KR20130121584A - Apparatus and method for recognizing radio frequency identification tag - Google Patents

Apparatus and method for recognizing radio frequency identification tag Download PDF

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Publication number
KR20130121584A
KR20130121584A KR1020120044922A KR20120044922A KR20130121584A KR 20130121584 A KR20130121584 A KR 20130121584A KR 1020120044922 A KR1020120044922 A KR 1020120044922A KR 20120044922 A KR20120044922 A KR 20120044922A KR 20130121584 A KR20130121584 A KR 20130121584A
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KR
South Korea
Prior art keywords
electronic tag
container
radio frequency
antenna
tag
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Application number
KR1020120044922A
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Korean (ko)
Inventor
손영전
전영주
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세연테크놀로지 주식회사
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Priority to KR1020120044922A priority Critical patent/KR20130121584A/en
Publication of KR20130121584A publication Critical patent/KR20130121584A/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10316—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

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

Apparatus and method for identifying a plurality of electronic tags for reading information about a plurality of containers, comprising a plurality of transmit and receive antennas for recognizing an electronic tag, the transmit and receive antennas are the area in which the container with the electronic tag is stored And a control unit for controlling a radio frequency (RF) signal, each of which is located at a position, each of which includes an RF switch connected to an transceiver of the antenna and controls an RF switch control signal to sequentially recognize an electronic tag. . Each transmitting and receiving antenna for reading an electronic tag is provided for each area in which the container is stored, and the electronic tag can be efficiently read without degrading the output in turn through the RF switch. In addition, interference between channels can be eliminated through radio frequency shielding between antennas.

Description

A plurality of electronic tag recognition device {Apparatus and Method for recognizing Radio frequency identification tag}

The present invention relates to an apparatus and method for recognizing electronic tags, and more particularly, to an apparatus and method for identifying a plurality of electronic tags for reading information on a plurality of containers.

BACKGROUND ART Electronic tag recognition systems are known in which communication is performed in a radio frequency (RF) range using high frequency radio signals.

The radio frequency identification system is a next-generation recognition technology that can manage individual information in various fields such as security, traffic, distribution, and the like. Radio frequency identification systems include antennas, transceivers, and transponders as main components, and are widely used in access control systems and electronic payment systems.

The basic principle of the electronic tag recognition system is to generate a response signal by generating a unique frequency in the device that analyzes the electronic tag, and use it as a power supply and a signal transmission in the electronic tag. To be aware of existence. Electronic tags can be implemented in simple spaces in a narrow space, so they are mainly used for transportation cards, credit cards, etc., and electronic tag recognition ranges from a few cm to several tens of meters. Frequently, the frequency of about 13.5MHz is used for transportation cards and credit cards, and the frequency of 900MHz is also used for logistics management. As such, the electronic tag can be recognized wirelessly and is widely used in various fields.

However, in reading a plurality of electronic tags at one time using such an electronic tag system, there is a limit of output to recognize one antenna or several antennas at once.

Embodiments of the present invention provide an electronic tag recognizing method and an electronic tag recognizing apparatus capable of sequentially recognizing positional information of a plurality of containers to which an electronic tag is attached through an electronic tag.

In one aspect of the present invention, an electronic tag recognition apparatus for recognizing a plurality of containers with an electronic tag in turn through an RF switch, controlling the output of a radio frequency (RF) signal or an RF switch control signal for recognizing the electronic tag. And a plurality of transmission and reception antennas for outputting radio frequency (RF) signals or recognizing electronic tags, respectively, according to a control signal of the control unit and the control unit. Each may include a transceiver that includes an RF switch connected to the transceiver of the antenna.

As an aspect of the present invention, the transceiver unit has the same number of antennas and the number of electronic tags attached to the container, and can recognize an output or output response of the RF signal at 1: 1.

As an aspect of the present invention, the transceiver includes a shielding agent member having an electromagnetic shielding function, and an area excluding an electromagnetic tag corresponding to each antenna through the member may form RF shielding. have.

As an aspect of the present invention, the transceiver is mounted on the PCB, the PCB can be RF shielding (RF Sheilding) through the interlayer structure.

As an aspect of the present invention, the transceiver is mounted on the PCB, the antenna can be shielded using a shielding agent or a shield of other metals in the remaining portion except where the antenna is located.

As one aspect of the present invention may further include a display unit for displaying the container information including the number of the container or the position information is not received the container.

Provided is a method and apparatus for recognizing position information of a plurality of containers with an electronic tag, and having a transmitting / receiving antenna for reading the electronic tag in each area where the container is stored, and outputting the electronic tag in turn through an RF switch. It can read efficiently without deterioration. In addition, interference between channels can be eliminated through radio frequency shielding between antennas.

1 is a block diagram of an electronic tag recognition apparatus for recognizing position information of a plurality of containers according to an embodiment of the present invention.
2 is a block diagram of a transceiver 100 of an electronic tag recognition apparatus according to an embodiment of the present invention.
3 is a configuration diagram of one antenna of a transceiver of an electronic tag recognition apparatus according to an embodiment of the present invention.
4 is a coupling diagram of an electronic tag recognition apparatus in which a plurality of containers are accommodated according to an embodiment of the present invention.
5 is a flowchart illustrating an electronic tag recognition method for recognizing location information of a plurality of containers according to an embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the terms described below are defined in consideration of the functions of the present invention, and this may vary depending on the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

1 is a block diagram of an RFID recognition apparatus for recognizing location information of a plurality of containers according to an embodiment of the present invention.

Referring to FIG. 1, an electronic tag is classified into an active tag or a passive tag according to whether there is a power supply, and low frequency (125 kHz, 135 kHz) and high frequency (high frequency: 13.56 MHz). It is used in various frequency bands such as UHF band (400MHz to 960MHz) and microwave (2.45GHz). Hereinafter, the present invention will be described based on a passive electronic tag operating in a high frequency band.

In one embodiment of the present invention relates to an electronic tag recognition device for sequentially recognizing a plurality of containers with a passive electronic tag attached to the RF switch, the passive electronic tag included in the plurality of containers is built in the IC chip, Tag identification information stored in the IC chip can be read and decrypted in a non-contact manner using radio frequency. Meanwhile, the RF switch may include a relay, a PIN diode, and the like.

In one embodiment, the electronic tag may be inserted or attached to the bottom surface of the container, the position of the electronic tag may vary depending on the position of the transceiver 100.

The passive electronic tag may transmit the tag identification information stored in the tag to the transceiver 100. In addition, the passive electronic tag may include an IC chip that receives energy and receives energy and modulates a part of the radio signal to transmit tag identification information to the transceiver 100.

In order to recognize electronic tags attached to a plurality of containers, the transceiver 100 includes a plurality of antennas for transmitting radio signals at regular intervals, and includes an electronic tag reader for recognizing signals transmitted from a passive electronic tag. It may include.

The transceiver 100 may output each radio frequency (RF) signal from a plurality of transmit / receive antennas according to a control signal of the controller 200, and recognize an electronic tag from a response signal for the output.

In addition, a plurality of transmit and receive antennas of the transceiver 100 may be positioned for each area in which a container with an electronic tag is attached on a substrate including a PCB, and the antennas may be disposed at predetermined intervals in the received area. The present invention is not limited thereto, but may be disposed by appropriately adjusting the density according to the size of the container, the position recognition precision, and the communication range with the electronic tag reader.

The transceiver 100 may match the number of the electronic tags and the transmit / receive antennas so that the antennas of the corresponding positions are matched 1: 1 by reading only the electronic tags of the corresponding area. Therefore, except for the region where a plurality of transmitting and receiving antennas are arranged, since the other electronic tag can be recognized by each antenna during RF transmission, radio frequency shielding can be performed to prevent channel interference. In addition, a plurality of transmitting and receiving antennas may be arranged on the PCB, and because the radio frequency (RF) characteristics are induced on the signal line, the radio frequency (RF) signal is induced to recognize a tag in another antenna. Radio frequency shielding on PCBs can also be achieved, including a masking agent member with electromagnetic shielding. The masking agent member having an electromagnetic shielding function may include a plate member formed of copper or silver, and may include a shielding material applied to a surface of the upper surface of the plate member. For example, the shielding may be used in combination with titanium oxide, strium oxide, barium oxide and bismuth oxide to increase the dielectric constant.

In addition, the display unit may further include a display unit configured to display position information, in which the container is not stored, or container information including the number of containers, based on the signal received by the transceiver 100.

On the other hand, the control unit 200 may output a radio frequency (RF) signal in order to recognize the electronic tag or control the signal for transmission and reception to the antenna in turn through the control of the RF switch connected to the radio frequency signal output.

That is, the controller 200 may perform wireless communication with the electronic tag through a predetermined number of antennas among the plurality of antennas of the transceiver 100 while controlling switching of the RF switch at high speed. The predetermined number may be set according to the strength, power consumption, and electronic tag recognition distance of the RF output signal including at least one antenna.

2 is a block diagram of a transceiver 100 of an electronic tag recognition apparatus according to an embodiment of the present invention. 3 is a configuration diagram of one antenna of a transceiver of an electronic tag recognition apparatus according to an embodiment of the present invention.

2 and 3, the transceiver 100 may include a plurality of RF switches 130 and antennas 150. The transceiver 100 may sequentially transmit radio frequency (RF) signals using the plurality of antennas 150 to obtain electronic tag identification information, and may receive radio frequency (RF) signals from the electronic tag. .

In this transmission process, the transceiver 100 performs wireless communication with the electronic tag through a predetermined number of antennas while controlling a plurality of antennas 150 at high speed by the controller. That is, by using a plurality of antennas 150 to output and radiate a radio frequency (RF) signal periodically for an information request to the corresponding area of the electronic tag recognition portion, the electronic tag is a radio frequency (RF) output signal After receiving the tag identification information is generated and transmitted to the transceiver 100, the transceiver 100 receives the tag identification information and delivers it to the electronic tag reader to recognize it. The predetermined number may be set according to the strength, power consumption, and electronic tag recognition distance of an RF output signal including at least one antenna.

The substrate of the transceiver 100 may be formed on a PCB, and may achieve radio frequency shielding with an interlayer structure for shielding between channels. The first layer region, which is the surface on which the tag is placed, and the uppermost surface, may include a system ground line. The second layer region immediately below the first layer region may include a signal line or a system ground line. The third layer region, which is directly below the third layer, may include a signal line and a power supply, and the bottom layer, which is just below the third layer region, may include a system ground, an RF ground, and an RF signal line.

Such a shielding structure is for shielding between channels that read different tags, and the structure between layers is not limited thereto and can be changed. For example, the RF signal and the RF ground line can be placed in the second layer region, the third layer region, that is, the inner layer, and the structure is variable depending on the side where the tag is placed.

However, the RF ground may be provided in the form of a plate on a wide plate on the PCB, but in this case, there may be difficulty in matching antennas, and the wide RF ground may cause performance degradation such as a reduction in the recognition distance of the RF reception. Can be

Meanwhile, in one embodiment of the present invention, the RF signal and the RF ground are connected to the RF switch while the RF ground surrounds the RF signal line so that the tag can be stably recognized only in the activated antenna. Meanwhile, the RF switch may include a relay, a PIN diode, and the like.

In addition, when the double-sided structure on the PCB is shielded by using a shielding agent or other metal-type shielding agent except for the place where the antenna is located, it is possible to solve the problem of reading another tag because it is induced on the signal line, the RF signal and the power line. .

On the other hand, the shape of the container storage space area of the transceiver 100 may be transformed into a circular or polygonal shape depending on the shape of the container. In addition, the shape of the substrate of the transceiver 100 is not limited to a quadrangle, and may be modified into a circular or polygonal shape.

4 is a coupling diagram of an electronic tag recognition apparatus in which a plurality of containers are accommodated according to an embodiment of the present invention.

Referring to FIG. 4, an embodiment of the present invention includes a plurality of containers 300 including an electronic tag, a transceiver 100, a means 400 for supporting a plurality of containers, and a controller 200. It is also. Meanwhile, the control unit 200 may be coupled to the lower part of the transceiver unit 100, and the plurality of containers 300, the control unit 200, and the transceiver unit 100 may be detachably attached to each other.

A plurality of transmit / receive antennas, each located in an area in which the container with the electronic tag is attached, perform wireless communication with the electronic tag through a predetermined number of antennas while controlling the RF switch at high speed. The RF tag outputs and radiates a radio frequency (RF) signal for requesting information from the electronic tag, and the electronic tag receives energy from the radio signal and modulates a part of the radio signal to transmit tag identification information to the transceiver. The predetermined number may be set according to the strength, power consumption, and electronic tag recognition distance of the RF output signal including at least one antenna. Meanwhile, the RF switch may include a relay, a PIN diode, and the like.

The transceiver 100 may receive the tag identification information to obtain the location information for the container 300 located in the corresponding portion. This process continuously performs a wireless communication through a 1: 1 communication by a high-speed controlled RF switch, it is possible to recognize the location information of all the storage space in which the antenna is located.

On the other hand, the shape of the container storage space area of the transceiver 100 may be transformed into a circular or polygonal shape according to the shape of the container (300). In addition, the shape of the substrate of the transceiver 100 is not limited to a quadrangle, and may be modified into a circular or polygonal shape.

5 is a flowchart illustrating an electronic tag recognition method for recognizing location information of a plurality of containers according to an embodiment of the present invention.

Referring to FIG. 5, the present invention relates to a method of recognizing an electronic tag that sequentially recognizes a plurality of containers having an electronic tag attached thereto through an RF switch. The electronic tag may be inserted into or attached to the bottom of the container. It may vary depending on the position of the antenna.

The antenna of the transceiver unit outputs a radio frequency (RF) signal periodically from a predetermined number of antennas through high-speed switching of the RF switch (510). The predetermined number may be set according to the strength, power consumption, and electronic tag recognition distance of the RF output signal including at least one antenna. Meanwhile, the RF switch may include a relay, a PIN diode, and the like.

When the electronic tags of at least one container having the electronic tag attached thereto are located in the antenna receiver, the electronic tag identification information is received from the corresponding electronic tag through a response to a radio frequency (RF) signal (530). A plurality of transmit and receive antennas are positioned for each area in which a container with an electronic tag is stored on a substrate including a PCB. In this case, such antennas may be disposed at predetermined intervals in the area where the antennas are accommodated. Rather, the density may be appropriately adjusted according to the size of the container, the position recognition precision, and the communication range with the electronic tag reader. In addition, the antenna of the corresponding position can be matched 1: 1 by reading only the electronic tag of the corresponding region.

The electronic tag receiving the radio frequency (RF) signal can transmit the tag identification information stored in the tag to the electronic tag reader, and the electronic tag receives the radio signal to receive energy and modulates a part of the radio signal to tag identification information. Can be returned.

Receiving the returned signal to receive the tag identification information, using this to determine the location information that the container exists (550). The location information may include information of a container including a location where the container is not stored or the number of the container, and the location information may be displayed on a display.

One aspect of the present invention may be embodied as computer readable code in a computer readable recording medium. The code and code segments implementing the above program can be easily deduced by a computer programmer in the field. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical disk, and the like. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims or the present invention are provided. It belongs to the scope of rights.

100: Transmitting /
200:
130: RF switch
150: antenna transceiver

Claims (8)

A transmission / reception unit including a plurality of transmission / reception antennas for recognizing an electronic tag, wherein the transmission / reception antenna is respectively located in an area in which the container with the electronic tag is attached, and includes an RF switch connected to the transmission / reception portion of each antenna; And
A control unit controlling a radio frequency (RF) signal for controlling the RF switch control signal to recognize the electronic tag in sequence; Electronic tag recognition device comprising a. The method of claim 1, wherein the transceiver unit
And the number of antennas and the number of electronic tags attached to the container are the same, and recognizes an output of an RF signal or a response to the output in a 1: 1 manner. The method of claim 1, wherein the transceiver unit
Electromagnetic tag recognition apparatus having a shielding agent member having an electromagnetic shielding function, the region excluding the electromagnetic tag corresponding to each antenna through the member to form a radio frequency shielding (RF Sheilding). The method of claim 3, wherein the transceiver unit
The antenna is mounted on the PCB, the PCB is an RFID tag, characterized in that the radio frequency shielding (RF Sheilding) through the interlayer structure. The method of claim 1, wherein the transceiver unit
The antenna is mounted on the PCB, the antenna is an electronic tag recognition device characterized in that the shielding using a shielding agent or other metal shielding in the remaining portion except the position. The method of claim 1,
And a display unit for displaying the container information including the number of the container or the positional information in which the container is not stored. The method of claim 1, wherein the RF switch
Electronic tag recognition device comprising a relay or a PIN diode. Periodically outputting a radio frequency (RF) signal using an RF switch to sequentially recognize the electronic tag;
Receiving tag identification information of the electronic tag in response to an output of the radio frequency (RF) signal when electronic tags of at least one container having an electronic tag attached thereto are located in a recognition area;
Determining location information on the container through the received tag identification information; Electronic tag recognition method comprising a.
KR1020120044922A 2012-04-27 2012-04-27 Apparatus and method for recognizing radio frequency identification tag KR20130121584A (en)

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