JPH0293390A - Data card identification apparatus - Google Patents

Abstract

PURPOSE:To effectively avoid possibility disturbing the identification operation of a data card identification apparatus as a whole by controlling a plurality of readers to an operative state in a time sharing manner. CONSTITUTION:Readers 32A, 32B...32D are controlled so as to be operated in a time sharing manner by the driving signals S1A, S1B S1D of a polling control part 34. Therefore, when one of the readers 32A - 32D, for example, the reader 32A is set to an operative state by the driving signal S1A, a noise radio wave WNZ irradiates the identification card 35D possessed by the passenger passing through the exclusive passage 12B of the adjacent reader 32B. By this method, even if an identification code signal W2B is generated from the card 35B and returned to the reader 32B, since the reader 32B is not in an operative state, it can be avoided that a data card identification apparatus 31 is disturbed as a whole.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention is suitable for application to an identification system that reads identification information.

B. Summary of the Invention The present invention relates to an information card identification device, and by sequentially driving a plurality of readers in a time-sharing manner, accurate identification result information can be obtained from each reader.

C. Prior Art As shown in FIG. 3, a conventional information card reader 1 uses an identification confirmation signal W generated in an identification signal generation circuit 2 made of a 2.45 (GHz) microwave generator, for example.
1 is emitted from the transmitting antenna 3 to the information card 4, and the identification code signal W2 emitted from this information card 4 is returned to the receiving antenna 5 of the reader l, and this identification code signal W2 is transmitted back to the receiving antenna 5 of the reader l.
By performing identification processing in the identification processing circuit 6, it is possible to construct an identification system such as checking entry/exit persons who carry the information card 4 as a person exit card or cargo to which the information card 4 is attached as a tag. It is considered.

Here, as the information card 4, the impedance at the feeding point of the dipole antenna 4A is determined by the identification code generation circuit 4.
A proposal is made in which the identification code signal W2 is emitted by reflecting or absorbing the microwave emitted from the reader l as the identification confirmation signal Wl by changing it according to the identification code information generated in B. (Patent Application No. 63-6292).

The identification code generation circuit 4B has an identification code memory,
By assigning a unique identification code to each information card 4 to be stored in the identification code memory, the reader 1 can reliably check the information held by the information card.

D Problems to be Solved by the Invention However, the identification system having the configuration shown in FIG. 3 has a plurality of partition walls (IIA, 11B) and (
Artificial passageway (12A
, 12B) and exit passages (12c, 12D), when applied to a ticket gate 13 of a train, etc., each 111
It is necessary to provide dedicated readers 14A to 14D for each passage 12A to 12D in order to read the identification code of the information card 4 carried by the passengers who pass through the passage in sequence as a commuter pass or boarding ticket. be.

For example, these readers 14A to 14D are connected to the partition wall 11A-
In addition to being installed so as to be placed on the LID, the passage 12
When the ticket gate identification system 15 is configured to be able to irradiate the information card 4 presented by passengers passing through A to 12D with just the right number of identification signals Wl, each reader 14
Since the radio waves emitted from A-14D as the identification T111 recognition signal W1 are incident on other readers, each reader 14A
-14D may not be able to perform stable reading operations.

Incidentally, if the readers 14A to 14D simultaneously emit the identification confirmation signal Wl and are in an operating state in which they can receive the returned identification code signal Wl, each reader 14A to 14
Even if the radio waves emitted from D are correctly irradiated to the information card 4, the reflected waves may enter other readers, or may reflect from the walls around the ticket gate hall and enter other readers, etc. In reality, the state of radio waves occurring in the space inside the ticket gate hall may be quite complex and random.

In addition, the identification system of FIG. 3 has been replaced by a cargo sorting identification system 24 that recognizes the cargo 22 transported by the conhair 21 by I+I using a plurality of readers 23A to 23D, as shown in FIG. Similar problems may occur in other cases as well.

In this case, a plurality of information cards 25 are pasted and placed on the surface of the cargo 22 in different directions, and at least one It is configured to be able to read the information card 25.

In the cargo sorting identification system 24 having such a configuration, the plurality of readers 23A to 23D simultaneously read the identification f11 recognition signal W.
In the case where the radio waves emitted from each reader 23A to 23D are received by another reader, when the reflected wave of the radio wave emitted from each reader 23A to 23D is received by another reader, as shown in FIG. Problems similar to those described above may occur.

The present invention has been made in consideration of the above points, and attempts to propose an information card identification device that allows the reading operations of each reader to function correctly without confusion in an identification system having a plurality of readers. That is.

E Means for Solving the Problem In order to solve this problem, in the present invention, the information cards 35A to 35 are
A plurality of readers 32A to 32D generate an identification confirmation signal WIA-WID to be emitted to D, and a drive signal 5IA is sequentially and time-divisionally transmitted to the plurality of readers 32A to 32D.
- a polling control unit 34 that supplies the information card 35A to 35 from the plurality of readers 32A to 32D;
The identification result information of D is obtained.

The F-action polling control section 34 moves the plurality of readers 32A to 32D in nine directions.

As a result, the information card 35A of each reader 32A to 32D
As identification result information from ~35D, each reader 32A~
Even if there is noise WNZ such as a reflected wave based on the identification confirmation signals WIA to WID emitted from 32D, it is possible to effectively avoid the possibility of confusing the identification operation as a whole.

G example An embodiment of the present invention will be described in detail below with reference to the drawings.

(G1) First Embodiment In FIG. 1, 31 indicates an information card identification device as a whole, and is composed of a card reading section 33 having a plurality of readers 32A to 32D, for example, four, and a polling control section 34. There is.

In this embodiment, each of the readers 32A-32D has a configuration similar to that described above for reader l of FIG.
It includes an identification signal generation circuit 2 connected to a transmitting antenna 3 and an identification processing circuit 6 connected to a receiving antenna 5, and is used, for example, as the readers 14A to 14D of the ticket gate 13 described above with reference to FIG. The information card 35 emits an identification confirmation signal WIA-WID to the information cards 35A to 35D such as commuter passes or train tickets presented by passengers passing through the exit passages 12A, 12B or 12C and 112D.
Identification code signal W2A- returned from A-35D
It is configured to receive W2D.

As shown in FIG. 2 (A1) to (A4), the polling control unit 34 controls the polling period TPLO time tI, j!
, t, , t4 sequentially readers 32A, 32832C
, 32D drive signals SIA, , SIB, SIC,
SID (Figure 5 (A1), (A2), (A3), (A
4))) is sent repeatedly.

The readers 32A, 32B, 32C132D sequentially read the time t,
~t2, 1t-1, t, ~L4, t4~1. By operating the identification signal generation circuit 2 and the identification processing circuit 6 during the time between,
As shown in 2), (B3), and (B4), the identification confirmation signals WIA, WIB, WIC, and WID are emitted in a time-division manner.

At this time, the identification processing circuit 6 of the readers 32A, 32B, 32C132D recognizes the information cards 35A, 35B, 35C13.
Identification code signals W2A, W2 sent back from 5D
B, W2C, and W2D, if any, are received and their identification codes are determined, and the information card 35A,
35B, 35C, and 35D.

In the case of the above embodiment, the determination signals 52A-32D output from the readers 32A-32D are supplied to the identification information management device 41, and the information cart identification device 31 as a whole is comprehensively evaluated.

In the second configuration, the readers 32A to 32D are controlled to operate in a time-sharing manner by the drive signals 5IA-3ID of the polling control unit 34, so that the readers 32A to 32D are
When one of the readers 2A to 32D is activated, the other readers are not activated, so when one reader, e.g. reader 32A, is activated by the drive signal SIA, the identification confirmation Based on the signal WIA, a noise radio wave WNZ generated by reflection, for example, is irradiated onto the information card 35B carried by the passenger passing through the dedicated passage 12B of the adjacent reader 32B, thereby detecting the information card 3.
Even if the identification code signal W2B is generated from 5B and sent back to the reader 32B, the information card identification device 31 as a whole will be confused because the reader 32B is not in the operating state. It is possible to effectively avoid the risk of performing unnecessary identification operations.

(G2) Other Embodiments (11) In the above-mentioned embodiments, an embodiment in which the present invention was applied to the ticket gate identification system 15 as shown in FIG. 4 was described, but the present invention is not limited to this. As discussed above with respect to FIG. 5, it is widely applicable to identification systems in which multiple readers operate within a common identification space, such as the cargo sorting identification system 24.

(2) In the embodiments shown in FIGS. 1 and 2, the polling control unit 34 repeatedly sends out the drive signals 5IA-5ID in a time-division manner, but the drive signal 5I
The way A-3ID is generated is not limited to this. For example, the drive signal 5IA may be generated as necessary based on the results of identifying identification code signals W2A-W2D sent back from the information cards 35A-35D with the readers 32A-32D. -5 ID 1
The polling control unit 34
Even if it is controlled, the same effect as in the above case can be obtained.

(3) In the above embodiment, a plurality of readers 32
The drive was controlled so that A to 32D were sequentially switched one by one in adjacent order in a time-sharing manner, but the switching order could be changed as necessary, or multiple readers could be driven simultaneously to avoid confusion. The same effect as the above case can be obtained even if the structure is modified such as by

Effects of the Invention As described above, according to the present invention, by controlling the plurality of readers to be in the operating state in a time-wise manner, there is no possibility that the identification operation of the information card identification device as a whole may be confused. can be effectively avoided.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the information card identification device according to the present invention, FIG. 2 is a signal waveform diagram for explaining its operation, and FIG. 3 is a block diagram for explaining the basic configuration of the identification system. FIGS. 4 and 5 are perspective views showing an example of its application. l, 32A to 32D...Reader, 2...
・Identification signal generation circuit, 3...Transmission antenna, 4
．． 35A to 35D...Information card, 5...
...Receiving antenna, 6...Identification processing circuit, 31
. . . Information card identification device, 34 . . . Polling control unit.

Claims (1)

[Scope of Claims] A plurality of readers, each of which generates an identification confirmation signal to be emitted to an information card by an identification signal generating circuit, and a drive signal is sequentially and time-divisionally supplied to the plurality of readers. An information card identification device comprising: a polling control section for obtaining identification result information of the information card from the plurality of readers.