CN104282072B - Magnetic modulating device and Magnetic Sensor - Google Patents
Magnetic modulating device and Magnetic Sensor Download PDFInfo
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- CN104282072B CN104282072B CN201310275144.3A CN201310275144A CN104282072B CN 104282072 B CN104282072 B CN 104282072B CN 201310275144 A CN201310275144 A CN 201310275144A CN 104282072 B CN104282072 B CN 104282072B
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Abstract
The present invention provides a kind of magnetic modulating device, for modulating the Distribution of Magnetic Field of permanent magnet, it is characterized in that, modulation arm including 2n magnetic conduction, n is the integer more than or equal to 2, the 2n modulation arm, which is successively spaced, to be oppositely arranged, so as to form an accommodation space between the adjacent modulation arm of any two, the 2n modulation arm forms the 2n-1 accommodation spaces；One of adjacent described accommodation space of any two is equipped with the permanent magnet；The modulation arm is to eliminate or reduce horizontal component of the magnetic field of the permanent magnet in the accommodation space of not set permanent magnet.Horizontal component and inhibition ambient noise of the magnetic field in first receiving space of the permanent magnet can be eliminated or be reduced to the magnetic modulating device.The present invention also provides a kind of Magnetic Sensors.
Description
Technical field
The invention belongs to fine measuring instruments, and in particular to one kind can change the magnetic modulating device of Distribution of Magnetic Field and answer
With the Magnetic Sensor of the magnetic modulating device.
Background technique
Magnetic Sensor is widely used in cash inspecting machine, ATM machine and identifies in instrument, for distinguishing in it equipped with anti-fake
The true and false of bank note, bill, the trade mark of mark etc..In order to improve anti-counterfeit capability, in bank note, bill, trade mark etc., it is not only provided with hard
Magnetic anti-counterfeiting mark, and it is equipped with soft magnetism anti-counterfeiting mark.Wherein, soft magnetism anti-counterfeiting mark is super very magnetic, itself do not have it is magnetic or
It is magnetic very weak, but instantaneous magnetism can be obtained quickly after being magnetized, to generate the magnetic field that can be incuded by Magnetic Sensor.?
Need to be arranged the permanent magnet of premagnetization weak magnetic anti-counterfeiting mark in Magnetic Sensor.However, in use, being arranged attached in magnetic chip
Inevitably there is horizontal component in the magnetic field that close permanent magnet generates, which seriously reduces the sensitive of Magnetic Sensor
Degree.Meanwhile other magnetic fields in external environment can also generate horizontal component, which also can serious reduction Magnetic Sensor
Sensitivity.Therefore, it is necessary to the horizontal component in magnetic field be eliminated and reduce as far as possible, to prevent its shadow to magnetic chip sensitivity
It rings.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of magnetic modulation for drawbacks described above present in Magnetic Sensor
Device can improve the Distribution of Magnetic Field of permanent magnet, reduce, even be eliminated the horizontal component of magnetic field of permanent magnet.
The present invention also provides a kind of Magnetic Sensor, the influence that can be reduced, even be eliminated magnetic field of permanent magnet to magnetic chip,
To improve the sensitivity of Magnetic Sensor.
For this purpose, the present invention provides a kind of magnetic modulating device, for modulating the Distribution of Magnetic Field of permanent magnet, including 2n magnetic conduction
Modulation arm, n are the integer more than or equal to 2, and the 2n modulation arm, which is successively spaced, to be oppositely arranged, so that any two are adjacent
An accommodation space is formed between the modulation arm, the 2n modulation arm forms the 2n-1 accommodation spaces；Any two phase
One of adjacent described accommodation space is equipped with the permanent magnet；The modulation arm exists to eliminate or reduce the magnetic field of the permanent magnet
Horizontal component in the accommodation space of not set permanent magnet.
It wherein, further include a connector, the 2n modulation arm is connected as one by the connector, and the 2n tune
Arm processed is located at the ipsilateral of the connector.
It wherein, further include m connector, the 2n modulation arm is divided into the equal or unequal m group of quantity, the m company
The m group modulation arm is correspondingly connected with by junctor, the integer of m >=2.
Wherein, the modulation arm extends to form modulation auxiliary to the other side of the connector.
Wherein, the opposite sides for forming described two modulation arms of the accommodation space be respectively set or in which one of setting it is convex
Portion.
Wherein, the top of the 2n modulation arm flushes, and the top of the permanent magnet is not higher than the top of the modulation arm.
Wherein, the magnetic modulating device is structure as a whole, or is formed by multiple laminated structures are stacked.
Wherein, the permanent magnet is structure as a whole, or is formed by multiple laminated structures are stacked.
Wherein, the magnetic conduction arm is made of permeability magnetic material, or is made of non-magnet material, and shows to coat magnetic conduction at it
Material layer.
Wherein, the permeability magnetic material includes permalloy or ferrite or silicon steel sheet.
The present invention also provides a kind of Magnetic Sensors, comprising:
Magnetic chip, for incuding the magnetic field of anti-counterfeiting mark；
Wiring board is used to support and is electrically connected the input/output terminal of the magnetic chip；
Capillary passes through the input/output terminal of the wiring board and the magnetic chip as the input/output terminal of Magnetic Sensor
Corresponding electrical connection；
Permanent magnet is used for premagnetization weak magnetic anti-counterfeiting mark；
It further include magnetic modulating device, for adjusting the Distribution of Magnetic Field of the permanent magnet；
The magnetic modulating device includes the modulation arm of 2n magnetic conduction, and n is the integer more than or equal to 2；The 2n modulation
Arm is successively spaced and is oppositely arranged, so as to an accommodation space is formed between the adjacent modulation arm of any two, the 2n tune
Arm processed forms the 2n-1 accommodation spaces；It is counted from accommodation space described in outermost, is counted as the accommodation space of odd numbers
Permanent magnet is set, and the magnetic chip is arranged in the accommodation space for being counted as even numbers；The modulation arm is to eliminate or reduce institute
State horizontal component of the magnetic field of permanent magnet in the accommodation space where the magnetic chip.
Wherein, the magnetic modulating device further includes a connector, and the 2n modulation arm is connected as one by the connector
Body, and the 2n modulation arm is located at the ipsilateral of the connector.
Wherein, the magnetic modulating device further includes m connector, and it is equal or unequal that the 2n modulation arm is divided into quantity
The m group modulation arm is correspondingly connected with by m group, the m connector, the integer of m >=2.
Wherein, the n be 2, i.e., the described magnetic modulating device include the first modulation arm, the second modulation arm, third modulation arm and
The opposite sides of 4th modulation arm, first modulation arm and second modulation arm form first receiving space, and described second adjusts
The opposite sides of arm processed and the third modulation arm the second accommodation space of formation, the third modulation arm and the 4th modulation arm
Opposite sides form third accommodation space；The magnetic chip is set to second accommodation space, and the permanent magnet is set to described first
Accommodation space and the third accommodation space.
Wherein, the magnetic modulating device further includes connector, and the connector adjusts first modulation arm, described second
Arm, the third modulation arm and the 4th modulation arm processed are connected as one, and first modulation arm, second modulation
Arm, the third modulation arm and the 4th modulation arm are located at the ipsilateral of the connector.
Wherein, the magnetic modulating device further includes two connectors, and described two connectors are modulated described first respectively
Arm and second modulation arm are connected as one, and the third modulation arm and the 4th modulation arm are connected as one
Body structure, and first modulation arm, second modulation arm, the third modulation arm and the 4th modulation arm are positioned at described
Connector it is ipsilateral.
Wherein, first modulation arm and the 4th modulation arm extend to form each formation to the other side of the connector
One modulation auxiliary.
Wherein, the n is 3, i.e., the described magnetic modulating device includes the first modulation arm, the second modulation arm, third modulation arm, the
Four modulation arms, the 5th modulation arm and the 6th modulation arm, the opposite sides of first modulation arm and second modulation arm form the
The opposite sides of one accommodation space, second modulation arm and the third modulation arm form the second accommodation space, the third tune
The opposite sides of arm processed and the 4th modulation arm formation third accommodation space, the 4th modulation arm and the 5th modulation arm
Opposite sides form the 4th accommodation space, and the opposite sides formation the 5th of the 5th modulation arm and the 6th modulation arm accommodates empty
Between,
The permanent magnet is set to the first receiving space, the third accommodation space and the 5th accommodation space；Institute
Magnetic chip is stated set on second accommodation space and the 4th accommodation space.
Wherein, the magnetic modulating device further includes connector, and the connector adjusts first modulation arm, described second
Arm, the third modulation arm, the 4th modulation arm, the 5th modulation arm and the 6th modulation arm processed are connected as one,
And first modulation arm, second modulation arm, the third modulation arm, the 4th modulation arm, the 5th modulation arm
It is located at the ipsilateral of the connector with the 6th modulation arm.
Wherein, the magnetic modulating device further includes two connectors, and the connector is respectively by first modulation arm, institute
State the second modulation arm and the third modulation arm be connected as one, and by the 4th modulation arm, the 5th modulation arm and
6th modulation arm is connected as one, first modulation arm, second modulation arm, the third modulation arm, described
Four modulation arms, the 5th modulation arm and the 6th modulation arm are located at the ipsilateral of the connector.
Wherein, first modulation arm and the 6th modulation arm extend each formation to the other side of the connector respectively
One modulation auxiliary.
Wherein, the opposite sides setting of the modulation arm corresponding to the accommodation space that the permanent magnet is arranged is convex
Portion, and/or, protrusion is arranged in the opposite sides of the modulation arm corresponding to the accommodation space that the magnetic chip is arranged.
Wherein, the magnetic modulating device is structure as a whole, or is stacked and is formed by the thin slice of multiple sheets.
Wherein, the permanent magnet is structure as a whole, or is formed by multiple laminated structures are stacked.
Wherein, the magnetic conduction arm is made of permeability magnetic material, or is made of non-magnet material, and shows to coat magnetic conduction at it
Material layer.
Wherein, the permeability magnetic material includes permalloy or ferrite or silicon steel sheet.
Wherein, including shell, it is equipped with window, the magnetic chip, the wiring board and magnetic modulation on the housing
Device is set in the shell, and the magnetic chip, the magnetic modulating device and the permanent magnet are opposite with the window, the weldering
One end of needle is stretched out from the shell；
The wiring board is equipped with the through-hole passed through for the modulation arm, and the modulation arm is by the through-hole from the route
The top of the wiring board is stretched out below plate upwards.
Wherein, the magnetic chip includes inductive magnetic thin film and chip bonding pad and the support inductive magnetic thin film and chip bonding pad
Chip basal body, the chip bonding pad as the chip input/output terminal it is corresponding with the magnetic induction film electrical connection；
The magnetic susceptibility film is Hall effect film, anisotropic magnetoresistance film, giant magnet resistance film, tunnel magneto resistance
Film, giant magnetoresistance films or giant Hall effect film.
The invention has the following advantages:
Distribution of Magnetic Field around the adjustable permanent magnet of magnetic modulating device provided by the invention, i.e., use up the magnetic field of permanent magnet
Conduction in modulation arm is possibly constrained in, makes permanent magnet perpendicular to the magnetic-field component on the sensitive surface direction of magnetic chip to outgoing
Out, inhibit the horizontal component in its magnetic field by modulation arm, to eliminate or reduce influence of the permanent magnet to magnetic chip sensitivity；Together
When, modulation arm is also used as protecting wall, avoids or reduce external environment magnetic field entering accommodation space, work with noise suppression
With.
Magnetic Sensor provided by the invention adjusts the Distribution of Magnetic Field of permanent magnet by magnetic modulating device, i.e., by the magnetic of permanent magnet
Field constrains in conduction in modulation arm as much as possible, to make permanent magnet perpendicular to the magnetic-field component on the sensitive surface direction of magnetic chip
It sends out, to carry out premagnetization effect, while the horizontal component in magnetic field is inhibited by modulation arm, to avoid or reduce permanent magnet
Influence to magnetic chip sensitivity, and then improve the sensitivity of Magnetic Sensor；Simultaneously modulation arm can be used as protecting wall, avoid or
Reduce interference of the external environment magnetic field to magnetic chip, that is, inhibits the effect of noise, to improve the anti-interference ability of Magnetic Sensor；
In addition, modulation arm can also be used to protecting magnetic chip and be conducive to control between magnetic chip magnetic induction face and detected medium away from
From to improve the consistency of Magnetic Sensor.
Detailed description of the invention
Fig. 1 a is the structural schematic diagram of Magnetic Sensor of the embodiment of the present invention；
Fig. 1 b is the exploded view of Magnetic Sensor of the embodiment of the present invention；
When Fig. 2 is the second accommodation space and third accommodation space that permanent magnet is set to magnetic modulating device by the embodiment of the present invention
The distribution map in magnetic field；
Fig. 3 a is the structural schematic diagram of another magnetic modulating device of the embodiment of the present invention；
Fig. 3 b is the structural schematic diagram of another magnetic modulating device of the embodiment of the present invention；
Fig. 3 c is the structural schematic diagram of the another magnetic modulating device of the embodiment of the present invention；
Fig. 4 is the structural schematic diagram of Magnetic Sensor of the embodiment of the present invention；
Fig. 5 a is the structural schematic diagram of another embodiment of the present invention Magnetic Sensor；
Fig. 5 b is the outline drawing of Magnetic Sensor shown in Fig. 5 a；
Fig. 5 c is the exploded view of the part-structure of Magnetic Sensor shown in Fig. 5 a.
Specific embodiment
To make those skilled in the art more fully understand technical solution of the present invention, the present invention is mentioned with reference to the accompanying drawing
The magnetic modulating device and Magnetic Sensor of confession are described in detail.
As illustrated in figs. 1A and ib, Magnetic Sensor includes shell 1, magnetic chip 2, wiring board 3, permanent magnet 4, magnetic modulating device
5 and capillary 6, magnetic chip 2, wiring board 3, permanent magnet 4 and magnetic modulating device 5 are set in shell 1.Wherein, magnetic chip 2 is for feeling
The magnetic field of anti-counterfeiting mark is answered, wiring board 3 is used to support and is electrically connected the input/output terminal of magnetic chip 2, and permanent magnet 4 is used for premagnetization
Weak magnetic anti-counterfeiting mark, magnetic modulating device 5 are used to adjust the Distribution of Magnetic Field of permanent magnet 4, input and output of the capillary 6 as Magnetic Sensor
End passes through the electrical connection corresponding with the input/output terminal of magnetic chip 2 of wiring board 3.
Magnetic modulating device 5 includes the first modulation arm 51, the second modulation arm 52, third modulation arm 53 and the 4th modulation arm 54,
The opposite sides of first modulation arm 51 and the second modulation arm 52 form first receiving space S1, the second modulation arm 52 and third modulation arm
53 opposite sides form the second accommodation space S2, and the opposite sides formation third receiving of third modulation arm 53 and the 4th modulation arm 54 is empty
Between S3, magnetic chip 2 be set to the second accommodation space S2, permanent magnet 4 be set to first receiving space S1 and/or third accommodation space S3,
Permanent magnet 4 can be set in first receiving space S1 or third accommodation space S3, or in first receiving space S1 and third
A permanent magnet 4 is respectively set in accommodation space S3.First modulation arm 51, the second modulation arm 52, third modulation arm 53 and the 4th modulation
Arm 54 is made of permeability magnetic material, or is made of non-magnet material, and shows to coat magnetic conductive material layer at it, and the purpose is to make the
One modulation arm 51, the second modulation arm 52, third modulation arm 53 and the 4th modulation arm 54 being capable of magnetic conductions.The magnetic field of permanent magnet 4 is by
One modulation arm 51, the second modulation arm 52, third modulation arm 53 and the constraint of the 4th modulation arm 54, on the one hand, permanent magnet 4 is perpendicular to magnetic
Magnetic-field component on the sensitive surface direction of chip, which is not weakened, to be sent out, and premagnetization weak magnetic anti-counterfeiting mark is used for；On the other hand,
The horizontal component in magnetic field is inhibited by adjacent modulation arm, to avoid or reduce magnetic field of permanent magnet to the shadow of magnetic chip sensitivity
It rings.It should be pointed out that the first modulation arm 51, the second modulation arm 52, third modulation arm 53 and the 4th modulation arm 54 can reduce
The horizontal component in magnetic field in accommodation space, and the water right above accommodation space and close to modulation arm regional magnetic field can be weakened
The amount of dividing equally.Therefore, during assembling Magnetic Sensor, even if the sensitive surface of magnetic chip 2 is slightly above the first modulation arm 51, second tune
Arm 52, third modulation arm 53 and the 4th modulation arm 54 processed, will not influence too much the sensitivity of Magnetic Sensor, so as to
To reduce the assembly difficulty of Magnetic Sensor, the assembly efficiency of Magnetic Sensor is improved.
Preferably, the top of the first modulation arm 51, the second modulation arm 52, third modulation arm 53 and the 4th modulation arm 54 is neat
Flat, the top of permanent magnet 4 is not higher than the first modulation arm 51, the second modulation arm 52, third modulation arm 53 and the 4th modulation arm 54
Top.
First modulation arm 51, the second modulation arm 52, third modulation arm 53 and the 4th modulation arm 54 can be independent for four
Component, as separate structure.But the present invention is not limited thereto, the first modulation arm 51, the second modulation arm 52, third modulation arm 53
With the 4th modulation arm 54 can also be connected to form one with connector structure or by a portion modulation arm formed integral structure.
Referring to figs. 1 and 2, magnetic modulating device 5 further includes connector 58, and connector 58 is made of permeability magnetic material,
Or made of non-magnet material, and show to coat magnetic conductive material layer at it, the purpose is to enable 58 magnetic conduction of connector.Connector
58 are connected as one the first modulation arm 51, the second modulation arm 52, third modulation arm 53 and the 4th modulation arm 54, and the first modulation
Arm 51, the second modulation arm 52, third modulation arm 53 and the 4th modulation arm 54 are located at the ipsilateral of connector 58.By the first modulation arm
51, the second modulation arm 52, third modulation arm 53 and the 4th modulation arm 54 are connected as one, and not only contribute to process, and advantageous
In assembly, the cost of Magnetic Sensor is reduced.Connector 58 is conducive to inhibit the horizontal component in 4 magnetic field of permanent magnet, to reduce forever
Influence of the magnet 4 to 2 sensitivity of magnetic chip.
It should be noted that permanent magnet 4 can be integral structure, it is also possible to be spliced by the shorter magnet of length,
Or it is stacked and is formed with the permanent magnetism piece of multiple laminated structures.Forever with multiple shorter magnet splicings or with multiple laminated structures
The stacked permanent magnet 4 obtained of magnetic sheet, the magnetic field strength of permanent magnet 4 more uniform property in its longitudinal direction.
In another embodiment, as shown in Figure 3a, magnetic modulating device 5 includes the first connector 58a and the second connector
First modulation arm 51 and the second modulation arm 52 are connected as one by 58b, the first connector 58a, form U-typed structure；Second connects
Third modulation arm 53 and the 4th modulation arm 54 are connected as one by junctor 58b, form U-typed structure.In other words, magnetic modulating device
5 may include one or more connectors, to by the first modulation arm 51, the second modulation arm 52, third modulation arm 53 and the 4th
It is partly or entirely connected as one in modulation arm 54.
Preferably, a protrusion 511,521, protrusion are respectively provided in the opposite sides of the second modulation arm 52 and third modulation arm 53
511,521 horizontal component of the magnetic field in first receiving space S1 that can further decrease permanent magnet 4, to further decrease forever
Influence of the magnet 4 to magnetic chip 2.In use, the height of the sensitive surface of magnetic chip 2 is opposite with the height of protrusion 511,521.?
The opposite sides of one modulation arm 51 and the second modulation arm 52 and opposite sides in third modulation arm 53 and the 4th modulation arm 54
Protrusion is arranged, which equally can reduce the horizontal component in 4 magnetic field of permanent magnet, reduce permanent magnet 4 to the shadow of magnetic chip 2
It rings, to improve the sensitivity of Magnetic Sensor.
In the present embodiment, perpendicular to paper direction, magnetic modulating device is structure as a whole, or by the thin of multiple sheets
Piece is stacked to be formed.Magnetic modulating device 5 by multiple sheets thin slice it is stacked form, the magnetic field of permanent magnet 4 can be made more evenly, favorably
In the consistency for improving Magnetic Sensor.
In another embodiment, as shown in Figure 3b, the first modulation arm 51 and the 4th modulation arm 54 are respectively to connector 58
The other side extends to form the first modulation auxiliary 51 ' and the 4th modulation auxiliary 54 ', the first modulation auxiliary 51 ' and the 4th modulation auxiliary
54 ' can further decrease horizontal component of the magnetic field in first receiving space S1 of permanent magnet 4.
In another embodiment, as shown in Figure 3c, the first modulation arm 51 and 52 connected body 58a of the second modulation arm are connected to
Together, third modulation arm 53 and 54 connected body 58b of the 4th modulation arm link together, the first modulation arm 51 and the 4th modulation arm
54 extend to form the first modulation auxiliary 51 ' and the 4th modulation auxiliary 54 ' to the other side of connector 58a and connector 58b respectively,
Connector 58a and connector 58b is stretched out to the second accommodation space S2.
As shown in figure 4, magnetic modulating device includes the first modulation arm 51, the second modulation arm 52, the tune of third modulation arm the 53, the 4th
First modulation arm 51 and the second modulation arm 52 are connected as one by arm 54, connector 58a and connector 58b processed, connector 58a,
Third modulation arm 53 and the 4th modulation arm 54 are integrated by connector 58b.In first receiving space S1 and third accommodation space S3
Permanent magnet 4 is respectively set.Wiring board 3 is equipped with boss 31, and the first modulation arm 51 and the second modulation arm 52 are set to a left side for boss 31
Side, third modulation arm 53 and the 4th modulation arm 54 are set to the right side of boss 31, and magnetic chip 2 is set on the boss 31, thus by magnetic
Chip 2 is set to the second modulation arm 52 and third modulation arm 53 is formed by the second accommodation space S2.
In the present embodiment, the first modulation arm 51, the second modulation arm 52, third modulation arm 53, the 4th modulation arm 54 and company
Junctor 58 is made by permeability magnetic material, or makes the first modulation arm 51, the second modulation arm 52, third modulation arm with permeability magnetic material
53, the 4th modulation arm 54, non-magnet material make connector 58.In practical applications, it is preferred to use permeability magnetic material production first
Modulation arm 51, the second modulation arm 52, third modulation arm 53, the 4th modulation arm 54 and connector 58.Permeability magnetic material is permalloy
Or ferrite or silicon steel sheet, and preferably use permalloy.
As shown in Figure 1, assist side 3 is equipped with through-hole, the first modulation arm 51 of magnetic modulating device 5, the second modulation arm 52,
Third modulation arm 53 and the 4th modulation arm 54 pass through the top that through-hole stretches out wiring board 3 upwards from the lower section of wiring board 3.Magnetic chip
2 are fixed on wiring board 3, and are located at the second accommodation space S2 that the second modulation arm 52 and third modulation arm 53 are formed, magnetic chip 2
Detection faces (as shown in the figure upper surface) of the sensitive surface towards shell 1.Distinguish in first receiving space S1 and third accommodation space S3
Permanent magnet 4 is set, and the top surface of permanent magnet 4 is flushed with the top surface of magnetic modulating device 5.
The top surface of magnetic modulating device 5 is not higher than the detection faces of shell 1, the top surface of the present embodiment magnetic modulating device 5 and shell 1
Detection faces flush.The detection faces of shell 1 be equipped with window 11, shell 1 can using permalloy, metal and metal oxide,
Plastics or resin production.
Magnetic chip 2 includes inductive magnetic thin film and chip bonding pad, input/output terminal and magnetic induction of the chip bonding pad as chip
The corresponding electrical connection of film.Magnetic susceptibility film is Hall effect film, anisotropic magnetoresistance film, giant magnet resistance film, tunnel magnetoelectricity
Hinder film, giant magnetoresistance films or giant Hall effect film.
Fig. 5 a is the schematic diagram of another embodiment of the present invention Magnetic Sensor part-structure, and Fig. 5 b is another embodiment of the present invention
The top view of Magnetic Sensor part-structure, Fig. 5 c are the exploded view of another embodiment of the present invention Magnetic Sensor part-structure.Such as figure
Shown in 5a, Fig. 5 b and Fig. 5 c, magnetic modulating device includes six modulation arms, i.e. the first modulation arm 51, the second modulation arm 52, third tune
Arm 53, the 4th modulation arm 54, the 5th modulation arm 55 and the 6th modulation arm 56 processed, the first modulation arm 51, the second modulation arm 52, they
The opposite sides of relative spacing setting, the first modulation arm 51 and the second modulation arm 52 form first receiving space S1, the second modulation arm
52 and third modulation arm 53 opposite sides formed the second accommodation space S2, the opposite sides of third modulation arm 53 and the 4th modulation arm 54
Forming third accommodation space S3, the opposite sides of the 4th modulation arm 54 and the 5th modulation arm 55 form the 4th accommodation space S4, and the 5th
The opposite sides of modulation arm 55 and the 6th modulation arm 56 form the 5th accommodation space S5, first receiving space S1, third accommodation space
Permanent magnet 4 is arranged in S3 and the 5th accommodation space S5, and magnetic chip 2 is arranged in the second accommodation space S2 and the 4th accommodation space S4.
In the present embodiment, the length of magnetic chip 2 is such as used for the Magnetic Sensor of ATM, must set much smaller than the width of detection
It is set to multichannel seamless detection, therefore, multiple magnetic chips 2 are respectively set in the second accommodation space S2 and the 4th accommodation space S4,
Moreover, the magnetic chip 2 set on the second accommodation space S2 is staggered with the magnetic chip 2 set on the 4th accommodation space S4, and make magnetic
The width of detection faces is completely covered in the induction region of chip 2, check frequency occurs to avoid Magnetic Sensor.
In the above-described embodiments, magnetic modulating device is respectively equipped with four modulation arms and six modulation arms.In fact, magnetic is modulated
Device can be the integer more than or equal to 2 with the modulation arm of 2n magnetic conduction, n, and 2n modulation arm is successively spaced and is oppositely arranged,
An accommodation space is formed between the adjacent modulation arm of any two, 2n modulation arm forms 2n-1 accommodation space.In use, from
Outermost accommodation space starts counting, and is counted as the accommodation space setting permanent magnet 4 of odd numbers, and the accommodation space for being counted as even numbers is set
Set magnetic chip 2；Modulation arm is to eliminate or reduce level point of the magnetic field of permanent magnet in the accommodation space where magnetic chip 2
Amount.It should be noted that the set-up mode of this permanent magnet 4 and magnetic chip 2 is for Magnetic Sensor.In practical applications,
One in the adjacent accommodation space of any two can be used to be arranged permanent magnet 4 according to service condition, another is for setting
The induction component such as magnetic chip is set, receiving of the magnetic field in not set permanent magnet of permanent magnet 4 can be eliminated or be reduced to modulation arm
Horizontal component in space.
When 2n modulation arm is arranged in magnetic modulating device, 2n modulation arm is connected as one using a connector, but
2n modulation arm is located at the ipsilateral of the connector.Alternatively, 2n modulation arm is divided into quantity m group, the quantity of every group of modulation arm
Can be equal, it can not also wait, then accordingly be connected m group modulation arm using m connector, the integer of m >=2.
In addition, two of them can also be extended with last modulation arm to the other side of connector in magnetic modulating device
Form modulation auxiliary, the modulation auxiliary can further confining magnetic field, be further reduced the magnetic field of permanent magnet corresponding to the magnetic chip 2
Accommodation space in horizontal component.
Preferably, a protrusion is respectively set in the opposite sides of two modulation arms for forming accommodation space, or wherein it
Protrusion is set on one, which can be further reduced water of the magnetic field of permanent magnet in the accommodation space corresponding to magnetic chip 2
The amount of dividing equally.
Preferably, the top of 2n modulation arm flushes, this not only contributes to processing magnetic modulating device, and is conducive to assemble
Magnetic modulating device, to reduce production cost.In use, it is preferred that the top of permanent magnet 4 be not higher than modulation arm top, this be because
It is higher than the top of modulation arm for the top of permanent magnet 4 and is unfavorable for modulation arm the magnetic field of permanent magnet 4 is constrained, permanent magnet 4
The horizontal component in magnetic field is larger.
It should be noted that in the above-described embodiments, permanent magnet 4 is set to first receiving space S1 and/or third accommodates sky
Between S3, the i.e. top that is set to magnetic modulating device of permanent magnet 4, permanent magnet 4 is closer apart from object to be detected.Relative to by permanent magnet 4
For below magnetic modulating device, it is more advantageous to premagnetization weak magnetic anti-counterfeiting mark.Moreover, permanent magnet 4 is located at the two of magnetic chip
Side, in use, then weak magnetic anti-counterfeiting mark is incuded first by 4 premagnetization of permanent magnet by magnetic chip 2.In addition, above-described embodiment magnetic
Sensor shows that multi-channel magnetic sensor, magnetic modulating device are accordingly applied to multi-channel magnetic sensor.But this not table
Show that the magnetic modulating device of the structure is simply possible to use in multi-channel magnetic sensor, which is equally applicable to single channel magnetic sensing
Device.
It should also be noted that, the magnetic modulating device that above-described embodiment refers to is applicable not only to money-checking plane magnetic sensor, and
And the Magnetic Sensor for being suitable for that bill etc. is examined to be equipped with anti-counterfeiting mark.
Magnetic Sensor provided by the above embodiment adjusts the Distribution of Magnetic Field of permanent magnet by magnetic modulating device, i.e., by permanent magnet
Magnetic field constrain in conduction in modulation arm as much as possible, to make permanent magnet perpendicular to the magnetic field on the sensitive surface direction of magnetic chip
Component is sent out, and to carry out premagnetization effect, while the horizontal component in magnetic field is inhibited by modulation arm, to avoid or reduce forever
Influence of the magnet to magnetic chip sensitivity, and then improve the sensitivity of Magnetic Sensor；Modulation arm can be used as protecting wall simultaneously, keep away
Exempt from or reduce interference of the external environment magnetic field to magnetic chip, that is, inhibits the effect of noise, to improve the anti-interference of Magnetic Sensor
Ability；In addition, modulation arm can also be used to protecting magnetic chip and being conducive to control magnetic chip magnetic induction face and detected medium it
Between distance, to improve the consistency of Magnetic Sensor.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (17)
1. a kind of Magnetic Sensor, comprising:
Magnetic chip, for incuding the magnetic field of anti-counterfeiting mark；
Wiring board is used to support and is electrically connected the input/output terminal of the magnetic chip；
Capillary, it is corresponding with the input/output terminal of the magnetic chip by the wiring board as the input/output terminal of Magnetic Sensor
Electrical connection；
Permanent magnet is used for premagnetization weak magnetic anti-counterfeiting mark；
It is characterized in that, further including magnetic modulating device, for adjusting the Distribution of Magnetic Field of the permanent magnet；
The magnetic modulating device includes the modulation arm and connector of 2n magnetic conduction, and n is the integer more than or equal to 2；The 2n
Modulation arm is successively spaced and is oppositely arranged, so as to form an accommodation space, the 2n between the adjacent modulation arm of any two
A modulation arm forms the 2n-1 accommodation spaces；It is counted from accommodation space described in outermost, is counted as the receiving of odd numbers
Permanent magnet is arranged in space, and the magnetic chip is arranged in the accommodation space for being counted as even numbers；The modulation arm is to eliminate or subtract
Horizontal component of the magnetic field of the small permanent magnet in the accommodation space where the magnetic chip, it is on the outermost side described
Modulation arm extends to form each one modulation auxiliary of formation to the other side of the connector, and the modulation arm uses permeability magnetic material system
Make, or made of non-magnet material, and shows to coat magnetic conductive material layer at it.
2. Magnetic Sensor according to claim 1, which is characterized in that the 2n modulation arm is connected as by the connector
One, and the 2n modulation arm is located at the ipsilateral of the connector.
3. Magnetic Sensor according to claim 1, which is characterized in that the magnetic modulating device further includes m connector, institute
It states 2n modulation arm and is divided into the equal or unequal m group of quantity, the m group modulation arm is correspondingly connected with by the m connector, m >=2
Integer.
4. Magnetic Sensor according to claim 1, which is characterized in that the n is 2, i.e., the described magnetic modulating device includes the
One modulation arm, the second modulation arm, third modulation arm and the 4th modulation arm, the phase of first modulation arm and second modulation arm
First receiving space is formed to side, the opposite sides of second modulation arm and the third modulation arm form the second accommodation space,
The opposite sides of the third modulation arm and the 4th modulation arm form third accommodation space；The magnetic chip is set to described second
Accommodation space, the permanent magnet are set to the first receiving space and the third accommodation space.
5. Magnetic Sensor according to claim 4, which is characterized in that the magnetic modulating device further includes connector, described
First modulation arm, second modulation arm, the third modulation arm and the 4th modulation arm are connected as one by connector
Body, and first modulation arm, second modulation arm, the third modulation arm and the 4th modulation arm are located at the connection
Body it is ipsilateral.
6. Magnetic Sensor according to claim 4, which is characterized in that the magnetic modulating device further includes two connectors,
First modulation arm and second modulation arm are connected as one by described two connectors respectively, and by described
Three modulation arms and the 4th modulation arm are connected as one, and first modulation arm, second modulation arm, described
Three modulation arms and the 4th modulation arm are located at the ipsilateral of the connector.
7. Magnetic Sensor according to claim 5 or 6, which is characterized in that first modulation arm and the 4th modulation
Arm extends to form each one modulation auxiliary of formation to the other side of the connector.
8. Magnetic Sensor according to claim 1, which is characterized in that the n is 3, i.e., the described magnetic modulating device includes the
One modulation arm, the second modulation arm, third modulation arm, the 4th modulation arm, the 5th modulation arm and the 6th modulation arm, first modulation
The opposite sides of arm and second modulation arm form first receiving space, the phase of second modulation arm and the third modulation arm
To the second accommodation space of side formation, the opposite sides of the third modulation arm and the 4th modulation arm form third accommodation space,
The opposite sides of 4th modulation arm and the 5th modulation arm form the 4th accommodation space, the 5th modulation arm and described the
The opposite sides of six modulation arms form the 5th accommodation space,
The permanent magnet is set to the first receiving space, the third accommodation space and the 5th accommodation space；The magnetic
Chip is set to second accommodation space and the 4th accommodation space.
9. Magnetic Sensor according to claim 8, which is characterized in that the magnetic modulating device further includes connector, described
Connector is by first modulation arm, second modulation arm, the third modulation arm, the 4th modulation arm, the described 5th
Modulation arm and the 6th modulation arm are connected as one, and first modulation arm, second modulation arm, the third are modulated
Arm, the 4th modulation arm, the 5th modulation arm and the 6th modulation arm are located at the ipsilateral of the connector.
10. Magnetic Sensor according to claim 8, which is characterized in that the magnetic modulating device further includes two connectors,
First modulation arm, second modulation arm and the third modulation arm are connected as one by the connector respectively, and
4th modulation arm, the 5th modulation arm and the 6th modulation arm are connected as one, it is first modulation arm, described
Second modulation arm, the third modulation arm, the 4th modulation arm, the 5th modulation arm and the 6th modulation arm are located at institute
State the ipsilateral of connector.
11. Magnetic Sensor according to claim 9 or 10, which is characterized in that first modulation arm and the described 6th is adjusted
Arm processed extends each one modulation auxiliary of formation to the other side of the connector respectively.
12. Magnetic Sensor according to claim 1, which is characterized in that in the accommodation space that the permanent magnet is arranged
Protrusion is arranged in the opposite sides of the corresponding modulation arm, and/or, corresponding to the accommodation space that the magnetic chip is set
The modulation arm opposite sides be arranged protrusion.
13. Magnetic Sensor according to claim 1, which is characterized in that the magnetic modulating device is structure as a whole, or by more
The thin slice of a sheet is stacked to be formed.
14. Magnetic Sensor according to claim 1, which is characterized in that the permanent magnet is structure as a whole, or by multiple
Shape structure is stacked to be formed.
15. Magnetic Sensor according to claim 1, which is characterized in that the permeability magnetic material includes permalloy or iron oxygen
Body or silicon steel sheet.
16. Magnetic Sensor according to claim 1, which is characterized in that including shell, it is equipped with window on the housing,
The magnetic chip, the wiring board and the magnetic modulating device are set in the shell, the magnetic chip, the magnetic modulating device
Opposite with the window with the permanent magnet, one end of the capillary is stretched out from the shell；
The wiring board is equipped with the through-hole passed through for the modulation arm, and the modulation arm is by the through-hole under the wiring board
The top of the wiring board is stretched out on direction.
17. Magnetic Sensor according to claim 1, which is characterized in that the magnetic chip includes inductive magnetic thin film and chip
The chip basal body of pad and the support inductive magnetic thin film and chip bonding pad, the chip bonding pad are defeated as the input of the chip
Outlet electrical connection corresponding with the inductive magnetic thin film；
The inductive magnetic thin film is that Hall effect film, anisotropic magnetoresistance film, giant magnet resistance film, tunnel magneto resistance are thin
Film, giant magnetoresistance films or giant Hall effect film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310275144.3A CN104282072B (en) | 2013-07-03 | 2013-07-03 | Magnetic modulating device and Magnetic Sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310275144.3A CN104282072B (en) | 2013-07-03 | 2013-07-03 | Magnetic modulating device and Magnetic Sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104282072A CN104282072A (en) | 2015-01-14 |
| CN104282072B true CN104282072B (en) | 2019-02-15 |
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| CN201310275144.3A Expired - Fee Related CN104282072B (en) | 2013-07-03 | 2013-07-03 | Magnetic modulating device and Magnetic Sensor |
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| JP6789711B2 (en) * | 2016-07-29 | 2020-11-25 | キヤノン電子株式会社 | Magnetic identification device |
| JP7059080B2 (en) * | 2018-04-09 | 2022-04-25 | キヤノン電子株式会社 | Magnetic identification device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3206810B2 (en) * | 1999-09-02 | 2001-09-10 | マイクロマグネ有限会社 | Magnetic detector |
| CN2788259Y (en) * | 2005-04-15 | 2006-06-14 | 福建省电影机械厂 | Huge magnetic resistance sensor of paper money counter |
| CN101832749B (en) * | 2010-05-08 | 2012-02-08 | 锦州海伯伦汽车电子有限公司 | Anti-error displacement transducer for Hall-type single-path signal output |
| CN102722932A (en) * | 2012-06-19 | 2012-10-10 | 兰州大学 | Magnetic head of currency detector |
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