JP2011205453A - Arrival/departure platform determination system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an arrival/departure platform determination system for easily determining information about an arrival/departure platform to be used when a user gets on/off a train.SOLUTION: An arrival/departure platform determination unit 22 generates a motion trajectory vector based on information on a mobile terminal located in a predetermined area including the arrival/departure platform. The arrival/departure platform determination unit 22 extracts the motion trajectory vector passing across an arrival/departure platform polygon corresponding to the arrival/departure platform among the generated motion trajectory vectors. The arrival/departure platform in a target station at which a target train has arrived is determined, based on the extracted motion trajectory vector and the arrival/departure platform polygon.

Description

  The present invention relates to an arrival home determination system that determines a departure / arrival home of a train based on probe information transmitted from a plurality of mobile terminals.

  In recent years, devices such as GPS receivers that acquire position information have been miniaturized, and it has become possible to mount these devices on small mobile terminals. Further, it is also possible to provide a service for transmitting position data measured by a plurality of mobile terminals from a communication terminal to a server, analyzing the position information, and providing the analysis result to the user. For example, Patent Document 1 describes a technique for processing probe information transmitted from a user. Here, the probe information is the position information of the current position detected by the position detection unit by the mobile terminal, the time information of the detection time when the current position is detected, etc., and the probe information is generated from the mobile terminal. Information transmitted to the device. Hereinafter, the probe information is also referred to as “mobile terminal information”.

  By analyzing such probe information, it is possible to determine and maintain various information. In the technique described in Patent Document 1, operation information (delay information) of transportation facilities such as trains is acquired using probe information transmitted from a user.

Japanese Patent Laid-Open No. 2007-219672

By the way, a diagram and a timetable representing the train operation status on a predetermined route can be obtained from the Internet using a mobile terminal or the like. On the other hand, it is difficult to obtain information on which train arrives at which platform of the station. This is probably because the work of maintaining the arrival home is complicated and the maintenance does not proceed.
An object of the present invention is to provide a departure / arrival home determination system that allows a user to easily determine information about a departure / arrival home used when getting on and off a train.

In order to solve the above-described problem, the present invention receives mobile terminal information including information on the current position from a plurality of mobile terminals, and determines a train landing home at the station based on the mobile terminal information. A mobile terminal information storage unit for storing received mobile terminal information, a region shape information storage unit for storing region shape information indicating a region shape of a departure / arrival platform of a station, and diagram information relating to a train diagram Based on the area shape information and the diamond information, the mobile terminal information measured within a predetermined time range within a predetermined area including the area shape information, based on the area shape information and the diamond information. A mobile terminal information extraction unit to be extracted and a departure / arrival home determination for determining a departure / arrival home of the train based on the mobile terminal information extracted by the mobile terminal information extraction unit Characterized in that it comprises and.
It should be noted that the above-described features do not enumerate all the features of the present invention, and a method using these as essential parts can also be an invention.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to determine easily the data regarding the platform which a train arrives at each station using the probe information transmitted from a portable terminal.

FIG. A schematic diagram of the station. The flowchart of the determination process of this invention. The figure which shows an example of the extraction area | region used by this invention. The figure which shows an example of the extraction area | region used by this invention. The flowchart of a departure / arrival home determination process. Explanatory drawing of an unnecessary movement locus vector. The figure explaining the relationship between departure / arrival home and mobile terminal information. The figure explaining the relationship between departure / arrival home and mobile terminal information.

Embodiments embodying the present invention will be described below.
As shown in FIG. 1, the arrival / departure home determination system in the present embodiment includes a mobile terminal 11, a radio base station 12, the Internet 13 as a public communication line, and a server 14. The radio base station 12 is assumed to be, for example, a radio base station of the mobile terminal 11 and is arranged for each predetermined distance or region. The radio base station 12 is connected to the server 14 through the Internet 13 so as to be communicable.
The mobile terminal 11 includes a GPS 15 as a position measurement unit, a terminal transmission / reception unit 16, and a terminal control unit 17. The server 14 includes a hard disk 20 as a mobile terminal information storage unit, an area shape information storage unit, and a diamond information storage unit, a mobile terminal information extraction unit 21, a departure / arrival home determination unit 22, a server transmission / reception unit 23, and a CPU 24 as a control unit. .

  The GPS 15 measures the current position of the mobile terminal 11 based on the control of the terminal control unit 17. Specifically, the current position (latitude and longitude) of the mobile terminal 11 is measured based on radio signals transmitted from a plurality of GPS satellites received by the GPS antenna of the mobile terminal 11. In addition to this, the current position may be determined by a method using DGPS (differential GPS), a method using radio waves of the radio base station 12 of the mobile terminal 11, a method using or using a gyro sensor, or the like. Good.

The terminal transmission / reception unit 16 has a function of transmitting various data such as mobile terminal information from the portable terminal 11 to the server 14 based on the control of the terminal control unit 17 and receiving various data transmitted from the server 14. The mobile terminal information includes position information related to the position measured by the GPS 15, time information corresponding to the time when the position is measured, terminal-specific information and ID information for identifying each mobile terminal 11, and the like. ing. The mobile terminal information is transmitted to the server 14 via the radio base station 12 and the Internet 13. Note that the mobile terminal information is transmitted from the mobile terminal 11 to the server 14 at regular intervals (for example, 5 seconds). Alternatively, instead of being transmitted at regular intervals, a certain number of items accumulated in the portable terminal 11 may be collectively transmitted from the terminal transmission / reception unit 16 to the server 14.
The terminal control unit 17 has a function of controlling operations of the units 15 and 16 included in the mobile terminal 11 based on a predetermined program recorded in a memory (not shown).

Mobile terminal information transmitted from the mobile terminal 11 and received by the server transmission / reception unit 23 is stored in the hard disk 20.
Further, as shown in FIG. 2, the hard disk 20 stores area shape information related to the arrival and departure home polygons 25 representing the shape of the arrival and departure home areas of each station together with its position information (latitude and longitude), station name information, and home number information. Has been. The departure / arrival platform constitutes a station together with the station building 26 and the route 27.
Furthermore, as shown in Table 1, the hard disk 20 stores diagram information related to the schedule from the first station to the last station for each train.

Table 1

  The schedule information stores the arrival and departure times of predetermined trains at each station. Here, in Table 1, “Iwata Station” is the first train station, so the arrival time is not stored. Further, since “Ogura Station” is the terminal station, the departure time is not stored. In addition, these timetable data include various types of trains (normal, express, limited express, etc.), train name, train number, train equipment, operation days (daily operation, operation only on weekends, operation only on weekdays, etc.) Train information is associated. In addition, about time, you may make it memorize | store only any one time information in the information regarding departure / arrival. Further, as shown in Table 1, the diagram information is provided with an area for storing information on the departure and arrival platforms at each station, but the information does not exist in a state before the arrival and departure platforms are maintained.

  The mobile terminal information extraction unit 21 extracts mobile terminal information measured within a predetermined time range within a predetermined area including the area shape information, from the mobile terminal information, based on the area shape information and the diagram information. The predetermined area includes an area corresponding to the station building. In addition, the predetermined time range is preferably set to a certain time range from before to after train arrival and departure obtained by referring to the diagram information. For example, when the train arrives at a station at 12:10, the predetermined time range is from 12:09 to 12:15. The reason why the time range before the estimated arrival time in the time range is reduced is that the train rarely arrives before the estimated arrival time. On the other hand, the reason why the time range after the estimated arrival time was increased was that the train was assumed to be delayed due to various circumstances. In other words, the predetermined time may be set to an appropriate number of minutes before and after the estimated arrival time in consideration of arrival times of the preceding and following trains, train delays, and the like.

The departure / arrival home determination unit 22 determines the departure / arrival home of the train based on the mobile terminal information extracted by the mobile terminal information extraction unit 21.
The server transmission / reception unit 23 has functions of transmitting various data from the server 14 to the mobile terminal 11 and receiving various data such as mobile terminal information transmitted from the mobile terminal 11.
The CPU 24 has a function of controlling operations of the units 20 to 23 included in the server 14 based on a predetermined program recorded in a memory or the like.

Next, a method for determining a departure / arrival home using the departure / arrival home determination system according to the present embodiment will be described.
As shown in FIG. 3, first, the CPU 24 selects a train to be determined (step S31). Next, the CPU 24 reads the schedule information of the station where the train stops from the hard disk 20 (step S32). And CPU24 extracts the arrival / departure time information which is the arrival / departure time of the train used as the object contained in the said diamond information.

Moreover, CPU24 reads the data of the arrival / departure home polygon 25 of the target station where a train stops from the hard disk 20 (step S33).
Next, the CPU 24 determines a region 28 having a substantially elliptical shape as shown in FIG. 4 that includes the entire landing home polygon 25 centered on a predetermined position of the landing home polygon 25 (step S34).

  Note that the shape of the region 28 is not limited to an elliptical shape. A circular shape may be sufficient, and the shape obtained by fattening the landing home polygon 25 may be sufficient. In other words, it may be an area that includes all the arrival and departure home polygons 25. By determining the region 28 for extracting mobile terminal information in this way, it becomes possible to extract mobile terminal information on the departure and arrival homes with priority. The reason why the area of the arrival / departure home polygon 25 is not directly adopted as the area 28 is that the positioning accuracy of the GPS 15 is taken into consideration. That is, even if the positioning accuracy is inferior, a certain amount of mobile terminal information can be extracted.

  Next, the CPU 24 determines a predetermined time range based on the arrival / departure time information of the target train at the target station. For example, when the target station is Kutanami Station, the arrival / departure time of the target train is 8:18 as shown in Table 1, so the CPU 24 determines the predetermined time range from 8:17 to 8:23. . Then, the mobile terminal information extraction unit 21 exists in the area 28 between 8:17 and 8:23 in the mobile terminal information stored in the hard disk 20 of the server 14 as shown in FIG. Mobile terminal information is extracted (step S35). Specifically, the mobile terminal information extraction unit 21 performs internal / external determination as to whether or not the position coordinates (latitude, longitude) of the mobile terminal information exist within the region 28.

Next, the departure / arrival home determination unit 22 determines the arrival / departure home at the target station of the target train based on the mobile terminal information extracted by the mobile terminal information extraction unit 21 (step S36). Specific departure / arrival home determination processing will be described later.
CPU24 memorize | stores the information regarding the departure / arrival home determined in the arrival / departure home determination part 22 in the area | region which memorize | stores the information regarding the arrival / departure home of the object station in a diagram information, as shown in Table 2.

Table 2

  And CPU24 judges whether it was judged about all object stations based on timetable information (Step S37). When determining that determination has been made for all target stations, the CPU 24 ends the processing. On the other hand, if it is determined that determination has not been made for all target stations, the CPU 24 executes a departure / arrival home determination process for the next target station.

Next, the arrival / departure home determination process (step S36) will be described.
As shown in FIG. 6, first, the arrival / departure home determination unit 22 uses the same mobile terminal information 29 extracted by the mobile terminal information extraction unit 21 based on the ID information included in the mobile terminal information 29. Classification is made for each mobile terminal information 29 transmitted from the terminal 11 (step S61). Next, as shown in FIG. 8, the arrival / departure home determination unit 22 moves the mobile terminal 11 that has transmitted the mobile terminal information 29 by following the mobile terminal information 29 transmitted from the same mobile terminal 11 in time order. A movement trajectory vector 30 indicating this is generated (step S62).

  Next, the departure / arrival home determination unit 22 is directed from the route 27 side in the direction in which the arrival / departure home polygon 25 exists, the movement trajectory vector 30 crossing the departure / arrival home polygon 25, and the route 27 from the arrival / departure home polygon 25 side. A moving trajectory vector 30 that is moving in the direction and crosses the departure / arrival home polygon 25 is extracted (step S63). For example, the departure / arrival home determination unit 22 extracts a movement trajectory vector 30 that intersects the longitudinal side of the arrival / departure home polygon 25.

  In FIG. 8, a departure / arrival home polygon 25 is set for each home. That is, the departure / arrival home polygons 25a to 25d correspond to the first to fourth homes, respectively. In the example shown in FIG. 8, the movement trajectory vector 30 generated based on the mobile terminal information 29 existing on the arrival / departure home polygon 25b corresponding to the second home does not cross the departure / arrival home polygon 25b. Therefore, these movement trajectory vectors 30 are not extracted by the departure / arrival home determination unit 22.

  On the other hand, the movement trajectory vector 30 generated based on the mobile terminal information 29 existing on the departure / arrival home polygon 25c corresponding to the third home is directed from the route 27 side toward the direction where the arrival / departure home polygon 25 exists. In addition, there are a movement trajectory vector 30 a that crosses the departure / arrival home polygon 25 and a movement trajectory vector 30 b that extends from the departure / arrival home polygon 25 side in the direction in which the route 27 exists and crosses the departure / arrival home polygon 25. These movement trajectory vectors 30 a and 30 b are extracted by the arrival / departure home determination unit 22.

Here, the movement trajectory vector 30 extracted by the departure / arrival home determination unit 22 may include a vector that is not suitable as a vector for determining the arrival home. Therefore, the departure / arrival home determination unit 22 executes a process of extracting and removing the movement trajectory vector 30 that is unnecessary for determining the arrival home as noise (step S64).
As shown in FIG. 7, in the movement trajectory vector 30 generated based on the mobile terminal information 29 transmitted from the user who passes through the station building 26, the departure / arrival home polygon 25 exists in the direction from the route 27 side. This is because there is a moving trajectory vector 30 that crosses the departure / arrival home polygon 25 and such a movement trajectory vector 30 may cause a wrong determination of the departure / arrival home.

An example of a specific removal method is as follows.
First, for the mobile terminal information 29 that generates the movement trajectory vector 30 extracted as crossing the departure / arrival home polygon 25, the mobile terminal information extraction unit 21 stores the mobile terminal information 29 acquired at a predetermined time before and after the mobile terminal information 29 from the hard disk 20. Extract. Next, the departure / arrival home determination unit 22 generates a movement trajectory vector 30 based on the mobile terminal information 29. Then, attention is paid to the moving speed obtained from the series of moving trajectory vectors 30 thus generated. This is because the movement speed after getting on the train and the movement speed before getting off the train move along the track at a speed faster than walking.

  That is, for the movement trajectory vectors before and after the movement trajectory vector 30 extracted as crossing the departure / arrival home polygon 25, the movement trajectory vector is noise when the speed is less than a certain value. And remove. This is because it was not assumed that he was on the train. In addition to this condition, the fact that the vector direction of the movement trajectory vector is not clearly along the line is also set as an additional condition, so that noise can be determined more reliably.

Here, regarding the speed, the constant value may be a value that clearly exceeds the average walking speed (for example, 5 km / h) (for example, 10 km / h).
The departure / arrival home determination unit 22 may also remove the movement trajectory vector 30 when it is determined that the series of movement trajectory vectors 30 are moving across the route 27. This is because the user moving across the route 27 can determine that the user is traveling in the station building 26.

  Next, the departure / arrival home determination unit 22 determines which departure / arrival home at the target station the target train has arrived on the basis of the extracted movement trajectory vector 30 and the arrival / departure home polygon 25 (step S65). In the example of FIG. 8, the movement trajectory vectors 30 that cross the departure / arrival home polygon 25 are only the movement trajectory vectors 30a, 30b that traverse the departure / arrival home polygon 25c. Therefore, the departure / arrival home determination unit 22 can determine that the user of the mobile terminal 11 has got off the target train to the third home and can determine that the user has boarded the target train from the third home.

The example of FIG. 8 is an ideal pattern, that is, a case where the positioning accuracy of the GPS 15 is excellent. However, since the position accuracy of the GPS 15 is actually inferior, the acquired position of the mobile terminal 11 may be shifted from the actual position of the mobile terminal 11.
Therefore, the departure / arrival home determination unit 22 may execute the following process (actual position estimation process) as a pre-process of the mobile terminal information classification process (step S61).

  The departure / arrival home determination unit 22 estimates the actual position of the mobile terminal information 29 based on the relative positional relationship of all the mobile terminal information 29 existing in the area 28 (FIG. 5). A position estimation process is executed. Even if the positioning accuracy of the GPS 15 is inferior, this estimation processing can be realized because there is no variation in the positioning accuracy of the relative positional relationship of all the mobile terminal information 29.

  In the example of FIG. 9, the arrival / departure home determination unit 22 recognizes that the mobile terminal information 29a exists on the left side of the departure / arrival home polygon 25a, and the mobile terminal information 29 exists on the arrival / departure home polygon 25d. By recognizing that it is not, it is recognized that all the mobile terminal information 29 is shifted to the left of the target station as a whole. Therefore, the arrival / departure home determination unit 22 shifts all the mobile terminal information 29 and the movement trajectory vector 30 to the right. Specifically, the mobile terminal information 29a is shifted so as to be on the arrival / departure home polygon 25a.

With this process, even when the mobile terminal information 29 exists at a position deviating from the actual positioning position, that is, when the positioning accuracy of the GPS 15 is inferior, it is possible to accurately determine the departure / arriving home.
As described above, according to the arrival / departure home determination system in the present embodiment, the mobile terminal information 29 transmitted from the terminal transmission / reception unit 16 of the mobile terminal 11 owned by a plurality of users and the area shape of the arrival / departure homes of each station are represented. The departure / arrival home can be easily determined based on the data or the like.

(Modification)
Regardless of the embodiment described above, the present invention can be applied in various modes.
-Although the train departure / arrival platform has been described in this embodiment, the present invention can also be applied to determination of bus departure / arrival stops.
In the above embodiment, it is assumed that the train is operating as scheduled to some extent. Therefore, when a large delay of several tens of minutes occurs, the home cannot be accurately determined. For such a case, the arrival / departure home determination process may be executed a plurality of times to improve the reliability.

-Mobile terminals owned by a plurality of users who get on the same train and mobile terminals owned by a plurality of users who get off the same train move in substantially the same direction. For this reason, the movement directions of the plurality of movement trajectory vectors 30 within the predetermined time range also tend to be substantially the same. Therefore, when a plurality of movement trajectory vectors 30 in a predetermined time zone before and after the train arrives have a component in a direction substantially perpendicular to the home polygon 25, the arrival / departure home determination unit 22 The departure / arrival home corresponding to the departure / arrival home polygon 25 that the movement trajectory vectors 30 cross at the same time may be determined as the departure / arrival home of the target train. Since the departure / arrival home is determined based on a plurality of movement trajectory vectors 30 having substantially the same movement direction, the determination accuracy can be improved.

Furthermore, the departure / arrival home determination unit 22 determines the arrival / departure platform of the target train based on the plurality of movement trajectory vectors 30 that are substantially parallel among the plurality of movement trajectory vectors 30 in a predetermined time range before and after the train arrives. You may make it determine. A plurality of movement trajectory vectors 30 that are substantially parallel are extracted by the mobile terminal information extraction unit 21. For example, the departure / arrival home corresponding to the departure / arrival home polygon 25 crossed by the plurality of substantially parallel movement trajectory vectors 30 is determined as the departure / arrival home of the target train.

DESCRIPTION OF SYMBOLS 11 ... Portable terminal 12 ... Server 20 ... Hard disk as mobile terminal information storage part, area | region shape information storage part, and diagram information storage part 21 ... Mobile terminal information extraction part 22 ... Departure / arrival home determination part 29 ... Mobile terminal information (probe information)

Claims (3)

It is a departure and arrival home determination system that receives mobile terminal information including information on the current position from a plurality of mobile terminals, and determines a departure and arrival home of a train at a station based on the mobile terminal information,
A mobile terminal information storage unit for storing the received mobile terminal information;
An area shape information storage unit for storing area shape information representing the area shape of the station departure and arrival platform;
A diamond information storage unit for storing diamond information related to train schedules;
Based on the region shape information and the diagram information, a mobile terminal information extraction unit that extracts mobile terminal information measured within a predetermined time range within a predetermined region including the region shape information, out of the mobile terminal information,
A departure / arrival home determination system, comprising: a departure / arrival home determination unit that determines a departure / arrival home of the train based on the mobile terminal information extracted by the mobile terminal information extraction unit.   The arrival / departure home determination unit estimates the actual position of all the mobile terminal information based on the relative positional relationship of all the mobile terminal information existing in the predetermined area. The departure / arrival home determination system according to claim 1, further comprising an estimation function. 3. The departure / arrival home determination system according to claim 1, wherein the predetermined time range is a certain time range from before to after a train arrival / departure obtained by referring to the diagram information.