KR20090061551A - Rfid tag apparatus for preventing illegal wiring - Google Patents

Abstract

A RFID tag apparatus for managing power distribution facilities is provided to recognize the illegal wiring depending on whether a lead wire is cut. A main body(100) includes an antenna pattern. Appurtenances(200) include an RFID chip(210). The RFID chip is separated from the antenna pattern equipped in the main body. A main connector(300) of the flexible material is banded on at least one wire. A lead wire(310) is connected between the antenna pattern and RFID chip. When the lead wire is cut, the signal response to an RFID reader is interrupted. Therefore, whether the illegal wiring exists is recognized.

Description

RDF tag apparatus for distribution facility management to prevent illegal wiring

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an RFID tag device for power distribution facility management that prevents illegal wiring, and more particularly, to a technology for managing power distribution facilities by storing information about power distribution facilities in an RFID chip.

RFID technology that installs band-type RFID tags in wiring of many cables installed in electric poles and stores distribution facility information such as installation time, replenishment time, and installer in RFID chip of RFID tag, and manages distribution facility The power distribution equipment techniques used have been proposed.

Among these techniques, a technique for preventing illegal wiring has been proposed in Published Patent Nos. 2006-32531 (April 17, 2006) and Published Patent No. 2006-114199 (Nov. 06, 2006). The technique proposed in Korean Patent Laid-Open No. 2006-32531 is a technique for recognizing illegal wiring using a piezoelectric element, and the technique proposed in Korean Patent Laid-Open No. 2006-114199 is determined by whether a band-shaped RFID tag is cut or not. It is a technology to recognize illegal wiring.

The present inventors have been researching a technology that can recognize illegal wiring more efficiently by improving the conventional methods as described above.

The present invention has been invented under the above-mentioned purpose, and forms a lead wire between the antenna and the RFID chip which are separately configured, and prevents the illegal wiring which makes it possible to recognize the illegal wiring according to whether the lead wire is cut or not. It is an object to provide a device.

According to an aspect of the present invention for achieving the above object, the present invention implements an RFID chip to be spaced apart from the antenna pattern, and forms a lead wire between the antenna pattern and the RFID chip, the signal to the RFID reader when cutting the lead wire The response is interrupted so that it is possible to know whether the wiring is illegal.

According to the present invention, a lead wire is formed between the separated antenna and the RFID chip to recognize whether the wire is illegal or not depending on whether the lead wire is cut. However, only the lead wire is bent on the wire to prevent the antenna pattern from being bent, thereby preventing degradation of antenna characteristics. It has a useful effect.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce.

1 is a view showing an embodiment of an RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention.

As shown in the figure, the RFID tag device for power distribution facility management to prevent illegal wiring according to this embodiment comprises a main body 100, an accessory 200, and a main connector 300, RFID It can be implemented as a passive (active) operated by a reader (not shown in the figure) or an active (active) operated by its own battery.

The main body 100 is provided with an antenna 110 pattern.

The accessory 200 is provided with an RFID chip 210 spaced apart from the antenna 110 pattern provided in the main body 100.

The main connector 300 is banded on at least one wire 900, and a lead wire 310 is formed between the antenna 110 pattern and the RFID chip 210 to form an RFID reader. The signal response to (not shown in the drawing) is interrupted so that it is possible to know whether the wiring is illegal, and preferably made of a flexible material.

That is, the RFID tag device for managing power distribution facilities preventing illegal wiring according to the present embodiment is characterized in that the antenna 110 pattern and the RFID chip 210 are spaced apart from each other, and the antenna 110 pattern and the RFID chip 210 are separated from each other. The wires are fixed by bending the main connector 300 having the lead wires 310 connected therebetween to at least one wire 900 installed on a pole or the like to prevent flow.

Meanwhile, a lead wire 310 is formed between the antenna 110 pattern formed in the main body 100 and the RFID chip 210 formed in the accessory body 200 spaced apart from the antenna 110 pattern. Information such as installation time, replenishment time, installer, and the like radiates through the antenna 110.

It is possible to manage the power distribution equipment by detecting the power distribution equipment information radiated through the antenna 110 through a portable RFID reader (not shown) possessed by an administrator.

In this case, when a legal new wiring or illegal wiring is made, wires must be added after cutting the main connector 300 that is bent on the wire 900, and the main connector 300 when the main connector 300 is cut. The lead wire 310 formed at the cut line is also cut so that the wiring facility information stored in the RFID chip 210 is not radiated through the antenna 110.

Therefore, the signal response to the wiring equipment information request of the portable RFID reader (not shown in the drawings) held by the administrator is stopped, so that the administrator can know that the RFID tag device for managing the distribution equipment, which prevents illegal wiring, has been damaged. The wiring can be known.

At this time, the RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention is formed by the main body 100 having the antenna 110 pattern is formed and the accessory body 200 formed with the RFID chip 210 spaced apart from each other. Since the lead wire 310 is formed between the antenna 110 pattern and the RFID chip 210, when the wire is bent, the main body 100 having the antenna 110 pattern is bent so as to be spaced apart from the wire 900. Since the (110) pattern is not affected by the bending, that is, the antenna 110 pattern is not bent due to the bending, thereby deteriorating the antenna characteristic.

The antenna 110 pattern may be implemented in various patterns according to the installation position. For example, when the RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention is installed in a wire installed on a pole, the antenna 110 pattern is an RFID reader (not shown in the drawings) that is held by an administrator located on the ground. The antenna pattern should be designed to emit a radio wave of readable degree.

4 is a diagram illustrating an example of an antenna pattern, in which the antenna is implemented in a plate shape, FIG. 5 is a gain characteristic diagram of the antenna pattern illustrated in FIG. 4, and FIG. 6 is an antenna illustrated in FIG. 4. Smith chart for impedance matching of patterns.

FIG. 7 is a diagram illustrating another example of an antenna pattern, in which the inside of a plate antenna is cut and implemented in a closed shape, and FIG. 8 is a gain characteristic diagram of the antenna pattern shown in FIG. Is a Smith chart for impedance matching of the antenna pattern shown in FIG.

RFID tags vary in antenna characteristics depending on their attachment medium. If the medium is metal, parasitic capacitance will occur and the characteristics of the antenna will be completely changed, except for the metal tag. If the medium is water, the characteristics of the radio waves are absorbed and the characteristics of the antenna change. If the medium is a communication cable, it is rubber on the outside but metal on the inside, which significantly affects the tag.

In the RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention, a lead wire for connecting the antenna 110 pattern and the RFID chip 210 without the antenna 110 pattern directly contacting the wiring 900 ( 310 is in contact with the wiring 900 is less sensitive to the antenna characteristics, and can be made less sensitive to the antenna characteristics if fabricated in consideration of the attachment surface in the design.

If the RFID chip 210 has the impedance Z _chip in the wound state, the impedance impedance of the input impedance Z _line of the lead wire 310 of the antenna 110 and the desired RFID frequency 910-914 MHz band must be impedance matched. A signal from) is transmitted to the antenna 110. For example, the impedance matching equation between the RFID chip 210 and the antenna 110 at 912 MHz may be expressed as Equation (1).

(Equation 1)

The input impedance Z _line and the antenna input impedance with the antenna lead is Z _ant has a relation such as the following (expression 2).

(Equation 2)

In Equation 2, L is the length of the lead wire, and Z _c is the characteristic impedance of the lead wire. Z _c , λ _s, and Z _line change as the lead wire is wound or undetected. For example, Z _c , λ _s are affected by the dielectric constant ε of the environmental medium. If this is expressed as equation (3).

(Equation 3)

In Equation 3, parameters Z ₀ and λ ₀ represent characteristic impedance and wavelength in a vacuum environment. If the RFID tag is made to be equal to λ _s / 2 at 912MH while the length L of the lead wire is wound, the following equation (4) is established by the above equations.

(Equation 4)

Therefore, the lead wire can be implemented in a coaxial line, shielded two-wire line, shielded twisted pair method, etc. so that the parameters Z ₀ and λ ₀ are less affected by the environment. have.

On the other hand, according to an additional aspect of the present invention, the RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention may further include an auxiliary connector (400).

One side of the auxiliary connector 400 is connected to one side of the main connector 300, the other side is detachable with the accessory 200, banding at least one wire (900), flexibility It is preferable that it is a (Flexible) material.

At this time, when bending the wiring 900, the other coupling length of the auxiliary connector 300 coupled to the accessory 200 can be adjusted to fit the wiring circumference to be able to be bent around the wiring circumference, The other coupling remaining portion of the auxiliary connector 400 coupled to the accessory 200 may be cut to finish.

To this end, a first coupling part 220 is formed in the accessory body 200, and a second coupling part detachable from the other end of the auxiliary connector 400 in correspondence with the first coupling part 220 ( 410 is preferably formed.

For example, the second coupling portion 410 is implemented in the form of a series of fixing protrusions formed on the other end of the auxiliary connector 400, the first coupling portion 220 is one of the series of fixing protrusions By implementing in the form of a latch for fixing can be detachable in a belt manner.

That is, in this embodiment, since the wiring is circumferentially variable in accordance with the number thereof, one side of the main connecting body can be installed so as to install the RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention in accordance with the variable wiring circumference. Is connected to one side of the 300, the other side is configured to connect the auxiliary body 400 of the flexible material (Flexible) material detachable with the accessory 200 through the illegal wiring according to the present invention to match the wiring circumference One embodiment is to prevent the installation of an RFID tag device for power distribution facility management to prevent.

Since one side of the main connector 300 and one side of the auxiliary connector 400 are connected, the main connector 300 does not affect the main body 100 in which the antenna pattern 110 is formed when bending the wire 900. And only the auxiliary connector 400 is bent to the wire 900, and the second coupling part 410 is coupled to the first coupling part 220 to fix the wire, and the auxiliary is coupled to the accessory 200. By cutting and closing the other side of the remaining coupling portion 400 is aesthetically beautiful. In this case, since the RFID chip 210 is considerably smaller than the antenna pattern 110, the RFID chip 210 is less likely to be bent during bending.

By doing so, the RFID tag device for power distribution facility management, which prevents illegal wiring according to the present invention, is versatile because it can be banded around an uneven wiring circumference.

On the other hand, according to an additional aspect of the present invention, the antenna 110 of the RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention is connected to the other side of the accessory 200 and the auxiliary connector 400. If not, it may emit a signal of the RFID frequency band, if not connected may be implemented to emit a signal other than the RFID frequency band.

That is, since the auxiliary wire 400 is not provided with a lead wire, when this part is cut and wired, an RFID reader (not illustrated) includes an RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention. Even after being truncated, a normal signal is detected.

In order to prevent this, the RFID tag device for power distribution facility management, which prevents illegal wiring according to the present invention, radiates a signal of an RFID frequency band when it is banded, and emits a signal other than the RFID frequency band when it is not banded. Prevent illegal wiring.

Specifically, when the first coupling part 220 formed in the accessory body 200 and the second coupling part 410 formed on the other side of the auxiliary connector 400 are combined, radiating a signal of an RFID frequency band, If not coupled to implement a signal other than the RFID frequency band so that the lead wire is not provided even if the part of the auxiliary connector 400 is cut so that the illegal wiring.

For example, by configuring a peripheral circuit for impedance matching to the antenna pattern as shown in Figure 2, when the RFID tag device for power distribution equipment management to prevent illegal wiring according to the present invention, the signal of the RFID frequency band radiates, banding If not, it may be possible to emit signals other than the RFID frequency band.

Referring to the drawings, a first capacitor C1 is installed in an antenna pattern forming a closed loop, and a second capacitor C2 and a third capacitor C3 connected in parallel to one side of the first capacitor C1 are installed. And a fourth capacitor C4 and a fifth capacitor C5 so as to be connected in series to the other end and the ground terminal of each of the second and third capacitors C2 and C3, respectively, and a second capacitor C2 connected in series. ) And the connection contact between the fourth capacitor C4 and the third capacitor C3 and the fifth capacitor C5 connected in series are electrically connected to each other.

In addition, an eighth capacitor C8 and a ninth capacitor C9 connected in parallel to the other side of the first capacitor C1 are installed, and the other end and the ground end of each of the eighth and ninth capacitors C8 and C9, respectively. A sixth capacitor C6 and a seventh capacitor C7 so as to be connected in series to each other, and a connection contact between the eighth capacitor C8 and the seventh capacitor C7 connected in series, and a ninth capacitor connected in series C9) and the sixth capacitor C6 are electrically connected to each other.

Therefore, the frequency characteristics of the antenna change depending on whether the lead wire formed on the main connector 300 changes, and thus the frequency circuit is tuned to radiate a signal of an RFID frequency band or a signal other than the RFID frequency band, and the peripheral circuit configured by combining the capacitors. By matching impedance through the RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention to radiate the signal of the RFID frequency band, if not banded to radiate signals other than the RFID frequency band Can be.

In other words, when the antenna is bent, its characteristics change. Electromagnetic waves propagate in space in the shape of a sphere from the point of generation, and at the same time transmit energy to the surrounding space as the distance from the radiation source increases, and radiation power per unit area divided by the surface area of the sphere, which increases this energy, The radiated power P _S has the following equation.

(Eq. 5)

In equation (5), the scattering aperture σ is a measure of how well an object reflects electromagnetic waves. This can only be calculated precisely for simple surfaces such as spheres or flat surfaces, depending on the size of the object, its shape, its material, its surface structure, as well as its range of parameters such as wavelength and polarization. When the antenna is bent or deformed, the electromagnetic wave actually changes the contact surface, so the scattering aperture σ also changes, and the power radiated from the antenna also changes.

Power P _e received from the antenna has the following equation.

(Equation 6)

The effective opening surface A _e has the same value as the scattering opening surface on which electromagnetic waves are reflected, and thus becomes (Equation 7).

(Eq. 7)

Therefore, if the aperture changes, whether reflected or received, the power also changes, affecting the antenna characteristics.

10 to 13 and 14 to 17 show a comparison between the case where the dipole antenna having the same parameter is not bent and the case where the bend is bent. 10 shows a typical dipole antenna having a resonant frequency of 912 MHz and S11 of -15.17 dB. 11 and 12 show S11 and a Smith chart, respectively, and FIG. 13 shows a radiation pattern of an antenna.

On the other hand, Figure 14 is a bent general dipole antenna, the resonant frequency of 858MHz and S11 represents -3.691dB, unlike the antenna shown earlier, the resonant frequency is reduced by 54MHz and S11 also differs by 11.479dB, the antenna characteristics It can be seen that the radiation pattern is also changed. 15 and 16 show S11 and Smith chart, respectively, and FIG. 17 shows the radiation pattern of the antenna. Even if the same antenna is bent, the characteristics of the antenna can be seen to change.

18 to 20 show a case where the lead wire 310 connected to the antenna 110 pattern is bent (bended), and FIGS. 21 to 23 show the lead wire 310 connected to the antenna 110 pattern unfolded (bending). Is an illustration of antenna characteristics.

As shown in FIG. 18, when the lead wire 310 connected to the antenna 110 pattern is bent as shown in FIG. 18, the resonance frequency is 912 MHz as shown in FIG. 19, and S11 represents −18.48 db. In the state in which the lead wire 310 connected to the antenna 110 pattern is opened as shown in FIG. 21, the resonance frequency is 1095 MHz and S11 represents -15.81 dB as shown in FIG. 22, but the frequency varies greatly as in the dipole antenna described above. You can see that it doesn't change much. 20 and 23 show the radiation pattern of the antenna, it can be seen that the pattern does not change than the dipole antenna described above.

On the other hand, according to an additional aspect of the present invention, as shown in Figure 3, the RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention is the main connector 300 or the auxiliary connector 400 or the same. It may be implemented to further include a pressure sensor 500 for sensing the pressure by the wiring installation on the opposite side of the both wire is bent. 3 is a view showing another embodiment of an RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention.

That is, this embodiment is a configuration for detecting this when laying the wiring to the outside without cutting the RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention, the main connector 300 or auxiliary connection The pressure sensor 500 is installed on the opposite surface where the wires 400 or both of the wires are bent to detect the pressure due to the wire laying on the outside. For example, when an external force is applied to the pressure sensor by a predetermined level or more, an RFID chip ( By changing the flag bit stored in 210 and reading this flag bit value by an RFID reader (not shown), wiring is performed outside without cutting the RFID tag device for managing the power distribution equipment which prevents illegal wiring according to the present invention. Detect that this is illegally laid.

In this case, in order to monitor whether the pressure sensor 500 is illegally installed in the outside, the RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention should be actively configured.

As described above, in the present invention, a lead wire is formed between the antenna and the RFID chip so that whether the lead wire is cut or not can be recognized, but only the lead wire portion is bent on the wire, thereby not bending the antenna pattern. Since a fall can be prevented, the objective of this invention presented above can be achieved.

While the invention has been described with reference to the preferred embodiments, which are referred to by the accompanying drawings, it is apparent that various modifications are possible without departing from the scope of the invention within the scope covered by the following claims from this description. .

The present invention can be used industrially in the field of distribution management technology using RFID and its application technology.

1 is a view showing an embodiment of an RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention

2 is a peripheral circuit diagram for impedance matching

3 is a view showing another embodiment of an RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention;

4 is a diagram illustrating an example of an antenna pattern;

5 is a gain characteristic diagram of the antenna pattern shown in FIG.

6 is a Smith chart for impedance matching of the antenna pattern shown in FIG.

7 shows another example of an antenna pattern;

8 is a gain characteristic diagram of the antenna pattern shown in FIG.

9 is a Smith chart for impedance matching of the antenna pattern shown in FIG.

10 is a diagram illustrating an example of a case in which a dipole antenna is not bent;

FIG. 11 is a resonance frequency characteristic diagram of the dipole antenna shown in FIG.

FIG. 12 is a Smith chart of the dipole antenna shown in FIG. 10.

FIG. 13 is a diagram illustrating a radiation pattern of the dipole antenna shown in FIG. 10.

14 illustrates an example of bending a dipole antenna;

15 is a resonance frequency characteristic diagram of the dipole antenna shown in FIG.

FIG. 16 is a Smith chart of the dipole antenna shown in FIG.

17 is a view showing a radiation pattern of the dipole antenna shown in FIG.

18 is a diagram illustrating an example of bending a lead wire of an RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention.

19 is an antenna resonance frequency characteristic diagram of an RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention shown in FIG.

FIG. 20 is a diagram illustrating an antenna radiation pattern of an RFID tag device for power distribution facility management according to the present invention shown in FIG. 18.

21 is a view illustrating an example in which a lead wire of an RFID tag device for power distribution facility management that prevents illegal wiring according to the present invention is not bent;

22 is an antenna resonance frequency characteristic diagram of an RFID tag device for power distribution facility management to prevent illegal wiring according to the present invention shown in FIG.

FIG. 23 is a diagram illustrating an antenna radiation pattern of an RFID tag device for power distribution facility management according to the present invention shown in FIG. 21.

<Explanation of symbols for the main parts of the drawings>

100: main body 110: antenna

200: appendage 210: RFID chip

220: first coupling part 300: main connector

310: lead wire 400: auxiliary connector

410: second coupling portion 900: wiring

Claims (10)

A main body having an antenna pattern; An accessory having an RFID chip spaced apart from the antenna pattern provided in the main body; Flexible at least one wire is banded, and a lead wire is formed between the antenna pattern and the RFID chip so that the signal response to the RFID reader is interrupted when the lead wire is cut, so that it is possible to know whether the wire is illegal. Main connecting material; RFID tag device for power distribution equipment management to prevent illegal wiring. The method of claim 1, The RFID tag device for power distribution facility management to prevent the illegal wiring: One side is connected to one side of the main connector, the other side is detachable with the accessory, the auxiliary connector made of a flexible material (Banding) for bending at least one wire; An RFID tag device for power distribution facility management, further comprising illegal wiring. The method of claim 2, When the wiring banding, the antenna pattern is banded so as to be spaced apart from the wiring, the RFID tag device for managing the distribution equipment to prevent illegal wiring. The method of claim 2, When the wire bending, the other side length of the auxiliary connector coupled to the accessory can be adjusted to match the wiring circumference, it can be banded according to the wiring circumference characterized in that it prevents illegal wiring. The method of claim 4, wherein When wiring bending, RFID tag device for power distribution equipment management to prevent the illegal wiring, characterized in that for cutting and closing the other remaining remaining coupling portion of the auxiliary connector coupled to the accessory. The method of claim 2, The attachment is formed with a first coupling portion, the other end of the auxiliary connector is formed a second coupling portion that is detachable corresponding to the first coupling portion is RFID distribution management equipment for preventing wiring Device. The method according to any one of claims 2 to 6, The antenna is: When the other side of the accessory and the auxiliary connection is connected to radiate a signal of the RFID frequency band, if not connected to the distribution facility management to prevent illegal wiring, characterized in that radiating a signal other than the RFID frequency band RFID tag device. The method according to any one of claims 2 to 6, The RFID tag device for power distribution facility management to prevent the illegal wiring: A pressure sensor for sensing a pressure due to an external wiring installation on an opposite surface on which the wiring of the main connecting body or the auxiliary connecting body or both is bent; An RFID tag device for power distribution facility management, further comprising illegal wiring. The method according to any one of claims 1 to 6, The RFID tag device for power distribution facility management to prevent the illegal wiring: An RFID tag device for power distribution equipment management to prevent illegal wiring, characterized in that the passive (Passive) operated by the RFID reader. The method of claim 8, The RFID tag device for power distribution facility management to prevent the illegal wiring: RFID tag device for power distribution management to prevent illegal wiring, characterized in that the active (Active) that is operated by its own battery.

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