JPH06103421A - Non-contact ic card type gate device - Google Patents

Abstract

PURPOSE:To provide a non-contact IC card type gate device which can continue communication by re-operation and can complete the 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 station capable of communicating with a non-contact IC card presented to a communicable area is provided, and the non-contact IC card having received a challenge signal repeated at a prescribed period by the corresponding station executes a series of the communication with the station and informs of the permission/non- permission of the passing of the gate, it is characterized as follows. The non- contact IC card is provided with two switchable data memories 341, 342 in which the same fixed data is written, and simultaneously, it is provided with a data memory switch flag 343 to be inverted automatically at every completion of the series of the communication, and the read-out of data from the memories 341, 342 is executed from the data memory corresponding to the contents of the flag 343, and the write-in of the data is executed to the other memory.

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.

When a non-contact IC card of this kind is used for a commuter ticket, a gate device such as a ticket gate at a station will have a wireless conversation with the commuter ticket as shown in FIG.

In FIG. 7, reference numeral 10 denotes a gate of a ticket gate, which houses the fixed station 20 shown in FIG. In FIG. 7, 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. 7, the non-contact IC card 30 receives the interrogation signal (trigger signal) 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.

A transmitting / receiving antenna (loop antenna)
Reference numeral 21 is long enough to secure the time required to complete the series of communications with the non-contact IC card 30 of one passenger passing through the gate.

[0008]

The time required to complete the above series of communications is about 0.1 to 0.2 seconds, but depending on the flow condition of people passing through the gate and the card presenting posture, the communication area is There is a case where only the surroundings are momentarily held up. In such a case, the communication time is insufficient, the series of communication cannot be completed, and a communication abnormality occurs. If this kind of situation occurred while reading the fixed data (departure / arrival station, transit station, service period, etc.) from the contactless IC card 30, "Please pass through the communication area again"
It is possible to continue the re-operation by instructing the re-operation and so on. However, when the above-mentioned variable data is being written in the memory 34 of the non-contact IC card 30, the write data may be old or new and reliability may be deteriorated. Since there is no data, continuation by re-operation is useless, and the non-contact IC card 30 cannot be used.

In order to prevent this, the loop antenna may be enlarged to allow a sufficient communication time. However, if the communication area becomes large, a problem of interference with other cards will occur.

The present invention has been made to solve this problem. Even if an abnormality occurs due to incomplete communication, re-operation can be continued and communication can be completed by re-operation. It is an object to provide an IC card type gate device.

[0011]

In order to achieve the above object, the present invention provides, in claim 1, 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 same non-contact IC card has the same fixed data written 2
It has two data memories that can be switched, and has a data memory switching flag that is automatically inverted every time the series of communication is completed. Reading from the memory is performed from the data memory corresponding to the contents of the flag and written. Is configured for the other data memory.

According to a second aspect of the present invention, the non-contact IC card transmits the response signal transmitted in response to the received interrogation signal with the present flag contents of the data memory switching flag, and the station of the gate: A data memory corresponding to the contents of the flag is designated to communicate with the non-contact IC card.

According to a third aspect of the present invention, the non-contact IC card has a circuit which inverts the data memory switching flag each time a series of communications is completed and has a circuit for designating the data memory corresponding to the inverted flag. .

According to a fourth aspect of the present invention, the station at the gate is provided with a display section for instructing re-operation when an abnormality in communication is detected.

[0015]

According to the present invention, until the series of communication is completed, the fixed data is read from the memory part designated by the flag, and the variable data is written from the gate side to the other memory part. Will be performed.

[0016]

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

[First Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 340 is a data memory, which is divided into an X memory section 341, a Y memory section 342, and a flag memory section 343, as shown in FIG. A memory address control circuit 344 exchanges signals with the control circuit 33. X memory unit 341 and Y
The memory section 342 is composed of a read-only fixed data area and a read / write variable data area. The same data is written in the fixed data areas of both the memory sections 341 and 342. In this example,
The flag “0” is assigned to the X memory unit 341,
The flag “1” is assigned to the Y memory unit 342.

Next, the operation of this embodiment will be described with reference to the operation flowchart of the control circuit 24 shown in FIG. 5 and the communication chart of FIG.

Now, it is assumed that the switching flag "0" is stored in the flag memory unit 343.

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 non-contact IC card 30 is inserted into the communication area (within 25 cm above the antenna), the non-contact IC card 30 receives the interrogation signal (trigger signal) as shown in the communication chart of FIG. ) So is received, demodulated by the demodulation circuit 32, decoded by the control circuit 33, and the response signal Q is transmitted. At this time, in this embodiment, the flag “0” is read from the flag memory unit 343, and the response signal Q
Is transmitted with this flag "0". The fixed station 20 designates the X memory unit 341 from the flag “0” and transmits a read command (read command) to the X memory unit 341. Based on the read command from the fixed station 20, the non-contact IC card 30 reads fixed data such as a departure / arrival station, a transit station and a service period stored in the X memory unit 341 of the memory 340 in a predetermined order, and the fixed data is read. The transmitting / receiving antenna (loop antenna) 3 by modulating the
1 through. The fixed station 20 that receives the signal carrying the fixed data demodulates it in the demodulation circuit 22 and controls the control circuit 23.
Then, the control circuit 23 collates the fixed data with the collation data stored in the memory 24, and determines whether or not the passenger is allowed to pass. In the case of permitting passage, a message to that effect and a required command (write command and information to be written in the Y memory unit) are transmitted to the non-contact IC card 30 through the modulation circuit 25 and the transmission / reception antenna (loop antenna) 21. Upon reception of this signal, the non-contact IC card 30 performs a series of processes based on the above-mentioned command, for example, a process of writing variable data such as the card use date, use time, and use station to the Y memory unit 342, and the process is completed. The information is sent back to the fixed station 20. At the fixed station 20 that received this reply,
Send the flag switching command. Thereby, the non-contact IC card 30 performs the flag inversion (sets the content of the flag memory unit 343 to "1").

In this embodiment, (1) non-contact IC card 3
When the reading of the fixed data from 0 is not completed within the predetermined time, (2) When the writing process to the Y memory unit 342 (or the X memory unit 341) based on the instruction from the fixed station 20 is not completed within the predetermined time. (3) When the time from this point to the flag inversion exceeds a predetermined time, the fixed station 20
Is abnormal (communication is not completed) and generates an abnormal signal, and as shown in FIG.
Displays a message requesting / instructing re-operation.

According to this instruction, when the passenger M again presents the non-contact IC card 30 to the communication area, since the flag is not inverted, the switching flag "0" is read from the flag memory unit 343 and the response signal Q is returned. This switching flag "0" is placed and transmitted, and the same processing sequence as above is repeated.

In the present embodiment, the fixed data of the memory 340 is read from the memory section designated by the flag, and the variable data (updated data) is written to the other memory section. Even if you do
The old and new data as described above are never written in a mixed manner.

[Second Embodiment] FIG. 3 shows a second embodiment of the present invention, in that it has an address switching circuit 345 and a flag generator (for example, a flip-flop) 346. 2 is different from the first embodiment shown in FIG. The communication chart of this embodiment is shown in FIG.

In this embodiment, when the flag is "0", the address switching circuit 345 selects the X memory unit 341, and when the switching flag is inverted to "1", the address switching circuit 345 is the X memory unit 341. Select.

In this case, the switching flag is inverted by the control circuit 33 switching to the flag generating unit 346 when the writing of the variable data into the X memory unit 341 or the Y memory unit 342 is completed in the non-contact IC card 30, for example. Command,
The content of this flag is not included in the response signal Q.

By doing so, it is not necessary to carry the flag "0" or "1" on the response signal Q, and the fixed station 20 side does not need to judge the switching flag, and the program is simplified accordingly.

[0029]

As described above, the present invention has two memory units in which the same fixed data is written, and data is read from the memory unit designated by the flag until a series of communication is completed. , Data is written to the other memory section, so if an error occurs due to incomplete communication, the memory operation just before the error occurred can be reproduced even if the operation is performed again. You can continue to complete the communication without fear of messing around.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a non-contact IC card according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a memory in the above embodiment.

FIG. 3 is a configuration diagram of a memory of a non-contact IC card according to a second embodiment of the present invention.

FIG. 4 is a schematic perspective view of a non-contact IC card type gate device according to the present invention.

FIG. 5 is a flowchart illustrating the operation of the above embodiment.

FIG. 6 is a communication chart in each of the above embodiments.

FIG. 7 is a schematic view of a conventional non-contact IC card type gate device.

FIG. 8 is a conventional circuit configuration diagram of a non-contact IC card type gate device.

FIG. 9 is a communication chart in the above conventional example.

[Explanation of symbols]

 10 gate 11A display unit 20 fixed station 30 non-contact type IC card 340 memory 341 X memory unit 342 Y memory unit 343 flag memory unit 344 memory address control circuit 345 address switching circuit 346 flag generation unit

Claims (4)

[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 same non-contact IC card writes the same fixed data 2
It has two data memories that can be switched, and has a data memory switching flag that is automatically inverted every time the series of communication is completed. Reading from the memory is performed from the data memory corresponding to the contents of the flag and written. Is a non-contact IC card type gate device characterized in that it is performed for the other data memory. 2. The non-contact IC card sends the response signal transmitted in response to the received interrogation signal by putting the present flag contents of the data memory switching flag, and the gate station transmits the flag contents. 2. The non-contact IC card type gate device according to claim 1, wherein a data memory corresponding to is designated to communicate with the non-contact IC card. 3. The non-contact IC card reverses the data memory switching flag each time a series of communications is completed, and
A non-contact IC card type gate device having a circuit for designating a data memory corresponding to an inverted flag. 4. The non-contact IC card type gate device according to claim 1, wherein the gate station is provided with a display unit for instructing re-operation when an abnormality in communication is detected.