JPH06103420A - Non-contact ic card type gate device - Google Patents

Abstract

PURPOSE:To provide a non-contact IC card type gate device capable of continuation by re-operation and capable of completing communication by the re- operation even if abnormality due to the uncompletion of the communication occurs. CONSTITUTION:In the gate device in which a gate with a fixed station 20 capable of communicating with a non-contact IC card 30 presented to a communicable area is provided and the non-contact IC card 30 having received a challenge signal repeated periodically by the station 20 executes a series of the communication with the station 20 and informs of the permission/inhibition of the passing of the gate, it is characterized as follows. The non-contact IC card 30 presented to the communicable area erects a communication permission flag '1', and starts the communication, and the station 20 having received a communication completion signal from the non-contact IC card 30 transmits a communication inhibition command, and the non-contact IC card 30 having received the communication inhibition command erects a communication inhibiton flag '0' instead of the communication permission flag.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a contactless IC card provided in a communication area and a gate having a station capable of communication, and the station receives the interrogation signal repeated at a predetermined cycle. The present invention relates to a contactless IC card type gate device in which an IC card communicates with the above-mentioned station as required to notify permission / non-permission of passage through a gate.

[0002]

2. Description of the Related Art In recent years, a memory has been built in together with a microcomputer or the like to allow the card itself to have a data processing capability, and the storage capacity has been dramatically increased as compared with a magnetic card.
A non-contact IC card has been developed that allows wireless communication with an external device.

A typical example of this non-contact IC card is
When placed in the field of vibration energy generated by an external device (for example, an induction magnetic field caused by electromagnetic waves), the vibration energy is absorbed by a wave receiver such as an antenna and converted into electric power.
The data or command included in the vibration energy is taken out and signal-processed, the data is changed or added, or the identification code or the data read process based on the read command is executed, and the data is returned to the external device.

A gate device such as a ticket gate at a station when a non-contact IC card of this kind is used for a commuter ticket or the like is to have a wireless conversation with the commuter ticket or the like as shown in FIG.

In FIG. 5, reference numeral 10 is a gate of the ticket gate, which houses the fixed station 20 shown in FIG. In FIG. 5, reference numeral 11 is a determination display unit. Reference numeral 30 denotes a non-contact IC card held by the passenger M, which has a built-in circuit as shown in FIG.

In this configuration, the fixed station 20 repeatedly emits the interrogation signal (trigger signal) So from the transmission / reception antenna (loop antenna) 21 at a constant short cycle (several tens of ms). When the non-contact IC card 30 is inserted into the communication area (within 25 cm above the antenna) as shown in FIG. 5, the non-contact IC card 30 receives the interrogation signal (trigger) as shown in the communication chart of FIG. signal)
After receiving So, demodulating it by the demodulation circuit 32, decoding it by the control circuit 33, and transmitting a response signal Q, fixed data such as the departure / arrival stations, transit stations, and the usable period stored in the memory 34 is predetermined. In the order of, the data is modulated by the modulation circuit 35, and the transmitting / receiving antenna (loop antenna)
It is discharged through 31. The fixed station 20 that receives the signal carrying this data demodulates it in the demodulation circuit 22 and sends it to the control circuit 23. The control circuit 23 verifies the data with the verification data stored in the memory 24, and the passengers pass through. The permission / non-permission of is determined. When the passage is permitted, the fact and a necessary command are transmitted to the non-contact IC card 30 through the modulation circuit 25 and the transmission / reception antenna (loop antenna) 21. Upon receiving this signal, the non-contact IC card 30 performs a series of processes based on the above-mentioned command (variable use date, use time, use station, etc. or write update data, etc.), and notifies the end of the process to the fixed station. Reply to 20. The fixed station that has received this reply displays the passage permission on the determination display unit 11.

[0007]

By the way, the transmitting / receiving antenna (loop antenna) 21 is long enough to secure the time required to complete the series of communication with the non-contact IC card 30 of one passenger passing by while walking through the gate. However, in consideration of the stagnation of the person who passes through the gate and various attitudes of the presented card, the above series of communications with the non-contact IC card 30 of one passenger can be performed even under the worst conditions. Since it is enlarged with a margin to complete it, there may be a case where there are multiple cards in the communication area.

When a plurality of cards enter the communication area, a plurality of cards respond in synchronization with the interrogation signal (trigger signal) So, which may cause interference. Cards are programmed to never respond together.

However, when a card that has already been communicated exists in the communication area and a card is newly inserted in the communication area, the next interrogation signal (trigger signal) So
Interference will occur not only with the newly presented card but also with the already communicated cards.

The present invention has been made to solve this problem, and an object of the present invention is to provide a non-contact IC card type gate device which can prohibit re-communication with the same card at the same gate.

[0011]

In order to achieve the above object, the present invention provides a gate having a station capable of communicating with a contactless IC card provided in a communicable area. In the gate device, which receives the interrogation signal repeated at a predetermined cycle, the non-contact IC card communicates with the station in series to notify permission / non-permission of passage through the gate,
The non-contact IC card provided in the communicable area sets a communication permission flag to start communication, and the station which has received the communication completion signal from the non-contact IC card transmits a communication prohibition command and the communication prohibition command. The non-contact IC card that has received the message has a communication prohibition flag set instead of the communication permission flag.

In the second aspect, the communication prohibition command is generated in the card based on the communication completion signal.

According to another aspect of the present invention, the gate station transmits the transmission data by FSK-modulated waves and transmits the data, and the contactless IC card includes a power supplyless contactless IC card including a control power generation circuit that extracts control power from the received wave. Wherein a voltage comparison unit that outputs when the output of the power generation circuit exceeds a set voltage, and a flip-flop that is set by the output of the voltage comparison unit and that is reset by a communication completion signal output by the control circuit,
A gate element gated by the output of the flip-flop and passing demodulated data to the control circuit is provided.

[0014]

In the present invention, when the communication is completed, the card switches the communication permission flag to the communication prohibition flag. Therefore, the communication-completed card which has once completed communication with the station of the gate in the gate,
Do not re-contact the station at the gate.

[0015]

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

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the gate device of this embodiment is of an electromagnetic induction communication system, and the non-contact IC card 30 has a control power generation circuit 36, and this control power generation circuit 36.
Generates weak control power from the electromagnetic energy of the electromagnetic wave (FSK modulated wave) received by the antenna 31. Figure 2
Shows the transmission data and the FSK modulated wave. Since the FSK modulated wave is continuous as shown in the figure, DC power can be obtained by smoothing. A voltage comparator 37 compares the voltage E output from the control power generation circuit 36 with a set voltage (card operating voltage) Eo, and generates an "H" level signal when E> Eo. Reference numeral 38 denotes a flag flip-flop, which is set by the above-mentioned "H" level signal from the voltage comparison unit 37 and reset by the output of the control circuit 33 (communication processing completion signal). 39 is a gate element.

FIG. 3 shows the waveform of each part. (A)
Is the output of the voltage comparator 37, (b) is the communication completion signal,
(C) is a set output of the flip-flop 38, which is "H"
The level is a communication permission flag, and the “L” level is a communication prohibition flag.

Next, the operation of this embodiment will be described with reference to the communication chart in FIG.

The fixed station 20 repeatedly emits an interrogation signal (trigger signal) So from a transmission / reception antenna (loop antenna) 21 at a constant short cycle (several 10 ms).
When the contactless IC card 30 is inserted into the communication area (within 25 cm above the antenna), the contactless IC card 3
On the 0 side, operating power is secured by the control power generation circuit 36, the flip-flop 38 is set at the rising edge of the output of the voltage comparison unit 37, and its output becomes "1" (communication permission flag). As shown in the communication chart of FIG. 4, the contactless IC card 30 has the interrogation signal (trigger signal).
So is received and demodulated by the demodulation circuit 32. Since the gate of the gate element 39 is opened, the demodulated data is decoded by the control circuit 33 and the response signal Q is transmitted. Non-contact I
The C card 30 reads out fixed data such as a departure / arrival station, a transit station and a service period stored in the memory 34 in a predetermined order based on a read command from the fixed station 20 and modulates the fixed data by a modulation circuit 35. It emits through a transmitting / receiving antenna (loop antenna) 31. The fixed station 20 that receives the signal carrying the fixed data demodulates it in the demodulation circuit 22 and sends it to the control circuit 23. The control circuit 23 compares the fixed data with the verification data stored in the memory 24, and the passengers The permission / non-permission of passage is determined. In the case of permitting passage, a message to that effect and a required command (write command etc.) is transmitted to the non-contact IC card 30 through the modulation circuit 25 and the transmission / reception antenna (loop antenna) 21. Upon receiving this signal, the non-contact IC card 30 performs a series of processes based on the above command, for example, a process of writing variable data such as card usage date, usage time, and station used in the memory 34 to fix the communication completion signal. Reply to station 20. When this communication completion signal is generated, the flip-flop 38 is reset and the communication permission flag is switched to the communication prohibition flag "0".
The gate element 39 closes the gate. Therefore, the card 30
Does not communicate with the fixed station 20 even if it receives the interrogation signal (trigger signal) So. As described above, in this embodiment, since the communication is permitted at the rising edge of the voltage comparison unit 37 and the communication is prohibited by the communication completion signal, after the card 30 enters the communicable area and the communication is once completed, the communication is continued as it is. Even if you stay in the possible area, there is no risk of re-communication.

In the above embodiment, the communication enable signal is switched to the communication prohibition flag "0" by the communication completion signal generated by the control circuit 33. However, when the fixed station 20 receives the communication completion signal, the communication is completed. The prohibition command may be transmitted to the non-contact IC card 30, and the control circuit 33 of the non-contact IC card 30 that has received the communication prohibition command may generate the reset signal.

The non-contact IC card 30 of this embodiment is a power-less (battery-less) type card.
It can also be applied to the type of card with the power supply shown in.

[0023]

As described above, according to the present invention, when the communication is completed, the card switches the communication permission flag to the communication prohibition flag, so that the communication card which has once completed communication with the station of the gate in the gate. Will not re-communicate even if it stays in the communicable area of the gate,
Interference does not occur even when a new card is inserted, and reliability can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing an FSK modulated wave.

FIG. 3 is a waveform diagram of each part in the above embodiment.

FIG. 4 is a communication chart in the above embodiment.

FIG. 5 is a schematic view of a conventional non-contact IC card type gate device.

FIG. 6 is a conventional circuit configuration diagram of a non-contact IC card type gate device.

FIG. 7 is a communication chart in the above conventional example.

[Explanation of symbols]

 10 gate 20 fixed station 30 non-contact type IC card 36 control power generation circuit 37 voltage comparison unit 38 flip-flop 39 gate element

Claims (3)

[Claims] 1. A non-contact IC provided in a communicable area
The contactless I including a gate having a station capable of communicating with the card and receiving an interrogation signal repeated at a predetermined cycle by the station.
In the gate device in which the C card makes a series of communications with the above station and notifies permission / non-permission of passage through the gate, the contactless IC card presented in the communicable area sets a communication permission flag to start communication, The above-mentioned station that has received the communication completion signal from the non-contact IC card transmits a communication prohibition command, and the above-mentioned non-contact IC card that has received the communication prohibition command sets a communication prohibition flag instead of the communication permission flag. Non-contact IC card type gate device. 2. The contactless IC card type gate device according to claim 1, wherein the communication prohibition command is generated in the card based on a communication completion signal. 3. The contactless IC card is a powerless contactless IC card having a control power generation circuit for extracting control power from a received wave, wherein the station of the gate transmits the transmission data by FSK-modulated wave. And a voltage comparison unit that outputs when the output of the power generation circuit exceeds a set voltage, and a flip-flop that is set by the output of the voltage comparison unit and that is reset by a communication completion signal output by the control circuit. The non-contact IC card type gate device according to claim 1 or 2.