WO2020026482A1 - Système d'identification par radiofréquence (rfid) et dispositif de stockage d'étagère ayant une étiquette rfid installée - Google Patents

Système d'identification par radiofréquence (rfid) et dispositif de stockage d'étagère ayant une étiquette rfid installée Download PDF

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Publication number
WO2020026482A1
WO2020026482A1 PCT/JP2019/006189 JP2019006189W WO2020026482A1 WO 2020026482 A1 WO2020026482 A1 WO 2020026482A1 JP 2019006189 W JP2019006189 W JP 2019006189W WO 2020026482 A1 WO2020026482 A1 WO 2020026482A1
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WIPO (PCT)
Prior art keywords
conductor
rfid tag
storage device
rack storage
rfid
Prior art date
Application number
PCT/JP2019/006189
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English (en)
Japanese (ja)
Inventor
越智　達也
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株式会社村田製作所
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Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to JP2019536998A priority Critical patent/JP6590131B1/ja
Publication of WO2020026482A1 publication Critical patent/WO2020026482A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/59—Responders; Transponders
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
    • H04B5/48—Transceivers

Definitions

  • the present invention relates to an RFID (Radio-Frequency IDentification) system and a rack storage device with an RFID tag used in the RFID system.
  • RFID Radio-Frequency IDentification
  • Patent Document 1 discloses a configuration in which an RFID tag is attached to the surface of a rack storage device stored in a server rack, and the RFID tag is read by an identification information reading unit provided in the server rack so as to face the RFID tag.
  • an identification information reading unit provided in the server rack so as to face the RFID tag.
  • the conductor blocks wireless communication between the identification information reading unit and the RFID tag, and reads the RFID tag. Things that can't be done can happen.
  • An object of the present invention is to provide an RFID system and a rack storage device with an RFID tag that can read an RFID tag more reliably without depending on the material of the surface of the rack storage device.
  • the RFID system comprises: A rack having a metal surface inside the housing, A rack storage device that is housed inside the housing so that it can be inserted and removed in the insertion and extraction direction, An RFID tag including an RFID element having a pair of terminal electrodes, a radiating element connected to one of the pair of terminal electrodes, and a ground conductor connected to the other of the pair of terminal electrodes, A cable-shaped reader / writer antenna wired inside the housing and capable of wirelessly communicating with the RFID tag;
  • An RFID system comprising: The rack storage device has a tag mounting surface parallel to the insertion / extraction direction, The RFID tag is configured such that the radiating element protrudes from the rack storage device in the insertion and removal direction, and is attached so that at least a part of the ground conductor faces the tag attachment surface.
  • the rack storage device with an RFID tag includes: Rack storage equipment that is stored inside the rack so that it can be inserted and removed in the insertion and extraction direction, An RFID tag including an RFID element having a pair of terminal electrodes, a radiating element connected to one of the pair of terminal electrodes, and a ground conductor connected to the other of the pair of terminal electrodes, With The rack storage device has a tag mounting surface parallel to the insertion / extraction direction, The RFID tag is configured such that the radiating element protrudes from the rack storage device in the insertion / removal direction, and is attached so that at least a part of the ground conductor faces the tag attachment surface.
  • the RFID tag can be read more reliably without depending on the material of the surface of the rack storage device.
  • FIG. 1 is a perspective view illustrating a schematic configuration of an RFID system including a reader / writer device according to an embodiment. It is a front view of the RFID system of FIG.
  • FIG. 2 is a side view showing the inside of the RFID system of FIG. 1. It is a top view showing an example of an RFID tag.
  • FIG. 2 is an exploded perspective view illustrating an example of an RFIC element. It is a schematic structure figure showing an example of a reader / writer antenna.
  • FIG. 6B is a schematic diagram of a matching circuit unit included in the reader / writer antenna of FIG. 6A.
  • FIG. 6B is a plan view of a matching circuit unit included in the reader / writer antenna of FIG. 6A.
  • FIG. 7B is a sectional view taken along line A1-A1 of FIG. 7A.
  • FIG. 6B is an equivalent circuit diagram of a matching circuit unit included in the reader antenna of FIG. 6A. It is a front view which shows the modification which attached the RFID tag to the bottom face of rack storage equipment. It is a front view which shows the modification which attached the RFID tag to the side surface of the rack storage apparatus.
  • An RFID system includes: A rack having a metal surface inside the housing, A rack storage device that is housed inside the housing so that it can be inserted and removed in the insertion and extraction direction, An RFID tag including an RFID element having a pair of terminal electrodes, a radiating element connected to one of the pair of terminal electrodes, and a ground conductor connected to the other of the pair of terminal electrodes, A cable-shaped reader / writer antenna wired inside the housing and capable of wirelessly communicating with the RFID tag;
  • An RFID system comprising: The rack storage device has a tag mounting surface parallel to the insertion / extraction direction, The RFID tag is configured such that the radiating element protrudes from the rack storage device in the insertion / removal direction, and is attached so that at least a part of the ground conductor faces the tag attachment surface.
  • the conductor can be used as a booster antenna, and the antenna gain can be improved. That is, according to the configuration, the RFID tag can be read more reliably without depending on the material of the surface of the rack storage device.
  • the rack may be a server rack having metal surfaces on a plurality of inner surfaces of a rectangular parallelepiped housing.
  • a plurality of the rack storage devices are stored so as to be arranged in a vertical direction orthogonal to the insertion / removal direction, and the reader / writer antenna has one end connected to a power supply unit, And a second conductor extending from one end to the other end along the first conductor, and the other end of the first conductor And a matching circuit board having a matching circuit portion connected to the first portion and the other end of the second conductor for matching the impedance of the first conductor and the impedance of the second conductor. May be arranged to extend in the up-down direction along the inner surface of the housing. According to this configuration, the RFID tags of a plurality of rack storage devices can be read more efficiently by one reader / writer antenna, and the length of the reader / writer antenna can be further reduced.
  • the RFID tag and the cable-shaped main body may be arranged on the inner side of the housing so as to be biased toward the upstream side in the insertion / extraction direction. According to this configuration, the RFID tags of a plurality of rack storage devices can be more reliably read by one reader / writer antenna.
  • the cable-shaped main body may be provided at a position overlapping with the radiating element of the RFID tag in a side view as viewed from a lateral direction orthogonal to the insertion / extraction direction and the vertical direction. According to this configuration, the RFID tags of a plurality of rack storage devices can be more reliably read by one reader / writer antenna.
  • the rack storage device with an RFID tag includes: Rack storage equipment that is stored inside the rack so that it can be inserted and removed in the insertion and extraction direction, An RFID tag including an RFID element having a pair of terminal electrodes, a radiating element connected to one of the pair of terminal electrodes, and a ground conductor connected to the other of the pair of terminal electrodes, With The rack storage device has a tag mounting surface parallel to the insertion / extraction direction, The RFID tag is configured such that the radiating element protrudes from the rack storage device in the insertion / removal direction, and is attached so that at least a part of the ground conductor faces the tag attachment surface.
  • the conductor can be used as a booster antenna, and the antenna gain can be improved. That is, according to the configuration, the RFID tag can be read more reliably without depending on the material of the surface of the rack storage device.
  • FIG. 1 is a perspective view illustrating a schematic configuration of an RFID system including a reader / writer device according to the present embodiment.
  • FIG. 2 is a front view of the RFID system of FIG.
  • FIG. 3 is a side view showing the inside of the RFID system of FIG.
  • the RFID system is a system that manages a plurality of rack storage devices stored inside a server rack installed in a data center using an RFID tag. According to this system, for example, even if the rack storage device is offline, it is possible to manage the rack storage device by reading the information of the RFID tag.
  • an RFID system 1 includes a server rack 2, which is an example of a rack, a rack storage device 3 stored in the server rack 2, and a cable-shaped reader / writer antenna 4.
  • the server rack 2 has a metal surface inside the housing 21 which is an outer shell.
  • the server rack 2 has metal surfaces on a plurality of inner surfaces of the rectangular parallelepiped housing 21. More specifically, in the case 21, the upper inner surface 21A, the lower inner surface 21B, and the left and right inner surfaces 21C and 21D are made of metal.
  • the front surface (the right side in FIG. 3) and the rear surface (the left side in FIG. 3) of the housing 21 are open surfaces. However, for example, a door that can be opened and closed may be provided.
  • the rack storage device 3 is a device housed inside the housing 21 of the server rack 2 so as to be able to be inserted and removed in the insertion and removal direction X.
  • a plurality of rack storage devices 3 are stored in the housing 21 so as to be arranged in a vertical direction Z perpendicular to the insertion / extraction direction X.
  • Each rack storage device 3 has a bottom portion supported by, for example, a pair of rails (not shown) provided to extend in the insertion / extraction direction X.
  • Metal columns 21E and 21F extending in the vertical direction Z are provided on the left and right inner side surfaces 21C and 21D of the housing 21, respectively.
  • Each rack storage device 3 is fixed to the metal columns 21E and 21F by fastening members such as bolts.
  • the interval between the rack storage devices 3 adjacent to each other in the vertical direction Z is, for example, 5 cm.
  • Each rack storage device 3 has a tag mounting surface 3A parallel to the insertion / extraction direction X.
  • the tag mounting surface 3A is made of a conductor such as a metal.
  • the RFID tag 5 is attached to the tag attachment surface 3A in parallel with the insertion / extraction direction X.
  • the RFID tag 5 stores, for example, device information and position information of the rack storage device 3.
  • the reader / writer antenna 4 is wired inside the housing 21 and is configured to be able to wirelessly communicate with the RFID tag 5.
  • the reader / writer antenna 4 includes a cable-shaped main body 41, a communication module 42 connected to one end of the cable-shaped main body 41, and a matching circuit board 43 connected to the other end of the cable-shaped main body 41. ing.
  • the cable-shaped main body 41 is arranged so as to extend in the vertical direction Z along the inner side surface 21C of the housing 21.
  • the matching circuit board 43 is attached to the upper inner surface 21 ⁇ / b> A of the housing 21.
  • the communication module 42 includes an external communication antenna (not shown), transmits information of the RFID tag 5 read through the cable-shaped main body 41 to an external device, and transmits information received from the external device to the cable-shaped main body 41. Is written to the RFID tag 5 through the.
  • the RFID tag 5 and the cable-shaped main body portion 41 are arranged inside the housing 21 so as to be biased toward the upstream side (the right side in FIG. 3) in the insertion / removal direction X.
  • a “reader / writer device” that wirelessly communicates with the RFID tag 5 by the server rack 2 and the reader / writer antenna 4 to read and write information from / to the RFID tag 5 is configured.
  • FIG. 4 is a plan view showing an example of the RFID tag 5.
  • the RFID tag 5 includes an RFIC (Radio-Frequency Integrated Circuit) element 51 having a pair of terminal electrodes 51a and 51b, a radiating element 52 connected to one terminal electrode 51a, and the other terminal. And a ground conductor 53 connected to the electrode 51b.
  • RFIC Radio-Frequency Integrated Circuit
  • the radiating element 52 protrudes from the rack storage device 3 in the insertion / extraction direction X, and at least a part of the ground conductor 53 has a tag mounting surface 3 ⁇ / b> A Attached to face.
  • the cable-shaped main body 41 is provided at a position overlapping with the radiating element 52 of the RFID tag 5 in a side view as viewed from a lateral direction Y orthogonal to the insertion / extraction direction X and the vertical direction Z. I have.
  • the cable-shaped main body portion 41 is provided at a position that does not overlap with the RFID tag 5 when viewed from the front in the insertion / extraction direction X.
  • FIG. 5 is an exploded perspective view showing an example of the RFIC element 51.
  • the RFIC element 51 is, for example, an RFIC element corresponding to a communication frequency in a 900 MHz band, that is, a UHF band.
  • the RFIC element 51 includes a multilayer substrate 51A, an RFIC chip 51B built in the multilayer substrate 51A, and a matching circuit 51C.
  • the multilayer substrate 51A is composed of three laminated sheet-like insulating layers 51Aa, 51Ab, and 51Ac.
  • a pair of terminal electrodes 51a and 51b are provided on the upper surface of the uppermost insulating layer 51Aa with a space therebetween.
  • a first coil pattern 51Ca is provided at a position facing one terminal electrode 51a
  • a second coil pattern 51Cb is provided at a position facing the other terminal electrode 51b.
  • One end of the first coil pattern 51Ca is connected to one terminal electrode 51a via an interlayer connection conductor
  • the other end of the first coil pattern 51Ca is connected to the other end of the second coil pattern 51Cb.
  • One end of the second coil pattern 51Cb is connected to the other terminal electrode 51b via an interlayer connection conductor.
  • a through hole H1 into which the RFIC chip 51B is inserted is provided between the first coil pattern 51Ca and the second coil pattern 51Cb.
  • a third coil pattern 51Cc is provided at a position facing the first coil pattern 51Ca, and a fourth coil pattern 51Cd is provided at a position facing the second coil pattern 51Cb. Is provided.
  • An RFIC chip 51B is mounted between the third coil pattern 51Cc and the fourth coil pattern 51Cd.
  • One end of the third coil pattern 51Cc is connected to one end of the first coil pattern 51Ca via an interlayer connection conductor, and the other end of the third coil pattern 51Cc is connected to one input / output terminal of the RFIC chip 51B. I have.
  • One end of the fourth coil pattern 51Cd is connected to one end of the second coil pattern 51Cb via an interlayer connection conductor, and the other end of the fourth coil pattern 51Cd is connected to the other input / output terminal of the RFIC chip 51B. I have.
  • the matching circuit 51C includes a first coil pattern 51Ca, a second coil pattern 51Cb, a third coil pattern 51Cc, a fourth coil pattern 51Cd, and each interlayer connection conductor.
  • the matching circuit 51C functions to match the impedance between the RFIC chip 51B and the radiating element 52 and the ground conductor 53.
  • the RFIC chip 51B is activated by receiving a current induced by the reception. Further, the activated RFIC chip 51B generates a high-frequency signal, and outputs the generated signal to the outside as a radio wave via the radiating element 52 and the ground conductor 53.
  • the radiation element 52 and the ground conductor 53 are partially formed in a meander shape. Thereby, the length in the longitudinal direction can be compressed while maintaining the entire electrical length.
  • the end 53a of the ground conductor 53 is configured to be capacitively coupled to the tag mounting surface 3A of the rack storage device 3 respectively.
  • the radiating element 52 is designed to have an electrical length longer than that of the ground conductor 53. Note that the present invention is not limited to this, and the ground conductor 53 may be designed so that the electrical length is longer than the radiating element 52.
  • the RFIC element 51, the radiating element 52, and the ground conductor 53 are provided on the base 54.
  • the base material 54 is a rectangular thin plate and has a uniform thickness.
  • the end 52a of the radiating element 52 and the end 53a of the ground conductor 53 are both configured to be capacitively coupled to the tag mounting surface 3A of the rack storage device 3 via the base material 54.
  • the substrate 54 is made of, for example, a dielectric material having a low dielectric constant of 10 or less.
  • the base material 54 is made of, for example, a flexible dielectric material such as polyethylene terephthalate (PET), a fluorine-based resin, a urethane-based resin, and paper.
  • FIG. 6A is a schematic configuration diagram illustrating an example of the reader / writer antenna 4.
  • FIG. 6B is a schematic diagram of a matching circuit unit provided in the reader / writer antenna 4 of FIG. 6A.
  • FIG. 7A is a plan view of a matching circuit unit included in the reader / writer antenna 4 of FIG. 6A.
  • FIG. 7B is a sectional view taken along line A1-A1 of FIG. 7A.
  • FIG. 7C is an equivalent circuit diagram of a matching circuit unit included in the reader / writer antenna 4 of FIG. 6A.
  • the reader / writer antenna 4 includes a cable-shaped main body 41 formed of a coaxial cable.
  • the cable-shaped main body 41 has an inner conductor 44 which is an example of a first conductor, and an outer conductor 45 which is an example of a second conductor provided along the inner conductor 44.
  • the internal conductor 44 is a linear conductor having one end connected to the power supply unit 46 and extending from one end to the other end.
  • the power supply unit 46 is built in the communication module 42 shown in FIGS.
  • the outer conductor 45 is a tubular conductor extending from one end to the other end along the inner conductor 44 so as to cover the inner conductor 44 via an insulator (not shown).
  • the reader / writer antenna 4 includes a matching circuit 47 provided at one end of the cable-shaped main body 41 and an external conductor 45 at a position away from the one end of the cable-shaped main body 41. And a magnetic body 48 provided along the outer peripheral surface.
  • the matching circuit unit 47 is connected to the other end of the internal conductor 44 and the other end of the external conductor 45 so as to match the impedance of the internal conductor 44 with the impedance of the external conductor 45. It works.
  • the matching circuit unit 47 includes a planar first conductor layer 471 connected to the internal conductor 44, a via-hole conductor 472, and a planar second conductor layer 472 as an example of the “electrode pattern”. And two conductor layers 473.
  • the first conductor layer 471 and the second conductor layer 473 have a width wider than the outer diameter of the outer conductor 45 and extend along the direction in which the inner conductor 44 extends.
  • the first conductor layer 471 and the second conductor layer 473 are provided to face each other with an insulator 474 interposed therebetween, and are connected to each other by two via-hole conductors 472.
  • the length of the second conductor layer 473 in the extending direction of the cable-shaped main body 41 is longer than that of the first conductor layer 471. Thereby, a part of the second conductor layer 473 and the external conductor 45 are provided so as to face each other with the insulator 474 interposed therebetween.
  • FIG. 7B in order to show both the via-hole conductor 472 and the internal conductor 44 in a cross section, the cut surface is shifted in the middle for convenience as shown by the line A1-A1 in FIG. 7A.
  • the inner conductor 44 is electrically connected to the first conductor layer 471.
  • the first conductor layer 471 is electrically connected to the second conductor layer 473 via two via-hole conductors 472.
  • the second conductor layer 473 is connected to the external conductor 45 by capacitive coupling having a capacitor component 475 via an insulator 474. That is, as shown in FIG. 7C, the inner conductor 44 and the outer conductor 45 are connected via the matching circuit unit 47 having the capacitor component 475 and the inductor component 476.
  • the magnetic body 48 is made of, for example, ferrite. As shown in FIG. 6A, the magnetic body 48 functions to separate the reader / writer antenna 4 into a radiating section 61 that performs wireless communication with the RFID tag 5 and a non-radiating section 62 that does not communicate with the RFID tag 5. I do. That is, the radiating portion 61 extends from one end of the cable-shaped main body 41 to the magnetic body 48. The non-radiating portion 62 extends from the magnetic body 48 to the other end of the cable-shaped main body 41. The non-radiating portion 62 functions as a shield member. The other end of the cable-shaped main body 41 is connected to the power supply section 46. The external conductor 45 is connected to the ground so as to be electrically stable.
  • the reader / writer antenna 4 is an antenna using a standing wave generated in the external conductor 45, and is not a loop antenna using a so-called induced magnetic field.
  • the detection area (radio wave area) of the reader / writer antenna 4 is limited to about 1 m or less.
  • the frequency characteristics do not change much.
  • the reader / writer antenna 4 can be relatively freely arranged two-dimensionally or three-dimensionally. Since the reader / writer antenna 4 is formed in a cable shape, the detection range of the reader / writer antenna 4 can be adjusted according to the length of the reader / writer antenna 4.
  • the matching circuit section 47 is provided on the matching circuit board 43 shown in FIGS.
  • the matching circuit board 43 has a second conductor layer 473 which is an electrode pattern formed on the facing surface OS facing the external conductor 45 via the insulator 474.
  • the matching circuit board 43 is directly or indirectly attached to the upper inner surface 21A via a spacer such that the second conductor layer 473 intersects the upper inner surface 21A of the housing 21 which is a metal surface.
  • the matching circuit board 43 is attached to the upper inner surface 21A where the angle formed by the second conductor layer 473 with respect to the upper inner surface 21A is in a range of 45 degrees or more and 135 degrees or less.
  • the matching circuit board 43 is attached to the upper inner surface 21A such that the second conductor layer 473 is orthogonal or substantially orthogonal to the upper inner surface 21A.
  • the second conductor layer 473 is provided at a predetermined distance or more from a metal surface different from the upper inner surface 21A to which the matching circuit board 43 is attached. For example, when a metal door is provided on the front surface (the right side in FIG. 3) of the housing 21, the second conductor layer 473 is provided at a distance of 5 cm or more from the door.
  • the matching circuit board 43 is attached to the upper inner surface 21A so that the second conductor layer 473 intersects the upper inner surface 21A which is a metal surface, the second conductor layer 473 and the upper inner surface 21A Can be made smaller. Thereby, it is possible to suppress generation of a capacitance component between the second conductor layer 473 and the upper inner surface 21A. As a result, a decrease in the antenna characteristics of the reader / writer antenna 4 can be suppressed.
  • the matching circuit board 43 is attached to the upper inner surface 21A so that the second conductor layer 473 is orthogonal or substantially orthogonal to the upper inner surface 21A, the second conductor layer 473 and the upper inner surface 21A. It is possible to further suppress the generation of a capacitance component between the capacitor and the capacitor 21A. As a result, the deterioration of the antenna characteristics of the reader / writer antenna 4 can be further suppressed.
  • the cable-shaped main body portion 41 is disposed so as to extend in the up-down direction Z along the inner side surface 21C of the housing 21, and the matching circuit board 43 is connected to the upper inner surface 21A of the housing 21 or It is attached to the lower inner surface 21B.
  • the plurality of RFID tags 5 arranged in the housing 21 can be efficiently read by one reader / writer antenna 4, and the length of the reader / writer antenna 4 can be further reduced.
  • the second conductor layer 473 is provided at a predetermined distance or more away from the metal surface different from the upper inner surface 21A to which the matching circuit board 43 is attached. The influence from the metal surface can be suppressed. As a result, the deterioration of the antenna characteristics of the reader / writer antenna 4 can be further suppressed.
  • the RFID tag 5 is attached such that the radiating element 52 projects from the rack storage device 3 in the insertion / extraction direction X, and at least a part of the ground conductor 53 faces the tag attachment surface 3A. ing.
  • the tag mounting surface 3A is made of a conductor such as a metal
  • the conductor can be used as a booster antenna, and the antenna gain can be improved. That is, according to the configuration, the RFID tag 5 can be read more reliably without depending on the material of the surface of the rack storage device 3. Further, since the RFID tag 5 is not attached to the front or back of the rack storage device 3 where the interface is usually provided, the visibility of the interface can be prevented from lowering, and the connection of the wiring to the interface is not hindered.
  • the RFID tag 5 and the cable-shaped main body 41 are arranged inside the housing 21 so as to be biased toward the upstream side in the insertion / removal direction X. According to this configuration, the RFID tags 5 of the plurality of rack storage devices 3 can be more reliably read by one reader / writer antenna 4.
  • the cable-shaped main body 41 is provided at a position overlapping with the radiating element 52 of the RFID tag 5 in a side view as viewed from a lateral direction orthogonal to the insertion / extraction direction X and the vertical direction Z. ing. According to this configuration, the RFID tags 5 of the plurality of rack storage devices 3 can be more reliably read by one reader / writer antenna 4.
  • the matching circuit board 43 is attached to the upper inner surface 21A of the housing 21, but the present invention is not limited to this.
  • the matching circuit board 43 may be attached to the lower inner surface 21 ⁇ / b> B of the housing 21. Further, the matching circuit board 43 may be attached to the inner side surfaces 21C and 21D of the housing 21. Further, the matching circuit board 43 is not limited to being mounted on the inner surface of the housing 21, but may be mounted on a metal surface provided in the housing 21. For example, when the server rack 2 has a metal partition, the matching circuit board 43 may be attached to the partition.
  • the “metal surface” is not limited to a flat surface, and may be, for example, a mesh surface.
  • the matching circuit board 43 is attached so that the longitudinal direction is along the upper inner surface 21A as shown in FIG. 1, but the present invention is not limited to this.
  • the matching circuit board 43 may be attached so that the short direction is along the upper inner surface 21A.
  • the plurality of rack storage devices 3 are arranged in the vertical direction Z, but the present invention is not limited to this.
  • the plurality of rack storage devices 3 may be arranged in the horizontal direction Y.
  • the cable-shaped main body 41 may be attached to the inner surface of the housing 21 so as to extend in the horizontal direction Y.
  • the tag mounting surface 3A of the rack storage device 3 is made of a conductor such as a metal, but the present invention is not limited to this.
  • the tag attachment surface 3A may be a surface in which a conductor such as a metal is coated with a resin.
  • the tag mounting surface 3A of the rack storage device 3 is the upper surface of the rack storage device 3 as shown in FIGS. 1 to 3, but the present invention is not limited to this.
  • the tag mounting surface 3A of the rack storage device 3 may be any surface that is parallel to the insertion / extraction direction X.
  • the tag attachment surface 3A is the bottom surface of the rack storage device 3, and the RFID tag 5 may be attached to the bottom surface.
  • the tag mounting surface 3A is a side surface of the rack storage device 3, and the RFID tag 5 may be mounted on the side surface.
  • the cable-shaped main body 41 when the cable-shaped main body 41 is positioned on an extension of the RFID tag 5 in the extending direction, it becomes difficult for the cable-shaped main body 41 to read the information of the RFID tag 5. For this reason, it is preferable that the cable-shaped main body 41 be provided at a position that does not overlap with the RFID tag 5 in a front view as viewed from the insertion / extraction direction X.
  • the cable-shaped main body 41 of the reader / writer antenna 4 is configured by a coaxial cable, but the present invention is not limited to this.
  • the cable-shaped main body 41 is provided along a strip-shaped insulator, a strip-shaped first conductor provided along one main surface of the insulator, and along the other main surface of the insulator. It may be constituted by a flat cable including a band-shaped second conductor.
  • the RFID tag can be read more reliably without depending on the material of the surface of the rack storage device.
  • a plurality of rack storage devices stored inside a server rack installed in a data center can be used. This is useful for an RFID system that manages devices using an RFID tag.

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  • Near-Field Transmission Systems (AREA)

Abstract

La présente invention concerne un système d'identification par radiofréquence (RFID) qui est un système RFID comprenant : des étagères ayant une surface métallique à l'intérieur d'un boîtier ; un dispositif de stockage d'étagère stocké à l'intérieur du boîtier pour pouvoir être introduit/extrait dans une direction d'introduction/extraction ; un élément RFID ayant une paire d'électrodes de borne ; une étiquette RFID comprenant un élément de rayonnement connecté à une électrode de borne de la paire d'électrodes de borne et un conducteur de masse connecté à l'autre électrode de borne de la paire d'électrodes de borne ; et une antenne de lecture/écriture en forme de câble qui est câblée à l'intérieur du boîtier et peut communiquer de manière sans fil avec l'étiquette RFID. Le dispositif de stockage d'étagère a une surface d'installation d'étiquette qui est parallèle à la direction d'introduction/extraction. L'étiquette RFID est installée de telle sorte que l'élément de rayonnement fait saillie à partir du dispositif de stockage d'étagère dans la direction d'introduction/extraction et au moins une partie du conducteur de masse fait face à la surface d'installation d'étiquette.
PCT/JP2019/006189 2018-07-30 2019-02-20 Système d'identification par radiofréquence (rfid) et dispositif de stockage d'étagère ayant une étiquette rfid installée WO2020026482A1 (fr)

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JP2019536998A JP6590131B1 (ja) 2018-07-30 2019-02-20 Ｒｆｉｄシステム

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JP2018-142807 2018-07-30
JP2018142807 2018-07-30

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070205894A1 (en) * 2006-03-01 2007-09-06 Sun Microsystems, Inc. Radio frequency identification for asset management
US20120211397A1 (en) * 2008-04-09 2012-08-23 Dieter Kilian Container for Receiving Articles
CN202486829U (zh) * 2011-12-13 2012-10-10 无锡互惠信息技术有限公司 一种基于射频识别的数据中心智能管理系统
JP2016062576A (ja) * 2014-09-22 2016-04-25 大日本印刷株式会社 Ｉｃタグラベル
WO2018012427A1 (fr) * 2016-07-14 2018-01-18 株式会社村田製作所 Étiquette d'attention pour article de vente au détail et article de vente au détail muni de celle-ci
WO2018043012A1 (fr) * 2016-08-31 2018-03-08 株式会社村田製作所 Support pour présentoir de marchandises et système de gestion de marchandises

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070205894A1 (en) * 2006-03-01 2007-09-06 Sun Microsystems, Inc. Radio frequency identification for asset management
US20120211397A1 (en) * 2008-04-09 2012-08-23 Dieter Kilian Container for Receiving Articles
CN202486829U (zh) * 2011-12-13 2012-10-10 无锡互惠信息技术有限公司 一种基于射频识别的数据中心智能管理系统
JP2016062576A (ja) * 2014-09-22 2016-04-25 大日本印刷株式会社 Ｉｃタグラベル
WO2018012427A1 (fr) * 2016-07-14 2018-01-18 株式会社村田製作所 Étiquette d'attention pour article de vente au détail et article de vente au détail muni de celle-ci
WO2018043012A1 (fr) * 2016-08-31 2018-03-08 株式会社村田製作所 Support pour présentoir de marchandises et système de gestion de marchandises

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