JP2004310370A - Portable article management method and device, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique capable of preventing the loss of a portable article by early detecting that the portable article separates from a holder. <P>SOLUTION: A center device determines, by use of a plurality of radio ID readers connected to the center device, whether or not the tag ID of a first radio ID tag mounted on a first object to be held by a holder and the tab ID of a second radio ID tag mounted on a second object to be held by the holder are received within a time regarded as the same time from one radio ID reader of the radio ID readers. When it is determined that the two tag IDs are not received within the time regarded as the same time from the one radio ID reader, a notice is given to the holder. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technique for enabling early detection when a lost item is carried, and for further preventing the lost item.
[0002]
[Prior art]
As an example of a technology for preventing the loss of a portable item, a small transmitter for transmitting radio waves to a container for storing the portable item is provided. There is a technique in which a melody is emitted from a mobile phone when radio waves cannot be received from the body, and the holder is notified that the housing has left (see Patent Document 1). In addition, a technology has been developed to lock the operation of a mobile terminal such as a PDA or a mobile phone when the mobile terminal is separated from the wristwatch by a certain distance, thereby minimizing damage even if the mobile terminal is stolen. ing. In addition, there are techniques disclosed in Patent Documents 1 to 7 as conventional techniques.
[0003]
[Patent Document 1]
JP-A-2002-334385
[0004]
[Patent Document 2]
JP 2002-319075 A
[0005]
[Patent Document 3]
JP 2002-190077 A
[0006]
[Patent Document 4]
JP-A-2002-159056
[0007]
[Patent Document 5]
JP 2001-283350 A
[0008]
[Patent Document 6]
JP 2001-237950 A
[0009]
[Patent Document 7]
JP 2000-215374 A
[0010]
[Problems to be solved by the invention]
However, with the above-described conventional technology, it is difficult to know where the lost belongings are, and it is difficult to find the belongings early.
[0011]
The present invention has been made in view of the above points, and an object of the present invention is to provide a technique for preventing loss by detecting early that a carrying item has left a holder.
[0012]
[Means for Solving the Problems]
The object described above is a method for notifying that an object has left the object holder by using a plurality of wireless ID readers connected to the center apparatus, wherein the center apparatus holds the object by the holder. The tag ID of a first wireless ID tag attached to a first object to be attached and the tag ID of a second wireless ID tag attached to a second object to be held by the holder are stored in the plurality of wireless IDs. The center device determines whether or not to receive the two tag IDs from one of the readers within a time that can be regarded as simultaneous. If it is determined that there is no notification, the problem is solved by a method of notifying the holder.
[0013]
According to the present invention, it is determined whether or not each tag ID has been detected by the same reader from two wireless ID tags attached to two objects (e.g., portable items) held by the holder. By always wearing one of them, it can be determined whether or not the other object has left the holder. Then, a notification can be made based on the determination result. Further, by employing a configuration using a plurality of wireless ID readers and a center device, it becomes possible to provide positional information of the portable item after the lost item is lost.
[0014]
Further, upon receiving the tag ID, the center device stores a time stamp and a reader ID of the RF-ID reader that is the transmission source of the tag ID in association with the tag ID, and stores the two tag IDs. When it is determined that the two tag IDs are not received within a time that can be regarded as simultaneous from one wireless ID reader, based on a reader ID stored corresponding to a predetermined one of the two tag IDs, By notifying the holder of the position information, it is possible to notify the position information of the portable item when the portable item leaves the holder.
[0015]
The above object is a method of notifying that an object has left the holder of the object, wherein a portable wireless ID reader held by the holder is attached to the object to be held by the holder. If the tag ID of the wireless ID tag is not detected, the non-detection notification including the tag ID is transmitted to the center device, and the center device receives the non-detection notification, and performs the non-detection notification based on the tag ID included in the non-detection notification. The problem can also be solved by notifying the holder.
[0016]
According to the present invention, since the center device notifies based on the fact that the portable wireless ID reader does not detect the tag ID of the wireless ID tag attached to the object to be held by the holder, the portable item is separated from the holder. Can be notified.
[0017]
Further, the present invention is a center device for notifying that an object has left a holder of the object by using a plurality of wireless ID readers arranged at a predetermined place, wherein the holder holds the object. The tag ID of a first wireless ID tag attached to a first object to be attached and the tag ID of a second wireless ID tag attached to a second object to be held by the holder, Means for determining whether or not to be received within a time that can be regarded as simultaneous from one of the ID readers, and that the two tag IDs have not been received within a time that can be regarded as simultaneous from one of the wireless ID readers When the determination is made, the center device may be configured to have a means for notifying the holder.
[0018]
A center device for notifying that an object has left the holder of the object, wherein a portable wireless ID reader held by the holder has a wireless ID attached to the object to be held by the holder. Means for receiving a non-detection notification including the tag ID from the portable wireless ID reader when the tag ID of the tag is not detected, and means for notifying the holder based on the tag ID included in the non-detection notification May be configured as a center device having
[0019]
Furthermore, the present invention can also be configured as a program that causes a computer to execute each procedure in the above method.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, the loss of the portable item is prevented or the position of the lost item is grasped by using the RF-ID system.
[0021]
Here, the RF-ID system is an abbreviation for Radio Frequency Identification system (radio wave type recognition system). The RF-ID system includes an RF-ID reader and an RF-ID tag, and performs wireless communication between the RF-ID reader and the RF-ID tag, so that the RF-ID reader stores the RF-ID reader in the RF-ID tag. It is possible to read the information. The RF-ID tag has various shapes, for example, a label type and a card type, and can be easily attached to a portable item such as a wallet, an umbrella, and a bag. Recently, a communication distance between the RF-ID reader and the RF-ID tag of about 10 m has been developed. In this specification, “wireless ID” may be used as a broader term including a technology generally called “RF-ID”.
[0022]
First, an outline of an embodiment (first to third embodiments) of the present invention will be described with reference to FIG.
[0023]
In the first embodiment, RF-ID readers are installed at a plurality of predetermined places on the street. Then, an RF-ID tag is attached to valuables such as valuables in advance, and the RF-ID reader installed on the street reads the tag ID of the RF-ID tag attached to the personal belongings, so that the belongings can be identified. It detects that it is near the RF-ID reader and transmits the tag ID and the reader ID to the center system. In the center system, information including a reader ID and a time stamp is sequentially stored in correspondence with the tag ID. With such a configuration, when valuables are lost, by accessing the center system from a personal computer or a portable terminal (mobile phone, PDA, etc.), the search for the current position of the lost item and the past movement history can be performed. It becomes possible, and early detection of lost items becomes possible.
[0024]
Also in the second embodiment, RF-ID readers are installed at a plurality of predetermined places on the street. Then, the RF-ID tag is attached to the portable item in advance, and the RF-ID tag is attached to a portable item (for example, a wallet, clothes, etc.) that the holder of the portable item always carries separately from the portable item. An RF-ID reader installed on the street detects a tag ID of an RF-ID tag attached to a portable item and a tag ID of an RF-ID tag attached to an object that is always carried, and detects both RF-ID tags. Is transmitted to the center system. In the center system, it is monitored whether or not the two tag IDs are detected by the same RF-ID reader, and the two tag IDs are detected by different RF-ID readers, or one of them is not detected at all. In some cases, an alarm notification is sent to the portable terminal of the holder. As a result, it is possible to quickly detect that the belongings have left the body, leading to loss prevention.
[0025]
In the third embodiment, a user has a portable RF-ID reader. Then, an RF-ID tag is attached to the portable item in advance, and the portable RF-ID reader transmits the tag ID and the reader ID to the center system at regular intervals. The center system monitors whether or not the tag ID is received corresponding to the reader ID. When the tag ID is no longer received from the portable RF-ID reader, the center system monitors the holder's mobile terminal. For example, an alarm is notified.
[0026]
Hereinafter, each embodiment will be described in more detail.
[0027]
(First Embodiment)
FIG. 2 shows a system configuration diagram of the first embodiment.
[0028]
As shown in FIG. 2, the system according to the present embodiment includes a plurality of RF-ID readers 1 arranged at a predetermined place on a street, a center system 2 that receives information from the RF-ID readers 1, The terminal 3 is connected to the Internet 4. The user terminal 3 is, for example, a PC (personal computer). Further, the mobile terminal can be connected to the Internet via a mobile communication network, and mail can be transmitted from the system to the mobile terminal. This mobile terminal can be used as the user terminal. The RF-ID reader 1 can be connected to the Internet 4 by various methods. For example, the RF-ID reader 1 is connected to the Internet 4 via a mobile communication network.
[0029]
The center system 2 has an information management server 21 and its storage device 22, and a mail transmission server 23. The center system 2 may be configured as a single computer having a program for performing processing according to the present invention and a program for performing mail transmission processing, or may be configured with a plurality of computers for each of the above processing. Is also good. Further, the above-described program can be provided to another computer via a network, or can be stored in a recording medium such as a CD-ROM and installed in the computer.
[0030]
Further, the RF-ID reader 1 has a reading unit 11 for reading a tag ID by wireless communication, a communication device 12 for transmitting a signal via the Internet 4, and a control device 13 for controlling operation. . The control device 13 has a storage function for storing a reader ID, data necessary for communication, and the like, and a display function for performing an alarm display and the like as necessary.
[0031]
Next, information stored in the center system 2 will be described. FIG. 3 shows the user individual information stored in the center system 2, and FIG. 4 shows the common information stored in the center system 2.
[0032]
As shown in FIG. 3, the center system 2 holds a user ID, a tag ID corresponding to the user ID, and a user mail address as user individual information. In addition, for each tag ID, information including a reader ID received from each RF-ID reader and a time stamp attached each time it is received is sequentially accumulated. FIG. 3 shows that information numbers are assigned in ascending order of time, and n + α is assigned as the latest information number.
[0033]
In addition, as a setting for notifying the notification destination of the user when passing through a predetermined RF-ID reader corresponding to the tag ID, the reader ID is associated with the tag ID and set as a “notification designated reader ID”. Be recorded.
[0034]
As shown in FIG. 4, as the common information, a reader ID location code is stored in association with the reader ID, and location information such as an address is stored in association with the reader ID location code.
[0035]
Next, the operation of the system according to the first embodiment will be described with reference to FIG.
[0036]
As described above, an RF-ID tag is attached to a portable item. When the holder of the portable item enters a predetermined range from the RF-ID reader installed on the street (step S1), the RF-ID reader detects the tag ID of the RF-ID tag (step S2). . Here, "within the predetermined range" means a range within which the RF-ID reader can detect the tag ID by wireless communication.
[0037]
Then, the RF-ID reader sends a detection signal to the center system via the Internet (step S1). The detection signal includes the detected tag ID and the reader ID of the RF-ID reader. Instead of transmitting the reader ID from the RF-ID reader to the center system, the center system may add the reader ID to the received tag ID from the address of the RF-ID reader that transmitted the tag ID. .
[0038]
The center system that has received the detection signal adds a time stamp to the detection signal, and stores the time stamp and the reader ID as the latest information in the storage device in association with the tag ID (step S3). Data is stored sequentially and deleted after a certain period of time.
[0039]
When the holder of the belongings has lost the belongings, the user accesses the center system by inputting the user ID from the user terminal (step S4). The accessed center system acquires the tag ID corresponding to the user ID (step S5), and acquires the latest reader ID and time stamp corresponding to the tag ID (step S5). Then, the actual location information of the reader ID is obtained (step S7) and displayed on the user terminal (step S8). At the time of display, the address and time may be displayed in characters, or a map may be displayed to indicate the position in the map. If the user has registered a plurality of tag IDs, information on a plurality of items to be carried is displayed. Also, instead of displaying information on a plurality of portable items, it is also possible to display only information on the tag ID by inputting the tag ID of the portable item whose status is to be grasped when accessing the center system.
[0040]
When the user grasps the traveling route of the belongings, the user first accesses the center system from the user terminal in the same manner as described above. Then, a period for which confirmation is desired is input and transmitted to the center system. The center system that has received the access acquires the tag ID corresponding to the user ID, and acquires information including a plurality of reader IDs and a time stamp in the period corresponding to the tag ID. Then, the actual location information of each reader ID is acquired, and the position of the portable item at each time indicated by the time stamp is displayed on the user terminal using the time stamp and the location information.
[0041]
(Second embodiment)
Next, a second embodiment will be described. The system configuration of the second embodiment is the same as that of the first embodiment. However, in the present embodiment, the RF-ID tag is attached not only to the portable item but also to a non-portable item that the holder of the portable item always carries. (This is referred to as a watch tag carrying item). The information stored in the center system is almost the same as that of the first embodiment, but the information shown in FIG. 6 is added. That is, an emergency contact, which is a destination to be contacted by using the e-mail or the like from the center system when a portable item with the RF-ID reader having the tag ID is lost, is registered with respect to the tag ID. This makes it possible to notify an emergency contact when the belongings are lost. The tag ID and the contact information at the time of loss are registered at the time of user registration, for example.
[0042]
Next, the operation of the system according to the second embodiment will be described with reference to FIG. When the holder of the carry-on article with the RF-ID tag and the carry-on article with the watch tag approaches one of the plurality of RF-ID readers installed on the street within a predetermined range (step). S11) The RF-ID reader reads the tag ID of the RF-ID tag of the portable item with the RF-ID tag (hereinafter referred to as tag ID1) and the tag ID of the RF-ID tag of the portable item with the watch tag ( Hereinafter, tag ID2) is detected (step S12). Here, "within the predetermined range" means a range within which the RF-ID reader can detect the tag ID by wireless communication.
[0043]
Then, the RF-ID reader sends a detection signal for each portable item to the center system via the Internet (step S12). Each detection signal includes the detected tag ID and the reader ID of the RF-ID reader. Instead of transmitting the reader ID from the RF-ID reader to the center system, the center system may add the reader ID to the received tag ID from the address of the RF-ID reader that transmitted the tag ID. .
[0044]
The center system that has received the detection signal adds a time stamp to each detection signal, and stores the time stamp and the reader ID in the storage device in association with each tag ID (step S13). That is, information on the time stamp and the reader ID for the tag ID 1 corresponding to the portable item and information on the time stamp and the reader ID for the tag ID 2 corresponding to the portable item with a watch tag are stored.
[0045]
The center system checks whether the tag ID1 and the tag ID2 are detected from the same RF-ID reader within a time that can be regarded as simultaneous. This processing is executed as follows, for example. The center system stores tag ID1 and tag ID2 in association with each other in advance. When it is determined that one of the tag IDs 1 and 2 has been received, the tag ID is stored in correspondence with the tag ID 1 by using the time stamp and the reader ID corresponding to the tag ID 2 stored at that time. The information is searched, and information having the same time stamp as the time stamp corresponding to the tag ID 2 or within a predetermined range (time within this range is referred to as “time that can be regarded as simultaneous”) and the reader ID Check if there is. If such information is present, it is determined that tag ID1 and tag ID2 have been detected from the same RF-ID reader within a time that can be regarded as simultaneous, and the holder has the belongings, and loss has occurred. It is determined that it has not been performed (Yes in step S14).
[0046]
When it is determined that the tag ID1 and the tag ID2 are not simultaneously detected from the same RF-ID reader (No in step S14), the holder holds the carryable article and the carryable article with the watch tag together. It is not considered to be. That is, since it is considered that the holder lost the belongings, the center system contacts the contact registered for tag ID1 (step S15). This notification may be sent by e-mail to the holder's PC or mobile terminal, or a predetermined voice message may be played by calling the holder's mobile phone or PHS.
[0047]
If a large number of RF-ID readers are arranged, the holder can recognize that the belongings have left their own body in a short time after leaving their own body. Can help prevent loss.
[0048]
Further, after the lost item is lost, it is possible to grasp the current position and the moving route of the item in the same manner as in the first embodiment.
[0049]
In the above embodiment, when two RF-ID tags are not simultaneously detected by one RF-ID reader, the holder is notified. However, two RF-ID tags are simultaneously detected by two separate RF-ID readers. -When the ID tag is detected, it may be determined that the belongings have been lost and the notification is performed.
[0050]
Further, in the above-described embodiment, the case where the holder holds the portable item with the RF-ID tag and the portable item with the watch tag one by one has been described. It is possible to hold a portable item and notify the holder when one or more of the plural portable items are lost by the same method as described above. Further, a plurality of carry-on items with a watch tag may be held.
[0051]
(Third embodiment)
Next, a third embodiment will be described. In the third embodiment, the separation of the portable item from the holder is detected by using a portable RF-ID reader carried by the holder instead of the RF-ID reader installed on the street.
[0052]
As shown in FIG. 8, the system configuration according to the third embodiment has a configuration in which a portable RF-ID reader 5 is connected to a center system 2 via a mobile wireless data network 6 and the Internet 4.
[0053]
The portable RF-ID reader 5 includes a reading unit 51 that reads a tag ID by wireless communication, a mobile communication device 52 that transmits a signal via the mobile communication network 6, a control device 53 that controls operation, It has a GPS device 54 for acquiring its own position information. The control device 53 has a storage function for storing a reader ID, data necessary for communication, and the like, and a display function for performing an alarm display and the like as necessary. In addition, the GPS device 54 can acquire time information together with the position information, and by using the time information, the portable RF-ID reader 5 gives a time stamp when the tag ID is detected.
[0054]
The configuration of the center system 2 is the same as in the first and second embodiments. The information to be stored is almost the same as that of the second embodiment, but the user individual information is different. FIG. 9 shows the user individual information stored in the center system 2 in the third embodiment, in which GPS position information is added to the information of the time stamp / reader ID and the information of the portable RF-ID reader. You. Also, as shown in FIG. 10, the tag ID of the RF-ID tag attached to the portable item is registered in the portable RF-ID reader.
[0055]
Next, the operation of the system according to the third embodiment will be described with reference to FIG. The holder of the portable item holds the portable RF-ID reader in addition to the portable item with the RF-ID tag attached. Since the RF-ID exists in the immediate vicinity of the portable RF-ID reader, the portable RF-ID reader uses the tag ID of the RF-ID tag attached to the portable item in a normal case where no loss has occurred. It detects and transmits a detection signal including the tag ID, the reader ID of the portable RF-ID reader, the GPS position information at that time, and a time stamp to the center system (step S31). The center system stores the time stamp, the reader ID, and the GPS position information in the storage device corresponding to the tag ID (step S32). Note that the center system may add a time stamp. Further, the time interval at which the above transmission is performed can be set in advance.
[0056]
On the other hand, the portable RF-ID reader periodically checks whether or not the tag ID of the RF-ID tag attached to the portable item held by the holder is detected (step S33). That is, the tag ID is detected, and it is checked at regular time intervals whether the tag ID is the same as the tag ID registered in advance.
[0057]
When the portable RF-ID reader has not detected the tag ID of the RF-ID tag attached to the portable item for a certain period of time, such as when the portable item has left the portable RF-ID (Yes in step S33). The portable RF-ID reader transmits a non-detection notification including the tag ID to the center system.
[0058]
Upon receiving the non-detection notification (step S34), the center system searches the tag ID included in the non-detection notification for information stored in association with the tag ID, and obtains GPS position information corresponding to the latest time stamp. Is acquired (step S35), and the GPS position information is converted into significant place information such as an address (step S36). This conversion can be performed, for example, by transmitting GPS location information to a separately provided map information server and receiving location information from the map information server, or by storing location information for the GPS location information in the center system. It can also be performed by preparing a stored database.
[0059]
Then, the center system obtains the contact information to the holder from the tag ID, notifies the holder of the alarm, notifies the holder of the location information, and outputs the alarm and the position information by the user terminal or the like (step S37). Since the center system acquires the position information immediately after receiving the non-detection notification, the position information is considered to be close to the place where the portable item is away from the holder, and the possibility of finding the portable item increases.
[0060]
Further, in the same manner as in the first embodiment, it is possible to acquire the latest or past positional information of a lost carrying item.
[0061]
In the above example, by checking whether or not the portable RF-ID reader detects a specific tag ID, it is determined whether or not the portable item has left the holder. The tag ID corresponding to the above-mentioned portable item is registered in the center system, and the portable item leaves the holder depending on whether or not the tag ID and the reader ID of the portable RF-ID reader are detected as a set. Or not.
[0062]
Further, even if a portable RF-ID reader without a GPS device is used, according to the above method, it is possible to detect whether or not a portable item has left the holder. Then, after determining that the portable item has left the holder, the latest position information and the past position information may be provided in the same manner as in the first embodiment. Further, in the above embodiment, the case where the holder holds one portable item with an RF-ID tag is described, but the holder holds a plurality of portable items with an RF-ID tag, and It is possible to notify the holder in the same manner as described above when one or more of the belongings is lost.
[0063]
It should be noted that the present invention is not limited to the embodiments described above, and various modifications and applications are possible within the scope of the claims.
[0064]
【The invention's effect】
As described above, according to the present invention, the holder is immediately notified that the carrying item has left the holder, so that the possibility of preventing the loss of the carrying item can be increased. Furthermore, since the location where the portable item has left the holder and the location of the portable item after the lost item can be provided, early detection of the lost item is possible.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining an outline of an embodiment (first to third embodiments) of the present invention.
FIG. 2 is a system configuration diagram according to the first embodiment.
FIG. 3 is a diagram showing user individual information stored in a center system 2 according to the first embodiment.
FIG. 4 is a diagram showing common information stored in a center system 2 according to the first embodiment.
FIG. 5 is a diagram for explaining an operation of the system according to the first embodiment.
FIG. 6 is a diagram illustrating a part of information stored in a center system 2 according to the second embodiment.
FIG. 7 is a diagram for explaining an operation of the system according to the second embodiment.
FIG. 8 is a system configuration diagram according to a third embodiment.
FIG. 9 is a diagram showing user individual information stored in a center system 2 according to the third embodiment.
FIG. 10 is a diagram illustrating information stored in a portable RF-ID reader according to the third embodiment.
FIG. 11 is a diagram for explaining an operation of the system according to the third embodiment.
[Explanation of symbols]
1 RF-ID reader
2 Center system
3 User terminal
4 Internet
5 Portable RF-ID reader
6 Mobile wireless data network
11 Reading unit
12 Communication device
13 Control device
51 Reading unit
52 Mobile communication device
53 control unit
54 GPS device

Claims (20)

A method of notifying that an object has left the object holder by using a plurality of wireless ID readers connected to the center device,
The center device includes a tag ID of a first wireless ID tag attached to a first object to be held by a holder and a tag of a second wireless ID tag to be attached to a second object to be held by the holder And determining whether or not to receive the ID within a time that can be regarded as simultaneous from one of the plurality of wireless ID readers,
A method, wherein the center device notifies the holder when the center device determines that the two tag IDs have not been received from one wireless ID reader within a time that can be regarded as simultaneous at the same time. The center device stores a tag ID of a second wireless ID tag in advance in association with a tag ID of the first wireless ID tag,
When receiving the tag ID of the first wireless ID tag from one wireless ID reader, the tag ID of the second wireless ID tag stored in association with the tag ID of the first wireless ID tag is used as the tag ID. The method according to claim 1, wherein the determination is performed by determining whether a signal is received from a wireless ID reader within a time that can be considered simultaneous. Upon receiving the tag ID, the center device stores the time stamp and the reader ID of the RF-ID reader that is the transmission source of the tag ID in association with the tag ID,
The time stamp and the reader ID stored in association with the tag ID of the first wireless ID tag are compared with the time stamp and the reader ID stored in association with the tag ID of the second wireless ID tag. The method according to claim 2, wherein the determination is made by the following. Upon receiving the tag ID, the center device stores the time stamp and the reader ID of the RF-ID reader that is the transmission source of the tag ID in association with the tag ID,
When it is determined that the two tag IDs have not been received from one wireless ID reader within a time that can be regarded as simultaneous, the two tag IDs are stored in correspondence with a predetermined one of the two tag IDs. 2. The method according to claim 1, wherein location information is notified to the holder based on a reader ID present. A method of notifying that an object has left the holder of the object,
When the portable wireless ID reader held by the holder does not detect the tag ID of the wireless ID tag attached to the object to be held by the holder, transmits a non-detection notification including the tag ID to the center device,
A method wherein a center device receives the non-detection notification and notifies the holder based on a tag ID included in the non-detection notification. A method of notifying that an object has left the holder of the object,
The center device stores in advance the tag ID of the wireless ID tag attached to the object to be held by the holder,
The center device notifies the holder based on the tag ID when the portable wireless ID reader held by the holder does not detect the tag ID and does not receive the tag ID. Method. The portable wireless ID reader includes a GPS device, and when the holder detects a tag ID of a wireless ID tag attached to an object to be held, the tag ID and a GPS position acquired by the GPS device are detected. Transmitting information and a time stamp to the center device,
The center device stores the time stamp and the GPS position information in association with the tag ID,
When the portable wireless ID reader does not detect the tag ID, the latest time in the time when the portable wireless ID reader has detected the tag ID using the stored time stamp and GPS position information. The method according to claim 5 or 6, wherein the position information in (1) is notified to the holder. A center device for notifying that a certain object has left the holder of the object by using a plurality of wireless ID readers arranged at a predetermined place,
The tag ID of the first wireless ID tag attached to the first object to be held by the holder and the tag ID of the second wireless ID tag to be attached to the second object to be held by the holder, Means for determining whether to receive within a time that can be regarded as simultaneous from one of the plurality of wireless ID readers,
Means for notifying the holder when it is determined that the two tag IDs have not been received from one wireless ID reader within a time that can be considered simultaneous at the same time. The center device includes means for storing a tag ID of a second wireless ID tag in advance in association with a tag ID of the first wireless ID tag,
When receiving the tag ID of the first wireless ID tag from one wireless ID reader, the tag ID of the second wireless ID tag stored in association with the tag ID of the first wireless ID tag is used as the tag ID. 9. The center apparatus according to claim 8, wherein the determination is performed by determining whether or not reception is performed within a time that can be regarded as simultaneous from one wireless ID reader. When the center device receives the tag ID, the center device has a unit for storing a time stamp and a reader ID of an RF-ID reader that is a transmission source of the tag ID in association with the tag ID,
The time stamp and the reader ID stored in association with the tag ID of the first wireless ID tag are compared with the time stamp and the reader ID stored in association with the tag ID of the second wireless ID tag. The center device according to claim 9, wherein the determination is performed by the following. Receiving the tag ID, storing a time stamp in association with the tag ID, and a reader ID of an RF-ID reader that is a transmission source of the tag ID;
When it is determined that the two tag IDs have not been received from one wireless ID reader within a time that can be regarded as simultaneous, the two tag IDs are stored in correspondence with a predetermined one of the two tag IDs. 9. The center apparatus according to claim 8, further comprising: means for notifying the holder of location information based on the reader ID. A center device for notifying that an object has left the holder of the object,
Non-detection notification including the tag ID from the portable wireless ID reader when the portable wireless ID reader held by the holder does not detect the tag ID of the wireless ID tag attached to the object to be held by the holder Means for receiving the
Means for notifying the holder based on the tag ID included in the non-detection notification. A center device for notifying that an object has left the holder of the object,
Means for storing in advance a tag ID of a wireless ID tag attached to an object to be held by the holder;
Means for notifying the holder based on the tag ID when the portable wireless ID reader held by the holder does not detect the tag ID and does not receive the tag ID. Center equipment. The portable wireless ID reader includes a GPS device, and when the holder detects a tag ID of a wireless ID tag attached to an object to be held, the tag ID and a GPS position acquired by the GPS device are detected. Transmitting information and a time stamp to the center device,
A center device for storing the time stamp and the GPS position information in association with the tag ID;
When the portable wireless ID reader does not detect the tag ID, the latest time in the time when the portable wireless ID reader has detected the tag ID using the stored time stamp and GPS position information. The center device according to claim 12, further comprising: a unit configured to notify the holder of the position information of the center. A program that causes a computer to execute a process to notify that an object has left the holder of the object by using a plurality of wireless ID readers arranged in a predetermined place,
The tag ID of the first wireless ID tag attached to the first object to be held by the holder and the tag ID of the second wireless ID tag to be attached to the second object to be held by the holder, A step of determining whether or not to receive within a time that can be regarded as simultaneous from one of the plurality of wireless ID readers;
A step of notifying the holder when it is determined that the two tag IDs have not been received from one wireless ID reader within a time that can be considered simultaneous at the same time. When the tag ID of the first wireless ID tag is received from one wireless ID reader, the tag ID of the second wireless ID tag stored in association with the tag ID of the first wireless ID tag is used as the tag ID. 16. The program according to claim 15, wherein the determination is performed by determining whether or not reception is performed within a time that can be regarded as simultaneous from one wireless ID reader. Receiving the tag ID, storing a time stamp in association with the tag ID, and a reader ID of an RF-ID reader that is a transmission source of the tag ID;
When it is determined that the two tag IDs have not been received from one wireless ID reader within a time that can be regarded as simultaneous, the two tag IDs are stored in correspondence with a predetermined one of the two tag IDs. And causing the computer to execute a step of notifying the holder of the position information based on the reader ID. A program that causes a computer to execute a process for notifying that an object has left the holder of the object,
When the portable wireless ID reader held by the holder does not detect the tag ID of the wireless ID tag attached to the object to be held by the holder, the portable wireless ID reader does not detect the tag ID including the tag ID. Instructions for receiving notifications,
Sending a notification to the holder based on the tag ID included in the non-detection notification. A program that causes a computer to execute a process for notifying that an object has left the holder of the object,
A procedure for storing in advance the tag ID of the wireless ID tag attached to the object to be held by the holder;
A step of notifying the holder based on the tag ID when the portable wireless ID reader held by the holder does not detect the tag ID and does not receive the tag ID. A computer-readable recording medium on which the program according to any one of claims 15 to 19 is recorded.

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