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143 条记录 (耗时 0.014 秒)

    Micromagnetization analytical program and apparatus
    71.
    发明申请
    Micromagnetization analytical program and apparatus 失效
    微磁化分析程序和仪器

    公开(公告)号：US20050075818A1

    公开(公告)日：2005-04-07

    申请号：US10790208

    申请日：2004-03-02

    申请人： Koichi Shimizu

    发明人： Koichi Shimizu

    IPC分类号： G06F17/13 ,  G01R33/12 ,  G06F19/00

    CPC分类号： G01R33/1215

    摘要： The precision of a micromagnetization analysis is improved. Parameters of the micromagnetization assigned to the center of a divided microelement and the vector potential assigned to a side or a node of the element are received in procedure 1. A magnetic field equation which supplies an external magnetic field for micromagnetization is generated in procedure 2. A solution of the magnetic field equation is obtained in display 3. A time integral of a LLG equation is obtained using the solution in procedure 4. It is determined in procedure 5 whether or not the micromagnetization obtained in procedure 4 satisfies a convergence condition. When it is not satisfied, a magnetic field equation is corrected and a time is stepwise increased in procedure 6, and the procedures in and after procedure 3 are repeated.

    摘要翻译： 提高了微磁化分析的精度。 在步骤1中接收分配给分割的微元件的中心的微磁化参数和分配给元件的侧面或节点的矢量电势。在步骤2中产生提供用于微磁化的外部磁场的磁场方程。 在显示器3中获得磁场方程的解。使用步骤4中的解来获得LLG方程的时间积分。在步骤5中确定在步骤4中获得的微磁化是否满足收敛条件。 当不满足时，在步骤6中校正磁场方程并逐步增加时间，并且重复步骤3中和之后的步骤。

    Apparatus for measuring electromagnetic characteristics
    72.
    发明申请
    Apparatus for measuring electromagnetic characteristics 有权
    用于测量电磁特性的装置

    公开(公告)号：US20030122543A1

    公开(公告)日：2003-07-03

    申请号：US10298651

    申请日：2002-11-19

    申请人： National Inst. of Advanced Ind. Science and Tech.

    发明人： Naoki Shirakawa ,  Shinichi Ikeda

    IPC分类号： G01R033/035 ,  G01R033/02

    CPC分类号： G01R33/02 ,  G01R33/1215 ,  Y10S505/846

    摘要： An apparatus for measuring electromagnetic characteristics includes a sample rod with a sample fixed to a lower part thereof, a helium 3 refrigerator, in which the sample rod is inserted, having a main pipe that forms around the sample rod a space that is cooled by helium 3, a device for supplying helium 3 to the helium 3 refrigerator, an inner tube portion, into which the main pipe is inserted, that supports at an upper part thereof the refrigerator, an outer tube that cools an outer periphery of the inner tube with helium, a liquid helium container that supplies liquid helium to the outer tube, and a device for measuring the electromagnetic characteristics of the sample.

    摘要翻译： 一种用于测量电磁特性的装置包括：样品杆，其样品固定在其下部，氦3制冷器，其中插入样品棒，具有在试样棒周围形成空间的主管，该空间被氦冷却 3，用于向氦3制冷机供给氦3的装置，将主管插入其内部的内管部，在其上部支撑着冰箱，将内管的外周冷却的外管， 氦气，向外管供应液氦的液氦容器，以及用于测量样品的电磁特性的装置。

    Electromechanical drive for magnetometers
    73.
    发明申请
    Electromechanical drive for magnetometers 有权
    磁力计的机电驱动

    公开(公告)号：US20030038627A1

    公开(公告)日：2003-02-27

    申请号：US10098383

    申请日：2002-03-18

    发明人： John Krause ,  Jefferey Lindemuth ,  Edward Maloof ,  David Plaga

    IPC分类号： G01N027/72

    CPC分类号： G01R33/1215

    摘要： 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.

    摘要翻译： 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。

    Magnetometer for measuring the magnetic moment of a specimen
    74.
    发明授权
    Magnetometer for measuring the magnetic moment of a specimen 失效
    用于测量样品磁矩的磁力计

    公开(公告)号：US5001426A

    公开(公告)日：1991-03-19

    申请号：US381655

    申请日：1989-06-08

    申请人： Thomas Frey ,  Wolfgang Jantz ,  Rudolf Stibal

    发明人： Thomas Frey ,  Wolfgang Jantz ,  Rudolf Stibal

    IPC分类号： G01N27/72 ,  G01R33/12

    CPC分类号： G01R33/1215

    摘要： In a magnetometer with an inhomogeneous magnetic field which timewise changes in its intensity periodically and acts upon the specimen to be measured, the latter being attached to the free end of a tongue (8) that can be oscillated and whose oscillations can be determined by piezo elements (12, 13), there occurs a compensation of the magnetic moment of the specimen with the aid of a compensating current loop (33). The current required for arresting the oscillations is a measure of the magnetic moment to be determined. An adaptation to the resonance frequency of the oscillating tongue (8) is effected through a frequency control cirucit (22, 28, 6), making it possible to measure large temperature ranges at great sensitivity and contingent on temperature.

    摘要翻译： PCT No.PCT / DE88 / 00532 Sec。 371日期：1989年6月8日 102（e）日期1989年6月8日PCT提交1988年8月31日PCT公布。 出版物WO89 / 03535 日期为1989年4月20日。在具有不均匀磁场的磁力计中，其周期性地时间性地改变其强度并作用于待测量的样品，后者附着到可以振荡的舌（8）的自由端， 其振荡可以由压电元件（12,13）确定，借助于补偿电流回路（33）就会发生样本的磁矩的补偿。 阻止振荡所需的电流是要确定的磁矩的量度。 通过频率控制电路（22,28,6）实现对振荡舌（8）的共振频率的适应，使得可以以很高的灵敏度并且取决于温度来测量大的温度范围。

    Magnetizing system
    76.
    发明授权
    Magnetizing system 失效
    磁化系统

    公开(公告)号：US4359765A

    公开(公告)日：1982-11-16

    申请号：US205595

    申请日：1980-11-10

    申请人： Katsura Mimura ,  Kazuo Tsugawa

    发明人： Katsura Mimura ,  Kazuo Tsugawa

    IPC分类号： G01R33/12 ,  H01F13/00

    CPC分类号： H01F13/003 ,  G01R33/1215

    摘要： A magnetizing system including a FLIP-FLOP and an integrating circuit operative to control a conduction phase of a unidirectional thyristor through a gating circuit so as to supply to an iron-core coil an increasing magnetizing current from an AC source through the thyristor so as to magnetize a horseshoe steel member. When a comparator determines that the magnetization amount of the steel member, sensed by a Hall effect element, equals 1.2 to 1.3 times a reference amount, the magnetizing current is stopped. Similar components for effecting demagnetization are then operated in the same manner so as to demagnetize the steel member with an increasing unidirectional current opposite in sense to the magnetizing current or an increasing bidirectional current until the sensed magnetization amount equals the reference amount. At that time, the demagnetizing current is stopped.

    摘要翻译： 一种包括FLIP-FLOP和积分电路的磁化系统，其操作用于通过门控电路控制单向晶闸管的导通相位，以便向铁芯线圈提供从AC源通过晶闸管的增加的磁化电流，从而 磁化马蹄钢构件。 当比较器确定由霍尔效应元件检测到的钢构件的磁化量等于参考量的1.2至1.3倍时，磁化电流停止。 然后以相同的方式操作用于进行退磁的类似部件，以便以与励磁电流或增加的双向电流相反的增加的单向电流使钢构件退磁，直到感测到的磁化量等于参考量。 此时，退磁电流停止。

    Alternating force magnetometer
    77.
    发明授权
    Alternating force magnetometer 失效
    交替力磁力计

    公开(公告)号：US3904956A

    公开(公告)日：1975-09-09

    申请号：US33545373

    申请日：1973-02-26

    申请人： BRIEN KEVIN C O ,  REASENBERG ROBERT D

    发明人： O'BRIEN KEVIN C ,  REASENBERG ROBERT D

    IPC分类号： G01R33/12

    CPC分类号： G01R33/1215

    摘要： A magnetometer is disclosed in which a first coil provides a uniform magnetic field in a measuring region while a second coil provides a field gradient in the same region in the same direction. Each of the coils can be selectively driven by either a D.C. current source or an A.C. signal generator. A sample is suspended in the measuring region while currents are applied to both coils. At least one of the coils has A.C. current applied thereto. The A.C. force on the sample is measured to provide a measurement of magnetic properties of the sample. A magnet mounted for rotation can provide a third field perpendicular to the predetermined direction to affect the sample without interacting with the other two magnetic fields.

    摘要翻译： 公开了一种磁力计，其中第一线圈在测量区域中提供均匀的磁场，而第二线圈在同一方向上在同一区域提供场梯度。 每个线圈可以由直流电流源或交流信号发生器选择性地驱动。 将样品悬挂在测量区域，同时向两个线圈施加电流。 至少一个线圈具有施加于其上的交流电流。 测量样品上的A.C.力以提供样品的磁性能的测量。 安装用于旋转的磁体可以提供垂直于预定方向的第三场，以影响样本而不与另外两个磁场相互作用。

    Determination of the orientation of magnetism in a sample of material
    78.
    发明授权
    Determination of the orientation of magnetism in a sample of material 失效
    确定材料样品中磁性的方位

    公开(公告)号：US3820012A

    公开(公告)日：1974-06-25

    申请号：US24360472

    申请日：1972-04-13

    申请人： MOLYNEUX L

    发明人： MOLYNEUX L

    IPC分类号： G01R33/12 ,  G01V3/08 ,  G01N27/00

    CPC分类号： G01R33/1215

    摘要： A magnetic orientation estimator has flux sensitive magnetic pick-up heads carried around a sample locator. The locator preferably has a cube shaped rock sample holder, carried on a rotor which also carries a revolution detection means for indicating when a complete revolution of the sample is achieved and a series of position detection means for indicating predetermined angular increments of each of the samples. An analogue to digital converter is electrically connected to the pick-up heads for use with a computer. The computer is programmed to receive and store the digital information from the analogue to digital converter in a series of locations in a memory bank each corresponding to one of the predetermined angular positions. For each revolution the digital information for each angular position is added to the previously stored information in that memory location. The position detection means may comprise a series of slots in a disc carried on the rotor in cooperation with a photoelectric sensor. The revolution detection means may comprise a single slot on the same disc radially spaced from the series of slots and cooperating with a further photoelectric sensor. The computer is preferably programmed to analyze the wave form represented by the digital information and to store the results of the analysis in a further memory location. This procedure can be repeated for various positions of the sample and the results of each procedure can be combined to produce the final results.