KR101118201B1 - System for RFID - Google Patents

System for RFID Download PDF

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Publication number
KR101118201B1
KR101118201B1 KR1020100000647A KR20100000647A KR101118201B1 KR 101118201 B1 KR101118201 B1 KR 101118201B1 KR 1020100000647 A KR1020100000647 A KR 1020100000647A KR 20100000647 A KR20100000647 A KR 20100000647A KR 101118201 B1 KR101118201 B1 KR 101118201B1
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KR
South Korea
Prior art keywords
power
signal
predetermined
rfid tag
rfid
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KR1020100000647A
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Korean (ko)
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KR20100010043A (en
Inventor
김재형
홍종철
Original Assignee
주식회사 비즈모델라인
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Priority to KR1020100000647A priority Critical patent/KR101118201B1/en
Publication of KR20100010043A publication Critical patent/KR20100010043A/en
Application granted granted Critical
Publication of KR101118201B1 publication Critical patent/KR101118201B1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B5/00Near-field transmission systems, e.g. inductive loop type
    • H04B5/0056Near-field transmission systems, e.g. inductive loop type for use in interrogation, identification or read/write systems
    • H04B5/0062Near-field transmission systems, e.g. inductive loop type for use in interrogation, identification or read/write systems in RFID [Radio Frequency Identification] Systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B5/00Near-field transmission systems, e.g. inductive loop type
    • H04B5/0075Near-field transmission systems, e.g. inductive loop type using inductive coupling
    • H04B5/0081Near-field transmission systems, e.g. inductive loop type using inductive coupling with antenna coils
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B5/00Near-field transmission systems, e.g. inductive loop type
    • H04B5/02Near-field transmission systems, e.g. inductive loop type using transceiver

Abstract

The present invention relates to an RF-ID system, wherein an antenna for receiving a predetermined signal from a terminal device or receiving a predetermined power, and charging the received signal or the received power with a predetermined energy source (or a power source) A power shortage module to check the state of charge of the energy source (or power source), and a power shortage test module, and the energy source (or power source) If it is insufficient, a passive RFID tag having a signal transmitting module for transmitting a power shortage signal to a predetermined terminal device, a receiving module for receiving a power shortage signal transmitted by the passive RFID tag, and a passive RFID for transmitting the power shortage signal It includes a terminal device having a power supply module for transmitting a predetermined signal to the tag, or supplies a predetermined power.

Description

Wireless recognition system {System for RFID}

The present invention provides an antenna for receiving a predetermined signal from a terminal device or receiving a predetermined power, a power charging module for charging the received signal or the supplied power with a predetermined energy source (or a power source), and the power supply. Insufficient power supply module for checking the state of charge of the energy source (or power source) in conjunction with the charging module, and if the energy source (or power source) is insufficient, as a result of the check of the power supply shortage module, to a predetermined terminal device Transmits a predetermined signal to a passive RFID tag including a signal transmitting module for transmitting a power shortage signal, a receiving module for receiving a power shortage signal transmitted by the passive RFID tag, and a passive RFID tag for transmitting the power shortage signal; Or a terminal device having a power supply module for supplying predetermined power.

RFID stores predetermined tag information including product information (e.g., electronic product code (EPC)) in a tag attached to a product, and the predetermined RFID reader reads the information through an antenna. , A generic term for an apparatus and / or system for reading and processing the tag information in connection with a predetermined information system and / or a wired / wireless network based on information and communication technology to provide a predetermined additional service, depending on whether a battery is installed or not. It is divided into passive RFID tag and active RFID tag.

The passive RFID tag is an RFID tag without a battery, and has a transponder function for transmitting a predetermined response signal corresponding to the signal in response to a predetermined signal provided from a predetermined terminal device through a radio frequency signal. It is characterized in that it is performed, consisting of only a predetermined electronic circuit for performing the antenna and the transponder function has the advantage of low production cost.

On the other hand, an active RFID tag is an RFID tag in which a battery is embedded, and has a function of transmitting a predetermined signal to the outside by its own battery in addition to the transponder function of the passive RFID tag. As a result, the active RFID tag has an advantage of being used in an RFID system having a hierarchical structure or used in a ubiquitious sensor network (USN) system, but it is more expensive to manufacture than the passive RFID tag, and is bulky for battery construction. When the battery life is over, the active RFID tag loses its function.

The present invention provides an antenna for receiving a predetermined signal from a terminal device or receiving a predetermined power, a power charging module for charging the received signal or the supplied power with a predetermined energy source (or a power source), and the power supply. Insufficient power supply module for checking the state of charge of the energy source (or power source) in conjunction with the charging module, and if the energy source (or power source) is insufficient, as a result of the check of the power supply shortage module, to a predetermined terminal device Transmits a predetermined signal to a passive RFID tag including a signal transmitting module for transmitting a power shortage signal, a receiving module for receiving a power shortage signal transmitted by the passive RFID tag, and a passive RFID tag for transmitting the power shortage signal; In another aspect, the present invention provides an RFID system including a terminal device having a power supply module for supplying predetermined power.

RF ID system according to the present invention, a power source for receiving a predetermined signal from the terminal device, or a predetermined power source, the antenna and a power supply for charging the received signal or the supplied power to a predetermined energy source (or power). Insufficient power supply module for checking the state of charge of the energy source (or power) in conjunction with a charging module, the power supply charging module, and when the result of the power shortage test module, the energy source (or power) is insufficient A passive RFID tag including a signal transmitting module for transmitting a power shortage signal to a predetermined terminal device, a receiving module for receiving a power shortage signal transmitted by the passive RFID tag, and a passive RFID tag for transmitting the power shortage signal. It includes a terminal device having a power supply module for transmitting a predetermined signal or supply a predetermined power.

According to the present invention, the terminal device further includes a signal transmitting module for transmitting a predetermined signal for supplying power to at least one passive RFID tag located at a predetermined time interval.

According to the present invention, a signal transmitted from a terminal device through an antenna present in a passive RFID tag is charged and stored as an energy source (or a power source) for tag operation, and the passive RFID tag is activated by using the stored energy. There is an advantage to use.

According to the present invention, in a hierarchical RFID system, a passive RFID tag having a power charging function is used as an active RFID tag without using an active RFID tag, and thus it is inexpensively used.

1 is a view showing a preferred functional configuration of a terminal device for utilizing a passive RFID tag as an active RFID tag according to an embodiment of the present invention.
2 is a view showing a preferred functional configuration of a terminal device for utilizing a passive RFID tag as an active RFID tag according to another embodiment of the present invention.
3 is a diagram illustrating a functional configuration of an RFID tag utilizing a passive RFID tag as an active RFID tag according to a preferred embodiment of the present invention.
4 is a simplified circuit diagram of a power shortage inspection module according to a preferred embodiment of the present invention.
5 is a diagram illustrating an RFID system having a hierarchical structure according to a preferred embodiment of the present invention.
6 is a diagram illustrating a method of operating a terminal device according to an embodiment of the present invention.
7 is a diagram illustrating a method of operating an RFID tag according to an exemplary embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings and description will be described in detail the operating principle of the preferred embodiment of the present invention. However, the drawings and the following description shown below are for the preferred method among various methods for effectively explaining the features of the present invention, the present invention is not limited only to the drawings and description below. 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, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or custom. Therefore, the definition should be based on the contents throughout the present title.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. The configuration is omitted as much as possible, and a functional configuration that should be additionally provided for the present invention is mainly described. Those skilled in the art will readily understand the functions of components that have been used in the prior art among the functional configurations that are not shown in the following description, The relationship between the elements and the components added for the present invention will also be clearly understood.

In addition, the preferred embodiment of the present invention to be carried out in the following case, the RFID reader to perform the function and role of the terminal device in the RFID system to efficiently describe the technical components constituting the present invention, the RFID terminal is the terminal device Although the functions and roles of the respective embodiments will be illustrated and described, the claims of the present invention are not limited thereto, and in some cases, the functional configuration of the present invention may be configured separately from the RFID reader and the RFID terminal. will be.

As a result, the technical spirit of the present invention is determined by the claims, and the following examples are one means for efficiently explaining the technical spirit of the present invention to those skilled in the art to which the present invention pertains. It is only.

1 is a view showing a preferred functional configuration of a terminal device for utilizing the passive RFID tag 100 as an active RFID tag 100 according to an embodiment of the present invention.

In more detail, FIG. 1 illustrates a case in which an RFID reader 105 performs a function and a role of a terminal device for utilizing a passive RFID tag 100 as an active RFID tag 100 on an RFID system. If the person skilled in the art, a part of the functional configuration provided in the RFID reader 105 of FIG. 1 is provided in the RFID terminal 200, or the RFID reader 105 to the RFID terminal 200 It will be clearly understood that the program is recorded on a predetermined recording medium provided in the present invention.

The RFID reader 105 that utilizes the passive RFID tag 100 as the active RFID tag 100 includes an electronic circuit for transmitting or receiving a radio wave (or radio frequency signal) toward the RFID tag 100, and the electronic device. An antenna for transmitting and / or receiving a radio wave of a specific frequency to the RFID tag 100 in conjunction with a circuit, and at least one signal transmitted and received with the RFID tag 100 via the radio frequency signal to a predetermined RFID terminal ( It comprises an interface for interfacing with the 200, this Figure 1 is for explaining a preferred functional configuration of the RFID reader 105 as described above to those skilled in the art easily.

Referring to FIG. 1, the RFID reader 105 may include an antenna unit 110 that transmits and receives a radio frequency signal of a predetermined frequency band (or supplies an energy source (power) to the RFID tag 100), An interface unit 125 for interfacing predetermined information or data with a predetermined RFID terminal 200, and converts predetermined information or data provided from the RIFD terminal through the interface unit 125 into a radio frequency signal, The signal transmitting module 120 transmitted through the antenna unit 110 and the radio frequency signal received through the antenna unit 110 are converted into a predetermined digital signal to the RFID terminal 200 through the interface unit 125. It comprises a receiving module 115 and a power supply module 130 for supplying a predetermined power required to operate the RFID reader 105 to provide.

The antenna unit 110 transmits a radio frequency transmitted from the RFID reader 105 when a predetermined RFID tag 100 enters (or approaches a radio frequency region) around the RFID reader 105. A predetermined radio frequency signal that is transmitted to the RFID tag 100 by a signal transmitting module 120 and / or sends a signal including a predetermined activation signal and / or information (or data) through the signal And / or receive a predetermined radio frequency signal from the RFID tag (100).

The interface unit 125 receives predetermined information or data to be included in a radio frequency signal transmitted from the RFID terminal 200 to the RFID tag 100 through the antenna unit 110, and / or the antenna It performs an interface function for providing the RFID terminal 200 with information or data corresponding to a predetermined digital signal included in the radio frequency signal received from the RFID tag 100 through the unit 110. .

According to an embodiment of the present invention, when the RFID reader 105 interfaces with the RFID terminal 200 as an external type, the interface unit 125 may be a short-range cable communication means (for example, a universal serial bus). ), And / or RS-232c) and / or at least one short-range wireless communication means (eg, RF (Radio Frequency) communication, Bluetooth, Wireless LAN), and another method. For example, when the RFID reader 105 interfaces with the RFID terminal 200 in a built-in type, the interface unit 125 may include a data bus and / or a printed circuit board (PCB) circuit. Do.

The signal transmitting module 120 is a modulator for converting a predetermined radio frequency signal for transmitting a predetermined digital signal to the RFID tag 100 through the antenna unit 110, and the interface unit 125. When predetermined information or data to be provided from the RFID terminal 200 to the RFID tag 100 is provided, or it is determined to transmit a predetermined signal to the RFID tag 100 by an internal logic circuit. The digital signal corresponding to the information or data and / or the digital signal corresponding to the determination result is converted into a predetermined radio frequency signal and transmitted through the antenna unit 110.

According to the present invention, the signal transmission module 120 is a predetermined radio frequency signal for supplying power to at least one passive RFID tag 100 located in the vicinity of the predetermined time interval in addition to the signal transmission function as described above. Characterized in that it further comprises a function for transmitting, wherein the radio frequency signal is an electrostatic using magnetic coupling and / or electrostatic energy to the RFID tag 100 present in the energy field of the antenna unit 110 A predetermined energy source (or power source) is supplied through at least one or more of an electrostatic coupling and / or an inductive coupling method using induction energy.

The receiving module 115 is a demodulator for converting a radio frequency signal received through the antenna unit 110 into a predetermined digital signal, and demodulates a radio frequency signal received through the antenna unit 110. A predetermined digital signal is generated, and predetermined information or data corresponding to the digital signal is provided to the RFID terminal 200 through the interface unit 125.

According to the present invention, the receiving module 115 receives a predetermined power shortage signal from at least one or more tags, and the power shortage signal is previously between the RFID tag 100 and the RFID reader 105. It is characterized by comprising a predetermined analog pattern and / or pulse signal defined.

The power supply module 130 uses the electrostatic coupling and / or induction energy using the magnetic field coupling and / or electrostatic energy while the antenna unit 110 supplies a predetermined power required to operate the RFID reader 105. And an energy field capable of supplying a predetermined energy source (or power source) to the predetermined RFID tag 100 around the RFID reader 105 through at least one of the inductive coupling methods. The RFID tag 100 present in the energy field around the RFID reader 105 is supplied with a predetermined energy source (or power source) by the power supplied by the supply module 130.

2 is a view showing a preferred functional configuration of a terminal device for utilizing the passive RFID tag 100 as an active RFID tag 100 according to another embodiment of the present invention.

In more detail, FIG. 2 illustrates a case in which an RFID terminal 200 performs a function and a role of a terminal device for utilizing the passive RFID tag 100 as an active RFID tag 100 on an RFID system. If the person skilled in the art, a part of the functional configuration provided in the RFID terminal 200 of FIG. 2 is provided in the RFID reader 105, or the RFID reader 105 to the RFID terminal 200 It will be clearly understood that the program is recorded on a predetermined recording medium provided in the present invention.

In FIG. 2, the RFID reader 105 includes an antenna unit 110 which performs a role of transmitting and receiving radio frequency signals of a predetermined frequency band (or supplying an energy source (power) to the RFID tag 100), An interface unit 125 for interfacing predetermined information or data with a predetermined RFID terminal 200, and converts predetermined information or data provided from the RIFD terminal through the interface unit 125 into a radio frequency signal, The RFID terminal 200 through the interface unit 125 by converting the transmitting unit 140 and the radio frequency signal received through the antenna unit 110 into a predetermined digital signal through the antenna unit 110. And a power supply unit 250 for supplying predetermined power required for the RFID reader 105 to operate.

Referring to FIG. 2, the RFID terminal 200 includes a control unit 205 for controlling the overall operation of the RFID terminal 200, a reception module 210 for receiving a predetermined power shortage signal from at least one tag, and a schedule thereof. It includes a signal transmission module 215 for transmitting a predetermined signal for supplying power to at least one passive RFID tag 100 located at a time interval and a timer 220 for checking a predetermined time, Basically, a key input unit 230 and a screen output unit 235 for inputting and outputting at least one information or data used in a process of performing a predetermined function included in the RFID terminal 200, and the external terminal and the RFID terminal 200. Communication unit 240 for performing network-to-network networking, at least one or more information or data necessary to perform a predetermined function provided in the RFID terminal 200 for storing And a power supply unit 250 for supplying predetermined power to the RFID terminal 200, and further including at least one unique functional configuration according to the characteristics of the RFID terminal 200. It is possible to achieve.

The control unit 205 controls the overall operation of the RFID terminal 200, manages the flow of information or data between each component, and includes a hardware (Central Processing Unit) / MPU (Micro Processing Unit) in hardware And at least one processor, an execution memory (for example, a register), a bus for inputting and outputting predetermined data, and at least one electronic circuit (or integrated circuit) therefor, and also software-specific. And a predetermined program routine and / or program data which are loaded from the predetermined recording medium provided in the RFID terminal 200 into the execution memory and processed by the processor. Characterized in that made.

The receiving module 210 receives a predetermined power shortage signal from the at least one RFID tag 100 by the RFID reader 105 and indicates that the corresponding RFID tag 100 is insufficient in power through the interface unit 125. In the case of providing the predetermined information or data to be specified, the information or data is read in association with the control unit 205 (or through a program recorded on the recording medium of the RFID terminal 200). Or a power supply (RFID) tag 100 to be identified.

The signal transmitting module 215 supplies a source of energy (or power) to at least one RFID tag 100 present in an energy field around the RFID reader 105 through a timer 220 for checking a predetermined time. When it reaches to reach the energy source (or power) supply cycle as a result of the determination, the predetermined power for supplying power to at least one passive RFID tag 100 located in the vicinity through the RFID reader 105 It is characterized by sending a signal of.

According to another exemplary embodiment of the present invention, the receiving module 210, the signal transmitting module 215, and the timer 220 are recorded on a recording medium provided in the RFID terminal 200 as a computer readable program. It is possible.

3 is a diagram illustrating a functional configuration of an RFID tag 100 utilizing the passive RFID tag 100 as an active RFID tag 100 according to a preferred embodiment of the present invention.

Referring to FIG. 3 according to a preferred embodiment of the present invention, the RFID tag 100 that utilizes the passive RFID tag 100 as the active RFID tag 100 uses an RFID reader 105 and a radio frequency signal of a predetermined frequency band. An antenna unit 310 that transmits and receives (or receives an energy source (power)) and a receiver that converts a radio frequency signal received from the antenna unit 310 into a digital signal and provides the converted signal to the controller 300. 315, a transmitter 320 for converting a digital signal provided from the controller 300 into a predetermined radio frequency signal, and controls the overall function of the RFID tag 100, and receives the received signal through the receiver 315. A control unit 300 and a predetermined predetermined memory to read a digital signal and to generate a digital signal corresponding thereto or to extract predetermined information from the memory unit 305 to control a unique function of the corresponding RFID tag 100. And a memory unit 305 having a storage area for storing predetermined tag information including a pair and / or a storage area for storing tag information transmitted / received from the RFID reader 105. It includes a power supply unit 330 for supplying a predetermined power required to operate the RFID tag 100.

The antenna unit 310 when the RFID tag 100 enters (or is close to the radio frequency region) of the radio frequency field of the predetermined RFID reader 105 provided in the RFID terminal 200. Receiving a signal including a predetermined activation signal and / or information (or data) through a radio frequency signal transmitted from the RFID reader 105 and providing (or applying) the signal to the receiving unit 315, or wirelessly It is characterized in that for transmitting the signal containing a predetermined response signal and / or information (or data) to the RFID reader 105 via a frequency signal.

According to the exemplary embodiment of the present invention, when the RFID reader 105 is a passive type, the antenna unit 310 may include energy (eg, an analog of radio frequency) included in a radio frequency signal transmitted from the RFID reader 105. Signal) to the power supply unit 330 to supply a predetermined energy source (or power source) required for the RFID tag 100 to operate.

The receiver 315 is a demodulator for converting a radio frequency signal provided (or applied) through the antenna unit 310 into a predetermined digital signal, and provided (or applied) through the antenna unit 310. Demodulating the radio frequency signal to generate a digital signal corresponding to the information or data transmitted from the RFID reader 105 to the RFID tag 100 and providing the digital signal to the controller 300.

The transmitter 320 may generate a response signal of a digital signal received through the receiver 315 and / or a digital signal generated or extracted (eg, extracted from the memory unit 305) in the RFID tag 100. Modulator for converting into a predetermined radio frequency signal for transmission to the RFID reader 105 via the antenna unit 310, when a predetermined digital signal is received through the receiver 315 Generates a response signal to generate a radio frequency signal for transmitting to the RFID reader 105 via the antenna unit 310, or generated by the control unit 300, or predetermined from the memory unit 305 It generates a radio frequency signal for transmitting the information or data to the RFID reader 105 via the antenna unit 310, the generated radio frequency signal is The antenna unit 310 is provided to the RFID reader 105.

The control unit 300 controls the overall function of the RFID tag 100, and reads a digital signal received in response to a request of the RFID reader 105 through the receiver 315 to control the digital signal. Perform a function and / or read a predetermined response signal corresponding to the received digital signal, or extract predetermined information or data corresponding to the received digital signal from the memory unit 305, and transmit the It is characterized in that for controlling the generation of a predetermined digital signal to be transmitted to the RFID reader 105 via 320.

According to a preferred embodiment of the present invention, the control unit 300 is a predetermined control logic (for example, logic for extracting predetermined information or data from the memory unit 305) for performing the control function as described above. It is preferable to include a), in the case of the more advanced RFID tag 100, it is possible to include a processor with a predetermined operation function.

The memory unit 305 is capable of reading (or writing) by the control unit 300, information or data for reading a predetermined digital signal received from the RFID reader 105 through the receiving unit 315, And / or predetermined information or data to be provided to the RFID reader 105 in response to the received digital signal, and / or a function and a role of the RFID tag 100 and the controller 300 defines the RFID. A memory structure for storing at least one predetermined information or data required for controlling the tag 100 and / or predetermined information or data for determining validity of the information or data stored in the memory unit 305. It is characterized by comprising.

According to a preferred embodiment of the present invention, the information or data stored in the memory unit 305 is used by the control unit 300 to control the operation of the RFID tag 100, or extracted by the control unit 300 to the It is preferably provided to the RFID reader 105, the information or data is added or updated or changed in the memory unit 305 by the control unit 300 in accordance with the functional configuration of the RFID tag 100 is recorded It is possible.

Referring to FIG. 3, the RFID tag 100 includes a power charging module 335 for charging a signal received by the antenna with a predetermined energy source (or a power source), and the energy source module in conjunction with the power charging module. (Or a power shortage test module 340 for checking the state of charge of the power source and the power shortage check module 340, as a result of the lack of the energy source (or power supply), if the lack of power signal to a predetermined terminal device Characterized in that it comprises a signal transmission module 345 for transmitting.

The power charging module 335 generates a predetermined power corresponding to an energy field around the RFID reader 105 by using an analog signal of a radio frequency provided (or applied) through the antenna unit 310. The power supply unit 330 is charged, and the power charged in the power supply unit 330 is supplied to the receiver 315, the transmitter 320, and the controller 300 provided in the RFID tag 100.

According to the present invention, the method of generating the power by the power charging module 335 is a magnetic coupling using the magnetic field of the alternating current flowing through the coil of the RFID reader 105 and / or electrostatic coupling using the electrostatic energy. Characterized in that the power source energy is generated through at least one or more of the inductive coupling method using inductive energy.

The power shortage inspection module 340 checks the voltage of the power charged in the power supply unit 330 by the power charging module 335, and outputs a predetermined power shortage signal when the power is less than or equal to the reference voltage Vref. It generates and provides to the signal transmission module 345, the description thereof will be described in FIG.

The signal transmission module 345 is an energy source (or power source) charged in the power supply unit 330 by the power charging module 335 when a predetermined power shortage signal is generated by the power shortage inspection module 340. It is characterized in that for transmitting the power supply shortage signal (or power charging request signal corresponding to the power supply shortage signal) to the RFID reader 105 via the antenna unit 310.

According to the present invention, the signal transmission module 345 to actively transmit and receive predetermined information or data with other RFID tags 100 around, such as the active RFID tag 100 in a hierarchical RFID system, And a function of transmitting predetermined information or data stored in the memory to at least one or more peripheral tags by using an energy source (or power source) charged in the power supply unit 330 by the power charging module 335. And / or at least one or more predetermined information or data received by the receiver 315 using an energy source (or power) charged in the power supply unit 330 by the power charging module 335. It is characterized by comprising a function for transmitting to the peripheral tag.

4 is a simplified circuit diagram of a power shortage inspection module 340 according to a preferred embodiment of the present invention.

4 is a simplified circuit diagram of a power shortage test circuit, which generates a predetermined power shortage signal when the power charged in the power supply unit 330 is equal to or less than a predetermined reference voltage. Those skilled in the art may have various forms of power shortage that generate a power shortage signal (or a power charge request signal corresponding to a power shortage signal) including a predetermined power shortage code based on the circuit diagram of FIG. Inspection module 340 may be implemented.

Referring to FIG. 4, the power shortage test circuit is connected to a power supply line of the power supply unit 330, and when the supply voltage Vsupply of the power supply unit 330 is equal to or less than a predetermined reference voltage, a predetermined power shortage signal is output. It generates and provides to the signal transmission module 345, the signal transmission module 345 is characterized in that for transmitting the power shortage signal to the RFID reader 105 via the antenna unit 310.

According to a preferred embodiment of the present invention, the reference voltage is preferably defined as the minimum voltage that can transmit a power shortage signal from the RFID tag 100 to the RFID tag 100.

Hereinafter, an operation method of using the passive RFID tag 100 as the active RFID tag 100 based on the functional configuration of the above-described RFID tag 100 and the RFID reader 105 and / or the RFID terminal 200 will be described. In the following description, the passive RFID tag 100 of the RFID system having a hierarchical structure as shown in FIG. 5 is used as the active RFID tag 100.

5 is a diagram showing an RFID system having a hierarchical structure according to a preferred embodiment of the present invention.

The RFID system having a hierarchical structure includes a first layer RFID tag 100 for directly transmitting and receiving predetermined information or data with the RFID reader 105 and the upper first layer RFID tag 100 as shown in FIG. An RFID system comprising a second layer RFID tag 100 for transmitting and receiving information or data and an N-th layer RFID tag 100 for transmitting and receiving predetermined information or data with a higher layer (N-1) layer RFID tag 100. For example, each RFID tag 100 may be an active tag for transmitting or receiving information or data between the RFID tags 100.

The RFID system of the hierarchical structure as described above is an assembly product (eg, a product distribution box containing at least one or more multiple products to which the RFID tag 100 is attached and / or an assembly product (eg, at least one or more RFID tags 100 attached thereto). , An automobile, a desktop computer), and the like, the active provision of the RFID tag 100 to achieve the hierarchical structure is too costly and inefficient. On the other hand, the RFID tag 100 having the hierarchical structure as described above can be used inexpensively by utilizing the passive RFID tag 100 as the active RFID tag 100 as the present invention suggests. And / or a preferred operation method of the terminal device including the RFID terminal 200 or the RFID tag 100 will be described with reference to FIGS. 6 to 7.

6 is a diagram illustrating a method of operating a terminal device according to an embodiment of the present invention.

In more detail, FIG. 6 illustrates a preferred operation method of an RFID reader 105 and / or an RFID terminal 200 corresponding to a terminal device in an RFID system having a hierarchical structure as shown in FIG. 5. Those skilled in the art will be able to easily infer various applications using the passive RFID tag 100 as the active RFID tag 100 based on this drawing.

Referring to FIG. 6, a terminal device (eg, an RFID reader 105 and / or an RFID terminal 200) in a hierarchical structure may provide predetermined information or data with respect to an RFID tag 100 having a hierarchical structure. Switching to the mode to deliver (600), and provides the RFID service for transmitting and receiving the predetermined information or data from the terminal device to at least one RFID tag 100 existing in the hierarchical RFID system (605), While the RFID service is provided, the terminal device determines whether a cycle for supplying power to at least one RFID tag 100 of the hierarchical RFID tag 100 is reached through a timer (610).

If it is determined that the power supply cycle is reached (615), the terminal device transmits a radio frequency signal to the RFID tag 100 of the hierarchical structure and switches to a power supply mode for supplying power (630).

On the other hand, if the determination result does not reach the power supply cycle (615), the terminal device determines whether a predetermined power shortage signal is received from the hierarchical RFID tag 100 (620), and if the determination result If a predetermined power shortage signal is received (625), the terminal device transmits a radio frequency signal to the RFID tag 100 of the hierarchical structure and switches to a power supply mode for supplying power (630). On the other hand, if the power shortage signal is not received as a result of the determination (625), the terminal device transmits and receives predetermined information or data to the RFID tag 100 of the hierarchical structure in the information or data transfer mode to provide an RFID service. Repeat 605.

When the terminal device is switched to a predetermined power supply mode for supplying power to the RFID tag 100 through the above process (630), the terminal device has a hierarchical structure through the RFID reader 105. The RFID tag 100 (or the RFID tag 100 that transmits a power shortage signal) transmits a radio frequency signal for power supply to charge a predetermined energy source (or power source) for operating the RFID tag 100. (635).

While the power charging is in progress, the terminal device determines whether to switch to the information or data transfer mode (640), if the terminal device does not switch to the information or data transfer mode, the power supply as described above Sufficient power is charged to the RFID tag 100 by maintaining the mode. On the other hand, if the terminal device needs to be switched to the information or data transfer mode (for example, if an event occurs in which predetermined tag information needs to be extracted from the RFID tag 100) (645), the terminal device may provide information or information in the power supply mode. Switching to the data transfer mode, the process of charging power to the RFID tag 100 while switching the information or data transfer mode and the power supply mode as described above until the hierarchical RFID service is terminated (650) It is preferable to repeat.

7 is a diagram illustrating a method of operating the RFID tag 100 according to an exemplary embodiment of the present invention.

In more detail, Figure 7 relates to a preferred operating method of the passive RFID tag 100 that is actively used through power charging in the RFID system having a hierarchical structure as shown in Figure 5, the present invention belongs to Persons having ordinary skill in the art will be able to easily infer various application methods utilizing the passive RFID tag 100 as the active RFID tag 100 based on this drawing.

Referring to FIG. 7, the passive RFID tag 100 is pre-charged with a power supply capable of transmitting a predetermined signal on its own, and even when the passive RFID tag 100 is not charged, the passive RFID tag 100 is fixed by the periodic charging function of the terminal device as shown in FIG. 6. Automatic charging after time elapses.

The RFID tag 100 charged with power for the tag operation as described above determines whether to transmit a predetermined signal to the peripheral RFID tag 100 to operate as the hierarchical RFID tag 100 (700). As a result of the determination, when transmitting a predetermined signal to the neighboring RFID tag 100 (705), the predetermined transmission information or data is extracted from the memory unit 305 using the charged power (710), and the extraction is performed. The converted information or data is converted into a radio frequency signal and transmitted to the surrounding RFID tag 100 using the charged power (operation 715). On the contrary, when the determination result does not transmit a predetermined signal to the neighboring RFID tag 100 (705), the RFID tag 100 determines whether a predetermined signal is received from the neighboring RFID tag 100 (720). If a predetermined signal is received from the neighboring RFID tag 100 (725), it is determined whether to retransmit the signal to another RFID tag 100 nearby (730). In case of resending (735), the RFID tag 100 transmits the received signal to the surrounding RFID tag 100 using the charged power (715).

As described above, a predetermined signal is transmitted (or retransmitted) to the surrounding RFID tag 100 using the power charged in the RFID tag 100 (715), and / or the RFID around the RFID tag 100 is provided. If a predetermined signal is not received from the tag 100 (725), and / or a predetermined signal is received but not resent (735), the RFID tag 100 performs a power shortage check for the tag operation. (745).

If the power shortage test results that the power for the tag operation is not short (750), the RFID tag 100 repeats the above-described process (700 ~ 745), while the power for the tag operation is insufficient In case (750), the RFID tag 100 transmits a predetermined power shortage signal to the RFID reader 105 (755), and the RFID tag 100 causes the RFID reader 105 by the power shortage signal. Will charge the insufficient power.

According to FIG. 7, the RFID tag 100 does not transmit a predetermined signal to the neighboring RIFD tag or receives a predetermined signal from the neighboring RFID tag 100 and does not retransmit it, but operates the corresponding RFID tag 100. If the power supply for the lack of power supply to the terminal lacking power signal to automatically charge the insufficient power.

100: RFID tag 105: RFID reader
115: receiving module 120: signal sending module
130: power supply module 200: RFID terminal
210: receiving module 215: signal transmitting module
335: power charging module 340: power shortage inspection module
345: signal transmission module

Claims (2)

  1. In the radio recognition system comprising a passive radio identification tag and a terminal device,
    An antenna for periodically receiving a radio frequency signal, a power charging module for converting the received radio frequency signal into an operating power source and maintaining it for a predetermined time, and inspecting the operating power source to convert the passive radio tag into an active radio tag Passive wireless recognition tag having a power shortage inspection module for checking whether the operating power for operation is insufficient and the signal transmission module for transmitting a power shortage signal when the operating power for operating the passive wireless identification tag is insufficient. ; And
    A terminal having a signal transmission module for periodically transmitting a radio frequency signal for supplying operation power to a passive wireless identification tag according to a predetermined power supply cycle, and a receiving module for receiving a power shortage signal from at least one passive wireless identification tag. Wireless recognition system comprising a.
  2. The method of claim 1, wherein the terminal device,
    And a signal transmitting module for transmitting a radio frequency signal for supplying the insufficient operating power to the passive radio tag when the power shortage signal is received after transmitting the radio frequency signal and before reaching a next power supply cycle. Wireless recognition system, characterized in that.
KR1020100000647A 2010-01-05 2010-01-05 System for RFID KR101118201B1 (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040028312A (en) * 2002-09-30 2004-04-03 한국과학기술원 Contactless battery charging system using induction coupling method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040028312A (en) * 2002-09-30 2004-04-03 한국과학기술원 Contactless battery charging system using induction coupling method

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