KR100630898B1 - Radio Frequency Identity Tag for reducing the power consumption - Google Patents

Abstract

According to the present invention, in the RFID ID tag (RF ID Tag), the vibration sensor for detecting the vibration of the RFID tag; A vibration signal generator for outputting the vibration sensed by the vibration sensor as a vibration signal; A vibration discriminating unit for outputting a moving discrimination signal for determining a movement of an RFID ID tag user according to an output waveform of the vibration signal output from the vibration signal generating unit; And a control unit for supplying power to the RF circuit from the power supply unit by the moving discrimination signal output from the vibration discrimination unit.

RF ID Tag, RF ID Tag, ID Card, Vibration Sensor, Vibration Signal

Description

Radio Frequency Identity Tag for reducing the power consumption}

1 is a block diagram schematically showing a conventional RFID ID tag;

2 is a block diagram showing a power saving RFID ID tag according to a preferred embodiment of the present invention;

3 is a configuration diagram illustrating a vibration sensor unit and a vibration signal generator in the power saving RF ID tag of FIG. 2;

4 is a waveform diagram illustrating an output of the vibration signal generator of FIG. 3;

5 is a schematic diagram schematically showing a control system to which the power saving RFID ID tag of FIG. 2 is applied; And

FIG. 6 is a block diagram schematically illustrating a control system to which the power saving RFID ID tag of FIG. 2 is applied.

* Explanation of symbols for main parts of the drawings

110: power supply 120A: vibration sensor

120B: vibration signal generator 121: body

122: tab 123: lead wire

124: moving body 130: vibration discriminating unit

140: RF circuit unit 150: antenna

160: operation mode selection button unit 162: correction button

164: transmission button 170: control unit

The present invention relates to an RFID ID tag, and more particularly, to an energy-saving RFID ID tag for enabling the RF circuit to operate in a transmission / reception mode only when the RFID ID tag user detects a movement.

In general, RF ID Tag (hereinafter referred to as 'RF ID Tag') transmits and receives information wirelessly using frequency.It is already widely used in transportation cards such as subways, buses, etc. Also called Smart Tag or Smart Label. The RF ID tag has an advantage of rapidly processing information wirelessly compared to a bar code system for storing information in a line-shaped image, and technology has been developed to the extent that information can be immediately read wirelessly within a certain distance. In addition, the R / W (Read / Write) terminal processes the information at a speed of 100 ms or less, so the RF ID tag user does not need to stop and wait for information processing of the RF ID tag. It can be miniaturized so that it can be read even when the RF ID tag is carried in a wallet, bag, or pocket.

In this regard, the conventional RF ID tag will be described with reference to the accompanying drawings as follows.

1 is a block diagram schematically illustrating a conventional RF ID tag.

As shown in FIG. 1, in the conventional RF ID tag, after the operating power is induced from the power supply unit 10 and the RF circuit 20 is operated in a reception mode, the RF ID tag is provided to an R / W terminal (not shown). When the frequency of the high frequency band transmitted from the R / W terminal is received by the antenna 30 is approached to transmit the various information to the R / W terminal by the program of the central control unit 40.

However, in the conventional RF ID tag, since the RF circuit 20 is always in the reception mode, the power consumption is large, which causes a problem of frequently replacing the battery. In addition, since there is no operation mode selection conversion function of the RF ID tag, for example, it is difficult to arbitrarily modify data such as personal information or password once stored, and thus it is difficult to recycle the RF ID tag. There is a problem in that a tag cannot use various service functions such as opening and closing of the front door in a situation where it is not easy to transmit / receive a frequency of a high frequency band with an R / W terminal.

Accordingly, an object of the present invention is to detect the RF ID tag user's movement to operate the RF circuit unit in the transmission and reception mode only when the space or position movement state is not a weak movement power saving RF ID that can prevent unnecessary power consumption To provide a tag.

In addition, another object of the present invention is to provide an energy-saving RF ID tag that can easily change the operation mode of the RF ID tag to modify the information or to transmit the information in an emergency situation.

According to the present invention, in the RFID ID tag (RF ID Tag), the vibration sensor for detecting the vibration of the RFID tag; A vibration signal generator for outputting the vibration sensed by the vibration sensor as a vibration signal; A vibration discriminating unit for outputting a moving discrimination signal for determining a movement of an RFID ID tag user according to an output waveform of the vibration signal output from the vibration signal generating unit; And a control unit for supplying power to the RF circuit from the power supply unit by the moving discrimination signal output from the vibration discrimination unit.

In the present invention, the vibration sensor unit, the body portion of the conductor having a hollow shape in which both ends are open; Tabs of a conductor coupled to both ends of the body portion; A lead wire extending through the tab from an outer end to an inner end of the tab; And a movable body of a conductor freely movable in the space formed by the body portion and the tab.

In the present invention, the vibration signal generating unit, the lead wires are respectively grounded, a capacitor is connected between the body portion and the vibration discriminating portion, a first resistor is connected between the body portion and the power supply, the power supply unit It is preferable that a second resistor is connected between and the vibration discriminating unit.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

2 is a block diagram illustrating a power saving RF ID tag according to a preferred embodiment of the present invention.

Hereinafter, the configuration of the present invention according to a preferred embodiment with reference to the accompanying drawings will be described in detail.

As shown in Figure 2, the power saving RF ID tag 100 according to a preferred embodiment of the present invention, the power supply 110 for supplying the operating power of the RF ID tag 100, RF ID tag 100 Vibration sensor unit 120A for detecting a user's movement wearing the vibration, vibration signal generator 120B for outputting the vibration sensed by the vibration sensor unit 120A as a vibration signal, vibration signal generator 120B Receiving a vibration signal output from the vibration determination unit 130 for determining whether the user moves the space or position, the RF circuit unit 140 that is converted to the transmission and reception mode when outputting the result signal from the vibration determination unit 130, Operation mode of the RF ID tag 100 and the antenna 150 for transmitting and receiving the frequency of the high frequency band with the adjacent R / W terminal 200 (refer to FIGS. 4 and 5) when the operation mode of the RF circuit unit 140 is in a transmission / reception state. Equipped with a function key to change the It is electrically connected to the operation mode selection button unit 160 and the components, and has a memory (not shown) and a central control unit (not shown) in which a program for performing the overall operation of the RF ID tag 100 is stored. It consists of one control unit 170.

3 is a configuration diagram illustrating a vibration sensor unit and a vibration signal generator in the power saving RF ID tag of FIG. 2, and FIG. 4 is a waveform diagram illustrating an output of the vibration signal generator of FIG. 3.

As shown in FIG. 3, the vibration sensor unit 120A includes a hollow body-shaped body 121 having both ends open, tabs 122 and tabs 122 coupled to both ends of the body 121. And a lead wire 123 extending through the tab 122 from an outer end portion to an inner end portion thereof, and a movable body 124 freely movable in the space formed by the body portion 121 and the tab 122. Here, the body 121, the lead wire 123 and the moving body 124 is preferably a conductor.

The vibration signal generating unit 120B is electrically connected to the power supply unit 110 and the vibration discriminating unit 130. The lead wires 123 of the vibration sensor unit 120A are grounded, respectively, and the body unit 121 and the vibration unit. The capacitor C is disposed in the conductive line connecting the determination unit 130. A resistor R1 connected to the Vcc terminal of the power supply 110 is disposed in the conductive line connecting the body 121 and the capacitor C. A resistor R2 branched to the V terminal of the power supply unit 110 is disposed in the conductive line connecting the capacitor C and the vibration discriminator 130.

In addition, the vibration signal generator 120B is powered when the moving body 124 contacts the tab 122 so that the body 121 and the lead wire 123 conduct (this state is referred to as 'switch on'). The voltage Vcc of the supply unit 110 flows to the ground through the resistor R1 and the vibration sensor unit 120A, and the voltage V is instantaneously charged through the resistor R2 to the capacitor C so that the output of the vibration signal generator 120B is low. Becomes When the capacitor C is fully charged, since the current can no longer flow, the output of the vibration signal generator 120B becomes high. Depending on the capacity of the capacitor C, the output of the vibration signal generator 120B instantaneously falls to a low level and maintains a high state again. When the conduction state is maintained, the output of the vibration signal generating unit 120B is also kept high, and the moving body 124 is moved so that the body part 121 and the lead wire 123 are spaced apart (this state is 'switched' The voltage Vcc is charged to the capacitor C without flowing to the ground through the resistor R1, and the voltage V continues to output a high signal to the vibration signal generator 120B. When the switch is in the 'switched on' state, the output of the vibration signal generator 120B instantly falls low by the above-described operation, and maintains the high state again. That is, the moment the state of the switch is changed, the output of the vibration signal generator 120B falls from high to low, so the output of the vibration signal generator 120B outputs a falling edge from the high to low vibration sensor unit The vibration signal is generated with respect to the vibration of 120A.

Therefore, when the user carrying the RF ID tag 100 moves a space or a position, the vibration signal generator 120B generates a waveform in which the high and low signal frequencies of the vibration signal such as section A are continuous as shown in FIG. 4. When the user carrying the RF ID tag 100 does not move the space or the position, as shown in FIG. 4, the high and low signal frequencies of the vibration signal such as the B section are discontinuous or only the low signal frequency is generated. Outputs the waveform.

The vibration discriminating unit 130 receives the output waveform generated from the vibration signal generating unit 120B, that is, the vibration frequency of the vibration sensor unit 120A, the change in the frequency, and the change time thereof, as shown in FIG. 4. When a waveform having a continuous high and low signal frequency is input, a moving discrimination signal is generated to determine whether a user having the RF ID tag 100 is in a moving section (section A), and the high and low vibration signal is generated. When the signal frequency is discontinuously input or only a low signal is input, a static shift signal for generating a user having the RF ID tag 100 in a static section (B section) is generated.

On the other hand, the operation mode selection button unit 160 is to enable the selective conversion of the operation mode of the RF ID tag 100 arbitrarily, for example, personal image data, password stored in the storage device of the RF ID tag 100 And converting the operation mode of the RF ID tag 100 into a modification mode when modifying information such as system control data to allow modification of the information through encryption communication with the R / W terminal, thereby recycling the RF ID tag 100. To increase the height and to arbitrarily modify the information to modify the operation of the urgent situation or RF ID tag 100 or vibration sensor unit 120A, vibration signal generating unit 120B and vibration discriminating unit 130 Transmitting the operation mode of the RF ID tag 100 so that the information is transmitted to the R / W terminal in a special situation such as a situation where the user's location or space movement is not recognized by the user. And a transmission button 164 for facilitating transmission of information and the like.

Hereinafter, the operation and effects of the power saving RF ID tag according to the preferred embodiment of the present invention having the above configuration will be described in more detail.

5 is a schematic diagram schematically illustrating a control system to which the power saving RF ID tag of FIG. 2 is applied, and FIG. 6 is a block diagram schematically illustrating the control system to which the power saving RF ID tag of FIG. 2 is applied.

As shown in FIG. 5 and FIG. 6, when a user carrying the RF ID tag 100 approaches the door of a company or a home, the moving body of the vibration sensor unit 120A is moved due to the movement of the user. 124 is in contact with the tab 122 of the body portion 121 and the lead wire 123 and the body portion 121 is electrically connected by the moving body 124 to determine the vibration from the vibration signal generating unit 120B The high signal is input to the unit 130. In this state, when the vibration is generated again and the moving body 124 moves, the electrical conduction state is released between the lead wire 123 and the body portion 121, and the vibration signal generating unit 120B is moved from the vibration determining unit 130B to the vibration discriminating unit 130. (High) signal is input, the vibration discriminating unit 130 determines whether the vibration through the continuous switching of the high signal and the low signal to recognize the user's position or spatial movement state (A section of Fig. 4) The movement discrimination signal is generated.

Therefore, power required for the operation of the RF ID tag 100 is supplied from the power supply unit 110 only when the vibration determination result signal from the vibration discrimination unit 130 is a movement discrimination signal.

Subsequently, when the moving discrimination signal is output from the vibration discrimination unit 130, the operation mode of the RF circuit unit 140 is converted into a reception mode by the control unit 170 and the R / W terminal 210 installed at the entrance of a company or a home. A frequency of the high frequency band transmitted from the antenna 150 is received.

Subsequently, the controller 170 operates the RF circuit unit 140 in a transmission mode, and then, through the antenna 150, the controller 170 performs a high frequency band including information such as personal identification data, a password, and system control data stored in a memory (not shown). The frequency is transmitted to the R / W terminal 210.

Therefore, the R / W terminal 210 receives the frequency of the high frequency band transmitted by the control unit 170 and compares it with the access permission data registered in the database of the central computer 200, and if the reading result is justified, The door is opened and closed by transmitting an electrical signal for opening and closing the doorway to the door opening and closing system 310 electrically connected to the W terminal 210.

Here, the R / W terminal 210 is configured to enable wireless communication with the RF ID tag 100 while forming an aerial high frequency electromagnetic field for wireless communication through an antenna device. In addition, it is preferable to be configured to collect information of the RF ID tag 100 simultaneously in the entire space of the company or home using a plurality of antenna devices, for example, the lighting control system 320 and air conditioning In connection with the control system 330 or the like, the brightness of the corresponding lighting and the operating temperature of the heating / cooling device may be adjusted according to the information stored in the RF ID tag 100.

As described above, the power-saving RF ID tag 100 according to the preferred embodiment of the present invention, the vibration sensor unit 120A, the vibration signal generator 120B and the movement of the user holding the RF ID tag 100 and The RF ID tag 100 is supplied by supplying power so that the RF circuit unit 140 operates in a transmission / reception mode only when the user moves space through the vibration discriminator 130 (when the moving discrimination signal is generated in the A section). The RF ID tag 100 may wirelessly communicate with the R / W terminal 210 only when the user's location or space moves, thereby preventing unnecessary power consumption.

That is, when the user of the RF ID tag 100 does not move (when the B section where the static discrimination signal is generated), the RF communication is temporarily stopped, thereby reducing power consumption for continuous RF communication. .

In addition, when modifying information such as personal identification data, passwords, and system control data stored in the RF ID tag 100, the RF ID tag 100 is in a modification mode through the modification button 162 of the operation mode selection button unit 160. It can operate to modify the information through the encrypted communication with the R / W terminal 210 can increase the degree of recycling of the RF ID tag (100). In addition, in a situation in which the user's position or space movement is not recognized by the vibration sensor unit 120A, the vibration signal generator 120B, and the vibration discriminator 130 or in an urgent situation, for example, the brightness of the lighting or the air conditioner When controlling the indoor temperature to the appropriate temperature by controlling the control system setting data can be sent to the R / W terminal 210 through the transmission button 162 of the operation mode selection button unit 160 to adjust the brightness of the lighting or The room temperature can be optimized.

In the present invention described above, a preferred embodiment has been described, but various modifications can be made without departing from the scope of the present invention. Thus, the scope of the invention should not be defined by the described embodiments, but should be defined by the equivalents of the claims and claims.

As described above, according to the present invention, power required for the operation of the RF ID tag is supplied only when the user moves or moves space of the user having the RF ID tag, thereby reducing unnecessary power consumption.                     

In addition, by arbitrarily changing the operation mode of the RF ID tag, it is possible to modify the information or forcibly send the information in case of emergency, thereby increasing the recyclability of the RF ID tag and adjusting the brightness of the lighting or optimizing the room temperature. Enable service use.

Claims (3)

In the power saving type ID tag including a power supply unit, a vibration sensor unit for detecting vibration, a vibration signal generator for outputting a vibration signal for vibration, a vibration signal discrimination unit for determining the vibration signal, and a control unit, The vibration discriminator outputs a moving discrimination signal when the high and low signal frequencies of the vibration signal are continuously generated, and outputs a static discrimination signal when the high and low signal frequencies of the vibration signal are discontinuously generated or generated as a low signal. , The control unit is a power-saving RFID ID tag characterized in that the power is supplied to the RF circuit from the power supply unit when the movement discrimination signal is generated. According to claim 1, wherein the vibration sensor unit, A body portion of the conductor having a hollow shape in which both ends are open; Tabs of a conductor coupled to both ends of the body portion; A lead wire extending through the tab from an outer end to an inner end of the tab; And Power saving RF ID tag, characterized in that it comprises a movable body of the conductor freely movable in the space formed by the body portion and the tab. The vibration signal generator of claim 2, Each of the lead wires is grounded, a capacitor is connected between the body part and the vibration discriminating part, a first resistor is connected between the body part and the power supply part, and a second resistor is connected between the power supply part and the vibration discriminating part. Power saving RF ID tag, characterized in that connected.

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