JP2006331205A - Multiread method for radio tag, and multiread apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means capable of reading out a radio tag attached to a managed target and a radio tag stored with management information simultaneously by an identical reader/writer and also detecting the read omission of the radio tag. <P>SOLUTION: The multiread apparatus executes: a reading process for reading out information stored in first and second radio tags; a storage process for distinguishing whether information stored continuously to the identification information of information of each radio tag read out by the reading means is the information of the first radio tag or that of the second radio tag in accordance with whether the information is the identification information of the second radio tag or dummy identification information and storing the distinguished information in a storage means; a calculation process for calculating the number of controlled targets from the information of the first radio tag stored in the storage part; and a judgment means for comparing the number of controlled targets included in the information of the second radio tag which is stored in the storage part with the number of controlled targets calculated by the calculation means to judge whether both the numbers of managed targets coincide with each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a multi-read method and a multi-read device capable of simultaneously reading a wireless tag attached to a plurality of management objects and a wireless tag storing management information and preventing reading of the wireless tag attached to the management object. .

In the manufacture of an article configured by combining a plurality of parts such as a computer device, in the work management for managing the assembly check and the progress of the work, it is necessary to check the parts assembled for each assembly process.
In such a process, conventionally, for example, an assembly check is performed using a bar code attached to each component. In this case, it is necessary to individually read the barcode attached to each part using a barcode reader.

  Thus, by using a wireless tag instead of a barcode, multi-reading that reads a plurality of wireless tags at a time without reading individual components is possible, and the complexity of reading can be eliminated. However, conventionally, in the multi-reading of the wireless tag, there is no means for detecting whether or not the wireless tag attached to all the components has been completely read, so it is possible to determine whether or not there is a reading failure. could not.

In order to solve such a problem, Patent Document 1 discloses that a wireless tag is attached to a plurality of pieces of mail housed in a container, and the number of pieces of mail is displayed on a tag attached to the container using a barcode or the like. By recording using a two-dimensional code and comparing the number of radio tags affixed to the read mail items and the number of mail items recorded on the tag when multi-reading the radio tags, In addition, a method of counter-counting for determining whether or not all wireless tags have been read is disclosed.
JP 2004-115214 A (paragraphs 0011 to 0019, FIGS. 1 and 2)

  However, in the counter-counting method described in Patent Document 1, although the multi-leading wireless tag attached to the mail piece is used, the tag attached to the container in which the mail piece is stored separately uses a barcode reader or the like. It was cumbersome to read separately. Moreover, even when the tag attached to the container is replaced with a wireless tag, two wireless tag readers having different reading algorithms as described in Patent Document 1 are used in accordance with the information stored in the wireless tag. It was necessary to prepare or change the reading algorithm of the wireless tag reader and perform reading twice, which was also complicated.

  Therefore, an object of the present invention is to provide a means capable of simultaneously reading a wireless tag attached to a management target and a wireless tag storing management information with the same reader / writer, and detecting a reading failure of the wireless tag. It is to be.

  In order to solve the above-described problem, the present invention includes a first wireless tag that is affixed to each of a plurality of management targets and that includes unique identification information and individual information that identifies the type of the management target, Reading information stored in a wireless tag including a second wireless tag that includes management information for managing the identification information and management object, and reading out the first wireless tag and the second wireless tag Is a multi-read method executed by the multi-read device for detecting the identification information of the second wireless tag after the identification information is further stored in the first wireless tag, Dummy identification information is further stored following the identification information, and the management information includes individual information to be managed by the second wireless tag and information on the number of management objects for each individual information. But The reading procedure for reading the information stored in the first wireless tag and the second wireless tag, and the information stored after the identification information among the information of each wireless tag read in the reading procedure is the second Whether the wireless tag information is the first wireless tag information or the second wireless tag information is distinguished depending on whether the wireless tag is identification information or dummy identification information. A storage procedure stored in the storage unit, a calculation procedure for calculating the number of management targets for each individual information from the information of the first wireless tag stored in the storage unit, and a second wireless tag stored in the storage unit The management information and the number of management targets for each piece of individual information calculated in the calculation procedure are compared, and a determination procedure for determining whether or not they match is executed.

According to the present invention, by unifying the format that is the order of information stored in the first wireless tag and the second wireless tag, it is possible to read wireless tags of different uses with one multi-read device. . In addition, by comparing and determining information stored in the first wireless tag and the second wireless tag, it is possible to determine whether or not the wireless tag has been read out.
Further, other embodiments of the present invention will be described in detail in later-described embodiments.

  According to the present invention, it is possible to simultaneously detect a wireless tag attached to a management target and a wireless tag storing management information including the number of management targets, and detect a reading omission.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(Device configuration)
The present embodiment is an example in which the multi-lead method and multi-lead device according to the present invention are applied to an assembling operation of a computer device configured by assembling a plurality of substrates in a case.
Here, FIG. 1 is a configuration diagram showing a configuration example of the multi-read system of the present embodiment. As shown in FIG. 1, the multi-lead system of the present embodiment includes a plurality of printed circuit boards 2 that are one or more types to be managed, a first wireless tag 1 attached to each printed circuit board 2, and a computer. The device 10 includes a case 4, a second wireless tag 3 attached to the case 4, and a reader / writer 5 that reads information stored in the first wireless tag 1 and the second wireless tag 3.

  Here, the first wireless tag 1 and the second wireless tag 3 are wireless tags in which unique tag IDs are stored, for example, at the time of manufacture. The first wireless tag 1 and the second wireless tag 3 operate by converting radio waves received from the reader / writer 5 into electric power, and are stored in storage units (not shown) of the first wireless tag 1 and the second wireless tag 3. The information is transmitted to the reader / writer 5 and the information received from the reader / writer 5 is stored in the storage unit.

  Further, the reader / writer 5 corresponding to the multi-read device in the claims has a configuration capable of transmitting and receiving information to and from the first wireless tag 1 and the second wireless tag 3 by wireless communication. The reader / writer 5 includes a computer including a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), a display unit 51 for displaying various information, and the like. The CPU executes the stored program code for executing the multi-read method to be described later, and operates as the reader / writer 5 of the present embodiment for processing the information received from the first wireless tag 1 and the second wireless tag 3 To do. The reader / writer 5 can also have a configuration for transmitting and receiving information by wireless communication with the first wireless tag 1 and the second wireless tag 3 and a configuration of a computer as separate units. It is embodied by a notebook personal computer, a PDA (Personal Digital Assistant) terminal, or the like.

(Information stored in the wireless tag)
Next, information stored in the first wireless tag 1 and the second wireless tag 3 will be described in detail. In the assembly process of the computer apparatus 10, there are cases where the printed circuit boards 2 are mounted in different combinations according to customer requirements. For example, a plurality of printed circuit boards 2 having the same function, such as a network board, may be mounted. is there. Therefore, the printed circuit board 2 may be configured by combining a plurality of types in the computer device 10.
For this reason, the first wireless tag 1 attached to the printed circuit board 2 includes individual information that can identify the type of each printed circuit board 2 and corresponds to “information for specifying the type of management target” in the claims. In addition, information including a management tag ID that is a tag ID of a wireless tag that manages the first wireless tag 1 is stored, and the printed circuit board 2 that is assembled to the case 4 of the computer device 10 is stored in the second wireless tag 3. The management information including the individual information indicating the format and the number of pieces of information is stored.

Here, FIG. 2 is a drawing showing the data format of the first wireless tag 1 attached to the printed circuit board 2 and the second wireless tag 3 attached to the case 4, and FIG. The data format of the information stored in the tag 1 is shown. As shown in FIG. 2A, the information stored in the first wireless tag 1 is associated with the tag ID 101 unique to the first wireless tag 1 and the higher rank of the first wireless tag 1 from the top. Management tag ID 102 for storing the tag ID of the management wireless tag, individual information 103 for storing information on the type of the printed circuit board 2 to which the first wireless tag 1 is attached, and trace information for storing progress information and the like 104.
Since the tag ID 101 is information unique to the first wireless tag 1, it can be used as an ID unique to the printed circuit board 2 to which the first wireless tag 1 is attached.

FIG. 2B shows a data format of information stored in the second wireless tag 3 which is a management wireless tag. As shown in FIG. 2B, the information stored in the second wireless tag 3 is associated with the tag ID 201 unique to the second wireless tag 3 and the higher order of the second wireless tag from the top. The management tag ID 202 for storing the tag ID of the management wireless tag and the management information 203 corresponding to the types of the plurality of printed circuit boards 2 arranged in the case 4 are configured. Further, each management information 203 includes individual information 204 of each printed circuit board 2 (first wireless tag 1) and the number 205 of printed circuit boards 2 (first wireless tag 1).
Since the tag ID 201 is information unique to the second wireless tag 3, it can be used as an ID unique to the case 4 to which the second wireless tag 3 is attached.
Further, in the present embodiment, the management tag ID 202 stored in the second wireless tag 3 has no management wireless tag associated with the upper level (because it is the highest level wireless tag). In order to indicate that, invalid information (for example, all bits are '0', etc.) is stored.

Next, FIG. 3 shows information stored in the first wireless tag 1 and the second wireless tag 3 in accordance with the format of information stored in the first wireless tag 1 and the second wireless tag 3 shown in FIG. It is drawing which shows the example of. The example shown in FIG. 3 corresponds to the computer apparatus 10 shown in FIG. 1, and includes four first wireless tags 1 attached to four printed boards 2 and one attached to the case 4. An example in which the second wireless tag 3 is configured is shown.
The information stored in the first wireless tag 1 shown in FIG. 3A includes the information 100a stored in the first wireless tag 1 whose tag ID 101 is '100100' and the information stored in the first wireless tag 1 whose tag ID 101 is '100101'. Information 100b stored in one wireless tag 1, information 100c stored in the first wireless tag 1 whose tag ID 101 is '100102', and stored in the first wireless tag 1 whose tag ID 101 is '100103' All of the management tag IDs 102 of the information (100a to 100d) configured by the information 100d and stored in each first wireless tag 1 are the tag IDs 201 of the second wireless tag 3 shown in FIG. “200100” is stored, indicating that the four first wireless tags 1 are managed by the second wireless tag 3.

In addition, in the individual information 103 of the information stored in the first wireless tag 1 indicated by the reference numerals 100a and 100b, 'CIF100' is used as an example indicating the type of the printed circuit board 2, and the first wireless tag indicated by the reference numeral 100c. 'MB120' indicating another type is stored in the individual information 103 stored in information 1, and another type is stored in the individual information 103 stored in the first wireless tag 1 indicated by reference numeral 100d. 'VD300' is stored.
In the example shown in FIG. 3A, the trace information 104 of information stored in each first wireless tag indicated by reference numerals 100a to 100d is blank, and no information is stored at this time. It shows no.

On the other hand, the management tag ID 202 of the information stored in the second wireless tag 3 indicated by reference numeral 200 in FIG. 3B indicates that there is no management wireless tag associated with the upper level, that is, the highest level tag. “000000” indicating that the tag is a wireless tag is stored. Further, in the management information 203a, “CIF100” is stored as individual information 204a of information stored in the first wireless tag 1 indicated by reference numerals 100a and 100b, and “2” is stored as the number 205a thereof. In the management information 203b, “MB120” and “1” as the number 205b of the individual information 204b of the information stored in the first wireless tag 1 indicated by the symbol 100c are denoted by the symbol 100d. 'VD300' is stored as the individual information 204c of the information stored in the first wireless tag 1 shown, and '1' is stored as the number 205c thereof.
Further, in order to indicate that there is no more information to be managed, the next management information 203d stores “000000” as the individual information 204d and “0” as the number 205d.
In this manner, the information (100a to 100d) stored in the first wireless tag 1 is associated with the information 200 stored in the second wireless tag 3.

  Of the information stored in the first wireless tag 1 and the second wireless tag 3, the tag IDs (101, 201) are unique information given when the wireless tag is manufactured. The information is written in advance based on the specifications of the computer device 10 when the first wireless tag 1 and the second wireless tag 3 are attached to the printed circuit board 2 and the case 4, respectively.

(Multi-read method)
Next, information indicated by reference numerals 100a to 100d stored in the four first wireless tags 1 in FIG. 3A and stored in one second wireless tag 3 in FIG. 3B. A process performed in the reader / writer 5 when multi-reading the information indicated by reference numeral 200 will be described with reference to the flowchart shown in FIG.
Hereinafter, the first wireless tag 1 in which the information indicated by the reference numerals 100a to 100d in FIG. 3A is stored will be referred to as the first wireless tag 100a to the first wireless tag 100d, respectively. The second wireless tag 3 storing the information indicated by reference numeral 200 in FIG. 3B is referred to as a second wireless tag 200 for the sake of explanation.
In addition, the first wireless tag 100a to the first wireless tag 100d and the second wireless tag 200 are collectively referred to simply as a wireless tag.

In a check process for checking whether or not the printed circuit board 2 assembled in the computer apparatus 10 is appropriate, an operator who performs the check first attaches the reader / writer 5 to the first printed circuit board 2 and the case 4. The wireless tag is read over the wireless tag 1 and the second wireless tag 3.
When multi-reading of the wireless tag is started by the work of the worker, the reader / writer 5 transmits a response request to the wireless tag in the communicable range (step S10). At this time, the wireless tag communicable with the reader / writer 5 responds in response to the response request transmitted in step S10, transmits information stored in the wireless tag, and the reader / writer 5 "Data reading" is performed to store the information stored in (step S11).

  Here, the details of the “data reading” process in step S11 are shown in the flowchart of FIG. The “data reading” process in step S11 will be described in detail with reference to the flowchart shown in FIG.

The information stored in one of the wireless tags communicable with the reader / writer 5 is acquired (step S20). The reader / writer 5 includes the management tag ID (102, 202) shown in FIG. 3 included in the acquired information. Is determined to be valid (step S21), and it is determined whether the acquired wireless tag information is for the first wireless tag (100a to 100d) or the second wireless tag 200. .
That is, as shown in FIG. 3A, since the first wireless tags (100a to 100d) store '200100' which is an effective management tag ID 102, the first wireless tags (100a to 100a) are stored. ˜100d), and as shown in FIG. 3B, the second wireless tag 200 stores “000000”, which is an invalid management tag ID 202. Can be determined.

In step S21, if the management tag ID (102, 202) is valid (“Yes” in step S21), the reader / writer 5 determines that the wireless tag is the first wireless tag (100a to 100d). The information acquired from the wireless tag is stored in an individual information table provided with a storage area in a storage unit such as a RAM of the reader / writer 5 (step S22), and the process returns to step S11 shown in FIG. Proceed to step.
In step S21, if the management tag ID (102, 202) is invalid (in the case of “No” in step S21), the wireless tag is acquired from the wireless tag as being the second wireless tag 200. The information is also stored in a management information table in which a storage area is provided in the storage unit (step S23), and the process returns to step S11 shown in FIG. 4 and proceeds to the next step.

Here, FIG. 6A shows an example of information included in the individual information table stored in the storage unit of the reader / writer 5 in step S22. As shown in FIG. 6A, the individual information table 300 stores information of each first wireless tag (100a to 100d) for each record, and includes a tag ID 301, a management tag ID 302, and individual information. It can be seen that it is composed of 303 and trace information 304.
FIG. 6B illustrates an example of information included in the management information table stored in the storage unit of the reader / writer 5 in step S22. As shown in FIG. 6B, the management information table 400 is composed of records corresponding to the number of management information (203a to 203c) of the second wireless tag 200 shown in FIG. It can be seen that it is composed of the tag ID 401 of the second wireless tag 3, the individual information 404 of the printed circuit board 2 constituting the management information (203 a to 203 c), and the number 405 thereof.

  In a series of processes from acquisition of information from the wireless tag (step S20) to storage of the acquired information in the individual information table 300 or the management information table 400 (step S22 or step S23), the management stored in the wireless tag The processing is switched in accordance with the tag IDs (102, 202), and even when the number of the first wireless tags (100a to 100d) and the second wireless tags 200 and the number of management information further increase, the same applies. Processing is possible.

When the storage of information in the individual information table 300 or the management information table 400 (step S22 or step S23) ends, the process returns to FIG. 4 to determine whether there is a response from another wireless tag (step S12). If there is a response from another wireless tag (“Yes” in step S12), the process returns to step S11 to process information acquired from the other wireless tag.
If there is no response from another wireless tag (“No” in step S13), the reader / writer 5 is stored in the individual information table 300, assuming that communication with the readable wireless tag is completed. A “comparison determination” process is performed to determine whether the information matches the information stored in the management information table 400 (step S13).

  Details of the “comparison determination” process in step S13 are shown in the flowchart of FIG. The process of “comparison determination” in step S13 will be described in detail with reference to the flowchart shown in FIG. 7 (see FIG. 6 as appropriate).

  First, the reader / writer 5 determines whether or not there is a record in the management information table 400 (step S30). If there is no record (“No” in step S30), the reader / writer 5 reads the second wireless tag 200. It is determined as a failure, “mismatch” is output, and the process returns to step S13 shown in FIG. If there is a record in the management information table 400 (“Yes” in step S30), information for one record is extracted from the information stored in the management information table 400 (step S31), and the tag ID 401 and individual information are extracted. By searching for records having matching management tag ID 302 and individual information 303 from each record stored in the individual information table 300 using 404 as a search key, the number of retrieved records is calculated. The number of matching records is calculated from the records in the individual information table 300 (step S32).

Then, it is determined whether or not the number of records calculated in step S32 matches the number 405 items stored in the record of the management information table 400 (step S33). In the case of “No” in S33), it is determined that the reading of the first wireless tags (100a to 100d) has failed, “no match” is output, and the process returns to step S13 shown in FIG.
If they match ("Yes" in step S33), it is determined whether all records in the management information table 400 have been extracted (step S34). If all the records have not been extracted (“No” in step S34), the process returns to step S31 to extract the next record. If all the records have been extracted (“Yes” in step S34), it is determined that the information of the individual information table 300 and the management information table 400 is consistent, and “match” is output. The process returns to step S13 shown in FIG.

Returning to FIG. 4, in the determination procedure of step S <b> 30 or step S <b> 33 (see FIG. 7), when “match” (“match” in step S <b> 13), the reading is performed normally as it is. In other words, a display indicating that the printed circuit board 2 is properly assembled is displayed on the display unit 51 of the reader / writer 5 and the processing is terminated (normal termination).
When the reader / writer 5 is normally terminated, the process of the reader / writer 5 is taken over to the subsequent process such as the update of the trace information 104 of the first wireless tag 1 shown in FIG.

  Further, in the determination procedure of step S30 or step S33 (see FIG. 7), when “mismatch” is found (in the case of “mismatch” in step S13), the procedure of “data reading” in step S11 is executed. It is determined whether or not the number of times is a predetermined number of abnormal terminations (step S14).

Here, if the number of executions of the “data reading” procedure is not the number of abnormal terminations (in the case of “No” in step S14), the “data reading” procedure in step S11 is retried. The abnormal end count is a predetermined count stored in the reader / writer 5 in advance.
In addition, when the number of executions of the “data reading” procedure becomes the number of abnormal terminations (in the case of “Yes” in step S14), the reading has terminated abnormally, that is, the first wireless tag 1 and the second wireless tag 3 or the reader / writer 5 is faulty or there is an error in the work content, the management device 6 displays the abnormal end on the display unit 51 of the reader / writer 5 and ends the processing (abnormal end).

As described above, according to the present embodiment described above, since the data formats of the first wireless tag 1 and the second wireless tag 3 are common, multi-reading of wireless tags having different applications is performed using one reader / writer 5. be able to.
In addition, the second wireless tag 3 that is a wireless tag for management stores individual information 204 that identifies the type of the first wireless tag 1 that is a wireless tag attached to a management target, and the number 205 of the individual information 204. It is possible to determine whether or not the multi-reading of the wireless tag has been performed reliably.
In addition, when reading of the second wireless tag 3 that is a management wireless tag fails, it is possible to improve multi-read reliability by retrying the reading.

In the above-described embodiment, the example in which the present invention is applied to the check process in manufacturing the computer apparatus 10 has been described. However, the present invention can be applied to various other processes. For example, in a manufacturing process or inspection process that manufactures a product by combining multiple parts such as electrical appliances and control panels, a wireless tag storing individual information is affixed to each part, and the exterior of electrical appliances and control panels is used. The present invention can also be applied to a case where a wireless tag for management is attached and these wireless tags are multi-read.
In addition, when transferring a plurality of parts, a wireless tag storing individual information is attached to each of these parts, and a management wireless tag is attached to a transporting device that transfers a rack or container, The same applies.

  Further, in the above-described embodiment, the information is stored in the first wireless tag 1 and the information stored in the second wireless tag 3 that is the management wireless tag is associated with the information stored in the second wireless tag 3. Although shown, for example, a multi-layer having three layers is formed by associating information stored in a third management wireless tag attached to a container that stores a plurality of computer devices 10 further above the second wireless tag 3. It is possible to implement a multi-read method having more layers as long as it is in the form of reading or within the reading range of the reader / writer 5.

  Therefore, the present invention is not limited to the embodiments described above, but is defined by the technical idea described in the claims.

It is a block diagram of a multi lead system. FIG. 2A is a diagram showing a format of information stored in the first radio tag, and FIG. 2B is a diagram showing a format of information stored in the second radio tag. FIG. 3A is a diagram illustrating an example of information stored in the first wireless tag, and FIG. 3B is a diagram illustrating an example of information stored in the second wireless tag. It is a flowchart which shows the process sequence in a reader / writer. It is a flowchart which shows the procedure of data reading in detail. It is drawing which shows the table information stored in the reader / writer, (a) is drawing which shows an individual information table, (b) is drawing which shows a management information table. It is a flowchart which shows the process sequence of a comparison determination in detail.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st wireless tag 2 Printed circuit board 3 2nd wireless tag 4 Case

Claims (5)

A first wireless tag that is affixed to each of a plurality of management targets and includes unique identification information and individual information that identifies the type of the management target, and management for managing the unique identification information and the management target A multi-reader executed by a multi-read device that reads information stored in a wireless tag including a second wireless tag that contains and stores information, and detects reading omission of the first wireless tag and the second wireless tag. A lead method,
The first wireless tag further stores the identification information of the second wireless tag following the identification information,
The second wireless tag further stores dummy identification information subsequent to the identification information, and the management information includes the management target individual information and the individual information managed by the second wireless tag. Information on the number of management targets for each
The multi-lead device is
A reading procedure for reading information stored in the first wireless tag and the second wireless tag;
Of the information of each wireless tag read in the reading procedure, the information stored subsequent to the identification information is the identification information of the second wireless tag or the dummy identification information. A storage procedure for distinguishing whether the information of the wireless tag is the information of the first wireless tag or the information of the second wireless tag, and storing each in the storage unit of the multi-read device,
A calculation procedure for calculating the number of management objects for each individual information from the information of the first wireless tag stored in the storage unit;
A determination procedure for comparing the management information of the second wireless tag stored in the storage unit with the number of management targets for each individual information calculated in the calculation procedure to determine whether or not they match. And including,
A multi-read method of a wireless tag characterized by the above. In the storing procedure, when the information stored in the second wireless tag is not stored in the storage unit, the reading procedure is executed a predetermined number of times until the information is stored in the storage unit.
The multi-read method for a wireless tag according to claim 1. In the determination procedure, the number of management targets for each individual information calculated in the calculation procedure and the information on the number of management targets for each individual information included in the management information of the second wireless tag , If they do not match, execute the reading procedure a predetermined number of times until they match,
The method of multi-reading a wireless tag according to claim 1 or 2, wherein: A first wireless tag that is affixed to each of a plurality of management targets and includes unique identification information and individual information that identifies the type of the management target, and management for managing the unique identification information and the management target A multi-lead device that reads information stored in a wireless tag including a second wireless tag that includes information and stores the first wireless tag and detects that the second wireless tag is not read;
The first wireless tag further stores the identification information of the second wireless tag storing the management information following the identification information,
The second wireless tag further stores dummy identification information subsequent to the identification information, and the management information includes the management target individual information and the individual information managed by the second wireless tag. Information on the number of management targets for each
The multi-lead device is:
Read information stored in the first wireless tag and the second wireless tag;
Of the information on each wireless tag, the information stored subsequent to the identification information is the identification information on the second wireless tag or the dummy identification information. Distinguishing whether it is the information of the first wireless tag or the information of the second wireless tag,
Each is stored in the storage unit of the multi-read device, and from the stored information of the first wireless tag, the number of management objects for each individual information is calculated,
Comparing the management information of the second wireless tag stored in the storage unit with the calculated number of management targets for each individual information, and determining whether or not they match.
A multi-lead device for a wireless tag characterized by the above. When the number of management targets for each individual information calculated by the multi-read device does not match the information on the number of management targets for each individual information included in the management information of the second wireless tag, And when the information stored in the second wireless tag is not stored in the storage unit,
Reading the information stored in the first wireless tag and the second wireless tag a predetermined number of times;
The multi-read device for a wireless tag according to claim 4.

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