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Two-stage superconducting quantum interference apparatus's magnetic flux-voltage conversion device, method and application thereof

A superconducting quantum interference and voltage conversion technology, which is applied in the field of magnetic sensors, can solve problems such as poor practicability, unstable performance, and multi-value operating points, and achieve the effect of changing the current state of technology, breaking through technical bottlenecks, and solving unstable operating points

Active Publication Date: 2016-12-07
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0011] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a two-stage superconducting quantum interference device, a flux-voltage conversion device, a method and its application, which are used to solve the problems of the two-stage superconducting quantum interference in the prior art. Problems such as multi-value operating points, unstable performance, and poor practicability in flux-voltage conversion

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  • Two-stage superconducting quantum interference apparatus's magnetic flux-voltage conversion device, method and application thereof
  • Two-stage superconducting quantum interference apparatus's magnetic flux-voltage conversion device, method and application thereof
  • Two-stage superconducting quantum interference apparatus's magnetic flux-voltage conversion device, method and application thereof

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[0074] The following describes the implementation of the present invention through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0075] See Figure 9 ~ Figure 24 . It should be noted that the illustrations provided in this embodiment only illustrate the basic idea of ​​the present invention in a schematic way, and the figures only show the components related to the present invention instead of the number, shape, and shape of the components in actual implementation. For size drawing, the type, quantity, and proportion of each component can be changed at will during actu...

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Abstract

The invention provides a two-stage superconducting quantum interference apparatus's magnetic flux-voltage conversion device, method and application thereof. Through the amplification and combination of current's positive feedback and limiting amplification, the magnetic flux-voltage transfer rate is improved and the outputted magnetic amplitude is less than 2[phi]0, which avoids multiple zero points of transmission. At the same time, the SQUID magnetic detection module, using an under-feedback principle, achieves a magnetic flux detector that can realize self-reset and has a monotonic transfer characteristic to ensure that the outputted magnetic flux of the SQUID magnetic flux amplification module is conducted at a fixed operating point under a uniquely defined transmission characteristic for magnetic-voltage conversion and that the problem of multi-value transmission characteristics is addressed. The invention has the advantages that the two-stage SQUID amplifying module can improve the magnetic flux-voltage transmission rate and the single operating point cycle value in the transmission characteristic is obtained to avoid the multi-value problem; the operation is simple and the noise performance is improved greatly and can provide a practical high-performance SQUID magnetic sensor, thus a practical high-performance SQUID magnetic sensor can be formed.

Description

Technical field [0001] The invention relates to the technical field of magnetic sensors, in particular to a dual-stage superconducting quantum interference device magnetic flux-voltage conversion device, method and application thereof. Background technique [0002] The magnetic sensor based on the Superconducting Quantum Interference Device (SQUID) is the most sensitive magnetic detector currently known. It is widely used in the detection of weak magnetic fields such as biological magnetic field, terrestrial magnetic field anomalies, and very low field nuclear magnetic resonance. Its detection sensitivity has reached Feite (10 -15 Tesla). SQUID magnetic sensor is an important magnetic sensor device in extreme detection and scientific research, and has high scientific research and application value. [0003] The SQUID device is the core magnetic sensor in the SQUID magnetic sensor. Usually a DC SQUID device (the SQUID described below refers to a DC SQUID device), the device is a s...

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Application Information

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IPC IPC(8): G01R33/035
Inventor 王永良徐小峰孔祥燕谢晓明
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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