Magnetic probe and magnetic field sensor having same

A technology of magnetic field sensor and magnetic probe, which is applied in the direction of instruments, measuring magnetic variables, measuring devices, etc., to achieve the effect of good linear relationship

Inactive Publication Date: 2015-08-19
BEIJING CEGT SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, there is still a lot of room for improvement in the sensitivity and linearity of the existing magnetic field sensors.

Method used

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  • Magnetic probe and magnetic field sensor having same
  • Magnetic probe and magnetic field sensor having same
  • Magnetic probe and magnetic field sensor having same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] figure 1 shows a perspective view of the magnetic probe of the present invention, figure 2 shown figure 1 Front view of the magnetic probe in, image 3 shown figure 1 Cross-sectional view of the magnetic probe in .

[0030] In one embodiment, the magnetic probe of the present invention includes: a magnetic component 11 , a skeleton 13 , and a detection coil 14 .

[0031] The skeleton 13 is cylindrical, and there is a through cavity inside the skeleton 13 that runs through the skeleton 13 along the length direction, preferably a cylindrical cavity. The skeleton 13 is insulated and made of non-magnetic material, preferably by injection molding of LCP liquid crystal polymer. LCP is a polymer material, an intermediate state polymer between solid crystal and liquid. Although its molecular arrangement is not as three-dimensional as solid crystal, it is not as disordered as liquid, but has a certain (one-dimensional or two-dimensional) orderliness.

[0032] The magneti...

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PUM

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Abstract

The invention provides a magnetic probe comprising the following elements: a frame having a cavity; a magnetic part penetrating the frame through the cavity and allowing pulse current to pass; a detection coil winding on an outer surface of the frame. The invention also provides a magnetic field sensor comprising the following structures: an oscillating source circuit used for generating an oscillating source signal; a magnetic detection circuit used for detecting outer magnetic field and comprising the magnetic probe, wherein the oscillating source signal injects into the magnetic part of the magnetic probe, and the magnetic detection circuit outputs a superpose superheterodyne signal; a signal conditioning circuit comparing the oscillating source signal with the superpose superheterodyne signal so as to obtain an outer magnetic field signal. The magnetic field sensor can detect high speed field change weak magnetic field in normal temperature, can detect space weak PT-level magnetic field, and can detect a space weak gradient magnetic field.

Description

technical field [0001] The present invention relates to electronic devices, and more specifically, to a magnetic probe and a magnetic field sensor including the magnetic probe. [0002] Background technique [0003] Magnetic field sensors play a vital role in modern technology and are widely used in many engineering and industrial fields, such as high-density magnetic recording, navigation, target detection and tracking, anti-theft systems, non-destructive testing, magnetic marking and labels, geomagnetic measurement , space research, magnetic field measurement on aircraft or ships, and human biomagnetic measurement. [0004] There are many kinds of magnetic field sensors, such as: inductive sensors, fluxgate sensors, Hall-effect (Hall-effect) magnetic field sensors, magneto-optical sensors, giant magnetoresistance (Giant Magneto Impedance, GMR) sensors, resonant magnetometers, superconducting quantum Interferometer (SQUID) gradiometer, TMR (Tunnel Magnetoresistance, TMR) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/09
Inventor 杨美云陈钢
Owner BEIJING CEGT SCI & TECH
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