CN108205636A - Multichannel NFC device and system - Google Patents
Multichannel NFC device and system Download PDFInfo
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- CN108205636A CN108205636A CN201611185627.4A CN201611185627A CN108205636A CN 108205636 A CN108205636 A CN 108205636A CN 201611185627 A CN201611185627 A CN 201611185627A CN 108205636 A CN108205636 A CN 108205636A
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- 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
- G06K7/10118—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 the sensing being preceded by at least one preliminary step
- G06K7/10148—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 the sensing being preceded by at least one preliminary step the step consisting of dynamically tuning the resonant circuit of the interrogation device that is emitting the interrogation signal, e.g. for impedance matching inside of the interrogation device
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- 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
- G06K7/10019—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 resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers.
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- Computer Networks & Wireless Communication (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The invention discloses a kind of multichannel NFC device and system, described device includes primary coil；Secondary coil, secondary coil are coupled with primary coil；N number of three-level coil, N number of three-level coil are connected with secondary coil；Control unit, control unit is connected with primary coil, wherein, when any one coil in N number of three-level coil of contactless smart card, contactless smart card feeds back to secondary coil by being coupled with the coil data-signal is converted to electromagnetic signal, and pass through secondary coil and coupled with primary coil electromagnetic signal is fed back to primary coil and electromagnetic signal is fed back to control unit by primary coil, control unit obtains data-signal according to electromagnetic signal.The task of swiping the card can be also completed in different positions, and when needs increase and swipe the card position, only need to increase three-level coil so as to fulfill same device, thus considerably reduce the cost of system.
Description
Technical field
The present invention relates to field of communication technology, more particularly to a kind of multichannel NFC device, a kind of multichannel NFC system.
Background technology
Radio frequency identification is a kind of wireless communication technique, can identify specific objective by radio signals and read and write dependency number
According to, without establishing machinery or optical contact between identifying system and specific objective, and identification process is without manual intervention,
As the wireless version of bar code, it is excellent to have that waterproof, high temperature resistant, service life are long, storage data capacity is big, label can be encrypted etc.
Point is widely used in the fields such as enterprise, traffic, medical treatment.
NFC (Near Field Communication, near-field communication) technology is developed by Radio Frequency Identification Technology, is
A kind of radiotechnics of short distance high frequency, can be identified in short distance with compatible equipment and data exchange, for example, traffic
Mechanism of swiping the card in transport etc..But when being installed and used to NFC device, sometimes by space, installation site etc.
Influence, be unfavorable for user's use, and when need to increase swipe the card position when, need to increase complete NFC device, considerably increase and be
System cost.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, an object of the present invention is to provide a kind of multichannel NFC device, same device can be realized in difference
Position can also complete the task of swiping the card, and when need to increase swipe the card position when, only need to increase three-level coil, thus significantly drop
The low cost of system.
It is another object of the present invention to propose a kind of multichannel NFC system.
To achieve the above object, one aspect of the present invention embodiment proposes a kind of multichannel NFC device, including：Primary line
Circle；Secondary coil, the secondary coil are coupled with the primary coil；N number of three-level coil, N number of three-level coil with
The secondary coil is connected, wherein, N is the integer more than 1；Control unit, described control unit are connected with the primary coil,
Wherein, when any one coil in N number of three-level coil of contactless smart card, the contactless smart card passes through
It is coupled with the coil and feeds back to the secondary coil, and pass through the secondary wire so that data-signal is converted to electromagnetic signal
Circle is coupled the electromagnetic signal feeding back to the primary coil and by the primary line with the primary coil
The electromagnetic signal is fed back to described control unit by circle, and described control unit obtains the data according to the electromagnetic signal and believes
Number.
Multichannel NFC device according to embodiments of the present invention, when contactless smart card is arbitrary in N number of three-level coil
During one coil, contactless smart card is fed back to time by being coupled with the coil with data-signal is converted to electromagnetic signal
Grade coil, and pass through secondary coil and coupled electromagnetic signal feeding back to primary coil and by first with primary coil
Electromagnetic signal is fed back to control unit by grade coil, and control unit obtains data-signal according to electromagnetic signal, so as to fulfill same
Device can also complete the task of swiping the card in different positions, and when needs increase and swipe the card position, only need to increase three-level coil, because
And considerably reduce the cost of system.
According to one embodiment of present invention, when the contactless smart card is arbitrary in N number of three-level coil
During one coil, the contactless smart card obtains energy from the coil, to give the chip power supply of the contactless smart card.
According to one embodiment of present invention, series system or parallel way phase are used between N number of three-level coil
Even, it is connected between N number of three-level coil and the secondary coil using series system or parallel way.
According to one embodiment of present invention, each three-level coil in N number of three-level coil is with being respectively connected
Capacitance forms LC oscillation circuits.
According to one embodiment of present invention, above-mentioned multichannel NFC device, further includes：Matching unit, the matching are single
Member is arranged between the primary coil and described control unit, and the matching unit is used to make the primary coil and described time
Grade coil carries out coupled resonance to obtain the electromagnetic signal.
Further, the matching unit includes：First capacitance, one end of first capacitance and described control unit
First end is connected；Second capacitance, one end of second capacitance respectively with the other end of first capacitance and the primary line
One end of circle is connected, the other end ground connection of second capacitance；Third capacitance, a termination of the third capacitance is describedly；The
Four capacitances, one end of the 4th capacitance other end phase with the other end of the third capacitance and the primary coil respectively
Even, the other end of the 4th capacitance is connected with the second end of described control unit.
According to one embodiment of present invention, above-mentioned multichannel NFC device, further includes：Filter unit, the filtering are single
Member is arranged between the matching unit and described control unit, and the filter unit is used to be filtered the electromagnetic signal
Processing.
According to one embodiment of present invention, described control unit includes anti-collision processor, the anti-collision processor
For when multiple contactless smart cards are close to N number of three-level coil, to multiple electromagnetic signals for receiving at line delay
Reason.
According to one embodiment of present invention, above-mentioned multichannel NFC device, further includes：Display unit, the display are single
Member is connected with described control unit, and described control unit is by controlling the display unit to show the data-signal.
To achieve the above object, another aspect of the present invention embodiment proposes a kind of multichannel NFC system, including：It is non-to connect
Touch smart card；Above-mentioned multichannel NFC device.
The multichannel NFC system of the embodiment of the present invention by above-mentioned multichannel NFC device, can realize same device
The task of swiping the card can be also completed in different positions, and when needs increase and swipe the card position, need to only increase three-level coil, thus it is big
The amplitude reduction cost of system.
Description of the drawings
Fig. 1 is the block diagram of multichannel NFC device according to embodiments of the present invention；
Fig. 2 is the connection diagram of N number of three-level coil according to an embodiment of the invention；
Fig. 3 is the connection diagram of N number of three-level coil in accordance with another embodiment of the present invention；
Fig. 4 is the partial circuit diagram of multichannel NFC device according to an embodiment of the invention；
Fig. 5 is the partial circuit diagram of multichannel NFC device in accordance with another embodiment of the present invention；
Fig. 6 is the block diagram according to the multichannel NFC device of a specific example of the invention；
Fig. 7 is the block diagram of multichannel NFC system according to embodiments of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
The multichannel NFC device proposed according to embodiments of the present invention, multichannel NFC system described with reference to the accompanying drawings.
Fig. 1 is the block diagram of multichannel NFC device according to embodiments of the present invention.As shown in Figure 1, the multichannel
NFC device may include primary coil 110, secondary coil 120, N number of three-level coil 130 (wherein, N is the integer more than 1) and control
Unit 140 processed.
Wherein, secondary coil 120 is coupled with primary coil 110, N number of three-level coil 130 and 120 phase of secondary coil
Even, control unit 140 is connected with primary coil 110.When contactless smart card 200 is any one in N number of three-level coil 130
During a coil, contactless smart card 200 is fed back to by being coupled with the coil with data-signal is converted to electromagnetic signal
Secondary coil 120, and pass through secondary coil 120 and coupled electromagnetic signal feeding back to primary coil with primary coil 110
110 and electromagnetic signal is fed back to by control unit 140 by primary coil 110, control unit 140 is obtained according to electromagnetic signal
Obtain data-signal.
Specifically, the single coil in traditional NFC reader can be designed to coil group or coil network, the coil
Group or coil network can be made of 110, secondary coils 120 of a primary coil and N number of three-level coil 130, wherein, it is N number of
Three-level coil 130 can be distributed in different positions as needed.When contactless smart card 200 or NFC device close to these three
Grade coil in any one coil when, contactless smart card 200 or NFC device will be coupled with the three-level coil, with
The data-signal of contactless smart card 200 or NFC device is fed back to by secondary coil 120, secondary coil 120 by electromagnetic mode
By being coupled with primary coil 110, by the electromagnetic signal transmission of feedback to primary coil 110, control unit 140 is according to first
The electromagnetic signal of grade coil 110 obtains data-signal, so as to action of completing to swipe the card.
In an embodiment of the present invention, due to being provided with N number of three-level coil, and N number of three-level coil can be according to practical need
It is arranged at different positions, when contactless smart card is close to one of three-level coil, is by the three-level coil
Action of swiping the card can be completed, the task of swiping the card can be also completed in different positions so as to fulfill same NFC device so that is originally complicated
Installation becomes very simple, and great convenience is brought, and when needs increase and swipe the card position, only need to increase three-level to user's life
Coil without increasing a whole set of swiping card equipment, considerably reduces the cost of system.
Further, according to one embodiment of present invention, when contactless smart card 200 is in N number of three-level coil 130
Any one coil when, contactless smart card 200 obtains energy from the coil, to give the chip of contactless smart card 200
Power supply.
Specifically, unpowered power supply usually in contactless smart card 200, and NFC device is after the power is turned on, control unit 140
Exportable electric energy provides electric energy by primary coil 110 to primary coil 110 to N number of three-level coil 130.Work as non-contact intelligent
During 200 any one coil in N number of three-level coil 130 of card, due to being stored with electric energy in N number of three-level coil 130, because rather than
Contact smart card 200 can obtain energy, and transfer this energy to non-contact intelligence by coupling from N number of three-level coil 130
200 chip can be blocked, to give the chip power supply.When chip obtains it is electric after, the chip outputting data signals, and by with three-level coil
It is coupled, data-signal is fed back to secondary coil 120 by electromagnetic mode, then passes through secondary coil 120 and primary
Coil 110 is coupled, and data-signal is fed back to control unit 140, control unit 140 is by being detected electromagnetic signal
To obtain the data-signal of feedback, so as to correctly read the related data information of contactless smart card 200.Therefore, pass through electromagnetism
Coupled modes can realize the power supply of contactless smart card so that contactless smart card can work normally, and without built-in power supply
Power supply.
In an embodiment of the present invention, between N number of three-level coil 130 series system, can be used or parallel way is connected,
Series system can be used between N number of three-level coil 130 and secondary coil 120 or parallel way is connected.
Specifically, it is attached as shown in Fig. 2, series system can be used between N number of three-level coil 130, with three three
For grade coil, one end P11 of the first three-level coil 1# is connected with the other end P22 of the second three-level coil 2#, the second three-level line
One end P21 of circle 2# is connected with the other end P32 of third three-level coil 3#.Further, when three three-level coils 130 and secondary
When coil 120 is connected, the other end P12 of the first three-level coil 1# is connected with one end of secondary coil 120, third three-level coil 3#
One end P31 be connected with the other end of secondary coil 120.
Be attached as shown in figure 3, parallel way can be used between N number of three-level coil 130, using three three-level coils as
Example, one end P11 of the first three-level coil 1#, the second three-level coil 3# one end P21 one end with third three-level coil 3# respectively
P31 is connected, the other end P12 of the first three-level coil 1#, the second three-level coil 2# other end P22 respectively with third three-level coil
The other end P32 of 3# is connected.Further, when three three-level coils 130 are in parallel with secondary coil 120, third three-level coil
One end P31 of 3# is connected with one end of secondary coil 120, and the other end P32 of third three-level coil 3# is another with secondary coil 120
One end is connected.
That is, it is believed that secondary coil is one of coil of N number of three-level coil, only by the three-level coil
It is coupled with primary coil.In practical applications, cascaded structure or parallel-connection structure can be selected as needed, do not done here specifically
Limitation.
According to one embodiment of present invention, electricity of each three-level coil in N number of three-level coil 130 with being respectively connected
Hold and form LC oscillation circuits.
Specifically, as shown in figure 4, when the LC that coil L7 and capacitance Cp compositions are provided in contactless smart card 200 shakes
When swinging circuit, N number of three-level coil 130 is also accordingly arranged to LC oscillation circuits, to realize contactless smart card 200 and three-level coil
Between coupling and resonance.
As shown in figure 4, using parallel-connection structure and N number of three-level coil 130 and secondary coil between N number of three-level coil 130
Using for parallel-connection structure between 120.One end of secondary coil 120 can pass through one end of capacitance C31 and the first three-level coil 1#
It is connected, one end of the first three-level coil 1# is also connected by capacitance C41 with one end of the second three-level coil 2# ..., N-1 three-levels
One end of coil N-1# is also connected by capacitance Cn1 with one end of N three-level coils N#；The other end of secondary coil 120 and electricity
The one end for holding C32 is connected, and the other end of the first three-level coil 1# is connected with one end of capacitance C42, and the second three-level coil 2#'s is another
One end is connected with one end of capacitance C52 ..., and the other end of N-1 three-level coils N-1# is connected with one end of capacitance Cn2, N tri-
The other end of grade coil N#, the other end of capacitance C32, the other end of capacitance C42, capacitance C52 the other end ..., capacitance Cn2
The other end is grounded GND after being connected.
Wherein, the first three-level coil 1# and capacitance C42 forms LC oscillation circuits, the second three-level coil 2# and capacitance C52 structures
Into LC oscillation circuits, N-1 three-level coil N-1# and capacitance Cn2 forms LC oscillation circuits, N three-level coil N# and capacitance Cn1
Form LC oscillation circuits.In practical applications, by select suitable capacitance (including capacitance C31, C41 ..., Cn1, C32,
C42 ..., Cn2) so that each three-level coil is matched with the resonant frequency (such as 13.56MHz) of contactless smart card 200, with
It realizes coupled resonance, ensures the correct transmission of electromagnetic signal.
According to one embodiment of present invention, as shown in figure 4, above-mentioned multichannel NFC device may also include matching unit
150, matching unit 150 is arranged between primary coil 110 and control unit 140, and matching unit 150 is used to make primary coil
110 carry out coupled resonance to obtain electromagnetic signal with secondary coil 120.
Specifically, in order to ensure effective transmission of the electromagnetic signal between primary coil and secondary coil, it is single in control
Matching unit 150 is additionally provided between member 140 and primary coil 110, it can primary coil 110 by matching unit 150
It is realized between secondary coil 120 and couples simultaneously resonance, to meet the matching demand of system, ensure the correct transmission of electromagnetic signal.
According to one embodiment of present invention, as shown in figure 4, matching unit 150 may include the first capacitance C1, the second capacitance
C2, third capacitance C3 and the 4th capacitance C4.Wherein, one end of the first capacitance C1 is connected with the first end of control unit 140, and second
The one end of one end of capacitance C2 respectively with the other end of the first capacitance C1 and primary coil 110 is connected, and the second capacitance C2's is another
One end ground connection GND of end ground connection GND, third capacitance C3, one end of the 4th capacitance C4 respectively with the other end of third capacitance C3 and
The other end of primary coil 110 is connected, and the other end of the 4th capacitance C4 is connected with the second end of control unit 140.
Preferably, the capacitance of the first capacitance C1 and the 4th capacitance C4 can be equal, the appearance of the second capacitance C2 and third capacitance C3
Value can be equal.
Further, according to one embodiment of present invention, as shown in figure 4, above-mentioned multichannel NFC device may also include
Filter unit 160, filter unit 160 are arranged between matching unit 150 and control unit 140, and filter unit 160 is used for electricity
Magnetic signal is filtered, so as to filter unnecessary wave band.
Specifically, as shown in figure 4, filter unit 160 may include the first inductance L1, the second inductance L2, the 5th capacitance C5 and
6th capacitance C6.Wherein, one end of the first inductance L1 is connected with the first end of control unit 140, one end point of the 5th capacitance C5
One end not with the other end of the first inductance L1, the first capacitance C1 is connected, and one end of the 6th capacitance C6 is another with the 5th capacitance C5's
One end is grounded GND after being connected, one end of the second inductance L2 respectively with the other end of the 6th capacitance C6, the other end of the 4th capacitance C4
It is connected, the other end of the second inductance L2 is connected with the second end of control unit 140.
Preferably, the inductance value of the first inductance L1 and the second inductance L2 can be equal, the 5th capacitance C5 and the 6th capacitance C6's
Capacitance can be equal.For example, the inductance value of the first inductance L1 and the second inductance L2 can take 390nH~1uH, then according to formulaThe capacitance of the 5th capacitance C5 and the 6th capacitance C6 can be calculated.In the formula, C0Represent the 5th capacitance C5 and
The capacitance of 6th capacitance C6, L0Represent the inductance value of the first inductance L1 and the second inductance L2, fr0Represent resonant frequency, such as
13.56MHz。
Similarly, the first capacitance C1, the second capacitance C2, the electricity of third capacitance C3 and the 4th can also be calculated through the above way
Hold the best capacitance of C4, to reach best match effect.
It should be noted that in practical applications, it is possible to multiple contactless smart cards 200 occur simultaneously close to N number of three
The situation of grade coil 130, such as more people swipe the card simultaneously in different location, therefore, in an embodiment of the present invention, can pass through erosion control
Prominent treatment mechanism is swiped the card caused collision problem simultaneously to avoid different location.
According to one embodiment of present invention, control unit 140 may include anti-collision processor (not specifically illustrated in figure),
Anti-collision processor is used for when multiple contactless smart cards 200 are close to N number of three-level coil 130, to the multiple electromagnetism received
Signal carries out delay process.
Specifically, during actually swiping the card, even swiping the card simultaneously in different positions, can also exist in time
Smaller difference, i.e., it is also that there are sequencings to swipe the card simultaneously.Therefore, when multiple contactless smart cards 200 are close to N number of three-level
During any number of coils in coil 130, to the electromagnetic signal received processing can be numbered, and set in anti-collision processor
Corresponding delay time, then, control unit 140 sequentially in time carry out one by one the electromagnetic signal received according to number
Processing so as to effectively avoid the conflict between data-signal, ensures that the signal of each contactless smart card can correctly be connect
It receives and handles.
According to one embodiment of present invention, as shown in figure 5, above-mentioned multichannel NFC device may also include display unit
170, display unit 170 is connected with control unit 140, and control unit 140 carries out data-signal by control display unit 170
Display.
Specifically, after control unit 140 receives electromagnetic signal, electromagnetic signal is handled to obtain number letter
Number, the digital signal is then converted into identifiable word or symbol, and pass through display unit 170 and shown.Wherein, it shows
It can be liquid crystal display to show unit 170.
In an embodiment of the present invention, as shown in figure 5, above-mentioned multichannel NFC device further includes power module 180, electricity
Source module 180 is used to power to control unit 140.Wherein, power module 180 can be linear power supply or Switching Power Supply, with
Regulated power supply needed for being provided to whole device.
Illustrate multichannel NFC device of the embodiment of the present invention into one with reference to a specific example.
As shown in fig. 6, NFC device may include that primary coil 110, secondary coil 120, N number of three-level coil 130, control are single
Member 140, matching unit 150, filter unit 160, display unit 170 and power module 180, wherein, control unit 140 can be into one
Step includes NFC controls chip 141, signal amplifier 142, signal control processor 143 and microprocessor 144.
As shown in fig. 6, N number of three-level coil 130 is connected with secondary coil 120, secondary coil 120 and primary coil 110 into
Row coupling, primary coil 110 is connected with matching unit 150 and filter unit 160, matching unit 150 and filter unit 160 and
The electromagnetic signal test side of NFC control chips 141 is connected, and the electromagnetic signal output terminal of NFC control chips 141 is amplified by signal
Device is connected with signal control processor 143.NFC control chip 141 also respectively with signal control processor 143 and microprocessor
144 are connected, and three-level number of coils setting value and signal port detection case are sent at signal control by NFC control chips 141
Device 143 is managed, and anti-collision processing signal is sent to signal control processor 143 and microprocessor 144.
Microprocessor 144 is connected respectively with signal control processor 143 and display unit 170.Power module 180 and signal
Control processor 143 be connected, signal control processor 143 to be given to power, and it is converted after, respectively to microprocessor 144,
NFC controls chip 141 and display unit 170 to power.
When any one coil in N number of three-level coil 130 of contactless smart card 200, contactless smart card 200
Energy is obtained from N number of three-level coil 130, to give the chip power supply of itself.Chip obtain it is electric after, chip outputting data signals,
And pass through oscillation circuit and couple simultaneously resonance with the oscillation circuit of three-level coil, data-signal is fed back by electromagnetic mode
To secondary coil 120, then, under the action of matching unit 150, primary coil 110 is coupled and humorous with secondary coil 120
It shakes, to receive the electromagnetic signal of secondary coil 120, and after passing through 160 filtering process of filter unit, feeds back to NFC control chips
141。
NFC control chip 141 after electromagnetic signal is received, detected whether by built-in anti-collision processor be currently
One contactless smart card 200 is close to N number of three-level coil 130.If it is, delay process is not done, directly by the electromagnetic signal
After 142 enhanced processing of signal amplifier, it is transferred to signal control processor 143 and (due to the requirement of multichannel communication, enters
Signal to signal control processor 143 can be amplified processing by signal amplifier 142).Signal control processor 143 will
The signal is converted to digital signal, and sends it to microprocessor 144.Microprocessor 144 converts the digital signal,
It to export identifiable word and symbol, is then shown by display unit 170, so as to intuitively reflect non-contact intelligent
The data-signal of 200 feedback of card and the communication conditions with contactless smart card 200.
And if there is multiple contactless smart cards 200 are simultaneously close to N number of three-level coil 130, then NFC is controlled in chip 141
Anti-collision processor delay process is carried out to the electromagnetic signal that receives, and delay process result is sent at signal control
Device 143 and microprocessor 144 are managed, to ensure the correct conversion of signal and rational display.It for example, can be in first data-signal
After display, next data-signal is shown after the 2s that is delayed.So as to fulfill same device different location multichannel swipe the card appoint
It is engaged in, and can effectively avoid data collision problem when different location is swiped the card simultaneously by anti-collision treatment mechanism.
When needs, which increase, swipes the card position, it is only necessary to increase the number of three-level coil, particularly, when environment is more special
When, such as when external interference signal is stronger, corresponding match circuit can also be increased, to ensure effective biography of electromagnetic signal
It passs.
It should be noted that Fig. 4-Fig. 6 is only the specific example provided, and three-level coil, three-level coil and secondary coil,
Other structures shape also can be used in primary coil and the concrete structure of match circuit, match circuit, filter circuit and control unit
Formula as long as can ensure effective transmission of the electromagnetic signal between each coil, is not limited specifically here.
In conclusion multichannel NFC device according to embodiments of the present invention, multichannel NFC according to embodiments of the present invention
Device, when any one coil in N number of three-level coil of contactless smart card, contactless smart card by with the coil
It is coupled and feeds back to secondary coil so that data-signal is converted to electromagnetic signal, and passed through secondary coil and carried out with primary coil
Coupling is controlled so that electromagnetic signal is fed back to primary coil and electromagnetic signal is fed back to control unit by primary coil
Unit obtains data-signal according to electromagnetic signal, and the task of swiping the card can be also completed in different positions so as to fulfill same device, and
And when needs increase and swipe the card position, three-level coil only need to be increased, thus considerably reduce the cost of system.
Fig. 7 is the block diagram of multichannel NFC system according to embodiments of the present invention.As shown in fig. 7, the multichannel
NFC system may include：Contactless smart card 200 and above-mentioned multichannel NFC device 100, wherein, contactless smart card 200 with
The matching setting of multichannel NFC device 100, for example, when using LC oscillation circuits shown in Fig. 4 in contactless smart card 200, it is more
LC oscillation circuits shown in Fig. 4 can be used in three-level coil in channel NFC device 100, to realize coupling between the two and humorous
It shakes, ensures effective transmission of electromagnetic signal.
Multichannel NFC system according to embodiments of the present invention by above-mentioned multichannel NFC device, can be realized same
Device can also complete the task of swiping the card in different positions, and when needs increase and swipe the card position, only need to increase three-level coil, because
And considerably reduce the cost of system.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be based on orientation shown in the drawings or
Position relationship is for only for ease of the description present invention and simplifies description rather than instruction or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, " multiple " are meant that at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be that machinery connects
It connects or is electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature right over second feature or oblique upper or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments "
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It is combined in an appropriate manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the different embodiments or examples described in this specification and the feature of different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (10)
1. a kind of multichannel NFC device, which is characterized in that including：
Primary coil；
Secondary coil, the secondary coil are coupled with the primary coil；
N number of three-level coil, N number of three-level coil are connected with the secondary coil, wherein, N is the integer more than 1；
Control unit, described control unit are connected with the primary coil, wherein, when contactless smart card is close to described N number of three
Grade coil in any one coil when, the contactless smart card with the coil by being coupled to convert data-signal
The secondary coil is fed back to for electromagnetic signal, and passes through the secondary coil and is coupled with the primary coil with described in inciting somebody to action
Electromagnetic signal feeds back to the primary coil and the electromagnetic signal is fed back to the control list by the primary coil
Member, described control unit obtain the data-signal according to the electromagnetic signal.
2. multichannel NFC device as described in claim 1, which is characterized in that when the contactless smart card is close to described N number of
During any one coil in three-level coil, the contactless smart card obtains energy from the coil, described non-contact to give
The chip power supply of smart card.
3. multichannel NFC device as claimed in claim 1 or 2, which is characterized in that using string between N number of three-level coil
Either parallel way is connected between N number of three-level coil and the secondary coil using series system or in parallel connection mode
Mode is connected.
4. multichannel NFC device as described in claim 1, which is characterized in that each three-level line in N number of three-level coil
Circle forms LC oscillation circuits with the capacitance being respectively connected.
5. multichannel NFC device as described in claim 1, which is characterized in that further include：
Matching unit, the matching unit are arranged between the primary coil and described control unit, and the matching unit is used
In the primary coil and the secondary coil is made to carry out coupled resonance to obtain the electromagnetic signal.
6. multichannel NFC device as claimed in claim 5, which is characterized in that the matching unit includes：
First capacitance, one end of first capacitance are connected with the first end of described control unit；
Second capacitance, one end of second capacitance one end with the other end of first capacitance and the primary coil respectively
It is connected, the other end ground connection of second capacitance；
Third capacitance, a termination of the third capacitance is describedly；
4th capacitance, one end of the 4th capacitance are another with the other end of the third capacitance and the primary coil respectively
End is connected, and the other end of the 4th capacitance is connected with the second end of described control unit.
7. multichannel NFC device as claimed in claim 5, which is characterized in that further include：
Filter unit, the filter unit are arranged between the matching unit and described control unit, and the filter unit is used
It is filtered in the electromagnetic signal.
8. multichannel NFC device as described in claim 1, which is characterized in that described control unit includes anti-collision processor,
The anti-collision processor is used for when multiple contactless smart cards are close to N number of three-level coil, to the multiple electricity received
Magnetic signal carries out delay process.
9. multichannel NFC device as described in claim 1, which is characterized in that further include：
Display unit, the display unit are connected with described control unit, and described control unit is by controlling the display unit
The data-signal is shown.
10. a kind of multichannel NFC system, which is characterized in that including：
Contactless smart card；
Multichannel NFC device as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611185627.4A CN108205636A (en) | 2016-12-20 | 2016-12-20 | Multichannel NFC device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611185627.4A CN108205636A (en) | 2016-12-20 | 2016-12-20 | Multichannel NFC device and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108205636A true CN108205636A (en) | 2018-06-26 |
Family
ID=62604088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611185627.4A Pending CN108205636A (en) | 2016-12-20 | 2016-12-20 | Multichannel NFC device and system |
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| CN (1) | CN108205636A (en) |
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