CN115329914A - Remote identification method based on nfc tag - Google Patents

Remote identification method based on nfc tag Download PDF

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Publication number
CN115329914A
CN115329914A CN202211000599.XA CN202211000599A CN115329914A CN 115329914 A CN115329914 A CN 115329914A CN 202211000599 A CN202211000599 A CN 202211000599A CN 115329914 A CN115329914 A CN 115329914A
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module
strength
receiving
nfc
transmitting
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韦挺
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Shenzhen Derk Iot Technology Co ltd
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Shenzhen Derk Iot Technology 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
    • G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
    • G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
    • 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
    • G06K19/0723—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 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10297—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • Computer Security & Cryptography (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Selective Calling Equipment (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

The invention discloses a remote identification method based on an NFC tag, and belongs to the technical field of NFC detection. The method specifically comprises the steps of controlling the read-write end to periodically and circularly transmit high-strength test signals with different strengths, receiving and processing the high-strength test signals by the electronic tag end to obtain the lowest signal strength in the complete test signals, controlling the electronic tag end to transmit NFC radio-frequency signals which are stronger than the received lowest signal strength by about 5% -10%, controlling the read-write end to receive the signals and identify the signals, and timely adjusting the signals according to specific transmission conditions, so that the electric quantity loss and the service life damage of components caused by long-time high-strength transmission of the NFC signals are avoided, and the use is more flexible.

Description

Remote identification method based on nfc tag
Technical Field
The invention belongs to the technical field of NFC detection, and particularly relates to a NFC tag-based remote identification method.
Background
NFC, near field communication (near field communication), is a short-range, high-frequency wireless communication technology, and devices (e.g., mobile phones) using the NFC technology can exchange data while being close to each other.
NFC has evolved from the integration of contactless Radio Frequency Identification (RFID) and interworking technologies. The functions of an induction type card reader, an induction type card and point-to-point communication are integrated on a single chip, and the mobile terminal is used for realizing applications such as mobile payment and electronic ticketing.
The work flow of the RFID system is to sequentially connect the RFID electronic tag, the reader-writer and the upper computer/background in the system to complete the acquisition, transmission, processing and management of information. Firstly, an RFID reader-writer sends out a radio signal through an antenna of the RFID reader-writer to form an effective identification range of the reader-writer, when an RFID electronic tag enters the identification range, the RFID electronic tag receives an electromagnetic wave signal from the reader-writer, is activated and carries out command analysis, and data information stored in the electronic tag is sent out through the antenna of the RFID electronic tag according to command instructions; then an antenna of the reader-writer receives a radio frequency signal from the RFID electronic tag, the reader-writer demodulates and decodes the signal, and after the validity of the received information is judged by the upper computer/the background or the reader-writer, different instructions are sent according to different settings, such as reading or rewriting information of a memory in the electronic tag; and finally, the reader-writer transmits the processed data information to an upper computer/background system, and the upper computer/background system updates the information in real time and shares the information to the user.
Many years of research and practice have led to various implementations of RFID systems. RFID systems can be classified into Low Frequency (LF), high Frequency (HF), ultra-high frequency (UHF), and Microwave (MW) types according to their operating frequencies. The low-frequency RFID system works in a frequency band of 30KHz to 300KHz, and typical working frequencies are 125KHz, 133KHz and 134.2KHz. The low-frequency electronic tag is generally a passive electronic tag and can have multiple shapes, the working energy of the low-frequency electronic tag is obtained in an inductive coupling (transformer coupling) mode between an antenna (coil) of the electronic tag and an antenna (coil) of a reader-writer, and when the electronic tag and the reader-writer perform data exchange, the electronic tag must be located in a near field region radiated by the antenna of the reader-writer, namely, the antenna of the reader-writer and the antenna of the RFID electronic tag both have strong directivity. Due to the high penetration of the low frequency magnetic field, the identification distance is not affected by the characteristics of the surrounding accessory materials (except for metals). Compared with passive electronic tags in other frequency bands, the antenna of the passive electronic tag is high in cost, short in reading and writing distance, low in speed and weak in anti-collision capacity of multiple electronic tags.
The existing long-distance communication in NFC is realized by enhancing the radiation range of an antenna of a reader-writer and the data transmission distance of a label, but the enhancement is realized based on continuous or normal work, the output power cannot be adjusted in real time according to the communication distance, and the overall loss is larger.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to solve the problem that the output power cannot be adjusted in real time according to the communication distance in the existing NFC long-distance communication.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention discloses a remote identification method based on an NFC tag, which controls a read-write terminal to periodically and circularly emit high-strength test signals with different strengths, and an electronic tag terminal to receive and process the high-strength test signals to obtain the lowest signal strength in the complete test signals, controls the electronic tag terminal to emit an NFC radio frequency signal which is 5-10% stronger than the received lowest signal strength, and controls the read-write terminal to receive and identify the signals.
Preferably, the method comprises the steps of:
s100, periodically and circularly transmitting high-strength test signals with different strengths by the read-write end 100;
s200, the electronic tag end 200 acquires the transmission intensity of the real-time test signal;
s300, the electronic tag end 200 obtains the stable transmission strength with the lowest strength;
s400, amplifying the stable transmission strength with the lowest strength according to a proportion at the electronic tag end 200 and sending an NFC radio frequency signal;
s500, the read-write terminal 100 receives and identifies NFC radio frequency signal information for processing;
s600, the reading and writing end 100 receives and identifies the strength of the NFC radio frequency signal and adjusts the power and the distance of a receiving field.
Preferably, the read-write end comprises a read-write transmitting module and a read-write receiving module, the read-write transmitting module is used for transmitting a high-strength test signal, the read-write receiving module comprises a low-strength receiving unit and a high-strength receiving unit, and the low-strength receiving unit and the high-strength receiving unit are respectively used for receiving radio frequency NFC radio-frequency signals with different strengths and different ranges;
the electronic tag end comprises an emission control module, a common emission module, an enhanced emission module and a tag receiving module, wherein the enhanced emission module is a radio frequency emission unit with adjustable emission power, the tag receiving module is matched with the read-write emission module and used for receiving high-intensity test signals emitted by the read-write emission module, the common emission module and the enhanced emission module are used for emitting NFC radio frequency signals with different intensities, and the emission control module controls the common emission module and the enhanced emission module to cooperatively emit the NFC radio frequency signals to be received by the read-write receiving module according to the signal intensity of the read-write emission module received by the tag receiving module.
Preferably, the read-write transmitting module periodically and cyclically transmits high-strength test signals with different strengths, the high-strength test signals with different strengths have a certain difference and are recorded with strength information by the tag receiving module, the tag receiving module sequentially receives the high-strength test signals with different strengths and sends corresponding information of the high-strength test signals with complete information and lowest strength to the transmitting control module, the read-write transmitting module periodically and cyclically transmits the high-strength test signals with different strengths specifically at an interval of 30s to 60s for one period, and the total time for cyclically transmitting the high-strength test signals with different strengths in one period is 3s to 5s.
Preferably, a plurality of emission strategies are stored in the emission control module, the emission strategies correspond to the intensity information recorded by the tag receiving module one by one, and the emission strategies specifically control the common emission module and the enhanced emission module to cooperate with the NFC radio-frequency signal which is synchronous with the intensity frequency of the high-intensity test signal received by the receiving module according to the high-intensity test signals with different intensities received by the tag receiving module.
Preferably, when the strength of the high-strength test signal received by the receiving module is within the signal strength transmitting range of the common transmitting module, the transmitting control module controls the common transmitting module to transmit the NFC radio-frequency signal, and the strength of the NFC radio-frequency signal transmitted by the common transmitting module is greater than the strength of the high-strength test signal received by the receiving module by 10% to 15%.
Preferably, when the strength of the high-strength test signal received by the receiving module is within the signal strength transmitting range of the enhanced transmitting module, the transmission control module controls the enhanced transmitting module to transmit the NFC radio-frequency signal, and the strength of the NFC radio-frequency signal transmitted by the enhanced transmitting module is 5% to 10% greater than the strength of the high-strength test signal received by the receiving module.
Preferably, the read-write receiving module is provided with an adjusting unit for adjusting the diameter D of the receiving field, the read-write receiving module is further provided with a data processing unit for processing and identifying the closest distance L between the NFC radio-frequency signal sent by the electronic tag end and the receiving end of the receiving field, the L is the closest distance between the edge of the NFC radio-frequency signal area received by the receiving field and the receiving end of the receiving field, and when the L is less than or equal to 0.5D, the adjusting unit adjusts the diameter D of the receiving field to be reduced by 25%; when the L is more than 0.5D and less than 0.7D, the adjusting unit adjusts the diameter D of the receiving field to increase by 15 percent; when the L is more than or equal to 0.7D and less than 0.9D, the adjusting unit adjusts the diameter D of the receiving field to increase by 25 percent, and when the L is more than or equal to 0.9D and less than 1D, the adjusting unit adjusts the diameter D of the receiving field to increase by 30 percent.
Preferably, the electronic tag end still includes power module and light module, power module is used for supplying power for whole electronic tag end, power module still includes wireless charging unit, light module is equipped with the pilot lamp of the different colours of a plurality of, the pilot lamp of different colours corresponds the high strength test signal of the different intensity that label receiving module received.
Preferably, the read-write terminal is further provided with a processing module, a storage module and a display module, the processing module is configured to analyze the NFC radio-frequency signal information received by the read-write receiving module and send the information to the storage module and the display module, the display module is configured to display the processed information, and the storage module is configured to store the processed information.
Preferably, the mobile terminal further comprises a database in communication connection with the read-write terminal and the electronic tag terminal, and the database is used for storing the operating data of the read-write terminal and the electronic tag terminal and updating the stored information corresponding to the released NFC radio-frequency signal.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
according to the NFC tag-based remote identification method, the read-write end is controlled to periodically and circularly transmit high-strength test signals with different strengths, the electronic tag end receives and processes the high-strength test signals to obtain the lowest signal strength in the complete test signals, the electronic tag end is controlled to transmit NFC radio-frequency signals with the strength about 5% -10% stronger than the received lowest signal strength, the read-write end is controlled to receive and identify the signals, and the NFC radio-frequency signals can be timely adjusted according to specific transmission conditions, so that electric quantity loss and service life damage of components caused by long-time high-strength transmission of the NFC signals are avoided, and the NFC tag-based remote identification method is more flexible to use.
Drawings
FIG. 1 is a schematic view of the overall structure of the apparatus of this embodiment 1;
FIG. 2 is a flowchart of the method of this embodiment 1.
The reference numbers in the schematic drawings illustrate:
100. a read-write end; 110. a storage module; 120. a processing module; 130. a read-write receiving module; 140. a display module;
200. an electronic tag end; 210. a power supply module; 220. a transmission control module; 230. a common transmitting module; 240. an enhanced transmit module; 250. a tag receiving module; 260. a light module;
300. a database.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
Referring to fig. 1, in the NFC tag-based remote identification method of this embodiment, the read-write end 100 is controlled to periodically and cyclically transmit high-strength test signals with different strengths, the electronic tag end 200 receives and processes the high-strength test signals to obtain the lowest signal strength in the complete test signals and control the electronic tag end 200 to transmit an NFC radio-frequency signal that is stronger than the received lowest signal strength by about 5% to 10%, and the read-write end 100 is controlled to receive and identify the signals and can be adjusted in time according to specific transmission conditions, so that power loss and component life damage caused by long-time high-strength transmission of the NFC signals are avoided, and the NFC tag-based remote identification method is more flexible to use.
The method of the embodiment comprises the following specific steps:
s100, periodically and circularly transmitting high-strength test signals with different strengths by the read-write end 100;
s200, the electronic tag end 200 acquires the transmission intensity of the real-time test signal;
s300, the electronic tag end 200 acquires the stable transmission intensity with the lowest intensity;
s400, amplifying the stable transmission strength with the lowest strength according to a proportion at the electronic tag end 200 and sending an NFC radio frequency signal;
s500, the read-write terminal 100 receives and identifies NFC radio frequency signal information for processing;
s600, the reading and writing end 100 receives and identifies the strength of the NFC radio frequency signal and adjusts the power and the distance of a receiving field.
The read-write terminal 100 comprises a read-write transmitting module 150 and a read-write receiving module 130, wherein the read-write transmitting module 150 is used for transmitting a high-strength test signal, the read-write receiving module 130 comprises a low-strength receiving unit and a high-strength receiving unit, and the low-strength receiving unit and the high-strength receiving unit are respectively used for receiving radio frequency NFC radio frequency signals with different strengths and different ranges;
the electronic tag end 200 includes a transmission control module 220, a common transmission module 230, an enhanced transmission module 240 and a tag receiving module 250, the enhanced transmission module 240 is a radio frequency transmission unit capable of adjusting transmission power, the tag receiving module 250 is matched with the read-write transmission module 150 for receiving a high-strength test signal transmitted by the read-write transmission module 150, the common transmission module 230 and the enhanced transmission module 240 are used for transmitting NFC radio frequency signals with different strengths, and the transmission control module 220 controls the common transmission module 230 and the enhanced transmission module 240 to cooperatively transmit the NFC radio frequency signal according to the signal strength of the read-write transmission module 150 received by the tag receiving module 250 so as to be received by the read-write receiving module 130. This application is used for sending high strength test signal and is received by and label receiving module 250 through reading and writing emission module 150, label receiving module 250 sends received signal transmission for emission control module 220, emission control module 220 judges received signal strength and controls electronic tags end 200 according to the minimum signal strength among the complete test signal received and sends the NFC radio frequency signal that is stronger than received minimum signal strength about 5% ~ 10%, thereby can guarantee that the NFC signal that electronic tags end 200 sent can be received the discernment by reading and writing end 100, and can adjust in good time according to concrete transmission condition, thereby avoid the electric quantity loss and the life-span damage of components and parts that long-time high strength emission NFC signal caused, it is more nimble to use.
The read-write transmitting module 150 periodically and cyclically transmits the high-strength test signals with different strengths, the high-strength test signals with different strengths have a certain difference, and the tag receiving module 250 records strength information, and the tag receiving module 250 sequentially receives the high-strength test signals with different strengths and sends corresponding information of the high-strength test signals with complete information and lowest strength to the transmitting control module 220. The strength of the signal transmitted by the read-write transmitting module 150 each time is sequentially increased by 5%, the specific time for periodically and cyclically transmitting the high-strength test signals with different strengths by the read-write transmitting module 150 is 30 s-40 s one period, and the total time for cyclically transmitting the high-strength test signals with different strengths in one period is 3 s-5 s.
A plurality of transmission strategies are stored in the transmission control module 220, the plurality of transmission strategies correspond to the plurality of intensity information recorded by the tag receiving module 250 one by one, and the plurality of transmission strategies specifically include that the common transmission module 230 and the enhanced transmission module 240 are controlled to cooperate with the NFC radio-frequency signal having the same frequency as the intensity of the high-intensity test signal received by the receiving module 250 or are enhanced by 5% to 10% according to the high-intensity test signals with different intensities received by the tag receiving module 250.
When the strength of the high-strength test signal received by the receiving module 250 is within the signal strength transmitting range of the ordinary transmitting module 230, the transmitting control module 220 controls the ordinary transmitting module 230 to transmit the NFC radio frequency signal, and the strength of the NFC radio frequency signal transmitted by the ordinary transmitting module 230 is 10% to 15% greater than the strength of the high-strength test signal received by the receiving module 250.
When the strength of the high-strength test signal received by the receiving module 250 is within the signal strength transmitting range of the enhanced transmitting module 240, the transmission control module 220 controls the enhanced transmitting module 240 to transmit the NFC radio frequency signal, where the strength of the NFC radio frequency signal transmitted by the enhanced transmitting module 240 is 5% to 10% greater than the strength of the high-strength test signal received by the receiving module 250.
The read-write receiving module 130 is provided with an adjusting unit for adjusting the diameter D of the receiving field, the read-write receiving module 130 is further provided with a data processing unit for processing and identifying the closest distance L between the NFC radio-frequency signal sent by the electronic tag end 200 and the receiving end of the receiving field, where L is the closest distance between the edge of the NFC radio-frequency signal area received by the receiving field and the receiving end of the receiving field, and when L is less than or equal to 0.5D, the adjusting unit adjusts the diameter D of the receiving field to be reduced by 25%; when the L is more than 0.5D and less than 0.7D, the adjusting unit adjusts the diameter D of the receiving field to increase by 15%; when the L is more than or equal to 0.7D and less than 0.9D, the adjusting unit adjusts the diameter D of the receiving field to increase by 25 percent, and when the L is more than or equal to 0.9D and less than 1D, the adjusting unit adjusts the diameter D of the receiving field to increase by 30 percent. The receiving area and the receiving power of the receiving field can be controlled so that the receiving field can exactly and clearly receive the NFC radio-frequency signal sent by the electronic tag end 200.
Electronic tags end 200 still includes power module 210 and light module 260, power module 210 is used for supplying power for whole electronic tags end 200, power module 210 still includes the wireless unit of charging, light module 260 is equipped with the pilot lamp of the different colours of a plurality of, the pilot lamp of different colours corresponds the high strength test signal of the different intensity that label receiving module 250 received.
The read-write terminal 100 is further provided with a processing module 120, a storage module 130, and a display module 140, where the processing module 120 is configured to analyze the NFC radio frequency signal information received by the read-write receiving module 130 and send the information to the storage module 130 and the display module 140, the display module 140 is configured to display the processed information, and the storage module 130 is configured to store the processed information.
The NFC reader-writer further comprises a database 300 in communication connection with the reader-writer end 100 and the electronic tag end 200, wherein the database 300 is used for storing the operation data of the reader-writer end 100 and the electronic tag end 200 and updating the storage information corresponding to the released NFC radio frequency signal.
The above embodiments only express a certain implementation manner of the present invention, and the description is specific and detailed, but not to be understood as limiting the scope of the present invention; it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the protection scope of the present invention; therefore, the protection scope of the present patent should be subject to the appended claims.

Claims (10)

1. A remote identification method based on nfc labels is characterized in that: the read-write end (100) is controlled to periodically and circularly transmit high-strength test signals with different strengths, the electronic tag end (200) receives and processes the high-strength test signals to obtain the lowest signal strength in the complete test signals, the electronic tag end (200) is controlled to transmit NFC radio-frequency signals which are 5% -10% stronger than the received lowest signal strength, and the read-write end (100) is controlled to receive and identify the signals.
2. A nfc tag based remote identification method according to claim 1, wherein said method comprises the following steps:
s100, periodically and circularly transmitting high-strength test signals with different strengths by the read-write end (100);
s200, the electronic tag end (200) acquires the transmission intensity of the real-time test signal;
s300, the electronic tag end (200) obtains the stable transmission intensity with the lowest intensity;
s400, amplifying the stable transmission strength with the lowest strength according to a proportion at the electronic tag end (200) and sending an NFC radio frequency signal;
s500, the read-write terminal (100) receives and identifies NFC radio frequency signal information for processing;
s600, the reading and writing end (100) receives and identifies the strength of the NFC radio frequency signal and adjusts the power and distance of a receiving field.
3. A nfc tag-based remote identification method according to claim 2, wherein: the reading and writing terminal (100) comprises a reading and writing transmitting module (150) and a reading and writing receiving module (130), wherein the reading and writing transmitting module (150) is used for transmitting a high-strength test signal, the reading and writing receiving module (130) comprises a low-strength receiving unit and a high-strength receiving unit, and the low-strength receiving unit and the high-strength receiving unit are respectively used for receiving radio frequency NFC radio frequency signals with different strengths and different ranges;
the electronic tag end (200) comprises a transmitting control module (220), a common transmitting module (230), an enhanced transmitting module (240) and a tag receiving module (250), wherein the enhanced transmitting module (240) is a radio frequency transmitting unit with adjustable transmitting power, the tag receiving module (250) is matched with the read-write transmitting module (150) and used for receiving high-strength test signals transmitted by the read-write transmitting module (150), the common transmitting module (230) and the enhanced transmitting module (240) are used for transmitting NFC radio frequency signals with different strengths, and the transmitting control module (220) controls the common transmitting module (230) and the enhanced transmitting module (240) to be matched with each other to transmit the NFC radio frequency signals to be received by the read-write receiving module (130) according to the signal strength of the read-write transmitting module (150) received by the tag receiving module (250).
4. A method for nfc-tag based distance identification according to claim 3, characterized in that: the reading and writing emission module (150) periodically and circularly emits high-intensity test signals with different intensities, the high-intensity test signals with different intensities have a certain difference and are recorded with intensity information by the label receiving module (250), the label receiving module (250) sequentially receives the high-intensity test signals with different intensities and sends the corresponding information of the high-intensity test signal with complete information and lowest intensity to the emission control module (220), the reading and writing emission module (150) periodically and circularly emits the high-intensity test signals with different intensities, specifically, the interval is 30 s-60 s, the total time for circularly emitting the high-intensity test signals with different intensities in one period is 3 s-5 s.
5. A nfc tag-based remote identification method according to claim 4, wherein: the transmission control module (220) is internally provided with a plurality of transmission strategies, the plurality of transmission strategies correspond to the plurality of intensity information recorded by the tag receiving module (250) one by one, and the plurality of transmission strategies specifically comprise that the common transmission module (230) and the enhanced transmission module (240) are controlled to cooperate with the NFC radio frequency signal which is synchronous with the intensity frequency of the high-intensity test signal received by the receiving module (250) according to the high-intensity test signals with different intensities received by the tag receiving module (250).
6. A nfc tag-based remote identification method according to claim 5, wherein: when the strength of the high-strength test signal received by the receiving module (250) is within the signal strength transmitting range of the ordinary transmitting module (230), the transmitting control module (220) controls the ordinary transmitting module (230) to transmit the NFC radio-frequency signal, and the strength of the NFC radio-frequency signal transmitted by the ordinary transmitting module (230) is 10% -15% greater than the strength of the high-strength test signal received by the receiving module (250).
7. Method for nfc-tag based distance identification according to claim 5, characterized in that: when the strength of the high-strength test signal received by the receiving module (250) is within the signal strength transmitting range of the enhanced transmitting module (240), the transmitting control module (220) controls the enhanced transmitting module (240) to transmit the NFC radio-frequency signal, and the strength of the NFC radio-frequency signal transmitted by the enhanced transmitting module (240) is 5% -10% greater than the strength of the high-strength test signal received by the receiving module (250).
8. Method for nfc-tag based distance identification according to claim 5, characterized in that: the read-write receiving module (130) is provided with an adjusting unit for adjusting the diameter D of the receiving field, the read-write receiving module (130) is further provided with a data processing unit for processing and identifying the closest distance L of the NFC radio-frequency signal sent by the electronic tag end (200) received by the receiving field, the L is the closest distance between the edge of the NFC radio-frequency signal area received by the receiving field and the receiving end of the receiving field, and when the L is less than or equal to 0.5D, the adjusting unit adjusts the diameter D of the receiving field to be reduced by 25%; when the L is more than 0.5D and less than 0.7D, the adjusting unit adjusts the diameter D of the receiving field to increase by 15 percent; when the L is more than or equal to 0.7D and less than 0.9D, the adjusting unit adjusts the diameter D of the receiving field to increase by 25 percent, and when the L is more than or equal to 0.9D and less than 1D, the adjusting unit adjusts the diameter D of the receiving field to increase by 30 percent.
9. A nfc tag-based remote identification method according to claim 5, wherein: electronic tags end (200) still include power module (210) and light module (260), power module (210) are used for supplying power for whole electronic tags end (200), power module (210) still include wireless charging unit, light module (260) are equipped with the pilot lamp of a plurality of different colours, the pilot lamp of different colours corresponds the high strength test signal of the different intensity that label receiving module (250) received.
10. Method for nfc-tag based distance identification according to claim 5, characterized in that: the read-write terminal (100) is further provided with a processing module (120), a storage module (130) and a display module (140), the processing module (120) is used for analyzing the NFC radio frequency signal information received by the read-write receiving module (130) and sending the information to the storage module (130) and the display module (140), the display module (140) is used for displaying the processed information, and the storage module (130) is used for storing the processed information.
CN202211000599.XA 2022-08-19 2022-08-19 Remote identification method based on nfc tag Pending CN115329914A (en)

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