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    • 2. 发明授权
    • Biomagnetometer with sealed vacuum enclosure and solid conduction cooling
    • 具有密封真空外壳和固体传导冷却的生物计量仪
    • US5494033A
    • 1996-02-27
    • US80876
    • 1993-06-21
    • D. Scott BuchananLaurence WardenScott W. RileyRichard T. JohnsonK. Randy BrimhallKeith A. Esser
    • D. Scott BuchananLaurence WardenScott W. RileyRichard T. JohnsonK. Randy BrimhallKeith A. Esser
    • A61B5/04G01R33/035A61B5/05
    • A61B5/04005G01R33/0358A61B5/0046
    • A biomagnetometer includes a magnetic field sensor including a magnetic field pickup coil and a detector of small electrical currents flowing within the pickup coil. A vacuum-tight enclosure surrounds the sensor. The enclosure has a concavely upwardly curved first wall, with the magnetic field pickup coil located adjacent to the first wall. A vented reservoir of liquefied gas is located within the enclosure, and a solid thermal conductor extends from the sensor. There is a vacuum-tight thermal feedthrough by which the solid thermal conductor passes between the interior and the exterior of the enclosure. Electronic circuitry for filtering and amplifying the signals of the detector is also provided. Such a biomagnetometer is placed below the body of a reclining subject, and a second portion of the biomagnetometer can be placed above the body. In one form, the enclosures are shaped to form a cavity that receives the head of the subject therein, to achieve full head coverage of the pickup coils in the biomagnetometer.
    • 生物计量仪包括磁场传感器,其包括磁场拾取线圈和在拾取线圈内流动的小电流的检测器。 真空密封的外壳围绕传感器。 外壳具有凹入向上弯曲的第一壁,磁场拾取线圈位于第一壁附近。 液化气体排放的储存器位于外壳内,固体导热体从传感器延伸出来。 存在真空密封的馈热通道,固体热导体通过其进入外壳的内部和外部之间。 还提供了用于滤波和放大检测器的信号的电子电路。 这样的生物计量器放置在倾斜对象的身体下方,并且生物计量器的第二部分可以放置在身体上方。 在一种形式中,外壳被成形为形成容纳主体的头部的空腔,以实现生物计量器中的拾取线圈的全头覆盖。
    • 5. 发明授权
    • Magnetically shielded room with internal active magnetic field cancellation, and its use
    • 磁屏蔽室内有主动磁场取消及其使用
    • US06731968B2
    • 2004-05-04
    • US10189092
    • 2002-07-03
    • D. Scott Buchanan
    • D. Scott Buchanan
    • A61B505
    • G01R33/025A61B5/0046A61B5/04005H05K9/0003H05K9/0075
    • An apparatus includes an enclosure having a wall defining an interior of the enclosure and having a layer of a magnetically permeable material disposed such that there is no layer of an electrically conductive material located closer to the interior of the enclosure than the layer of the magnetically permeable material. A background-field magnetometer and an electrical coil structure are positioned within the enclosure. The electrical coil structure is driven by a controllable electrical current source. A background-field-reducing feedback controller has a controller input responsive to a background-field magnetometer output signal, and a controller output in communication with the current source command signal input. A signal magnetometer, such as a biomagnetometer, within the enclosure detects a magnetic field produced by a source within the enclosure. The electrical coil structure operating responsive to the feedback controller reduces the background magnetic field within the enclosure, so that the signal magnetometer may operate in an environment having less interference.
    • 一种装置包括:外壳,其具有限定外壳内部的壁,并且具有一层导磁材料,该层设置成使得不比导磁材料层更靠近外壳的内部的导电材料层 材料。 背景场磁强计和电线圈结构位于外壳内。 电线圈结构由可控电流源驱动。 背景场减小反馈控制器具有响应于背景场磁强计输出信号的控制器输入,以及与电流源指令信号输入通信的控制器输出。 外壳内的信号磁力计,例如生物计量仪,检测由外壳内的源产生的磁场。 响应于反馈控制器操作的电线圈结构减少了外壳内的背景磁场,使得信号磁力计可以在具有较小干扰的环境中工作。