WO2023155801A1 - Anti-channeling reading method and system for radio-frequency signals, and application of system - Google Patents

Anti-channeling reading method and system for radio-frequency signals, and application of system Download PDF

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Publication number
WO2023155801A1
WO2023155801A1 PCT/CN2023/076156 CN2023076156W WO2023155801A1 WO 2023155801 A1 WO2023155801 A1 WO 2023155801A1 CN 2023076156 W CN2023076156 W CN 2023076156W WO 2023155801 A1 WO2023155801 A1 WO 2023155801A1
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WO
WIPO (PCT)
Prior art keywords
radio frequency
read
antenna
main
write antenna
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PCT/CN2023/076156
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French (fr)
Chinese (zh)
Inventor
张庆信
傅博
李仲卿
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上海英内物联网科技股份有限公司
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Publication of WO2023155801A1 publication Critical patent/WO2023155801A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10019—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers.
    • G06K7/10079—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions
    • G06K7/10089—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions the interrogation device using at least one directional antenna or directional interrogation field to resolve the collision
    • G06K7/10099—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions the interrogation device using at least one directional antenna or directional interrogation field to resolve the collision the directional field being used for pinpointing the location of the record carrier, e.g. for finding or locating an RFID tag amongst a plurality of RFID tags, each RFID tag being associated with an object, e.g. for physically locating the RFID tagged object in a warehouse
    • 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
    • G06K17/0029—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 the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
    • 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
    • G06K7/10316—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 using at least one antenna particularly designed for interrogating the wireless record carriers
    • G06K7/10356—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 using at least one antenna particularly designed for interrogating the wireless record carriers using a plurality of antennas, e.g. configurations including means to resolve interference between the plurality of antennas
    • 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

Definitions

  • the invention relates to a radio frequency signal anti-falsification reading method, system and application, belonging to the field of radio frequency technology.
  • the technical problem to be solved by the present invention is to provide a radio frequency signal anti-fleeing reading method, which adopts a new radio frequency work design, and is designed to trigger the emission of interference radio frequency signals while detecting the radio frequency signal emitted by the radio frequency reader, so as to ensure the target The accuracy of the signal returned by the radio frequency tag.
  • the present invention designs a radio frequency signal anti-false reading method, aiming at the scene where there are target radio frequency tags and other radio frequency tags in the radio frequency communication range corresponding to the main radio frequency read and write antenna, Combined with the auxiliary RF read-write antenna, and the transmitter of the main RF read-write antenna faces the target RF tag, the transmitter of the auxiliary RF read-write antenna faces other RF tags, and the distance between the target RF tag and the main RF read-write antenna is smaller than that of the auxiliary RF The distance between the read-write antennas, the distance between other RF tags and the auxiliary RF read-write antenna is smaller than the distance between it and the main RF read-write antenna, perform the following steps in real time to realize the communication between the main RF read-write antenna and the target RF tag ;
  • Step A Detect whether the main RF read/write antenna emits RF signals, if yes, enter step B; otherwise, repeat step A;
  • Step B Controlling the auxiliary radio frequency read-write antenna to emit radio frequency signals to form an interference radio frequency signal, and the duration of the interference radio frequency signal is shorter than the duration of the radio frequency signal emitted by the main radio frequency read/write antenna.
  • step AB-1 it also includes step AB-1 to step AB-5 as follows, in said step A, when it is detected that the main radio frequency read-write antenna transmits a radio frequency signal, enter step AB-1;
  • Step AB-1 Determine whether the radio frequency signal transmitted by the main radio frequency read-write antenna needs a return signal from the radio frequency tag, and if so, enter step B; otherwise, enter step AB-2;
  • Step AB-2 Control the auxiliary radio frequency reading and writing antenna to start continuously transmitting radio frequency signals, forming continuous interference radio frequency signals, And go to step AB-3;
  • Step AB-3 Detect whether the main radio frequency read-write antenna emits radio frequency signals, and enter step AB-4; otherwise, repeat step AB-3;
  • Step AB-4 Determine whether the radio frequency signal transmitted by the main radio frequency read-write antenna in step AB-3 needs a radio frequency tag return signal, and if so, enter step AB-5; otherwise return to step AB-3;
  • Step AB-5 Control the auxiliary radio frequency reading and writing antenna to stop continuously transmitting radio frequency signals, and enter step B.
  • the duration of the interfering radio frequency signal transmitted by the auxiliary radio frequency read-write antenna is shorter than the duration of any type of radio frequency signal.
  • the technical problem to be solved in the present invention is to provide a system for realizing the method of anti-slipping reading of radio frequency signals, introduce a coupler, realize the joint application of the main radio frequency read-write antenna and the auxiliary radio frequency read-write antenna, and complete The designed RF signal anti-falsification reading method, while detecting the RF signal emitted by the RF reader, triggers the emission of the interference RF signal to ensure the accuracy of the signal returned by the target RF tag.
  • the present invention designs a system of radio frequency signal anti-alteration reading method, based on the main radio frequency read-write antenna, auxiliary radio frequency read-write antenna, including coupler, radio frequency demodulator circuit;
  • the main radio frequency read-write antenna includes a main radio frequency reader-writer, a coupler, and a main radio-frequency antenna connected in series in sequence, and the auxiliary radio-frequency read-write antenna includes an auxiliary radio-frequency reader-writer and an auxiliary radio-frequency antenna connected to each other;
  • the demodulation circuit is connected, and the radio frequency demodulation circuit is connected with the auxiliary radio frequency reader;
  • the transmitting end of the main RF antenna faces the target RF tag
  • the transmitting end of the auxiliary RF antenna faces other RF tags
  • the distance between the target RF tag and the main RF antenna is smaller than the distance between it and the auxiliary RF antenna, and the distance between other RF tags and the auxiliary RF antenna The distance is less than the distance between it and the main radio frequency antenna;
  • the main RF reader generates RF signals and sends them to the connected coupler.
  • the coupler divides the received RF signals into two channels, one of which continues to be sent to the main RF antenna for outward emission, and the other RF signal Send to the radio frequency demodulation circuit, the radio frequency demodulation circuit detects and analyzes the received radio frequency signal, and the radio frequency demodulation circuit triggers the auxiliary radio frequency reader to generate the radio frequency signal, and realizes the outward emission through the auxiliary radio frequency antenna.
  • the radio frequency demodulation circuit executes the above radio frequency signal tamper-proof reading method to realize the communication between the main radio frequency read-write antenna and the target radio frequency tag.
  • the technical problem to be solved in the present invention is to provide an application of a system for realizing the anti-falsification reading method of radio frequency signals, which is applied to the article conveyor belt system.
  • the radio frequency identification efficiency of items on the Internet is to provide an application of a system for realizing the anti-falsification reading method of radio frequency signals, which is applied to the article conveyor belt system.
  • the present invention designs a radio frequency signal anti-false reading
  • the application of the reading method system is applied to the article conveyor belt system, including at least one main radio frequency read-write antenna and at least one auxiliary radio frequency read-write antenna; radio frequency tags are respectively set on each article conveyed in the article conveyor belt system; each main radio frequency
  • the RF read-write antennas are set on both sides of the conveyor belt corresponding to the preset RF detection position, and the transmitting ends of each main RF read-write antenna point to the conveyor belt at the preset RF detection position; each auxiliary RF read-write antenna is located at the preset RF detection position.
  • each auxiliary radio frequency read-write antenna is located on both sides of the conveyor belt at this position, and the transmitting end of each auxiliary radio frequency read-write antenna is directed to the conveyor belt surface in a direction facing the conveying direction of the conveyor belt;
  • the radio frequency tags on the articles constitute the radio frequency tags;
  • a target radio frequency tag is formed; the radio frequency demodulation circuit executes the above radio frequency signal anti-falsification reading method to realize the communication between the main radio frequency read-write antenna and the target radio frequency tag.
  • a method, system, and application for anti-falsification reading of radio frequency signals have the following technical effects compared with the prior art by adopting the above technical scheme:
  • the radio frequency signal anti-false reading method designed in the present invention adopts a new radio frequency work design, based on the respective detection of each radio frequency signal emitted by the main radio frequency read/write antenna, trigger generation and each radio frequency emitted by the main radio frequency read/write antenna
  • the designed system is applied to the article conveyor belt system. According to the transmission direction of the conveyor belt, distribution settings are made for each module in the design system, and the application implements the RF signal anti-false reading and reading This method can effectively improve the efficiency of radio frequency identification of items on the conveyor belt.
  • Fig. 1 is the working schematic diagram of the radio frequency signal in the prior art
  • Fig. 2 is the working schematic diagram of the radio frequency signal anti-falsification reading method designed by the present invention
  • Fig. 3 is a schematic diagram of signal sending and receiving of the radio frequency signal anti-falsification reading method designed by the present invention
  • Fig. 4 is the structural representation of the system of the radio frequency signal anti-falsification reading method designed by the present invention.
  • Fig. 5 is a schematic diagram of the application structure of the system of the radio frequency signal anti-falsification reading method designed in the present invention.
  • the present invention designs a radio frequency signal anti-false reading method, aiming at the radio frequency communication range corresponding to the main radio frequency read and write antenna.
  • the transmitter faces other RF tag Tag B, and the distance between the target RF tag Tag A and the main RF read-write antenna is smaller than the distance between it and the auxiliary RF read-write antenna, and the distance between other RF tag Tag B and the auxiliary RF read-write antenna Less than the distance between it and the main radio frequency read-write antenna, as shown in Figure 3, perform the following steps A to B in real time to realize the communication between the main radio frequency read-write antenna and the target radio frequency tag Tag A.
  • Step A Detect whether the main RF read/write antenna emits RF signals, if yes, enter step B; otherwise, repeat step A.
  • Step B Controlling the auxiliary radio frequency read-write antenna to emit radio frequency signals to form an interference radio frequency signal, and the duration of the interference radio frequency signal is shorter than the duration of the radio frequency signal emitted by the main radio frequency read/write antenna.
  • step AB-1 to step AB-5 are further added as follows, as shown in Figure 3, the following steps A to step B are executed in real time to realize the communication between the main radio frequency read-write antenna and the target radio frequency tag Tag A communication between.
  • Step A Detect whether the main RF read-write antenna emits RF signals, if yes, enter step AB-1; otherwise, repeat step A.
  • Step AB-1 Determine whether the radio frequency signal transmitted by the main radio frequency read-write antenna needs a return signal from the radio frequency tag, and if yes, proceed to step B; otherwise, proceed to step AB-2.
  • Step AB-2 Control the auxiliary radio frequency reading and writing antenna to start continuously transmitting radio frequency signals to form continuous interference radio frequency signals, and enter step AB-3.
  • Step AB-3 Detect whether the main radio frequency read/write antenna emits radio frequency signals, and enter step AB-4; otherwise, repeat step AB-3.
  • Step AB-4 Determine whether the radio frequency signal transmitted by the main radio frequency read-write antenna in step AB-3 needs a return signal from the radio frequency tag, and if yes, enter step AB-5; otherwise, return to step AB-3.
  • Step AB-5 Control the auxiliary radio frequency reading and writing antenna to stop continuously transmitting radio frequency signals, and enter step B.
  • Step B Controlling the auxiliary radio frequency read-write antenna to emit radio frequency signals to form an interference radio frequency signal, and the duration of the interference radio frequency signal is shorter than the duration of the radio frequency signal emitted by the main radio frequency read/write antenna. And in the application, the duration of the interfering radio frequency signal emitted by the auxiliary radio frequency read-write antenna is shorter than that of any type of radio frequency signal.
  • the target radio frequency tag Tag A is vacant.
  • the time period for returning signals to the main RF read-write antenna so as to prevent other RF tags from responding to the RF signal from the target RF tag Tag A by interfering with the RF signal, and avoid the target RF tag Tag A returning signals to the main RF read-write antenna
  • the time period can ensure that the main radio frequency read-write antenna can accurately receive the response signal from the target radio frequency tag Tag A.
  • pure carrier or modulated wave can be used to design and apply the interference radio frequency signal, but the interference effect of modulated wave is better than that of pure carrier.
  • the present invention further designs a corresponding system, as shown in Figure 4, based on the main radio frequency read-write antenna and the auxiliary radio frequency read-write antenna, a coupler is further designed and added .
  • the main radio frequency read-write antenna includes a main radio frequency reader-writer, a coupler, and a main radio-frequency antenna connected in series in sequence
  • the auxiliary radio-frequency read-write antenna includes an auxiliary radio-frequency reader-writer and an auxiliary radio-frequency antenna connected to each other
  • the coupler is connected with the radio frequency demodulation circuit at the same time
  • the radio frequency demodulation circuit is connected with the auxiliary radio frequency reader.
  • the transmitting end of the main RF antenna faces the target RF tag Tag A
  • the transmitting end of the auxiliary RF antenna faces other RF tags Tag B
  • the distance between the target RF tag Tag A and the main RF antenna is smaller than the distance between it and the auxiliary RF antenna.
  • the distance between other radio frequency tags Tag B and the auxiliary radio frequency antenna is smaller than the distance between it and the main radio frequency antenna.
  • the main RF reader generates RF signals and sends them to the connected coupler.
  • the coupler divides the received RF signals into two channels, one of which continues to be sent to the main RF antenna for outward emission, and the other RF signal Send to the RF demodulation circuit, the RF demodulation circuit detects and analyzes the received RF signal, and judges whether the RF signal emitted by the main RF read-write antenna needs a return signal from the RF tag, and further the RF demodulation circuit Trigger the auxiliary RF reader to generate a RF signal, which is transmitted outward through the auxiliary RF antenna.
  • the system that obtains the anti-falsification reading method of radio frequency signals when the system is applied to the article conveyor belt system, as shown in Figure 5, includes at least one main radio frequency read-write antenna and at least one auxiliary radio frequency read-write antenna ;
  • Each item conveyed in the item conveyor belt system is equipped with a radio frequency tag;
  • each main radio frequency read-write antenna is set on both sides of the conveyor belt corresponding to the preset radio frequency detection position, and the transmitting ends of each main radio frequency read-write antenna point to the preset Conveyor belt at the radio frequency detection position;
  • each auxiliary radio frequency reading and writing antenna is located on the side of the preset radio frequency detection position facing the conveying direction of the conveyor belt, and each auxiliary radio frequency reading and writing antenna is located on both sides of the conveyor belt at this position, and each auxiliary radio frequency reading and writing antenna
  • the radio frequency tags on the articles constitute the radio frequency tags;
  • the target radio frequency tag Tag A is formed; the radio frequency demodulation circuit performs the above-mentioned radio frequency signal anti-falsification reading method, and realizes the communication between the main radio frequency read-write antenna and the target radio frequency tag Tag A.
  • the item conveyor belt system In the application of the item conveyor belt system, it can prevent tampering without shielding, and can effectively limit the reading range. And in the reading situation of high-speed conveyor belt, the distance between boxes of 60cm*40cm*40cm can be controlled at a distance of 60cm without cross-reading. This solution completely solves cross-reading and improves the reading speed.
  • the radio frequency signal anti-falsification reading method designed by the above technical solution adopts a new radio frequency work design, based on the separate detection of each radio frequency signal emitted by the main radio frequency read/write antenna, the trigger generation is different from the radio frequency signals emitted by the main radio frequency read/write antenna
  • the synchronized interfering radio frequency signals act on other radio frequency tags Tag B except the target radio frequency tag Tag A, preventing other radio frequency tags Tag B from feeding back radio frequency signals to the main radio frequency read-write antenna, ensuring that the main radio frequency read-write antenna is accurate to the target radio frequency
  • the accuracy of tag Tag A detection, and the design of the corresponding system, the combination of the coupler and the RF demodulation circuit realizes the separate detection of each RF signal from the main RF read-write antenna, and triggers the generation of various interference RF signals, It acts on other radio frequency tags Tag B to realize the application of the designed radio frequency signal anti-falsification reading method.
  • the designed system is applied to the article conveyor belt system, and the distribution settings are made for each module in the design system according to the transmission direction of the conveyor belt.
  • the application and implementation of the radio frequency signal anti-falsification reading method can effectively improve the efficiency of radio frequency identification of items on the conveyor belt.

Abstract

The present invention relates to an anti-channeling reading method for radio-frequency signals. On the basis of the detection of radio-frequency signals which are transmitted by a primary radio-frequency read/write antenna, the generation of radio-frequency interference signals, which are respectively synchronized with the radio-frequency signals which are transmitted by the primary radio-frequency read/write antenna, is triggered, and the radio-frequency interference signals act on radio-frequency tags other than a target radio-frequency tag, so as to prevent other radio-frequency tags from feeding back radio-frequency signals to the primary radio-frequency read/write antenna, thereby ensuring the accuracy of the primary radio-frequency read/write antenna monitoring the target radio-frequency tag. Moreover, a corresponding system is designed, in which a coupler is combined with a radio-frequency demodulation circuit, so as to respectively detect radio-frequency signals from a primary radio-frequency read/write antenna, and trigger the generation of radio-frequency interference signals, which act on other radio-frequency tags. In addition, the designed system is applied to an article conveyor belt system, and modules in the designed system are arranged in a distributed manner according to the conveying direction of a conveyor belt, such that the radio-frequency identification efficiency for articles on the conveyor belt can be effectively improved.

Description

一种射频信号防窜读读取方法及系统、应用A method, system, and application of radio frequency signal anti-falsification reading 技术领域technical field
本发明涉及一种射频信号防窜读读取方法及系统、应用，属于射频技术领域。The invention relates to a radio frequency signal anti-falsification reading method, system and application, belonging to the field of radio frequency technology.
背景技术Background technique
RFID透过电磁波读取Tag时,因为电磁波无法100％控制辐射方向，使得RFID reader经天线辐射的电磁波会窜读到不该读取的空间Tag，如图1所示；现有技术中一般使用吸波材，但是吸波材料也不能完全吸收窜读讯号，尤其在不能遮蔽Tag的开放可视空间，利用RSSI也无法准确判读Tag离天线的正确距离，尤其是当被窜读的Tag距离要读取的Tag很近时，因此目前关于射频的窜读问题还是无法很好的解决。When RFID reads Tags through electromagnetic waves, because the electromagnetic waves cannot 100% control the radiation direction, the electromagnetic waves radiated by the RFID reader through the antenna will read the space Tags that should not be read, as shown in Figure 1; generally used in the prior art However, the absorbing material cannot completely absorb the falsified reading signal, especially in the open visible space where the tag cannot be covered, and the correct distance between the tag and the antenna cannot be accurately judged by using RSSI, especially when the distance of the falsified tag is longer than that of the antenna. When the tag to be read is very close, the current problem of falsification of radio frequency cannot be solved well.
发明内容Contents of the invention
本发明所要解决的技术问题是提供一种射频信号防窜读读取方法，采用全新射频工作设计，设计在侦测到射频读写器发射射频信号的同时，触发干扰射频信号的发射，保证目标射频标签返回信号的准确性。The technical problem to be solved by the present invention is to provide a radio frequency signal anti-fleeing reading method, which adopts a new radio frequency work design, and is designed to trigger the emission of interference radio frequency signals while detecting the radio frequency signal emitted by the radio frequency reader, so as to ensure the target The accuracy of the signal returned by the radio frequency tag.
本发明为了解决上述技术问题采用以下技术方案：本发明设计了一种射频信号防窜读读取方法，针对主射频读写天线所对应射频通信范围内存在目标射频标签与其它射频标签的场景，结合辅助射频读写天线，以及主射频读写天线发射端面向目标射频标签，辅助射频读写天线发射端面向其它射频标签，且目标射频标签与主射频读写天线之间距离小于其与辅助射频读写天线之间距离，其它射频标签与辅助射频读写天线之间距离小于其与主射频读写天线之间距离，实时执行如下步骤，实现主射频读写天线与目标射频标签之间的通信；In order to solve the above technical problems, the present invention adopts the following technical solutions: the present invention designs a radio frequency signal anti-false reading method, aiming at the scene where there are target radio frequency tags and other radio frequency tags in the radio frequency communication range corresponding to the main radio frequency read and write antenna, Combined with the auxiliary RF read-write antenna, and the transmitter of the main RF read-write antenna faces the target RF tag, the transmitter of the auxiliary RF read-write antenna faces other RF tags, and the distance between the target RF tag and the main RF read-write antenna is smaller than that of the auxiliary RF The distance between the read-write antennas, the distance between other RF tags and the auxiliary RF read-write antenna is smaller than the distance between it and the main RF read-write antenna, perform the following steps in real time to realize the communication between the main RF read-write antenna and the target RF tag ;
步骤A.侦测主射频读写天线是否发射射频信号，是则进入步骤B；否则重复执行步骤A；Step A. Detect whether the main RF read/write antenna emits RF signals, if yes, enter step B; otherwise, repeat step A;
步骤B.控制辅助射频读写天线发射射频信号，构成干扰射频信号，且该干扰射频信号的时长小于主射频读写天线所发射射频信号的时长。Step B. Controlling the auxiliary radio frequency read-write antenna to emit radio frequency signals to form an interference radio frequency signal, and the duration of the interference radio frequency signal is shorter than the duration of the radio frequency signal emitted by the main radio frequency read/write antenna.
作为本发明的一种优选技术方案：还包括步骤AB-1至步骤AB-5如下，所述步骤A中，当侦测到主射频读写天线发射射频信号时，进入步骤AB-1；As a preferred technical solution of the present invention: it also includes step AB-1 to step AB-5 as follows, in said step A, when it is detected that the main radio frequency read-write antenna transmits a radio frequency signal, enter step AB-1;
步骤AB-1.判断由主射频读写天线所发射的射频信号是否需要射频标签返回信号，是则进入步骤B；否则进入步骤AB-2；Step AB-1. Determine whether the radio frequency signal transmitted by the main radio frequency read-write antenna needs a return signal from the radio frequency tag, and if so, enter step B; otherwise, enter step AB-2;
步骤AB-2.控制辅助射频读写天线开始持续发射射频信号，构成持续干扰射频信号， 并进入步骤AB-3；Step AB-2. Control the auxiliary radio frequency reading and writing antenna to start continuously transmitting radio frequency signals, forming continuous interference radio frequency signals, And go to step AB-3;
步骤AB-3.侦测主射频读写天线是否发射射频信号，是进入步骤AB-4；否则重复执行步骤AB-3；Step AB-3. Detect whether the main radio frequency read-write antenna emits radio frequency signals, and enter step AB-4; otherwise, repeat step AB-3;
步骤AB-4.判断步骤AB-3中由主射频读写天线所发射的射频信号是否需要射频标签返回信号，是则进入步骤AB-5；否则返回步骤AB-3；Step AB-4. Determine whether the radio frequency signal transmitted by the main radio frequency read-write antenna in step AB-3 needs a radio frequency tag return signal, and if so, enter step AB-5; otherwise return to step AB-3;
步骤AB-5.控制辅助射频读写天线停止持续发射射频信号，并进入步骤B。Step AB-5. Control the auxiliary radio frequency reading and writing antenna to stop continuously transmitting radio frequency signals, and enter step B.
作为本发明的一种优选技术方案：所述步骤B中由辅助射频读写天线所发射干扰射频信号的时长小于任意类型射频信号的时长。As a preferred technical solution of the present invention: in the step B, the duration of the interfering radio frequency signal transmitted by the auxiliary radio frequency read-write antenna is shorter than the duration of any type of radio frequency signal.
与上述相对应，本发明还要解决的技术问题是提供一种实现射频信号防窜读读取方法的系统，引入耦合器，实现主射频读写天线与辅助射频读写天线的联合应用，完成所设计射频信号防窜读读取方法，在侦测到射频读写器发射射频信号的同时，触发干扰射频信号的发射，保证目标射频标签返回信号的准确性。Corresponding to the above, the technical problem to be solved in the present invention is to provide a system for realizing the method of anti-slipping reading of radio frequency signals, introduce a coupler, realize the joint application of the main radio frequency read-write antenna and the auxiliary radio frequency read-write antenna, and complete The designed RF signal anti-falsification reading method, while detecting the RF signal emitted by the RF reader, triggers the emission of the interference RF signal to ensure the accuracy of the signal returned by the target RF tag.
本发明为了解决上述技术问题采用以下技术方案：本发明设计了一种射频信号防窜读读取方法的系统，基于主射频读写天线、辅助射频读写天线，包括耦合器、射频解调变电路；主射频读写天线包括依次串联的主射频读写器、耦合器、主射频天线，辅助射频读写天线包括彼此相连的辅助射频读写器与辅助射频天线；其中，耦合器同时与射频解调变电路相连接，射频解调变电路与辅助射频读写器相连接；In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: the present invention designs a system of radio frequency signal anti-alteration reading method, based on the main radio frequency read-write antenna, auxiliary radio frequency read-write antenna, including coupler, radio frequency demodulator circuit; the main radio frequency read-write antenna includes a main radio frequency reader-writer, a coupler, and a main radio-frequency antenna connected in series in sequence, and the auxiliary radio-frequency read-write antenna includes an auxiliary radio-frequency reader-writer and an auxiliary radio-frequency antenna connected to each other; The demodulation circuit is connected, and the radio frequency demodulation circuit is connected with the auxiliary radio frequency reader;
主射频天线发射端面向目标射频标签，辅助射频天线发射端面向其它射频标签，且目标射频标签与主射频天线之间距离小于其与辅助射频天线之间距离，其它射频标签与辅助射频天线之间距离小于其与主射频天线之间距离；The transmitting end of the main RF antenna faces the target RF tag, the transmitting end of the auxiliary RF antenna faces other RF tags, and the distance between the target RF tag and the main RF antenna is smaller than the distance between it and the auxiliary RF antenna, and the distance between other RF tags and the auxiliary RF antenna The distance is less than the distance between it and the main radio frequency antenna;
主射频读写器产生射频信号，并发送至所连接的耦合器，由耦合器将所接收射频信号分为两路，其中一路射频信号继续发送至主射频天线实现向外发射，另一路射频信号发送至射频解调变电路，由射频解调变电路针对所接收射频信号进行侦测分析，并由射频解调变电路触发辅助射频读写器产生射频信号，通过辅助射频天线实现向外发射。The main RF reader generates RF signals and sends them to the connected coupler. The coupler divides the received RF signals into two channels, one of which continues to be sent to the main RF antenna for outward emission, and the other RF signal Send to the radio frequency demodulation circuit, the radio frequency demodulation circuit detects and analyzes the received radio frequency signal, and the radio frequency demodulation circuit triggers the auxiliary radio frequency reader to generate the radio frequency signal, and realizes the outward emission through the auxiliary radio frequency antenna.
作为本发明的一种优选技术方案：由所述射频解调变电路执行上述射频信号防窜读读取方法，实现主射频读写天线与目标射频标签之间的通信。As a preferred technical solution of the present invention: the radio frequency demodulation circuit executes the above radio frequency signal tamper-proof reading method to realize the communication between the main radio frequency read-write antenna and the target radio frequency tag.
与上述相对应，本发明还要解决的技术问题是提供一种实现射频信号防窜读读取方法的系统的应用，应用于物品传送带系统，通过设计方法与系统的应用，能够有效提高对传送带上物品的射频识别效率。Corresponding to the above, the technical problem to be solved in the present invention is to provide an application of a system for realizing the anti-falsification reading method of radio frequency signals, which is applied to the article conveyor belt system. The radio frequency identification efficiency of items on the Internet.
本发明为了解决上述技术问题采用以下技术方案：本发明设计了一种射频信号防窜读 读取方法的系统的应用，应用于物品传送带系统，包括至少一个主射频读写天线、以及至少一个辅助射频读写天线；物品传送带系统中所传送的各个物品上分别均设置射频标签；各主射频读写天线设置于预设射频检测位置对应传送带的两侧，且各主射频读写天线的发射端均指向预设射频检测位置的传送带；各个辅助射频读写天线位于预设射频检测位置迎向传送带传送方向的一侧，且各辅助射频读写天线分别位于该位置传送带的两侧，以及各辅助射频读写天线的发射端均以迎向传送带传送方向的方向指向传送带表面；In order to solve the above technical problems, the present invention adopts the following technical solutions: the present invention designs a radio frequency signal anti-false reading The application of the reading method system is applied to the article conveyor belt system, including at least one main radio frequency read-write antenna and at least one auxiliary radio frequency read-write antenna; radio frequency tags are respectively set on each article conveyed in the article conveyor belt system; each main radio frequency The RF read-write antennas are set on both sides of the conveyor belt corresponding to the preset RF detection position, and the transmitting ends of each main RF read-write antenna point to the conveyor belt at the preset RF detection position; each auxiliary RF read-write antenna is located at the preset RF detection position. To the side of the conveying direction of the conveyor belt, and each auxiliary radio frequency read-write antenna is located on both sides of the conveyor belt at this position, and the transmitting end of each auxiliary radio frequency read-write antenna is directed to the conveyor belt surface in a direction facing the conveying direction of the conveyor belt;
所传送物品随传送带传送至各辅助射频读写天线发射端所指向传送带表面区域时，物品上的射频标签构成射频标签；所传送物品随传送带传送至预设射频检测位置时，物品上的射频标签构成目标射频标签；由所述射频解调变电路执行上述射频信号防窜读读取方法，实现主射频读写天线与目标射频标签之间的通信。When the conveyed items are conveyed with the conveyor belt to the surface area of the conveyor belt pointed by the transmitting end of each auxiliary RF read-write antenna, the radio frequency tags on the articles constitute the radio frequency tags; A target radio frequency tag is formed; the radio frequency demodulation circuit executes the above radio frequency signal anti-falsification reading method to realize the communication between the main radio frequency read-write antenna and the target radio frequency tag.
本发明所述一种射频信号防窜读读取方法及系统、应用，采用以上技术方案与现有技术相比，具有以下技术效果：According to the present invention, a method, system, and application for anti-falsification reading of radio frequency signals have the following technical effects compared with the prior art by adopting the above technical scheme:
(1)本发明所设计射频信号防窜读读取方法，采用全新射频工作设计，基于对主射频读写天线发射各射频信号的分别侦测，触发产生与主射频读写天线所发射各射频信号分别同步的各干扰射频信号，作用于除目标射频标签以外的其它射频标签上，防止其它射频标签向主射频读写天线反馈射频信号，保证了主射频读写天线对目标射频标签侦测的准确性，并设计相对应系统，由耦合器与射频解调变电路组合，实现对来自主射频读写天线各射频信号的分别侦测，并触发产生各干扰射频信号，作用于其它射频标签，实现所设计射频信号防窜读读取方法的应用，此外将所设计系统应用于物品传送带系统，根据传送带的传输方向，针对设计系统中的各个模块进行分布设置，应用实施射频信号防窜读读取方法，能够有效提高对传送带上物品的射频识别效率。(1) The radio frequency signal anti-false reading method designed in the present invention adopts a new radio frequency work design, based on the respective detection of each radio frequency signal emitted by the main radio frequency read/write antenna, trigger generation and each radio frequency emitted by the main radio frequency read/write antenna The interfering radio frequency signals that are synchronized separately act on other radio frequency tags except the target radio frequency tag, preventing other radio frequency tags from feeding back radio frequency signals to the main radio frequency read and write antenna, and ensuring the detection accuracy of the main radio frequency read and write antenna to the target radio frequency tag Accuracy, and design the corresponding system, the combination of the coupler and the radio frequency demodulation circuit, realize the separate detection of each radio frequency signal from the main radio frequency read and write antenna, and trigger the generation of various interference radio frequency signals, which act on other radio frequency tags, Realize the application of the designed RF signal anti-falsification reading method. In addition, the designed system is applied to the article conveyor belt system. According to the transmission direction of the conveyor belt, distribution settings are made for each module in the design system, and the application implements the RF signal anti-false reading and reading This method can effectively improve the efficiency of radio frequency identification of items on the conveyor belt.
附图说明Description of drawings
图1是现有技术中射频信号的工作示意图；Fig. 1 is the working schematic diagram of the radio frequency signal in the prior art;
图2是本发明所设计射频信号防窜读读取方法的工作示意图；Fig. 2 is the working schematic diagram of the radio frequency signal anti-falsification reading method designed by the present invention;
图3是本发明所设计射频信号防窜读读取方法的信号收发示意图；Fig. 3 is a schematic diagram of signal sending and receiving of the radio frequency signal anti-falsification reading method designed by the present invention;
图4是本发明所设计射频信号防窜读读取方法的系统的结构示意图；Fig. 4 is the structural representation of the system of the radio frequency signal anti-falsification reading method designed by the present invention;
图5是本发明所设计射频信号防窜读读取方法的系统的应用结构示意图。Fig. 5 is a schematic diagram of the application structure of the system of the radio frequency signal anti-falsification reading method designed in the present invention.
具体实施方式Detailed ways
下面结合说明书附图对本发明的具体实施方式作进一步详细的说明。The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
本发明所设计一种射频信号防窜读读取方法，针对主射频读写天线所对应射频通信范 围内存在目标射频标签Tag A与其它射频标签Tag B的场景，如图2所示，结合辅助射频读写天线，以及主射频读写天线发射端面向目标射频标签Tag A，辅助射频读写天线发射端面向其它射频标签Tag B，且目标射频标签Tag A与主射频读写天线之间距离小于其与辅助射频读写天线之间距离，其它射频标签Tag B与辅助射频读写天线之间距离小于其与主射频读写天线之间距离，如图3所示，实时执行如下步骤A至步骤B，实现主射频读写天线与目标射频标签Tag A之间的通信。The present invention designs a radio frequency signal anti-false reading method, aiming at the radio frequency communication range corresponding to the main radio frequency read and write antenna. The scene where the target RF tag Tag A and other RF tags Tag B exist in the surrounding area, as shown in Figure 2, combined with the auxiliary RF read-write antenna, and the transmitting end of the main RF read-write antenna faces the target RF tag Tag A, and the auxiliary RF read-write antenna The transmitter faces other RF tag Tag B, and the distance between the target RF tag Tag A and the main RF read-write antenna is smaller than the distance between it and the auxiliary RF read-write antenna, and the distance between other RF tag Tag B and the auxiliary RF read-write antenna Less than the distance between it and the main radio frequency read-write antenna, as shown in Figure 3, perform the following steps A to B in real time to realize the communication between the main radio frequency read-write antenna and the target radio frequency tag Tag A.
步骤A.侦测主射频读写天线是否发射射频信号，是则进入步骤B；否则重复执行步骤A。Step A. Detect whether the main RF read/write antenna emits RF signals, if yes, enter step B; otherwise, repeat step A.
步骤B.控制辅助射频读写天线发射射频信号，构成干扰射频信号，且该干扰射频信号的时长小于主射频读写天线所发射射频信号的时长。Step B. Controlling the auxiliary radio frequency read-write antenna to emit radio frequency signals to form an interference radio frequency signal, and the duration of the interference radio frequency signal is shorter than the duration of the radio frequency signal emitted by the main radio frequency read/write antenna.
并且在实际应用中，具体考虑射频读写器所发射的不同类型射频信号，其中包括需要相应射频标签返回信号的射频信号，以及不需要相应射频标签返回信号的射频信号，对此针对上述步骤A至步骤B的执行过程中，进一步加入步骤AB-1至步骤AB-5如下，则如图3所示，实时执行如下步骤A至步骤B，实现主射频读写天线与目标射频标签Tag A之间的通信。And in practical applications, specifically consider the different types of radio frequency signals emitted by the radio frequency reader, including radio frequency signals that require corresponding radio frequency tag return signals, and radio frequency signals that do not require corresponding radio frequency tag return signals. For this, for the above step A During the execution of step B, step AB-1 to step AB-5 are further added as follows, as shown in Figure 3, the following steps A to step B are executed in real time to realize the communication between the main radio frequency read-write antenna and the target radio frequency tag Tag A communication between.
步骤A.侦测主射频读写天线是否发射射频信号，是则进入步骤AB-1；否则重复执行步骤A。Step A. Detect whether the main RF read-write antenna emits RF signals, if yes, enter step AB-1; otherwise, repeat step A.
步骤AB-1.判断由主射频读写天线所发射的射频信号是否需要射频标签返回信号，是则进入步骤B；否则进入步骤AB-2。Step AB-1. Determine whether the radio frequency signal transmitted by the main radio frequency read-write antenna needs a return signal from the radio frequency tag, and if yes, proceed to step B; otherwise, proceed to step AB-2.
步骤AB-2.控制辅助射频读写天线开始持续发射射频信号，构成持续干扰射频信号，并进入步骤AB-3。Step AB-2. Control the auxiliary radio frequency reading and writing antenna to start continuously transmitting radio frequency signals to form continuous interference radio frequency signals, and enter step AB-3.
步骤AB-3.侦测主射频读写天线是否发射射频信号，是进入步骤AB-4；否则重复执行步骤AB-3。Step AB-3. Detect whether the main radio frequency read/write antenna emits radio frequency signals, and enter step AB-4; otherwise, repeat step AB-3.
步骤AB-4.判断步骤AB-3中由主射频读写天线所发射的射频信号是否需要射频标签返回信号，是则进入步骤AB-5；否则返回步骤AB-3。Step AB-4. Determine whether the radio frequency signal transmitted by the main radio frequency read-write antenna in step AB-3 needs a return signal from the radio frequency tag, and if yes, enter step AB-5; otherwise, return to step AB-3.
步骤AB-5.控制辅助射频读写天线停止持续发射射频信号，并进入步骤B。Step AB-5. Control the auxiliary radio frequency reading and writing antenna to stop continuously transmitting radio frequency signals, and enter step B.
步骤B.控制辅助射频读写天线发射射频信号，构成干扰射频信号，且该干扰射频信号的时长小于主射频读写天线所发射射频信号的时长。并且在应用中，由辅助射频读写天线所发射干扰射频信号的时长小于任意类型射频信号的时长。Step B. Controlling the auxiliary radio frequency read-write antenna to emit radio frequency signals to form an interference radio frequency signal, and the duration of the interference radio frequency signal is shorter than the duration of the radio frequency signal emitted by the main radio frequency read/write antenna. And in the application, the duration of the interfering radio frequency signal emitted by the auxiliary radio frequency read-write antenna is shorter than that of any type of radio frequency signal.
如此按上述设计，即针对干扰射频信号的设计与应用中，空出目标射频标签Tag A 向主射频读写天线返回信号的时间段，这样通过干扰射频信号避免其他射频标签对来自目标射频标签Tag A射频信号的响应，而避开目标射频标签Tag A向主射频读写天线返回信号的时间段，能够保证主射频读写天线对来自目标射频标签Tag A响应信号的准确接收。In this way, according to the above design, in the design and application of interfering radio frequency signals, the target radio frequency tag Tag A is vacant. The time period for returning signals to the main RF read-write antenna, so as to prevent other RF tags from responding to the RF signal from the target RF tag Tag A by interfering with the RF signal, and avoid the target RF tag Tag A returning signals to the main RF read-write antenna The time period can ensure that the main radio frequency read-write antenna can accurately receive the response signal from the target radio frequency tag Tag A.
并且在实际应用当中，设计应用的干扰射频信号，可以采用纯载波或者是调变波，但是调变波的干扰效果比纯载波更好。And in practical applications, pure carrier or modulated wave can be used to design and apply the interference radio frequency signal, but the interference effect of modulated wave is better than that of pure carrier.
针对上述所设计射频信号防窜读读取方法的实际应用，本发明进一步设计了相对应的系统，如图4所示，基于主射频读写天线与辅助射频读写天线，进一步设计加入耦合器、射频解调变电路；其中，主射频读写天线包括依次串联的主射频读写器、耦合器、主射频天线，辅助射频读写天线包括彼此相连的辅助射频读写器与辅助射频天线；其中，耦合器同时与射频解调变电路相连接，射频解调变电路与辅助射频读写器相连接。Aiming at the practical application of the radio frequency signal anti-falsification reading method designed above, the present invention further designs a corresponding system, as shown in Figure 4, based on the main radio frequency read-write antenna and the auxiliary radio frequency read-write antenna, a coupler is further designed and added . Radio frequency demodulation and conversion circuit; wherein, the main radio frequency read-write antenna includes a main radio frequency reader-writer, a coupler, and a main radio-frequency antenna connected in series in sequence, and the auxiliary radio-frequency read-write antenna includes an auxiliary radio-frequency reader-writer and an auxiliary radio-frequency antenna connected to each other; Wherein, the coupler is connected with the radio frequency demodulation circuit at the same time, and the radio frequency demodulation circuit is connected with the auxiliary radio frequency reader.
如图4所示，主射频天线发射端面向目标射频标签Tag A，辅助射频天线发射端面向其它射频标签Tag B，且目标射频标签Tag A与主射频天线之间距离小于其与辅助射频天线之间距离，其它射频标签Tag B与辅助射频天线之间距离小于其与主射频天线之间距离。As shown in Figure 4, the transmitting end of the main RF antenna faces the target RF tag Tag A, and the transmitting end of the auxiliary RF antenna faces other RF tags Tag B, and the distance between the target RF tag Tag A and the main RF antenna is smaller than the distance between it and the auxiliary RF antenna. The distance between other radio frequency tags Tag B and the auxiliary radio frequency antenna is smaller than the distance between it and the main radio frequency antenna.
主射频读写器产生射频信号，并发送至所连接的耦合器，由耦合器将所接收射频信号分为两路，其中一路射频信号继续发送至主射频天线实现向外发射，另一路射频信号发送至射频解调变电路，由射频解调变电路针对所接收射频信号进行侦测分析，判断由主射频读写天线所发射的射频信号是否需要射频标签返回信号，进一步由射频解调变电路触发辅助射频读写器产生射频信号，通过辅助射频天线实现向外发射。The main RF reader generates RF signals and sends them to the connected coupler. The coupler divides the received RF signals into two channels, one of which continues to be sent to the main RF antenna for outward emission, and the other RF signal Send to the RF demodulation circuit, the RF demodulation circuit detects and analyzes the received RF signal, and judges whether the RF signal emitted by the main RF read-write antenna needs a return signal from the RF tag, and further the RF demodulation circuit Trigger the auxiliary RF reader to generate a RF signal, which is transmitted outward through the auxiliary RF antenna.
基于上述设计即获得射频信号防窜读读取方法的系统，当将该系统应用于物品传送带系统时，如图5所示，包括至少一个主射频读写天线、以及至少一个辅助射频读写天线；物品传送带系统中所传送的各个物品上分别均设置射频标签；各主射频读写天线设置于预设射频检测位置对应传送带的两侧，且各主射频读写天线的发射端均指向预设射频检测位置的传送带；各个辅助射频读写天线位于预设射频检测位置迎向传送带传送方向的一侧，且各辅助射频读写天线分别位于该位置传送带的两侧，以及各辅助射频读写天线的发射端均以迎向传送带传送方向的方向指向传送带表面。Based on the above-mentioned design, the system that obtains the anti-falsification reading method of radio frequency signals, when the system is applied to the article conveyor belt system, as shown in Figure 5, includes at least one main radio frequency read-write antenna and at least one auxiliary radio frequency read-write antenna ; Each item conveyed in the item conveyor belt system is equipped with a radio frequency tag; each main radio frequency read-write antenna is set on both sides of the conveyor belt corresponding to the preset radio frequency detection position, and the transmitting ends of each main radio frequency read-write antenna point to the preset Conveyor belt at the radio frequency detection position; each auxiliary radio frequency reading and writing antenna is located on the side of the preset radio frequency detection position facing the conveying direction of the conveyor belt, and each auxiliary radio frequency reading and writing antenna is located on both sides of the conveyor belt at this position, and each auxiliary radio frequency reading and writing antenna The emitting ends of all point to the surface of the conveyor belt in the direction facing the conveying direction of the conveyor belt.
所传送物品随传送带传送至各辅助射频读写天线发射端所指向传送带表面区域时，物品上的射频标签构成射频标签；所传送物品随传送带传送至预设射频检测位置时，物品上的射频标签构成目标射频标签Tag A；由所述射频解调变电路执行上述射频信号防窜读读取方法，实现主射频读写天线与目标射频标签Tag A之间的通信。When the conveyed items are conveyed with the conveyor belt to the surface area of the conveyor belt pointed by the transmitting end of each auxiliary RF read-write antenna, the radio frequency tags on the articles constitute the radio frequency tags; The target radio frequency tag Tag A is formed; the radio frequency demodulation circuit performs the above-mentioned radio frequency signal anti-falsification reading method, and realizes the communication between the main radio frequency read-write antenna and the target radio frequency tag Tag A.
在关于物品传送带系统的应用中，不需要遮蔽就能防止窜读,能有效限制读取范围, 并且在高速输送带的读取情境下,60cm*40cm*40cm箱与箱的距离,能控制在距离60cm不窜读,此方案彻底解决窜读也提升读取速度。In the application of the item conveyor belt system, it can prevent tampering without shielding, and can effectively limit the reading range. And in the reading situation of high-speed conveyor belt, the distance between boxes of 60cm*40cm*40cm can be controlled at a distance of 60cm without cross-reading. This solution completely solves cross-reading and improves the reading speed.
上述技术方案所设计射频信号防窜读读取方法，采用全新射频工作设计，基于对主射频读写天线发射各射频信号的分别侦测，触发产生与主射频读写天线所发射各射频信号分别同步的各干扰射频信号，作用于除目标射频标签Tag A以外的其它射频标签Tag B上，防止其它射频标签Tag B向主射频读写天线反馈射频信号，保证了主射频读写天线对目标射频标签Tag A侦测的准确性，并设计相对应系统，由耦合器与射频解调变电路组合，实现对来自主射频读写天线各射频信号的分别侦测，并触发产生各干扰射频信号，作用于其它射频标签Tag B，实现所设计射频信号防窜读读取方法的应用，此外将所设计系统应用于物品传送带系统，根据传送带的传输方向，针对设计系统中的各个模块进行分布设置，应用实施射频信号防窜读读取方法，能够有效提高对传送带上物品的射频识别效率。The radio frequency signal anti-falsification reading method designed by the above technical solution adopts a new radio frequency work design, based on the separate detection of each radio frequency signal emitted by the main radio frequency read/write antenna, the trigger generation is different from the radio frequency signals emitted by the main radio frequency read/write antenna The synchronized interfering radio frequency signals act on other radio frequency tags Tag B except the target radio frequency tag Tag A, preventing other radio frequency tags Tag B from feeding back radio frequency signals to the main radio frequency read-write antenna, ensuring that the main radio frequency read-write antenna is accurate to the target radio frequency The accuracy of tag Tag A detection, and the design of the corresponding system, the combination of the coupler and the RF demodulation circuit, realizes the separate detection of each RF signal from the main RF read-write antenna, and triggers the generation of various interference RF signals, It acts on other radio frequency tags Tag B to realize the application of the designed radio frequency signal anti-falsification reading method. In addition, the designed system is applied to the article conveyor belt system, and the distribution settings are made for each module in the design system according to the transmission direction of the conveyor belt. The application and implementation of the radio frequency signal anti-falsification reading method can effectively improve the efficiency of radio frequency identification of items on the conveyor belt.
上面结合附图对本发明的实施方式作了详细说明，但是本发明并不限于上述实施方式，在本领域普通技术人员所具备的知识范围内，还可以在不脱离本发明宗旨的前提下做出各种变化。 The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and can also be made without departing from the gist of the present invention within the scope of knowledge possessed by those of ordinary skill in the art. Variations.

Claims (6)

  1. 一种射频信号防窜读读取方法，其特征在于：针对主射频读写天线所对应射频通信范围内存在目标射频标签与其它射频标签的场景，结合辅助射频读写天线，以及主射频读写天线发射端面向目标射频标签，辅助射频读写天线发射端面向其它射频标签，且目标射频标签与主射频读写天线之间距离小于其与辅助射频读写天线之间距离，其它射频标签与辅助射频读写天线之间距离小于其与主射频读写天线之间距离，实时执行如下步骤，实现主射频读写天线与目标射频标签之间的通信；A radio frequency signal anti-falsification reading method, characterized in that: for the scene where there are target radio frequency tags and other radio frequency tags in the radio frequency communication range corresponding to the main radio frequency read and write antenna, combined with the auxiliary radio frequency read and write antenna, and the main radio frequency read and write The transmitting end of the antenna faces the target RF tag, the transmitting end of the auxiliary RF read-write antenna faces other RF tags, and the distance between the target RF tag and the main RF read-write antenna is smaller than the distance between it and the auxiliary RF read-write antenna. The distance between the radio frequency read-write antennas is smaller than the distance between it and the main radio frequency read-write antenna, and the following steps are performed in real time to realize the communication between the main radio frequency read-write antenna and the target radio frequency tag;
    步骤A.侦测主射频读写天线是否发射射频信号，是则进入步骤B；否则重复执行步骤A；Step A. Detect whether the main RF read/write antenna emits RF signals, if yes, enter step B; otherwise, repeat step A;
    步骤B.控制辅助射频读写天线发射射频信号，构成干扰射频信号，且该干扰射频信号的时长小于主射频读写天线所发射射频信号的时长。Step B. Controlling the auxiliary radio frequency read-write antenna to emit radio frequency signals to form an interference radio frequency signal, and the duration of the interference radio frequency signal is shorter than the duration of the radio frequency signal emitted by the main radio frequency read/write antenna.
  2. 根据权利要求1所述一种射频信号防窜读读取方法，其特征在于：还包括步骤AB-1至步骤AB-5如下，所述步骤A中，当侦测到主射频读写天线发射射频信号时，进入步骤AB-1；According to claim 1, a radio frequency signal anti-falsification reading method is characterized in that: it also includes steps AB-1 to step AB-5 as follows, in said step A, when the main radio frequency read/write antenna is detected to emit For radio frequency signals, go to step AB-1;
    步骤AB-1.判断由主射频读写天线所发射的射频信号是否需要射频标签返回信号，是则进入步骤B；否则进入步骤AB-2；Step AB-1. Determine whether the radio frequency signal transmitted by the main radio frequency read-write antenna needs a return signal from the radio frequency tag, and if so, enter step B; otherwise, enter step AB-2;
    步骤AB-2.控制辅助射频读写天线开始持续发射射频信号，构成持续干扰射频信号，并进入步骤AB-3；Step AB-2. Control the auxiliary radio frequency reading and writing antenna to start continuously transmitting radio frequency signals, forming continuous interference radio frequency signals, and enter step AB-3;
    步骤AB-3.侦测主射频读写天线是否发射射频信号，是进入步骤AB-4；否则重复执行步骤AB-3；Step AB-3. Detect whether the main radio frequency read-write antenna emits radio frequency signals, and enter step AB-4; otherwise, repeat step AB-3;
    步骤AB-4.判断步骤AB-3中由主射频读写天线所发射的射频信号是否需要射频标签返回信号，是则进入步骤AB-5；否则返回步骤AB-3；Step AB-4. Determine whether the radio frequency signal transmitted by the main radio frequency read-write antenna in step AB-3 needs a radio frequency tag return signal, and if so, enter step AB-5; otherwise return to step AB-3;
    步骤AB-5.控制辅助射频读写天线停止持续发射射频信号，并进入步骤B。Step AB-5. Control the auxiliary radio frequency reading and writing antenna to stop continuously transmitting radio frequency signals, and enter step B.
  3. 根据权利要求1所述一种射频信号防窜读读取方法，其特征在于：所述步骤B中由辅助射频读写天线所发射干扰射频信号的时长小于任意类型射频信号的时长。According to claim 1, a radio frequency signal anti-falsification reading method is characterized in that: in the step B, the duration of the interfering radio frequency signal transmitted by the auxiliary radio frequency read/write antenna is shorter than the duration of any type of radio frequency signal.
  4. 一种实现权利要求1至3中任意一项所述一种射频信号防窜读读取方法的系统，其特征在于：基于主射频读写天线、辅助射频读写天线，包括耦合器、射频解调变电路；主射频读写天线包括依次串联的主射频读写器、耦合器、主射频天线，辅助射频读写天线包括彼此相连的辅助射频读写器与辅助射频天线；其中，耦合器同时与射频解调变电路相连接，射频解调变电路与辅助射频读写器相连接；A system for implementing a method for anti-falsification reading of radio frequency signals according to any one of claims 1 to 3, characterized in that: based on the main radio frequency read and write antenna, the auxiliary radio frequency read and write antenna, including a coupler, a radio frequency solution Modulation circuit; the main radio frequency read-write antenna includes a main radio frequency reader-writer, a coupler, and a main radio-frequency antenna connected in series, and the auxiliary radio-frequency read-write antenna includes an auxiliary radio-frequency reader-writer and an auxiliary radio-frequency antenna connected to each other; wherein, the coupler simultaneously It is connected with the radio frequency demodulation circuit, and the radio frequency demodulation circuit is connected with the auxiliary radio frequency reader;
    主射频天线发射端面向目标射频标签，辅助射频天线发射端面向其它射频标签，且目标射频标签与主射频天线之间距离小于其与辅助射频天线之间距离，其它射频标签与辅助射频 天线之间距离小于其与主射频天线之间距离；The transmitting end of the main RF antenna faces the target RF tag, the transmitting end of the auxiliary RF antenna faces other RF tags, and the distance between the target RF tag and the main RF antenna is smaller than the distance between it and the auxiliary RF antenna. The distance between the antennas is smaller than the distance between them and the main radio frequency antenna;
    主射频读写器产生射频信号，并发送至所连接的耦合器，由耦合器将所接收射频信号分为两路，其中一路射频信号继续发送至主射频天线实现向外发射，另一路射频信号发送至射频解调变电路，由射频解调变电路针对所接收射频信号进行侦测分析，并由射频解调变电路触发辅助射频读写器产生射频信号，通过辅助射频天线实现向外发射。The main RF reader generates RF signals and sends them to the connected coupler. The coupler divides the received RF signals into two channels, one of which continues to be sent to the main RF antenna for outward emission, and the other RF signal Send to the radio frequency demodulation circuit, the radio frequency demodulation circuit detects and analyzes the received radio frequency signal, and the radio frequency demodulation circuit triggers the auxiliary radio frequency reader to generate the radio frequency signal, and realizes the outward emission through the auxiliary radio frequency antenna.
  5. 根据权利要求4所述一种射频信号防窜读读取方法的系统，其特征在于：由所述射频解调变电路执行上述射频信号防窜读读取方法，实现主射频读写天线与目标射频标签之间的通信。According to claim 4, a system of anti-falsification reading method for radio frequency signals, characterized in that: the radio frequency demodulation circuit executes the above-mentioned method for anti-falsification reading of radio frequency signals, and realizes that the main radio frequency read-write antenna and the target Communication between radio frequency tags.
  6. 一种实现权利要求4至5中任意一项所述一种射频信号防窜读读取方法的系统的应用，其特征在于：应用于物品传送带系统，包括至少一个主射频读写天线、以及至少一个辅助射频读写天线；物品传送带系统中所传送的各个物品上分别均设置射频标签；各主射频读写天线设置于预设射频检测位置对应传送带的两侧，且各主射频读写天线的发射端均指向预设射频检测位置的传送带；各个辅助射频读写天线位于预设射频检测位置迎向传送带传送方向的一侧，且各辅助射频读写天线分别位于该位置传送带的两侧，以及各辅助射频读写天线的发射端均以迎向传送带传送方向的方向指向传送带表面；An application of a system for implementing a radio frequency signal anti-falsification reading method according to any one of claims 4 to 5, characterized in that it is applied to an article conveyor belt system, including at least one main radio frequency read/write antenna, and at least one An auxiliary radio frequency read-write antenna; radio frequency tags are set on each item conveyed in the item conveyor belt system; each main radio frequency read-write antenna is set on both sides of the conveyor belt corresponding to the preset radio frequency detection position, and each main radio frequency read-write antenna The transmitters are all pointing to the conveyor belt at the preset radio frequency detection position; each auxiliary radio frequency read-write antenna is located on the side of the preset radio frequency detection position facing the conveying direction of the conveyor belt, and each auxiliary radio frequency read-write antenna is located on both sides of the conveyor belt at this position, and The transmitting end of each auxiliary radio frequency read-write antenna points to the surface of the conveyor belt in a direction facing the conveying direction of the conveyor belt;
    所传送物品随传送带传送至各辅助射频读写天线发射端所指向传送带表面区域时，物品上的射频标签构成射频标签；所传送物品随传送带传送至预设射频检测位置时，物品上的射频标签构成目标射频标签；由所述射频解调变电路执行上述射频信号防窜读读取方法，实现主射频读写天线与目标射频标签之间的通信。 When the conveyed items are conveyed with the conveyor belt to the surface area of the conveyor belt pointed by the transmitting end of each auxiliary RF read-write antenna, the radio frequency tags on the articles constitute the radio frequency tags; A target radio frequency tag is formed; the radio frequency demodulation circuit executes the above radio frequency signal anti-falsification reading method to realize the communication between the main radio frequency read-write antenna and the target radio frequency tag.
PCT/CN2023/076156 2022-02-21 2023-02-15 Anti-channeling reading method and system for radio-frequency signals, and application of system WO2023155801A1 (en)

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