JP2018043838A - State discrimination system and state discrimination method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically discriminate the status of a drawer.SOLUTION: A first transmission part 101 is installed in a drawer fitted to a cabinet body so as to be drawn and transmits a first radio wave. A receiving part 103 is installed on the cabinet body so as to receive the first radio wave in a housed state in which the drawer is housed in the cabinet body and so as not to receive the first radio wave in a non-housed state in which the drawer is not housed in the cabinet body. The discrimination part 104 discriminates that the drawer is in a housed state when the first radio wave is received by the receiving part 103, and discriminates that the drawer is in a non-housed state when the first radio wave is not received by the receiving part 103.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a state determination system and a state determination method.

  Currently, various techniques for managing articles to be managed using RFID (Radio Frequency IDentification) tags are known. For example, Patent Document 1 discloses a technology in which an IC tag is attached to an article to be managed, and an antenna installed in a cabinet that stores the article reads information on the article from the IC tag.

  In the technique disclosed in Patent Document 1, the first coupling coil installed in the drawer (movable storage section) and the second coupling coil installed in the cabinet body (furniture body) are electromagnetically coupled, thereby providing an antenna. It becomes possible to read the information.

JP 2006-69731 A

  By the way, it is not preferable from the viewpoint of safety and stability that the state where the drawer is pulled out from the cabinet body continues for a long time. For this reason, when the state where the drawer is pulled out is maintained, it is preferable to encourage the user to store the drawer in the cabinet body. Here, in order to automatically detect that the state in which the drawer is pulled out is maintained, it is necessary to automatically determine the state of the drawer. However, the technique disclosed in Patent Document 1 cannot automatically determine the state of the drawer. For this reason, a technique for automatically determining the state of the drawer is desired.

  The present invention has been made in view of the above problems, and an object thereof is to provide a state determination system that automatically determines the state of a drawer.

In order to achieve the above object, a state determination system according to the first aspect of the present invention provides:
A first wireless tag that is installed in a drawer provided so as to be capable of being pulled out with respect to the cabinet body, and that transmits a first radio wave;
The first radio wave is received when the drawer is stored in the cabinet body, and the first radio wave is received when the drawer is not stored in the cabinet body. An antenna installed in the cabinet body so as not to
When the first radio wave is received by the antenna, it is determined that the drawer is in the stored state, and when the first radio wave is not received by the antenna, it is determined that the drawer is in the non-stored state. Determining means.

The first radio wave includes first identification information for identifying the drawer,
A second wireless tag that is installed in the article and transmits a second radio wave including second identification information for identifying the article;
The antenna receives the first radio wave and the second radio wave when the drawer houses the article and is in the stowed state, and when the drawer houses the article and is not in the stowed state Installed in the cabinet body so as not to receive the first radio wave and the second radio wave,
The determining means determines that the article is stored in the cabinet body when the second radio wave is received by the antenna, and the article is not received by the antenna when the second radio wave is not received. You may discriminate | determine that it is not accommodated in the said cabinet main body.

A plurality of the drawers are provided for the cabinet body,
Each of the plurality of drawers is provided with the first wireless tag;
The time when the first drawer of the plurality of drawers changed from the non-stored state to the stored state, and the state where the article was not stored in the cabinet body changed to the state stored in the cabinet body. Storage means for storing the first identification information corresponding to the first drawer and the second identification information in association with each other when the time difference from the time is equal to or less than a first time threshold value. Further, it may be provided.

The cabinet body is provided with a lock for making the drawer locked or unlocked by a key,
The first wireless tag is a passive tag that transmits the first radio wave in response to receiving a radio wave for power supply;
A reader that transmits the electric power supply radio wave from the antenna and causes the antenna to receive the first radio wave;
When the drawer is in the unlocked state, the reader transmits the power supply radio wave from the antenna, and when the drawer is in the locked state, the reader transmits the power supply radio wave from the antenna. And a control means for preventing transmission.

  When the drawer is in the non-storage state for a second time threshold or more, it may further comprise an informing means for informing that the drawer has been forgotten to be closed.

The antenna includes a first sheet-like conductor having an opening and a second sheet-like conductor, and radio waves propagating inside the antenna are leached out of the opening to cause the first sheet-like conductor. It is a sheet-like antenna that forms a leaching region in the vicinity of a conductor,
The antenna is installed on a side wall having a wall surface orthogonal to a direction in which the drawer is pulled out of the side walls constituting the cabinet body so that the spreading direction of the antenna is parallel to the wall surface,
The first wireless tag is disposed inside the leaching area when the drawer is in the storage state, and is disposed outside the leaching area when the drawer is in the non-storage state. It may be installed in the drawer.

  When the drawer is in the stored state, the first radio wave from the first wireless tag toward the antenna is not blocked, and when the drawer is in the non-stored state, the first wireless tag You may further provide the conductor board which interrupts | blocks the said 1st electromagnetic wave which goes to an antenna.

In order to achieve the above object, a state determination method according to the second aspect of the present invention includes:
A first wireless tag that transmits a first radio wave is installed in a drawer that can be pulled out from the cabinet body,
The first radio wave is received when the drawer is stored in the cabinet body, and the first radio wave is received when the drawer is not stored in the cabinet body. Do not install an antenna on the cabinet body,
When the first radio wave is received by the antenna, it is determined that the drawer is in the stored state, and when the first radio wave is not received by the antenna, it is determined that the drawer is in the non-stored state. To do.

  According to the present invention, it is possible to automatically determine the state of the drawer.

Configuration diagram of a state determination system according to an embodiment of the present invention The block diagram of the processing apparatus which concerns on embodiment of this invention Configuration diagram of a management server according to an embodiment of the present invention Top view of antenna Sectional drawing in the AA line of FIG. Perspective view of cabinet Cabinet side view Functional configuration diagram of a state determination system according to an embodiment of the present invention The flowchart which shows the article | item management process which the processing apparatus which concerns on embodiment of this invention performs. Diagram showing drawer management information The figure which shows article management information Diagram showing correspondence information It is a figure for demonstrating operation | movement of the cabinet which concerns on the modification 1, (A) is a side view of the cabinet when a drawer | drawing-out is in a storage state, (B) is a cabinet when a drawer | drawer is in a non-storage state. Side view It is a figure for demonstrating operation | movement of the cabinet which concerns on the modification 2, (A) is a side view of the cabinet in a locked state, (B) is a side view of a cabinet in an unlocked state

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

(Embodiment)
FIG. 1 is a configuration diagram of a state determination system 1000 according to an embodiment of the present invention. The configuration of the cabinet 400 shown in FIG. 1 is shown in detail in FIGS. The state determination system 1000 is a system for determining the state of the drawers 410, 420, 430, 440, and 450 included in the cabinet 400. The drawers 410, 420, 430, 440, and 450 are in a state in which they are stored in the cabinet body 401 (hereinafter referred to as “storage state”), and in a state in which they are pulled out from the cabinet body 401 and are not stored in the cabinet body 401 (Hereinafter referred to as “non-storage state”). In the present embodiment, the description common to the drawers 410, 420, 430, 440, and 450 will be described using the drawer 410 as an example.

  The state determination system 1000 is a system for determining the state of the articles 510 and 520 stored in the cabinet 400 (the drawers 410, 420, 430, 440, and 450 included in the cabinet 400). As the states of the articles 510 and 520, there are a state in which they are stored in the cabinet 400 (hereinafter referred to as “storage state”) and a state in which they are not stored in the cabinet 400 (hereinafter referred to as “non-storage state”). The state determination system 1000 also determines which of the drawers 410, 420, 430, 440, and 450 is stored when the articles 510 and 520 are stored. That is, the state determination system 1000 is also a system for determining the location of the articles 510 and 520. Therefore, the state determination system 1000 is also an article management system that manages the articles 510 and 520, and is also an article management support system for an administrator to manage the articles 510 and 520. In the present embodiment, the description common to the articles 510 and 520 will be described using the article 510 as an example.

  As shown in FIGS. 1, 6, 7, and the like, the state determination system 1000 includes a processing device 100, a management server 200, a reading device 300, an antenna 310, and first wireless tags 411, 421, 431, 441, 451 and second wireless tags 511, 521. The processing device 100 and the management server 200 are connected to each other via a communication network 600. The antenna 310 is installed in the cabinet body 401. The first wireless tags 411, 421, 431, 441, 451 are installed in the drawers 410, 420, 430, 440, 450, respectively. The second wireless tags 511 and 521 are installed on the articles 510 and 520, respectively. The articles 510 and 520 are assumed to be stored in the drawers 410 and 420, respectively.

  The processing device 100 executes an article management process based on the information received from the reading device 300. The article management process is a process of determining the location of the articles 510 and 520 and clearly indicating the locations of the articles 510 and 520. The processing device 100 executes the article management process while referring to various types of information stored in the management server 200 connected to the processing device 100 via the communication network 600. The processing device 100 is a terminal device such as a notebook computer, a tablet terminal, or a smartphone. Hereinafter, the configuration of the processing apparatus 100 will be described with reference to FIG.

  As shown in FIG. 2, the processing device 100 includes a CPU (Central Processing Unit) 11, a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, a flash memory 14, an RTC (Real Time Clock) 15, a touch screen. 16, a first communication interface 17 and a second communication interface 18. The components included in the processing apparatus 100 are connected to each other via a bus.

  The CPU 11 controls the overall operation of the processing apparatus 100. The CPU 11 operates according to a program stored in the ROM 12 and uses the RAM 13 as a work area. The ROM 12 stores programs and data for controlling the overall operation of the processing apparatus 100. The RAM 13 functions as a work area for the CPU 11. That is, the CPU 11 temporarily writes programs and data in the RAM 13 and refers to these programs and data as appropriate.

  The flash memory 14 is a nonvolatile memory that stores various types of information. The RTC 15 is a time measuring device. The RTC 15 incorporates a battery, for example, and keeps timing while the processing apparatus 100 is powered off. The RTC 15 includes an oscillation circuit including a crystal oscillator, for example. The touch screen 16 detects a touch operation performed by the user and supplies a signal indicating the detection result to the CPU 11. The touch screen 16 displays an image based on the image signal supplied from the CPU 11. As described above, the touch screen 16 functions as a user interface of the processing apparatus 100.

  The first communication interface 17 is an interface for connecting the processing device 100 to the communication network 600. The processing device 100 communicates with the management server 200 connected to the communication network 600 via the communication network 600. The first communication interface 17 includes, for example, a LAN (Local Area Network) interface (for example, a NIC (Network Interface Card)).

  The second communication interface 18 is an interface for connecting the processing device 100 to the reading device 300. The second communication interface 18 is connected to the reading device 300 via a communication cable (not shown). The second communication interface 18 may include a LAN interface, or may include an interface compliant with USB (Universal Serial Bus) or RS-232 (Recommended Standard 232).

  The management server 200 is a server that provides various types of information and services to the processing apparatus 100 via the communication network 600. The management server 200 is, for example, a desktop personal computer or a workstation. Hereinafter, the configuration of the management server 200 will be described with reference to FIG.

  As shown in FIG. 3, the management server 200 includes a CPU 21, ROM 22, RAM 23, hard disk 24, RTC 25, and first communication interface 27. The components included in the management server 200 are connected to each other via a bus.

  The CPU 21 controls the overall operation of the management server 200. The CPU 21 operates in accordance with a program stored in the ROM 22 and uses the RAM 23 as a work area. The ROM 22 stores programs and data for controlling the overall operation of the management server 200. The RAM 23 functions as a work area for the CPU 21. That is, the CPU 21 temporarily writes programs and data in the RAM 23 and refers to these programs and data as appropriate.

  The hard disk 24 is a non-volatile storage device that stores various types of information. The RTC 25 is a time measuring device. The RTC 25 incorporates a battery, for example, and keeps timing while the power of the management server 200 is off. The RTC 25 includes an oscillation circuit including a crystal oscillator, for example. The first communication interface 27 is an interface for connecting the management server 200 to the communication network 600. The management server 200 communicates with the processing device 100 connected to the communication network 600 via the communication network 600. The first communication interface 27 includes, for example, a LAN interface (for example, NIC).

  The reading device 300 is a device that reads tag information from the first wireless tags 411, 421, 431, 441, and 451 and the second wireless tags 511 and 521 under the control of the processing device 100. The reading device 300 is connected to the second communication interface 18 included in the processing device 100 via a communication cable (not shown). The reading device 300 is connected to the antenna 310 via the communication cable 330.

  When the reading device 300 receives information instructing reading of tag information from the processing device 100, the reading device 300 supplies power to the first wireless tags 411, 421, 431, 441, and 451 and the second wireless tags 511 and 521. An electric signal corresponding to a radio wave (hereinafter referred to as “power supply radio wave” as appropriate) is supplied to the antenna 310. The reading device 300 generates a near field in the vicinity of the antenna 310 by transmitting an electric signal corresponding to the power supply radio wave to the antenna 310. When the antenna 310 receives a radio wave including tag information (hereinafter referred to as “tag information-containing radio wave” as appropriate), the reading device 300 receives an electrical signal corresponding to the tag information-containing radio wave from the antenna 310. The reading device 300 transmits tag information indicated by the received electrical signal to the processing device 100. As described above, the reading device 300 reads the tag information via the near field generated in the vicinity of the antenna 310. The power supply radio wave and the tag information-containing radio wave are, for example, radio waves in the UHF band (for example, radio waves having a frequency of about 920 MHz and a wavelength of about 30 cm).

  The antenna 310 radiates electric power supply radio waves according to control by the reader 300, and includes tag information received from the first wireless tags 411, 421, 431, 441, 451 and the second wireless tags 511, 521. An electric signal corresponding to the radio wave is supplied to the reading device 300. Specifically, the antenna 310 radiates a power supply radio wave corresponding to the electrical signal received from the reading device 300. The antenna 310 includes tag information radiated in response to reception of power supply radio waves by the first wireless tags 411, 421, 431, 441, and 451 and the second wireless tags 511 and 521. Receive radio waves. The antenna 310 transmits an electrical signal corresponding to the tag information-containing radio wave to the reading device 300.

  The antenna 310 is preferably an antenna that can communicate with all communication targets (first wireless tags 411, 421, 431, 441, 451, and second wireless tags 511, 521). The antenna 310 is preferably an antenna whose communication performance greatly depends on the distance to the communication target (first wireless tags 411, 421, 431, 441, 451, second wireless tags 511, 521). It is. Specifically, the antenna 310 can communicate with the communication target when the distance to the communication target is relatively short, and cannot communicate with the communication target when the distance to the communication target is relatively long. Is preferred. The antenna 310 is, for example, a sheet-like antenna and is also called a communication sheet. The antenna 310 has a very high radio field intensity in the vicinity of the antenna 310, while the radio field intensity at a place away from the antenna 310 is very low.

  In the present embodiment, when the reception strength (RSSI: Received Signal Strength Indicator) by the antenna 310 is equal to or greater than a threshold, it is referred to as “received radio waves” or “can receive radio waves”, and the reception strength is less than the threshold. In some cases, “does not receive radio waves” or “cannot receive radio waves”. In the present embodiment, the antenna 310 can receive radio waves when the wireless tag is in the leaching area 316 described later, and the antenna 310 cannot receive radio waves when the wireless tag is outside the brewing area 316. And

  The configuration of the antenna 310 will be described with reference to FIGS. 4 and 5. FIG. 4 is a plan view of the antenna 310. FIG. 5 is a cross-sectional view taken along the line AA in FIG. As shown in FIG. 4, the antenna 310 has a sheet-like conductor 311 in which mesh-shaped openings are formed on one surface in the thickness direction. Further, as shown in FIG. 5, the antenna 310 has a sheet-like conductor 312 disposed on the other surface in the thickness direction so as to face the sheet-like conductor 311, and has two layers of sheet-like conductors 311, 311, A dielectric 313 is provided between 312. A protective sheet 314 such as vinyl chloride is attached to the upper surface of the sheet-like conductor 311 in case water is spilled. Similarly, a protective sheet 315 such as vinyl chloride is attached to the lower surface of the sheet-like conductor 312.

  In this embodiment, the shape of the opening is an equilateral triangle. The antenna 310 having such a mesh pattern has a very high radio wave intensity in the vicinity of the antenna 310, while the radio wave intensity at a location away from the antenna 310 is very low. For this reason, the antenna 310 is suitable for communicating with a communication partner having a relatively low antenna sensitivity. That is, the antenna 310 is suitable for reading an RFID tag. In the present embodiment, the antenna 310 is sufficiently longer in length in the longitudinal direction (for example, 100 cm) than in length in the width direction (for example, 10 cm).

  The sheet-like conductor 311 includes, for example, a plurality of equilateral triangles by a plurality of first linear conductors, a plurality of second linear conductors, and a plurality of third linear conductors intersecting each other. This is a layer in which a perforation is formed. The first linear conductor, the second linear conductor, and the third linear conductor are arranged on the same plane and intersect each other at an angle of 60 degrees. In the present embodiment, the length of one side of the equilateral triangle is 7 mm.

  Each of the sheet-like conductor 311 and the sheet-like conductor 312 is made of, for example, an aluminum laminate having a thickness of about 32 μm. The dielectric 313 is made of, for example, a foamed polyolefin having a thickness of about 2 mm. Note that the sheet-like conductor 311 and the sheet-like conductor 312 are not limited to aluminum laminate, and may be formed of a metal foil such as copper, silver, or nickel, plating, vapor deposition, or printing. The dielectric 313 is not limited to foamed polyolefin, and may be made of polyester, polyamide, aromatic polyamide, or the like. Further, air may be used between the sheet-like conductors 311 and 312 without using the dielectric 313.

  The protective sheet 314 is a layer made of an insulator. The protective sheet 314 has a function of suppressing the surface of the sheet-like conductor 311 from being damaged or the surface of the sheet-like conductor 311 from coming into contact with an external conductor. The protective sheet 315 is a layer made of an insulator. The protective sheet 315 has a function of suppressing the surface of the sheet-like conductor 312 from being damaged or the surface of the sheet-like conductor 312 from coming into contact with an external conductor. The protective sheet 314 and the protective sheet 315 are made of, for example, PET (polyethylene terephthalate).

  The antenna 310 has a radio wave interface 320 for supplying radio waves (electrical signals) to the antenna 310 at one end in the longitudinal direction. The radio wave interface 320 is connected to the reading device 300 by a communication cable 330. The antenna 310 has a radio wave absorber 340 for absorbing radio waves at the other end in the longitudinal direction.

  The radio wave interface 320 includes a conductor layer 321, a conductor layer 322, an insulator layer 323, an electrode 324, an electrode 325, and a connector 326. The conductor layer 321 is a layer formed on one surface of the insulator layer 323, and is a layer composed of a conductor. The conductor layer 322 is a layer formed on the other surface of the insulator layer 323, and is a layer made of a conductor. The insulator layer 323 is a layer sandwiched between the conductor layer 321 and the conductor layer 322, and is a layer composed of an insulator.

  The electrode 324 is a flat electrode arranged so as to straddle the conductor layer 321 and the protective sheet 314. The electrode 325 is a flat electrode arranged so as to straddle the conductor layer 322 and the protective sheet 315. The connector 326 is a connector that is provided on one surface of the conductor layer 321 and into which the communication cable 330 is inserted. The connector 326 is configured by a conductor.

  The communication cable 330 is a coaxial cable including an inner conductor 331, an insulator (not shown), an outer conductor 332, and a protective film (not shown). The internal conductor 331 is a conductor to which a signal potential is applied, and is composed of, for example, a copper wire. The insulator (not shown) is an insulator for insulating the inner conductor 331 and the outer conductor 332, and is made of, for example, polyethylene. The external conductor 332 is a conductor to which a ground potential is applied, and is composed of, for example, a meshed copper wire. The protective coating (not shown) is an insulator for protecting the inside of the communication cable 330 and is made of, for example, vinyl resin.

  Communication cable 330 is inserted into connector 326. The internal conductor 331 is connected to the conductor layer 322 through a through-hole provided in the substrate constituted by the conductor layer 321, the conductor layer 322, and the insulator layer 323. On the other hand, the external conductor 332 is connected to the connector 326. Therefore, the inner conductor 331, the conductor layer 322, and the electrode 325 are electrically connected, and the outer conductor 332, the connector 326, the conductor layer 321, and the electrode 324 are electrically connected. That is, a signal potential is applied to the electrode 325 and a ground potential is applied to the electrode 324. A radio wave (electric signal) supplied between the electrode 325 and the electrode 324 propagates through the antenna 310.

  The radio wave absorber 340 absorbs the supplied radio wave. The radio wave absorber 340 suppresses the radio wave propagated through the antenna 310 from being reflected by the other end of the antenna 310. The radio wave absorber 340 includes a radio wave absorber 341 and a conductor plate 342. The radio wave absorber 341 absorbs the supplied radio wave and converts it into heat energy. The conductor plate 342 is a plate-like conductor having a U-shaped cross section.

  When an electric signal is supplied from the reading device 300 to the antenna 310, a radio wave corresponding to the electric signal is transmitted through the antenna 310. A near field is generated when radio waves transmitted through the antenna 310 are leached from the surface of the antenna 310. More specifically, the radio wave corresponding to the electric signal supplied from the reading device 300 to the antenna 310 is in the dielectric 313 between the two layers of sheet-like conductors 311 and 312, and is connected to the radio wave absorber from the connector 326. Transmit up to 340. Then, radio waves transmitted through the dielectric 313 are leached from the mesh-shaped openings formed in the sheet-like conductor 311, so that a leaching region 316 in the vicinity of the sheet-like conductor 311 (shown by a broken line in FIG. 5). Leak (leaching) into the area. This leached radio wave (evanescent wave) is not propagated far away and forms a near field in the leaching region 316 very close to the sheet-like conductor 311.

  The amount of radio waves leached from the surface of the sheet-like conductor 311, that is, the size of the leaching region 316 mainly depends on the interval between meshes formed on the sheet-like conductor 311, the relative dielectric constant of the dielectric 313, and the dielectric 313. It depends on the thickness. Note that the radio wave transmitted through the dielectric 313 is not leached from the sheet-like conductor 312 side because no hole is formed on the surface of the antenna 310 on the sheet-like conductor 312 side and is shielded.

  The cabinet 400 is a shelf for storing the articles 510 and 520. As shown in FIG. 6, the cabinet 400 includes a cabinet body 401 and drawers 410, 420, 430, 440, and 450.

  The cabinet body 401 has a box shape having an opening in the side portion, and houses the drawers 410, 420, 430, 440, and 450. As illustrated in FIG. 7, the cabinet body 401 includes, for example, three side walls 402, a ceiling plate 403, and a floor plate 404.

  The drawers 410, 420, 430, 440, and 450 are drawers provided so as to be able to be pulled out from the cabinet body 401. The drawers 410, 420, 430, 440, and 450 have a box shape with an opening in the upper portion, and store the articles 510 and 520. The drawers 410, 420, 430, 440, and 450 have casters (not shown) and are movable in a predetermined direction on guide rails (not shown) provided in the cabinet body 401. As shown in FIG. 6, the drawer 410 includes a handle 412, the drawer 420 includes a handle (not shown), the drawer 430 includes a handle 432, the drawer 440 includes a handle 442, and the drawer 450 includes a handle 452. .

  The first wireless tags 411, 421, 431, 441, and 451 store tag information and radiate tag information-containing radio waves including tag information when receiving power supply radio waves. That is, the first wireless tags 411, 421, 431, 441, and 451 are passive tags and RFID (Radio Frequency IDentification) tags. The first wireless tags 411, 421, 431, 441, 451 are installed in the drawers 410, 420, 430, 440, 450, respectively. Tag information stored in the first wireless tags 411, 421, 431, 441, 451 is first identification information.

  The first identification information is information for identifying the drawers 410, 420, 430, 440, and 450, and is information indicating a character string composed of numerical values and alphabets, for example. The first identification information stored in the first wireless tag 411 installed in the drawer 410 is information for identifying the drawer 410. The first identification information stored in the first wireless tag 421 installed in the drawer 420 is information for identifying the drawer 420. The first identification information stored in the first wireless tag 431 installed in the drawer 430 is information for identifying the drawer 430. The first identification information stored in the first wireless tag 441 installed in the drawer 440 is information for identifying the drawer 440. The first identification information stored in the first wireless tag 451 installed in the drawer 450 is information for identifying the drawer 450.

  The articles 510 and 520 are articles to be managed, and are articles stored in the cabinet 400 (drawers 410, 420, 430, 440, and 450). The articles 510 and 520 are articles that are targets for determination as to whether or not the articles are stored in the cabinet 400 and which of the drawers 410, 420, 430, 440, and 450 are stored. The articles 510 and 520 are, for example, file cases.

  The second wireless tags 511 and 521 store tag information and, when receiving power supply radio waves, emit tag information-containing radio waves including tag information. That is, the second wireless tags 511 and 521 are passive tags and are RFID tags. The second wireless tags 511 and 521 are installed on the articles 510 and 520, respectively. Tag information stored in the second wireless tags 511 and 521 is second identification information.

  The second identification information is information for identifying the articles 510 and 520, for example, information indicating a character string composed of numerical values and alphabets. The second identification information stored in the second wireless tag 511 installed on the article 510 is information for identifying the article 510. The second identification information stored in the second wireless tag 521 installed on the article 520 is information for identifying the article 520.

  The communication network 600 is a network constructed outside the house, and is a network for devices connected to the communication network 600 to communicate with each other. The communication network 600 is, for example, a WAN (Wide Area Network). The communication network 600 is, for example, the Internet.

  Next, the arrangement of the antenna 310, the arrangement of the first wireless tags 411, 421, 431, 441, and 451 and the arrangement of the second wireless tags 511 and 521 will be described with reference to FIG. FIG. 7 is a side view of the cabinet 400 as viewed from the Z-axis direction. The X-axis direction is a direction in which the drawers 410, 420, 430, 440, and 450 are pulled out (hereinafter referred to as “front-rear direction” as appropriate). The Y-axis direction is a vertical direction (hereinafter, referred to as “vertical direction” as appropriate). The Z-axis is a direction orthogonal to the X-axis and the Y-axis (hereinafter referred to as “left-right direction” as appropriate).

  First, as shown in FIG. 7, the drawers 410, 420, 430, 440, and 450 are stored in order from the top in a space surrounded by the three side walls 402, the ceiling plate 403, and the floor plate 404. For easy understanding, FIG. 7 shows only the middle side wall 402 of the three side walls 402 and does not show the two side walls 402 on both sides. The middle side wall 402 is a side wall having a wall surface orthogonal to the front-rear direction. The two side walls 402 on both sides are side walls having wall surfaces orthogonal to the left-right direction.

  Here, of the two wall surfaces of the middle side wall 402, the wall surfaces closer to the drawers 410, 420, 430, 440, and 450 (the wall surface inside the cabinet 400 and having the larger X-axis coordinate), Drawers 410, 420, 430, 440, 450 are provided with an antenna 310 so that radio waves are radiated in a certain direction. The antenna 310 is fixed to the middle side wall 402 by, for example, a double-sided tape. According to such a configuration, a region near the antenna 310 among the regions inside the cabinet 400 becomes the leaching region 316.

  The leaching area 316 includes, among the first wireless tags 411, 421, 431, 441, 451, the one in which the drawer where the wireless tag is installed is housed, and the first wireless tags 411, 421, 431, Of the 441 and 451, the drawer in which the drawer is installed is adjusted so as not to be included inside. In the example shown in FIG. 6, the drawer 410 is in a non-contained state, and the drawers 420, 430, 440, and 450 are in a accommodated state. Therefore, the leaching region 316 is adjusted so that the first wireless tag 411 is not included therein and the first wireless tags 421, 431, 441, 451 are included therein.

  Further, the leaching area 316 includes inside the second wireless tags 511 and 521, in which the drawer for storing the article on which it is installed is in the housed state, and among the second wireless tags 511 and 521, It is adjusted so that an article in which the article is installed is not stored in the drawer or a drawer in which the article in which the article is installed is not stored is not included. In the example illustrated in FIG. 7, the drawer 410 that stores the article 510 in which the second wireless tag 511 is installed is in the non-storage state, and the drawer 420 that stores the article 520 in which the second wireless tag 521 is installed is stored. State. Accordingly, the leaching area 316 is adjusted so that the second wireless tag 511 is not included therein and the second wireless tag 521 is included therein. Note that the size of the leaching region 316, that is, the length of the leaching region 316 in the X-axis direction is adjusted by the strength of the radio wave, the material of the antenna 310, and the like.

  As described above, the article 510 is provided with the second wireless tag 511, and the article 520 is provided with the second wireless tag 521. The second wireless tag 511 may be installed in any part of the article 510, but it is desirable to install it at the end of the article 510 as much as possible. Further, the article 510 is arranged such that the portion where the second wireless tag 511 is installed is as far back as possible from the drawer 410 (the coordinate in the X-axis direction of the portion where the second wireless tag 511 is installed is as small as possible. As such, it is preferably housed in the drawer 410.

  For example, it is assumed that the article 510 is stored in the drawer 410 such that the shape of the article 510 is a rectangular parallelepiped, the thickness direction of the article 510 is the Y-axis direction, and the longitudinal direction of the article 510 is the X-axis direction. In this case, it is preferable that the wireless tag 511 is installed on one of the two surfaces orthogonal to the longitudinal direction of the item 510 or in the vicinity of the six surfaces of the item 510. is there. In this case, it is preferable that the article 510 is stored in the drawer 410 so that the surface on which the wireless tag 521 is installed (or the surface closer to the wireless tag 511 among the two surfaces) approaches the antenna 310. is there.

  Similarly, it is desirable that the second wireless tag 521 be installed at the end of the article 520 as much as possible. In addition, the article 520 is such that the portion where the second wireless tag 521 is installed is as far back as possible from the drawer 420 (the coordinate in the X-axis direction of the portion where the second wireless tag 521 is installed is as small as possible. As such, it is preferably housed in the drawer 420. According to such a configuration, the size of the leaching region 316 can be reduced, and improvement in the accuracy of determining the state of the drawers 410, 420, 430, 440, 450 and the accuracy of determining the state of the articles 510, 520 can be expected. .

  Next, basic functions of the state determination system 1000 will be described with reference to FIG. Functionally, the state determination system 1000 has a first transmission unit 101, a second transmission unit 102, a reception unit 103, a determination unit 104, a control unit 105, a storage unit 106, and a reception unit 107. And an output unit 108.

  The first transmitter 101 is installed in drawers 410, 420, 430, 440, 450 provided so as to be capable of being pulled out with respect to the cabinet body 401, and a first transmitter 101 for identifying the drawers 410, 420, 430, 440, 450 is used. A first radio wave including one piece of identification information is transmitted. The function of the 1st transmission part 101 is implement | achieved by the function of the 1st radio | wireless tag 411,421,431,441,451, for example.

  The second transmitter 102 is installed in the articles 510 and 520 and transmits a second radio wave including second identification information for identifying the articles 510 and 520. The function of the second transmitter 102 is realized by the function of the second wireless tags 511 and 521, for example.

  The reception unit 103 receives the first radio wave transmitted from the first transmission unit 101 and the second radio wave transmitted from the second transmission unit 102. The receiving unit 103 is installed in the cabinet body 401. The receiving unit 103 receives the first radio wave when the drawer in which the first transmitting unit 101 is installed is in the stored state, and when the drawer in which the first transmitting unit 101 is installed is in the non-stored state It is installed so as not to receive the first radio wave. The receiving unit 103 receives the second radio wave when the drawer storing the article on which the second transmitting unit 102 is installed is in the storage state, and stores the article on which the second transmitting unit 102 is installed. When the drawer to be stored is in the non-contained state, or when the article in which the second transmitter 102 is installed is not stored in the drawer, it is installed so as not to receive the second radio wave. The function of the receiving unit 103 is realized by the function of the antenna 310, for example.

  The determination unit 104 determines that the drawer is in the storage state when the first radio wave is received by the reception unit 103, and determines that the drawer is in the non-storage state when the reception unit 103 does not receive the first radio wave. Determine. The determination unit 104 determines that the article is stored in the cabinet 400 when the reception unit 103 receives the second radio wave, and the reception unit 103 receives the second radio wave when the second radio wave is not received. Is not housed in the cabinet 400. The function of the determination unit 104 is realized by the function of the CPU 11, for example.

  The control unit 105 updates various types of information stored in the storage unit 106 or controls output by the output unit 108 based on the determination result by the determination unit 104 and the operation information received from the reception unit 107. The function of the control unit 105 is realized by the function of the CPU 11, for example.

  The storage unit 106 stores various types of information. The storage unit 106 stores, for example, drawer management information, article management information, and correspondence information described later. The function of the storage unit 106 is realized by the function of the hard disk 24, for example.

  The receiving unit 107 receives various types of information from the user. For example, the reception unit 107 receives an inquiry about the location of an article. The function of the reception part 107 is implement | achieved by the function of the touch screen 16, for example.

  The output unit 108 outputs various information according to control by the control unit 105. For example, the output unit 108 outputs a determination result by the determination unit 104 or outputs information indicating the location of the article. The function of the output unit 108 is realized by the function of the first communication interface 17 or the function of the touch screen 16, for example.

  Next, the article management process executed by the processing apparatus 100 will be described with reference to FIG. The article management process is executed in response to, for example, the processing apparatus 100 being powered on.

  First, the CPU 11 acquires the current time (step S101). For example, the CPU 11 can acquire the current time based on the time information supplied from the RTC 15. When completing the process of step S101, the CPU 11 determines whether or not the current time is the reading time (step S102). The reading time is, for example, a time that arrives every predetermined period (for example, 1 second). When determining that the current time is not the reading time (step S102: NO), the CPU 11 returns the process to step S101.

  On the other hand, when determining that the current time is the reading time (step S102: YES), the CPU 11 reads the tag information (step S103). For example, the CPU 11 controls the reading device 300 so that a power supply radio wave is transmitted from the antenna 310 via the second communication interface 18. Then, the CPU 11 acquires the tag information included in the tag information-containing radio wave received by the antenna 310 from the reading device 300 via the second communication interface 18. The tag information is first identification information or second identification information.

  When completing the process of step S103, the CPU 11 determines whether there is a drawer whose state has changed (step S104). For example, the CPU 11 determines whether there is a drawer whose state has changed, based on the tag information read in step S103 and the drawer management information stored in the hard disk 24.

  Here, the drawer management information will be described with reference to FIG. The drawer management information is information for managing drawers. The drawer management information is, for example, information that associates the first identification information, the latest state, and the state change time. The first identification information is information for identifying which of the drawers 410, 420, 430, 440, and 450. Here, it is assumed that the drawers 410, 420, 430, 440, and 450 are identified by first identification information of A1, A2, A3, A4, and A5, respectively. The latest state is the latest state of the drawer, and is either a non-storage state or a storage state. The state change time is the time when it is first detected that the state has changed to the latest state.

  In FIG. 10, the drawer 410 maintains the non-storage state after changing from the storage state to the non-storage state at t11, and the drawer 420 maintains the storage state after changing from the non-storage state to the storage state at t12. The storage state is maintained after the change from the non-storage state to the storage state at t13, the drawer 440 maintains the storage state after the change from the non-storage state to the storage state at t14, and the drawer 450 is stored from the non-storage state at t15. It is shown that the storage state is maintained after changing to the state.

  The CPU 11 determines whether there is a drawer in which the current state indicated by the drawer management information is different from the latest state obtained from the tag information read in step S103. For example, if A1 is read as the first identification information in step S103, it is determined that the state of the drawer 410 has changed. On the other hand, for example, if A1 is not read as the first identification information in step S103, it is determined that the state of the drawer 410 has not changed. Similarly, the CPU 11 determines whether or not the state of the drawers 420, 430, 440, and 450 has changed. If the CPU 11 determines that there is a drawer whose state has changed (step S104: YES), it updates the drawer management information (step S105).

  For example, it is assumed that the current time acquired in step S101 is t16, and A1 is read as the first identification information in step S103. In this case, the CPU 11 updates the record whose first identification information is A1 to include the storage state as the latest state and include t16 as the state change time. In addition, it is assumed that the current time acquired in step S101 is t16, and A2 is not read as the first identification information in step S103. In this case, the CPU 11 does not update the record whose first identification information is A2.

  When it is determined that there is no drawer whose state has changed (step S104: NO), or when the process of step S105 is completed, the CPU 11 determines whether there is an article whose state has changed (step S106). For example, the CPU 11 determines whether there is an article whose state has changed based on the tag information read in step S103 and the article management information stored in the hard disk 24.

  Here, the article management information will be described with reference to FIG. The article management information is information for managing articles. The article management information is, for example, information that associates the second identification information, the latest state, and the state change time. The second identification information is information for identifying which of the articles 510 and 520 is. Here, it is assumed that the article 510, the article 520, and the article (not shown) are identified by the second identification information B1, B2, and B3, respectively. The latest state is the latest state of the article, and is either the storage state or the non-storage state. The housed state is a state of being housed in the cabinet 400. The non-stored state is a state where the cabinet 400 is not stored. The state change time is the time when it is first detected that the state has changed to the latest state.

  In FIG. 11, the article 510 maintains the non-contained state after changing from the stored state to the non-contained state at t11, and the article 520 maintains the stored state after changing from the non-contained state to the stored state at t12. It is shown that the article maintained the non-contained state after changing from the stored state to the non-contained state at t23.

  The CPU 11 determines whether there is an article in which the latest state indicated by the article management information is different from the current state obtained from the tag information read in step S103. For example, if B1 is read as the second identification information in step S103, it is determined that the state of the article 510 has changed. On the other hand, for example, if B1 is not read as the second identification information in step S103, it is determined that the state of the article 510 has not changed. Similarly, the CPU 11 determines whether or not the state of the article 520 and the article (not shown) (the article indicated by B3) have changed. When it is determined that there is an article whose state has changed (step S106: YES), the CPU 11 updates the article management information (step S107).

  For example, it is assumed that the current time acquired in step S101 is t16, and B1 is read as the second identification information in step S103. In this case, the CPU 11 updates the record in which the second identification information is B1 so that the storage state is included as the latest state and t16 is included as the state change time. In addition, it is assumed that the current time acquired in step S101 is t16, and B2 is not read as the second identification information in step S103. In this case, the CPU 11 does not update the record whose second identification information is B2.

  When it is determined that there is no article whose storage state has changed (step S106: NO), or when the process of step S107 is completed, the CPU 11 determines whether there is a combination whose state has changed (step S108). ). For example, the CPU 11 determines whether there is a combination whose state has changed at the same time based on the drawer management information and the article management information.

  First, the CPU 11 determines whether or not there is a drawer whose storage state has recently changed. For example, the CPU 11 determines whether the drawer management information includes a record including a state change time whose difference from the current time is within a first time threshold. The first time threshold is a threshold for determining that the drawer storage state and the article storage state have changed at the same time. For example, the first time threshold is preferably set to a time required to completely change the drawer state. The first time threshold is, for example, 1 to 3 seconds. Here, it is assumed that the current time acquired in step S101 is t16, and the time difference between t11 and t16 is equal to or less than the first time threshold. In this case, the CPU 11 assumes that the state of the drawer 410 has recently changed.

  Further, the CPU 11 determines whether there is an article whose state has recently changed. For example, the CPU 11 determines whether or not the article management information includes a record including a state change time whose difference from the current time is within a first time threshold. Here, it is assumed that the current time acquired in step S101 is t16, and the time difference between t11 and t16 is equal to or less than the first time threshold. In this case, the CPU 11 assumes that the state of the article 510 has recently changed.

  Then, the CPU 11 determines whether or not the manner in which the state of the drawer 410 changes corresponds to the manner in which the state of the article 510 changes. Here, the drawer 410 is changed from the storage state to the non-storage state, and the article 510 is changed from the storage state to the non-storage state. Therefore, the CPU 11 determines that the drawer 410 and the article 510 correspond to how the state changes. That is, the CPU 11 determines that the drawer 410 has changed to a non-contained state while the article 510 is accommodated in the drawer 410. In this case, the CPU 11 determines that there is a combination that has changed at the same time.

  When determining that there is a combination that has changed at the same time (step S108: YES), the CPU 11 determines whether the combination has been changed (step S109). For example, the CPU 11 determines whether or not the combination identified in step S108 is inconsistent with the combination indicated by the correspondence information stored in the hard disk 24.

  Here, the correspondence information will be described with reference to FIG. The correspondence relationship information is information indicating the correspondence relationship between the drawer and the article. The correspondence information is information that associates the second identification information with the first identification information, for example. The record indicated by the correspondence information indicates a combination of a drawer and an article whose state has changed at the same time. FIG. 11 shows that the drawer whose state changed last with the article 510 is the drawer 410, shows that the drawer whose state changed last with the article 520 is the drawer 420, and the article (B3) (not shown). The drawer whose state has changed simultaneously with the article) is the drawer 410.

  The combination identified in step S108 is a combination of the article 510 and the drawer 410. On the other hand, the correspondence information indicates that the drawer 410 is the drawer whose state has changed at the same time as the article 510. Therefore, in this case, the CPU 11 determines that the combination has not been changed. On the other hand, if the combination specified in step S108 is a combination of the article 510 and the drawer 420, the CPU 11 determines that the combination has been changed.

  If CPU11 discriminate | determines that the combination was changed (step S109: YES), it will alert | report that the combination was changed (step S110). For example, the CPU 11 displays on the touch screen 16 that the combination has been changed, the combination before the change, the combination after the change, and the like. If the CPU 11 determines that the combination has not been changed (step S109: NO), or completes the process of step S110, the CPU 11 updates the correspondence information (step S111).

  When completing the process in step S111, the CPU 11 determines whether or not there is a drawer that has been forgotten to close (step S112). For example, the CPU 11 determines whether or not there is a record in the drawer management information in which the latest state is the drawer state and the state change time is greater than or equal to the second time threshold. The second time threshold value is a threshold value for determining whether or not the drawer is forgotten to close. The second time threshold is, for example, 10 minutes. When determining that there is such a record, the CPU 11 determines that there is a drawer that has been forgotten to close. On the other hand, if the CPU 11 determines that there is no such record, the CPU 11 determines that there is no drawer forgotten to close.

  If the CPU 11 determines that there is a drawer that has been forgotten to close (step S112: YES), the CPU 11 notifies that there is a drawer that has been forgotten to close (step S113). For example, the CPU 11 displays on the touch screen 16 that there is a drawer that has been forgotten to close, information indicating the drawer that has been forgotten to close, and the like. When it is determined that there is no drawer forgotten to close (step S112: NO), or when the process of step S113 is completed, the CPU 11 determines whether there is an article forgot to return (step S114).

  For example, the CPU 11 determines whether or not there is a record in the article management information where the latest state is the non-accommodating state and the time difference between the state change time and the current time is equal to or greater than a third time threshold. The third time threshold value is a threshold value for determining whether or not the article has been forgotten to be returned. The third time threshold is, for example, one day. When determining that there is such a record, the CPU 11 determines that there is an article that has been forgotten to be returned. On the other hand, when determining that there is no such record, the CPU 11 determines that there is no article that has been forgotten to be returned.

  When determining that there is an article that has been forgotten to be returned (step S114: YES), the CPU 11 notifies that there is an article that has been forgotten to be returned (step S115). For example, the CPU 11 displays on the touch screen 16 that there is an article that has been forgotten to be returned, information indicating the article that has been forgotten to be returned, and the like. When it is determined that there is no article that has been forgotten to be returned (step S114: NO), or when the process of step S115 is completed, the CPU 11 determines whether or not there is an article location confirmation request (step S116).

  For example, the CPU 11 monitors a signal supplied from the touch screen 16 and determines whether there is a request for confirming the location of the article. If the CPU 11 determines that there is a request for confirming the location of the article (step S116: YES), it notifies the location of the article (step S117). For example, the CPU 11 specifies the location of the article for which the location confirmation request is made based on the article management information and the correspondence information. Then, the CPU 11 causes the touch screen 16 to display information indicating the location of the identified article. When the CPU 11 determines that there is no request for confirming the location of the article (step S116: NO), or when the process of step S117 is completed, the process returns to step S101.

  In this embodiment, the state of the drawer is determined based on whether or not the tag information transmitted from the wireless tag installed in the drawer can be read. According to this embodiment, the state of the drawer can be automatically determined. Further, in the present embodiment, information indicating the correspondence between the drawer and the article is stored when the state of the drawer and the state of the article are changed at the same time. For this reason, according to the present embodiment, it is possible to automatically determine the correspondence between the drawer and the article.

  In the present embodiment, a strip-shaped antenna 310 is used for reading the tag information. Here, in the antenna 310, whether or not the tag information can be read greatly depends on the distance between the wireless tag and the antenna 310. Therefore, in the present embodiment, the discrimination accuracy of the state of the drawer or the article is high. The antenna 310 has a wide readable area for tag information. Therefore, in this embodiment, the number of antennas can be small (for example, it is not necessary to prepare a small antenna having a weak radio wave for each drawer). The antenna 310 is thin. Therefore, in this embodiment, the convenience of the installation location is high and space saving is possible.

  In this embodiment, it is possible to automatically determine which article is stored in which drawer without providing an antenna for each drawer. On the other hand, in the invention disclosed in Patent Document 1, it is not possible to specify which article is stored in which drawer unless an antenna is provided for each drawer.

(Modification 1)
In the present invention, a cabinet 460 provided with a conductor plate 407 may be employed to accurately determine the state of the drawer and the article. As shown in FIG. 13A, for example, the conductor plate 407 is fixed to a rotating member 406 that rotates about a rotating shaft 405, and rotates about the rotating shaft 405 together with the rotating member 406. The rotating shaft 405 is fixed inside the ceiling board 403, for example.

  As shown in FIG. 13A, when the drawer 410 is in the housed state, the conductor plate 407 is pushed up by the drawer 410. In this case, the conductor plate 407 does not block radio waves transmitted or received by the antenna 310. As a result, the antenna 310 can easily receive the first radio wave and the second radio wave. On the other hand, as shown in FIG. 13B, when the drawer 410 is in the non-contained state, the conductor plate 407 closes the space between the antenna 310 and the drawer 410 by gravity. In this case, the conductor plate 407 blocks radio waves transmitted or received by the antenna 310. As a result, the antenna 310 becomes difficult to receive the first radio wave and the second radio wave.

In the first modification, the radio wave is not blocked when the drawer 410 is in the stored state, and the radio wave is blocked when the drawer 410 is not in the stored state. Therefore, according to the first modification, an improvement in the accuracy of determining the state of the drawer 410 and the article 510 can be expected.

(Modification 2)
In the first embodiment, an example in which reading of tag information is always executed has been described. In the present invention, the tag information may not be read when in the locked state, and the tag information may be read when in the unlocked state. In this case, for example, a cabinet 470 provided with a locking mechanism 414 is employed. As shown in FIG. 14A, the locking member 417 is fixed to a rotating member 416 that rotates about a rotating shaft 415, for example, and rotates about the rotating shaft 415 together with the rotating member 416. The rotating shaft 415 is fixed to one end of the ceiling plate 403, for example. The locking mechanism 414 has a locked state in which the drawer 410 is maintained in the stored state, and an unlocked state in which the drawer 410 is not maintained in the stored state.

  The state of the locking mechanism 414 is changed by a key (not shown). FIG. 14A shows the cabinet 470 in the locked state, and FIG. 14B shows the cabinet 470 in the unlocked state. In the modified example 2, when the cabinet 470 is in the locked state, the state of the drawer 410 and the article 510 does not change, and thus the process for determining the state of the drawer 410 and the article 510 is not executed. Note that the drawers 420, 430, 440, and 450 are also set to a locked state or an unlocked state by the locking mechanism 414 similarly to the drawer 410. One locking mechanism 414 may be provided for the cabinet 400, and the states of the drawers 410, 420, 430, 440, and 450 may be set in conjunction with each other. Alternatively, the locking mechanism 414 may be provided for each drawer, and the state may be set for each drawer.

  In the second modification, the process of determining the state of the drawer 410 and the article 510 is executed only when the state of the drawer 410 and the article 510 is the unlocked state. Therefore, according to the second modification, reduction of power consumption and processing load can be expected.

(Other variations)
As mentioned above, although embodiment of this invention was described, when implementing this invention, a deformation | transformation and application with a various form are possible.

  In the present invention, which part of the configuration, function, and operation described in the above embodiment is adopted is arbitrary. Further, in the present invention, in addition to the configuration, function, and operation described above, further configuration, function, and operation may be employed. Further, the above-described embodiments can be freely combined as appropriate. Of course, materials, sizes, electrical characteristics, and the like that can be employed in the present invention are not limited to those shown in the above embodiment.

  For example, in the above-described embodiment, the management server 200 stores the drawer information, the article management information, and the correspondence information, and the processing apparatus 100 updates the information. In the invention, the processing device 100 may store the drawer information, the article management information, and the correspondence information, for example.

  Although not mentioned in the above embodiment, the cabinet 400 may be made of an insulator such as wood or plastic, or may be made of a conductor such as a pure metal, an alloy, or a carbon fiber composite material. When the cabinet 400 is made of a conductor, the antenna 310 is preferably attached to the inner surface of the side wall of the cabinet body 401 (the center side wall among the three side walls). Further, it is preferable to provide a through hole or the like for allowing radio waves to pass through on the side walls of the drawers 410, 420, 430, 440, and 450. An acrylic plate or the like may be provided at a location where the through hole is provided, or the drawer side wall may be formed of an acrylic plate.

  In the embodiment described above, an example in which the latest state and state change time of an article or a drawer is stored to save a storage area has been described. In the present invention, every time the state of an article or a drawer is acquired, a history of the article or the state of the drawer may be stored. In this case, was the combination of the article and the drawer changed with reference to the history of the article and the state of the drawer? Is there a drawer that you forgot to close? , Are there any items you forgot to return? Where is the goods located? Etc. are determined. As described above, in the present invention, the stored information and the determination method based on the stored information are not limited to those shown in the above embodiment, and can be appropriately adjusted.

  In the above embodiment, an example in which the number of antennas 310 installed in the cabinet body 401 is one has been described. In the present invention, the number of antennas 310 installed in the cabinet body 401 may be two or more. In this case, for example, it is preferable that two or more antennas 310 are installed side by side in the left-right direction.

  In the above embodiment, an example in which the number of cabinets 400 is one has been described. In the present invention, the number of cabinets 400 may be two or more. In this case, for example, it is preferable that the first identification information includes information for identifying the drawer and information for identifying the cabinet 400.

  In the modification 1, the example in which the conductor plate 407 having a flat plate shape is provided in the cabinet body 401 has been described. In the present invention, the arrangement and shape of the conductor plate are not limited as long as the radio wave is not blocked when the drawer is in the retracted state and the radio wave is blocked when the drawer is not in the retracted state. May be. For example, the drawer 410 may be provided with a conductor plate 407 that can move according to the state of the drawer 410.

  In the embodiment, an example in which many functions of the processing device 100 and the management server 200 are realized by software (or firmware), that is, many of the functions of the processing device 100 and the management server 200 are executed by executing a program by the processor. Explained to be realized. In the present invention, such a function may be realized by hardware. In this case, for example, the processing device 100 and the management server 200 include a processing circuit instead of the CPU 11 or the CPU 21. This processing circuit is configured by, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or a combination thereof.

  By applying an operation program that defines the operation of the processing device 100 or the management server 200 according to the present invention to an existing personal computer or information terminal device, the personal computer functions as the processing device 100 or the management server 200 according to the present invention. It is also possible to make it. Further, such a program distribution method is arbitrary. For example, the program is stored and distributed in a computer-readable recording medium such as a CD-ROM (Compact Disk Read-Only Memory), a DVD (Digital Versatile Disk), or a memory card. Alternatively, it may be distributed via a communication network (for example, the Internet).

  11, 21 CPU, 12, 22 ROM, 13, 23 RAM, 14 Flash memory, 15, 25 RTC, 16 Touch screen, 17, 27 First communication interface, 18 Second communication interface, 24 Hard disk, 100 Processing device, 101 First transmitting unit, 102 Second transmitting unit, 103 receiving unit, 104 discriminating unit, 105 control unit, 106 storage unit, 107 receiving unit, 108 output unit, 200 management server, 300 reading device, 310 antenna, 311, 312 Sheet conductor, 313 dielectric, 314, 315 protective sheet, 316 leaching area, 320 radio wave interface, 321, 322 conductor layer, 323 insulator layer, 324, 325 electrode, 326 connector, 330 communication cable, 331 internal conductor, 332 outside Conductor, 340 radio wave absorber, 341 radio wave absorber, 342, 407 conductor plate, 400, 460, 470 cabinet, 401 cabinet body, 410, 420, 430, 440, 450 drawer, 402 side wall, 403 ceiling plate, 404 floor plate, 405, 415 Rotating shaft, 406, 416 Rotating member, 411, 421, 431, 441, 451 First wireless tag, 412, 432, 442, 452 Handle, 414 Locking mechanism, 417 Locking member, 510, 520 Article 511 521, second wireless tag, 600 communication network, 1000 status determination system.

Claims (8)

A first wireless tag that is installed in a drawer provided so as to be capable of being pulled out with respect to the cabinet body, and that transmits a first radio wave;
The first radio wave is received when the drawer is stored in the cabinet body, and the first radio wave is received when the drawer is not stored in the cabinet body. An antenna installed in the cabinet body so as not to
When the first radio wave is received by the antenna, it is determined that the drawer is in the stored state, and when the first radio wave is not received by the antenna, it is determined that the drawer is in the non-stored state. Determining means for
State determination system. The first radio wave includes first identification information for identifying the drawer,
A second wireless tag that is installed in the article and transmits a second radio wave including second identification information for identifying the article;
The antenna receives the first radio wave and the second radio wave when the drawer houses the article and is in the stowed state, and when the drawer houses the article and is not in the stowed state Installed in the cabinet body so as not to receive the first radio wave and the second radio wave,
The determining means determines that the article is stored in the cabinet body when the second radio wave is received by the antenna, and the article is not received by the antenna when the second radio wave is not received. It is determined that it is not stored in the cabinet body.
The state determination system according to claim 1. A plurality of the drawers are provided for the cabinet body,
Each of the plurality of drawers is provided with the first wireless tag;
The time when the first drawer of the plurality of drawers changed from the non-stored state to the stored state, and the state where the article was not stored in the cabinet body changed to the state stored in the cabinet body. Storage means for storing the first identification information corresponding to the first drawer and the second identification information in association with each other when the time difference from the time is equal to or less than a first time threshold value. In addition,
The state determination system according to claim 2. The cabinet body is provided with a lock for making the drawer locked or unlocked by a key,
The first wireless tag is a passive tag that transmits the first radio wave in response to receiving a radio wave for power supply;
A reader that transmits the electric power supply radio wave from the antenna and causes the antenna to receive the first radio wave;
When the drawer is in the unlocked state, the reader transmits the power supply radio wave from the antenna, and when the drawer is in the locked state, the reader transmits the power supply radio wave from the antenna. And a control means for preventing transmission,
The state discrimination system according to any one of claims 1 to 3. A notification means for notifying that the drawer is forgotten to be closed when the drawer is in the non-storage state for a second time threshold or more;
The state discrimination system according to any one of claims 1 to 4. The antenna includes a first sheet-like conductor having an opening and a second sheet-like conductor, and radio waves propagating inside the antenna are leached out of the opening to cause the first sheet-like conductor. It is a sheet-like antenna that forms a leaching region in the vicinity of a conductor,
The antenna is installed on a side wall having a wall surface orthogonal to a direction in which the drawer is pulled out of the side walls constituting the cabinet body so that the spreading direction of the antenna is parallel to the wall surface,
The first wireless tag is disposed inside the leaching area when the drawer is in the storage state, and is disposed outside the leaching area when the drawer is in the non-storage state. Installed in the drawer,
The state determination system according to any one of claims 1 to 5. When the drawer is in the stored state, the first radio wave from the first wireless tag toward the antenna is not blocked, and when the drawer is in the non-stored state, the first wireless tag A conductor plate for blocking the first radio wave toward the antenna;
The state discrimination system according to any one of claims 1 to 6. A first wireless tag that transmits a first radio wave is installed in a drawer that can be pulled out from the cabinet body,
The first radio wave is received when the drawer is stored in the cabinet body, and the first radio wave is received when the drawer is not stored in the cabinet body. Do not install an antenna on the cabinet body,
When the first radio wave is received by the antenna, it is determined that the drawer is in the stored state, and when the first radio wave is not received by the antenna, it is determined that the drawer is in the non-stored state. To
State determination method.

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