JPH07234896A - Method and device for accumulation in cafeteria system - Google Patents

Abstract

PURPOSE:To enable optimum totalizing processing for an automatic payment with a data carrier and a reader/writer while using an ID card. CONSTITUTION:Tableware 10 is provided with data storage media 12a and 12b storing class codes showing the kinds of dishes and at an account counter 16, the ID code of a user is written in the data storage media 12a and 12b by a reader/writer 18. When the user finishes meals, the kind code of the data storage medium provided at the collected tableware 10 and the ID code are read by the reader/writer 18 and transferred to a host device, and kind data are totalized for each ID code.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a counting method and apparatus for a cafeteria system such as an employee cafeteria, which reads and writes data in a data storage unit provided on tableware with a reader / writer and counts the amount of usage.

[0002]

2. Description of the Related Art Generally, there are two methods of totaling at a cafeteria: a method of paying cash, a method of paying with a prepaid card, and a method of automatically deducting from a salary with an ID card. Of these, the automatic withdrawal method using an ID card is widely used because it can be efficiently processed by many users.

On the other hand, in recent years, a system in which a data storage body is provided in the object itself to store necessary data, and the data is read and processed by a reader / writer has become popular, and an automatic withdrawal by an ID card is performed. It is considered that the method is applied to a counting device that adopts the method. Conventionally, as an aggregation device using a reader / writer and a data storage body, for example, FIG.
There is something like. In FIG. 10, the reader / writer 100 is connected to a register device, for example, as a host device. The register device issues a read command to the reader / writer 100, collects the data read by the reader / writer 100 from the data storage unit 200, totalizes the total amount, and sends the total amount to a host computer that constructs a salary system to send a salary withdrawal list. To create.

The reader / writer 100 includes a control unit 110,
A reading unit 120, a transmission unit 130, and a correlation calculation unit 140 are provided. In addition, the data storage unit 200 includes a transmission unit 21.
0, a read unit 220, a memory 230, and a pseudo random signal generation unit 240 are provided. The reader / writer 100
A predetermined command sequence is issued to the data storage body 200. For example, a read command is followed by an address setting command, and then a pseudo random signal return command for the number of bits required to read the target data is sent, and the required number of bits of data is obtained bit by bit. .

On the other hand, in the data storage unit 200, the read unit 220 causes the memory 230 to read the read command from the reader / writer 100, the read start address of the memory 230 is set by the next address setting command, and then the pseudo read command is set. The random signal return command is used to read data from the memory 230 bit by bit and return a pseudo random signal corresponding to the read bit.

When the reader / writer 100 receives the pseudo random signal from the data storage body 200, the correlation calculator 140
Holds the same pseudo-random sequence as on the data storage body 200 side, calculates the autocorrelation value between the held sequence and the received signal, and restores the received data of bit 0 or 1 by comparing the two autocorrelation values. . However, in such a conventional aggregation device using a reader / writer and a data storage body, one data storage body to be read is placed in the access area and data is read out for each data storage body. , (1) manpower is required to perform accounting calculation, and (2) 1
There is a problem that it takes time and labor to replace the objects one by one, and (3) processing time is required.

As a totalizing device for solving such a problem, for example, the one shown in FIG. 11 has been proposed (Japanese Patent Laid-Open No. 4-350791). In the settlement apparatus of FIG. 11,
Each tableware 5 is provided with a tableware recognition data carrier 3a storing an identification code indicating a dish, and the tray 2 on which the tableware 5 is placed is provided with a personal recognition data carrier 3b for storing an ID code.

The user of the dining room takes the tableware 5 of a favorite dish from the arranged dishes, puts it on the tray 2, and carries it to the counting counter 1. The total counter 1 is provided with a reader / writer 4, and each data carrier 3 a, 3 b on the tray 2 is provided.
Send question data to. The ID code of the user read by the card reader 6 is written on the personal identification data carrier 3b provided on the tray 2.

In response to the inquiry data from the reader / writer 4, the tableware recognition data carrier 3a returns an identification code, and the individual recognition data carrier 3b returns an ID code.
The return from the data carriers 3a and 3b is performed at the same time, but an induction electromagnetic field having a specific frequency of each data carrier 3a and 3b is formed to communicate. When the data reading is completed, the reader / writer 4 instructs the data carrier not to send back the data carrier so as not to respond to the question data thereafter.

After reading the tableware recognition data carrier 3a, the reader / writer 4 reads the ID code from the individual recognition data carrier 3b. When there is no response to the question data, it is determined that all the data carriers 3a and 3b have been read out, the amount of money is obtained from the identification code by referring to the table, and the adjustment data for each ID code is created.

[0011]

However, in such a conventional settlement apparatus, in addition to the tableware recognition data carrier provided on the tableware, a personal recognition data carrier used for reading the ID code is required, The data carrier to be used must be prepared for both the tableware and the tray, and there is a problem that the number of data carriers increases.

Further, when the tray on which the dishes are placed is placed on the checkout counter, data reading is sequentially performed for all the data carriers, which causes a problem that the processing takes time.
Further, in the conventional settlement apparatus, since the identification codes returned by a plurality of data carriers at the same time are sequentially read in response to the inquiry data from the reader / writer, the identification codes are FSK-modulated at a specific frequency and transmitted. Since the data carrier is demodulated, it is necessary to assign different unique modulation frequencies to each of the multiple data carriers, so that each data carrier is of a different type.

As a result, the table data is always set as the correspondence relationship between the type of tableware recognition data carrier determined by the assigned frequency, the identification code stored in the tableware recognition data carrier, and the amount of the dish of the plate provided with the tableware recognition data carrier. Must be managed, and the table contents must be rewritten every time the menu changes, which makes management work extremely complicated.

When the tableware or tray is damaged and needs to be replaced, the assigned frequency of the mounted data carrier is checked,
Tableware fitted with data carriers of the same assigned frequency must be prepared, which requires extremely complicated equipment management. Furthermore, since there is a legal limit to the assigned frequency that can be used with this type of equipment, different frequencies are assigned to different types of dishes, assuming that the same dish will not be used more than once in order to reduce the assigned frequency. It is also possible. But,
Depending on the person, there are cases where two same dishes are prepared, and in this case, even if the identification code is returned from two data carriers, it cannot be essentially distinguished from the return from one data carrier, and the settlement cannot be performed correctly. Also, if such a thing becomes known to the user, it may lead to illegal use.

Further, in another settlement device disclosed in Japanese Patent Laid-Open No. 4-346193, different frequencies are assigned to data carriers, and at the same time, inquiry data from the reader / writer is scanned for assigned frequencies for predetermined data carriers. Then, the data carrier is sequentially transmitted with an identification code. However, also in this case, the data carrier has the same problem because the allocated frequencies are different.

As described above, the conventional totaling device takes time for processing because all the identification code and the ID code of the dish from the data carrier are read out at the settlement place, and it is of a type having a unique assigned frequency. Since different data carriers are required, the manufacturing cost of the data carriers becomes high, the management of the correspondence table for settlement processing is complicated, and the maintenance and management accompanying the exchange of tableware and trays also takes time and cost. There was a problem.

The present invention has been made by paying attention to such a conventional problem, and is a totaling method and apparatus of a cafeteria system which is most suitable for automatic withdrawal processing using an ID card using a data carrier and a reader / writer. The purpose is to provide.

[0018]

To achieve this object, the present invention is constructed as follows. First, the present invention is directed to a cafeteria system totaling method for totaling the amount of usage by reading and writing data in a data storage body provided on tableware with a reader / writer. As such a counting method, the present invention includes the following procedures.

ID code writing process The user's ID code is written by a reader / writer in a predetermined memory area of a data storage body in which a type code indicating the type of food is stored in advance. Read / Transfer Process After the ID code has been written, another type of reader / writer reads the type code and ID code of the data storage body provided in the collected tableware and transfers it to the host device.

The type data is totaled for each ID code obtained in the reading and transferring process. Further, in the present invention, the writing check is performed as follows in the ID code writing process. That is, in the ID code writing process, after the ID code is written in the data memory, reading is performed to return one of two kinds of predetermined pseudo random signals corresponding to 0 and 1 of the read bits of the ID code, The reader / writer performs parallel autocorrelation calculations of the same two types of pseudo random signals as the data storage body and the received signal.

At this time, if one of the autocorrelation values exceeds a predetermined threshold value, the received bit corresponding to the autocorrelation value exceeding the threshold value is restored. On the other hand, when both autocorrelation values exceed a predetermined threshold value, although the same ID code is written, different ID code write abnormalities are recognized, and the host device recognizes the ID code write error. Notify write error.

The present invention also provides a totaling device for totaling the amount of usage by reading and writing the data in the data storage unit provided on the tableware with a reader / writer. In such a totaling device of the present invention, the data storage body in which the type code indicating the type of dish is stored in the memory, and the ID code input means for inputting the ID code previously assigned to the user at the time of payment. When,
A first reader / writer for writing the ID code input by the ID code input means in a predetermined memory area of a data storage provided in one or a plurality of tableware placed at a settlement place;
A second reader / writer for reading the type code and the ID code of the data storage body provided on the tableware collected after the writing of the ID code and transferring them to the host device and summing the type data for each ID code Is characterized by.

Here, the data storage body is a memory having a type area in which a type code indicating the type of dish is written, and an ID area in which an ID code indicating the user is written,
When a predetermined command from the first or second reader / writer is received, control means for reading or writing data, and two kinds of pseudo random signals corresponding to read data bits 0, 1 of the memory are defined. And a pseudo random signal returning means for returning a pseudo random signal corresponding to a read bit of the memory when receiving a read command from the first or second reader / writer.

Further, the first reader / writer used at the settlement place is provided with at least data writing means for writing data in the data storage body in response to a predetermined command sent from the host device. Further, the second reader / writer receives the data reading means for reading data from the data storage body in response to a predetermined command sent from the host device, and the pseudo random signal from the data storage body, and holds them in advance. Correlation calculation means for calculating an autocorrelation between the same two types of pseudo random signals as the data storage body and a received bit corresponding to one of the autocorrelation outputs exceeding a predetermined threshold value. And

Further, the first reader / writer further receives the pseudo random signal from the data storage body, calculates the autocorrelation value with each of the two types of pseudo random signals held in advance, and exceeds the predetermined threshold value. If both autocorrelation values for recovering the received bit corresponding to one of the autocorrelation outputs and the autocorrelation values for both of them exceed a predetermined threshold value, the host device is notified of an ID code write error. And an error discriminating means for performing the same.

[0026]

According to such a counting method and apparatus of the present invention, since the settlement counter only has to write the user's ID code into the table data storage, the processing at the counting location is simplified and the processing is performed. Can be made more efficient. In particular, the writing of the ID code can be simultaneously performed on the data storage bodies of a plurality of tableware on the tray, so that the processing does not take time even if the number of data storage bodies increases.

Further, since only the ID code is actually written at the settlement place, the staff member can carry out light tasks such as ID card reading monitoring and system usage guidance. Further, the totalizing process by reading the ID code and the type code from the data storage unit can be performed at the time when the cafeteria work is completed after the dishes are returned and washed and dried, and the busyness at the time of a crowded meal is affected. Without having to worry, it is possible to carry out the aggregation work in a calm environment.

Further, when the ID card is written in the data storage of the tableware, it is read out and bits 0, 1 are added to the ID code.
One of two types of pseudo-random signals according to
By the autocorrelation calculation of each of the two types of pseudo-random signals held by the reader / writer side and the received signal, both of the autocorrelation values exceed the threshold value, and the abnormal writing of the ID code is recognized and notified to the host device. However, it is possible to properly take error countermeasures such as retries.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory diagram showing the processing procedure of a totaling method using a reader / writer and a data storage body of the present invention. First, in an employee cafeteria to which the present invention is applied, a data storage body is provided by embedding, adhering or the like in all the tableware used. In the data storage body of the container, a type code indicating the content of the dish is written in advance according to the menu of the day. The writing of the type code indicating the dish to the data storage body can be performed using a dedicated reader / writer.

The user of the cafeteria only has to take a favorite dish from the dishes lined up in the container on the tray, carry it to the settlement counter, and pass the ID card possessed by the user through the card reader. . The usage fee will eventually be automatically deducted from the salary of the user through the settlement process according to the present invention. With reference to FIG. 1, the settlement method of the present invention will be described in detail as follows. First, as shown in, the user selects a favorite dish from the arranged dishes and places it on the tray 14 as shown in FIG. 1 (A). A data storage body 12 is provided in each of the dishes 10 placed on the tray 14, and a type code indicating the type of dish is stored in advance.

As shown below, the tray is carried and placed on a checkout counter provided at a predetermined location. FIG. 1B shows a state in which the tray 14 is placed on the settlement counter 16. The transmitting / receiving coil 2 is provided in the settlement counter 16.
An ID writing reader / writer (first reader / writer) 18a having 0 is provided. This reader / writer 18a
Is connected to a register device 22 as a host device, and a card reader 24 is connected to the register device 22.

Subsequently, the user inserts his or her own ID card 25 into the card reader 24 of the register device 22 installed near the checkout counter 16 and causes the ID card to be read. . Register device 2
When 2 receives the ID code read by the card reader 24, it issues an ID code write command to the reader / writer 18.

In response to the write command from the register device 22, the reader / writer 18 uses the card reader 24 to read the data storage body 12 provided in each of the containers 10 by non-contact coupling by the transmission / reception coil 20. Write the ID code of the person. The writing of the ID card to the plurality of data storage bodies 12 by the reader / writer 18 can be performed collectively by one writing because the same ID code can be written to all the data storage bodies.

As shown below, after the payment is completed, the user eats a meal, and when the meal is completed, the container is returned to the designated place as shown in, and the returned container is washed by a staff member. After that, it is dried. When the returned containers have been washed and dried, the totaling process is performed as shown in. FIG. 1C shows the state of the totalization processing after the washing and drying.
The containers that have been washed and dried are arranged in order, and are conveyed by, for example, the conveyor 27. A reader / writer (second reader / writer) 18b for totalizing transmission / reception coils 20b is provided in the middle of the conveyor 27. Second reader / writer 18b
Is connected to a host computer 26 as a host device.

When the container 10 enters the communicable area determined by the conveyor 27 depending on the installation location of the transmission / reception coil 20b of the reader / writer 18b, the presence of the container 10 is detected by a sensor or the like, and the data is read from the data storage body 12a of the container 10, for example. The operation is performed to read the ID code and the type code stored in the data storage body 12a. Reader / writer 18
The ID code and the type code of the data storage body 12a read in b are transferred to the host computer 26.

The host computer 26 is provided with an aggregation processing function for automatic withdrawal using an ID card, and creates table data storing a type code for each ID number sent from the reader / writer 18b. . All containers 10 that have been washed and dried by the reader / writer 12b
When the host computer 26 receives the notification of the completion of reading the ID code and the type code from the data storage of the above, the host computer 26 converts the type code and the amount of money with respect to the type code table created for each ID code created from the transfer data up to that point. The usage fee for each ID code is totaled by referring to the table.

The totalized result is stored in another disk file or the like, which is stored in a management file for automatic withdrawal of salary using the ID code of the user as an index.
Then, when the salary is calculated, the calculation processing of the automatic withdrawal of the usage fee is performed. 2 is a settlement counter 1 of FIG.
An example of the reader / writer 18a for ID writing provided in FIG.

In FIG. 2, the reader / writer 18 for ID writing includes a control unit 28, a writing unit 30, and a transmission unit 32, and the transmission / reception coil 20 is externally connected to the transmission unit 32. The transmission / reception coil 20 is installed inside the settlement counter 16 having a size corresponding to the tray 14, and the data storage body 12 a provided on the tableware 10 placed on the tray 14.
Data transmission is performed between the terminal 12 and 12c by electromagnetic induction coupling.

A card reader 24 is connected to the register device 22 which is an upper device of the reader / writer 18, and a display 36 is provided. As shown in FIG. 1, when the user causes the card reader 24 to read his or her own ID card with the tray 14 on the checkout counter 16, a write command is sent from the register device 22 to the reader / writer 18. The read ID code is transferred. Based on this, the control unit 28 activates the writing unit 30 and sequentially issues the write command, the ID area address, and the ID code.

Each of the command, the address and the data from the writing section 30 is transmitted to the transmission section 32 at bit 0,
It is converted into FSK signals of different frequencies corresponding to 1, and is supplied to the transmission / reception coil 20 to form an induction electromagnetic field serving as a communicable area on the settlement counter 16. The data storage body 12 provided in the tableware 10 demodulates an induction signal due to the electromagnetic induction magnetic field of the transmission / reception coil 20 and
Acquires data and writes to the built-in memory.

FIG. 3 shows an embodiment of a data storage body provided in tableware according to the present invention. In FIG. 3, the data storage 12
A transmission unit 38, a control unit 40, a memory 42, and a pseudo random signal generation unit 48 are provided in the. The transmission unit 38 is also provided with a transmission / reception coil for electromagnetic induction coupling with the transmission / reception coil on the reader / writer side. Further, since the FSK modulated signal is sent from the reader / writer, a demodulation circuit for the FSK modulated signal is provided.

The control unit 40 analyzes the command from the reader / writer and performs the writing operation or the reading operation with respect to the memory 42 according to the command. A non-volatile E ² PROM, for example, is used as the memory 42. A type area for storing the type code 44 is predetermined in the memory 42,
Further, an ID area 46 for writing the ID code is predetermined. When an E ² PROM is used as the memory 42, writing and reading to and from the memory 42 is 1
It is done bit by bit. The write operation is performed in synchronization with the bit transfer of write data from the data carrier side. On the other hand, in the read operation, data is read bit by bit each time a data return command is received from the reader / writer.

In the present invention, since a pseudo random signal corresponding to bit 0 or 1 is returned every time one bit of data is read, the data return command is called a pseudo random signal return command. The pseudo random signal generator 48 stores different pseudo random signals corresponding to the read bits 0 and 1 from the memory 42,
One pseudo random signal corresponding to the read bits 0 and 1 is returned via the transmission unit 38. As the pseudo random signal, an appropriate signal such as an M series signal, a Gold series signal, or a Barker code signal can be used. Also, the number of bits (number of elements) of the pseudo random signal can be appropriately determined as necessary.

FIG. 4 shows the processing operation of the reader / writer 18 for ID writing shown in FIG. In FIG. 4, first, in step S1, it is checked whether or not the tray 14 is on the settlement counter 16. The tray 14 may be detected by providing the settlement counter 16 with an appropriate sensor. Further, in the reader / writer 18b having a reading function which will be clarified later, the presence or absence of the tray 14, that is, the data storage body can be checked by performing the reading by the pseudo random signal return command. Further, it may be started using the settlement start button of the operator.

When the presence of the tray is detected in step S1, the process proceeds to step S2 and waits for the reading of the ID card by the card reader 24 connected to the register device 22. In step S3, when the ID code write command and the read ID code are supplied from the register device 22, the ID code write process is executed on the data storage body. That is, a write command is issued, an ID area address set command is issued subsequently, and an ID code is issued in bit units.

Two containers 10 are placed on the tray 14 of the settlement counter 16 shown in FIG. 2, and each has a data storage body 12. When the ID code is written from the reader / writer 18a, all the data storage bodies are in the communicable area of the transmission / reception coil 20, so the ID code is written at the same time. FIG. 5 is an explanatory diagram showing an embodiment of the reader / writer 18b that performs the settlement process on the tableware that has been washed and dried shown in FIG. 1C.

In FIG. 5, the reader / writer 18b includes a controller 28, a reader 50, a transmitter 32, and a D0 correlation calculator 5.
2, D1 correlation calculator 54. Reader / writer 1
The transmission / reception coil 20b is connected to the transmission unit 32 of 8b. The transmitting / receiving coil 20b is the tableware 10 by the conveyor 27.
Are arranged so that the transporting area of is the communication area.

When the reader / writer 18b detects the presence of the tableware 10 in the communicable area of the transmission / reception coil 20b by a sensor or the like, the reading unit 50 causes the data storage body 12 to read. In this read operation, first, a read command is issued, then an ID area address setting command is issued, and then a pseudo random signal return command for the number of bits of the ID code is issued.

In response to the read sequence for reading the ID code, the data storage body 12 provided in the tableware 10
Then, the ID code is read, and the pseudo random signal D0 is returned at bit 0 and the pseudo random signal D1 is returned at bit 1 in correspondence with the read bits 0 and 1, for example.
The same signal as the pseudo random signal D0 on the data storage body 12 side is held as a reference signal in the D0 correlation calculation unit 52 of the reader / writer 18b, and similarly, the D1 correlation calculation unit 54 also stores the pseudo random signal D1 on the data storage body 12 side. The same signal as is held as the reference signal.

The D0 correlation calculation unit 52 and the D1 correlation calculation unit 54 calculate the autocorrelation value between the received signal from the transmission unit 32 by the transmission / reception coil 20b and the reference signal held in advance, and the self correlation value exceeding a predetermined threshold value is calculated. When the correlation value is obtained, the bit 0 or 1 corresponding to the obtained autocorrelation value is restored. When the reader / writer 18b has finished reading the ID code from the data storage body 12, the type code is subsequently read. Regarding the reading of the type code, the read sequence of issuing the read command, the address setting command of the type area, and the pseudo random signal return command for the number of bits of the type code is executed. Thereby, the bit string based on the pseudo random signal returned from the data storage body can be restored.

FIG. 6 shows the processing operation of the reader / writer 18b for counting shown in FIG. First, the presence / absence of a data storage body is checked in step S1, and if the presence of the data storage body is detected, the ID area is read in step S2. Specifically, a read sequence for issuing a read command, an ID area address, and a pseudo random signal return command for the bits of the ID code is executed.

When the reading of the ID area is completed, step S
At 3, the type code is read. Specifically, the read sequence for issuing the read command, the type area, the address, and the pseudo random signal return command for the number of bits of the type code is executed. When the reading of the ID area and the reading of the type code are completed, the read ID code and type code are read by the host computer 26 in step S4.
Transfer to.

FIG. 7 shows a second embodiment of the settlement method of the present invention. The second embodiment is characterized in that after the ID code is written in the data storage body at the settlement place, it is checked whether or not the ID code is written normally. In FIG. 7, ~, and ~
Corresponds to the first embodiment of FIG. In the second embodiment, after further writing the ID code in the data storage body 12, as shown in, the ID code written in the data storage body 12 is read and it is checked whether or not it is written correctly. To do. The check by reading the ID code is performed by effectively utilizing the characteristic that the return data from the data storage body 12 is made by one of the two types of pseudo random signals.

FIG. 8 shows an embodiment of the reader / writer 18a installed in the settlement counter 16 of FIG. In FIG.
The reader / writer 18a is newly provided with a reading section 50, a D0 correlation calculating section 52, and a D1 correlation calculating section 54, as compared with the first embodiment shown in FIG. That is, the reader / writer 18a of the first embodiment has only the writing function, but the reader / writer 18a of the second embodiment has both the writing and reading functions.

Further, the control section 28 is provided with an error determination section 56. The error determination unit 56 instructs the data storage body 12 to write the ID code read by the card reader 24 and then read the written ID code. That is, the read sequence for issuing the read command, the ID area address setting command, and the pseudo random signal return command for the bits of the ID code is executed.

In the execution state of this read sequence, the error judgment unit 56 determines that the D0 correlation calculation unit 52 and the D1 correlation calculation unit 5
It is determined whether or not each of the autocorrelation values output from 4 exceeds a predetermined threshold value. This error determination unit 56
The determination process based on the autocorrelation output by is performed as follows. First, when all of the three data storage bodies 12 on the tray 14 of the settlement counter 16 are writing the ID code normally, the three data storage bodies 12 simultaneously read the ID from the reader / writer 18. The pseudo-random signal returned from the three data storage bodies 12 for all bits of the ID code is read out for each time when the code is read out bit by bit. Therefore, the error determination unit 56 determines that the ID code is correctly written when either one of the autocorrelation values of the D0 correlation calculation unit 52 and the D1 correlation calculation unit 54 is equal to or more than a predetermined threshold value. to decide.

On the other hand, when there is an abnormality in the writing of the ID code in any one of the three data storage bodies 12, it is possible to return a pseudo random signal corresponding to the writing bit in which the abnormality has occurred. Then, a pseudo random signal different from the bit pseudo random signal on which the correct writing has been performed is returned, and the reader / writer 18 receives the two types of pseudo random signals D0 and D1 at the same time.

Therefore, the D0 correlation calculator 52 and D1
Both of the autocorrelation values of the correlation calculation unit 54 exceed a predetermined threshold value, and at this time, the error determination unit 56 can recognize that the ID code writing abnormality has occurred. ID with reader / writer 18
When a code writing abnormality is recognized, an error notification is sent to the register device 22 as a higher-level device, and an error message is displayed on the display 36, for example, and a staff member at the checkout counter is informed of the error occurrence, and the necessary measures are taken. .

Specifically, a retry process such as re-reading the ID code by changing the disposition of the container 10 with respect to the transmitting / receiving coil 20 is performed. If there is only one container on the tray 14, the error determination unit 56 makes a determination by comparing the read ID code with the ID code read by the card reader 24 held in the control unit 28. Good.

FIG. 9 shows the processing operation of the reader / writer 18a shown in FIG. In FIG. 9, the writing of the ID code in steps S1 to S3 is the same as in the first embodiment of FIG.
When the writing of the ID code is completed in step S3, the ID area of the data storage body 12 is read in step S4.
That is, the address setting command for the ID area is issued after the read command. Then, in step S5, a pseudo random signal return command is issued.

As a result, a 1-bit pseudo-random signal accompanying the reading of the ID area is returned from the data storage side. In step S6, the pseudo random signals D0, D
It is checked whether both the autocorrelation values of 1 and the received signal are equal to or more than the threshold value. If both are not equal to or more than the threshold value, it is checked in step S7 whether all bits of the ID code have been read, Step S until reading is completed
The processes of 5 to S7 are repeated, and when the reading of all bits is completed, the process proceeds to step S8 to notify the register device 22 of normal writing.

On the other hand, in the read-back of the bit-wise pseudo-random signal in steps S5 to S7, both the auto-correlation values of the pseudo-random signals D0 and D1 obtained by either bit read are equal to or more than the threshold value. In this case, the process proceeds to step S9, it is determined that the writing of the ID code is abnormal, and the register device 22 as the upper device is notified. In the above embodiment, the case where the data storage body is provided with an E ² PROM as a non-volatile memory is taken as an example, but other than this, a RAM with a battery backup or an appropriate memory having a non-volatile function may be used. Good.

In addition, power may be supplied to the data storage body by rectifying the received voltage by electromagnetic induction coupling, or a dedicated battery may be incorporated. Furthermore, the reader / writer initializes the ID area before writing the ID code read by the card reader to the data storage body, and it is possible to surely prevent a counting error caused by the remaining ID code used last time. .

Furthermore, in the above embodiment, the case where the card reader is used for inputting the ID code is taken as an example, but the ID code is input using the keyboard or an appropriate input device. You may do it.

[0065]

As described above, according to the present invention, it is only necessary to write the user's ID code in the data storage of the tableware at the collection place, which simplifies the processing at the collection place and also on the tray. Since the writing process can be performed simultaneously on the data storage bodies of a plurality of tableware, the processing can be performed in a short time even if the number of tableware increases.

Further, since only the ID code is actually written at the settlement place, the work of the staff at the counting place, which is also performing the conventional amount counting, is greatly reduced, the ID card is read and monitored, and the system is used. It can be a light task such as guidance. Further, the totaling process performed by reading the ID code and the type code from the data storage body can be performed during the time period when the cafeteria work after washing and drying the returned tableware is completed,
It is possible to perform totaling work in a calm environment without being affected by the busyness of crowded meals.

Furthermore, when the ID code is written in the data storage body, the two types of pseudo-random signals used for bit transfer from the data storage body are used to easily check the write abnormality in the plurality of data storage bodies. It is possible to improve the reliability of the aggregation process using the data storage body.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of a settlement method of the present invention.

FIG. 2 is an explanatory diagram showing a reader / writer of the present invention used in a settlement counter.

FIG. 3 is a block diagram of a data storage used in the present invention.

FIG. 4 is a flowchart showing an ID code writing process in the settlement counter of FIG.

5 is a block diagram showing a reader / writer of the present invention used for the settlement reading of FIG.

FIG. 6 is a flowchart showing a read-out settlement process after washing and drying in FIG.

FIG. 7 is an explanatory view showing a second embodiment of the settlement method of the present invention for confirming writing.

FIG. 8 is an explanatory view showing a reader / writer of the present invention used in the settlement counter of FIG.

9 is a flowchart showing the processing operation of the reader / writer of FIG.

FIG. 10 is a block diagram of a conventional device.

FIG. 11 is an explanatory diagram of a conventional device using two types of data carriers used for tableware recognition and personal recognition.

[Explanation of symbols]

 10: Tableware 12: Data Storage Body 14: Tray 16: Settlement Counter 18a: Reader / Writer for ID Writing 18b: Reader / Writer for Settlement Reading 20a, 20b: Send / Receive Coil 22: Register Device 24: Card Reader 26: Host Computer 28, 40: control unit 30: writing unit 32, 38: transmission unit 36: display 42: memory 44: type code 46: ID area 50: read unit 52: D0 correlation calculation unit 54: D1 correlation calculation unit

Claims (5)

[Claims] 1. A method of totaling a dining room system, in which data in a data storage unit provided on tableware is read and written by a reader / writer and the amount of money used is totaled, wherein a type code indicating the type of food is stored in advance in the data storage unit. An ID code writing process of writing a user's ID code in a predetermined memory area by a reader / writer, and a reader after reading the ID code, a type code and an ID code of a data storage unit provided in the collected tableware A method of totaling a cafeteria system, comprising: a read / transfer process of reading with a writer and transferring to a host device; and a totalizing process of totaling type data for each ID code obtained in the read / transfer process. 2. The method of totalizing a cafeteria system according to claim 1, wherein in the ID code writing step, reading is performed after writing the ID code to the data storage body to set 0 or 1 of read bits of the ID code. Correspondingly, one of two types of predetermined pseudo-random signals is returned, and the reader / writer performs the autocorrelation calculation of the same signal as the two types of pseudo-random signals and the received signal in parallel. , The received bit corresponding to the autocorrelation value exceeding the threshold value is restored, and if both autocorrelation values exceed the predetermined threshold value, the host device ID A method of totaling a cafeteria system, characterized by notifying a code writing error. 3. A data storage in which a type code indicating a type of food is stored in a memory in a totaling device of a cafeteria system for totaling the amount of usage by reading / writing data in a data storage body provided on tableware with a reader / writer. A body, an ID code input means for inputting an ID code pre-assigned to the user at the time of payment, and a predetermined memory area of a data storage provided in one or more tableware placed at the payment location A first reader / writer for writing the ID code input by the code input means, and after writing the ID code, reads the type code and the ID code of the data storage body provided in the collected tableware and transfers them to the host device. , A second reader / writer for totaling the type data for each ID code, and a totaling device for a cafeteria system. 4. The totalizing device of the cafeteria system according to claim 3, wherein the data storage body has a type area in which a type code indicating a type of food is written and an ID in which an ID code indicating a user is written. A memory having an area, a control unit for reading or writing data when a predetermined command is received from the first or second reader / writer, and read data bits 0, 1 of the memory. Pseudo-random signal returning means for determining two kinds of pseudo-random signals and returning a pseudo-random signal corresponding to a read bit of the memory when a read command is received from the first or second reader / writer, The first reader / writer has at least data writing means for writing data to the data storage body in response to a predetermined command sent from the host device. The second reader / writer further comprises a data reading means for reading data from the data storage body in response to a predetermined command sent from a host device, and a pseudo random signal from the data storage body. Correlation calculation means for calculating an autocorrelation value with each of the two types of pseudo-random signals and restoring a received bit corresponding to one of the autocorrelation values exceeding a predetermined threshold value. Totalizer for the cafeteria system. 5. The summarizing device for a cafeteria system according to claim 4, wherein the first reader / writer further receives a pseudo-random signal from the data storage body and combines the pseudo-random signal with the two types of pseudo-random signals. Correlation calculation means for respectively calculating the autocorrelation value and restoring the received bit corresponding to one of the autocorrelation values exceeding a predetermined threshold value; and both autocorrelation values in the autocorrelation calculation means exceeding a predetermined threshold value. In the case of the above, the totalizing device of the cafeteria system is provided with an error determining means for notifying the host device of an error in writing the ID code.