JP3528497B2 - Non-contact identification system and Mahjong tile identification system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contactless identification system composed of a data carrier and a reader, and more particularly to a contactless identification system and a mahjong tile which can identify the data carrier when there are a plurality of data carriers in a communication area. Identification system.

[0002]

2. Description of the Related Art Conventionally, in order to mechanize parts and products on an assembly and transfer line, identification of mahjong tiles, ski gates, automatic ticket gates, etc. A system for identifying Therefore, as shown in Japanese Patent Application Laid-Open No. 1-151831, a memory unit (data carrier) having a memory is provided as an identification object, and necessary information is written in such a memory by data transmission from the outside. A contactless identification system has been proposed in which the information is read out as needed.

Now, in the contactless identification system, FIG.
As shown in (a), a plurality of data carriers (DC) 10
1-1 to 101-4 are read / write heads (RWH) 1
There is a case where it enters the communication area of 02. Even in such a case, it is necessary to identify each data carrier in order to perform data communication normally. In the conventional identification system, in order to identify the data carrier, each data carrier is given a unique identification number in advance, a command for knowing the identification number is transmitted from the read / write head, and the identification number from the data carrier is transmitted. I am trying to receive data. At this time, if there are a plurality of data carriers in the communication area and there are responses from the data carriers at the same time, interference occurs and normal transmission to the read / write head side becomes impossible. For this reason, there is known an identification system in which each data carrier responds after a time determined by a random number after receiving this command, as shown in FIG. 8B, so that the responses of the respective data carriers do not overlap.

Further, as disclosed in Japanese Patent Laid-Open No. 8-16739, verification data unique to each data carrier is set, and verification is performed bit by bit when a plurality of data carriers are in the communication area. Data is sent back from each data carrier, and if there is interference, one of the logical levels is set from the read / write head side, and only the data carrier that matches this is set as the communication enabled state and the specific data carrier is identified. The proposed method is proposed.

[0005]

However, in such a method of identifying a plurality of data carriers, if the response from each data carrier is waited after a predetermined time determined by a random number, the maximum response time is always reached. I need to wait. Therefore, there is a drawback that it takes a long time to complete the communication with all the data carriers. In addition, even when controlling the response time with a random number, there is a drawback in that communications may overlap with a plurality of data carriers.

Further, even in the method of checking the collation data bit by bit, it is necessary to identify whether or not there is an interference state for each bit transmission, which requires communication between the data carrier and the read / write head. However, there is a drawback that it takes a long time to identify a plurality of data carriers.

The invention of claim 1 has been made in view of such a conventional problem, and it is a technical subject to make it possible to simultaneously identify the data carriers in the communication area. A second object of the present invention is to apply this non-contact identification system to a fully-automatic mah-jong tile reading device so that a mah-jong tile can be identified in a short time.

[0008]

According to a first aspect of the present invention, in a contactless identification system having a data carrier and a reader for reading data from the data carrier, the data carrier is an identification data area. With a memory and an intermittent carrier from the reader
The identification data area of the memory in response to the response command.
Read out at the timing of stopping the carrier.
Controls the generation and stop of reverberation according to different data areas
Data communication means for performing data communication by
In the identification data area of the memory, only one unique bit logical level in the data carrier group to be identified is different from other data carriers, and the other bit logical levels are set for all data carriers. It is obtained by setting such that the common, the reader is in a fixed cycle
The carrier is interrupted at a specified duty ratio and the data key
When the carrier is identified, it remains at the timing of stopping the carrier.
It is characterized in that the identification data area of the data carrier is read out according to the presence or absence of a resonance, and the data carrier in the communication area is identified by the identification data.

The invention of claim 2 of the present application is a mahjong tile identification system composed of a mahjong tile and a mahjong tile reading device, wherein each mahjong tile is attached with a data carrier, and the data carrier is Memory with identification data area and receiving intermittent carrier from the reader
The identification data area of the memory in response to the response command.
Read out at the timing of stopping the carrier.
Controls the generation and stop of reverberation according to different data areas
Data communication means for performing data communication by
In the identification data area of the memory, only one unique bit logical level in the data carrier group to be identified is different from other data carriers, and the other bit logical levels are set for all data carriers. It is set so that it is common, and the mahjong tile reading device has a fixed
The carrier is interrupted at a predetermined duty ratio in the cycle of
Suspension of Mahjong tile data carrier upon identification
According to the presence / absence of reverberation, the identification data area of the data carrier is read out and the mahjong tile in the communication area is identified by the identification data.

According to the invention of claim 1 of the present application having such a feature, all the data carriers have a common logical level in the identification data area of the memory except the logical level of the position unique to each data carrier. To set. Therefore, when this data area is read when identifying the data carrier from the reader, the responses from all the data carriers in the communication area can be obtained. At this time, the identification data area is read at the same time, but if the output from the data carrier is changed at a specific logic level, the response from the data carrier actually in the communication area is the response from the other data carrier. It can be read without interference. Therefore, the data carrier can be identified based on the position of the logical level of the data carrier that has made a response. According to the invention of claim 2, by applying this identification system to a mahjong tile identification system, and embedding a data carrier in the mahjong tiles, the tiles collected by the player are automatically read at the time of reading, and their roles etc. It can be displayed.

[0011]

1 is a block diagram showing the configuration of a contactless identification system according to an embodiment of the present invention. In the figure, a data carrier 1 has a resonance circuit 2 composed of a coil L1 and a capacitor C, and a rectification circuit 3 and a shunt circuit 4 are connected to the resonance circuit 2. The rectifier circuit 3 supplies power to each part in the data carrier 1 by rectifying and smoothing the signal obtained by the resonance circuit 2. The data communication means 5 demodulates the signal transmitted from the reader / writer from the signal obtained in the resonance circuit 2 when the power is supplied from the rectifier circuit 3. Then, based on the received command and data, the data is written in the memory 6 and the data is read from the memory 6. The data read from the memory 6 is converted into a serial signal and given to the shunt circuit 4. The shunt circuit 4 controls the reverberation by controlling the short-circuited state at both ends of the resonance circuit 2 when the carrier is stopped at the timing of receiving the data carrier, and transmits the signal to the reader / writer side by the reverberation. Is.

On the other hand, the reader / writer 11 is a controller 12
And a transmission circuit 13 and a reception circuit 14. The transmission circuit 13 has a transmission coil L2, which changes the duty ratio based on the transmission data at the time of data transmission, and interrupts the carrier at a constant duty ratio at the time of reception. The receiving circuit 14 has a receiving coil L3 and receives a signal from a data carrier by determining the presence or absence of reverberation during the period in which the carrier is stopped when the signal is received.

Now, in this embodiment, the memory 6 of the data carrier 1 has an identification data area. The identification data area is used for identifying each data carrier when a plurality of data carriers enter the communication area of the reader / writer, and is set in a specific area of the memory as shown in FIG. There is. Then, it is assumed that a plurality of data carriers that may enter the communication area of the reader / writer at the same time are set such that at least one unique bit has a constant logical level, for example 1. Other bits are common to all data carriers.
For example, when it is necessary to identify eight types of data carriers 1-1 to 1-8, the identification data area is 8 bits,
That is, 1 byte. In the identification data area of each data carrier, "1" is set in each unique bit as shown in FIGS. 3 (a) to 3 (h). All bits at other positions are set to "0". When identifying a larger number of data carriers, a required area of several bytes is set as the identification data area, and the bit in which each "1" is set is different.

Next, the operation for identifying the data carrier will be described. FIG. 4A is a flowchart showing the operation of the reader / writer 11, and FIG. 4B is the data carrier 1.
3 is a flowchart showing the operation of FIG. Reader / writer 11
When identifying a data carrier, first, in step 21, a read command of the identification data area is sent for identifying the data carrier. When the data carrier 1 receives this command, it returns the data in the identification data area of the memory 6. FIG. 5A shows a signal transmitted from the transmission circuit 13 of the reader / writer 11 to the data carrier at the time of this reply. When the reader / writer 11 receives data, the carrier is interrupted at a constant cycle, for example, at a duty ratio of 50% as shown in the figure.

The data carriers 1-1, 1-5, 1-
Assuming that 6 are simultaneously in the communication area, "00000001" and "000" are added to the above-mentioned identification data area, respectively.
The data of "10000" and "00100000" are held. When each data carrier receives the read command, it proceeds from step 31 to step 32 to read this data at the same time. Therefore, when the identification data area is read, the shunt circuit 4 of the data carriers 1-1, 1-5, and 1-6 controls the reverberation of the respective resonance circuits, so that the data carriers shown in FIGS. , (D), a signal is output. Since this signal is simultaneously received by the receiving circuit 14 of the reader / writer 11, the signal shown in FIG. 5 (e) is obtained.

Therefore, when the reader / writer receives the response, the pointer N is temporarily set to 0 in step 23, and it is determined whether the bit is 1 or not depending on the presence or absence of reverberation (step 24). Then, the presence or absence of a data carrier is determined by whether 1 is set (steps 25 and 2).
6) Check if the pointer N has reached 7. If the pointer 7 is N or less, the routine proceeds to step 28, N is incremented, the routine returns to step 24, and the same processing is repeated. By demodulating the signal in the identification data area in this way, the response of FIG. 5 (f) is obtained, and three data carriers 1-1, 1 are provided in the data communication area.
It can be recognized that -5 and 1-6 exist.

After identifying the data carrier in this way, the reader / writer attaches identification data to each data carrier and sends a command. In this way, data communication can be performed with a specific data carrier. Here, the logical level set in the identification data area of the memory is the logical level of the unique bit that identifies each data carrier as the level to which modulation is applied when the signal is transmitted from the data carrier, excluding the unique bit. Is set to a logic level that is not modulated when a signal is read from the data carrier. When the data carrier is used only for identification, the reader / writer may always operate only for reception.

FIG. 6 is a diagram showing a second embodiment of the present invention, which is used in a fully automatic mahjong table for automatically discriminating a winning combination and calculating points according to the identification system according to the first embodiment. It was what I had. Figure 6 (a) is a top view of the Mahjong table,
Mahjong tile reading devices 21 to 24 are provided at the positions of the respective players. The mahjong tile reading devices 21 to 24 are the same as the above-mentioned reader / writer, but are assumed to have a read-only function. Each of the mahjong tile reading devices 21 to 24 needs to recognize all the tile hands acquired by the player. Since Mahjong uses 144 tiles, a data carrier is embedded in each tile. Then, an identification data area having a data amount of 144 bits is used to determine all the tiles.
Since only the identification data area is sufficient for the memory 6 in the above-mentioned data carrier, the identification data area is set to 14
4 bits. The mahjong tile reading devices 21 to 24 are arranged on four sides of the mahjong table where the player is located, and the judgment device 25 is provided with the result read by each mahjong tile reading device. The judgment device 25 displays and judges the score of each person based on the read mahjong tile data, and the judgment result is displayed by the ascending hand / score display device 26.

FIG. 7A shows an example of four pieces of mahjong tiles and the identification data in the identification data area. In this data string, hexadecimal numbers are used to simplify the display. When these four mahjong tiles are read at the same time by the mahjong tile reading device, the read data becomes as shown in FIG. 7B, and it can be identified that there are the above four tiles. In this way, each player merely arranges a predetermined number of acquired mahjong tiles at a predetermined position, and the reading devices 21 to 24 identify them and the judging device 25 judges the rising hand and the score,
It can be displayed on the ascending hand / score display device 26.

In the first embodiment described above, the reader / writer 11 is used. However, if the data carrier is simply identified, it is necessary to have a writing function for writing data in the memory of the data carrier. There is no.

[0021]

As described in detail above, according to the present invention, even when a plurality of data carriers are simultaneously in the communication area, the identification data area of each data carrier can be read in a short time. The effect that the data carrier in the communication area can be identified based on the data in the identification data area is obtained. Further, in the invention of claim 2, by using the invention of claim 1 in the system for identifying mah-jong tiles, it is possible to easily identify the mah-jong tiles acquired by the player and display the climb and the score.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of a contactless identification system according to an embodiment of the present invention.

FIG. 2 is a diagram showing a memory area of a data carrier according to this embodiment.

FIG. 3 is a diagram showing data in identification data areas of eight data carriers according to this embodiment.

FIG. 4A is a flowchart showing the operation of the reader / writer according to this embodiment when identifying a data carrier;
(B) is a flowchart showing the operation of the data carrier.

FIG. 5 is a waveform diagram showing the output of the reader / writer and the output from each data carrier and the received data when identifying the data carrier.

FIG. 6A is a diagram showing an arrangement state of a mahjong tile reading device according to the second embodiment, and FIG. 6B is a block diagram showing the overall configuration thereof.

FIG. 7 is a diagram showing an example of mahjong tiles and identification data set in the tiles.

FIG. 8 is an explanatory diagram for identifying a plurality of data carriers in the conventional contactless identification system.

[Explanation of symbols]

1,1-1 to 1-8 data carrier 2 resonance circuit 3 rectifier circuit 4 shunt circuit 5 Data communication means 6 memory 11 Reader / Writer 12 Controller 13 Transmitter circuit 14 Receiver circuit 21-24 Mahjong tile reader 25 Judgment device 26 Upward winning / score display

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-7-8629 (JP, A) JP-A-8-36623 (JP, A) JP-A-8-16739 (JP, A) JP-A-1- 151831 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G06K 17/00 G06K 19/00-19/18 B42D 15/02 B42D 15/10 H04B 5/00-5/06 A63F 9/20 514

Claims (2)

(57) [Claims] 1. A contactless identification system having a data carrier and a reader for reading data from the data carrier, wherein the data carrier receives a memory having an identification data area and an intermittent carrier from the reader. And then the response command
Read the identification data area of the memory according to the
Identification data area read at the timing of carrier stop
By controlling the occurrence and stop of that reverberation according to
And a data communication means for performing data communication, wherein the identification data area of the memory is different from other data carriers only in the logical level of one unique bit in the data carrier group to be identified. The logical level of the bit is set to be common to all data carriers, and the reader interrupts the carrier at a predetermined duty ratio at a constant cycle,
When identifying the data carrier, the
A contactless identification system, characterized in that the identification data area of the data carrier is read according to the presence or absence of reverberation by imming, and the data carrier in the communication area is identified by the identification data. 2. A Mahjong tile identifying system configured by a Mahjong tile and a Mahjong tile reading device, wherein each Mahjong tile has a data carrier attached thereto, and the data carrier includes a memory having an identification data area. , Receive intermittent carrier from the reader, and respond
Read the identification data area of the memory according to the
Identification data area read at the timing of carrier stop
By controlling the occurrence and stop of that reverberation according to
And a data communication means for performing data communication, wherein the identification data area of the memory is different from other data carriers only in the logical level of one unique bit in the data carrier group to be identified. The bit logical level is set to be common to all data carriers, and the mahjong tile reading device intermittently interrupts the carrier at a predetermined duty ratio at a constant cycle,
When identifying the Mahjong tile data carrier,
A mahjong tile identification system characterized by reading the identification data area of the data carrier according to the presence or absence of reverberation at the timing of stop and identifying the mahjong tiles in the communication area by the identification data.