CN104282072A - Magnetic modulation device and magnetic sensor - Google Patents
Magnetic modulation device and magnetic sensor Download PDFInfo
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- CN104282072A CN104282072A CN201310275144.3A CN201310275144A CN104282072A CN 104282072 A CN104282072 A CN 104282072A CN 201310275144 A CN201310275144 A CN 201310275144A CN 104282072 A CN104282072 A CN 104282072A
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Abstract
The invention provides a magnetic modulation device which is used for modulating the magnetic field distribution of permanent magnets. The magnetic modulation device is characterized by comprising 2n magnetic conduction modulation arms, n is an integer larger than or equal to 2, the 2n modulation arms are sequentially and oppositely arranged at intervals so that a containing space can be formed between every two adjacent modulation arms, the 2n-1 containing spaces are formed by the 2n modulation arms, each permanent magnet is arranged in any one of every two adjacent containing spaces, and the modulation arms are used for eliminating or reducing the horizontal components, in the containing spaces provided with no permanent magnets, of the magnetic fields of the permanent magnets. By means of the magnetic modulation device, the horizontal components, in the first containing spaces, of the magnetic fields of the permanent magnets can be eliminated or reduced, and the environment noise can be restrained. The invention further provides a magnetic sensor.
Description
Technical field
The invention belongs to fine measuring instrument, be specifically related to a kind ofly can change the magnetic modulating device of Distribution of Magnetic Field and apply the Magnetic Sensor of this magnetic modulating device.
Background technology
Magnetic Sensor is widely used in cash inspecting machine, ATM and differentiates in the middle of instrument, for distinguishing in it true and false of the bank note, bill, trade mark etc. that are provided with anti-counterfeiting mark.In order to improve anti-counterfeit capability, in bank note, bill, trade mark etc., being not only provided with Hard Magnetic anti-counterfeiting mark, and being provided with soft magnetism anti-counterfeiting mark.Wherein, soft magnetism anti-counterfeiting mark is super very magnetic, itself do not possess magnetic or magnetic very weak, but instantaneous magnetic after being magnetized, can be obtained very soon, thus produce the magnetic field can responded to by Magnetic Sensor.The permanent magnet that the weak magnetic anti-counterfeiting mark of premagnetization is set is needed in Magnetic Sensor.But in use, inevitably there is horizontal component in the magnetic field being arranged on the permanent magnet generation near magnetic chip, this horizontal component seriously reduces the sensitivity of Magnetic Sensor.Meanwhile, other magnetic field in external environment also can produce horizontal component, the sensitivity of the reduction Magnetic Sensor that this horizontal component also can be serious.Therefore, must eliminate and reduce as far as possible the horizontal component in magnetic field, to prevent it on the impact of magnetic chip sensitivity.
Summary of the invention
The technical problem to be solved in the present invention is exactly the above-mentioned defect for existing in Magnetic Sensor, and provide a kind of magnetic modulating device, it can improve the Distribution of Magnetic Field of permanent magnet, reduces, even eliminates the horizontal component of magnetic field of permanent magnet.
The present invention also provides a kind of Magnetic Sensor, and it can reduce, even eliminate magnetic field of permanent magnet to the impact of magnetic chip, thus improves the sensitivity of Magnetic Sensor.
For this reason, the invention provides a kind of magnetic modulating device, for modulating the Distribution of Magnetic Field of permanent magnet, comprise the modulation arm of 2n magnetic conduction, n be more than or equal to 2 integer, a described 2n modulation arm is oppositely arranged at interval successively, and to make to form a spatial accommodation between any two adjacent described modulation arm, described 2n modulation arm forms 2n-1 described spatial accommodation; One of any two adjacent described spatial accommodations are provided with described permanent magnet; Described modulation arm is in order to eliminate or to reduce the horizontal component of magnetic field in the described spatial accommodation not arranging permanent magnet of described permanent magnet.
Wherein, also comprise a connector, a described 2n modulation arm connects as one by described connector, and a described 2n modulation arm is positioned at the homonymy of described connector.
Wherein, also comprise m connector, a described 2n modulation arm is divided into the equal or m group not etc. of quantity, and described m group modulation arm correspondence connects by a described m connector, the integer of m >=2.
Wherein, described modulation arm extends to form modulation auxiliary to the opposite side of described connector.
Wherein, the opposite sides forming described two modulation arm of described spatial accommodation arranges respectively or one of them arranges protuberance.
Wherein, the top of a described 2n modulation arm flushes, and the top of described permanent magnet is not higher than the top of described modulation arm.
Wherein, described magnetic modulating device is structure as a whole, or forms by multiple schistose texture is stacked.
Wherein, described permanent magnet is structure as a whole, or forms by multiple schistose texture is stacked.
Wherein, described magnetic conduction arm adopts permeability magnetic material to make, or makes of non-magnet material, and shows to apply magnetic conductive material layer at it.
Wherein, described permeability magnetic material comprises permalloy or ferrite or siliconized plate.
The present invention also provides a kind of Magnetic Sensor, comprising:
Magnetic chip, for responding to the magnetic field of anti-counterfeiting mark;
Wiring board, for supporting and be electrically connected the input/output terminal of described magnetic chip;
Capillary, as the input/output terminal of Magnetic Sensor, is electrically connected by described wiring board is corresponding with the input/output terminal of described magnetic chip;
Permanent magnet, for the weak magnetic anti-counterfeiting mark of premagnetization;
Also comprise magnetic modulating device, for regulating the Distribution of Magnetic Field of described permanent magnet;
Described magnetic modulating device comprises the modulation arm of 2n magnetic conduction, n be more than or equal to 2 integer; A described 2n modulation arm is oppositely arranged at interval successively, and to make to form a spatial accommodation between any two adjacent described modulation arm, described 2n modulation arm forms 2n-1 described spatial accommodation; From spatial accommodation counting described in outermost, the described spatial accommodation being counted as odd numbers arranges permanent magnet, and the described spatial accommodation being counted as even numbers arranges described magnetic chip; Described modulation arm is in order to eliminate or to reduce the horizontal component of magnetic field in the described spatial accommodation at described magnetic chip place of described permanent magnet.
Wherein, described magnetic modulating device also comprises a connector, and a described 2n modulation arm connects as one by described connector, and a described 2n modulation arm is positioned at the homonymy of described connector.
Wherein, described magnetic modulating device also comprises m connector, and a described 2n modulation arm is divided into the equal or m group not etc. of quantity, and described m group modulation arm correspondence connects by a described m connector, the integer of m >=2.
Wherein, described n is 2, namely described magnetic modulating device comprises the first modulation arm, the second modulation arm, the 3rd modulation arm and the 4th modulation arm, the opposite sides of described first modulation arm and described second modulation arm forms the first spatial accommodation, the opposite sides of described second modulation arm and described 3rd modulation arm forms the second spatial accommodation, and the opposite sides of described 3rd modulation arm and described 4th modulation arm forms the 3rd spatial accommodation; Described magnetic chip is located at described second spatial accommodation, and described permanent magnet is located at described first spatial accommodation and described 3rd spatial accommodation.
Wherein, described magnetic modulating device also comprises connector, described first modulation arm, described second modulation arm, described 3rd modulation arm and described 4th modulation arm connect as one by described connector, and described first modulation arm, described second modulation arm, described 3rd modulation arm and described 4th modulation arm are positioned at the homonymy of described connector.
Wherein, described magnetic modulating device also comprises two connectors, described first modulation arm and described second modulation arm are connected as one structure by described two connectors respectively, and described 3rd modulation arm and described 4th modulation arm are connected as one structure, and described first modulation arm, described second modulation arm, described 3rd modulation arm and described 4th modulation arm are positioned at the homonymy of described connector.
Wherein, described first modulation arm and described 4th modulation arm extend to form each formation one to the opposite side of described connector and modulate auxiliary.
Wherein, described n is 3, namely described magnetic modulating device comprises the first modulation arm, second modulation arm, 3rd modulation arm, 4th modulation arm, 5th modulation arm and the 6th modulation arm, the opposite sides of described first modulation arm and described second modulation arm forms the first spatial accommodation, the opposite sides of described second modulation arm and described 3rd modulation arm forms the second spatial accommodation, the opposite sides of described 3rd modulation arm and described 4th modulation arm forms the 3rd spatial accommodation, the opposite sides of described 4th modulation arm and described 5th modulation arm forms the 4th spatial accommodation, the opposite sides of described 5th modulation arm and described 6th modulation arm forms the 5th spatial accommodation,
Described permanent magnet is located at described first spatial accommodation, described 3rd spatial accommodation and described 5th spatial accommodation; Described magnetic chip is located at described second spatial accommodation and described 4th spatial accommodation.
Wherein, described magnetic modulating device also comprises connector, described first modulation arm, described second modulation arm, described 3rd modulation arm, described 4th modulation arm, described 5th modulation arm and described 6th modulation arm connect as one by described connector, and described first modulation arm, described second modulation arm, described 3rd modulation arm, described 4th modulation arm, described 5th modulation arm and described 6th modulation arm are positioned at the homonymy of described connector.
Wherein, described magnetic modulating device also comprises two connectors, described first modulation arm, described second modulation arm and described 3rd modulation arm connect as one by described connector respectively, and described 4th modulation arm, described 5th modulation arm and described 6th modulation arm are connected as one, described first modulation arm, described second modulation arm, described 3rd modulation arm, described 4th modulation arm, described 5th modulation arm and described 6th modulation arm are positioned at the homonymy of described connector.
Wherein, described first modulation arm and described 6th modulation arm extend each formation one respectively to the opposite side of described connector and modulate auxiliary.
Wherein, protuberance is set in the opposite sides arranging the described modulation arm corresponding to the described spatial accommodation of described permanent magnet, and/or, in the opposite sides arranging the described modulation arm corresponding to the described spatial accommodation of described magnetic chip, protuberance is set.
Wherein, described magnetic modulating device is structure as a whole, or forms by the thin slice of multiple sheet is stacked.
Wherein, described permanent magnet is structure as a whole, or forms by multiple schistose texture is stacked.
Wherein, described magnetic conduction arm adopts permeability magnetic material to make, or makes of non-magnet material, and shows to apply magnetic conductive material layer at it.
Wherein, described permeability magnetic material comprises permalloy or ferrite or siliconized plate.
Wherein, comprise shell, be provided with window on the housing, described magnetic chip, described wiring board and described magnetic modulating device are located in described shell, described magnetic chip, described magnetic modulating device are relative with described window with described permanent magnet, and one end of described capillary is stretched out in described shell;
Described wiring board is provided with the through hole passed for described modulation arm, and described modulation arm protrudes upward the top of described wiring board below described wiring board by described through hole.
Wherein, described magnetic chip comprises inductive magnetic thin film and chip bonding pad and supports the chip basal body of described inductive magnetic thin film and chip bonding pad, and described chip bonding pad is electrically connected as the input/output terminal of described chip is corresponding with described magnetic induction film;
Described 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 present invention has following beneficial effect:
Magnetic modulating device provided by the invention can regulate the Distribution of Magnetic Field around permanent magnet, magnetic field by permanent magnet constrains in modulation arm as much as possible conducts, permanent magnet is outwards sent perpendicular to the magnetic-field component on the sensitive surface direction of magnetic chip, the modulated arm of the horizontal component in its magnetic field is suppressed, thus eliminates or reduce permanent magnet to the impact of magnetic chip sensitivity; Meanwhile, modulation arm as fender wall, can also be avoided or reduce external environment magnetic field entering spatial accommodation, have the effect of restraint speckle.
Magnetic Sensor provided by the invention regulates the Distribution of Magnetic Field of permanent magnet by magnetic modulating device, magnetic field by permanent magnet constrains in modulation arm as much as possible conducts, thus permanent magnet is outwards sent perpendicular to the magnetic-field component on the sensitive surface direction of magnetic chip, to carry out premagnetization effect, the modulated arm of the horizontal component in magnetic field suppresses simultaneously, thus avoid or reduce the impact of permanent magnet on magnetic chip sensitivity, and then improve the sensitivity of Magnetic Sensor; Modulation arm as fender wall, can be avoided or reduce the interference of external environment magnetic field to magnetic chip, be i.e. the effect of restraint speckle simultaneously, thus improves the antijamming capability of Magnetic Sensor; In addition, modulation arm also can be used for protecting magnetic chip and being conducive to controlling the distance between magnetic chip magnetic induction face and detected medium, thus improves the consistance of Magnetic Sensor.
Accompanying drawing explanation
Fig. 1 a is the structural representation of embodiment of the present invention Magnetic Sensor;
Fig. 1 b is the exploded view of embodiment of the present invention Magnetic Sensor;
Fig. 2 is the distribution plan in embodiment of the present invention magnetic field when permanent magnet being located at the second spatial accommodation and the 3rd spatial accommodation of magnetic modulating device;
Fig. 3 a is the structural representation of another magnetic modulating device of the embodiment of the present invention;
Fig. 3 b is the structural representation of another magnetic modulating device of the embodiment of the present invention;
Fig. 3 c is the structural representation of the another magnetic modulating device of the embodiment of the present invention;
Fig. 4 is the structural representation of embodiment of the present invention Magnetic Sensor;
Fig. 5 a is the structural representation of another embodiment of the present invention Magnetic Sensor;
Fig. 5 b is the outside 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.
Embodiment
For making those skilled in the art understand technical scheme of the present invention better, below in conjunction with accompanying drawing, magnetic modulating device provided by the invention and Magnetic Sensor are described in detail.
As illustrated in figs. ia and ib, Magnetic Sensor comprises shell 1, magnetic chip 2, wiring board 3, permanent magnet 4, magnetic modulating device 5 and capillary 6, and magnetic chip 2, wiring board 3, permanent magnet 4 and magnetic modulating device 5 are located in shell 1.Wherein, magnetic chip 2 is for responding to the magnetic field of anti-counterfeiting mark, wiring board 3 is for supporting and be electrically connected the input/output terminal of magnetic chip 2, permanent magnet 4 is for the weak magnetic anti-counterfeiting mark of premagnetization, magnetic modulating device 5 is for regulating the Distribution of Magnetic Field of permanent magnet 4, capillary 6, as the input/output terminal of Magnetic Sensor, is electrically connected by wiring board 3 is corresponding with the input/output terminal of magnetic chip 2.
Magnetic modulating device 5 comprises the first modulation arm 51, second modulation arm 52, 3rd modulation arm 53 and the 4th modulation arm 54, the opposite sides of the first modulation arm 51 and the second modulation arm 52 forms the first spatial accommodation S1, the opposite sides of the second modulation arm 52 and the 3rd modulation arm 53 forms the second spatial accommodation S2, the opposite sides of the 3rd modulation arm 53 and the 4th modulation arm 54 forms the 3rd spatial accommodation S3, magnetic chip 2 is located at the second spatial accommodation S2, permanent magnet 4 is located at the first spatial accommodation S1 and/or the 3rd spatial accommodation S3, namely permanent magnet 4 can be set at the first spatial accommodation S1 or the 3rd spatial accommodation S3, or at the first spatial accommodation S1 and the 3rd spatial accommodation S3, one permanent magnet 4 is set respectively.First modulation arm 51, second modulation arm 52, the 3rd modulation arm 53 and the 4th modulation arm 54 adopt permeability magnetic material to make, or make of non-magnet material, and show to apply magnetic conductive material layer at it, its objective is and make the first modulation arm 51, second modulation arm 52, the 3rd modulation arm 53 and the 4th modulation arm 54 can magnetic conduction.The magnetic field of permanent magnet 4 is retrained by the first modulation arm 51, second modulation arm 52, the 3rd modulation arm 53 and the 4th modulation arm 54, on the one hand, permanent magnet 4 is not weakened perpendicular to the magnetic-field component on the sensitive surface direction of magnetic chip and outwards sends, for the weak magnetic anti-counterfeiting mark of premagnetization; On the other hand, the horizontal component in magnetic field is suppressed by adjacent modulation arm, thus avoids or reduce the impact of magnetic field of permanent magnet on magnetic chip sensitivity.It is to be noted, first modulation arm 51, second modulation arm 52, the 3rd modulation arm 53 and the 4th modulation arm 54 can reduce the horizontal component of spatial accommodation internal magnetic field, and can to weaken directly over spatial accommodation and near the horizontal component of modulation arm regional magnetic field.Therefore, in assembling Magnetic Sensor process, even if the sensitive surface of magnetic chip 2 is a little more than the first modulation arm 51, second modulation arm 52, the 3rd modulation arm 53 and the 4th modulation arm 54, also too large impact can not be caused on the sensitivity of Magnetic Sensor, thus the assembly difficulty of Magnetic Sensor can be reduced, improve the efficiency of assembling of Magnetic Sensor.
Preferably, the top of the first modulation arm 51, second modulation arm 52, the 3rd modulation arm 53 and the 4th modulation arm 54 flushes, and the top of permanent magnet 4 is not higher than the top of the first modulation arm 51, second modulation arm 52, the 3rd modulation arm 53 and the 4th modulation arm 54.
First modulation arm 51, second modulation arm 52, the 3rd modulation arm 53 and the 4th modulation arm 54 can be four independently parts, are Split type structure.But the present invention is not limited thereto, the first modulation arm 51, second modulation arm 52, the 3rd modulation arm 53 and the 4th modulation arm 54 also can be connected to form one structure or wherein a part of modulation arm will form integrative-structure with connector.
Shown in composition graphs 1 and Fig. 2, magnetic modulating device 5 also comprises connector 58, and connector 58 adopts permeability magnetic material to make, or makes of non-magnet material, and shows to apply magnetic conductive material layer at it, its objective is and makes connector 58 can magnetic conduction.First modulation arm 51, second modulation arm 52, the 3rd modulation arm 53 and the 4th modulation arm 54 connect as one by connector 58, and the first modulation arm 51, second modulation arm 52, the 3rd modulation arm 53 and the 4th modulation arm 54 are positioned at the homonymy of connector 58.First modulation arm 51, second modulation arm 52, the 3rd modulation arm 53 and the 4th modulation arm 54 are connected as one, is not only conducive to processing, and be conducive to assembling, reduce the cost of Magnetic Sensor.Connector 58 is conducive to the horizontal component suppressing permanent magnet 4 magnetic field, thus reduces permanent magnet 4 to the impact of magnetic chip 2 sensitivity.
It should be noted that, permanent magnet 4 can be integrative-structure, also can be spliced by the magnet that length is shorter, or forms with the permanent magnetism sheet of multiple schistose texture is stacked.With the permanent magnet 4 of the splicing of multiple shorter magnet or the stacked acquisition of permanent magnetism sheet by multiple schistose texture, the magnetic field intensity of permanent magnet 4 homogeneity more in their length direction.
In another embodiment, as shown in Figure 3 a, magnetic modulating device 5 comprises the first connector 58a and the second connector 58b, and the first modulation arm 51 and the second modulation arm 52 connect as one by the first connector 58a, forms " U " type structure; 3rd modulation arm 53 and the 4th modulation arm 54 connect as one by the second connector 58b, form " U " type structure.In other words, magnetic modulating device 5 can comprise one or more connector, in order to partly or entirely to connect as one in the first modulation arm 51, second modulation arm 52, the 3rd modulation arm 53 and the 4th modulation arm 54.
Preferably, a protuberance 511,521 is respectively provided with in the opposite sides of the second modulation arm 52 and the 3rd modulation arm 53, protuberance 511,521 can reduce the horizontal component of magnetic field at the first spatial accommodation S1 of permanent magnet 4 further, thus reduces permanent magnet 4 further to the impact of magnetic chip 2.During use, the height of the sensitive surface of magnetic chip 2 is relative with the height of protuberance 511,521.The first modulation arm 51 and the second modulation arm 52 opposite sides and all can protuberance be set in the opposite sides of the 3rd modulation arm 53 and the 4th modulation arm 54, this protuberance can reduce the horizontal component in permanent magnet 4 magnetic field equally, reduce permanent magnet 4 to the impact of magnetic chip 2, thus improve the sensitivity of Magnetic Sensor.
In the present embodiment, perpendicular to paper direction, magnetic modulating device is structure as a whole, or forms by the thin slice of multiple sheet is stacked.Magnetic modulating device 5 forms by the thin slice of multiple sheet is stacked, the magnetic field of permanent magnet 4 can be made evenly, be conducive to improving the consistance of Magnetic Sensor.
In another embodiment, as shown in Figure 3 b, first modulation arm 51 and the 4th modulation arm 54 extend to form the first modulation auxiliary 51 ' and the 4th modulation auxiliary 54 ', the first respectively to the opposite side of connector 58 and modulate auxiliary 51 ' and the 4th and modulate the horizontal component of magnetic field at the first spatial accommodation S1 that auxiliary 54 ' can reduce permanent magnet 4 further.
In another embodiment, as shown in Figure 3 c, first modulation arm 51 and the second modulation arm 52 connected body 58a link together, 3rd modulation arm 53 and the 4th modulation arm 54 connected body 58b link together, first modulation arm 51 and the 4th modulation arm 54 extend to form the first modulation auxiliary 51 ' and the 4th modulation auxiliary 54 ' respectively to the opposite side of connector 58a and connector 58b, and connector 58a and connector 58b all stretches out to the second spatial accommodation S2.
As shown in Figure 4, magnetic modulating device comprises the first modulation arm 51, second modulation arm 52, the 3rd modulation arm 53, the 4th modulation arm 54, connector 58a and connector 58b, first modulation arm 51 and the second modulation arm 52 connect as one by connector 58a, and the 3rd modulation arm 53 and the 4th modulation arm 54 are integrated by connector 58b.At the first spatial accommodation S1 and the 3rd spatial accommodation S3, permanent magnet 4 is set respectively.Wiring board 3 is provided with boss 31, first modulation arm 51 and the second modulation arm 52 are located at the left side of boss 31,3rd modulation arm 53 and the 4th modulation arm 54 are located at the right side of boss 31, magnetic chip 2 is located on this boss 31, thus is located at by magnetic chip 2 in the second spatial accommodation S2 that second modulation arm 52 and the 3rd modulation arm 53 formed.
In the present embodiment, first modulation arm 51, second modulation arm 52, the 3rd modulation arm 53, the 4th modulation arm 54 and connector 58 make by permeability magnetic material, or make the first modulation arm 51, second modulation arm 52, the 3rd modulation arm 53, the 4th modulation arm 54 with permeability magnetic material, non-magnet material makes connector 58.In actual applications, permeability magnetic material is preferably adopted to make the first modulation arm 51, second modulation arm 52, the 3rd modulation arm 53, the 4th modulation arm 54 and connector 58.Permeability magnetic material is permalloy or ferrite or siliconized plate, and preferably adopts permalloy.
As shown in Figure 1, wiring board 3 is provided with through hole, the first modulation arm 51, second modulation arm 52 of magnetic modulating device 5, the 3rd modulation arm 53 and the 4th modulation arm 54 protrude upward the top of wiring board 3 through through hole from the below of wiring board 3.Magnetic chip 2 is fixed on wiring board 3, and is positioned at the second spatial accommodation S2 that the second modulation arm 52 and the 3rd modulation arm 53 formed, and the sensitive surface of magnetic chip 2 is towards the detection faces (shown in figure upper surface) of shell 1.Arrange permanent magnet 4 respectively at the first spatial accommodation S1 and the 3rd spatial accommodation S3, the end face of permanent magnet 4 flushes with the end face of magnetic modulating device 5.
The end face of magnetic modulating device 5 is not higher than the detection faces of shell 1, and the end face of the present embodiment magnetic modulating device 5 flushes with the detection faces of shell 1.The detection faces of shell 1 is provided with window 11, and shell 1 can adopt permalloy, metal and metal oxide, plastics or resin to make.
Magnetic chip 2 comprises inductive magnetic thin film and chip bonding pad, and chip bonding pad is electrically connected as the input/output terminal of chip is corresponding with magnetic induction film.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.
Fig. 5 a is the schematic diagram of another embodiment of the present invention Magnetic Sensor part-structure, and Fig. 5 b is the vertical view of another embodiment of the present invention Magnetic Sensor part-structure, and Fig. 5 c is the exploded view of another embodiment of the present invention Magnetic Sensor part-structure.As Fig. 5 a, shown in Fig. 5 b and Fig. 5 c, magnetic modulating device comprises six modulation arm, i.e. the first modulation arm 51, second modulation arm 52, 3rd modulation arm 53, 4th modulation arm 54, 5th modulation arm 55 and the 6th modulation arm 56, first modulation arm 51, second modulation arm 52, their relative spacings are arranged, the opposite sides of the first modulation arm 51 and the second modulation arm 52 forms the first spatial accommodation S1, the opposite sides of the second modulation arm 52 and the 3rd modulation arm 53 forms the second spatial accommodation S2, the opposite sides of the 3rd modulation arm 53 and the 4th modulation arm 54 forms the 3rd spatial accommodation S3, the opposite sides of the 4th modulation arm 54 and the 5th modulation arm 55 forms the 4th spatial accommodation S4, the opposite sides of the 5th modulation arm 55 and the 6th modulation arm 56 forms the 5th spatial accommodation S5, first spatial accommodation S1, 3rd spatial accommodation S3 and the 5th spatial accommodation S5 arranges permanent magnet 4, second spatial accommodation S2 and the 4th spatial accommodation S4 arranges magnetic chip 2.
In the present embodiment, the length of magnetic chip 2 is much smaller than the width detected, as the Magnetic Sensor for ATM, it must be set to the seamless detection of hyperchannel, therefore, arranges multiple magnetic chip 2 respectively at the second spatial accommodation S2 and the 4th spatial accommodation S4, and, the magnetic chip 2 being located at the second spatial accommodation S2 is crisscross arranged with the magnetic chip 2 being located at the 4th spatial accommodation S4, and makes the induction region of magnetic chip 2 cover the width of detection faces completely, occurs check frequency to avoid Magnetic Sensor.
In the above-described embodiments, magnetic modulating device is respectively equipped with four modulation arm and six modulation arm.In fact, magnetic modulating device can the modulation arm of 2n magnetic conduction, n be more than or equal to 2 integer, 2n modulation arm be oppositely arranged at interval successively, between any two adjacent modulation arm, form a spatial accommodation, 2n modulation arm forms 2n-1 spatial accommodation.During use, count from outermost spatial accommodation, the spatial accommodation being counted as odd numbers arranges permanent magnet 4, and the spatial accommodation being counted as even numbers arranges magnetic chip 2; Modulation arm is in order to eliminate or to reduce the horizontal component of magnetic field in the spatial accommodation at magnetic chip 2 place of permanent magnet.It should be noted that, the set-up mode of this permanent magnet 4 and magnetic chip 2 is for Magnetic Sensor.In actual applications, can according to service condition, in any two adjacent spatial accommodations one is used for arranging permanent magnet 4, another is for arranging the inductive means such as such as magnetic chip, and the horizontal component of magnetic field in the spatial accommodation not arranging permanent magnet of permanent magnet 4 can be eliminated or reduce to modulation arm.
When magnetic modulating device arranges 2n modulation arm, utilize a connector 2n modulation arm to be connected as one, but 2n modulation arm is positioned at the homonymy of this connector.Or 2n modulation arm is divided into quantity m group, and the quantity of the modulation arm often organized can be equal, also can not wait, m connector is then utilized m group modulation arm to be connected accordingly, the integer of m >=2.
In addition, in magnetic modulating device, a wherein two or more modulation arm can also be extended to form modulation auxiliary to the opposite side of connector, this modulation auxiliary can confining magnetic field further, reduces the horizontal component of magnetic field in the spatial accommodation corresponding to magnetic chip 2 of permanent magnet further.
Preferably, one protuberance is set respectively in the opposite sides of two modulation arm forming spatial accommodation, or one of wherein on protuberance is set, this protuberance can reduce the horizontal component of magnetic field in the spatial accommodation corresponding to magnetic chip 2 of permanent magnet further.
Preferably, the top of 2n modulation arm flushes, and this is not only conducive to processing magnetic modulating device, and is conducive to assembling magnetic modulating device, thus reduces production cost.During use, the top of preferred permanent magnet 4 is not higher than the top of modulation arm, this is because higher than the top of modulation arm, the top of permanent magnet 4 is unfavorable for that the magnetic field of modulation arm to permanent magnet 4 retrains, the horizontal component in the magnetic field of permanent magnet 4 is larger.
It should be noted that, in the above-described embodiments, permanent magnet 4 is located at the first spatial accommodation S1 and/or the 3rd spatial accommodation S3, and namely permanent magnet 4 is located at the top of magnetic modulating device, and permanent magnet 4 is nearer apart from object to be detected.For being located at below magnetic modulating device by permanent magnet 4, be more conducive to the weak magnetic anti-counterfeiting mark of premagnetization.And permanent magnet 4 is positioned at the both sides of magnetic chip, during use, first weak magnetic anti-counterfeiting mark by permanent magnet 4 premagnetization, is then responded to by magnetic chip 2.In addition, shown in above-described embodiment Magnetic Sensor is multi-channel magnetic sensor, and magnetic modulating device is applied to multi-channel magnetic sensor accordingly.But this does not represent that the magnetic modulating device of this structure only can be used for multi-channel magnetic sensor, and this magnetic modulating device is equally applicable to single channel Magnetic Sensor.
Also it should be noted that, the magnetic modulating device that above-described embodiment is mentioned is not only applicable to cash inspecting machine Magnetic Sensor, and is applicable to check bill etc. to be provided with the Magnetic Sensor of anti-counterfeiting mark.
The Magnetic Sensor that above-described embodiment provides regulates the Distribution of Magnetic Field of permanent magnet by magnetic modulating device, magnetic field by permanent magnet constrains in modulation arm as much as possible conducts, thus permanent magnet is outwards sent perpendicular to the magnetic-field component on the sensitive surface direction of magnetic chip, to carry out premagnetization effect, the modulated arm of the horizontal component in magnetic field suppresses simultaneously, thus avoid or reduce the impact of permanent magnet on magnetic chip sensitivity, and then improve the sensitivity of Magnetic Sensor; Modulation arm as fender wall, can be avoided or reduce the interference of external environment magnetic field to magnetic chip, be i.e. the effect of restraint speckle simultaneously, thus improves the antijamming capability of Magnetic Sensor; In addition, modulation arm also can be used for protecting magnetic chip and being conducive to controlling the distance between magnetic chip magnetic induction face and detected medium, thus improves the consistance of Magnetic Sensor.
Be understandable that, the illustrative embodiments that above embodiment is only used to principle of the present invention is described and adopts, but the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (28)
1. a magnetic modulating device, for modulating the Distribution of Magnetic Field of permanent magnet, it is characterized in that, comprise the modulation arm of 2n magnetic conduction, n be more than or equal to 2 integer, a described 2n modulation arm is oppositely arranged at interval successively, and to make to form a spatial accommodation between any two adjacent described modulation arm, described 2n modulation arm forms 2n-1 described spatial accommodation; One of any two adjacent described spatial accommodations are provided with described permanent magnet; Described modulation arm is in order to eliminate or to reduce the horizontal component of magnetic field in the described spatial accommodation not arranging permanent magnet of described permanent magnet.
2. magnetic modulating device according to claim 1, is characterized in that, also comprises a connector, and a described 2n modulation arm connects as one by described connector, and a described 2n modulation arm is positioned at the homonymy of described connector.
3. magnetic modulating device according to claim 1, is characterized in that, also comprises m connector, and a described 2n modulation arm is divided into the equal or m group not etc. of quantity, and described m group modulation arm correspondence connects by a described m connector, the integer of m >=2.
4. the magnetic modulating device according to Claims 2 or 3, is characterized in that, described modulation arm extends to form modulation auxiliary to the opposite side of described connector.
5. magnetic modulating device according to claim 1, is characterized in that, the opposite sides forming described two modulation arm of described spatial accommodation arranges respectively or one of them arranges protuberance.
6. magnetic modulating device according to claim 1, is characterized in that, the top of a described 2n modulation arm flushes, and the top of described permanent magnet is not higher than the top of described modulation arm.
7. magnetic modulating device according to claim 1, is characterized in that, described magnetic modulating device is structure as a whole, or forms by multiple schistose texture is stacked.
8. magnetic modulating device according to claim 1, is characterized in that, described permanent magnet is structure as a whole, or forms by multiple schistose texture is stacked.
9. magnetic modulating device according to claim 1, is characterized in that, described magnetic conduction arm adopts permeability magnetic material to make, or makes of non-magnet material, and shows to apply magnetic conductive material layer at it.
10. magnetic modulating device according to claim 9, is characterized in that, described permeability magnetic material comprises permalloy or ferrite or siliconized plate.
11. 1 kinds of Magnetic Sensors, comprising:
Magnetic chip, for responding to the magnetic field of anti-counterfeiting mark;
Wiring board, for supporting and be electrically connected the input/output terminal of described magnetic chip;
Capillary, as the input/output terminal of Magnetic Sensor, is electrically connected by described wiring board is corresponding with the input/output terminal of described magnetic chip;
Permanent magnet, for the weak magnetic anti-counterfeiting mark of premagnetization;
It is characterized in that, also comprise magnetic modulating device, for regulating the Distribution of Magnetic Field of described permanent magnet;
Described magnetic modulating device comprises the modulation arm of 2n magnetic conduction, n be more than or equal to 2 integer; A described 2n modulation arm is oppositely arranged at interval successively, and to make to form a spatial accommodation between any two adjacent described modulation arm, described 2n modulation arm forms 2n-1 described spatial accommodation; From spatial accommodation counting described in outermost, the described spatial accommodation being counted as odd numbers arranges permanent magnet, and the described spatial accommodation being counted as even numbers arranges described magnetic chip; Described modulation arm is in order to eliminate or to reduce the horizontal component of magnetic field in the described spatial accommodation at described magnetic chip place of described permanent magnet.
12. Magnetic Sensors according to claim 11, is characterized in that, described magnetic modulating device also comprises a connector, and a described 2n modulation arm connects as one by described connector, and a described 2n modulation arm is positioned at the homonymy of described connector.
13. Magnetic Sensors according to claim 11, it is characterized in that, described magnetic modulating device also comprises m connector, and a described 2n modulation arm is divided into the equal or m group not etc. of quantity, described m group modulation arm correspondence connects by a described m connector, the integer of m >=2.
14. Magnetic Sensors according to claim 11, it is characterized in that, described n is 2, namely described magnetic modulating device comprises the first modulation arm, the second modulation arm, the 3rd modulation arm and the 4th modulation arm, the opposite sides of described first modulation arm and described second modulation arm forms the first spatial accommodation, the opposite sides of described second modulation arm and described 3rd modulation arm forms the second spatial accommodation, and the opposite sides of described 3rd modulation arm and described 4th modulation arm forms the 3rd spatial accommodation; Described magnetic chip is located at described second spatial accommodation, and described permanent magnet is located at described first spatial accommodation and described 3rd spatial accommodation.
15. Magnetic Sensors according to claim 14, it is characterized in that, described magnetic modulating device also comprises connector, described first modulation arm, described second modulation arm, described 3rd modulation arm and described 4th modulation arm connect as one by described connector, and described first modulation arm, described second modulation arm, described 3rd modulation arm and described 4th modulation arm are positioned at the homonymy of described connector.
16. Magnetic Sensors according to claim 14, it is characterized in that, described magnetic modulating device also comprises two connectors, described first modulation arm and described second modulation arm are connected as one structure by described two connectors respectively, and described 3rd modulation arm and described 4th modulation arm are connected as one structure, and described first modulation arm, described second modulation arm, described 3rd modulation arm and described 4th modulation arm are positioned at the homonymy of described connector.
17. Magnetic Sensors according to claim 15 or 16, is characterized in that, described first modulation arm and described 4th modulation arm extend to form each formation one to the opposite side of described connector and modulate auxiliary.
18. Magnetic Sensors according to claim 11, it is characterized in that, described n is 3, namely described magnetic modulating device comprises the first modulation arm, second modulation arm, 3rd modulation arm, 4th modulation arm, 5th modulation arm and the 6th modulation arm, the opposite sides of described first modulation arm and described second modulation arm forms the first spatial accommodation, the opposite sides of described second modulation arm and described 3rd modulation arm forms the second spatial accommodation, the opposite sides of described 3rd modulation arm and described 4th modulation arm forms the 3rd spatial accommodation, the opposite sides of described 4th modulation arm and described 5th modulation arm forms the 4th spatial accommodation, the opposite sides of described 5th modulation arm and described 6th modulation arm forms the 5th spatial accommodation,
Described permanent magnet is located at described first spatial accommodation, described 3rd spatial accommodation and described 5th spatial accommodation; Described magnetic chip is located at described second spatial accommodation and described 4th spatial accommodation.
19. Magnetic Sensors according to claim 18, it is characterized in that, described magnetic modulating device also comprises connector, described first modulation arm, described second modulation arm, described 3rd modulation arm, described 4th modulation arm, described 5th modulation arm and described 6th modulation arm connect as one by described connector, and described first modulation arm, described second modulation arm, described 3rd modulation arm, described 4th modulation arm, described 5th modulation arm and described 6th modulation arm are positioned at the homonymy of described connector.
20. Magnetic Sensors according to claim 18, it is characterized in that, described magnetic modulating device also comprises two connectors, described first modulation arm, described second modulation arm and described 3rd modulation arm connect as one by described connector respectively, and described 4th modulation arm, described 5th modulation arm and described 6th modulation arm are connected as one, described first modulation arm, described second modulation arm, described 3rd modulation arm, described 4th modulation arm, described 5th modulation arm and described 6th modulation arm are positioned at the homonymy of described connector.
21. Magnetic Sensors according to claim 19 or 20, is characterized in that, described first modulation arm and described 6th modulation arm extend each formation one respectively to the opposite side of described connector and modulate auxiliary.
22. Magnetic Sensors according to claim 11, it is characterized in that, in the opposite sides arranging the described modulation arm corresponding to the described spatial accommodation of described permanent magnet, protuberance is set, and/or, in the opposite sides arranging the described modulation arm corresponding to the described spatial accommodation of described magnetic chip, protuberance is set.
23. Magnetic Sensors according to claim 11, is characterized in that, described magnetic modulating device is structure as a whole, or form by the thin slice of multiple sheet is stacked.
24. Magnetic Sensors according to claim 11, is characterized in that, described permanent magnet is structure as a whole, or form by multiple schistose texture is stacked.
25. Magnetic Sensors according to claim 11, is characterized in that, described magnetic conduction arm adopts permeability magnetic material to make, or makes of non-magnet material, and show to apply magnetic conductive material layer at it.
26. Magnetic Sensors according to claim 25, is characterized in that, described permeability magnetic material comprises permalloy or ferrite or siliconized plate.
27. Magnetic Sensors according to claim 11, it is characterized in that, comprise shell, be provided with window on the housing, described magnetic chip, described wiring board and described magnetic modulating device are located in described shell, described magnetic chip, described magnetic modulating device are relative with described window with described permanent magnet, and one end of described capillary is stretched out in described shell;
Described wiring board is provided with the through hole passed for described modulation arm, and described modulation arm protrudes upward the top of described wiring board below described wiring board by described through hole.
28. Magnetic Sensors according to claim 11, it is characterized in that, described magnetic chip comprises inductive magnetic thin film and chip bonding pad and supports the chip basal body of described inductive magnetic thin film and chip bonding pad, and described chip bonding pad is electrically connected as the input/output terminal of described chip is corresponding with described magnetic induction film;
Described 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.
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| JP2018017696A (en) * | 2016-07-29 | 2018-02-01 | キヤノン電子株式会社 | Magnetism identification device |
| JP2019184382A (en) * | 2018-04-09 | 2019-10-24 | キヤノン電子株式会社 | Magnetic identifying device |
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