JPH08307327A - Identification system - Google Patents

Abstract

PURPOSE: To make it possible to detect written error data without adding a specific function to an ID unit by providing a memory in the ID unit with an updating control area and 1st and 2nd updating data areas. CONSTITUTION: The ID unit 3 includes the memory 1 provided with the updating control area and the 1st and 2nd updating data areas so as to continue the control area between the data areas. The control area has an updating area indicating the lately updated data area out of the 1st and 2nd updating data areas. In a write/read control unit 5, an updating data generating means 8 generates new updating data, generates a read inherent number in an inherent number area of the updating control area and generates updating data including data indicating the other updating data area in the updating area of the updating control area. A data writing means 9 simultaneously writes the generated updating data in the other updating data area and the updating control area of the memory 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an identification system used in a physical distribution system, an electronic coupon system, etc.

[0002]

2. Description of the Related Art A parts identification system, an electronic coupon system, and the like used in a conventional assembly and transportation line require a system for identifying and managing articles. Therefore, as in Japanese Patent Laid-Open No. 1-163991, an ID having a memory as an object to be identified
An identification system has been proposed in which a card is provided, necessary information is externally written to an ID card by data transmission, and the information is read out as necessary. Such an ID card is attached to a pallet or the like, or is owned by the user, and the data necessary for the ID card is read from the writing / reading control unit arranged on the side of the pallet transport path or the entrance / exit gate. It is configured to write or read.

[0003]

In the ID card of such a conventional identification system, as shown in FIG.
The memory of the D card has a read-only data area A such as the period of use, the number of times of use, the type of card, and an area B of update data for reading and writing the number of times of boarding. And ID
When the card is used as a coupon card, the update data is updated and rewritten for each use. Therefore, as shown in FIGS. 9A and 10, after the first ID card 102 arrives at the communicable area of the read / write antenna (RWA) 101 and the areas A and B are read, the ID controller 103 side Check the contents. At the time of confirming the contents, not only the ID controller 103, but also a host computer (not shown) connected to the host controller determines the opening / closing of the gate by checking the period of use, the number of times of use, the type of card, and the like. And when opening the gate,
Update data for decrementing the number of boardings is created, and this update data is written in the update data area B. Therefore, as shown in FIG. 10, there is a certain time lag between the reading of data areas A and B and the writing of data into area B. Therefore, when the data of the ID card 102A is read out as shown in FIG. 9A and then comes out of the communication area indicated by the broken line, and the other ID card 102B enters the communicable area, the other ID card 102B is written. The update data will be written by mistake. In this case, there is a drawback in that erroneous data is not written in the ID card 102B and the data before rewriting cannot be restored.

The present invention has been made in view of the above problems of the conventional identification system. In the invention of claim 1, erroneous data is written without adding a function to the ID card. The purpose is to be able to detect this sometimes. In addition to this problem, the invention of claim 2 has as a technical problem to be able to restore the original data even if the data is written by mistake.

[0005]

According to a first aspect of the present invention, as shown in FIG. 1, a memory 1 for holding data, a command and data given from the outside are demodulated, and data read from the memory is read. A write / read control unit 5 having an ID unit 3 having a data transmitting means 2 for transmitting and a data transmitting means 4 for transmitting data with the ID unit.
And an ID unit, in addition to the unique number area holding the unique number, the update control area and the first and second update data areas sandwiched between the update control area and the unique number area. The update control area has a memory arranged therein, and the update control area has a unique number area of the ID unit for which the data is updated and an update area indicating either the first or the second update data area that has been updated most recently. The writing / reading control unit includes a data reading means 6 for reading the data of the ID unit and an I read by the data reading means.
The unique number comparing means 7 for comparing the unique numbers of the unique number area of the D unit and the unique number area in the update control area and new update data when the unique number is matched by the unique number comparing means, and the update control area is generated. Update data generation means 8 for generating update data including the unique number read in the unique number area and the update data of the other update data area in the update area of the update control area, and the update data generation means 8 generated this time. Data writing means 9 for simultaneously writing the update data in the other update data area and the update control area of the memory of the ID unit.

According to a second aspect of the present invention, as shown in FIG. 1, a memory 1 for holding data, a data transmission means 2 for demodulating an externally applied command and data, and transmitting the data read from the memory. ID unit 3 with
And a write / read control unit 5 having a data transmission means 4 for transmitting data to and from the ID unit, wherein the ID unit has update control in addition to a region for identifying its unique number. The update control area has a memory in which the area and the first and second update data areas sandwiched between them are arranged so as to be continuous, and the update control area is an ID for updating the data.
The write / read control unit has a unique number area of the unit and an update area indicating the first or second update data area that has been updated most recently. When the reading means 6, the unique number comparing means 7 for comparing the unique numbers of the unique number areas of the ID unit and the update control area read by the data reading means, and the unique numbers by the unique number comparing means, Update data generation means for generating new update data and generating update data including the unique number read in the unique number area of the update control area and the data indicating the other update data area in the update area of the update control area 8
And a correction for writing the update data of the other update data area not shown in the update area of the update control data when the unique numbers do not match by the unique number comparison means to the update data area indicated by the update area of the update control data. A correction data generation means 10 for generating data, and a data writing means 9 for simultaneously writing the update data generated by the update data generation means this time or the update data generated by the correction data generation means in the memory of the ID unit. It is characterized by having.

[0007]

According to the invention of claim 1 of the present application having such a feature, the memory of the ID unit is arranged so that the first and second update data areas are continuous with the update control area interposed therebetween. When updating the data, all the data in the ID unit is read out, and the unique number area and the unique number area in the update control area are compared. If they match, it is considered that the ID units are not exchanged, so new data is generated in the update data area that has not been updated most recently, and that area is used as the update area of the update control data area. The update data is generated and simultaneously written in the memory of the ID unit. According to the invention of claim 2, in addition to such a configuration, when the unique number area and the unique number area in the update control area do not match, the incorrect data is updated and written in the ID unit due to the replacement of the ID unit. It is determined that it is embedded. Then, in order to correct the data due to the replacement of the ID unit, the data of the area which is not the latest update data area is written to the latest update data area side. The data can then be modified.

[0008]

2 is a block diagram showing the construction of an identification system according to an embodiment of the present invention. The identification system according to the present embodiment is an ID that holds data such as commuter passes and coupon tickets.
As the unit 3, for example, a card-shaped ID card 11 is used. A read / write head 12 for writing and reading data to and from the ID card 11, and an ID controller 13 connected to the read / write head 12 and controlling the operation thereof are provided. The read / write head 12 and the ID controller 13 form a write / read control unit 5. Further, the ID controller 13 is the high-order computer 1
4 is connected.

Now, as shown in the block diagram of FIG. 3, the ID controller 13 is a microprocessor (CPU) 2 which controls writing and reading of data to and from the ID card 11.
1 and a memory 22 that holds the system program and data thereof, and an input / output interface 23 that performs input / output with the host computer 14. The read / write head 12 has a modulation circuit 24 which receives an output from the CPU 21 and modulates data to be transmitted to the ID card 11, and a transmission unit 25 which is driven by the output. The transmitter 25 transmits data to the ID card 11 by outputting an FSK-modulated signal from a coil, for example. Further, the received signal obtained from the ID card 11 is given to the demodulation circuit 27 via the receiving unit 26. The demodulation circuit 27 demodulates this signal and gives it to the CPU 21. Here, the modulation circuit 24, the transmission unit 25, the reception unit 26 and the demodulation circuit 27 of the read / write head 12 perform data transmission with the ID card.
Is composed.

Next, the structure of the ID card 11 will be described with reference to FIG. In FIG. 4, a transmission / reception unit 31 receives and transmits a signal having a frequency emitted from the read / write head 12, and its reception output is the demodulation circuit 3.
Given to 2. The demodulation circuit 32 demodulates this signal, converts the data into the original signal, and gives it to the control unit 33.
A memory 34 is connected to the control unit 33 via a bus.
The control unit 33 writes or reads data in the memory according to the command and data given from the ID controller 13. Then, the data read from the memory 34 is converted into a serial signal and given to the transmission / reception unit 31 via the modulation circuit 35. The transmission / reception unit 31 gives a signal to the read / write head 12 side by changing the resonance frequency of the resonance circuit as in the conventional example. Here, the transmission / reception unit 31, the demodulation circuit 32, and the modulation circuit 3
Reference numeral 5 constitutes data transmission means 2 for demodulating the data of the command given from the ID controller 13 and transmitting the read data.

FIG. 5 is a diagram showing a memory map of the memory 34 of the ID card 11. As shown in the figure, the memory 34 includes an area A for read-only data, an area B for holding the first update data, an area C for holding the update control data, an area D for holding the second update data, and a card-specific area. It has an area E for holding numbers. The read-only data area A is a data area that is first written when the ID card is issued and is not written thereafter. For example, when the ID card is used as a coupon ticket, necessary data such as usable range and time limit. Is written. In the area E as well, data unique to the card is written only when the card is issued, and thereafter, the area is read-only. Areas B and D of the first and second update data are areas that are rewritten for each update, and the number of times of use is written, for example. The update control data C is composed of an area C1 in which a card unique number is written for each update, and an update area C2 in which information indicating in which update data area B or D the update data is written. .

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. In this flowchart, () indicates data in the area. When the ID card 11 arrives in the communication area, first, in step 51, the areas A to E of the ID card 11 are read. Then, in step 52, it is checked whether the card unique numbers of the area C1 and the area E match. If this does not match, the data is invalid and error processing is performed.
If it is correct, the routine proceeds to step 53, where the previously updated area is discriminated from the data of the area C2. And step 5
In step 4, update data is created from the data in the update data area B or D that was updated last time. For example, ID of coupon ticket
For cards, decrement the remaining usage count. For example, an ID having data as shown in FIG.
When the card arrives, the contents of the areas C1 and E match, and the area D is shown in C2.
In step 5, the area updated last time, in this case, the area B different from the area D is set as the update data area. And step 5
In step 6, the data indicating the current update data area, that is, the data indicating the area B is set as the write data to the update control area C2. The contents of the card unique number area E, in this case "1234", is used as the write data to the update control area C1. Then, the process proceeds to step 58 to simultaneously write the update data to the area B1 and the update control areas C1 and C2 at the same time, as shown in FIG. 7B. Here, the areas to be written at the same time are shown in shades. In this way, the data immediately before the updated data remains in the update area D as it is, and the data updated before that is rewritten.

When another ID card having the data shown in FIG. 7 (c) enters the writing area at the rewriting timing of this ID card, the data of the ID card is as shown in FIG. 7 (d). Will be rewritten to. However, when the data of this ID card is read next time, erroneous writing is found because the card unique number in the update control area does not match. At this time, since it can be recognized that the data in the area B has been rewritten, the data can be restored based on the data in the area D. FIG. 8 is a flow chart showing the correction processing of this data. As shown in the figure, at the time of data correction, the areas B to E are read in step 61, and the process proceeds to step 62 to determine whether the update area C2 indicates the update data area B or D. If it is the region B, the process proceeds to steps 63 and 64 to set the region D to the update control region C2.
Write data to be written to. Then, the contents of the area D are used as write data for the area B. When the content of the update control area C2 is the area D in step 62, the area B is used as the write data to the update control area C2, and the content of the area B is used as the write data to the area D (step 65). , 66).
Then, the process proceeds to step 67, where the card unique number is used as the write data to the update control area C1. In this way, the areas B and C or C and D are simultaneously written and the processing is completed. This way 1
The previous data can be automatically restored.

In this embodiment, the ID card is used as the ID unit, but not only the card type but also various types of I
It goes without saying that the D unit can be used.

[0015]

As described above in detail, in the inventions of claims 1 and 2 of the present application, the areas of the first and second update data are written alternately, and the previous data always remains. Therefore, it is possible to detect a data error due to replacement of the ID card. In addition to this effect, the invention according to claim 2 has an effect of being able to restore the data at least once before when the unique numbers are different.

[Brief description of drawings]

FIG. 1 is a block diagram showing a functional configuration of the present invention.

FIG. 2 is a block diagram showing an overall configuration of an identification system used in the present invention.

FIG. 3 is a block diagram showing configurations of an ID controller and a read / write head.

FIG. 4 is a block diagram showing a configuration of an ID card.

FIG. 5 is a memory map of a memory 34.

FIG. 6 is a flowchart (part 1) showing the operation of the write / read control unit according to the present embodiment.

FIG. 7 is a schematic diagram showing data written in an ID card.

FIG. 8 is a flowchart (No. 2) showing the operation of the write / read control unit according to the present embodiment.

FIG. 9 is a schematic diagram showing a usage state and data writing of a conventional identification system.

FIG. 10 is a time chart showing data transmission between a conventional read / write antenna and an ID card.

[Explanation of symbols]

 1, 34 Memory 2, 4 Data Transmission Means 3 ID Unit 5 Writing / Reading Control Unit 6 Data Reading Means 7 Unique Number Comparison Means 8 Update Data Generating Means 9 Data Writing Means 10 Correction Data Generating Means 11 ID Cards 12 Read Write Head 13 ID controller 14 Host computer 21 CPU 33 Control unit

Claims (2)

[Claims] 1. A memory for holding data, an ID unit having a data transmission means for demodulating an externally applied command and data, and transmitting the data read from the memory, and data transmission between the ID unit. A write / read control unit having a data transmission means, wherein the ID unit has an update control area and a first sandwiched between the update control area and a unique number area for holding the unique number. , A memory in which the second update data area is arranged so as to be continuous, and the update control area is one of the unique number area of the ID unit that has updated the data and the most recently updated first or second area. An update area indicating an update data area, wherein the writing / reading control unit includes a data reading means for reading the data of the ID unit, Unique number comparing means for comparing the unique numbers of the unique number area of the ID unit and the unique number area in the update control area read by the data reading means, and new update data when the unique numbers are matched by the unique number comparing means. And update data generating means for generating update data including a unique number read in the unique number area of the update control area and data indicating the other update data area in the update area of the update control area; And a data writing unit that simultaneously writes the update data generated by the data generating unit to the other update data area and the update control area of the memory of the ID unit. 2. A data holding memory, an ID unit having a data transmission means for demodulating an externally applied command and data, and transmitting the data read from the memory, and data transmission between the ID unit. A write / read control unit having a data transmission means, wherein the ID unit has an update control area and a first sandwiched between the update control area and a unique number area for holding the unique number. , A memory in which the second update data area is arranged so as to be continuous, and the update control area is one of the unique number area of the ID unit that has updated the data and the most recently updated first or second area. An update area indicating an update data area, wherein the writing / reading control unit includes a data reading means for reading the data of the ID unit, Unique number comparing means for comparing the unique numbers of the unique number area of the ID unit and the unique number area in the update control area read by the data reading means, and new update data when the unique numbers are matched by the unique number comparing means. And update data generating means for generating update data including a unique number read in the unique number area of the update control area and data indicating the other update data area in the update area of the update control area; Correction data for writing the update data of the other update data area not shown in the update area of the update control data to the update data area shown in the update area of the update control data when the unique numbers by the number comparing means do not match. Correction data generating means for generating the update data generated by the update data generating means or the correction data generating means The update data generated from the column is I
Data writing means for simultaneously writing to the memory of the D unit,
An identification system characterized by having.