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Magnetic flux-voltage conversion device, method and application of double-stage superconducting quantum interferometer

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

Active Publication Date: 2019-06-25
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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  • Magnetic flux-voltage conversion device, method and application of double-stage superconducting quantum interferometer
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  • Magnetic flux-voltage conversion device, method and application of double-stage superconducting quantum interferometer

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[0074] Embodiments of the present invention are described below through specific examples, and 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 implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0075] see Figure 9 to Figure 24 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of ​​the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed ar...

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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 magnetic flux-voltage conversion device, method and application of a double-stage superconducting quantum interference device. Background technique [0002] The magnetic sensor based on the superconducting quantum interference device (Superconducting Quantum Interference Device, SQUID) is the most sensitive magnetic detector known so far. 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. SQUID magnetic sensor is an important magnetic sensor device in limit detection and scientific research, and has high scientific research and application value. [0003] The SQUID device is the core magnetic sensitive element in the SQUID magnetic sensor. A DC SQUID device is usually u...

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Application Information

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Patent Type & Authority Patents(China)
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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