JP7720764B2 - Item management device, program, and item management system - Google Patents

Description

The present invention relates to an item management device, a program, and an item management system.

Conventionally, there is known an item management system that uses wireless authentication technology known as RFID (Radio Frequency IDentification), which acquires information stored in the IC circuit of a radio frequency tag circuit element attached to documents stored in a designated storage location, weighs the documents, determines weight trends based on the results of this weighing, and outputs a display signal corresponding to the results of this determination to a PC (see Patent Document 1).

However, since the amount of anticancer drugs used in anticancer drug therapy often varies depending on the patient's body surface area, a certain amount of residual liquid may be left over after use. Any residual liquid that has passed the expiration date, which is the period from the date of opening until it can be used, must be discarded, and waste of anticancer drugs has become a problem. In order to reduce waste of anticancer drugs, it is necessary to use them multiple times (split use), but manually managing multiple anticancer drugs poses problems such as human error and the time required for management work.
Therefore, it is conceivable to apply the invention described in Patent Document 1 to management.

Japanese Patent Application Laid-Open No. 2009-215025

However, when the invention described in Patent Document 1 is applied to the above-mentioned problems, it is time-consuming because it is a system that weighs and manages items (documents) individually.

The present invention aims to provide an item management device, program, and item management system that can easily manage remaining item quantities.

In order to solve the above problem, the article management device of the invention described in claim 1 comprises:
a first acquisition unit that acquires first item information written in an IC chip of an RFID tag attached to an item placed in a storage unit capable of placing a plurality of items;
a second acquisition unit that acquires the results of measurement by a weighing unit that measures the total weight of all the items placed in the storage unit;
a calculation unit that calculates the remaining amount of the one item based on the first item information written in the IC chip of the one item acquired by the first acquisition unit and the result acquired by the second acquisition unit;
a management unit that generates management information that associates the remaining amount of the one item with first item information of the one item;
a third acquisition unit that acquires product usage information, which is information regarding the type and amount of product used;
an identification unit that identifies the taken-out item based on the first item information acquired by the first acquisition unit;
Equipped with
When the amount of the item used is equal to or greater than the remaining amount of the item identified by the identifying unit as having been taken out, the managing unit deletes information relating to the item identified as having been taken out from the management information .

The invention described in claim 2 is the article management device described in claim 1,
the first acquisition unit acquires the first item information when the one item is put into or taken out of the storage unit;
the second acquisition unit acquires a result of measuring a total weight when the one item is put into or taken out of the storage unit,
The calculation unit calculates the remaining amount of the one item based on the change in weight before and after the one item is taken in and out.

The invention described in claim 3 is the article management device according to claim 1 or 2,
The system further includes a presentation unit that presents an article to be used from among the articles placed in the storage unit based on the article use information and the management information acquired by the third acquisition unit.

The invention described in claim 4 is the article management device described in claim 3,
a fourth acquisition unit that acquires second item information related to the item;
The second product information includes information regarding the expiration date of the product and information regarding the expiration date after opening of the product,
The presenting unit presents the product to be used based on the information regarding the expiration date and the information regarding the expiration date after opening acquired by the fourth acquiring unit.

The invention described in claim 5 is the article management device described in claim 3 or 4,
a notification unit that notifies by any one of an image , sound, light, and vibration;
The device further includes a notification control unit that, when the identification unit identifies that an item different from the item presented by the presentation unit has been taken out, issues a notification using the notification unit.

The invention described in claim 6 is the article management device according to any one of claims 1 to 5,
The article is a pharmaceutical product.

The program according to claim 7 comprises:
Computer,
a first acquisition unit that acquires first item information written in an IC chip of an RFID tag attached to an item placed in a storage unit capable of placing a plurality of items therein;
a second acquisition unit that acquires the weight result obtained by a weighing unit that measures the total weight of all the items placed in the storage unit;
a calculation unit that calculates the remaining amount of the one item based on the first item information written in the IC chip of the one item acquired by the first acquisition unit and the result acquired by the second acquisition unit;
a management unit that generates management information that associates the remaining amount of the one item with first item information of the one item;
a third acquisition unit that acquires product usage information, which is information regarding the type and amount of product used;
an identification unit that identifies the taken-out item based on the first item information acquired by the first acquisition unit;
It functions as
When the amount of the item used is equal to or greater than the remaining amount of the item identified by the identifying unit as having been taken out, the managing unit deletes information relating to the item identified as having been taken out from the management information .

The article management system according to claim 8 comprises:
a weighing unit having a storage unit capable of placing a plurality of articles therein and configured to measure the total weight of all the articles placed in the storage unit;
a first acquisition unit that acquires first item information written in an IC chip of an RFID tag attached to the item placed in the storage unit;
a second acquisition unit that acquires the result of measurement by the measurement unit;
a calculation unit that calculates the remaining amount of the one item based on the first item information written in the IC chip of the one item acquired by the first acquisition unit and the result acquired by the second acquisition unit;
a management unit that generates management information that associates the remaining amount of the one item with first item information of the one item;
a third acquisition unit that acquires product usage information, which is information regarding the type and amount of product used;
an identification unit that identifies the taken-out item based on the first item information acquired by the first acquisition unit;
a sheet antenna having a sheet-like shape provided in the storage section;
The article is placed on the sheet antenna ,
When the amount of the item used is equal to or greater than the remaining amount of the item identified by the identifying unit as having been taken out, the managing unit deletes information relating to the item identified as having been taken out from the management information .

The item management device, program, and item management system of the present invention make it easy to manage remaining quantities of items.

1 is a diagram showing a schematic diagram of an article management system according to an embodiment of the present invention; FIG. 1 is a diagram illustrating an example of a weighing device loaded with an item. 10 is a flowchart showing an article registration process. FIG. 10 is a diagram showing an example of a setting screen of the weighing device. FIG. 10 is a diagram illustrating an example of management information. 10 is a flowchart showing an article management process. 10 is a flowchart showing an article management process according to a first modified example. FIG. 10 is a diagram showing an example of a presentation screen displaying items to be used in Modification Example 1. FIG. 10 is a diagram showing an example of a weighing device according to a second modified example, which includes a plurality of sheet antennas and a weighing unit. FIG. 10 is a diagram showing an example of a weighing device loaded with an article according to Modification 3.

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited to the illustrated examples.

(Item Management System)
An embodiment of the present invention will be described with reference to Figures 1 to 10. First, Figure 1 is a conceptual diagram of an article management system 100 of the present invention.

As shown in FIG. 1, an item management system 100 according to an embodiment of the present invention includes items 10a, 10b, 10c, etc. (hereinafter, when there is no need to distinguish between them, they will be referred to as items 10) equipped with RFID tags 11a, 11b, 11c, etc. (hereinafter, when there is no need to distinguish between them, they will be referred to as RFID tags 11), a weighing device 20, and an item management device 30.
The article 10 is, for example, a pharmaceutical product such as an anti-cancer drug used in anti-cancer drug treatment.

(RFID tag)
The RFID tag 11a will be described. The RFID tags 11b, 11c, etc. have the same configuration as the RFID tag 11a, so their description will be omitted.

The RFID tag 11a is a passive RFID tag that does not incorporate a battery, and as shown in FIG. 1, includes an antenna section 111a and an IC chip 112a.
The antenna unit 111a receives a first radio wave RW1 transmitted from a sheet antenna 22a (described later) provided in the weighing device 20. The antenna unit 111a then converts the received first radio wave RW1 into power and supplies the power to the IC chip 112a.
The IC chip 112a has an internal memory that stores the first item information, and upon receiving the first radio wave RW1, the IC chip 112a controls the antenna unit 111a to radially transmit a second radio wave RW2 containing the first item information. The sheet antenna 22a receives this second radio wave RW2, and the weighing device 20 transmits the received first item information to the item management device 30.
The first item information includes an item ID for identifying the item 10, a product code of the item 10, a manufacturing date, a manufacturing factory code for identifying the factory where the item 10 was manufactured, and the like.

(Measuring device)
The weighing device 20 includes a device main body 21, a storage unit 22 equipped with a sheet antenna 22a that communicates with the RFID tag 11, and a weighing unit 23 that weighs the item 10. The device main body 21, the sheet antenna 22a, and the weighing unit 23 are connected by a communication cable 24. The communication cable 24 is, for example, a coaxial cable.

The device main body 21 reads the first article information from the second radio wave RW2 acquired by the sheet antenna 22a.
The device main body 21 also acquires the weighing result measured by the weighing unit 23 .
1, the device main body 21 also includes a communication unit 211 that communicates with the item management device 30. Communication between the communication unit 211 and the item management device 30 is performed, for example, by USB (Universal Serial Bus) communication. Alternatively, other communication methods may be used for communication between the communication unit 211 and the item management device 30.

FIG. 2 shows an example of a weighing device 20 loaded with an item 10 .
The storage section 22 has a storage space for storing the article 10, and is provided integrally with the weighing section 23. The surface of the storage section 22 on which the article 10 is placed is made up of a sheet antenna 22a.
The sheet antenna 22a is, for example, in the form of a rectangular sheet, and is large enough to allow a plurality of articles 10 to be placed on the sheet antenna 22a.
When the user uses the article 10, the user takes the article 10 placed on the sheet antenna 22a and returns it to the sheet antenna 22a after use.
As shown in Figure 2, the weighing unit 23 is integrally provided below the storage unit 22, and measures the total weight of all items 10 placed on the sheet antenna 22a and outputs the weighing result to the device main body 21.
In the example shown in FIG. 1, the weighing device 20 is shown to have one storage section 22 and one weighing section 23, but the weighing device 20 may be configured to have a plurality of storage sections 22 and a plurality of weighing sections 23.

(Goods management device)
The item management device 30 includes a control unit 31 , a memory unit 32 , a display unit 33 , an operation reception unit 34 , a communication unit 35 , and a notification unit 36 .

The control unit 31 controls the operation of the item management device 30 and is specifically configured with a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), etc., and controls each part of the item management device 30 through cooperation between the CPU and the computer programs stored in the ROM and memory unit 32, which are deployed in the working area of the RAM.

The control unit 31 also acquires the first item information written in the IC chip 112 of the RFID tag 11 attached to the item 10 placed on the sheet antenna 22a from the weighing device 20 via the communication unit 35. Here, the control unit 31 functions as a first acquisition unit.
The control unit 31 also acquires the results of weighing by the weighing unit 23, which weighs the total weight of all the items 10 placed on the sheet antenna 22a, from the weighing device 20 via the communication unit 35. Here, the control unit 31 functions as a second acquisition unit.
The control unit 31 also calculates the remaining amount of the item based on the first item information of the item acquired by the first acquisition unit and the result acquired by the second acquisition unit. Here, the control unit 31 functions as a calculation unit.
The control unit 31 also generates management information that associates the remaining amount of an item with the first item information of the item. Here, the control unit 31 functions as a management unit.
The control unit 31 also acquires second item information related to the item 10 via the communication unit 35. Here, the control unit 31 functions as a fourth acquisition unit.
Furthermore, the control unit 31 identifies the taken-out item 10 based on the first item information acquired by the first acquisition unit. Here, the control unit 31 functions as an identification unit.

The storage unit 32 is configured by, for example, a hard disk drive (HDD), a semiconductor memory, etc., and is a storage unit to which data and programs can be written and read. The storage unit 32 also stores a program 32a and the like.
The programs 32a include various system programs, application programs, and a management application program (hereinafter referred to as a management application) for managing the item 10, which are executed by the control unit 31.

The storage unit 32 also stores management information. Specifically, the storage unit 32 stores the item ID of the RFID tag 11 provided on the item 10 to be managed by the item management system 100. The storage unit 32 also stores, in association with the item ID, first item information, second item information, expiration date after opening, remaining amount, and the like, other than the item ID of the item 10, as management information.
The second item information includes the expiration date of the item 10, the expiration date period (information about the expiration date) which is the period during which the item can be used from the date of manufacture, the expiration date period after opening which is the period during which the item can be used from the date of opening (information about the expiration date after opening), specific gravity, content volume, etc.

The display unit 33 is composed of a display such as an LCD (Liquid Crystal Display). The display unit 33 displays various screens in accordance with the instructions of a display control signal input from the control unit 31.

The operation reception unit 34 includes, for example, a keyboard with character input keys, number input keys, and other keys associated with various functions, a pointing device such as a mouse, etc., and receives operation input from the user and outputs an operation signal corresponding to the operation input to the control unit 31. Note that the operation reception unit 34 may also be a touch panel formed integrally with the display unit 33.

Under the control of the control unit 31, the communication unit 35 communicates data with the weighing device 20 and external devices using a predetermined communication protocol. Specifically, the communication unit 35 is a communication interface that includes a communication integrated circuit (IC) and a communication connector.

Under the control of the control unit 31, the notification unit 36 notifies the user by displaying an image on the display unit 33, using light, sound, vibration, etc.

(Item registration processing)
Next, a description will be given of an item registration process for registering an item 10 to be managed by a management app running in the item management device 30. The control unit 31 of the item management device 30 executes the item registration process shown in Fig. 3 when a predetermined condition is met (for example, when a user issues an instruction to register an item in the management app).

In the item registration process, first, the control unit 31 of the item management device 30 accepts the settings of the weighing device 20 by the user via the operation acceptance unit 34 on the setting screen 331 shown in FIG. 4 (step S1).
For example, in a setting field 332 of a setting screen 331 shown in FIG. 4, the control unit 31 accepts a user's selection of a COM port (COMmunication port), which is a communication port of the communication unit 35 to which the weighing device 20 is connected.
Furthermore, the control unit 31 accepts, in a setting field 333, a user setting of the output level of the first radio wave RW1 output from the sheet antenna 22a of the weighing device 20 connected to the communication unit 35. The output level of the first radio wave RW1 may be set to a level that can be received by the RFID tag 11 of the item 10 placed on the sheet antenna 22a.
Furthermore, if the weighing device 20 is equipped with multiple sheet antennas 22a, the control unit 31 accepts a user selection in the setting field 334 as to which sheet antenna 22a the items 10 on which are to be managed.
Furthermore, when the user presses the "Cancel" button 335, the control unit 31 closes the setting screen 331.
Furthermore, when the user presses the "Next" button 336, the control unit 31 shifts the process to step S2.

Next, the control unit 31 acquires the first item information of the item 10 placed on the sheet antenna 22a from the sheet antenna 22a selected in the setting field 334 of the setting screen 331 in step S1 (step S2).
An example of management information is shown in Fig. 5. In the example shown in Fig. 5, the item ID, product code, manufacturing date, and manufacturing factory code of items 10a, 10b, and 10c are acquired as first item information. It is assumed that items 10a and 10b have already been registered in the management information and are in use, and item 10c is to be newly registered in the management information.

Next, the control unit 31 acquires second product information of the newly registered product 10 (step S3). Specifically, the control unit 31 acquires information on the expiration date of the product 10 from an external device or the like via the communication unit 35 based on the product code of the product 10, and calculates the expiration date based on the expiration date information and the manufacturing date acquired in step S2.
5, the expiration date of the product 10c is one year. Therefore, the control unit 31 calculates the expiration date of the product 10c as September 1, 2022, which is one year after the manufacturing date of September 1, 2021.
In addition, based on the product code of the item 10, the control unit 31 obtains information on the expiration date after opening, which is the period during which the item 10 can be used from the date of opening, the specific gravity, and the content volume from an external device or the like via the communication unit 35.
5, the expiration period after opening of the articles 10a, 10b, and 10c is one month, the content volume is 50 ml, and the specific gravity of the articles 10a and 10b is 1.020 g/ml, and the specific gravity of the article 10c is 1.040 g/ml.
In addition, the second item information of the item 10 may be stored in advance in the storage unit 32, and the control unit 31 may acquire the second item information of the item 10 from the storage unit 32.

Next, the control unit 31 associates the first item information, second item information, and remaining amount of the item 10 other than the item ID with the item ID of the newly registered item 10 and stores them as management information in the storage unit 32 (step S4). As shown in Figure 5, the remaining amount of the newly registered item 10c is 50 ml, which is the content volume, because it has not yet been used.

(Item management processing)
Next, a description will be given of an item management process for managing the managed items 10 by a management app running in the item management device 30. The control unit 31 of the item management device 30 executes the item management process shown in Fig. 6 when a predetermined condition is met (for example, when a user issues an instruction to manage items in the management app).

In the item management process, first, the control unit 31 of the item management device 30 accepts the settings of the weighing device 20 (step S11), in the same manner as step S1 of the above-described item registration process.
Next, the control unit 31 controls the weighing unit 23 to measure the total weight of all items 10 placed on the sheet antenna 22a selected in the setting field 334 of the setting screen 331 in step S11 (step S12).

Next, the control unit 31 again weighs the total weight of all items 10 placed on the sheet antenna 22a, compares the weighing result with the total weight measured in step S12, and determines whether the total weight has changed (step S13).
If the user, such as a doctor or nurse, has not yet taken out the item 10 and the total weight has not changed (step S13; NO), the control unit 31 returns the process to step S13.

When a user such as a doctor or nurse takes out an item 10 and the total weight changes (step S13; YES), the control unit 31 obtains an item ID from the first item information of the item 10 placed on the sheet antenna 22a from the sheet antenna 22a (step S14).
Next, the control unit 31 refers to the management information stored in the memory unit 32 and identifies the item 10 with the item ID registered in the management information that could not be obtained in step S14 as the item 10 that was taken out (step S15).

Next, the control unit 31 determines whether this is the first time the item 10 has been used (step S16). Specifically, the control unit 31 references the management information stored in the memory unit 32 and determines that an item 10 for which an expiration date after opening is stored, such as items 10a and 10b shown in FIG. 5, is not the first time it has been used, and determines that an item 10 for which an expiration date after opening is not stored, such as item 10c, is the first time it has been used.

If the removed item 10 is being used for the first time (step S16; YES), the control unit 31 sets the time when the item ID was acquired in step S14 as the time when the item 10 was removed. Then, the control unit 31 refers to the management information, acquires information on the expiration period after opening of the removed item 10, calculates the expiration period after opening based on the time when the item was removed and the information on the expiration period after opening, and stores the calculated expiration period as management information (step S17).
In the example shown in Figure 5, the expiration date after opening for items 10a, 10b, and 10c is one month. Therefore, if item 10a is first taken out on October 1, 2021, the control unit 31 calculates the expiration date after opening to be November 1, 2021, one month after the expiration date after opening from October 1, 2021. Furthermore, if item 10b is first taken out on November 1, 2021, the control unit 31 calculates the expiration date after opening to be December 1, 2021, one month after the expiration date after opening from November 1, 2021.

Next, the control unit 31 obtains an item ID from the first item information of the item 10 placed on the sheet antenna 22a from the sheet antenna 22a, and determines whether the item ID of the item 10 identified as having been taken out in step S15 has been obtained, that is, whether the item 10 identified as having been taken out has been returned to the sheet antenna 22a (step S18).
If the item 10 identified as having been taken out has not been returned (step S18; NO), the control unit 31 returns the process to step S18.

Furthermore, if an item 10 identified as having been removed is returned (step S18; YES), the control unit 31 controls the weighing unit 23 to weigh the total weight of all items 10 placed on the sheet antenna 22a. The weighing result is then compared with the total weight measured in step S13 to calculate the amount of used items 10. The remaining amount of each item 10 is calculated based on the amount used, and the remaining amount is stored as management information (step S19). Specifically, for example, if the item 10 identified as having been removed is item 10a, and the total weight measured in step S13 is 138.7 g (item 10a: 35 ml, 35.7 g + item 10b: 50 ml, 51 g + item 10c: 50 ml, 52 g), and the total weight measured in step S19 is 123.4 g, the used weight of item 10a is calculated to be 138.7 g - 123.4 g = 15.3 g. The control unit 31 then obtains the specific gravity of item 10a from the management information, and calculates that the used volume of item 10a is 15 ml based on that specific gravity (1.020 g/ml in the example shown in Figure 5) and the used weight of item 10a, 15.3 g. The control unit 31 then subtracts the used volume of item 10a, 15 ml, from the remaining amount of item 10a stored in the management information (35 ml in the example shown in Figure 5), and stores the result, 20 ml, as the new remaining amount.

Next, the control unit 31 determines whether the management application has been terminated by the user (step S20).
If the management application has not been terminated (step S20; NO), the control unit 31 waits for a predetermined time (step S21) and proceeds to step S12. The predetermined time may be set to a time that allows the management information to be updated accurately, such as a few seconds. In other words, the management information is updated until the management application is terminated.
If the management application is terminated (step S20; YES), the control unit 31 terminates this process.

Also, if the item 10 being taken out is not being used for the first time (step S16; NO), the control unit 31 transitions the process to step S18.

Furthermore, the control unit 31 may constantly display management information on the display unit 33 while executing the item management process, or may display management information on the display unit 33 when it receives an instruction to display management information from the user via the operation reception unit 34.

Furthermore, although the management information stores the capacity as the content volume and remaining amount of the item 10, this is not limited to this. The weight may also be stored as the content volume and remaining amount of the item 10.

(Variation 1)
Next, a first modification of the above embodiment will be described.
The following description will focus on the differences from the above embodiment. The configuration of the item management system 100 of this modified example is the same as the configuration of the item management system 100 of the above embodiment.
In this modification, when a user uses the product 10, the user takes the product 10 placed on the sheet antenna 22a and, if there is any liquid remaining after use, returns the product 10 to the sheet antenna 22a. If there is no liquid remaining after use, the user discards the empty container of the product 10.

In this modification, the control unit 31 acquires product usage information, which is information about the type and amount of product used, via the operation reception unit 34 or the communication unit 35. Here, the control unit 31 functions as a third acquisition unit.
Furthermore, the control unit 31 presents the item 10 to be used from among the items 10 placed in the storage unit 22 based on the item use information and management information acquired by the third acquisition unit by displaying it on the display unit 33. Here, the control unit 31 functions as a presenting unit.
Furthermore, when the identification unit identifies that an item 10 different from the item 10 presented by the presentation unit has been taken out, the control unit 31 issues an alert via the notification unit 36. Here, the control unit 31 functions as an alert control unit.
FIG. 7 shows a flowchart of the goods management process of this modified example.

In the goods management process of this modification, the control unit 31 executes steps S11a and S12a similar to steps S11 and S12 of the goods management process of the above embodiment.
Next, the control unit 31 determines whether or not product usage information has been acquired (step S13a). The product usage information is information regarding the type and amount of product 10 used.
The item usage information may be input by a user such as a doctor or nurse via the operation reception unit 34, or may be obtained by determining the information based on the patient's physique, age, and stage of cancer recorded in the patient's medical record obtained from an external device, etc.
If the item usage information has not been acquired (step S13a; NO), the control unit 31 returns the process to step S13a.

When the item use information is acquired (step S13a; YES), the control unit 31 presents the item 10 to be used by displaying it on the display unit 33 (step S14a). Specifically, the control unit 31 first refers to the management information stored in the memory unit 32.
If the product usage information acquired in step S13a is "15 ml of product 10 with product code "110" was used," the control unit 31 sets the usage priority for products 10a and 10b with product code "110" shown in Fig. 5 in order of shortest expiration date after opening. That is, in the example shown in Fig. 5, the control unit 31 sets product 10a as the first usage priority and product 10b as the second usage priority.
8 shows an example of a presentation screen 337 that displays the item 10 to be used. In the example shown in Fig. 8, the item ID of the item 10 is displayed in association with the usage priority, product code, expiration date, content volume, expiration date after opening, and remaining amount. Note that the information displayed on the presentation screen 337 only needs to display at least the item ID and usage priority of the item 10, and it can be set as desired whether or not other information is displayed.
Furthermore, if multiple items 10 with the same expiration date after opening are registered in the management information, the control unit 31 sets the usage priority in order of the shortest expiration date.

Next, the control unit 31 executes steps S15a to S17a similar to steps S13 to S15 of the goods management process of the above embodiment.
Next, the control unit 31 determines whether the item 10 identified as having been taken out in step S17a is the item 10 with the highest usage priority that was presented as the item to be used in step S14a (step S18a).
If a user such as a doctor or nurse mistakenly takes out an item 10 other than the item 10 with the highest usage priority, and the item 10 identified as having been taken out is not the item 10 with the highest usage priority (step S18a; NO), the control unit 31 controls the alarm unit 36 to alert the user by displaying an image, light, sound, vibration, etc. on the display unit 33 (step S19a).
Next, the control unit 31 determines whether or not an input of an instruction to cancel the alert has been received from a user such as a doctor or nurse via the operation receiving unit 34 (step S20a).
If an instruction to cancel the alert has not been input (step S20a; NO), the control unit 31 returns the process to step S20a.

Furthermore, if a user such as a doctor or nurse realizes the error due to the notification in step S19a, returns the item 10 that was mistakenly taken out, takes out the item 10 with the highest usage priority presented in step S14a, and inputs a command to cancel the alert (step S20a; YES), the control unit 31 transitions the process to step S16a.

Furthermore, if a user such as a doctor or nurse takes out an item 10 with the highest usage priority, and the item 10 identified as having been taken out is the item 10 with the highest usage priority (step S18a; YES), the control unit 31 determines whether the item 10 will be used up in this use (step S21a).
If the item 10 is not used up, for example, in the example shown in Figure 5, if the item 10a is used in an amount less than 35 ml (step S21a; NO), the control unit 31 executes steps S22a to S27a, which are similar to steps S16 to S21 of the item management processing in the above embodiment.

Also, when the product 10 is used up, for example, in the example shown in Figure 5, when 35 ml of product 10a is used (step S21a; YES), the control unit 31 deletes information about product 10a from the management information (step S28a).
Next, the control unit 31 displays on the display unit 33 that an item 10 of the same type as the item 10a removed in step S28a will be replenished on the sheet antenna 22a (step S29a), and the process proceeds to step S26a.
In step S29a, the control unit 31 may have a function of referring to inventory information of the item 10 stored in an external device, etc., and ordering the item 10 if the type of item 10 instructed to be replenished is not in stock.
Furthermore, if a new item 10 is added to the sheet antenna 22a after step S29a is executed, the control unit 31 may execute steps S2 to S4 of the item registration process for the new item 10.

(Variation 2)
Next, a second modification of the above embodiment will be described.
The following description will focus on the differences from the above embodiment.
In the item management system 100 of this modified example, the weighing device 20 includes a plurality of storage sections 22 and a weighing section 23. The other configurations are the same as those of the item management system 100 of the above embodiment.

FIG. 9 shows an example in which a weighing device 20 includes a plurality of storage sections 22 and a weighing section 23 .
In the example shown in Figure 9, the weighing device 20 has a storage section 22A and a weighing section 23A connected to the device main body 21 by a communication cable 24A, and further has a storage section 22B and a weighing section 23B connected to the device main body 21 by a communication cable 24B.

In this modification, the control unit 31 stores management information for each storage unit 22 in the storage unit 32 .
In addition, when the user mistakenly returns an item 10 that is registered in the management information as an item 10 to be placed in storage section 22B to storage section 22A while the item management process is being performed, control section 31 displays on display section 33 that the return location is incorrect and controls notification section 36 to issue an alert.
This helps prevent users from choosing the wrong return location.

(Variation 3)
Next, a third modification of the above embodiment will be described.
The following description will focus on the differences from the above embodiment.
In the item management system 100 of this modified example, the storage section 22 is provided with a partition 22b that allows the items 10 to be placed one by one on the weighing device 20, as shown in FIG.
The other configurations are the same as those of the item management system 100 of the above embodiment.

The dividers 22b are provided with labels on each of the compartments formed by the dividers 22b, the labels carrying information that can identify the articles 10 (for example, an article ID).
In each of the compartments, an article 10 corresponding to the information written on the label is placed.
This allows the information that identifies the item 10 to be easily recognized, and also prevents the item 10 from being returned to the wrong place.

(effect)
The item management device 30 provided in the item management system 100 described above in the above embodiment includes a first acquisition unit (control unit 31) that acquires first item information written to the IC chip 112 of the RFID tag 11 attached to an item 10 placed in a storage unit 22 that can hold multiple items, a second acquisition unit (control unit 31) that acquires the results of weighing by a weighing unit 23 that weighs the total weight of all items 10 placed in the storage unit 22, a calculation unit (control unit 31) that calculates the remaining amount of an item based on the first item information written to the IC chip 112 of an item 10 acquired by the first acquisition unit and the results acquired by the second acquisition unit, and a management unit (control unit 31) that generates management information that associates the remaining amount of an item 10 with the first item information of the item.
Therefore, the amount of usage can be calculated based on the change in the total weight of all items 10 in the storage section 22 at the time the first item information is obtained, so there is no need to individually weigh the weight of the items 10 used, and the remaining amount of items can be easily managed.

Furthermore, in the item management device 30 provided in the item management system 100 described in the above embodiment, the first acquisition unit acquires first item information when an item 10 is taken in or out of the storage unit 22, the second acquisition unit acquires the result of measuring the total weight when an item 10 is taken in or out of the storage unit 22, and the calculation unit calculates the remaining amount of the item based on the change in weight before and after the item 10 is taken in or out.
Therefore, the remaining amount of the article 10 before and after the insertion and removal can be calculated.

In addition, the item management device 30 provided in the item management system 100 described in the above embodiment is provided with a third acquisition unit (control unit 31) that acquires item usage information, which is information regarding the type and usage amount of the item 10 to be used, and a presentation unit (control unit 31) that presents the item 10 to be used from among the items 10 placed in the storage unit 22 based on the item usage information and management information acquired by the third acquisition unit.
Therefore, it is possible to present an appropriate product 10 based on the product usage information.

In addition, the item management device 30 provided in the item management system 100 described in the above embodiment has a fourth acquisition unit (control unit 31) that acquires second item information regarding the item 10, and the second item information includes information regarding the expiration date of the item 10 and information regarding the expiration date after opening of the item 10, and the presentation unit presents the item 10 to be used based on the information regarding the expiration date and the information regarding the expiration date after opening acquired by the fourth acquisition unit.
Therefore, it is possible to present the product 10 with a short expiration date after opening or a short expiration date so that it can be used preferentially.

In addition, the item management device 30 provided in the item management system 100 described in the above embodiment includes an identification unit (control unit 31) that identifies the item 10 that has been taken out based on the first item information acquired by the first acquisition unit, an alarm unit 36 that issues an alarm using either an image, sound, light, or vibration, and an alarm control unit (control unit 31) that issues an alarm using the alarm unit 36 when the identification unit identifies that an item 10 different from the item 10 presented by the presentation unit has been taken out.
Therefore, it is possible to prevent the user from taking out an item 10 different from the item 10 that was presented to them.

Furthermore, in the article management device 30 provided in the article management system 100 described in the above embodiment, the article 10 is a medicine.
Therefore, it is possible to easily manage the remaining amount of anticancer drugs and the like, which are subject to disposal losses.

In addition, the item management system 100 described in the above embodiment has a storage section 22 in which multiple items 10 can be placed, and is equipped with a weighing section 23 that weighs the total weight of all items 10 placed in the storage section 22, a first acquisition section (control section 31) that acquires first item information written to the IC chip 112 of the RFID tag 11 attached to the item 10 placed in the storage section 22, a second acquisition section (control section 31) that acquires the results of weighing by the weighing section 23, a calculation section (control section 31) that calculates the remaining amount of an item based on the first item information written to the IC chip 112 of an item 10 acquired by the first acquisition section and the results acquired by the second acquisition section, a management section (control section 31) that generates management information that corresponds the remaining amount of an item 10 with the first item information of the item 10, and a sheet antenna 22a in a sheet-like shape provided in the storage section 22, and an item 10 is placed on the sheet antenna 22a.
Therefore, the weighing device 20 can easily read the information written in the IC chip 112 of the item 10 .

It goes without saying that the present invention is not limited to the above-described embodiments, and can be modified as appropriate without departing from the spirit of the present invention.

For example, in step S2 of the item registration process in the above embodiment, the control unit 31 of the item management device 30 acquires the first item information of the RFID tag 11 equipped on the item 10 to be managed from the sheet antenna 22a, but this is not limited to this. The first item information may be acquired by a user's input via the operation reception unit 34.
Furthermore, although the first item information is the product code, manufacturing date, and manufacturing factory code of the item 10, it is not limited to this and may be other information related to the item 10.
Furthermore, the second product information is the expiration date, expiration period, expiration period after opening, specific gravity, and content volume of the product 10, but is not limited to this. Other information related to the product 10 may also be used.

The item management system 100 may also include a control device that controls one or more item management devices 30. The item management devices 30 transmit management information for the items 10 to the control device via the communication unit 35. The control device displays the management information received from each item management device 30 on a display unit included in the control device.
This allows the management information of the items 10 managed by multiple item management devices 30 to be recognized collectively.

Furthermore, while the above embodiment describes the case where the item 10 is a pharmaceutical product, this is not limited to this. Specifically, it may be any item whose weight changes due to use, such as food contained in a container or a substance such as powdered metal.

In addition, in the above embodiment, the sheet antenna 22a of the weighing device 20 is sheet-shaped, and the item 10 can be placed on the sheet antenna 22a, but this is not limited to this. The shape of the sheet antenna 22a may be other than sheet-shaped, and if the item 10 cannot be placed on the sheet antenna 22a, the item 10 can be placed within a predetermined distance from the sheet antenna 22a. The predetermined distance can be any distance that allows the first radio wave RW1 and the second radio wave RW2 to be transmitted and received between the item 10 and the sheet antenna 22a.

In addition, in the above embodiment, the item 10 is registered in the management information by performing the item registration process, but this is not limited to this. The item 10 may also be registered in advance in another external device in the management information together with items managed by other item management devices 30.

Furthermore, in step S18 of the item management processing in the above embodiment, the control unit 31 determines whether the item 10 identified as having been taken out has been returned to the sheet antenna 22a. Furthermore, if the item 10 is not returned by a predetermined time (for example, one hour after it was taken out), the control unit 31 may be configured to notify the administrator of the item management system 100 that the item 10 has not been returned.

The RFID tag 11 attached to the item 10 is affixed to the item 10 by the hospital that performs anti-cancer drug treatment, a pharmaceutical wholesaler that distributes the item 10 to the hospital, or a pharmaceutical company that manufactures the item 10. Also, a label affixed to the item 10 may also serve as the RFID tag 11.

100 Item management system 10 Item 11, 11a to 11c RFID tag 111a to 111c Antenna unit 112a to 112c IC chip 20 Weighing device 21 Device main body 211 Communication unit 22 Storage unit 22a Sheet antenna 22b Partition 23 Weighing unit 24 Communication cable 30 Item management device 31 Control unit (first acquisition unit, second acquisition unit, third acquisition unit, fourth acquisition unit, management unit, calculation unit, presentation unit, identification unit, notification control unit, computer)
32 Storage unit 32a Program 33 Display unit 34 Operation reception unit 35 Communication unit 36 Notification unit

Claims (8)

a first acquisition unit that acquires first item information written in an IC chip of an RFID tag attached to an item placed in a storage unit capable of placing a plurality of items;
a second acquisition unit that acquires the results of measurement by a weighing unit that measures the total weight of all the items placed in the storage unit;
a calculation unit that calculates the remaining amount of the one item based on the first item information written in the IC chip of the one item acquired by the first acquisition unit and the result acquired by the second acquisition unit;
a management unit that generates management information that associates the remaining amount of the one item with first item information of the one item;
a third acquisition unit that acquires product usage information, which is information regarding the type and amount of product used;
an identification unit that identifies the taken-out item based on the first item information acquired by the first acquisition unit;
Equipped with
An item management device in which the management unit deletes information regarding an item identified as having been taken out from the management information when the amount of the item used is greater than or equal to the remaining amount of the item identified as having been taken out by the identification unit . the first acquisition unit acquires the first item information when the one item is put into or taken out of the storage unit;
the second acquisition unit acquires a result of measuring a total weight when the one item is put into or taken out of the storage unit,
The article management device according to claim 1 , wherein the calculation unit calculates the remaining amount of the one article based on a change in weight before and after the one article is taken in and out. The item management device according to claim 1 or 2, further comprising a presentation unit that presents items to be used from among the items placed in the storage unit based on the item usage information and the management information acquired by the third acquisition unit. a fourth acquisition unit that acquires second item information related to the item;
The second product information includes information regarding the expiration date of the product and information regarding the expiration date after opening of the product,
The product management device according to claim 3 , wherein the presenting unit presents the product to be used based on the information regarding the expiration date and the information regarding the expiration date after opening acquired by the fourth acquiring unit. a notification unit that notifies by any one of an image , sound, light, and vibration;
The item management device according to claim 3 or 4, further comprising an alarm control unit that issues an alarm via the alarm unit when the identification unit identifies that an item other than the item presented by the presentation unit has been taken out. An item management device according to any one of claims 1 to 5, wherein the item is a pharmaceutical product. Computer,
a first acquisition unit that acquires first item information written in an IC chip of an RFID tag attached to an item placed in a storage unit capable of placing a plurality of items therein;
a second acquisition unit that acquires the weight result obtained by a weighing unit that measures the total weight of all the items placed in the storage unit;
a calculation unit that calculates the remaining amount of the one item based on the first item information written in the IC chip of the one item acquired by the first acquisition unit and the result acquired by the second acquisition unit;
a management unit that generates management information that associates the remaining amount of the one item with first item information of the one item;
a third acquisition unit that acquires product usage information, which is information regarding the type and amount of product used;
an identification unit that identifies the taken-out item based on the first item information acquired by the first acquisition unit;
It functions as
The management unit is a program that deletes information regarding the item identified as having been taken out from the management information when the amount of the item used is equal to or greater than the remaining amount of the item identified as having been taken out by the identification unit . a weighing unit having a storage unit capable of placing a plurality of articles therein and configured to measure the total weight of all the articles placed in the storage unit;
a first acquisition unit that acquires first item information written in an IC chip of an RFID tag attached to the item placed in the storage unit;
a second acquisition unit that acquires the result of measurement by the measurement unit;
a calculation unit that calculates the remaining amount of the one item based on the first item information written in the IC chip of the one item acquired by the first acquisition unit and the result acquired by the second acquisition unit;
a management unit that generates management information that associates the remaining amount of the one item with first item information of the one item;
a third acquisition unit that acquires product usage information, which is information regarding the type and amount of product used;
an identification unit that identifies the taken-out item based on the first item information acquired by the first acquisition unit;
a sheet antenna having a sheet-like shape provided in the storage section;
The article is placed on the sheet antenna ,
An item management system in which the management unit deletes information regarding an item identified as having been taken out from the management information if the amount of the item used is greater than or equal to the remaining amount of the item identified as having been taken out by the identification unit.