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公开(公告)号：US4562900A
公开(公告)日：1986-01-07
申请号：US684232
申请日：1984-12-20
CPC分类号： G10K11/30
摘要： A lens system for directing and focussing acoustic energy from an array of acoustic transducers on a small target can be made lightweight, low in absorption and dispersion by incorporating plastic Fresnel lenses with prisms into a monolithic tray of the same plastic with one lens for each transducer.
摘要翻译： 用于引导和聚焦来自小目标上的声换能器阵列的声能的透镜系统可以通过将具有棱镜的塑料菲涅尔透镜结合到同一塑料的整体式托盘中，使每个换能器具有一个透镜，从而使其重量轻，吸收和散射低 。
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公开(公告)号：US06794868B1
公开(公告)日：2004-09-21
申请号：US10600292
申请日：2003-06-20
申请人： Wai Ha Wong , Weston A. Anderson
发明人： Wai Ha Wong , Weston A. Anderson
IPC分类号： G01V300
CPC分类号： G01R33/3875 , G01R33/30 , G01R33/3415
摘要： A method of optimizing effects of a shim system on static magnetic field in an imaging system or liquid spectroscopy system, wherein for each cell of a probe disposed within the magnetic field, the resonant frequency is obtained without any current being supplied to any shim coil, then for each cell, the resonant frequency thereof is obtained by a current being supplied to one shim without any current being supplied to the other shims, and a factor is obtained for each cell due only to the magnetic field produced by current supplied to the one shim, and the resulting difference divided by the current supplied to the shim is obtained for each cell for each separate shim current, from the data an equation is derived relating the field at each cell to the individual shim current. For the case when the number of cells is equal to or less than the number of shim coils, this equation is inverted to give the shim current values to produce the same field at all cells. For the case when the number of cells is greater than the number of shim coils, a least square method is applied utilizing the equation and matrix factors to determine the current values which produce the least errors in the cells.
摘要翻译： 一种在成像系统或液体光谱系统中优化垫片系统对静态磁场的影响的方法，其中对于设置在磁场内的探针的每个单元，获得谐振频率，而没有任何电流被提供给任何垫片线圈， 那么对于每个单元，其谐振频率通过将电流提供给一个垫片而获得，而没有任何电流被提供给另一个垫片，并且由于仅由提供给该电流器的电流产生的磁场而获得每个电池的因子 并且根据从每个单元格的场到单独的垫片电流的等式得出的数据，获得针对每个单独的每个单独的垫片电流而得到的差异除以提供给垫片的电流。 对于单元数等于或小于垫片数量的情况，该方程被反转以给出在所有单元处产生相同场的垫片电流值。 对于单元数量大于垫片数量的情况，使用方程式和矩阵因子来应用最小二乘法来确定在单元格中产生最小误差的当前值。
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公开(公告)号：US06420871B1
公开(公告)日：2002-07-16
申请号：US09798322
申请日：2001-03-02
申请人： Wai Ha Wong , Seiji Unno , Weston A. Anderson
发明人： Wai Ha Wong , Seiji Unno , Weston A. Anderson
IPC分类号： G01V300
CPC分类号： G01R33/34046 , G01R33/34007 , G01R33/3635
摘要： A multiple tuned birdcage coil structure has a plurality of birdcage coils arranged coaxially one inside another around a central axis. Each of the birdcage coils has two conductor rings separated along the central axis and a plurality of mutually separated and parallel linearly elongated conductor legs and generates B1 field which rotates around the central axis by a specified twist angle between the two rings. The twist angles of different ones of these birdcage coils are different by an integral multiple of 360 degrees such that the assembled birdcage coils are mutually inductively transparent. Such a multiple tuned birdcage coil structure may be formed by assembling individually prepared single tuned birdcage coils each having a specified twist angle with a cylindrically shaped insulating bodies in between. A double tuned birdcage coil structure with two birdcage coils may be produced by providing a single printed circuit substrate with metallic sheets laminated on an insulating sheet, etching the metallic sheets to form appropriate patterns, rolling the substrate into a cylindrical form and soldering together appropriate portions of ring-forming parts to form conductor rings directly connected to or capacitively coupled to spirally birdcage legs.
摘要翻译： 多重调谐鸟笼线圈结构具有多个围绕中心轴线同轴地布置的鸟笼线圈。 每个鸟笼线圈具有沿着中心轴线分离的两个导体环和多个相互分离和平行的线状细长的导体腿，并且产生围绕中心轴旋转两个环之间的指定扭转角的B1场。 这些鸟笼线圈的不同扭转角度与360度的整数倍不同，使得组装的鸟笼线圈相互感应透明。 这种多重调谐鸟笼线圈结构可以通过将各自具有指定扭转角的单独调谐的鸟笼线圈与其间的圆柱形绝缘体组装而形成。 具有两个鸟笼线圈的双调谐鸟笼线圈结构可以通过提供单个印刷电路基板来制造，该金属片层压在绝缘片上，蚀刻金属片以形成适当的图案，将基底滚动成圆柱形并将适当部分焊接在一起 的环形部件以形成直接连接到或电容耦合到螺旋状鸟笼腿的导体环。
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公开(公告)号：US06323647B1
公开(公告)日：2001-11-27
申请号：US09397366
申请日：1999-09-16
IPC分类号： G01V300
CPC分类号： G01R33/3628
摘要： An apparatus for tuning and/or matching a RF coil in a NMR probe comprising a first variable capacitor electrically connected to the coil and a first motor capable of coupling to the first variable capacitor. The first motor when coupled to the first capacitor adjusts a capacitance associated with the first capacitor. The first motor is capable of operating in a strong magnetic field and is capable of not disturbing homogeneity of said magnetic field when said motor is not operating. The apparatus may further include a second variable capacitor and a second motor. The first motor is further capable of coupling to the second capacitor for adjusting a capacitance associated with the second capacitor. The second motor moves the first motor between coupling with the first capacitor and coupling with the second capacitor. The mechanism may be employed to manipulate variable inductive loads for tuning and/or matching.
摘要翻译： 一种用于调谐和/或匹配NMR探针中的RF线圈的装置，包括电连接到线圈的第一可变电容器和能够耦合到第一可变电容器的第一电机。 耦合到第一电容器的第一电动机调节与第一电容器相关联的电容。 第一电动机能够在强磁场中操作，并且当所述电动机不工作时能够不干扰所述磁场的均匀性。 该装置还可以包括第二可变电容器和第二电动机。 第一电动机还能够耦合到第二电容器，用于调节与第二电容器相关联的电容。 第二电动机使第一电动机与第一电容器耦合并与第二电容器耦合。 该机构可用于操纵用于调谐和/或匹配的可变感应负载。
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公开(公告)号：US5552709A
公开(公告)日：1996-09-03
申请号：US544222
申请日：1995-10-17
申请人： Weston A. Anderson
发明人： Weston A. Anderson
摘要： The present invention relates to improving the sensitivity of an NMR system for electrically conductive (polar) NMR samples. Many NMR samples use water or a salt solution of water or other electrically conductive liquid as a solvent for biologically active materials. When such a sample is placed in the probe coil of an NMR spectrometer, electrical losses in the conductive material lowers the Q of the receiving circuit and thereby reduces the sensitivity of the spectrometer. These electrical losses can be greatly reduced by breaking up the current paths within the sample. This can be achieved by a special sample cell that compartmentalizes the sample with electrical insulating material reducing the electrical current paths.
摘要翻译： 本发明涉及提高NMR系统对导电（极性）NMR样品的灵敏度。 许多NMR样品使用水或其他导电液体的盐溶液作为生物活性物质的溶剂。 当将这样的样品放置在NMR光谱仪的探针线圈中时，导电材料中的电损耗降低了接收电路的Q，从而降低了光谱仪的灵敏度。 通过破碎样品中的电流路径可以大大减少这些电损耗。 这可以通过一种特殊的样品池实现，该样品池用电绝缘材料分隔样品，减少电流路径。
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公开(公告)号：US5001682A
公开(公告)日：1991-03-19
申请号：US523336
申请日：1990-05-14
申请人： Weston A. Anderson
发明人： Weston A. Anderson
摘要： A seismographic sensor is constructed from a D'Arsonval movement. The elements of the movement include a coil suspended in the field of a permanent magnet and a pointer attached to the coil. A weight is attached to the pointer and acts as an inertia element. Leveling screws are provided to control the period of the weighted pointer and to control the resting position of the pointer. When the base of the meter vibrates during an earthquake, the weighted pointer does not follow the vibration because of its inertia, resulting in a relative rotation of the meter coil and the magnet field, thereby inducing a voltage in the coil. This voltage is proportional to one component of horizontal velocity of the earth's motion. Means are provided to process and record the magnitude of this voltage.
摘要翻译： 地震传感器由D'Arsonval运动构成。 运动元件包括悬挂在永久磁铁领域中的线圈和附接到线圈的指针。 重量附着在指针上，并作为惯性元件。 提供调平螺丝以控制加权指针的周期并控制指针的静止位置。 当仪表的基座在地震期间振动时，加权指针由于其惯性而不跟随振动，导致测量线圈和磁场的相对旋转，从而在线圈中产生电压。 该电压与地球运动的水平速度的一个分量成比例。 提供装置来处理和记录该电压的大小。
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公开(公告)号：US4821305A
公开(公告)日：1989-04-11
申请号：US207005
申请日：1988-06-09
申请人： Weston A. Anderson
发明人： Weston A. Anderson
CPC分类号： H01J35/24 , H01J35/065 , H01J35/12 , H01J35/16 , H01J2235/162
摘要： The average power capacity of a rotating-anode X-ray generator tube is limited by the slow radiation cooling of the anode. The invention removes this limitation by rotating the entire vacuum envelope so the heat can be conducted directly to the air or to a circulating liquid. The cathode and anode are made as figures of revolution about the axis. A stationary source of X-rays is produced by focusing a stationary spot of the light onto a rotating photocathode. The photoelectrons are drawn off and focused onto a stationary spot on the rotating anode, to produce a stationary source of X-rays.
摘要翻译： 旋转阳极X射线发生器管的平均功率容量受到阳极缓慢辐射冷却的限制。 本发明通过旋转整个真空外壳来消除这种限制，使得热量可以直接传导到空气或循环液体。 阴极和阳极被制成围绕轴的旋转图。 通过将光的固定点聚焦到旋转的光电阴极上来产生固定的X射线源。 光电子被抽出并聚焦到旋转阳极上的固定点上，产生固定的X射线源。
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公开(公告)号：US4788705A
公开(公告)日：1988-11-29
申请号：US5973
申请日：1987-01-21
申请人： Weston A. Anderson
发明人： Weston A. Anderson
CPC分类号： H01J35/12 , H01J35/04 , H01J35/16 , H01J35/24 , H01J2235/162
摘要： A high-intensity X-ray source generates significant heat at the anode. To help dissipate this heat, the anode is often rotated in the vacuum. Heat must still be radiated from the anode to the exterior walls. An improved X-ray source incorporates the anode in the walls of the vacuum chamber and rotates the entire chamber. The heat is then easily conducted to the exterior where it may be dissipated by connection or forced air cooling.
摘要翻译： 高强度X射线源在阳极产生显着的热量。 为了帮助消散这种热量，阳极常常在真空中旋转。 仍然必须将热量从阳极辐射到外壁。 改进的X射线源将阳极并入真空室的壁中并使整个腔室旋转。 然后将热量容易地传导到外部，其中可以通过连接或强制空气冷却而消散。
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公开(公告)号：US4406626A
公开(公告)日：1983-09-27
申请号：US362666
申请日：1982-03-29
摘要： An electronic teaching aid which enables a student viewing a visual display containing text material being read or studied to designate any words or portion of said text for immediate audible vocalization or alternatively to designate any word of said test for immediate visual display of the definition of said designated word.
摘要翻译： 一种电子教学辅助装置，其使得学生能够观看包含正在阅读或研究的文本材料的视觉显示器，以指定所述文本的任何单词或部分以立即发出声音，或者替代地指定所述测试的任何单词以立即可视地显示所述 指定字
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公开(公告)号：US4341120A
公开(公告)日：1982-07-27
申请号：US92903
申请日：1979-11-09
申请人： Weston A. Anderson
发明人： Weston A. Anderson
CPC分类号： A61B8/4209 , A61B8/00 , G01S7/5206 , G10K11/352 , Y10S128/916
摘要： An improvement in an ultrasonic imaging system is disclosed, enabling determination of volume and/or shape of three-dimensional portions of bodily tissue or the like. The improvement is applicable to ultrasonic imaging systems of the type adapted for examining bodily tissue, especially those including sector scanning transducer means, such as electronically scanned phased arrays or mechanically scanned transducers; means for phasing the actuation of said transducers to steer the emitted sound beam in a plurality of radial directions in a fan-shaped sector; means for receiving the reflected energy from the plurality of radial directions in the sector; means for determining from the reflected energy the acoustical impedance variations within the bodily tissue examined along the radial directions and providing therefrom a reconstructed image of the fan-shaped planar cross-section of bodily tissue examined; and a transducer body for carrying said array of elements, said body having an axis aligned with the plane of said fan-shaped sector and approximately symmetrically dividing the included angle of said fan, the body being orientable with respect to the bodily tissue being examined to enable the fan-shaped sector to intersect and thereby effect imaging of a desired cross-section of said tissue. The improvement enables evaluation of the volume or shape of a three-dimensional portion of the tissue being examined, and comprises means for determining the rotational angle between a reference position and a plurality of selected examining positions of the transducer body, upon the transducer body being rotated from its reference to the selected examining positions while at least one point on the body axis remains substantially spatially fixed; and means for correlating the associated reconstructed images with the said determined angles, whereby to generate a plurality of cross-sectional images of said three-dimensional tissue portion being examined, wherein the imaged tissue cross-sections include at least one common point, thereby to enable evaluation of the volume or shape of the three-dimensional tissue portion of interest.
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