JP2005107792A - Ic tag, article management system using it, entrance/exit management system using it, and tracking system using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an IC tag with a simple structure capable of easily specifying a distance, and to provide an article management system, an entrance/exit management system and a tracking system using it. <P>SOLUTION: In this IC tag 10, a reception circuit 13 demodulates a reception signal received by an antenna 11, inputs it to a CPU 15, and inputs it to a level detection circuit 17. The level detection circuit 17 outputs a voltage level of the inputted reception signal to the CPU 15. The CPU 15 A/D-converts an inputted analog signal to detect electric wave intensity. The CPU 15 reads identification information for uniquely identifying itself from a memory 16. The CPU 15 transmits read data from the antenna 11 through a transmission circuit 14 with detected electric wave intensity data and the read identification information included in the read data. A reader/writer 20 detects a communication state (the electric wave intensity, the distance or the like) in each the IC tag 10 on the basis of the received identification information and electric wave intensity data from the IC tag 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a non-contact type IC tag, an article management system using the same, an input / output management system using the same, and a tracking system using the same.

  Non-contact IC (Integrated Circuit) card according to the prior art (in the present invention, this type of data carrier capable of reading and writing unique identification information including the IC card is hereinafter referred to as an IC tag) 910 and its reader The structure of the writer 920 is shown in FIG. 10 (see, for example, Patent Document 1). As shown in FIG. 10, an antenna 911 and an IC chip 912 are mounted inside the IC tag 910. The antenna 911 is configured by, for example, a loop antenna or a dipole antenna. The IC chip 912 includes a receiving circuit 913, a transmitting circuit 914, a CPU (Central Processing Unit) 915, and a memory 916.

  The reader / writer 920 includes an antenna 921, a transmission circuit 922, a reception circuit 923, a CPU 925, a memory 926, and a level detection circuit 927. The reader / writer 920 transmits data read from the memory 926 and processed by the CPU 925 from the transmission circuit 922 via the antenna 921 with a predetermined radio wave intensity. The IC tag 910 receives the radio wave output from the reader / writer 920 with the antenna 911 and inputs it to the CPU 915 via the receiving circuit 913. The CPU 915 analyzes the received data, reads information from the memory 916, and sends the information from the transmission circuit 914 via the antenna 911. The reader / writer 920 receives the radio wave output from the IC tag 910 by the antenna 921 and inputs it to the CPU 925 via the receiving circuit 923 and also to the level detection circuit 927. The level detection circuit 927 outputs the voltage level of the input signal to the CPU 925 as an analog signal. The CPU 925 detects the radio field intensity of the received signal by A / D converting the input analog signal. The CPU 925 controls the output level at the time of transmission based on the detected radio wave intensity.

  With the above configuration, data can be transmitted and received according to the distance and the like between the IC tag 910 and the reader / writer 920.

Further, as a technology applying the non-contact type IC tag 910 and the reader / writer 920 as described above, for example, an identification system as disclosed in Patent Documents 2 to 4 or other Patent Documents 5 and 6 are disclosed. There are such cart control systems.
JP 2000-242739 A Japanese Patent No. 3051861 Japanese Patent No. 3370825 JP 2003-111130 A Japanese Patent Publication No. 7-69741 Japanese Patent No. 3230491

  However, as shown in FIG. 10, in the configuration in which the means (level detection circuit 927) for detecting the radio wave level is incorporated on the reader / writer 920 side, for example, when a large number of IC tags 910 exist in the communication area, the reader The processing in the writer 920 becomes complicated, and it is difficult to specify the distance of the target IC tag 910 (distance from the reader / writer 920).

  SUMMARY OF THE INVENTION An object of the present invention is to provide an IC tag having a simple configuration and capable of easily specifying a distance, an article management system using the IC tag, an input / output management system using the IC tag, and a tracking system using the IC tag.

  In order to achieve this object, the present invention provides an IC tag having an antenna and transmitting and receiving data in a non-contact manner as described in claim 1, and transmitting and receiving means for transmitting and receiving data via the antenna And storage means for storing data, and level detection means for detecting the intensity of the radio wave received by the antenna, wherein the storage means stores identification information for uniquely identifying the IC tag, The transmission / reception means is configured to transmit the intensity of the radio wave detected by the level detection means and the identification information via the antenna. By making it possible to detect the radio wave intensity in the IC tag, it is possible to reduce the processing of the reader / writer, and it is possible to easily identify the distance to the IC tag with a simple configuration.

  Further, according to the present invention, as described in claim 2, the IC tag according to claim 1, attached to the article, a reader / writer that receives identification information and radio wave intensity from the IC tag, and the article An article management device that manages correspondence with the identification information and a layout of the storage location, the article management device is connected to the reader / writer via a predetermined network, and is input from the reader / writer Based on the identification information, the intensity of the radio wave, and the layout, the storage position of the article associated with the identification information is specified. By making it possible to detect the radio wave intensity in the IC tag, it is possible to reduce the processing of the reader / writer, and it is possible to easily identify the distance to the IC tag with a simple configuration. In addition, the distance between the IC tag and the reader / writer is specified based on the radio wave intensity, and the location of the article to which the IC tag is attached can be easily identified by comparing it with the layout of the storage location registered in advance. can do.

  According to a third aspect of the present invention, the IC tag according to the first aspect, a plurality of reader / writers that receive identification information and radio wave intensity from the IC tag, and the plurality of reader / writers, An entry / exit management device that is communicably connected via a predetermined network and that identifies the position of the IC tag based on the identification information and the radio wave intensity input from the plurality of reader / writers. The output management device is configured to manage the entry / exit of the IC tag using the position where the IC tag is first detected as an entry path and the position where the IC tag is last detected as an exit path. By making it possible to detect the radio wave intensity in the IC tag, it is possible to reduce the processing of the reader / writer, and it is possible to easily identify the distance to the IC tag with a simple configuration. In addition, when the IC tag enters the area where the reader / writer's radio wave reaches, the first detected position and the last detected position can be managed to easily determine which route the IC tag has taken. It is possible to identify and manage entry / exit of a person or an article wearing the same.

  Further, according to the present invention, as described in claim 4, the IC tag according to claim 1, which is attached to a tracking object, a reader / writer that receives identification information and radio wave intensity from the IC tag, and the reader A self-propelled cart on which a writer is mounted; and a self-propelled device that controls a traveling direction of the cart and applies a propulsive force to the cart. The self-propelled device is connected to the reader / writer, and the reader / writer The position relationship between the IC tag and the self is specified based on the intensity of the radio wave input from the vehicle, and the traveling direction of the cart is controlled so that the distance between the self and the tracking object is kept constant. Is configured to give propulsion to By making it possible to detect the radio wave intensity in the IC tag, it is possible to reduce the processing of the reader / writer, and it is possible to easily identify the distance to the IC tag with a simple configuration. If the reader / writer is provided with a plurality of antennas having different directivities or detection ranges, the IC tag is read while selecting the antenna, and the radio wave intensity transmitted from the IC tag is compared, thereby comparing the IC The direction or range in which the tag exists can be specified, and the positional relationship between the IC tag (the tracking target object to which the tag is attached) and itself can be specified.

  Further, according to the present invention, as described in claim 5, the self-propelled device is connected to an infrared sensor that obtains a positional relationship between the surrounding object and the self, and the positional relationship input from the infrared sensor The positional relationship between the IC tag and itself is specified based on the intensity of the radio wave input from the reader / writer. By combining the distance to the object detected by the IC tag with the positional relationship with the object detected by the infrared sensor, the tracking target object such as a person or an article wearing the IC tag can be more reliably specified with a small-scale configuration. And a system for tracking this can be easily constructed.

  According to the present invention, it is possible to realize an IC tag having a simple configuration and capable of easily specifying a distance, an article management system using the tag, an input / output management system using the IC tag, and a tracking system using the IC tag.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  First, Embodiment 1 according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a non-contact type IC tag (or card) 10 and its reader / writer 20 according to the first embodiment.

  The IC tag 10 has a configuration in which an antenna 11 and an IC chip 12 are mounted on a film-like substrate called an inlet. For example, a loop antenna or a dipole antenna can be applied to the antenna 11. The IC chip 12 has a configuration in which at least the receiving circuit 13, the transmitting circuit 14, the CPU 15, the memory 16, and the level detecting circuit 17 are integrated. The reception circuit 13, the transmission circuit 14, and the CPU 15 function as transmission / reception means for transmitting / receiving data via an antenna. The memory 16 functions as a storage means for storing various data such as identification information described later. Further, the reception circuit 13 and the level detection circuit 17 function as level detection means for detecting the intensity of the radio wave received by the antenna (radio wave intensity).

  On the other hand, the reader / writer 20 includes an antenna 21, a transmission circuit 24, a reception circuit 23, a CPU 25, a memory 26, and an I / F (interface) 28. The CPU 25 processes data to be transmitted to the IC tag 10 such as data read from the memory 26 and data input via the I / F 28, and inputs this to the transmission circuit 24. The transmission circuit 24 modulates the input data and transmits it from the antenna 21.

  The IC tag 10 receives the radio wave output from the reader / writer 20 with the antenna 11 and inputs this to the receiving circuit 13. The receiving circuit 13 demodulates the input received signal, inputs it to the CPU 15 and inputs it to the level detection circuit 17.

  The level detection circuit 17 outputs the voltage level of the input reception signal to the CPU 15 as an analog signal. The CPU 15 detects the radio wave intensity of the received signal by A / D converting the input analog signal, and writes the data input from the receiving circuit 13 into the memory 16 or reads out information corresponding to the data from the memory 16. . At this time, the CPU 15 reads identification information for uniquely identifying itself (IC tag 10) from the memory 16. The identification information is stored in the memory 16 in advance when the IC tag 10 is manufactured.

  Further, the CPU 15 includes data indicating the detected radio wave intensity (hereinafter referred to as radio wave intensity data) and the read identification information in the read data, and thereafter inputs the data to the transmission circuit 14. The transmission circuit 14 modulates the input data and transmits it from the antenna 11. On the other hand, the reader / writer 20 receives the radio wave output from the IC tag 10 by the antenna 21 and inputs it to the receiving circuit 23. The receiving circuit 23 demodulates the input received signal and inputs it to the CPU 25. The CPU 25 extracts identification information and radio wave intensity data from the input data, and detects the communication state (radio wave intensity, distance, etc.) for each IC tag 10. When the communication state for each IC tag 10 is detected in this way, the CPU 25 controls the radio wave intensity at the time of transmission based on this communication state, and performs subsequent communication.

  Next, an article management system 100 using the IC tag 10 and the reader / writer 20 will be described with reference to the drawings.

  FIG. 2 is a system diagram showing the configuration of the article management system 100. As shown in FIG. 2, the article management system 100 is connected to the articles 102 a to 102 d to which the IC tags 10 a to 10 d are attached, the reader / writer 20 that reads and writes the IC tags 10 a to 10 d, and the reader / writer 20. The user terminal 101 is configured.

  In the above configuration, the articles 102a to 102d are stored or displayed (hereinafter referred to as storage) on a shelf such as a warehouse or a store, and the IC tags 10a to 10d are attached to each of them. Each of the IC tags 10a to 10d has the same configuration as that of the IC tag 10. In the following description, the reference number of any IC tag 10a to 10d is assumed to be 10. Also, description will be made assuming that reference numeral 102 of any article 102a to 102d is 102.

  The reader / writer 20 transmits radio waves to the IC tag 10 as necessary or periodically. That is, a call is made to the IC tag 10. When the IC tag 10 receives the radio wave from the reader / writer 20 with the antenna 11, the IC tag 10 demodulates the received signal with the receiving circuit 13. The reception circuit 13 inputs the obtained data to the CPU 15 and inputs a reception signal to the level detection circuit 17. The level detection circuit 17 outputs the voltage level of the input reception signal to the CPU 15 as an analog signal. The CPU 15 A / D converts the input analog signal to generate radio wave intensity data, analyzes the data input from the receiving circuit 13, writes the data to the memory 16, or sets information corresponding to the data. Read from the memory 16. At this time, the CPU 15 also reads identification information for uniquely identifying itself (IC tag 10) from the memory 16. When the identification information and the radio wave intensity data are acquired in this way, the CPU 15 next stores the identification information and the radio wave intensity data in a predetermined area in the data to be transmitted, and this is read from the transmission circuit 14 via the antenna 11. Transmit to writer 20.

  When the reader / writer 20 receives the radio wave from the IC tag 10 by the antenna 21, the reader / writer 20 demodulates the radio wave by the receiving circuit 23 and then inputs the obtained data to the CPU 25. The CPU 25 extracts identification information and radio wave intensity data from the input data, and detects the radio wave intensity for each IC tag 10.

  When the radio wave intensity relating to all the IC tags 10 is detected by the processing as described above, the CPU 25 sets itself so as to transmit radio waves at an intensity matched to the IC tag 10 having the weakest radio wave intensity. Thereby, favorable communication with all the IC tags 10 is realizable.

  Further, the radio wave intensity data for each piece of identification information obtained by the reader / writer 20 is input to the user terminal 101 via a predetermined network. The user terminal 101 is composed of an information processing apparatus such as a personal computer. Therefore, by managing the correspondence between the IC tag 10 and the article 102 in the user terminal 101, the user terminal 101 can be used to specify the distance of the desired article 102 from the reader / writer 20. In addition, by managing the layout of a shelf or the like (hereinafter referred to as a storage location) in which the article 102 is stored in the user terminal 101 and comparing this with the distance obtained above, where the article 102 is located Can be specified.

  Next, the operation of the article management system 100 will be described in detail with reference to the flowchart shown in FIG.

  As shown in FIG. 3, when the user starts a predetermined program from the user terminal 101, the user terminal 101 first has identification information and radio waves for each IC tag 10 via a predetermined network such as a LAN (Local Area Network). The reader / writer 20 is requested for intensity data (step S101). In this description, the I / F 28 is a network adapter.

  In response to this request, the reader / writer 20 emits radio waves and collects identification information and radio wave intensity data from each IC tag 10. The reader / writer 20 transmits the collected identification information and radio wave intensity data to the user terminal 101 via the predetermined network.

  When the user terminal 101 receives the identification information and the radio wave intensity data from the reader / writer 20 via a predetermined network (step S102), the IC tag 10 and the reader / writer to which each identification information is assigned based on the radio wave intensity data. The distance to 20 is specified (step S103). Note that this step can be easily calculated by associating the radio wave intensity with the distance in the user terminal 101, for example.

  Next, the user terminal 101 specifies the distance to the article 102 by specifying the correspondence between the IC tag 10 and the article 102 (step S104). The correspondence between the IC tag 10 and the article 102, that is, the correspondence between the identification information and the article 102, can be easily specified by registering in the user terminal 101 in advance and managing it as a table.

  When the distance to the article 102 is identified in this way, the user terminal 102 identifies the location where the article 102 is stored by comparing the layout of the storage location registered in advance with the distance to the article 102 ( This is provided to the user through the screen (display) of the user terminal 101 (step S105). Thereby, the user can easily specify the storage position of the desired article 102 through the display.

  Next, a second embodiment of the present invention will be described in detail with reference to the drawings. The second embodiment shows an example in which a person or article entry / exit management system is constructed using the IC tag 10 and the reader / writer 20 described in the first embodiment. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. Further, the configuration not specifically mentioned is the same as that of the first embodiment.

  FIG. 4 is a diagram illustrating a configuration of an entry / exit management system 200 according to the second embodiment. In the second embodiment, as shown in FIG. 4, reader / writers 20 a and 20 b are installed at positions sandwiching the branch points from the path A to the paths B and C. The reader / writers 20a and 20b are the same as the reader / writer 20 shown in the first embodiment.

  The reader / writers 20a and 20b emit radio waves periodically, for example, every second, and make a call to the IC tag 10 in a predetermined area. Therefore, when the passerby passes from the passage A to the passage B or C, or from the passage B or C to the passage A, for example, the reader / writers 20a and 20b have the IC tag 10 worn by the passerby who has entered the area for passage. Identification information and radio wave intensity data can be received. The area refers to a range in which the reader / writers 20a and 20b can receive radio waves from the IC tag 10.

  The identification information and radio wave intensity data received by the reader / writers 20a and 20b are input to the user terminal 201 via a predetermined network (LAN, serial / parallel line, etc.) together with time information. That is, the reader / writers 20a and 20b notify the user terminal 201 of time information, identification information, and radio wave intensity data. Here, the reader / writers 20a and 20b can always receive the identification information and the radio wave intensity data by making a call while the passer-by is passing through the area. That is, the passage route for each passerby can be specified.

  Next, the operation in which the user terminal 201 performs entry / exit management will be described in detail with reference to the drawings. FIG. 5 is a flowchart showing the operation of the user terminal 201.

  As shown in FIG. 5, when the identification information and radio wave intensity data collected from the IC tag 10 in the area at time t are acquired from the reader / writers 20a and 20b (step S201), the user terminal 201 acquires the acquired identification. It is determined whether there is unselected identification information among the information (step S202). Note that selection refers to selection in step S203.

  If there is unselected identification information as a result of the determination in step S202 (Yes in step S202), the user terminal 201 selects one of the acquired identification information that has not been selected (step S203). Next, the user terminal 201 specifies the current position of the IC tag 10 based on the two radio wave intensity data obtained from the reader / writers 20a and 20b corresponding to the selected identification information (step S204).

  Next, the user terminal 201 determines whether or not the identification information selected in step S203 has been registered in the area inclusion list 211 (step S205). Here, the area resident list 211 is shown in FIG. As shown in FIG. 6, the area inclusion list 211 stores identification information, an approach route (time information), and an exit route (time information) in association with each other. In step S <b> 205, the user terminal 201 refers to the identification information in the area presence list 211 to determine whether registration has been completed.

  As a result of the determination in step S205, when the identification information is not registered in the area inclusion list 211 (No in step S205), in other words, when the IC tag 10 is detected first (however, in this description, the first is the IC When the tag 10 passes through the area once, the user terminal 201 newly registers this identification information in the area resident list 211 (step S206). Next, the user terminal 201 registers the current position specified in step S204 as an approach route with the time information (time t) in the area presence list 211 (step S207). Thereafter, the user terminal 201 returns to step S202.

  If the identification information is registered in the area inclusion list 211 as a result of the determination in step S205 (Yes in step S205), the user terminal 201 uses the current position specified in step S204 as the exit route to obtain time information (time t ) In the area presence list 211 (step S208). Thereafter, the user terminal 201 returns to step S202.

  If the identification information that has not been selected does not exist as a result of the determination in step S202 (No in step S202), the user terminal 201 acquires new identification information from the identification information registered in the area presence list 211. It is determined whether or not there is a missing item (step S209). In other words, it is determined whether there is an IC tag 10 that has already left the area. However, the case where there is no identification information that has not been selected includes the case where there is no acquired identification information.

  As a result of the determination in step S209, when there is identification information for which identification information has not been newly acquired (Yes in step S209), the user terminal 201 determines that this identification information and the approach route (time information) associated with this identification information. The exit route (time information) is moved to the passer-by list 212 (step S210), and the current process is completed. At this time, the position registered in the area inclusion list 211 as the exit route is detected at the end (however, in this description, the end indicates the end when the IC tag 10 passes through the area once). It is the position that was done.

  Here, the passer-by list 212 is shown in FIG. As shown in FIG. 7, in the passer-by list 212, identification information, an approach route (time information), and an exit route (time information) are stored in association with each other, similarly to the area inclusion list 211. By referring to the passer list 212, the user terminal 201 can manage when and in which direction the passer with which IC tag 10 has passed.

  Next, Example 3 of the present invention will be described in detail with reference to the drawings. The third embodiment shows an example in which a tracking system in which a golf cart or the like tracks a tracking target object such as a player or an object is constructed using the IC tag 10 and the reader / writer 20 described in the first embodiment. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. Further, the configuration not specifically mentioned is the same as that of the first embodiment.

  FIGS. 8A and 8B are diagrams illustrating the configuration of the tracking system 300 according to the third embodiment. In the third embodiment, as shown in FIG. 8, the golf cart 310 on which the self-propelled device 311 is mounted is configured to track the player 320 wearing the IC tag 10.

  The golf card 310 includes a self-propelled device 311, front wheels 312 a and rear wheels 312 b driven by the self-propelled device 311, an infrared sensor 313, a reader / writer 20, and a battery 314 that supplies power to these. The self-propelled device 311, the infrared sensor 313, and the reader / writer 20 are communicably connected via a predetermined network such as a bus.

  The infrared sensor 313 periodically scans objects (players, trees, objects, etc.) existing around the self (however, the self may be used as the golf cart 310) using infrared rays, and the positional relationship with these (golf cart) (Distance and direction from 310). In addition, the reader / writer 20 calls the IC tag 10 in synchronization with the scan by the infrared sensor 313, thereby specifying the distance to the player 320 that the player himself (however, may be the golf cart 310) should track. .

  The positional relationship with the object acquired by the infrared sensor 313 and the distance to the player 320 acquired by the reader / writer 20 are input to the self-propelled device 311. The self-propelled device 311 is equipped with an electronic device necessary for various data processing, such as an arithmetic processing device such as a CPU, a memory, etc., and by processing the information input as described above, The position relationship with the player 320 to be tracked is specified. The self-propelled device 311 is also provided with a self-propelled mechanism such as a motor and an axle connected to the front wheel 312a and the rear wheel 312b, and controls the traveling direction of the golf cart 310 and applies a propulsive force to the golf cart 310. It is configured to be.

  Instead of using the infrared sensor 313, a plurality of antennas having different directivities or detection ranges are used as receiving means of the reader / writer 20, and the IC tag is read for each antenna to obtain radio wave intensity data from the IC tag. The position of the IC tag may be specified by comparing the radio wave intensity data obtained for each lead. When such a receiving means is used, the position of the IC tag itself can be specified. However, the infrared sensor is used in the golf cart of the present embodiment because the infrared sensor is inexpensive and has a small configuration as compared with such receiving means. Further, since the player 320 is specified based on the comparison between the positional relationship with the object acquired by the infrared sensor 313 and the distance to the player 320 acquired by the reader / writer 20, more reliable specification is possible. In addition, since the infrared sensor can detect an object regardless of the presence or absence of an IC tag, the self-propelled device 311 can also be used to control collision prevention with a player wearing the IC tag or other objects. .

  Therefore, when the self-propelled device 311 identifies the positional relationship with the player 320, the self-propelled device 311 drives the front wheel 312a and the rear wheel 312b based on this to track the player 320 while maintaining a certain distance from the player 320. For example, it is assumed that the front wheel 312 a controls the traveling direction of the golf cart 310, and the rear wheel 312 b gives a driving force to the golf cart 310.

  Next, the operation when the self-propelled device 311 tracks the player 320 will be described in detail with reference to the drawings. FIG. 9 is a flowchart showing the operation of the self-propelled device 311.

  As shown in FIG. 9, the positional relationship (distance and direction to the object) with the object scanned and collected by the infrared sensor 313 at time t, and identification information and radio wave intensity data collected by the reader / writer 20 at the same time t. Are acquired via a predetermined network (steps S301 and S302), the self-propelled device 311 specifies the distance between the player 320 and the player (golf cart 310) to be tracked based on the acquired radio wave intensity data ( Step S303).

  Next, the self-propelled device 311 specifies the positional relationship between the player (the golf cart 310) and the player 320 based on the positional relationship with the object acquired in step S301 and the distance to the player 320 specified in step S303. (Step S304). This is because, for example, the distance to the object obtained by the infrared sensor 313 is compared with the distance to the player 320 obtained from the radio wave intensity data, and an object showing the same degree is defined as the player 320, thereby making the player 320 more Certainly can be identified.

  Next, the self-propelled device 311 tracks the player 320 by rotating the front wheel 312a in the direction of the player 320 and driving the rear wheel 312b so as to maintain a certain distance from the player 320 (step S305). With the above operation, the golf cart 310 can be controlled to track the player 320 while keeping the distance from the player 320 constant.

  In addition, the said Example 1- Example 3 is only an example for implementing this invention, This invention is not limited to these, Various deformation | transformation of these Examples is in the range of this invention. It is obvious from the above description that various other embodiments are possible within the scope of the present invention.

It is a block diagram which shows the structure of the IC tag 10 and the reader / writer 20 by Example 1 of this invention. 1 is a system diagram illustrating a configuration of an article management system 100 according to a first embodiment of the present invention. It is a flowchart which shows operation | movement of the user terminal 101 shown in FIG. It is a system diagram which shows the structure of the entrance / exit management system 200 by Example 2 of this invention. It is a flowchart which shows operation | movement of the user terminal 201 shown in FIG. It is a table which shows the structure of the area resident list 211 by Example 2 of this invention. It is a table which shows the structure of the passer-by list 212 by Example 2 of this invention. It is a system diagram which shows the structure of the tracking system 300 by Example 3 of this invention. It is a flowchart which shows operation | movement of the self-propelled apparatus 311 shown in FIG. It is a block diagram which shows the structure of the IC tag 910 and reader / writer 920 by a prior art.

Explanation of symbols

10, 10a to 10d IC tag 11, 21 Antenna 12 IC chip 13, 23 Receiver circuit 14, 24 Transmitter circuit 15, 25 PCU
16, 26 Memory 17 Level detection circuit 20, 20a, 20b Reader / writer 28 I / F
DESCRIPTION OF SYMBOLS 100 Goods management system 101, 201 User terminal 102, 102a-102d Goods 200 Entrance / exit management system 211 Area in-place list 212 Passer list 300 Tracking system 310 Golf cart 311 Self-propelled device 312a Front wheel 312b Rear wheel 313 Infrared sensor 314 Battery 320 Player

Claims (5)

An IC tag having an antenna and performing transmission and reception of data without contact,
Transmitting and receiving means for transmitting and receiving data via the antenna;
Storage means for storing data;
Level detecting means for detecting the intensity of radio waves received by the antenna,
The storage means stores identification information for uniquely identifying the IC tag,
The IC tag, wherein the transmission / reception means transmits the intensity of the radio wave detected by the level detection means and the identification information via the antenna. The IC tag according to claim 1 attached to an article;
A reader / writer for receiving identification information and radio wave intensity from the IC tag;
An article management device for managing correspondence between the article and the identification information and a layout of a storage location;
The article management apparatus is communicably connected to the reader / writer via a predetermined network, and the identification information is associated with the identification information input from the reader / writer based on the radio wave intensity and the layout. An article management system for specifying a storage position of a given article. The IC tag according to claim 1,
A plurality of reader / writers for receiving identification information and radio wave intensity from the IC tag;
An entry / exit management device that is connected to the plurality of reader / writers via a predetermined network so as to be able to communicate, and identifies the position of the IC tag based on the identification information and the radio wave intensity input from the plurality of reader / writers; Have
The entry / exit management device manages entry / exit of the IC tag using an entry path as a position where the IC tag is first detected and an exit path as a position where the IC tag is detected last. Management system. The IC tag according to claim 1 attached to a tracking object;
A reader / writer for receiving identification information and radio wave intensity from the IC tag;
A self-propelled cart equipped with the reader / writer;
A self-propelled device for controlling the traveling direction of the cart and for providing a propulsive force to the cart;
The self-propelled device is connected to the reader / writer, specifies the positional relationship between the IC tag and the self based on the intensity of the radio wave input from the reader / writer, and the distance between the self and the tracking target object is constant. A tracking system characterized by controlling the direction of travel of the cart so as to maintain the driving force and applying a propulsive force to the cart. The self-propelled device is connected to an infrared sensor that acquires a positional relationship between a surrounding object and itself,
5. The tracking system according to claim 4, wherein the positional relationship between the IC tag and itself is specified based on the positional relationship input from the infrared sensor and the intensity of the radio wave input from the reader / writer. .

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