CN103268658B - Magnetic moment orientation device for identifying magnetic graph on magnetic stripe and identification method of magnetic moment orientation device - Google Patents
Magnetic moment orientation device for identifying magnetic graph on magnetic stripe and identification method of magnetic moment orientation device Download PDFInfo
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- CN103268658B CN103268658B CN201310131834.1A CN201310131834A CN103268658B CN 103268658 B CN103268658 B CN 103268658B CN 201310131834 A CN201310131834 A CN 201310131834A CN 103268658 B CN103268658 B CN 103268658B
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Abstract
The invention discloses a magnetic moment orientation device for identifying a magnetic graph on a magnetic stripe. The device comprises a permanent magnet, an L-shaped soft magnet and a magnetoresistance chip. The soft magnet comprises a bottom part and a side wall; the permanent magnet is arranged at the bottom of the soft magnet; one side face of the soft magnet is opposite to the side wall of the soft magnet; a slit is formed between the side face of the soft magnet and the side wall of the soft magnet; the magnetoresistance chip is arranged at the outer side of the side wall of the soft magnet; the direction of the magnetization intensity of the permanent magnet is vertical to the bottom part of the soft magnet; and the direction of a magnetic field formed above the slit by the permanent magnet and the soft magnet is parallel with the upper end face of the permanent magnet and the upper end of the soft magnet. According to the magnetic moment orientation device for identifying the magnetic graph on the magnetic stripe, the authenticity of paper money can be identified by detecting the magnetic moment orientation of a magnetic dielectric material in the magnetic graph on the magnetic stripe of the paper money.
Description
Technical field
The present invention relates to a kind of the magnetic moment orientation device and the recognition methods thereof that identify magnetic pattern thereon on magnetic stripe.
Background technology
Usually, include magnetic stripe in bank note such as Renminbi, magnetic stripe has magnetic pattern thereon, and magnetic pattern thereon contains magnetic media material.Renminbi truth identification instrument is adopted to detect the magnetic of magnetic media material and the true and false of identifiable design Renminbi in Renminbi.In prior art, Renminbi truth identification instrument using the having of magnetic medium magnetism of material in Renminbi, without the judgment basis as the Renminbi true and false, or using strong, the weak judgment basis as the Renminbi true and false of the magnetic of magnetic medium material in Renminbi.
When using Renminbi truth identification instrument to differentiate the true and false of Renminbi, be arranged at the magnetic field of permanent magnet generation perpendicular to bank note place plane of Renminbi truth identification instrument inside, this magnetic field can make the magnetic medium material magnetization in Renminbi, and the magnetic medium material after being magnetized produces new magnetic field.The magnetic field produced by the magnetic medium material after detection is magnetized and the true and false of identifiable design Renminbi.
In prior art, the magneto sensor for Renminbi truth identification instrument mainly contains Hall element, giant magnetoresistance (GMR) element and tunnel magneto resistance (TMR) element.Hall element such as telluride indium (InSb) Hall element is for detecting the magnetic-field component perpendicular to Renminbi place in-plane that in Renminbi, magnetic medium material produces.GMR element and TMR element are for detecting the magnetic-field component being parallel to Renminbi place in-plane that in Renminbi, magnetic medium material produces.During use, the above-mentioned magneto sensor for Renminbi truth identification instrument detects the magnetic field that magnetic medium material produces while by the magnetic medium material magnetization in Renminbi.Therefore, the magnetic moment orientation of magnetic medium material is identical with the magnetic direction that the permanent magnet of Renminbi truth identification instrument inside produces.In this case, Renminbi truth identification instrument can only detect presence or absence and the power of the magnetic of magnetic medium material in Renminbi, the magnetic moment orientation of magnetic medium material in Renminbi can not be detected, thus can not using the judgment basis of the magnetic moment orientation of magnetic medium material in Renminbi as the Renminbi true and false.Therefore, the recognition capability of Renminbi truth identification instrument to the Renminbi true and false of prior art is lower, and limits the raising of RMB anti-counterfeiting ability.
At present, be starved of a kind of the magnetic moment orientation device and the recognition methods thereof that identify magnetic pattern thereon on magnetic stripe, this device can not only detect presence or absence and the power of magnetic medium magnetism of material in Renminbi, and the magnetic moment orientation of magnetic medium material in Renminbi can be detected, higher to the recognition capability of the Renminbi true and false, be conducive to the anti-counterfeit capability improving Renminbi.
Summary of the invention
The object of this invention is to provide a kind of the magnetic moment orientation device and the recognition methods thereof that identify magnetic pattern thereon on magnetic stripe.
On identification magnetic stripe provided by the invention, the magnetic moment orientation device of magnetic pattern thereon comprises permanent magnet, the soft magnetic bodies of L shape and magneto-resistor chip; Described soft magnetic bodies comprises bottom and sidewall, and described permanent magnet is located on the bottom of described soft magnetic bodies, and a side of described permanent magnet and the sidewall of described soft magnetic bodies in opposite directions, and form slit between the sidewall of the side of described permanent magnet and described soft magnetic bodies; Described magneto-resistor chip is located at the side-wall outer side of described soft magnetic bodies, the direction of the magnetization of described permanent magnet is perpendicular to the bottom of described soft magnetic bodies, and the direction in the magnetic field that described permanent magnet and described soft magnetic bodies are formed above described slit is parallel to the upper surface of described permanent magnet and the upper surface of described soft magnetic bodies; Described magneto-resistor chip adopts half-bridge or full-bridge, and the sensitive direction of each brachium pontis of this half-bridge or full-bridge is identical, and each brachium pontis of this half-bridge or full-bridge comprises at least one magnetoresistive element.
Preferably, described permanent magnet is cuboid.
Preferably, the sidewall of described soft magnetic bodies is cuboid.
Preferably, the first inclined-plane is provided with between the side of described permanent magnet and its upper surface.
Preferably, the second inclined-plane is provided with between the medial surface of the sidewall of described soft magnetic bodies and its upper surface.
Preferably, the half-bridge of described magneto-resistor chip or each brachium pontis of full-bridge comprise the magnetoresistive element of multiple series connection and/or parallel connection.
Preferably, described magnetoresistive element is GMR element or TMR element.
Preferably, the material of described permanent magnet is neodymium iron boron, SmCo or hard ferrite.
Preferably, the material of described soft magnetic bodies is siliconized plate, permalloy or soft magnetic ferrite.
On the described identification magnetic stripe of application provided by the invention magnetic pattern thereon magnetic moment orientation device identification magnetic stripe on the magnetic moment orientation method of magnetic pattern thereon comprise the steps:
Magnetic pattern thereon on magnetic stripe is placed in identify magnetic pattern thereon on magnetic stripe magnetic moment orientation device above, and to make on magnetic stripe magnetic pattern thereon along being parallel to direction, permanent magnet upper surface by permanent magnet to magneto-resistor chip motion;
When on magnetic stripe, magnetic pattern thereon moves to directly over permanent magnet, the magnetic field that permanent magnet and soft magnetic bodies are formed reaches peak value along the component perpendicular to direction, permanent magnet upper surface, magnetic media material on magnetic stripe in magnetic pattern thereon is once magnetized along the component perpendicular to direction, permanent magnet upper surface by the magnetic field that permanent magnet and soft magnetic bodies are formed, by the magnetic moment orientation of the whole magnetic media material in magnetic pattern thereon on the magnetic stripe after once magnetizing along perpendicular to direction, permanent magnet upper surface;
When on magnetic stripe, magnetic pattern thereon moves to directly over slit, the magnetic field that permanent magnet and soft magnetic bodies are formed reaches peak value along the component being parallel to direction, permanent magnet upper surface, easy axis on magnetic stripe in magnetic pattern thereon is magnetized along the component secondary being parallel to direction, permanent magnet upper surface along the magnetic media material being parallel to direction, permanent magnet upper surface by the magnetic field that permanent magnet and soft magnetic bodies are formed, on magnetic stripe after being magnetized by secondary, in magnetic pattern thereon, easy axis edge is parallel to the magnetic moment orientation of the magnetic media material in direction, permanent magnet upper surface along being parallel to direction, permanent magnet upper surface, and on magnetic stripe after being magnetized by secondary in magnetic pattern thereon easy axis along the magnetic moment orientation perpendicular to the magnetic media material in direction, permanent magnet upper surface still along perpendicular to direction, permanent magnet upper surface,
When above magnetic pattern thereon on magnetic stripe moves to magneto-resistor chip, on magnetic stripe, in magnetic pattern thereon, the distribution of the magnetic induction density that the easy axis magnetic media material that edge is parallel and perpendicular to direction, permanent magnet upper surface respectively produces above magneto-resistor chip has obvious distinguishing characteristics, and magneto-resistor chip can distinguish the magnetic moment orientation of the magnetic media material that easy axis is different in magnetic pattern thereon on magnetic stripe by the distribution detecting the magnetic induction density that magnetic media material produces above magnetoresistive chip in magnetic pattern thereon on magnetic stripe.
the present invention has following beneficial effect:
(1) on described identification magnetic stripe, the magnetic moment orientation device of magnetic pattern thereon can not only detect presence or absence and the power of magnetic medium magnetism of material in magnetic pattern thereon on magnetic stripe, and the magnetic moment orientation of magnetic medium material in magnetic pattern thereon on magnetic stripe can be detected, thus can by detecting the true and false of the magnetic moment orientation identification bank note of magnetic medium material in magnetic pattern thereon on bank note magnetic stripe, higher to the recognition capability of forge or true or paper money, and be conducive to the anti-counterfeit capability improving bank note;
(2) on described identification magnetic stripe, the magneto-resistor chip of the magnetic moment orientation device of magnetic pattern thereon adopts full-bridge, therefore has the ability of very strong suppression common mode magnetic interference.
Accompanying drawing explanation
The schematic diagram of the magnetic moment orientation device of magnetic pattern thereon on the identification magnetic stripe that Fig. 1 provides for the embodiment of the present invention 1;
The sectional view of the magnetic moment orientation device of magnetic pattern thereon on the identification magnetic stripe that Fig. 2 provides for the embodiment of the present invention 1;
The structural representation of the half-bridge of the magneto-resistor chip of the magnetic moment orientation device of magnetic pattern thereon on the identification magnetic stripe that Fig. 3 provides for the embodiment of the present invention 1;
The equivalent circuit diagram of the half-bridge of the magneto-resistor chip of the magnetic moment orientation device of magnetic pattern thereon on the identification magnetic stripe that Fig. 4 provides for the embodiment of the present invention 1;
On the identification magnetic stripe that Fig. 5 provides for the embodiment of the present invention 1 magnetic pattern thereon magnetic moment orientation device above magnetic field profile schematic diagram;
Fig. 6 is by the curve map of the magnetic induction density B of the magnetic media material in magnetic pattern thereon on the magnetic stripe after once magnetizing with the change in location of X-direction;
Fig. 7 is the curve map of magnetic induction density B with the change in location of X-direction of magnetic media material on the magnetic stripe after being magnetized by secondary in magnetic pattern thereon;
The schematic diagram of the magnetic moment orientation device of magnetic pattern thereon on the identification magnetic stripe that Fig. 8 provides for the embodiment of the present invention 2;
The sectional view of the magnetic moment orientation device of magnetic pattern thereon on the identification magnetic stripe that Fig. 9 provides for the embodiment of the present invention 2;
The structural representation of the full-bridge of the magneto-resistor chip of the magnetic moment orientation device of magnetic pattern thereon on the identification magnetic stripe that Figure 10 provides for the embodiment of the present invention 2;
The equivalent circuit diagram of the full-bridge of the magneto-resistor chip of the magnetic moment orientation device of magnetic pattern thereon on the identification magnetic stripe that Figure 11 provides for the embodiment of the present invention 2;
On the identification magnetic stripe that Figure 12 provides for the embodiment of the present invention 2 magnetic pattern thereon magnetic moment orientation device above magnetic field profile schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, content of the present invention is further described.
embodiment 1
On the identification magnetic stripe that the present embodiment provides, the magnetic moment orientation device of magnetic pattern thereon comprises permanent magnet 1, the soft magnetic bodies 2 of L shape and magneto-resistor chip 3, as depicted in figs. 1 and 2.Soft magnetic bodies 2 comprises bottom 21 and sidewall 22.In the present embodiment, the sidewall 22 of permanent magnet 1 and soft magnetic bodies 2 is all in such as cuboid.Permanent magnet 1 is located on the bottom 21 of soft magnetic bodies 2.A side 11 of permanent magnet 1 and the sidewall 22 of soft magnetic bodies 2 in opposite directions, and form slit 4 between the side 11 of permanent magnet 1 and the sidewall 22 of soft magnetic bodies 2.Magneto-resistor chip 3 is located at the outside of the sidewall 22 of soft magnetic bodies 2.The direction 5 of the magnetization of permanent magnet 1 is perpendicular to the bottom 21 of soft magnetic bodies 2, and namely the direction 5 of the magnetization of permanent magnet 1 is parallel to Z-direction.As shown in Figure 2, the magnetic field that permanent magnet 1 and soft magnetic bodies 2 are formed forms a closed magnetic circuit loop, and the direction 6 in magnetic field that permanent magnet 1 and soft magnetic bodies 2 are formed above slit 4 is parallel to the upper surface 12 of permanent magnet 1 and the upper surface 23 of soft magnetic bodies 2, the direction 6 in magnetic field that namely permanent magnet 1 and soft magnetic bodies 2 are formed above slit 4 is parallel to X-direction.The material of permanent magnet 1 is neodymium iron boron, SmCo or hard ferrite.The material of soft magnetic bodies 2 is siliconized plate, permalloy or soft magnetic ferrite.
Magneto-resistor chip 3 adopts the circuit structure of half-bridge or full-bridge.In the present embodiment, magneto-resistor chip 3 adopts such as half-bridge 31.As shown in Figure 3 and Figure 4, half-bridge 31 comprises the identical brachium pontis of two sensitive directions, i.e. the first brachium pontis 311 and the second brachium pontis 312.Each brachium pontis of half-bridge 31 comprises at least one magnetoresistive element.When each brachium pontis of half-bridge 31 comprises multiple magnetoresistive element, the plurality of magnetoresistive element series connection and/or parallel connection.Magnetoresistive element is GMR element or TMR element.In the present embodiment, each brachium pontis of half-bridge 31 comprises three GMR elements of such as connecting.The sensitive direction of the first brachium pontis 311 and the second brachium pontis 312 all along sensitive direction 7, as shown in Figure 3.The magnetic field that magnetic media material on magnetic stripe in magnetic pattern thereon produces is H along the component of Z-direction
z, and this magnetic-field component H
zsize change in gradient.As shown in Figure 3, the magnetic-field component H at the first brachium pontis 311 and the second brachium pontis 312 position place
zvary in size.In the present embodiment, when above magnetic pattern thereon on magnetic stripe is positioned at magneto-resistor chip 3, the magnetic-field component H at the first brachium pontis 311 position place
zbe greater than the magnetic-field component H at the second brachium pontis 312 position place
z.Two input ends of half-bridge 31 are In1 and In2, wherein input end In2 ground connection, as shown in Figure 4.The output terminal of half-bridge 31 is Out.When applying constant voltage between input end In1 and input end In2, the resistance change of the first brachium pontis 311 and the second brachium pontis 312 varies in size, and therefore output terminal Out is by output voltage signal.
Fig. 5 be the present embodiment identification magnetic stripe on magnetic pattern thereon magnetic moment orientation device above magnetic field profile schematic diagram.The component H of the Z-direction in the magnetic field that permanent magnet 1 and soft magnetic bodies 2 are formed
zwith the change in location of X-direction curve as shown in solid lines in fig. 5.Position directly over permanent magnet 1, the component H of the Z-direction in the magnetic field that permanent magnet 1 and soft magnetic bodies 2 are formed
zreach peak value.The component H of the X-direction in the magnetic field that permanent magnet 1 and soft magnetic bodies 2 are formed
xwith the change in location of X-direction curve as shown in broken line in fig. 5.Position directly over slit 4, the component H of the X-direction in the magnetic field that permanent magnet 1 and soft magnetic bodies 2 are formed
xreach peak value.
On the identification magnetic stripe of application the present embodiment magnetic pattern thereon magnetic moment orientation device identification magnetic stripe on the method for magnetic pattern thereon magnetic moment orientation as follows:
Magnetic pattern thereon on magnetic stripe is placed in identify magnetic pattern thereon on magnetic stripe magnetic moment orientation device above, and to make on magnetic stripe magnetic pattern thereon along being parallel to permanent magnet 1 direction, upper surface 12 and X-direction is moved to magneto-resistor chip 3 by permanent magnet 1;
When magnetic pattern thereon on magnetic stripe moves to directly over permanent magnet 1, the magnetic field that permanent magnet 1 and soft magnetic bodies 2 are formed is along the component H perpendicular to permanent magnet 1 direction, upper surface 12 and Z-direction
zreach peak value, the magnetic field that the magnetic media material on magnetic stripe in magnetic pattern thereon is formed by permanent magnet 1 and soft magnetic bodies 2 is along the component H perpendicular to permanent magnet 1 direction, upper surface 12 and Z-direction
zonce magnetize, by the magnetic moment orientation of the whole magnetic media material in magnetic pattern thereon on the magnetic stripe after once magnetizing along perpendicular to permanent magnet 1 direction, upper surface 12 and Z-direction, by the magnetic media material magnetic induction density B that position produces immediately below it in magnetic pattern thereon on the magnetic stripe after once magnetizing with the change in location of X-direction curve as shown in Figure 6;
When magnetic pattern thereon on magnetic stripe moves to directly over slit 4, the magnetic field that permanent magnet 1 and soft magnetic bodies 2 are formed is along the component H being parallel to permanent magnet 1 direction, upper surface 12 and X-direction
xreach peak value, certain media material on magnetic stripe in magnetic pattern thereon, namely the magnetic field that formed by permanent magnet 1 and soft magnetic bodies 2 along the magnetic media material being parallel to permanent magnet 1 direction, upper surface 12 and X-direction of easy axis is along the component H being parallel to permanent magnet 1 direction, upper surface 12 and X-direction
xsecondary magnetizes, on magnetic stripe after being magnetized by secondary, in magnetic pattern thereon, easy axis edge is parallel to the magnetic moment orientation of the magnetic media material of permanent magnet 1 direction, upper surface 12 and X-direction along being parallel to permanent magnet 1 direction, upper surface 12 and X-direction, and on magnetic stripe after being magnetized by secondary in magnetic pattern thereon easy axis along the magnetic moment orientation of the magnetic media material perpendicular to permanent magnet 1 direction, upper surface 12 and Z-direction still along perpendicular to permanent magnet 1 direction, upper surface 12 and Z-direction, magnetic media material on magnetic stripe after being magnetized by secondary in magnetic pattern thereon immediately below it position produce magnetic induction density B with the change in location of X-direction curve as shown in Figure 7,
When above magnetic pattern thereon on magnetic stripe moves to magneto-resistor chip 3, as can be seen from Fig. 6 and Fig. 7, on magnetic stripe, in magnetic pattern thereon, easy axis has obvious distinguishing characteristics along the distribution of the magnetic induction density B being parallel to permanent magnet 1 direction, upper surface 12 and X-direction and producing above magneto-resistor chip 3 along the magnetic media material perpendicular to permanent magnet 1 direction, upper surface 12 and Z-direction respectively, therefore, magneto-resistor chip 3 can distinguish the magnetic moment orientation of the magnetic media material that easy axis is different in magnetic pattern thereon on magnetic stripe by the distribution detecting the magnetic induction density B that magnetic media material produces above magnetoresistive chip 3 in magnetic pattern thereon on magnetic stripe.
embodiment 2
On the identification magnetic stripe that the present embodiment provides, the magnetic moment orientation device of magnetic pattern thereon comprises permanent magnet 1, the soft magnetic bodies 2 of L shape and magneto-resistor chip 3, as shown in Figure 8 and Figure 9.Soft magnetic bodies 2 comprises bottom 21 and sidewall 22.Permanent magnet 1 is located on the bottom 21 of soft magnetic bodies 2.A side 11 of permanent magnet 1 and the sidewall 22 of soft magnetic bodies 2 in opposite directions, and form slit 4 between the side 11 of permanent magnet 1 and the sidewall 22 of soft magnetic bodies 2.In the present embodiment, between the side 11 of permanent magnet 1 and its upper surface 12, be provided with the first inclined-plane 13, and be provided with the second inclined-plane 24 between the medial surface 25 of the sidewall 22 of soft magnetic bodies 2 and its upper surface 23.First inclined-plane 13 and the second inclined-plane 24 are in inverted "eight" shape.Magneto-resistor chip 3 is located at the outside of the sidewall 22 of soft magnetic bodies 2.The direction 5 of the magnetization of permanent magnet 1 is perpendicular to the bottom 21 of soft magnetic bodies 2, and namely the direction 5 of the magnetization of permanent magnet 1 is parallel to Z-direction.As shown in Figure 9, the magnetic field that permanent magnet 1 and soft magnetic bodies 2 are formed forms a closed magnetic circuit loop, and the direction 6 in magnetic field that permanent magnet 1 and soft magnetic bodies 2 are formed above slit 4 is parallel to the upper surface 12 of permanent magnet 1 and the upper surface 23 of soft magnetic bodies 2, the direction 6 in magnetic field that namely permanent magnet 1 and soft magnetic bodies 2 are formed above slit 4 is parallel to X-direction.The material of permanent magnet 1 is neodymium iron boron, SmCo or hard ferrite.The material of soft magnetic bodies 2 is siliconized plate, permalloy or soft magnetic ferrite.
Magneto-resistor chip 3 adopts the circuit structure of half-bridge or full-bridge.In the present embodiment, magneto-resistor chip 3 adopts such as full-bridge 32.As shown in Figure 10 and Figure 11, full-bridge 32 comprises the identical brachium pontis of four sensitive directions, i.e. the first brachium pontis 321, second brachium pontis 322, the 3rd brachium pontis 323 and four bridge legs 324.Each brachium pontis of full-bridge 32 comprises at least one magnetoresistive element.When each brachium pontis of full-bridge 32 comprises multiple magnetoresistive element, the plurality of magnetoresistive element series connection and/or parallel connection.Magnetoresistive element is GMR element or TMR element.In the present embodiment, each brachium pontis of full-bridge 32 comprises five TMR elements such as in parallel.The sensitive direction of the first brachium pontis 321, second brachium pontis 322, the 3rd brachium pontis 323 and four bridge legs 324 is all along sensitive direction 7.The magnetic field that magnetic media material on magnetic stripe in magnetic pattern thereon produces is H along the component of Z-direction
z, and this magnetic-field component H
zsize change in gradient.As shown in Figure 10, the magnetic-field component H at the first brachium pontis 321 and the second brachium pontis 322 position place
zsize and the magnetic-field component H at the 3rd brachium pontis 323 and four bridge legs 324 position place
zvary in size.In the present embodiment, when above magnetic pattern thereon on magnetic stripe is positioned at magneto-resistor chip 3, the magnetic-field component H at the first brachium pontis 321 and the second brachium pontis 322 position place
zbe greater than the magnetic-field component H at the 3rd brachium pontis 323 and four bridge legs 324 position place
z.Two input ends of full-bridge 32 are In1 and In2, wherein input end In2 ground connection, as shown in figure 11.The output terminal of full-bridge 32 is Out1 and Out2.When applying constant voltage between input end In1 and input end In2, first brachium pontis 321 or the resistance change size of the second brachium pontis 322 and the resistance change of the 3rd brachium pontis 323 or four bridge legs 324 vary in size, therefore between output terminal Out1 and Out2 by output voltage signal.
Under the effect in common mode magnetic field, the resistance change of each brachium pontis of full-bridge 32 is identical, full-bridge 32 not output voltage signal.Therefore, full-bridge 32 has the ability of very strong suppression common mode magnetic interference, thus makes to identify that the magnetic moment orientation device of magnetic pattern thereon on magnetic stripe has the ability of very strong suppression common mode magnetic interference.
Figure 12 be the present embodiment identification magnetic stripe on magnetic pattern thereon magnetic moment orientation device above magnetic field profile schematic diagram.The component H of the Z-direction in the magnetic field that permanent magnet 1 and soft magnetic bodies 2 are formed
zwith the curve of the change in location of X-direction as shown in the solid line in Figure 12.Position directly over permanent magnet 1, the component H of the Z-direction in the magnetic field that permanent magnet 1 and soft magnetic bodies 2 are formed
zreach peak value.The component H of the X-direction in the magnetic field that permanent magnet 1 and soft magnetic bodies 2 are formed
xwith the change in location of X-direction curve as shown by the dashed lines of figure 12.Position directly over slit 4, the component H of the X-direction in the magnetic field that permanent magnet 1 and soft magnetic bodies 2 are formed
xreach peak value.
On described identification magnetic stripe, the magnetic moment orientation device of magnetic pattern thereon can not only detect presence or absence and the power of magnetic medium magnetism of material in magnetic pattern thereon on magnetic stripe, and the magnetic moment orientation of magnetic medium material in magnetic pattern thereon on magnetic stripe can be detected, thus can by detecting the true and false of the magnetic moment orientation identification bank note of magnetic medium material in magnetic pattern thereon on magnetic stripe, higher to the recognition capability of forge or true or paper money, and be conducive to the anti-counterfeit capability improving bank note; On described identification magnetic stripe, the magneto-resistor chip of the magnetic moment orientation device of magnetic pattern thereon adopts full-bridge, therefore has the ability of very strong suppression common mode magnetic interference.
Should be appreciated that above is illustrative and not restrictive by preferred embodiment to the detailed description that technical scheme of the present invention is carried out.Those of ordinary skill in the art can modify to the technical scheme described in each embodiment on the basis of reading instructions of the present invention, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. identify the magnetic moment orientation device of magnetic pattern thereon on magnetic stripe, it is characterized in that, this device comprises permanent magnet (1), the soft magnetic bodies (2) of L shape and magneto-resistor chip (3);
Described soft magnetic bodies (2) comprises bottom (21) and sidewall (22), described permanent magnet (1) is located on the bottom (21) of described soft magnetic bodies (2), a side (11) of described permanent magnet (1) and the sidewall (22) of described soft magnetic bodies (2) in opposite directions, and form slit (4) between the side (11) of described permanent magnet (1) and the sidewall (22) of described soft magnetic bodies (2);
Described magneto-resistor chip (3) is located at sidewall (22) outside of described soft magnetic bodies (2), the direction (5) of the magnetization of described permanent magnet (1) is perpendicular to the bottom (21) of described soft magnetic bodies (2), and the direction (6) in the magnetic field that described permanent magnet (1) and described soft magnetic bodies (2) are formed in described slit (4) top is parallel to the upper surface (12) of described permanent magnet (1) and the upper surface (23) of described soft magnetic bodies (2);
Described magneto-resistor chip (3) adopts half-bridge or full-bridge, and the sensitive direction of each brachium pontis of this half-bridge or full-bridge is identical, and each brachium pontis of this half-bridge or full-bridge comprises at least one magnetoresistive element.
2. the magnetic moment orientation device of magnetic pattern thereon on identification magnetic stripe according to claim 1, it is characterized in that, described permanent magnet (1) is cuboid.
3. the magnetic moment orientation device of magnetic pattern thereon on identification magnetic stripe according to claim 1 and 2, it is characterized in that, the sidewall (22) of described soft magnetic bodies (2) is cuboid.
4. the magnetic moment orientation device of magnetic pattern thereon on identification magnetic stripe according to claim 1, it is characterized in that, between the side (11) of described permanent magnet (1) and its upper surface (12), be provided with the first inclined-plane (13).
5. the magnetic moment orientation device of magnetic pattern thereon on the identification magnetic stripe according to claim 1 or 4, it is characterized in that, between the medial surface (25) of the sidewall (22) of described soft magnetic bodies (2) and its upper surface (23), be provided with the second inclined-plane (24).
6. the magnetic moment orientation device of magnetic pattern thereon on identification magnetic stripe according to claim 1, it is characterized in that, the described half-bridge of magneto-resistor chip (3) or each brachium pontis of full-bridge comprise the magnetoresistive element of multiple series connection and/or parallel connection.
7. on the identification magnetic stripe according to claim 1 or 6, the magnetic moment orientation device of magnetic pattern thereon, is characterized in that, described magnetoresistive element is GMR element or TMR element.
8. on the identification magnetic stripe according to claim 1,2 or 4, the magnetic moment orientation device of magnetic pattern thereon, is characterized in that, the material of described permanent magnet (1) is neodymium iron boron, SmCo or hard ferrite.
9. on the identification magnetic stripe according to claim 1 or 3, the magnetic moment orientation device of magnetic pattern thereon, is characterized in that, the material of described soft magnetic bodies (2) is siliconized plate, permalloy or soft magnetic ferrite.
10. the method for the magnetic moment orientation of magnetic pattern thereon on the magnetic moment orientation device identification magnetic stripe applying magnetic pattern thereon on above-mentioned identification magnetic stripe, it is characterized in that, the method comprises the steps:
Magnetic pattern thereon on magnetic stripe is placed in identify magnetic pattern thereon on magnetic stripe magnetic moment orientation device above, and magnetic pattern thereon on magnetic stripe is moved to magneto-resistor chip (3) by permanent magnet (1) along being parallel to permanent magnet (1) upper surface (12) direction;
When magnetic pattern thereon on magnetic stripe moves to directly over permanent magnet (1), the magnetic field that permanent magnet (1) and soft magnetic bodies (2) are formed reaches peak value along the component perpendicular to permanent magnet (1) upper surface (12) direction, magnetic media material on magnetic stripe in magnetic pattern thereon is once magnetized along the component perpendicular to permanent magnet (1) upper surface (12) direction by the magnetic field that permanent magnet (1) and soft magnetic bodies (2) are formed, by the magnetic moment orientation of the whole magnetic media material in magnetic pattern thereon on the magnetic stripe after once magnetizing along perpendicular to permanent magnet (1) upper surface (12) direction,
When magnetic pattern thereon on magnetic stripe moves to directly over slit (4), the magnetic field that permanent magnet (1) and soft magnetic bodies (2) are formed reaches peak value along the component being parallel to permanent magnet (1) upper surface (12) direction, easy axis on magnetic stripe in magnetic pattern thereon is magnetized along the component secondary being parallel to permanent magnet (1) upper surface (12) direction along the magnetic media material being parallel to permanent magnet (1) upper surface (12) direction by the magnetic field that permanent magnet (1) and soft magnetic bodies (2) are formed, on magnetic stripe after being magnetized by secondary, in magnetic pattern thereon, easy axis edge is parallel to the magnetic moment orientation of the magnetic media material in permanent magnet (1) upper surface (12) direction along being parallel to permanent magnet (1) upper surface (12) direction, and on magnetic stripe after being magnetized by secondary in magnetic pattern thereon easy axis along the magnetic moment orientation perpendicular to the magnetic media material in permanent magnet (1) upper surface (12) direction still along perpendicular to permanent magnet (1) upper surface (12) direction,
When magnetic pattern thereon on magnetic stripe moves to magneto-resistor chip (3) top, on magnetic stripe, in magnetic pattern thereon, easy axis has obvious distinguishing characteristics along the magnetic media material being parallel and perpendicular to permanent magnet (1) upper surface (12) direction in the distribution of the magnetic induction density of magneto-resistor chip (3) top generation respectively, magneto-resistor chip (3) can distinguish the magnetic moment orientation of the magnetic media material that easy axis is different in magnetic pattern thereon on magnetic stripe by the distribution detecting the magnetic induction density that magnetic media material produces in magnetoresistive chip (3) top in magnetic pattern thereon on magnetic stripe.
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| CN201310131834.1A CN103268658B (en) | 2013-04-16 | 2013-04-16 | Magnetic moment orientation device for identifying magnetic graph on magnetic stripe and identification method of magnetic moment orientation device |
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| CN201310131834.1A CN103268658B (en) | 2013-04-16 | 2013-04-16 | Magnetic moment orientation device for identifying magnetic graph on magnetic stripe and identification method of magnetic moment orientation device |
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| CN104569869B (en) * | 2013-10-21 | 2018-11-02 | 北京嘉岳同乐极电子有限公司 | Magnetic sensor |
| CN106156672B (en) * | 2015-04-22 | 2018-09-18 | 上海天臣防伪技术股份有限公司 | The method that anti-counterfeit recognition is carried out to the anti-counterfeiting mark containing magnetic material |
| JP6550587B2 (en) * | 2016-04-05 | 2019-07-31 | 株式会社ヴィーネックス | Magnetic line sensor and discrimination device using the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101911133A (en) * | 2007-12-28 | 2010-12-08 | 日本电产三协株式会社 | Magnetic pattern detecting apparatus |
| CN202694446U (en) * | 2012-06-19 | 2013-01-23 | 兰州大学 | Currency detector magnetic head |
| CN102968845A (en) * | 2012-10-31 | 2013-03-13 | 江苏多维科技有限公司 | Magnetic-bias currency detecting magnetic head with sensitive direction parallel to detection face |
| CN203217645U (en) * | 2013-04-16 | 2013-09-25 | 无锡乐尔科技有限公司 | Magnetic moment orientation device for indentifying magnetic graphics on magnetic stripe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2549137C2 (en) * | 2010-06-09 | 2015-04-20 | Гизеке Унд Девриент Гмбх | Method and device for inspection of documents of value |
-
2013
- 2013-04-16 CN CN201310131834.1A patent/CN103268658B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101911133A (en) * | 2007-12-28 | 2010-12-08 | 日本电产三协株式会社 | Magnetic pattern detecting apparatus |
| CN202694446U (en) * | 2012-06-19 | 2013-01-23 | 兰州大学 | Currency detector magnetic head |
| CN102968845A (en) * | 2012-10-31 | 2013-03-13 | 江苏多维科技有限公司 | Magnetic-bias currency detecting magnetic head with sensitive direction parallel to detection face |
| CN203217645U (en) * | 2013-04-16 | 2013-09-25 | 无锡乐尔科技有限公司 | Magnetic moment orientation device for indentifying magnetic graphics on magnetic stripe |
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