公开(公告)号：EP0435652A3

公开(公告)日：1992-09-09

申请号：EP90314253.7

申请日：1990-12-24

申请人： FUJITSU LIMITED

发明人： Fujimaki, Norio

IPC分类号： G01R33/035 ,  G01R33/00 ,  G01R33/022

CPC分类号： G01R33/0356 ,  Y10S505/846

摘要： A multi-channel superconducting quantum interference magnetometer comprises a cooling vessel (100), a plurality of superconducting quantum interference magnetometers corresponding to a plurality of channels, each of the superconducting quantum interference magnetometers being accommodated in said cooling vessel and including a superconducting detection loop (31a, 31b, 32, 33) for interlinking with the unknown magnetic flux, a superconducting magnetic sensor (21a - 21n) coupled magnetically to the superconducting detection loop for producing an output voltage pulse, a feedback circuit (22a - 22n) supplied with the output voltage pulse from the superconducting magnetic sensor for producing a magnetic flux that counteracts the unknown magnetic flux in response to each output voltage pulse, and a gate circuit (23a - 23n) provided between the superconducting magnetic sensor and the feedback means for controlling the supplying of the output voltage pulse from the superconducting magnetic sensor to the feedback means, wherein the gate circuit is supplied with a control signal and selectively passes the output voltage pulse in response to a logic level of the control signal. Further, the multi-channel quantum interference magnetometer comprises a selection circuit (30) provided in the cooling vessel for providing the control signal selectively to the gate circuit in response to a selection signal supplied thereto.

公开(公告)号：EP0492263A1

公开(公告)日：1992-07-01

申请号：EP91121131.6

申请日：1991-12-10

申请人： NEUROMAG LTD

发明人： Ahonen, Antti Ilmari ,  Knuutila, Jukka Erkki Tapani ,  Simola, Juha Tapani Antero ,  Vilkman, Visa Antero

IPC分类号： A61B5/04

CPC分类号： A61B5/04008 ,  Y10S505/846

摘要： The invention relates to a sensor element made of thin film components and fiber glass, and a support structure (7) made of fiber glass; when the sensor elements are attached to the support structure (7), a sensor system suitable for magnetoencephalographic measurements is formed. A substrate containing a planar signal coil and a SQUID is attached on a circuit board made of fiber glass using a spring cut on the edge of the body plate. On the sensor element, there is a small but mechanically stable connector or several such connectors (5); when the sensor element is plugged in the receptacles (6) on the support structure (7), the element settles in a well defined orientation. The support structure (7) is made of a fiber glass shell following the shape of the bottom (10) dewar vessel, adapted to the shape of the head. The receptacles (6) are attached to the glass fiber shell by means of springs (9) made of thin fiber glass plate in such a way that an array covering the whole skull as evenly as possible is formed when the sensor elements are plugged to the receptacles (6). The spring is cut in a way to enable rotation only around an arbitrary axis in the plane of the spring and a translation only in a direction perpendicular to the plane of the spring. When this support structure is inserted in the dewar, the individual sensor elements lean against the dewar bottom (10) by aid of three feet (11), pressed by springs (9), settling perpendicularly to the normal of the dewar bottom passing through the center of the sensor element.

摘要翻译： 本发明涉及由薄膜部件和玻璃纤维制成的传感器元件和由玻璃纤维制成的支撑结构（7）。 当传感器元件附接到支撑结构（7）时，形成适合于脑电图测量的传感器系统。 含有平面信号线圈和SQUID的基板使用在本体板的边缘上的弹簧切割而附着在由玻璃纤维制成的电路板上。 在传感器元件上，有一个小但机械稳定的连接器或几个这样的连接器（5）; 当传感器元件插入到支撑结构（7）上的插座（6）中时，元件以良好限定的方向沉降。 支撑结构（7）由符合头部形状的底部（10）杜瓦瓶形状的玻璃纤维外壳制成。 容器（6）通过由薄玻璃纤维板制成的弹簧（9）附接到玻璃纤维外壳，使得当传感器元件被堵塞到盖子上时，形成尽可能均匀地覆盖整个颅骨的阵列 容器（6）。 弹簧的切割方式仅能够在弹簧的平面中的任意轴线周围旋转，并且仅在垂直于弹簧的平面的方向上进行平移。 当该支撑结构被插入杜瓦瓶中时，各个传感器元件借助于由弹簧（9）按压的三个脚（11）而靠在杜瓦瓶底部10上，垂直于通过该杜瓦瓶底部的杜瓦瓶底部的法线沉降 传感器元件的中心。

公开(公告)号：EP0481211A2

公开(公告)日：1992-04-22

申请号：EP91115244.5

申请日：1991-09-10

申请人： International Business Machines Corporation

发明人： Koch, Roger H.

IPC分类号： G01R33/022

CPC分类号： G01R33/022 ,  Y10S505/846

摘要： A gradiometer utilizing at least three vector magnetometers (11, 12, 13) (preferably SQUIDs) to measure a magnetic field gradient. An average magnetometer (13) (SQUID) is used to cancel background magnetic fields from outputs of the difference magnetometers (11, 12) via a feedback loop (21, 22, 23) provided with a signal from the average magnetometer (13). Similarly, higher order gradiometers can be built using an average magnetometer cube and a plurality of difference magnetometer cubes. The gradiometer would find application in a wide range of fields, such as geology and medecine.

摘要翻译： 利用至少三个矢量磁强计（11,12,13）（优选SQUID）来测量磁场梯度的梯度计。 平均磁力计（13）（SQUID）用于通过设置有来自平均磁力计（13）的信号的反馈回路（21,22,23）来消除来自差分磁强计（11,12）的输出的背景磁场。 类似地，可以使用平均磁强计立方体和多个不同的磁力计立方体来构建高阶梯度计。 梯度计可以在广泛的领域得到应用，如地质学和医学。

公开(公告)号：EP0474229A2

公开(公告)日：1992-03-11

申请号：EP91115008.4

申请日：1991-09-05

申请人： DAIKIN INDUSTRIES, LIMITED

发明人： Ueda, Tomoaki

IPC分类号： A61B5/04 ,  G06F17/10 ,  G01R33/10 ,  G01R33/035

CPC分类号： G01R33/10 ,  G01R33/035 ,  Y10S505/846

摘要： A plurality of magnetic flux measurement data corresponding to two dimensional grids are obtained, then the magnetic flux measurement data are convoluted to sampling unit functions in x-direction and y-direction to obtain an interpolation function. Magnetic field is illustrated by isomagnetic contour lines based on magnetic flux measurement data and interpolation values which are obtained based on the interpolation function. One of the sampling unit functions is replaced with a differential function thereof to obtain partial differential values of arbitrary points.

摘要翻译： 磁通量测量数据对应于二维网格的多个获得，则磁通量的测量数据进行卷积，以在x方向和y方向上，以获得在插值函数采样单元的功能。 磁场是由基于所述插值函数即制得基于磁通量测量数据和插补值等磁轮廓线示出。 之一的采样单元的功能与一个微分函数替换它们，以获得任意点的偏微分值。

公开(公告)号：EP0413388A3

公开(公告)日：1992-02-19

申请号：EP90202174.0

申请日：1990-08-10

申请人： Philips Patentverwaltung GmbH ,  Philips Electronics N.V.

发明人： Lüdeke, Kai-Michael

IPC分类号： G01R33/035

CPC分类号： G01R33/0354 ,  Y10S505/846

摘要： Verfahren zum Unterdrücken von Stromverteilungsrauschen in einem Gleichstrom-SQUID, mit zwei in einer supraleitenden Schleife (11) angeordnete Josephson-Kontakten (12). Dieses Stromverteilungsrauschen entsteht durch individuelle Schwankungen der kritischen Ströme der beiden Josephson-­Kontakte, welche zur Messung von schwachen Magnetfeldern verwandt werden. Das SQUID ist mit einer Vorrichtung verbunden, die eine Steuereinrichtung (14) zur Erzeugung eines periodischen Vorspannstromes (I B ), eine Modulationseinrichtung (15) zur Erzeugung einer Fluß­modulation über einen induzierten Wechselstrom in der Schleife (11) und einer Signaldetektionseinrichtung (17) zur Bildung einer mittleren Ausgangsspannung (V ges ) enthält. Der Vorspannstrom (I B ) wird über die Steuer­einrichtung (14) mit der Modulationsfrequenz und einem Zeitversatz von einem Viertel der Periodendauer der Modulationsfrequenz umgepolt, wodurch der SQUID verschiedene Vorspannzustände durchläuft. Bei geeignet bewerteter Signaldetektion in der Signaldetektions­einrichtung (17) heben sich in der Signalsumme über vier Vorspannzustände die aus Schwankungen der kritischen Ströme resultierenden Stromverteilungsrauschsignale gegenseitig auf.

公开(公告)号：EP0399499A3

公开(公告)日：1991-06-05

申请号：EP90109809.5

申请日：1990-05-23

申请人： HITACHI, LTD.

发明人： Yokosawa, Koichi, Hitachi Daiyon Kyoshinryo ,  Nakane, Hideaki

IPC分类号： G01R33/035

CPC分类号： G01R33/0358 ,  Y10S505/846

摘要： A pickup coil (1) and a planar type SQUID (3; 7, 8, 9) are formed integrally on a single substrate (5) to form a SQUID magnetometer (51). The SQUID is disposed on the surface of a projecting portion (5-1) of the substrate and an insulating layer (20) for spacing is laminated on the SQUID. The top, bottom and side surfaces of the assembly of the SQUID and insulating layer covering the same are all covered with a superconducting layer to form a magnetic shield (30) for enclosing the SQUID. The magnetic shield is remote from the planar type pickup coil disposed on the remaining portion of the substrate by a distance (L2) which is equal to or greater than a length (L1) of one side of the size of the magnetic shield, thereby preventing magnetic flux distortion due to the presence of the magnetic shield from disturbing coil balance of the pickup coil.

公开(公告)号：EP0363658A1

公开(公告)日：1990-04-18

申请号：EP89116776.9

申请日：1989-09-11

申请人： SIEMENS AKTIENGESELLSCHAFT

发明人： Seifert, Heinrich, Dr.

IPC分类号： G01R33/022

CPC分类号： G01R33/0358 ,  Y10S505/846

摘要： Das Gradiometerschleifensystem ist für eine Einrichtung zur mehrkanaligen Messung sehr schwacher Magnetfelder vorgesehen, wobei die zu mindestens einem Array zusammengefaßten supralei­tenden Gradiometerschleifen auf einem Trägerkörper angeordnet und ebenso wie an sie anzuschließende supraleitende Verbin­dungsleiter als Dünnfilmstrukturen ausgebildet sind. Erfin­dungsgemäß sollen die Gradiometerschleifen (S1) auf den beiden Flachseiten (2) einer Trägerfolie (3) so verteilt angeordnet sein, daß sie gemeinsam eine zumindest annähernd geschlossene Arrayfläche (F) einnehmen und sollen die Verbindungsleiter (7a, 7b) im Bereich der Arrayfläche (F) so verlaufend ausgebildet sein, daß sie zumindest weitgehend von jeweils auf der gegen­überliegenden Flachseite der Trägerfolie (3) befindlichen Lei­terbahnen von Gradiometerschleifen abgeschirmt sind.

摘要翻译： 梯度计回路系统用于非常弱的磁场的多通道测量的设备; 在这种情况下，组合到至少一个阵列中的超导梯度计回路设置在载体上，并且与要连接的超导连接线一样被设计为薄膜结构。 根据本发明，载体箔（3）的两个平坦侧面（2）上的梯度计环（S1）将被布置成具有共同占据至少近似闭合的阵列表面（F）的分布，并且 在阵列表面（F）的区域中的连接线（7a，7b）将被设计成具有这样的进展，使得它们至少在大大程度上从位于每个情况下的梯度计环路导电轨迹上被屏蔽 载体箔（3）的相对的平坦侧。 ... ...

公开(公告)号：EP0222470A3

公开(公告)日：1989-11-08

申请号：EP86306033.1

申请日：1986-08-05

申请人： TRW INC.

发明人： Silver, Arnold Herbert

IPC分类号： H03M1/34 ,  G01R33/035

CPC分类号： G01R33/0356 ,  H03M1/48 ,  Y10S505/846

摘要： A device for use as an analog-to-digital converter or a digital magnetometer using a double-junction superconducting quantum interference device (SQUID) and having an extremely fine sensitivity, but a large dynamic range and the ability to handle rapid signal slew rates. The SQUID receives a composite signal, including the analog signal, a correction signal, and a high-frequency dither signal, the latter being selected to produce two output pulses from the SQUID when operated at a quiescent operating point. Departure from the operating point is detected by monitoring the SQUID output pulses and controlling a feedback register to record the degree of movement from the operating point. The feedback register provides the less significant bits of digital output from the converter. The value stored in the feedback register is also converted to analog form and fed back to the SQUID as the correction signal, thereby locking the device onto the desired operating point. Rapid or slow movement equivalent to more than one flux quantum is also detected in the device, and is recorded in an integer register, which provides the more significant bits of the digital output.

公开(公告)号：EP0147655A3

公开(公告)日：1986-11-26

申请号：EP84114424

申请日：1984-11-30

申请人： International Business Machines Corporation

发明人： Ketchen, Mark Benjamin

IPC分类号： G01R33/16

CPC分类号： G01R33/16 ,  G01R33/0358 ,  Y10S505/846

摘要： A miniature, fully integrated susceptometer capable of measuring the magnetic properties of very small samples (

摘要翻译： 描述了一种能够测量非常小样品（<10μm）的磁性的微型全集成式感受器，其通过在单个芯片上的薄膜光刻制造。 该感受计由直流SQUID（10）组成，该直流SQUID（10）包括两个串联的拾取环（28,30），待测样品可放置在其中。 提供励磁线圈（12），其包括围绕每个SQUID拾取环的单独的单匝（40,42）。 SQUID拾取环路和周围的励磁线圈匝都位于超导地平面（34）中的孔（32）上方。 SQUID拾取回路通过宽的低电感传输线（36,38）连接到位于远处的约瑟夫森隧道结（24,26）。 要检测的信号是在SQUID拾取回路中的一个本地产生的，以提供待测样品与SQUID拾取回路的直接耦合。 提供电阻平衡电路（20），用于检测SQUID的状态的读出电子器件（22）也是如此。

公开(公告)号：EP1478935B1

公开(公告)日：2011-08-31

申请号：EP03723653.6

申请日：2003-02-26

申请人： Cardiomag Imaging

发明人： TRALSHAWALA, Nilesh ,  BAKHAREV, Alexander ,  POLYAKOV, Yuri

IPC分类号： G01R33/02 ,  G01R33/035

CPC分类号： G01R33/0358 ,  G01R33/0354 ,  Y10S505/846

摘要： An instrument for measuring sub-pico Tesla magnetic fields using a superconducting quantum interference device (SQUID) inductively coupled to an unshielded gradiometer includes a filter for filtering magnetically- and electrically coupled radio frequency interference (RFI) away from the SQUID. This RFI is principally coupled to the SQUID via the unshielded gradiometer. In addition, a shielding enclosure is used to electromagnetically shield the filter circuit from the SQUID, and a method is employed to increase the impedance between the input coil and the SQUID without diminishing the overall sensitivity of the instrument.