JP2014058403A - Location management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately associate a management target component with a storage space even if a plurality of IC tags installed in storage spaces are detected.SOLUTION: In the case where an article IC tag and a place IC tag are read out by an IC tag reader in circulating storage spaces 1,2, an inventory management system determines that a management target component A attached with the article IC tag is stored in the storage space 1 or 2 in which the place IC tag is installed. In the case where the IC tag reader reads out a plurality of place IC tags, it is determined that the management target component A is stored in the storage space 1 or 2 in which a place IC tag having a larger overlapped area between a graph of reception intensity and reception elapsed time regarding the article IC tag and a graph of reception intensity and reception elapsed time regarding the place IC tag is installed, so that the management target component A can be accurately associated with the storage space 1 or 2.

Description

  The present invention relates to a location management system. More specifically, the present invention relates to a system that is applied to management of locations such as inventory, parts, and work-in-process using IC tags in factories and warehouses.

It takes time to understand where inventory, parts, work-in-process items, etc. are placed in each storage area in factories and warehouses.
If the parts flow in a uniform manner on the line, you can easily guess the parts in each place, but if there are many parts going in and out with the processing subcontracting, or the processing priority of the parts This is because if it changes often, it will be difficult to grasp what is in each place.

For such a problem, there is a method of storage management using an IC tag (RFID).
For example, in Patent Document 1, the combination of an article tag affixed to an article and a place IC tag affixed to a place can be used for registration of article information, or a rough position can be specified when searching for lost articles Yes.

  That is, in Patent Document 1, as shown in FIG. 10A, a managed article 100, an article RFID tag 300 attached thereto, and a place RFID tag 200 attached to a place where the article is stored (see FIG. 11). Information is registered in the information management database 900 via the portable RFID reader / communication device 800. Therefore, as shown in FIG. 10B, when searching for the management target component 100, information is extracted from the information management database 900 via the RFID reading / communication device 800 and displayed on the reading / communication device screen example 850. Let

  Then, as shown in FIG. 11A, the RFID reading / communication device 800 is moved to collect RFID information that the RFID reading / communication device 800 can communicate with, but the article RFID tag 300 is outside the communicable range. Communication is sometimes impossible, and communication is possible when the location RFID tag 200 is within the communicable range, as shown in FIG.

  However, in order to manage articles according to Patent Document 1, it is necessary to associate and register the article RFID tag 300 and the location RFID tag 200 as shown in FIG. As described above, when the movement of the article occurs frequently, there is a problem that the registration process for associating the article with the place becomes enormous.

  Further, in Patent Document 2, by installing a location management system including an IC tag reader on a hand pallet truck as a transport means, the location of the transport target is managed when an operator transports the transport target. Is possible.

  That is, in Patent Document 2, as shown in FIG. 12, an antenna (IC tag reader) 102 for reading a non-contact type IC tag attached to an object to be conveyed is displayed on the hand pallet truck T, and various information is displayed. The location management system 101 including the display unit 106 is mounted. The IC tag reader 101 can also read a non-contact type IC tag arranged at a storage location where a transport object is stored. By reading both non-contact type IC tags at the same time, Can be associated with each other.

  However, in Patent Document 2, there is a problem that a countermeasure when a plurality of IC tags arranged at the storage location is detected when attempting to store the conveyance target in the storage location is not studied.

JP-A-2005-71193 JP2007-99415A

  The present invention has been made in view of the above-described prior art, and even when a plurality of IC tags installed in a place have been detected, location management that can accurately associate the managed component with the place. To provide a system.

The location management system according to claim 1 of the present invention for solving the above-described problem includes an article IC tag attached to a managed part, a place IC tag installed in a place for storing the managed part, and the article IC An IC tag reader that reads a tag and a place IC tag. When the article IC tag and the place IC tag are read at the same time or at a close time by the IC tag reader when patrol the place, the article IC tag In the location management system for determining that the attached management target parts are stored in the location where the location IC tag is installed, when the plurality of location IC tags are read by the IC tag reader, A graph of the reception intensity and the reception elapsed time concerning the article IC tag, the reception intensity and the reception elapsed time concerning the place IC tag, A location management system that determines that the managed component is stored in the place where the place IC tag having a larger overlap area with the graph is placed, and the article IC tag is read by the IC tag reader When a plurality of the location IC tags are read, when the peak of the received intensity from the component IC tag completely matches any of the received intensity peaks from the plurality of location IC tags, the managed component Is determined to be stored at the central position of the place where the place ID tag is installed.
The location management system according to claim 2 of the present invention for solving the above-mentioned problem is that in the location management system according to claim 1, the IC tag reader simultaneously receives reception signals from the component IC tag and the location IC tag. Features.
The location management system according to claim 3 of the present invention that solves the above problem is the location management system according to claim 1, wherein the location and the number of parts to be managed stored in the location are displayed. A web server implemented as a web system, further comprising a web server accessible on the intranet, and when the web server clicks on the place in the sketch, as part information of the management target part stored in the place, At least the order number, the item number, the drawing name, and the management form ID are displayed.

  According to the present invention, when a plurality of place IC tags are read by the IC tag reader during the patrol, the graph of the reception intensity and the reception elapsed time relating to the article IC tag, the reception intensity and the reception elapsed time relating to the place IC tag, Since it is determined that the managed part is stored in the place where the place IC tag with the larger area overlapped with the graph is installed, even if a plurality of place IC tags are detected, the managed part Can be accurately associated with the place.

It is the top view which shows arrangement | positioning of a storage place, and the graph which shows the relationship of reception intensity-reception elapsed time. It is the top view which shows arrangement | positioning of a storage place, and the graph which shows the relationship of reception intensity-reception elapsed time. FIG. 3A is a front view of the active IC tag, and FIG. 3B is a back view of the active IC tag. FIG. 4A is an explanatory view showing how an operator carries an IC tag reader in a bag, and FIG. 4B is a schematic view of the IC tag reader taken out from the bag. FIG. 5A is a perspective view of a box in which a component unit is accommodated, and FIG. 5B is a front view of a management form attached to the box. It is a reverse view of an IC tag. It is a partial front view of a management form to which two types of barcodes are attached. It is a sketch of a factory showing the location where parts are stored and the stored parts in association with each other. It is a bar graph which shows three-dimensionally the reception intensity and reception time in the parts A and the placements (positions) 1 and 2. FIG. 10A is an explanatory diagram showing a procedure for registering information of a management object, and FIG. 10B is an explanatory diagram showing a procedure for extracting registered information for searching. FIG. 11A is an explanatory diagram showing a case where a management target component is not found within the communicable range, and FIG. 11B is an explanatory diagram showing a case where a management target product is found within the communicable range. FIG. 12 is a schematic view of a pallet truck equipped with a location management system.

  The parts to be managed (hereinafter simply referred to as “parts”), which are objects of the present invention, refer to parts that require location management in factories and warehouses, and include inventory, parts, work-in-process, and the like.

  An IC tag used in the present invention is one of small information chips, and is an alias such as an electronic tag, a wireless tag, a wireless IC tag, an RF tag, an electronic tag, an electronic price tag, and an RFID (Radio frequency identification). There is.

  An IC tag is an IC chip with a huge storage capacity and a small antenna embedded in various shapes such as seal labels, tags, coins, keys, capsules, etc., and the information stored in the IC chip is transmitted by radio waves. It is possible to read with an IC tag reader without directly touching.

  The types of IC tags are classified into a passive type that does not have a battery and obtains power from the radio waves of the IC tag reader and emits radio waves, and an active type that has a battery and emits radio waves by driving the battery.

  The following embodiment is applied to the location management of the cascade of a gas turbine or a steam turbine as an example, but the present invention is not limited to this.

  A location management system according to a first embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the component IC tag and the location IC tag read at the same time or in the near time are associated with each other.

That is, in the present embodiment, when associating a component IC tag and a location IC tag, when a plurality of location IC tags are read, a determination is made using the measured reception intensity-reception elapsed time graph. .
FIG. 1 and FIG. 2 are a plan view showing a plurality of places and a graph of reception intensity-reception elapsed time received by the reader antenna when circulating along the places. The reception intensity is in an ideal state that varies with distance.

The reader / antenna is an antenna attached to the portable IC tag reader and receives a signal from the place IC tag installed in the places 1 and 2 and is attached to the product A stored in the place 1 or 2. A signal from the component IC tag is also received.
As described later, for example, the IC tag shown in FIGS. 3A and 3B can be used.
As described later, for example, the IC tag reader shown in FIGS. 4A and 4B can be used.

In this embodiment, it is assumed that an operator circulates each place with an IC tag reader, reads the component IC tag and the place IC tag, and associates the part with the place.
As shown in FIG. 1, the place 1 and the place 2 are arranged adjacent to each other, and the place IC tag is installed at the center of the place 1 and the place 2, while the part A is stored at a position near the place 1 of the place 2 And

  Since the reception intensity received by the reader / antenna varies depending on the distance between the reader / antenna and the IC tag, for example, as shown by arrows in FIG. Assuming that the vehicle travels with a reader / antenna at a constant speed from 1 to the place 2, first, as the place 1 is approached, the reception intensity of the place IC tag installed in the place 1 gradually increases. It reaches a peak right next to it and gradually decreases as it moves away from Yard 1.

At the same time, the reception intensity of the part A stored in the storage area 2 from the component IC tag gradually increases, reaches a peak right next to the part A, and the reception intensity from the location IC tag of the storage area 2 gradually increases. It reaches a peak right next to and gradually decreases as it moves away from Yard 2.
That is, the reader / antenna receives a total of three radio waves from the place IC tag of the place 1 and the place 2 and the wave from the part IC tag of the part A. It is necessary to judge whether it is stored in either one.

Here, as shown in FIG. 1, the radio wave from the location IC tag and the radio wave from the component IC tag are not received simultaneously. In other words, the peak of the received intensity from the component IC tag of the component A does not completely coincide with any of the received intensity peaks from the place IC tags of the place 1 and the place 2.
However, as shown in FIG. 1, as is clear from the graph of the reception intensity and the reception elapsed time, the reception intensity and the reception elapsed time graph regarding the component IC tag of the component A and the reception intensity and the reception elapsed time regarding the place 2 are clearly shown. The overlap area with the graph is larger than the overlap area between the reception intensity and reception elapsed time graph for the component A tag of the component A and the reception intensity and reception elapsed time graph for the place 1.

For this reason, in this embodiment, it is determined that the part A is stored in the yard 2 where the overlapping area of the reception intensity and the reception elapsed time is large.
That is, in FIG. 1, since the part A is stored at a position near the place 1 of the place 2, the reader antenna does not receive signals from the part IC tag of the part A and the location IC tag of the place 2 at the same time. -From the graph of the elapsed time of reception, it is determined that the part A is stored in the storage area 2.

On the other hand, as shown in FIG. 2, when the component A is stored at the center position of the storage place 2, unlike FIG. 1, the reader antenna receives signals from the component IC tag of the component A and the location IC tag of the storage place 2. Receive at the same time. That is, the reception intensity from the part IC tag of the part A completely matches the reception intensity from the place IC tag of the storage place 2.
Therefore, as shown in FIG. 2, when signals from the component IC tag of the component A and the location IC tag of the place 2 are received simultaneously, it is determined that the part A is stored in the place 2.

  As described above, the location management system according to the present embodiment is configured such that when a plurality of location IC tags are read by the IC tag reader when patrols the parking spaces 1 and 2, the reception intensity and the reception progress related to the product IC tag. Since it is determined that the part A is stored in the place 2 where the place IC tag having the larger overlap area is formed between the graph of time and the graph of the reception intensity and the reception elapsed time related to the place IC tag 10, Even when a plurality of place IC tags are detected, the part A and the place 1 or 2 can be associated with each other accurately, and the time required for registration of the part and place can be greatly reduced.

A location management system according to a second embodiment of the present invention will be described. In the present embodiment, the component IC tag and the location IC tag read at the same time or in the near time are associated with each other.
That is, in this embodiment, the parts of the part IC tag received at the time before and after the place IC tag is received are associated with the placement.
In this embodiment, information on the location IC tag and the component IC tag is registered in advance.

Table 1 shows component IC tag information. The component IC tag information includes an IC tag ID, a tag type, and a component name.
Table 1 shows that the IC tag whose IC tag ID is RFID0003831 is attached to the component 1 as a component IC tag. Similarly, IC tags with IC tag IDs RFID0003738, RFID0003794, and RFID0003173 are attached to the components 2, 3, and 4, respectively, as component IC tags.

Table 2 shows location IC tag information. The place IC tag information includes an IC tag ID, a tag type, and a place name.
Table 2 shows that an IC tag with an IC tag ID of RFID0003985 is installed in the place A as a place IC tag. Similarly, the IC tags with IC tag IDs RFID0003987 and RFID0003986 indicate that they are installed in the locations B and C as place IC tags.
Assuming that the location IC tag information and the component IC tag information shown in Table 1 and Table 2 are registered, the operator goes around each place with an IC tag reader.

Table 3 shows the results of receiving the IC tag that visited each place with a tag reader. The IC tag reception result includes a reception date and time, an IC tag ID, a tag type, and a reception intensity.
As shown in Table 3, component IC tag (IC tag ID = RFID0003831), component IC tag (IC tag ID = RFID0003738), location IC tag (IC tag ID = RFID0003986), component IC tag (IC tag ID = RFID0003794) It can be seen that there were five receptions in the order of the component IC tag (IC tag ID = RFID0003173).
Based on the location IC tag information and component IC tag information shown in Tables 1 and 2 and the IC tag reception result shown in Table 3, the components and locations of the component IC tags received before and after receiving the location IC tag. Associate with.

Table 4 shows the result of associating parts and storage locations. The association result includes a component IC tag ID, a component name, a placement name, and a placement tag ID.
In this embodiment, the component IC tag component 1 (IC tag ID = RFID0003831) and component 2 (IC tag ID = RFID0003738) received at the two reception dates before and after receiving the location IC tag (IC tag ID = RFID0003986). The part 3 (IC tag ID = RFID0003794) and the part 4 (IC tag ID = RFID0003173) are associated with the place C.
That is, as shown in Table 4, all of parts 1, 2, 3, and 4 are registered as being in place C.

In the above embodiment, the four parts of the component IC tag received at the reception date and time at two places before and after receiving the place IC tag are associated with the place, but the present invention is not limited to this. Two parts of the part IC tag received at the reception date and time of the place may be associated with the place.
As described above, the location management system of the present embodiment circulates each place with an IC tag reader, reads the component IC tag and the place IC tag, and receives them at the time before and after receiving the place IC tag. Since the parts of the part IC tag are associated with the place, the time required for the registration process of the association between the part and the place can be greatly reduced.

A location management system according to a third embodiment of the present invention will be described. This embodiment creates and displays a list of IC tags that have been registered but could not be read. The list stores and displays the locations registered during the previous visit.
In this embodiment, information on the location IC tag and the component IC tag is registered in advance.

Table 5 shows component IC tag information. The component IC tag information includes an IC tag ID, a tag type, and a component name.
Table 5 shows that the IC tag whose IC tag ID is RFID0003831 is attached to the component 1 as a component IC tag. Similarly, IC tags with IC tag IDs RFID0003738, RFID0003794, and RFID0003173 are attached to the components 2, 3, and 4, respectively, as component IC tags.

Table 6 shows location IC tag information. The place IC tag information includes an IC tag ID, a tag type, and a place name.
In Table 6, it is shown that the IC tag whose IC tag ID is RFID0003985 is installed in the place A as the place IC tag. Similarly, the IC tags with IC tag IDs RFID0003987 and RFID0003986 indicate that they are installed in the locations B and C as place IC tags.
Assuming that the location IC tag information and the component IC tag information shown in Tables 5 and 6 are registered, the operator patrols each place with an IC tag reader.

Table 7 shows the results of receiving the IC tag that visited each place with a tag reader. The IC tag reception result includes a reception date and time, an IC tag ID, a tag type, and a reception intensity.
As shown in Table 7, there were three receptions in the order of the component IC tag (IC tag ID = RFID0003794), the location IC tag (IC tag ID = RFID0003985), and the component IC tag (IC tag ID = RFID0003173). I understand.
Based on the location IC tag information and component IC tag information shown in Table 5 and Table 6 and the IC tag reception result shown in Table 7, the components received at the time before and after receiving the location IC tag including the previous placement Associating IC tag parts and storage locations.

Table 8 shows the result of associating parts and storage locations. The association result includes a component IC tag ID, a component name, a placement name, a placement tag ID, and a previous placement.
As shown in Table 8, it can be seen that the parts 3 and 4 are in the yard C because they are normally received. On the other hand, component IC tags (IC tag ID = RFID0003831, IC tag ID = RFID0003738) indicating components 1 and 2 were not received for components 1 and 2 due to the influence of radio wave shielding and the like.

In this embodiment, as shown in Table 8, it is possible to estimate the current location by recording the previous location. For example, it is possible to estimate that “parts 1 and 2 have not been received but are still in the previous place C?”.
As described above, the location management system of the present embodiment circulates each place with an IC tag reader, reads the component IC tag and the place IC tag, and receives them at the time before and after receiving the place IC tag. When associating the parts of the component IC tag with the placement, the information on the previous placement is included, so that it is possible to guess the placement of the parts that have missed the IC tag.

A location management system according to a fourth embodiment of the present invention will be described. In this embodiment, for each part, in addition to the location information, information on the next operation is acquired from the production management system and registered / displayed.
In this embodiment, information on the location IC tag and the component IC tag is registered in advance.

Table 9 shows the component IC tag information. The component IC tag information includes an IC tag ID, a tag type, and a component name.
Table 9 shows that the IC tag whose IC tag ID is RFID0003831 is attached to the component 1 as a component IC tag. Similarly, IC tags with IC tag IDs RFID0003738, RFID0003794, and RFID0003173 are attached to the components 2, 3, and 4, respectively, as component IC tags.

Table 10 shows location IC tag information. The place IC tag information includes an IC tag ID, a tag type, and a place name.
Table 10 shows that the IC tag whose IC tag ID is RFID0003985 is installed in the storage site A as the location IC tag. Similarly, the IC tags with IC tag IDs RFID0003987 and RFID0003986 indicate that they are installed in the locations B and C as place IC tags.
Assuming that the location IC tag information and the component IC tag information shown in Table 9 and Table 10 are registered, the operator patrols each place with an IC tag reader.

Table 11 shows the results of receiving the IC tag that visited each place with the tag reader. The IC tag reception result includes a reception date and time, an IC tag ID, a tag type, and a reception intensity.
As shown in Table 11, component IC tag (IC tag ID = RFID0003831), component IC tag (IC tag ID = RFID0003738), location IC tag (IC tag ID = RFID0003987), component IC tag (IC tag ID = RFID0003794) It can be seen that there were five receptions in the order of the component IC tag (IC tag ID = RFID0003173).

Table 12 shows part information of the production management system (database). As shown in Table 12, a part IC tag ID, a part name, and a next operation are registered in the production management system.
As shown in Table 12, the next operation of the component 1 to which the IC tag having the RFID tag ID of RFID0003831 is attached is “cutting”, and similarly, the component 2 to which the IC tags having the IC tag IDs of RFID0003738, RFID0003794, and RFID0003173 are attached. , 3 and 4 are “cutting”, “painting” and “inspection”.
Based on the location IC tag information and component IC tag information shown in Table 9 and Table 10, the IC tag reception result shown in Table 11, and the production management system component information shown in Table 12, the location IC including the next work is included. The parts of the part IC tag received at the time before and after receiving the tag are associated with the place.

Table 13 shows the result of associating parts and storage locations. The association result includes a component IC tag ID, a component name, a placement name, a placement tag ID, and a next operation. Data for the next operation was obtained from the information of the production management system shown in Table 12.
In the present embodiment, since the next work is also included in Table 13, when searching for a part based on the location information, it is possible to guess and search from the information of the next work.
For example, “At the time of visiting each place with a tag reader, the part 4 was certainly in the place B, but at present, the part 4 is not found in the place B. As shown in Table 13, the next work of the part 4 It is possible to infer that “Is it in the inspection area because it is“ inspection ”?”.

  As described above, the location management system of the present embodiment circulates each place with an IC tag reader, reads the component IC tag and the place IC tag, and receives them at the time before and after receiving the place IC tag. When associating the part of the component IC tag with the place, the information on the next work is included. Therefore, when searching for a part based on the location information, it is possible to estimate and search from the information on the next work.

A location management system according to a fifth embodiment of the present invention will be described with reference to FIGS. The present embodiment relates to an apparatus that enables patrol for receiving an IC tag in a factory.
FIG. 3A is a front view of the active IC tag, and FIG. 3B is a rear view thereof. FIG. 4 (a) is an explanatory view showing how the operator B carries the IC tag reader in a bag, and FIG. 4 (b) is a schematic view of the IC tag reader taken out of the bag.

The active IC tag 10 shown in FIG. 3 has a built-in battery (battery life of 1 year), and has the advantage that it can fly radio waves far away by battery driving and has a long communication distance. As the active IC tag 10, it is desirable to use an IC tag having a communication distance of at least 2 m in a metal environment.
As shown in FIG. 3B, the active IC tag 10 is protected by being covered with a plastic bag 15, and a barcode 11 of a tag ID is attached to the back surface.

As shown in FIG. 4, the worker B carries a stationary IC tag reader (IC tag scanner) 12 in a bag. The IC tag reader 12 is connected to the notebook computer 13 and includes a reader antenna 14 and uses a portable battery.
The notebook computer 13 is set so that the screen glows red when the IC tag is received. As a result, it is possible to circulate while confirming normal reception.

  In this embodiment, since an active IC tag with a built-in battery is used, it is possible to prevent reading errors and increase reading accuracy by securing a long communication distance.

  A location management system according to a sixth embodiment of the present invention will be described with reference to FIGS. In this embodiment, a component IC tag is attached to a form that moves together with a component without attaching it to the component itself.

As shown in FIG. 5A, a management form 22 is attached to a box 21 in which a component unit (blade row) 20 is accommodated. The management form 22 is a form that also serves as a parts information table, a work instruction form, and a work completion record (the record is also registered in the database from the on-site computer).
As shown in FIG. 5B, an IC tag 23 is attached to the file of the management form 22.

In addition, it is desirable to write a barcode that can identify the part on the form. In this embodiment, as shown in FIG. 5B, the management form 22 is attached with a barcode 24 indicating the ID of the management form.
Further, as shown in FIG. 6, a barcode 25 indicating the IC tag ID is also attached to the back surface of the IC tag 23.
Therefore, as shown in FIG. 7, both the barcode 24 of the management form 22 and the barcode 25 pasted on the management form 22 are read by the barcode reader, and the parts information is acquired from the production management system and registered in association with each other. can do.
On the screen to be registered, the IC tag ID and the management form ID have different numbers of digits, and the IC tag ID has a rule that the first four digits are fixed. It is possible to automatically identify whether the tag ID has been read or whether the management form ID has been read, and register them in association with each other.

Table 14 shows component IC tag information. The component IC tag information includes an IC tag ID, a tag type, and a component name.
Table 14 shows that the IC tag whose IC tag ID is RFID0003831 is attached to the component 1 as a component IC tag. Similarly, an IC tag with an IC tag ID of RFID0003738 is attached to the component 2, and an IC tag with an IC tag ID of RFID0003794 is attached to the component 3.

Table 15 shows part information of the production management system. As shown in Table 15, the ID and part number of the management form are registered in the production management system.
That is, the management form with the management form ID 90E is part 1, the management form with the management form ID 01E is part 2, the management form with the management form ID 03E is part 3, and the management form ID 24E. It is registered that each management form is attached to each part 4.

Table 16 shows the results of registration registration (so-called association) between IC tags and components.
In Table 14, there is no component IC tag information related to the component 4, but by acquiring the component information from the production management system, if the IC tag ID is RFID0003173 and the management form ID is 24E, the IC of RFID0003173 It can be seen that the tag is attached to the part 4.

  As described above, when managing the location of a part using an IC tag, the relationship between the part and the IC tag must be registered in advance, but in this embodiment, since forms are used, Registration work can be easily performed in a short time.

  In this embodiment, since the forms are used, an outsourced product management form storage area (a management form storage area for parts outside the factory due to reasons such as outsourcing processing) is installed, and parts outside the factory are installed. It is possible to manage that parts are located outside the factory by placing all management forms in the subcontracted goods management form storage area and managing the location using IC tags in the same way as the parts storage area. It becomes.

A seventh embodiment of the present invention is shown in FIG. In the present embodiment, on the floor plan of the factory, the location (place) where the parts are stored and the associated result of the stored parts are displayed.
The association result is updated as needed by the operator once a day with the IC tag reader, and the number of parts in the place is displayed in the place part of the map.

For example, as shown in FIG. 8, a factory floor plan is implemented as a Web system in a Web server accessible via an intranet in the factory so that it can be displayed from a personal computer as a client. The location of the plant in the factory floor plan shows the number of blades in the plant.
For example, in the drawing, the place indicated by a square (shown by a halftone) indicates the number of blade rows (number of sets) stored in the place. Then, when a place is clicked, a list of parts at the place and part information is displayed. For example, the order number, item number, orderer, drawing name, management form ID, and tour date and time are displayed.
For example, in the figure, the outsourced product management form storage area (shown in halftone) indicated by the square outside the factory floor plan is temporarily set to the number of blade rows (location set) outside the factory for reasons such as outsourcing. Number) is displayed. When the outsourced product management form storage area is clicked, a list of parts and parts information in a place other than the factory is temporarily displayed. For example, the order number, item number, orderer, drawing name, management form ID, and tour date and time are displayed.

According to the present embodiment, the following effects can be obtained.
(I) The situation of the whole factory and the movement of the object can be grasped. (Ii) Any person concerned can grasp the situation of the factory immediately.
(Iii) Items in the storage area can be confirmed in a list.

  A location management system according to an eighth embodiment of the present invention will be described with reference to FIG. In the present embodiment, when the parts and the placement cannot be associated one-on-one, the likelihood ranking of the association between the parts and the placement is obtained by the method of the first embodiment or the like.

FIG. 9 is a bar graph that three-dimensionally shows the received intensity and the received time at the part A and the placements (positions) 1 and 2. Some data is missing due to data interference.
As shown in FIG. 9, when there are places 1 and 2 that are close to each other, one part A may be associated with two places 1 and 2.

That is, in FIG. 9, the time when the reception intensity of the component A reaches the maximum intensity does not coincide with the time when the reception intensity of the storage places 1 and 2 reaches the maximum intensity (the reception intensity of the component A becomes the maximum intensity 61 Is 9:15:37, and the receiving strengths of the parking spaces 1 and 2 are the maximum strength 79 and the strength 58, respectively, at 9:15:38 and 9:15:50).
Further, as shown in FIG. 9, although the distribution of the received intensity is different between the locations 1 and 2, it substantially matches the distribution of the received intensity of the component A.
Therefore, the part A and the place 1 or 2 cannot be associated on a one-to-one basis, and the part A may be associated with the two places 1 and 2.

  As described above, in the case where the parts and the place cannot be associated one-on-one, the present embodiment obtains the ranking of the likelihood of the association between the part and the place by the method of the first embodiment or the like.

Table 17 shows the results of using Example 1 as a ranking method (overlap area of parts and placement graphs with time on the horizontal axis and reception intensity on the vertical axis).
As shown in Table 17, for parts 1, 2, and 4, there is one place with a numerical value other than 0, so for parts 1, 2, and 4, the part and place are determined on a one-to-one basis. However, for the part 3, since the numerical value of the placement B is 162, the numerical value of the placement D is 65, and the numerical value of the placement H is 2779, the part and the placement are not determined one-to-one.

Table 18 shows the result of ranking the overlapping areas of the parts and placement graphs according to Example 1 shown in Table 17.
As shown in Table 18, for the part 3, since the first place is ranked as a place H, the second place is a place B, and the third place is a place D, the place H is the most likely place. In this order, the place B and the place D are in this order.
In this embodiment, when a part and a place cannot be associated one-to-one, the likelihood ranking of the association between the part and the place is obtained by the method of Example 1 or the like. You can search by narrowing down.

  The present invention can be widely used for managing the location of inventory, parts, work in progress, and the like. In particular, there is a large amount of material, and movement often occurs, but it is effective in a factory that is sufficient to confirm the location once a day, and location management can be performed very easily compared to other methods.

1, 2 Place 10 Active IC tag 11 Tag ID barcode 12 Stationary IC tag reader 13 Laptop 14 Reader antenna 20 Component unit 21 Box 22 Management form 23 IC tag 24 Bar code indicating management form ID 25 IC tag ID Bar code indicating A Part B Worker

Claims (3)

An article IC tag attached to a managed component;
A location IC tag installed in a storage location for storing the managed parts;
An IC tag reader for reading the article IC tag and the location IC tag,
When the article IC tag and the place IC tag are read at the same time or at a close time by the IC tag reader when visiting the place, the place IC tag is attached to the management target part to which the article IC tag is attached. In the location management system that determines that the storage is stored in the installation site,
When a plurality of the location IC tags are read by the IC tag reader, a graph of the reception intensity and the reception elapsed time related to the article IC tag, and a graph of the reception intensity and the reception elapsed time related to the location IC tag It is a location management system that determines that the managed part is stored in the location where the location IC tag with the larger overlap area is installed,
When the product IC tag is read by the IC tag reader and a plurality of the location IC tags are read, the peak of the reception intensity from the component IC tag is the peak of the reception intensity from the plurality of location IC tags. When the location management system completely matches any of the locations, it is determined that the managed component is stored at a central position of the location where the location ID tag is installed. In the location management system according to claim 1,
A location management system for simultaneously receiving reception signals from the component IC tag and the location IC tag by the IC tag reader. In the location management system according to claim 1,
Further comprising: a web server accessible on an intranet, wherein the parking space, and a floor plan that displays the number of the management target parts stored in the parking space, are implemented as a web system;
When the web server clicks the place in the floor plan, it displays at least an order number, an item number, a drawing name, and a management form ID as part information of the managed part stored in the place. A location management system characterized by