公开(公告)号：US6034527A

公开(公告)日：2000-03-07

申请号：US65491

申请日：1998-04-24

申请人： Heinz-Peter Schiller ,  Wolfgang Schauer ,  Hans Reiner ,  Kai Grube ,  Milan Polak

发明人： Heinz-Peter Schiller ,  Wolfgang Schauer ,  Hans Reiner ,  Kai Grube ,  Milan Polak

IPC分类号： G01R33/07 ,  G01N27/72 ,  G01R31/00 ,  G01R33/12

CPC分类号： G01R33/1246 ,  G01R33/0094

摘要： A method and apparatus employs Hall probes for contactless, longitudinal and transversal homogeneity examination of a critical current density j.sub.c in a superconductor tape that is cooled to below a transition temperature T.sub.c. The cooled superconductor tape is pulled through an external, locally limited magnetic field that has a constant gradient and a fixed magnetic field axis. The magnetic field generated by a screening current induced in a region of the superconductor tape penetrated by the external magnetic field is scanned using a first Hall probe at a distance of a few tenths of millimeters to the superconductor tape. The external magnetic field outside of a field range of the induced persistent currents is measured with a second Hall probe. A compensated difference between the first and second Hall probe signals is used as a qualitative measure for a critical current density j.sub.c (x) and its longitudinal homogeneity which varies locally with respect to a longitudinal axis of the superconductor tape. The compensated difference is formed by adjusting a test difference between the two Hall probe signals to zero as a result of measuring the external magnetic field by both Hall probes in a dummy measurement conducted without the superconductor tape. A transverse homogeneity with a linear Hall probe array that is positioned crosswise to the longitudinal axis of the superconductor tape and extends broadside over the superconductor tape is measured after all Hall probes in the array have first been adjusted to zero with a signal from the second probe. Quantitative locally critical current densities are specified from the Hall probe signals by a resistive calibration obtained from a current-voltage measurement.

摘要翻译： 一种方法和装置使用霍尔探头进行非接触式，纵向和横向均匀性检查，该超临界电流密度jc在冷却至转变温度Tc以下的超导带中。 冷却的超导体带被拉动通过具有恒定梯度和固定磁场轴的外部局部受限的磁场。 通过在由外部磁场穿透的超导体带的区域中感应的屏蔽电流产生的磁场，使用距离超导体磁带的十分之几毫米的第一霍尔探头进行扫描。 用第二霍尔探头测量感应持续电流的场范围外的外部磁场。 第一和第二霍尔探测信号之间的补偿差异被用作临界电流密度jc（x）及其相对于超导带的纵轴局部变化的纵向均匀性的定性测量。 通过将两个霍尔探头信号之间的测试差调整为零，作为通过两个霍尔探针在没有超导带的虚拟测量中的外部磁场的结果来形成补偿差分。 在阵列中的所有霍尔探针首先通过来自第二探针的信号调节到零之后，测量与线性霍尔探针阵列的横向均匀性，该直线霍尔探针阵列与超导带的纵向轴线交叉定位并在超导带上延伸越过侧面 。 通过从电流 - 电压测量获得的电阻校准，从霍尔探针信号中指定定量局部临界电流密度。

公开(公告)号：US5223798A

公开(公告)日：1993-06-29

申请号：US606396

申请日：1990-10-31

申请人： Wayne C. McGinnis ,  Thomas E. Jones

发明人： Wayne C. McGinnis ,  Thomas E. Jones

IPC分类号： G01R27/00 ,  G01R33/12

CPC分类号： G01R33/1246 ,  G01R27/00 ,  Y10S505/843

摘要： The present invention provides a method for measuring the intragranular andntergranular critical current of a granular superconductive material, comprising the steps of: 1) conducting a substantially rectangular electronic pulse through the material so as to conduct a current through the material such that when the intergranular critical current of the material is exceeded, any grains present in the material remain in a superconducting state when the current level is below the intragranular critical current; 2) measuring the current through the material while conducting the pulse; 3) measuring a voltage difference across the material while conducting the pulse; 4) determining the intergranular critical current through the material by discerning a non-zero voltage difference across the material and contemporaneously measuring the current; and 5) determining the intragranular critical current through the material by varying the current to discern a current level at which the electrical resistance of the material increases to that of the non-superconducting state as the grains of the material transition from the superconducting to a non-superconducting state. This method may also be used to determine the critical current of a homogeneous superconductive material.

摘要翻译： 本发明提供了一种用于测量颗粒状超导材料的晶粒内和晶间临界电流的方法，包括以下步骤：1）通过材料导通基本上矩形的电子脉冲，以便使电流通过材料，使得当晶间 超过材料的临界电流，当电流低于晶内临界电流时，存在于材料中的任何晶粒都保持在超导状态; 2）在进行脉冲时测量通过材料的电流; 3）在进行脉冲时测量材料两端的电压差; 4）通过识别材料上的非零电压差并同时测量电流来确定通过材料的晶间临界电流; 和5）通过改变电流来确定通过材料的晶内临界电流，以鉴别材料的电阻增加到非超导状态的电流水平，当材料的晶粒从超导转变为非超导状态时， 超导状态 该方法也可用于确定均质超导材料的临界电流。

公开(公告)号：US20120249171A1

公开(公告)日：2012-10-04

申请号：US13395138

申请日：2010-08-02

申请人： Michael Bäcker ,  Jan Wiezoreck

发明人： Michael Bäcker ,  Jan Wiezoreck

IPC分类号： G01R31/08

CPC分类号： G01R33/1238 ,  G01R33/1246

摘要： The invention relates to a method and a device for the quality control of superconducting bands with regard to the critical current carrying capacity of the band, wherein the method comprises the following steps: a) cooling a section of the superconducting band to a temperature at which said band section becomes superconducting, wherein the length of the band equals a multiple of the band section length, b) generating an electrical transport current in the superconducting band section in the longitudinal direction of the band by contacting with a contact assembly, which comprises electrical feed and dissipation contacts spaced apart in the longitudinal direction of the band in order to generate the transport current between them, c) contacting the cooled band section with the electrical contacts of the contact assembly, which are spaced apart from one another in the longitudinal direction of the band, in order to form a measurement section over a partial length of the band section to which the transport current applied, d) continuously moving at least one part of the band in the longitudinal direction of the band through the contact section and/or through the measurement section to electrically contact the moving band so as to generate a transport current progressing through the band in the longitudinal direction of the band, e) detecting a physical measured variable on the basis of the generated transport current in relation to the measurement section by means of the measurement contacts during the movement of at least one part of the band through the measurement section, wherein the physical measured variable is a measure of the superconducting electrical transport properties of the band section or a part of the band.

摘要翻译： 本发明涉及一种关于带的临界电流承载能力的超导带的质量控制的方法和装置，其中该方法包括以下步骤：a）将超导带的一部分冷却至 所述带段变为超导，其中所述带的长度等于所述带段长度的倍数，b）通过与接触组件接触而在所述带的纵向方向上在所述超导带区段中产生电输送电流，所述接触组件包括电 馈送和消散接触沿带的纵向方向间隔开，以便在它们之间产生传输电流，c）使冷却的带段与接触组件的电触头相接触，接触组件的纵向方向彼此间隔开 以便在频带部分的部分长度上形成到w的测量部分 运输电流施加，d）通过接触部分和/或通过测量部分在带的纵向方向上连续地移动带的至少一部分，以电接触移动带，以产生传送电流 沿带的纵向方向的带; e）根据所产生的传输电流，相对于测量部分借助测量接触来检测物理测量变量，所述测量接触在至少一部分带通过 测量部分，其中所述物理测量变量是所述带部分或所述带的一部分的超导电输送特性的量度。

公开(公告)号：US20110270557A1

公开(公告)日：2011-11-03

申请号：US12997055

申请日：2010-07-28

申请人： Kyeong Dal Choi ,  Ji Kwang Lee ,  Woo Seok Kim ,  Chan Park ,  Byung Wook Han ,  Se Yeon Lee

发明人： Kyeong Dal Choi ,  Ji Kwang Lee ,  Woo Seok Kim ,  Chan Park ,  Byung Wook Han ,  Se Yeon Lee

IPC分类号： G01R19/08 ,  G06F19/00

CPC分类号： G01R33/1246 ,  G01N27/82 ,  G01R19/08

摘要： A method for measuring critical current density of superconductor wires according to the present invention is characterized in that it includes: (a) applying an external magnetic field to the superconductor wires, (b) measuring a magnetization loss of the superconductor wires according to the application of the external magnetic field, (c) normalizing the measured magnetization loss, and then calculating a fully-penetration magnetic field of the superconductor wires according to the normalized magnetization loss, (d) calculating a critical current density of the superconductor wires according to the calculated fully-penetration magnetic field. Therefore, the critical current density of parallel superconductor wires such as stacked superconductor wires may be measured without applying current to the superconductor wires directly.

摘要翻译： 根据本发明的用于测量超导线的临界电流密度的方法的特征在于其包括：（a）向超导体线施加外部磁场，（b）根据应用测量超导体线的磁损耗 ，（c）归一化所测量的磁化损耗，然后根据归一化的磁化损耗计算超导体线的完全穿透磁场，（d）计算超导体线的临界电流密度，根据 计算完全穿透磁场。 因此，可以在不直接向超导体电线施加电流的情况下测量平行超导体线如堆叠超导线的临界电流密度。

公开(公告)号：US20100253373A1

公开(公告)日：2010-10-07

申请号：US12616857

申请日：2009-11-12

申请人： Hiroshi KAWASHIMA

发明人： Hiroshi KAWASHIMA

IPC分类号： G01R27/08

CPC分类号： H02H7/001 ,  G01R31/024 ,  G01R33/1246 ,  H01F6/02 ,  Y02E40/68

摘要： The quench of the superconducting coil is desired to be detected early while suppressing the influences of the noise generated in charge and discharge of the superconducting coil. A superconducting coil quench detection apparatus detects the balance voltage of a bridge circuit formed by the superconducting coil and a resistor to output it as a quench detection signal for detecting the quench thereof. A signal indicating the hold period where the energy accumulated in the superconducting coil is held is generated. A signal included in the hold period is extracted from the quench detection signal. The quench of the superconducting coil is detected based on the extracted signal.

摘要翻译： 期望早期检测超导线圈的淬火，同时抑制在超导线圈的充电和放电中产生的噪声的影响。 超导线圈淬火检测装置检测由超导线圈形成的桥接电路的平衡电压和电阻器，作为用于检测其淬火的淬火检测信号输出。 产生表示保持在超导线圈中蓄积的能量的保持期间的信号。 从骤冷检测信号中提取包含在保持期间的信号。 基于提取的信号检测超导线圈的淬火。

公开(公告)号：US06452375B1

公开(公告)日：2002-09-17

申请号：US09615640

申请日：2000-07-13

申请人： J. Yates Coulter ,  Raymond DePaula

发明人： J. Yates Coulter ,  Raymond DePaula

IPC分类号： G01R1900

CPC分类号： G01R33/1238 ,  G01R33/1246

摘要： A cryogenic linear positioner which is primarily used for characterizing coated conductor critical current homogeneity at 75K is disclosed. Additionally, this tool can be used to measure the positional dependence of the coated conductor resistance at room temperature, and the room temperature resistance of the underlying YBCB coating without the overlaying protective cover of silver.

摘要翻译： 公开了一种主要用于表征75K涂层导体临界电流均匀性的低温线性定位器。 此外，该工具可用于测量室温下涂覆导体电阻的位置依赖性，以及底层YBCB涂层的室温电阻，无需镀银保护层。

公开(公告)号：US5132279A

公开(公告)日：1992-07-21

申请号：US571299

申请日：1990-08-22

申请人： Ulf E. Israelsson ,  Donald M. Strayer

发明人： Ulf E. Israelsson ,  Donald M. Strayer

IPC分类号： G01R33/12

CPC分类号： G01R33/1246 ,  Y10S505/726 ,  Y10S505/727

摘要： A contact-less method for determining transport critical current density and flux penetration depth in bulk superconductor material. A compressor having a hollow interior and a plunger for selectively reducing the free space area for distribution of the magnetic flux therein are formed of superconductor material. Analytical relationships, based upon the critical state model, Maxwell's equations and geometrical relationships define transport critical current density and flux penetration depth in terms of the initial trapped magnetic flux density and the ratio between initial and final magnetic flux densities whereby data may be reliably determined by means of the simple test apparatus for evaluating the current density and flux penetration depth.

摘要翻译： 用于确定体超导体材料中的传输临界电流密度和通量穿透深度的无接触方法。 具有中空内部的压缩机和用于选择性地减小用于分配磁通量的自由空间区域的柱塞由超导体材料形成。 基于临界状态模型的分析关系，麦克斯韦方程和几何关系根据初始捕获的磁通密度和初始和最终磁通密度之间的比率确定了传输临界电流密度和通量穿透深度，从而数据可以可靠地由 用于评估电流密度和通量穿透深度的简单测试装置的手段。

公开(公告)号：US20170370970A1

公开(公告)日：2017-12-28

申请号：US15635664

申请日：2017-06-28

申请人： U.S. Army Research Laboratory ATTN: RDRL-LOC-I

发明人： George A. Levin ,  Paul N. Barnes ,  Charles C. Rong

IPC分类号： G01R15/20 ,  G01R19/00

CPC分类号： G01R15/207 ,  G01R19/0092 ,  G01R33/1238 ,  G01R33/1246

摘要： A method of measuring superconducting critical current in persistent mode using superconducting closed loops which allow the persistent current to flow without any joints. This persistent critical current is different than traditional resistive critical current that is the upper limit of the superconducting current carrying capacity, and provides the information about the range of critical current in persistent mode that is more close to applications in MRI, SMES, and Maglev operations. The measurement can be used as a quality control method in the manufacturing process and a piece of crucial information to magnet manufacturers for the design and fabrication of magnet. The superconducting materials include the second generation superconducting wires (coated conductors) based on Rare Earth (RE) Barium Copper Oxide superconducting material (REBa2Cu3O6+x, REBCO), or any other type of superconducting wires that can be manufactured in the form of tape.

公开(公告)号：US20100227765A1

公开(公告)日：2010-09-09

申请号：US11990147

申请日：2006-09-22

申请人： Eisaku Ueno ,  Takeshi Kato ,  Jun Fujikami

发明人： Eisaku Ueno ,  Takeshi Kato ,  Jun Fujikami

IPC分类号： G01N27/00 ,  G01R19/00

CPC分类号： G01R33/1246 ,  G01R33/072

摘要： A method of measuring the critical current value of a superconducting wire comprises the step of measuring first to mth (m denotes an integer of at least 2) current values (I1, I2, . . . , Im) and first to mth voltage values (V1, V2, . . . , Vm) corresponding to the respective ones of the first to mth current values. The first current value I1 and the first voltage value V1 are measured by retaining the current fed from a constant current source to the superconducting wire in a state set to a first set value I1a for a constant time and thereafter measuring the current flowing through the superconducting wire and a voltage generated in the superconducting wire. The kth (k denotes an integer satisfying 2≦k≦m) current value Ik and the kth voltage value Vk are measured by retaining the current fed from the constant current source to the superconducting wire in a state set to a kth set value Ika higher than a (k−1)th set value for the constant time and thereafter measuring the current flowing through the superconducting wire and the voltage generated in the superconducting wire. Thus, a correct critical current value can be measured.

摘要翻译： 测量超导线的临界电流值的方法包括以下步骤：首先测量（m表示至少为2的整数）电流值（I1，I2，...，Im）和第一至第m电压值 V1，V2，...，Vm）对应于第一至第m电流值中的相应值。 第一电流值I1和第一电压值V1通过将从恒定电流源馈送的电流保持在设定为第一设定值I1a的状态达到恒定时间，然后测量流过超导的电流来测量超导线 电线和在超导线中产生的电压。 第k个（k表示满足2＆nlE; k＆nlE; m）的整数，电流值Ik和第k个电压值Vk是通过将恒定电流源馈送到超导线的电流保持在设定为第k个设定值Ika的状态下来测量的 比第（k-1）个恒定时间的设定值，然后测量流过超导线的电流和在超导线中产生的电压。 因此，可以测量正确的临界电流值。

公开(公告)号：US20100066357A1

公开(公告)日：2010-03-18

申请号：US12560303

申请日：2009-09-15

申请人： Fred M. Mueller ,  Jens Haenisch

发明人： Fred M. Mueller ,  Jens Haenisch

IPC分类号： G01R33/02

CPC分类号： G01R33/1246

摘要： The transverse critical-current uniformity in a superconducting tape was determined using a magnetic knife apparatus. A critical current Ic distribution and transverse critical current density Jc distribution in YBCO coated conductors was measured nondestructively with high resolution using a magnetic knife apparatus. The method utilizes the strong depression of Jc in applied magnetic fields. A narrow region of low, including zero, magnetic field in a surrounding higher field is moved transversely across a sample of coated conductor. This reveals the critical current density distribution. A Fourier series inversion process was used to determine the transverse Jc distribution in the sample.

摘要翻译： 使用磁刀装置测定超导带中的横向临界电流均匀性。 使用磁刀设备以高分辨率非破坏性地测量YBCO涂层导体中的临界电流Ic分布和横向临界电流密度Jc分布。 该方法利用了施加磁场中Jc的强抑制。 在周围的较高场中的包括零磁场的窄区域横向移动穿过涂覆导体的样品。 这揭示了临界电流密度分布。 使用傅里叶级数反演方法确定样品中的横向Jc分布。