by a reference receiver having its antenna positioned outside of the shielded enclosure. These two received signals are mixed so as to produce IF signals which are subsequently forwarded to a synchronous detector which determines the ratio of the two signal levels by comparing their strengths. This ratio is indicative of the enclosure's electromagnetic shielding effectiveness. If the effectiveness drops below a predetermined or threshold limit, such is determined by a comparator positioned within the enclosure and an alarm may be sounded so as to indicate that the shield is failing. Accordingly, the effectiveness of the electromagnetic shield may be monitored twenty-four hours a day. It is also noted that the remotely positioned transmitter may be that of an existing radio station according to certain embodiments of this invention.

    摘要翻译： 公开了一种用于连续监测电磁屏蔽外壳的屏蔽效能的系统和方法，包括远离屏蔽外壳的RF发射器。 从位于远程位置的发射器发射的RF信号由位于机壳内部的机壳接收器同时由其天线定位在屏蔽外壳外部的参考接收器同时接收。 这两个接收信号被混合，以产生IF信号，随后将其转发到同步检测器，该同步检测器通过比较它们的强度来确定两个信号电平的比率。 该比率表示外壳的电磁屏蔽效能。 如果效能降低到预定或临界极限以下，则由位于外壳内的比较器确定，并且可以发出警报以指示屏蔽件发生故障。 因此，可以每天二十四小时监视电磁屏蔽的有效性。 还应注意，根据本发明的某些实施例，远程定位的发射机可以是现有无线电台的发射机。

    Testing electromagnetic shielding effectiveness of shielded enclosures
    9.
    发明授权
    Testing electromagnetic shielding effectiveness of shielded enclosures 失效
    测试屏蔽外壳的电磁屏蔽效能

    公开(公告)号：US5153524A

    公开(公告)日：1992-10-06

    申请号：US330247

    申请日：1989-03-29

    申请人： Ray G. McCormack

    发明人： Ray G. McCormack

    IPC分类号： G01R29/08

    CPC分类号： G01R29/0835

    摘要： A method for determining the electromagnetic RF shielding effectiveness of a shielding enclosure including sequentially driving the four diagonally opposite corner pairs of the enclosure with a RF signal, measuring the RF energy leakage for each corner pair, and averaging the four measured RF leakage levels to obtain an average RF energy leakage level. This average RF energy leakage level may then be compared with prior (preferably immediately after manufacture) measured average RF energy leakage levels to obtain an indication of the RF energy shielding effectiveness lost, if any, during the time from the prior test to the current test.

    摘要翻译： 一种用于确定屏蔽外壳的电磁RF屏蔽效能的方法，包括用RF信号顺序驱动外壳的四个对角相对的角对，测量每个角对的RF能量泄漏，并平均四个测量的RF泄漏电平以获得 平均RF能量泄漏水平。 然后可以将该平均RF能量泄漏水平与先前（优选紧接在制造之后）测量的平均RF能量泄漏水平进行比较，以获得在从先前测试到当前测试的时间期间RF能量屏蔽效能的损失（如果有的话）的指示 。

    Transient electromagnetic field detector
    10.
    发明授权
    Transient electromagnetic field detector 失效
    瞬态电磁场探测器

    公开(公告)号：US4631473A

    公开(公告)日：1986-12-23

    申请号：US675252

    申请日：1984-11-27

    申请人： Masamitsu Honda

    发明人： Masamitsu Honda

    IPC分类号： G01R29/08 ,  G01R31/02

    CPC分类号： G01R29/0835 ,  G01R29/0814

    摘要： A high frequency electromagnetic field detector for detecting high frequency electromagnetic fields comprises a micro antenna for mainly receiving the induction term of the electromagnetic field, an amplifier for amplifying a voltage induced on the antenna, a comparator circuit for comparing the output of the amplifier with a predetermined reference level to output a signal indicating that the output exceeds the reference level, and an indicator in response to the signal from the comparator circuit for indicating it.

    摘要翻译： 用于检测高频电磁场的高频电磁场检测器包括用于主要接收电磁场的感应项的微天线，用于放大天线感应电压的放大器，用于将放大器的输出与 预定的参考电平以输出指示输出超过参考电平的信号，以及响应于来自比较器电路的用于指示该信号的信号的指示符。