CN106909865A - Near-field communication front end hardware circuit, terminal, read write line, system and method - Google Patents
Near-field communication front end hardware circuit, terminal, read write line, system and method Download PDFInfo
- Publication number
- CN106909865A CN106909865A CN201710184291.8A CN201710184291A CN106909865A CN 106909865 A CN106909865 A CN 106909865A CN 201710184291 A CN201710184291 A CN 201710184291A CN 106909865 A CN106909865 A CN 106909865A
- Authority
- CN
- China
- Prior art keywords
- field communication
- unit
- modulated signal
- hardware circuit
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004891 communication Methods 0.000 title claims abstract description 199
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 38
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 230000004044 response Effects 0.000 claims description 21
- 238000005070 sampling Methods 0.000 claims description 16
- 230000008859 change Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 7
- 230000006870 function Effects 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000003993 interaction Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000004069 differentiation Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000002452 interceptive effect Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10297—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
- G06K7/10326—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the very-near field type, e.g. capacitive
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
- G06K7/10336—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the near field type, inductive coil
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/77—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for interrogation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electromagnetism (AREA)
- General Health & Medical Sciences (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The present invention is applied to communication technical field, there is provided a kind of near-field communication front end hardware circuit, terminal, read write line, system and method, the near-field communication front end hardware circuit include：Near-field communication aerial, detection unit and communication interface pin units；The near-field communication aerial includes near field coil and matching capacitance, and the frequency of the near field coil is matched with the carrier frequency chosen；The detection unit, for the carrier wave in the modulated signal for filtering reception, obtains former modulated signal, and the detection unit is connected with the near field coil；The communication interface pin units, for the former modulated signal to be exported to micro-control unit, the communication interface pin units are connected between the detection unit and the micro-control unit.By foregoing circuit, power consumption can be greatly reduced.
Description
Technical field
The invention belongs to communication technical field, more particularly to a kind of near-field communication front end hardware circuit, terminal, read write line,
System and method.
Background technology
Near-field communication technology is to recognize (Radio Frequency Identification, RFID) by non-contact radio-frequency
And Technology Integration differentiation of interconnecting, combining induction read write line, icah wavw and point-to-point on one chip
Function, can be identified and data exchange in short distance with compatible equipment.Current this technology is widely used, and such as bank is double
Interface card, novel visual bank card etc..
Current most variations are carried out using near-field communication (Near Field Communication, NFC) chip
Communication, relatively costly, control chip and external reader A interactions are complicated, and power consumption is higher.
The content of the invention
In view of this, a kind of near-field communication front end hardware circuit, terminal, read write line, system be the embodiment of the invention provides
And method, it is relatively costly during solving to be communicated using NFC chip in the prior art, and interaction is complicated, power consumption is higher to ask
Topic.
The first aspect of the embodiment of the present invention, there is provided a kind of near-field communication front end hardware circuit, before the near-field communication
End hardware circuit includes：
Near-field communication aerial, detection unit and communication interface pin units；
The near-field communication aerial includes near field coil and matching capacitance, the frequency of the near field coil and the carrier wave chosen
Frequency is matched；
The detection unit, for the carrier wave in the modulated signal for filtering reception, obtains former modulated signal, the detection list
It is first to be connected with the near field coil；
The communication interface pin units, for the former modulated signal to be exported to micro-control unit, the communication connects
Mouth pin units are connected between the detection unit and the micro-control unit.
With reference in a first aspect, in the first possible implementation of first aspect, the near-field communication front end hardware circuit
Also include：
Rear end matching unit, for the former modulated signal to be made decisions into matching, and passes through institute by the signal after matching
State communication interface pin units to export to the micro-control unit, the rear end matching unit is connected to the detection unit and institute
State between communication interface pin units.
With reference to the first possible implementation of first aspect, second of first aspect may implementation, it is described
Rear end matching unit includes：
The rear end matching unit is to compare judgement unit or AD sampling units.
May be realized with reference to the first possible implementation of first aspect or first aspect or second of first aspect
Mode, in the third possible implementation of first aspect, the near-field communication front end hardware circuit also includes that load modulation is single
Unit；
The load modulating unit, for modulating and sending by controlling the load of near field coil change to carry out load
Modulated signal, the load modulating unit is connected with the detection unit.
It is described in the 4th kind of possible implementation of first aspect with reference to the third possible implementation of first aspect
Load modulating unit includes：
On-off circuit module and load control module；
The first end of the load control module is connected with the detection unit, the second end of the load control module with
The current input terminal connection of the on-off circuit module, the current output terminal ground connection of the on-off circuit module, the switch electricity
First control end, second control end of road module are defeated with the micro-control unit by the communication interface pin units respectively
Enter output interface, the connection of sending signal end.
A kind of second aspect of the embodiment of the present invention, there is provided near-field communication terminal, the front end of the near-field communication terminal
Hardware circuit includes that the first possible implementation of the first aspect, first aspect, second possibility of first aspect are real
Existing mode, the third possible implementation of first aspect, the 4th kind of any one near field of possible implementation of first aspect
Communication front-end hardware circuit.
A kind of third aspect of the embodiment of the present invention, there is provided read write line, the front end hardware circuit of the read write line includes
The first possible implementation of the first aspect, first aspect, second any of possibility implementation of first aspect
Plant near-field communication front end hardware circuit.
A kind of fourth aspect of the embodiment of the present invention, there is provided near field communication system, the near field communication system
System includes the read write line of the near-field communication terminal of second aspect and the third aspect.
A kind of 5th aspect of the embodiment of the present invention, there is provided near field channel radio based on near-field communication front end hardware circuit
Letter method, including：
The modulated signal that read write line sends is received by near-field communication aerial, the near-field communication aerial includes near field coil
And matching capacitance；
The carrier wave of the modulated signal is filtered by detection unit, former modulated signal is obtained；
The former modulated signal is exported to micro-control unit by communication interface pin units.
With reference to the 5th aspect, the first the possible implementation in terms of the 5th is described to pass through the former modulated signal
First communication interface pin is exported to the MCU circuits, including：
The former modulated signal is exported to the matching of rear end matching unit；
Signal after the rear end matching unit is matched is exported to the micro-control by the communication interface pin units
Unit processed.
With reference to the 5th aspect, in second possible implementation of the 5th aspect, the former modulated signal is led to described
Communication interface pin units are crossed to export to micro-control unit, including：
The former modulated signal is responded in the micro-control unit, after producing response signal, according to the response
Signal control load modulating unit, controlling the load of the near field coil to change by the load modulating unit carries out load tune
System；
Response signal after modulation is sent to the read write line.
With reference to the 5th aspect, in the third possible implementation of the 5th aspect, the load modulating unit includes switch
Circuit module, it is described by near-field communication aerial receive read write line send modulated signal when, including：
The on-off circuit module is controlled to be off state, so that less by the electric current of the near-field communication aerial.
With reference to the first possible implementation of the 5th aspect, the rear end matching unit is to compare judgement unit, now,
It is described to export to the matching of rear end matching unit the former modulated signal, including：
The former modulated signal is exported to described and compares judgement unit, if the amplitude of the former modulated signal exceedes presetting
Amplitude threshold, then it is described to compare judgement unit output high level, otherwise, export low level；
Or,
The rear end matching unit is AD sampling units, now, described to export to rear end matching the former modulated signal
Units match, including：
The former modulated signal is exported to AD sampling units, the AD sampling units determine the electricity of the former modulated signal
Pressure amplitude angle value, if the voltage amplitude value exceeds default voltage amplitude threshold value, exports 1, otherwise, output 0.
A kind of 6th aspect of the embodiment of the present invention, there is provided near field channel radio based on near-field communication front end hardware circuit
Letter method, including：
Information according to sending is modulated to carrier wave, obtains modulated signal；
The modulated signal is sent to near-field communication terminal by communication interface pin units, so that the near-field communication
Terminal receives the modulated signal by near-field communication aerial.
With reference to the 6th aspect, in the first possible implementation of the 6th aspect, the modulated signal is passed through described
Communication interface pin units are sent to near-field communication terminal, so that the near-field communication terminal receives institute by near-field communication aerial
After stating modulated signal, including：
Response signal after near-field communication aerial receives the modulation that the near-field communication terminal sends, the response letter
Number for the near-field communication terminal micro-control unit to receive former modulated signal carry out response generation obtain；
The carrier wave of the response after detection unit filters the modulation that the near-field communication terminal sends；
The signal after carrier wave will be filtered to be exported to micro-control unit by communication interface pin units.
The beneficial effect that the embodiment of the present invention exists compared with prior art is：Due to the modulated signal of reception can be filtered
In carrier wave, former modulated signal is obtained, and the former modulated signal is sent to micro-control unit, it is therefore not necessary to using existing
NFC chip can be achieved with the purpose of near-field communication, so that reduces cost, and due to only passing through near-field communication aerial, detection unit
Corresponding function is can be achieved with communication interface pin units, therefore, it is simple with the communication interaction of read write line such that it is able to have
Effect reduces power consumption.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to embodiment or description of the prior art
Needed for the accompanying drawing to be used be briefly described, it should be apparent that, drawings in the following description are only more of the invention
Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is the exemplary circuit of the first near-field communication front end hardware circuit provided in an embodiment of the present invention；
Fig. 2 is the exemplary circuit of rear end matching unit in near-field communication front end hardware circuit provided in an embodiment of the present invention；
Fig. 3 is the exemplary circuit of second near-field communication front end hardware circuit provided in an embodiment of the present invention；
Fig. 4 is the exemplary circuit of the third near-field communication front end hardware circuit provided in an embodiment of the present invention；
Fig. 5 is the first near field communication side based on near-field communication front end hardware circuit provided in an embodiment of the present invention
The flow chart of method；
Fig. 6 is the second provided in an embodiment of the present invention near field communication side based on near-field communication front end hardware circuit
The flow chart of method.
Specific embodiment
In below describing, in order to illustrate rather than in order to limit, it is proposed that the such as tool of particular system structure, technology etc
Body details, thoroughly to understand the embodiment of the present invention.However, it will be clear to one skilled in the art that specific without these
The present invention can also be realized in the other embodiments of details.In other situations, omit to well-known system, device, electricity
Road and the detailed description of method, in case unnecessary details hinders description of the invention.
In order to illustrate technical solutions according to the invention, illustrated below by specific embodiment.
Fig. 1 shows the exemplary circuit of the first near-field communication front end hardware circuit provided in an embodiment of the present invention, in Fig. 1
In, the near-field communication front end hardware circuit includes：
Near-field communication aerial, detection unit 100 and communication interface pin units 13；
The near-field communication aerial includes near field coil 2 and matching capacitance C1, frequency and the selection of the near field coil 2
Carrier frequency is matched；
The detection unit 100 includes one-way conduction unit 11 and filter unit 12, the modulated signal for filtering reception
In carrier wave, obtain former modulated signal, the detection unit 100 is connected with the near field coil 2；
What deserves to be explained is, detection unit 100 can also only include filter unit 12, and unidirectional letter is needed in filter unit 12
Number when, one-way conduction unit 11 can be set in detection unit 100, signal is first passed through one-way conduction unit 11 and export unidirectionally
Filter unit 12 is given to after signal.
It is of course also possible to use itself is the filter unit 12 containing one-way conduction function, now can in detection unit 100
Not include one-way conduction unit 11.
Or, the realization of filter unit 12 need not limit polarity, now, can not also be set in detection unit 100
Put one-way conduction unit 11.
When one-way conduction unit 11 is not provided with, if the filtered waveform of filter unit 12 has positive negative part, can pass through
The interface treatment positive-negative polarity of rear end matching unit or MCU matches reception by way of Differential Input.
The communication interface pin units 13 are described logical for the former modulated signal to be exported to micro-control unit MCU
Letter interface pin unit 13 is connected between the detection unit 100 and the MCU.
In embodiments of the present invention, near-field communication aerial receives the modulated signal that read write line sends, and filters the modulation
The carrier wave of signal, obtains former modulated signal, then the former modulated signal that will be obtained is sent to MCU.Due to the tune of reception can be filtered
Carrier wave in signal processed, obtains former modulated signal, and the former modulated signal is sent to micro-control unit, it is therefore not necessary to using
Existing NFC chip can be achieved with the purpose of near-field communication, so that reduces cost, and due to only passing through near-field communication aerial, inspection
Ripple unit and communication interface pin units can be achieved with corresponding function, therefore, it is simple with the communication interaction of read write line, so that
Power consumption can effectively be reduced.
Fig. 2 shows the example electricity of rear end matching unit in near-field communication front end hardware circuit provided in an embodiment of the present invention
Road, for convenience of description, illustrate only part related to the present invention.
Alternatively, the near-field communication front end hardware circuit also includes：
Rear end matching unit 14, for the former modulated signal to be made decisions into matching, and the signal after matching is passed through
The communication interface pin units 13 are exported to the micro-control unit, and the rear end matching unit 14 is connected to the detection list
Between unit 100 and the communication interface pin units 13.
Alternatively, the rear end matching unit 14 is to compare judgement unit or AD sampling units；
The judgement unit that compares includes：
Comparator U1 and resistance R2, resistance R3；
The positive input of the comparator U1 is connected with the output end of the filter unit 12, and the comparator U1's is anti-
It is grounded by the resistance R2 to input, the reverse input end of the comparator U1 also passes through the resistance R3 and the micro-control
The input/output interface connection of unit processed, the output end of the comparator U1 connects with the reception signal end of the micro-control unit
Connect；
What deserves to be explained is, the connection of the positive input and reverse input end of comparator can be exchanged, defeated when exchanging
Enter the opposite in phase of signal, also or can use Differential Input.
In embodiments of the present invention, valid data are differentiated by comparing judgement unit, can be by resistance R2, electricity
Resistance R3 sets amplitude threshold, and comparator U1 compares current input value with amplitude threshold, if input value is more than amplitude threshold, compares
Compared with device U1 export high level signal, if input value be less than amplitude threshold, comparator U1 output low level signal, and by export
Low and high level signal is sent to process chip and carries out back-end processing.
It is, of course, also possible to be connected to detection unit 100 as AD sampling units using analog-digital converter draw with communication interface
Between pin unit 13.
In embodiments of the present invention, by AD sampled sense voltage range values, voltage amplitude value meets or exceeds restriction threshold
During value, sampling unit output high level, when voltage amplitude value is less than threshold value is limited, sampling unit output low level, when AD samples,
Modulation system is not limited to OOK, extracts the waveform of former modulation intelligence, can also use other modulator approaches such as ASK.
Fig. 3 shows the examples of circuits of second near-field communication front end hardware circuit provided in an embodiment of the present invention, described
Near-field communication front end hardware circuit also includes load modulating unit 15.
The load modulating unit 15, for carrying out load modulation concurrently by controlling the load of the near field coil to change
Modulated signal is sent, the load modulating unit 15 is connected with the detection unit 100.
Fig. 4 shows the examples of circuits of the third near-field communication front end hardware circuit provided in an embodiment of the present invention, in Fig. 4
In, the load modulating unit 15 includes：
On-off circuit module 151 and load control module 152；
The first end of the load control module 152 is connected with the detection unit 100, the load control module 152
The second end be connected with the current input terminal of the on-off circuit module 151, the current output terminal of the on-off circuit module 151
Ground connection, the first control end GPIO, the second control end TX of the on-off circuit module 151 are respectively by the communication interface pin
Unit 13 is connected with input/output interface GPIO, the sending signal end TX of the micro-control unit.
Preferably, on-off circuit module 151 includes：
Second switch pipe Q2 and the 3rd switching tube Q3；
The current input terminal of second switch pipe Q2 is the current input terminal of on-off circuit module 151, second switch pipe Q2's
Current output terminal is the current output terminal of on-off circuit module 151, and the control end of second switch pipe Q2 is with the 3rd switching tube Q3's
Current output terminal is connected, and the current input terminal of the 3rd switching tube Q3 is the first control end of on-off circuit module 151, the 3rd switch
The control end of pipe Q3 is the second control end of on-off circuit module 151.
In embodiments of the present invention, second switch pipe Q2 and the 3rd switching tube Q3 constitutes on-off circuit, by opening for metal-oxide-semiconductor
Concern changes the load that can change coil, and coil load change can be coupled to the transmit coil at read write line end, what read write line passed through
Transmit coil load change can demodulate modulation intelligence.
It is same by TX and bus extender (General Purpose Input Output, GPIO) in order to prevent false triggering
When control load switch.
Certainly, on-off circuit module 151 can also be by a switching tube realization, also or using a switching tube and concatenation
Resistance at switch controlled end is realized.
In embodiments of the present invention, on-off circuit module 151 plays load modulating action, can be only two switch shapes
State, or a load modulation for scope,
Load control module 152 includes：
Resistance R4；
The two ends of resistance R4 are respectively first end and second end of load control module 152.
Alternatively, resistance R4 can also be connected in parallel with a capacitor, and constitute load control module 152.
Communication interface pin units 13 are made up of RX, TX pin, and RX/TX can be directly connected to micro-control unit MCU etc.
Chip, or it is connected to the chips such as micro-control unit MCU by rear end matching unit.
The embodiment of the present invention additionally provides a kind of near-field communication terminal, the front end hardware circuit bag of the near-field communication terminal
Include the near-field communication front end hardware circuit of Fig. 1 to Fig. 4.
The embodiment of the present invention additionally provides a kind of read write line, and the front end hardware circuit of the read write line includes Fig. 1, Fig. 3, figure
4 near-field communication front end hardware circuit.
The embodiment of the present invention additionally provides a kind of near field communication system, and the near field communication system includes above-mentioned
Near-field communication terminal and read write line.
Fig. 5 shows the first near field channel radio based on near-field communication front end hardware circuit provided in an embodiment of the present invention
The flow chart of letter method, the Fig. 5 mainly describes near-field communication terminal (read write line and the near field from this side of near-field communication terminal
Communication terminal is supporting) with read write line with the data interactive method of passive near field communication mode, including：
Step S51, the modulated signal that read write line sends is received by near-field communication aerial, and the near-field communication aerial includes
Near field coil and matching capacitance.
Wherein, the modulated signal can be existing standard interface signal, such as UART, IIC, SPI, single wire transmission agreement
Deng, or customized low speed the modulation format such as frequency modulation, amplitude modulation signal, the waveform of signal can be square wave, just
String ripple, triangular wave or waveform customization.
Step S52, the carrier wave of the modulated signal is filtered by detection unit, obtains former modulated signal.
Specifically, the carrier wave of modulated signal is filtered by customized detection unit, interactive mode is simple.
Step S53, the former modulated signal is exported to micro-control unit by communication interface pin units.
Alternatively, in order to export echo signal, then the step S53 includes：
A1, by the former modulated signal export to rear end matching unit matching.Wherein, rear end matching unit is to compare differentiation
Unit or AD sampling units.
A2, the rear end matching unit is matched after signal exported to described micro- by the communication interface pin units
Control unit.
It is to be matched by match circuit due to exporting to the signal of MCU circuits, therefore, it is possible to export satisfactory mesh
Mark signal.
Alternatively, near-field communication terminal is needed to respond the former modulated signal for receiving, and response signal is transmitted back to
Read write line, then after the step S53, including：
B1, the former modulated signal is responded in the micro-control unit, after producing response signal, according to the sound
Induction signal control load modulating unit, controls the load of the near field coil to change and is loaded by the load modulating unit
Modulation.
B2, the response signal after modulation is sent to the read write line.
Specifically, it is foundation with the response signal for sending, it is right by ASK (amplitude shift key modulation) or OOK (on-off keying)
Near field coil equivalent load is modulated.The antenna (or coil) of near-field communication terminal (such as radio-frequency card) is read write line transmitting antenna
The load of (or coil), radio-frequency card makes read write line by changing the parameter (such as resonance and off resonance) in near-field communication aerial loop
End is modulated, it is achieved thereby that snapping into the data transfer of read write line from radio frequency with faint energy, and then reduces power consumption.
Alternatively, the load modulating unit includes on-off circuit module, and shape is being received in order to reduce near-field communication terminal
To the influence of other communication coils during state, it is described by near-field communication aerial receive read write line send modulated signal when, bag
Include：
The on-off circuit module is controlled to be off state, so that less by the electric current of the near-field communication aerial.
When near-field communication terminal is in reception state, on-off circuit or switching device are off state, now, the near field
The near-field communication aerial equiva lent impedance of communication terminal is very big, the electric current very little for passing through, and keeps low power consumpting state, and hardly consumption is penetrated
Frequency energy, even if having various near field coils on same circuit board, the near-field communication terminal also hardly consumes radio frequency energy
Amount, it is to avoid influence to other communication coils.
Alternatively, the rear end matching unit is to compare judgement unit, now, it is described by the former modulated signal export to
Rear end matching unit matching, including：
The former modulated signal is exported to described and compares judgement unit, if the amplitude of the former modulated signal exceedes presetting
Amplitude threshold, then it is described to compare judgement unit output high level, otherwise, export low level.
Or,
The rear end matching unit is AD sampling units, now, described to export to rear end matching the former modulated signal
Units match, including：
The former modulated signal is exported to AD sampling units, the AD sampling units determine the electricity of the former modulated signal
Pressure amplitude angle value, if the voltage amplitude value exceeds default voltage amplitude threshold value, exports 1, otherwise, output 0.
In the embodiment of the present invention, because the communication of near-field communication terminal and read write line is by near field coil equivalent load
Realization is modulated, such as, the antenna (or coil) of near-field communication terminal is the load of read write line transmitting antenna (or coil), closely
Field communication terminal is modulated read write line end by changing the parameter (such as resonance and off resonance) in near-field communication aerial loop, so that
The data transfer from near-field communication terminal to read write line with faint energy is realized, it is simple to operate, and then reduce power consumption.And
And, the purpose without can be achieved with near-field communication using existing NFC chip, so that reduces cost.
Fig. 6 shows the second provided in an embodiment of the present invention near field channel radio based on near-field communication front end hardware circuit
The flow chart of letter method, the Fig. 6 mainly describes the read write line from this side of read write line, and (read write line is matched somebody with somebody with near-field communication terminal
Set) with near-field communication terminal with the data interactive method of passive near field communication mode, including：
Step S61, is modulated according to the information for sending to carrier wave, obtains modulated signal.
When read write line is toward near-field communication terminal write information：Read write line provides carrier signal.The read write line is sending information
It is foundation, carrier signal is modulated by ASK (amplitude shift key modulation) or OOK (on-off keying), certainly, the read write line
The equivalent effect of amplitude modulation(PAM) can be indirectly reached by adjusting carrier frequency, by deviateing the matching frequency of coil.Wherein,
The information of transmission can be existing standard interface signal, such as UART, IIC, SPI, single wire transmission agreement etc., or make by oneself
The signal of the modulation format such as frequency modulation, the amplitude modulation of low speed of justice, the waveform of signal can be square wave, sine wave, triangular wave or from
Define waveform.
Step S62, the modulated signal is sent to near-field communication terminal by communication interface pin units, so that described
Near-field communication terminal receives the modulated signal by near-field communication aerial.
Alternatively, when read write line reads information from near-field communication terminal, i.e., after the step S62, including：
C1, the response signal after near-field communication aerial receives the modulation that the near-field communication terminal sends, the sound
Induction signal be the near-field communication terminal micro-control unit to receive former modulated signal carry out response generation obtain.
C2, the carrier wave of response after detection unit filters the modulation that the near-field communication terminal sends.
C3, the signal after carrier wave will be filtered exported to micro-control unit by communication interface pin units.
In the embodiment of the present invention, because the communication of read write line and near-field communication terminal is by near field coil equivalent load
Realization is modulated, it is achieved that the data transfer with faint energy from near-field communication terminal to read write line, simple to operate,
And then reduce power consumption.Also, the purpose of near-field communication need not be can be achieved with using existing NFC chip, so that reduces cost.
It should be understood that the size of the sequence number of each step is not meant to the priority of execution sequence, each process in above-described embodiment
Execution sequence should determine that the implementation process without tackling the embodiment of the present invention constitutes any limit with its function and internal logic
It is fixed.
It is apparent to those skilled in the art that, for convenience of description and succinctly, only with above-mentioned each work(
Energy unit, the division of module are carried out for example, in practical application, as needed can distribute by different above-mentioned functions
Functional unit, module are completed, will the internal structure of described device be divided into different functional unit or modules, more than completion
The all or part of function of description.Each functional unit, module in embodiment can be integrated in a processing unit, also may be used
Being that unit is individually physically present, it is also possible to which two or more units are integrated in a unit, above-mentioned integrated
Unit can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.In addition, each function list
Unit, the specific name of module are also only to facilitate mutually differentiation, is not limited to the protection domain of the application.Said system
The specific work process of middle unit, module, may be referred to the corresponding process in preceding method embodiment, will not be repeated here.
In the above-described embodiments, the description to each embodiment all emphasizes particularly on different fields, without detailed description or note in certain embodiment
The part of load, may refer to the associated description of other embodiments.
Those of ordinary skill in the art are it is to be appreciated that the list of each example described with reference to the embodiments described herein
Unit and algorithm steps, can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
Performed with hardware or software mode, depending on the application-specific and design constraint of technical scheme.Professional and technical personnel
Described function, but this realization can be realized it is not considered that exceeding using distinct methods to each specific application
The scope of the present invention.
In embodiment provided by the present invention, it should be understood that disclosed apparatus and method, can be by other
Mode is realized.For example, system embodiment described above is only schematical, for example, the division of the module or unit,
It is only a kind of division of logic function, there can be other dividing mode when actually realizing, such as multiple units or component can be with
With reference to or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, it is shown or discussed
Coupling each other or direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING of device or unit or
Communication connection, can be electrical, mechanical or other forms.
The unit that is illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be according to the actual needs selected to realize the mesh of this embodiment scheme
's.
In addition, during each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.Above-mentioned integrated list
Unit can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated unit is to realize in the form of SFU software functional unit and as independent production marketing or use
When, can store in a computer read/write memory medium.Based on such understanding, the technical scheme of the embodiment of the present invention
The part for substantially being contributed to prior art in other words or all or part of the technical scheme can be with software products
Form embody, the computer software product is stored in a storage medium, including some instructions are used to so that one
Computer equipment (can be personal computer, server, or network equipment etc.) or processor (processor) perform this hair
The all or part of step of bright embodiment each embodiment methods described.And foregoing storage medium includes：USB flash disk, mobile hard disk,
Read-only storage (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic
Dish or CD etc. are various can be with the medium of store program codes.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although with reference to foregoing reality
Example is applied to be described in detail the present invention, it will be understood by those within the art that：It still can be to foregoing each
Technical scheme described in embodiment is modified, or carries out equivalent to which part technical characteristic；And these are changed
Or replace, do not make the spirit and scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution, all should
It is included within protection scope of the present invention.
Claims (15)
1. a kind of near-field communication front end hardware circuit, it is characterised in that the near-field communication front end hardware circuit includes：
Near-field communication aerial, detection unit and communication interface pin units；
The near-field communication aerial includes near field coil and matching capacitance, the frequency of the near field coil and the carrier frequency chosen
Matching；
The detection unit, for the carrier wave in the modulated signal for filtering reception, obtains former modulated signal, the detection unit with
The near field coil connection；
The communication interface pin units, for the former modulated signal to be exported to micro-control unit, the communication interface is drawn
Pin unit is connected between the detection unit and the micro-control unit.
2. near-field communication front end hardware circuit as claimed in claim 1, it is characterised in that the near-field communication front end hardware electricity
Road also includes：
Rear end matching unit, for the former modulated signal to be made decisions into matching, and by the signal after matching by described logical
Letter interface pin unit is exported to the micro-control unit, and it is logical with described that the rear end matching unit is connected to the detection unit
Between letter interface pin unit.
3. near-field communication front end hardware circuit as claimed in claim 2, it is characterised in that the rear end matching unit includes：
The rear end matching unit is to compare judgement unit or AD sampling units.
4. the near-field communication front end hardware circuit as described in any one of claims 1 to 3, it is characterised in that the near-field communication
Front end hardware circuit also includes load modulating unit；
The load modulating unit, for modulating and sending modulation by controlling the load of near field coil change to carry out load
Signal, the load modulating unit is connected with the detection unit.
5. near-field communication front end hardware circuit as claimed in claim 4, it is characterised in that the load modulating unit includes：
On-off circuit module and load control module；
The first end of the load control module is connected with the detection unit, the second end of the load control module with it is described
The current input terminal connection of on-off circuit module, the current output terminal ground connection of the on-off circuit module, the on-off circuit mould
First control end, second control end of block are defeated with the input of the micro-control unit by the communication interface pin units respectively
Outgoing interface, the connection of sending signal end.
6. a kind of near-field communication terminal, it is characterised in that the front end hardware circuit of the near-field communication terminal includes claim 1
Near-field communication front end hardware circuit described in 5 any one.
7. a kind of read write line, it is characterised in that the front end hardware circuit of the read write line includes any one of claims 1 to 3 institute
The near-field communication front end hardware circuit stated.
8. a kind of near field communication system, it is characterised in that the near field communication system is included described in claim 6
Read write line described in near-field communication terminal and claim 7.
9. a kind of near field communication method based on near-field communication front end hardware circuit, it is characterised in that including：
By near-field communication aerial receive read write line send modulated signal, the near-field communication aerial include near field coil and
With electric capacity；
The carrier wave of the modulated signal is filtered by detection unit, former modulated signal is obtained；
The former modulated signal is exported to micro-control unit by communication interface pin units.
10. near field communication method as claimed in claim 9, it is characterised in that described to pass through the former modulated signal
First communication interface pin is exported to the MCU circuits, including：
The former modulated signal is exported to the matching of rear end matching unit；
Signal after the rear end matching unit is matched is exported to the microcontroller list by the communication interface pin units
Unit.
11. near field communication methods as claimed in claim 9, it is characterised in that lead to the former modulated signal described
Communication interface pin units are crossed to export to micro-control unit, including：
The former modulated signal is responded in the micro-control unit, after producing response signal, according to the response signal
Control load modulating unit, controlling the load of the near field coil to change by the load modulating unit carries out load modulation；
Response signal after modulation is sent to the read write line.
12. near field communication methods as claimed in claim 9, it is characterised in that the load modulating unit includes switch
Circuit module, it is described by near-field communication aerial receive read write line send modulated signal when, including：
The on-off circuit module is controlled to be off state, so that less by the electric current of the near-field communication aerial.
13. near field communication methods as claimed in claim 10, it is characterised in that the rear end matching unit is sentenced to compare
Other unit, it is now, described to export to the matching of rear end matching unit the former modulated signal, including：
The former modulated signal is exported to described and compares judgement unit, if the amplitude of the former modulated signal exceedes predetermined amplitude
Threshold value, then it is described to compare judgement unit output high level, otherwise, export low level；
Or,
The rear end matching unit is AD sampling units, now, described to export to rear end matching unit the former modulated signal
Matching, including：
The former modulated signal is exported to AD sampling units, the AD sampling units determine the voltage amplitude of the former modulated signal
Angle value, if the voltage amplitude value exceeds default voltage amplitude threshold value, exports 1, otherwise, output 0.
A kind of 14. near field communication methods based on near-field communication front end hardware circuit, it is characterised in that including：
Information according to sending is modulated to carrier wave, obtains modulated signal；
The modulated signal is sent to near-field communication terminal by communication interface pin units, so that the near-field communication terminal
The modulated signal is received by near-field communication aerial.
15. near field communication methods as claimed in claim 14, it is characterised in that pass through the modulated signal described
Communication interface pin units are sent to near-field communication terminal, so that the near-field communication terminal receives institute by near-field communication aerial
After stating modulated signal, including：
Response signal after near-field communication aerial receives the modulation that the near-field communication terminal sends, the response signal is
The micro-control unit of the near-field communication terminal carries out response generation to the former modulated signal for receiving and obtains；
The carrier wave of the response after detection unit filters the modulation that the near-field communication terminal sends；
The signal after carrier wave will be filtered to be exported to micro-control unit by communication interface pin units.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710184291.8A CN106909865B (en) | 2017-03-24 | 2017-03-24 | Near-field communication front end hardware circuit, terminal, reader, system and method |
| PCT/CN2018/080227 WO2018171723A1 (en) | 2017-03-24 | 2018-03-23 | Near field communication front-end hardware circuit, terminal, reader/writer, system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710184291.8A CN106909865B (en) | 2017-03-24 | 2017-03-24 | Near-field communication front end hardware circuit, terminal, reader, system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106909865A true CN106909865A (en) | 2017-06-30 |
| CN106909865B CN106909865B (en) | 2019-10-25 |
Family
ID=59195181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710184291.8A Active CN106909865B (en) | 2017-03-24 | 2017-03-24 | Near-field communication front end hardware circuit, terminal, reader, system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106909865B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107832818A (en) * | 2017-12-08 | 2018-03-23 | 江苏本能科技有限公司 | Radio-frequency identification reader/writer and Roadside Parking management system based on multizone identification |
| WO2018171723A1 (en) * | 2017-03-24 | 2018-09-27 | 深圳市文鼎创数据科技有限公司 | Near field communication front-end hardware circuit, terminal, reader/writer, system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101276399A (en) * | 2007-03-28 | 2008-10-01 | 英赛康特雷斯公司 | Method of coupling a contactless integrated circuit to an nfc component |
| US20120001732A1 (en) * | 2010-07-01 | 2012-01-05 | Intelleflex Corporation | Variable rate preamble detection using ratiometric methods |
| CN104823204A (en) * | 2012-12-12 | 2015-08-05 | 索尼公司 | Communication device, communication method, integrated circuit, and electronic instrument |
| CN105308874A (en) * | 2013-06-18 | 2016-02-03 | 高通股份有限公司 | Methods and apparatus for improving remote NFC device detection using a low power oscillator circuit |
| CN105872955A (en) * | 2016-04-29 | 2016-08-17 | 昆山维信诺科技有限公司 | Touch integrated circuit integrating near-field communication and near-field communication method of touch integrated circuit |
-
2017
- 2017-03-24 CN CN201710184291.8A patent/CN106909865B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101276399A (en) * | 2007-03-28 | 2008-10-01 | 英赛康特雷斯公司 | Method of coupling a contactless integrated circuit to an nfc component |
| US20120001732A1 (en) * | 2010-07-01 | 2012-01-05 | Intelleflex Corporation | Variable rate preamble detection using ratiometric methods |
| CN104823204A (en) * | 2012-12-12 | 2015-08-05 | 索尼公司 | Communication device, communication method, integrated circuit, and electronic instrument |
| CN105308874A (en) * | 2013-06-18 | 2016-02-03 | 高通股份有限公司 | Methods and apparatus for improving remote NFC device detection using a low power oscillator circuit |
| CN105872955A (en) * | 2016-04-29 | 2016-08-17 | 昆山维信诺科技有限公司 | Touch integrated circuit integrating near-field communication and near-field communication method of touch integrated circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018171723A1 (en) * | 2017-03-24 | 2018-09-27 | 深圳市文鼎创数据科技有限公司 | Near field communication front-end hardware circuit, terminal, reader/writer, system and method |
| CN107832818A (en) * | 2017-12-08 | 2018-03-23 | 江苏本能科技有限公司 | Radio-frequency identification reader/writer and Roadside Parking management system based on multizone identification |
| CN107832818B (en) * | 2017-12-08 | 2024-03-29 | 江苏本能科技有限公司 | Radio frequency identification reader-writer based on multi-region identification and road side parking management system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106909865B (en) | 2019-10-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101425704B (en) | Power receiving device and power transfer system | |
| CN101840387B (en) | USB (Universal Serial Bus) Key device and method for realizing smart card communications using USB interface | |
| US20130130743A1 (en) | Audio Jack Magnetic Card Reader | |
| CN102340358B (en) | Apparatus applied for detection and transmission of low frequency signal | |
| CN101334855A (en) | Non-contact electronic device | |
| CN207369033U (en) | NFC interface with energy management functionality | |
| CN202077102U (en) | Realization device for near field communication (NFC) mobile phone | |
| CN106909865B (en) | Near-field communication front end hardware circuit, terminal, reader, system and method | |
| CN103390303B (en) | Based on financial key and the control method thereof of audio frequency and USB data transmission | |
| CN109448181A (en) | A kind of antitheft access control system | |
| CN103985072A (en) | Kindergarten pickup system based on mobile internet and implementation method | |
| CN101552614B (en) | Single antenna tuning circuit used for near field communication equipment | |
| CN109698713A (en) | NFC interface with energy management functionality | |
| CN206698220U (en) | The front end hardware circuit and dynamic token of a kind of dynamic token | |
| CN202110569U (en) | Ultrahigh-frequency RFID (radio frequency identification device) reader-writer of embedded mobile communication terminal | |
| CN204408421U (en) | Based on the NFC mobile phone Circuits System of Adaptive matching circuit | |
| CN207637180U (en) | A kind of near-field communication front end hardware circuit, safety chip, dynamic token and contact type intelligent card | |
| CN107094037B (en) | The front end hardware circuit of dynamic token and its method for awarding seed or production configuration | |
| CN206819380U (en) | A kind of near-field communication modulation-demodulation circuit, safety chip and dynamic token | |
| CN102364493B (en) | Novel high-frequency communication protocol monitoring circuit | |
| CN209168213U (en) | A kind of antitheft access control system | |
| CN206820750U (en) | A kind of the near-field communication demodulator circuit and safety chip of rear end matching | |
| CN206564594U (en) | A kind of multiple antennas near-field communication modulation-demodulation device and dynamic token | |
| CN207020699U (en) | A kind of chargeable near-field communication modulation-demodulation circuit and dynamic token | |
| CN207051953U (en) | Universal smart card and system based on mobile terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |