公开(公告)号：EP0280282B1

公开(公告)日：1993-07-28

申请号：EP88102757.7

申请日：1988-02-24

申请人： HITACHI, LTD.

发明人： Nakane, Hideaki ,  Nishino, Toshikazu ,  Hasegawa, Haruhiro

IPC分类号： G01R33/035

CPC分类号： G01R33/0356 ,  Y10S505/846

公开(公告)号：EP0541024A2

公开(公告)日：1993-05-12

申请号：EP92118704.3

申请日：1992-11-01

申请人： SEIKO INSTRUMENTS INC. ,  AGENCY OF INDUSTRIAL SCIENCE AND TECHNOLOGY

发明人： Kiryu, Shogo, c/o Agency of Industry & Technology ,  Shimizu, Nobuhiro ,  Chiba, Norio

IPC分类号： G01R33/035

CPC分类号： G01R33/0356 ,  Y10S505/846

摘要： A magnetic field detecting circuit for measuring weak magnetic field in a high sensitivity. The circuit has a relaxation oscillator in which a coil (3) and a resistor (2) connected in series with each other are connected in parallel with a Josephson device (1), and of a magnetic field input circuit (4) magnetically coupled with the coil of the oscillator circuit for applying the detected magnetic field into the oscillator circuit, whereby oscillation frequency is shifted corresponding to the detected magnetic field. An optimum design of the magnetic field detecting circuit is achieved independently for a parameter of the relaxation oscillator and a parameter of a receiving circuit respectively, and a multi-channelization of the detecting circuit is achieved easier by the structure.

摘要翻译： 一种用于以高灵敏度测量弱磁场的磁场检测电路。 电路具有松弛振荡器，其中线圈和彼此串联连接的电阻器与约瑟夫森装置并联连接，并且与磁场输入电路磁耦合，该磁场输入电路与振荡器电路的线圈磁耦合以施加检测到的磁场 进入振荡电路，由此振荡频率对应于检测到的磁场而偏移。 独立地对松弛振荡器的参数和接收电路的参数实现磁场检测电路的最佳设计，并且通过该结构实现了检测电路的多通道化。

公开(公告)号：EP0436711A4

公开(公告)日：1993-01-07

申请号：EP90912567

申请日：1990-07-30

申请人： BIOMAGNETIC TECHNOLOGIES, INC.

发明人： HINSHAW, WALDO, S. ,  PAULSON, DOUGLAS, N. ,  BUCHANAN, DAVID, SCOTT ,  HIRSCHKOFF, EUGENE, C. ,  DIIORIO, MARK, S. ,  BLACK, WILLIAM, C., JR.

IPC分类号： A61B5/04 ,  A61B5/05 ,  G01R33/035 ,  H01L39/22 ,  H01L39/04

CPC分类号： G01R33/0358 ,  A61B5/04008 ,  Y10S505/846

公开(公告)号：EP0517886A1

公开(公告)日：1992-12-16

申请号：EP92902714.0

申请日：1991-12-20

申请人： BIOMAGNETIC TECHNOLOGIES, INC.

发明人： MARSDEN, James, R.

IPC分类号： A61B5 ,  G01R33 ,  H01L39 ,  H05K9

CPC分类号： G01R33/0354 ,  H01L39/045 ,  Y10S505/846

摘要： Boîtier d'interféromètre quantique comprenant une base d'interféromètre quantique (24) constituée de plusieurs couches et un interféromètre quantique (22) monté sur ladite base. La base d'interféromètre quantique est constituée d'une première couche de substrat (30) réalisée dans un matériau électro-isolant, d'une couche de blindage (28) composée d'un matériau qui est supraconducteur à la température de fonctionnement de l'interféromètre quantique et qui recouvre la première couche de substrat, et d'une deuxième couche de substrat (26) formée dans un matériau électro-isolant, qui recouvre la couche de blindage. Ladite couche de blindage protège l'interféromètre quantique des interférences du courant continu et du courant alternatif, telles que les champs magnétiques et électriques, qui sans cette couche de blindage gêneraient son fonctionnement.

公开(公告)号：EP0501241A2

公开(公告)日：1992-09-02

申请号：EP92102419.6

申请日：1992-02-13

申请人： SEIKO INSTRUMENTS INC.

发明人： Odawara, Akikazu ,  Nakayama, Satoshi ,  Sekiya, Satoshi

IPC分类号： G01R33/035

CPC分类号： G01R33/0356 ,  Y10S505/846

摘要： A highly sensitive magnetic field detecting device using a DC SQUID (14) for detecting a magnetic field to measure the element characteristics of the DC SQUID (14). In the highly sensitive magnetic field detecting device, a feedback modulation circuit (11) is equipped with an external input terminal (114) for inputting a signal from the outside at the time of measuring flux-to-voltage characteristics of the DC SQUID (14). A bias circuit (12) is equipped with an external input terminal (123) for inputting a bias current at the time of measuring current-to-voltage characteristics. An amplifier (15) for amplifying the output of the DC SQUID (14) is equipped at its output with an amplifier output terminal (151).

摘要翻译： 一种使用DC SQUID检测磁场以测量DC SQUID的元件特性的高灵敏度磁场检测装置。 在高灵敏度的磁场检测装置中，反馈调制电路配备有外部输入端子，用于在测量DC SQUID的电流 - 电压特性时从外部输入信号。 偏置电路配备有用于在测量电流 - 电压特性时输入偏置电流的外部输入端子。 用于放大DC SQUID的输出的放大器在其输出端配备有放大器输出端子。

公开(公告)号：EP0435651A3

公开(公告)日：1992-09-02

申请号：EP90314252.9

申请日：1990-12-24

申请人： FUJITSU LIMITED

发明人： Fujimaki, Norio

IPC分类号： G01R33/035

CPC分类号： G01R33/0356 ,  Y10S505/846

摘要： A superconducting quantum interference magnetometer comprises a superconducting pickup coil (111) for interlinking with an unknown magnetic flux and causing to flow an induction current, a superconducting detector (119) of a superconducting quantum interference device coupled magnetically with the superconducting pickup coil for producing output voltage pulses in response to the unknown magnetic flux, a superconducting feedback circuit (118) connected to the superconducting detector for receiving the output voltage pulses therefrom and feeding back a feedback magnetic flux to the superconducting pickup coil in response to each output voltage pulse such that the feedback magnetic flux counteracts the unknown magnetic flux, a resistance fixture (115) provided in the vicinity of the superconducting pickup coil for causing a transition in a part of the superconducting pickup coil a transition from a superconduction state to a normal conduction state in response to the drive current, and a controller (116) connected to the resistance fixture and the superconducting detector for receiving the output pulses therefrom and producing a drive current for energizing the resistance fixture. Simultaneously to the energization of the resistance fixture, the controller resets the feedback circuit such that the counteracting feedback magnetic flux is deenergized.

公开(公告)号：EP0408302A3

公开(公告)日：1992-07-22

申请号：EP90307514.1

申请日：1990-07-10

申请人： FUJITSU LIMITED

发明人： Goto, Takao ,  Igarashi, Yutaka ,  Hayashi, Takehiko

IPC分类号： G01R33/035

CPC分类号： G01R33/0354 ,  Y10S505/846

摘要： In a multi-channel SQUID fluxmeter for detecting magnetic flux signals by use of an array of SQUID flux sensors (1) each comprising a digital SQUID for providing a pulse output, multiplexers (4) and the like are appropriately used to allow pulse signals output from the SQUID flux sensors to be switched on a time series basis in order to obtain a magnetic flux signal for each channel. Thus, only one processing circuit (2) need be provided for a large number of SQUID flux sensors, thus reducing the scale of the fluxmeter and making the device small.

公开(公告)号：EP0492261A2

公开(公告)日：1992-07-01

申请号：EP91121129.0

申请日：1991-12-10

申请人： NEUROMAG LTD

发明人： Kajola, Matti Jaakko ,  Knuutila, Jukka Erkki Tapani

IPC分类号： G01R33/022

CPC分类号： G01R33/022 ,  Y10S505/846

摘要： The invention concerns a pickup coil to measure components of gradients. The coil consists of two pairs of loops connected in series; these pairs are then connected in parallel. The coil so formed has a low inductance, and no shielding currents are induced to superconducting coils in homogeneous magnetic fields. One coil can be employed to measure several field components simultaneously when the coil is coupled to current sensing elements, for example to SQUIDs, so that the current components measured by the sensing elements do not couple magnetically because of the symmetry. This can be accomplished by connecting the said elements between terminals between the loops (5, 6 and 7, 8). The inductance of this coil can be further reduced by subdividing the loops into parts connected in parallel.

摘要翻译： 本发明涉及一种用于测量梯度分量的拾取线圈。 线圈由串联连接的两对回路组成; 这些对然后并联连接。 这样形成的线圈具有低电感，并且在均匀磁场中不会对超导线圈引起屏蔽电流。 当线圈耦合到电流感测元件（例如SQUID）时，可以采用一个线圈同时测量多个场分量，使得由于对称性而由感测元件测量的电流分量不会磁耦合。 这可以通过在环路（5,6,7和8）之间的端子之间连接所述元件来实现。 通过将回路分为并联连接的部件，可以进一步减小该线圈的电感。

公开(公告)号：EP0479206A2

公开(公告)日：1992-04-08

申请号：EP91116699.9

申请日：1991-09-30

申请人： DAIKIN INDUSTRIES, LIMITED

发明人： Ueda, Tomoaki ,  Yanagida, Yasuto ,  Tanaka, Masahiro

IPC分类号： G01R33/035 ,  G01R33/025

CPC分类号： G01R33/025 ,  G01R33/0017 ,  G01R33/0354 ,  G01R33/0356 ,  Y10S505/846

摘要： Output currents from a superconducting quantum interference device (2) which corresponds to magnetic flux guided thereto are compared with a predetermined value which corresponds to a magnetic flux locking point so as to detect a direction of shift with respect to the magnetic flux locking point. A shift quantity is judged to determine whether or not it is large based upon a history of the shift direction. A variation value component of an estimate feedback quantity is varied by taking this history into consideration. The estimate feedback quantity is used to guide magnetic flux for compensating for variation in the magnetic flux which is guided to the superconducting quantum interference device (2).

摘要翻译： 将来自超导量子干涉装置（2）的输出电流与对应于磁通量锁定点的预定值进行比较，以便检测相对于磁通量锁定点的偏移方向。 基于移动方向的历史判断移位量以确定其是否较大。 考虑到这个历史，估计反馈量的变化值分量是变化的。 估计反馈量用于引导磁通量以补偿被引导到超导量子干涉设备（2）的磁通量的变化。

公开(公告)号：EP0474235A2

公开(公告)日：1992-03-11

申请号：EP91115024.1

申请日：1991-09-05

申请人： DAIKIN INDUSTRIES, LIMITED

发明人： Ueda, Tomoaki

IPC分类号： G01R33/035

CPC分类号： G01R33/0356 ,  Y10S505/846

摘要： A constant bias voltage is applied to plural superconducting quantum interference devices (2) which are interconnected in parallel. Output currents from the superconducting quantum interference devices (2) are supplied in added condition. Maximal-sequence codes are modulated by a modulation current corresponding to each device (2), and the modulated maximal-sequence codes are supplied to the modulation coil (2c) of each corresponding superconducting quantum interference device (2), The added output current is demodulated for each device (2) by a maximal-sequence code which is phase shifted by the same quantity as the maximal-sequence code for modulation for each device (2).

摘要翻译： 将恒定偏置电压施加到并联互连的多个超导量子干涉装置（2）。 来自超导量子干涉装置（2）的输出电流被加入。 最大序列码由对应于每个设备（2）的调制电流调制，调制的最大序列码被提供给每个对应的超导量子干涉设备（2）的调制线圈（2c）。 通过与每个设备（2）的调制的最大序列码相同量的最大序列码对每个设备（2）进行解调。