CN107437107B - RFID label - Google Patents

RFID label Download PDF

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Publication number
CN107437107B
CN107437107B CN201610357280.0A CN201610357280A CN107437107B CN 107437107 B CN107437107 B CN 107437107B CN 201610357280 A CN201610357280 A CN 201610357280A CN 107437107 B CN107437107 B CN 107437107B
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China
Prior art keywords
module
electrically connected
light
energy distribution
voltage
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CN201610357280.0A
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CN107437107A (en
Inventor
王磊
俞军
陈德华
张纲
李清
张沛
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Shanghai Fudan Microelectronics Group Co Ltd
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Shanghai Fudan Microelectronics Group Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

An RFID tag comprises an antenna, an energy distribution module electrically connected with the antenna, an RFID communication and logic control module and a light-emitting module, wherein the RFID communication and logic control module and the light-emitting module are respectively electrically connected with the energy distribution module, and the light-emitting module is electrically connected with the RFID communication and logic control module. According to the invention, the energy entering the RFID communication and logic control module and the light-emitting module is distributed in a coupling mode, the energy distribution module does not consume extra energy, the RFID communication and logic control module is ensured to complete the communication and logic control functions under the condition of obtaining the minimum energy, the residual energy is distributed to the light-emitting module, the coexistence of the energy acquisition and tag chip communication functions required by lighting the light-emitting module under the condition of a single antenna is realized, and the longer communication distance and the lighting distance can be ensured.

Description

RFID label
Technical Field
The invention relates to an RFID (radio frequency identification) tag, in particular to a passive ultrahigh frequency RFID luminescent tag.
Background
With the rise of the internet of things, some practical applications need to solve the problem of positioning of articles, such as cable management and positioning in a construction site, management and positioning of instruments and equipment in a laboratory, management and positioning of articles in a warehouse, management and positioning of books in a library, and the like.
Radio Frequency Identification (abbreviated as RFID) is a new automatic Identification technology developed in the 80 th 20 th century, and is a technology for realizing contactless information transmission by space coupling (alternating magnetic field or electromagnetic field) by using Radio Frequency signals and achieving the purpose of Identification through transmitted information.
The ultrahigh frequency RFID tag is a technology for communicating with a reader-writer by using space electromagnetic waves and is divided into three forms, namely an active tag, a semi-active tag and a passive tag, wherein the passive ultrahigh frequency RFID tag does not need a power supply, is powered by the electromagnetic waves emitted by the reader-writer and communicates with the reader-writer by using a backscattering coupling mode. Generally, the farthest communication distance of the tag is determined by the energy of the electromagnetic wave acquired at the farthest position, and the energy of the electromagnetic wave transmitted by the reader/writer in space and received by the tag can be calculated by the following formula:
Pt=Pr（λ/（4πr））2GtGr
wherein, PtIs the power received by the tag, PrIs the power emitted by the reader/writer, λ is the wavelength of the electric wave, r is the distance from the reader/writer to the tag, GtIs the gain of the tag antenna, GrIs the gain of the reader antenna.
The passive light-emitting tag utilizes the energy of space electromagnetic waves to drive a light-emitting device, such as an LED, on the tag to emit visible light for human eyes to recognize. In practical application, the reader-writer can determine the tags to be lightened, and send out lightening instructions, and the corresponding tags send out visible light, so that the purpose of searching and positioning the articles is achieved.
The application of luminescent tags in fiber management is mentioned in patent CN101680997B, which focuses on introducing a system solution and does not mention a specific solution of luminescent tags, especially the implementation method of passive ultra high frequency RFID visible tags.
Korean patent KR 10-2011-. The solution of the dual antenna is a better solution in a common application scene, but in some application fields requiring the miniaturization of the size of the tag, the two antennas need a larger area, and the miniaturization of the tag cannot be achieved. In addition, the patent mentions that the antenna and the light emitting loop form impedance matching, but does not mention a specific solution to achieve the effect.
The use of super capacitors to store the energy required to light the LEDs is mentioned in chinese patent CN 102982362A. The scheme can enable the label to be lightened more easily, but the size of a common super capacitor is larger and can be compared with a battery, and the miniaturization of the label cannot be achieved. And the super capacitor has the defects of slow charging, large electric leakage and the like, so that various limitations in practical application are caused.
Disclosure of Invention
The invention provides an RFID (radio frequency identification device) tag, which distributes energy entering an RFID communication and logic control module and a light-emitting module in a coupling mode, wherein the energy distribution module does not consume extra energy, ensures that the RFID communication and logic control module completes communication and logic control functions under the condition of obtaining minimum energy, distributes the residual energy to the light-emitting module, realizes the coexistence of energy acquisition and tag chip communication functions required by lighting the light-emitting module under the condition of a single antenna, and can ensure a longer communication distance and a longer lighting distance.
In order to achieve the above object, the present invention provides an RFID tag comprising: the antenna, the energy distribution module electrically connected with the antenna, the RFID communication and logic control module and the light-emitting module which are respectively and electrically connected with the energy distribution module, and the light-emitting module is electrically connected with the RFID communication and logic control module;
the RFID communication and logic control module is used for receiving an instruction signal sent by the reader-writer, and controlling the on-off of the current of the light-emitting module and the magnitude of the current flowing in the light-emitting module after analyzing the instruction, and the light-emitting module is used for giving a visual instruction.
The energy distribution module comprises: the RFID communication and logic control module is electrically connected with the antenna, and the second energy distribution module is electrically connected with the antenna and the light-emitting module to realize energy distribution to the light-emitting module.
The first energy distribution module and the second energy distribution module both comprise: the voltage-stabilizing circuit comprises a voltage-dividing module, a clamping module, a rectifying module and a voltage-stabilizing module;
the voltage dividing module is electrically connected with the antenna, the rectifying module is electrically connected with the voltage dividing module, the voltage stabilizing module is electrically connected with the rectifying module, and the clamping module is electrically connected with the voltage dividing module, or electrically connected with the rectifying module, or electrically connected with the voltage stabilizing module;
the voltage-dividing module distributes energy, current does not flow through the clamping module at the farthest operation distance, the clamping module discharges redundant energy at a short distance, voltage is clamped in an acceptable range, the rectifying module converts an alternating current signal into a direct current signal, and the voltage-stabilizing module stabilizes the signal obtained through rectification in a certain voltage range.
The first energy distribution module at least comprises a voltage division module, and the second energy distribution module at least comprises a rectification module.
The voltage division module adopts a coupling capacitor or a voltage division resistor.
The RFID communication and logic control module comprises: the radio frequency analog module is electrically connected with the energy distribution module, the digital logic module is electrically connected with the radio frequency analog module and the light-emitting module, and the memory is electrically connected with the digital logic module;
the radio frequency analog module comprises: the demodulation module and the modulation module are electrically connected with the energy distribution module, and the clock generation module;
the digital logic module realizes the logic function of the tag chip, completes the coding and decoding of instructions, controls the on-off of the current of the light-emitting module and the magnitude of the current flowing in the light-emitting module, and the memory is used for storing necessary information after power failure.
The RFID communication and logic control module also comprises any one or more of a clamping module, a rectifying module and a voltage stabilizing module; clamping module electric connection voltage division module, rectifier module electric connection clamping module, voltage stabilizing module electric connection rectifier module.
The digital logic module comprises a switch module for controlling the on-off of the current of the light-emitting module.
The switch module is set as an independent module and is electrically connected with the digital logic module and the light-emitting module, and the switch module realizes the on-off of the current of the light-emitting module under the control of the digital logic module.
The RFID tag further comprises: and the impedance matching module is electrically connected with the antenna and the energy distribution module, and the impedance matching module enables the antenna to better receive energy.
The invention adopts a coupling mode to distribute the energy entering the RFID communication and logic control module and the light-emitting module, the energy distribution module does not consume extra energy, and ensures that the RFID communication and logic control module completes the communication and logic control functions under the condition of obtaining the minimum energy, and distributes the residual energy to the light-emitting module, thereby realizing the coexistence of the energy collection required by lighting the light-emitting module and the tag chip communication function under the condition of single antenna, and ensuring the longer communication distance and the lighting distance.
Drawings
Fig. 1 and fig. 2 are schematic circuit diagrams of an RFID tag according to the present invention.
Fig. 3 is a schematic circuit structure diagram of an RFID tag provided in the present invention.
Fig. 4 to 6 are schematic circuit structures of embodiments of the energy distribution module.
Fig. 7 is a schematic diagram of the circuit structure of the RFID communication and logic control module.
Fig. 8 is a schematic diagram of an embodiment of a switch module in a digital logic module.
Detailed Description
The preferred embodiment of the present invention will be described in detail below with reference to fig. 1 to 8.
As shown in fig. 1, the present invention provides an RFID tag comprising: the antenna comprises an antenna 1, an energy distribution module 2 electrically connected with the antenna 1, an RFID communication and logic control module 3 and a light emitting module 4 which are respectively and electrically connected with the energy distribution module 2, and the light emitting module 4 is electrically connected with the RFID communication and logic control module 3. In this embodiment, the light emitting module 4 is an LED module.
The antenna 1 is used for receiving electromagnetic wave signals sent by a reader-writer, the energy distribution module 2 is used for reasonably distributing energy received by the antenna 1, on the basis of ensuring that the RFID communication and logic control module 3 obtains the required minimum energy, the remaining energy is distributed to the light-emitting module 4, the light-emitting distance of the label is longer, the RFID communication and logic control module 3 is used for receiving instruction signals sent by the reader-writer, after instruction analysis is carried out, the on-off of the current of the light-emitting module 4 and the magnitude of the current flowing in the light-emitting module 4 are controlled, and the light-emitting module 4 is used for giving visual instructions.
As shown in fig. 2, the energy distribution module 2 includes: the first energy distribution module 201 is electrically connected with the antenna 1 and the RFID communication and logic control module 3 to realize energy distribution to the RFID communication and logic control module 3, and the second energy distribution module 202 is electrically connected with the antenna 1 and the light emitting module 4 to realize energy distribution to the light emitting module 4.
As shown in fig. 3, in another embodiment of the present invention, in order to enable the antenna 1 to receive energy better, an impedance matching module 5 may be further added, wherein an input end of the impedance matching module 5 is electrically connected to the antenna 1, and an output end of the impedance matching module 5 is electrically connected to the energy distribution module 2. As shown in fig. 4 to 6, the first energy distribution module 201 and the second energy distribution module 202 may each include: the voltage-dividing module 20, the clamping module 21, the rectifying module 22 and the voltage-stabilizing module 23.
The voltage dividing module 20 distributes energy, in this embodiment, the voltage dividing module 20 employs a coupling capacitor or a voltage dividing resistor, the clamping module 21 discharges excess energy at a short distance, the voltage is clamped within an acceptable range, the rectifying module 22 converts an ac signal into a dc signal, and the voltage stabilizing module 23 stabilizes a signal obtained by rectification within a certain voltage range. By adjusting the voltage dividing module 20, it is ensured that no current flows through the clamping module 21 at the farthest operating distance, and it is ensured that all the received energy is used for the operation of the RFID communication and logic control module 3 and the light emitting module 4.
As shown in fig. 4, in an embodiment of the invention, the voltage dividing module 20 is electrically connected to the antenna 1, the clamping module 21 and the rectifying module 22 are respectively electrically connected to the voltage dividing module 20, and the voltage stabilizing module 23 is electrically connected to the rectifying module 22.
As shown in fig. 5, in another embodiment of the present invention, the voltage dividing module 20 is electrically connected to the antenna 1, the rectifying module 22 is electrically connected to the voltage dividing module 20, and the clamping module 21 and the voltage stabilizing module 23 are respectively electrically connected to the rectifying module 22.
As shown in fig. 6, in another embodiment of the present invention, the voltage dividing module 20 is electrically connected to the antenna 1, the rectifying module 22 is electrically connected to the voltage dividing module 20, the voltage stabilizing module 23 is electrically connected to the rectifying module 22, and the clamping module 21 is electrically connected to the voltage stabilizing module 23.
In an embodiment of the present invention, the first energy distribution module 201 at least includes a voltage dividing module 20, and the remaining modules (the clamping module 21, or the rectifying module 22, or the voltage stabilizing module 23) may be implemented by using the RFID communication and logic control module 3; in another embodiment of the present invention, the second energy distribution module 202 at least includes a rectification module 22, and the clamping module 21, the rectification module 22 and the voltage regulation module 23 may be omitted.
In another embodiment of the present invention, the first energy distribution module 201 and the second energy distribution module 202 respectively include a voltage dividing module, and the first energy distribution module 201 and the second energy distribution module 202 share the same clamping module, the same rectifying module, and the same voltage stabilizing module.
As shown in fig. 7, the RFID communication and logic control module 3 includes: the power distribution module comprises an RF analog module 30 electrically connected with the power distribution module 2, a digital logic module 34 electrically connected with the RF analog module 30 and the light emitting module 4, and a memory 36 electrically connected with the digital logic module 34. The rf analog module 30 includes: the demodulation module 31 and the modulation module 32 of the energy distribution module 2, and the clock generation module 33 are electrically connected.
The demodulation module 31 is used for demodulating signals sent by a reader-writer from an ultrahigh frequency carrier, the modulation module 32 is used for modulating data to be transmitted onto the ultrahigh frequency carrier, the clock generation module 33 generates clock signals required by the work of the tag chip, the digital logic module 34 realizes the logic function of the tag chip, completes the coding and decoding of instructions, controls the on-off of the current of the light-emitting module 4 and the magnitude of the current flowing in the light-emitting module 4, and the memory 36 is used for storing necessary information after power failure.
The digital logic module 34 includes a switch module for controlling the on/off of the current of the light emitting module 4.
As shown in fig. 8, in another embodiment of the present invention, the switch module 301 is configured as a separate module, which is electrically connected to the digital logic module 34 and the light emitting module 4, and the switch module 301 is controlled by the digital logic module 34 to switch the current of the light emitting module 4.
The invention adopts a coupling mode to distribute the energy entering the RFID communication and logic control module and the light-emitting module, the energy distribution module does not consume extra energy, and ensures that the RFID communication and logic control module completes the communication and logic control functions under the condition of obtaining the minimum energy, and distributes the residual energy to the light-emitting module, thereby realizing the coexistence of the energy collection required by lighting the light-emitting module under the condition of a single antenna and the communication function of the label chip, and simultaneously ensuring the longer communication distance and the lighting distance.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.

Claims (8)

1. An RFID tag, comprising: the antenna (1), the energy distribution module (2) electrically connected with the antenna (1), the RFID communication and logic control module (3) and the light-emitting module (4) electrically connected with the energy distribution module (2) respectively, and the light-emitting module (4) electrically connected with the RFID communication and logic control module (3);
the RFID communication and logic control module (3) is used for receiving an instruction signal sent by the reader-writer, and controlling the on-off of the current of the light-emitting module (4) and the magnitude of the current flowing in the light-emitting module (4) after analyzing the instruction, wherein the light-emitting module (4) is used for giving a visual indication;
the energy distribution module (2) comprises: the RFID communication and logic control system comprises a first energy distribution module (201) and a second energy distribution module (202), wherein the first energy distribution module (201) is electrically connected with an antenna (1) and an RFID communication and logic control module (3) to realize energy distribution to the RFID communication and logic control module (3), and the second energy distribution module (202) is electrically connected with the antenna (1) and a light-emitting module (4) to realize energy distribution to the light-emitting module (4);
the first energy distribution module (201) and the second energy distribution module (202) both comprise: the voltage-stabilizing circuit comprises a voltage-dividing module (20), a clamping module (21), a rectifying module (22) and a voltage-stabilizing module (23);
the voltage dividing module (20) is electrically connected with the antenna (1), the rectifying module (22) is electrically connected with the voltage dividing module (20), the voltage stabilizing module (23) is electrically connected with the rectifying module (22), and the clamping module (21) is electrically connected with the voltage dividing module (20), the rectifying module (22) or the voltage stabilizing module (23);
the voltage dividing module (20) distributes energy, current does not flow through the clamping module (21) at the farthest operation distance, the clamping module (21) discharges redundant energy at a short distance, voltage is clamped in an acceptable range, the rectifying module (22) converts alternating current signals into direct current signals, and the voltage stabilizing module (23) stabilizes rectified signals in a certain voltage range.
2. The RFID tag of claim 1, wherein the first energy distribution module (201) comprises at least a voltage divider module (20), and the second energy distribution module (202) comprises at least a rectifier module (22).
3. The RFID tag of claim 2, wherein the voltage divider module (20) employs a coupling capacitor or a voltage divider resistor.
4. An RFID tag as claimed in claim 3, characterized in that the RFID communication and logic control module (3) comprises: the radio frequency analog module (30) is electrically connected with the energy distribution module (2), the digital logic module (34) is electrically connected with the radio frequency analog module (30) and the light-emitting module (4), and the memory (36) is electrically connected with the digital logic module (34);
the radio frequency analog module (30) comprises: a demodulation module (31) and a modulation module (32) which are electrically connected with the energy distribution module (2), and a clock generation module (33);
the demodulation module (31) is used for demodulating signals sent by a reader-writer from an ultrahigh frequency carrier, the modulation module (32) is used for modulating data to be transmitted onto the ultrahigh frequency carrier, the clock generation module (33) generates clock signals required by the work of the tag chip, the digital logic module (34) realizes the logic function of the tag chip, completes the coding and decoding of instructions, controls the on-off of the current of the light-emitting module (4) and the magnitude of the current flowing in the light-emitting module (4), and the memory (36) is used for storing necessary information after power failure.
5. The RFID tag according to claim 4, wherein the RFID communication and logic control module (3) further comprises any one or more of a clamping module (21), a rectifying module (22) and a voltage stabilizing module (23); the clamping module (21) is electrically connected with the voltage division module (20), the rectification module (22) is electrically connected with the clamping module (21), and the voltage stabilization module (23) is electrically connected with the rectification module (22).
6. The RFID tag according to claim 5, wherein the digital logic module (34) comprises a switch module for controlling the current on/off of the light emitting module (4).
7. The RFID tag as claimed in claim 5, wherein the switch module (301) is provided as a separate module, which is electrically connected to the digital logic module (34) and the light emitting module (4), and the switch module (301) is controlled by the digital logic module (34) to switch the current of the light emitting module (4).
8. The RFID tag of claim 6 or 7, further comprising: and the impedance matching module (5) is electrically connected with the antenna (1) and the energy distribution module (2), and the impedance matching module (5) enables the antenna (1) to better receive energy.
CN201610357280.0A 2016-05-26 2016-05-26 RFID label Active CN107437107B (en)

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Publication number Priority date Publication date Assignee Title
CN111685378B (en) * 2020-06-15 2023-07-28 上海复旦微电子集团股份有限公司 Electronic cigarette cartridge and electronic cigarette

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102456151A (en) * 2010-11-01 2012-05-16 上海华虹Nec电子有限公司 Clamping circuit for electronic tag of RFID (radio frequency identification) system
CN203118021U (en) * 2012-06-14 2013-08-07 深圳市方卡科技股份有限公司 Self-luminous RFID intelligent card
CN103714378A (en) * 2014-01-08 2014-04-09 卓捷创芯科技（深圳）有限公司 System and method for intelligent energy management of passive radio frequency tag
CN104617795A (en) * 2015-03-04 2015-05-13 山东华翼微电子技术股份有限公司 Rectifier circuit for automatically adjusting power conversion efficiency for passive tag

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102456151A (en) * 2010-11-01 2012-05-16 上海华虹Nec电子有限公司 Clamping circuit for electronic tag of RFID (radio frequency identification) system
CN203118021U (en) * 2012-06-14 2013-08-07 深圳市方卡科技股份有限公司 Self-luminous RFID intelligent card
CN103714378A (en) * 2014-01-08 2014-04-09 卓捷创芯科技（深圳）有限公司 System and method for intelligent energy management of passive radio frequency tag
CN104617795A (en) * 2015-03-04 2015-05-13 山东华翼微电子技术股份有限公司 Rectifier circuit for automatically adjusting power conversion efficiency for passive tag

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