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97 条记录 (耗时 0.024 秒)

    Method and apparatus for locally shielding MR superconducting magnet coil
    51.
    发明授权
    Method and apparatus for locally shielding MR superconducting magnet coil 有权
    用于局部屏蔽MR超导磁体线圈的方法和装置

    公开(公告)号：US07352183B2

    公开(公告)日：2008-04-01

    申请号：US11425860

    申请日：2006-06-22

    申请人： Xianrui Huang

    发明人： Xianrui Huang

    IPC分类号： G01V3/00

    CPC分类号： G01R33/3815 ,  G01R33/3856 ,  G01R33/4215

    摘要： A method and apparatus for local grading shielding includes a gradient shield loop having a plurality of arcs positioned adjacent to a superconducting magnet coil. The plurality of arcs magnetically couple with a gradient magnetic field generated by a magnetic field gradient to locally shield the superconducting magnet coil.

    摘要翻译： 用于局部分级屏蔽的方法和装置包括具有邻近超导磁体线圈定位的多个弧的梯度屏蔽环。 多个电弧与由磁场梯度产生的梯度磁场磁耦合以局部屏蔽超导磁体线圈。

    System and method for quench protection of a superconductor
    52.
    发明授权
    System and method for quench protection of a superconductor 失效
    超导体淬火保护的系统和方法

    公开(公告)号：US07342757B2

    公开(公告)日：2008-03-11

    申请号：US10878589

    申请日：2004-06-28

    申请人： Xianrui Huang ,  Kiruba Haran Sivasubramaniam ,  James William Bray ,  David Thomas Ryan

    发明人： Xianrui Huang ,  Kiruba Haran Sivasubramaniam ,  James William Bray ,  David Thomas Ryan

    IPC分类号： H02H5/04 ,  H02H7/08 ,  H02H7/00 ,  H02H9/00 ,  H01H73/00 ,  H01F36/00 ,  H01F1/00 ,  H01F6/00 ,  H01F7/00

    CPC分类号： H02H7/001 ,  H01F6/02 ,  Y02E40/68

    摘要： A system and method for protecting a superconductor from a quench condition. A quench protection system is provided to protect the superconductor from damage due to a quench condition. The quench protection system comprises a voltage detector operable to detect voltage across the superconductor. The system also comprises a frequency filter coupled to the voltage detector. The frequency filter is operable to couple voltage signals to a control circuit that are representative of a rise in superconductor voltage caused by a quench condition and to block voltage signals that are not. The system is operable to detect whether a quench condition exists in the superconductor based on the voltage signal received via the frequency filter and to initiate a protective action in response.

    摘要翻译： 一种用于保护超导体免受淬火条件的系统和方法。 提供淬火保护系统以保护超导体免受由于淬火条件的损害。 猝熄保护系统包括可操作以检测超导体两端的电压的电压检测器。 该系统还包括耦合到电压检测器的频率滤波器。 频率滤波器可操作以将电压信号耦合到表示由骤冷条件引起的超导体电压升高的控制电路，并且阻止不是的电压信号。 该系统可操作以基于经由频率滤波器接收的电压信号来检测超导体中是否存在淬火条件，并响应于启动保护动作。

    Cryogenic cooling system and method with cold storage device
    55.
    发明授权
    Cryogenic cooling system and method with cold storage device 有权
    低温冷却系统及冷库装置

    公开(公告)号：US07003977B2

    公开(公告)日：2006-02-28

    申请号：US10604415

    申请日：2003-07-18

    申请人： Albert Eugene Steinbach ,  Robert Adolph Ackermann ,  Xianrui Huang

    发明人： Albert Eugene Steinbach ,  Robert Adolph Ackermann ,  Xianrui Huang

    IPC分类号： F25D11/00

    CPC分类号： F25B9/14 ,  F25B25/005 ,  F25B2400/06 ,  F25B2400/24 ,  F28D17/02

    摘要： A cooling system for providing cryogenic cooling fluid to an apparatus comprises a re-circulation device, a passive cold storage device having a porous matrix of material which directly contacts the cryogenic cooling fluid as the cryogenic cooling fluid passes through the passive cold storage device, a first portion of a fluid communication feed line fluidly connecting the re-circulation device to the passive cold storage device, a second portion of a fluid communication feed line fluidly connecting the passive cold storage device to the apparatus for communicating cryogenic cooling fluid to the apparatus, and a fluid communication return line fluidly connecting the apparatus to the re-circulation device. The passive cold storage device may comprise a regenerative heat exchanger including a porous matrix of metal wire mesh, metal spheres or ceramic spheres.

    摘要翻译： 用于向装置提供低温冷却流体的冷却系统包括再循环装置，被动冷藏装置，其具有当低温冷却流体通过被动冷藏装置时直接接触低温冷却流体的多孔材料基质， 将再循环装置流体地连接到被动冷藏装置的流体连通馈送线的第一部分，将被动冷藏装置流体地连接到用于将低温冷却流体传送到装置的装置的流体连通馈送线的第二部分， 以及将该装置流体连接到再循环装置的流体连通回流管线。 被动冷藏装置可包括再生热交换器，其包括金属丝网，金属球或陶瓷球的多孔基体。

    Quench monitoring and control system and method of operating same
    56.
    发明申请
    Quench monitoring and control system and method of operating same 失效
    淬火监控系统及运行方式相同

    公开(公告)号：US20050218731A1

    公开(公告)日：2005-10-06

    申请号：US10813281

    申请日：2004-03-30

    申请人： David Ryan ,  Evangelos Laskaris ,  Xianrui Huang

    发明人： David Ryan ,  Evangelos Laskaris ,  Xianrui Huang

    IPC分类号： H02K7/10 ,  H02K11/00 ,  H02K55/04 ,  H02P15/00

    CPC分类号： H02K55/04 ,  H02K11/25 ,  Y02E40/625

    摘要： A rotating machine comprising a superconductive coil and a temperature sensor operable to provide a signal representative of superconductive coil temperature. The rotating machine may comprise a control system communicatively coupled to the temperature sensor. The control system may be operable to reduce electric current in the superconductive coil when a signal representative of a defined superconducting coil temperature is received from the temperature sensor.

    摘要翻译： 一种包括超导线圈和温度传感器的旋转机器，其可操作以提供代表超导线圈温度的信号。 旋转机器可以包括通信地耦合到温度传感器的控制系统。 当从温度传感器接收到表示限定的超导线圈温度的信号时，控制系统可以可操作地减小超导线圈中的电流。

    Systems and methods for gradient compensation in magnetic resonance imaging
    59.
    发明授权
    Systems and methods for gradient compensation in magnetic resonance imaging 有权
    磁共振成像中梯度补偿的系统和方法

    公开(公告)号：US06850066B2

    公开(公告)日：2005-02-01

    申请号：US10438523

    申请日：2003-05-15

    申请人： Timothy J. Havens ,  Xianrui Huang ,  David T Ryan

    发明人： Timothy J. Havens ,  Xianrui Huang ,  David T Ryan

    IPC分类号： G01R33/385 ,  A61B5/055 ,  G01R33/3875 ,  G01R33/389 ,  G01R33/421 ,  G01V3/00

    CPC分类号： G01R33/4215 ,  G01R33/3875 ,  G01R33/389

    摘要： A gradient compensation system comprising a magnet assembly, at least one field-generating gradient coil operable for generating magnetic field gradients in three orthogonal coordinates, and at least one gradient compensation coil positioned adjacent to the magnet assembly and operable for generating a magnetic field to compensate for leakage fields. A system for eliminating image distortion in magnetic resonance imaging comprising a magnet assembly comprising an imaging gradient coil and an imaging volume, and at least one gradient compensation coil positioned adjacent to the magnet assembly operable for generating gradient compensation fields in response to the magnetic field change. A method for counter-acting unwanted fields generated by eddy currents in conducting structures of a magnetic resonance system comprising generating a magnetic field change signal indicative of a change in a magnetic field of an imaging volume, determining a compensation signal in response to the magnetic field change signal, adding at least one gradient compensation coil to the magnetic resonance imaging system, and controlling current through the at least one gradient compensation coil.

    摘要翻译： 一种梯度补偿系统，包括磁体组件，至少一个场产生梯度线圈，其可操作用于产生三个正交坐标中的磁场梯度，以及至少一个梯度补偿线圈，所述至少一个梯度补偿线圈位于与所述磁体组件相邻并且可操作以产生磁场以补偿 用于泄漏场。 一种用于消除磁共振成像中的图像失真的系统，包括包括成像梯度线圈和成像体积的磁体组件，以及至少一个位于磁体组件附近的梯度补偿线圈，其可操作用于响应于磁场变化产生梯度补偿场 。 一种用于在磁共振系统的导电结构中由涡流产生的反作用不需要的场的方法，包括产生指示成像体积的磁场变化的磁场变化信号，响应于磁场确定补偿信号 改变信号，将至少一个梯度补偿线圈添加到磁共振成像系统，以及控制通过至少一个梯度补偿线圈的电流。