JP2010006567A - Positional information writing device, positional information display, article management system, article management method, and article management program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a positional information writing device can specify the position of a read IC tag upon reading the IC tag, a positional information display, an article management system, an article management method, and an article management program. <P>SOLUTION: A positional information writing system 110 includes a positional information generating device 10 for generating positional information for specifying an installment position of an article to which an IC tag 50 is attached, and an IC tag writer 11 for recording the positional information in the IC tag 50. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a position information writing apparatus, a position information display apparatus, an article management system, an article management method, and an article management program that support operations such as assembling articles using an IC tag.

  IC tags (tags with non-contact type ICs) are attached to machine parts and building materials, and part names or material names, lot numbers, part IDs, etc. are recorded, and such information is recorded when parts and materials are distributed. The method used for management has been put into practical use.

  At distribution management sites, IC tags are affixed to each of a plurality of parts and materials loaded on a pallet or the like, or a box or packing material for storing them, and read at once using a high-output IC tag reader. Thus, distribution management of a plurality of parts and materials is also performed collectively.

  However, with such a distribution management method, if any one of the IC tags that could not be read matches, it is necessary to manually search for all the IC tags that could not be read. This is because the position of the read IC tag cannot be specified when the IC tag is read.

  Further, in such a distribution management method, the information recorded on the IC tag is only information for distribution management, so the information recorded on the IC tag has not been used for purposes other than distribution.

  On the other hand, in assembly work and construction work of machines, work is performed with reference to drawings. However, in general, only the completed type of the machine or structure is shown in the drawing, so it is skillful to infer from the drawing which part of the machine or structure corresponds to a part or material. It is difficult unless you are a person.

  In particular, when there are parts and materials that are difficult to distinguish by appearance, there is no problem if they are the same, but if they are different parts and materials, they must be distinguished and installed in their respective positions. . Therefore, it has been necessary to identify parts and materials during assembly work by marking parts and materials.

As a technology related to supporting an assembly operation of components using an IC tag, there is an “assembled component confirmation system” disclosed in Patent Document 1.
The invention disclosed in Patent Document 1 reads out component information from an IC tag attached to each component in a non-contact manner, and determines whether the assembly relationship is correct based on the parent-child relationship information stored in the parent-child component information table. However, when it is detected that the assembly is wrong, a warning is issued.
JP 2005-35327 A

  In general, when information recorded on an IC tag is read by an IC tag reader, the IC tag reader cannot recognize where the IC tag is located when the information is read. For this reason, the invention disclosed in Patent Literature 1 can detect and issue a warning when an incorrect part is assembled. However, it cannot be detected that the correct part is attached to the wrong position.

  As described above, in the invention disclosed in Patent Document 1, it can be detected that an incorrect part has been assembled or that a part to be originally assembled has not been assembled, but the machine or structure is configured. An operator cannot recognize which part or material is applied to. For this reason, although the work for confirming whether or not the assembly work is correctly performed can be supported, the assembly work itself cannot be supported.

  That is, in a system as disclosed in Patent Document 1, information regarding the position of an article to which an IC tag is attached and the position where the article should be originally installed cannot be obtained when the IC tag is read. It was.

  The present invention has been made in view of the problem, and when reading an IC tag, a position information writing device, a position information display device, an article management system, an article management method, and an article management method that can specify the position of the read IC tag. The object is to provide an article management program.

  In order to achieve the above object, the present invention provides, as a first aspect, means for generating position information for specifying an installation position of an article to which an IC tag is attached, and writing means for recording the position information on the IC tag. There is provided a position information writing device characterized by comprising:

  In order to achieve the above object, the present invention provides, as a second aspect, position information for specifying the installation position of the article as a coordinate value in an arbitrary coordinate system from an IC tag attached to the article, and the like. Means for reading out related article information specifying the installation position of the article as a coordinate value in an arbitrary coordinate system, and means for displaying the positional relationship between the article and other articles as an image based on the position information and the related article information; There is provided a position information display device characterized by comprising:

  In order to achieve the above object, the present invention provides, as a third aspect, means for generating position information for specifying an installation position of an article to which an IC tag is attached, and writing for recording the position information on the IC tag. A position information writing device comprising: means for reading out position information from an IC tag attached to the article; and a position information display device comprising means for displaying the position information. An article management system is provided.

  Moreover, in order to achieve the said objective, this invention is a process which produces | generates the positional information which specifies the installation position of the articles | goods to which an IC tag is attached including the coordinate value in arbitrary coordinate systems as a 4th aspect. An article management method comprising: generating related article information that specifies an installation position of another article as a coordinate value in an arbitrary coordinate system; and a writing process of recording the position information on an IC tag Is to provide.

  In order to achieve the above object, according to a fifth aspect of the present invention, there is provided, as a fifth aspect, position information for specifying an installation position of the article including coordinate values in an arbitrary coordinate system from an IC tag attached to the article. , A reading step of reading out related article information specifying the installation position of another article as a coordinate value in an arbitrary coordinate system, and displaying the positional relationship between the article and the other article as an image based on the position information and the related article information There is provided an article management method characterized by comprising the steps of:

  In order to achieve the above object, the present invention provides, as a sixth aspect, an article management program characterized by causing a computer to execute the article management method according to the fourth or fifth aspect of the present invention. To do.

  According to the present invention, it is possible to provide a position information writing device, a position information display device, an article management system, an article management method, and an article management program that can specify the position of the read IC tag when the IC tag is read.

[First Embodiment]
FIG. 1 shows a configuration of an article management system according to the first embodiment in which the present invention is suitably implemented. As shown in FIG. 1A, this system includes a position information writing system 110 and a position information display system 210. As shown in FIG. 1B, the position information writing system 110 includes a position information generation device 10 that generates position information of a component, and an IC tag writer 11 that records information on an IC tag 50. As shown in FIG. 1C, the position information display system 210 includes an IC tag reader 21 that reads information from an IC tag and an information display device 20 that displays information read by the IC tag reader 21. The IC tag reader 21 and the information display device 20 may be integrated.
The position information writing system 110 is installed at an article distribution source (such as a parts factory). Further, the position information display system 210 is installed at a distribution destination (such as an assembly workshop or a construction site) of articles.

  The IC tag 50 is attached to an article (hereinafter referred to as a part) such as a machine part or a building material, a box, or the like. In the following description, the IC tag 50 is attached to a component.

  The IC tag writer 11 records the position information generated by the position information generation device 10 in the IC tag 50. Here, the position information is information for specifying the position of the component, and the format of the information is arbitrary. For example, the position information may be a value indicating coordinates in an arbitrary space, a value indicating a relative positional relationship with other components, or information specifying an arbitrary region. May be. Examples include coordinate values in an orthogonal coordinate system, an oblique coordinate system, and a polar coordinate system with an arbitrary point as the origin, information such as “above A part” and “right of B part”, Information such as “materials” and “parts for transmission”. Further, two or more kinds of these pieces of information may be included.

  The IC tag 50 in which the position information is recorded is attached to the part and conveyed to a distribution destination. At the distribution destination, the position information recorded on the IC tag 50 is read by the IC tag reader 21 and sent to the information display device 20. The information display device 20 displays position information input from the IC tag reader 21. By referring to this information, workability of a person who performs work (such as machine assembly work or building work) at the distribution destination is improved.

  By recording the installation position of the component as a coordinate value in a three-dimensional space, the coordinate value recorded in the IC tag 50 is read even when there are a plurality of components having the same shape and cannot be distinguished from the appearance. Thus, it is possible to distinguish which part should be the part to be installed. For example, in FIG. 2, the parts A, B, and C have the same shape and cannot be distinguished from each other in appearance, but the coordinate value recorded on the IC tag 50 attached to each of them has a different z value. It becomes possible to identify whether it should be installed.

Also, by recording information indicating the relative positional relationship with the other component on the IC tag 50, the operator can easily recognize what work should be performed during the assembly work. For example, if the information of assembling on the part A is recorded in the IC tag 50 attached to the part B, the operator can easily recognize that the assembling work shown in FIG. .
Furthermore, by recording the shape and installation position of a part as a coordinate value in a three-dimensional space together with the relative positional relationship, the assembly operator can accurately determine which part of another part is to be assembled. Can be recognized. For example, as shown in FIG. 4, the operator can easily recognize that the part B is assembled in the area indicated by the dotted line on the part A.

  On the other hand, when information specifying an arbitrary area is recorded on the IC tag 50, the operator can easily recognize to which part of the entire product the part is applied.

  In general, the resolution as position information increases in the order of information for specifying a region → information indicating a relative positional relationship → coordinate value. Therefore, it is possible to specify the installation position of a component with high accuracy only by the coordinate value. is there. However, if the installation positions of all the components are to be specified only by the coordinate value, the value of the coordinate value becomes too large, which may be inefficient in calculation or the like. For this reason, by combining and recording information with different resolutions, it is possible to more easily identify the position where the component is installed in the entire product. For example, by writing information such as the position of Dmm (coordinate value) from the end on the C part (relative relationship) of the engine part (area) to the IC tag, the worker is attached with the IC tag. The position where the component is installed can be recognized accurately and easily.

  In addition, as shown in FIG. 5, you may set a different coordinate system for every area | region.

  In the above description, the case where the IC tag 50 is attached to a part is taken as an example. However, the position information is provided so that the IC tag 50 attached to a pass box or packing material can be specified on the pallet. You may make it write. For example, it is only necessary to record on the IC tag 50 what number of rows and boxes from which end the stacking boxes are stacked. As a result, even when there are IC tags that could not be read when reading a plurality of IC tags from a box or the like loaded on the same pallet, it is possible to easily identify which IC tag was a reading error. Become. As a result, there is no need to manually search for a box or the like to which the IC tag that has failed to be read is attached.

[Second Embodiment]
A second embodiment in which the present invention is suitably implemented will be described.
FIG. 6 shows a specific configuration of the component management system according to the present embodiment. This system includes a position information writing system 100 including a CAD 101 and an IC tag writer 102, and a position information display system 200 including an IC tag reader 201 and a viewer 202.

The CAD 101 is a device used for designing machines and structures, and includes a user interface and a display device. A user can design a machine or a structure by performing an input operation through a user interface while referring to information displayed on the display device. CAD101 produces | generates the information which shows the shape of the components and materials used as an element of a machine or a structure, and an installation position using the coordinate value in XYZ coordinate space. In addition, information such as names (model numbers) of parts and materials is also generated. The CAD 101 can also realize its function by causing a computer to execute software.
The IC tag writer 102 records information input from the CAD 101 on the IC tag 50.

  As illustrated in FIG. 7A, the CAD 101 includes a shape information generation unit 1011, a position information generation unit 1012, a related component information generation unit 1013, and an IC tag information storage unit 1014. The display device 1015 and the user interface 1016 may be integrated with the CAD 101 or may be separate configurations. When the function of the CAD 101 is realized by software processing by a computer, the shape information generation unit 1011, the position information generation unit 1012, and the related component information generation unit 1013 are formed on the CPU of the computer.

  The shape information is information indicating the shape of the part. The shape of the component may be selected from predefined component shapes, or an arbitrary shape may be specified by designating a plurality of vertices. It is also possible to select only the schematic shape of the part and specify the dimensions of each part.

  In the present embodiment, the position information is information indicating the installation position of the component using coordinate values in the XYZ coordinate space. If the shape of the part is predefined, indicate the installation position of the part by specifying one or more specific positions (vertex, center of gravity, etc.) of the part as shown in FIG. Can do. Also, when a shape is specified by specifying a plurality of vertices, as shown in FIG. 8B, the installation position of the component may be indicated by the coordinates of the component vertex in the area where the component is arranged. it can. Further, when selecting only the rough shape of the part and specifying the dimensions of each part, one or more specific positions (vertex, center of gravity, etc.) of the part are specified as shown in FIG. Thus, the installation position of the component can be indicated. These pieces of information are associated with each other and accumulated in the IC tag information storage unit 1014 as IC tag information.

  As shown in FIG. 7B, the IC tag writer 102 includes an IC tag information acquisition unit 1021, a write format conversion unit 1022, and a write processing unit 1023. The IC tag information acquisition unit 1021 acquires the IC tag information recorded in the IC tag information storage unit 1014. The write format conversion unit 1022 converts the IC tag information into an arbitrary format suitable for writing to the IC tag 50. The writing processing unit 1023 writes information into the IC tag 50 by wireless communication.

The IC tag reader 201 reads information recorded on the IC tag 50 and outputs it to the viewer 202. The IC tag reader 201 is preferably a handy type having excellent portability.
The viewer 202 restores and displays shape information and installation information based on the coordinate values in the XYZ coordinate space input from the IC tag reader 201.

As illustrated in FIG. 9, the IC tag reader 201 includes a reading processing unit 2011, a reading format conversion processing unit 2012, and an IC tag information output unit 2013. The reading processing unit 2011 receives a radio signal emitted from the IC tag 50. The reading format conversion unit 2012 converts the IC tag information into an arbitrary format of shape information, position information, and related component information. The IC tag information output unit 2013 outputs the IC tag information to the viewer 202.
Based on the shape information, position information, and related component information input from the IC tag reader 201, the viewer 202 draws and displays components and related components in a three-dimensional manner. The viewer 202 can also realize its functions by causing a computer to execute software.

  FIG. 10 shows an example of information recorded on the IC tag 50. In the IC tag, the part name of the part to which it is attached, the part ID, the shape information indicating the shape of the part, the position information indicating the installation position of the part, and the relationship indicating the shape and installation position of the part related to the part Component information is recorded. Here, the component name and the component ID are information used for distribution management. In addition, as shown in FIG. 11, by defining the position of the vertex using a common coordinate system in related parts, both the shape (shape information) and the installation position (position information) of the part by the coordinate value itself. Can also be shown.

  As shown in FIG. 12, when a product is composed of a part A, a part B, a part C, and a part D, the relationship between the parts can be schematically represented as a tree structure in the figure. In the IC tag, information corresponding to such a tree structure is recorded in an arbitrary format as information indicating the relationship between components. In addition, although the example which records only the information of a child component in an IC tag as information which shows the relationship between components was shown here, you may make it record the information of a parent component, and both a parent component and a child component may be recorded. Information may be recorded.

The operation of the system will be described. Here, a case where the product is composed of two parts, part A and part B is taken as an example. The parts A and B are registered as parts that are related to each other.
When the product design is completed by a user operation, the CAD 101 generates a part name, a part ID, shape information, and position information for each element (part A, part B) constituting the product, and an IC tag information storage unit 1014. To record.

  The IC tag writer 102 acquires the IC tag information recorded in the IC tag information storage unit 1014, and records each information described above for each IC tag 50 attached to each component.

  The IC tag 50 in which the part name, the part ID, the shape information, and the installation position information are recorded is attached to the part A and the part B, respectively, and conveyed to the assembly work place.

  In the part delivery process, distribution management is performed based on the part name and part ID recorded in the IC tag 50. Since the management method in the distribution process is publicly known, the description is omitted.

  When the IC tag 50 attached to the part A or the part B is read by the IC tag reader 201 in the assembly work place, the information read from the IC tag 50 is output to the viewer 202. When the IC tag 50 attached to the component A is read, in addition to the shape information and position information of the component A, the shape information and position information of the related component B and the related component information are both stored in the viewer 202. Entered. Therefore, the viewer 202 generates and displays an image that three-dimensionally shows a state in which the component A and the component B are installed at predetermined positions based on such information. In this case, as shown in FIG. 13A, it is preferable to highlight the component A which is the component from which the IC tag 50 is read. This facilitates component identification. Similarly, when the IC tag 50 attached to the component B is read, the component B may be highlighted as shown in FIG.

  In this way, by recording the shape and installation position of related parts together with information indicating the shape and installation position of the part as coordinate values in a three-dimensional space, the assembled shape can be displayed in three dimensions by the viewer 202. It becomes. Thereby, it is not necessary to infer three-dimensional information from the drawing, and the structure can be accurately recognized.

  In the above embodiment, the case where the position of the part is specified by the XYZ coordinate value is taken as an example. However, in the case of the IC tag 50 attached to a building material or the like, as shown in FIG. The position in the space may be specified using a layer (hierarchy) instead of the coordinate value. For example, by recording information such as “Layer 2 3-C”, it is possible to specify the position where the material is installed. Note that the specification of the position in the space by the section and the layer is substantially the same as the case where the coordinate value is limited to an integer value when the position is specified by the XYZ coordinate value.

[Third Embodiment]
A third embodiment in which the present invention is preferably implemented will be described. FIG. 15 shows the configuration of the component management system according to the present embodiment. The present embodiment is different from the second embodiment in that the information processing terminal 300 is connected to the CAD 101 via the network 400.
Here, as shown in FIG. 16, the CAD 101 stores a parts list 1015 relating to an arbitrary product designed in the past.
The information processing terminal 300 can access the CAD 101 via the network 400.

The operation of the system will be described. Since operations related to writing data to the IC tag 50 and reading data from the IC tag 50 are the same as those in the second embodiment, only other operations will be described.
FIG. 17 shows an example of the operation sequence of the system.
When a part ordering application incorporated in the information processing terminal 300 is activated (S1), the information processing terminal 300 outputs an access request to the CAD 101 via the network 400 (S2). In response to the access request from the information processing terminal 300, the CAD 101 notifies the information processing terminal of the parts list (S3). In this case, a known authentication process (password authentication or the like) may be performed so that only a specific user can refer to the component list 1015.

  The information processing terminal 300 notified of the parts list 1015 from the CAD 101 displays a message prompting selection of the parts to be ordered together with the parts list 1015 (S4). The item of the list includes IC tag information, and the content of the IC tag information can be confirmed from the information processing terminal 300.

When at least one component is selected by the user's input operation (S5), the information processing terminal outputs information specifying the selected component to the CAD 101 (S6).
The CAD 101 reads information to be recorded in the IC tag 50 from the database for all the parts specified by the information input from the information processing terminal 300 (S7). The CAD 101 outputs the read IC tag information to the IC tag writer 102 (S8).
The IC tag writer 102 records information on the IC tag 50 attached to each component (S9). The IC tag 50 on which information is recorded is attached to the corresponding component.

  In the present embodiment, since parts are ordered using the parts list 1015 stored in the CAD 101, it is possible to reduce the possibility of delivering wrong parts or wrong delivery numbers.

[Fourth Embodiment]
A fourth embodiment in which the present invention is preferably implemented will be described. FIG. 18 shows a configuration of a component management system according to the present embodiment. In the present embodiment, the information processing terminal 500 is connected to the IC tag reader 201. A measuring instrument 600 is connected to the information processing terminal 500. The rest is the same as in the second embodiment.

  The measuring device 600 is a device for measuring the shape and position of a component, and may be a non-contact type using a laser beam or a contact type using a probe.

  In the present embodiment, coordinate values in the XYZ coordinate system are recorded in the IC tag 50 as position information.

Actual values obtained by measuring the shape and position of the assembled product with the measuring instrument 600 are input to the information processing terminal 500. In the information processing terminal 500, the IC tag reader 201 compares the product shape information and position information acquired by reading the IC tag with the actual measurement value input from the measuring device 600.
Thereby, it can be judged immediately whether the assembly | attachment position of components is incorrect. Therefore, it can be suitably applied to finished product inspection in the product assembly process.
Further, even a product in which parts are correctly assembled can be detected suitably because it can detect that the assembly has been loosened due to changes over time or that the parts have been deformed or consumed.

  Here, the configuration including the information processing terminal 500 and the measuring device 600 in addition to the configuration of the second embodiment is taken as an example, but the system is configured by adding the information processing terminal 500 and the measuring device 600 to the configuration of the third embodiment. It is also possible to configure.

  Each of the above embodiments is an example of a preferred embodiment of the present invention, and the present invention is not limited to these, and various modifications are possible.

It is a figure which shows the structure of the components management system which concerns on 1st Embodiment which implemented this invention suitably. It is a figure which shows that the installation position of several components of the same shape can be distinguished by coordinate information. It is a figure which shows that the content of the assembly | attachment operation | work can be grasped | ascertained with the information which shows the relative positional relationship of components. It is a figure which shows that the content of the assembly | attachment operation | work can be grasped | ascertained in detail by the information which shows the relative positional relationship of components, and coordinate information. It is a figure which shows an example which provided the some coordinate system regarding one product. It is a figure which shows the structure of the components management system which concerns on 2nd Embodiment which implemented this invention suitably. It is a figure which shows the structure of CAD and IC tag writer. It is a figure which shows an example of the method of specifying the installation position of components. It is a figure which shows the structure of an IC tag reader. It is a figure which shows an example of the information recorded on an IC tag. It is a figure which shows an example of IC tag information at the time of defining the position of a vertex using a common coordinate system in related components. It is a figure which shows typically the relationship between components. It is a figure which shows the state which highlighted the component of the one which read the IC tag. It is a figure which shows the state which pinpointed the position in space using a division and a layer. It is a figure which shows the structure of the components management system which concerns on 3rd Embodiment which implemented this invention suitably. It is a figure which shows an example of the information accumulate | stored in CAD. It is a figure which shows an example of the operation | movement sequence of the components management system which concerns on 3rd Embodiment. It is a figure which shows the structure of the components management system which concerns on 4th Embodiment which implemented this invention suitably.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Position information generation apparatus 11, 102 IC tag writer 20 Position information display apparatus 21, 201 IC tag reader 50 IC tag 100 Position information writing system 101 CAD
200 position information display system 202 viewer 300, 500 information processing terminal 400 network 600 measuring instrument

Claims (21)

Means for generating position information for specifying an installation position of an article to which an IC tag is attached;
A position information writing apparatus comprising: writing means for recording the position information on the IC tag.   The position information writing apparatus according to claim 1, wherein the position information includes information indicating a relative positional relationship between the article and another article.   3. The position information writing apparatus according to claim 1, wherein the position information includes information for specifying an area including an installation position of the article.   The position information writing apparatus according to claim 1, wherein the position information includes coordinate values in an arbitrary coordinate system. Means for generating related article information that specifies an installation position of another article as a coordinate value in the arbitrary coordinate system;
5. The position information writing apparatus according to claim 4, wherein the writing means writes the related article information together with the position information into the IC tag.   6. The position information writing apparatus according to claim 5, wherein the means for generating the position information is an apparatus for designing an assembly structure including the article and the other article as a component. Means for storing a list of articles as the components and IC tag information to be written in an IC tag attached to each article;
Means for transmitting the list to the requesting external device in response to a request from the external device;
7. The position information writing device according to claim 6, wherein IC tag information relating to an article designated by the external device based on the list is output to the writing means. Position information specifying the installation position of the article as a coordinate value in an arbitrary coordinate system from the IC tag attached to the article, and related articles specifying the installation position of another article as a coordinate value in the arbitrary coordinate system Means for reading out information;
A position information display device comprising: means for displaying a positional relationship between the article and the other article as an image based on the position information and the related article information. Means for generating position information for specifying an installation position of an article to which an IC tag is attached;
A position information writing device comprising: writing means for recording the position information on the IC tag;
An article management system comprising: a reading unit that reads out the position information from an IC tag attached to the article; and a position information display device that includes a unit that displays the position information.   The article management system according to claim 9, wherein the position information includes information indicating a relative positional relationship between the article and another article.   The article management system according to claim 9 or 10, wherein the position information includes information for specifying an area including an installation position of the article.   The article management system according to claim 9, wherein the position information includes coordinate values in an arbitrary coordinate system. Means for generating related article information that specifies an installation position of another article as a coordinate value in the arbitrary coordinate system;
13. The article management system according to claim 12, wherein the writing means writes the related article information together with the position information into the IC tag. The reading means reads the related article information recorded on the IC tag together with the position information,
14. The article management system according to claim 13, wherein a positional relationship between the article and the other article is displayed as an image based on the position information and the related article information.   16. The article management system according to claim 14, wherein the means for generating position information is a device for designing an assembly structure including the article and the other article as a component. The position information writing device comprises:
Means for storing a list of articles as the components and IC tag information to be written in an IC tag attached to each article;
Means for transmitting the list to the requesting external device in response to a request from the external device;
16. The article management system according to claim 15, wherein IC tag information relating to an article designated by the external device based on the list is output to the writing means. The position information display device
Measuring means for measuring the position of the article to which the IC tag is attached;
The article management system according to any one of claims 12 to 16, wherein the position information read from the IC tag is compared with the position of the article measured by the measuring unit. Generating position information for specifying an installation position of an article to which an IC tag is attached, including coordinate values in an arbitrary coordinate system;
Generating related article information that specifies an installation position of another article as a coordinate value in the arbitrary coordinate system;
And a writing step of recording the position information on the IC tag. From the IC tag attached to the article, position information for specifying the installation position of the article including coordinate values in an arbitrary coordinate system and the installation position of another article are specified as coordinate values in the arbitrary coordinate system. A reading process of reading out related article information;
And a step of displaying a positional relationship between the article and the other article as an image based on the position information and the related article information. A measuring step of measuring the position of the article to which the IC tag is attached;
20. The article management method according to claim 19, further comprising a step of comparing the position information read from the IC tag with the position of the article measured by the measuring unit.   21. An article management program that causes a computer to execute the article management method according to claim 18.

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