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GMI sensor probe based on ring-shaped amorphous wire and preparation method thereof

A sensor probe, amorphous wire technology, applied in the size/direction of the magnetic field, instruments, magnetic field measurement using electromagnetic devices, etc., can solve the problems of limited spatial resolution of amorphous wire, limited, etc. Avoid the effect of shielding

Active Publication Date: 2017-09-05
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

That is to say, the spatial resolution of this scheme is limited by the length of the amorphous wire, which is very limited

Method used

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  • GMI sensor probe based on ring-shaped amorphous wire and preparation method thereof
  • GMI sensor probe based on ring-shaped amorphous wire and preparation method thereof

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Embodiment Construction

[0013] Such as figure 2 As shown, the GMI sensor probe based on the loop-shaped amorphous wire of this embodiment includes an amorphous wire coil 1 wound in a loop, and the amorphous wire coil 1 includes a magnetic field-sensitive amorphous wire segment ( figure 2 Indicated by the dotted line in the middle) and the loss of magnetic field sensitive amorphous wire segment ( figure 2 Indicated by a solid line in the middle), a signal pickup coil 2 is wound on the section of the amorphous wire sensitive to loss of magnetic field. The GMI sensor probe based on the ring-shaped amorphous wire of this embodiment can overcome the processing shortcomings of the amorphous wire itself, which is difficult to weld. While realizing the spatial reuse of the amorphous wire, it only needs to use the mature heat treatment process in the material process instead of performing A large number of complex and immature amorphous wire welding; and the GMI sensor probe based on the loop-shaped amorph...

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Abstract

The invention discloses a GMI sensor probe based on a ring-shaped amorphous wire and a preparation method thereof. The GMI sensor probe comprises a amorphous wire coil which is formed by winding the ring-shaped amorphous wire, wherein the amorphous wire coil comprises an amorphous wire section with the sensitivity to magnetic fields and an amorphous wire section losing the sensitivity to magnetic fields, and a signal acquiring coil is wound around the amorphous wire section losing the sensitivity to magnetic fields; The preparation method of the GMI sensor probe comprises the following steps of winding the amorphous wire into the ring-shaped amorphous wire coil, conducting heat treatment on a defined section of the amorphous wire coil so as to enable the amorphous wire coil to form the amorphous wire section with the sensitivity to magnetic fields and the amorphous wire section losing the sensitivity to magnetic fields, and winding and forming the signal acquiring coil around the amorphous wire section losing the sensitivity to magnetic fields. A processing shortcoming that the amorphous wire is hard to weld can be overcome, amorphous wire spatial reuse is achieved, and meanwhile only a mature heat treatment process in the material processing techniques is needed while plenty of complicated and immature amorphous welding is not needed.

Description

Technical field [0001] The invention relates to a biomagnetic signal acquisition device that can be applied to brain-computer interface technology research experiments, in particular to a GMI sensor probe based on a loop-shaped amorphous wire and a preparation method thereof. Background technique [0002] In the field of magnetic measurement, GMI magnetic sensor has attracted wide attention due to its wide measurement range, high limit sensitivity and its convenience and ease of use. The GMI effect is when the soft magnetic material (mostly Co-based amorphous and Fe-based nanocrystalline) wires or strips are passed with alternating current I ac , The AC voltage induced across the material U w The external magnetic field applied along the longitudinal direction of the wire H ex The phenomenon of sensitive change due to the change of the amorphous material is essentially the sensitive change of the impedance of the amorphous material itself with the applied magnetic field. Through ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/06
CPCG01R33/063
Inventor 周宗潭郭善磁徐明徐晓红卢惠民
Owner NAT UNIV OF DEFENSE TECH
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