JP2005020081A - Flow line observation system, flow line observation method, and flow line observation program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flow line observation system for detecting the position of a mobile body with high accuracy and capable of recognizing the moving history of each mobile body using the same transmitter without the need for particular processing in an observation area even when the same transmitter is repetitively used. <P>SOLUTION: The flow line observation system 1 includes a receiver information reception section 13 for receiving receiver information transmitted from a plurality of receivers located in an observation area 26 wherein a pedestrian 22 carrying the transmitter 21 moves via a communication network 25; a mobile body state storage section 15 having a state buffer denoting the candidate of a present position of the pedestrian 22; an environmental information storage section 17 for storing environmental information related to each detection area of a plurality of the receivers; a transmitter ID storage section 18 for storing transmitter ID management information ; and an event processing section 16 for updating the state buffer and the transmitter ID management information based on the receiver information and the environmental information to estimate the present position of the pedestrian 22. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flow line observation system, a flow line observation method, and a flow line observation program for estimating the position of a moving body moving within a certain observation area.
[0002]
[Prior art]
Conventionally, a plurality of receivers are installed in an area such as an event venue, and a pedestrian moving in the area has a transmitter to estimate the position of the pedestrian. The radio wave transmitted from the transmitter is detected by a receiver in the area, and each receiver transmits information obtained from the transmitter wirelessly or by wire to one position detection system. Thus, a position detection system and a position detection method capable of detecting the position of a moving object such as a pedestrian using a mobile communication system have been disclosed (for example, see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-178041 (page 5-6, FIG. 1)
[0004]
[Problems to be solved by the invention]
However, when installing a plurality of receivers at an event venue or the like, the receiver may detect the transmitter under unintended circumstances due to the wireless nature. For example, a nearby receiver may detect the transmitter's radio wave while the transmitter is being prepared at the reception before being carried by the event attendant or while being transported to the reception. . Originally, the radio wave of the transmitter should be allowed to be detected only when the event attendant carries it.
[0005]
There may also be situations where multiple receivers detect the same transmitter. For example, as shown in FIG. 16, it is assumed that a pedestrian 122 is watching in the exhibition room in a situation where the receiver 120a is installed in the exhibition room and the receiver 120b is installed in the adjacent passage. At this time, the transmitter 121 should be detected by the receiver 120a and the pedestrian 122 should be determined to exist in the detection area A. However, depending on the installation position and sensitivity setting of each receiver, both the receiver 120a and the receiver 120b detect the transmitter 121 carried by the pedestrian 122, and are based only on the movement history of the pedestrian and the positional relationship of the receiver. In the estimation algorithm, it may happen that the pedestrian 122 is determined to be present in the detection area B for which the receiver 120b is in charge.
[0006]
Furthermore, when a pedestrian 122a finishes the activity and returns the transmitter 121, when the other pedestrian 122b who newly arrives carries the transmitter 121, the movement history record by the transmitter 121 of the same ID is recorded. Because there is only one, it was difficult to distinguish the movement history of both. Conventionally, for example, it has been necessary to manage the portable time of the transmitter 121 for each pedestrian at the reception.
[0007]
In view of the above problems, the present invention accurately detects the position of a moving body and uses the same transmitter without any special processing in the observation area even if the same transmitter is used repeatedly. It is an object of the present invention to provide a flow line observation system, a flow line observation method, and a flow line observation program that can recognize the movement history of each moving body.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the first feature of the present invention is as follows. (A) Transmitter-specific transmission transmitted from a plurality of receivers arranged in an observation area where a mobile object carrying the transmitter moves. A receiver information receiving unit for receiving receiver information including a machine ID via a communication network; (b) a mobile state holding unit having a state buffer representing candidates for the current position of the mobile unit; (D) a transmitter ID holding unit for holding transmitter ID management information including the number of times the transmitter is used and the current usage status; E) A traffic line observation system including an event processing unit that updates a state buffer and transmitter ID management information based on receiver information and environment information and estimates a current position of a moving object. .
[0009]
Here, the “flow line” refers to the movement history of the moving object and can be expressed by a combination of a place and a time. The “observation start point” is a place where the flow line observation system starts observation, for example, an entrance of an exhibition hall. The “observation end point” is a place where the flow line observation system ends the observation, for example, an exit of the exhibition hall.
[0010]
According to the flow line observation system according to the first feature of the present invention, the position of the moving body is detected with high accuracy, and even if the same transmitter is used repeatedly, no special processing is performed in the observation area. The movement history of each moving body using the same transmitter can be recognized.
[0011]
The environment information in the flow line observation system according to the first feature includes role attributes of each detection area of the plurality of receivers, and the event processing unit refers to the environment information holding unit and the transmitter ID holding unit, If the current usage status of the transmitter is “not used” and the role attribute is “observation start point”, the usage status is updated to “used” and the current usage status of the transmitter is “used”. If the role attribute is “observation end point”, the usage status may be updated to “not used”, and if the usage status is “used”, the current position may be estimated. According to this flow line observation system, it is possible to observe the movement history from when the moving object passes through the observation start point until it passes through the observation end point. At this time, even if a plurality of moving bodies repeatedly use the same transmitter, the movement history for each moving body can be recognized.
[0012]
In addition, the event processing unit in the flow line observation system according to the first feature refers to the environment information holding unit and the transmitter ID holding unit, and updates the current usage status of the transmitter from “used” to “not used”. When adding, the value of the number of times of use for the transmitter is incremented by 1, and when the current usage status of the transmitter is updated from “not used” to “used”, the transmitter ID of the transmitter is based on the number of times of use. You may convert into transmitter ID decided uniquely. According to this flow line observation system, when multiple mobile units use the same transmitter, it has a transmitter ID that is uniquely determined for each number of uses, and recognizes the movement history of each mobile unit. can do.
[0013]
Furthermore, in the flow line observation system according to the first feature, the role attribute of the detection area of the receiver included in the environment information may be arbitrarily changed. For example, depending on the degree of congestion of the moving object in the observation area, it is possible to add an attribute in which a radio obstacle exists as a role attribute of the detection area.
[0014]
The second feature of the present invention is communication of receiver information including a transmitter-specific transmitter ID transmitted from a plurality of receivers arranged in an observation area where a mobile object carrying the transmitter moves. In a flow line observation system for receiving via a network, (a) a normal position buffer for storing a current position of a moving body based on receiver information and environmental information regarding each detection area of a plurality of receivers, and a moving body Is not present in the primary position buffer, the step of updating the state buffer corresponding to the transmitter ID having one or more sub-position buffers storing the next candidate position; The present invention is summarized as a flow line observation method including a step of estimating a current position.
[0015]
According to the flow line observation method according to the second feature, by referring to the environment information, the position of the moving body can be detected with high accuracy, and the flow line of the moving body can be observed without interruption.
[0016]
In the flow line observation method according to the second feature, the receiver information includes a detection flag indicating whether or not the receiver is detecting the transmitter, and the environment information is the movement within the observation area of the moving object. The step of updating the state buffer including route information indicating the order refers to the positional relationship between the detection areas when “arrival” is recognized based on the detection flag, and (c) the detection area of the receiver is in the state When direct access is possible from the area stored in the buffer and the normal position buffer is empty, the step of inputting the detection area of the receiver to the normal position buffer and (d) the detection area of the receiver is stored in the state buffer If the normal position buffer is not empty, refer to the route information, and the detection area of the receiver is the area next to the area stored in the normal position buffer. In this case, the value of the normal position buffer is moved to the sub position buffer, the detection area of the receiver is input to the normal position buffer, and (e) the detection area of the receiver is directly accessible from the area stored in the status buffer. Yes, if the normal position buffer is not empty, refer to the route information, and if the detection area of the receiver is not the area next to the area stored in the normal position buffer, input the detection area of the receiver to the sub position buffer. And a stage of performing. According to this flow line observation method, it is possible to estimate the existence position more reliably by referring to the environment information and the state buffer.
[0017]
Further, in the flow line observation method according to the second feature, the receiver information includes a detection flag indicating whether or not the receiver is detecting the transmitter, and the environment information includes each detection area of the plurality of receivers. The step of updating the state buffer, including the role attribute and the route information indicating the moving order of the moving object within the observation area, is performed when the “removal” is recognized based on the detection flag. Is the same as the area stored in the primary buffer, the value of the primary buffer is moved to the secondary buffer, the primary buffer is emptied, and (g) the receiver detection area is the secondary buffer. And the step of emptying the sub-position buffer when the role attribute includes the attribute that the radio wave obstacle exists. According to this flow line observation method, it is possible to estimate the existence position more reliably by referring to the environment information and the state buffer.
[0018]
According to a third aspect of the present invention, receiver information including a transmitter ID unique to a transmitter transmitted from a plurality of receivers arranged in an observation area in which a mobile object carrying the transmitter moves is communicated. In the flow line observation method for observing the flow line of a moving body using a flow line observation system that is received via a network, (a) the number of times the transmitter ID is used and the current use state held by the flow line observation system. A step of searching for a transmitter ID included in the receiver information from the transmitter ID management information included, and (b) a transmitter ID included in the receiver information in the transmitter ID management information is found, and the transmitter ID Is not currently in use and the environment information related to each detection area of multiple receivers held by the flow line observation system is referenced, and the role attribute of each detection area of multiple receivers included in the environmental information is Indicates "point" The transmitter ID management information is newly registered in the transmitter ID management information, and (c) the transmitter ID included in the receiver information is found in the transmitter ID management information, and the transmitter ID is If the role attribute is an attribute indicating “observation end point” that is currently in use, the gist of the present invention is a flow line observation method including a step of performing a process of ending the observation of the moving object.
[0019]
Here, “the process of ending the observation of the moving object” means not observing the transmitter but ending the observation of each moving object. For example, this process is performed when a moving body such as a pedestrian leaves the exhibition hall.
[0020]
According to the flow line observation method according to the third feature, even if the same transmitter is used repeatedly, the movement history of each mobile object using the same transmitter is obtained without performing special processing in the observation area. Can be recognized.
[0021]
In addition, the step of newly registering the flow line observation method according to the third feature includes the steps of (d) updating the current usage status of the transmitter ID to “use”, and (e) transmitting the transmitter ID. Based on the number of times the machine ID is used, the step of converting the transmitter ID into a uniquely determined transmitter ID, (f) the normal position buffer for storing the current position of the mobile object, and the mobile object does not exist in the normal position buffer, A step of newly creating a status buffer corresponding to the converted transmitter ID, having one or more sub-position buffers for storing the next candidate position. According to this flow line observation system, when multiple mobile units use the same transmitter, it has a transmitter ID that is uniquely determined for each number of uses, and recognizes the movement history of each mobile unit. can do.
[0022]
The step of performing the process of ending the observation of the moving body in the flow line observation method according to the third feature includes (g) updating the current usage status of the transmitter ID to “not used”, And a step of adding 1 to the value of the number of uses for the transmitter. According to this flow line observation method, the number of times the same transmitter is used can be recognized.
[0023]
The fourth feature of the present invention is communication of receiver information including a transmitter ID unique to a transmitter, which is transmitted from a plurality of receivers arranged in an observation area where a mobile object carrying the transmitter moves. In a flow line observation system that receives via a network, (a) a normal position buffer that stores the current position of a moving body based on receiver information and environmental information regarding each detection area of a plurality of receivers, and a moving body Is not present in the primary position buffer, a procedure for updating the state buffer corresponding to the transmitter ID having one or more sub-position buffers for storing the next candidate position; The gist of the present invention is a flow line observation program that executes a procedure for estimating the current position.
[0024]
In the flow line observation program according to the fourth feature, the receiver information includes a detection flag indicating whether or not the receiver is detecting the transmitter, and the environment information is the movement within the observation area of the moving object. The procedure for updating the state buffer including the route information indicating the order refers to the positional relationship between the detection areas when “arrival” is recognized based on the detection flag, and (c) the detection area of the receiver is in the state When direct access is possible from the area stored in the buffer and the normal position buffer is empty, the step of inputting the detection area of the receiver to the normal position buffer and (d) the detection area of the receiver is stored in the state buffer If the normal position buffer is not empty, refer to the route information and the receiver detection area is the area next to the area stored in the normal position buffer. In this case, the value of the normal position buffer is moved to the sub position buffer, the detection area of the receiver is input to the normal position buffer, and (e) the detection area of the receiver is directly accessible from the area stored in the status buffer. Yes, if the normal position buffer is not empty, refer to the route information, and if the detection area of the receiver is not the area next to the area stored in the normal position buffer, input the detection area of the receiver to the sub position buffer. And a stage of performing.
[0025]
In the flow line observation program according to the fourth feature, the receiver information includes a detection flag indicating whether or not the receiver is detecting the transmitter, and the environment information is information on each detection area of the plurality of receivers. The procedure for updating the status buffer including the route attribute indicating the role attribute and the moving order of the moving object within the observation area is as follows. When “leaving” is recognized based on the detection flag, (f) the detection area of the receiver Is the same as the area stored in the primary buffer, the value of the primary buffer is moved to the secondary buffer, the primary buffer is emptied, and (g) the receiver detection area is the secondary buffer. And the step of emptying the sub-position buffer when the role attribute includes the attribute that the radio wave obstacle exists.
[0026]
A fifth feature of the present invention is that communication is performed on receiver information including a transmitter ID unique to a transmitter, which is transmitted from a plurality of receivers arranged in an observation area in which a mobile object carrying the transmitter moves. The traffic line observation system that is received via the network includes (a) the transmission information included in the receiver information from the transmitter ID management information that the flow line observation system holds, including the number of times the transmitter ID is used and the current usage status. (B) The transmitter ID included in the receiver information is found in the transmitter ID management information, and the transmitter ID is not currently used and is retained by the flow line observation system. If the role attribute of each detection area of the plurality of receivers included in the environment information is an attribute indicating “observation start point” with reference to the environment information regarding each detection area of the plurality of receivers, the transmitter ID management information New transmitter ID And (c) an attribute indicating that the transmitter ID included in the movement event is found in the transmitter ID management information, the transmitter ID is currently in use, and the role attribute indicates “observation end point” In this case, the gist of the present invention is that it is a flow line observation program that executes a procedure for performing a process of ending the observation of a moving object.
[0027]
In addition, the procedure for newly registering the flow line observation program according to the fifth feature includes (e) updating the current use status of the transmitter ID to “use” and (f) transmitting the transmitter ID. Based on the number of times the machine ID is used, the step of converting the transmitter ID to a uniquely determined transmitter ID, (g) a normal position buffer for storing the current position of the mobile object, and the mobile object does not exist in the normal position buffer, A step of newly creating a status buffer corresponding to the converted transmitter ID, having one or more sub-position buffers for storing the next candidate position.
[0028]
In addition, the procedure for performing the process of ending the observation of the moving body of the flow line observation program according to the fifth feature includes (h) updating the current usage status of the transmitter ID to “unused”, And a step of adding 1 to the value of the number of uses for the transmitter.
[0029]
By reading the flow line observation program according to the fourth and fifth features of the present invention, it is possible to cause the flow line observation system or the like to execute the above procedure.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic.
[0031]
The flow line observation system according to the embodiment of the present invention is a system that always grasps the current position of a moving body such as a pedestrian moving in a certain observation area and observes the flow line of the moving body. Here, the “flow line” refers to the movement history of the moving object and can be expressed by a combination of a place and a time.
[0032]
(Receivers and transmitters in the observation area)
In the following, a system for observing a pedestrian's flow line will be described by taking a pedestrian moving in a certain observation area as an example of a moving body. The flow line observation system according to the embodiment of the present invention observes a flow line of a pedestrian 22 in a certain observation area 26 as shown in FIG. In the observation area 26, receivers 20a, 20b,..., 20e are installed for each of a plurality of areas whose positions are to be detected. On the other hand, the transmitter 21 is carried by the pedestrian 22 to be observed.
[0033]
Specifically, the transmitter 21 can use a wireless tag or the like. The wireless tag includes, for example, a so-called RF-ID (Radio Frequency Identification) or the like. As shown in FIG. 2, the wireless tag 30 has an identification information holding unit 31 that holds different IDs, and is held in the identification information holding unit 31 A transmission unit 32 that generates a transmission signal having a predetermined frequency corresponding to the ID that is set, and a transmission antenna 33 are provided. The transmission unit 32 generates a transmission signal corresponding to the ID held in the identification information holding unit 31 and transmits the transmission signal via the transmission antenna 33.
[0034]
The interval at which the wireless tag 30 transmits a signal corresponding to the ID is determined according to the moving speed of the pedestrian 22 and the arrangement interval of the receivers 20a, 20b, ..., 20e. For example, walking in a normal building If it moves by, it should be about once every few seconds. Alternatively, when moving in the hall by walking, the position of the pedestrian 22 is detected by narrowing the arrangement interval of the receivers 20a, 20b,..., 20e and shortening the interval of transmitting the transmission signal corresponding to the ID. Accuracy can be improved. The transmission interval can be adjusted by controlling the interval at which the transmission unit 32 transmits the transmission signal corresponding to the ID.
[0035]
On the other hand, each of the receivers 20a, 20b, ..., 20e also has a unique ID. The receivers 20a, 20b,..., 20e detect a transmission signal including an ID unique to the transmitter from the transmitter 21. The areas in which the receivers 20a, 20b,..., 20e detect transmission signals can be adjusted, and the range of areas A, B,. The receivers 20a, 20b,..., 20e send information related to detection of the transmitter 21 to the receiver information receiving unit 13 in the flow line observation system 1 via the communication network 25.
[0036]
Next, a method of processing information received by the receivers 20a, 20b, ..., 20e from the transmitter 21 will be described. The receivers 20a, 20b,..., 20e hold a list of information on transmitters (hereinafter referred to as “transmitter information”). As shown in FIG. 3, the transmitter information includes an ID (tag ID) of the transmitter, a detection flag indicating whether or not the current detection is being performed, and a counter indicating an elapsed time from the time when the detection flag is changed.
[0037]
When the receiver 20a, 20b,..., 20e detects a transmission signal from the transmitter 21, the receiver 20a searches the transmitter information list using the transmitter ID as a key. Transmitter information related to ID is newly created. For example, when the transmission signal of the transmitter 21 having the transmitter ID “XXX” is detected and the transmitter information is not in the list, the detection flag of the transmitter ID “XXX” is set to true, as shown in FIG. When the counter is set to 0, a list of transmitter ID “XXX” is newly created, and thereafter the counter is set to 0 every time transmitter information of transmitter ID “XXX” is detected, and the detection flag is false. In this case, the detection flag is changed to true. The receivers 20a, 20b,..., 20e check the table of FIG. 3 at a predetermined time interval t and add 1 to the counter for all transmitters. Further, the receivers 20a, 20b,..., 20e check the counter for the transmitter whose detection flag is true in the table of FIG. 3, and if this counter value exceeds a predetermined value cth, the detection flag is false. And the counter is set to 0. For example, the tag ID “YYY” in FIG. 3 shows a state immediately after the detection flag is changed to “false”, while the tag ID “ZZZ” shows 15 steps after the detection flag is changed to “false”. It shows that you are doing. That is, when the detection flag is true, it can be seen that the transmitter 21 corresponding to the transmitter ID is detected in the corresponding area. When the detection flag is false, it can be seen that the transmitter 21 corresponding to the transmitter ID has not been detected for the time indicated by the counter value in the corresponding area.
[0038]
Next, the timing at which the receivers 20a, 20b,..., 20e send information to the receiver information receiving unit 13 in the flow line observation system 1 via the network 25 will be described. The receivers 20a, 20b,..., 20e, for example, send the set of detection flag, receiver ID, and transmitter ID as “receiver information” to the receiver information receiving unit 13 in the following two types of cases. .
[0039]
1. When the detection flag changes to true
2. When the detection flag changes to false, or when a predetermined step cth has elapsed since the detection flag changed to false
The time point when the detection flag changes to true refers to the time point when the pedestrian 22 arrives at a certain area. The time when the detection flag changes to false indicates the time when the pedestrian 22 has left the area. The point in time when the predetermined step cth has elapsed since the detection flag has changed to false is the point in time when the pedestrian 22 can be surely left the area, not the fluctuation of the detection area or the crossing of radio waves. In order to reliably recognize the departure, it is preferable to regard the time when a predetermined step cth has elapsed after the detection flag has changed to false as the time of “leaving”. By this process, the flow line observation system 1 is notified of the arrival of a pedestrian in a certain area and the departure from the same area. If the information from all areas is integrated, the movement history of the pedestrian 22 in the observation area 26 can be obtained.
[0040]
(Configuration of flow line observation system)
As shown in FIG. 1, the flow line observation system 1 according to the embodiment of the present invention includes a plurality of receivers 20a, 20b arranged in an observation area 26 where a pedestrian 22 carrying a transmitter 21 moves. ..., a receiver information receiving unit 13 that receives the transmitter information including the transmitter ID unique to the transmitter, transmitted from 20e, via the communication network 25, and a state buffer that represents candidates for the current position of the pedestrian 22 And an environment information holding unit 17 that holds environment information including role attributes, route information, and positional relationships between the detection areas of the plurality of receivers 20a, 20b, ..., 20e. And a transmitter ID holding unit 18 for holding transmitter ID management information including the number of times the transmitter 21 is used and the current usage status, and a movement event in which time information is added to the receiver information. Based on the environment information, updates the status buffer and transmitter ID management information includes an event processing unit 16 to estimate the current position of the pedestrian 22. Furthermore, the flow line observation system 1 according to the embodiment of the present invention includes a recording event capturing unit 11, an external event capturing unit 12, and an input switching unit 14.
[0041]
The receiver information receiving unit 13 sends the receiver information sent from the receivers 20a, 20b,..., 20e in the observation area 26 via the communication network 25 to the external event capturing unit 12. As described above, “receiver information” is information including a detection flag, a receiver ID, and a transmitter ID.
[0042]
The external event capturing unit 12 adds time information to the receiver information transmitted from the receiver information receiving unit 13 and transmits it to the input switching unit 14. Here, what added time information to receiver information is called a "movement event."
[0043]
The recording event capturing unit 11 reads the movement event described in the recording file 5 and sends it to the input switching unit 14. The recording file 5 is a file that records past movement events, and may be stored in a recording medium such as an FD. In contrast to the external event capturing unit 12 capturing current information in the observation area 26, the recorded event capturing unit 11 captures past information in the observation area 26.
[0044]
The input switching unit 14 switches the movement event sent from the external event capturing unit 12 and the recording event capturing unit 11 according to the mode, and transmits it to the event processing unit 16. The flow line observation system 1 includes, for example, the following two operation modes.
[0045]
1. Monitor mode: Observe the current state in the observation area.
[0046]
2. Reproduction mode: Observe the situation at the time from the information in the observation area recorded in the past.
[0047]
The mode is switched via a user interface such as the input unit 9. Specifically, the input unit 9 indicates devices such as a keyboard and a mouse. When an input operation is performed from the input unit 9, corresponding key information is transmitted to the input switching unit 14.
[0048]
The moving body state holding unit 15 holds the current state and flow lines of all pedestrians 22. Specifically, the mobile unit information shown in FIG. 4 and the state buffer shown in FIG. 5 are provided. For example, as shown in FIG. 6, it has a detection area A by the receiver 20a, a detection area B by the receiver 20b, a detection area C by the receiver 20c, a detection area D by the receiver 20d, and a detection area E by the receiver 20e. Assume that a pedestrian has moved in the observation area 26. At this time, the moving body state holding unit 15 holds the moving body information for each transmitter ID from the information obtained from each receiver 20a, 20b, ..., 20e. In FIG. 4, the target transmitter 21 arrives at area C at 15:30 and stays for 30 minutes, then arrives at area A at 16:05 and stays for 10 minutes, then area D and area E. , It has moved to area B. FIG. 5 is a state buffer for estimating the current position of the current pedestrian 22, and includes a normal position buffer and at least one sub position buffer. The normal position buffer stores the current position of the pedestrian 22, and the sub position buffer stores the next candidate position when the pedestrian 22 does not exist in the normal position buffer. FIG. 5 shows that the target pedestrian is likely to exist in area B, but if it is not in area B, it may be present in area C. Further, the number of sub position buffers is not limited to one, and a plurality of sub position buffers can be held. In this case, candidate positions such as a normal position buffer, a first sub position buffer, a second sub position buffer,. When a plurality of sub-position buffers are provided in this manner, more current position candidates can be taken into consideration, and therefore more accurate estimation is possible. The moving body state holding unit 15 may use an internal storage device such as a RAM or an external storage device such as HD or FD.
[0049]
The environment information holding unit 17 holds environment information regarding the observation area 26. Here, the “observation area” refers to an area in which the flow line observation system according to the embodiment performs observation, and the “detection area” refers to each receiver 20a, 20b,. It refers to the area where the transmitter 21 can be detected. In the environment information, the role attribute of each detection area can be defined. Specifically, an area information table as shown in FIG. 7 is held for each detection area. The area ID is identification information unique to the detection area, and may be an integer from 1 to N (N is the total number of detection areas), for example. The area name is a character string representing the name of the detection area. The receiver ID is identification information of the receivers 20a, 20b,.
[0050]
The role code defines the role of the detection area, and an example thereof is shown in FIG. For example, when the role of the detection area is “entrance”, a value of 0x1 is used as the role code. In the case of having a plurality of roles, all codes are combined by OR operation. In FIG. 8, “entrance” refers to the entrance of the observation area 26, and “exit” refers to the exit of the observation area 26. The “passage” refers to a place in the observation area 26 that is used exclusively for movement, and is less likely to stay here. “Obstruction” indicates that there is a radio wave obstruction, and examples thereof include a case where a large machine is arranged in the detection area and a case where many people are crowded. This role code can be arbitrarily changed according to the situation.
[0051]
The route number stores a standard movement order (route) for each of the areas A to E in the observation area 26. This value is unique in all areas. The route number for an area not included in the route is -1. The number of accessible areas is the number of other areas that can be directly moved from the area. This is K. “Directly movable” means that no other area is routed along the way. The accessible area IDi (i = 1... K) is the i-th area ID that can be directly accessed from the area. The access distance i is a moving distance from the area to the accessible area IDi. This moving distance is represented by, for example, an actual moving distance from a receiver in the corresponding area to a receiver in the accessible area. Using these environmental information, the event processing unit 16 updates the information in the moving object state holding unit 15. The environment information holding unit 17 may use an internal storage device such as a RAM, or may use an external storage device such as an HD or an FD, like the moving body state holding unit 15.
[0052]
The transmitter ID holding unit 18 holds “transmitter ID management information” including the number of times of use related to the transmitter ID and the current usage status. Specifically, a transmitter ID management table as shown in FIG. The transmitter ID management table holds information including a transmitter ID, a use counter, and a use flag for all registered transmitters (L in FIG. 9A). The usage counter indicates how many times the corresponding transmitter has been used in the past. The use flag indicates whether or not the corresponding transmitter is currently in use. FIG. 9B shows an example in which actual values are stored in the transmitter ID management table. According to FIG. 9B, three transmitters are registered with L = 3. Here, the use flag “true” indicates that it is currently in use, and “false” indicates that it is not in use. For example, the transmitter with the transmitter ID “XXX” has been used once in the past and is currently in use for the second time. The transmitter with the transmitter ID “YYY” has never been used in the past, and is currently in use for the first time. The transmitter with the transmitter ID “ZZZ” has been used once in the past and is not currently used. The transmitter ID management table is updated by the event processing unit 16 as needed.
[0053]
The event processing unit 16 updates the information held in the moving body state holding unit 15 from the movement event, and estimates the position of the pedestrian. For this update process, the environment information held in the environment information holding unit 17 is used. The event processing unit 16 includes an event queue (queue), and sequentially stores movement events supplied from the input switching unit 14 at the end of the event queue. When processing a movement event, the movement event is taken out from the head of the event queue and sequentially processed.
[0054]
The flow line for each pedestrian obtained by the event processing unit 16 is output to the flow line recording file 6 or the display unit 7. Here, the flow line recording file 6 is a file in which a pedestrian flow line, that is, a pedestrian movement history that can be expressed by a combination of a place and a time is recorded. The display unit 7 refers to a screen such as a monitor, and a liquid crystal display (LCD), a light emitting diode (LED) panel, an electroluminescence (EL) panel, or the like can be used. The display unit 7 may be a printer.
[0055]
The flow line observation system 1 has a processing control device (CPU), and includes a recording event capturing unit 11, an external event capturing unit 12, a receiver information receiving unit 13, an input switching unit 14, and an event processing unit 16. It can be configured to be built in as a module. These modules can be realized by executing a dedicated program for using a predetermined program language in a general-purpose computer such as a personal computer. Although not shown, the flow line observation system 1 may include a recording medium that stores a program for executing functions such as the event processing unit 16. Examples of the recording medium include a hard disk, a flexible disk, a compact disk, an IC chip, and a cassette tape. According to the recording medium holding such a program, the program can be easily stored, transported, sold, and the like.
[0056]
According to the flow line observation system according to the embodiment of the present invention, the start / end of pedestrian activity is reliably detected, and at the same time, the position of the pedestrian is accurately detected, and the pedestrian flow line is observed without interruption. And the same transmitter can be used repeatedly.
[0057]
(Flow line observation method)
Next, the flow line observation method will be described with reference to FIG. 10 with reference to FIG. As illustrated in FIG. 10, the event processing unit 16 of the flow line observation system sequentially processes the movement events received from the input switching unit 14 and generates a flow line for each transmitter 21.
[0058]
(A) First, in step S101, the event processing unit 16 extracts one movement event from the head of the event queue. As described above, the “movement event” includes a detection flag, a receiver ID, a transmitter ID, and time information. Next, in step S102, the transmitter ID of the movement event is searched from the transmitter ID management table held in the transmitter ID holding unit 18. Next, in step S103, if the transmitter ID can be searched and is in use, the process proceeds to step S106. Being in use indicates that the use flag is true. Otherwise, the process proceeds to step S104.
[0059]
(B) In step S104, the area information table held in the environment information holding unit 17 is searched from the receiver ID included in the movement event, and the role code of the detection area is checked. Then, it is determined whether the role code includes an ENTRANCE attribute. If it is determined that the information is included, the process proceeds to step S105 to newly generate mobile unit information and a status buffer for the transmitter ID, newly register, and then proceeds to step S107. On the other hand, if it is determined not to be included, the process returns to step S101. The new registration process in step S105 will be described later.
[0060]
(C) In step S103, if the transmitter ID is searched and in use, the process proceeds to step S106, and after the transmitter ID conversion process is performed, the process proceeds to step S107. The transmitter ID conversion process in step S106 will be described later.
[0061]
(D) In step S107, the area information table held in the environment information holding unit 17 is searched from the receiver ID included in the movement event, and the role code of the detection area is checked. Then, it is determined whether the role code includes the EXIT attribute. If it is determined that it is included, the process proceeds to step S112, and exit processing is performed. On the other hand, if it is determined not to be included, the process proceeds to step S108. The exit process in step S111 will be described later.
[0062]
(E) In step S108, based on the movement event, the environment information held in the environment information holding unit 17 is considered, and the state buffer held in the moving body information holding unit 15 is updated. For example, if the determination process is performed after narrowing down the possible routes between two areas using the positional relationship, distance, and passage information between the areas, it is not possible to estimate a movement that is impossible in reality. In addition, in the environment where the recommended movement route is presented, the possibility of moving in the direction opposite to the normal route is considered to be lower than that in the forward direction. Position estimation is possible. Further, by comparing the route that often passes from the flow line of another transmitter as a whole with the flow line of the transmitter to be estimated, it is possible to estimate the position of existence more reliably. The “more probable” estimation means that when it is impossible to determine which area is correct, one area is selected probabilistically, and the probability to be used at that time is determined by the route or flow line. That is. In addition, another device such as a CCD camera may be installed in the detection area, and the update process may be performed in consideration of the detection result. The status buffer update processing in step S108 will be described later.
[0063]
(F) Next, in step S109, the position of the transmitter 21, that is, the presence area of the pedestrian 22 is estimated based on the updated state buffer. Then, the estimated existence area is stored in the area portion of the mobile object information. The position estimation process in step S109 will be described later.
[0064]
(G) Next, in step S110, if the status buffer or the existing area is changed in steps S108 and S109, the process proceeds to step S111. If there is no change, the process returns to step S101 and the above processing is repeated. In step S111, the flow line recording file 6 is output. Alternatively, the flow line information is displayed on the display unit 7. Then, it returns to step S101 and repeats said process.
[0065]
(New registration process)
Next, the transmitter ID new registration process in step S105 of FIG. 10 will be described with reference to FIG.
[0066]
(A) First, in step S201, the transmitter ID management table held in the transmitter ID holding unit 18 is searched from the transmitter ID included in the movement event. Next, in step S202, if the transmitter ID is not found, the process proceeds to step S203, and if found, the process proceeds to step S204.
[0067]
(B) In step S203, an entry for the transmitter ID is newly added to the transmitter ID management table. At this time, as initialization, the usage counter is set to 0 and the usage flag is set to false. When the process is completed, the process proceeds to step S204.
[0068]
(C) In step S204, the use flag of the transmitter ID is set to true. That is, it indicates that the transmitter is currently in use. Next, in step S205, a transmitter ID conversion process for the transmitter ID is performed. The transmitter ID conversion process in step S205 will be described later.
[0069]
(D) Next, in step S206, mobile information and a state buffer corresponding to the converted transmitter ID are newly created. The created mobile body information and state buffer are held in the mobile body information holding unit 15. As this initial value, both the mobile object information and the state buffer are empty.
[0070]
According to the above new registration process, even the same transmitter 21 can be managed with a different transmitter ID every time it passes through an area having the ENTRANCE attribute. Therefore, the moving body information and state buffer for every pedestrian 22 can be held.
[0071]
(Transmitter ID conversion process)
Next, the transmitter ID conversion process in step S106 in FIG. 10 and step S205 in FIG. 11 will be described.
[0072]
The target transmitter ID is given a unique ID that is uniquely determined based on the value of the usage counter held in the transmitter ID management table. For example, assume that the transmitter ID before conversion is “XXX”. When the usage counter is 0, the conversion process is not performed and “XXX” is left as it is. On the other hand, when the usage counter is c (c> 0), the transmitter ID is converted to “XXX: c”.
[0073]
The above processing may be converted into any format as long as it is guaranteed that the transmitter ID after conversion is unique. For example, “XXX-c” may be considered.
[0074]
(Exit processing)
Next, the exit process in step S112 in FIG. 10 will be described with reference to FIG.
[0075]
(A) First, in step S301, the mobile body information held in the mobile body state holding unit 15 is added. Specifically, the area name and arrival time are extracted and added from the movement event, and 0 is added as the residence time.
[0076]
(B) Next, in step S302, reverse conversion processing is performed on the transmitter ID in the movement event. “Reverse conversion process” refers to returning the converted transmitter ID to the transmitter ID before conversion in the reverse procedure of the transmitter ID conversion process in step S106 of FIG. 10 and step S205 of FIG. . For example, when the transmitter ID “XXX” is converted to “XXX: c” when the use counter is c (c> 0) as in the transmitter ID conversion process described above, “XXX: c ”is converted back to“ XXX ”. Since the transmitter ID is registered as “XXX” in the transmitter ID management table, it is necessary to restore the transmitter ID to the original transmitter ID by reverse conversion processing at the time of exit processing. However, when performing the transmitter ID search process, if the process is performed without referring to the portion below “XXX” (here, “: c”), the reverse conversion process may not be performed.
[0077]
(C) Next, in step S303, the transmitter ID management table held in the transmitter ID holding unit 18 is searched for the reversely converted transmitter ID, and the corresponding use flag is set to false. Next, in step S304, 1 is added to the value of the usage counter corresponding to the transmitter ID. Thus, by incrementing the usage counter, the number of uses of the transmitter 21 can be grasped.
[0078]
(Status update process)
Next, the state buffer update processing in step S108 in FIG. 10 will be described with reference to FIGS. 13 and 14 with reference to FIG.
[0079]
First, the update process when recognizing the “arrival” of a pedestrian to a certain area will be described with reference to FIG.
[0080]
(A) First, in step S401, the event processing unit 16 recognizes “arrival” to an area where the pedestrian 22 is present. That is, when the event processing unit 16 processes the movement event, the event processing unit 16 recognizes that the detection flag included in the movement event is “true”.
[0081]
(B) Next, in step S402, whether or not the area indicated by the movement event is an area that can be directly accessed from the area stored in the current normal position buffer is determined based on the area information table held in the environment information holding unit 17. Search to find out. Here, when the primary position buffer is empty, the information on the area stored in the secondary position buffer is used, and when both buffers are empty, it can be accessed unconditionally. If it is determined that access is possible, the process proceeds to step S403. On the other hand, if it is determined that access is impossible, the process is terminated.
[0082]
(C) Next, in step S403, it is determined whether or not the normal position buffer of the status buffer corresponding to the transmitter ID included in the movement event is empty. If it is empty, the process proceeds to step S404. In step S404, the area in which the pedestrian 22 is recognized from the receiver ID included in the movement event is input to the normal position buffer, and the process ends.
[0083]
(D) On the other hand, if it is determined in step S403 that it is not empty, the process proceeds to step S405. In step S405, it is checked whether or not the area indicated by the movement event is the area next to the area stored in the current normal position buffer with reference to the path numbers in the area information tables of both areas. Here, when the route number of either the area stored in the current normal position buffer or the area recognized as having arrived is −1 (in the case of an area not included in the route), The next area is determined unconditionally. If it is determined that the area is the next area, the process advances to step S406 to move the value of the normal position buffer to the sub position buffer. In step S404, the recognized area is input to the normal position buffer, and the process ends.
[0084]
(E) On the other hand, if it is determined in step S405 that the area is not the next area, the process proceeds to step S407. In step S407, the area where the pedestrian is recognized from the receiver ID of the movement event is input to the sub-position buffer, and the process ends.
[0085]
According to the above update process related to “arrival”, the normal position buffer and the sub position buffer are updated using the environmental information such as whether the access between areas is possible or the route is normal, so it is more likely. Presence location can be estimated.
[0086]
Next, update processing when recognizing a “pedestrian” of a pedestrian from a certain area will be described with reference to FIG.
[0087]
(A) First, in step S501, the event processing unit 16 recognizes “leave” from an area where a pedestrian is present. That is, when the event processing unit 16 processes the movement event, the event processing unit 16 recognizes that the detection flag included in the movement event is “false”.
[0088]
(B) Next, in step S502, it is determined whether the departure from the area input in the normal position buffer of the status buffer corresponding to the transmitter ID included in the movement event. If it is the departure from the area input to the normal position buffer, the process proceeds to step S503, and the value of the normal position buffer is moved to the sub position buffer. In step S504, the normal position buffer is emptied, and the process ends.
[0089]
(C) On the other hand, if it is determined in step S502 that the area is not input to the normal position buffer, the process proceeds to step S505. Here, it is determined whether or not it is a departure from the area input to the sub-position buffer and the role attribute of the area includes the OBSCACL attribute. If the area includes the OBSTACLE attribute, there is a high possibility that a radio wave interference has occurred, and the “separation” is not certain. Therefore, the attribute is determined in step S505. Only when it is a departure from the area input to the sub-position buffer and the OBSCACLE attribute is not included, the process proceeds to step S506, the sub-position buffer is emptied, and the process ends. In other cases, the state buffer is not updated and the process is terminated.
[0090]
According to the above update processing related to “leave”, the role attribute of the area is referred to, and the normal position buffer and the sub position buffer are updated. Therefore, it is possible to estimate the existence position more reliably.
[0091]
(Position estimation process)
Next, the position estimation process in step S109 in FIG. 10 will be described with reference to FIG.
[0092]
(A) First, in step S601, it is determined whether the normal position buffer is empty. If the primary position buffer is empty, the process advances to step S602 to determine whether the secondary position buffer is also empty. If the sub position buffer is also empty, it is determined that the position is unknown. If the sub-position buffer is not empty, there is a high possibility that there is a pedestrian in the area input to the sub-position buffer, but it is not certain, so it is determined that the position is uncertain. As described above, when it is determined that the position is “indeterminate”, it may be estimated that the area input to the sub-position buffer is an area where a pedestrian exists.
[0093]
(B) If the primary position buffer is not empty in step S601, the process proceeds to step S603 to determine whether the sub position buffer is empty. If it is empty, it means that there is a pedestrian in the area input in the normal position buffer, and it is determined that the position is “fixed”. If the sub-position buffer is not empty, there is a high possibility that there are pedestrians in the area entered in the normal position buffer, but there is also a possibility that there are pedestrians in the sub-position buffer area. It is judged that. In this way, when it is determined that the position is “indeterminate”, it may be estimated that the area input to the normal position buffer is an area where a pedestrian exists.
[0094]
According to the flow line observation method according to the embodiment of the present invention, the position of the pedestrian can be detected with high accuracy by referring to the environment information held in the environment information holding unit 17. In particular, by referring to the role attribute of the detection area, the route number, and the accessible area included in the environment information, it is possible to estimate a more likely location of the pedestrian.
[0095]
Further, the same transmitter 21 is obtained from information including the role attribute of the detection area held in the environment information holding unit 17, the number of uses of the transmitter ID held in the transmitter ID holding unit 18, and the current usage status. Even if a plurality of pedestrians 22 repeatedly use it, the moving body information and the state buffer for each pedestrian 22 can be managed. Conventionally, it has been necessary to manage the carrying time of the transmitter 121 for each pedestrian within the observation area 26, but according to the flow line management method according to the embodiment of the present invention, Thus, the flow line for each pedestrian 22 can be managed in the flow line management system 1 without performing any special processing.
[0096]
(Other embodiments)
Although the present invention has been described according to the above-described embodiments, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.
[0097]
For example, in the embodiment of the present invention, the moving body that moves in the observation area has been described as a pedestrian, but it is needless to say that the present invention is not limited thereto.
[0098]
Further, in the embodiment of the present invention, it has been described that the time information is added by the external event capturing unit 12, but when the receivers 20a, 20b, ..., 20e send information to the receiver information receiving unit 13, Time information may be added. However, the advantage is that it is not necessary to consider the time error between the receivers 20a, 20b,..., 20e when the external event capturing unit 12 adds time information to the receivers 20a, 20b,. There is.
[0099]
In the embodiment of the present invention, the mobile state holding unit 15, the environment information holding unit 17, and the transmitter ID holding unit 18 have been described separately. However, a single holding unit may be shared. In addition, the flow line observation system according to the embodiment of the present invention may include a state buffer holding unit and an event queue holding unit that hold a state buffer and an event queue separately. At this time, the state buffer holding unit and the event queue holding unit may use an internal storage device such as a RAM or an external storage device such as an HD or an FD, like the mobile state holding unit 15 or the like. .
[0100]
As described above, the present invention naturally includes various embodiments not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.
[0101]
【The invention's effect】
According to the present invention, the position of a mobile object is detected with high accuracy, and even if the same transmitter is used repeatedly, each mobile object using the same transmitter is used without special processing in the observation area. It is possible to provide a flow line observation system, a flow line observation method, and a flow line observation program that can recognize a movement history.
[Brief description of the drawings]
FIG. 1 is a configuration block diagram of a flow line observation system according to an embodiment of the present invention.
FIG. 2 is a configuration block diagram of a wireless tag provided in the transmitter according to the embodiment of the present invention.
FIG. 3 is an example of transmitter information according to the embodiment of the present invention.
FIG. 4 is an example of mobile information according to the embodiment of the present invention.
FIG. 5 is an example of a status buffer according to the embodiment of the present invention.
FIG. 6 is an example of an observation area according to an embodiment of the present invention.
FIG. 7 is an example of an area information table according to the embodiment of the present invention.
8 is an example of a role code in FIG.
FIG. 9 is an example of a transmitter ID management table according to the embodiment of the present invention.
FIG. 10 is a flowchart of a flow line observation method according to an embodiment of the present invention.
11 is a detailed flowchart of step S105 in FIG.
12 is a detailed flowchart of step S112 in FIG.
FIG. 13 is a detailed flowchart of step S108 in FIG. 10 (No. 1).
FIG. 14 is a detailed flowchart of step S108 in FIG. 10 (No. 2).
15 is a detailed flowchart of step S109 in FIG.
FIG. 16 is a diagram illustrating an example of overlapping conventional detection areas.
[Explanation of symbols]
1 Flow line observation system
5 recording files
6 Flow line recording file
7 Display section
9 Input section
11 Record event capture section
12 External Event Capture Department
13 Receiver information receiver
14 Input switching part
15 Moving object state holding unit
16 Event processing part
17 Environmental Information Holding Department
18 Transmitter ID holder
20a, 20b, ..., 20e, 120a, 120b Receiver
21, 121 Transmitter
22, 122 Pedestrian
25 Communication network
26 Observation area
27 partition
30 wireless tag
31 Identification information holding unit
32 Transmitter
33 Antenna

Claims (16)

Receiver that receives receiver information including a transmitter ID unique to the transmitter, transmitted from a plurality of receivers arranged in an observation area in which a mobile object carrying the transmitter moves, via a communication network An information receiver;
A mobile state holding unit having a state buffer representing candidates for the current position of the mobile;
An environment information holding unit for holding environment information regarding each detection area of the plurality of receivers;
A transmitter ID holding unit for holding transmitter ID management information including the number of times the transmitter is used and the current usage status;
A flow line observation comprising: an event processing unit that updates the state buffer and the transmitter ID management information based on the receiver information and the environment information, and estimates a current position of the mobile body system. The environment information includes a role attribute of each detection area of the plurality of receivers,
The event processing unit refers to the environment information holding unit and the transmitter ID holding unit,
If the current usage status of the transmitter is “not used” and the role attribute is “observation start point”, the usage status is updated to “used”,
When the current usage status of the transmitter is “use” and the role attribute is “observation end point”, the usage status is updated to “not used”,
The flow line observation system according to claim 1, wherein the current position is estimated when the use state is “use”. The event processing unit refers to the environment information holding unit and the transmitter ID holding unit,
When updating the current usage status of the transmitter from “used” to “not used”, the value of the number of times of use for the transmitter is incremented by 1,
When updating the current usage status of the transmitter from “not used” to “used”, the transmitter ID of the transmitter is converted to a transmitter ID that is uniquely determined based on the number of uses. The flow line observation system according to claim 1. The flow line observation system according to claim 2, wherein the role attribute can be arbitrarily changed. A flow line for receiving, via a communication network, receiver information including a transmitter ID unique to the transmitter, transmitted from a plurality of receivers arranged in an observation area where a mobile object carrying the transmitter moves. In the observation system,
Based on the receiver information and environmental information regarding each detection area of the plurality of receivers, a normal position buffer that stores the current position of the mobile body, and if the mobile body does not exist in the normal position buffer, Updating a status buffer corresponding to the transmitter ID, having one or more sub-position buffers for storing candidate positions of
Estimating the current position of the moving object from the state buffer. The receiver information includes a detection flag indicating whether or not the receiver is detecting the transmitter;
The environmental information includes route information indicating a movement order in the observation area of the moving body,
The step of updating the state buffer refers to the positional relationship between the detection areas when “arrival” is recognized based on the detection flag,
If the detection area of the receiver is directly accessible from the area stored in the status buffer and the normal position buffer is empty, inputting the detection area of the receiver to the normal position buffer;
If the detection area of the receiver is directly accessible from the area stored in the status buffer and the normal position buffer is not empty, the route information is referred to and the detection area of the receiver is stored in the normal position buffer. Moving the value of the normal position buffer to the sub position buffer and inputting the detection area of the receiver to the normal position buffer,
If the detection area of the receiver is directly accessible from the area stored in the status buffer and the normal position buffer is not empty, the route information is referred to and the detection area of the receiver is stored in the normal position buffer. 6. The flow line observation method according to claim 5, further comprising a step of inputting the detection area of the receiver to the sub-position buffer when the area is not the next area of the area being operated. The receiver information includes a detection flag indicating whether or not the receiver is detecting the transmitter;
The environment information includes route information indicating a role attribute of each detection area of the plurality of receivers and a moving order in the observation area of the moving body,
The step of updating the state buffer is performed when “leaving” is recognized based on the detection flag.
If the detection area of the receiver is the same as the area stored in the primary buffer, moving the primary buffer value to the secondary buffer and emptying the primary buffer;
Emptying the sub-position buffer if the detection area of the receiver is the same as the area stored in the sub-position buffer and the role attribute includes an attribute in which a radio obstacle exists. The flow line observation method according to claim 5, wherein: A flow line for receiving, via a communication network, receiver information including a transmitter ID unique to the transmitter, transmitted from a plurality of receivers arranged in an observation area where a mobile object carrying the transmitter moves. In the flow line observation method for observing the flow line of the moving body using an observation system,
Searching for a transmitter ID included in the receiver information from transmitter ID management information including the number of uses of the transmitter ID and the current usage status held by the flow line observation system;
Each of the plurality of receivers that discovers a transmitter ID included in the receiver information in the transmitter ID management information, and that the transmitter ID is not currently used and is held by the flow line observation system. When the role information of each detection area of the plurality of receivers included in the environment information is an attribute indicating “observation start point” with reference to the environment information related to the detection area, the transmitter ID management information includes the transmitter. A step of newly registering an ID;
When the transmitter ID included in the receiver information is found in the transmitter ID management information, the transmitter ID is currently in use, and the role attribute is an attribute indicating “observation end point”, And a step of performing a process of ending the observation of the moving body. The step of performing the new registration includes:
Updating the current usage status of the transmitter ID as “used”;
Converting the transmitter ID into a transmitter ID that is uniquely determined based on the number of uses of the transmitter ID;
A post-conversion buffer that has a primary position buffer that stores a current position of the mobile body, and one or more sub-position buffers that store a next candidate position when the mobile body does not exist in the primary position buffer. The flow line observing method according to claim 8, further comprising: creating a new state buffer corresponding to the transmitter ID. The step of performing the process of ending the observation of the mobile object is as follows:
Updating the current usage status of the transmitter ID as “not used”;
The flow line observation method according to claim 8, further comprising: adding 1 to the value of the number of times of use for the transmitter. A flow line for receiving, via a communication network, receiver information including a transmitter ID unique to the transmitter, transmitted from a plurality of receivers arranged in an observation area where a mobile object carrying the transmitter moves. In the observation system,
Based on the receiver information and environmental information regarding each detection area of the plurality of receivers, a normal position buffer that stores the current position of the mobile body, and if the mobile body does not exist in the normal position buffer, Updating a status buffer corresponding to the transmitter ID, having one or more sub-position buffers for storing candidate positions of
A flow line observation program for executing a procedure for estimating a current position of the moving object from the state buffer. The receiver information includes a detection flag indicating whether or not the receiver is detecting the transmitter;
The environmental information includes route information indicating a movement order in the observation area of the moving body,
The procedure for updating the state buffer refers to the positional relationship between the detection areas when "arrival" is recognized based on the detection flag,
If the detection area of the receiver is directly accessible from the area stored in the status buffer and the normal position buffer is empty, inputting the detection area of the receiver to the normal position buffer;
If the detection area of the receiver is directly accessible from the area stored in the status buffer and the normal position buffer is not empty, the route information is referred to and the detection area of the receiver is stored in the normal position buffer. Moving the value of the normal position buffer to the sub position buffer and inputting the detection area of the receiver to the normal position buffer,
If the detection area of the receiver is directly accessible from the area stored in the status buffer and the normal position buffer is not empty, the route information is referred to and the detection area of the receiver is stored in the normal position buffer. The flow line observation program according to claim 11, further comprising the step of inputting the detection area of the receiver to the sub-position buffer when the area is not the next area to the area being recorded. The receiver information includes a detection flag indicating whether or not the receiver is detecting the transmitter;
The environment information includes route information indicating a role attribute of each detection area of the plurality of receivers and a moving order in the observation area of the moving body,
The procedure for updating the status buffer is as follows: when "leave" is recognized based on the detection flag
If the detection area of the receiver is the same as the area stored in the primary buffer, moving the primary buffer value to the secondary buffer and emptying the primary buffer;
Emptying the sub-position buffer if the detection area of the receiver is the same as the area stored in the sub-position buffer and the role attribute includes an attribute in which a radio obstacle exists. The flow line observation program according to claim 11. A flow line for receiving, via a communication network, receiver information including a transmitter ID unique to the transmitter, transmitted from a plurality of receivers arranged in an observation area where a mobile object carrying the transmitter moves. In the observation system,
A procedure for searching for a transmitter ID included in the receiver information from transmitter ID management information including the number of times the transmitter ID is used and the current usage status held by the flow line observation system;
Each of the plurality of receivers that discovers a transmitter ID included in the receiver information in the transmitter ID management information, and that the transmitter ID is not currently used and is held by the flow line observation system. When the role information of each detection area of the plurality of receivers included in the environment information is an attribute indicating “observation start point” with reference to the environment information related to the detection area, the transmitter ID management information includes the transmitter. A procedure for newly registering an ID;
When the transmitter ID included in the movement event is found in the transmitter ID management information, the transmitter ID is currently in use, and the role attribute is an attribute indicating “observation end point”, A flow line observation program for executing a procedure for performing a process of ending observation of a moving object. The procedure for performing the new registration is as follows:
Updating the current usage status of the transmitter ID as “used”;
Converting the transmitter ID into a transmitter ID that is uniquely determined based on the number of uses of the transmitter ID;
A post-conversion buffer that has a primary position buffer that stores a current position of the mobile body, and one or more sub-position buffers that store a next candidate position when the mobile body does not exist in the primary position buffer. 15. The flow line observation program according to claim 14, further comprising the step of newly creating a state buffer corresponding to the transmitter ID. The procedure for performing the process of ending the observation of the moving object is as follows:
Updating the current usage status of the transmitter ID as “not used”;
The flow line observation program according to claim 14, further comprising: adding 1 to the value of the number of times of use for the transmitter.

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