JP2009187319A - Rfid inspection system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a communication error due to a reflected electric wave, and to stably inspect communication, in an RFID (Radio Frequency Identification) inspection system for inspecting the communication of an RFID of an IC tag, an IC label or the like. <P>SOLUTION: The RFID inspection system is formed of an electric wave absorbent material 18 in a hollow shape, and includes a reader/writer antenna part 15, an electric wave regular reflection part 20 formed around the reader/writer antenna part 15, an inspection opening part 19A for positioning the RFID 22A to be inspected, and a curved opening part electric wave reflection part 19 to reflect an electric wave from the reader/writer antenna part 15 regularly on the electric wave regular reflection part 20, which is arranged around the opening part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an RFID inspection system that performs communication inspection of RFID such as an IC tag and an IC label.

  In recent years, non-contact type IC tags, IC labels, and the like called RFID (Radio Frequency Identification) have rapidly spread, and their use is also wide-ranging. Such an RFID is formed on a continuous sheet for manufacturing efficiency and is individually inspected at a corresponding frequency by a reader / writer. Therefore, generation of interference waves due to reflection of radio waves is generated on the RFID to be inspected. It is necessary to perform stable communication while suppressing this.

  Conventionally, at the time of communication inspection of RFID formed on a continuous sheet, a shield member as proposed in the following patent document is provided as a method for suppressing generation of interference waves due to reflection of radio waves on the RFID to be inspected. It is known.

  Here, FIG. 9 shows a configuration explanatory diagram of a conventional IC card communication inspection apparatus. In FIG. 9, an IC card communication inspection apparatus 101 is provided with a radio wave absorber 103 on the inner wall of a metal shield box 102, an opening 104 is formed in a portion corresponding to the IC card to be inspected, and the shield box A reader / writer 105 is provided in 102, and a communication inspection is performed on the IC card 106 to be inspected conveyed to the opening 104 by the conveying belt 107 to determine whether the IC card 106 is good or bad. .

JP 2004-272437 A

  However, the IC card communication inspection apparatus 101 disclosed in the above patent document can absorb the radio wave to be reflected from the reader / writer 105 by the radio wave absorber 103 provided in the shield box 102. Since the radio wave absorber 103 is also present around the opening 104 where the IC card 106 to be inspected is located, the radio wave is absorbed in the surrounding area, and the stability of the communication state cannot be maintained. There's a problem.

  Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide an RFID inspection system capable of preventing a communication failure due to a reflected radio wave and enabling a stable communication inspection.

  In order to solve the above-described problems, the invention of claim 1 is an RFID inspection system in which a reader / writer communicates with an RFID including an IC module and an antenna to be inspected via an antenna unit to inspect the quality. The antenna unit is hollow and at least the inner wall is formed of a radio wave absorber. A radio wave regular reflection unit is provided around the antenna unit, and the RFID to be inspected is positioned. The inspection treatment is provided with a predetermined-shaped opening radio wave reflecting portion that is formed so that the radio wave from the antenna portion is reflected at an angle that causes regular reflection on the radio wave regular reflection portion. It is set as the structure which has a tool.

  The invention of claim 2 is an RFID inspection system in which a reader / writer communicates with an RFID including an IC module and an antenna to be inspected via an antenna unit to inspect whether the antenna unit is inside. A hollow shape and at least an inner wall is formed of a radio wave absorber, and an inspection opening for positioning the RFID to be inspected is formed, and the radio wave from the antenna unit is formed in the periphery of the inspection opening. The inspection jig is provided with an opening radio wave reflecting portion having a predetermined shape to be reflected so as to be incident.

The inventions of claims 3 and 4 are configured so that “the opening radio wave reflecting portion is formed in a curved shape or a linear shape with a predetermined angle on a cross section”,
“At least a radio wave absorber is provided above the RFID on the inspection jig”.

  According to the present invention, at least the inner wall is formed in a hollow shape by a radio wave absorber and the antenna part is located, and a radio wave regular reflection part is provided around the antenna part, and an inspection opening for positioning the RFID to be inspected is formed. In addition, an antenna radio wave reflection part having a predetermined shape for reflecting the radio wave from the antenna part to be incident at an angle at which the radio wave from the radio wave regular reflection part is regularly reflected to the radio wave reflection part is output from the antenna part Of the received radio waves, radio waves other than those reaching the RFID to be inspected are absorbed by the radio wave absorber 18 and the radio waves reflected by the opening radio wave reflection part are regularly reflected by the radio wave regular reflection part. Therefore, the interference state and the steady state can be prevented, so that it is possible to prevent communication failure due to reflected radio waves and to perform stable communication detection. Those which may be capable of.

  In addition, an inspection opening for positioning the RFID to be inspected is formed, and an opening radio wave reflection portion having a predetermined shape for reflecting the radio wave from the antenna unit to be incident on the radio wave absorber is provided around the inspection opening. Because the radio wave output from the antenna unit other than the radio wave reaching the RFID to be inspected is incident on the radio wave absorber including the radio wave reflected by the aperture radio wave reflection unit, communication failure due to the reflected radio wave is prevented. In addition to being able to prevent, stable communication inspection can be made possible. In particular, it is only necessary to provide a reflection portion around the conventional system inspection opening, which can be easily implemented.

Hereinafter, the best embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a configuration diagram of an RFID inspection system according to the present invention. FIG. 1A is a configuration diagram of an RFID inspection system, and FIGS. 1B and 1C are configuration diagrams of an inspection jig. In FIG. 1 (A), the RFID inspection system 11 takes up a continuous sheet (21, described with reference to FIG. 2) in which an RFID module having an IC module and an antenna on the surface is continuously provided from a continuous sheet supply unit 12. For example, the continuous sheet take-up unit 13 is conveyed by rotational driving (the continuous sheet supply unit 12 may be rotationally driven auxiliary), and the RFID detection unit 14 and the reader / writer antenna unit are included in the conveyance path. 15. A stamper 16 is arranged.

  The arrangement position of the reader / writer antenna unit 15 becomes the inspection position in the transport path, and the inspection jig 17 in which the reader / writer antenna unit 15 is positioned is arranged. That is, the continuous sheet supplied from the continuous sheet supply unit 12 is conveyed on the inspection jig 17 through the vicinity of the RFID detection unit 14, and conveyed by the continuous sheet winding unit 13 through the stamper 16. It becomes a route.

  The RFID detection unit 14 is a sensor that detects an RFID to be inspected for the RFID being conveyed. The reader / writer antenna unit 15 is located at the bottom of the inspection jig 17 (described later), and is used for communicating with RFID in an inspection determination unit (not shown), for example, and a conventional one can be used. Detailed description is omitted. The stamper 16 stamps an NG (for example, “x”) mark on the RFID that is determined to be defective as a result of the communication inspection.

  As shown in FIGS. 1B and 1C, the inspection jig 17 has a hollow box shape in which the reader / writer antenna portion 15 is located at the bottom, and at least an inner wall is formed of a radio wave absorber 18. (A shield material such as metal may be provided outside the radio wave absorber 18), a radio wave regular reflection unit 20 is provided around the reader / writer antenna unit 15, and an RFID (22A) to be inspected ) Is formed, and a curved opening radio wave is reflected to reflect the radio wave from the reader / writer antenna unit 15 at an angle at which the radio wave specular reflection unit 20 is regularly reflected to the periphery of the test aperture 19A. A reflection unit 19 is provided. The opening radio wave reflection unit 19 is set with a curvature that causes the radio wave output from the reader / writer antenna unit 15 to enter the outside of the inspection opening 19A so that the radio wave regular reflection unit 20 regularly reflects the radio wave.

  As the radio wave absorber 18, for example, a non-electrically conductive material such as rubber or resin, or a high electrical resistance body containing magnetic particles having soft magnetic properties such as ferrite can be applied. Further, the opening radio wave reflection part 19 and the radio wave regular reflection part 20 are preferably made of a metal material such as stainless steel, which is made of a conductive material capable of reflecting radio waves and suppressing transmission.

  In the present embodiment, the case where the inspection jig 17 has a hollow box shape has been described. However, the entire shape is not limited as long as it is at least a hollow shape. In addition, although the radio wave regular reflection portion 20 is illustrated as being fitted, it may be provided on the inner wall of the radio wave absorber 18. The same applies to the forms described below.

  Here, FIG. 2 shows an explanatory diagram of an example of an object to be inspected by the RFID inspection system of FIG. FIG. 2A is an explanatory view of a continuous sheet, and FIG. 2B is an explanatory view showing a state in which the continuous sheet is positioned on an inspection jig. As shown in FIG. 2A, for example, RFIDs 22 are continuously attached in a row on a continuous sheet 21 of polyethylene terephthalate (PET) so as to be peeled at predetermined intervals.

  For example, the RFID 22 is formed by bonding copper foil onto a PET with an epoxy-based adhesive and forming each planar antenna by etching, and forming an IC module (IC chip or a predetermined circuit on the IC chip) between the antennas. Is mounted by reflow soldering or conductive adhesive, and is determined by the predetermined frequency (RFID antenna shape, etc.) between the antenna and the reader / writer antenna unit 15. Here, as the UHF band Communication) is performed. The RFID 22 has a predetermined resonance frequency depending on the shape, length, etc. of the antenna section, and receives the signal by resonating in response to the radio wave of the corresponding frequency from the reader / writer antenna section 15.

  As shown in FIG. 2B, the continuous sheet 21 in which the RFID 22 is continuously provided is conveyed on the inspection opening 19A of the opening radio wave reflection section 19 of the inspection jig 17, and is detected by the RFID detection section 14. The communication inspection is performed when only the RFID 22A is positioned in the inspection opening 19A.

  FIG. 3 is an explanatory diagram of communication inspection using the inspection jig in FIG. In FIG. 3, the continuous sheet 21 in which the RFIDs 22 to be inspected are continuously provided has the RFID 22 </ b> A positioned on the inspection opening 19 </ b> A of the opening radio wave reflection part 19 in the inspection jig 17 as the inspection target. In the communication inspection, the RFID 22A to be inspected is received by resonating in response to the radio wave of the corresponding frequency (UHF band or HF band) from the reader / writer antenna unit 15, and is included in the radio wave from the reader / writer. In response to the command, data is transmitted from the RFID 22A, and pass / fail is determined.

  That is, the radio wave output from the reader / writer antenna unit 15 travels while spreading and travels directly to the RFID 22A to be inspected (inspection aperture 20A), and the radio wave reflected by the aperture radio wave reflector 19 due to other spreads. There are (reflected wave) 15B and a radio wave 15C absorbed by the radio wave absorber 18, and the radio wave 15B reflected by the opening radio wave reflection part 19 is specularly reflected by the radio wave regular reflection part 20 (regular reflection wave 15D).

  Further, when the reflected wave 15D incident on the radio wave regular reflection unit 20 is specularly reflected, the phase of the regular reflected wave 15D is reversed at this time, and the regular reflected wave 15D cancels the reflected wave 15B continuously incident. It becomes. Accordingly, the radio wave output from the reader / writer antenna unit 15 is in an interference state, that is, in a steady state, or absorbed by the radio wave absorber 18 except for the radio wave 15A traveling to the RFID 22A (inspection opening 20A) to be inspected. Thus, the reflected wave 15B, the radio wave 15C, and the regular reflected wave 15D are not incident on the RFID 22A (inspection opening 20A).

  In this way, radio waves other than those reaching the RFID 22A to be inspected among radio waves output from the reader / writer antenna unit 15 are absorbed by the radio wave absorber 18 and reflected by the opening radio wave reflection unit 19. Is regularly reflected by the radio wave regular reflection unit 20 and can be made to be in an interference state. As a result, it is possible to prevent a communication failure due to the reflected radio wave and to perform a stable communication inspection. It can be made to. If the effect of the first embodiment is compared with the second embodiment to be described later, the radio wave regular reflection unit 20 enables more stable communication inspection of the reflected radio waves that cannot be absorbed by the radio wave absorber 18. is there. This also applies to FIG.

  Next, FIG. 4 shows another configuration diagram of the inspection jig of FIG. In FIG. 4, the opening radio wave reflection part 19 is provided in a cross-sectional linear manner to reflect the radio wave from the reader / writer antenna unit 15 so that the radio wave is incident at an angle at which the radio wave regular reflection part 20 is specularly reflected. That is, the opening radio wave reflector 19 sets the linear section in an angle at which the radio wave output from the reader / writer antenna unit 15 is incident on the outside of the inspection aperture 19A so that the radio wave regular reflector 20 regularly reflects the radio wave. It is a thing. In this case, the radio wave regular reflection unit 20 may be set wider.

  Even when the opening radio wave reflector 19 is shaped as described above, radio waves other than those reaching the RFID 22A to be inspected out of the radio waves output from the reader / writer antenna unit 15 are also absorbed by the radio wave absorber. 18, and the radio wave reflected by the opening radio wave reflection unit 19 is regularly reflected by the radio wave regular reflection unit 20, thereby causing an interference state, and thus a steady state. It is possible to prevent communication failure due to radio waves and to enable stable communication inspection.

  Next, FIG. 5 shows another configuration diagram of the communication inspection in FIG. In FIG. 5, a shield material 31 is disposed above a predetermined number of RFIDs 22 </ b> A, 22 on the continuous sheet 21 positioned on the inspection jig 17, and the inner surface on the RFID 22 </ b> A, 22 side is the same as the radio wave absorber 18. The radio wave absorber 32 is provided. In the figure, the case of a reverse concave shape is shown for efficiency, but a plate shape may be used if the size is set appropriately. The shield material 31 may be a metal material made of the same material as that of the inspection jig 17, for example.

  The shield material 31 can reflect the radio waves from outside and avoid the influence on the RFID 22A to be inspected, and the radio wave absorber 32 absorbs radio waves that have passed through the continuous sheet 21 between the RFIDs 22A and 22. The influence on the RFID 22A to be inspected can be avoided by preventing the reflection by passing through the other. In that sense, it is sufficient that the radio wave absorber 32 is provided at least, and the shield material 31 ensures reliability.

  As described above, by providing at least the radio wave absorber 32 above the RFIDs 22A and 22 on the inspection jig 17, it is possible to further prevent communication failure due to reflected radio waves with respect to the RFID 22A to be inspected, and to stabilize Communication inspection can be made possible.

  Next, FIG. 6 shows a configuration diagram of a second embodiment of the RFID inspection system of the present invention. In FIG. 6, the inspection jig 17 has a hollow box shape in which the reader / writer antenna portion 15 is located at the bottom, and at least the inner wall is formed by the radio wave absorber 18 as in the first embodiment. However, the opening wave reflection part 19 in which the inspection opening part 19A for positioning the RFID 22A to be inspected is reflected to reflect the radio wave from the reader / writer antenna part 15 so as to be incident on the radio wave absorber 18. In this shape, the reader / writer antenna unit 15 is formed at a predetermined angle.

  That is, the opening radio wave reflecting unit 19 absorbs the radio wave absorbing material 18 on the reader / writer antenna unit 15 side from the radio wave output from the reader / writer antenna unit 15 other than the radio wave reaching the RFID 22A to be inspected. It is set by the curvature to make it. Therefore, the radio wave regular reflection part 20 in the inspection jig 17 of the first embodiment is not necessary.

  Even when the opening radio wave reflection part 19 is shaped as described above, the radio wave output from the reader / writer antenna unit 15 other than the radio wave that reaches the RFID 22A to be inspected is generated by the opening radio wave reflection part 19. Since the reflected radio wave 15B including the reflected radio wave 15B is absorbed by the radio wave absorber 18, a communication failure due to the reflected radio wave can be prevented and a stable communication inspection can be performed.

  Next, FIG. 7 and FIG. 8 show other configuration diagrams of the inspection jig of FIG. 7 and 8, similarly to the above, radio waves other than those reaching the RFID 22A to be inspected among the radio waves output from the reader / writer antenna unit 15 are reflected by the opening radio wave reflection unit 19. Since the radio wave absorber 18 including the radio wave 15B is absorbed, it is possible to prevent communication failure due to the reflected radio wave and to enable a stable communication inspection. In particular, it is only necessary to provide a reflection portion around the conventional system inspection opening, which can be easily implemented.

  That is, in FIG. 7A, the radio wave from the reader / writer antenna unit 15 is made incident on the radio wave absorber 18 through the aperture radio wave reflection unit 19 in which the test aperture 19A for positioning the RFID 22A to be inspected is formed. The cross section is linearly reflected and formed at a predetermined angle on the reader / writer antenna unit 15 side. In other words, the opening radio wave reflection unit 19 absorbs the radio waves 15B and 15C incident on the reader / writer antenna unit 15 side other than the radio wave 15A reaching the RFID 22A to be inspected among the radio waves output from the reader / writer antenna unit 15. The angle is set to be absorbed by the material 18.

  In FIG. 7B, the radio wave from the reader / writer antenna unit 15 is incident on the radio wave absorber 18 through the radio wave reflection unit 19 formed with the test aperture 19A for positioning the RFID 22A to be inspected. It is formed in a horizontal state with respect to the reader / writer antenna unit 15 with a linear shape in cross section to be reflected as much as possible. That is, the radio wave absorber 18 absorbs the incident radio waves 15B and 15C other than the radio wave 15A reaching the RFID 22A to be inspected among the radio waves output from the reader / writer antenna unit 15. In the present invention, the predetermined angle is a concept including the horizontal position.

  Further, FIG. 8 shows that the opening radio wave reflector 19 in which the inspection aperture 19A for positioning the RFID 22A to be inspected is reflected so that the radio wave from the reader / writer antenna unit 15 is incident on the radio wave absorber 18. It has a linear cross section and is formed at a predetermined angle on the RFID 22A side to be inspected. That is, the opening radio wave reflection unit 19 is incident on the inspection target RFID 22A side (outside the inspection opening 19A) other than the radio wave 15A reaching the inspection target RFID 22A among the radio waves output from the reader / writer antenna unit 15. The angle is set so that the radio wave absorbers 18 can absorb the radio waves 15B and 15C.

  The RFID inspection system of the present invention can be used for communication inspection performed in the RFID manufacturing process or at the user acceptance stage after shipment.

It is a block diagram of 1st Embodiment of the RFID test | inspection system in this invention. It is explanatory drawing of an example of the object test | inspected with the RFID test | inspection system of FIG. It is explanatory drawing of the communication test | inspection by the test jig | tool in FIG. It is another block diagram of the inspection jig of FIG. It is another block diagram of the communication test | inspection in FIG. It is a block diagram of 2nd Embodiment of the RFID test | inspection system in this invention. It is another block diagram (1) of the jig | tool for an inspection of FIG. It is another block diagram (2) of the inspection jig of FIG. It is structure explanatory drawing of the conventional IC card communication inspection apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 RFID inspection system 12 Continuous sheet supply part 13 Continuous sheet winding part 14 RFID detection part 15 Reader / writer antenna part 16 Stamper 17 Inspection jig 18 Radio wave absorber 19 Radio wave reflection part 19A Inspection opening part 20 Flat radio wave reflection part 21 Continuous sheet 22 RFID
31 Shield part 32 Radio wave absorption part

Claims (4)

An RFID inspection system in which a reader / writer communicates with an IC module to be inspected and an RFID including an antenna via an antenna unit to inspect the quality.
Inspection in which the antenna unit is hollow and at least an inner wall is formed of a radio wave absorber, a radio wave regular reflection unit is provided around the antenna unit, and the RFID to be inspected is positioned An inspection jig in which an opening is formed, and a radio wave reflection part having a predetermined shape is provided around the periphery of the opening to reflect the radio wave from the antenna unit at an angle at which the radio wave is regularly reflected with respect to the radio wave regular reflection unit. An RFID inspection system comprising: An RFID inspection system in which a reader / writer communicates with an IC module to be inspected and an RFID including an antenna via an antenna unit to inspect the quality.
A hollow shape in which the antenna portion is located and at least an inner wall is formed of a radio wave absorber, and an inspection opening for positioning the RFID to be inspected is formed, and a radio wave from the antenna portion is formed around the opening. An RFID inspection system comprising an inspection jig provided with an opening radio wave reflecting portion having a predetermined shape that reflects light so as to be incident on the radio wave absorber.   3. The RFID inspection system according to claim 1, wherein the opening radio wave reflecting portion is formed in a curved shape or a linear shape having a predetermined angle on a cross section.   4. The RFID inspection system according to claim 1, wherein at least a radio wave absorber is provided above the RFID on the inspection jig.

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