CN104123518B - A kind of audio frequency based on optimization antenna is non-to connect card reader and its implementation - Google Patents
A kind of audio frequency based on optimization antenna is non-to connect card reader and its implementation Download PDFInfo
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- CN104123518B CN104123518B CN201410323467.XA CN201410323467A CN104123518B CN 104123518 B CN104123518 B CN 104123518B CN 201410323467 A CN201410323467 A CN 201410323467A CN 104123518 B CN104123518 B CN 104123518B
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Abstract
The invention discloses a kind of connect card reader and its implementation based on the audio frequency for optimizing antenna is non-, card reader includes data processing module, antenna and matching module, power supply and audio interface, by the operation of smart mobile phone during use, need to data to be processed data processing module is transferred to by audio interface, the radiofrequency signal that data signal is converted into carrier modulation, then neighbouring space is transmitted into by matching module and antenna；Label is received radiofrequency signal and is emitted the data of storage by label antenna, and card reader antenna receives the radiofrequency signal that label sends and passes to signal processing module, signal processing module；The radiofrequency signal received by antenna is processed, and is input in smart mobile phone by audio interface after radiofrequency signal is demodulated, complete Card Reader process.This programme can realize common smart mobile phone can reading electronic labels, and scheme is simple, be easily achieved.
Description
Technical field
The present invention relates to a kind of RFID technology of Internet of things, and in particular to the technology of digital independent in technology of Internet of things.
Background technology
In today's society, as fake and forged is becoming increasingly rampant, businessman is suffered damage with the interests of consumer, RFID Internet of Things
Network technology arises at the historic moment.With flourishing for RFID technology of Internet of things, electronic tag has progressively been incorporated in daily life.
The trace of electronic tag can be found from food to household electrical appliances.But as existing most of mobile phone is all without NFC function, consumer
Even if seeing electronic tag also cannot read its corresponding product information from electronic tag.So as to cause electronic tag just as
Illusory, do not have practical significance.
In how realizing to electronic tag on the mobile phone without NFC function as can be seen here the reading of data be this area urgently
The problem for needing to solve.
Content of the invention
Information cannot ask in reading electronic labels for the existing common smart mobile phone for not carrying NFC card-reading functions
Topic, it is an object of the invention to provide a kind of connect card reader based on the audio frequency for optimizing antenna is non-, which passes through standard audio mouth by electricity
The data transfer of subtab is to mobile phone so that common smart mobile phone being capable of reading electronic labels.
Card reader is connect based on the audio frequency is non-, the present invention also provides a kind of audio frequency the non-implementation method for connecing card reader.
In order to achieve the above object, the present invention is adopted the following technical scheme that：
A kind of audio frequency based on optimization antenna is non-to connect card reader, and the non-card reader that connects of the audio frequency includes：
Audio interface, the audio interface are corresponding with the audio interface of mobile phone；
Data signal processing module, the data signal processing module are connected with audio interface, and are connected by matching module
Antenna is connected to, will receive data signal carries out conversion process with radiofrequency signal；
Antenna, the antenna are connected with matching module, and are coupled with electronic tag；
Power supply, the power supply offer audio frequency is non-to connect power supply needed for card reader work.
In the non-preferred version for connecing card reader of the audio frequency, the audio interface is tetra- line audio interface of standard 3.5mm.
Further, the data signal processing module uses MFRC522 chip modules, and which mates dual high frequency cross-pair
Claim antenna, antenna is exported with double energy.
Further, the antenna is flexible double high frequency antenna, and size is 8mm × 35mm, and operating frequency is
13.56MHz.
Further, the flexible double high frequency antenna is formed by two groups of antennas are nested against one another, and the electricity of two groups of antennas
Sensibility reciprocal is equal and opposite in phase.
Further, in the flexible double high frequency antenna, through hole is concentrated and is symmetrically distributed in central symmetry axis both sides.
Further, the matching module includes antenna match resonance circuit, and the antenna match resonance circuit is humorous by two
Shake and unit connect to be formed, each resonant element includes that an adjustment resistance, the first die terminals resonance matching capacitance, the second die terminals are humorous
Shake matching capacitance, a signal coupled capacitor, an antenna end resonance matching capacitance and an inductance, and the adjustment resistance connects respectively
It is connected to one end of the first die terminals resonance matching capacitance, the second die terminals resonance matching capacitance and signal coupled capacitor, first
Die terminals resonance matching capacitance, the other end ground connection of the second die terminals resonance matching capacitance, the other end of signal coupled capacitor connect
It is connected to one end of inductance and antenna end resonance matching capacitance, the other end ground connection of antenna end resonance matching capacitance, the second die terminals
Resonance matching capacitance forms a π type capacitor strap pass filtering unit again with signal coupled capacitor, antenna end resonance matching capacitance.
Non- connecing card reader based on above-mentioned audio frequency, a kind of of present invention offer connects card reader based on the audio frequency for optimizing antenna is non-
Implementation method, operation of the implementation method by smart mobile phone, it would be desirable to which the data of process are transferred to number by audio interface
According to signal processing module, the radiofrequency signal that data signal is converted into carrier modulation, then it is transmitted into by matching module and antenna
Neighbouring space；
Label is received radiofrequency signal and is emitted the data of storage by label antenna, and card reader antenna is received
Radiofrequency signal that label sends simultaneously passes to data signal processing module, by the data signal processing module radio frequency received by antenna
Signal demodulation is converted into digital signal, and is input in smart mobile phone by audio interface, completes Card Reader process.
Have in the common smart mobile phone for enabling to do not carry NFC card-reading functions by the scheme that the present invention is provided and penetrate
Frequency chip read functions, being capable of reading electronic labels.The enforcement of whole scheme also has the advantage that：
(1) data processing module can farthest be such that the function of dual antenna farthest embodies.
(2) antenna adopts dual high frequency antenna, and the inductance value of antenna is equal and opposite in phase, have an advantage in that compare single
Antenna has double energy output.
(3) antenna size belongs to miniature antenna, can effectively reduce the volume of card reader.
(4) antenna is made using flexible material, is damaged the reason for can conveniently install, and efficiently reduce stress.
(5) through hole of antenna concentrates on central symmetry axis both sides, can farthest improve the remote of long narrow square antenna
End radio-frequency performance.
(6) two-layer antenna is nested against one another, can farthest ensure that the magnetic line of force distribution of 2 layers of antenna is more uniform.
(7) power supply is powered using compact lithium cell, enables a device to, using independent power supply, no longer additionally consume mobile phone and set
Stand-by power source.
Description of the drawings
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is the circuit theory diagrams of antenna match resonance circuit in the present invention；
Fig. 2 is the schematic wiring diagram of antenna in the present invention；
Fig. 3 is the through hole schematic diagram in the present invention on antenna.
Specific embodiment
In order that technological means, creation characteristic, reached purpose and effect that the present invention is realized are easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is expanded on further.
The non-of present invention offer connects read write line, and which passes through standard audio mouth and is external in mobile phone, by the electronic tag for getting
Data mobile phone is transferred to by audio interface so that common smart mobile phone being capable of reading electronic labels.Due to card reader
Need to coordinate mobile phone to use, its overall structure must be compact, to realize the miniature of card reader, it is desirable to realize miniature non-connecing Card Reader
Device, the design of its antenna are particularly important, should realize the installation of antenna in very narrow space, obtain good antenna again
Performance, this needs meet this double requirements from design.
Based on above-mentioned principle and requirement, present invention offer is a kind of to connect card reader based on the micro audio for optimizing antenna is non-, should
The non-card reader that connects of micro audio includes：Audio interface, data signal processing module, matching module, antenna and power supply.
Audio interface, its are used for realizing the non-data communication for connecing card reader and mobile phone of micro audio.The audio interface is adopted
3.5mm Universal audio interfaces, i.e., common mobile audio interface can so be realized and have tetra- line audio frequency of standard 3.5mm and connect
Any mobile phone of mouth carries out communication and connects, and thereby guarantees that the non-practicality for connecing card reader of the micro audio.
Data signal processing module is the non-data signal processing center connect in card reader of micro audio, its data terminal connection
To audio interface, signal end is connected to antenna by matching module, realizes the real-time conversion between data signal and radiofrequency signal
Process.
The data signal processing module specifically adopts MFRC522 chip modules, and the MFRC522 chip modules are double by coupling
Weight high frequency crossed-symmetrical antenna, makes up the shortcoming that dual high frequency crossed-symmetrical antenna cancels each other, and enables the antenna to play double
Energy output.
Antenna, its are used for coupling with electronic tag, send radiofrequency signal to electronic tag and receive electronic tag feedback
Signal.In order to ensure with good signal and coordinate with MFRC522 chip modules, the antenna in the present invention is specially flexibility
Dual high frequency crossed-symmetrical antenna,, for individual antenna, output energy is big for which, and when antenna matching network reaches most preferably
Double energy output can be obtained during coupling.
In order to the installation of antenna is realized in very narrow space, obtain good antenna performance, again referring to figure
2, the flexible double high frequency crossed-symmetrical antenna is nested against one another by two-layer antenna and is formed, and two groups of antennas inductance value equal and
Opposite in phase, is consequently formed the miniature antenna that size belongs to miniature, and optimal size size is 8mm × 35mm, and its operating frequency is (humorous
Vibration frequency) it is 13.56MHz, overall using flexible material making, concrete using the making of polyimide flex material.
Referring to Fig. 3, the flexible double high frequency crossed-symmetrical antenna being consequently formed its through hole is concentrated and is symmetrically distributed in center pair
Claim axle both sides, and relative distance outwards gradually decreased by inner side, thus make length of antenna side two ends obtain maximum density of line of magnetic force,
Increase effective communication distance.
In order to well flexible double high frequency crossed-symmetrical antenna is mated with MFRC522 chip modules, this
In invention, matching module is mainly made up of an antenna match resonance circuit.
Referring to Fig. 1, which show the circuit theory diagrams of antenna match resonance circuit in the present invention.The antenna as seen from the figure
With resonance circuit mainly by resistance R24, R23, electric capacity C11, C13, C15, C17, C12, C14, C16, C18, inductance L2, L3 and
Plug-in unit J3 is constituted.
Wherein, plug-in unit J3 is used for connecting antenna, and one end of resistance R24 is connected to the port 3 of plug-in unit J3, and the other end connects respectively
One end of electric capacity C11, C13, C15 is connected to, electric capacity C11, C13 other end is grounded, one end of another termination inductance L2 of electric capacity C15
And one end of electric capacity C17, the other end ground connection of electric capacity C17, the other end of inductance L2 is used as signal end TX1；
One end of resistance R23 is connected to the port 1 of plug-in unit J3, and the other end is connected respectively to the one of electric capacity C12, C14, C16
End, electric capacity C12, C14 other end are grounded, one end and one end of electric capacity C18 of another termination inductance L3 of electric capacity C16, electric capacity
The other end ground connection of C18, the other end of inductance L3 is used as signal end TX2；
The port 2 of plug-in unit J3 is grounded.
In above-mentioned antenna match resonance circuit, resistance R24 is matched somebody with somebody with electric capacity C11, C13, C15, C17 and inductance L2
Close and constitute a resonant element A；And resistance R23, coordinate with electric capacity C12, C14, C16, C18 and inductance L3 and constitute a resonance list
First B, this resonant element correspond respectively to two groups of antennas in double cross symmetrical antenna.
Due to correspond to double cross symmetrical antenna, therefore in antenna match resonance circuit two resonant element functions, performance with
And parameters are identical, this antenna match resonance circuit is illustrated below by taking resonant element A as an example.
In resonant element A, the effect of resistance R24 is to adjust antenna Q-value；
Electric capacity C11, C13 are die terminals resonance matching capacitance, can adjust output and mate with the resonance of input resonant circuit
Degree, electric capacity C11 are coarse adjustment matching capacitance, and capacity is 100PF, electric capacity C13 accurate adjustment matching capacitances, and capacity is 39PF；
Radiofrequency signal is transferred to rear class from prime for signal coupled capacitor by electric capacity C15, has isolated DC component, capacity again
For 39PF；
Electric capacity C17 is antenna end resonance matching capacitance, and capacity is 68PF；
Electric capacity C13, C15, C17 form a π type electric capacity bandwidth-limited circuit again, obtain the useful frequency range of radiofrequency signal
Transmission, invalid signal is isolated or is bypassed；
Inductance L2 is used for shielding too high wave band, and compensates the deficiency of the inductance value of miniature antenna, is formed antenna end
Effective series resonant tank, its inductance value are 2.2uH；The single group antenna number of turn is 6 circles, and inductance value is 2uH.
Due to corresponding to double cross symmetrical antenna, two resonant elements of antenna match resonance circuit are identical, therefore resistance
R23, electric capacity C12, C14, C16, C18 and inductance L3 respectively with resistance R24, electric capacity C11, C13, C15, C17 and inductance
L2 function phases are with parameter is consistent.
Power supply adopts compact lithium cell to power for the part in whole card reader so that card reader can use independent electricity
Source, does not consume cell phone apparatus power supply extra.
According to the audio frequency non-contact reader that such scheme is constituted, which passes through intelligence when using cooperatively, first with mobile phone
The operation of mobile phone, it would be desirable to which the data of process are transferred to data signal processing module by audio interface, and data signal is changed
Into the radiofrequency signal of carrier modulation, then neighbouring space is transmitted into by matching module and antenna；
Label is received radiofrequency signal and is emitted the data of storage by label antenna, and card reader antenna is received
Radiofrequency signal that label sends simultaneously passes to data signal processing module, by the data signal processing module radio frequency received by antenna
Signal demodulation is converted into digital signal, and is input in smart mobile phone by audio interface, completes Card Reader process.
Ultimate principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not restricted to the described embodiments, simply explanation described in above-described embodiment and description this
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes
Change and improvement is both fallen within scope of the claimed invention.The claimed scope of the invention by appending claims and its
Equivalent thereof.
Claims (7)
1. a kind of audio frequency based on optimization antenna is non-connects card reader, it is characterised in that the non-card reader that connects of the audio frequency includes：
Audio interface, the audio interface are corresponding with the audio interface of mobile phone；
Data signal processing module, the data signal processing module are connected with audio interface, and are connected to by matching module
Antenna, will receive data signal carries out conversion process with radiofrequency signal；The matching module includes antenna match resonance circuit,
The antenna match resonance circuit by two resonant elements and connects and is formed, and each resonant element includes an adjustment resistance, the first chip
End resonance matching capacitance, the second die terminals resonance matching capacitance, a signal coupled capacitor, an antenna end resonance matching capacitance, with
And an inductance, the adjustment resistance is connected respectively to the first die terminals resonance matching capacitance, the second die terminals resonance matching capacitance
And one end of signal coupled capacitor, the first die terminals resonance matching capacitance, the other end of the second die terminals resonance matching capacitance
Ground connection, the other end of signal coupled capacitor are connected to one end of inductance and antenna end resonance matching capacitance, and antenna end resonance mates
The other end ground connection of electric capacity, the second die terminals resonance matching capacitance and signal coupled capacitor, antenna end resonance matching capacitance and shape
Into a π type capacitor strap pass filtering unit；
Antenna, the antenna are connected with matching module, and are coupled with electronic tag；
Power supply, the power supply offer audio frequency is non-to connect power supply needed for card reader work.
2. a kind of audio frequency based on optimization antenna according to claim 1 is non-connects card reader, it is characterised in that the audio frequency
Interface is tetra- line audio interface of standard 3.5mm.
3. a kind of audio frequency based on optimization antenna according to claim 1 is non-connects card reader, it is characterised in that the data
Signal processing module uses MFRC522 chip modules, and which mates dual high frequency crossed-symmetrical antenna, makes antenna with double energy
Output.
4. a kind of audio frequency based on optimization antenna according to claim 1 is non-connects card reader, it is characterised in that the antenna
For flexible double high frequency antenna, size is 8mm × 35mm, and operating frequency is 13.56MHz.
5. a kind of audio frequency based on optimization antenna according to claim 4 is non-connects card reader, it is characterised in that the flexibility
Dual high frequency antenna is formed by two groups of antennas are nested against one another, and two groups of antennas inductance value is equal and opposite in phase.
6. a kind of audio frequency based on optimization antenna according to claim 5 is non-connects card reader, it is characterised in that the flexibility
In dual high frequency antenna, through hole is concentrated and is symmetrically distributed in central symmetry axis both sides.
7. the non-implementation method for connecing card reader of audio frequency any one of a kind of claim 1-6, it is characterised in that described
Operation of the implementation method by smart mobile phone, it would be desirable to which the data of process are transferred to data signal by audio interface and process mould
Block, the radiofrequency signal that data signal is converted into carrier modulation, then neighbouring space is transmitted into by matching module and antenna；
Label is received radiofrequency signal and is emitted the data of storage by label antenna, and card reader antenna receives label
The radiofrequency signal that sends simultaneously passes to data signal processing module, by the data signal processing module radiofrequency signal received by antenna
Demodulation is converted into digital signal, and is input in smart mobile phone by audio interface, completes Card Reader process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410323467.XA CN104123518B (en) | 2014-07-08 | 2014-07-08 | A kind of audio frequency based on optimization antenna is non-to connect card reader and its implementation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410323467.XA CN104123518B (en) | 2014-07-08 | 2014-07-08 | A kind of audio frequency based on optimization antenna is non-to connect card reader and its implementation |
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| CN104123518B true CN104123518B (en) | 2017-03-15 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102523092A (en) * | 2011-12-05 | 2012-06-27 | 上海柯斯软件有限公司 | Audio-based non-contact integrated circuit (IC) card and mobile authentication data transmission device |
| CN103138929A (en) * | 2011-12-05 | 2013-06-05 | 赛酷特(北京)信息技术有限公司 | Contactless smart card cellphone authentication equipment based on audio interface |
| CN203025720U (en) * | 2012-12-30 | 2013-06-26 | 北京握奇数据系统有限公司 | Card reading device based on audio interface |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101140919B1 (en) * | 2011-08-20 | 2012-05-03 | 허인구 | A multi-card reader device using a mobile, and the method therefor |
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- 2014-07-08 CN CN201410323467.XA patent/CN104123518B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102523092A (en) * | 2011-12-05 | 2012-06-27 | 上海柯斯软件有限公司 | Audio-based non-contact integrated circuit (IC) card and mobile authentication data transmission device |
| CN103138929A (en) * | 2011-12-05 | 2013-06-05 | 赛酷特(北京)信息技术有限公司 | Contactless smart card cellphone authentication equipment based on audio interface |
| CN203025720U (en) * | 2012-12-30 | 2013-06-26 | 北京握奇数据系统有限公司 | Card reading device based on audio interface |
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