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Magnetic brain signal probe, sensor and acquisition system based on gmi effect

A signal sensor, sensor technology, applied in the direction of sensor, application, medical science, etc., can solve the problems of measurement result error, spatial displacement error, etc., and achieve the effect of quick preparation, simple use, and convenient and quick use.

Active Publication Date: 2019-03-29
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process not only requires the sensor to accurately determine the axis rotation, but also the collected data needs to go through a complex processing and restoration process
In biomagnetic field detection with extremely high precision requirements (pT level), a large spatial displacement error will be introduced, which will cause a large error to the final measurement result

Method used

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  • Magnetic brain signal probe, sensor and acquisition system based on gmi effect
  • Magnetic brain signal probe, sensor and acquisition system based on gmi effect
  • Magnetic brain signal probe, sensor and acquisition system based on gmi effect

Examples

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Embodiment 1

[0030] Such as figure 1As shown, the magnetic brain signal probe based on the GMI effect of this embodiment includes at least three groups of amorphous wires 11 arranged on the same plane and in the shape of straight strips, and each group of amorphous wires 11 includes one amorphous wire 11 , an angle is formed between any adjacent two groups of amorphous wires 11, each group of amorphous wires 11 is covered with a pick-up coil 12, and each group of amorphous wires 11 can also be two or more as required The amorphous wire 11 . This embodiment includes at least three groups of amorphous wires 11 arranged on the same plane and in a straight strip shape. An angle is formed between any adjacent two groups of amorphous wires 11. If the measurement of the planar magnetic field is performed, only the The distribution of the spatial magnetic field on the plane can be obtained by two measurements, including not only the magnitude of the magnetic field, but also the direction of the m...

Embodiment 2

[0045] Such as Figure 6 As shown, this embodiment is basically the same as Embodiment 1, and the main differences are: in Embodiment 1, a set of amorphous wires 11 is provided with a feedback coil 13, and two groups of amorphous wires 11 are provided with a correction coil. zero coil 14, so the initialization Figure 4 When the circuit shown is connected, one of the two zero calibration coils 14 can be selected arbitrarily as required. And in the present embodiment, two groups of amorphous wires 11 are provided with feedback coils 13, and one group of amorphous wires 11 is provided with zero calibration coils 14, so in the initialization Figure 4 When the circuit shown is connected, one of the two feedback coils 13 can be selected arbitrarily according to needs, and its working principle is exactly the same as that of the first embodiment, so it will not be repeated here.

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Abstract

The invention discloses a brain magnetic signal probe, sensor and collecting system based on a GMI effect. The brain magnetic signal probe comprises at least three sets of amorphous wires which are arranged on the same plane and are in a straight strip shape. Each set of amorphous wires comprises at least one amorphous wire. An included angle is formed between any two adjacent sets of amorphous wires. Each set of amorphous wires is sleeved with a picking coil. The brain magnetic signal sensor comprises the brain magnetic signal probe and a sensor peripheral circuit. The brain magnetic signal collecting system comprises a brain magnetic signal receiving module, a signal collector and at least one brain magnetic signal sensor. The plug and play effect is achieved, the brain magnetic signal probe can be used for detecting the brain activity state at any time, practicability of a brain-computer interface is improved, the brain-computer interface is expanded into practical application, and the brain magnetic signal probe has the advantages of being fast to prepare, easy to use, high in detection precision, stable and reliable.

Description

technical field [0001] The invention relates to a magnetic brain signal acquisition device for brain-computer interface technology research experiments, in particular to a magnetic brain signal probe, sensor and acquisition system based on the GMI effect. Background technique [0002] Brain-Computer Interface (BCI) is a new type of human-computer interaction technology that can directly convert the brain's thinking consciousness into external device control instructions. Its potential application value is in the fields of academic research, rehabilitation medicine, and military operations. is getting more and more attention. At present, relevant research teams at home and abroad have developed some impressive brain-computer interface demonstration systems (such as spelling of thinking characters, brain-controlled wheelchairs, etc.), but the use environment of these systems is still limited to the laboratory, and users It is difficult to use the BCI system for a long time wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/0478
CPCA61B5/6803A61B5/6814A61B5/291
Inventor 徐明周宗潭徐晓红王志华
Owner NAT UNIV OF DEFENSE TECH