CN107993333A - Magnetic image sensor - Google Patents
Magnetic image sensor Download PDFInfo
- Publication number
- CN107993333A CN107993333A CN201711326812.5A CN201711326812A CN107993333A CN 107993333 A CN107993333 A CN 107993333A CN 201711326812 A CN201711326812 A CN 201711326812A CN 107993333 A CN107993333 A CN 107993333A
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- Prior art keywords
- magnetic
- chip
- image sensor
- signal processing
- sense
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- 238000012545 processing Methods 0.000 claims abstract description 64
- 239000000758 substrate Substances 0.000 claims description 20
- 239000011241 protective layer Substances 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 9
- 230000008859 change Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007688 edging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000003319 supportive effect Effects 0.000 description 1
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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/038—Measuring direction or magnitude of magnetic fields or magnetic flux using permanent magnets, e.g. balances, torsion devices
-
- 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
- G07D7/20—Testing patterns thereon
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D2207/00—Paper-money testing devices
Abstract
The invention discloses a kind of magnetic image sensor.Wherein, which includes：Permanent magnet, for producing magnetic field；At least one sense magnetic chip group, at least one sense magnetic chip group is in parallel, and each feeling magnetic chip group includes multiple sense magnetic chips of series connection, and each sense magnetic chip is respectively positioned in the magnetic field of permanent magnet generation and the magnetic field each sensed is converted to electric signal；Signal processing chip, is connected with least one sense magnetic chip group, for receiving the electric signal of each sense magnetic chip group；Interface module, is connected with signal processing chip, for exporting the electric signal of signal processing chip output.The present invention solves the higher technical problem of magnetic image sensor cost in correlation technique.
Description
Technical field
The present invention relates to field of image sensors, in particular to a kind of magnetic image sensor.
Background technology
Specific magnetic information is made on the media such as bank note, bill, marketable securities and has become modern false proof one kind weight
Want means, it is therefore desirable to which specific sensor differentiates these magnetic informations.With rapid development of economy, Magnetic Sensor demand
Also it is increasing.
Existing magnetic image sensor is primarily present several drawbacks, and magnetic image sensor existing first needs magnetic strength chip
Quantity is more, it is necessary to which close-packed arrays are across whole scanning length, and chip volume is big, causes overall small product size inclined
Greatly, installing to later product increases difficulty.In addition each magnetic strength chip needs to export signal all the way, and per road, output signal will match
Set of circuits does signal processing, greatly increases cost, also improves the use difficulty of product.
For the higher technical problem of the magnetic image sensor cost in correlation technique, effective solve not yet is proposed at present
Scheme.
The content of the invention
An embodiment of the present invention provides a kind of magnetic image sensor, at least to solve the magnetic image sensor in correlation technique
The higher technical problem of cost.
One side according to embodiments of the present invention, there is provided a kind of magnetic image sensor, the magnetic image sensor include：
Permanent magnet, for producing magnetic field；At least one sense magnetic chip group, each multiple sense magnetic chips felt magnetic chip group and include connecting,
Each sense magnetic chip is respectively positioned in the magnetic field of permanent magnet generation and the magnetic field each sensed is converted to electric signal；Signal processing
Chip, is connected with least one sense magnetic chip group, for receiving the electric signal of at least one sense magnetic chip group；Interface module,
It is connected with signal processing chip, for exporting the electric signal of signal processing chip output.
Further, at least one sense magnetic chip component is at least one sense magnetic chip group unit, each to feel magnetic chip group
Unit include one sense magnetic chip group or parallel connection multiple sense magnetic chip groups, signal processing chip include at least one input terminal and
One output terminal, each input terminal are connected with a sense magnetic chip group unit, and output terminal is connected with interface module, signal processing
Chip is used to the electric signal that at least one input terminal receives being sequentially output to interface module.
Further, signal processing chip further includes clock signal terminal, and clock signal terminal is used to receive clock signal, signal
Process chip is used for subject clock signal and triggers and be sequentially output the electric signal that at least one input terminal receives by output terminal.
Further, which further includes：Differential amplifier circuit, is connected to signal processing chip and interface mould
Between block, the electric signal for the output terminal output to signal processing chip carries out differential amplification.
Further, the input anode of differential amplifier circuit is connected with the output terminal of signal processing chip, and difference is put
The input cathode of big circuit is connected with reference voltage, and the output terminal of differential amplifier circuit is connected with the input terminal of interface module
Connect.
Further, each multiple sense magnetic chips of sense magnetic chip group are spaced along preset direction.
Further, which further includes：Framework, permanent magnet are installed in framework；First line substrate, extremely
A few sense magnetic chip group and signal processing chip are arranged on the side of first line substrate, and framework is arranged on first line substrate
Opposite side.
Further, which further includes：At least a piece of protective layer, is covered at least one sense magnetic chip group
And/or the outside of signal processing chip.
Further, which further includes：Cover sheet, is located at the top of first line substrate, is used for
Cover the chip on first line substrate.
Further, which further includes：Second circuit base plate, side of the framework away from first line substrate
The side of the second circuit base plate is arranged on, interface module is arranged on the opposite side of the second circuit base plate；Signal connecting line, for even
Connect signal processing chip and interface module.
In embodiments of the present invention, magnetic field is produced by permanent magnet, by least one sense magnetic chip group in parallel, its
In, each multiple sense magnetic chips felt magnetic chip group and include connecting, each feel magnetic chip and are respectively positioned in the magnetic field of permanent magnet generation
And the magnetic field each sensed is converted into electric signal, pass through the signal processing chip being connected with least one sense magnetic chip group
The electric signal of each sense magnetic chip group is received, signal processing chip is exported by the interface module being connected with signal processing chip
The electric signal of output, solves the higher technical problem of magnetic image sensor cost in correlation technique, and then realize can
Reduce the technique effect of the cost of magnetic image sensor.
Brief description of the drawings
Attached drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is a kind of schematic cross-section of optional magnetic image sensor according to embodiments of the present invention；
Fig. 2 is a kind of electronic schematic diagram of optional magnetic image sensor according to embodiments of the present invention；
Fig. 3 is the electronic schematic diagram of the optional magnetic image sensor of another kind according to embodiments of the present invention；
Fig. 4 is the electronic schematic diagram of the optional magnetic image sensor of another kind according to embodiments of the present invention；
Fig. 5 is the electronic schematic diagram of the optional magnetic image sensor of another kind according to embodiments of the present invention.
Embodiment
In order to make those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Attached drawing, is clearly and completely described the technical solution in the embodiment of the present invention, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's all other embodiments obtained without making creative work, should all belong to the model that the present invention protects
Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned attached drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use
Data can exchange in the appropriate case, so as to the embodiment of the present invention described herein can with except illustrating herein or
Order beyond those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover
Cover non-exclusive include.
This application provides a kind of embodiment of magnetic image sensor.
Fig. 1 is a kind of schematic cross-section of optional magnetic image sensor according to embodiments of the present invention, as shown in Figure 1,
The magnetic image sensor includes permanent magnet 2, and (each sense magnetic chip group includes multiple sense magnetic of series connection at least one sense magnetic chip group
Chip 5), signal processing chip 7, interface module 11.Permanent magnet 2 is used to produce magnetic field.Each sense magnetic chip 5 is respectively positioned on permanent magnet
In 2 magnetic fields produced, and the magnetic field each sensed is converted into electric signal.Signal processing chip 7 and at least one sense magnetic core
Piece group is connected, for receiving the electric signal of at least one sense magnetic chip group.Interface module 11 is connected with signal processing chip 7
Connect, for exporting the electric signal of the output of signal processing chip 7.
Optionally, at least one sense magnetic chip component is at least one sense magnetic chip group unit, each to feel magnetic chip group list
Multiple sense magnetic chip groups of the member including a sense magnetic chip group or parallel connection are, it is necessary to which explanation, each sense magnetic chip group are pertaining only to
One sense magnetic core blade unit.Signal processing chip 7 includes at least one input terminal and an output terminal, each input terminal and one
Feel the connection of magnetic chip group unit, at least one input terminal is corresponded with least one sense magnetic chip group unit, each input terminal
The sense magnetic chip group unit connected can be referred to as a sub-prime, and each sub-prime inputs an electric signal to input terminal.For example, such as
Shown in Fig. 3, each input terminal of signal processing chip 7 is connected with a sense magnetic chip group unit (sub-prime), each feels magnetic chip
Group unit is connected including multiple sense magnetic chip groups in parallel, and each sense magnetic chip group includes multiple sense magnetic chips 5.At signal
The output terminal of reason chip 7 is connected with the interface module 11 shown in Fig. 1, and signal processing chip 7 is used for successively will be at least one
The electric signal output that input terminal receives is to interface module 11.
Signal processing chip 7 further includes clock signal terminal, and clock signal terminal is used to receive clock signal, signal processing chip
7, which are used for subject clock signal, triggers and is sequentially output the electric signal that at least one input terminal receives by output terminal.Such as Fig. 5 institutes
Show, the multiple input end of signal processor 7 connects one to one with multiple sub-primes respectively, the clock signal of signal processing chip 7
End is used to receive clock signal clk, and receives enabling signal SI by another input terminal, and signal processing chip 7 is receiving
After enabling signal SI, one of multiple input end is sequentially output by output terminal according to the edging trigger of clock signal clk and is received
The electric signal arrived.
Further, as shown in figure 5, the magnetic image sensor further includes differential amplifier circuit 10, differential amplifier circuit 10
It is connected between signal processing chip 7 and interface module 11 (not shown in Fig. 5), for the output terminal to signal processing chip 7
The electric signal of output carries out differential amplification, and exports to interface module 11.
As shown in figure 5, the input anode (+) of differential amplifier circuit 10 is connected with the output terminal of signal processing chip 7,
For receiving signal SIGin, the input cathode (-) of differential amplifier circuit 10 is connected with reference voltage Vref, differential amplification
The output terminal of circuit 10 is connected with the input terminal of interface module 11, for export by signal SIGin and reference voltage Vref into
Signal SIGout after row differential amplification.
Multiple sense magnetic chips 5 of each sense magnetic chip group are spaced along preset direction.An as shown in Fig. 2, sense magnetic core
Piece group includes multiple sense magnetic chips 5 of series connection, and linearly compartment of terrain arranges, the sense magnetic chip group and signal processing chip 7
Connection.
As shown in Figure 1, the magnetic image sensor further includes framework 1, permanent magnet 2 is installed in framework 1；The magnetic image senses
Device further includes first line substrate 4, and at least one sense magnetic chip group and signal processing chip 7 are arranged on first line substrate 4
Side, framework 1 are arranged on the opposite side of first line substrate 4.
The magnetic image sensor further includes at least a piece of protective layer, is covered at least one sense magnetic chip group and/or signal
The outside of process chip 7.For example, as shown in Figure 1, protective layer 3 is covered in above at least one sense magnetic chip group, protective layer 6 covers
Cover above signal processing chip 7.
As shown in Figure 1, the magnetic image sensor further includes cover sheet 8, cover sheet 8 is located at first line substrate 4
Top, for covering the chip on first line substrate 4, including at least at least one sense magnetic chip group and signal processing chip
7。
As shown in Figure 1, the magnetic image sensor further includes the second circuit base plate 12, wherein, framework 1 is away from First Line roadbed
The side of plate 4 is arranged on the side of the second circuit base plate 12, and interface module 11 is arranged on the opposite side of the second circuit base plate 12.
The magnetic image sensor further includes signal connecting line 9, for connecting signal processing chip 7 and interface module 11.Tool
Body, as shown in Figure 1, signal connecting line 9 is connected between signal processing chip 7 and differential amplifier circuit 10.
A kind of specific embodiment of the magnetic image sensor of embodiment offer is described below：
As shown in Figure 1, magnetic image sensor includes the framework 1 to play a supportive role, permanent magnet 2, permanent magnet are equipped with framework 1
2 top is equipped with first line substrate 4, and the upper surface of first line substrate 4 is equipped with the sense magnetic chip 5 of isostere product very little, with
And signal processing chip 7, multiple sense magnetic chips 5 are spaced apart, and change output by mode induced field in parallel after first connecting
Signal, output signal pass through signal processing chip 7, and the signal after processing can be equipped with letter by the lower surface of first line substrate 4
Number interface unit, namely signal connecting line 9 are connected to the second circuit base plate 12 of lower surface.Electric signal passes through the second circuit base plate
Exported after 10 differential amplification of differential amplifier circuit on 12 by interface module 11 (for example, socket).4 upper table of first line substrate
The upper surface of the sense magnetic chip 5 in face is equipped with high intensity and ultra-thin protective layer 3, and the upper surface of signal processing chip 7 is equipped with high-strength
Degree and ultra-thin protective layer 6, feel and are equipped with cover sheet 8 outside the protective layer of magnetic chip 5 and signal processing chip 7.
As shown in Fig. 2, multiple sense magnetic chips 5 are spaced apart, spread all over sweep length region, so can both scan to sweep
The full detail retouched, and reduce the quantity of chip, greatly reduce cost.
As shown in figure 3, the sense magnetic chip in magnetic image sensor is connected by mode in parallel after first connecting, by multiple
Feel magnetic chip 5 and form a sense magnetic chip group, multiple sense magnetic chip groups form a sub-prime, each sub-prime and signal processing chip
7 input terminal connection.In practical applications, can be felt according to the distribution size of scanning magnetic signal, change between magnetic chip 5
Away from；Sub-prime spacing size can also be changed according to the requirement of resolution ratio.Then according to the needs of sweep length come select 1 or
The multiple sub-primes of person are formed.Each sub-prime can finally export signal all the way, these signals are all aggregated into signal processing chip 7, letter
Number process chip 7 can select 1 or multiple according to the actual requirements.
As shown in figure 4, permanent magnet 2 has a fixation and uniform magnetic field, after energization, each sub-prime can produce one surely
Fixed voltage.When there is region of the scanning object 13 by the scanning of this sub-prime, if scanning object 13 containing magnetisable material or
Soft magnetism can cause the change in magnetic field, so as to influence the change of one or more magnetic strength chip resistance values, cause when feeling the material of magnetic
The change of the overall resistance value of whole sub-prime, so as to change the size of sub-prime output voltage, and successively will by signal processing chip 7
The voltage change of each sub-prime is transmitted out, is connected on differential amplifier circuit 10, (is connect by socket by amplified signal
Mouth mold block 11) transmission come out, can thus detect this road magnetic strength chip area be magnetic material process, pass through voltage change
Size can reflect the power of magnetisable material.Otherwise there is no magnetisable material, magnetic field will not change, and feel the resistance value of magnetic chip
It will not change, the voltage of sub-prime will not change, and then the signal being output on signal processing chip 7 will not change.
As shown in figure 5, the input terminal of each sub-prime logical transport control circuit corresponding with signal processing chip 7 connects
Connect, the output of signal processing chip 7 is connected to the input anode of difference amplifier (differential amplifier circuit) 10, reference voltage
Vref is connected to the input cathode of difference amplifier 10, the result of the output terminal output difference amplification of difference amplifier 10.
An embodiment of the present invention provides a kind of inexpensive magnetic image sensor, by by the sense magnetic chip of volume very little according to
On secondary arrangement circuit base plate, and signal processing chip, shape will be integrated into the circuit that is handled of sense magnetic chip output signal
Simple magnetic image sensor of low cost is used into a kind of.Sense magnetic core in magnetic image sensor provided in an embodiment of the present invention
Piece is spaced, and multiple sense magnetic chips are connected by mode in parallel after first connecting, and makes with every length scanned all the way to become larger.
Both signal way to be processed had so been reduced, has greatly reduced the difficulty of data post processing and the cost of post-processing, and can
To ensure in the range of effective scanning, magnetic chip all thoughts magnetic responses, not missing inspection are felt.
The above is only the preferred embodiment of the application, it is noted that for the ordinary skill people of the art
For member, on the premise of the application principle is not departed from, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as the protection domain of the application.
Claims (10)
- A kind of 1. magnetic image sensor, it is characterised in that including：Permanent magnet, for producing magnetic field；At least one sense magnetic chip group, each multiple sense magnetic chips felt magnetic chip group and include connecting are each to feel the equal position of magnetic chip Electric signal is converted in the magnetic field that the permanent magnet produces and by the magnetic field each sensed；Signal processing chip, is connected with least one sense magnetic chip group, for receiving at least one sense magnetic chip The electric signal of group；Interface module, is connected with the signal processing chip, for exporting the electric signal of the signal processing chip output.
- 2. magnetic image sensor according to claim 1, it is characterised in that at least one sense magnetic chip component is extremely Few sense magnetic chip group unit, it is each to feel multiple sense magnetic chips of the magnetic chip group unit including a sense magnetic chip group or parallel connection Group, the signal processing chip include at least one input terminal and an output terminal, each input terminal and a sense magnetic chip group Unit connects, and the output terminal is connected with the interface module, and the signal processing chip is used for will be described at least one defeated Enter to terminate received electric signal to be sequentially output to the interface module.
- 3. magnetic image sensor according to claim 2, it is characterised in that the signal processing chip further includes clock letter Number end, the clock signal terminal are used to receive clock signal, and the signal processing chip is used for by clock signal triggering simultaneously The electric signal that at least one input terminal receives is sequentially output by the output terminal.
- 4. magnetic image sensor according to claim 2, it is characterised in that the magnetic image sensor further includes：Differential amplifier circuit, is connected between the signal processing chip and the interface module, for the signal processing The electric signal of the output terminal output of chip carries out differential amplification.
- 5. magnetic image sensor according to claim 4, it is characterised in that the input anode of the differential amplifier circuit It is connected with the output terminal of the signal processing chip, the input cathode of the differential amplifier circuit is connected with reference voltage Connect, the output terminal of the differential amplifier circuit is connected with the input terminal of the interface module.
- 6. magnetic image sensor according to claim 1, it is characterised in that multiple sense magnetic chips of each sense magnetic chip group It is spaced along preset direction.
- 7. magnetic image sensor as claimed in any of claims 1 to 6, it is characterised in that the magnetic image sensing Device further includes：Framework, the permanent magnet are installed in the framework；First line substrate, at least one sense magnetic chip group and the signal processing chip are arranged on the First Line roadbed The side of plate, the framework are arranged on the opposite side of the first line substrate.
- 8. magnetic image sensor according to claim 7, it is characterised in that the magnetic image sensor further includes：At least a piece of protective layer, is covered in the outside of at least one sense magnetic chip group and/or the signal processing chip.
- 9. magnetic image sensor according to claim 8, it is characterised in that the magnetic image sensor further includes：Cover sheet, is located at the top of the first line substrate, for covering the chip on the first line substrate.
- 10. magnetic image sensor according to claim 7, it is characterised in that the magnetic image sensor further includes：Second circuit base plate, side of the framework away from the first line substrate are arranged on the one of second circuit base plate Side, the interface module are arranged on the opposite side of second circuit base plate；Signal connecting line, for connecting the signal processing chip and the interface module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711326812.5A CN107993333A (en) | 2017-12-12 | 2017-12-12 | Magnetic image sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711326812.5A CN107993333A (en) | 2017-12-12 | 2017-12-12 | Magnetic image sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107993333A true CN107993333A (en) | 2018-05-04 |
Family
ID=62037742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711326812.5A Pending CN107993333A (en) | 2017-12-12 | 2017-12-12 | Magnetic image sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107993333A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109523686A (en) * | 2018-11-29 | 2019-03-26 | 威海华菱光电股份有限公司 | Imaging sensor |
| CN109559422A (en) * | 2018-11-22 | 2019-04-02 | 威海华菱光电股份有限公司 | Signal processing method, device, storage medium and the processor of magnetic image sensor |
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| CN207529453U (en) * | 2017-12-12 | 2018-06-22 | 威海华菱光电股份有限公司 | Magnetic image sensor |
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Application publication date: 20180504 |