JP2005339089A - Non-contact id system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent interference due to a plurality of question signals without outputting any stop request from a host management device 1, and to reduce communication quantity between the host management device 1 and a card reader 2. <P>SOLUTION: This non-contact ID system is provided with a plurality of non-contact IC cards with different communication standards, the card reader 2 equipped with a plurality of signal processing parts 22 to 24 for transmitting question signals to the cards and a control part 21 for outputting a driving instruction and a stop instruction to the signal processing parts 22 to 24 and a host management device 1 for outputting a question request to the card reader 2. At the time of transmitting the question signal based on any communication standard to the card reader 2, the host management device 1 transmits the question request corresponding to the communication standard, and the control part 21 of the card reader 2 outputs the driving instruction to the signal processing parts 22 to 24 corresponding to the communication standard, and outputs the stop instruction to the other signal processing parts 22 and 24. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a non-contact ID system including a responder that stores a unique identifier and an interrogator that reads the identifier stored in the responder in a non-contact manner. It is used for management.

  Conventionally, for security management in a company, a non-contact IC card is carried by an employee, and when entering the facility of the company, the card reader provided near the facility door is There is known a non-contact ID system for discriminating whether an employee is an employee by letting an IC card appear and controlling the opening and closing of the door. As such a system, for example, as shown in the schematic diagram of FIG. 3, a host management device 1 that performs entrance / exit management, a card reader 2 that corresponds to an interrogator, and a non-contact IC card 3 that corresponds to a responder Some have an automatic door 4 provided at the entrance of the facility.

  Thus, the operation of the system will be described. The upper management apparatus 1 transmits a question request to the card reader 2 at predetermined intervals, and when the card reader 2 receives the question request, the question signal Send. At this time, if the non-contact IC card 3 exists within the output range of the interrogation signal, the non-contact IC card 3 generates electric power from the interrogation signal by electromagnetic induction or the like, and a response signal including an identifier (ID) Send. Then, the response signal is read by the card reader 2, and the fact that the response has been detected is returned to the upper management apparatus 1. The host management device 1 determines whether the identifier of the contactless IC card 3 included in the response detection is stored in its own database, and if it is stored, authenticates that it is a valid user. Thus, an unlocking request is output to the automatic door 4.

  The system described so far is based on a single communication standard, but recently, a so-called multi-access type card reader has appeared. This method is a method that enables a single card reader 2 to read a plurality of communication standards (communication rules), and a plurality of non-contact ID systems have been mixed in one facility. For this reason, this is a method adopted to eliminate the complexity of having multiple communication standards. The difference from the one based on the above-mentioned single communication standard is that when a question request is transmitted from the upper management apparatus 1, question signals based on different communication standards are sequentially transmitted from the card reader 2. (For example, refer to Patent Document 1).

  As described above, when an inquiry signal based on different communication standards is transmitted, as shown in FIG. 1B, it is necessary to provide a plurality of signal processing units 22 to 24 conforming to the respective communication standards. Become. For example, when there are a plurality of communication standards A to C, and the card reader 2 is to transmit the inquiry signal A based on the communication standard A from among these, the upper management apparatus 1 determines that the card reader 2 On the other hand, a question request A which is a command for transmitting a question signal A is output, and stop requests B and C which are commands for not transmitting a question signal for the communication standards B and C are output.

Upon receiving these requests, the control unit 21 of the card reader 2 outputs a drive command to the signal processing unit 22 corresponding to the communication standard A and the signal processing unit 23 corresponding to each of the other communication standards B and C. 24, a stop command is output. As a result, the signal processing unit 22 can transmit a desired question signal A instructed from the upper management apparatus 1 without being affected by the other signal processing units 23 and 24.
JP2001-143023

  By the way, in this system, as described above, when the question signal A based on the communication standard A is to be transmitted, the other signal processing units 23 and 24 are driven to interrogate the question signal etc. interfering with the question signal A. In order not to transmit, not only the question request A but also the stop requests B and C for stopping the driving of the other signal processing units 23 and 24 are output from the upper management apparatus 1. There has been a problem that the amount of communication between the device 1 and the card reader 2 increases. In addition, since each request described above is set by the user of the upper management apparatus 1, when the output of the stop request is not set due to a setting error, a plurality of question signals are transmitted. There was also a problem of frequent occurrence of communication errors due to interference.

  The present invention has been made in view of the above-described problems, and an object of the present invention is interference caused by a plurality of question signals being transmitted from the upper management device 1 without outputting a stop request. Is to provide a contactless ID system that reduces the amount of communication between the host management device 1 and the card reader 2.

  In order to provide the non-contact ID system, the present invention stores a unique identifier, a plurality of responders each having a different communication standard, and the corresponding communication standard for each of the responders. A plurality of signal processing units based on a plurality of signal processing units for receiving a response signal including the identifier returned by receiving a question signal of a communication standard compatible with the responder, and receiving a question request from the outside , An interrogator having a control unit that outputs a drive command or a stop command to the signal processing unit, and a question request for causing the interrogator to transmit a question signal based on any one of the communication standards A non-contact ID system comprising a host management device, wherein the host management device supports the communication standard when the interrogator transmits a query signal based on any communication standard. The interrogator control unit outputs a drive command to the signal processing unit corresponding to the communication standard, while stopping for other signal processing units corresponding to the communication standard. It is characterized by outputting an instruction.

  By adopting this means, first, it is not necessary to output a stop request from the higher-level management device 1, so that the communication amount between the higher-level management device 1 and the card reader 2 can be reduced. Further, since the card reader 2 outputs a stop command to a signal processing unit that does not correspond to the desired communication standard, a plurality of question signals can be output without setting a stop request by the user of the upper management apparatus 1. There is no transmission, thereby preventing the occurrence of interference and the effect of preventing communication errors due to the interference.

[First Embodiment]
Next, based on the above solution, a preferred embodiment for carrying out the present invention will be described. First, the present embodiment has a feature different from the prior art. First, when the upper management apparatus 1 causes the card reader 2 corresponding to the interrogator to transmit an inquiry signal based on any communication standard, Only a question request corresponding to a communication standard is transmitted, and a stop request that is a command not to transmit a question signal of another communication standard is not transmitted. Second, the control unit 21 of the card reader 2 follows the received question request. The driving command is output to the corresponding signal processing unit 22, while the stop command is output autonomously to the other signal processing units 23 and 24.

  And in order to implement | achieve this characteristic operation | movement, the following structures are employ | adopted as an example. First, as shown in FIG. 2, the upper management apparatus 1 controls the card reader 2 and authenticates the identifier of the non-contact IC card 3 corresponding to the responder read by the card reader 2. It is. As shown in the figure, the configuration includes a control unit 10 that controls each unit in the host management device, a transmission / reception unit 11 that transmits / receives signals to / from the card reader 2 through serial communication, and a valid non-contact IC card in advance. 3, and an authentication database 12 that stores three identifiers. Each unit 11, 12 is connected to the control unit 10.

  The card reader 2 transmits an interrogation signal to the non-contact IC card 3, receives the response signal of the non-contact IC card 3, and detects the response that the card is detected together with the identifier of the card included in the response signal. Is an interrogator that transmits to the upper management apparatus 1. As shown in the figure, the configuration controls a transmission / reception unit 20 that transmits and receives signals to and from the higher-level management device 1 through serial communication and the like, and signal processing units 22 to 24 of a communication standard corresponding to a request from the higher-level management device The control unit 21, the signal switching unit 25 that switches the output depending on the presence or absence of signals output from the signal processing units 22 to 24, the RF amplification unit 26 that amplifies the signal to the transmission power, and the amplified signal Is provided.

  The antenna 27 is not particularly limited as long as it can transmit and receive the signal and the like, but for example, a loop antenna is used. The amplifying unit 26 also amplifies the carrier wave including the response signal of the non-contact IC card 3 received by the antenna 27, and transmits the amplified carrier wave to each signal processing unit 22 to 24 through the signal switching unit 25. Based on the drive command from the control unit 21, the signal processing units 22 to 24 generate signal signals according to the respective communication standards and acquire signal identifiers from response signals that conform to the communication standards of the signal processing circuits 221 to 241. Then, the modulation / demodulation circuits 222 to 242 which modulate the carrier wave with the interrogation signal and demodulate the response signal from the carrier wave received by the antenna 27 and output to the signal processing circuits 221 to 241. And. Moreover, although the signal processing part has illustrated three of 22-24, two may be sufficient and four or more may be sufficient.

  The non-contact IC card 3 is a responder that receives a query signal that conforms to its own communication standard transmitted from the card reader 2 and returns a response signal including its own identifier. As shown in the figure, the configuration includes an antenna 30 for receiving an interrogation signal (including a carrier wave) transmitted from the card reader 2, and a power source that generates electric power from the carrier wave received by the antenna by electromagnetic induction or the like. The generation unit 31, the modulation / demodulation unit 32 that demodulates the carrier wave with the response signal, and the query signal is identified, and the storage unit 34 that stores the unique identifier refers to its own identifier. And a control unit 33 for generating a response signal. The antenna 30 may be any antenna that can transmit and receive signals in the same manner as the antenna 27. For example, a loop antenna is used. Moreover, the power supply generation part 31 should just be able to generate electric power with the carrier wave transmitted from the card reader 2, and is not limited to electromagnetic induction.

  The automatic door 4 is a load that operates when the high-level management device 1 can authenticate that the user is a legitimate user. And a control unit 41 that controls a drive unit 42 that drives a door as a load in accordance with an operation request (unlocking request) from the higher-level management device 1. In addition, what is necessary is just to operate | move when it can authenticate that it is a legitimate user, and it is not the meaning limited to an automatic door.

  Next, based on the above configuration, the operation of the present embodiment will be described in detail with reference to FIGS. First, the control unit 10 of the upper management apparatus 1 transmits a question request corresponding to a desired communication standard to the card reader 2 via the transmission / reception unit 11 arbitrarily or at predetermined time intervals. The transmission / reception unit 20 outputs the question request to the control unit 21. Next, upon receiving the question request, the control unit 21 of the card reader 2 that has received the question request from the upper management apparatus 1 outputs a drive command to the signal processing units 220 to 240 corresponding to the question request. And outputting a question signal based on the communication standard corresponding to the question request. On the other hand, a stop command is output to the other signal processing units 220 to 240, and the signal processing units 220 to 240 that have received the request stop driving.

  In the example of FIG. 1A, one question request A is output from the upper management apparatus 1, and the control unit 21 of the card reader 2 outputs a drive command to the signal processing unit 22, and While the question signal A based on the communication standard corresponding to the question request A is transmitted, a stop command is output to the other signal processing units 23 and 24 so that other question signals are not transmitted. ing. Here, the operation up to the question signal output will be described in detail. First, a drive command is transmitted from the control unit 21 to each of the signal processing circuits 221 to 241, and each of the signal processing circuits 221 to 241 receiving the command The interrogation signals are generated in their own communication formats and output to the modulation / demodulation circuits 222-242. The modulation / demodulation circuits 222 to 242 modulate the carrier wave using the received interrogation signal and output the modulated carrier wave to the RF amplification unit 26 via the signal switching unit 25. The RF amplification unit 26 amplifies the carrier wave to the transmission power, 27 is transmitted.

  Then, the non-contact IC card 3 that has received the carrier wave including the interrogation signal by the antenna 30 generates power from the carrier wave by the power generation unit 31, and supplies the power to the modem unit 32, the control unit 33, and the storage unit 34. Supply. On the other hand, the modem unit 32 demodulates the carrier wave received by the antenna 30, extracts the interrogation signal, and outputs it to the control unit 33. When recognizing that it is a question signal from the card reader 2, the control unit 33 refers to the storage unit 34 to acquire its own identifier, and creates a response signal including the identifier. Further, the response signal is output to the modem unit 32, and the modem unit 32 modulates the carrier wave with the response signal and transmits the carrier wave including the response signal via the antenna 30.

  Next, the carrier wave is received by the antenna 27 of the card reader 2, amplified to a predetermined power by the RF amplification unit 26, and subjected to filtering processing. Since the switching unit 25 is connected to the signal processing units 22 to 24, the received carrier wave is output to the corresponding signal processing units 22 to 24. In the example of FIG. 1A, the carrier wave is output to the signal processing unit 22 corresponding to the interrogation signal A, demodulated by the modulation / demodulation circuit 222, the response signal is extracted, and output to the signal processing circuit 221. Is done.

  The signal processing circuit 221 extracts the identifier of the non-contact IC card 3 from the response signal and outputs it to the control unit 21. The control unit 21 creates a response detection signal including the identifier, and transmits / receives the signal. 20 to the upper management apparatus 1. When the control detection unit 10 of the host management device 1 receives the response detection signal via the transmission / reception unit 11, the identifier of the non-contact IC card 3 included in the response detection signal is extracted, and the authentication database 12 is referred to. Authenticate whether the user is valid. If the user is a valid user, an operation request (unlocking request) is output to the automatic door 4 via the transmission / reception unit 11, and the control unit 41 of the automatic door 4 that receives the request via the transmission / reception unit 40. Outputs a drive control signal to the drive unit 42 to open and close the door.

It is the schematic which shows operation | movement of a non-contact ID system, (a) is based on this invention, (b) is based on a prior art. It is a block diagram which shows the system configuration | structure of this invention. It is the schematic which shows the system configuration | structure of a non-contact ID system.

Explanation of symbols

1 Upper management device 2 Card reader (interrogator)
3 Non-contact IC card (responder)
4 Automatic door

Claims (1)

A unique identifier is stored, a plurality of responders each having a different communication standard, and a plurality of interrogation signals based on the respective communication standard are transmitted to the responders, and the responder conforms to itself. A plurality of signal processing units for receiving a response signal including the identifier returned in response to a communication standard question signal, and receiving a question request from the outside, and issuing a drive command or a stop command to those signal processing units A non-contact ID system comprising: an interrogator having a control unit for outputting; and an upper management device for outputting a question request for causing the interrogator to transmit a question signal based on any one of the communication standards. ,
When the upper management apparatus transmits an interrogation signal based on any communication standard to the interrogator, the interrogator transmits a question request corresponding to the communication standard, and the control unit of the interrogator supports the communication standard. A non-contact ID system that outputs a drive command to the signal processing unit and outputs a stop command to a signal processing unit that complies with other communication standards.

Images