CN114282634A - High-power wireless energy extraction near field communication label - Google Patents
High-power wireless energy extraction near field communication label Download PDFInfo
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Abstract
The invention provides a high-power wireless energy extraction near field communication tag, which comprises: the receiving unit, the rectifying unit, the voltage drop unit and the communication chip are connected in sequence; the receiving unit receives an energy signal in an alternating magnetic field generated by the card reader within a preset distance range and supplies energy to the rectifying unit, the voltage drop unit and the communication chip; the pressure drop unit is used for generating pressure drop; the receiving unit also establishes a wireless data channel with the card reader. According to the high-power wireless energy extraction near field communication tag structure, the energy supply coil and the communication coil in the traditional tag are combined into a whole, the voltage drop unit is additionally arranged between the rectifying unit and the communication chip to generate alternating current voltage drop, consumption of an amplitude limiting circuit in the communication chip in the traditional tag on extracted energy is reduced, and therefore energy extraction efficiency is improved.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a high-rate wireless energy extraction near field communication tag structure.
Background
Some current NFC tag chips can lead out a rectifying pin to provide limited energy outwards, and the energy stays at the level of lighting a light-emitting diode, namely about 10 mA;
patent document 1 discloses an example in which, in order to drive peripheral devices such as a sensor and a motor which consume large current, it is generally adopted to separate a communication coil of NFC and a power supply coil of the peripheral device, which has a disadvantage that the two coils are generally close to each other, and strong coupling occurs, which has a large negative effect on tuning and mass production consistency of a circuit; moreover, the use of two coils further limits the layout of the circuit.
Documents of the prior art
Patent document
Patent document 1: publication CN108718466A
Disclosure of Invention
One of the purposes of the invention is to provide a high-power wireless energy extraction near field communication tag, which is improved on the basis that a coil is arranged on a passive electronic device to supply energy to another coil for communication, and the energy supply coil and a communication coil are combined into a whole, so that the negative influence of strong coupling generated when the two coils are separately arranged and are in a close distance on the tuning and mass production consistency of the whole circuit is avoided, the problem that the two coils have certain limitation on the layout of the whole circuit is also solved, meanwhile, a voltage drop unit is additionally arranged between a rectification unit and a communication chip to generate alternating current voltage drop, the consumption of an amplitude limiting circuit in the communication chip in the traditional tag on the extracted energy is reduced, and the energy extraction efficiency is improved.
The embodiment of the invention provides a high-power wireless energy extraction near field communication tag, which comprises: the receiving unit, the rectifying unit, the voltage drop unit and the communication chip are connected in sequence;
the receiving unit receives an energy signal in an alternating magnetic field generated by the card reader within a preset distance range and supplies energy to the rectifying unit, the voltage drop unit and the communication chip;
the pressure drop unit is used for generating pressure drop;
the receiving unit also establishes a wireless data channel with the card reader.
Preferably, the receiving unit includes: a coil;
the rectifying unit includes: a full wave rectifier;
the pressure drop unit includes: a first resistor and a second resistor;
the communication chip includes: NFC label chip.
Preferably, a first input terminal of the full-wave rectifier is connected to one end of the coil and one end of the first resistor, and a second input terminal of the full-wave rectifier is connected to the other end of the coil and one end of the second resistor;
the other end of the first resistor is connected with the first input end of the NFC label chip, and the other end of the second resistor is connected with the second input end of the NFC label chip.
Preferably, one end of the coil is connected with one end of a first element, and the other end of the first element is connected with a first input end of the full-wave rectifier;
the other end of the coil is connected with one end of a second element, and the other end of the second element is connected with a second input end of the full-wave rectifier;
a first input end of the full-wave rectifier is connected with one end of the first resistor, and the other end of the first resistor is connected with a first input end of the NFC tag chip;
and a second input end of the full-wave rectifier is connected with one end of the second resistor, and the other end of the second resistor is connected with a second input end of the NFC label chip.
The first element includes: one or more combinations of the first inductor, the third resistor and the first capacitor;
the second element includes: one or more combinations of the second inductor, the fourth resistor and the second capacitor.
Preferably, one end of a third element is connected to one end of the coil and the first input end of the full-wave rectifier, and the other end is connected to the other end of the coil and the second input end of the full-wave rectifier;
a first input end of the full-wave rectifier is connected with one end of the first resistor, and the other end of the first resistor is connected with a first input end of the NFC tag chip;
a second input end of the full-wave rectifier is connected with one end of the second resistor, and the other end of the second resistor is connected with a second input end of the NFC tag chip;
the third element includes: one or more of the third inductor, the fifth resistor and the third capacitor.
Preferably, the rectifying unit further includes: one or more combinations of the full-wave rectifier, the half-wave rectifier and the voltage multiplier.
Preferably, the pressure drop unit includes: any two or more of the first resistor, the second resistor, the fourth inductor, the fifth inductor, the fourth capacitor and the fifth capacitor are combined.
Preferably, the communication chip further includes: an RFID chip.
Preferably, the wireless data channel uses an RFID protocol.
Preferably, the receiving unit, the rectifying unit, the voltage drop unit and the communication chip may be integrated on a PCB or FPC board or an etched antenna.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of a high-power wireless energy extraction near field communication tag according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of one embodiment of the present invention;
FIG. 3 is a schematic structural diagram of one embodiment of the present invention;
FIG. 4 is a schematic structural diagram of one embodiment of the present invention;
FIG. 5 is a schematic diagram of an exemplary embodiment of the present invention;
in fig. 5:
l1: card reader coil, L2: tag coil, C1 coordinates the resonant capacitance of the tag coil, D1, D2, D3 and D4: diodes constituting the full-wave rectifier, R1, R2: resistance for generating voltage drop, R3: the equivalent load resistance of the direct current energy generated by rectification.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The embodiment of the invention provides a high-power wireless energy extraction near field communication tag, as shown in fig. 1, comprising: the receiving unit 1, the rectifying unit 2, the voltage drop unit 3 and the communication chip 4 are connected in sequence;
the receiving unit 1 receives an energy signal in an alternating magnetic field generated by a card reader 5 within a preset distance range, and supplies energy to the rectifying unit 2, the voltage drop unit 3 and the communication chip 4;
the pressure drop unit 3 is used for generating pressure drop;
the receiving unit 1 also establishes a wireless data channel with the card reader 5.
The working principle of the technical scheme is as follows:
the label structure consists of a receiving unit 1, a rectifying unit 2, a voltage drop unit 3 and a communication chip 4; the receiving unit 1 is specifically provided with only one coil, when the card reader 5 is within a preset distance range, the coil and the card reader 5 establish a wireless data channel and extract an energy signal from an alternating magnetic field generated by the card reader 5 to supply energy to a rectifying unit 2, a voltage drop unit 3, a communication chip 4 and the like of a circuit; the preset distance range specifically includes: the distance range within which the card reader 5 can normally communicate with the tag; the voltage drop unit 3 is used for generating proper alternating current voltage drop, so that useless consumption of the amplitude limiting circuit in the communication chip 4 on the extracted energy can be reduced; the communication chip 4 is used for processing the communication signal received by the receiving unit 1 and sent by the card reader 5; the label structure is suitable for the working frequency of 100kHz to 100 MHz.
The beneficial effects of the above technical scheme are: the embodiment of the invention improves the traditional technology on the basis of arranging one coil on a passive electronic device for supplying power to the other coil for communication, integrates the power supply coil and the communication coil, avoids the negative influence on the tuning and mass production consistency of the whole circuit caused by strong coupling generated when the two coils are arranged separately and are very close to each other, also solves the problem that the two coils have certain limitation on the layout of the whole circuit, and simultaneously adds the voltage drop unit 3 between the rectifying unit 2 and the communication chip 4 for generating alternating voltage drop, reduces the consumption of the amplitude limiting circuit in the communication chip 4 in the traditional label on the extracted energy, and further improves the efficiency of energy extraction.
The embodiment of the invention provides a high-power wireless energy extraction near field communication tag, wherein a receiving unit 1 comprises: a coil 11;
the rectifying unit 2 includes: a full-wave rectifier 21;
the pressure drop unit 3 includes: a first resistor 31 and a second resistor 32;
the communication chip 4 includes: NFC label chip.
The working principle of the technical scheme is as follows:
the receiving unit 1 is embodied as a coil 11; the coil 11 is a conductor which has two terminals and surrounds a certain area, and when the conductor is in an alternating magnetic field generated by the card reader 5, magnetic flux passing through the surrounding area can be changed, and induced electromotive force, namely an energy signal, can be generated; the coil 11 can also receive a communication signal sent by the card reader 5 and establish a wireless data channel with the card reader 5; the rectifying unit 2 is specifically a full-wave rectifier 21, and can convert alternating current into direct current; the voltage drop unit 3 is specifically a resistor and is used for generating an alternating current voltage drop; the communication chip 4 is specifically an NFC tag chip.
The beneficial effects of the above technical scheme are: the coil 11 of the embodiment of the invention has the energy supply and communication functions, not only can communicate with the card reader 5, but also can supply energy to the coil by using an alternating magnetic field generated by the card reader 5, so that the functionality of a label structure is improved, meanwhile, the voltage drop unit 3 can reduce the consumption of an amplitude limiting circuit in a communication chip on extracting energy, and the efficiency of energy extraction is improved.
The embodiment of the invention provides a high-power wireless energy extraction near field communication tag, as shown in fig. 2, a first input end of a full-wave rectifier 21 is connected with one end of a coil 11 and one end of a first resistor 31, and a second input end of the full-wave rectifier is connected with the other end of the coil 11 and one end of a second resistor 32;
the other end of the first resistor 31 is connected to the first input terminal of the NFC tag chip, and the other end of the second resistor 32 is connected to the second input terminal of the NFC tag chip.
The working principle of the technical scheme is as follows:
the connection relationship of the whole circuit in the internal structure of the tag is specifically as follows: the coil 11 is directly connected in parallel with the full-wave rectifier 21; a first input end of the full-wave rectifier 21 is connected in series with a first resistor 31 and then connected with a first input end of the NFC tag chip; a second input end of the full-wave rectifier 21 is connected in series with a second resistor 32 and then connected with a second input end of the NFC tag chip; the first resistor 31 and the second resistor 32 may generate a certain ac voltage drop.
The beneficial effects of the above technical scheme are: in the internal circuit structure of the tag of the embodiment of the invention, the first resistor 31 and the second resistor 32 can generate a certain alternating voltage drop, so that the consumption of an amplitude limiting circuit in a communication chip on energy extraction is reduced, and the efficiency of energy extraction is improved.
The embodiment of the invention provides a high-power wireless energy extraction near field communication tag, as shown in fig. 3, one end of a coil 11 is connected with one end of a first element 6, and the other end of the first element 6 is connected with a first input end of a full-wave rectifier 21;
the other end of the coil 11 is connected with one end of a second element 7, and the other end of the second element 7 is connected with a second input end of the full-wave rectifier 21;
a first input end of the full-wave rectifier 21 is connected with one end of the first resistor 31, and the other end of the first resistor 31 is connected with a first input end of the NFC tag chip;
a second input end of the full-wave rectifier 21 is connected to one end of the second resistor 32, and the other end of the second resistor 32 is connected to a second input end of the NFC tag chip.
The first element 6 comprises: one or more combinations of the first inductor, the third resistor and the first capacitor;
the second element 7 comprises: one or more combinations of the second inductor, the fourth resistor and the second capacitor.
The working principle of the technical scheme is as follows:
the connection relationship of the whole circuit in the internal structure of the tag can also be as follows: one end of the coil 11 is connected with a first element 6 in series and then is connected with a first input end of the full-wave rectifier 21; the other end of the coil 11 is connected with a second element 7 in series and then is connected with a second input end of the full-wave rectifier 21; a first input end of the full-wave rectifier 21 is connected in series with a first resistor 31 and then connected with a first input end of the NFC tag chip; a second input end of the full-wave rectifier 21 is connected in series with a second resistor 32 and then connected with a second input end of the NFC tag chip; the first element 6 and the second element 7 may be: one or more combinations of inductance, resistance or capacitance.
The beneficial effects of the above technical scheme are: in the internal circuit structure of the tag of the embodiment of the invention, the two ends of the coil 11 are respectively connected in series with the first element 6 and the second element 7 and then connected in parallel with the full-wave rectifier 21, so that the resonance frequency characteristic of the whole circuit can be tuned, and the anti-interference performance of the circuit is improved.
The embodiment of the invention provides a high-power wireless energy extraction near field communication tag, as shown in fig. 4, one end of a third element 8 is connected with one end of a coil 11 and a first input end of a full-wave rectifier 21, and the other end of the third element is connected with the other end of the coil 11 and a second input end of the full-wave rectifier 21;
a first input end of the full-wave rectifier 21 is connected with one end of the first resistor 31, and the other end of the first resistor 31 is connected with a first input end of the NFC tag chip;
a second input end of the full-wave rectifier 21 is connected with one end of the second resistor 32, and the other end of the second resistor 32 is connected with a second input end of the NFC tag chip;
the third element 8 comprises: one or more of the third inductor, the fifth resistor and the third capacitor.
The working principle of the technical scheme is as follows:
the connection relationship of the whole circuit in the internal structure of the tag can also be as follows: the coil 11 is connected in parallel with the third element 8 and then connected in parallel with the full-wave rectifier 21; a first input end of the full-wave rectifier 21 is connected in series with a first resistor 31 and then connected with a first input end of the NFC tag chip; a second input end of the full-wave rectifier 21 is connected in series with a second resistor 32 and then connected with a second input end of the NFC tag chip; the third element 8 may be: one or more combinations of inductance, resistance or capacitance.
The beneficial effects of the above technical scheme are: in the internal circuit structure of the tag, the coil 11 is connected with the third element 8 in parallel and then connected with the full-wave rectifier 21 in parallel, so that the resonant frequency characteristic of the whole circuit can be tuned, and the anti-interference performance of the circuit is improved.
The embodiment of the invention provides a high-power wireless energy extraction near field communication tag, and the rectifying unit 2 further comprises: one or more combinations of the full-wave rectifier 21, the half-wave rectifier and the voltage doubler.
The working principle of the technical scheme is as follows:
the rectifying unit 2 may also be one of a full-wave rectifier 21, a half-wave rectifier and a voltage doubler, or a combination of the full-wave rectifier 21, the half-wave rectifier and the voltage doubler is used to cooperatively perform the task of converting an alternating current into a direct current.
The beneficial effects of the above technical scheme are: the full-wave rectifier 21, the half-wave rectifier and the voltage multiplier can be combined to cooperatively convert alternating current into direct current, so that the capacity and efficiency of converting the alternating current into the direct current of the whole circuit are improved.
The embodiment of the invention provides a high-power wireless energy extraction near field communication label, wherein a voltage drop unit 3 comprises: any two or more of the first resistor 31, the second resistor 32, the fourth inductor, the fifth inductor, the fourth capacitor and the fifth capacitor are combined.
The working principle of the technical scheme is as follows:
the voltage drop unit 3 can also be formed by combining any two or more of a first resistor 31, a second resistor 32, a fourth inductor, a fifth inductor, a fourth capacitor and a fifth capacitor; the resistor may be a pair of resistors, or a pair of capacitors or a pair of inductors, or a pair of capacitors and resistors connected in series, or a pair of capacitors, resistors and inductors connected in series, or other combinations.
The beneficial effects of the above technical scheme are: the voltage drop unit 3 of the embodiment of the invention can be formed by combining any two or more of a first resistor 31, a second resistor 32, a fourth inductor, a fifth inductor, a fourth capacitor and a fifth capacitor, and is used for generating a certain alternating current voltage drop, reducing the consumption of an amplitude limiting circuit in a communication chip on energy extraction and improving the efficiency of energy extraction.
The embodiment of the invention provides a high-power wireless energy extraction near field communication tag, and the communication chip 4 further comprises: an RFID chip.
The working principle of the technical scheme is as follows:
the communication chip 4 may also be a chip that performs one-way or two-way communication using passive energy, such as an RFID chip.
The beneficial effects of the above technical scheme are: the communication chip 4 of the embodiment of the invention can also be a chip such as an RFID chip which adopts passive energy to implement one-way or two-way communication, and enriches the application scenes of the tag structure.
The embodiment of the invention provides a high-power wireless energy extraction near field communication tag, wherein a wireless data channel adopts an RFID protocol.
The working principle of the technical scheme is as follows:
a wireless data channel is established between the receiving unit 1 and the card reader 5; the wireless data channel adopts an RFID (radio frequency identification technology) protocol, such as: NFC protocol (near field communication), 15693, 14443, and other passive communication protocols.
The beneficial effects of the above technical scheme are: the wireless data channel of the embodiment of the invention adopts an NFC protocol or an RFID protocol, helps the tag structure to complete communication interaction with the card reader 5, and enriches the application scenes of the tag structure.
The embodiment of the invention provides a high-power wireless energy extraction near field communication label, wherein a receiving unit 1, a rectifying unit 2, a voltage drop unit 3 and a communication chip 4 can be integrated on a PCB (printed circuit board) or an FPC (flexible printed circuit) board or an etched antenna.
The working principle of the technical scheme is as follows:
the receiving unit 1, the rectifying unit 2, the voltage dropping unit 3 and the communication chip 4 may be integrated on a PCB (printed circuit board) board, or on an FPC (flexible circuit board) board, or on an etched antenna, all in one package.
The beneficial effects of the above technical scheme are: the receiving unit 1, the rectifying unit 2, the voltage drop unit 3 and the communication chip 4 of the embodiment of the invention can be integrated on a PCB (printed circuit board) or an FPC (flexible printed circuit) board or an etching antenna, so that the structural layout of the circuit is optimized.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A high power wireless energy extraction near field communication tag, comprising: the receiving unit, the rectifying unit, the voltage drop unit and the communication chip are connected in sequence;
the receiving unit receives an energy signal in an alternating magnetic field generated by the card reader within a preset distance range and supplies energy to the rectifying unit, the voltage drop unit and the communication chip;
the pressure drop unit is used for generating pressure drop;
the receiving unit also establishes a wireless data channel with the card reader.
2. The high power wireless energy extraction near field communication tag of claim 1, wherein said receiving unit comprises: a coil;
the rectifying unit includes: a full wave rectifier;
the pressure drop unit includes: a first resistor and a second resistor;
the communication chip includes: NFC label chip.
3. The high power wireless energy extraction near field communication tag of claim 2, wherein a first input terminal of said full wave rectifier is connected to one end of said coil and one end of said first resistor, and a second input terminal is connected to the other end of said coil and one end of said second resistor;
the other end of the first resistor is connected with the first input end of the NFC label chip, and the other end of the second resistor is connected with the second input end of the NFC label chip.
4. The high power wireless energy extraction near field communication tag of claim 2, wherein one end of said coil is connected to one end of a first element, the other end of said first element being connected to a first input terminal of said full wave rectifier;
the other end of the coil is connected with one end of a second element, and the other end of the second element is connected with a second input end of the full-wave rectifier;
a first input end of the full-wave rectifier is connected with one end of the first resistor, and the other end of the first resistor is connected with a first input end of the NFC tag chip;
and a second input end of the full-wave rectifier is connected with one end of the second resistor, and the other end of the second resistor is connected with a second input end of the NFC label chip.
The first element includes: one or more combinations of the first inductor, the third resistor and the first capacitor;
the second element includes: one or more combinations of the second inductor, the fourth resistor and the second capacitor.
5. The high power wireless energy extraction near field communication tag of claim 2, wherein a third element has one end connected to one end of said coil and a first input of said full wave rectifier and another end connected to another end of said coil and a second input of said full wave rectifier;
a first input end of the full-wave rectifier is connected with one end of the first resistor, and the other end of the first resistor is connected with a first input end of the NFC tag chip;
a second input end of the full-wave rectifier is connected with one end of the second resistor, and the other end of the second resistor is connected with a second input end of the NFC tag chip;
the third element includes: one or more of the third inductor, the fifth resistor and the third capacitor.
6. The high power wireless energy extraction near field communication tag of claim 2, wherein the rectifying unit further comprises: one or more combinations of the full-wave rectifier, the half-wave rectifier and the voltage multiplier.
7. The high power wireless energy extraction near field communication tag of claim 1, wherein the voltage drop unit comprises: any two or more of the first resistor, the second resistor, the fourth inductor, the fifth inductor, the fourth capacitor and the fifth capacitor are combined.
8. The high power wireless energy extraction near field communication tag of claim 2, wherein said communication chip further comprises: an RFID chip.
9. The high power wireless energy extraction near field communication tag of claim 2, wherein said wireless data channel employs an RFID protocol.
10. The high-power wireless energy extraction near field communication tag of claim 1, wherein the receiving unit, the rectifying unit, the voltage drop unit and the communication chip are integrated on a PCB (printed circuit board) or an FPC (flexible printed circuit) board or an etched antenna.
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| CN202011042307.XA CN114282634A (en) | 2020-09-28 | 2020-09-28 | High-power wireless energy extraction near field communication label |
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| US20070008140A1 (en) * | 2005-06-14 | 2007-01-11 | Mikko Saarisalo | Tag multiplication |
| JP2012063892A (en) * | 2010-09-15 | 2012-03-29 | Ricoh Co Ltd | Battery-less rfid tag with temperature sensor |
| WO2016169462A1 (en) * | 2015-04-20 | 2016-10-27 | 卓捷创芯科技（深圳）有限公司 | Rectifier circuit suitable for amplitude-modulated signal adopting pulse width modulation, and passive radio frequency tag |
| CN106532277A (en) * | 2016-10-27 | 2017-03-22 | 天津大学 | Wireless sensor adopting multi-port tag antenna and solar energy collection function |
| CN212624115U (en) * | 2020-09-28 | 2021-02-26 | 宁波物芯微电子有限公司 | High-power wireless energy extraction near field communication label |
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2020
- 2020-09-28 CN CN202011042307.XA patent/CN114282634A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070008140A1 (en) * | 2005-06-14 | 2007-01-11 | Mikko Saarisalo | Tag multiplication |
| JP2012063892A (en) * | 2010-09-15 | 2012-03-29 | Ricoh Co Ltd | Battery-less rfid tag with temperature sensor |
| WO2016169462A1 (en) * | 2015-04-20 | 2016-10-27 | 卓捷创芯科技（深圳）有限公司 | Rectifier circuit suitable for amplitude-modulated signal adopting pulse width modulation, and passive radio frequency tag |
| CN106532277A (en) * | 2016-10-27 | 2017-03-22 | 天津大学 | Wireless sensor adopting multi-port tag antenna and solar energy collection function |
| CN212624115U (en) * | 2020-09-28 | 2021-02-26 | 宁波物芯微电子有限公司 | High-power wireless energy extraction near field communication label |
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