CN105137370A - Low power consumption miniature fluxgate sensor - Google Patents
Low power consumption miniature fluxgate sensor Download PDFInfo
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- CN105137370A CN105137370A CN201510533574.XA CN201510533574A CN105137370A CN 105137370 A CN105137370 A CN 105137370A CN 201510533574 A CN201510533574 A CN 201510533574A CN 105137370 A CN105137370 A CN 105137370A
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- iron core
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Abstract
The invention discloses a low power consumption miniature fluxgate sensor which comprises a probe and an interface circuit. The probe comprises an excitation coil, a porous iron core and an induction coil. The interface circuit comprises an excitation circuit and a detection circuit. The excitation coil and the induction coil alternately carry out winding. The excitation coil is arranged at a nonporous position of the porous iron core. The induction coil is arranged at a pored position of the porous iron core. The excitation coil and the induction coil share the same number of turns. The excitation circuit is used for providing saturation current for the iron core. The detection circuit is used for detecting voltage change induced in the induction coil. The excitation coil imports alternating current. The porous iron core is circular or U-shaped. The porous iron core is made of nickel-iron. The excitation coil and the induction coil are made of copper. According to the invention, excitation current is effectively reduced; the work power consumption of a miniature fluxgate is reduced; and the sensitivity of the miniature fluxgate is improved.
Description
Technical field
The present invention relates to sensor technical field, the micro fluxgate sensor of particularly a kind of low-power consumption.
Background technology
Fluxgate sensor utilizes in tested magnetic field that high conducting magnet core is under the saturation activation of alternating magnetic field, and the nonlinear relationship of its magnetic induction density and magnetic field intensity measures a kind of sensor of low-intensity magnetic field.Compared with other types magnetic measurement apparatus, fluxgate sensor have resolving power high, measure low-intensity magnetic field wide ranges, reliable, the component that directly can measure magnetic field and be suitable for features such as using in fast kinematic system.Some the asymmetrical modulating action utilizing external magnetic field to produce the output signal of this special transformer, any one change detecting the output signal that these modulating actions cause realizes the measurement of external magnetic field.General ferromagnet is all use Co base alloy, but Fe-based amorphous alloy also has high saturated magnetic induction and low-loss, the feature of extremely strong decay resistance and good soft magnet performance.As the probe magnetic core of fluxgate sensor, prepare magnetic flux door sensor probe, have studied the impact on sensor sensitivity of the Technology for Heating Processing of magnetic core, sonde configuration and external condition, for the design of fluxgate magnetic core provides experimental basis.
Fluxgate sensor is a kind of low frequency Vector Magnetic Field measuring element with the excellent comprehensive performance such as high sensitivity, high stability, is widely used in national defence and industrial circle.In recent years, have benefited from Wei Ji electricity Xi Tong ﹙ micro-electromechanicalsystems, the development of MEMS ﹚ technology, the micro flux-gate made on a silicon substrate because its volume is little, lightweight, with the feature such as peripheral circuit integration is good, show great development potentiality in the fields such as type/picosatellite, SUAV (small unmanned aerial vehicle), parallel machine people of receiving.Owing to needing iron core to reach capacity when fluxgate works, so, although the device size of silicon-base miniature fluxgate reduces greatly, but power consumption does not significantly reduce along with the reduction of volume, this makes a large amount of heats concentrate on the comparatively small size of film iron core, bring great impact to the noise of whole device, life-span, therefore, reducing power consumption is micro flux-gate problem demanding prompt solution.The people such as WuPeiming utilize finite element software to emulate micro flux-gate, optimization has to a certain degree been carried out to its core structure, devise the micro flux-gate of a kind of contracting than structure iron core, although biosensor power consumption can be reduced to a certain extent, but owing to there is larger leakage flux, still await further improvement.
Application number is the miniature quadrature excitation fluxgate sensor of 201310380162.8, adopt quadrature excitation mode of operation, there is many groups of excitation lines and the iron core of S-type arrangement, there is segment core structure, have the closely-coupled three-dimensional spiral line tubular construction inductive coil with iron core, the connected component between the levels of three-dimensional spiral line pipeline circle is made up of multiple bonding conductor.This patented claim solves the low technical matters of existing fluxgate sensor sensitivity, but still has that power consumption is large, unstable, baroque shortcoming.
Application number is the same some triaxial fluxgate magnetometer of 201210099576.9, disclose a kind of with putting triaxial fluxgate magnetometer, comprise aluminium shell, be arranged on circuit board, the magnetic core in described aluminium shell, ceramic skeleton and the coil be wound on ceramic skeleton, three corresponding three components of sensor; This technical scheme achieves the symmetric configuration of each sensor, reduces the measuring error that sensor causes, but still there is the large problem of power consumption.
How to solve the deficiencies in the prior art and become a great problem that sensor technical field needs solution badly.
Summary of the invention
Technical matters to be solved by this invention is the micro fluxgate sensor providing a kind of low-power consumption in order to overcome the deficiencies in the prior art, and the present invention effectively reduces exciting current, reduces the operating power consumption of micro flux-gate, improves the sensitivity of micro flux-gate.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
According to the micro fluxgate sensor of a kind of low-power consumption that the present invention proposes, comprise probe and interface circuit, described probe comprises drive coil, porous iron core and inductive coil, and described interface circuit comprises field circuit and testing circuit; Wherein, drive coil and inductive coil replace coiling, drive coil be arranged on porous iron core without hole site, inductive coil is arranged on, and porous iron core has hole site, the equal turn numbers of drive coil and inductive coil; Described field circuit is used to provide the electric current that iron core is reached capacity, and testing circuit is used for detecting the change in voltage induced in inductive coil.
As the further prioritization scheme of micro fluxgate sensor of a kind of low-power consumption of the present invention, described drive coil imports alternating current.
As the further prioritization scheme of micro fluxgate sensor of a kind of low-power consumption of the present invention, the shape of described porous iron core is circular or annular or U-shaped.
As the further prioritization scheme of micro fluxgate sensor of a kind of low-power consumption of the present invention, the material of described porous iron core is ferronickel.
As the further prioritization scheme of micro fluxgate sensor of a kind of low-power consumption of the present invention, the material of described drive coil, inductive coil is copper.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
(1) iron core of the porous structure in the present invention effectively reduces exciting current, reduces the operating power consumption of micro flux-gate;
(2) the present invention effectively improves its overall performance, guarantees that fluxgate sensor can be stablized and reliably working;
(3) improve the sensitivity of micro flux-gate and structure is simple.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Reference numeral in figure is interpreted as: 1-porous iron core.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
As shown in Figure 1, a kind of micro fluxgate sensor of low-power consumption, comprise probe and interface circuit, described probe comprises drive coil, porous iron core 1 and inductive coil, and described interface circuit comprises field circuit and testing circuit; Wherein, drive coil and inductive coil replace coiling, drive coil be arranged on porous iron core without hole site, inductive coil is arranged on, and porous iron core has hole site, the equal turn numbers of drive coil and inductive coil; Described field circuit is used to provide the electric current that iron core is reached capacity, and testing circuit is used for detecting the change in voltage induced in inductive coil.
Described drive coil imports alternating current.
The shape of described porous iron core is circular or annular or U-shaped.
The material of described porous iron core is ferronickel.
The material of described drive coil, inductive coil is copper.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
(1) iron core of the porous structure in the present invention effectively reduces exciting current, reduces the operating power consumption of micro flux-gate;
(2) the present invention effectively improves its overall performance, guarantees that fluxgate sensor can be stablized and reliably working;
(3) improve the sensitivity of micro flux-gate and structure is simple.
Simulation results show: porous iron core can make micro flux-gate work under less saturation activation electric current, improves micro flux-gate sensitivity.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention for this reason, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.
Claims (5)
1. a micro fluxgate sensor for low-power consumption, is characterized in that, comprise probe and interface circuit, described probe comprises drive coil, porous iron core and inductive coil, and described interface circuit comprises field circuit and testing circuit; Wherein, drive coil and inductive coil replace coiling, drive coil be arranged on porous iron core without hole site, inductive coil is arranged on, and porous iron core has hole site, the equal turn numbers of drive coil and inductive coil; Described field circuit is used to provide the electric current that iron core is reached capacity, and testing circuit is used for detecting the change in voltage induced in inductive coil.
2. the micro fluxgate sensor of a kind of low-power consumption according to claim 1, is characterized in that, described drive coil imports alternating current.
3. the micro fluxgate sensor of a kind of low-power consumption according to claim 1, is characterized in that, the shape of described porous iron core is circular or annular or U-shaped.
4. the micro fluxgate sensor of a kind of low-power consumption according to claim 1, is characterized in that, the material of described porous iron core is ferronickel.
5. the micro fluxgate sensor of a kind of low-power consumption according to claim 1, is characterized in that, the material of described drive coil, inductive coil is copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510533574.XA CN105137370A (en) | 2015-08-27 | 2015-08-27 | Low power consumption miniature fluxgate sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510533574.XA CN105137370A (en) | 2015-08-27 | 2015-08-27 | Low power consumption miniature fluxgate sensor |
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| Publication Number | Publication Date |
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| CN105137370A true CN105137370A (en) | 2015-12-09 |
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| CN201510533574.XA Pending CN105137370A (en) | 2015-08-27 | 2015-08-27 | Low power consumption miniature fluxgate sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950441A (en) * | 2017-02-15 | 2017-07-14 | 西安交通大学 | A kind of sensor for on-line checking transformer DC magnetic bias |
| CN109884559A (en) * | 2018-12-05 | 2019-06-14 | 云南师范大学 | A kind of orthogonal fluxgate sensor of grid shape iron core |
| CN111123178A (en) * | 2020-01-20 | 2020-05-08 | 河南理工大学 | Bamboo-shaped structure low-power-consumption fluxgate sensor |
| CN114999762A (en) * | 2022-06-09 | 2022-09-02 | 河南理工大学 | Soft magnetic film iron core, preparation method thereof and sensor |
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| CN1444237A (en) * | 2002-03-13 | 2003-09-24 | 三星电机株式会社 | Fluxgate sensor integrated in printed circuit board and its making method |
| DE102007032299A1 (en) * | 2007-07-11 | 2009-01-15 | Siemens Ag | Sensor used especially for magnetic field measurement comprises a flux gate sensor consisting of an excitation coil, an induction coil and a magnetic core of alternating soft magnetic layers and antiferromagnetic layers |
| CN101604966A (en) * | 2009-07-10 | 2009-12-16 | 西北工业大学 | Exciting circuit of flux gate sensor |
| CN201435719Y (en) * | 2009-07-10 | 2010-03-31 | 西北工业大学 | Fluxgate sensor excitation circuit of single operational amplifier |
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| CN103439674A (en) * | 2013-08-27 | 2013-12-11 | 西北工业大学 | Minitype orthogonal exciting fluxgate sensor |
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| CN1444237A (en) * | 2002-03-13 | 2003-09-24 | 三星电机株式会社 | Fluxgate sensor integrated in printed circuit board and its making method |
| DE102007032299A1 (en) * | 2007-07-11 | 2009-01-15 | Siemens Ag | Sensor used especially for magnetic field measurement comprises a flux gate sensor consisting of an excitation coil, an induction coil and a magnetic core of alternating soft magnetic layers and antiferromagnetic layers |
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| CN102401853A (en) * | 2011-11-28 | 2012-04-04 | 河北工业大学 | Double-shaft fluxgate current sensor |
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| CN103439674A (en) * | 2013-08-27 | 2013-12-11 | 西北工业大学 | Minitype orthogonal exciting fluxgate sensor |
| CN104808157A (en) * | 2015-04-11 | 2015-07-29 | 西北工业大学 | Orthogonal flux-gate sensor with printed circuit board |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950441A (en) * | 2017-02-15 | 2017-07-14 | 西安交通大学 | A kind of sensor for on-line checking transformer DC magnetic bias |
| CN109884559A (en) * | 2018-12-05 | 2019-06-14 | 云南师范大学 | A kind of orthogonal fluxgate sensor of grid shape iron core |
| CN111123178A (en) * | 2020-01-20 | 2020-05-08 | 河南理工大学 | Bamboo-shaped structure low-power-consumption fluxgate sensor |
| CN114999762A (en) * | 2022-06-09 | 2022-09-02 | 河南理工大学 | Soft magnetic film iron core, preparation method thereof and sensor |
| CN114999762B (en) * | 2022-06-09 | 2023-05-02 | 河南理工大学 | Soft magnetic film iron core, preparation method thereof and sensor |
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