KR20060058253A - Radio frequency identification tag - Google Patents

Abstract

The present invention inserts an electrically insulating spacer having a thickness of 3 to 10 mm to provide an interval between the radio frequency identification label and the managed object, so that even when the managed object is formed of metal, the metal article is not affected by the metal article. It relates to a radio frequency identification tag (radio frequency identification tag) so that the reception rate of the identification mark does not fall.

The radio frequency identification label according to the present invention is inserted into an electrically insulating spacer having a thickness of 3 to 10 mm between the radio frequency identification label and the article, even when the object to be managed is formed of metal, and thus is not affected by the metal article. There is an effect that the reception rate of the identification mark does not fall.

In the present invention, a variety of information of the article to be managed is stored in the RFID chip to communicate with the terminal; An antenna having a rectangular chip mounting groove formed at one end thereof and having a rectangular shape; A spacer configured to have electrical insulation between the antennas so that the reception rate of the radio frequency identification label does not fall; The antenna is formed of a sheath formed of an insulator formed to avoid electrical connection with the object to be managed and to increase moisture resistance and durability. The antenna is coupled to the upper and lower surfaces of the spacer in parallel to each other. One side is coupled to the chip seating groove of the antenna, the other side is coupled to one end of the antenna is formed surrounded by the entirety to transmit its information to the reader by emitting an active signal through the antenna reader It provides a radio frequency identification label configured to recognize the information of the RFID chip.

RF identification label, RFID.

Description

Radio frequency identification tag

1 is an exploded perspective view of a radio frequency identification label according to the present invention;

Figure 2 is a perspective view of a radio frequency identification label according to the present invention, Figure 2a is a perspective view of a radio frequency identification label in a state where the adhesive coating is attached, Figure 2b is a radio frequency identification label showing a state of peeling off the adhesive coating Perspective,

3 is a cross-sectional view taken along line AA ′ of FIG. 2;

4 is a flowchart schematically showing an operation process of an RF label according to the present invention;

5 is a perspective view of a conventional radio frequency identification label, Figure 5a is a perspective view of a radio frequency identification label in a state where the adhesive coating is separated, Figure 5b is a perspective view of a radio frequency identification label showing a state of peeling off the adhesive coating.

<< Explanation of symbols for main part of drawing >>

1: Main board 2: RFID chip

3, 3 ': antenna 4: adhesive coating

10: radio frequency identification label 20: RFID chip

21: chip 22: substrate

30, 30 ': antenna 31: chip seating groove

40: spacer 50: sheath

60: adhesive coating

S10: RF signal transmission S15: RF signal reception

S20: Identification data withdrawal S25: RF transmission

S30: RF signal reception S35: read processing

S40: Data transfer to user computer

S45: Display unit output

The present invention relates to a radio frequency identification tag, and more specifically, to insert a spacer having an electrical insulating thickness of 3 to 10 mm to provide a space between the radio frequency identification label and the article to be managed, The present invention relates to a radio frequency identification label that does not affect the reception rate of the radio frequency identification label even when the object to be managed is formed of metal.

RFID (radio frequency identity) (RFID) is a field of automatic recognition, such as a barcode, magnetic, IC-card, etc. is a state-of-the-art method for wirelessly recognizing information recorded using microwave or long wave. The principle of the RFID is to receive the information stored in the tag through the antenna, so that the controller can recognize and analyze the information and acquire the unique information of the article equipped with the tag. · It is not affected by the environment such as dust and magnetic flux, and it has a fast passage speed so that it can be recognized on the move, it can be recognized at a long distance, and it is impossible to forge by assigning a unique ID in the manufacturing process.

The RFID is applied to a supermarket, parking management, and the like. For example, in the case of a supermarket, when a tag having unique information is recorded on a sale item, the controller remains on the display stand using the information received through the tag. It can automatically grasp the quantity of goods, etc., and can easily collect information about the purchased goods even if the consumer does not calculate separately, it can be provided as a convenience such as payment by credit card.

Conventionally, the radio frequency identification label includes an electromagnetic induction type and an electromagnetic coupling type, and both of them use electromagnetic waves and are in contact with a read write terminal or the like to perform communication. The RFID tag includes an antenna coil and a control unit. When the antenna coil receives a transmission signal from a read / write terminal, the RFID tag stores the power as an electric power and stores it in the capacitor, and stores the actual information in the storage unit using the power (Id). The information such as code is transmitted from the antenna coil to the read / write terminal again.

There are two types of transmission and reception methods: amplitude shift keying (ASK) and frequency shift keying (FSK). The former performs transmission and reception by amplitude shift modulation of the electromagnetic wave, and the latter performs frequency modulation of the electromagnetic wave. Transmit and receive by When the general RFID tag is classified into an antenna coil type, there are two types of disk antenna coils, which use circular hollow core coils, and cylindrical antenna coils wound with encapsulated coated copper wire such as enameled wire in a rod-shaped ferrite core. Corresponding to the shape of each antenna coil, the former is formed in a disk shape and the latter is formed in a rod shape. The RFID tag having the disk-shaped antenna coil performs communication by using the magnetic flux change in the plane direction of the circular coil, and the RFID tag having the cylinder-shaped antenna coil performs communication by using the magnetic flux change in the axial direction. In addition, in the storage, transportation, and use of RFID tags, in order to protect them from external stress or impact, the surroundings are often covered with a container or the like, but the RFID reader and the RFID tag communicate with each other outside the container. In order to use the material of the container, it is common to use a non-conductive member such as plastic without using a conductive member made of a communication barrier.

By the way, the electromagnetic wave is to switch the alternating magnetic field and the magnetic field to the phase of 90 degrees, but when the alternating magnetic flux caused by the magnetic field crosses the conductive member such as iron, aluminum, copper, overcurrent occurs in the conductive member, Magnetic flux is generated in the direction of negating the alternating magnetic field due to overcurrent. Therefore, the conventional RFID tag is generally installed as far away from the conductive member as possible. In addition, in order to protect the installed RFID tag from external stress or shock, it is necessary to cover the surface side with a protective member, but in order for the RFID tag to communicate with a read write terminal or the like from the outside of the protective member As the material of the sieve, a conductive material composed of a communication barrier cannot be used, and non-conductive materials such as plastic chips are generally used. Therefore, since non-conductive members such as plastics are not so high in strength, RFID tags are often not sufficiently protected. For example, when the RFID tag is installed in a metal manhole cover or the like, there is a problem in durability since the traffic load due to the passage of a vehicle is applied without being reduced.

In addition, the conventional radio frequency identification label used for this tag is formed by winding a conductive wire coated with an insulating layer in a substantially square swirl shape and adhering to the main board in order to make the thickness as thin as possible, or laminated on the main board. The conductive layer such as aluminum foil or copper foil is removed by an etching method or a punching method to remove unnecessary parts and used to form a swirl. In the radio frequency identification label provided with such an antenna, when the object to be managed is formed of metal, there is a problem that the reception rate of the radio frequency identification mark decreases under the influence of the metal article, so that the antenna is electrically connected to the conductive member. For this purpose, it was necessary to fix the insulating member on the surface of the conductive member with the insulating film interposed therebetween.

However, there are many applications in steel products. Applications include steel mill roll shops and steel self-history management, gas cylinder management, and reactor drums. First, in the case of steel mills, there is a field of managing steel products by tagging steel itself, and a roll shop field of managing rolls in a roll shop. Steel product management is because humans attach barcodes to the produced cold rolled coils. First, it is impossible to read several barcodes at the same time, secondly, it is impossible to read and write data, and thirdly, it is necessary to correct Not only can data not be obtained, but the distance to be recognized is limited. In the case of roll shops, it was not possible to use recognition equipment such as bar codes or optical sensors due to the harsh environment in the steel mill, that is, high temperature rising to several tens of degrees, coolant for cooling, and dust. Therefore, each roll was processed by hand, such as writing in chalk, which was unreasonable because the erased or written information is not always visible at the designated location. Therefore, by attaching a tag to the side of the roll and applying an RF reader to equipment such as a crane or a PDA, the recognition rate can be increased and the convenience of work can be increased. However, since all of these products are steel products, If close, the recognition rate is close to 0%. So there was a problem that the tag must be machined to be usable in steel.

The present invention is to solve the above problems, the effect of the metal article even if the article to be managed is formed of metal by inserting a spacer having an electrical insulating thickness of 3 ~ 10mm between the radio frequency identification label and the article The purpose of the present invention is to provide a radio frequency identification label capable of managing the history of a metal product and the contents of a metal container by preventing the reception rate of the radio frequency identification label from falling.

In order to achieve the above object, the radio frequency identification label of the present invention is stored in a variety of information of the article to be managed RFID chip for communicating with the terminal; An antenna having a rectangular chip mounting groove formed at one end thereof and having a rectangular shape; A spacer configured to have electrical insulation between the antennas so that the reception rate of the radio frequency identification label does not fall; The antenna is formed of a sheath formed of an insulator formed to avoid electrical connection with the object to be managed and to increase moisture resistance and durability. The antenna is coupled to the upper and lower surfaces of the spacer in parallel to each other. One side is coupled to the chip seating groove of the antenna, the other side is coupled to one end of the antenna is formed surrounded by the entirety to transmit its information to the reader by emitting an active signal through the antenna reader The present invention provides a radio frequency identification mark configured to recognize information of the RFID chip.

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

1 is an exploded perspective view of a radio frequency identification label according to the present invention, FIG. 2 is a perspective view of a radio frequency identification label according to the present invention, FIG. 2b is a perspective view of a radio frequency identification label showing a state of peeling off the adhesive coating, Figure 3 is a cross-sectional view along the line A-A 'of Figure 2, Figure 4 is an operation of the radio frequency identification label according to the present invention 5 is a perspective view of a conventional radio frequency identification label, FIG. 5a is a perspective view of a radio frequency identification label in a state in which an adhesive coating is separated, and FIG. 5b is a radio view showing a state in which an adhesive coating is peeled off. A perspective view of a frequency identification label.

An RFID chip 20 formed by attaching the chip 21 containing information of the object to be managed to the substrate 22 provided by bending twice and communicating with the terminal; An antenna 30 and a rectangular antenna 30 'having a chip mounting groove 31 formed at one end thereof in a rectangular shape; A spacer 40 configured to have electrical insulation between the antennas 30 and 30 'so that the reception rate of the radio frequency identification label does not fall; The upper and lower sides of the spacer 40 are composed of a sheath 50 made of an insulator formed to avoid the electrical connection of the antennas 30 and 30 'with the article to be managed and to increase moisture resistance and durability. One side of the RFID chip 20 is coupled to the antenna 30, 30 ′ on the surface thereof, and the RFID chip 20 is coupled to the side surface of the spacer 40. It is coupled to one end of the other side is coupled to one end of the antenna (30 ') is formed to be surrounded by the entirety of the sheath (50) to emit its own information through the antenna 30, 30' It is characterized in that the reader to recognize the information of the RFID chip 20 by transmitting to the reader.

In addition, the antenna 30, 30 'of the radio frequency identification label of the present invention is characterized in that made of copper (Cu).

The RFID chip 20 stores various kinds of information on the object to be managed and communicates with the terminal (reader) to provide the information. The RFID chip 20 is formed by attaching a chip 21 containing information of an article to be managed to a substrate 22. The substrate 22 is provided in a shape bent twice.

The antenna 30, 30 'is composed of a thin thin plate of a rectangular shape to minimize the thickness, and transmits its information to the reader by emitting an active signal through the antenna 30, 30' Allow the reader to recognize the information of the RFID chip 20.

In order to prevent the antennas 30 and 30 'from being electrically connected to the object to be managed, the spacer 40 is spaced apart from the object to be managed so that the antennas 30 and 30' fit together. It is provided so as not to touch.

Moreover, it is preferable that the thickness of the said spacer is 3-10 mm. When the size of the spacer 40 becomes thicker, the thickness of the radio frequency identification label 10 becomes thicker. Therefore, when the radio frequency identification label 10 is attached to the object to be managed, when transporting or moving the object to be managed, or There is a problem that the radio frequency identification label 10 easily falls from the object to be managed when the object is moved. In addition, the spacer 40 is preferably made of a material such as ceramic, sponge, Teflon.

Ceramics are made of non-metallic inorganic solid materials made by heat treatment at high temperatures and have excellent fire resistance.

Sponge is a sponge made of natural rubber or synthetic resin, and refers to a porous material on the sponge which is elastic. Representative polymers are polyurethanes, and are manufactured and used as flexible urethane foams (soft foamed polyurethane). Foaming is often made with carbon dioxide produced during polyurethane production, but foaming agents such as flangas are also used in combination. There are also viscose sponges made of viscose rayon and spongy rubber made by foaming rubber with foaming agents.

 Teflon (polytetrafluoroethylene; PTFE) is a crystalline resin that is heat resistant to long-term use at 260 ° C and has unique chemical resistance, electrical insulation, high frequency characteristics, non-adhesiveness, low friction coefficient, and flame resistance. PTFE is a crystalline polymer with a melting point of 327 ° C. Its continuous use temperature is 260 ° C and can be used stably from low temperature (-268 ° C) to high temperature. Chemical resistance is the highest among organic materials. It does not invade alkali or various solvents at all, and invades only special chemicals such as fluorine gas, molten alkali metal, and trifluorochlorine, and is used in gaskets, packings, various sealing materials, and the like.

The biggest feature of the mechanical properties is that the friction coefficient is small and is reinforced with various fillers and is used for bearings of oil-free sliding materials. In addition, its non-adhesiveness is also great, making it ideal for coating frying pans and various steel pipes.

The electrical properties, especially the dielectric properties, are the best, and wide frequencies are stable over the temperature range and exhibit low permittivity and dielectric loss tangent. Corona resistance is inferior, but other insulation properties are also excellent. As an electronic component, it is used for components, such as a communication computer electronic device.

The sheath 50 is composed of an insulator formed to prevent the antennas 30 and 30 'from being electrically connected to the object to be managed and to increase moisture resistance and durability. In the case where the antenna is made of aluminum foil, copper foil, or the like, in order to avoid the antenna 30, 30 'being electrically connected to the conductive member, it is necessary to fix the insulating member on the surface of the conductive member with an insulating film therebetween. to be.

The radio frequency identification label of the present invention configured as described above is coupled to the upper and lower surfaces of the spacer 40 and the antennas 30 and 30 'are coupled in parallel, and the RFID chip 20 is connected to the spacer ( One side of the substrate 22 of the RFID chip 20 is coupled to one end of the antenna 30 and the other side is coupled to one end of the antenna 30 'such that the RFID chip 20 is coupled to the side of the RFID chip 20. 20 is coupled to the side of the spacer 40, the entirety is formed surrounded by the sheath 50 to transmit its information to the reader by emitting an activation signal through the antenna 30, 30 ' The reader can recognize the information of the RFID chip 20.

In addition, it is preferable that the chip mounting groove 31 is formed at one end of the antenna 30. The chip seating groove 31 of the antenna 30 may avoid the external shock or collision with the internal antenna 30 due to the RFID chip 20 being seated, thereby preventing an error in recognizing the information of the RFID chip 20. Can be reduced.

In addition, the antenna 30, 30 ′ is preferably made of copper (Cu), gold (Au), silver (Ag) with good electrical conductivity. Copper has the advantages of being easy to obtain, very easy to process and inexpensive.

The radio frequency identification cover configured as described above is preferably about 8 to 12 cm in length and about 1 to 5 cm in length, and the thickness of the antennas 30 and 30 'is about 0.05 to 1 cm. Is preferred.

As shown in FIG. 4, when an RF signal is transmitted to read identification data previously recorded in the RFID chip 20 through the terminal (step S10), the RF tag is attached to the RFID tag 2 attached to the article to be used. A signal is received (step S15). At this time, the radio frequency identification label 10 extracts the unique identification data received from the memory (step S20), and then loads it on the RF signal and transmits it to the outside (step S25). When the RF signal is received at the terminal (step S30), a read process is performed (step S35), and the result of the read process is transmitted to an external user computer to perform recognition and settlement of information corresponding to the read data. In addition, the database is converted (step S40). In addition, the information corresponding to the read data is output through the display unit (step S45).

In the above, preferred embodiments of the present invention have been described with reference to the accompanying drawings. Here, the embodiments described in the specification and the drawings shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, it is possible to replace them at the time of the present application It should be understood that there may be various equivalents and variations.

As described above, the radio frequency identification label according to the present invention is inserted between the radio frequency identification label and the article with an electrically insulating spacer having a thickness of 3 to 10 mm so that the reception rate of the radio frequency identification label does not fall. Even when the article is made of metal, it is not affected by the metal article, so that it is possible to manage the history of the metallic article.

Claims (9)

An RFID chip 20 formed by attaching the chip 21 containing information of the object to be managed to the substrate 22 provided by bending twice and communicating with the terminal; An antenna 30 and a rectangular antenna 30 'having a chip mounting groove 31 formed at one end thereof in a rectangular shape; A spacer 40 configured to have electrical insulation between the antennas 30 and 30 'so that the reception rate of the radio frequency identification label does not fall; A cover 50 made of an insulator formed to avoid the electrical connection of the antennas 30 and 30 'with the article to be managed and to increase moisture resistance and durability; and each of the upper and lower sides of the spacer 40 The antenna 30, 30 ′ of the RFID chip 20 is coupled to the surface in parallel, and one side of the substrate 22 of the RFID chip 20 is coupled to the side surface of the spacer 40. It is coupled to one end of the antenna 30, the other side is coupled to one end of the antenna (30 '), the entirety is formed surrounded by the sheath 50, the active signal through the antenna 30, 30' Radio frequency identification label, characterized in that by transmitting the information to the reader to the reader to recognize the information of the RFID chip (20). The radio frequency identification label according to claim 1, wherein the antenna (30) has a chip seating groove (31) formed at one end thereof. The radio frequency identification label according to claim 1 or 2, wherein the antenna (30) (30 ') is made of copper (Cu). 3. The radio frequency identification label according to claim 1 or 2, wherein the antenna (30) (30 ') is made of gold (Au). 3. The radio frequency identification label according to claim 1 or 2, wherein the antenna (30) (30 ') is made of silver (Ag). The radio frequency identification label according to claim 1, wherein the spacer (40) has a thickness of 3 to 10 mm. 7. The radio frequency identification label according to claim 1 or 6, wherein the spacer (40) is made of a sponge. 7. The radio frequency identification label according to claim 1 or 6, wherein the spacer (40) is made of ceramics. 7. The radio frequency identification label according to claim 1 or 6, wherein the spacer (40) is made of Teflon.

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