JP7111861B2 - Information processing device, information processing method and program - Google Patents

Description

The present invention relates to an information processing device, an information processing method, and a program.

In recent years, mobile terminals having positioning functions such as GPS (Global Positioning System) and autonomous navigation have become widespread. The positioning function based on autonomous navigation uses various sensors (eg, a geomagnetic sensor, a gyro sensor, and an acceleration sensor) to determine positions in locations where GPS positioning cannot be performed, such as underground or indoors.

Generally, in autonomous navigation, the number of steps taken by the user is measured, and the distance traveled is calculated by multiplying the number of steps by a predetermined stride length. However, when the user uses stairs on a route, the distance traveled by one step differs between when walking up and down stairs and when walking normally. An error will occur in the actual movement distance.

In Patent Document 1, the user's position on the recommended route is estimated by using the walking distance measured based on the user's number of steps and a predetermined step length as the moving distance on the recommended route, and when the estimated position reaches the end point of the stairs, A navigation device is described that updates the estimated current position by subtracting "the number of stairs x 80 cm - the length of the stairs" from the distance traveled.

Japanese Patent Application Laid-Open No. 2012-215408

However, the navigation device described in Patent Literature 1 cannot be applied when information on the number of stairs and the length of stairs is not registered in advance. In addition, since the distance traveled was subtracted and the estimated current position was updated when the use of the stairs was completed, it was unnatural that the current position suddenly regressed near the end of the stairs when viewed on the screen of the navigation device. The screen display was

Therefore, the object of the present invention is to correct the error between the actual travel distance and the positioning result by autonomous navigation when using stairs while moving on a guidance route, and to correct the error between the actual movement distance and the positioning result by autonomous navigation, and to make it look natural on the guidance screen. It is to realize the display.

An information processing device according to the present invention is an information processing device for estimating a position of a user on a guidance route, wherein the distance traveled by the user is specified based on information on the movement of the user detected by a sensor. and a positioning information acquisition unit that acquires positioning information including information on whether or not to use stairs; and a position estimating unit that estimates the distance traveled by the user included in the positioning information when the positioning information includes information indicating that the stairs were used. Based on this information, the estimated moving distance while using the stairs is calculated, and the position of the user on the guidance route is estimated using the estimated moving distance.

An information processing method according to the present invention is an information processing method for estimating a position of a user on a guidance route, wherein the distance traveled by the user is specified based on information on the movement of the user detected by a sensor. and obtaining positioning information including information on whether or not stairs are used; and estimating the position of the user on the guidance route based on information on the distance traveled by the user included in the positioning information. and, in the step of estimating the user's position, if the positioning information includes information indicating that the stairs were used, the distance traveled by the user included in the positioning information. Based on the information, an estimated moving distance while using the stairs is calculated, and the position of the user on the guidance route is estimated using the estimated moving distance.

A program according to the present invention causes a computer that estimates a user's position on a guidance route to include: information on the distance traveled by the user, which is specified based on information on the movement of the user detected by a sensor; A positioning information acquisition unit that acquires positioning information including information on whether or not it is used, and a position estimation unit that estimates the position of the user on the guidance route based on the information on the distance traveled by the user included in the positioning information. When the positioning information includes information indicating that the stairs have been used, the position estimating unit detects the stairs based on the information on the distance traveled by the user included in the positioning information. An estimated moving distance during use is calculated, and the position of the user on the guidance route is estimated using the estimated moving distance.

According to the present invention, it is possible to correct the error between the actual travel distance and the positioning result by the autonomous navigation when using the stairs while moving along the guidance route, and to realize a natural display on the guidance screen.

1 is a block diagram showing the hardware configuration of mobile terminal 10 according to an embodiment of the present invention; FIG. 1 is a block diagram showing the functional configuration of a mobile terminal 10 according to an embodiment of the invention; FIG. 4 is a flow chart of processing executed in the mobile terminal 10 according to the embodiment of the present invention; 4A to 4C are diagrams showing examples of navigation screens displayed on the display unit 15 of the mobile terminal 10. FIG.

Embodiments for carrying out the present invention will now be described in detail with reference to the drawings.
Embodiment

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the scope of the invention is not limited to these.

FIG. 1 is a block diagram showing the hardware configuration of a mobile terminal (information processing device) 10 according to an embodiment of the present invention. The mobile terminal 10 is a mobile phone (including a smart phone), a tablet terminal, a PDA (Personal Digital Assistants), a dedicated navigation terminal, a personal computer, or the like. As shown in FIG. 1, the mobile terminal 10 includes a control section 11, a communication section 12, a storage section 13, an operation section 14, a display section 15, a sensor 16 and a speaker 17. FIG. The control unit 11 includes a CPU (Central Processing Unit) 11a and a memory 11b.

In the control unit 11, the CPU 11a expands the programs stored in the storage unit 13 or the like into the memory 11b and executes them, thereby controlling the operations of various components included in the mobile terminal 10 and controlling the execution of various processes. do. Details of the processing executed in the control unit 11 will be described later.

The communication unit 12 is a communication interface for communicating with an external device. For example, the communication unit 12 receives data and commands from an external device, and transmits processing results of the mobile terminal 10 to the outside.

The storage unit 13 is a non-volatile storage device, and is configured by a semiconductor memory or the like, for example. The storage unit 13 stores various programs and information necessary for execution of processing in the control unit 11 .

The operation unit 14 is a user interface for receiving instructions from the user of the mobile terminal 10 and outputting them to the control unit 11 . The operation unit 14 is composed of operation keys, a touch panel, and the like, for example.

The display unit 15 is a user interface for displaying processing results by the mobile terminal 10 . The display unit 15 is configured by a display device using a liquid crystal, an LED (Light Emitting Diode), or the like.

The sensor 16 is composed of various sensors. The sensor 16 can include, for example, a gyro sensor, an acceleration sensor, a geomagnetic sensor, an atmospheric pressure sensor, and the like. The sensor 16 can detect various actions of the user carrying the mobile terminal 10 .

The speaker 17 outputs various sounds such as voice, music, and sound effects according to processing control by the control unit 11 .

In the present embodiment, the mobile terminal 10 is configured by a single information processing device, but is not limited to this. may be realized.

FIG. 2 is a block diagram showing the functional configuration of the mobile terminal 10. As shown in FIG. The mobile terminal 10 includes a database 110, a route guidance unit 111, a signal positioning unit 112, an autonomous navigation positioning unit 113, a positioning information acquisition unit 114, a position estimation unit 115, and a display control unit 116 as functional configurations. Database 110 is implemented by storage unit 13 . Further, the functions of the route guidance unit 111, the signal positioning unit 112, the autonomous navigation positioning unit 113, the positioning information acquisition unit 114, the position estimation unit 115, and the display control unit 116 are performed by the CPU 11a in the control unit 11, the storage unit 13, etc. is implemented by expanding the program stored in the memory 11b and executing it. Details of each functional configuration provided in the mobile terminal 10 will be described below.

The database 110 stores various types of information such as information necessary for processing executed in the mobile terminal 10 and information generated by the processing.

The route guidance unit 111 acquires information on a guidance route from the departure point to the destination according to the route search conditions that have been input, and presents the guidance route via the display unit 15 to the user. Provide route guidance. In this embodiment, the guidance route includes all routes that the user can move, such as roads, squares, indoor and underground corridors, and the like.

Regarding the search for the guidance route, the route guidance unit 111 refers to map data or the like stored in the database 110 (or acquired from an external device via the communication unit 12), for example, according to route search conditions input by the user. , to acquire guidance route information by executing a route search. Alternatively, route search processing according to the input route search conditions may be performed by an external device, and the route guidance unit 111 may acquire the route search processing result. Any method such as the label determination method or the Dijkstra method can be used as the route search method. The optimum route means that the cost information from the departure point to the destination point is the minimum. The link cost information can be set according to the purpose, such as distance, required time, fee, other parameters, and an arbitrary combination of various parameters.

For route guidance, the route guidance unit 111 presents the route via the display unit 15, displays information on the user's current location specified by processing described later, and outputs voice guidance via the speaker 17. can also be done.

The signal positioning unit 112 measures the current position of the mobile terminal 10 (or the user of the mobile terminal 10) based on GPS satellite signals received by a GPS receiver (not shown), and obtains position information (for example, Latitude and longitude information) is output together with positioning time information. Further, the signal positioning unit 112 can position the current position of the mobile terminal 10 according to the signal received from the access point installed near the mobile terminal 10 . In addition, the mobile terminal 10 receives a signal from a radio signal transmitter such as RFID (Radio Frequency Identifier) or Bluetooth (registered trademark), and measures the current position of the mobile terminal 10 according to the received signal. can also The signal positioning unit 112 performs positioning processing at arbitrary timing and time intervals (for example, every 1 second). Hereinafter, in the present embodiment, such positioning processing performed according to signals received from external devices, such as GPS satellite signals, signals from access points, and RFID radio signals, is referred to as signal positioning.

Based on information on the movement of the user of the mobile terminal 10 detected by the sensor 16, the autonomous navigation positioning unit 113 obtains the moving distance, moving direction, position information (latitude and longitude information) is measured by autonomous navigation and output as positioning information together with information on the positioning time. The autonomous navigation positioning unit 113 performs positioning processing at arbitrary timing and time intervals (for example, every 1 second). Positioning by the autonomous navigation positioning unit 113 can employ any autonomous navigation technique using the sensor 16 or the like.

In order to perform positioning, the autonomous navigation positioning unit 113 calculates, for example, the number of steps taken by the user during walking from the reference position (the positioning position specified at the time of the previous positioning) based on the movement of the user detected by the sensor 16. and the moving direction are specified, and based on the specified number of steps and the moving direction, information on the relative moving distance and moving direction from the reference position is calculated. The relative moving distance is obtained, for example, by multiplying the standard step length (or the pre-measured step length of the user of the mobile terminal 10) (for example, 65 cm) when walking by the specified number of steps. Calculated by The autonomous navigation positioning unit 113 positions the current position of the mobile terminal 10 based on the calculated moving distance and moving direction information from the reference position. A more accurate current position may be specified by acquiring a reference position through positioning processing of the signal positioning unit 112 .

Also, the autonomous navigation positioning unit 113 determines whether or not an escalator, elevator, or stairs are used based on the amount of change in air pressure value over time measured by the sensor 16 (air pressure sensor). Autonomous navigation technology using an air pressure sensor can be used to determine whether to use an escalator, elevator, or stairs. For example, the autonomous navigation positioning unit 113 determines that an escalator, elevator, or stairs have been used when an increase or decrease in air pressure is detected, and furthermore, determines whether an escalator has been used depending on the speed or acceleration of the change in air pressure. , elevators, or stairs can be specified.

The autonomous navigation positioning unit 113 outputs the positioning information of the mobile terminal 10 specified as described above at arbitrary timing and time intervals (for example, every second). Positioning information includes relative movement distance and direction from the previous positioning, information on the number of steps since the previous positioning, information on the current position (latitude and longitude information), and whether ascending or descending is detected. and whether or not escalators, elevators, or stairs are used.

Positioning by the autonomous navigation positioning unit 113 is effective when the mobile terminal 10 cannot receive GPS signals or signals from access points (for example, when the user carrying the mobile terminal 10 is indoors or underground). Alternatively, when the mobile terminal 10 can receive the signal but the positioning accuracy of the signal positioning unit 112 is considered to be low (for example, when the user carrying the mobile terminal 10 is outdoors surrounded by high-rise buildings) Positioning by the autonomous navigation positioning unit 113 is also effective. Therefore, the mobile terminal 10 can switch between the signal positioning unit 112 and the self-contained navigation positioning unit 113 for positioning according to, for example, the reception status of GPS signals and signals from access points.

The positioning information acquisition unit 114 receives the positioning information output from the autonomous navigation positioning unit 113 and supplies the positioning information to the position estimation unit 115 .

The position estimation unit 115 identifies the estimated position of the mobile terminal 10 (or the estimated position of the user of the mobile terminal 10) on the guidance route. Specifically, the position estimating unit 115 identifies a position advanced by a predetermined distance in the direction of the destination along the guidance route from the starting position (previous estimated position) as the estimated position of the mobile terminal 10 . The predetermined distance here is determined based on positioning information output by the autonomous navigation positioning unit 113 . For example, the movement distance included in the positioning information may be used as the predetermined distance. Alternatively, it may be calculated by multiplying the number of steps included in the positioning information by a preset step length. Note that, when the accuracy of positioning by the signal positioning unit 112 is high (for example, when the strength of the received GPS signal is strong), the position estimation unit 115 estimates the position of the mobile terminal 10 positioned by the signal positioning unit 112 to the mobile terminal. It can also be specified as 10 estimated locations.

Further, when the positioning information output by the autonomous navigation positioning unit 113 includes information indicating that there is use of stairs, the position estimation unit 115 calculates the estimated movement distance from the previous estimated position during use of the stairs, Let it be the predetermined distance.

The estimated moving distance is calculated by subtracting a certain distance from the moving distance output by the autonomous navigation positioning unit 113 . Specifically, on the premise that the stride length of one step is shorter than usual when using stairs, a value obtained by multiplying the subtracted distance per step (for example, 30 cm) by the number of steps is subtracted. For example, when the positioning information of the autonomous navigation positioning unit 113 is output every second, a value obtained by multiplying the subtracted distance per step by the number of steps per second (for example, one step) is subtracted. That is, the estimated travel distance can be calculated by subtracting a preset distance (30 cm) from the travel distance measured by the autonomous navigation positioning unit 113 .

Alternatively, the estimated movement distance may be obtained by multiplying the normal stride length by a preset ratio (for example, 0.8 times) and shortening the stride length by the number of steps per second. That is, the estimated travel distance may be calculated by multiplying the travel distance measured by the autonomous navigation positioning unit 113 by a preset ratio (0.8 times).

As the starting position on the guidance route, the position on the guidance route where the user of the mobile terminal 10 starts moving is set. Further, it is desirable that the starting point position information is set to information with the highest possible reliability as information on the position where the user actually started movement. For example, when the accuracy of positioning by the signal positioning unit 112 is high (for example, when the intensity of the received GPS signal is strong), the position of the mobile terminal 10 positioned by the signal positioning unit 112 can be set as the starting point position. .

The display control unit 116 controls display of various information and images on the display unit 15 . For example, the display control unit 116 controls the display unit 15 to display the user's estimated position on the guidance route specified by the position estimation unit 115 .

Next, processing executed in the mobile terminal 10 will be described using the flowchart of FIG. Each processing step included in the processing flow described below can be arbitrarily changed in order or executed in parallel as long as there is no contradiction in the processing content. You can add steps. Further, a step described as one step for convenience can be divided into a plurality of steps and executed, while a step described as a plurality of steps for convenience can be grasped as one step.

First, in step S11, the route guidance unit 111 refers to the map data and the like stored in the database 110 according to the route search conditions input by the user of the mobile terminal 10, and executes the route search. Acquire guidance route information to the destination.

Next, in step S12, the position estimation unit 115 sets the starting position of the mobile terminal 10 on the guidance route searched in step S11.

Next, in step S<b>13 , the autonomous navigation positioning unit 113 performs positioning of the movement distance and the movement direction of the mobile terminal 10 based on information on the movement of the user of the mobile terminal 10 detected by the sensor 16 .

Furthermore, in step S14, the autonomous navigation positioning unit 113 determines whether or not an escalator, elevator, or stairs are used based on the amount of change in air pressure value over time measured by the air pressure sensor.

In step S15, the autonomous navigation positioning unit 113 performs positioning including information on the distance and direction of movement of the mobile terminal 10, information on the current position (information on latitude and longitude), and information on whether or not an escalator, elevator, or stairs are used. The information is output to positioning information acquisition section 114 .

Next, in step S16, the position estimation unit 115 acquires the positioning information output by the autonomous navigation positioning unit 113 from the positioning information acquisition unit 114, and determines whether use of stairs has been detected.

If it is determined in step S16 that use of the stairs has been detected (YES), in step S17 the position estimation unit 115 calculates an estimated moving distance during use of the stairs. If it is determined in step S16 that the use of the stairs has not been detected (NO), the process proceeds to step S19.

Next, in step S18, the position estimating unit 115 estimates the position of the mobile terminal 10 that is advanced by the estimated movement distance calculated in step S17 along the guidance route from the previous estimated position (the starting point position in the case of the first time). Identify as location.

In step S19, the position estimating unit 115 advances the mobile terminal 10 by the movement distance output by the autonomous navigation positioning unit 113 along the guidance route from the previous estimated position (the starting position in the case of the first time). The position is specified as the estimated position of the mobile terminal 10 .

Next, in step S20, the display control unit 116 controls the display unit 15 to display the estimated position of the mobile terminal 10 specified in step S18 or S19.

Next, in step S21, the route guidance unit 111 determines whether or not the estimated position of the mobile terminal 10 has reached the destination of the guidance route. do. On the other hand, if the destination has been reached (YES), the process ends.

4A to 4C are diagrams showing examples of navigation screens displayed on the display unit 15 of the mobile terminal 10. FIG. The screens shown in FIGS. 4A to 4C show estimated positions X1, X2, and X3 of the user on the guide route R at times t1, t2, and t3, respectively. Note that the times t1, t2, and t3 correspond to the timings at which the positioning information is output from the autonomous navigation positioning unit 113. FIG. Since the user walked along the guidance route R from time t1 to t2, the positioning information of the autonomous navigation positioning unit 113 at time t2 includes a predetermined movement distance L12. Therefore, as shown in FIG. 4B, position estimating section 115 identifies a position advanced by distance L12 from position X1 as estimated position X2 at time t2. Between times t2 and t3, the user climbed the stairs on the guidance route R, so the positioning information from the autonomous navigation positioning unit 113 output at time t3 includes information indicating that the stairs are available. be Accordingly, the position estimating unit 115 calculates an estimated movement distance L23' along the stairs, and as shown in FIG. 4C, specifies a position advanced by a distance L23' from the position X2 as an estimated position X3 at time t3.

As described above, according to the present embodiment, when the positioning information by the autonomous navigation positioning unit 113 includes the information that the stairs are used, the position estimation unit 115 calculates the estimated movement distance during the use of the stairs. The user's estimated position is the position calculated and advanced by the estimated movement distance on the guidance route. As a result, it is possible to correct the error between the positioning result obtained by the autonomous navigation and the actual distance traveled when using stairs. In addition, when there is use of stairs, the estimated movement distance is calculated and the user's estimated position is identified every time the positioning result by the autonomous navigation is output, so the error of the movement distance can be calculated almost in real time. Correction can be performed, and a natural display corresponding to actual movement can be realized on the guidance screen of the mobile terminal 10 .

Further, when calculating the estimated moving distance while using the stairs, the position estimating unit 115 subtracts a preset distance from the moving distance included in the positioning information by the autonomous navigation positioning unit 113, or Since the value multiplied by the ratio is set as the estimated moving distance, it is possible to accurately correct the error between the actual moving distance and the positioning result by the autonomous navigation.

The present invention is not limited to the embodiments described above, and can be implemented in various other forms without departing from the scope of the present invention. The above embodiments are merely examples in all respects and should not be construed as limiting.

In addition, the program of the present invention can be installed or loaded into a computer by downloading through various recording media such as optical discs such as CD-ROMs, magnetic discs, and semiconductor memories, or through communication networks. .

10 mobile terminal, 11 control unit, 12 communication unit, 13 storage unit, 14 operation unit, 15 display unit, 16 sensor, 17 speaker, 110 database, 111 route guidance unit, 112 signal positioning unit, 113 autonomous navigation positioning unit, 114 positioning information acquisition unit 115 position estimation unit 116 display control unit

Claims (3)

An information processing device for estimating a user's position on a guidance route,
a positioning information acquisition unit that acquires positioning information including information on the distance traveled by the user and information on whether or not to use stairs, which is specified based on information on the movement of the user detected by a sensor;
a position estimating unit that estimates the position of the user on the guidance route based on information on the user's movement distance included in the positioning information;
When the positioning information includes information indicating that stairs were used, the position estimation unit calculates a value obtained by subtracting a preset distance from the moving distance of the user included in the positioning information. , an information processing apparatus that calculates an estimated moving distance while using the stairs, and estimates the position of the user on the guide route using the estimated moving distance. An information processing method for estimating a user's position on a guidance route,
a step of obtaining positioning information including information on the distance traveled by the user and information on whether or not stairs are used, which are specified based on information on the movement of the user detected by a sensor;
estimating the position of the user on the guidance route based on information on the distance traveled by the user included in the positioning information;
In the step of estimating the position of the user, if the positioning information includes information indicating that the stairs were used, a preset distance is calculated from the moving distance of the user included in the positioning information. The information processing method , wherein the subtracted value is calculated as the estimated movement distance while using the stairs, and the position of the user on the guidance route is estimated using the estimated movement distance. A computer that estimates the position of the user on the guidance route,
a positioning information acquisition unit that acquires positioning information including information on the distance traveled by the user and information on whether or not to use stairs, which is specified based on information on the movement of the user detected by a sensor;
functioning as a position estimating unit that estimates the position of the user on the guidance route based on information on the user's movement distance included in the positioning information;
When the positioning information includes information indicating that stairs were used, the position estimation unit calculates a value obtained by subtracting a preset distance from the moving distance of the user included in the positioning information. , a program for calculating an estimated moving distance while using the stairs, and estimating the position of the user on the guide route using the estimated moving distance.

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