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A superconducting magnetic sensor detection coil and detector

A detection coil and sensor technology, which is applied in the direction of magnetic field measurement, instruments, and measuring devices using superconducting devices, can solve the problems of difficult to achieve high detection signal-to-noise ratio and weak measured magnetic field signal, and achieve the improvement of weak magnetic field The ability of signal detection, the effect of increasing the signal-to-noise ratio, and increasing the magnetic flux

Active Publication Date: 2019-08-16
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0015] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a superconducting magnetic sensor detection coil and a detector, which are used to solve the problem that the measured magnetic field signal is weak and it is difficult to achieve a high detection signal-to-noise ratio in the prior art. question

Method used

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  • A superconducting magnetic sensor detection coil and detector
  • A superconducting magnetic sensor detection coil and detector
  • A superconducting magnetic sensor detection coil and detector

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Embodiment 1

[0045] Such as Figure 4 ~ Figure 6 As shown, the present invention provides a superconducting magnetic sensor detection coil 1, and the superconducting magnetic sensor detection coil 1 at least includes:

[0046] Superconducting gradient coil 11, the superconducting gradient coil 11 is a planar coil, using a balanced superconducting winding structure, including a symmetrically distributed environmental magnetic field balance area and a measured signal induction area, the environmental magnetic field balance area and the The sensing area of ​​the signal under test is provided with a high magnetic permeability material 12, and the high magnetic permeability material 12 improves the pick-up strength of the signal under test.

[0047] Specifically, magnetic permeability is a physical quantity that characterizes the magnetic properties of a magnetic medium. Indicates the resistance to generate magnetic flux after the current flows through the coil in the space or in the magnetic ...

Embodiment 2

[0054] Such as Figure 7 As shown, this embodiment provides a detection coil for a superconducting magnetic sensor. The difference between this embodiment and Embodiment 1 is that the superconducting gradient coil 11 is a planar second-order gradient coil.

[0055] Specifically, such as Figure 7 As shown, the superconducting gradient coil 11 is a planar second-order gradient coil, and the superconducting wire is routed along the second axis of symmetry and the third axis of symmetry, and the second axis of symmetry and the third axis of symmetry are perpendicular to each other. In an embodiment, the second axis of symmetry is a straight line in the direction of the x-axis, the third axis of symmetry is a line in the direction of the y-axis, and the superconducting gradient coil 11 is symmetrical along the second axis of symmetry and the third axis of symmetry. The axis is symmetrical up and down, left and right respectively. The second axis of symmetry and the third axis of...

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Abstract

The invention provides a detection coil of a superconducting magnetic sensor and a detector. The detection coil comprises a superconducting gradient coil being a planar coil; the superconducting gradient coil having a balanced superconducting winding structure consists of an environment magnetic field balance area and a detected signal induction area, wherein the two areas are distributed symmetrically; and high-magnetic-permeability materials are arranged at the environment magnetic field balance area and the detected signal induction area. In addition, a detector is formed by the superconducting magnetic sensor and a superconducting quantum interference device (SQUID)-based magnetic sensor. According to the invention, the high-magnetic-permeability materials are added into the detection coil with the balanced structure, thereby realizing capturing of more weak magnetic signals and thus increasing a signal to noise ratio of the detected signal. The detection coil and the detector are applied to detection of a weak magnetic field like fetus magnetocardiographic detection; the weak magnetocardiographic signal detection capability can be improved; and the fetus heart signal monitoring capability by the magnetocardiography can be enhanced. Therefore, the detection coil and the detector have important significance.

Description

technical field [0001] The invention relates to the field of weak magnetic field detection, in particular to a superconducting magnetic sensor detection coil and a detector. Background technique [0002] Magnetic detectors based on Superconducting Quantum Interference Device (SQUID for short) are currently known to have the lowest noise level and the most sensitive magnetic detectors. It is widely used in weak magnetic field detection applications such as biological magnetic field, earth magnetic field anomaly, and extremely low-field nuclear magnetic resonance. Its detection sensitivity has reached Feite (10 -15 Tesla) magnitude. It has high scientific research and application value in extremely weak magnetic field detection and scientific research. [0003] Such as figure 1 As shown, the magnetic detector based on the superconducting quantum interference device SQUID is mainly composed of the following parts: [0004] 1. Detection coil, that is, superconducting pickup ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/035
CPCG01R33/0358
Inventor 王永良徐小峰张树林谢晓明
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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