CN105068026A - Fluxgate sensor - Google Patents

Fluxgate sensor Download PDF

Info

Publication number
CN105068026A
CN105068026A CN201510533515.2A CN201510533515A CN105068026A CN 105068026 A CN105068026 A CN 105068026A CN 201510533515 A CN201510533515 A CN 201510533515A CN 105068026 A CN105068026 A CN 105068026A
Authority
CN
China
Prior art keywords
resistance
operational amplifier
iron core
coil
electric capacity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510533515.2A
Other languages
Chinese (zh)
Inventor
尤为
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuxi Epic Technology Co Ltd
Original Assignee
Wuxi Epic Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuxi Epic Technology Co Ltd filed Critical Wuxi Epic Technology Co Ltd
Priority to CN201510533515.2A priority Critical patent/CN105068026A/en
Publication of CN105068026A publication Critical patent/CN105068026A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measuring Magnetic Variables (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

Disclosed in the invention is a fluxgate sensor comprising a probe and an interference circuit. The probe contains an excitation coil, a porous iron core and an induction coil. And the interference circuit includes an excitation circuit and a detection circuit. The excitation coil and the induction coil are wound alternately; the excitation coil is arranged at a pore-free position of the porous iron core; and the induction coil is arranged at a pore-contained position of the porous iron core, wherein the numbers of turns of the excitation coil and the induction coil are equal. The excitation circuit is used for providing a current enabling the iron core to be in a saturation state; and the detection circuit is used for detecting a voltage change induced in the induction coil. The excitation circuit consists of a power supply, first to seventh resistors, a sliding rheostat, a first capacitor, a second capacitor, and first to third operational amplifiers. According to the invention, the excitation currents can be effectively reduced; the working power consumption of the micro fluxgate can be reduced; and sensitivity of the micro fluxgate can be improved.

Description

A kind of fluxgate sensor
Technical field
The present invention relates to sensor technical field, particularly a kind of fluxgate sensor.
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 provides a kind of fluxgate sensor 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, improve 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 a kind of fluxgate sensor 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;
Described field circuit comprises power supply, the first to the 7th resistance, slide rheostat, the first electric capacity, the second electric capacity, the first to the 3rd operational amplifier, wherein, one end of first resistance and power supply, one end of second resistance connects respectively, the other end of the first resistance and one end of the first electric capacity, the inverting input of the first operational amplifier connects respectively, the in-phase input end of the first operational amplifier is connected with one end of the 3rd resistance, the other end ground connection of the 3rd resistance, the other end of the first electric capacity and the output terminal of the first operational amplifier, one end of 6th resistance connects respectively, the other end of the 6th resistance and the inverting input of the 3rd operational amplifier, one end of 7th resistance, one end of slide rheostat connects respectively, the other end of the second resistance is connected with one end of the second electric capacity, the other end of the second electric capacity and the inverting input of the second operational amplifier, one end of 4th resistance connects respectively, the in-phase input end of the second operational amplifier is connected with one end of the 5th resistance, the other end ground connection of the 5th resistance, the output terminal of the second operational amplifier and the other end of the 4th resistance, the other end of slide rheostat connects respectively, the in-phase input end ground connection of the 3rd operational amplifier, the output terminal of the 3rd operational amplifier is connected with the other end of the 7th resistance.
As the further prioritization scheme of a kind of fluxgate sensor of the present invention, described drive coil imports alternating current.
As the further prioritization scheme of a kind of fluxgate sensor of the present invention, the shape of described porous iron core is circular or annular or U-shaped.
As the further prioritization scheme of a kind of fluxgate sensor of the present invention, the material of described porous iron core is ferronickel.
As the further prioritization scheme of a kind of fluxgate sensor 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 drawing of the present invention.
Fig. 2 is field circuit figure.
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 fluxgate sensor, 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.
Be field circuit figure as shown in Figure 2, described field circuit comprises power supply, the first to the 7th resistance R 1-R 7, slide rheostat R 8, the first electric capacity C 1, the second electric capacity C 2, the first to the 3rd operational amplifier A 1-A 3, wherein, one end of first resistance and power supply, one end of second resistance connects respectively, the other end of the first resistance and one end of the first electric capacity, the inverting input of the first operational amplifier connects respectively, the in-phase input end of the first operational amplifier is connected with one end of the 3rd resistance, the other end ground connection of the 3rd resistance, the other end of the first electric capacity and the output terminal of the first operational amplifier, one end of 6th resistance connects respectively, the other end of the 6th resistance and the inverting input of the 3rd operational amplifier, one end of 7th resistance, one end of slide rheostat connects respectively, the other end of the second resistance is connected with one end of the second electric capacity, the other end of the second electric capacity and the inverting input of the second operational amplifier, one end of 4th resistance connects respectively, the in-phase input end of the second operational amplifier is connected with one end of the 5th resistance, the other end ground connection of the 5th resistance, the output terminal of the second operational amplifier and the other end of the 4th resistance, the other end of slide rheostat connects respectively, the in-phase input end ground connection of the 3rd operational amplifier, the output terminal of the 3rd operational amplifier is connected with the other end of the 7th resistance.
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 fluxgate sensor, 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;
Described field circuit comprises power supply, the first to the 7th resistance, slide rheostat, the first electric capacity, the second electric capacity, the first to the 3rd operational amplifier, wherein, one end of first resistance and power supply, one end of second resistance connects respectively, the other end of the first resistance and one end of the first electric capacity, the inverting input of the first operational amplifier connects respectively, the in-phase input end of the first operational amplifier is connected with one end of the 3rd resistance, the other end ground connection of the 3rd resistance, the other end of the first electric capacity and the output terminal of the first operational amplifier, one end of 6th resistance connects respectively, the other end of the 6th resistance and the inverting input of the 3rd operational amplifier, one end of 7th resistance, one end of slide rheostat connects respectively, the other end of the second resistance is connected with one end of the second electric capacity, the other end of the second electric capacity and the inverting input of the second operational amplifier, one end of 4th resistance connects respectively, the in-phase input end of the second operational amplifier is connected with one end of the 5th resistance, the other end ground connection of the 5th resistance, the output terminal of the second operational amplifier and the other end of the 4th resistance, the other end of slide rheostat connects respectively, the in-phase input end ground connection of the 3rd operational amplifier, the output terminal of the 3rd operational amplifier is connected with the other end of the 7th resistance.
2. a kind of fluxgate sensor according to claim 1, is characterized in that, described drive coil imports alternating current.
3. a kind of fluxgate sensor according to claim 1, is characterized in that, the shape of described porous iron core is circular or annular or U-shaped.
4. a kind of fluxgate sensor according to claim 1, is characterized in that, the material of described porous iron core is ferronickel.
5. a kind of fluxgate sensor according to claim 1, is characterized in that, the material of described drive coil, inductive coil is copper.
CN201510533515.2A 2015-08-27 2015-08-27 Fluxgate sensor Pending CN105068026A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510533515.2A CN105068026A (en) 2015-08-27 2015-08-27 Fluxgate sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510533515.2A CN105068026A (en) 2015-08-27 2015-08-27 Fluxgate sensor

Publications (1)

Publication Number Publication Date
CN105068026A true CN105068026A (en) 2015-11-18

Family

ID=54497441

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510533515.2A Pending CN105068026A (en) 2015-08-27 2015-08-27 Fluxgate sensor

Country Status (1)

Country Link
CN (1) CN105068026A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108761357A (en) * 2018-04-22 2018-11-06 成都理工大学 Fluxgate sensor feedback coil
CN109612503A (en) * 2018-12-03 2019-04-12 重庆文理学院 A kind of magnet exciting coil driving device of Magnetic Sensor

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN201435720Y (en) * 2009-07-10 2010-03-31 西北工业大学 Fluxgate sensor excitation circuit with in-phase differentiator
CN201435719Y (en) * 2009-07-10 2010-03-31 西北工业大学 Fluxgate sensor excitation circuit of single operational amplifier
CN201435721Y (en) * 2009-07-10 2010-03-31 西北工业大学 Fluxgate sensor excitation circuit with inverter and inverting differentiator
CN102401853A (en) * 2011-11-28 2012-04-04 河北工业大学 Double-shaft fluxgate current sensor
CN102645641A (en) * 2012-04-05 2012-08-22 上海海碧电子科技有限公司 Fluxgate sensor with three components on same point
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
CN104820196A (en) * 2015-04-11 2015-08-05 西北工业大学 Low-power consumption fluxgate sensor of n-shaped structure

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN201435720Y (en) * 2009-07-10 2010-03-31 西北工业大学 Fluxgate sensor excitation circuit with in-phase differentiator
CN201435719Y (en) * 2009-07-10 2010-03-31 西北工业大学 Fluxgate sensor excitation circuit of single operational amplifier
CN201435721Y (en) * 2009-07-10 2010-03-31 西北工业大学 Fluxgate sensor excitation circuit with inverter and inverting differentiator
CN102401853A (en) * 2011-11-28 2012-04-04 河北工业大学 Double-shaft fluxgate current sensor
CN102645641A (en) * 2012-04-05 2012-08-22 上海海碧电子科技有限公司 Fluxgate sensor with three components on same point
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
CN104820196A (en) * 2015-04-11 2015-08-05 西北工业大学 Low-power consumption fluxgate sensor of n-shaped structure

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
吕辉等: "微型磁通门传感器的低功耗结构设计", 《传感器与微系统》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108761357A (en) * 2018-04-22 2018-11-06 成都理工大学 Fluxgate sensor feedback coil
CN109612503A (en) * 2018-12-03 2019-04-12 重庆文理学院 A kind of magnet exciting coil driving device of Magnetic Sensor

Similar Documents

Publication Publication Date Title
CN103308743B (en) Direct current metering device
CN202886483U (en) Low-frequency large-capacitance measuring device
CN110927428B (en) Wide-range wide-band high-precision magnetic balance type current measuring device
CN107064593B (en) A kind of electronic mutual inductor suitable for gas insulated transformer substation Super-Current Measurement
CN103575960A (en) Giant magnetoresistance effect current sensor
CN106443196B (en) A kind of measuring system and method for electrode grounding resistance
CN105137370A (en) Low power consumption miniature fluxgate sensor
WO2019242322A1 (en) Detection coil, detection device, and detection system
CN105606963B (en) A kind of test circuit leaking high-frequency current for measuring cable
CN105846914A (en) Wireless magnetic induction through-the-earth communication device and communication method
CN201331328Y (en) Barrel-shaped movable coil angle sensor
CN101349151B (en) Three-stage graduation apparatus of electromagnetic wave logger
CN105068026A (en) Fluxgate sensor
CN105842511A (en) Dual-coil anti-magnetic-type current transformer
CN101329408B (en) Receiver of underground metal pipeline detector
CN203535102U (en) Colossal magnetoresistance effect current sensor
CN114675064A (en) High-precision double-range fluxgate current sensor
CN203204135U (en) U type single magnetic core magnetic flux gate probe
CN101520495A (en) Device for mapping magnetizing characteristic curve of ferromagnetic materials and mapping method thereof
CN201477201U (en) Static magnetic property measuring instrument
CN204269715U (en) A kind of AC current detection device based on Luo-coil
CN106405189A (en) Current sensor with temperature stability and measuring method thereof
CN203720232U (en) Current detection device of switch power supply
CN105588970A (en) Fault current detection device
CN204008813U (en) A kind of magnetic modulation type current transformer

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20151118