JP2010038712A - Position detection apparatus and position detection program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a position detection apparatus power-saving by automatically setting on or off a GPS receiving function. <P>SOLUTION: A GPS signal receiving processing section 107 judges whether or not a GPS signal is received (step SA2). When the GPS signal receiving processing section 107 has lost a GPS satellite signal due to migration to indoors, a power source supply stop is indicated to the GPS signal receiving processing section 107 (step SA6). In a case of migration to indoors, an autonomous navigation sensing processing is carried out for detecting a relative migration position at indoors based on output of sensors (step SA8), and it is judged whether or not the position obtained by the autonomous navigation sensing processing has migrated to outdoors from indoors (step SA9). Under a state of migrating to outdoors and capable of receiving GPS satellite signals, a power source supply start is indicated to the signal receiving processing section 107 (step SA10). Thereby, the GPS receiving function is automatically set on or off and power saving can be achieved. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an apparatus for detecting a current position of a user who moves outdoors or indoors, and more particularly, to a position detection apparatus and a position detection program for saving power in order to prevent battery consumption.

  In an in-vehicle type car navigation system that is installed in a vehicle and used in a location where radio waves for positioning from GPS satellites (hereinafter referred to as GPS satellite signals) cannot be received, such as tunnels, vehicle speed pulses and angular velocity sensors ( Autonomous navigation is realized with a gyro sensor. On the other hand, in a portable navigation system (position detection device), the GPS satellite signal is received and measured outdoors as in the case of the car navigation system. The relative movement position is detected using an orientation sensor or the like.

An apparatus that detects a relative movement position using a sensing device (such as an acceleration sensor or an orientation sensor) is disclosed in Patent Document 1, for example. The apparatus disclosed in Patent Document 1 detects a user's movement by an internal sensor composed of a three-dimensional acceleration sensor, a gyro, and the like, and integrates the detected acceleration and angular velocity to determine the direction and distance that the user moves. The position is calculated (position estimation).

JP 2005-257644 A

  By the way, in the above-described portable position detection device, it is required to save power to prevent the battery serving as a power source from being consumed. If the user can set the GPS reception function with relatively high power consumption on / off as needed, power consumption can be saved by eliminating wasteful power consumption. Despite being indoors where signals cannot be received, the user may forget to turn off the GPS reception function and invite unnecessary power consumption. That is, there is a problem that the GPS reception function cannot be automatically set on and off to save power.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a position detection device and a position detection program that can automatically set a GPS reception function on and off to save power.

  In order to achieve the above object, according to the first aspect of the present invention, first position detection means for detecting a current position outdoors by receiving a GPS satellite signal, and a current position indoors are detected based on the sensor output. A second position detecting means for receiving, wherein the first position detecting means receives the GPS satellite signal, and the reception determining means receives the GPS satellite signal. When it is determined that the current position detected by the second position detection means and the power supply stop means for stopping the power supply to the first position detection means has moved from indoor to outdoor A movement determining means for determining whether or not the current position has been moved from indoor to outdoor by the movement determining means when the power supply stopping means has stopped supplying power to the first position detecting means. If it is a constant, characterized by comprising a power supply start means for starting the power supply to the first position detection means.

  In the invention according to claim 2, the first position detecting means for detecting the current position outdoors by receiving GPS signals, and the second position detecting means for detecting the current position indoors based on the sensor output; And a reception determination process for determining whether or not the first position detection means has received a GPS signal, and a GPS signal has not been received by the reception determination process. The power supply stop process for stopping the power supply to the first position detecting means, and whether the current position detected by the second position detecting means has moved from indoor to outdoor When the movement determination process and the power supply stop process stop the power supply to the first position detecting means, the movement determination process determines that the current position has moved from indoor to outdoor. Case , Characterized by comprising a power supply start processing for starting the power supply to the first position detection means.

  In the present invention, the GPS reception function can be automatically turned on / off to save power.

Embodiments of the present invention will be described below with reference to the drawings.
A. Configuration FIG. 1 is a block diagram showing a configuration of a position detection apparatus according to an embodiment of the present invention. The position detection device shown in this figure includes components 100 to 112 described later in a casing that can be carried by a user, and detects the current position of the user who carries it outdoors or indoors and displays it on the screen. Yes, the GPS reception function is automatically turned off (power off) when the user carrying the mobile phone is indoors, while the GPS reception function is automatically turned on (moving from indoors to the outdoors) It is characterized by saving power by turning on the power).

The configuration of such a position detection device will be described below. In FIG. 1, the CPU 100 controls each part of the apparatus according to an operation event supplied from the operation unit 103. A characteristic processing operation of the CPU 100 according to the gist of the present invention will be described later. The ROM 101 stores various program data executed by the CPU 100.

The RAM 102 includes a work area and a data area. The work area of the RAM 102 temporarily stores output data and position information of various sensors, which will be described later, in addition to various register / flag data used for the calculation of the CPU 100. The data area of the RAM 102 stores the floor layout of the building whose position is detected, that is, layout data representing the planar structure (wall position, staircase position, elevator position, escalator position, etc.) for each floor of the building.

  Here, the contents of the layout data stored in the data area of the RAM 102 will be described with reference to FIGS. FIG. 2 is a diagram showing an example of layout data. When the plan structure of the first floor part of the building where the position is detected is shown in the layout diagram of FIG. 2A, the layout data corresponding to this is shown in FIG. In this way, it is composed of layout data (X1 (0), Y1 (0)) to (X1 (n), Y1 (n)) representing the inner wall contour and the positions of the stairs, elevator and escalator.

  Such layout data is provided for each floor of the building where position detection is performed. For example, as in the example illustrated in FIG. 3, in the case of a four-story building, 1F layout data (X1 (0), Y1 (0)) to (X1 (n) of the height Z1 (elevation h1) of the first floor ), Y1 (n)), 2F layout data (X2 (0), Y2 (0)) to (X2 (n), Y2 (n)) of the second floor height Z2 (elevation h2), the height of the third floor 3F layout data (X3 (0), Y3 (0)) to (X3 (n), Y3 (n)) of Z3 (elevation h3) and 4F layout data (X4 (elevation h4) of the fourth floor height Z4 (elevation h4) 0), Y4 (0)) to (X4 (n), Y4 (n)) is stored in the data area of the RAM 102.

  Next, the configuration of the embodiment will be described with reference to FIG. 1 again. In FIG. 1, the operation unit 103 is provided with various operation buttons and operation switches, and generates an operation event corresponding to the type of button or switch to be operated and supplies the operation event to the CPU 100. Specifically, in addition to a power switch for turning on and off the apparatus power supply, for example, a start point position input switch for inputting a start point position serving as a base point for indoor position detection such as a building entrance is disposed in the operation unit 103.

The display unit 104 displays the current position of the user according to the display control signal supplied from the CPU 100. Specifically, on the map indicated by the mesh map data including the position information obtained by GPS positioning, the current position specified by the position information is displayed on the screen, or the layout data of the floor where position detection is performed. The current position of the detected user is displayed on the screen as a movement locus superimposed on the layout diagram while the layout diagram is displayed on the screen based on the above. The atmospheric pressure sensor 105 detects atmospheric pressure by a pressure sensor using a piezoresistance effect and outputs atmospheric pressure data.

The map database 106 stores and manages map data expressed in a vector format by dividing it into rectangular areas called meshes. The GPS signal reception processing unit 107 receives a GPS satellite signal according to an instruction from the CPU 100 and calculates position information including at least the latitude and longitude of the current location. This position information is stored in the work area of the RAM 102. The GPS signal reception processing unit 107 includes a switching element that turns on and off its own drive power supply. When a power supply stop instruction is received from the CPU 100, the GPS signal reception processing unit 107 turns off its own drive power supply. If it receives, it turns on its own drive power.

The triaxial geomagnetic sensor 108 outputs triaxial geomagnetic data representing the triaxial (X, Y, Z) components of geomagnetism detected using, for example, an MI element whose impedance changes in accordance with a change in the external magnetic field. The triaxial acceleration sensor 109 detects triaxial acceleration components by a piezoresistive type or capacitance type detection mechanism and outputs acceleration data for each triaxial component. Note that the triaxial components detected by the triaxial acceleration sensor 109 correspond to the triaxial (X, Y, Z) components of the triaxial geomagnetic sensor 108, respectively.

Under the control of the CPU 100, the movement amount calculation unit 110 calculates the movement direction from the start point position or the previously detected position based on the triaxial geomagnetic data output from the triaxial geomagnetic sensor 108, and the triaxial acceleration. The three-axis acceleration data output from the sensor 109 is integrated to calculate the movement distance from the start point position or the previously detected position. The moving direction and moving distance calculated by the moving amount calculation unit 110 are supplied to the CPU 100.

  Under the control of the CPU 100, the atmospheric pressure change calculation unit 111 determines the lifting / lowering operation of the user who carries the apparatus. That is, when the atmospheric pressure data output from the atmospheric pressure sensor 105 slightly decreases, it is determined that the user has risen to the upper floor, while when the atmospheric pressure data slightly increases, the user has descended to the lower floor. Determine. Operation determination data representing such determination results is supplied to the CPU 100. The atmospheric pressure change calculation unit 111 generates altitude data obtained by converting the value of the atmospheric pressure data output from the atmospheric pressure sensor 105 into altitude.

  The position information processing unit 112 calculates the position of the user who moves inside the building in cooperation with the CPU 100, and superimposes the calculated user position on the layout diagram corresponding to the currently referenced layout data on the display unit 104. The position is displayed, and when the calculated user position intersects the structure shown in the layout diagram, the intersection position is corrected to the current position. Details of the processing of the position information processing unit 112 that operates in cooperation with the CPU 100 will be described later.

B. Operation Next, an operation of a positioning process performed by the position detection device having the above-described configuration will be described with reference to FIGS. FIG. 4 is a flowchart showing the operation of the positioning process, and FIGS. 5 to 6 are flowcharts showing the operation of the autonomous navigation sensing process called from the positioning process. 7-10 is a figure for demonstrating operation | movement of the autonomous navigation sensing process.

(1) Operation of positioning processing When the position detection device is powered on, the process proceeds to step SA1 of the positioning processing shown in FIG. 4, and the GPS signal reception processing unit 107 receives a GPS satellite signal according to an instruction from the CPU 100. Execute the process. Subsequently, in step SA2, the CPU 100 determines whether or not the GPS signal reception processing unit 107 has received a GPS satellite signal. If the GPS signal reception processing unit 107 is receiving a GPS satellite signal, that is, if the user carrying this apparatus is outdoors, the determination result in Step SA2 is “YES”, and the process proceeds to Step SA3.

  In step SA3, the GPS signal reception processing unit 107 executes a positioning calculation process for generating position information including at least the latitude and longitude of the current location from the GPS satellite signal. The position information (current position) obtained by this positioning calculation process is stored in the work area of the RAM 102. In step SA4, the CPU 100 executes map data search processing for searching the map database 106 for mesh map data including position information stored in the work area of the RAM 102. In the subsequent step SA5, display processing for displaying the current position specified by the position information on the map indicated by the map data searched in step SA4 is executed. Thereafter, the process returns to the above-described step SA1, and thereafter, the above-described steps SA1 to SA5 are repeated until the GPS signal reception processing unit 107 has lost the GPS satellite signal.

  For example, it is assumed that a user carrying this apparatus moves indoors from the outdoors, and the GPS signal reception processing unit 107 has lost the GPS satellite signal. If it does so, the judgment result of above-mentioned step SA2 will be "NO", and it progresses to step SA6, and CPU100 instruct | indicates a power supply stop to the GPS signal reception process part 107. FIG. The GPS signal reception processing unit 107 turns off its own drive power in response to a power supply stop instruction from the CPU 100. As a result, when the user carrying the device moves indoors from the outdoors and loses the GPS satellite signal, the driving power of the GPS signal reception processing unit 107 is automatically turned off to save power. Yes.

  Subsequently, in step SA7, when the user operates the start point position input switch and inputs the start point position in response to the movement from the outdoor to the indoor, the CPU 100 stores the input start point position in the work area of the RAM 102. Store. The start point position refers to a position detection base point such as a building entrance as in the example illustrated in FIG. In this embodiment, the start point position is input by user operation. However, the present invention is not limited to this, and the position information obtained by GPS positioning is automatically acquired immediately before entering the indoors, that is, immediately before the GPS satellite signal is lost. Alternatively, the start point position may be input.

Now, when the starting point position is set in this way, autonomous navigation sensing processing is executed via step SA8. In this autonomous navigation sensing process, as will be described later, relative indoor movement positions are detected based on the sensor outputs of the atmospheric pressure sensor 105, the triaxial geomagnetic sensor 108, and the triaxial acceleration sensor 109. In step SA9, it is determined whether or not the position obtained by the autonomous navigation sensing process has moved from indoor to outdoor. If the obtained position is indoors, the determination result is “NO”, and the process returns to step SA8 to continue the autonomous navigation sensing process.

  On the other hand, when the obtained position is outdoors, that is, when moving from indoors to outdoors, the determination result in Step SA9 is “YES”, and the process proceeds to Step SA10. In step SA10, the CPU 100 instructs the GPS signal reception processing unit 107 to start power supply. The GPS signal reception processing unit 107 turns on its own drive power supply in response to a power supply start instruction from the CPU 100. As a result, when the user carrying the apparatus moves from indoors to outdoors and can receive GPS satellite signals, the driving power supply of the GPS signal reception processing unit 107 is automatically set to ON. Thus, when the GPS signal reception processing unit 107 becomes capable of receiving operation, the process returns to the above-described step SA1, and the GPS signal reception process for receiving the GPS satellite signal is executed again.

(1) Operation of Autonomous Navigation Sensing Process Next, the operation of the autonomous navigation sensing process will be described with reference to FIGS. When this processing is executed via the above-described positioning processing step SA8 (see FIG. 4), the process proceeds to step SB1 shown in FIG. 5 and the three axes (X, Y, Z) output from the three-axis geomagnetic sensor 108. ) The CPU 100 captures a plurality of component geomagnetic data for a certain period of time and executes a triaxial geomagnetic sensor measurement process in which it is stored in the work area of the RAM.

Subsequently, in step SB2, the CPU 100 instructs the movement amount calculation unit 110 to execute an absolute direction calculation process. Then, the movement amount calculation unit 110 moves the apparatus (position detection apparatus) that carries the apparatus (position detection apparatus) based on the geomagnetic data of the three-axis (X, Y, Z) components stored in the work area of the RAM 102 in step SB1. An absolute direction calculation process for calculating the moving direction is executed. Then, the CPU 100 stores the movement direction of the user calculated by the movement amount calculation unit 110 in the work area of the RAM 102.

  Next, in step SB3, the triaxial acceleration sensor measurement process in which the CPU 100 captures a plurality of acceleration data of the triaxial (X, Y, Z) components output from the triaxial acceleration sensor 109 and stores them in the work area of the RAM 102 for a certain period. In the subsequent step SB4, the atmospheric pressure sensor measurement process is executed in which the CPU 100 captures a plurality of atmospheric pressure data output from the atmospheric pressure sensor 105 for a predetermined period and stores them in the work area of the RAM 102.

Then, when the process proceeds to step SB5, a position information calculation process including the following processing contents (a) to (d) is executed.
(A) The CPU 100 instructs the movement amount calculation unit 110 to calculate the movement distance. Then, the movement amount calculation unit 110 determines the user's movement distance (from the start position or the previously detected position based on the acceleration data of the three-axis (X, Y, Z) components stored in the work area of the RAM 102 in step SB3. Is calculated). Then, the CPU 100 stores the movement distance of the user calculated by the movement amount calculation unit 110 in the work area of the RAM 102.

(B) The CPU 100 instructs the atmospheric pressure change calculation unit 111 to start calculation. Then, the atmospheric pressure change calculation unit 111 generates altitude data obtained by converting the atmospheric pressure data stored in the work area of the RAM 102 in step SB4 into altitude, and supplies the altitude data to the CPU 100. In addition, the atmospheric pressure change calculation unit 111 generates operation determination data for determining the user's lifting / lowering operation from the atmospheric pressure data read from the work area of the RAM 102 and supplies it to the CPU 100. That is, if the barometric pressure data that has been captured for a certain period of time has changed slightly, movement determination data indicating that the user has risen to the upper floor is generated, while if the atmospheric pressure data has changed slightly, the user has moved to the lower floor. Operation determination data indicating that the vehicle is descending is generated.

(C) The CPU 100 selects the layout data of the floor corresponding to the altitude data supplied from the atmospheric pressure change calculation unit 111 from the three-dimensional layout data (see FIG. 3) stored in the data area of the RAM 102. The position information processing unit 112 is instructed to refer to the selected layout data. For example, it is assumed that the height corresponding to the altitude data supplied from the atmospheric pressure change calculation unit 111 is “h1”. Then, the CPU 100 selects 1F layout data from the 3D layout data illustrated in FIG. 3 and instructs the position information processing unit 112 to refer to the 1F layout data.

(D) The CPU 100 instructs the position information processing unit 112 to execute position information calculation processing. Then, the position information processing unit 112, based on the “start position (or previously detected position)” stored in the work area of the RAM 102, the “movement direction” and the “movement distance” of the user, layout data currently being referenced. The current position of the user on the layout diagram indicated by is calculated.

  When the current position of the user on the layout diagram is obtained in this way, the process proceeds to step SB6, and the CPU 100 determines whether or not the user's movement mode is a flat ground walking. Whether or not it is walking on a flat ground is determined based on the acceleration data of the three-axis (X, Y, Z) components taken in for a certain period in step SB3. Hereinafter, the description of the operation will be made separately for the case of walking on a flat ground and the case of walking on a flat ground.

<When walking on flat ground>
If the movement mode of the user is walking on a flat ground, the determination result in step SB6 is “YES”, and the flow proceeds to step SB7. In step SB7, the user's current position calculated by the position information processing unit 112 in step SB5 is overlaid on the layout diagram indicated by the layout data currently being referenced. Subsequently, in step SB8, the CPU 100 determines whether or not position correction is necessary.

That is, the CPU 100 determines whether or not position correction is necessary based on whether or not the current position of the user obtained in step SB5 intersects the structure in the layout diagram indicated by the currently referenced layout data. If the current position of the user does not intersect the structure in the layout diagram, it is determined that there is no need for position correction, the determination result in step SB8 is “NO”, the process proceeds to step SB9, and the overlay is performed in step SB7 described above. The current position of the user and the layout diagram are displayed on the screen of the display unit 104, and the process is completed.

In step SB9, the CPU 100 displays the user's current position and layout diagram superimposed by the position information processing unit 112 on the display unit 104. At this time, the CPU 100 is an example illustrated in FIG. As described above, the current position of the user, which is measured every moment from the start point position, is displayed as the movement trajectory.

  On the other hand, when the current position of the user crosses the structure in the layout diagram, that is, as shown in FIG. 7A, the actual movement route is straight, but detected by the measurement process. In a situation where a cumulative error occurs in the user's position and intersects the wall in the layout diagram, position correction is necessary, so the determination result in step SB8 is “YES”, and the flow proceeds to step SB10.

In step SB10, the position information processing unit 112 corrects the intersection position to the current position of the user. That is, in the example of FIG. 7A, as shown in FIG. 7B, the layout data (X1 (a), Y1 (a)) and the layout data (X1 (b), Y1 (b) )) Is the user's current position. By doing so, the current position of the new user whose accumulated error is reset is updated. Then, the process proceeds to step SB9, where the updated current position of the user is displayed on the layout diagram, and the process ends.

<In cases other than walking on flat ground>
If the user's movement mode is other than flat ground walking, the determination result of step SB6 described above is “NO”, and the process proceeds to step SB11 illustrated in FIG. In step SB11, based on the acceleration data of the three-axis (X, Y, Z) components stored in the work area of the RAM 102 in step SB3, any of the movement modes of “elevator”, “escalator”, and “stair walking” is used. The CPU 100 determines whether the user is moving.

  Specifically, a change tendency of the acceleration data of the three-axis (X, Y, Z) components taken in for a certain period in step SB3 is extracted, and “elevator”, “escalator”, and the like are extracted according to the extracted change tendency. Specify whether it is “walking stairs”. In the following, the operation will be described separately for each case where the specified movement mode is “elevator”, “escalator”, and “stair walking”.

<When the movement mode is “Elevator”>
When the movement mode is specified as “elevator”, the process proceeds to step SB12, and the CPU 100 determines whether or not the movement by the elevator is stopped based on the operation determination data generated by the atmospheric pressure change calculation unit 111 in step SB5. . If the operation determination data represents an ascending operation or a descending operation, that is, if the elevator is moving, the determination result is “NO”, and the process returns to step SB7 (see FIG. 5).

  On the other hand, if the operation determination data does not indicate that the elevator is moving up and down and it is determined that the elevator is stopped, the determination result in step SB12 is “YES”, the process proceeds to step SB13, and the elevator exit position reset process is executed. To do. In this elevator exit position reset process, the CPU 100 instructs the position information processing unit 112 to reset the current position of the user to the elevator exit position.

For example, as shown in FIG. 8A, when the CPU 100 determines that the elevator is stopped when the current position of the user calculated by the position information processing unit 112 exists in the elevator. As illustrated in (b), the current position of the user is corrected to the elevator exit position. As a result, the current position of the new user whose accumulated error has been reset is updated.

  In the elevator exit position reset process in step SB13, the CPU 100 corresponds to the altitude data corresponding to the altitude data supplied from the atmospheric pressure change calculation unit 111 in the three-dimensional layout data (see FIG. 3) stored in the data area of the RAM 102. After selecting the floor layout data and instructing the position information processing unit 112 to refer to the selected layout data, the process proceeds to step SB7 (see FIG. 5) described above. In step SB7 after the elevator exit position reset process, the layout diagram of the user's current position (elevator exit position) updated in step SB13 is shown by the layout data of the floor where the user got off using the elevator. To overlay.

<When the movement mode is "escalator">
When the movement mode is specified as “escalator”, the process proceeds to step SB14, and the CPU 100 determines whether or not movement by the escalator is stopped based on the operation determination data generated by the atmospheric pressure change calculation unit 111 in step SB5. . If the operation determination data represents an ascending operation or a descending operation, that is, if the escalator is moving, the determination result is “NO”, and the process returns to step SB7 (see FIG. 5).

  On the other hand, if the operation determination data does not indicate that the operation is moving up and down and it is determined that the escalator is stopped, the determination result in step SB14 is “YES”, the process proceeds to step SB15, and the escalator exit position reset process is executed. To do. In this escalator exit position reset process, the CPU 100 instructs the position information processing unit 112 to reset the current position of the user to the escalator exit position.

For example, as in the example illustrated in FIG. 9A, when the CPU 100 determines that the escalator is stopped when the current position of the user calculated by the position information processing unit 110 exists in the vicinity of the escalator exit, As shown in FIG. 5B, the current position of the user is corrected to the escalator exit position. As a result, the current position of the new user whose accumulated error has been reset is updated.

  In the escalator exit position reset process in step SB15, the CPU 100 corresponds to the altitude data corresponding to the altitude data supplied from the atmospheric pressure change calculation unit 111 in the three-dimensional layout data (see FIG. 3) stored in the data area of the RAM 102. After selecting the floor layout data and instructing the position information processing unit 112 to refer to the selected layout data, the process proceeds to step SB7 (see FIG. 5) described above. In step SB7 after the escalator exit position reset process, the layout diagram of the user's current position (escalator exit position) updated in step SB15 is shown by the layout data of the floor where the user got off using the escalator. To overlay.

<When the movement mode is "Stair walking">
When the movement mode is specified as “stair walking”, the process proceeds to step SB16, and the CPU 100 determines whether or not it is a staircase landing based on the operation determination data generated by the atmospheric pressure change calculation unit 111 in step SB5. If the motion determination data represents an ascending or descending motion, that is, if the staircase is ascending or descending, the determination result is “NO”, and the process proceeds to step SB7 (see FIG. 5) described above. To return.

  On the other hand, if the movement determination data does not indicate that the movement is an up-and-down movement, that is, if it is determined to walk at the stair landing, the determination result in step SB16 is “YES”, and the process proceeds to step SB17, where the stair exit position Execute reset processing. In this stairway exit position reset process, the CPU 100 instructs the position information processing unit 112 to reset the current position of the user to the stairway exit position. For example, as shown in FIG. 10A, when the current position of the user is determined to be a stair landing, as shown in FIG. 10B, the current position of the user is corrected to the stair exit position. To do. As a result, the current position of the new user whose accumulated error has been reset is updated.

  In the stairs exit position reset process in step SB17, the height corresponding to the altitude data supplied from the atmospheric pressure change calculation unit 111 in the three-dimensional layout data (see FIG. 3) stored in the data area of the RAM 102 by the CPU 100. After selecting the floor layout data and instructing the position information processing unit 112 to refer to the selected layout data, the process proceeds to the above-described step SB7 (see FIG. 5). In step SB7 after the stairs exit position reset process, the current position (step exit position) of the user updated in step SB17 is overlaid on the layout diagram indicated by the layout data of the floor on which the user got off.

(2) End of Autonomous Navigation Sensing Process Next, a case where the current position of the user goes out of the structure in the layout diagram will be described. When walking indoors toward the entrance as in the example shown in FIG. 11A, the current position of the user is calculated in the same manner as in the case of walking on the flat ground described above, and if necessary, Position correction is performed with the layout data shown in FIG.

Then, when going outside from the entrance, the determination result of step SA9 in FIG. In step SA10, the CPU 100 instructs the GPS signal reception processing unit 107 to start power supply. The GPS signal reception processing unit 107 turns on its own drive power supply in response to a power supply start instruction from the CPU 100. As a result, a GPS satellite signal can be received, and the GPS signal reception processing unit 107 executes a positioning calculation process for generating position information including at least the latitude and longitude of the current location from the GPS satellite signal.
Based on the position information obtained as a result, the current position of the user is corrected. Thereafter, the current position of the user is displayed based on the position information acquired from the GPS signal reception processing unit 107.

  As described above, in this embodiment, the CPU 100 determines whether or not the GPS signal reception processing unit 107 has received a GPS signal. For example, when a user carrying this device moves indoors from the outdoors, the GPS signal reception is performed. When the processing unit 107 has lost the GPS satellite signal, the CPU 100 instructs the GPS signal reception processing unit 107 to stop power supply. As a result, the GPS signal reception processing unit 107 automatically turns off the driving power supply of the GPS signal reception processing unit 107 as a result of turning off its own driving power supply in response to a power supply stop instruction from the CPU 100, thereby saving power. Plan.

  When the user carrying this apparatus inputs a start point position in response to moving from the outside to the indoor, the barometric pressure sensor 105, the three-axis geomagnetic sensor 108, and the three-axis acceleration are set based on the input start point position. Autonomous navigation sensing processing for detecting a relative movement position indoors based on each sensor output of the sensor 109 is executed. When the position obtained by the autonomous navigation sensing processing is outdoors, that is, when the user carrying the apparatus moves from indoors to the outdoors and can receive GPS satellite signals, the CPU 100 receives the GPS signal reception processing unit 107. Is instructed to start power supply, and the driving power of the GPS signal reception processing unit 107 is automatically turned on. As a result, it is possible to save power by automatically setting the GPS reception function on / off.

In the present embodiment, the autonomous navigation sensing process using the layout data in the vector data format illustrated in FIG. 2B has been described. However, the present invention is not limited to this, and the autonomous navigation sensing process using the layout data in the raster data format. It does not matter.

It is a block diagram which shows the structure of one Embodiment by this invention. 4 is a diagram for explaining the contents of layout data stored in a data area of a RAM 102. FIG. 4 is a diagram for explaining the contents of layout data stored in a data area of a RAM 102. FIG. It is a flowchart which shows the operation | movement of a positioning process. It is a flowchart which shows the operation | movement of an autonomous navigation sensing process. It is a figure for demonstrating the operation | movement of an autonomous navigation sensing process. It is a figure for demonstrating the operation | movement of an autonomous navigation sensing process. It is a figure for demonstrating the operation | movement of an autonomous navigation sensing process. It is a figure for demonstrating the operation | movement of an autonomous navigation sensing process. It is a figure for demonstrating the operation | movement of an autonomous navigation sensing process. It is a figure for demonstrating completion | finish of an autonomous navigation sensing process.

Explanation of symbols

100 CPU
101 ROM
102 RAM
DESCRIPTION OF SYMBOLS 103 Operation part 104 Display part 105 Atmospheric pressure sensor 106 Map database 107 GPS signal reception process part 108 3-axis geomagnetic sensor 109 3-axis acceleration sensor 110 Movement amount calculation part 111 Atmospheric pressure change calculation part 112 Position information processing part

Claims (2)

In a position detection apparatus comprising: first position detection means for receiving a GPS satellite signal to detect a current position outdoors; and second position detection means for detecting a current position indoors based on a sensor output;
Reception determination means for determining whether or not the first position detection means has received a GPS satellite signal;
A power supply stop means for stopping power supply to the first position detection means when it is determined by the reception determination means that a GPS satellite signal is not received;
Movement determination means for determining whether or not the current position detected by the second position detection means has moved from indoors to outdoors;
When the power supply stop unit stops the power supply to the first position detection unit, the first position is determined when the movement determination unit determines that the current position has moved from indoor to outdoor. A position detection apparatus comprising: power supply start means for starting power supply to the detection means. It is executed by a position detection device comprising a first position detection means for receiving a GPS signal and detecting the current position outdoors, and a second position detection means for detecting the current position indoors based on the sensor output. A program,
A reception determination process for determining whether or not the first position detection means has received a GPS signal;
A power supply stop process for stopping power supply to the first position detecting means when it is determined that the GPS signal is not received by the reception determination process;
A movement determination process for determining whether or not the current position detected by the second position detection means has moved from indoor to outdoor;
When the power supply stop process stops the power supply to the first position detection means, and the movement determination process determines that the current position has moved from indoor to outdoor, the first position And a power supply start process for starting power supply to the detection means.

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