Magnetic sensor

A magnetic sensor and magnetoelectric composite material technology, applied in the field of magnetic sensors, can solve the problems that magnetoelectric magnetic sensors cannot be used in the medical industry, cannot be applied to precision capsule endoscopes, and it is difficult to check the small intestine of patients, so as to improve the signal quality. Effects of processing efficiency, ease of miniaturization and integration, and simplification of back-end signal processing circuits

Inactive Publication Date: 2018-02-16
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0002] The wireless capsule endoscope is a major breakthrough in endoscopy, it overcomes the two shortcomings of the traditional cable endoscope: it is difficult to achieve a complete small intestine inspection and it brings great pain to the patient, so the development potential is huge
The second method requires high power consumption and is only used in endoscopes with cables
However, this structure requires a relatively large magnet to provide a bias magnetic fiel

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Embodiment Construction

[0034] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementations described here are only used to illustrate and explain the present invention, but not to limit the present invention.

[0035] Aiming at various problems existing in the existing magnetic sensors, the present invention provides a magnetic sensor, comprising: a support structure; and three mutually orthogonal layered magnetoelectric composite materials embedded on the support structure, each The layered magnetoelectric composite materials are composed of one layer of piezoelectric material, two layers of magnetostrictive material, two layers of self-biasing material and four layers of adhesive material.

[0036]Therefore, the present invention provides a self-biased magnetless magnetic sensor, which can achieve the purpose of high magnetoelectric effect without introducing a bias magnetic ...

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Abstract

The invention provides a magnetic sensor comprising: a support structure; and three mutually orthogonal layered magnetoelectric composite materials embedded on the support structure, each of the layered magnetoelectric composite materials being formed of a piezoelectric material layer, two magnetostrictive material layers, two self-biasing material layers and four adhesive material layers. The magnetic sensor of the invention has the advantages of low power consumption, small volume, high stability, small fractional bandwidth, vector type and good orthogonality.

Description

technical field [0001] The invention relates to a magnetic sensor, in particular to a miniature vector magnetic sensor used in indoor precise positioning or endoscope capsule positioning. Background technique [0002] The wireless capsule endoscope is a major breakthrough in endoscopy. It overcomes the two shortcomings of the traditional cable endoscope: it is difficult to achieve a complete small intestine inspection and it brings great pain to the patient, so the development potential is huge. However, in order to further promote capsule endoscopy, problems such as determination of pathological tissue location, active control of capsule movement, image quality, and observation of pathological tissue must be solved. These problems are related to the positioning of the capsule. The schematic diagram of the capsule endoscope module is shown in figure 1 shown. There are several methods for positioning capsule endoscopes. One of the methods is the positioning technology based...

Claims

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Application Information

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IPC IPC(8): G01R33/06
CPCG01R33/06
Inventor 罗豪甦马甲帅方聪姚蒙狄文宁李晓兵杨林荣林迪
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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