JP2006163819A - Contactless ic card reader/writer device and its control method, data communication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a contactless card reader/writer device which can prevent unnecessary communication with an IC card carried by a passenger who is other than the passengers getting on and off and has no intent to communicate, when installed in a vehicle such as a bus and a train. <P>SOLUTION: The contactless card reader/writer device takes in a signal of a door open/close switch 4 which makes a door for getting on/off of a bus open/close, and when the door is in an open state, radio wave is emitted from an antenna 15 and communication with the IC card 2 becomes possible. When the door is in a closed state, emission of radio wave from the antenna 15 is stopped and unnecessary communication with the IC card of a passenger who is other than the passengers getting on and off and has no intent to communicate is prevented. A proximity sensor 5 which detects approach of the IC card to a surface of the antenna 15 is set, and emission of the radio wave from the antenna 15 is stopped when approach of the IC card 2 to the antenna 15 is not detected by the proximity sensor 5 even if the door is in the open state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a non-contact IC card reader / writer device that performs non-contact data communication between non-contact IC cards used for tickets such as buses and trains, for example, and a control thereof. Method and data communication method.

  In recent years, a non-contact IC card reader / writer device (hereinafter referred to as “card reader / writer”) is used in a non-contact (wireless) manner from a ticket such as a ticket using a non-contact IC card (hereinafter referred to as “IC card”). An automatic fare clearing system that reads data and performs data processing such as fare clearing has been put into practical use (for example, Patent Document 1).

In this type of automatic fare clearing system, the card reader / writer always radiates radio waves from the antenna in order to detect that the IC card carried by the user approaches the antenna surface of the card reader / writer. When the IC card enters the communication range of the antenna, the card reader / writer receives a response from the IC card through the antenna, and then starts communication necessary for processing for fare settlement.
JP 2004-151911 A

  Normally, card reader / writers for fare clearing are installed at the ticket gates of stations in the case of trains, but they are installed in buses, trains, etc. It is also possible to communicate with an IC card and carry out fare settlement.

  However, the card reader / writer detects the approach of the IC card while always radiating radio waves from the antenna. Therefore, when the card reader / writer is installed in the car, the IC card of the passenger who has already settled the fare, especially when it is crowded Even when the card approaches the antenna, communication with the IC card is performed, which may cause troubles such as multiple liquidation and incorrect liquidation. Furthermore, it is disadvantageous in terms of power consumption to always keep radio waves radiated from the antenna, especially when installing in a bus, it is necessary to take power from the car battery system, thus saving power. Importance is high.

  The present invention has been made in view of such circumstances. For example, when installed in a vehicle such as a bus or a train, an IC carried by a passenger (user) who does not intend to communicate other than a user who gets in and out of the vehicle. An object of the present invention is to provide a non-contact IC card reader / writer device that can prevent unnecessary communication with a card, a control method thereof, and a data communication method.

  In order to solve such a problem, a non-contact IC card reader / writer device according to the present invention includes an antenna that transmits and receives data without contact with a non-contact IC card, and a user who carries the non-contact IC card. A control means for inputting a signal corresponding to opening / closing of the door to be controlled, and for controlling the radio wave to be radiated from the antenna when the door is open and to stop the radio wave from the antenna when the door is closed; It is characterized by comprising.

  The non-contact type IC card reader / writer device according to the present invention further includes detection means for detecting the approach of the object to the antenna, and the control means is configured to detect the object to the antenna by the detection means when the door is open. Control may be performed so as to radiate radio waves from the antenna on the condition that the approach is detected.

  Furthermore, the non-contact type IC card reader / writer device according to the present invention detects a first detection means for detecting the approach of an object to the antenna and an approach of an object around a detection range of the first detection means. And a second detection means that detects the approach of the object by the first detection means and the second detection means does not detect the approach of the object. It is good also as performing control so that an electromagnetic wave may be radiated | emitted from an antenna on the condition.

  According to the non-contact IC card reader / writer device and the control method and data communication method of the present invention, when installed in a vehicle such as a bus or train, the use is not intended to communicate except for users who get in and out of the vehicle. Unnecessary communication with the IC card carried by the person can be prevented.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing the configuration of the entire automatic fare clearing system using the non-contact IC card reader / writer device according to the first embodiment of the present invention. The non-contact IC card reader / writer device (hereinafter referred to as “card reader / writer”) 1A of this embodiment is installed, for example, in a vehicle such as a bus or a train, more specifically, in the vicinity of a door for getting on / off the vehicle. The In this embodiment, a case where the automatic fare clearing system 100 is adopted for a bus will be described.

  In the figure, reference numeral 3 controls the card reader / writer 1A and receives data read from the non-contact IC card (hereinafter referred to as “IC card”) 2 by the card reader / writer 1A and performs data processing such as fare settlement. It is a host device to perform. This host device 3 is also installed in the bus. Reference numeral 4 denotes a door opening / closing switch 4 for switching between opening and closing of a door for getting on and off the bus. The door opening / closing switch 4 is, for example, a switch manually operated by a bus operator or the like. When the door opening / closing switch 4 is operated to the open side, the door of the bus is opened, and when the door opening / closing switch 4 is operated to the close side, the door drive mechanism (not shown) is controlled to close. The output of the door opening / closing switch 4 is also connected to a later-described control CPU (Central Processing Unit) 11 in the card reader / writer 1A. The control CPU 11 is connected to the door opening / closing switch 4 based on a signal from the door opening / closing switch 4. The open / close state can be recognized.

  Regardless of the method of recognizing the open / closed state of the door from the output of the door open / close switch 4, each door open / closed state is detected using a mechanical switch or an optical sensor. By doing so, the door open / close state may be recognized.

  The card reader / writer 1A includes a control CPU 11, a power supply circuit 12, a transmission circuit 13, a reception circuit 14, and an antenna 15. The control CPU 11 controls each part of the card reader / writer 1 </ b> A based on various operation commands given from the host device 3. Further, the door opening / closing state is recognized from the output of the door opening / closing switch 4 and control for switching on / off the radio wave emission of the antenna 15 is performed according to the result. The power supply circuit 12 takes in power from, for example, a battery on the bus, generates power necessary for the operation of each part of the card reader / writer 1A, and supplies it to each part. Further, the power supply circuit 12 can switch ON / OFF of power supply to the transmission circuit 13 based on a control signal from the control CPU 11. In the initial state when the power is turned on, the power supply to the transmission circuit 13 is OFF. The transmission circuit 13 modulates the data for transmission given from the host device 3 and supplies a transmission signal to the antenna 15. The reception circuit 14 demodulates the signal received by the antenna 15 and generates reception data. The antenna 15 transmits and receives signals to and from the IC card 2 adjacent to the antenna 15 in a non-contact (wireless) manner.

  The IC card 2 is a writable storage medium in which an integrated circuit such as an IC chip or an LSI or an antenna coil is embedded in a plastic card, for example, and the antenna coil operates the integrated circuit from radio waves from the antenna 15. It also has a role of generating electric power necessary for the operation.

Next, the operation of the automatic fare clearing system 100 of the first embodiment will be described.
FIG. 2 is a flowchart showing an operation procedure based on the state of the door opening / closing switch 4 in the automatic fare clearing system 100.

  When the bus engine starts, power is supplied to the card reader / writer 1A. Note that power may be supplied from the battery of the bus regardless of engine start / stop. The same applies to later-described embodiments. Thereafter, when the bus door open / close switch 4 is operated (step 201), a signal of the door open / close switch 4 is output to a door drive mechanism (not shown) to open or close the door, and at the same time, a card reader. Input to the control CPU 11 of the writer 1A.

  When the signal of the door opening / closing switch 4 is a door opening signal for opening the door (YES in step 202), the control CPU 11 turns on the power supply to the transmission circuit 13 for the power supply circuit 12. A control signal for outputting is output. As a result, the power supply from the power supply circuit 12 to the transmission circuit 13 is turned on, radio wave radiation from the antenna 15 is started (step 203), and communication with the IC card 2 is possible.

  When the IC card 2 carried by the user is brought close to the antenna 15 of the card reader / writer 1A, that is, when the IC card 2 enters the communicable range of the antenna 15, communication is performed between the card reader / writer 1A and the IC card 2. Be started. When the host device 3 detects that communication with the IC card 2 is started, the host device 3 instructs the card reader / writer 1A to read the information recorded in the IC card 2. In response to the instruction, the card reader / writer 1A reads information from the IC card 2 and transfers it to the host device 3. The host device 3 performs processing such as fare settlement based on the information transferred from the card reader / writer 1A.

  When the signal of the door opening / closing switch 4 is a door closing signal for closing the door (NO in step 202), the control CPU 11 turns off the power supply to the transmission circuit 13 for the power supply circuit 12. Control signal for output. As a result, the power supply from the power supply circuit 12 to the transmission circuit 13 is turned off, and the emission of radio waves from the antenna 15 is stopped (step 204).

  The signal from the door opening / closing switch 4 is input directly to the power supply circuit 12 instead of the control CPU 11, and the power supply circuit 12 turns on / off the power supply to the transmission circuit 13 based on the signal from the door opening / closing switch 4. You may comprise so that OFF may be switched.

  As described above, according to the first embodiment, when the bus door is open, for example, when the passenger stops at the stop and gets on and off, the IC card 2 that the passenger presents by emitting radio waves from the antenna 15 However, when the door is closed, for example, radio waves are not radiated from the antenna 15 during traveling, so there is no need to communicate with an IC card of a passenger who does not intend to communicate except for passengers getting on and off. Communication can be prevented, and errors such as multiple liquidation and incorrect liquidation can be prevented. Further, the power saving effect can be obtained by stopping radio wave emission from the antenna 15 during traveling.

Next, a second embodiment of the present invention will be described.
FIG. 3 is a block diagram showing the configuration of the entire automatic fare clearing system using the non-contact IC card reader / writer device according to the second embodiment of the present invention. Similar to the first embodiment, the card reader / writer 1B of this embodiment is installed in the vicinity of the door inside the bus.

  In this automatic fare clearing system 200, the proximity sensor 5 connected to the card reader / writer 1B is added to the configuration of the first embodiment. The proximity sensor 5 is installed on the surface of the antenna 15, detects the approach of the object (IC card 2) to the surface of the antenna 15, and sends a card approach detection signal to the control CPU 11.

  FIG. 4 shows an installation example of the proximity sensor 5. The antenna 15 is provided with a loop antenna 21. Usually, since the IC card 2 is assigned to the center position of the loop antenna 21 for communication, it is preferable that the proximity sensor 5 is disposed at a substantially center position within the area surrounded by the loop antenna 21. Of course, the position of the proximity sensor 5 in the antenna 15 is not limited to this example, and may be installed in another position as long as the IC card 2 can be detected as approaching the antenna 15.

  Further, when the proximity sensor 5 detects that the IC card 2 has approached the antenna 15, an LED (Light Emitting Diode) 22 is installed on the antenna 15 as shown in FIG. May be. The proximity sensor 5 is a sensor that can detect the approach of an object in a non-contact manner using infrared rays, ultrasonic waves, electromagnetics, or the like.

Next, the operation of the automatic fare clearing system 200 of the second embodiment will be described.
FIG. 5 is a flowchart showing an operation procedure based on the states of the door opening / closing switch 4 and the proximity sensor 5 in the automatic fare clearing system 200.

  When the bus engine starts, power is supplied to the card reader / writer 1B. Thereafter, when the bus door open / close switch 4 is operated (step 501), a signal of the door open / close switch 4 is output to a door driving mechanism (not shown) to open or close the door, and at the same time, the card reader. Input to the control CPU 11 of the writer 1B.

  The signal of the door opening / closing switch 4 input to the control CPU 11 is stored as door opening information or door closing information in the memory in the control CPU 11 and is held until the next different signal is input from the door opening / closing switch 4. . That is, the memory in the control CPU 11 always holds information indicating the door open / closed state.

  When the door is open, that is, when the door opening information is held in the memory in the control CPU 11 (YES in step 502), when the object (IC card 2) approaches the antenna 15, this is detected by the proximity sensor 5. Detected and a card approach detection signal is sent to the control CPU 11 (YES in step 503). In this case, the control CPU 11 outputs a control signal for turning on the power supply to the transmission circuit 13 to the power supply circuit 12. As a result, power supply from the power supply circuit 12 to the transmission circuit 13 is turned on, radio wave emission from the antenna 15 is started (step 504), and communication between the card reader / writer 1B and the IC card 2 is started. Is done.

  The sensitivity of the proximity sensor 5 is set so as to ensure that the IC card 2 is within the communicable range of the card reader / writer 1B when the proximity sensor 5 detects the proximity of the IC card 2. Is desirable. If the sensitivity of the proximity sensor 5 is set too high, there is a high possibility that an object other than the IC card 2 provided by the passenger getting on and off, for example, a passenger's body, luggage, IC card 2 or the like that is not intended to communicate will be detected. If the sensitivity of the proximity sensor 5 is too low, there is a high possibility that communication will not be started even if the passenger getting on and off has inserted the IC card 2 into the antenna 15.

  When the host device 3 detects that the communication between the card reader / writer 1B and the IC card 2 is started, the host device 3 instructs the card reader / writer 1B to read the information recorded in the IC card 2. In response to the instruction, the card reader / writer 1B reads information from the IC card 2 and transfers it to the host device 3. As a result, the host device 3 performs processing such as fare settlement based on the information transferred from the card reader / writer 1B.

  When processing such as fare settlement is completed in the host device 3 and the IC card 2 is separated from the antenna 15, the transmission of the card approach detection signal from the proximity sensor 5 to the control CPU 11 is stopped, and the control CPU 11 When reception of the approach detection signal is stopped (NO in step 503), a control signal for turning off the power supply to the transmission circuit 13 is output to the power supply circuit 12. As a result, power supply from the power supply circuit 12 to the transmission circuit 13 is turned off, and emission of radio waves from the antenna 15 is stopped (step 505).

  Further, when the door is closed, that is, when the door closing information is held in the memory in the control CPU 11 (NO in step 502), regardless of the presence / absence of the card approach detection signal from the proximity sensor 5, The CPU 11 outputs a control signal for turning off the power supply to the transmission circuit 13 to the power supply circuit 12 to stop radio wave emission from the antenna 15 (step 505).

  As described above, in the second embodiment, radio waves are emitted from the antenna 15 only when the door is open and the proximity sensor 5 detects the approach of the IC card 2 to the antenna 15. In other words, even when the door is open, if the proximity sensor 5 does not detect the proximity of the IC card 2 to the antenna 15, the emission of radio waves from the antenna 15 is stopped. With such a configuration, unnecessary communication with an IC card of a passenger who does not intend to communicate other than passengers getting on and off can be prevented, and errors such as multiple liquidation and incorrect liquidation can be prevented. That is, when the bus is crowded, passengers who have already settled fares and passengers who are not planning to get off are also crowded near the antenna 15, and the IC card carried by these passengers and the card reader / writer 1B are connected to the door. However, according to the present embodiment, such a problem can be avoided. Furthermore, according to this embodiment, the radio wave emission time of the antenna 15 can be further shortened, and the power saving effect can be further enhanced.

  As a modification of the second embodiment, when an object approaching the antenna 15 is detected by the proximity sensor 5 before the door is opened, radio waves may not be emitted from the antenna 15 even when the door is opened. Thus, even if a passenger who does not intend to communicate approaches the antenna 15 due to congestion, even if the bus stops and the door opens, communication with the IC card 2 carried by the passenger can be prevented. In this case, if the object is once separated from the antenna 15 after the door is opened and the proximity sensor 5 detects that the object has approached the antenna 15 again, radio waves are emitted from the antenna 15. Good.

  Further, signals from the door opening / closing switch 4 and the proximity sensor 5 are directly input to the power supply circuit 12 instead of the control CPU 11, and the power supply circuit 12 transmits a transmission circuit based on the signals from the door opening / closing switch 4 and the proximity sensor 5. The power supply to the power supply 13 may be switched on / off.

Next, a third embodiment of the present invention will be described.
FIG. 6 is a block diagram showing the configuration of the entire automatic fare clearing system using the non-contact IC card reader / writer device according to the third embodiment of the present invention. Similar to the first embodiment and the second embodiment, the card reader / writer 1C of this embodiment is installed in the vicinity of the door in the bus.

  The automatic fare clearing system 300 is obtained by adding a card approach detection proximity sensor 5 and a bag approach detection sensor 6 connected to the card reader / writer 1C to the configuration of the first embodiment. The proximity sensor 5 for detecting card approach detects the approach of an object to the surface of the antenna 15 and sends a card approach detection signal to the control CPU 11. The load approach detection sensor 6 detects the approach of an object to the periphery of the surface of the antenna 15 and sends a load approach detection signal to the control CPU 11.

  FIG. 7 shows an installation example of the proximity sensor 5 for detecting the card approach and the sensor 6 for detecting the approach of the baggage. The proximity sensor 5 for detecting card approach is disposed at a substantially center position in an area surrounded by the loop antenna 21 in the antenna 15. Of course, the position of the proximity sensor 5 for detecting card approach in the antenna 15 is not limited to this example, and any other position may be used as long as it can detect that an object approaches the surface of the antenna 15. The baggage approaching detection sensor 6 is located on the surface of the plate 23 to which the antenna 15 is attached, to a certain distance from the antenna 15, that is, to the extent that the IC card 2 approached by the passenger toward the surface of the antenna 15 cannot be detected. It is installed at a remote location. It is preferable from the viewpoint of accuracy that a plurality of sensors 6 for detecting the baggage approaching are distributed around the antenna 15. In the example of FIG. 7, the baggage approach detection sensors 6 and 6 are arranged at two positions facing each other across the area of the antenna 15. Of course, the present invention is not limited to this, and a total of four or more pieces of the baggage approach detection sensors 6 may be arranged so as to sandwich the area of the antenna 15 in the biaxial direction.

Next, the operation of the automatic fare settlement system 300 of the third embodiment will be described.
FIG. 8 is a flowchart showing an operation procedure based on each state of the door opening / closing switch 4, the card approaching detection proximity sensor 5 and the baggage approaching detection sensor 6 in the automatic fare settlement system 300.

  When the bus engine starts, power is supplied to the card reader / writer 1C. Thereafter, when the bus door open / close switch 4 is operated (step 801), a signal of the door open / close switch 4 is output to a door drive mechanism (not shown) to open or close the door simultaneously. Input to the control CPU 11 of the writer 1C.

  The signal of the door opening / closing switch 4 input to the control CPU 11 is stored as door opening information or door closing information in the memory in the control CPU 11 and is held until a different signal is input from the door opening / closing switch 4 again. That is, the memory in the control CPU 11 always holds information indicating the door open / closed state.

  When the door is open, that is, when the door opening information is held in the memory in the control CPU 11 (YES in step 802), if any object such as the IC card 2 approaches the surface of the antenna 15, the card approach detection is performed. A card approach detection signal is sent from the proximity sensor 5 to the control CPU 11 (YES in step 803). Here, the control CPU 11 confirms the output of the baggage approach detection sensor 6, and when no object approaching the periphery of the surface of the antenna 15 is detected (NO in step 804), the power supply circuit 12. In response to this, a control signal for turning on the power supply to the transmission circuit 13 is output. As a result, power supply from the power supply circuit 12 to the transmission circuit 13 is turned on, radio wave emission from the antenna 15 is started (step 805), and communication between the card reader / writer 1C and the IC card 2 is started. Is done.

  When the host device 3 detects that the communication between the card reader / writer 1C and the IC card 2 has started, it issues an instruction to the card reader / writer 1C to read the information recorded in the IC card 2, and the card reader / writer 1C reads information from the IC card 2 in response to the instruction, and transfers the information to the host device 3. As a result, the host device 3 performs processing such as fare settlement based on the information transferred from the card reader / writer 1C.

  When processing such as fare settlement is completed in the host device 3 and the IC card 2 is separated from the antenna 15, transmission of the card approach detection signal from the card proximity detection proximity sensor 5 to the control CPU 11 is stopped, and control When the reception of the card approach detection signal is stopped (NO in step 803), the CPU 11 outputs a control signal for turning off the power supply to the transmission circuit 13 to the power supply circuit 12. As a result, power supply from the power supply circuit 12 to the transmission circuit 13 is turned off, and emission of radio waves from the antenna 15 is stopped (step 806).

  When an object approaching the periphery of the surface of the antenna 15 is detected by the luggage approach detection sensor 6 in step 804 (YES in step 804), the control CPU 11 A control signal for turning off the power supply to the transmission circuit 13 is output to stop radio wave radiation from the antenna 15 (step 806). That is, when the door is open in step 802 and the card approach detection signal is output from the bag approach detection sensor 6 even if the card approach detection signal 5 is output from the card approach detection proximity sensor 5 in step 803. The radio wave radiation from the antenna 15 is stopped.

  As described above, according to the third embodiment, even when the door is in the open state and the approach of the object to the antenna 15 is detected by the card proximity detection proximity sensor 5, the load proximity detection sensor 6. When the approach of the object to the periphery of the surface of the antenna 15 is detected, the radio wave emission from the antenna 15 is stopped, so that when the passenger's body or luggage accidentally approaches the antenna 15, Unnecessary communication with the passenger's IC card can be prevented, and errors such as multiple clearing and misclearing can be prevented.

  In each of the above embodiments, the signal indicating the open / closed state of the door and the detection signal of each proximity sensor have been described as being configured to be input by the read / writer device. However, the host device inputs these signals and controls them. It may be configured.

  As described above, the embodiment in the case where the present invention is used for bus fare settlement has been described. However, the present invention is not limited to use on a bus, and other transportation means such as a train can be used in a vehicle. It can be applied to fare settlement and reserved seat reservation. Further, the contactless IC card reader / writer device of the present invention can be used not only as a means of transportation such as a bus or train but also as a device for admission clearing in a venue where many people gather.

  Further, the present invention is not limited to the configuration shown in the above-described embodiment, and it is needless to say that various changes and modifications can be made without departing from the technical scope described in the claims.

FIG. 1 is a block diagram showing the configuration of the entire automatic fare clearing system using the non-contact IC card reader / writer device according to the first embodiment of the present invention. It is a flowchart which shows the procedure of the operation | movement based on the state of the door opening / closing switch in the automatic fare settlement system of 1st Embodiment. It is a block diagram which shows the structure of the whole automatic fare clearing system using the non-contact IC card reader / writer apparatus concerning the 2nd Embodiment of this invention. It is a top view which shows the example of installation of the proximity sensor in the non-contact IC card reader / writer apparatus of FIG. It is a flowchart which shows the procedure of the operation | movement based on the state of a door opening / closing switch and a proximity sensor in the automatic fare settlement system of 2nd Embodiment. It is a block diagram which shows the structure of the whole automatic fare clearing system using the non-contact IC card reader / writer apparatus concerning the 3rd Embodiment of this invention. It is a top view which shows the example of installation of the proximity sensor for card | curd approach detection, and the sensor for package approach detection in the non-contact IC card reader / writer apparatus of FIG. It is a flowchart which shows the procedure of the operation | movement based on each state of the door opening / closing switch in the automatic fare clearing system of 3rd Embodiment, the proximity sensor for card | curd approach detection, and the sensor for package approach detection.

Explanation of symbols

    1A, 1B, 1C ··· Card reader / writer, 2 ··· Non-contact IC card, 3 ··· Host device, 4 ··· Door open / close switch, 5 ··· Proximity sensor (card approach Detection proximity sensor), 6... Bag proximity detection sensor, 11... Control CPU, 12... Power circuit, 13. 15 ... Antenna, 100, 200, 300 ... Automatic fare clearing system.

Claims (5)

An antenna for transmitting and receiving data in a contactless manner with a contactless IC card;
A signal corresponding to opening / closing of the door that the user carrying the non-contact IC card enters / exits is input, and when the door is open, radio waves are radiated from the antenna, and when the door is closed, the antenna A non-contact type IC card reader / writer device comprising: control means for controlling the emission of radio waves to be stopped. Further comprising detection means for detecting the approach of an object to the antenna;
The control means performs control to radiate radio waves from the antenna on the condition that the door is open and the detection means detects the approach of the object to the antenna. The non-contact type IC card reader / writer device according to claim 1. First detecting means for detecting an approach of an object to the antenna;
Further comprising second detection means for detecting the approach of an object around the detection range of the first detection means,
The control means, on the condition that the door is open, the first detection means detects the approach of the object, and the second detection means does not detect the approach of the object. 2. The non-contact type IC card reader / writer device according to claim 1, wherein control is performed so that radio waves are radiated from an antenna. A method for controlling a non-contact type IC card reader / writer device having an antenna that transmits and receives data without contact with a non-contact type IC card,
A signal corresponding to opening / closing of the door that the user carrying the non-contact IC card enters / exits is input, and when the door is open, radio waves are radiated from the antenna, and when the door is closed, the antenna A control method for a non-contact type IC card reader / writer device, wherein control is performed so that radio wave emission is stopped. In a data communication method for communicating data via an antenna between a non-contact IC card and a non-contact IC card reader / writer device,
A data communication method comprising: stopping data communication via the antenna when a door for a user carrying the non-contact IC card to enter and exit is closed.

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