CN207396704U - Magnetic image sensor - Google Patents
Magnetic image sensor Download PDFInfo
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- CN207396704U CN207396704U CN201721280270.8U CN201721280270U CN207396704U CN 207396704 U CN207396704 U CN 207396704U CN 201721280270 U CN201721280270 U CN 201721280270U CN 207396704 U CN207396704 U CN 207396704U
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- permanent magnet
- image sensor
- magnetic conduction
- conduction tablet
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Abstract
This application provides a kind of magnetic image sensors.The magnetic image sensor includes：Permanent magnet, for magnetizing the soft magnetism information in object to be detected；Magnetic conduction tablet, is arranged on the surface of permanent magnet, and the part line of magnetic induction for permanent magnet to be generated becomes the vertical line of magnetic induction；Test section is arranged on the surface of separate permanent magnet of magnetic conduction tablet, for detecting the magnetic information in object to be detected.Magnetic conduction tablet in the magnetic image sensor is no matter from direction or in intensity, all so that Distribution of Magnetic Field is uniform, and then the detection of the magnetic information on object to be detected carries out in the uniform environment of Distribution of Magnetic Field, ensure that the testing result of magnetic image sensor has higher accuracy.
Description
Technical field
This application involves sensor field, in particular to a kind of magnetic image sensor.
Background technology
Made on the media such as bank note, bill, marketable securities specific magnetic information have become it is modern anti-fake a kind of heavy
Want means, the banknotes of many countries (such as RMB, dollar, Euro etc.) internal all comprising abundant magnetic information.These magnetic informations
It is continuous magnetic pattern identification mostly, and it requires what detection device can be evenly to detect this series of magnetic chart shape mark
Know, accurate judgement can be only achieved the purpose precisely distinguishing true from false.
The existing equipment for detecting for anti-fake magnetic information is magnetic image sensor, at present, magnetic image sensor
Structure in generally comprise permanent magnet, for magnetizing soft magnetism anti-counterfeiting mark so that it can be detected.
Permanent magnet can generate magnetic field in itself, and the direction of magnetic induction line is generally from N poles to S poles in magnetic field.Permanent magnet central place
Magnetic induction line with vertical direction is relatively more, and permanent magnet edge is more to the curved magnetic induction line in both sides, from permanent magnet 1' centers to side
The Distribution of Magnetic Field of edge is uneven and direction is in a mess from vertical direction to horizontal direction, as shown in Figure 1.This allows for magnetic information one
Be detected in a highly non-uniform environment of Distribution of Magnetic Field, the result of detection it is easy to appear it is uneven or inaccurate the problems such as.This
The scanning effect and accuracy of the magnetic image sensor of sample substantially reduce.
Utility model content
The main purpose of the application is to provide a kind of magnetic image sensor, be sensed with solving magnetic image of the prior art
The problem of detection accuracy of device is relatively low.
To achieve these goals, this application provides a kind of magnetic image sensor, above-mentioned magnetic image sensor includes：Forever
Magnet, for magnetizing the soft magnetism information in object to be detected；Magnetic conduction tablet is arranged on the surface of above-mentioned permanent magnet, for by
The part line of magnetic induction for stating permanent magnet generation becomes the vertical line of magnetic induction；Test section is arranged on the separate upper of above-mentioned magnetic conduction tablet
It states on the surface of permanent magnet, for detecting the magnetic information in above-mentioned object to be detected.
Further, vertically with the plane in above-mentioned magnetic conduction slab-thickness direction be the first plane, above-mentioned permanent magnet is above-mentioned
The first projection is projected as in first plane, and above-mentioned magnetic conduction tablet is projected as the second projection in above-mentioned first plane, above-mentioned
The inside that first projection is located at the above-mentioned second projection either above-mentioned second projects the inside or above-mentioned for being located at the above-mentioned first projection
First projection is overlapped with the above-mentioned second projection.
Further, the thickness of above-mentioned magnetic conduction tablet be h, 0<h≤10mm.
Further, 0.1mm≤h≤0.3mm.
Further, above-mentioned magnetic conduction tablet includes iron plate, ferrite-plate, permalloy version and/or silicon steel plate.
Further, above-mentioned test section includes：Circuit substrate is arranged on the separate above-mentioned permanent magnet of above-mentioned magnetic conduction tablet
On surface；Detection chip is electrically connected with foregoing circuit substrate, and above-mentioned detection chip is arranged on the separate upper of foregoing circuit substrate
On the surface for stating magnetic conduction tablet.
Further, above-mentioned magnetic image sensor further includes：Cover body, above-mentioned permanent magnet, above-mentioned magnetic conduction tablet and at least
Above-mentioned test section is arranged in above-mentioned cover body.
Further, above-mentioned cover body includes：First cover body has to place above-mentioned permanent magnet and above-mentioned magnetic conduction tablet
Holding tank, and foregoing circuit substrate is additionally arranged on the surface with above-mentioned holding tank one side of above-mentioned first cover body；Second
Cover body is located at foregoing circuit substrate and is provided on the surface of above-mentioned detection chip, for protecting above-mentioned detection chip.
Further, above-mentioned permanent magnet is alloy permanent magnet or ferrite permanent magnet.
Further, above-mentioned permanent magnet has groove, and it is above-mentioned that above-mentioned magnetic conduction tablet is arranged on being provided with for above-mentioned permanent magnet
On the surface of groove.
Using the technical solution of the application, in above-mentioned magnetic image sensor, magnetic conduction is provided on the surface of permanent magnet
Tablet, the magnetic conduction tablet are formed of magnetically permeable material, which causes permanent magnet center to the magnetic induction line at edge, intensity distribution
Evenly, and mixed and disorderly distribution of the direction of magnetic induction line from original vertical direction to horizontal direction, become more vertically-oriented
Distribution, more sameization in direction, therefore, the magnetic conduction tablet all so that Distribution of Magnetic Field is equal no matter from direction or in intensity
It is even, and then the detection of the magnetic information on object to be detected carries out in the uniform environment of Distribution of Magnetic Field, ensure that magnetic image sensor
Testing result have higher accuracy.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not form the improper restriction to the application for explaining the application.In the accompanying drawings：
Fig. 1 shows the distribution schematic diagram of the middle magnetic induction line in the magnetic field that a kind of permanent magnet of the prior art generates；
Fig. 2 shows the structure diagram for the magnetic image sensor that a kind of embodiment of the application provides；
Fig. 3 shows the magnetic field of the permanent magnet generation in magnetic image sensor shown in Fig. 2 after the effect of magnetic conduction tablet
Magnetic induction line distribution schematic diagram；
Fig. 4 shows the test curve of embodiments herein and comparative example；And
Fig. 5 shows the Distribution of Magnetic Field figure of the flat permanent magnet in another embodiment of the application.
Wherein, above-mentioned attached drawing is marked including the following drawings：
1', permanent magnet；1st, cover body；2nd, permanent magnet；3rd, magnetic conduction tablet；4th, test section；11st, the first cover body；12nd, the second cover
Body；20th, groove；41st, circuit substrate；42nd, detection chip.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.It is unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " bag
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
It should be understood that when element (such as layer, film, region or substrate) be described as another element " on " when, this yuan
Intermediary element can may be present directly on another element or also in part.Moreover, in specification and following claims
In, when description has element " connected " to another element, which " can be directly connected to " to another element or by the 3rd
Element " electrical connection " is to another element.
As background technology is introduced, generate mixed and disorderly of the permanent magnet in magnetic image sensor of the prior art and
Non-uniform magnetic field so that the detection accuracy of magnetic image sensor is relatively low, and the technical issues of in order to solve as above, the application carries
A kind of magnetic image sensor is gone out.
In a kind of typical embodiment of the application, a kind of magnetic image sensor is provided, as shown in Fig. 2, the magnetic chart
Picture sensor includes permanent magnet 2, magnetic conduction tablet 3 and test section 4, and permanent magnet 2 is used to magnetize the soft magnetism information in object to be detected；
Magnetic conduction tablet 3 is arranged on the surface of above-mentioned permanent magnet 2, and the part line of magnetic induction for above-mentioned permanent magnet 2 to be generated becomes vertical
The straight line of magnetic induction；Test section 4 is arranged on the surface away from above-mentioned permanent magnet 2 of above-mentioned magnetic conduction tablet 3, for detecting above-mentioned treat
Magnetic information in detectable substance.
In above-mentioned magnetic image sensor, magnetic conduction tablet is provided on the surface of permanent magnet, the magnetic conduction tablet is by magnetic conduction
Material is formed, which causes permanent magnet center to the magnetic induction line at edge, intensity distribution evenly, and the direction of magnetic induction line
Mixed and disorderly distribution from original vertical direction to horizontal direction, becomes more vertically-oriented distribution, more sameization in direction,
Therefore, the magnetic conduction tablet is no matter from direction or in intensity, all so that Distribution of Magnetic Field is uniform, and then the magnetic letter on object to be detected
The detection of breath carries out in the uniform environment of Distribution of Magnetic Field, ensure that magnetic image sensor testing result have it is higher accurate
Property.
Magnetic conduction tablet in the application can be arranged on the part surface of permanent magnet, can also be completely covered on permanent magnet
Surface on, magnetic conduction tablet can be arranged to suitable size by those skilled in the art according to actual conditions.
In a kind of embodiment of the application, using vertical and above-mentioned 3 thickness direction of magnetic conduction tablet plane as the first plane, on
It states permanent magnet 2 and is projected as the first projection, projection of the above-mentioned magnetic conduction tablet 3 in above-mentioned first plane in above-mentioned first plane
For the second projection, above-mentioned first projection is located at the inside of the above-mentioned second projection, above-mentioned second projection is located at the above-mentioned first projection
Internal or above-mentioned first projection is overlapped with the above-mentioned second projection, in structure as shown in Figure 2, the first projection of above-mentioned permanent magnet
It is overlapped with the second projection of magnetic conduction tablet.
The thickness of magnetic conduction tablet in the application can be selected according to actual conditions, in a kind of embodiment of the application, on
The thickness of magnetic conduction tablet is stated as h, 0<h≤10mm.So can on the one hand it ensure by the strong of magnetic conduction tablet treated magnetic field
It spends larger, on the other hand can ensure the distribution uniform in magnetic field.
In order to further ensure the distribution uniform in the magnetic field after the effect of magnetic conduction tablet, and intensity is larger, the application
A kind of embodiment in, 0.1mm≤h≤0.3mm.
Magnetic conduction tablet in the application can be the magnetic conduction tablet that any permeability magnetic material is formed, and those skilled in the art can be with
According to actual conditions suitable permeability magnetic material is selected to form suitable magnetic conduction tablet.
In order to further ensure the magnetic conduction tablet is to the treatment effect in magnetic field, both having ensured can be smaller with the strength retrogression in magnetic field
I.e. intensity is larger, and can ensure Distribution of Magnetic Field than more uniform, and in a kind of embodiment of the application, above-mentioned magnetic conduction tablet 3 includes
Iron plate, ferrite-plate, permalloy version and/or silicon steel plate.
Test section in the application can be any type of detection structure of the prior art, and those skilled in the art can
To have the test section of suitable construction according to actual conditions selection such as accuracy of detection and/or detection efficiency.
In order to simplify the structure of test section and improve the efficiency and accuracy of detection, the another embodiment of the application
In, above-mentioned test section 4 includes circuit substrate 41 and detection chip 42, wherein, circuit substrate 41 is arranged on above-mentioned magnetic conduction tablet 3
On surface away from above-mentioned permanent magnet 2, it is defeated that circuit substrate is used for the signal for driving detection chip and detecting detection chip
Go out；Detection chip 42 is electrically connected with foregoing circuit substrate 41, and above-mentioned detection chip 42 is arranged on the remote of foregoing circuit substrate 41
On surface from above-mentioned magnetic conduction tablet 3, detection chip is used to detect the variation of magnetic signal.
Also, the detection chip of the application is not limited to one, can be multiple, also, is also not necessarily limited to one kind, can wrap
It includes a variety of, such as multiple sense magneto-resistor chips being arranged in order and multiple magnetic induction related chips can be included.This field skill
Art personnel can select the detection chip of suitable construction according to actual conditions, just repeat no more herein.
In order to support and protect above-mentioned permanent magnet, magnetic conduction tablet and test section, in a kind of embodiment of the application,
As shown in Fig. 2, above-mentioned magnetic image sensor further includes cover body 1, above-mentioned permanent magnet 2, above-mentioned magnetic conduction tablet 3 and at least the above inspection
Survey portion 4 is arranged in above-mentioned cover body 1.
In the another embodiment of the application, above-mentioned cover body 1 includes the first cover body 11 and the second cover body 12, wherein, first
Cover body 11 has the holding tank for placing above-mentioned permanent magnet 2 and above-mentioned magnetic conduction tablet 3, and magnetic conduction tablet 3 is arranged on permanent magnetism
On the surface of body 2, and the surface of the surface of the separate permanent magnet 2 of magnetic conduction tablet 3 and the first cover body 11 of holding tank both sides is same
In one plane.Circuit substrate 41 is additionally arranged on the surface of the first cover body 11 of holding tank both sides, the first cover body to it is above-mentioned forever
Magnet and magnetic conduction tablet play the role of support and protection；Second cover body 12 is located at foregoing circuit substrate 41 and is provided with
On the surface for stating detection chip 42, for protecting above-mentioned detection chip 42, detection chip is prevented to be damaged or damage and influence
Testing result.
The influence in the magnetic field that extraneous magnetic field generates magnetic image sensor in order to prevent, and then ensure the inspection of object to be detected
It is uniform magnetic field to survey environment, and in a kind of embodiment of the application, above-mentioned first cover body is the cover body that non-magnet material is formed.
Meanwhile in order to avoid interference of the extraneous signal to the detection structure of detection chip, a kind of embodiment of the application
In, above-mentioned second cover body is the cover body that non-magnet material is formed, and can so stop it influences the testing result of magnetic image sensor,
Further improve the accuracy of the detection of magnetic image sensor.
The permanent magnet of the application can be any one of the prior art permanent-magnet material formed permanent magnet, this field
Technical staff can form the permanent magnet of the application according to the suitable permanent-magnet material of actual conditions selection.
In a kind of embodiment of the application, above-mentioned permanent magnet 2 is alloy permanent magnet or ferrite permanent magnet.Both materials
It easily buys and magnetic efficiency is preferable.
In order to enable the vertical component in the magnetic field that permanent magnet generates is more, and then with better uniformity, the application
A kind of embodiment in, as shown in Fig. 2, above-mentioned permanent magnet 2 has groove 20, above-mentioned magnetic conduction tablet 3 is arranged on above-mentioned permanent magnet 2
Be provided on the surface of above-mentioned groove 20.Fig. 5 shows a kind of magnetic field schematic diagram including flat permanent magnet, with Fig. 3
The reeded permanent magnet 2 of tool compare, the vertical component in the magnetic field of the flat permanent magnet is relatively small.
In order to enable those skilled in the art can clearly understand the technical solution of the application, below with reference to tool
The embodiment and comparative example of body illustrates the technical solution of the application.
Embodiment 1
The structure of magnetic image sensor is as shown in Fig. 2, specifically include the first cover body 11, permanent magnet 2, magnetic conduction tablet 3, circuit
Substrate 41,42 and second cover body 12 of detection chip.Wherein, the first cover body 11 includes holding tank, and permanent magnet 2 and magnetic conduction are put down
Plate 3 is arranged in holding tank, and magnetic conduction tablet 3 is arranged in the permanent magnet surfaces of 20 both sides of groove of permanent magnet 2, and magnetic conduction
The surface of the separate permanent magnet 2 of tablet 3 and the surface of the first cover body 11 of holding tank both sides are in the same plane.Circuit substrate
41 are arranged on the surface of the first cover body 11 of on the surface of magnetic conduction tablet 3 and holding tank both sides, and detection chip 42 is arranged on
On the surface of the separate magnetic conduction tablet 3 of circuit substrate 41.Second cover body 12 be located on foregoing circuit substrate 41 and with circuit base
Plate 41 forms the cavity of a receiving detection chip 42 to protect detection chip 42.
Above-mentioned permanent magnet 2 is ferrite permanent magnet, and above-mentioned magnetic conduction tablet 3 is ferrite-plate, and its thickness is 10mm.
Embodiment 2
Difference lies in above-mentioned magnetic conduction tablet is iron plate, and its thickness is 0.1mm with embodiment 1.
Embodiment 3
Difference lies in the thickness of iron plate is 0.2mm with embodiment 2.
Embodiment 4
Difference lies in the thickness of iron plate is 0.3mm with embodiment 2.
Embodiment 5
Difference lies in the thickness of iron plate is 0.35mm with embodiment 2.
Embodiment 6
Difference lies in the thickness of iron plate is 1.0mm with embodiment 2.
Comparative example
Difference lies in do not include iron plate, circuit substrate directly rides upon groove with embodiment 2 in the magnetic image sensor
In the both side surface of first cover body of both sides.
The magnetic field that the part-structure formation for including permanent magnet and magnetic conduction tablet of each embodiment is measured using gaussmeter is existed
The magnetic field intensity of length direction, and to the magnetic field that the permanent magnet in comparative example is formed in the magnetic field intensity of length direction, test knot
Fruit sees Fig. 4.
From the test result in Fig. 4, from embodiment compared with the test curve of comparative example, each embodiment
Magnetic field's regularity is better than comparative example；Compared to other embodiments, the magnetic field's regularity of embodiment 2 to 4 preferably and
Intensity is higher；Compared with Example 2, embodiment 1 due to the thickness of magnetic conduction tablet it is larger so that field decay is larger, magnetic field
Intensity is smaller；Compared with Example 2, embodiment 5 so that field decay is larger since the thickness of magnetic conduction tablet is more than 0.3mm
The intensity in magnetic field is smaller；Compared with Example 2, embodiment 6 causes magnetic field to decline since the thickness of magnetic conduction tablet is more than 0.3mm
The intensity for subtracting larger magnetic field is smaller.
It can be seen from the above description that the application the above embodiments realize following technique effect：
In the magnetic image sensor of the application, magnetic conduction tablet is provided on the surface of permanent magnet, the magnetic conduction tablet is by leading
Magnetic material is formed, which causes permanent magnet center to the magnetic induction line at edge, intensity distribution evenly, and the side of magnetic induction line
To the mixed and disorderly distribution from original vertical direction to horizontal direction, become more vertically-oriented distribution, direction is more same
Change, therefore, the magnetic conduction tablet is no matter from direction or in intensity, all so that Distribution of Magnetic Field is uniform, and then on object to be detected
The detection of magnetic information carries out in the uniform environment of Distribution of Magnetic Field, ensure that the testing result of magnetic image sensor with higher
Accuracy.
The foregoing is merely the preferred embodiments of the application, are not limited to the application, for the skill of this field
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Claims (10)
1. a kind of magnetic image sensor, which is characterized in that the magnetic image sensor includes：
Permanent magnet (2), for magnetizing the soft magnetism information in object to be detected；
Magnetic conduction tablet (3), is arranged on the surface of the permanent magnet (2), for the part magnetic strength for generating the permanent magnet (2)
Line is answered to become the vertical line of magnetic induction；And
Test section (4) is arranged on the surface away from the permanent magnet (2) of the magnetic conduction tablet (3), for detecting described treat
Magnetic information in detectable substance.
2. magnetic image sensor according to claim 1, which is characterized in that vertically with magnetic conduction tablet (3) the thickness side
To plane for the first plane, the permanent magnet (2) is projected as the first projection, the magnetic conduction tablet in first plane
(3) the second projection is projected as in first plane, first projection is located inside or the institute of the described second projection
The second projection is stated to overlap with the described second projection positioned at the inside of the described first projection or first projection.
3. magnetic image sensor according to claim 1, which is characterized in that the thickness of the magnetic conduction tablet (3) be h, 0<h
≤10mm。
4. magnetic image sensor according to claim 3, which is characterized in that 0.1mm≤h≤0.3mm.
5. magnetic image sensor according to claim 1, which is characterized in that the magnetic conduction tablet (3) includes iron plate, iron oxygen
Body plate, permalloy version and/or silicon steel plate.
6. magnetic image sensor according to claim 1, which is characterized in that the test section (4) includes：
Circuit substrate (41) is arranged on the surface away from the permanent magnet (2) of the magnetic conduction tablet (3)；And
Detection chip (42) is electrically connected with the circuit substrate (41), and the detection chip (42) is arranged on the circuit base
On the surface away from the magnetic conduction tablet (3) of plate (41).
7. magnetic image sensor according to claim 6, which is characterized in that the magnetic image sensor further includes：
Cover body (1), the permanent magnet (2), the magnetic conduction tablet (3) and at least described test section (4) are arranged on the cover body
(1) in.
8. magnetic image sensor according to claim 7, which is characterized in that the cover body (1) includes：
First cover body (11) has the holding tank for placing the permanent magnet (2) and the magnetic conduction tablet (3), and described
Circuit substrate (41) is additionally arranged on the surface with the holding tank one side of first cover body (11)；And
Second cover body (12) is located at the circuit substrate (41) and is provided on the surface of the detection chip (42), for protecting
Protect the detection chip (42).
9. magnetic image sensor according to any one of claim 1 to 8, which is characterized in that the permanent magnet (2) is conjunction
Golden permanent magnet or ferrite permanent magnet.
10. magnetic image sensor according to any one of claim 1 to 8, which is characterized in that permanent magnet (2) tool
Fluted (20), the magnetic conduction tablet (3) are arranged on being provided on the surface of the groove (20) of the permanent magnet (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721280270.8U CN207396704U (en) | 2017-09-30 | 2017-09-30 | Magnetic image sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721280270.8U CN207396704U (en) | 2017-09-30 | 2017-09-30 | Magnetic image sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207396704U true CN207396704U (en) | 2018-05-22 |
Family
ID=62330801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721280270.8U Active CN207396704U (en) | 2017-09-30 | 2017-09-30 | Magnetic image sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107607892A (en) * | 2017-09-30 | 2018-01-19 | 威海华菱光电股份有限公司 | Magnetic image sensor |
-
2017
- 2017-09-30 CN CN201721280270.8U patent/CN207396704U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107607892A (en) * | 2017-09-30 | 2018-01-19 | 威海华菱光电股份有限公司 | Magnetic image sensor |
| CN107607892B (en) * | 2017-09-30 | 2024-05-10 | 威海华菱光电股份有限公司 | Magnetic image sensor |
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