JP3276945B2 - Data processing device and recording medium recording data processing program - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing apparatus for detecting a moving path of a moving object from position data indicating a position of the moving object that is temporally continuous, and a recording medium storing a data processing program.

[0002]

2. Description of the Related Art Conventionally, when examining the development of a traffic network such as a road network or a railway network in an arbitrary area, the traffic demand in the area is predicted, and the contents of the traffic network maintenance are examined using the prediction results. are doing. Therefore, it is important to properly predict traffic demand when examining the contents of the development of the transportation network. In order to predict traffic demand, data obtained by acquiring traffic behavior (moving route, time of travel, etc.) in the area from many people (subjects) and statistically processing the obtained data is used. It is necessary to accurately acquire the traffic behavior of the subject in order to properly predict the traffic.

Hitherto, as a method of acquiring the traffic behavior of a subject, a questionnaire method has been adopted in which a questionnaire is given to the subject and the traffic behavior is filled in the questionnaire.

[0004]

However, since the subject writes his / her traffic behavior in the questionnaire based on his / her own memory, entry mistakes such as omission of entry or entry of a content different from the actual behavior are made. Was inevitable. In particular, many subjects remember the fact that they have moved from where to where, but do not accurately remember the travel route and time between them. Therefore, it has been difficult to obtain the correct traffic behavior of the subject by the conventional questionnaire method.

An object of the present invention is to pay particular attention to the progress of mobile position detection techniques using PHS, GPS, and the like, and to indicate the positions of mobile units that are temporally continuous and obtained by these position detection techniques. It is an object of the present invention to provide a data processing device capable of processing a plurality of position data and detecting a moving route of the moving object, and a recording medium storing a data processing program.

[0006]

The present invention has the following arrangement to solve the above-mentioned problems.

(1) A data processing device for detecting a moving route of a moving object based on a plurality of position data indicating a position of the moving object which is continuous in time, wherein the geographical area includes a traffic network such as a road or a railway. A storage unit storing information, and specifying a position for each of the plurality of position data, extracting a traffic network such as a road or a railroad existing within a predetermined range including the position for each position specified from the geographic information. A control unit for detecting a route connecting the positions indicated by the plurality of position data from the traffic network extracted here.

(2) The moving body is a subject, and the storage unit stores personal information such as the home and work addresses of the subject, and the control unit uses the personal information to execute the test on the subject. It has a moving purpose estimating function for estimating the moving purpose of the moving object.

(3) The control unit detects a moving speed of the moving body, and estimates a transportation means used for moving the moving body based on the moving speed and the traffic network detected as the moving route. It has a transportation mode estimation function.

In the above configuration (1), the position is specified for each of a plurality of position data indicating the position of the moving object that is temporally continuous, and the position exists within a predetermined range including the position for each specified position. A traffic network such as a road or a railroad is extracted, and a traffic network connecting between the positions indicated by two temporally continuous position data is detected. Thus, a traffic network connecting discretely detected positions can be detected, and thus a traffic network connecting between a position indicated by the earliest position data and a position indicated by the latest position data in time, that is, The moving route of the moving object is detected.

In the configuration (2), the purpose of the movement is estimated by using the personal information of the subject as the moving body.

In the configuration (3), the means of transportation used for the movement is estimated from the movement speed.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS PHS (Personal Handyphone Sys)
Position detection technology for detecting the position of a moving object using a GPS (Global Positioning System) or GPS (Global Positioning System) has already been put to practical use. Hereinafter, a position detection technique using PHS will be briefly described. FIG. 1 is a diagram showing a configuration of a position detection system using a PHS. In the figure,
Reference numeral 1 denotes a PHS carried by the subject. Since the PHS1 uses weak radio waves, the density of the base stations 2 (2-1 to 2-n) is high (in urban areas, the base stations are arranged approximately every 100 m. In addition, underground shopping centers, subway premises, buildings, etc.). It is located in various places.). Further, the PHS 1 always keeps track of the IDs of the base stations and the electric field strength for the plurality of base stations 2. Reference numeral 3 denotes a center, which has data for each base station in which an ID is associated with a position where the base station is located,
By acquiring IDs and electric field intensities of the plurality of base stations 2 known by the PHS 1, the position (latitude, longitude) of the PHS 1 at this timing (time) can be specified. 1 is a data processing device according to the embodiment of the present invention, and can acquire position data of the PHS 1 from the center 3 as described later.

The center 3 repeats P at appropriate timing.
By acquiring the above information (the ID of the base station 2 and the electric field strength) from the HS 1, it is possible to obtain a plurality of position data (time, latitude, longitude) indicating the position of the PHS 1 that is temporally continuous. For example, in the center 3, as shown in FIG.
A plurality of position data in which latitude and longitude are associated can be obtained. The date and time in this position data are the time when the center 3 obtained the above information from the PHS1;
The latitude and longitude are values calculated by the center 3 using the above information.

FIG. 3 is a block diagram showing the configuration of the data processing apparatus of this embodiment. The data processing device 10
A control unit 11 for controlling the operation of the main body, a storage unit 12 for storing a database or the like to be described later, an operation unit 13 provided with a keyboard or the like for performing an input operation, a display unit 14 for displaying a screen or the like accompanying input, A communication unit 15 for controlling communication with the center 3; The storage unit 12 has a geographic information database 21 in which geographic information is registered, and an I in which personal information is registered.
A D attribute database 22 and a facility database 23 in which information relating a facility (home or office) and a purpose of moving to the facility are registered are stored. In the geographic information database 21, traffic networks such as roads and railways are registered. In the ID attribute database 22, personal information such as a home address or a work address is registered for each subject.

Hereinafter, the operation of the data processing apparatus 10 according to this embodiment will be described. The data processing apparatus 10 of this embodiment can acquire the position data of the PHS 1 that is temporally continuous from the center 3 (that is, the position of the subject) by communicating with the center 3 in the communication unit 15.
The position data of the PHS1 shown in FIG. 2 includes not only the position data of the subject (PHS1) during the movement but also the position data when the subject (PHS1) is staying at an arbitrary place. On the other hand, the data processing device 10 of this embodiment
Is intended to detect the movement route of the subject, and if the following route detection processing is performed on the position data when the subject is not moving, the processing time becomes longer. For this reason, the subject (P
It is appropriate to extract the position data when the subject is moving from the position data of HS1), and to perform the above route detection processing only on the position data extracted here.

As a method of extracting the position data when the subject is moving from the position data of the subject (PHS1) in the center 3, for example, the distance between two temporally consecutive position data is a predetermined distance. When they are separated from each other, the position data may be extracted as the position data indicating the movement of the subject. Note that this processing may be performed by the data processing device 10 that has acquired the position data of the PHS1 from the center 3, or only the moving position data of the PHS1 after the center 3 has performed the above-described processing. May be transmitted.

FIG. 4 shows moving position data of a subject processed by the data processing apparatus of this embodiment. FIG. 4 shows two movements (trips) of the subject (sequence numbers 1 to 23 indicate the first movement of the subject, and sequence numbers 24 to 42 indicate the second movements). .). The position data between the sequence numbers 23 and 24 while the subject is staying (when not moving) is thinned out in the above processing.

FIG. 5 is a flowchart showing a path detecting process in the data processing device of this embodiment. This route detection processing is performed for each trip of the subject. When the position data of the subject at the time of the trip is plotted on the map,
As shown in FIG. 6 (A), the position of the moving subject is discretely shown. In this figure, a straight line indicates a transportation network such as a road or a railroad, and a rectangle indicates a position of the subject specified from the position data. As shown in FIG. 6 (B), the control unit 11 uses the map database 21 for each position data indicating the trip position of the subject, for a road or railroad within a radius d around the position indicated by the position data. A traffic network (traffic network indicated by a thick line) such as a (track) is extracted (n1, n2). Note that d is set in advance. When the above processing is performed for all the position data at the time of the trip, at least one or more traffic networks from the starting point of the trip (the position at which the subject has started moving) to the ending point of the trip (the position at which the subject has completed moving) are detected. It is determined whether or not it has been performed (n3). If no traffic network connecting the starting point and the end point is detected,
The above d is increased (assuming that d = d + ε (ε is set in advance)) (n4), and the processing after n1 is repeated.
When the value of d is increased, the traffic network extracted by n1 increases. By repeating this process, a traffic network connecting the start point and the end point is detected (see FIG. 6C).

Basically, as shown in FIG. 6D, the shortest route may be extracted as the moving route of the subject from the traffic network connecting the starting point and the end point extracted in the above processing. When the subject uses a railway as a means of transportation, the travel route of the subject may not be the shortest route of the traffic network connecting the starting point and the end point. Thus, the data processing apparatus 10 according to the present embodiment performs the following processing to determine the moving means of the subject.

Next, the control unit 11 controls the time series 2
A moving means discriminating process for discriminating a moving means (walk, car, train, etc.) between two pieces of position data is executed (n
5). FIG. 7 is a flowchart showing the moving means specifying process. The control unit 11 calculates a moving speed V between two temporally continuous position data (n11). Moving speed V
Is calculated by dividing the linear distance between two position data by the time difference between these two position data. The moving speed V calculated in n11 is a predetermined speed V1 (for example,
If it is less than 7 km / h), it is determined that the moving means of the subject is walking or cycling (n12 → n13). On the other hand, n1
The moving speed V calculated in step 1 is a preset speed V1.
If so, it is determined that the moving means of the subject is a car (including a bus) or a train (n12 → n14). When the above-mentioned processing is completed for all of the two consecutive time data (n15), the control unit 11 determines whether or not there is a vehicle or a train as the moving means in n14 (n16). If there is no place to perform, the subject determines that the means of transportation from the starting point to the ending point of the trip is on foot or by bicycle, and ends this processing.

Also, if there is a place where the moving means is a car or a train at n14, the trip start point and the end point of the trip (the position where the subject has completed the movement) at this place
It is determined whether or not a railway has been extracted as a transportation network connecting to (n17). If a railway has been extracted, it is determined that the transportation means during this period is a train (n18). Transportation by car (or bus)
Is determined (n19).

When the control unit 11 completes the determination of the moving means of the subject in the above-described processing, the control unit 11 determines that the section determined to be a train is a section that spans between three or more positions indicated by the position data. ), The boarding station and the getting off station of the subject are specified at both ends (n6). Here, when there is no station on at least one side of the section, and either the boarding station or the drop-off station cannot be specified, the control unit 11 determines that the moving means in this section is finally a car ( n9). If both the boarding station and the getting-off station are specified, the railroad network between the two stations is set as the movement route (n8). For other sections (sections other than the railway network), the shortest route road network is detected as the subject's travel route from the traffic networks extracted in the above processing (n10).

By the above processing, a moving route, a moving means, and the like between the positions indicated by a plurality of temporally continuous position data are detected (see FIG. 8). In this figure, a route No. is a serial number given in chronological order between two temporally consecutive position data, and a passing link is an identification number indicating a moving route therebetween. In addition, as shown in FIG. 9, the moving path of the subject can be displayed on the display unit 14.

In this way, the data processing device 10 detects the moving path of the subject from the temporally continuous position data. In addition, since the moving means (railroad use or the like) is determined based on the moving speed of the subject, the moving route of the subject can be detected with high accuracy.

The data processing device 10 of this embodiment
Estimates the purpose of the subject's movement from the facility at the end of the trip. For example, if the end point of the trip is the workplace of the subject, it is presumed that the trip was for the purpose of going to work.If the end point of the trip is the home of the subject, it is presumed that the trip was for the purpose of returning home. It is presumed that the trip is a free trip (trip for leisure) if it is a park instead of a destination or home. The address of the subject, such as his / her home and work place, is registered in the ID attribute database 22 as described above.

As described above, in the data processing apparatus 10 of this embodiment, if the position detection technique such as PHS is used, the moving route of the subject can be accurately detected, and therefore, when predicting the traffic demand, Appropriate data can be obtained. Further, since the moving purpose of the subject is also estimated, it can be effectively used as data for predicting traffic demand.

In the above embodiment, the moving data of the subject is detected by processing the position data of the moving object obtained by the position detecting technique using the PHS. May be position data detected by another position detection technology such as GPS.

The input of the position data to the data processing device 10 may be performed using a recording medium such as a floppy disk (FD), or the operator may input the data by operating a keyboard or the like. You may.

[0030]

As described above, according to the present invention, it is possible to accurately detect the moving route of a moving object from the position data indicating the position of the moving object which is temporally continuous. As a result, the traffic behavior of the subject required for the prediction of the traffic demand can be easily obtained, and the appropriate traffic demand can be predicted.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a technology for detecting the position of a moving object using a PHS.

FIG. 2 is a diagram illustrating position data of a moving object detected by a moving object position detection technique using PHS.

FIG. 3 is a data processing apparatus 10 according to an embodiment of the present invention;
FIG. 3 is a diagram showing the configuration of FIG.

FIG. 4 is a diagram showing position data of a moving object processed by the data processing device according to the embodiment of the present invention;

FIG. 5 is a flowchart showing a movement route detection process in the data processing device according to the embodiment of the present invention.

FIG. 6 is a diagram illustrating a movement route detection process.

FIG. 7 is a flowchart showing a moving means determination process in the data processing device according to the embodiment of the present invention.

FIG. 8 is a diagram showing processing result data of a movement route detection process in the data processing device according to the embodiment of the present invention.

FIG. 9 is a diagram illustrating a display example of a processing result of a movement route detection process in the data processing device according to the embodiment of the present invention.

[Explanation of symbols]

 1-PHS 2-base station 3-center 10-data processing device 11-control unit 12-storage unit 13-operation unit 14-display unit 15-communication unit 21-geographic information database 22-ID attribute database 22 23-facility database 23

Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FIG06F 15/62 335 (72) Inventor Atsushi Tanabe 1-1-11 Tsuriganecho, Chuo-ku, Osaka-shi Inside Urban Traffic Planning Institute, Inc. (56) References JP-A-10-232992 (JP, A) JP-A-10-260244 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G08G 1/00-1/16

Claims (4)

(57) [Claims] 1. A data processing device for detecting a moving route of a moving object based on a plurality of position data indicating a position of the moving object which is continuous in time, wherein the geographic information includes a traffic network such as a road or a railway. And a storage unit for storing a position, specifying a position for each of the plurality of position data, extracting a traffic network such as a road or a railroad existing within a predetermined range including the position for each position specified from the geographic information, A control unit for detecting a route connecting the positions indicated by the plurality of position data from the traffic network extracted here. 2. The method according to claim 1, wherein the moving body is a subject, the storage unit stores personal information such as a home and work address of the subject, and the control unit uses the personal information to identify the subject. The data processing device according to claim 1, further comprising a movement purpose estimation function for estimating a movement purpose. 3. The control unit detects a moving speed of the moving body, and estimates traffic means used for moving the moving body based on the moving speed and a traffic network detected as the moving route. 3. The data processing device according to claim 1, further comprising a means estimating function. 4. A recording medium storing a data processing program for detecting a moving path of a moving object based on a plurality of position data indicating a position of the moving object which is continuous in time, wherein: A second step of extracting a traffic network, such as a road or a railroad, existing within a predetermined range including the position from the geographic information for each of the specified positions; A third step of detecting a path connecting the positions indicated by the plurality of position data from the network, and a third step of recording the data processing program.