JP2009217670A - Rfid tag and management system using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress damage of an RFID tag, with respect to the RFID tag and a management system using the RFID tag. <P>SOLUTION: The RFID tag is provided with antennas 25 and 26, and a control element mounted on a control element mounting part 27 of the antennas 25 and 26. In the antennas 25 and 26, one end side is connected to the control element mounting part 27, and the other side is configured to have a plurality of short-circuited draw-out parts 25a, 25b, 26a and 26b and extension parts 25c and 26c extending from the draw-out parts 25a, 25b, 26a and 26b, so that damage of the RFID tag 2 is suppressed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an RFID tag used for production management, physical distribution management, article management, and the like, and a management system using the same.

  Since the RFID tag has a control element capable of storing individual identification information, a management system for performing production management, physical distribution management, article management, etc. using the RFID tag has been proposed.

That is, if the RFID tag is attached to the managed article, the location of each managed article can be confirmed by communication between the controller and the RFID tag, so that the management of the managed article is greatly improved. It is. In addition, there exists the following patent document 1 as prior literature similar to this, for example.
JP 2005-227818 A

  The problem with the above-described conventional example is that when the managed article to which the RFID tag is attached is, for example, laundry, the RFID tag is damaged due to overload applied during washing or ironing. .

  In other words, even if a cleaning company uses RFID tags for the management of the laundry, the management is very efficient. Sometimes, a load such as repeated bending stress, pressurization, and heating is applied to the RFID tag.

  Here, the RFID tag includes an antenna and a control element mounted on the control element mounting portion of the antenna. The antenna has one end connected to the control element mounting portion and the other end extended outward. It was a structure.

  And in such a structure, when a load such as repeated bending stress, pressurization, heating, etc. is applied, the stress is concentrated on the connection part to the control element mounting part, particularly on one end side of the antenna, or the disconnection occurs at this part. It occurred frequently and as a result, the RFID tag was damaged.

  In view of the above, an object of the present invention is to suppress damage to an RFID tag.

  In order to achieve this object, the present invention includes an antenna and a control element mounted on the control element mounting portion of the antenna. The antenna has one end connected to the control element mounting portion and the other end shorted. In addition, a structure having a plurality of lead portions and an extension portion extended from the lead portions is achieved, thereby achieving the intended purpose.

  As described above, the present invention includes an antenna and a control element mounted on the control element mounting portion of the antenna, and the antenna has a plurality of lead portions whose one end side is connected to the control element mounting portion and whose other end side is short-circuited. And an extension portion extended from the lead-out portion, damage to the RFID tag can be suppressed.

  That is, the RFID tag of the present invention has an antenna structure in which one end side is connected to the control element mounting portion and the other end side is short-circuited, and a plurality of lead portions are extended from the lead portion. Therefore, since there are a plurality of antenna lead-out portions that are easily disconnected by a load, this disconnection is unlikely to occur, and as a result, damage to the RFID tag can be suppressed.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

(Embodiment)
In FIG. 1, reference numeral 1 denotes a management article such as a laundry collected by a cleaning company, for example. This management article 1 is not shown, but is subsequently put into a washing machine by a cleaning company and then ironed.

  In the present embodiment, the managed article 1 is a laundry as described above, and is collected from an unspecified number. However, since many managed articles 1 are put into the washing machine at the time of washing, Management becomes very complicated.

  Therefore, in the present embodiment, as shown in FIG. 1, the RFID tag 2 is detachably attached to each managed article 1 using, for example, a safety pin (not shown) (actually, on the back side of clothes) (To facilitate understanding, it is attached to the surface of the garment in FIG. 1).

  As shown in FIG. 2, a control element 3 is mounted on the RFID tag 2 affixed to each managed article 1, and the control element 3 includes a storage unit 3a for storing individual identification information.

  The RFID tag 2 attached to each managed article 1 is stored in the control element 3 at the time of reception of individual identification information (for example, customer name, laundry category, request date, etc.) for each managed article 1 to which the RFID tag 2 is attached. It is stored in the unit 3a, and for example, “where is the laundry D of the customer C” is managed.

  The controller 4 shown in FIG. 1 performs the management, and this controller 4 communicates with the RFID tag 2 through the reader / writer 5 and stores the individual identification information stored in the storage unit 3a provided therein. Read and manage.

  FIG. 2 shows an electrical block diagram of the reader / writer 5 of the controller 4 and the RFID tag 2. First, in accordance with an instruction from the controller 4, a plurality of items after washing and ironing from the control unit 6 of the reader / writer 5. An inquiry is made to each RFID tag 2 of the managed article 1, for example, "Does customer C's laundry D exist?"

  The inquiry signal modulates a 953 MHz carrier wave by the modulation circuit 7 and is output to the RFID tag 2 of each managed article 1 via the transmission circuit 8 and the antenna 9.

  Each RFID tag 2 receives an inquiry signal at its antenna unit 10, and a diode 11 and a capacitor 12 generate a DC voltage from a carrier wave of the signal from the antenna 9, and the generated DC voltage causes the control circuit 13 to demodulate. The circuit 14, the modulation circuit 15, and the storage unit 3a are activated.

  Then, in response to an instruction from the control circuit 13, the demodulator circuit 14 demodulates the inquiry “Does the customer D have the laundry D?” From the received signal.

  Further, the control circuit 13 hears the individual identification information stored in the storage unit 3a simultaneously with the instruction to the demodulation circuit 14.

  In response to the inquiry, the control circuit 13 of the RFID tag 2 attached to the management article 1 whose individual identification information stored in the storage unit 3a is “the laundry D of the customer C” is “the laundry of the customer C”. It is answered that the switch 16 is turned ON / OFF via the modulation circuit 15.

  That is, if the switch 16 is turned on, the point a of the antenna unit 10 and the point b of the ground unit 17 are short-circuited, and conversely, if the switch 16 is turned off, the point a of the antenna unit 10 and b of the ground unit 17 are. As a result of the repeated pattern of ON and OFF of the switch 16 as described above, the conclusion is that “the customer D is laundry D” from the antenna unit 10 of the RFID tag 2 to the antenna 18 of the reader / writer 5. To report.

  In the reader / writer 5, the reply signal is transmitted to the demodulating circuit 20 through the receiving circuit 19, and the control unit 6 confirms the presence of “the laundry D of the customer C” by the demodulated signal and reports it to the controller 4. Will do.

  Further, in response to an instruction from the controller 4, the control unit 6 of the reader / writer 5 asks the RFID tag 2 that "there is the laundry D of the customer C?" When there is no RFID tag 2 storing “Mr. C's laundry D”, there is no reply, so the controller 4 starts from “No reply” and “Mr. C ’s laundry D” changes to this location ( For example, it is confirmed that it does not exist in the drying area.

  In FIG. 2, 21 indicates a power supply circuit, 22 indicates a clock circuit, and 23 indicates a matching capacitor.

  The RFID tag 2 as described above has a configuration as shown in FIG.

  FIG. 3 is a front view of the RFID tag 2. As shown in FIG. 3, the RFID tag 2 according to the present embodiment includes left and right antennas 25 sealed in a watertight manner in two sheets 24 on the front and back surfaces. , 26 (each constituting a λ / 4 type antenna) and the control mounted between the first connection terminal 27a and the second connection terminal 27b of the control element mounting portion 27 of the antenna 25, 26. Element 3 (FIG. 2) is provided.

  Each of the antennas 25 and 26 has a plurality of lead portions 25a and 25b whose one end side is connected to the control element mounting portion 27 and whose other end side is short-circuited by the short-circuit portions A and B, and lead portions 26a and 26b. Extension portions 25c and 26c extended from the short-circuit portions A and B in the left and right outer directions.

  The first connecting terminal 27a, the first connecting terminal 27a of the control element mounting portion 27, the leading portions 25a and 25b of the antenna 25 connected to the second connecting terminal 27b, and the leading portions 26a and 26b of the antenna 26. A square matching circuit 28 having an opening between the second connection terminals 27b is formed.

  Further, the lead portions 25a and 25b and the lead portions 26a and 26b connected to the matching circuit 28 have a wider line width than the extension portions 25c and 26c side of the lead portions 25a and 25b and the lead portions 26a and 26b, Increases strength against load.

  Further, the antenna extensions 25c and 26c provided on both sides of the control element mounting portion 27 are in a meander shape as shown in FIG. 3, but the extensions 25c and 26c on both sides are point-symmetrical to provide directivity symmetry. Secured.

  As described above, the RFID tag 2 according to the present embodiment has two lead portions 25a and 25b of the left and right antennas 25 and two lead portions 26a and 26b of the antenna 26, and has a frame shape in which the other ends are short-circuited. Therefore, it is difficult to disconnect by the load, and thus damage as the RFID tag 2 is suppressed.

  The lead portions 25a and 26b are linear, and the lead portions 25b and 26a are bent to form a frame shape.

  Further, by providing two extraction portions 25a and 25b of the left and right antennas 25 and two extraction portions 26a and 26b of the antenna 26, two paths are formed in each of the antennas 25 and 26. Can be achieved.

  As described above, the present invention includes an antenna and a control element mounted on the control element mounting portion of the antenna, and the antenna has a plurality of lead portions whose one end side is connected to the control element mounting portion and whose other end side is short-circuited. And an extension portion extended from the lead-out portion, damage to the RFID tag can be suppressed.

  That is, the RFID tag of the present invention has an antenna structure in which one end side is connected to the control element mounting portion and the other end side is short-circuited, and a plurality of lead portions are extended from the lead portion. Therefore, since there are a plurality of antenna lead-out portions that are easily disconnected by a load, this disconnection is unlikely to occur, and as a result, damage to the RFID tag can be suppressed.

  Therefore, it is expected to be widely used in management systems such as production management, distribution management, and article management.

The perspective view which shows the management system of embodiment of this invention Electrical block diagram of the management system Front view of RFID tag used in the management system

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Managed article 2 RFID tag 3 Control element 3a Memory | storage part 4 Controller 5 Reader / writer 6 Control part 7,15 Modulation circuit 8 Transmission circuit 9, 18, 25, 26 Antenna 10 Antenna part 11 Diode 12, 23 Capacitor 13 Control circuit 14 , 20 Demodulation circuit 16 Switch 17 Ground part 19 Reception circuit 21 Power supply circuit 22 Clock circuit 24 Sheet 25a, 25b, 26a, 26b Lead part 25c, 26c Extension part 27 Control element mounting part 27a First connection terminal 27b Second connection Terminal A, B Short circuit 28 Matching circuit

Claims (6)

The antenna includes a control element mounted on a control element mounting portion of the antenna, and the antenna includes a plurality of lead portions having one end side connected to the control element mounting portion and the other end side short-circuited, and the lead portion RFID tag having an extension portion extended from the RFID tag. The RFID tag according to claim 1, wherein a control element is connected between the first and second connection terminals of the control element mounting portion, and an antenna is connected to each of the first and second connection terminals. 3. A square-shaped matching circuit having an opening between the first and second connection terminals is formed at an antenna lead portion connected to the first and second connection terminals of the control element mounting portion. The described RFID tag. The RFID tag according to any one of claims 1 to 3, wherein a lead portion connected to the matching circuit has a wider line width than an extension portion side of the lead portion. The RFID tag according to any one of claims 2 to 4, wherein the extended portions of the antenna provided on both sides of the control element mounting portion have a meander shape, and the extended portions on both sides have a point-symmetric shape. A management system comprising the RFID tag according to claim 1 and a controller that communicates with the RFID tag.

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