JP2013170944A - Portable device for determining stop station in train traveling underground - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable device for determining a stop station in a train traveling underground.SOLUTION: The portable device includes: an atmospheric pressure sensor for measuring air pressure; an air pressure database for storing reference air pressure data including time series of air pressure values in a train traveling from a first station to a second station and corresponding to a group of the first station and the second station adjacent to the first station in each group of respective stations; state determination means for determining whether the train is in a stop state or a traveling state; first similarity calculation means for calculating similarity of respective reference air pressure data corresponding to measurement air pressure data by executing correlation between the measurement air pressure data to be time series of a plurality of air pressure values measured by the air pressure sensor during a traveling state up to the stop state when the train becomes the stop state and each reference air pressure data stored in the air pressure database; and station determination means for determining a stop station from a group of stations corresponding to the reference air pressure data having the highest similarity out of similarity values calculated by the first similarity calculation means.

Description

  The present invention relates to a technique for determining a stop station in a train running underground.

  For example, Non-Patent Document 1 discloses positioning using GPS (Global Positioning System). However, there is a problem that GPS cannot be used indoors and underground. On the other hand, Non-Patent Documents 2 and 3 disclose configurations for performing positioning indoors or underground. However, the wireless base station is arranged at a place where positioning is required, and the installation and operation cost of the wireless base station becomes a problem. Non-Patent Document 4 discloses a configuration for performing positioning without requiring an infrastructure facility such as a wireless base station. Specifically, positioning is performed autonomously using an acceleration sensor and a geomagnetic sensor. Non-Patent Document 1 also discloses a configuration for estimating a user's location based on information obtained from a geomagnetic sensor.

B. Hofmann-Wellenhof, et al. , "Global Positioning System: Theory and Practice", 1997 Bahl, P., et al. , "RADAR: In-Building RF-based User Lo-cation and Tracking System," Proceedings of the 19th Annual Conference of the IFE Computer and Co-op. 775-784, 2000 Inje Lee, et al. , "WiFi-based Subway Navigation System," Proceedings of International Microwave Workshops on Intelligent Radiofor Future Pers. 43-46, August 2011 Ulf Blanke, et al. , "South by South-East or setting at the desk. Can orientation be a place ?," Proceedings of The 15th Annual Symposium on Weal 11

  For example, it may be difficult for travelers from overseas to determine where the current stop is when they are on an unfamiliar Japanese subway. In such a case, it is convenient if a portable device such as a mobile phone or PDA possessed by the traveler determines the current station and displays it together with the subway map. Also, when notifying the network side of the position of the owner of a mobile phone or the like and providing a service to be performed using that position, for example, notifying the network side of the current stop station even when taking the subway Thus, continuous service provision may be possible. Specifically, when the schedule is disturbed due to an accident or a train failure, an appropriate route or the like can be provided to the owner of the portable device based on the current stop station.

  However, signals from GPS do not reach the basement, and positioning by GPS is not possible when getting on the subway. The techniques described in Non-Patent Documents 2 and 3 require infrastructure equipment such as a radio base station. Furthermore, the technologies described in Non-Patent Documents 1 and 4 do not require infrastructure equipment such as a radio base station, but the geomagnetic disturbance is large in the underground such as in a subway train. It is difficult to apply.

  The present invention provides a portable device that determines a station that stops in a train running underground.

The portable device according to the present invention is
A portable device for determining a station that stops in a subway train, the pressure sensor for measuring atmospheric pressure, and a first station and a station of a second station adjacent to the first station. A barometric pressure database that stores reference barometric pressure data corresponding to a set of stations including a time series of barometric pressure values in the vehicle while traveling from one station to the second station, and the train is in a stopped state Or a state determination unit that determines whether the vehicle is in a traveling state, and a measurement that is a time sequence of a plurality of pressure values measured by the atmospheric pressure sensor during a traveling state until the vehicle stops when the vehicle is stopped First similarity calculation means for calculating the similarity of each reference atmospheric pressure data to the measured atmospheric pressure data by executing correlation between the atmospheric pressure data and each reference atmospheric pressure data in the atmospheric pressure database, and the first similarity calculation means The degree of similarity calculated by , Characterized in that it comprises the most similarity from a corresponding set of the station is higher reference atmospheric pressure data, and the station determining means for determining the station that parked, the.

The portable device according to the present invention is
A portable device for determining a station that stops in a subway train, the pressure sensor for measuring atmospheric pressure, and a first station and a station of a second station adjacent to the first station. Reference pressure data corresponding to a set of stations including a difference sequence of two adjacent pressure values in a time sequence of pressure values in the vehicle while traveling from one station to the second station, for each set of stations The atmospheric pressure database to be stored, the state determination means for determining whether the train is in a stopped state or a traveling state, and when the vehicle is stopped, the atmospheric pressure sensor measures between the traveling state until the stopping state. A correlation between the measured atmospheric pressure data, which is a difference sequence between two adjacent atmospheric pressure values, and each reference atmospheric pressure data in the atmospheric pressure database, and each reference atmospheric pressure with respect to the measured atmospheric pressure data. Calculate the similarity of data 1 similarity calculation means, and station determination means for determining a station that stops from a set of stations corresponding to the reference pressure data having the highest similarity among the similarities calculated by the first similarity calculation means It is characterized by providing.

The portable device according to the present invention is
A portable device for determining a station that stops in a subway train, the pressure sensor for measuring atmospheric pressure, and a first station and a station of a second station adjacent to the first station. An atmospheric pressure database that holds a reference atmospheric pressure difference corresponding to a set of stations, which is a difference in atmospheric pressure when the vehicle stops at one station and the second station, for each set of stations; State determination means for determining whether the train is in a stopped state or a traveling state, and when the train is in a stopped state, the atmospheric pressure value measured by the atmospheric pressure sensor and the atmospheric pressure value measured by the atmospheric pressure sensor in the previous stopped state A second similarity calculation unit that calculates a similarity from an absolute value of a difference between a measured atmospheric pressure difference that is a difference between the measured atmospheric pressure difference and each reference atmospheric pressure difference of the atmospheric pressure database, and a similarity calculated by the second similarity calculation unit Corresponding to the standard pressure difference with the highest similarity From the set, characterized in that it and a station determining means for determining the station being stopped.

The portable device according to the present invention is
A portable device for determining a station that stops in a subway train, the pressure sensor for measuring atmospheric pressure, and a first station and a station of a second station adjacent to the first station. Reference atmospheric pressure data corresponding to a set of stations including a time series of atmospheric pressure values while traveling from one station to the second station, and when stopped at the first station and the second station The atmospheric pressure database that holds the reference atmospheric pressure difference corresponding to the set of stations, which is the difference in atmospheric pressure when the vehicle is stopped at each station set, and the train is in a stopped state or in a traveling state State determination means for determining whether or not when the vehicle is in a stopped state, measured atmospheric pressure data that is a time sequence of a plurality of atmospheric pressure values measured by the atmospheric pressure sensor during the traveling state until the vehicle stops. Perform a correlation with each reference barometric pressure data to measure First similarity calculation means for calculating first similarity of each reference atmospheric pressure data with respect to pressure data, and an atmospheric pressure value measured by the atmospheric pressure sensor when the vehicle is stopped and an atmospheric pressure value measured by the atmospheric pressure sensor when the vehicle is stopped last time Second similarity calculation means for calculating the second similarity from the absolute value of the difference between the measured atmospheric pressure difference, which is the difference between each and the reference atmospheric pressure difference in the atmospheric pressure database, and the first similarity of the set of corresponding stations And station determination means for calculating a total similarity for the set of stations from the second similarity and determining a station that is stopped from the set of stations having the highest total similarity. To do.

The portable device according to the present invention is
A portable device for determining a station that stops in a subway train, the pressure sensor for measuring atmospheric pressure, and a first station and a station of a second station adjacent to the first station. Reference pressure data corresponding to a set of stations including a difference sequence of two adjacent pressure values in a time sequence of pressure values in the vehicle while traveling from one station to the second station, and the first station A barometric pressure database that stores a reference barometric pressure difference corresponding to a set of the stations, which is a difference between the barometric pressures in the vehicle when the car stops at the second station, and the train A time sequence of a plurality of barometric pressure values measured by the barometric sensor during the driving state until the vehicle stops when the vehicle is stopped. Of measured atmospheric pressure data, which is a difference sequence between two adjacent atmospheric pressure values, and the previous A first similarity calculating means for calculating a first similarity of each reference atmospheric pressure data with respect to the measured atmospheric pressure data by executing correlation with each reference atmospheric pressure data in the atmospheric pressure database; The second similarity is calculated from the absolute value of the difference between the measured atmospheric pressure value, which is the difference between the measured atmospheric pressure value and the atmospheric pressure value measured by the atmospheric pressure sensor in the previous stop state, and each reference atmospheric pressure difference in the atmospheric pressure database. The total similarity for the station set is calculated from the two similarity calculation means and the first similarity and the second similarity of the corresponding station set, and the vehicle is stopped from the station set having the highest total similarity. Station determination means for determining a station.

  Without using equipment such as a base station, it is possible to determine a station that stops in a route that runs underground.

The block diagram of the portable apparatus by one Embodiment. The figure which shows the time change of the atmospheric | air pressure in a subway line. The figure which shows the time change of the atmospheric pressure between 1 subway stations. The figure which shows the difference of the atmospheric pressure between stations.

  Hereinafter, an exemplary embodiment of the present invention will be described in detail with reference to the drawings. In each drawing used for explanation, components that are not necessary for understanding the invention are omitted.

  FIG. 2 shows measured values of pressure change with respect to time when boarding from Ogikubo Station to Ikebukuro Station on the Subway Marunouchi Line and changes in pressure with respect to time when boarding from Nishimagome Station to Oshiage Station on the Subway Asakusa Line. Note that since time is related to distance, FIG. 2 is also an actual measurement value of atmospheric pressure change with respect to the distance from the starting point. As shown in the example of FIG. 2, since the change in the height of the route differs depending on the route, the change in the atmospheric pressure with respect to time (distance) differs depending on the route. FIG. 3 shows measured values of changes in atmospheric pressure with respect to time (distance) when boarding from adjacent A station to B station and when boarding from adjacent C station to D station. As shown in FIG. 3, the change in atmospheric pressure between adjacent stations also differs between adjacent stations.

  (First Embodiment) In this embodiment, a barometric pressure measured at a predetermined interval during traveling is used for determining a stop station. For this reason, the atmospheric pressure measured at predetermined time intervals between two adjacent stations on the subway line is stored as a database in the atmospheric pressure database and stored in the portable device. More specifically, the barometric pressure data including a plurality of barometric time values measured at predetermined time intervals from the departure from the first station to the arrival at the next second station is obtained from the first station. Stores corresponding to the set of stations from to the second station. Note that the set of stations from the first station to the second station and the set of stations from the second station to the first station are different sets of stations. Moreover, even if it is a group from the same first station to the second station, it is a different group if the route is different. That is, the atmospheric pressure database is a database having atmospheric pressure data including a time series of a plurality of atmospheric pressure values for a set of stations in consideration of a route and two adjacent directions. Hereinafter, the second station in the set of stations is referred to as an arrival station, and the atmospheric pressure data for each station set included in the atmospheric pressure database is referred to as reference atmospheric pressure data.

  The portable device measures the atmospheric pressure at the same time interval as the reference atmospheric pressure data when getting on the subway, and determines the reference atmospheric pressure data closest to the atmospheric pressure data measured from the previous station when stopping. Then, the portable device determines the arrival station of the set of stations corresponding to the determined closest reference atmospheric pressure data as the currently stopped station. Details will be described below.

  FIG. 1 is a functional configuration diagram of a portable device 10 according to the present embodiment. In addition, the determination process of the stop station demonstrated below is started by the input which shows the start of the determination process from the user of the portable apparatus 10, for example. As described above, the atmospheric pressure database 1 is a database having reference atmospheric pressure data for each set of stations on an underground route. The time interval at which each atmospheric pressure value of the reference atmospheric pressure data is acquired is hereinafter referred to as a data cycle. For example, if the data cycle is 2 seconds and the traveling time between certain stations is 1 minute, 30 atmospheric pressure values are included in the reference atmospheric pressure data between the stations. In addition, each atmospheric | air pressure value of each reference | standard atmospheric | air pressure data is the vector data arranged in the time order.

  The atmospheric pressure sensor 2 measures the atmospheric pressure at every sampling period specified by a control unit (not shown). Note that the sampling period of the atmospheric pressure sensor 2 is preferably equal to or greater than the data period, for example, an integral multiple of the data period. The state determination unit 3 determines whether the vehicle is currently stopped or traveling from the change in the atmospheric pressure value measured by the atmospheric pressure sensor 2. Specifically, for example, if the difference between the average of the past k atmospheric pressure values sampled by the atmospheric pressure sensor 2 and the latest atmospheric pressure value exceeds a threshold value, it is determined that the vehicle is in a running state if it continues for a certain number of times. Otherwise, it is determined that the vehicle is stopped. Conversely, if the difference between the average of the past k atmospheric pressure values sampled by the atmospheric pressure sensor 2 and the latest atmospheric pressure value is within the threshold value, it is determined that the vehicle is stopped if it continues for a certain number of times. If it is, it can also determine with it being a driving | running | working state. In addition, the determination criterion for the transition from the stopped state to the traveling state may be different from the criterion for determining from the traveling state to the stopped state. Further, the determination of the stop state and the running state may be performed by using another measurement method such as an accelerometer instead, or may be used in combination.

  When the first similarity calculation unit 4 enters the stop state, the atmospheric pressure data sampled by the atmospheric pressure sensor 2 during the traveling state from the previous stop state to the current stop state, and each reference atmospheric pressure data in the atmospheric pressure database 1 And the degree of similarity is calculated. The station determination unit 6 determines the current stop station from the reference atmospheric pressure data having the highest similarity among the similarities calculated by the first similarity calculation unit 4. Specifically, an arrival station of a set of stations corresponding to the reference air pressure data having the highest similarity is determined as a currently stopped station. The display unit 7 displays the station determined by the station determination unit 6 together with a route map, for example. Note that the second similarity calculation unit 5 is not used in the present embodiment.

  Next, the calculation of the similarity in the first similarity calculation unit 4 will be described. The first similarity calculation unit 4 determines whether the state output by the state determination unit 3 is changed from the atmospheric pressure sensor 2 after the state changes from the stop state to the travel state until the state changes again to the stop state. Get barometric pressure value. When the sampling period of the atmospheric pressure sensor 2 is faster than the data period, only the atmospheric pressure value that matches the data period is selected from the atmospheric pressure values acquired from the atmospheric pressure sensor 2, or the atmospheric pressure value that matches the data period is obtained by interpolation. . For example, assuming that the data period is 2 seconds and the sampling period is 1 second, the first similarity calculation unit 4 calculates the even-numbered atmospheric pressure value among the atmospheric pressure values output from the atmospheric pressure sensor 2 after the running state. To get. Hereinafter, data including a time sequence of a plurality of atmospheric pressure values for each data cycle, which is obtained by selection or interpolation from the atmospheric pressure sensor 2 while traveling between stations where the first similarity calculation unit 4 is located, is referred to as measured atmospheric pressure data. And

Subsequently, the first similarity calculation unit 4 obtains a correlation between the measured atmospheric pressure data and each reference atmospheric pressure data in the atmospheric pressure database 1. Specifically, the sum of absolute values of the difference between the corresponding atmospheric pressure values of the measured atmospheric pressure data and the reference atmospheric pressure data is obtained. Here, the corresponding atmospheric pressure value is data at the same position in the time sequence. For example, the time series of the atmospheric pressure values of the measured atmospheric pressure data is (x ₁ , x ₂ ,..., X _n ), and the time examples of the atmospheric pressure values of certain reference atmospheric pressure data are (y ₁ , y ₂ ,. .., Y _n ). In this case, the first similarity calculation unit 4
| X ₁ −y ₁ | + | x ₂ −y ₂ | +... + | X _n −y _n |
Is the similarity.

In addition, the time example of the atmospheric pressure value of the reference atmospheric pressure data is (y ₁ , y ₂ ,..., Y _m ), and when n <m, the first similarity calculation unit 4 calculates x _{n + 1} to x _m. The similarity is calculated with the value of 0 as 0. That means
_{| X 1 -y 1 | + ···} + | x n -y n | + | 0-y n + 1 | + ··· + | 0-y m |
Is the similarity. Similarly, the first similarity calculation unit 4, if n> _m, the similarity is calculated as 0 the value of _{y n} from _{y m + 1.} Thus, in this embodiment, the lower the similarity value, the higher the similarity. The calculation of the similarity is not limited to the absolute value of the difference, and may be the sum of the squares of the differences. Further, when drawing a graph with time on the horizontal axis and pressure on the vertical axis, the difference between the pressure value graph measured by the pressure sensor 2 and the pressure value graph stored in the pressure database 1 is Any method that increases the similarity as the number decreases can be used to calculate the similarity. Further, for example, a learning estimation algorithm using machine learning can be used. In any case, the first similarity calculation unit 4 calculates the similarity from the correlation between the reference atmospheric pressure data and the measured atmospheric pressure data between the stations, and the station determination unit 6 determines the current stop station from the similarity. judge.

In the above embodiment, the similarity is calculated using the measured value of the atmospheric pressure, but the difference between the atmospheric pressure values of adjacent times can also be used. That is, the measured atmospheric pressure data is (x ₁ , x ₂ ,..., X _n ), and the reference atmospheric pressure data between stations in the atmospheric pressure database 1 is (y ₁ , y ₂ ,..., Y _n ). In this case, (x ₂ −x ₁ , x ₃ −x ₂ ,..., X _n −x _n−1 ) and (y ₂ −y ₁ , y ₃ −y ₂ ,..., Y _n −y The correlation value with _n−1 ) is defined as the similarity. Although the absolute value of the atmospheric pressure varies with time, the difference between temporally adjacent atmospheric pressure values cancels out the absolute value of atmospheric pressure and represents a difference in height, so this value does not vary with time. Therefore, it becomes possible to determine the current stop station more accurately. If the number of pressure values in the measured pressure data is different from the number of pressure values in the reference pressure data when the difference is obtained, the smaller pressure value is the same as above. It shall be 0. Moreover, when calculating | requiring by a difference, the form which sets each reference | standard atmospheric | air pressure data of the atmospheric | air pressure database 1 beforehand as the difference row | line | column of the time series of the atmospheric | air pressure value between stations may be sufficient.

Furthermore, in the said embodiment, although the stop station was determined from the measured atmospheric pressure data between 1 station, the measured atmospheric pressure data in the group of a several continuous station can be used. For example, it is assumed that the stop station is determined from the measured atmospheric pressure data between the past three stations. In this case, on a certain route, the stations stop in the order of stations Y _i-3 , Y _i-2 , Y _i-1 , Y _i , and the measured barometric pressure data between the three stations before and the station Y, The correlation with the reference atmospheric pressure data between the stations from _i-3 to Y _i-2 is C _i-2, and the measured atmospheric pressure data between the two previous stations and the station Y _i-2 The correlation with the reference barometric pressure data between stations to Y _i-1 is C _i-1 , the measured barometric pressure data between the current stop station from the previous one, and the station from station Y _i-1 to Y _i If the correlation with the reference atmospheric pressure data is C _i , the similarity can be obtained by C _i−2 × C _i−1 × C _i . It should be noted that simply by adding the absolute value of the difference between the barometric pressure data in the traveling state from the previous three stop stations to the current stop station and the reference barometric pressure data from the stations Y _i-3 to Y _i , that is, C You may obtain _| require by _i-2 + Ci _-1 + Ci. By using data between a plurality of stations, it is possible to increase the accuracy of determination as compared to determining independently for each adjacent station.

  (Second Embodiment) Next, the second embodiment will be described with a focus on differences from the first embodiment. As shown in FIG. 4, since the altitude of the station is not constant, the difference in atmospheric pressure measured at the time of stopping at each of the two adjacent stations reflects the difference in altitude between the adjacent stations. In the present embodiment, the current stop station is determined from the difference in pressure measured at the time of stop. The configuration of the mobile device in the present embodiment is as shown in FIG. 1, but in the present embodiment, the first similarity calculation unit 4 is not used, and the second similarity calculation unit 5 is used instead. In the present embodiment, the atmospheric pressure database 1 has a value obtained by subtracting the atmospheric pressure value measured at the first station at the time of stopping from the atmospheric pressure value measured at the second station next to the first station at the time of stopping. Stored in association with a set of 1 station and 2nd station. Hereinafter, the second station will be referred to as an arrival station, and the atmospheric pressure difference for each station set included in the atmospheric pressure database will be referred to as a reference atmospheric pressure difference.

  The second similarity calculation unit 5 acquires the atmospheric pressure data sampled by the atmospheric pressure sensor 2 when the vehicle is stopped, and subtracts the atmospheric pressure value acquired by the atmospheric pressure sensor 2 during the previous stationary state from the acquired value. Find the difference. In addition, the structure which subtracts the value acquired this time from the atmospheric | air pressure value which the atmospheric | air pressure sensor 2 acquired at the time of the last stop state may be sufficient as a measurement atmospheric | air pressure difference. Thereafter, the second similarity calculation unit 5 obtains the absolute value of the difference between each reference atmospheric pressure difference and the measured atmospheric pressure difference that the atmospheric pressure database 1 has and sets it as the similarity. Thus, the lower the similarity value, the higher the similarity. The station determination unit 6 determines the arrival station of the set of stations corresponding to the reference atmospheric pressure difference indicating the highest similarity among the similarities calculated by the second similarity calculation unit 5 as the current stop station, and the display unit 7 displays the station which the station determination part 6 determined, for example with a route map.

In the present embodiment as well, data between a plurality of past stations can be used. For example, on a certain line, the stations stop in the order of stations Y _i-3 , Y _i-2 , Y _i-1 , Y _i , and the measured atmospheric pressure difference at the stop station three and two stops before the station Y _i- The absolute value of the difference between the reference pressure difference for the set of ₃ and Y _i-2 is D _i-2 , the measured atmospheric pressure difference at the previous and second stop stations, and the stations Y _i-2 and Y _i The absolute value of the difference between the reference atmospheric pressure difference for the set of _-1 is D _i-1 , the measured atmospheric pressure difference at the previous and current stop stations, and the reference atmospheric pressure difference for the set of stations Y _i-1 and Y _i Assuming that the absolute value of the difference with D _i is D _i , the similarity can be obtained by D _i−2 × D _i−1 × D _i or D _i−2 + D _i−1 + D _i .

(Third embodiment) Next, a third embodiment will be described. This embodiment is a combination of the first embodiment and the second embodiment. That is, if the similarity to a set of stations calculated by the first similarity calculation unit 4 is C, and the similarity to the same station set calculated by the second similarity calculation unit 4 is D, the total similarity is
Total similarity = αC + βD
Is what you want. Α and β are weighting coefficients of the similarity obtained from the measured value in the running state and the similarity obtained from the measured value in the stopped state, and the values can be determined by an arbitrary method.

  The portable device according to the present invention can be realized by a program that causes a computer to operate as the portable device. These computer programs can be stored in a computer-readable storage medium or distributed via a network.

Claims (12)

A portable device for determining a station that stops in an underground train,
An atmospheric pressure sensor for measuring atmospheric pressure;
For a set of stations of the first station and the second station adjacent to the first station, the set of stations including a time train of atmospheric pressure values while traveling from the first station to the second station. An atmospheric pressure database that holds corresponding reference atmospheric pressure data for each station set;
State determination means for determining whether the train is in a stopped state or a traveling state;
When the vehicle is stopped, a correlation between measured atmospheric pressure data, which is a time series of a plurality of atmospheric pressure values measured by the atmospheric pressure sensor during the traveling state until the stationary state, and each reference atmospheric pressure data of the atmospheric pressure database is executed. A first similarity calculating means for calculating the similarity of each reference atmospheric pressure data with respect to the measured atmospheric pressure data;
Among the similarities calculated by the first similarity calculating means, a station determining means for determining a station that stops from a set of stations corresponding to the reference air pressure data having the highest similarity,
A portable device comprising: The first similarity calculation means performs a correlation between a difference sequence between two pressure values adjacent in time in the measured atmospheric pressure data and a difference sequence between two pressure values adjacent in time in the reference atmospheric pressure data, and is similar Calculate the degree,
The portable device according to claim 1. A portable device for determining a station that stops in an underground train,
An atmospheric pressure sensor for measuring atmospheric pressure;
Two adjacent atmospheric pressures in a time series of atmospheric pressure values while traveling from the first station to the second station for a set of the first station and the second station adjacent to the first station An atmospheric pressure database that holds reference atmospheric pressure data corresponding to a set of stations including a difference column of values for each set of stations;
State determination means for determining whether the train is in a stopped state or a traveling state;
When the vehicle stops, the measured atmospheric pressure data, which is a difference sequence between two adjacent atmospheric pressure values, in the time sequence of a plurality of atmospheric pressure values measured by the atmospheric pressure sensor during the traveling state until the stationary state, and the atmospheric pressure First similarity calculation means for executing a correlation with each reference atmospheric pressure data in the database and calculating a similarity of each reference atmospheric pressure data with respect to the measured atmospheric pressure data;
Among the similarities calculated by the first similarity calculating means, a station determining means for determining a station that stops from a set of stations corresponding to the reference air pressure data having the highest similarity,
A portable device comprising: The first similarity calculation means includes each measured atmospheric pressure data measured by the atmospheric pressure sensor during a running state in a predetermined number of consecutive station sets, and each reference atmospheric pressure corresponding to the predetermined number of consecutive station sets. Perform correlation with data to find similarity
The portable device according to any one of claims 1 to 3. A portable device for determining a station that stops in an underground train,
An atmospheric pressure sensor for measuring atmospheric pressure;
About the set of stations of the first station and the second station adjacent to the first station, it is the difference in the atmospheric pressure inside the vehicle when stopping at the first station and when stopping at the second station. A barometric pressure database that holds a reference barometric pressure difference corresponding to a set of stations for each set of stations;
State determination means for determining whether the train is in a stopped state or a traveling state;
When the vehicle stops, the absolute difference between the measured atmospheric pressure difference, which is the difference between the atmospheric pressure value measured by the atmospheric pressure sensor and the atmospheric pressure value measured by the atmospheric pressure sensor during the previous stationary state, and each reference atmospheric pressure difference in the atmospheric pressure database. Second similarity calculating means for calculating the similarity from the value;
Among the similarities calculated by the second similarity calculating means, a station determining means for determining a station that is stopped from a set of stations corresponding to a reference atmospheric pressure difference having the highest similarity,
A portable device comprising: The second similarity calculation means obtains a measured atmospheric pressure difference and a reference atmospheric pressure difference and an absolute value of the difference in each of a predetermined number of consecutive station sets, and uses the sum or product of the obtained absolute values as the similarity.
The portable device according to claim 5. A portable device for determining a station that stops in an underground train,
An atmospheric pressure sensor for measuring atmospheric pressure;
For a set of stations of the first station and the second station adjacent to the first station, the set of stations including a time train of atmospheric pressure values while traveling from the first station to the second station. Corresponding reference atmospheric pressure data and a reference atmospheric pressure difference corresponding to a set of the stations, which is a difference between the atmospheric pressures when the vehicle stops at the first station and the second station, An atmospheric pressure database for a set of
State determination means for determining whether the train is in a stopped state or a traveling state;
When the vehicle is stopped, a correlation between measured atmospheric pressure data, which is a time series of a plurality of atmospheric pressure values measured by the atmospheric pressure sensor during the traveling state until the stationary state, and each reference atmospheric pressure data of the atmospheric pressure database is executed. A first similarity calculating means for calculating a first similarity of each reference atmospheric pressure data with respect to the measured atmospheric pressure data;
When the vehicle stops, the absolute difference between the measured atmospheric pressure difference, which is the difference between the atmospheric pressure value measured by the atmospheric pressure sensor and the atmospheric pressure value measured by the atmospheric pressure sensor during the previous stationary state, and each reference atmospheric pressure difference in the atmospheric pressure database. Second similarity calculation means for calculating the second similarity from the value;
Station determination means for calculating the total similarity for the station set from the first similarity and the second similarity of the corresponding station set, and determining the station that is stopped from the station set having the highest total similarity When,
A portable device comprising: A portable device for determining a station that stops in an underground train,
An atmospheric pressure sensor for measuring atmospheric pressure;
Two adjacent atmospheric pressures in a time series of atmospheric pressure values while traveling from the first station to the second station for a set of the first station and the second station adjacent to the first station A reference atmospheric pressure data corresponding to a set of the station including a difference sequence of values, and a difference between the atmospheric pressure in the vehicle when the vehicle stops at the first station and the second station. A barometric pressure database that holds a reference barometric pressure difference corresponding to a set of each station for
State determination means for determining whether the train is in a stopped state or a traveling state;
When the vehicle stops, the measured atmospheric pressure data, which is a difference sequence between two adjacent atmospheric pressure values, in the time sequence of a plurality of atmospheric pressure values measured by the atmospheric pressure sensor during the traveling state until the stationary state, and the atmospheric pressure First similarity calculation means for executing a correlation with each reference atmospheric pressure data in the database and calculating a first similarity of each reference atmospheric pressure data with respect to the measured atmospheric pressure data;
When the vehicle stops, the absolute difference between the measured atmospheric pressure difference, which is the difference between the atmospheric pressure value measured by the atmospheric pressure sensor and the atmospheric pressure value measured by the atmospheric pressure sensor during the previous stationary state, and each reference atmospheric pressure difference in the atmospheric pressure database. Second similarity calculation means for calculating the second similarity from the value;
Station determination means for calculating the total similarity for the station set from the first similarity and the second similarity of the corresponding station set, and determining the station that is stopped from the station set having the highest total similarity When,
A portable device comprising: The total similarity is a sum of a value obtained by multiplying the first similarity by a first weighting factor and a value obtained by multiplying the second similarity by a second weighting factor.
The portable device according to claim 7 or 8. The first similarity calculation means includes each measured atmospheric pressure data measured by the atmospheric pressure sensor during a running state in a predetermined number of consecutive station sets, and each reference atmospheric pressure corresponding to the predetermined number of consecutive station sets. Perform correlation with the data to obtain the first similarity,
The second similarity calculation means obtains the measured atmospheric pressure difference, the reference atmospheric pressure difference, and the absolute value of the difference in each of the predetermined number of consecutive station sets, and calculates the sum or product of the obtained absolute values as the second similarity degree. And
The portable device according to any one of claims 7 to 9. The state determination means determines whether the vehicle is in a stopped state or a traveling state from a change in atmospheric pressure measured by the atmospheric pressure sensor.
The portable device according to claim 1.   The program which operates a computer as a portable apparatus of any one of Claim 1 to 11.

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