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Superconducting magnetic sensor detecting coil and detector with same

A detection coil and magnetic sensor technology, which is applied in the direction of magnetic field measurement, instruments, and measuring devices using superconducting devices, can solve the problems of the measured weak magnetic field interference, achieve high signal-to-noise ratio, enhance the measured weak magnetic field signal, The effect of high common-mode rejection

Active Publication Date: 2016-08-31
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In view of the shortcomings of the prior art described above, 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 background magnetic field interferes with the measured weak magnetic field in the prior art

Method used

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  • Superconducting magnetic sensor detecting coil and detector with same
  • Superconducting magnetic sensor detecting coil and detector with same
  • Superconducting magnetic sensor detecting coil and detector with same

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Embodiment 1

[0047] like 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:

[0048] A superconducting common mode coil 11 and a superconducting differential mode coil 12 arranged in parallel, the superconducting common mode coil 11 and the superconducting differential mode coil 12 are precisely coupled to each other and the covered areas overlap; the superconducting common mode coil 11 generates a counteracting magnetic field opposite to the direction of the ambient magnetic field, suppresses the ambient magnetic field, and reduces the influence of the ambient magnetic field on the measured magnetic field; the superconducting differential mode coil 12 detects the measured magnetic field.

[0049] Specifically, such as Figure 4 As shown, the superconducting differential mode coil 12 is a planar first-order gradient coil, that is, the superconducting d...

Embodiment 2

[0056] like Figure 7 As shown, this embodiment provides a superconducting magnetic sensor detection coil, the structure of the superconducting magnetic sensor detection coil is consistent with the superconducting magnetic sensor detection coil in the first embodiment, the difference is that the first embodiment The ambient magnetic field balance area and the measured signal sensing area of ​​the superconducting magnetic sensor detection coil are not filled with high magnetic permeability materials, and the environmental magnetic field balance area and the measured signal sensing area of ​​the superconducting magnetic sensor detection coil in the second embodiment are filled There are high-permeability materials used to enhance the strength of the measured signal, and the magnetic induction of the measured signal is increased through the high-permeability material, so that the magnetic flux of the coupled measured signal is increased by an order of magnitude, which is beneficia...

Embodiment 3

[0061] like Figure 8 As shown, this embodiment provides a superconducting magnetic sensor detection coil, the superconducting magnetic sensor detection coil at least includes: a superconducting common mode coil 11 and a superconducting differential mode coil 12 arranged in parallel, the superconducting common mode The coil 11 and the superconducting differential mode coil 12 are precisely coupled to each other and the covered areas overlap; the superconducting common mode coil 11 produces a counteracting magnetic field opposite to the direction of the ambient magnetic field, suppressing the ambient magnetic field, and reducing the impact of the ambient magnetic field on the measured magnetic field influence; the superconducting differential mode coil 12 detects the measured magnetic field. The difference between this embodiment and Embodiment 1 is that the superconducting differential mode coil 12 is a planar second-order gradient coil.

[0062] Specifically, such as Figur...

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Abstract

The invention provides a superconducting magnetic sensor detecting coil and a detector with same. The superconducting magnetic sensor detecting coil comprises a superconducting common-mode coil and a superconducting differential-mode coil which are arranged parallelly. The superconducting common-mode coil and the superconducting differential-model coil are coupled with each other and furthermore the areas which are covered by the superconducting common-mode coil and the superconducting differential-model coil are overlapped. The superconducting common-mode coil generates an offset magnetic field of which the direction is opposite to the direction of an environmental magnetic field, thereby inhibiting the environmental magnetic field and reducing influence of the environmental magnetic field to a detected magnetic field. The superconducting differential-model coil is used for detecting the detected magnetic field. The invention further provides a detector which is composed of the superconducting magnetic sensor detecting coil and a SQUID magnetic sensor. The superconducting magnetic sensor detecting coil and the detector have high common-mode inhibition capability and can realize detection for a weak magnetic field signal in a no-shield environment. Furthermore through introducing a magnetic core with high magnetic conductivity into the coil, a detected weak magnetic field signal can be reinforced. The superconducting magnetic sensor detecting coil and the detector have high signal-to-noise ratio, and therefore the superconducting magnetic sensor detecting coil and the detector can be used for constructing low-cost high-performance weak magnetic detecting equipment which operates in the no-shield environment for detecting fetus magnetocardiogram, etc.

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] like 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 coi...

Claims

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Application Information

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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