CN108055089A - The working frequency of NFC device determines method and device - Google Patents
The working frequency of NFC device determines method and device Download PDFInfo
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- CN108055089A CN108055089A CN201711339663.6A CN201711339663A CN108055089A CN 108055089 A CN108055089 A CN 108055089A CN 201711339663 A CN201711339663 A CN 201711339663A CN 108055089 A CN108055089 A CN 108055089A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive loop type
Abstract
The present invention provides a kind of working frequencies of NFC device to determine method and device, the described method includes：Matching network corresponding with the setpoint frequency is configured according to the setpoint frequency of the NFC device；Detect the antenna coupling energy state of the NFC device；The working frequency of the NFC device is determined according to antenna coupling energy state.The working frequency of the NFC device is finally locked by coupling energy state according to the antenna, so as to solve the problems, such as the frequency departure of NFC device, improves the communication quality of NFC device.
Description
Technical field
The present invention relates to the communications fields, and method and device is determined in particular to a kind of working frequency of NFC device.
Background technology
Short-range communication (Near Field Communication, NFC) technology is a kind of measured short-distance wireless
Interconnection technique, i.e. the fusion of non contact angle measurement technology and interconnection technique.NFC can realize letter between multiple electronic equipments
Single and safety two-way interactive.At present, which is commonly utilized in financial services industry.Wherein, it is whole to carry out mobile phone
End payment uses a kind of applied business of NFC technique, brush mass transit card, and the ID card verification of police system can use NFC
Technology is realized.
The NFC technique of 13.56MHz is highly developed at present, is used widely on smart mobile phone, becomes now
One of one indispensable application function of smart mobile phone.The NFC technique of 13.56MHz is promoted as standard agreement in the whole world, but
Be since the designed capacity of each label manufacturer is inconsistent, the different batches of the card of different manufacturers or same producer
Frequency optimum traffic scope between card causes the NFC coil resonances Frequency point of inside tags not there is also larger difference
It is on 13.56MHz or even deviation is very big, so as to terminal and label occur, main equipment can not carry out NFC with slave device and lead to
Letter.
The content of the invention
Working frequency the present invention provides NFC device determines method and device, is filled at least solving NFC in correlation technique
Communication quality problem caused by the frequency deviation put.
According to an aspect of the invention, there is provided a kind of working frequency of NFC device determines method, including：According to institute
The setpoint frequency for stating NFC device configures matching network corresponding with the setpoint frequency；Detect the antenna coupling of the NFC device
Energy state；The working frequency of the NFC device is determined according to antenna coupling energy state.
In one embodiment, the setpoint frequency is multiple, according to the configuration of the setpoint frequency of the NFC device with it is described
The corresponding matching network of setpoint frequency, including：For the NFC device configurable clock generator parameter NFC device is exported respectively
Multiple setpoint frequencies；Corresponding matching network is respectively configured according to the multiple setpoint frequency.
In one embodiment, the antenna coupling energy state of the NFC device is detected, energy is coupled according to the antenna
State determines the working frequency of the NFC device, including：The antenna coupling of the NFC device under each setpoint frequency is detected respectively
Close energy state；Energy state is coupled according to the antenna, a setpoint frequency in the multiple setpoint frequency is locked as
The working frequency of the NFC device.
In one embodiment, a setpoint frequency in the multiple setpoint frequency is locked as the NFC device
After working frequency, further include：Configuration matching network corresponding with the working frequency.
In one embodiment, for the NFC device configurable clock generator parameter NFC device is caused to export multiple frequencies respectively
Rate, including：By configuring different timing parameters so that centre frequency of the NFC device based on setting, with default step-length
Multiple setpoint frequencies are exported respectively.
In one embodiment, the antenna coupling energy state of the NFC device under each setpoint frequency, bag are detected respectively
Include one below：The load modulation amplitude of the NFC device under each setpoint frequency is detected respectively；The each setting frequency of detection respectively
The standing-wave ratio of the transmitting signal of the NFC device under rate；The output voltage of the NFC device under each setpoint frequency is detected respectively
Value.
In one embodiment, energy state is coupled according to the antenna, one in the multiple setpoint frequency is set
Determine the working frequency that Frequency Locking is the NFC device, including：Compare the load tune of the NFC device under each setpoint frequency
Setpoint frequency corresponding with maximum load modulation amplitude is locked as stating the working frequency of NFC device by amplitude processed.
In one embodiment, energy state is coupled according to the antenna, one in the multiple setpoint frequency is set
Determine the working frequency that Frequency Locking is the NFC device, including：Compare the transmitting letter of the NFC device under each setpoint frequency
Number standing-wave ratio, will be locked as stating the working frequency of NFC device than corresponding setpoint frequency with minimum standing wave.
In one embodiment, energy state is coupled according to the antenna, one in the multiple setpoint frequency is set
Determine the working frequency that Frequency Locking is the NFC device, including：Compare the output electricity of the NFC device under each setpoint frequency
Setpoint frequency corresponding with minimum amount of voltage that is locked as stating the working frequency of NFC device by pressure value.
According to another aspect of the present invention, a kind of NFC working frequencies determining device is provided, including：Configuration module is used for
Matching network corresponding with the setpoint frequency is configured according to the setpoint frequency of NFC device；Detection module, it is described for detecting
The antenna coupling energy state of NFC device；Determining module couples energy state according to the antenna and determines the NFC device
Working frequency.
In one embodiment, configuration module includes：First dispensing unit, for joining for the NFC device configurable clock generator
Number is so that the NFC device exports multiple setpoint frequencies respectively；Second dispensing unit, for according to the multiple setpoint frequency point
Corresponding matching network is not configured.
In one embodiment, the setpoint frequency is multiple, the detection module, is additionally operable to detect each setting respectively
The antenna coupling energy state of the NFC device under frequency；The determining module is additionally operable to couple energy shape according to the antenna
A setpoint frequency in the multiple setpoint frequency is locked as the working frequency of the NFC device by state.
In one embodiment, the configuration module is additionally operable to lock the work of the NFC device in the determining module
After frequency, matching network corresponding with the working frequency is configured.
In one embodiment, first dispensing unit is additionally operable to by configuring different timing parameters so that described
Centre frequency of the NFC device based on setting exports multiple setpoint frequencies respectively with default step-length.
In one embodiment, the detection module includes at least one of：First detection unit, for detecting respectively
The load modulation amplitude of the NFC device under each setpoint frequency；Second detection unit, for detecting each setpoint frequency respectively
Under the NFC device transmitting signal standing-wave ratio；3rd detection unit, it is described under each setpoint frequency for detecting respectively
The output voltage values of NFC device.
In one embodiment, the determining module includes at least one of：First determination unit.For relatively more each
Setpoint frequency corresponding with maximum load modulation amplitude is locked as by the load modulation amplitude of the NFC device under setpoint frequency
State the working frequency of NFC device；Second determination unit, for comparing the transmitting signal of the NFC device under each setpoint frequency
Standing-wave ratio, will be locked as stating the working frequency of NFC device than corresponding setpoint frequency with minimum standing wave；3rd determination unit,
It, will setpoint frequency lock corresponding with minimum amount of voltage that for comparing the output voltage values of the NFC device under each setpoint frequency
It is set to the working frequency for stating NFC device.
Another aspect according to embodiments of the present invention, additionally provides a kind of NFC identification devices, including NFC chip, control
Device, matching network module and NFC antenna module, wherein, the NFC chip, including clock circuit, for by for the clock
Circuit configures different timing parameters and the NFC device is caused to export multiple default working frequencies；The controller, for root
The matching network module and the NFC antenna module are configured to respectively according to the timing parameter corresponding with the working frequency
Operating mode；The matching network module is connected between the NFC chip and the NFC antenna module, for described
The interactive signal between the NFC chip and the NFC antenna module is filtered, matched and adjusted under the control of controller
It is humorous.
Wherein, the clock source of the clock circuit is the internal clock source of the NFC chip or is external clock reference.
In one embodiment, which further includes：Detection circuit, for detecting multiple default works respectively
The antenna coupling energy state of the NFC device under working frequency.
In one embodiment, the detection circuit is one of the following：For detecting the modulation of the load in the NFC chip
The detection circuit of amplitude；For detecting the standing wave detection circuit of the standing-wave ratio of the NFC antenna module transmitting signal；For detecting
The rectification circuit of the output voltage values of the NFC identification devices.
In one embodiment, the NFC antenna module includes the NFC antenna of one below：Wire coil, patch type day
Line, adjustable antenna.
Another aspect according to embodiments of the present invention, additionally provides a kind of storage medium, and the storage medium includes storage
Program, wherein, the method and step above in embodiment is performed when described program is run.
Another aspect according to embodiments of the present invention additionally provides a kind of processor, and the processor is used for operation program,
Wherein, the method and step described in embodiment above is performed when described program is run.
In above-described embodiment provided by the present invention, finally institute is locked by coupling energy state according to the antenna
The working frequency of NFC device is stated, so as to solve the problems, such as the frequency departure of NFC device, improves the communication quality of NFC device.
Description of the drawings
Attached drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description does not constitute improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is that the working frequency of NFC device according to embodiments of the present invention determines the flow chart of method；
Fig. 2 is the structure diagram of NFC identification devices according to embodiments of the present invention；
Fig. 3 is matching network module schematic equivalent circuit according to embodiments of the present invention；
Fig. 4 is NFC antenna module schematic equivalent circuit according to embodiments of the present invention；
Fig. 5 is standing wave detection circuit block diagram according to embodiments of the present invention；
Fig. 6 is rectification detection circuit block diagram according to embodiments of the present invention；
Fig. 7 is NFC recognition methods flow charts according to embodiments of the present invention；
Fig. 8 is according to embodiments of the present invention one NFC recognition methods flow charts；
Fig. 9 is according to embodiments of the present invention two NFC recognition methods flow charts；
Figure 10 is NFC working frequency determining device structure diagrams according to embodiments of the present invention.
Specific embodiment
Come that the present invention will be described in detail below with reference to attached drawing and in conjunction with the embodiments.It should be noted that do not conflicting
In the case of, the feature in embodiment and embodiment in the application can be mutually combined.
It should be noted that term " first " in description and claims of this specification and above-mentioned attached drawing, "
Two " etc. be the object for distinguishing similar, without being used to describe specific order or precedence.
The NFC technique of 13.56MHz is highly developed at present and is used widely, it provides a kind of simple, touch-control
The solution of formula exchanges information, accesses content and service in which can allow consumer's simple, intuitive.Its operating mode includes three
Kind：Snap gauge is intended, point-to-point, reader.By these three operating modes, similar brush public transport can be realized, data pass between equipment
It is defeated, the functions such as reading identity card information.But there are numerous electronic tags or equipment on the market at present, internal NFC coils
Working frequency is illustrated not on the 13.56MHz of standard with the identity card of domestic authority, even if areal, indoor design
Disunity for the identity card that frequency deviation is larger, in the NFC device communication with standard, can read difficulty or even failure.
The mechanism of the present invention is during being communicated based on NFC, and the working frequency of nfc card piece derives from the hair of NFC mobile phone
Radio frequency rate, this working frequency are then communicated close to working frequency optimal under the physical environment of nfc card piece and NFC mobile phone composition
Performance can get a promotion；If the physical environment that the frequency departure nfc card piece and NFC mobile phone of NFC mobile phone transmitting form is optimal
Working frequency, then communication performance can deteriorate.
An embodiment of the present invention provides a kind of working frequencies of NFC device to determine method, as shown in Figure 1, this method includes
Following steps：
Step S102 configures matching network corresponding with the setpoint frequency according to the setpoint frequency of the NFC device；
Step S104 detects the antenna coupling energy state of the NFC device；
Step S106 determines the working frequency of the NFC device according to antenna coupling energy state.
In above-described embodiment provided by the present invention, finally institute is locked by coupling energy state according to the antenna
The working frequency of NFC device is stated, so as to solve the problems, such as the frequency departure of NFC device, improves the communication quality of NFC device.
The embodiment of the present invention additionally provides a kind of NFC identification devices, in the present embodiment, leads to every time in NFC identification devices
Letter is initial, the frequency centered on 13.56MHz, and communication scanner is carried out with certain step-length, while under the corresponding frequencies according to acquisition
The parameters such as modulation amplitude, signal-to-noise ratio, by searching for truth table, determine final frequency, lock matching network parameter so that antenna
Coupling energy is optimal.As shown in Fig. 2, the NFC identification devices include NFC chip 101, controller 102, matching network module
103rd, NFC antenna module 104 and detection circuit 105.
NFC chip 101, it includes there is clock circuit, which can stablize output according to different parameters is configured
Relevant work frequency.When the clock circuit can be the adjustable clock circuit of chip exterior or adjustable chip internal
Clock circuit.
Controller 102 according to the timing parameter set in NFC chip 101, sends control instruction so that matching network
Module 103 and NFC antenna module 104 are operated in corresponding pattern.
Matching network module 103, which includes the circuits such as filtering, matching, tuning, so as to allow giving full play to property of antenna
Can, promote antenna coupling mass.
NFC antenna module 104, the module bodies are antennas, can be wire coils, can be pasted sheet type antennas or can
Adjust antenna.
Detection circuit 105, mainly for detection of current antenna coupling mass.It can be the inspection that NFC chip is internally integrated
Module or the detection circuit of outside are surveyed, effect is by detection, learns the antenna coupling mass under current state.
Wherein, matching network module 103 may be referred to the matching network equivalent schematic circuit of Fig. 3, and specific design is not limited to
In above-mentioned illustrative circuitry.Capacitance L, capacitance C can be fixed or control adjustable.It is sent according to controller 102
Control instruction in the block to matching network mould in matching network module 103 can be designed and adjusted into Mobile state, more preferable so as to reach
Filtering, matching effect.
Wherein, NFC antenna module 104 may be referred to the antenna equivalent schematic of Fig. 4, and specific design is not limited to Fig. 4.
Antenna can be fixed design, i.e. capacitance C, inductance L, and the value of resistance R, which is fixed, or resonant frequency is adjustable sets
Meter, i.e. capacitance C, inductance L, the value of resistance R can change, correspond on antenna material object, can by various switchings,
It is realized to change the length of antenna, cabling form etc..It, can be to NFC antenna mould according to the control instruction that controller 102 is sent
Antenna condition in block 104 is adjusted into Mobile state, so that antenna energy coupling is optimal.
Wherein, detection circuit 105 can be detection modules inside NFC chip, such as pass through LMA (load modulation
Amplitude) load modulation amplitude and obtain antenna coupling mass, LMA values are bigger, show the coupling of NFC circuit and tag card
Degree is higher.The antenna coupling mass of current state can also be obtained by other methods.For example it can be sent out by detecting NFC antenna
The standing wave ratio of signal is penetrated, as shown in figure 5, in the case that standing wave detection circuit is operated in NFC circuit output no-load ripple, coupler
Part energy is coupled into two-way switching switch, when switch does not switch, what detecting circuit measured is positive work(
Rate, when switching, what detecting circuit measured is reversed power, and by the two performance numbers calculate can obtain
To standing-wave ratio, standing-wave ratio is smaller, shows that the degree of coupling of NFC circuit and tag card is higher.Detection circuit can also be rectification inspection
Survey form, as shown in fig. 6, in the case that in Card Reader, the circuit is operated in NFC circuit output no-load ripple, rectification circuit
It can detect the voltage value of NFC outputs, the voltage value is smaller, shows that the degree of coupling of NFC circuit and tag card is higher.Always
It, many for detecting the method for coupling mass of the NFC circuit system with being read object, form is also various, is not limited to
It is above-mentioned several.Illustrate to simplify, the present invention is illustrated by taking the LMA inside currently used NFC chip as an example.
In above-described embodiment provided by the present invention, by a whole set of closed-loop system, the prior art can be solved
In the communication issue that brings of insurmountable product frequency deviation, you can existing on the market miscellaneous swiped the card with preferably compatible
Equipment promotes user experience.
Based on above-mentioned NFC identification devices, the present embodiment additionally provides a kind of NFC recognition methods, as shown in fig. 7, the party
Method includes following flow：
Step S701, system proceed by NFC interactions.
Step S702, system are initially configured NFC chip clock circuit, are allowed to export a setpoint frequency, while by controller
Instruction is sent, configures the matching network corresponding to the setpoint frequency.
Step S703, under the setpoint frequency, detection judges whether NFC interactive performances are optimal at this time, if not
It is optimal, then S702 is jumped to, clock circuit is reset with a fixed step size or rule, is allowed to export another work frequency again
Rate.
Step S704, if S703 judges that NFC interactive performances are optimal at this time, record the setpoint frequency and lock,
Configuration is by the good corresponding matching network of controller simultaneously.
Implementation is described in detail below：
In the following example, for each different operating frequency, a set of matching network corresponds to therewith so that this
When antenna performance under the working frequency performance be optimal.
For example, in the identifying system, centered on standard 13.56MHz, 5 sets of configurations are stored, as shown in table 1：
Table 1
| Working frequency | Net mate | Antenna match |
| F1 | M1 | A1 |
| F2 | M2 | A2 |
| 13.56MHz | M | A |
| F3 | M3 | A3 |
| F4 | M4 | A4 |
When NFC chip 101 is operated under 13.56MHz working frequencies, controller 102 sends instruction, respectively so that pair net
Network module 103 is operated in M, and NFC antenna module 104 is operated in A.M and A is matched, it is adapted successful at the beginning of product design
Matching.As previously mentioned, can be by changing inductance L, capacitance C equivalences realize different net mates, can be opened by various
Concern is changed, and antenna match is realized to change the length of antenna, cabling form etc..So that antenna performance is fully sent out
It waves.How to confirm network and antenna match, in the industry cycle there are many methods to realize, do not repeat herein.
Detection circuit 105 can monitor the antenna coupling mass under current frequency in real time, such as can be according to LMA (load
Modulation amplitude) size of modulation amplitude is loaded to judge.Certainly, detection circuit is various informative, does not limit to
LMA is a kind of.
More than, it is merely illustrative, 1 set is may be greater than in practical application, it is not limited to 5 sets of above-mentioned configurations.
Embodiment one：
System proceeds by NFC interactions, as shown in figure 8, the flow includes the following steps：
Step S801, system are initially configured NFC chip clock circuit, are allowed to export default frequency 13.56MHz, while by
Controller sends instruction, and matching network module 103 is configured to M, and NFC antenna module 104 is configured to A.
Step S802 records LMA values X at this time.
Step S803 configures NFC chip clock circuit, is allowed to output frequency F2, while sends instruction, general by controller
Distribution network module 103 is configured to M2, and NFC antenna 104 is configured to A2.
Step S804 records LMA values X2 at this time.
Step S805 configures NFC chip clock circuit, is allowed to output frequency F3, while sends instruction, general by controller
Distribution network module 103 is configured to M3, and NFC antenna 104 is configured to A3.
Step S806 records LMA values X3 at this time.
Step S807 configures NFC chip clock circuit, is allowed to output frequency F1, while sends instruction, general by controller
Distribution network module 103 is configured to M1, and NFC antenna 104 is configured to A1.
Step S808 records LMA values X1 at this time.
Step S809 configures NFC chip clock circuit, is allowed to output frequency F4, while sends instruction, general by controller
Distribution network module 103 is configured to M4, and NFC antenna 104 is configured to A4.
Step S810 records LMA values X4 at this time.X1, X2, X, X3, X4 are compared, obtains maximum X3.
Step S811 locks NFC chip clock circuit, is allowed to output frequency F3, while sends instruction, general by controller
Distribution network module 103 is configured to M3, and NFC antenna 104 is configured to A3.
The present embodiment flow terminates.
In the embodiment, system gives tacit consent to outputting standard working frequency 13.56MHz first, defeated centered on the frequency afterwards
Go out different working frequencies.
It is of course also possible to exported according to other rules, it is not limited to aforesaid way, such as can be F1, F2,
13.56MHz, F3, F4 or F4, F3,13.56MHz, F2, F1.These are not the core point of the present invention, are not gone to live in the household of one's in-laws on getting married herein
It states.
Embodiment two：
System proceeds by NFC interactions, as shown in figure 9, the flow includes the following steps：
Step S901, system are initially configured NFC chip clock circuit, are allowed to export default frequency 13.56MHz, while by
Controller sends instruction, and matching network module 103 is configured to M, and matching network module 104 is configured to A.
Step S902 records LMA values X at this time.
Step S903 configures NFC chip clock circuit, is allowed to output frequency F2, while sends instruction, general by controller
Distribution network module 103 is configured to M2, and matching network module 104 is configured to A2.
Step S904 records LMA values X2, and X2 and X are compared at this time, obtains maximum X2.
Step S905 configures NFC chip clock circuit, is allowed to output frequency F3, while sends instruction, general by controller
Distribution network module 103 is configured to M3, and matching network module 104 is configured to A3.
Step S906 records LMA values X3, and maximum X2 by X3 and before is compared, and obtains maximum X3 at this time.
Step S907 configures NFC chip clock circuit, is allowed to output frequency F1, while sends instruction, general by controller
Distribution network module 103 is configured to M1, and matching network module 104 is configured to A1.
Step S908 records LMA values X1, and maximum X3 by X1 and before is compared, and obtains maximum X3 at this time.
Step S909 configures NFC chip clock circuit, is allowed to output frequency F4, while sends instruction, general by controller
Distribution network module 103 is configured to M4, and matching network module 104 is configured to A4.
Step S910 records LMA values X4, and maximum X3 by X4 and before is compared, and obtains maximum X4 at this time.
Step S911 locks NFC chip clock circuit, is allowed to output frequency F4, while sends instruction, general by controller
Distribution network module 103 is configured to M4, and matching network module 104 is configured to A4.
Through the above description of the embodiments, those skilled in the art can be understood that according to above-mentioned implementation
The method of example can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but it is very much
In the case of the former be more preferably embodiment.Based on such understanding, technical scheme is substantially in other words to existing
The part that technology contributes can be embodied in the form of software product, which is stored in a storage
In medium (such as ROM/RAM, magnetic disc, CD), used including some instructions so that a station terminal equipment (can be mobile phone, calculate
Machine, server or network equipment etc.) perform method described in each embodiment of the present invention.
A kind of NFC working frequencies determining device is additionally provided in the present embodiment, which is used to implement above-described embodiment
And preferred embodiment, carried out repeating no more for explanation.As used below, term " module " can be realized predetermined
The combination of the software and/or hardware of function.It is hard although following embodiment described device is preferably realized with software
The realization of the combination of part or software and hardware is also what may and be contemplated.
Figure 10 is NFC working frequency determining device structure diagrams according to embodiments of the present invention, as shown in Figure 10, the device
Including：Configuration module 201, detection module 202 and confirmation module 203.
Configuration module 201, for configuring pair net corresponding with the setpoint frequency according to the setpoint frequency of NFC device
Network.Configuration module 201 in the present embodiment and the NFC chip 101 in embodiment above are functionally suitable.
Detection module 202, for detecting the antenna of NFC device coupling energy state.Detection mould in the present embodiment
Block 202 is functionally suitable with the detection circuit 105 in embodiment above.
Determining module 203 determines the working frequency of the NFC device according to antenna coupling energy state.This implementation
Determining module 203 in example and the controller 102 in embodiment above are functionally suitable.
It should be noted that above-mentioned modules can be realized by software or hardware, for the latter, Ke Yitong
In the following manner realization is crossed, but not limited to this：Above-mentioned module is respectively positioned in same processor；Alternatively, above-mentioned module is respectively positioned at more
In a processor.
The embodiment of the present invention additionally provides a kind of processor, which is used for operation program, wherein, described program
The method and step in embodiment above is performed during operation.
The embodiment of the present invention additionally provides a kind of storage medium.In the present embodiment, above-mentioned storage medium can be set
Storage is set to for performing the method and step in embodiment above.
Optionally, in the present embodiment, above-mentioned storage medium can include but is not limited to：USB flash disk, read-only memory (ROM,
Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disc or
The various media that can store program code such as CD.
Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can be with general
Computing device realize that they can concentrate on single computing device or be distributed in multiple computing devices and be formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
Performed in the storage device by computing device, and in some cases, can be performed with the order being different from herein shown in
The step of going out or describing they are either fabricated to each integrated circuit modules respectively or by multiple modules in them or
Step is fabricated to single integrated circuit module to realize.It to be combined in this way, the present invention is not limited to any specific hardware and softwares.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (23)
1. a kind of working frequency of NFC device determines method, which is characterized in that including：
Matching network corresponding with the setpoint frequency is configured according to the setpoint frequency of the NFC device；
Detect the antenna coupling energy state of the NFC device；
The working frequency of the NFC device is determined according to antenna coupling energy state.
2. according to the method described in claim 1, it is characterized in that, the setpoint frequency is multiple, according to the NFC device
Setpoint frequency configures matching network corresponding with the setpoint frequency, including：
For the NFC device configurable clock generator parameter NFC device is caused to export multiple setpoint frequencies respectively；
Corresponding matching network is respectively configured according to the multiple setpoint frequency.
3. according to the method described in claim 2, it is characterized in that, detect the antenna coupling energy state of the NFC device, root
The working frequency of the NFC device is determined according to antenna coupling energy state, including：
The antenna coupling energy state of the NFC device under each setpoint frequency is detected respectively；
Energy state is coupled according to the antenna, a setpoint frequency in the multiple setpoint frequency is locked as the NFC
The working frequency of device.
4. according to the method described in claim 3, it is characterized in that, a setpoint frequency in the multiple setpoint frequency is locked
It is set to after the working frequency of the NFC device, further includes：
Configuration matching network corresponding with the working frequency.
5. according to the method described in claim 2, it is characterized in that, cause the NFC for the NFC device configurable clock generator parameter
Device exports multiple frequencies respectively, including：
By configuring different timing parameters so that centre frequency of the NFC device based on setting is distinguished with default step-length
Export multiple setpoint frequencies.
6. according to the method described in claim 5, it is characterized in that, the NFC device under each setpoint frequency is detected respectively
Antenna couples energy state, including one below：
The load modulation amplitude of the NFC device under each setpoint frequency is detected respectively；
The standing-wave ratio of the transmitting signal of the NFC device under each setpoint frequency is detected respectively；
The output voltage values of the NFC device under each setpoint frequency are detected respectively.
7. according to the method described in claim 5, it is characterized in that, according to the antenna couple energy state, will be the multiple
A setpoint frequency in setpoint frequency is locked as the working frequency of the NFC device, including：
Compare the load modulation amplitude of the NFC device under each setpoint frequency, corresponding with maximum load modulation amplitude will set
It is the working frequency for stating NFC device to determine Frequency Locking.
8. according to the method described in claim 5, it is characterized in that, according to the antenna couple energy state, will be the multiple
A setpoint frequency in setpoint frequency is locked as the working frequency of the NFC device, including：
Compare the standing-wave ratio of the transmitting signal of the NFC device under each setpoint frequency, it will be with minimum standing wave than corresponding setting
Frequency Locking is the working frequency for stating NFC device.
9. according to the method described in claim 5, it is characterized in that, according to the antenna couple energy state, will be the multiple
A setpoint frequency in setpoint frequency is locked as the working frequency of the NFC device, including：
Compare the output voltage values of the NFC device under each setpoint frequency, it will setpoint frequency lock corresponding with minimum amount of voltage that
It is set to the working frequency for stating NFC device.
10. a kind of NFC working frequencies determining device, which is characterized in that including：
Configuration module, for configuring matching network corresponding with the setpoint frequency according to the setpoint frequency of NFC device；
Detection module, for detecting the antenna of NFC device coupling energy state；
Determining module determines the working frequency of the NFC device according to antenna coupling energy state.
11. device according to claim 10, which is characterized in that configuration module includes：
First dispensing unit, for for the NFC device configurable clock generator parameter NFC device being caused to export multiple settings respectively
Frequency；
Second dispensing unit, for corresponding matching network to be respectively configured according to the multiple setpoint frequency.
12. according to the devices described in claim 11, which is characterized in that the setpoint frequency to be multiple,
The detection module is additionally operable to detect the antenna coupling energy state of the NFC device under each setpoint frequency respectively；
The determining module is additionally operable to couple energy state according to the antenna, one in the multiple setpoint frequency is set
Determine the working frequency that Frequency Locking is the NFC device.
13. device according to claim 12, which is characterized in that
The configuration module is additionally operable to after the working frequency for locking the NFC device in the determining module, configuration with it is described
Working frequency configures corresponding matching network.
14. according to the devices described in claim 11, which is characterized in that
First dispensing unit is additionally operable to by configuring different timing parameters so that the NFC device is based in setting
Frequency of heart exports multiple setpoint frequencies respectively with default step-length.
15. device according to claim 14, the detection module includes at least one of：
First detection unit, for detecting the load modulation amplitude of the NFC device under each setpoint frequency respectively；
Second detection unit, for detecting the standing-wave ratio of the transmitting signal of the NFC device under each setpoint frequency respectively；
3rd detection unit, for detecting the output voltage values of the NFC device under each setpoint frequency respectively.
16. device according to claim 15, which is characterized in that the determining module includes at least one of：
First determination unit.It, will be with maximum load for comparing the load modulation amplitude of the NFC device under each setpoint frequency
The corresponding setpoint frequency of modulation amplitude is locked as stating the working frequency of NFC device；
Second determination unit, will be with minimum for comparing the standing-wave ratio of the transmitting signal of the NFC device under each setpoint frequency
The corresponding setpoint frequency of standing-wave ratio is locked as stating the working frequency of NFC device；
3rd determination unit, will be with minimum amount of voltage that for comparing the output voltage values of the NFC device under each setpoint frequency
Corresponding setpoint frequency is locked as stating the working frequency of NFC device.
17. a kind of NFC identification devices, which is characterized in that including NFC chip, controller, matching network module and NFC antenna mould
Block, wherein,
The NFC chip, including clock circuit, for described by configuring different timing parameters for the clock circuit
NFC device exports multiple default working frequencies；
The controller, for respectively being matched somebody with somebody the matching network module and the NFC antenna module according to the timing parameter
Put operating mode corresponding with the working frequency；
The matching network module is connected between the NFC chip and the NFC antenna module, in the controller
Control under the interactive signal between the NFC chip and the NFC antenna module is filtered, matched and tuned.
18. device according to claim 17, which is characterized in that wherein, the clock source of the clock circuit is the NFC
The internal clock source of chip is external clock reference.
19. device according to claim 17, which is characterized in that further include：
Detection circuit, for detecting the antenna of the NFC device under multiple default working frequencies coupling energy state respectively.
20. device according to claim 19, which is characterized in that the detection circuit is one of the following：
For detecting the detection circuit of the load modulation amplitude in the NFC chip；
For detecting the standing wave detection circuit of the standing-wave ratio of the NFC antenna module transmitting signal；
For detecting the rectification circuit of the output voltage values of the NFC identification devices.
21. device according to claim 17, which is characterized in that the NFC antenna module includes NFC days of one below
Line：Wire coil, pasted sheet type antenna, adjustable antenna.
22. a kind of storage medium, which is characterized in that the storage medium includes the program of storage, wherein, when described program is run
Method any one of perform claim requirement 1 to 9.
23. a kind of processor, which is characterized in that the processor is used for operation program, wherein, right of execution when described program is run
Profit requires the method any one of 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711339663.6A CN108055089B (en) | 2017-12-14 | 2017-12-14 | Method and device for determining working frequency of NFC device |
| PCT/CN2018/107238 WO2019114363A1 (en) | 2017-12-14 | 2018-09-25 | Method and device for determining operating frequency of nfc device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711339663.6A CN108055089B (en) | 2017-12-14 | 2017-12-14 | Method and device for determining working frequency of NFC device |
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| CN108055089B CN108055089B (en) | 2021-01-22 |
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| WO (1) | WO2019114363A1 (en) |
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| WO2019114363A1 (en) * | 2017-12-14 | 2019-06-20 | 中兴通讯股份有限公司 | Method and device for determining operating frequency of nfc device |
| CN110197093A (en) * | 2019-05-14 | 2019-09-03 | 惠州Tcl移动通信有限公司 | Mobile terminal NFC reader communication control method, storage medium and terminal |
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| CN111586657A (en) * | 2020-04-29 | 2020-08-25 | Oppo（重庆）智能科技有限公司 | Near field communication method, device, storage medium and mobile terminal |
| CN111600649A (en) * | 2020-06-02 | 2020-08-28 | 中国科学院国家授时中心 | Frequency signal on-line monitoring switching equipment |
| CN112395894A (en) * | 2019-08-16 | 2021-02-23 | 华为技术有限公司 | Communication method and device based on NFC |
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Also Published As
| Publication number | Publication date |
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| WO2019114363A1 (en) | 2019-06-20 |
| CN108055089B (en) | 2021-01-22 |
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