CN111640237B - Sensor device and system for sensing magnetic security features of a document - Google Patents
Sensor device and system for sensing magnetic security features of a document Download PDFInfo
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- CN111640237B CN111640237B CN202010092021.6A CN202010092021A CN111640237B CN 111640237 B CN111640237 B CN 111640237B CN 202010092021 A CN202010092021 A CN 202010092021A CN 111640237 B CN111640237 B CN 111640237B
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 123
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- 238000000429 assembly Methods 0.000 description 9
- 238000011156 evaluation Methods 0.000 description 5
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- 230000005415 magnetization Effects 0.000 description 4
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- 229910000975 Carbon steel Inorganic materials 0.000 description 2
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- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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- 230000005294 ferromagnetic effect Effects 0.000 description 1
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Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/04—Testing magnetic properties of the materials thereof, e.g. by detection of magnetic imprint
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The invention relates to a sensor device and a system, wherein the sensor device is provided with a first magnet assembly, a second magnet assembly and a sensor assembly. The sensor assembly has a detection zone for sensing a magnetic security feature of a document, the first magnet assembly having at least one first magnet providing a first magnetic field, the second magnet assembly having at least one second magnet providing a second magnetic field, the first magnet having a first lateral surface facing the second magnet assembly and defining a gap space, the second magnet having a second lateral surface facing the first magnet assembly and defining a gap space, wherein the sensor assembly is disposed in the gap space. The correction magnet assembly is arranged in the gap space on a side of the sensor assembly facing away from the detection zone, is inclined with respect to the first and/or second lateral surface, and has at least one correction magnet providing a third magnetic field, the first to third magnetic fields interacting to form a total magnetic field, which penetrates the sensor assembly in a predetermined orientation.
Description
Technical Field
The present invention relates to a sensor device and a system for sensing a magnetic security feature of a document.
Background
A measuring device for measuring magnetic properties of an environment of the measuring device is known from DE 10 2011 110 138 A1 1, which has a sensor wire with at least one magnetoresistive sensor element extending in a wire direction.
The problem underlying the present invention is to provide an improved sensor device and an improved system.
Disclosure of Invention
The above problems are solved by the sensor device and system proposed by the present invention.
It has been recognized that an improved sensor device may be provided by a sensor device having at least a first magnet assembly, a second magnet assembly and a sensor assembly. The sensor assembly has a detection zone for sensing a magnetic security feature of the document, wherein the first magnet assembly has at least one first magnet providing a first magnetic field and the second magnet assembly has at least one second magnet providing a second magnetic field, wherein the first magnet has a first lateral surface facing the second magnet assembly and defining a gap space, and the second magnet has a second lateral surface facing the first magnet assembly and defining a gap space, wherein the sensor assembly is arranged in the gap space. The correction magnet assembly is arranged on a side of the sensor assembly facing away from the detection zone, wherein the correction magnet assembly is arranged in the gap space and is inclined with respect to the first lateral surface and/or the second lateral surface, and has at least one correction magnet providing a third magnetic field, wherein the first to third magnetic fields interact to form a total magnetic field, and the total magnetic field penetrates the sensor assembly in a predetermined orientation.
An advantage of this arrangement is that a particularly advantageously designed/oriented and strong total magnetic field can be provided at the sensor assembly of the sensor device. As a result, the total magnetic field at the sensor assembly has a particularly high quality, with the result that disturbances at the sensor device due to incorrect orientation of the total magnetic field can be avoided when the magnetic security feature of the document is sensed.
In another embodiment, the total magnetic field penetrates the sensor assembly substantially perpendicular to the main direction of the extent of the sensor assembly. The main direction of the range may run on the sensor upper side or the total magnetic field penetrates the sensor upper side substantially vertically. As a result, the sensor device can at least particularly reliably sense at least the magnetic security feature of the document, in particular as a certificate of value security in a payment transaction, for example.
In another embodiment, the corrective magnet assembly is disposed a distance from the first magnet assembly and the second magnet assembly. The correction magnet has a correction magnet upper side and a correction magnet lower side. The correction magnet upper side and/or the correction magnet lower side are arranged obliquely, preferably perpendicularly, with respect to the first lateral surface and/or the second lateral surface. The third magnetic field preferably leaves substantially via the upper side of the correction magnet and enters substantially via the lower side of the correction magnet.
In another embodiment, the correction magnet assembly has a third lateral surface facing the first lateral surface and a fourth lateral surface facing the second lateral surface of the second magnet. The sensor assembly has a sensor upper side facing the detection zone. The correction magnet assembly has an assembly upper side arranged facing the sensor assembly. The assembly upper side is arranged parallel to the sensor upper side.
In a further embodiment, the first and second lateral surfaces are oriented parallel to each other or at an inclination of less than 5 °, in particular less than 2 °, particularly advantageously less than 1 °. The third and fourth lateral surfaces are oriented parallel to each other and advantageously parallel to the first and/or second lateral surfaces.
In another embodiment, the correction magnet assembly is arranged in a central position between the first lateral surface and the second lateral surface.
In another embodiment, the correction magnet is designed in a block shape. The correction magnet assembly has a first correction conductive element and a second correction conductive element. The first correction conductive element and the second correction conductive element are each designed in a plate shape. The first correction conductive element is disposed on the upper side of the correction magnet, and the second correction conductive element is disposed on the lower side of the correction magnet. Wherein the first corrective conductive element is designed to guide the third magnetic field at least partially between the assembly upper side and the corrective magnet upper side, and the second corrective conductive element is designed to guide the third magnetic field at least partially between the assembly lower side and the corrective magnet lower side.
In another embodiment, the correction magnet assembly has several correction magnets arranged in a row. The correction magnets are abutted against each other with their end faces. The first corrective conductive element extends over and is connected to the corrective magnet upper side of the corrective magnet by a material bond. The second correction conductive element extends on the correction magnet underside of the correction magnet and is connected to the correction magnet underside by a material bond. The first correction conductive element and the second correction conductive element connect the correction magnets to each other.
In a further embodiment, the sensor device has a housing with a housing cover, wherein the housing cover is arranged on a side of the sensor assembly facing away from the correction magnet assembly. The housing cover at least partially defines a housing interior and has a cover interior side on a side facing the housing interior. The first magnet assembly has a first magnet upper side on a side facing the inside of the cover. The upper side of the first magnet abuts against the inner side of the cover. Additionally or alternatively, the second magnet assembly has a second magnet upper side on a side facing the inside of the cover. The second magnet upper side abuts against the cover inner side.
In a further embodiment the sensor upper side is arranged at a predetermined distance from the cover inner side, preferably a distance of 20 μm to 250, in particular a distance of 50 μm to 130 μm.
In another embodiment, the housing cover has a first housing section and at least one second housing section. The first housing section and the second housing section are each plate-shaped and are connected to one another at a first connection point. The second housing section is arranged obliquely with respect to the first housing section. The first magnet assembly abuts the first housing section near the first connection location. The housing cover can be made of sheet metal or can be designed in the form of a groove by die casting (for example zinc die casting), so that the first housing section and the second housing section are designed in a monolithic and materially uniform manner. The housing interior may be potted with a potting compound such as synthetic resin so that the components disposed in the housing interior do not move relative to one another at all. Such a movement will generate an error signal in the sensor device or in the conductive track of the sensor device by induction. As a result, microphonics (microphonic effect) can be avoided and the vibration sensitivity of the system can be reduced.
In another embodiment, the housing cover has a third housing section. The third housing section is plate-shaped and is connected to the first housing section by a second connection location opposite the first connection location. The third housing section is arranged obliquely with respect to the first housing section. The first magnet assembly, the second magnet assembly, the sensor assembly and the corrective magnet assembly are disposed between the second housing section and the third housing section. The second magnet assembly abuts the first housing section near the second connection location.
In another embodiment, the housing has at least one first housing part extending in the longitudinal direction and one second housing part connected to the first housing part in the transverse direction.
The first housing part and the second housing part together define a socket on the side facing the housing cover. The socket is closed laterally by the housing part and is designed to be open on the side facing the housing cover. The calibration magnet assembly and the sensor assembly are disposed in the receptacle.
In another embodiment, the first magnet assembly has a longitudinal extent and the correction magnet assembly has a further longitudinal extent in the longitudinal direction, wherein the longitudinal extent and the further longitudinal extent are different.
In another embodiment, the first magnet assembly has a first end face, the second magnet assembly has a second end face and the correction magnet assembly has a third end face.
The first and second end surfaces are disposed in a common plane. The third end face is arranged at a distance from the plane on the side of the plane facing the sensor assembly.
It has been realized that an improved system may be provided by a system having a sensor arrangement and a control device as described above. The control device is connected to the sensor arrangement. The sensor device is designed to provide a sensor signal in accordance with a magnetic security feature of the document, which security feature may be arranged on the upper side of the housing. The control device is designed to sense and further process the sensor signal. For this purpose, the sensor signal can be guided through a band-pass filter, for example, which is preamplified, filtered. The external interference field may also be removed from the sensor signal or the noise signal portion may be removed from the sensor signal. Also, the sensitivity difference of the respective sensors may be compensated for and/or an analog/digital conversion program may be performed by the control device. The control device may send the (further processed) sensor signal to a standard interface.
Drawings
The invention will be explained in more detail below with reference to the drawings. In the drawings:
FIG. 1 shows a perspective view of a system;
FIG. 2 shows a perspective cut-away view through the sensor device shown in FIG. 1 of the system along section A-A shown in FIG. 1;
FIG. 3 shows a section through the housing cover of the sensor device along the section A-A shown in FIG. 1;
FIG. 4 shows a perspective view of a cross-section through the sensor device along section A-A shown in FIG. 1;
FIG. 5 shows a cross-section through the sensor device along section A-A shown in FIG. 1;
FIG. 6 illustrates a plan view of the first magnet assembly, the second magnet assembly, and the correction magnet assembly of the sensor device illustrated in FIGS. 1-5;
FIG. 7 shows a perspective view of a cut-away of a first housing portion and a second housing portion of the sensor device;
FIG. 8 shows a cut through a section of the sensor device along section A-A shown in FIG. 1; and
fig. 9 shows a cross-section through the sensor device shown in fig. 1 along the section A-A shown in fig. 1 and shows the magnetic field lines.
Detailed Description
For ease of understanding, the following figures refer to a coordinate system. The coordinate system has an x-axis (longitudinal direction), a y-axis (vertical direction) and a z-axis (transverse direction, conveying direction) and is designed by way of example as a right-hand system.
Fig. 1 shows a perspective view of a system 10.
The system 10 has a sensor arrangement 15, a control device 20 and an adapter 21. The control device 20 is electrically connected to the contact means 30 of the adapter 21 by a first electrical connection 25. The adapter 21 is connected to the sensor device 15 by a second electrical and mechanical connection, which is obscured in fig. 1. The adapter 21 is arranged on the underside of the sensor device 15. In addition, the adapter 21 may have holding means 26 arranged laterally on both sides in the longitudinal direction.
The system 10 may have further components, in particular components for feeding a document 31 with a security feature into a detection zone 35 (indicated by a dashed line in fig. 1) of the sensor device 15, and components for attaching the sensor device 15 by means of the holding device 26.
Located in the detection zone 35 is a transport plane 40 (shown by dashed lines in fig. 1) in which the document 31 is guided past the sensor device 15. The transport plane 40 is designed as an xz plane, for example, the document 31 is transported in the z direction in the transport plane 40. The transport plane 40 is arranged at a distance from a housing upper side 45 of a housing 50 of the sensor device 15. The minimum distance of the transport plane 40 from the housing upper side 45 in the y-direction is, for example, 0.1mm to 1mm.
Fig. 2 shows a perspective sectional view through the sensor device 15 shown in fig. 1 along the section A-A shown in fig. 1.
The housing 50 has a first housing portion 55, a second housing portion 60, and a housing cover 65. The housing cover 65 is arranged on the upper side of the first housing part 55 and the second housing part 60. The first housing portion 55 and the second housing portion 60 are opposite to each other in the transverse direction (z-direction). The housing 50 defines a housing interior 70. In the longitudinal direction, the first housing part 55, the second housing part 60 and the housing cover 65 are designed to be as long as possible. In this case, the longitudinal direction is substantially the main range direction of the first housing portion 55, the second housing portion 60 and the housing cover 65.
Within the housing interior 70, the sensor device 15 has a first magnet assembly 75, a second magnet assembly 80, a sensor assembly 85, an evaluation unit 90 and a calibration magnet assembly 95.
The first magnet assembly 75 is arranged in an upper region of the first housing part 55 and protrudes partly beyond the first housing part 55 in the y-direction. To attach the first magnet assembly 75, the first housing portion 55 has first and second retaining fingers 100, 105 extending upwardly in the y-direction and alternately arranged offset relative to each other in two rows in the x-direction and the z-direction. The first and second retaining fingers 100, 105 preferably attach the first magnet assembly 75 in all three spatial directions. (the first and second retaining fingers 100, 105 will be discussed in detail in FIG. 7).
The second magnet assembly 80 is arranged at a distance from the first magnet assembly 75 in the lateral direction. The second magnet assembly 80 is arranged in an upper region of the second housing part 60 and preferably protrudes partially beyond the second housing part 60 in the y-direction. To attach the second magnet assembly 80, the second housing part 60 has third and fourth holding fingers 370, 375 extending upwardly in the y-direction and alternately arranged offset relative to each other in two rows in the x-direction and the z-direction. The third and fourth retaining fingers 370, 375 (the third and fourth retaining fingers 370, 375 will be discussed in detail in fig. 7) attach the second magnet assembly 80 preferably in all three spatial directions.
Between the first holding finger 100 and the second holding finger 105, the first housing part 55 has a first bearing surface 110, on which first bearing surface 110 the first magnet assembly 75 is arranged on the underside. In this case, on its underside, the first magnet assembly 75 can also have a first support element 111 for tolerance compensation, with which the first magnet assembly 75 is supported on the first support surface 110. The first support surface 110 extends in the xz plane.
The second housing portion 60 has a second bearing surface 115 on its upper side between the third and fourth retaining fingers 370, 375. The second support surface 115 and the first support surface 110 are preferably arranged in a common xz-plane. The second bearing surface 115 is disposed between the third and fourth retaining fingers 370, 375. On the underside, the second magnet assembly 80 is supported on a second support surface 115. The second magnet assembly 80 may also have a second support element 112 on its underside to provide tolerance compensation.
The first and second support elements 111, 112 are for example designed as (hollow) cylinders and elastic.
The sensor assembly 85 and the correction magnet assembly 95 are arranged in the first gap space 120 in the lateral direction between the first magnet assembly 75 and the second magnet assembly 80. The correction magnet assembly 95 is disposed on the underside of the sensor assembly 85.
Below the first and second magnet assemblies 75, 80, the evaluation unit 90 is arranged in the second gap space 125. The second gap space 125 is delimited in the transverse direction by the two housing parts 55, 60. The evaluation unit 90 is electrically connected to the sensor assembly 85 by a third connection (obscured in fig. 2) which is guided laterally through the correction magnet assembly 95 between the second housing part 60 and the correction magnet assembly 95. On the underside, the evaluation unit 90 is connected to the adapter 21 by a second connection.
The housing cover 65 has the same cross section over substantially the entire longitudinal extent. However, the housing cover 65 may additionally have individual recesses 130 arranged offset relative to each other in the longitudinal direction, said recesses 130 extending substantially in the longitudinal direction. The recess 130 may also be omitted.
Fig. 3 shows a section through the housing cover 65 along the section A-A shown in fig. 1.
The housing cover 65 has a first housing side wall 135 and a second housing side wall 140 arranged opposite the first housing side wall 135 in the lateral direction. The first housing sidewall 135 and the second housing sidewall 140 run parallel to each other in the xz-plane, respectively arranged offset from each other in the lateral direction. Further, for example, the housing cover 65 has a first housing section 145, a second housing section 150 and a third housing section 155.
The housing cover 65 may be made of sheet metal, for example, by stamping and bending methods. In this case, the first and second housing side walls 135 and 140 are each designed in a plate shape. The first to third housing sections 145, 150, 155 are likewise designed in the form of a plate.
The first, second and third housing sections 145, 150 and 155 are arranged on the upper side with respect to the first and second housing side walls 135 and 140. The first housing section 145 is arranged immediately below the detection zone 35. In this case, for example, in this embodiment, the first housing section 145 extends substantially in the xz plane. As a result, the first housing section 145 is disposed perpendicular to the first and/or second housing side walls 135, 140.
The second housing section 150 is arranged between the first housing section 145 and the first housing side wall 135 in the transverse direction and connects the first housing side wall 135 to the first housing section 145. In this case, the first housing section 145 is connected to the second housing section 150 at a first connection location 160. In this case, the first connection point 160 may be designed as a bending point of the original sheet metal material.
The second housing section 150 is inclined relative to the first housing section 145, preferably at an obtuse angle. The second housing section 150 is likewise arranged obliquely with respect to the first housing side wall 135. On the underside, at least one latching means 165 may be arranged at the first housing side wall 135 and/or the second housing side wall 140, the latching means 165 being designed, for example, as latching lugs and, in the assembled state, engaging latching receptacles of the housing parts 55, 60, which are designed in a manner corresponding to the latching means, in order to connect the housing cover 65 to the housing parts 55, 60.
Opposite the second housing section 150 in the transverse direction, the third housing section 155 is connected to the first housing section 145 by a second connection location 170. The third housing section 155 connects the first housing section 145 to the second housing sidewall 140 and is arranged between the first housing section 145 and the second housing sidewall 140 in the transverse direction. The third housing section 155 is arranged obliquely with respect to the first housing section 145, preferably at the same angle as the second housing section 150. The third housing section 155 is likewise arranged obliquely with respect to the second housing side wall 140. Furthermore, the first housing section 145 is oriented perpendicular to the first housing side wall 135 and the second housing side wall 140.
Inside the first housing section 145, the housing cover 65 has a cover inner side 175. In this embodiment, for example, the cover inner side 175 is designed planar and extends in the xz plane. In the transverse direction, the cover inner side 175 is delimited on one side by the second housing section 150 and on the opposite side from the second housing section 150 by the third housing section 155. In this case, the cover inner side 175 extends substantially in the entire longitudinal direction of the housing cover 65. In this case, the cover inner side 175 runs parallel to the detection zone 35 and the transport plane 40.
The first housing sidewall 135, the second housing sidewall 140 and the first to third housing sections 145, 150, 155 are preferably manufactured from a micro-magnetic and/or non-magnetic substance in a monolithic and material-consistent manner, such as a plastic, a copper substance, in particular a copper alloy, in particular beryllium copper.
Outside the first housing section 145, the housing cover 65 has a housing upper side 45. In this embodiment, the housing upper side 45 is, for example, planar in design and runs in an xz plane, which is arranged offset in the y direction relative to the cover inner side 175. The detection zone 35 is adjacent to the housing upper side 45 from above. In this case, the housing upper side 45 is arranged parallel to the conveying plane 40.
Fig. 4 shows a perspective view of a cross-section along section A-A shown in fig. 1, depicting only the first magnet assembly 75, the second magnet assembly 80, the sensor assembly 85, and the calibration magnet assembly 95 for clarity.
As explained above, the sensor assembly 85 and the corrective magnet assembly 95 are disposed entirely within the first interstitial space 120. In this case, the sensor assembly 85 and the correction magnet assembly 95 are smaller in extent than the first magnet assembly 75 and/or the second magnet assembly 80 in the y-direction.
In this embodiment, the first magnet assembly 75 and the second magnet assembly 80 are substantially identically designed, such that the explanation of the first magnet assembly 75 hereinafter applies equally to the second magnet assembly 80. The first magnet assembly 75, the second magnet assembly 80, and the correction magnet assembly 95 each extend parallel to the x-axis in the longitudinal direction, and are thus arranged parallel to each other. In this case, the first and second magnet assemblies are vertically arranged.
The first magnet assembly 75 has at least one first magnet 176. The first magnet assembly 75 preferably has a number of first magnets 176 arranged in a first row 180. The number of first magnets 176 is substantially unlimited and is substantially only determined by the maximum longitudinal extent of the detection zone 35. The first row 180 runs parallel to the x-axis. The first magnet 176 is designed in a block shape. Of course, it is also conceivable to provide the first magnet 176 with a different design. In particular, it is also conceivable here for the first magnet 176 to be designed to be curved.
The first magnet 176 provides a first magnetic field 390 (shown in fig. 9). The first magnet 176 has a first magnet north pole N 1 And a first magnet south pole S 1 Pole N of first magnet 176 on first magnet assembly 75 1 ，S 1 Is identical. In this embodiment, the first magnet has a south pole S 1 For example, arranged to point outwardly towards the side facing away from the second magnet assembly 80. First magnet north pole N of first magnet 176 1 On the side facing the second magnet assembly 80. Of course, pole S 1 ，N 1 May also be inverted so that the first magnet has a south pole S 1 On the side facing the second magnet assembly 80. In this case, the first magnet has a north pole N 1 On the side facing away from the first magnet assembly 75.
The first magnet 176 has a first cross-sectional area with respect to the yz profile, which is kept substantially constant in the longitudinal direction. The first magnet 176 is contacted by its end face, for example. Each first magnet 176 has a first lateral surface 185 on a side facing the second magnet assembly 80. The first transverse surface 185 is designed planar, the first transverse surface 185 of the first magnet 176 being arranged substantially at the same level. The first transverse surface 185 is arranged perpendicular to the cover inner side 175 and the conveying plane 40.
For example, the second magnet assembly 80 is designed to be mirror symmetrical with respect to the symmetry plane 190. The symmetry plane 190 is designed as xy-plane and extends in a central position between the first magnet assembly 75 and the second magnet assembly 80. A symmetrical arrangement of the first magnet assembly 75 relative to the second magnet assembly 80 is also contemplated.
The second magnet assembly 80 has at least one second magnet 195. The second magnet assembly 80 preferably has a number of second magnets 195 arranged in a second row 200. The second magnets 195 are designed in a block shape, for example, the second magnets 195 are designed to be identical to each other in this embodiment. The second magnet 195 is in direct contact through its end face. The second magnet 195 has a substantially constant cross-sectional area in the longitudinal direction, the cross-sectional area of the second magnet 195 being substantially the same as the cross-sectional area of the first magnet 176. The second magnet 195 has a second lateral surface 205. The second lateral surface 205 is arranged on the side facing the first magnet assembly 75. The second lateral surface 205 extends in the xy-plane and is oriented parallel to the first lateral surface 185.
Alternatively, the first and second lateral surfaces 185, 205 may be arranged obliquely with respect to each other at an angle of 5 °, preferably 2 °, particularly advantageously preferably 1 °. In this case, the first and second lateral surfaces 185, 205 are oriented relative to one another such that as the distance from the correction magnet assembly 95 increases, the distance between the first and second lateral surfaces 185, 205 decreases or increases.
The second magnet 195 provides a second magnetic field 395 (shown in fig. 9). In addition, the second magnet 195 has a second magnetic north pole N 2 And a second magnet south pole S 2 The second magnet is arranged on the side facing away from the first magnet assembly 75, and the north pole N of the second magnet 2 Disposed on a side facing the first magnet assembly 75.
The corrective magnet assembly 95 is designed similarly to the first magnet assembly 75. The correction magnet assembly 95 has at least one correction magnet 210, preferably several correction magnets 210, the correction magnets 210 being designed in a block-like manner. In this case, the range in the lateral direction (z direction) is larger than the range in the vertical direction. Furthermore, the extent in the longitudinal direction is greater than the extent in the vertical direction and/or in the transverse direction. The correction magnet 210 has a third lateral surface 215 and a fourth lateral surface 220. The third lateral surface 215 is arranged on the side facing the first magnet assembly 75. In this case, the third lateral surface 215 is arranged at a distance from the first magnet assembly 75 and is oriented parallel to the first lateral surface 185 travelling in the xz-plane.
The fourth transverse surface 220 is arranged at a side facing the second magnet assembly 80 and at a distance from the second magnet assembly 80. The fourth lateral surface 220 runs parallel to the second lateral surface 205. For yz profile, correction magnets 210 have substantially the same cross-sectional area relative to each other. For example, the correction magnet assembly 95 is disposed in a central position between the first lateral surface 185 and the second lateral surface 205. The correction magnet assembly 95 has an assembly upper side 225 facing the sensor assembly 85 and an assembly lower side 230 disposed on a side facing away from the sensor assembly 85.
The component upper side 225 and the component lower side 230 are each designed planar and each extend in an xz plane arranged offset in the y-direction. In this case, for example, the assembly upper side 225 abuts against the underside of the sensor assembly 85.
The corrective magnet assembly 95 has a first corrective conductive element 235 and a second corrective conductive element 240. In this embodiment, the first correction conductive element 235 and the second correction conductive element 240 are each designed to be identical to each other. The first and second correcting conductive elements 235, 240 are designed in the form of plates and have ferromagnetic substances, in particular carbon steel.
The correction magnet 210 has a correction magnet upper side 245 and a correction magnet lower side 250, the correction magnet upper side 245 and the correction magnet lower side 250 connecting the third lateral surface 215 to the fourth lateral surface 220. For example, the correction magnet upper side 245 is arranged obliquely perpendicular to the first lateral surface 185 and/or the second lateral surface 205. The correction magnet upper side 245 runs parallel to the correction magnet lower side 250. The correction magnet upper side 245 is connected to the first correction conductive element 235 by a material bond. The second corrective conductive element 240 is attached to the corrective magnet underside 250 by material bonding.
The longitudinal extent of the corrective conductive elements 235, 240 is greater than the corrective magnet 210. The first corrective conductive element 235 preferably extends on the corrective magnet upper side 245 and the second corrective conductive element 240 extends on the corrective magnet lower side 250 of the corrective magnet 210. The longitudinal extent of the correction conductive elements 235, 240 is the same as the sum of all longitudinal extents of all correction magnets 210, such that the first correction conductive element 235 and the second correction conductive element 240 sandwich the correction magnets 210 and connect them to each other. As a result, the correction magnet assembly 95 is designed to be particularly stable and resistant to bending. In addition, several correction magnets 210 can be connected to each other in a simple manner. As a result, the correction magnet 210 is designed in a rod shape and is easy to operate.
The correction magnets 210 abut each other through their end faces. In the transverse direction, the correction conductive elements 235, 240 and the correction magnet 210 have the same transverse extent, so that the fully assembled correction magnet assembly 95 is designed in block form and ends in the transverse direction at the third and fourth transverse surfaces 215, 220. The correction conductive elements 235, 240 are preferably designed to be thinner (in the y-direction) than the correction magnet 210.
The correction magnet 210 provides a third magnetic field 400 (shown in fig. 9). In this case, the correction magnet 210 is magnetized such that the third magnetic north pole N 3 Arranged at the correction magnet upper side 245 and a third magnetic south pole S 3 Disposed at the correction magnet underside 250. As a result, the third magnetic field leaves the correction magnet 210 mainly at the correction magnet upper side 245 and at the correction magnet lower side 2The correction magnet 210 is again entered at 50.
The magnetization of the correction magnet 210 has technically induced tolerances, so that, inside the correction magnet 210, in a disadvantageous situation, the third magnetic field 400 runs obliquely rather than vertically with respect to the correction magnet upper side 245 and/or the correction magnet lower side 250. The corrective conductive elements 235, 240 are designed to conduct and orient the third magnetic field 400. In this case, the first corrective conductive element 235 conducts the third magnetic field 400, for example, between the corrective magnet upper side 245 and the assembly upper side 225, at which assembly upper side 225 the third magnetic field 400 exits partially perpendicularly from the corrective magnet assembly 95. Likewise, the second corrective conductive element 240 conducts and orients the third magnetic field 400 between the corrective magnet underside 250 and the assembly underside 230.
The first magnet assembly 75 also has a first conductive element 255 and a second conductive element 260. For example, the first conductive element 255 is disposed at the first lateral surface 185 and is advantageously connected to the first lateral surface 185 by a material bond. The second conductive element 260 is arranged at a fifth transverse surface 265 facing the first transverse surface 185 and at a side of the first magnet 176 facing away from the second magnet assembly 80. The fifth transverse surface 265 is designed flat and extends in the xy-plane. In this case, the fifth transverse surface 265 is oriented parallel to the first transverse surface 185. Advantageously, at the fifth lateral surface 265, the second conductive element 260 is connected to the fifth lateral surface 265 by a material bond.
In this embodiment, the first and second conductive elements 255, 260 are, for example, designed in a plate shape, and the extent in the lateral direction (z-direction) is smaller than that of the first magnet 176. In this embodiment, the extent of the first conductive element 255 is the same as the extent of the second conductive element 260 in the lateral direction. Furthermore, it is also conceivable that the second conductive element 260 is designed to be thinner than the first conductive element 255 in the lateral direction, for example. In this embodiment, for example, the first and second conductive elements 255, 260 are significantly thinner (3 to 5 times in this embodiment) than the extent of the first magnet 176 in the lateral direction. On the underside, the first conductive element 255, the second conductive element 260 and the first magnet 176 terminate at a first magnet underside 270, the first magnet underside 270 being designed flat and extending in the xz plane. On the upper side, for example, the first conductive element 255, the second conductive element 260 and the first magnet 176 terminate at a first magnet upper side 275, the first magnet upper side 275 being designed flat and extending in the xz plane. Likewise, the first magnet upper side 275 and the first magnet lower side 270 are oriented parallel to each other.
In the longitudinal direction, the first conductive element 255 and the second conductive element 260 are designed to be wider than the first magnet 176. Preferably, the first and second conductive elements 255, 260 extend over the entire longitudinal extent of the first magnet assembly 75. As a result, a particularly strong first magnet assembly 75 is provided, which is designed as a rod. Particularly low, a number of first magnets 176 may be connected to each other by first conductive elements 255 and second conductive elements 260. Advantageously, the first conductive element 255 and/or the second conductive element 260 have a ferro-silicon alloy.
The first magnetic field 390 provided by the first magnet 176 exits primarily laterally at the first lateral surface 185 and reenters the first magnet 176 via the fifth lateral surface 265. The first and second conductive elements 255, 260 are configured to conduct and orient a first magnetic field 390.
The second magnet assembly 80 has a third conductive element 280, which is designed as a plate, and a fourth conductive element 285, which is designed as a plate. The third conductive element 280 is arranged at the second lateral surface 205 and is connected to the second lateral surface 205, preferably by material bonding.
The fourth conductive element 285 is disposed at the sixth transverse surface 290 of the second magnet 195. For example, the sixth lateral surface 290 is designed flat and extends in the xy-plane. In this case, the sixth transverse surface 290 is oriented on the side of the second magnet facing away from the first magnet assembly 75, parallel to the second transverse surface 205 and also parallel to the first transverse surface 185. The third 280 and fourth 285 conductive elements have the same longitudinal extent and extend over the entire longitudinal extent of the second row 200 of second magnets 195. In this case, the fifth and sixth lateral surfaces 265 and 290 are arranged in xy planes respectively arranged offset in the lateral direction. The fourth conductive element 285 is connected to the second magnet 195 at a sixth transverse surface 290 by a material bond. In addition, the third and fourth conductive elements 280, 285 may have carbon steel as a substance.
In this embodiment, the second magnets 195 abut each other by their end faces and are connected to each other via third and fourth conductive elements 280, 285. As a result, the second magnet assembly 80 can be designed in a rod-like shape and is particularly easy to handle. Furthermore, the second magnet assembly 80 is thus particularly robust.
The third conductive element 280, the second magnet 195 and the fourth conductive element 285 together terminate at the upper side in a second magnet upper side 295. The second magnet upper side 295 is disposed substantially in a common (xz) plane with the first magnet upper side 275. On the underside, the third conductive element 280, the fourth conductive element 285, and the second row 200 of second magnets 195 terminate at the second magnet underside 300. For example, the second magnet underside 300 is designed flat and extends in the xz plane. In this embodiment, the first magnet underside 270 and the second magnet underside 300 are arranged in a common (xz) plane. The second magnet upper side 295 and the second magnet lower side 300 are oriented parallel to each other.
The second magnetic field 395 provided by the second magnet 195 exits primarily laterally at the second lateral surface 205 and reenters the second magnet 195 via the sixth lateral surface 290. The third and fourth conductive elements 280, 285 are designed to conduct and orient the second magnetic field 395.
The sensor assembly 85 has a plurality of sensors 301, for example, sensors 301 arranged in a third row 305, running parallel to the first and second rows 180, 200.
Fig. 5 shows a section through the sensor device 15 along the section A-A shown in fig. 1, only a part of the components being shown in fig. 5 for the sake of clarity.
On the underside, the sensor 301 may be attached to a printed circuit board 310. On the underside of the printed circuit board 310, on the side facing the correction magnet assembly 95, the sensor assembly 85 may have sensor magnets 315, the sensor magnets 315 being arranged at a distance from each other. Each sensor magnet 315 has a sensor magnet underside 320, e.g., the assembly upper side 225 abuts the sensor magnet underside 320. The sensor magnet undersides 320 are all commonly arranged in a common xz plane. Alternatively, it is contemplated that a gap is disposed between the sensor magnet underside 320 and the assembly upper side 225.
The third lateral surface 215 is arranged at a distance from the first magnet assembly 75 and the fourth lateral surface 220 is arranged at a distance from the second magnet assembly 80.
In the transverse direction, the first magnet assembly 75, the second magnet assembly 80, the evaluation unit 90, the sensor assembly 85 and the correction magnet assembly 95 are arranged between the second housing section 150 and the third housing section 155, directly underneath the first housing section 145.
In this case, the first magnet assembly 75 is arranged such that, on the upper side, the first magnet assembly 75 abuts with a first magnet upper side 275 against the cover inner side 175. In the transverse direction, the first magnet assembly 75 is arranged directly adjacent to the first connection location 160. The advantage of this arrangement is that the detection zone 35 is particularly wide in the lateral direction. In addition, the first magnet assembly 75 is guided transversely through the recess 130, so that the first magnet assembly 75 is disposed particularly high in the housing interior 70. As a result, the distance between the transport plane 40 and the first magnet assembly 75 is particularly small.
The second magnet assembly 80 is seated with the second magnet upper side 295 internally against the cover inner side 175 of the first housing section 145. In this case, in the transverse direction, the second magnet assembly 80 is arranged in the direction of the third housing section 155 such that the second magnet assembly 80 is arranged directly adjacent to the second connection location 170.
The second magnet assembly 80 is also guided transversely through the recess 130 (which is optionally arranged in the third housing section 155), so that the second magnet assembly 80 is arranged particularly high in the housing interior 70. The two magnet assemblies 75, 80 are preferably arranged at the same level in the housing interior 70.
As a result, the first magnet assembly 75 has a particularly large distance in the transverse direction from the second magnet assembly 80, so that the first gap space 120 is designed to be particularly wide in the transverse direction and the detection zone 35 is particularly wide in the transverse direction.
Each sensor 301 has a sensor upper side 325. The sensor upper side 325 faces the detection zone 35 and the first housing section 145. The sensor upper sides 325 of the sensors 301 are arranged jointly in a common xz-plane. The assembly upper side 225 and the sensor upper side 325 are oriented parallel to each other.
The sensor upper side 325 is a predetermined first distance a from the cover inner side 175 1 . First predetermined distance a 1 The value of (2) is in the range of 20 μm to 250 μm, in particular a first distance a of 50 μm to 130 μm 1 It is particularly advantageous if the first distance a is 50 μm to 100 μm from the inner side 175 of the cover 1 。
In the transverse direction, the first magnet assembly 75 is a second distance a from the second magnet assembly 80 2 . Second distance a 2 Is approximately equal to twice the maximum lateral distance of the correction magnet assembly 95.
As an alternative to the arrangement shown in fig. 5, it is also conceivable that the first magnet upper side 275 is arranged at a distance from the cover inner side 175. Additionally or alternatively, it is also conceivable that the second magnet upper side 295 of the second magnet assembly 80 is arranged at a distance from the cover inner side 175. The sensor upper side 325 may also abut the cover inner side 175.
It is also contemplated that the calibration magnet assembly 95 is disposed a distance from the sensor assembly 85, and in particular, through the assembly upper side 225 a distance from the sensor magnet lower side 320. The corrective magnet assembly 95 may also be asymmetrically arranged, i.e. at a distance from one of the two magnet assemblies 75, 80 that is smaller than the distance from the other magnet assembly 75, 80. The corrective magnet assembly 95 may also be disposed obliquely relative to the first magnet assembly 75 and/or the second magnet assembly 80. An oblique orientation relative to the sensor 301 is also contemplated, rather than the parallel orientation shown in fig. 5.
Fig. 6 shows a plan view of the first magnet assembly 75, the second magnet assembly 80 and the correction magnet assembly 95 of the sensor device 15 shown in fig. 1 to 5.
The first magnet assembly 75 has a first end face 330 and the second magnet assembly 80 has a second end face 335. The second end surface 335 is disposed at an end of the second magnet assembly 80 facing the first end surface 330. The correction magnet assembly 95 also has a third end face 340. The end faces 330, 335, 340 are each arranged in the yz plane. In this case, the first end face 330 and the second end face 335 are arranged in a common plane 345. By the arrangement of the correction magnet assembly 95 shortened with respect to the first and second magnet assemblies, the third end face 340 is arranged from the plane 345 toward the inside in the longitudinal direction.
In contrast, at the left end as shown in fig. 6, the configuration of the correction magnet assembly 95 and the first and second magnet assemblies 75, 80 is the same as at the right end.
An advantage of this configuration is that at the end face end in the first gap space 120 there is enough mounting space between the first and second magnet assemblies 75, 80 for the housing 50 to position and attach the correction magnet assembly 95 in the x-direction.
Fig. 7 shows a cut-away perspective view of the first housing portion 55 and the second housing portion 60.
The first holding finger 100 and the second holding finger 105 are designed differently from each other. In this case, the second holding finger 105 is arranged on the side facing the second housing part 60, while on the other hand the first holding finger 100 is arranged on the side facing away from the second housing part 60. The first and second holding fingers 100, 105 extend parallel in the vertical direction and are arranged offset from each other in two rows in the longitudinal direction. Internally, the second retention finger 105 has a first subsection 355 for defining the receiving profile of the socket 360. At the free end of the second holding finger 105, the second holding finger 105 may have a first latching tab 365 extending in the direction of the second housing part 60.
The second housing part 60 has two rows of third and fourth holding fingers 370, 375, the fourth holding finger 375 being designed mirror-symmetrically with respect to the first holding finger 100, but being arranged offset with respect to the first holding finger 100 in the longitudinal direction. The third holding finger 370 is designed mirror-symmetrically with respect to the symmetry plane 190, which symmetry plane 190 is arranged centrally with respect to the second holding finger 105 between the second and third holding fingers 105, 370. The third retaining finger 370 has a second subsection 380 of the receiving profile of the receptacle 360. The second subsection 380 of the receiving profile is arranged on the side of the third holding finger 370 facing the second holding finger 105. The first subsection 355 forms a socket 360 together with the second subsection 380, albeit offset in the longitudinal direction.
At the free end of the third holding finger 370, the third holding finger 370 has a second latching lug 385, the second latching lug 385 extending in the direction of the first housing part 55.
Fig. 8 shows a section through the sensor device along the section A-A shown in fig. 1.
The sensor assembly 85 and the calibration magnet assembly 95 are disposed in the socket 360 with the calibration magnet assembly 95 resting against the bottom 389 of the socket 360 at the underside with the assembly underside 230. The bottom 389 is designed flat. The retaining rib 388 may laterally abut the bottom 389, the retaining rib 388 tapering the receptacle 360 in a lateral direction and attaching the corrective magnet assembly 95 in the z-direction. In this case, the socket 360 is delimited by a first and a second subsection 355, 380 of the receiving profile, the subsections 355, 380 being arranged offset from one another in the longitudinal direction.
For example, the first latch tab 365 and the second latch tab 385 are arranged at the same level in the y-direction. In this case, the first latching lugs 365 and the second latching lugs 385 are engaged on the upper side around the printed circuit board 310 of the sensor assembly 85. The sensor 301 is arranged at approximately the same level as the latching lugs 365, 385. In this case, the sensor 301 is arranged between the first latching lug 365 and the second latching lug 385 in the transverse direction. A gap may be disposed on both sides between the sensor 301 and the first and second latching lugs 365, 385, respectively.
An advantage of this arrangement is that when the sensor device 15 is installed in the receptacle 360, the correction magnet assembly 95 and then the sensor assembly 85 can be inserted first, and the first and second latching lugs 365, 385 then latched thereon and the sensor assembly 85 and correction magnet assembly 95 attached. Then, the first magnet assembly 75 is inserted between the first and second holding fingers 100, 105 on the side facing away from the correction magnet assembly 95, and the second magnet assembly 80 is inserted between the third and fourth holding fingers 370, 375. As a result, bending of the second and/or third retention fingers 105, 370 may be prevented, thereby preventing widening of the receptacle 360 to remove the sensor assembly 85 and/or the correction magnet assembly 95.
Fig. 9 shows a section through the sensor device 15 shown in fig. 1 along the section A-A shown in fig. 1. Furthermore, in fig. 9 the first magnetic field 390, the second magnetic field 395, the third magnetic field 400 and the total magnetic field 405 generated by the first to third magnetic fields 390, 395, 400 are depicted by means of magnetic field lines.
In the first magnet 176, a first magnetic field 390 is generated from the first magnet north pole N 1 To the south pole S of the first magnet 1 Substantially perpendicular to the first 185 and fifth 265 lateral surfaces. The first magnetic field 390 exits the first magnet 176 at the first lateral surface 185 and enters the first conductive element 255. The first conductive element 255 bends a portion of the first magnetic field 390 upward at about 90 degrees in the direction of the housing cover 65 and directs at least a portion of the first magnetic field 390 to the first magnet upper side 275. Another portion of the first magnetic field 390 laterally exits from the first conductive element 255 on a side facing the corrective magnet assembly 95. The first magnetic field 390 re-routed through the first conductive element 255 exits the first conductive element 255 at the first magnet upper side 275. The first magnetic field 390 penetrates the housing cover 65 and penetrates the detection zone 35.
On the side facing away from the sensor assembly 85, the first magnetic field 390 penetrates into the second conductive element 260, for example via the first magnet upper side 275 or transversely into the second conductive element 260. The second conductive element 260 deflects the first magnetic field 390, e.g., to substantially 90 degrees, and directs the first magnetic field 390 toward the fifth lateral surface 265, the first magnetic field 390 reenters the first magnetic field 390 via the fifth lateral surface 265.
Opposite the first magnet assembly 75, the second magnet 195 of the second magnet assembly 80 provides a second magnetic field 395. The second magnetic field 395 travels into the second magnet 195 perpendicular to the second transverse surface 205 and the sixth transverse surface 290. The second magnetic field 395 enters the third conductive element 280 via the second lateral surface 205. In this case, the third conductive element 280 may deflect the second magnetic field 395, for example, upwards by 90 ° in the direction of the housing cover 65. The deflected second magnetic field 395 is directed by the third conductive element 280 toward the second magnet upper side 295. A second portion of the second magnetic field 395 exits the second magnet assembly 80 on a side facing the first magnet assembly 75. On the second magnet upper side 295, the second magnetic field 395 exits directly from the third conductive element 280 and from the second magnet 195. The second magnetic field 395 penetrates the housing cover 65 and the detection zone 35. At the second magnet upper side 295, a second magnetic field 395 also enters the fourth conductive element 285 laterally at the upper side. The second magnetic field 395 may also penetrate the fourth conductive element 185 laterally on a side facing away from the first magnet assembly 75. The fourth conductive element 285 deflects the second magnetic field 395 at least partially, e.g., 90 degrees, and directs it to the sixth transverse surface 290 where the second magnetic field 395 re-enters the second magnet 195.
The correction magnet 210 provides a third magnetic field 400, the third magnetic field 400 in the correction magnet 210 traveling perpendicular to the first magnetic field 390 in the first magnet 176 and perpendicular to the second magnetic field 395 in the second magnet 195. In this case, the third magnetic field 400 runs substantially parallel to the y-axis in the correction magnet 210.
The third magnetic field 400 exits the correction magnet 210 at the correction magnet upper side 245. The first correcting conductive element 235 deflects a first portion of the third magnetic field 400 laterally in the direction of the third lateral surface 215 and in the direction of the fourth lateral surface 220. A second portion of the third magnetic field 400 penetrates the first correcting conductive element 235 in a vertical direction and exits at the component upper side 225. A first portion of the third magnetic field 400 exits at the third lateral surface 215 and the fourth lateral surface 220 of the first correcting conductive element 235. Also, a portion of the third magnetic field 400 exits directly at the correction magnet 210 at the third lateral surface 215 and at the fourth lateral surface 220. The third magnetic field 400 (depending on the spatial distribution) enters the second correcting conductive element 240 at the second correcting conductive element 240 via the third and fourth lateral surfaces 215, 220 or via the assembly underside 230. The second corrective conductive element 240 directs the penetrating third magnetic field 400 toward the corrective magnet underside 250.
The first to third magnetic fields 390, 395, 400 form a total magnetic field 405. The total magnetic field 405 penetrates the detection zone 35 substantially perpendicularly (travelling in the xy-plane) and when the magnetic security feature of the document 31 is guided through the detection zone 35, it causes magnetization of the magnetic pigment of the document 31, the effect of which is that the sensor assembly 85 can detect the magnetization, which in fact occurs through the first and second magnetic fields. On the basis of the magnetization, the sensor assembly 85 may provide a sensor signal to the control device 20, which sensor signal is sensed by the control device 20 and further processed to check the magnetic security feature of the document 31 to determine authenticity.
In this case, the total magnetic field 405 is oriented such that the total magnetic field 405 penetrates the sensor assembly 85 substantially perpendicular, in particular perpendicular, to the sensor upper side 325. An advantage of this arrangement is that the sensor assembly 85 can detect the magnetic security features of the document 31 with particular accuracy, since the sensor assembly 85 does not detect stray magnetic fields due to incorrect orientation of the total magnetic field.
In addition, the total magnetic field 405 is adjusted by the divergent field generated by the correction magnet assembly 95 such that only the convergent common magnetic field provided by the first and second magnets 75, 80 (without the correction magnet assembly) is modified to form a parallel total magnetic field 405 in close proximity to the sensor assembly 85.
As a result, the sensor device 85 can at least particularly reliably sense at least the magnetic security feature of the document 31, in particular as a certificate of value securities in a payment transaction, for example.
Without the correction magnet assembly 95, then only the total magnetic field generated by the first and second magnet assemblies 75, 80 penetrates the sensor assembly 85 with its magnetic field lines traveling obliquely relative to the sensor upper side 325 such that when the magnetic security feature is sensed, the sensor assembly 85 always senses at least one component of the total magnetic field generated by the first and second magnet assemblies 75, 80. The magnetic security feature of the document 31, in particular of the value document, cannot be reliably detected due to the overload of the sensor caused by this and the displacement of the operating point of the sensor into the disadvantageous region of the sensor characteristic curve of the sensor assembly 85.
Furthermore, the arrangement of the sensor device 15 described in fig. 1 to 9 has the advantage that the total magnetic field 405 is particularly strong in the detection zone 35, so that the magnetic security feature 31 can be measured particularly precisely.
It should be noted that the configuration of the sensor device 15 shown in fig. 1 to 9 is given as an example. Of course, it is also conceivable to configure the sensor device 15 differently, or to consider the alternatives described above.
Claims (21)
1. A sensor device (15),
having at least one first magnet assembly (75), at least one second magnet assembly (80) and at least one sensor assembly (85),
wherein the sensor assembly (85) has a detection zone (35) for sensing a magnetic security feature of the document (31),
wherein the first magnet assembly (75) has at least one first magnet (176) providing a first magnetic field (390), the second magnet assembly (80) has at least one second magnet (195) providing a second magnetic field (395),
wherein the first magnet (176) has a first lateral surface (185), the first lateral surface (185) facing the second magnet assembly (80) and defining a gap space (120), the second magnet (195) has a second lateral surface (205), the second lateral surface (205) facing the first magnet assembly (75) and defining the gap space (120),
wherein the sensor assembly (85) is arranged in the interstitial space (120),
the method is characterized in that:
a correction magnet assembly (95) arranged on a side of the sensor assembly (85) facing away from the detection zone (35),
Wherein the correction magnet assembly (95) is arranged in the gap space (120) and is inclined with respect to the first lateral surface (185) and/or the second lateral surface (205) and has at least one correction magnet (210) providing a third magnetic field (400),
wherein the first to third magnetic fields (390, 395, 400) interact to form a total magnetic field (405), and the total magnetic field (405) penetrates the sensor assembly (85) in a predetermined orientation.
2. The sensor device (15) according to claim 1,
wherein the total magnetic field (405) penetrates the sensor assembly (85) in a main direction substantially perpendicular to the extent of the sensor assembly (85).
3. The sensor device (15) according to claim 1 or 2,
wherein the correction magnet assembly (95) is arranged at a distance from the first magnet assembly (75) and the second magnet assembly (80),
wherein the correction magnet (210) has a correction magnet upper side (245) and a correction magnet lower side (250),
wherein the correction magnet upper side (245) and/or the correction magnet lower side (250) are arranged obliquely with respect to the first transverse surface (185) and/or the second transverse surface (205),
Wherein the third magnetic field (400) leaves substantially via the correction magnet upper side (245) and enters substantially via the correction magnet lower side (250).
4. A sensor device (15) according to claim 3,
wherein the correction magnet assembly (95) has a third lateral surface (215) facing the first lateral surface (185) and a fourth lateral surface (220) facing the second lateral surface (205),
wherein the sensor assembly (85) has a sensor upper side (325) facing the detection zone (35),
wherein the correction magnet assembly (95) has an assembly upper side (225) arranged facing the sensor assembly (85),
wherein the assembly upper side (225) is arranged parallel to the sensor upper side (325).
5. The sensor device (15) according to claim 4,
wherein the first lateral surface (185) and the second lateral surface (205) are oriented parallel to each other, or at an inclination angle of less than 5 °,
wherein the third lateral surface (215) and the fourth lateral surface (220) are oriented parallel to each other and advantageously parallel to the first lateral surface (185) and/or the second lateral surface (205).
6. The sensor device (15) according to claim 1 or 2,
wherein the correction magnet assembly (95) is arranged in a central position between the first lateral surface (185) and the second lateral surface (205).
7. The sensor device (15) according to claim 4,
wherein the correction magnet (210) is designed in a block shape,
wherein the corrective magnet assembly (95) has a first corrective conductive element (235) and a second corrective conductive element (240),
wherein the first correcting conductive element (235) and the second correcting conductive element (240) are each designed in the form of a plate,
wherein the first correction conductive element (235) is arranged on the correction magnet upper side (245) and the second correction conductive element (240) is arranged on the correction magnet lower side (250),
wherein the first corrective conductive element (235) is designed to guide the third magnetic field (400) at least partially between the assembly upper side (225) and the corrective magnet upper side (245), and the second corrective conductive element (240) is designed to guide the third magnetic field (400) at least partially between the assembly lower side (230) and the corrective magnet lower side (250).
8. The sensor device (15) according to claim 7,
wherein the correction magnet assembly (95) has a number of correction magnets (210) arranged in a row (305),
wherein the correction magnets (210) are abutted with their end faces against each other,
wherein the first corrective conductive element (235) extends on a corrective magnet upper side (245) of the corrective magnet (210) and is connected to the corrective magnet upper side (245) by a material bond,
wherein the second correction conductive element (240) extends on a correction magnet underside (250) of the correction magnet (210) and is connected to the correction magnet underside (250) by a material bond,
wherein the first correction conductive element (235) and the second correction conductive element (240) connect the correction magnets (210) to each other.
9. The sensor device (15) according to claim 4,
has a housing (50) with a housing cover (65),
wherein the housing cover (65) is arranged on a side of the sensor assembly (85) facing away from the correction magnet assembly (95),
wherein the housing cover (65) at least partially delimits a housing interior (70) and has a cover inner side (175) on a side facing the housing interior (70),
Wherein the first magnet assembly (75) has a first magnet upper side (275) on a side facing the cover inner side (175),
wherein the first magnet upper side (275) abuts the cover inner side (175),
and/or
Wherein the second magnet assembly (80) has a second magnet upper side (295) on a side facing the cover inner side (175),
wherein the second magnet upper side (295) abuts the cover inner side (175).
10. The sensor device (15) according to claim 9,
wherein the sensor upper side (325) is arranged at a predetermined distance (a) from the cover inner side (175) 1 ）。
11. The sensor device (15) according to claim 9,
wherein the housing cover (65) has a first housing section (145) and at least one second housing section (150),
wherein the first housing section (145) and the second housing section (150) are each designed as a plate and are connected to one another at a first connection point (160),
wherein the second housing section (150) is arranged obliquely with respect to the first housing section (145),
wherein the first magnet assembly (75) abuts the first housing section (145) near the first connection location (160).
12. The sensor device (15) according to claim 11,
wherein the housing cover (65) has a third housing section (155),
wherein the third housing section (155) is plate-shaped and is connected to the first housing section (145) by a second connection point (170) opposite the first connection point (160),
wherein the third housing section (155) is arranged obliquely with respect to the first housing section (145),
wherein the first magnet assembly (75), the second magnet assembly (80), the sensor assembly (85) and the correction magnet assembly (95) are arranged between the second housing section (150) and the third housing section (155),
wherein the second magnet assembly (80) abuts the first housing section (145) near the second connection location (170).
13. The sensor device (15) according to claim 9,
wherein the housing (50) has at least one first housing part (55) extending in a longitudinal direction and a second housing part (60) connected to the first housing part (55) in a transverse direction,
wherein, on the side facing the housing cover (65), the first housing part (55) delimits a socket (360) together with the second housing part (50),
Wherein the socket (360) is laterally closed by the first housing part (55) and the second housing part (60) and is designed to be open on the side facing the housing cover (65),
wherein the calibration magnet assembly (95) and the sensor assembly (85) are disposed in the receptacle (360).
14. The sensor device (15) according to claim 1 or 2,
wherein the first magnet assembly (75) has a longitudinal extent in a longitudinal direction and the correction magnet assembly (95) has another longitudinal extent in the longitudinal direction,
wherein the longitudinal extent and the further longitudinal extent are different.
15. The sensor device (15) according to claim 1 or 2,
wherein the first magnet assembly (75) has a first end face (330), the second magnet assembly (80) has a second end face (335), the correction magnet assembly (95) has a third end face (340),
wherein the first end face (330) and the second end face (335) are arranged in a common plane (345),
wherein the third end face (340) is arranged at a distance from the plane (345) on a side of the plane (345) facing the sensor assembly (85).
16. A sensor device (15) according to claim 3, wherein the correction magnet upper side (245) and/or the correction magnet lower side (250) are arranged perpendicularly with respect to the first lateral surface (185) and/or the second lateral surface (205).
17. The sensor device (15) of claim 5, wherein the first lateral surface (185) and the second lateral surface (205) are oriented at an inclination of less than 2 ° to each other.
18. The sensor device (15) of claim 5, wherein the first lateral surface (185) and the second lateral surface (205) are oriented at an inclination angle of less than 1 ° to each other.
19. The sensor device (15) according to claim 10, wherein the predetermined distance is 20 to 250 μm.
20. The sensor device (15) according to claim 10, wherein the predetermined distance is 50 to 130 μm.
21. A system (10),
with a sensor device (15) according to any of the preceding claims and a control apparatus (20),
wherein the control device (20) is connected to the sensor means (15),
wherein the sensor device (15) is designed to provide a sensor signal in accordance with a magnetic security feature of the document (31), which may be arranged on the upper side of a housing (50) of the sensor device,
Wherein the control device (20) is designed to sense and further process the sensor signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019103723.9 | 2019-02-14 | ||
| DE102019103723.9A DE102019103723A1 (en) | 2019-02-14 | 2019-02-14 | Sensor device and system for detecting a magnetic security feature of a document |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111640237A CN111640237A (en) | 2020-09-08 |
| CN111640237B true CN111640237B (en) | 2024-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010092021.6A Active CN111640237B (en) | 2019-02-14 | 2020-02-14 | Sensor device and system for sensing magnetic security features of a document |
Country Status (2)
| Country | Link |
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| CN (1) | CN111640237B (en) |
| DE (1) | DE102019103723A1 (en) |
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| CN108140271A (en) * | 2015-09-30 | 2018-06-08 | 富士通先端科技株式会社 | The bearing calibration of paper processing equipment and paper processing equipment |
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| JP2002230617A (en) * | 2001-01-30 | 2002-08-16 | Toshiba Corp | Magnetic detector for paper sheets |
| CN1501093A (en) * | 2002-11-13 | 2004-06-02 | ���µ�����ҵ��ʽ���� | Magnetic field sensor ,magnetic field detection device and method |
| CN101065721A (en) * | 2004-09-27 | 2007-10-31 | 皇家飞利浦电子股份有限公司 | Magnetic sensor for input devices |
| CN101411170A (en) * | 2006-03-30 | 2009-04-15 | 京瓷株式会社 | Mobile electronic device and method for calibrating terrestrial magnetism sensor |
| CN101606041A (en) * | 2007-01-09 | 2009-12-16 | 莱姆福德电子有限责任公司 | Measurement mechanism |
| CN102272613A (en) * | 2008-12-10 | 2011-12-07 | 德国捷德有限公司 | Magnetic sensor for checking value documents |
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| CN103809137A (en) * | 2014-02-21 | 2014-05-21 | 中国人民银行印制科学技术研究所 | Paper sheet detection device and paper sheet detection method |
| CN104091388A (en) * | 2014-07-22 | 2014-10-08 | 新达通科技股份有限公司 | Paper currency authentic identification method and device based on magnetic images |
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| CN111640237A (en) | 2020-09-08 |
| DE102019103723A1 (en) | 2020-08-20 |
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