JP2005165839A - Reader/writer, ic tag, article control device, and optical disk device - Google Patents

Reader/writer, ic tag, article control device, and optical disk device Download PDF

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Publication number
JP2005165839A
JP2005165839A JP2003406003A JP2003406003A JP2005165839A JP 2005165839 A JP2005165839 A JP 2005165839A JP 2003406003 A JP2003406003 A JP 2003406003A JP 2003406003 A JP2003406003 A JP 2003406003A JP 2005165839 A JP2005165839 A JP 2005165839A
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Prior art keywords
tag
writer
reader
rod
antenna
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JP2003406003A
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Japanese (ja)
Inventor
Nobuhiko Ido
Toshihiro Kojima
Daisuke Saito
伸彦 井土
敏宏 小島
大介 斎藤
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Nippon Signal Co Ltd:The
日本信号株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a reader/writer that eliminates the interference between tags and influence due to electromagnetic wave disturbance by a metal of an article, on which an IC tag is attached by making the antenna of the reader/writer bar-shaped and opening the center of a loop antenna of the IC tag attached to the article. <P>SOLUTION: The optical disk control device 300 is constituted of a computer 150, that is located outside and controls the whole system by communicating data to the reader/writer 100, the reader/writer 100 that performs transmission of a conveyance power, based on a predetermined modulation method and communication of data with the IC tag 200 in a non-contact manner, the bar-shaped antenna 9 having generally the same diameter as the shaft hole of the optical disk, a plurality of optical disks 400 equipped with the IC tag 200, and a holder 57 that holds the bar-shaped antenna 9 and the plurality of optical disks 400. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a reader / writer for a non-contact IC tag, and more particularly to technical means for avoiding radio wave interference caused by metal.

In recent years, new information recording media called IC cards are widely available on the market. The IC card is a generic name for cards having a card-like or sheet-like shape such as a credit card, a bank card, a point card, etc., and an IC (Integrated Circuit) incorporated in the card. Recently, an IC tag as an applied product of an IC card is attached to various articles and contributes to the efficiency of inventory management and the like. Since such IC cards and IC tags exchange data with reader / writers by radio waves, there is a particular problem that does not occur particularly with IC cards that are processed in units such as commuter passes. Have.
That is, when the product is an optical disc such as a CD or DVD, a metal foil for reflecting laser light is formed on the information recording area of the recording medium. When an IC tag is attached on the metal foil, the metal foil removes the reader / writer from the reader / writer. There is a problem in that the radio waves of the IC tag do not reach the required magnetic field for the operation of the IC tag due to reflection and attenuation, and information cannot be read and written accurately. If the IC tag is attached to the corner of the optical disk case so that it does not overlap the metal foil, information can be read and written in units of one sheet. However, because the case and optical disk are separate, reading and writing are not necessarily done from the IC tag. There is no guarantee that the information to be recorded matches the recording information of the optical disc body.
In addition, in order to solve the problem that radio waves are reflected by the metal foil and the information cannot be read and written accurately, a magnetic sheet is provided between the IC tag and the metal, thereby forming a magnetic path and reading the tag information. There is technology. However, when an IC tag is loaded, the magnetic flux passes only outside and the magnetic flux does not pass inside, so that the problem remains that the inner tag cannot communicate.
Further, as a conventional technique, Japanese Patent Application Laid-Open No. 2003-59177 discloses the protection management of confidential information by preventing unauthorized use, leakage of confidential information, or personal authentication with respect to information such as reproducible music and images recorded on a computer recording medium. The technique to perform is disclosed. According to this, when reading and reproducing information from an RFID-equipped computer recording medium in which identification information is recorded on the RFID and the computer recording medium, the computer reads the identification information from the recording medium and the RFID, and the identification information of both Discloses a program for realizing a function of reading and reproducing information recorded on the recording medium when the user is recognized as a correct user.
Japanese Laid-Open Patent Publication No. 2002-245433 discloses a technique for managing an optical disk by integrally forming a loop antenna and an IC chip in a non-recording area of the optical disk in order to fuse an optical disk and an IC card. .
Further, Japanese Patent Application Laid-Open No. 2002-24776 discloses a reader / writer in which a magnetic core is inserted in a loop coil in order to efficiently concentrate the magnetic flux of the reader / writer on an IC card.
JP 2003-59177 A JP 2002-245433 A JP 2002-24776 A

As described above, when an IC tag is attached to a product made of an optical disk or metal, there is a problem that the radio wave of the reader / writer is reflected by the metal and cannot communicate normally. In order to solve this problem, there are methods such as attaching an IC tag to a non-information recording area where a metal foil of an optical disk does not exist, or attaching a non-magnetic sheet to an IC tag to form a magnetic path. However, when a plurality of articles are stacked, there remains a problem that communication with the reader / writer is not normally performed due to interference between IC tags or the influence of metal.
The prior art disclosed in Patent Document 1 has a configuration in which an RFID chip is embedded in a location other than the surface of a recording medium such as a CD. When a plurality of CDs are stacked, the positional relationship between the RFID chips may overlap. Therefore, there is no guarantee that information from all RFID chips can be accurately read due to interference between IC tags.
In the prior art disclosed in Patent Document 2, an IC tag is integrally formed on an optical disc, information on the optical disc is read and written by an optical disc apparatus as usual, and information on the IC tag is read and written by another reader / writer. There is a problem similar to that of Patent Document 1.
In addition, the prior art disclosed in Patent Document 3 is a technique that allows magnetic flux to pass through the IC tag efficiently, and does not read or write by inserting the loop antenna of the IC tag into the magnetic core of the loop antenna. It is impossible to read / write the recorded information of the IC tag at once.
In view of the above problems, the present invention makes the antenna of the reader / writer a rod-like shape and opens the center of the loop antenna of the IC tag attached to the product, thereby interfering the tags of the product with the IC tag attached. Another object of the present invention is to provide a reader / writer that eliminates the effects of electromagnetic interference caused by metal or metal.

In order to solve such a problem, the present invention provides a reader / writer that performs transmission of carrier power and transmission / reception of data based on a predetermined modulation method in a non-contact manner with an IC tag. The writer includes a rod-shaped antenna in which a conductive wire is wound around a rod-shaped magnetic core a predetermined number of times. When the loop antenna of the IC tag and the magnetic core of the rod-shaped antenna are inserted into each other, an electromotive force is induced in the IC tag, Transmission of carrier power and transmission / reception of data based on a predetermined modulation method are performed with an IC tag.
When a signal (AC signal) is passed through a coil wound around a magnetic core, a change in magnetic flux occurs in the magnetic core. On the other hand, when the loop antenna is inserted through the magnetic core, an electromotive force is induced in the loop antenna due to an induction effect due to a change in magnetic flux. The present invention uses this principle to make the reader / writer antenna a rod-shaped magnetic core, wind a coil around it at a predetermined pitch, and insert the IC tag loop antenna through the magnetic core.
According to this invention, since the loop antenna of the IC tag and the magnetic core of the rod-shaped antenna are inserted into each other, the influence of the radio wave interference caused by the metal can be eliminated.
According to a second aspect of the present invention, the magnetic core material of the rod-shaped antenna is ferrite, pure iron, silicon steel, iron / nickel alloy, and dust core.
When a current is passed through the coil, a magnetic field is generated around it, but when a magnetic core is inserted into the coil, the magnetic core becomes a magnet and the magnetic field is further strengthened. The magnetic core preferably has a large relative permeability and a small hysteresis phenomenon. Magnetic cores that satisfy such conditions include ferrite, pure iron, silicon steel, iron / nickel alloy, and dust core.
According to this invention, since the magnetic core material of the rod-shaped antenna is ferrite, pure iron, silicon steel, iron / nickel alloy, and dust core, the relative permeability of the magnetic core can be increased and the hysteresis phenomenon can be reduced.

According to a third aspect of the present invention, the rod-shaped antenna is characterized in that the conducting wire is wound a predetermined number of times over the entire length or a part of the rod-shaped magnetic core in the longitudinal direction.
The magnetic flux of the rod-shaped antenna is proportional to the product (AT) of the number of turns (N) of the coil wound around the magnetic core and the current (A). Therefore, in order to obtain a predetermined magnetic flux without increasing the transmission power, it is necessary to increase the number of turns (N) by winding the coil over the entire length or part of the length of the magnetic core. In addition, in order to strengthen the mutual induction effect with the loop antenna, the closer the coil of the rod-shaped antenna and the loop antenna are, the stronger it is. Therefore, winding the conductive wire over the entire length or a part of the longitudinal direction of the magnetic core is effective for enhancing the mutual induction effect.
According to this invention, since the rod-shaped antenna has a configuration in which the conducting wire is wound a predetermined number of times over the entire length or a part of the longitudinal direction of the magnetic core, the mutual induction action between the rod-shaped antenna and the loop antenna is enhanced, and the transmission power is increased. Can be minimized.
According to a fourth aspect of the present invention, there is provided the IC tag as the read / write object of the reader / writer according to the first aspect of the present invention, in which the conductor is circulated a predetermined number of times around the dielectric substrate and the periphery of the opening provided at a predetermined position of the dielectric substrate. And an integrated circuit that controls transmission of carrier power and transmission / reception of data based on a predetermined modulation system via the loop antenna.
Another feature of the present invention is the configuration of the IC tag. That is, the IC tag is formed of a dielectric substrate, a loop antenna having an opening at the center is formed at a predetermined position of the substrate, and a control integrated circuit (IC) is mounted. With this configuration, the loop antenna and the rod-shaped antenna of the reader / writer can be reliably coupled by mutual induction.
According to this invention, the IC tag is based on a loop antenna formed by winding a lead wire a predetermined number of times around the opening provided at a predetermined position of the dielectric substrate, and a predetermined modulation system via the loop antenna. Since it has an integrated circuit that controls the transmission of carrier power and the transmission and reception of data, the loop antenna and the rod-shaped antenna of the reader / writer are reliably coupled by mutual induction, ensuring communication between the reader / writer and the IC tag. Can be.

According to a fifth aspect of the present invention, the necessary information regarding the attachment target of the IC tag is stored in the memory of the integrated circuit of the IC tag according to the fourth aspect, and the positions of the opening of the IC tag and the opening of the attachment target The opening of the attachment object is inserted into the rod-shaped antenna of the reader / writer according to claim 1, or the rod-shaped antenna is inserted into the opening of the attachment object by configuring the relationship so as to match. It is characterized by reading and writing necessary information on the attachment object.
At the center of the loop antenna of the IC tag, an opening (hole) for inserting the rod-shaped antenna is formed. Therefore, when attaching an IC tag to an article, it is necessary to store the necessary information of the article in a memory and configure the opening and the opening of the article to coincide. By doing so, when the opening of the article is inserted into the rod-shaped antenna, necessary information on the article can be acquired.
According to such an invention, the necessary information of the article to which the IC tag is attached is stored in the memory of the IC tag integrated circuit, and the positional relationship between the opening of the IC tag and the opening of the article is matched. When the opening of the article is inserted into the rod-shaped antenna, necessary information on the article can be acquired.
A sixth aspect of the present invention relates to a disk mechanism portion in which the rod-shaped antenna according to the second or third aspect is formed in a disk rotation shaft, an optical disk having the IC tag according to the fourth aspect, and any one of the first to third aspects. A reader / writer according to claim 1, wherein the optical disk is loaded into the optical disk mechanism unit to read / write information stored in an IC tag of the optical disk and to read / write information recorded on the optical disk. And
A mechanism part of the optical disk device has a rotation shaft for rotating the disk. In the present invention, a rod-shaped antenna is formed on the rotating shaft, and an IC tag is formed at the center of the optical disc, whereby information on the IC tag is read and written and information recorded on the optical disc is read and written. As a result, the security of the optical disk can be improved and unauthorized copying or the like can be prevented.
According to this invention, since the rod-shaped antenna is formed on the rotating shaft of the optical disk and the IC tag is formed at the center of the optical disk, the security of the optical disk can be improved and unauthorized copying and the like can be prevented.

According to a seventh aspect of the present invention, the IC tag is attached to or integrally formed with the optical disc.
When inventory management of an existing optical disk is performed, an IC tag formed on a dielectric substrate needs to be attached to the optical disk later. In this case, an optical disc to be managed can be arbitrarily selected, but there is a risk that the IC tag is peeled off due to the time and effort required for pasting. On the other hand, if the IC tag is embedded in the optical disk manufacturing stage, such a risk can be avoided.
According to this invention, since the IC tag is attached to or integrally formed with the optical disk, it can be used in a wide range from an existing optical disk to a newly manufactured disk.

According to the first aspect of the present invention, since the loop antenna of the IC tag and the magnetic core of the rod-shaped antenna are inserted through each other, it is possible to eliminate the influence of radio wave interference caused by metal.
In the second aspect, since the magnetic core material of the rod-shaped antenna is ferrite, pure iron, silicon steel, iron / nickel alloy, and dust core, the relative permeability of the magnetic core can be increased and the hysteresis phenomenon can be decreased.
According to the third aspect of the present invention, since the rod-shaped antenna has a configuration in which the conducting wire is wound a predetermined number of times over the whole or a part of the longitudinal direction of the magnetic core, the mutual induction action between the rod-shaped antenna and the loop antenna is strengthened and the transmission power is increased. Can be minimized.
According to a fourth aspect of the present invention, the IC tag is based on a loop antenna formed by circulating a lead wire a predetermined number of times around the opening provided at a predetermined position of the dielectric substrate, and based on a predetermined modulation system via the loop antenna. Since it has an integrated circuit that controls the transmission of carrier power and the transmission and reception of data, the loop antenna and the rod-shaped antenna of the reader / writer are reliably coupled by mutual induction, ensuring communication between the reader / writer and the IC tag. Can be.
According to the fifth aspect of the present invention, the necessary information of the article to which the IC tag is attached is stored in the memory of the integrated circuit of the IC tag, and the positional relationship between the opening of the IC tag and the opening of the article is matched. When the opening of the article is inserted into the rod-shaped antenna, necessary information on the article can be acquired.
According to the sixth aspect of the present invention, since the rod-shaped antenna is formed on the rotating shaft of the optical disk and the IC tag is formed at the center part of the optical disk, the security of the optical disk can be improved and unauthorized copying and the like can be prevented.
According to the seventh aspect of the present invention, since the IC tag is attached to or integrally formed with the optical disk, it can be used in a wide range from an existing optical disk to a newly manufactured disk.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention only unless otherwise specified. .
FIG. 1 is a block diagram showing the configuration of the reader / writer of the present invention. This reader / writer 100 is an external computer that transmits and receives data to / from the reader / writer 100 and controls the entire system (hereinafter referred to as a PC) 150, and transmission / reception that controls the data communication protocol between the external PC 150 The device 1, the control device (CPU) 2 that controls the operation of the reader / writer 100 as a whole, the memory device 3 that stores a program that records the procedure for operating the control device 2, and the data from the control device 2 are carried on a carrier wave. A modulator 4 that modulates the operation command, an input device 5 that inputs an operation command, a display device 6 that displays information from the control device 2, a power supply signal that is an AC signal from the control device 2, and the modulator 4. A power amplifier 7 for amplifying the write command of the signal, a detector demodulator 8 for converting the signal received from the rod antenna 9 into binary data, Shaped antenna 9 for transmission and reception of electric power carrier wave and data not IC tag (details will be described later) is constituted by a.
FIG. 2 is a block diagram showing the configuration of the IC tag of the present invention. The IC tag 200 receives a loop antenna 20 that transmits / receives data using a power carrier wave from the reader / writer 100, a transmission / reception device 21 that transmits / receives a write command read command, and a power carrier wave from the loop antenna 20. Power generation circuit 22 that rectifies and converts it into DC power, a memory device 23 that manages temporary storage of a control program and data, a modulator 24 that modulates a transmission command on a carrier wave from the control circuit 26, and transmission and reception It comprises a demodulator 25 that converts carrier wave data from the device 21 into binary data, and a control circuit 26 that controls the overall operation of the IC tag 200. In the present embodiment, circuits other than the loop antenna 20 are integrated as one IC 201 (hereinafter referred to as a control IC).

Next, each operation will be described with reference to FIGS. When a power supply (not shown) is turned on, the reader / writer 100 starts an operation according to a program stored in the memory device 3 after the initial operation of the control device 2. First, the control device 2 transmits a power supply signal to be supplied to the IC tag 200 and a polling signal from the power amplifier 7. The signal is radiated to the outside as an electromagnetic wave from the rod-shaped antenna 9. Next, the loop antenna 20 of the IC tag 200 receives the power supply signal, and the power generation circuit 22 rectifies the carrier wave to convert it into DC power, and supplies it to all the circuits in the tag. When power is supplied and the control circuit 26 is driven, control is started in accordance with a program stored in the memory device 23.
Next, the control circuit 26 of the IC tag 200 first demodulates the command from the transmission / reception device 21 by the demodulator 25, converts it to a binary signal, and analyzes the command. As a result, when it is recognized that it is called, the response is modulated by the modulator 24 and transmitted from the loop antenna 20 via the transmission / reception device 21.
The reader / writer 100 receives this response with the rod-shaped antenna 9, converts it into a binary code with the detector demodulator 8, analyzes it with the control device 2, and recognizes that the IC tag 200 is a tag conforming to the standard. Thereby, communication is performed between the reader / writer 100 and the IC tag 200 thereafter.
FIG. 3 is an external view showing an example of the IC tag 200 of the present invention. The same components will be described with the same reference numerals. The IC tag 200 includes a dielectric substrate 32 having an opening 31 at the substantially center thereof, a loop antenna 20 formed by patterning on the dielectric substrate 32, and a control for transferring data via the loop antenna 20. IC201 is comprised. The material of the dielectric substrate 32 may be a hard material such as a glass epoxy material or a flexible material such as an FPC. Moreover, although the shape of the opening part 31 and the loop antenna 20 is circular in a figure, the shape does not need to be circular. And the magnitude | size is determined by the magnitude | size of the other party's rod-shaped antenna (or L-shaped, U-shaped antenna, etc.). The greatest feature of the IC tag 200 is that an opening 31 is provided at substantially the center of the dielectric substrate 32 and the loop antenna 20 is formed around the opening 31.
FIG. 4 is an external view of an optical disc provided with the IC tag 200 of the present invention. In this optical disc 400, the IC tag 200 is arranged on the inner peripheral portion 43 other than the information recording area 42 formed on the base 41 of the optical disc. The hole position of the opening 40 of the optical disc 400 and the opening 31 of the IC tag 200 are made to coincide. The IC tag 200 may be attached to the optical disc 400 later, or may be integrally formed at the manufacturing stage of the optical disc 400.

FIG. 5 is an external configuration diagram showing an example of the rod-shaped antenna of the present invention. The rod-shaped antenna 9 includes a lead wire 49 connected to the reader / writer 100 at the start end 47 and the end end 48 of the lead wire 46 wound around a magnetic core 45 in a coil shape.
The material of the magnetic core 45 is preferably a material having a large relative permeability and a small hysteresis phenomenon. Magnetic cores that satisfy such conditions include ferrite, pure iron, silicon steel, iron / nickel alloy, and dust core. Moreover, although the strip | belt-shaped conducting wire is used for the conducting wire 46 in the figure, a linear conducting wire may be used.
FIG. 6 is a diagram for explaining a data communication method using the rod-shaped antenna of the present invention. FIG. 6A is a diagram illustrating a state in which a metal is present in the vicinity of the IC tag, and FIG. 6B is a principle diagram at that time. For example, consider a case where a conducting wire 46 is wound around the magnetic core 45 of the rod-shaped antenna 9 and an AC signal 50 is supplied to the start and end of the lead wire 46. For example, if a current flows in the direction of the arrow 51 at a certain moment, a magnetic flux 52 is generated in the magnetic core 45. At this time, it is assumed that the optical disks 400a and 400b of the present invention are inserted into the magnetic core 45 and the metal plate 53 is present in the vicinity of the optical disk 400b. (The metal plate 53 is used as a boundary for classifying optical disks, for example). Further, IC tags 200a and 200b are attached to the optical disks 400a and 400b. As is clear from this figure, the magnetic flux 52 passes through the IC tags 200a and 200b regardless of the presence of the metal plate 53 (that is, the magnetic flux 52 passes through the loop antennas of the IC tags 200a and 200b). ). As a result, an electromotive force is induced in the loop antenna 20 by a change in the magnetic flux 52. In other words, this means that even if the metal plate 53 exists in the vicinity of the optical disc 400b, it is not affected.
FIG. 6B is a principle diagram for explaining the above description in more detail. The same components will be described with the same reference numerals. Here, if the number of turns of the conducting wire 46 is T, the current of the AC signal 50 is A, and the resistance of the magnetic path is R, the magnetic flux ψ of the magnetic core 45 is ψ = AT / R. The metal plate 53 can be regarded as a coil with one winding. Therefore, if the magnetic flux 52 is generated, an electromotive force is induced in the loop antenna 20 of the IC tag 200b with almost no influence. In other words, the IC tag and the reader / writer can communicate with each other within the magnetic core 45 regardless of the number of optical disks.
Further, as described above, the magnetic flux ψ of the rod-shaped antenna is proportional to the product (AT) of the number of turns (N) of the conducting wire 46 wound around the magnetic core 45 and the current (A) flowing through the conducting wire 46. Therefore, in order to obtain a predetermined magnetic flux without increasing the transmission power, it is necessary to increase the number of turns (N) by winding the conducting wire 46 over the entire length of the magnetic core. Further, in order to strengthen the mutual induction effect with the loop antenna, the closer the conductor 46 of the rod-shaped antenna 9 is to the loop antenna, the stronger it becomes. For this purpose, winding the conductive wire over the entire length of the magnetic core is effective for enhancing the mutual induction effect.

FIG. 7 is a configuration diagram of an optical disc management apparatus using a reader / writer equipped with a rod-shaped antenna according to the first embodiment of the present invention. The same components will be described with the same reference numerals. In the case of managing optical disks such as CDs and DVDs, conventionally, it has been necessary to make a determination based on the label notation or to insert the contents into a PC drive device to check the contents. Also, it has been difficult to determine whether the content confirmation and sorting has been completed. In this embodiment, in order to solve such a management problem, the optical disc management apparatus 300 is provided with a PC 150 that is externally provided to the reader / writer 100 to exchange data and control the entire system, and a predetermined modulation. A reader / writer 100 that performs non-contact transmission and transfer of carrier power and data exchange based on the system, a rod-shaped antenna 9 having substantially the same diameter as the shaft hole of the optical disc, and the IC tag 200 of the present invention. And a plurality of optical discs 400, a rod-shaped antenna 9, and a holding table 57 that holds the plurality of optical discs 400. The PC 150 and the reader / writer 100 are connected by a cable 55, and the reader / writer 100 and the rod-shaped antenna 9 are connected by a cable 56. In this figure, the reader / writer 100 and the rod-shaped antenna 9 are described as separate components, but they may be integrated.
Next, the operation of the optical disc management apparatus 300 will be described with reference to FIG. First, a plurality of optical disks 400 to be managed are inserted into the rod-shaped antenna 9. At this time, the orientation of the front and back of the optical disk 400 may be either. The number of optical disks 400 may be any number as long as the height when loaded is within the length of the rod-shaped antenna 9. When a command for transmitting a read command is issued from the PC 150 to the reader / writer 100, the reader / writer 100 transmits a signal to the rod antenna 9 as described with reference to FIG. As a result, a magnetic flux is generated from the magnetic core 45 of the rod-shaped antenna 9 to start communication with the IC tag 200 attached to the optical disc 400, and information stored in the memory of the IC tag 200 is read. The PC 150 receives the information of each optical disc 400 via the reader / writer 100 and stores it in the memory. If necessary, tag information of a predetermined optical disc can be rewritten from the PC 150 via the reader / writer 100. In this way, the optical disc 400 can be easily managed in a lump by simply inserting the optical disc 400 provided with the IC tag 200 into the rod-shaped antenna 9.

FIG. 8 is a block diagram of an optical disc apparatus using a reader / writer equipped with a rod-shaped antenna according to the second embodiment of the present invention. The same components will be described with the same reference numerals. The optical disk device 500 includes a disk rotating shaft 61 with a rod-shaped antenna 9, an optical disk 400 provided with an IC tag 200, an optical pickup 62 for reading and writing information on the optical disk 400, and a disk driver 60 for driving the optical pickup 62. The IC tag reader / writer 100 and a PC 150 for controlling the whole are configured.
The operation will be described with reference to FIG. In the first embodiment of FIG. 7, the IC tag information of a plurality of optical discs is processed in a lump, but in this embodiment, the processing of information recorded on the optical disc and the processing of the information of the IC tag are performed in units of one optical disc. It is done at the same time. For this purpose, an IC tag reader / writer is provided in addition to a mechanism capable of normal disk operation. In the present embodiment, for example, a case where security of an optical disk is performed will be described. First, the optical disk 400 is loaded on the disk rotation shaft 61. As a result of the PC 150 reading the information stored in the IC tag of the optical disc, if copy prohibition information has been written to the IC tag, when the PC 150 issues a copy operation instruction, the display unit cannot copy. Display and stop operation. As another example, by specifying a non-rewritable area of the optical disc 400 in the IC tag 200, important data on the optical disc 400 can be prevented from being lost.

FIG. 9 is a configuration diagram of a metal plate management apparatus using a reader / writer equipped with a bar-shaped antenna according to a third embodiment of the present invention. The same components will be described with the same reference numerals. The metal plate management apparatus 600 includes a rod-shaped antenna 9, a plurality of metal plates 65 including an IC tag 200, a holding table 66 that holds the metal plate 65, an IC tag reader / writer 100, and a PC 150 that controls the whole. And is configured.
The operation will be described with reference to FIG. As described above, when an IC tag is attached to a metal, radio waves from the reader / writer do not reach a necessary magnetic field for the operation of the IC tag due to reflection and attenuation, and communication is not normally performed. If the item to be managed is a metal, communication cannot be performed normally due to the same problem as described above just by attaching an IC tag. Therefore, in this embodiment, an opening 67 is provided at a predetermined location of the metal plate 65, and the opening of the IC tag 200 is provided so as to coincide with the opening 67, thereby avoiding the influence of metal (the reason). (See FIG. 6) The information of the IC tag 200 can be read and written. In the present embodiment, the case where the item to be managed is a metal has been described, but it is needless to say that it is not particularly limited to a metal.

It is a block diagram which shows the structure of the reader / writer of this invention. It is a block diagram which shows the structure of the IC tag of this invention. It is an external view which shows an example of IC tag 200 of this invention. It is an external view of an optical disk provided with the IC tag 200 of the present invention. It is an external appearance block diagram which shows an example of the rod-shaped antenna of this invention. It is a figure explaining the data communication method by the rod-shaped antenna of this invention. It is a block diagram of the optical disk management apparatus by the reader / writer provided with the rod-shaped antenna which concerns on the 1st Embodiment of this invention. It is a block diagram of the optical disk apparatus by the reader / writer provided with the rod-shaped antenna which concerns on the 2nd Embodiment of this invention. It is a block diagram of the metal plate management apparatus by the reader / writer provided with the rod-shaped antenna which concerns on the 3rd Embodiment of this invention.

Explanation of symbols

  9 Rod Antenna, 57 Holding Base, 100 Reader / Writer, 150 Computer, 200 IC Tag, 300 Optical Disk Management Device, 400 Optical Disk

Claims (7)

  1. A reader / writer that performs carrier power transmission and data exchange based on a predetermined modulation method in a contactless manner with an IC tag,
    The reader / writer includes a rod-shaped antenna in which a lead wire is wound around a rod-shaped magnetic core a predetermined number of times, and an electromotive force is induced in the IC tag by inserting the loop antenna of the IC tag and the magnetic core of the rod-shaped antenna into each other. A reader / writer which transmits carrier power and exchanges data with the IC tag based on a predetermined modulation method.
  2.   The reader / writer according to claim 1, wherein the magnetic core material of the rod-shaped antenna is ferrite, pure iron, silicon steel, iron / nickel alloy, and dust core.
  3.   3. The reader / writer according to claim 1, wherein the rod-shaped antenna is formed by winding the conducting wire a predetermined number of times over the entire length or a part of the rod-shaped magnetic core in the longitudinal direction.
  4.   2. The IC tag as a read / write object of the reader / writer according to claim 1, wherein a loop is formed by winding a conductive wire around a dielectric substrate and a periphery of an opening provided at a predetermined position of the dielectric substrate a predetermined number of times. An IC tag, comprising: an antenna; and an integrated circuit that controls transmission of carrier power and transmission / reception of data based on a predetermined modulation system via the loop antenna.
  5.   5. Necessary information related to an attachment object of the IC tag is stored in the memory of the integrated circuit of the IC tag according to claim 4, so that the positional relationship between the opening of the IC tag and the opening of the attachment object matches. The opening of the attachment object is inserted into the rod-shaped antenna of the reader / writer according to claim 1, or the rod-shaped antenna is inserted into the opening of the attachment object so that the attachment object is necessary. An article management apparatus that reads and writes information.
  6. The disk mechanism part which formed the rod-shaped antenna of Claim 2 or 3 in the disk rotating shaft, the optical disk provided with the IC tag of Claim 4, and any one of Claims 1 thru | or 3 With a reader / writer,
    An optical disc apparatus, wherein the optical disc is loaded into the optical disc mechanism section to read / write information stored in an IC tag of the optical disc and read / write information recorded on the optical disc.
  7.   The optical disc apparatus according to claim 6, wherein the IC tag is attached to or integrally formed with the optical disc.
JP2003406003A 2003-12-04 2003-12-04 Reader/writer, ic tag, article control device, and optical disk device Pending JP2005165839A (en)

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