JPH06111085A - Noncontact storage medium - Google Patents

Abstract

PURPOSE:To prevent interference from occurring and to improve reliability for communication by selecting the communication by a mutual communication means by a switching means when ordinary data ccommunication is performed. CONSTITUTION:Either the mutual communication means which transmits/receives data alternately between a medium processor 2 corresponding to a command included in the data transmitted from the medium processor or a unidirectional communication means which performs only the reception of the data transmitted from the medium processor 2 is set as valid selectively. When a noncontact storage medium 1 is used in an ordinary state as a commutation ticket or a tag for FA(factory automation), the noncontact storage medium 1 performs the transmission/reception of command data and response data between a medium reader/writer 2 that is the medium processor 2 alternately, thereby, the interference of the data can be prevented from occurring in advance. and also. the reliability for the communication can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contactless storage medium such as a card or a tag for wirelessly transmitting and receiving data to and from a medium processing device such as a passgate.

[0002]

2. Description of the Related Art In order to simplify the operation of passers-by at a passgate that constitutes a ticket gate of a station, a storage medium such as a commuter ticket presented at the passgate is used to transmit and receive data wirelessly to and from the passgate. A contact type storage medium has been proposed. In a non-contact storage medium that wirelessly transmits and receives such data, wireless communication of data is performed by a handshake function in order to prevent occurrence of interference with the medium processing device and to improve communication reliability. I am trying. That is, the contactless storage medium receives a command transmitted from the medium processing device, executes a process corresponding to the command, and then transmits a response from the contactless storage medium to the medium processing device, so Data is alternately transmitted and received to and from the contact storage medium. Therefore, even when a plurality of non-contact storage media exist in the communicable area of the medium processing device, a single non-contact storage medium selected by a priority condition such as the communication being started first Data is transmitted and received only to and from the medium processing device.

[0003]

However, in the above-mentioned conventional non-contact storage medium, the wireless transmission / reception of data to / from the medium processing device is always performed by the handshake function, and therefore the data is transmitted from the medium processing device. Since the data was made to be able to be received only by a single non-contact storage medium, it was not possible to simultaneously receive the data transmitted from the medium processing device in a plurality of non-contact media. Therefore, for example, in the writing process of the initial data common to all the non-contact storage media usable in one passgate system, the same initial data is written to the plurality of non-contact storage media, There is a problem that the initial data can be written only to a single non-contact storage medium at one time and the work takes a long time.

An object of the present invention is to provide a method of alternately transmitting and receiving data to and from a medium processing device by a handshake function in a non-contact storage medium, and a system of only receiving data transmitted from the medium processing device. To provide a non-contact storage medium that can be selected and can receive the same data in a plurality of non-contact storage media at the same time and can perform a plurality of processes such as writing initial data and erasing memory data at the same time. It is in.

[0005]

The non-contact storage medium of the present invention is a non-contact storage medium that wirelessly transmits and receives data to and from a medium processing device, and alternately exchanges data with the medium processing device by a handshake function. Switching means for selectively switching between mutual communication means for transmitting and receiving data, one-way communication means for only receiving data transmitted from the medium processing device, and communication by mutual communication means or communication by one-way communication means. And are provided.

Further, the switching means includes a switching command receiving means for receiving the switching command data transmitted from the medium processing device, and when the switching command receiving means receives the switching command, it is unidirectional from the communication by the mutual communication means. The communication mode is switched to communication.

[0007]

According to the present invention, the switching means selects the method of alternately transmitting and receiving the data with the medium processing apparatus by the handshake function and the method of only receiving the data transmitted from the medium processing apparatus. . Therefore, by selecting the communication by the mutual communication means by the switching means during normal data communication, the occurrence of interference can be prevented and the reliability of communication can be improved. On the other hand, when transmitting the same data to a large number of non-contact storage media, by selecting the communication by the one-way communication means in the non-contact storage medium, the same data is simultaneously transmitted in a plurality of non-contact storage media. Be received.

[0008]

1 is a block diagram showing the configuration of a control unit of a non-contact storage medium according to an embodiment of the present invention. The control unit of the non-contact storage medium 1 is composed of a CPU 11 having a ROM 12 and a RAM 13. This CPU11
The transmission / reception circuit 16 is connected to the interface circuit 17 via the interface circuit 17. The transmission / reception circuit 16 includes an antenna 19 and transmits / receives data to / from a medium processing device described later. A program defining the operation of the CPU 11 is written in the ROM 12 in advance, and the CPU 11 executes the processing operation according to the program. Data input / output during this time is stored in the RAM 13. Also, the CPU 11
An EEPROM 14 is connected to the. This EEPR
When the medium processing device is a gate device, the OM 14 stores data for passage permission / prohibition determination. Transmitter / receiver circuit 16
Receives a power transmission wave from the medium processing device and outputs this power component to the power supply circuit 18. The power supply circuit 18 supplies the electric power input from the transmission / reception circuit 16 to the electronic components.

FIG. 2 is a block diagram showing the configuration of the control unit of the medium processing apparatus that transmits and receives data to and from the non-contact storage medium. As an example, the figure shows the configuration of a medium reader / writer provided in a pass gate such as a ticket gate. The control unit of the medium reader / writer 2 is composed of a CPU 21 having a ROM 23 and a RAM 24. The CPU 21 has interface circuits 25-2.
A display driver 29, a transmission / reception circuit 30, and a communication control circuit 31 are connected via 7. Display driver 2
9 includes a display device 33, and drives the display device 33 in accordance with the display data output from the CPU 21. The transmission / reception circuit 30 includes an antenna 34, and transmits / receives data to / from the non-contact storage medium 1. This transmitting / receiving circuit 30
In addition, the electric power transmission wave is transmitted from the antenna 34 to the non-contact storage medium 1. The communication control circuit 31 inputs / outputs data from / to a control unit of a passgate device which is a higher-level device. The CPU 21 stores the ROM 23 in accordance with the command data input from the host device via the communication control circuit 31.
The transmission / reception of data with the non-contact storage medium 1 is controlled based on a program stored in advance. Data input / output during this time is stored in the storage area of the RAM 24.

FIG. 3 is a diagram showing a data transmission / reception state between the non-contact storage medium and the medium reader / writer. The medium reader / writer 2 includes an antenna 34 exposed on the upper surface of a pass gate device, which is a higher-level device, and transmits / receives data to / from the non-contact storage medium 1 existing in the communicable area of the antenna 34. At this time, the medium reader / writer 2 transmits a command to the non-contact storage medium 1, and the non-contact storage medium 1 executes the processing operation according to this command. The execution result of this processing operation is transmitted from the non-contact storage medium 1 to the medium reader / writer 2 as response data.

FIG. 4 is an external view showing a state at the time of writing initial data in the non-contact storage medium. The data writing device 3 includes a U-shaped antenna 41. A substantially uniform magnetic field is generated in the concave portion 42 of the antenna 41 and is hardly affected by an external electromagnetic field.
A plurality of non-contact storage media 1 are stacked and stored in the recess 42. The same initial data is transmitted from the data writing device 3 to the plurality of contactless storage media 1, and each contactless storage medium 1 receives this initial data.

FIG. 5 is a diagram showing a communication format of a command transmitted from the medium reader / writer to the non-contact storage medium. The medium reader / writer 2 is the first
The contactless storage medium 1 that has transmitted the D code is specified and the command is transmitted. The command transmitted at this time is an ID code for specifying the non-contact storage medium, a command defining a process to be executed in the non-contact storage medium 1, and an address designation or a memory of the memory from which data is read in the non-contact storage medium 1. It consists of data to be written to.

On the other hand, the command data transmitted from the data writing device 3 shown in FIG. 4 to the contactless storage medium 1 has an ID code common to the front contactless storage medium 1. Therefore, the command data transmitted from the data writing device 3 is transmitted without specifying the non-contact storage medium 1 which should receive the command data.

FIG. 6 is a flow chart showing a processing procedure in the control unit of the non-contact storage medium. The CPU 11 of the contactless storage medium 1 is activated when the contactless storage medium 1 exists in the communicable area of the medium reader / writer 2 or the data writing device 3 and receives the electric power carrier waves transmitted from these medium processing devices. To do. After starting, the CPU 11 determines whether or not data is transmitted from the medium processing device (n1),
When data is transmitted from the medium processing device, this is received (n2). When the reception of the data transmitted from the medium processing device is completed (n3), the content of the command is analyzed (n4), and it is determined whether or not the command included in the received data is the initial setting selection command (n5). ).
When the command included in the transmitted data is not the initial setting selection command, the process according to the content of the command is executed (n6), and the result is transmitted as response data to the medium processing device (n7). The processing of n5 to n7 is processing performed in data transmission / reception with the medium reader / writer 2, and is communication processing by the handshake function.

On the other hand, when the command included in the received data is the initial setting selection command, the initial setting process is performed (n8). For example, when the contactless storage medium 2 is a commuter pass used at a ticket gate of a station, the initial setting process is performed when the commuter pass is issued, such as setting the electric railway code or issuing station name code and erasing memory data. This is the process performed. Further, when the non-contact storage medium 1 is a tag for FA (factory automation), the initial setting process in n8 is a line change process such as a write process for a product code and a part code, or a memory data erase process. This is the process that is sometimes executed. The process of n5 → n8 is executed in the data communication with the data writing device 3.

In the above processing, n6 and n7 correspond to the mutual communication means of the present invention, n8 also corresponds to the one-way communication means, and n5 corresponds to the switching means.

According to the above processing, in this embodiment, mutual communication means for alternately transmitting / receiving data to / from the medium processing device in response to a command included in the data transmitted from the medium processing device, or medium processing Any one-way communication means that only receives data transmitted from the device is selectively enabled. When the non-contact storage medium 1 is used in a normal state as a commuter pass or a tag for FA, the non-contact storage medium 1 exchanges command data and response data with the medium reader / writer 2 which is a medium processing device. By alternately transmitting and receiving, it is possible to prevent the occurrence of data interference and to improve the reliability of communication. On the other hand, when the contactless storage medium 1 is initialized, only the command data is transmitted from the data writing device 3 which is a medium processing device, and the response data is transmitted from the contactless storage medium 1 to the data writing device 3. Never be done. Therefore, the data writing device 3 can simultaneously transmit the same data to the plurality of contactless storage media 1, and at the same time, the command data transmitted from the data writing device 3 in the plurality of contactless storage media 1 can be transmitted. The processes specified by can be executed simultaneously. Further, since switching between the communication by the mutual communication means and the communication by the one-way communication means is performed by receiving the switching command data transmitted from the medium processing device, a switch etc. for switching the communication system is used. There is no need to install it in.

[0018]

According to the present invention, the method of alternately transmitting and receiving data to and from the medium processing apparatus and the method of only receiving the data transmitted from the medium processing apparatus are selectively switched and executed. Therefore, it is possible to prevent interference and improve the reliability of communication by alternately transmitting and receiving data to and from the medium processing device during normal use. When performing a common process on the non-contact storage medium, it is not necessary to specify the destination of the data in the medium processing device so that only the data is received, and at the same time, the non-contact storage medium is stored in the plurality of non-contact storage media. It is possible to transmit the same data to each other, and it is possible to facilitate the processing such as initial setting and shorten the processing time.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a control unit of a non-contact storage medium that is an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a control unit of a medium processing device that transmits and receives data to and from the non-contact storage medium.

FIG. 3 is an external view showing a usage state of the non-contact storage medium.

FIG. 4 is a diagram showing another usage state of the non-contact storage medium.

FIG. 5 is a diagram showing a communication format of data transmitted from the medium processing device to the contactless storage medium.

FIG. 6 is a flowchart showing a processing procedure in a control unit of the non-contact storage medium.

[Explanation of symbols]

 1-Non-contact storage medium 2-Media reader / writer (medium processing device) 3-Data writing device (medium processing device)

Claims (2)

[Claims] 1. A non-contact storage medium for wirelessly transmitting and receiving data to and from a medium processing device, and a mutual communication means for alternately transmitting and receiving data to and from the medium processing device by a handshake function, and a transmission from the medium processing device. One-way communication means for only receiving the received data,
A non-contact storage medium provided with switching means for selectively switching between communication by mutual communication means and communication by one-way communication means. 2. The switching means comprises switching command receiving means for receiving switching command data transmitted from the medium processing device, and when the switching command receiving means receives the switching command, it is unidirectional from the communication by the mutual communication means. The non-contact storage medium according to claim 1, wherein the communication is switched to communication.