CN107132495A - The GMI sensor probes that a kind of amorphous wire is separated with coil - Google Patents
The GMI sensor probes that a kind of amorphous wire is separated with coil Download PDFInfo
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- CN107132495A CN107132495A CN201710475014.2A CN201710475014A CN107132495A CN 107132495 A CN107132495 A CN 107132495A CN 201710475014 A CN201710475014 A CN 201710475014A CN 107132495 A CN107132495 A CN 107132495A
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- wire
- amorphous wire
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- signal pickup
- amorphous
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/063—Magneto-impedance sensors; Nanocristallin sensors
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
The invention discloses the GMI sensor probes that a kind of amorphous wire is separated with coil, including series arm and signal pickup coil, series arm includes the wire and amorphous wire of arranged in series, and signal pickup coil winding is arranged on wire.The present invention realizes the decoupling of signal pickup coil and amorphous wire, signal pickup coil be around the home around harder wire, the number of turn of signal pickup coil and around footpath compared to the traditional scheme being wound on around amorphous wire, the sensitivity of probe can be lifted.Simultaneously, by amorphous wire be individually composed probe magnetic field induct part can independent product, different exploring blocks can be made in amorphous wire of different nature, readily replaceable after nuclear interface standardizing is carried out, greatly reduce the volume and weight of probe, for the application fields such as brain-computer interface, the use comfort of subject, the barrier without search coil will be greatly enhanced, amorphous wire can be fully exposed in detected magnetic field, improve the sensitivity of amorphous wire in itself.
Description
Technical field
The present invention relates to the biological magnetic signal acquisition device of brain-computer interface technical research experiment, and in particular to a kind of amorphous wire
The GMI sensor probes separated with coil.
Background technology
In magnetic measurement field, GMI Magnetic Sensors are because of its wider measurement range, higher limiting snesibility and its side
Easy use and it is wide concerned.GMI effects are exactly when the silk or band of soft magnetic material (being generally Co bases amorphous and Fe base nanometer crystals)
Pass to alternating currentI ac When, the alternating voltage that material two ends are inductedU w With the external magnetic field added by silk longitudinal directionH ex Change and it is sensitive
The phenomenon of change, its essence is sensitive change of the impedance of non-crystalline material itself with externally-applied magnetic field.By signal acquisition coil, I
Impedance value can be converted into magnitude of voltage, so as to realize external magnetic fieldH ex Measurement.In this course, the circle of coil is gathered
Count and apart from the distance of amorphous wire（Around footpath）, it is to influence the key factor of the Key Performance Indicators such as transducer sensitivity.Such as Fig. 1 institutes
Show, traditional probe designs scheme will gather coil（Referring in Fig. 1 3. -4.）Closely it is wound on amorphous wire（Referring in Fig. 1
①-②）Surrounding.Because amorphous wire only has the diameter of some tens of pm, itself is very soft, and this design is to processing technology
Very high requirement is proposed, and is difficult to improve the coil limit number of turn and the limit around footpath.Enter one which has limited sensor sensitivity
Step is improved.In suc scheme, amorphous wire and coil are in close coupling state, once being made, and either the replacing of amorphous wire is also
It is coil turn, the adjustment around coil parameters such as footpaths, it is all extremely inconvenient, and there is a possibility that to damage amorphous wire.Meanwhile,
In amorphous wire is tightly wrapped in due to signal pickup coil, between amorphous wire and detected magnetic field signal, there is a layer line circle
Barrier, for amorphous wire sensitivity produce influence.
The content of the invention
The technical problem to be solved in the present invention：Above mentioned problem for prior art is divided there is provided a kind of amorphous wire and coil
From GMI sensor probes, the GMI sensor probes that the amorphous wire is separated with coil realize signal pickup coil and amorphous wire
It is decoupling, signal pickup coil be around the home around harder wire, the number of turn of signal pickup coil with around footpath compared to
The traditional scheme around amorphous wire is wound on, the sensitivity of probe can be lifted.Meanwhile, probe magnetic field is individually composed by amorphous wire
Induct part, can independent product, amorphous wire of different nature can be made different exploring blocks, carry out nuclear interface standardizing
Afterwards, it is very easy to be changed.This uncoupled design, greatly reduces probe（Magnetic field is inducted part）Volume and weight,
For the application fields such as brain-computer interface, the use comfort of subject will be greatly enhanced.Finally, without search coil
Barrier, amorphous wire can be fully exposed in detected magnetic field, improve the sensitivity of amorphous wire in itself.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
The GMI sensor probes that a kind of amorphous wire is separated with coil, including series arm and signal pickup coil, the series connection branch
Road includes the wire and amorphous wire of arranged in series, and the signal pickup coil winding is arranged on wire.
Preferably, the wire is iron wire.
The GMI sensor probes tool that the amorphous wire of the present invention is separated with coil has the advantage that：The present invention includes series connection branch
Road and signal pickup coil, series arm include the wire and amorphous wire of arranged in series, and signal pickup coil winding is arranged
In on wire, the decoupling of signal pickup coil and amorphous wire is realized by said structure, signal pickup coil is around the home
Around harder wire, the number of turn of signal pickup coil and around footpath compared to the traditional scheme being wound on around amorphous wire,
The sensitivity of probe can be lifted.Meanwhile, probe magnetic field is individually composed by amorphous wire and inducted part, can independent product, it is different
Different exploring blocks can be made in the amorphous wire of property, very easy to be changed after nuclear interface standardizing is carried out.This solution
The design of coupling, greatly reduces probe（Magnetic field is inducted part）Volume and weight, for the application fields such as brain-computer interface,
The use comfort of subject will be greatly enhanced.Finally, without the barrier of search coil, amorphous wire can be fully exposed to by
Detect in magnetic field, improve the sensitivity of amorphous wire in itself.
Brief description of the drawings
Fig. 1 is the GMI sensor probe configuration schematic diagrames of prior art.
Fig. 2 is the GMI sensor probe configuration schematic diagrames of the embodiment of the present invention.
Embodiment
As shown in Fig. 2 the GMI sensor probes that the amorphous wire of the present embodiment is separated with coil include series arm 1 and letter
Number pick-up winding 2, series arm 1 includes the wire 11 and amorphous wire 12 of arranged in series, and the winding of signal pickup coil 2 is arranged
In on wire 11.In measurement, the voltage signal that collection signal pickup coil 2 is obtained, is the electricity changed on amorphous wire 12
Alternating voltage of inducting produced by stream, and the electric current changed comes from amorphous wire 12 and produced because of the change of the externally-applied magnetic field of longitudinal direction
Impedance change.Therefore, real reflection externally-applied magnetic field changes, and is the electric current on amorphous wire 12.As long as can be by reasonable
Means measure this electric current, it is possible to realize measurement to externally-applied magnetic field.The amorphous wire 12 and picking up signal of the present embodiment
The GMI sensor probes that coil 2 is separated have selected the mentality of designing for being connected in series wire 11 and amorphous wire 12, by basic
Circuit general knowledge is it is recognised that under the relation of series connection, the size of current in size of current and amorphous wire 12 on wire 11 can
To be considered equal.And now, if it is possible to the size of current on wire 11 is collected by certain acquisition scheme, also
Realize the collection to current signal on amorphous wire 12.In the present embodiment, wire 11 is iron wire, has the advantages that hardness is high.
The present embodiment realizes the decoupling of signal pickup coil 2 and amorphous wire 12, signal pickup coil 2 be around the home compared with
Around hard wire 11, the number of turn of signal pickup coil 2 and around footpath compared to the traditional scheme being wound on around amorphous wire, can
To lift the sensitivity of probe.Meanwhile, probe magnetic field is individually composed by amorphous wire 12 and inducted part, can independent product, it is different
Different exploring blocks can be made in the amorphous wire 12 of property, very easy to be changed after nuclear interface standardizing is carried out.It is this
Uncoupled design, greatly reduces probe（Magnetic field is inducted part）Volume and weight, for application fields such as brain-computer interfaces
Speech, will be greatly enhanced the use comfort of subject.Finally, without the barrier of search coil, amorphous wire 12 can be fully sudden and violent
It is exposed in detected magnetic field, improves amorphous wire 12 sensitivity of itself.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (2)
1. the GMI sensor probes that a kind of amorphous wire is separated with coil, it is characterised in that：Including series arm（1）Picked up with signal
Line taking circle（2）, the series arm（1）Wire including arranged in series（11）And amorphous wire（12）, and the picking up signal
Coil（2）Winding is arranged in wire（11）On.
2. the GMI sensor probes that amorphous wire according to claim 1 is separated with coil, it is characterised in that：The metal
Silk（11）For iron wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710475014.2A CN107132495A (en) | 2017-06-21 | 2017-06-21 | The GMI sensor probes that a kind of amorphous wire is separated with coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710475014.2A CN107132495A (en) | 2017-06-21 | 2017-06-21 | The GMI sensor probes that a kind of amorphous wire is separated with coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107132495A true CN107132495A (en) | 2017-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710475014.2A Pending CN107132495A (en) | 2017-06-21 | 2017-06-21 | The GMI sensor probes that a kind of amorphous wire is separated with coil |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110693495A (en) * | 2019-09-11 | 2020-01-17 | 杭州祝和科技有限公司 | High-precision magnetic vector detection device and method |
| CN110907867A (en) * | 2019-12-13 | 2020-03-24 | 中国人民解放军国防科技大学 | Magnetic focusing device for giant magneto-impedance sensor and giant magneto-impedance sensor |
| CN113484574A (en) * | 2021-07-19 | 2021-10-08 | 深圳麦科信科技有限公司 | Differential probe and oscilloscope device |
Citations (5)
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| JP2004108778A (en) * | 2002-09-13 | 2004-04-08 | Japan Science & Technology Corp | Frequency modulated magnetic sensor |
| CN1751247A (en) * | 2003-02-21 | 2006-03-22 | 机电联合股份有限公司 | Magnetic field sensor and electrical current sensor therewith |
| CN101738587A (en) * | 2008-11-24 | 2010-06-16 | 于文杰 | Micro-magnetic sensor |
| CN203310984U (en) * | 2013-05-03 | 2013-11-27 | 中国地震局地球物理研究所 | Bridge type resistor giant magneto-impedance effect magnetic field sensor |
| CN103492895A (en) * | 2011-03-07 | 2014-01-01 | 国立大学法人名古屋大学 | Magnetic detection device |
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2017
- 2017-06-21 CN CN201710475014.2A patent/CN107132495A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004108778A (en) * | 2002-09-13 | 2004-04-08 | Japan Science & Technology Corp | Frequency modulated magnetic sensor |
| CN1751247A (en) * | 2003-02-21 | 2006-03-22 | 机电联合股份有限公司 | Magnetic field sensor and electrical current sensor therewith |
| CN101738587A (en) * | 2008-11-24 | 2010-06-16 | 于文杰 | Micro-magnetic sensor |
| CN103492895A (en) * | 2011-03-07 | 2014-01-01 | 国立大学法人名古屋大学 | Magnetic detection device |
| CN203310984U (en) * | 2013-05-03 | 2013-11-27 | 中国地震局地球物理研究所 | Bridge type resistor giant magneto-impedance effect magnetic field sensor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110693495A (en) * | 2019-09-11 | 2020-01-17 | 杭州祝和科技有限公司 | High-precision magnetic vector detection device and method |
| CN110907867A (en) * | 2019-12-13 | 2020-03-24 | 中国人民解放军国防科技大学 | Magnetic focusing device for giant magneto-impedance sensor and giant magneto-impedance sensor |
| CN110907867B (en) * | 2019-12-13 | 2022-03-22 | 中国人民解放军国防科技大学 | Magnetic focusing device for giant magneto-impedance sensor and giant magneto-impedance sensor |
| CN113484574A (en) * | 2021-07-19 | 2021-10-08 | 深圳麦科信科技有限公司 | Differential probe and oscilloscope device |
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Application publication date: 20170905 |
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| RJ01 | Rejection of invention patent application after publication |