JP6149894B2 - Position information processing apparatus and program, position information processing system, and position information processing method - Google Patents

Description

  The present invention relates to a position information processing apparatus and program, a position information processing system, and a position information processing method, and can be applied to, for example, a system that manages the position of a distribution process for an article such as an automobile (four-wheel automobile).

  In the distribution process from the shipment of automobiles assembled and completed at the factory (hereinafter also referred to as “completed vehicles”) to delivery to the dealers, at the relay sites (eg, harbors), there are vast motor pools etc. Completed vehicles are arranged side by side on the site. A transporter (transporter) picks up a predetermined completed vehicle (for example, a complete vehicle with a slip corresponding to the book received by the transporter) from the motor pool and transports it to the next destination. (For example, it is carried in a carrier car or the like).

  At this time, it takes a great deal of labor for the transporter to search for a target completed vehicle (completed vehicle with a slip number assigned to the transporter) from a vast motor pool.

  Therefore, conventionally, there is a system described in Patent Document 1 as a system for assisting a transport worker to search for a target completed vehicle from a vast motor pool. In the system described in Patent Document 1, when a transporter who moves a completed vehicle in the motor pool parks the completed vehicle in the motor pool, a barcode attached to a slip for identifying the completed vehicle. And the positional information (for example, positional information measured by GPS (Global Positioning System) etc.) acquired at the terminal at that time is manually operated and linked. And in the system described in patent document 1, the position of the completed vehicle in a motor pool is tracked based on the positional information acquired with the above-mentioned terminal.

JP 2014-40317 A

  However, in the system described in Patent Document 1, when tracking the position information of a completed vehicle, a registration work by a transport worker occurs, so that a human error such as a terminal operation error (for example, registration omission) occurs. There is a fear. Moreover, since the system described in Patent Document 1 requires a registration work by the transporter every time the complete vehicle is moved, it is not only complicated but also reduces the work efficiency of the transporter itself. There is a fear.

  Therefore, there is provided a position information processing apparatus and program, a position information processing system, and a position information processing method capable of efficiently obtaining accurate position information on an article to be managed (for example, a complete vehicle arranged in a motor pool). It is desired.

According to a first aspect of the present invention, in a position information processing apparatus that acquires position information of a management target article provided with a wireless tag and executes predetermined processing, (1) wireless communication means capable of communicating with the wireless tag; 2) data acquisition means for acquiring data stored in the wireless tag using the wireless communication means; and (3) reception intensity of radio waves received from the wireless tag when the wireless communication means communicates with the wireless tag. (4) position information acquisition means for acquiring own position information when the data acquisition means acquires data from the wireless tag; and (5) the reception intensity acquisition means. (6) managing the managed article as a management state of either a stationary state or a tracking determination state based on a determination result of the determination unit; When the management state of the managed article is stationary, the management status of the managed article is tracked when the received intensity acquired by the received intensity acquisition unit is determined to be greater than or equal to the first threshold by the determining unit. When the management status of the managed article is in the tracking determination state, and the received intensity acquired by the received intensity acquiring means is determined to be less than the first threshold by the determining means, the managed article ( 7 ) after the management state of the managed object changes from the stationary state to the tracking determination state, the management state of the managed object continues the tracking determination state. are between, an information holding unit for holding the data acquired from the position information and the radio tag of said own the positional information acquisition unit acquires the position information held (8) the information holding means And a sending means for sending the section device.

According to a second aspect of the present invention, there is provided a position information processing program comprising: (1) the above-described wireless tag; (2) data acquisition means for acquiring data stored in the wireless tag using the wireless communication means, and (3) when the wireless communication means communicates with the wireless tag. Reception intensity acquisition means for acquiring the reception intensity of radio waves received from the wireless tag; and (4) position information acquisition means for acquiring own position information when the data acquisition means acquires data from the wireless tag; (5) determination means for determining the reception intensity acquired by the reception intensity acquisition means; and (6) whether the article to be managed is in a stationary state or a tracking determination state based on the determination result of the determination means. When the management state of the article to be managed is stationary, the reception intensity acquired by the reception intensity acquisition unit is determined to be greater than or equal to the first threshold by the determination unit. If the management state of the management target article is changed to the tracking determination state, and the management state of the management target article is the tracking determination state, the reception intensity acquired by the reception intensity acquisition unit is when it is determined that less than one threshold, and management means for changing the management status of the managed article in a quiescent state, (7) after the management state of the managed article is a tracking decision state from rest, the Information holding means for holding the position information acquisition means acquired by the position information acquisition means and the data acquired from the wireless tag while the management state of the managed article is in the tracking determination state ; 8 ) It is characterized by functioning as transmission means for transmitting the position information held by the information holding means to an external device.

According to a third aspect of the present invention, there is provided a wireless tag provided on a management target article, a position information processing apparatus that processes position information of the management target article provided with the wireless tag, and the management target from the position information processing apparatus. In a position information processing system including a position information management device that receives and manages position information of an article, the position information processing device according to the first aspect of the present invention is applied as the position information processing device. system.

According to a fourth aspect of the present invention, there is provided a wireless tag provided on a management target article, a position information processing apparatus that acquires position information of the management target article and executes predetermined processing, and the management target article from the position information processing apparatus. In a position information processing method performed by a position information processing system including a position information management apparatus that receives and manages information including the position information, (1) the position information processing apparatus includes wireless communication means, data acquisition means, and reception Intensity acquisition means, determination means, information holding means, and transmission means, (2) the wireless communication means can communicate with the wireless tag, and (3) the data acquisition means uses the wireless communication means. (4) The reception intensity acquisition means acquires the reception intensity of radio waves received from the wireless tag during communication between the wireless communication means and the wireless tag. (5) The position information acquisition means acquires its own position information when the data acquisition means acquires data from the wireless tag. (6) The determination means is acquired by the reception intensity acquisition means. (7) the management means manages the managed article as a management state of either a stationary state or a tracking determination state based on a determination result of the determination means, When the management state of the management target article is stationary, the management level of the management target article is tracked when the reception level acquired by the reception level acquisition unit is determined to be greater than or equal to the first threshold by the determination unit. And when the received intensity acquired by the received intensity acquisition means is determined to be less than the first threshold by the determining means when the management state of the managed article is the tracking determination state, Change the administrative state of the elephants article stationary, (8) the information holding means, after the management state of the managed article is a tracking decision state from rest, administrative state tracking determination in the managed article While the state continues, the position information acquisition unit holds the position information of itself and the data acquired from the wireless tag. ( 9 ) The transmission unit stores the position held by the information holding unit. Information is transmitted to an external device.

  According to the present invention, it is possible to provide a position information processing system that efficiently obtains accurate position information about an article to be managed.

It is the block diagram shown about the functional structure of the operating terminal which concerns on embodiment. It is the block diagram shown about the whole structure of the completion vehicle tracking system which concerns on embodiment. It is explanatory drawing shown about the structural example of the motor pool used with the completion vehicle tracking system which concerns on embodiment. It is the block diagram shown about the structural example of the positional information processed with the operating terminal which concerns on embodiment. It is explanatory drawing shown about the structural example of RF communication condition information hold | maintained with the operating terminal which concerns on embodiment. It is explanatory drawing (state transition diagram) shown about the transition of the management state of the completed vehicle (RF tag) managed by the operating terminal which concerns on embodiment. It is explanatory drawing shown about the positional relationship of RF tag and RFID reader which concern on embodiment. It is the flowchart shown about the example of operation | movement of the operating terminal (control part) which concerns on embodiment. It is explanatory drawing (the 1) shown about the positional relationship of RF tag and RFID reader which concern on the modification of embodiment. It is explanatory drawing (the 2) shown about the positional relationship of RF tag and RFID reader which concern on the modification of embodiment.

(A) Main Embodiment Hereinafter, an embodiment of a position information processing apparatus and program, a position information processing system, and a position information processing method according to the present invention will be described in detail with reference to the drawings. Below, the example which applied the position information processing system of this invention to the completion vehicle tracking system is demonstrated. Moreover, below, the example which applies the position information processing apparatus of this invention to an operation terminal is demonstrated.

(A-1) Configuration of Embodiment FIG. 2 is a block diagram showing the overall configuration of the complete vehicle tracking system 1 of this embodiment. FIG. 3 is an explanatory diagram showing a configuration example of the motor pool MP for parking the completed vehicle V, which is a position information acquisition target in the completed vehicle tracking system 1.

  The completed vehicle tracking system 1 is a system that processes position information related to the position of the completed vehicle V. Assume that the completed vehicle V is arranged side by side in a motor pool MP as shown in FIG. As shown in FIG. 3, the motor pool MP is a parking lot in which frame lines of parking spaces of vertical M vehicles × N horizontal vehicles are drawn in a lattice pattern on the ground. As an example, here, the parking space for one complete vehicle V is a rectangle of length (full width) 2.5 m × width (full length) 4.0 m. As an example, here, M = 40 units and N = 75 units. Then, the motor pool MP becomes a rectangle with a vertical dimension Y = 100 m (2.5 × 40 = 100 m) and a horizontal dimension X = 300 m (4.0 × 75 = 300 m) (a rectangle with an area of 30000 square meters). It is possible to park a maximum of 3000 (40 × 75 = 3000) complete vehicles V. Although the shape and size of the motor pool MP corresponding to the completed vehicle tracking system 1 are not limited, the motor pool is usually wide enough to park thousands of completed vehicles.

  That is, in the completed vehicle tracking system 1, it is required to acquire position information of a large number of completed vehicles V installed in the vast motor pool MP as described above and perform processing such as management.

  Next, each device constituting the completed vehicle tracking system 1 will be described with reference to FIG.

  In the completed vehicle tracking system 1, an RF tag T attached to each completed vehicle V, an operation terminal 10, an RFID reader 20, and a location information management server 30 are arranged.

  The operation terminal 10 and the RFID reader 20 are terminals possessed by a transport worker U who picks up and moves (drives and moves) each completed vehicle V.

  The RFID reader 20 functions as a wireless communication unit that communicates with the RF tag T and supplies the read data to the operation terminal 10. Then, the operation terminal 10 obtains positional information of each completed vehicle V (each RF tag T) based on the data of the RF tag T supplied from the RFID reader 20 and the communication status between the RFID reader 20 and the RF tag T. The acquired position information is transmitted (uploaded) to the position information management server 30. As described above, the operation terminal 10 acquires the position information of the position of the completed vehicle V parked in the motor pool MP (the position of the RF tag T attached to each completed vehicle V) and stores it in the position information management server 30. Send.

  In the example of this embodiment, it is assumed that the power of the radio wave transmitted from the RFID reader 20 to the RF tag T is 250 mW. This is because it is assumed that the RFID reader 20 is used as a specific low-power radio station (a radio station that does not require application as a radio wave usage fee, a license station, or a registration station). If it is desired to extend the communicable distance between the RFID reader 20 and the RF tag T, the RFID reader 20 may be a local radio station, and the power of the transmission radio wave may be used at 1 W or less.

  In addition, it is not limited about the form in which the conveyance worker U carries the RFID reader 20 and the operation terminal 10. For example, the RFID reader 20 and the operation terminal 10 may be put in a pocket of the clothes of the transport worker U, or may be suspended from the neck of the transport worker U by a strap or the like. Further, in the completed vehicle tracking system 1, the number of sets of the RFID reader 20 and the operation terminal 10 (transportation worker U) is not limited, and it is natural that a plurality of sets may be arranged. In other words, it is desirable that all transport workers U who drive and move the completed vehicle V in the motor pool MP have the RFID reader 20 and the operation terminal 10.

  Further, the communication means and the communication path between the operation terminal 10 and the location information management server 30 are not limited. In the example of this embodiment, as shown in FIG. 2, the operation terminal 10 accesses the Internet N via a wireless LAN access point 40. The operation terminal 10 will be described as communicating with the location information management server 30 connected to the Internet N via the Internet N.

  A communication protocol for transmitting data to the location information management server 30 by the operation terminal 10 is not limited. For example, HTTPS / HTTP (Hypertext Transfer Protocol Secure / Hypertext Transfer Protocol), SMTP (Simple Mail Transfer Protocol), and the like. Various data transmission protocols may be applied.

  For example, the position information management server 30 may be realized by installing a program for receiving and processing position information on various PCs or workstations. In the completed vehicle tracking system 1, the number of operation terminals 10 and RFID readers 20 carried by the transporter U and the number of position information management servers 30 are not limited. As long as communication with the operation terminal 10 is possible, the network to which the location information management server 30 is connected is not limited to the Internet N, and may be a local network that is not connected to the Internet N. Further, in this embodiment, the position information management server 30 is described as receiving position information from the operation terminal 10 on one motor pool MP. Position information may be received from the operation terminal 10 of the motor pool MP and managed. When the position information is indicated by GPS coordinates, the position information is a unique value on the earth. Therefore, even if position information is received from the operation terminals 10 of the plurality of motor pools MP, the position information management server 30 The position information of which motor pool MP can be easily grasped.

  Further, the position information management server 30 distributes the latest position information of each completed vehicle V (RF tag T) in the motor pool MP to the operation terminal 10 based on the position information collected from each operation terminal 10. It may be. Then, each operation terminal 10 may present the latest position information of each completed vehicle V (RF tag T) distributed from the position information management server 30 to each transport worker U. As a result, the transport operator U can know the position of the desired completed vehicle V (the completed vehicle V in charge of transport) from the motor pool MP, so that the desired completed vehicle V can be picked up easily. be able to. In the following description, the processing configuration in which each operation terminal 10 collects position information with the completed vehicle V (RF tag T) will be mainly described, and the position information management server 30 distributes the position information to each operation terminal 10 to carry the work. The detailed description of the configuration presented to the person U will be omitted. For example, the technology described in Patent Literature 1 can be applied to the configuration in which the location information management server 30 delivers location information to each operation terminal 10 and presents it to the transport worker U.

  Next, the positioning of the RF tag T in each completed vehicle V will be described.

  A slip R is affixed to the inside of each completed vehicle V (for example, a front window portion or the like). Each completed vehicle V is put in the distribution process after the slip R is attached.

  Then, as shown in FIG. 2, an RF tag T is attached to each slip R. In the RF tag T, data related to the completed vehicle V corresponding to the slip R is recorded. The content of data recorded on the RF tag T is not limited, but if the data recorded on the RF tag T is completely unique, the location information management server 30 side Data related to the completed vehicle V may be managed in association with each other. This time, it is assumed that ID information (identification information corresponding to the slip R) of the completed vehicle V is recorded on the RF tag T. The ID information is assumed to be a character string composed of a plurality of characters (for example, characters such as numerals and alphabets). In addition to the ID information, other information (for example, model, option configuration, body color, transport destination information, etc.) may be recorded on the RF tag T. In this embodiment, as the RF tag T, a passive RF tag (RFID (Radio Frequency Identifier) type wireless tag) that operates using radio waves from the RFID reader 20 as an electromotive force (energy source) will be described. To do. Although the description content of the slip R is not limited, in this embodiment, at least the ID information of the completed vehicle V corresponding to the slip R and the barcode indicating the ID information are described in the slip R. Will be described. For example, in the slip R shown in FIG. 2, a character string “123456-ABC” is described as the ID information of the completed vehicle V. Therefore, at least ID information “123456-ABC” is recorded in the RF tag T attached to the slip R.

  Further, the shape of the RF tag T and the method of pasting on the slip R are not limited, but in this embodiment, the RF tag T is a seal type and pasted on the slip R by an adhesive surface. Shall.

  Next, a functional configuration of the operation terminal 10 will be described.

  FIG. 1 is a block diagram showing a functional configuration of the operation terminal 10.

  The operation terminal 10 includes a control unit 11, a time output unit 12, an RFID reader control unit 13, a position information positioning unit 14, a temporary storage area unit 15, and an information input / output unit 16.

  For example, the operation terminal 10 may be configured by installing a program (a program including the position information processing program of the embodiment) in a general-purpose information terminal such as a smart phone.

  The control unit 11 has a function of performing overall control (control of each component) of the operation terminal 10.

  The RFID reader control unit 13 functions as an interface for communicating with the RFID reader 20. The RFID reader control unit 13 communicates with the RFID reader 20 according to the control of the control unit 11 to control the RFID reader 20, and executes communication with the RF tag T (control such as data reading). The communication interface applied to the RFID reader controller 13 is not limited. For example, a specific low-power radio such as Bluetooth (registered trademark) or a wireless LAN may be used, or a wired connection such as USB may be used. You may do it. In this embodiment, the operation terminal 10 and the RFID reader 20 are separate devices, but the operation terminal 10 and the RFID reader 20 may be configured as an integrated device. When the RFID reader control unit 13 controls the RFID reader 20 to acquire ID information from the RF tag T, the reception intensity of the radio wave when the ID information is acquired (the radio wave received by the RFID reader 20 from the RF tag T). The value of (Reception strength) is also acquired. Specifically, the RFID reader control unit 13 acquires an RSSI (Received Signal Strength Indication) value as the reception intensity (electric field intensity) of the radio wave received by the RFID reader 20 from the RF tag T. As described above, the RFID reader 20 also functions as a reception intensity acquisition unit that acquires the reception intensity of radio waves received from the RF tag T.

  The position information positioning unit 14 has a function of acquiring (positioning) the position information of the operation terminal 10. Although the specific means for the position information positioning unit 14 to acquire the position information of the operation terminal 10 is not limited, in this embodiment, the position is measured using GPS, and the position information ( Information on coordinates expressed by latitude and longitude) is acquired. That is, it is assumed that the position information positioning unit 14 measures the position of the operation terminal 10 by receiving radio waves from an artificial satellite that constitutes the GPS. In addition to GPS, the position information positioning unit 14 may be configured to acquire position information obtained by measuring the position of the own apparatus by other means such as IMES (Indoor Messaging System), iBeacon, wireless LAN, and RF tag. It may be.

  The time output unit 12 has a function of acquiring and outputting the current time (time information). The time information output from the time output unit 12 is used as a time stamp of data recorded in the temporary storage area unit 15 or the like. The method of acquiring the time by the time output unit 12 is not limited. For example, it may be acquired from a satellite such as GPS, an NTP (Network Time Protocol) server on the Internet N, or an internal clock. You may make it acquire with a function.

  The temporary storage area unit 15 has a function of storage means (position information holding means) for storing (holding) position information of the RF tag T (each completed vehicle V). The temporary storage area unit 15 receives position information from the control unit 11 and stores it. The temporary storage area unit 15 stores position information of the RF tag T (each completed vehicle V) for each time series. A specific configuration of the position information will be described later. The temporary storage area unit 15 is assumed to be composed of a nonvolatile memory (for example, a data recording medium such as a flash memory).

  The information input / output unit 16 functions as a network interface (transmission unit) that communicates with an external device such as the location information management server 30. In this embodiment, the information input / output unit 16 is described as supporting at least a wireless LAN interface for connecting to the access point 40. As long as the connection to the location information management server 30 is possible, the communication method supported by the information input / output unit 16 is not limited. For example, as the information input / output unit 16, in addition to a wireless LAN, a network for a mobile phone terminal of a communication carrier (for example, a 3G network (third generation mobile phone communication network), an LTE (Long Term Evolution) network, a PHS, etc. You may make it apply the communication interface connected to (Personal Handy-Phone System) network etc.). The information input / output unit 16 may include a plurality of communication media. For example, the information input / output unit 16 may include both a wireless LAN interface and an interface connected to a mobile phone communication network. In the operation terminal 10, when the information input / output unit 16 supports a plurality of communication media, the control unit 11 selects one of the corresponding communication media by the information input / output unit 16 to perform communication with the outside.

  Next, details of position information processing performed by the control unit 11 will be described.

  The control unit 11 controls the RFID reader 20 via the RFID reader control unit 13 and performs processing such as data acquisition including ID information from the RF tag T. In addition, every time the ID information of the RF tag T is acquired, the control unit 11 controls the position information positioning unit 14 to acquire the current position information of the operation terminal 10 and further controls the time output unit 12. Get the current time stamp (current time). Then, the control unit 11 adds additional information to the acquired position information and stores it in the temporary storage area unit 15.

  FIG. 4 shows a configuration example of position information (position information to which additional information is added) stored in the temporary storage area unit 15. As shown in FIG. 4, additional information including ID information, a time stamp (time when ID information is acquired), and an RSSI value (reception intensity of a radio wave received when ID information is acquired) is added to the temporary storage area unit 15. The registered position information is registered. In other words, the temporary storage area unit 15 stores ID information acquired by the operation terminal 10 for each time series and position information of the position where the ID information is acquired. Note that the RSSI value may be excluded from the additional information. Moreover, you may make it add the information of another item to additional information. For example, in addition to the ID information, other information (for example, model, optional configuration, body color, transport destination information) other than the ID information is recorded on the RF tag T. Other information may also be included in the additional information.

  The control unit 11 communicates with the position information management server 30 using the information input / output unit 16 and includes the position information temporarily stored in the temporary storage area unit 15 (including additional information added to the position information). ) Is acquired and transmitted (uploaded) to the location information management server 30. Then, the control unit 11 performs processing for deleting the position information transmitted to the position information management server 30 from the temporary storage area unit 15. The timing at which the control unit 11 transmits the location information to the location information management server 30 is not limited. For example, the timing at which the control unit 11 can communicate with the location information management server 30 using the information input / output unit 16 (for example, The timing at which access to the access point 40 becomes possible. In addition, when the position information is acquired during a period in which the control unit 11 can communicate with the position information management server 30 using the information input / output unit 16, the position information management is performed immediately after the position information is acquired and recorded in the temporary storage area unit 15. You may make it transmit to the server 30. FIG.

  Next, details of processing in which the control unit 11 controls the RFID reader 20 via the RFID reader control unit 13 and communicates with the RF tag T attached to the completed vehicle V of the motor pool MP will be described.

  The RFID reader control unit 13 holds RF communication condition information 111 in which parameters related to communication conditions by the RFID reader 20 are set, and controls the RFID reader 20 according to the RF communication condition information 111.

  FIG. 5 is an explanatory diagram showing a configuration example of the RF communication condition information 111.

  The RF communication condition information 111 shown in FIG. 5 includes information on items of RFID transmission output, RFID transmission interval, RFID transmission time, first tracking determination threshold T1, and second tracking determination threshold T2.

  The RFID transmission output indicates the power (power) of a radio wave that is generated when the RFID reader 20 searches for a surrounding (nearby) RF tag T and communicates (activates the RF tag T). In this embodiment, it is assumed that the RFID transmission output is set to 250 [mW].

  The RFID transmission interval and the RFID transmission time are parameters for causing the RFID reader 20 to transmit (release) a radio wave (power radio wave corresponding to the RFID transmission output value) that searches the RF tag T intermittently. The control unit 11 transmits (releases) radio waves for searching for the RF tag T continuously during the RFID transmission time at every RFID transmission interval. In the example of this embodiment, as shown in FIG. 5, it is assumed that the RFID transmission interval is set to 6 seconds and the RFID transmission time is set to 2 seconds. That is, in the example of this embodiment, the control unit 11 performs an intermittent process in which the RFID reader 20 transmits (releases) radio waves continuously for 2 seconds and then waits for 6 seconds (waits without transmitting radio waves). Let it run repeatedly. When there is an RF tag T that responds to radio waves transmitted (released) by the RFID reader 20, the RFID reader 20 acquires ID information of the RF tag T and supplies it to the operation terminal 10 (control unit 11). To do. Further, the RFID reader 20 measures the RSSI value (reception intensity) of the radio wave received from the RF tag T, and supplies it to the operation terminal 10 (control unit 11) together with the data acquired from the RF tag T.

  In this embodiment, the control unit 11 is stationary or moves for each RF tag T (completed vehicle V) based on the RSSI value history (reception strength history) of each RF tag T (ID information). Judge whether it is. And the control part 11 performs the process which acquires the positional information on the said RF tag T, only when the RF tag T (completed vehicle V) determined to be moving responds to the radio wave transmission of the RFID reader 20. Do. In other words, for the RF tag T (completed vehicle V) that is determined to be stationary, the control unit 11 prepares (standby) a position tracking determination process (position information acquisition process) and moves. For the RF tag T (completed vehicle V) that is determined as follows, a tracking determination process (position information acquisition process) is executed.

  Specifically, the control unit 11 of this embodiment is in a state where the RF tag T (completed vehicle V) communicated in the past is stationary and prepares for position tracking determination processing (hereinafter referred to as “preparation state”). Called), or in a state where it is moving or ready for movement (it does not necessarily need to move), and a state that requires processing for tracking position tracking (hereinafter referred to as “tracking determination state”). To perform management (processing by the management means). Hereinafter, the state of each RF tag T (completed vehicle V) managed based on the result determined by the control unit 11 is also referred to as “management state”. In this embodiment, the control unit 11 is described as managing each RF tag T (completed vehicle V) as a management state of either the preparation state or the tracking determination state. The tag T (completed vehicle V) may be managed simply as “still state” or “moving state”, and position information acquisition processing corresponding to the state may be performed.

  Next, the state transition of each RF tag T (completed vehicle V) managed by the control unit 11 will be described.

  FIG. 6 is a diagram illustrating state transition of each RF tag T (completed vehicle V) managed by the control unit 11.

  As shown in FIG. 6, the control unit 11 initially manages each RF tag T (completed vehicle V) that has received the ID information as a “preparation state”. Thereafter, when it is determined that the RF tag T (completed vehicle V) whose management state is in the preparation state is moving (including preparation for movement), the RF tag T For (completed vehicle V), the management state is changed from the preparation state to the tracking determination state. After that, when it is determined that the RF tag T whose management state is the tracking determination state is stationary, the control unit 11 transitions the management state from the tracking determination state to the preparation state for the RF tag T. Let

  Specifically, the control unit 11 of this embodiment uses the first tracking determination threshold value T1 and the second tracking determination threshold value T2 registered in the RF communication condition information 111 to each RF tag T (completed vehicle). It is determined to change the management state of V). In this embodiment, as shown in FIG. 5, it is assumed that the first tracking determination threshold T1 = −60 [dBm] and the second tracking determination threshold T2 = −68 [dBm]. That is, the relationship is T1> T2.

  Next, a change in RSSI value (reception intensity) when the RFID reader 20 (operation terminal 10) receives radio waves from the RF tag T will be described.

  FIG. 7 is an explanatory diagram showing a communication state between the RFID reader 20 and the RF tag T.

  As described above, the RFID reader 20 and the operation terminal 10 are carried by the transport worker U who drives and moves the completed vehicle V. Therefore, when the completed vehicle V (RF tag T), which is a position information management object, moves, the transporter U enters the completed vehicle V and drives (driver's seat) as shown in FIG. Sit down and drive). On the other hand, the RF tag T with which the RFID reader 20 communicates is disposed in the completed vehicle V. That is, while the transporter U is outside the completed vehicle V, the body of the completed vehicle V (for example, a window glass or metal) is between the RFID reader 20 and the RF tag T as shown in FIG. While the transporter U is in the completed vehicle V, there is usually no shield that hardly transmits radio waves between the RFID reader 20 and the RF tag T. It becomes. Further, the distance between the RFID reader 20 and the RF tag T is usually greater when the transporter U is in the finished vehicle V and driving than when the transporter U is outside the vehicle. Get closer. Even if the RFID reader 20 is in the clothes of the transporter U, the clothes and the like are very radio waves compared to the body of the completed vehicle V (for example, a window glass or a metal door). Easy to pass through.

  As described above, when the transporter U enters the completed vehicle V and operates (sits on the driver's seat or the like), the RFID reader is more effective than when the transporter U is outside the complete vehicle V. It is clear that the RSSI value at the time of ID information acquisition by 20 tends to increase. Therefore, in this embodiment, the RSSI value at the time when the RFID reader 20 obtains the ID information is more in the case where the RF tag T (the completed vehicle V) is in the tracking determination state (the moving state) than in the case where it is in the ready state (the stationary state). It is assumed that the control unit 11 changes the management state of the RF tag T (completed vehicle V).

  Specifically, the control unit 11 monitors the RSSI value for each RF tag T (ID information). And the control part 11 makes a management state a tracking determination state (movement state) about RF tag T (completed vehicle V) by which RSSI value became more than 1st tracking determination threshold value T1.

  However, even if the RSSI value once becomes equal to or greater than the first tracking determination threshold value T1, depending on the situation in the completed vehicle V, the RSSI value may decrease. For example, when the space between the RF tag T and the RFID reader 20 is shielded by the body of the transporter U, the RSSI value may be somewhat reduced. For example, when the control unit 11 transitions the management state to the preparation state (stationary state) at a timing when it becomes less than the first tracking determination threshold value T1, the determination target RF tag T (completed vehicle V) is moving (RFID). Even when the leader 20 is in the completed vehicle V), there is a risk that the reader 20 may be erroneously shifted to the ready state (stationary state). If the first tracking determination threshold value T1 is too low, the control unit 11 determines that the tracking determination state (moving state) is present even when the transporter U (RFID reader 20) is outside the completed vehicle V. There is a fear.

  Therefore, in this embodiment, when the control unit 11 changes the management state from the tracking determination state (moving state) to the preparation state (stationary state) for the RF tag T (completed vehicle V), the first tracking is performed. It is assumed that a second tracking determination threshold T2 smaller than the determination threshold T1 is used. Thereby, in the control part 11, the misjudgment at the time of changing a management state from a tracking determination state (movement state) to a preparation state (stationary state) can be reduced, and a stable determination can be performed.

  As described above, the control unit 11 transitions the management state for each RF tag T (completed vehicle V), and the ID from the RF tag T (completed vehicle V) whose management state is the tracking determination state (moving state). When information is acquired, position information acquisition processing is performed.

  Next, the setting criteria for the first tracking determination threshold value T1 and the second tracking determination threshold value T2 will be described.

  As described above, the first tracking determination threshold T1 is a threshold used when the RF tag T (completed vehicle V) is transitioned from the preparation state (stationary state) to the tracking determination state (moving state). In this embodiment, the first tracking determination threshold T1 is set to −60 [dBm], but the transport worker U (the RFID reader 20 and the operation terminal 10) is located inside the completed vehicle V. And the specific value of the first tracking determination threshold T1 is not limited as long as it is a threshold that can distinguish the state in which the transport worker U (the RFID reader 20 and the operation terminal 10) is located outside the completed vehicle V. It is a thing.

  In addition, as described above, the second tracking determination threshold T2 is a threshold used when the RF tag T (completed vehicle V) is transitioned from the tracking determination state (moving state) to the preparation state (stationary state). As described above, the second tracking determination threshold value T2 is a reception intensity at a lower limit expected when the transport worker U (the RFID reader 20 and the operation terminal 10) is located inside the completed vehicle V. The specific value is not limited. In other words, the second tracking determination threshold value T2 decreases from the first tracking determination threshold value T1 in a state where the transport worker U (the RFID reader 20 and the operation terminal 10) is located inside the completed vehicle V. A specific value is not limited as long as it is a value obtained by subtracting an expected value. In this embodiment, the second tracking determination threshold T2 is set to −68 [dBm] obtained by subtracting 8 [dbm] from the first tracking determination threshold T1.

  As described above, in the completed vehicle tracking system 1, the control unit 11 controls the RFID reader 20 via the RFID reader control unit 13, thereby obtaining data from the RF tag T, and the RF tag. It functions as reception intensity acquisition means for acquiring the reception intensity of radio waves received from T. In the completed vehicle tracking system 1, the control unit 11 and the position information positioning unit 14 function as position information acquisition means for acquiring position information obtained by measuring the current position of the own device when data is acquired from the RF tag T. Furthermore, in the completed vehicle tracking system 1, the control unit 11 functions as a management unit that manages the state of each completed vehicle V (RF tag T). Furthermore, in the completed vehicle tracking system 1, the control unit 11 and the information input / output unit 16 function as a transmission unit that transmits position information to the position information management server 30 (position information management device).

(A-2) Operation | movement of embodiment Next, operation | movement (position information processing method of embodiment) of the completion vehicle tracking system 1 of this embodiment which has the above structures is demonstrated.

  FIG. 8 is a flowchart showing the operation of the operation terminal 10 (control unit 11).

  First, it is assumed that the power of the operation terminal 10 is turned on and the control unit 11 (position information processing program constituting the control unit 11) is started (S201).

  Next, the control unit 11 activates components such as the RFID reader control unit 13 (components including the time output unit 12, the position information positioning unit 14, the temporary storage area unit 15, and the information input / output unit 16). (S202).

  Next, the control unit 11 connects to the RFID reader 20 via the RFID reader control unit 13 and starts control of the RFID reader 20 (S203).

  Next, the control unit 11 controls the RFID reader 20 to continuously search (activate) the RF tag T during the RFID transmission time (2 seconds in this embodiment) set in the RF communication condition information 111. The radio wave to be transmitted is transmitted (S204). Here, if there is an RF tag T that responds to radio wave transmission from the RFID reader 20, the RFID reader 20 reads data including ID information from the RF tag T and receives the radio wave received from the RF tag T. Are supplied to the operation terminal 10 (control unit 11). On the control unit 11 side, it is possible to recognize that there is a response from the RF tag T based on the supply of ID information from the RFID reader 20.

  Next, the control unit 11 confirms the presence or absence of the RF tag T that responds to the radio wave transmission in step S204 (S205). If there is no tag T, the process proceeds to step S206 to be described later.

  When there is a responding RF tag T in step S204 described above, the control unit 11 checks the management state corresponding to the RF tag T (ID information) (S207). When the management state of the RF tag T is the tracking determination state, the control unit 11 proceeds to step S210 described later, and when the management state of the RF tag T is the preparation state, step S208 described later. Migrate to

  When the management state of the RF tag T is confirmed as the preparation state in the above-described step S207, the control unit 11 determines the reception intensity (RSSI value) of the radio wave received from the RF tag T in the above-described step S204. The first tracking determination threshold value T1 is compared (S208).

  When the reception intensity of the radio wave received from the RF tag T is determined to be greater than or equal to the first tracking determination threshold value T1 in step S208 described above, the control unit 11 determines that the RF tag T (ID information of the RF tag T) The management state corresponding to is shifted from the preparation state to the tracking determination state (S209), and the process proceeds to step S206 described later.

  On the other hand, when it is determined in step S208 described above that the reception intensity of the radio wave received from the RF tag T is less than the first tracking determination threshold T1, the control unit 11 determines that the RF tag T (the ID of the RF tag T The process shifts to step S206 to be described later while keeping the management state corresponding to (information) without changing the management state.

  When the management state of the RF tag T is confirmed as the tracking determination state in step S207 described above, the control unit 11 receives the reception intensity (RSSI value) of the radio wave received from the RF tag T and the first tracking determination. The threshold value T1 is compared (S210).

  When the reception intensity of the radio wave received from the RF tag T is determined to be greater than or equal to the first tracking determination threshold value T1 in step S210 described above, the control unit 11 proceeds to step S211 described later, and starts from the RF tag T. When it is determined that the received intensity of the received radio wave is less than the first tracking determination threshold value T1, the process proceeds to step S214 described later.

  When the reception intensity of the radio wave received from the RF tag T is determined to be greater than or equal to the first tracking determination threshold T1 in step S210 described above, the control unit 11 controls the position information positioning unit 14 to determine the current position. Position information is obtained by positioning, and the time output unit 12 is further controlled to obtain a time stamp (time information) of the current time. Then, the control unit 11 adds additional information (information including the ID information, time stamp, and RSSI value of the RF tag T) to the acquired position information and writes the additional information in the temporary storage area unit 15 (S211).

  Next, the control unit 11 transmits the position information written in the temporary storage area unit 15 to the position information management server 30 via the information input / output unit 16 (S212), and the position information is transmitted to the temporary storage area unit. 15 is erased (S213). And the control part 11 transfers to step S206 mentioned later.

  If the control unit 11 cannot communicate with the location information management server 30 via the information input / output unit 16 (for example, if the access point 40 cannot be accessed), the control unit 11 skips the processes of steps S212 and S213. Also good. Thereafter, when the control unit 11 can communicate with the location information management server 30, the location information recorded in the temporary storage area unit 15 is collectively transmitted to the location information management server 30, and the transmitted location information is displayed. It may be deleted from the temporary storage area unit 15.

  On the other hand, when it is determined in step S210 described above that the reception intensity of the radio wave received from the RF tag T is less than the first tracking determination threshold T1, the control unit 11 receives the radio wave reception intensity from the RF tag T. The (RSSI value) is compared with the second tracking determination threshold value T2 (S214).

  When it is determined in step S214 that the reception intensity of the radio wave received from the RF tag T is equal to or higher than the second tracking determination threshold value T2, the control unit 11 maintains the management state of the RF tag T in the tracking determination state. The process proceeds to step S211 described above.

  On the other hand, when it is determined in step S214 that the reception intensity of the radio wave received from the RF tag T is less than the second tracking determination threshold T2, the control unit 11 changes the management state of the RF tag T from the tracking determination state. The state is changed to the preparation state (S215), and the process proceeds to step S206 described later.

  In step S206, the control unit 11 waits for the RFID transmission interval set in the RF communication condition information 111, and then returns to the above-described step S204 to operate.

  Note that radio waves may be received multiple times from the same RF tag T during the RFID transmission time, but the above processing may be performed each time radio waves are received from the RF tag T, or during the RFID transmission time. Alternatively, the above-described processing may be performed with the average value or the maximum value of the reception intensity (RSSI) of the radio wave received from the RF tag T.

  Further, the control unit 11 does not perform the process of transmitting the temporary storage area information to the server in step S212, and does not delete the temporary storage area information in step S213, and when the transition from the tracking determination state in step S215 to the preparation state occurs, Only the latest position information stored in the temporary storage area may be transmitted to the server.

  Furthermore, the control unit 11 does not perform the processing of steps S211, S212, and S213 at the timing shown in FIG. It doesn't matter if you do. By doing in this way, position information positioning part 14 can perform position positioning using GPS easily.

(A-3) Effects of Embodiment According to this embodiment, the following effects can be achieved.

  In the completed vehicle tracking system 1, the passive RF tag T is used to automatically manage (track) the position information of the completed vehicle V without any human operation (such as a transporter U). it can. Thereby, the carrying worker U can have the RFID terminal 20 and the operation terminal 10 and can make the operation terminal 10 acquire position information reliably only by moving (driving) the completed vehicle V. In the prior art, when the position information is acquired, a conscious operation (barcode reading, etc.) by the transport worker U is required. Therefore, if an operation omission occurs by the transport worker U, the position information is surely updated. In some cases, location information cannot be managed accurately.

  Further, in the completed vehicle tracking system 1, the position information of each completed vehicle V is centrally managed by various terminals (terminals that can communicate directly or indirectly with the operation terminal 10) such as the position information management server 30. Can do.

  Further, the operation terminal 10 shifts the management state for each RF tag T (completed vehicle V), and acquires ID information from the RF tag T (completed vehicle V) whose management state is the tracking determination state (moving state). If so, position information acquisition processing is performed. Since the position information management server 30 only needs to be able to track the position of each RF tag T (completed vehicle V), it is less necessary to acquire position information in a ready state (stationary state) that does not involve movement. Accordingly, the operation terminal 10 acquires and processes the position information only for the RF tag T (completed vehicle V) that is in the tracking determination state (moving state) and transmits the position information to the position information management server 30. The number of position information can be reduced. When a large number of transport operators U (operation terminals 10) keep transmitting position information of a large number of RF tags T (finished vehicles V) to the position information management server 30 at all times within the site of the vast motor pool MP, the position information The load on the management server 30 and the network is also great. Therefore, like the operation terminal 10 of this embodiment, the load of the location information management server 30 and the network can be reduced by acquiring and transmitting only the location information necessary for the location information management server 30. In addition, the storage capacity required for the temporary storage area 15 of the operation terminal 10 can be reduced.

  Further, in the completed vehicle tracking system 1, additional information such as collected ID information (ID information of the RF tag T) and a time stamp is added to the position information (the additional information is linked) and managed. As a result, the completed vehicle tracking system 1 tracks the location of the completed vehicle V parked in the motor pool from the acquired position information, automates the receipt / reception of the completed vehicle V to / from the motor pool MP, and the completed vehicle. It is possible to improve work efficiency generated in the distribution process of the completed vehicle V, such as notifying the state by e-mail to a destination specified according to the state when the V moves.

(B) Other Embodiments The present invention is not limited to the above-described embodiments, and may include modified embodiments as exemplified below.

  (B-1) In the above embodiment, an example in which a seal type attached to the slip R is applied as the RF tag T has been shown, but the specific form of the RF tag T is not limited. For example, in the complete vehicle tracking system 1, an RF tag T that is casing of plastic or the like may be applied.

  (B-2) In the above embodiment, an example in which the position information processing apparatus and the position information processing system are applied to a complete vehicle tracking system has been described. However, in the position information processing apparatus and the position information processing system of the present invention, The target article (article to which the RF tag T is attached) is not limited to a completed vehicle, and position information of other articles may be processed (managed). For example, the position information processing apparatus and the position information processing system according to the present invention may be applied to processing of position information of a package transported by a forklift or processing of position information of a container transported by a crane.

  FIG. 9 shows an example in which the position information processing system according to the present invention is applied to the processing of position information of a load carried by a forklift.

  FIG. 9 shows an example in which the load L to be managed placed on the pallet PL is placed and the forklift F lifts and carries the load L together with the pallet PL. The luggage L is distributed along with the pallet PL, and is transported by the forklift F, for example, when loading on a truck or the like or when unloading from a truck or the like.

  When the forklift F transports the load L, the forklift F lifts the load L together with the pallet PL by inserting the lift arm F1 into the arm insertion hole PL1 of the pallet PL.

  In the example of FIG. 9, an RF tag T is attached to the arm insertion hole PL1 of the pallet PL, and an RFID reader 20 is attached to the tip of the lift arm F1. In addition, in the example of FIG. 9, illustration of the operation terminal 10 is abbreviate | omitted, However, You may make it mount in the forklift F main body, for example.

  FIG. 9A shows the positional relationship between the RF tag T and the RFID reader 20 when the luggage L (RF tag T) is in the preparation state (stationary state). FIG. 9B shows the positional relationship between the RF tag T and the RFID reader 20 when the package L (RF tag T) is in the tracking determination state (moving state).

  When the luggage L (RF tag T) is in the ready state, as shown in FIG. 9A, the lift arm F1 is not inserted into the arm insertion hole PL1. On the other hand, when the luggage L (RF tag T) is in the tracking determination state, the lift arm F1 is inserted into the arm insertion hole PL1, as shown in FIG. 9B. That is, the distance between the RF tag T and the RFID reader 20 is closer when the luggage L (RF tag T) is in the tracking determination state than when the luggage L (RF tag T) is in the ready state. . Therefore, the RSSI value measured by the RFID reader 20 tends to be larger when the package L (RF tag T) is in the tracking determination state than when the package L (RF tag T) is in the ready state. Therefore, in the example of FIG. 9, the first tracking determination threshold T1 and the second tracking determination that can determine the state of the package L (RF tag T) are included in the RF communication condition information 111 of the operation terminal 10 (control unit 11). If the threshold value T2 is set, the position information of the package L (RF tag T) can be acquired and transmitted to the position information management server 30 as in the above embodiment.

  FIG. 10 shows an example in which the position information processing system of the present invention is applied to processing of position information of a container transported by a crane.

  FIG. 10 shows an example in which a metal container CN is lifted and transported by a crane arm CA of a crane. In the distribution process, the container CN is transported by a crane (crane arm CA) when freight trains, trailers, harbor shipping, unloading, and the like.

  When carrying the container CN, the crane arm CA sandwiches and lifts the container CN from above.

  In the example of FIG. 10, the RF tag T is attached to the upper surface of the container CN, and the RFID reader 20 is attached to the crane arm CA. In addition, in the example of FIG. 10, illustration of the operation terminal 10 is abbreviate | omitted, However, You may make it mount in crane arm CA itself, for example.

  FIG. 10A shows the positional relationship between the RF tag T and the RFID reader 20 when the container CN (RF tag T) is in the ready state. FIG. 10B shows the positional relationship between the RF tag T and the RFID reader 20 when the container CN (RF tag T) is in the tracking determination state.

  When the container CN (RF tag T) is in the tracking determination state, as shown in FIG. 10B, the crane arm CA is in a state of sandwiching the container CN from above. At this time, it is desirable that the positions of the RFID reader 20 and the RF tag T are adjusted so that the RFID reader 20 on the crane arm CA side and the RF tag T on the container CN side face each other. Then, when the container CN (RF tag T) is in the tracking determination state, as shown in FIG. 10B, the RF tag T and the RFID reader 20 are connected to each other than when the container CN (RF tag T) is in the preparation state. It will be fixed at a very close distance.

  That is, the RSSI value measured by the RFID reader 20 tends to be larger when the container CN (RF tag T) is in the tracking determination state than when the container CN (RF tag T) is in the ready state. Therefore, in the example of FIG. 10, the first tracking determination threshold T1 and the second tracking determination that can determine the state of the container CN (RF tag T) are included in the RF communication condition information 111 of the operation terminal 10 (control unit 11). If the threshold value T2 is set, the position information of the container CN (RF tag T) can be acquired and transmitted to the position information management server 30 as in the above embodiment.

  (B-3) In each of the above embodiments, the control unit 11 uses each of the two threshold values (the first tracking determination threshold value T1 and the second tracking determination threshold value T2) to each RF tag T (completed vehicle V). However, the management state may be changed using only one threshold. Specifically, in each of the above embodiments, the management state is transitioned from the preparation state (stationary state) to the tracking determination state (movement state), and the tracking determination state (movement state) is changed to the preparation state (stationary state). A different threshold (first tracking determination threshold T1 or second tracking determination threshold T2) is used depending on the transition of the management state, but the first tracking determination threshold T1 is applied to the transition in both directions. Also good.

  DESCRIPTION OF SYMBOLS 1 ... Complete vehicle tracking system, MP ... Motor pool, V ... Complete vehicle, R ... Slip, T ... RF tag, U ... Transport worker, 10 ... Operation terminal, 11 ... Control part, 111 ... RF communication condition information, 12 DESCRIPTION OF SYMBOLS ... Time output part, 13 ... RFID reader control part, 14 ... Position information positioning part, 15 ... Temporary storage area part, 16 ... Information input / output part, 20 ... RFID reader, 30 ... Position information management server, 40 ... Access point.

Claims (9)

In a position information processing apparatus that acquires position information of a management target article provided with a wireless tag and executes predetermined processing,
A wireless communication means capable of communicating with the wireless tag;
Data acquisition means for acquiring data stored in the wireless tag using the wireless communication means;
A reception intensity acquisition means for acquiring a reception intensity of a radio wave received from the wireless tag when the wireless communication means communicates with the wireless tag;
Position information acquisition means for acquiring own position information when the data acquisition means acquires data from the wireless tag;
Determining means for determining the received strength acquired by the received strength acquiring means;
Based on the determination result of the determination means, the management target article is managed as a management state of either a stationary state or a tracking determination state, and the reception is performed when the management state of the management target article is a stationary state. When the determination means determines that the received intensity acquired by the intensity acquisition means is greater than or equal to the first threshold, the management state of the management target article is changed to a tracking determination state, and the management state of the management target article is a tracking determination state. In this case, if the reception intensity acquired by the reception intensity acquisition means is determined to be less than the first threshold by the determination means, a management means for changing the management state of the managed article to a stationary state,
The own position information acquired by the position information acquisition unit while the management state of the management target article continues the tracking determination state after the management state of the management target article is changed from the stationary state to the tracking determination state. And information holding means for holding data acquired from the wireless tag,
A position information processing apparatus comprising: transmission means for transmitting the position information held by the information holding means to an external device. The transmission means transmits only the latest information among the position information held by the information holding means to the external device,
The position information processing apparatus according to claim 1, wherein the information holding unit deletes the held position information after the transmission unit transmits the latest position information. The wireless communication means a predetermined time at predetermined intervals, transmits a radio wave to the wireless tag, according to claim 1 or 2, characterized in that it is possible to adjust the transmission interval value and the transmission time value of the waves Position information processing device. When the data acquisition means acquires data stored in the wireless tag, the maximum value of the reception intensity of the radio wave acquired by the reception intensity acquisition means during a transmission time for intermittently transmitting the radio wave to search for the radio tag Further comprising a maximum received strength calculating means for calculating
Said determination means position information processing apparatus according to claim 1, characterized in that a determination based on the maximum reception intensity calculated by the first threshold value and the maximum received intensity calculating means. When the data acquisition means acquires the data stored in the wireless tag, the average value of the reception intensity of the radio wave acquired by the reception intensity acquisition means during the transmission time for intermittently transmitting the radio wave to search for the radio tag A reception intensity average value calculating means for calculating
Said determination means position information processing apparatus according to claim 1, characterized in that a determination based on the reception intensity average value calculated by the first threshold value and the reception intensity average value calculation means. The managed article is an automobile, and the wireless tag is provided in the automobile,
The first threshold is a value corresponding to a plurality of automobiles ,
The position information processing apparatus according to claim 1 , wherein the position information processing apparatus is a management terminal for a parked vehicle. A computer installed in a position information processing apparatus that acquires position information of a management target article provided with a wireless tag and executes predetermined processing;
A wireless communication means capable of communicating with the wireless tag;
Data acquisition means for acquiring data stored in the wireless tag using the wireless communication means;
A reception intensity acquisition means for acquiring a reception intensity of a radio wave received from the wireless tag when the wireless communication means communicates with the wireless tag;
Position information acquisition means for acquiring own position information when the data acquisition means acquires data from the wireless tag;
A determination unit that determines the reception intensity acquired by the reception intensity acquisition unit; and the management target article is managed as a management state of either a stationary state or a tracking determination state based on a determination result of the determination unit. When the management status of the managed article is stationary, the management status of the managed article is tracked when the received intensity acquired by the received intensity acquiring means is determined to be greater than or equal to the first threshold by the determining means. When the management state of the article to be managed is changed to the determination state, and the reception intensity acquired by the reception intensity acquisition unit is determined to be less than the first threshold by the determination unit when the management state of the managed object is the tracking determination state, the management Management means for changing the management state of the target article to a stationary state;
After the management state of the managed object changes from the stationary state to the tracking determination state, the position information acquisition unit acquires the own position information while the management state of the managed object continues the tracking determination state. And information holding means for holding data acquired from the wireless tag,
A position information processing program that functions as a transmission unit that transmits the position information held by the information holding unit to an external device. A wireless tag provided on the managed article, a position information processing apparatus that processes position information of the managed article provided with the wireless tag, and position information on the managed article received from the position information processing apparatus. A position information processing system comprising a position information management apparatus that manages the position information management apparatus, wherein the position information processing apparatus according to any one of claims 1 to 6 is applied as the position information processing apparatus. A wireless tag provided on the management target article, a position information processing apparatus that acquires position information of the management target article and executes predetermined processing, and information including the position information of the management target article from the position information processing apparatus; In a position information processing method performed by a position information processing system including a position information management device that receives and manages,
The position information processing apparatus includes wireless communication means, data acquisition means, reception intensity acquisition means, position information acquisition means, determination means, management means, information holding means, and transmission means,
The wireless communication means can communicate with the wireless tag,
The data acquisition means acquires the data stored in the wireless tag using the wireless communication means,
The reception intensity acquisition means acquires the reception intensity of the radio wave received from the wireless tag during communication between the wireless communication means and the wireless tag,
The position information acquisition means acquires its own position information when the data acquisition means acquires data from the wireless tag,
The determination means determines the reception strength acquired by the reception strength acquisition means,
The management means manages the management target article as a management state of either a stationary state or a tracking determination state based on a determination result of the determination means, and the management state of the management target article is a stationary state. When the reception intensity acquired by the reception intensity acquisition unit is determined to be greater than or equal to the first threshold by the determination unit, the management state of the management target article is changed to a tracking determination state, and the management of the management target article is performed. When the reception intensity acquired by the reception intensity acquisition unit is determined to be less than the first threshold by the determination unit when the state is the tracking determination state, the management state of the managed article is changed to a stationary state,
The information holding means is acquired by the position information acquisition means while the management state of the management target article continues the tracking determination state after the management state of the management target article is changed from the stationary state to the tracking determination state . Holds its own location information and data acquired from the wireless tag,
The position information processing method, wherein the transmission means transmits the position information held by the information holding means to an external device.

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