CN107886614A - Magnetism sensor - Google Patents
Magnetism sensor Download PDFInfo
- Publication number
- CN107886614A CN107886614A CN201711221434.4A CN201711221434A CN107886614A CN 107886614 A CN107886614 A CN 107886614A CN 201711221434 A CN201711221434 A CN 201711221434A CN 107886614 A CN107886614 A CN 107886614A
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- signal processing
- magnetism sensor
- signal
- processing chip
- sense magnetic
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- 230000005389 magnetism Effects 0.000 title claims abstract description 81
- 238000012545 processing Methods 0.000 claims description 71
- 239000000758 substrate Substances 0.000 claims description 35
- 239000011241 protective layer Substances 0.000 claims description 10
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 238000007688 edging Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 description 5
- 230000032258 transport Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001960 triggered 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
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The invention discloses a kind of magnetism sensor.Wherein, the magnetism sensor senses magnetism using multiple relative to the sense magnetic chip of magnetic head small volume, the volume of magnetism sensor can be reduced, the number of sense magnetic chip can also be selected according to resolution requirements, while resolution requirements are met, moreover it is possible to ensure that the volume of magnetism sensor is not excessive.The present invention solves the excessive technical problem of magnetism sensor bulk of correlation technique middle high-resolution.
Description
Technical field
The present invention relates to sensor field, in particular to a kind of magnetism sensor.
Background technology
Magnetism sensor is a kind of sensor that can sense magnetic signal, can be applied in paper money discrimination field, paper money counter,
Cash inspecting machine, cleaning-sorting machine etc. can be differentiated by magnetism to forge or true or paper money, therefore, detection performance of the magnetism sensor to magnetic signal
It is particularly important.
Existing magnetism sensor is mostly single magnetic head sensor, or the low resolution formed by the arrangement of multiple single magnetic heads is more
Magnetic head sensor, because the volume of magnetic head in itself is larger, along with multihead sensor signal processing circuit (be used for pair
The circuit that multihead output signal is handled, the corresponding signal processing circuit of each magnetic head), cause the body of magnetism sensor
Product is huge, if it is desired to realizes high-resolution detection, then the volume of magnetism sensor can be made excessive, it is difficult to realize high-resolution
Change, high resolution scanning can not be carried out to magnetism original copy, the presence or absence of magnetism on bank note can only be detected.
For the excessive technical problem of the magnetism sensor bulk of correlation technique middle high-resolution, not yet propose at present effective
Solution.
The content of the invention
The embodiments of the invention provide a kind of magnetism sensor, at least to solve the magnetism of correlation technique middle high-resolution biography
The excessive technical problem of sensor volume.
One side according to embodiments of the present invention, there is provided a kind of magnetism sensor, the magnetism sensor include：Permanent magnetism
Body, for producing magnetic field；Multiple sense magnetic chips, multiple sense magnetic chips are set gradually along predetermined direction, each to feel the equal position of magnetic chip
In being converted to electric signal caused by permanent magnet in magnetic field and by the magnetic field each sensed；Interface module, with multiple sense magnetic chips
It is all connected with, the electric signal changed for exporting each sense magnetic chip.
Further, magnetism sensor also includes：Signal processing chip, including multiple inputs, an output end and one
Individual clock signal terminal, multiple inputs of signal processing chip are connected one to one with multiple sense magnetic chips, and each input is used
In the electric signal that sense magnetic chip corresponding to reception is changed, the clock signal terminal of signal processing chip is used to receive clock signal,
The output end of signal processing chip is connected with interface module, and signal processing chip is used at least meet by clock by output end
The electric signal that multiple sense magnetic chips are changed is sequentially output under conditions of the edging trigger of signal.
Further, magnetism sensor also includes：Difference amplifier, be connected to signal processing chip and interface module it
Between, the electric signal for the output end output to signal processing chip carries out differential amplification.
Further, difference amplifier includes first input end and the second input, wherein, at first input end and signal
The output end of reason chip is connected, and the second input is connected with reference voltage, wherein, reference voltage is burning voltage signal,
Or the voltage signal after changing inversely is carried out for the electric signal of the output end output of signal processing chip, or, with reference to electricity
After the electric signal for pressing the output end for signal processing chip to export is corrected by correcting circuit according to temperature and/or humidity
Electric signal.
Further, magnetism sensor also includes：Substrate, permanent magnet are arranged on the side of substrate, and multiple sense magnetic chips are set
Put the opposite side in substrate.
Further, magnetism sensor also includes：Metallic plate, it is arranged between permanent magnet and substrate, for homogenizing forever
Magnetic field caused by magnet.
Further, magnetism sensor also includes：Framework, it is arranged on side of the substrate away from multiple sense magnetic chips, permanent magnetism
Body and metallic plate are installed on framework.
Further, magnetism sensor also includes：Signal processing chip, it is arranged on where multiple sense magnetic chips of substrate
Side, signal processing chip include multiple inputs, an output end and a clock signal terminal, signal processing chip it is multiple
Input connects one to one with multiple sense magnetic chips, and each input is used to receive the telecommunications that corresponding sense magnetic chip is changed
Number, the clock signal terminal of signal processing chip is used to receive clock signal, and output end and the interface module of signal processing chip connect
Connect, signal processing chip, which is used for subject clock signal, to be triggered and be sequentially output multiple telecommunications felt magnetic chips and changed by output end
Number.
Further, signal processing chip and substrate connection, it is provided with the outside of signal processing chip for covering signal
The protective layer of process chip.
Further, each feel magnetic chip and substrate connection, be provided with the outside of each sense magnetic chip for covering correspondingly
Feel the protective layer of magnetic chip.
Further, magnetism sensor also includes：Protection board, the side being located at where multiple sense magnetic chips of substrate,
To cover the component on the side where multiple sense magnetic chips of substrate.
In embodiments of the present invention, magnetism is sensed relative to the sense magnetic chip of magnetic head small volume by using multiple,
The volume of magnetism sensor can be reduced, additionally it is possible to the number of sense magnetic chip is selected according to resolution requirements, is meeting to differentiate
While rate demand, moreover it is possible to ensure that the volume of magnetism sensor is not excessive, the magnetism for solving correlation technique middle high-resolution passes
The excessive technical problem of sensor volume, and then realize the technique effect for the volume that can reduce magnetism sensor.
Brief description of the drawings
Accompanying 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 sectional drawing of optional magnetism sensor according to embodiments of the present invention；
Fig. 2 is a kind of top view of optional magnetism sensor according to embodiments of the present invention；
Fig. 3 is a kind of circuit theory schematic diagram of optional magnetism sensor according to embodiments of the present invention.
Embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, it 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 accompanying 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 embodiments of the 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 magnetism sensor.
Fig. 1 is a kind of sectional drawing of optional magnetism sensor according to embodiments of the present invention, as shown in figure 1, magnetism passes
Sensor includes permanent magnet 2, multiple sense magnetic chips 5 and interface module 10.Permanent magnet 2 is used to produce magnetic field.Multiple sense magnetic chip 5 edges
Predetermined direction is set gradually, and each sense magnetic chip is respectively positioned on caused by permanent magnet in magnetic field and changes the magnetic field each sensed
For electric signal.Interface module 10 is all connected with multiple sense magnetic chips 5, and interface module 10 is changed for exporting each sense magnetic chip
Electric signal.
As shown in figure 1, the magnetism sensor that the embodiment provides also includes substrate 4, optionally, substrate 4 can be PCB
(circuit board), permanent magnet 2 are arranged on the side of substrate 4, and multiple sense magnetic chips 5 are arranged on the opposite side of substrate.Due to feeling magnetic core
Piece volume very little, thus, it is possible to be substantially reduced the volume of magnetism sensor.
Further, the magnetism sensor that the embodiment provides also includes signal processing chip 7, and signal processing chip 7 wraps
Transfer function containing logic with shift, signal processing chip 7 include multiple inputs, an output end and a clock signal terminal, letter
Multiple inputs of number process chip 7 connect one to one with multiple sense magnetic chips 5, and each input is used to receive corresponding sense
The electric signal that magnetic chip is changed, the clock signal terminal of signal processing chip 7 are used to receive clock signal, signal processing chip 7
Output end be connected with interface module 10, signal processing chip 7 is used for the triggering output electric signal of subject clock signal etc., it is specific and
Speech, signal processing chip 7 are used to be sequentially output under conditions of the edging trigger of subject clock signal is at least met by output end
Multiple electric signals for being changed of sense magnetic chips 5, for example, can export multiple sense magnetic chips 5 receiving for instruction and changed
Electric signal in the case of, often receive a clock edges, can all trigger output one electric signal, electric signal output
Order can be predetermined.It is connected due to use only a signal processing chip with all sense magnetic chips, thus, energy
Enough it is substantially reduced the volume of magnetism sensor.
Further, the magnetism sensor that the embodiment provides also includes difference amplifier 9, and difference amplifier 9 is connected to
Between signal processing chip 7 and interface module 10, the electric signal for the output end output to signal processing chip 7 carries out difference
Amplification.The electric signal (magnetism signal) and reference electricity that differential amplifier circuit 9 can export the output end of signal processing chip 7
Press signal carry out differential amplification, stablize and signal amplitude amplify magnetism signal.
Further, difference amplifier 9 includes first input end and the second input, wherein, first input end and signal
The output end of process chip 7 is connected, and the second input is connected with reference voltage, wherein, reference voltage is believed for burning voltage
Number, or, it is that the electric signal of the output end output of signal processing chip carries out the voltage signal after changing inversely, or, ginseng
Examine the electric signal that the output end that voltage is signal processing chip 7 exports and school is carried out according to temperature and/or humidity by correcting circuit
Electric signal after just.
Fig. 2 is the top view for the magnetism sensor that the embodiment provides, as shown in Fig. 2 multiple sense magnetic chips 5 are included successively
The sense magnetic chip 51 of splicing, 52,53,54,55 ... 5n-4,5n-3,5n-2,5n-1,5n, it is multiple sense magnetic chips 5 be arranged on base
On plate 4, multiple sense magnetic chips 5 are connected with signal processing chip 7, and each input pin of signal processing chip 7 and a row feel
The output of each sense magnetic chip of magnetic chip is connected one to one, and signal processing chip 7 is connected with difference amplifier 9, and difference is put
Big device 9 is located near the output end of signal processing chip 7.The signal processing chip 7 for the magnetism sensor that the embodiment provides is set
Put the side where multiple sense magnetic chips 5 in substrate 4.The magnetism sensor that the embodiment provides accumulates very little by an isostere
Feel magnetic chip and highly integrated signal processing chip 7, and a difference amplifier 9, substantially reduce the number of the upper-part of substrate 4
Amount and volume, the high resolution of magnetism sensor in limited small product size, can be realized.
Further, as shown in figure 1, the magnetism sensor that the embodiment provides also includes metallic plate 3, metallic plate 3 is set
Between permanent magnet 2 and substrate 4, metallic plate 3 is used to homogenize magnetic field caused by permanent magnet 2.It should be noted that metallic plate 3
The material that can be magnetized must be used.
Further, as shown in figure 1, the magnetism sensor that the embodiment provides also includes framework 1, framework 1 is arranged on base
The side of remote multiple sense magnetic chips 5 of plate 4, permanent magnet 2 and metallic plate 3 are installed on framework 1.
Further, as shown in figure 1, signal processing chip 7 is connected with substrate 4, signal processing chip 7 does not connect with substrate 4
The outside connect is provided with the protective layer 8 for covering signal processing chip 7.
Further, as shown in figure 1, each sense magnetic chip is connected with substrate 4, each sense magnetic chip is not connected with substrate 4
Outside be provided with protective layer 6 for covering corresponding sense magnetic chip.
Optionally, the protective layer that the magnetism sensor that the embodiment provides uses is high intensity and ultra-thin protective layer.
Further, as shown in figure 1, the magnetism sensor that the embodiment provides also includes protection board 11, protection board 11 covers
The side being located at where multiple sense magnetic chips 5 of substrate 4, to cover the member on the side where multiple sense magnetic chips 5 of substrate 4
Device, component comprise at least multiple sense magnetic chips 5, the protective layer 6 of each sense magnetic chip of covering, signal processing chip 7, covering
The protective layer 8 and difference amplifier 9 of signal processing chip 7.Protection board 11 is additionally operable to the effect of support transmission original copy, while can
Multiple sense magnetic chips 5 and signal processing chip 7, protection board 11 are protected to use thickness of thin, and the high-abrasive material that intensity is high.
Interface module 10 can be arranged on the lower surface of substrate 4, as shown in figure 1, interface module 4 can be socket, used
In as the signal connector part with external device communication.
The magnetism sensor that the embodiment provides can realize high-resolution scanning by multiple sense magnetic chips 5, feel magnetic
The quantity and spacing of chip can be configured according to the needs of high resolution scanning, such as be arranged to 50DPI or 100DPI,
The volume of magnetism sensor can also be reduced simultaneously.
The magnetism sensor that the embodiment provides is provided with the sense magnetic chip and signal of isostere product very little in the upper surface of substrate 4
Process chip 7, the output of multiple sense magnetic chips 5 are connected to the input of the logic with shift transmission control circuit in signal processing chip 7
Hold, after the shifted logical transport control circuit shift transports of output of multiple sense magnetic chips 5, be connected to the defeated of difference amplifier 9
Enter proper pole, the input cathode connection reference voltage (reference voltage) of difference amplifier 9, the sense magnetic chip letter after differential amplification
Number through interface module 10 (socket) export.
Fig. 3 is the circuit theory diagrams for the magnetism sensor that can realize high resolution scanning that the embodiment provides, and n is felt
The output of magnetic chip (51~5n of sense magnetic chip) is connected to the corresponding defeated of the logical transport control circuit in signal processing chip 7
Enter on end, the clock signal terminal of signal processing chip 7 receives clock signal clk, and another input of signal processing chip 7 is used for
Row enabling signal SI is received, wherein, in the case where receiving row enabling signal SI, signal processing chip 7 can just export electricity
Signal, that is, it is the necessary condition for exporting electric signal to receive row enabling signal SI.The output of signal processing chip 7 is connected to
The input anode of difference amplifier 9, reference voltage are connected to the input cathode of difference amplifier 9, each sense magnetic chip
Output signal is gated and exported by logical transport control circuit, and the signal of multiple sense magnetic chips is used as signal processing chip successively
7 output.The amplified output ends by difference amplifier 9 of output signal SIG of signal processing chip 7 export, at signal
The output of each sense magnetic chip can be transmitted out by reason chip 7 successively, and output signal line only has one, output signal quantity
It is few, it is easy to handle.
The control signal for the magnetism sensor that the embodiment provides, only need to be to letter without being controlled to each sense magnetic chip
Number process chip 7 is controlled, and control signal quantity is few, and control method is simple.And it can be controlled by signal processing chip 7
The output transmission of each sense magnetic chip, the small volume of signal processing chip 7, in limited small product size, it is possible to achieve magnetism passes
The high resolution of sensor.
Described 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 (11)
- A kind of 1. magnetism sensor, it is characterised in that including：Permanent magnet, for producing magnetic field；Multiple sense magnetic chips, multiple sense magnetic chips are set gradually along predetermined direction, and each sense magnetic chip is respectively positioned on institute State caused by permanent magnet in magnetic field and the magnetic field each sensed is converted into electric signal；Interface module, it is all connected with multiple sense magnetic chips, the electric signal changed for exporting each sense magnetic chip.
- 2. magnetism sensor according to claim 1, it is characterised in that the magnetism sensor also includes：Signal processing chip, including multiple inputs, an output end and a clock signal terminal, the signal processing chip Multiple inputs connect one to one with multiple sense magnetic chips, and each input turns for receiving corresponding sense magnetic chip The electric signal changed, the clock signal terminal of the signal processing chip are used to receiving clock signal, the signal processing chip it is defeated Go out end to be connected with the interface module, the signal processing chip is used at least meet by the clock by the output end The electric signal that multiple sense magnetic chips are changed is sequentially output under conditions of the edging trigger of signal.
- 3. magnetism sensor according to claim 2, it is characterised in that the magnetism sensor also includes：Difference amplifier, it is connected between the signal processing chip and the interface module, for the signal transacting core The electric signal of the output end output of piece carries out differential amplification.
- 4. magnetism sensor according to claim 3, it is characterised in that the difference amplifier include first input end and Second input, wherein, the first input end is connected with the output end of the signal processing chip, second input It is connected with reference voltage, wherein, the reference voltage is burning voltage signal, or, it is the defeated of the signal processing chip The electric signal for going out end output carries out the voltage signal after changing inversely, or, the reference voltage is the signal transacting core Piece output end output electric signal be corrected by correcting circuit according to temperature and/or humidity after electric signal.
- 5. magnetism sensor according to claim 1, it is characterised in that the magnetism sensor also includes：Substrate, the permanent magnet are arranged on the side of the substrate, and multiple sense magnetic chips are arranged on the another of the substrate Side.
- 6. magnetism sensor according to claim 5, it is characterised in that the magnetism sensor also includes：Metallic plate, it is arranged between the permanent magnet and the substrate, for homogenizing magnetic field caused by the permanent magnet.
- 7. magnetism sensor according to claim 6, it is characterised in that the magnetism sensor also includes：Framework, side of the substrate away from multiple sense magnetic chips is arranged on, the permanent magnet and the metallic plate are pacified Dress is on said frame.
- 8. magnetism sensor according to claim 5, it is characterised in that the magnetism sensor also includes：Signal processing chip, the side being arranged on where multiple sense magnetic chips of the substrate, the signal processing chip Including multiple inputs, an output end and a clock signal terminal, multiple inputs of the signal processing chip with it is multiple The sense magnetic chip connects one to one, and each input is used to receive the electric signal that corresponding sense magnetic chip is changed, described The clock signal terminal of signal processing chip is used to receive clock signal, describedThe output end of signal processing chip is connected with the interface module, and the signal processing chip is used for by the clock signal Trigger and multiple electric signals felt magnetic chips and changed are sequentially output by the output end.
- 9. magnetism sensor according to claim 8, it is characterised in that the signal processing chip connects with the substrate Connect, the protective layer for covering the signal processing chip is provided with the outside of the signal processing chip.
- 10. magnetism sensor according to claim 5, it is characterised in that each sense magnetic chip connects with the substrate Connect, the protective layer for covering corresponding sense magnetic chip is provided with the outside of each sense magnetic chip.
- 11. magnetism sensor according to claim 10, it is characterised in that the magnetism sensor also includes：Protection board, the side being located at where multiple sense magnetic chips of the substrate, to cover multiple institutes of the substrate State sense magnetic chip where side on component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711221434.4A CN107886614A (en) | 2017-11-28 | 2017-11-28 | Magnetism sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711221434.4A CN107886614A (en) | 2017-11-28 | 2017-11-28 | Magnetism sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107886614A true CN107886614A (en) | 2018-04-06 |
Family
ID=61775709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711221434.4A Pending CN107886614A (en) | 2017-11-28 | 2017-11-28 | Magnetism sensor |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011021521A1 (en) * | 2009-08-19 | 2011-02-24 | ローム株式会社 | Magnetic sensor device and electronic equipment using same |
| CN105051500A (en) * | 2013-03-29 | 2015-11-11 | 日本电产三协株式会社 | Magnetism-sensor device |
| CN105488896A (en) * | 2015-12-31 | 2016-04-13 | 威海华菱光电股份有限公司 | Bank note detection apparatus |
| CN106101475A (en) * | 2016-08-11 | 2016-11-09 | 威海华菱光电股份有限公司 | Multifunctional image sensor |
-
2017
- 2017-11-28 CN CN201711221434.4A patent/CN107886614A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011021521A1 (en) * | 2009-08-19 | 2011-02-24 | ローム株式会社 | Magnetic sensor device and electronic equipment using same |
| CN105051500A (en) * | 2013-03-29 | 2015-11-11 | 日本电产三协株式会社 | Magnetism-sensor device |
| CN105488896A (en) * | 2015-12-31 | 2016-04-13 | 威海华菱光电股份有限公司 | Bank note detection apparatus |
| CN106101475A (en) * | 2016-08-11 | 2016-11-09 | 威海华菱光电股份有限公司 | Multifunctional image sensor |
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Application publication date: 20180406 |
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