JP5093494B2 - Navigation device and navigation program - Google Patents

Description

  The present invention relates to a portable navigation device and a navigation program that can store and display the position of a parked vehicle without user operation.

  In recent years, portable navigation devices and navigation devices that can be carried by users have been put into practical use. This device can be used as a car navigation device mounted on a vehicle or the like as well as detecting the position of a user by walking. Since such a portable navigation device is carried by the user, unlike a car navigation device that is fixedly installed in the vehicle, the user not only moves by the vehicle but also stops the vehicle in the parking lot and then walks. Even if the user has moved, the current position of the user can be grasped. However, such a portable navigation device can be used even when the user leaves the vehicle, but a new problem arises that the position of the parked vehicle cannot be determined because the vehicle and the navigation device are separated.

In particular, in multi-story parking lots attached to commercial facilities such as department stores and shopping malls in recent years, the surrounding scenery is similar to each other and has no characteristics, so it leaves the parked vehicle without remembering the parked floor and division number etc. If you forget your parking position, you may not be able to return smoothly. As an apparatus for avoiding such adverse effects, for example, in Patent Document 1, a stop position information indicating a parking position is generated by detecting a stop of a vehicle and transmitted to a mobile terminal so that the user can A navigation device that makes it possible to refer to a parking position of a vehicle is disclosed.

JP 2006-275520 A

  However, the device disclosed in Patent Document 1 is intended for a navigation device fixedly installed in a vehicle, and a user owns a terminal that receives stop position information indicating a parking position to be transmitted separately from this device. Must. In reality, there is no guarantee that such a terminal is always owned by the user, and the possibility is further reduced if the terminal is a dedicated terminal for receiving only the stop position information.

In addition, it is conceivable to use a mobile phone as the terminal, but in this case, a navigation device fixedly installed in the vehicle must be provided with a function capable of transmitting and receiving with the mobile phone, and the cost of the device itself increases. Problems arise. In addition, it is very troublesome to request and receive stop position information on the user side every time the user wants to know the parking position.

The present invention has been made in view of such circumstances, and an object thereof is to provide a portable navigation device and a navigation program capable of automatically storing and displaying the position of a vehicle parked in a parking lot. .

In order to achieve the above object, according to the first aspect of the present invention, based on a position detection means for detecting a current position, an acceleration detection means for detecting acceleration, and an acceleration change pattern detected by the acceleration detection means. a condition determination unit configured to determine the status, if the device is determined to be the first status has been stopped by the condition determination means, obtaining means for obtaining the detected current position by the position detecting means, If it is determined that the second situation moving foot to carry the device by the condition determination means, and storage control means for storing in the storage means current position acquired by the acquisition unit as a parking position, the position and displays on the map displayed on the display means current position detected by the detection means, the parking position when the parking position is stored by the storage means Characterized by comprising display control means for displaying, a.

In the invention according to claim 2 subordinate to claim 1, the parking position stored in the storage means is cleared when the situation determination means determines that the vehicle is traveling in a third situation. A parking position clearing means is provided.

In the invention according to claim 3 dependent on claim 1 or 2 , the position detecting means includes a GPS signal receiving means for receiving a positioning radio wave from a GPS satellite, and a positioning received by the GPS signal receiving means. The navigation device further detects the direction and distance traveled by the user moving from the parking position, and each time the detected direction of the user changes, History generation means for generating a movement history representing the course direction before the change and the movement distance thereof, and a route returning from the series of movement history generated by the history generation means to the attachment / detachment point stored in the attachment / detachment point storage means Route generating means for generating route data to be represented, and a route to return to the parking position according to the route data generated by the route generating means Characterized by comprising a guiding means for the inner and.

According to a fourth aspect of the present invention, based on a position detection step for detecting the current position, an acceleration detection step for detecting acceleration, and an acceleration change pattern detected by the acceleration detection step, the status of the apparatus is determined. A situation determination step, an acquisition step of acquiring the current position detected by the position detection step when the situation determination step determines that the first situation is that the apparatus has stopped, and the situation determination If it is determined that the second situation moving foot to carry the device in step, a storage control step of causing the storage in the storage means current position acquired by the acquisition step as a parking position, said position detecting step and displays on the map displayed on the display means current position detected by the parking position is stored by the storage means A display control step of displaying the parking position, that is executed by a computer, wherein when.

  In the present invention, even when the vehicle is parked with a portable navigation device, the parking position of the vehicle can be automatically stored and displayed without any user operation. Even without it, it becomes possible to return to the vehicle easily.

Embodiments of the present invention will be described below with reference to the drawings.
A. Configuration (1) Outline of Device FIG. 1 is a block diagram showing an overall configuration of a navigation device 10 according to an embodiment of the present invention. The navigation device 10 has a structure that can be freely attached to and detached from a mounting stand disposed on the vehicle dashboard. When the navigation device 10 is mounted on the mounting stand, the navigation device 10 is based on a known GPS navigation function, The travel speed and direction are measured to guide the travel route to the destination.

On the other hand, when the vehicle is parked in a parked state and is detached from the mounting stand, an attachment / detachment point (parking position) is stored, and a walking path of the user who walks while carrying the device 10 is detected from the attachment / detachment point. And according to the detected user's walking route and attachment / detachment point, a function of guiding and guiding the route back to the parked vehicle is provided. Below, the structure of the navigation apparatus which implement | achieves such a function is demonstrated.

(2) Device Configuration In FIG. 1, the CPU 100 controls each part of the device in accordance with 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 various programs referred to here include position storage processing and various display processing described later.

The RAM 102 includes a work area and a data area. In the work area of the RAM 102, various register / flag data used for the calculation of the CPU 100 are temporarily stored. Specifically, position information generated by a GPS signal receiving unit 105 (to be described later), geomagnetic data output from the geomagnetic sensor 108, and acceleration data output from the acceleration sensor 109 are temporarily stored.

The data area of the RAM 102 includes a temporary storage register that temporarily stores the attachment / detachment point and an attachment / detachment point register that stores the attachment / detachment point temporarily stored in the temporary storage register. The purpose of the attachment / detachment points stored in these registers will be described later. In the data area of the RAM 102, a walking history output from the route search unit 106 described later is stored.

The operation unit 103 includes various operation buttons and operation switches, generates operation events corresponding to the types of buttons and switches to be operated, and supplies them to the CPU 100. The display unit 104 displays the current position on a map in accordance with a display control signal supplied from the CPU 100, and displays a route for returning to the parked vehicle. The GPS signal receiving unit 105 receives positioning radio waves from GPS satellites according to instructions 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 route search unit 106 is a work area of the RAM 102 when the GPS signal receiving unit 105 cannot receive the positioning radio wave and the detachment point is stored in the detachment point register provided in the data area of the RAM 102. Based on the geomagnetic data and acceleration data stored in, every time the user's direction of walking changes from the parking position (attachment / detachment point), a walking history that represents the direction of the route before the change of direction and the distance traveled is generated. The data is stored in the data area of the RAM 102. In addition, when route data is requested from the CPU 100 side, the route search unit 106 generates route data representing a route from the current position to the parked vehicle with reference to the walking history stored in the data area of the RAM 102. The data is sent to the CPU 100 side.

  The map database 107 stores and manages map data expressed in a vector format by dividing it into rectangular areas called meshes. The geomagnetic sensor 108 outputs geomagnetic data representing two-axis (X, Y) components of geomagnetism detected using, for example, an MI element whose impedance changes in accordance with a change in the external magnetic field. A plurality of pieces of geomagnetic data output from the geomagnetic sensor 108 are captured by the CPU 100 for a predetermined period and stored in the work area of the RAM 102.

The acceleration sensor 109 detects a triaxial acceleration component by a piezoresistive type or a capacitance type detection mechanism, and outputs acceleration data for each triaxial component. A plurality of acceleration data for each of the three-axis components output from the acceleration sensor 109 are captured by the CPU 100 for a certain period and stored in the work area of the RAM 102. The acceleration discriminating unit 110 analyzes the waveform change of the acceleration data for each of the three-axis components stored in the work area of the RAM 102, and based on the characteristic change pattern obtained thereby, that is, “vehicle moving”. Then, it is discriminated whether the “detaching operation” of the apparatus 10 or “walking movement” of the user carrying the apparatus 10 is generated, and a status flag indicating the determined status is generated and supplied to the CPU 100.

B. Operation Next, the operation of the navigation device 10 configured as described above will be described with reference to FIGS. FIG. 2 is a flowchart showing the operation of the position storage process executed by the CPU 100. FIG. 3 is a flowchart showing the operation of various display processes called from the position storage process. FIG. 4 is a flowchart showing an operation of route search processing executed by the route search unit 106.

(1) Operation of position storage processing When the power of the navigation device is turned on, the GPS signal receiving unit 105 is used for positioning from a GPS satellite in accordance with instructions from the CPU 100 in steps SA1 to SA2 of the position storage processing shown in FIG. A radio wave signal is received (GPS signal reception process), and position information including at least the latitude and longitude of the current location is generated from the received GPS signal (position information calculation process). The position information (current position) obtained by the position information calculation process in step SA2 is stored in the work area of the RAM 102.

  Subsequently, in step SA3, a map data search process for searching the map database 107 for mesh map data including position information stored in the work area of the RAM 102 is executed. Next, in step SA4, various display processes for displaying the current position specified by the position information on the map indicated by the map data searched in step SA3 and displaying the route back to the parked vehicle. Execute. Details of various display processes will be described later.

Next, in step SA5, according to an instruction from the CPU 100, the acceleration determination unit 110 executes a triaxial acceleration sensor measurement process. In this process, when the CPU 100 captures a plurality of acceleration data for each of the three-axis components output from the acceleration sensor 109 for a predetermined period and stores them in the work area of the RAM 102, the acceleration determination unit 110 stores the three-axis components stored in the work area of the RAM 102. A change in the waveform of the acceleration data for each time is analyzed to determine the current situation ("moving vehicle", "detaching operation" and "walking"), and a situation flag representing the result is generated and supplied to the CPU 100.

  In steps SA <b> 6 to SA <b> 11, the CPU 100 executes a process according to the status flag supplied from the acceleration determination unit 110. That is, if the current situation represented by the situation flag is “car moving”, the determination result in step SA 6 is “YES”, the process proceeds to step SA 9, and is stored in the attach / detach point register in the data area of the RAM 102. After clearing the attachment / detachment point, the process returns to step SA1 described above, and the GPS signal receiving unit 105 calculates the current location information again.

When the current situation represented by the situation flag is “attachment / detachment operation”, that is, when the user performs an attachment / detachment operation to remove the device 10 from the attachment stand in the parking state where the vehicle is stopped, the determination result in step SA7 is “ "YES", the process proceeds to step SA10, and the current position (parking position) is stored in the temporary storage register in the data area of the RAM 102 to set the current position (parking position) as an attachment / detachment point. Then, the process returns to step SA1 and the GPS signal is received again. The unit 105 calculates position information of the current location.

When the current situation represented by the situation flag is “walking movement”, that is, when the user carrying the device 10 removed from the parked vehicle moves on foot, the determination result in step SA8 is “YES”. Thus, the process proceeds to step SA11, and after the detachment point (parking position) stored in the temporary storage register in the data area of the RAM 102 is stored in the detachment point register, the process returns to the above-described step SA1, and the GPS signal receiving unit 105 again. To calculate the current location information.

(2) Various Display Processing Operations Next, various display processing operations will be described with reference to FIG. When this process is executed via step SA4 (see FIG. 2) of the position storage process described above, the CPU 100 proceeds to step SB1 shown in FIG. 3, and the map data retrieved from the map database 107 in step SA3 described above. And displaying the map on the display unit 104 and displaying the current position (position information stored in the work area of the RAM 102) on the displayed map.

  Next, in step SB2, whether or not the attachment / detachment point (parking position) is stored in the attachment / detachment point register in the data area of the RAM 102, that is, the user carrying the device 10 removed from the parked vehicle “walks”. Determine whether or not. If it is not “walking”, since the attachment / detachment point (parking position) is not stored in the attachment / detachment point register, the determination result is “NO”, and this processing is finished. On the other hand, if the user carries this device 10 removed from the parked vehicle and “walks”, the determination result in Step SB2 is “YES”, and the process proceeds to Step SB3.

In step SB3, it is determined whether the attachment / detachment point (parking position) is outside the map display target. For example, when a parking lot is provided inside a facility such as a shopping mall, the map is displayed as a display target on the map, but the parking lot inside the facility is a map. It means that it is not a display target and is not displayed on a map. In this case, it is often impossible to receive positioning radio waves from GPS satellites because they are inside the facility.

If the attachment / detachment point (parking position) is a map display target, the determination result in step SB3 is “NO”, the process proceeds to step SB4, and the attachment / detachment point (parking position) is displayed on the displayed map. Next, the current position calculated by the GPS signal receiving unit 105 is sent to the route search unit 106 to request route data (step SB5). In this case, when route data is requested from the CPU 100, the route search unit 106 generates route data representing a route from the current position sent with reference to the map data to the attach / detach point (parking position), and sends the route data to the CPU 100 side. Send it out. Then, in step SB6, the route data generated by the route search unit 106 is acquired, and in the subsequent step SB7, the acquired route data is displayed on the map of the display unit 104, and this processing is finished.

On the other hand, if the attachment / detachment point (parking position) is not a map display target, the determination result in step SB3 is “YES”, and the process proceeds to step SB5 to request route data from the route search unit 106. As will be described later, in this case, there is a possibility that positioning radio waves from GPS satellites may not be received. Therefore, when the route search unit 106 requests route data from the CPU 100, the walking history stored in the data area of the RAM 102 is displayed. The route data representing the route from the current position to the attachment / detachment point (parking position) is generated and sent to the CPU 100 side. Then, in step SB6, the route data generated by the route search unit 106 is acquired, and in the subsequent step SB7, the acquired route data is displayed on the display unit 104, and this processing is finished.

(3) Operation of Route Search Process Next, the operation of the route search process executed by the route search unit 106 will be described with reference to FIG. When the route search process is executed, the route search unit 106 proceeds to step SC1 shown in FIG. 4 to determine whether or not the attachment / detachment point (parking position) has been stored in the attachment / detachment point register in the data area of the RAM 102. Judging. If the attachment / detachment point (parking position) has not been stored, the determination result is “NO”, and the flow proceeds to Step SC2.

  In step SC2, it is determined whether or not the attachment / detachment point has been cleared, that is, whether or not the current situation is determined to be “moving the vehicle”. If it is determined that the current situation is “car moving”, the determination result is “YES”, the process proceeds to step SC3, the walking history stored in the data area of the RAM 102 is cleared, and the process proceeds to step SC1 described above. return. On the other hand, if the current situation is other than “moving the vehicle”, the determination result in step SC2 is “NO”, and the process returns to step SC1.

  When the attachment / detachment point (parking position) is stored in the attachment / detachment point register in the data area of the RAM 102, the determination result in Step SC1 is “YES”, and the flow proceeds to Step SC4. In step SC4, the CPU 100 is requested to acquire acceleration data. Then, the CPU 100 captures a plurality of acceleration data for each of the three axis components output from the acceleration sensor 109 for a certain period and stores them in the work area of the RAM 102. The acceleration data for each of the three-axis components stored in the work area of the RAM 102 represents the acceleration when the user carries the present apparatus 10 removed from the parked vehicle and “walks”.

  Subsequently, in step SC5, the route search unit 106 calculates the walking distance based on the acceleration data stored in the work area of the RAM 102. Next, at step SC6, when CPU 100 is requested to acquire geomagnetic data, a plurality of geomagnetic data output from geomagnetic sensor 108 by CPU 100 are fetched for a certain period and stored in the work area of RAM 102. Based on these geomagnetic data, a route search unit is obtained. 106 detects the direction of the user's walking path.

  In step SC7, the traveling direction detected in step SC6 is compared with the traveling direction detected last time to determine whether or not there is a direction change. If there is no change in the direction of travel, the determination result is “NO”, and the process returns to step SC1. Thereafter, until the direction of travel changes, steps SC1 to SC7 are repeated to continue calculating the walking distance. If there is a change in the direction of travel, the determination result in step SC7 is “YES”, and the flow proceeds to step SC8. In step SC8, a walking history representing the traveling direction before the direction change and the walking distance is generated and stored in the data area of the RAM 102.

  Next, in step SC9, it is determined whether or not there is a request for route data from the CPU 100 side. If there is no request for route data, the determination result is “NO”, and the process returns to step SC1. Thereafter, steps SC1 to SC9 are repeated until there is a request for route data from the CPU 100 side. Thus, every time the direction of the user who walks away from the parking position (attachment / detachment point) changes based on the geomagnetic data and acceleration data stored in the work area of the RAM 102, the direction of the route before the direction change and the movement distance thereof. Are sequentially generated and stored in the data area of the RAM 102.

  When there is a request for route data from the CPU 100 side, the determination result in step SC9 is “YES”, and the flow proceeds to step SC10. In steps SC10 to SC11, if the attachment / detachment point (parking position) is a map display target, route data representing a route from the current position to the attachment / detachment point (parking position) is obtained with reference to the map data. On the other hand, if the attachment / detachment point (parking position) is not a map display target, route data representing a route from the current position to the attachment / detachment point (parking position) with reference to a series of walking histories stored in the data area of the RAM 102. Is generated. That is, the series of walking histories stored in the data area of the RAM 102 represents the forward path to the current position, so that the return path from the current position to the attachment / detachment point (parking position) by the route search that reverses this is performed. Get route data representing. In any case, the obtained route data is sent to the CPU 100 side, and then the process returns to step SC1.

  As described above, in this embodiment, the acceleration discriminating unit 110 analyzes the waveform change of the acceleration data for each of the three axis components stored in the work area of the RAM 102 and analyzes the current situation (“car moving”, “removing operation” ”And“ walking movement ”), and if the determined situation is“ moving the vehicle ”, the detachment point stored in the detachment point register in the data area of the RAM 102 is cleared. When the attachment / detachment point is cleared, the current position is displayed on the map in various display processes (see FIG. 3) executed by the CPU 100, and the walking history is cleared in the route search process (see FIG. 4) executed by the route search unit 106. To do.

  Then, when the user performs an operation of removing the device 10 from the mounting stand in the parked state where the vehicle is stopped, and the current situation is determined as “attachment / detachment operation”, the current position (parking position) is set as the attachment / detachment point. Therefore, the data is stored in the temporary storage register in the data area of the RAM 102. Further, when the user carrying the removed device 10 moves on foot, and the current situation is determined to be “walking”, the attachment / detachment point (parking position) of the temporary storage register in the data area of the RAM 102 is determined. Stored in the attach / detach point register.

  Thus, when the attachment / detachment point (parking position) is stored in the attachment / detachment point register, in the route search process (see FIG. 4) executed by the route search unit 106, the parking position (attachment / detachment point) is based on the geomagnetic data and the acceleration data. Every time the route direction of the user who walks from the foot changes, a walking history representing the route direction before the route change and the moving distance is generated and stored in the data area of the RAM 102.

Then, when route data is requested from the CPU 100 side, if the attachment / detachment point (parking position) is a map display target, route data representing a route from the current position to the attachment / detachment point (parking position) is obtained with reference to the map data. . On the other hand, if the attachment / detachment point (parking position) is not the map display target, the CPU 100 side generates route data representing the route from the current position to the parked vehicle with reference to the walking history stored in the data area of the RAM 102. To send. The CPU 100 displays the route data acquired from the route search unit 106 in various display processes (see FIG. 3). As a result, it is possible to guide the route back to the parked vehicle.

In the above-described embodiment, the route data representing the route from the current position to the parked vehicle is displayed on the display unit 104. However, the present invention is not limited thereto, and the content of the route data is uttered by voice synthesis. The route returning to the parking position may be guided and guided by voice, or the screen display and voice guidance may be combined.

It is a block diagram which shows the structure of one Embodiment by this invention. It is a flowchart which shows the operation | movement of the position memory process which CPU100 performs. It is a flowchart which shows operation | movement of the various display processes which CPU100 performs. It is a figure for demonstrating operation | movement of the route search process which the route search part 106 performs.

Explanation of symbols

100 CPU
101 ROM
102 RAM
DESCRIPTION OF SYMBOLS 103 Operation part 104 Display part 105 GPS signal receiving part 106 Route search part 107 Map database 108 Geomagnetic sensor 109 Acceleration sensor 110 Acceleration discrimination | determination part

Claims (4)

Position detection means for detecting the current position;
Acceleration detecting means for detecting acceleration;
Based on the acceleration change pattern detected by the acceleration detection means, situation determination means for determining the situation;
Obtaining means when the device is determined to be the first situation that has stopped, to get the current position detected by said position detecting means by said condition determination means,
A storage control means for storing the current position acquired by the acquisition means in the storage means as a parking position when it is determined by the situation determination means as a second situation that the apparatus is carried and walked on foot ;
Display control means for and displays on the map displayed on the display means current position detection, and displays the parking position when the parking position is stored by said memory means by said position detecting means,
A navigation device comprising: The parking position clearing means for clearing the parking position stored by the storage means when the situation determining means determines that the vehicle is traveling in a third situation. The navigation device according to 1. The position detecting means comprises a GPS signal receiving means for receiving positioning radio waves from GPS satellites, and a position calculating means for calculating the current position from the positioning radio waves received by the GPS signal receiving means,
The navigation device further detects a route direction and a travel distance of a user who moves from the parking position, and generates a travel history indicating the route direction before the change and the travel distance each time the detected user's route direction changes. Generated by the history generation means, route generation means for generating route data representing a route from the series of movement histories generated by the history generation means to the parking position stored in the storage means, and the route generation means Guidance guidance means for guiding the route back to the parking position according to the route data;
The navigation apparatus according to claim 1 or 2, characterized in that comprises a. A position detection step for detecting the current position;
An acceleration detection step for detecting acceleration;
A status determination step of determining the status of the apparatus based on the acceleration change pattern detected by the acceleration detection step ;
An acquisition step of acquiring a current position detected by the position detection step when it is determined in the situation determination step that the first state is stopped ;
A storage control step of storing the current position acquired in the acquisition step as a parking position in a storage means when it is determined as a second situation in which the apparatus is carried on foot in the situation determination step;
And displays on the map displayed on the display means current position detected by the position detection step, and a display control step of displaying the parking position when the parking position is stored by the storage means,
A navigation program characterized in that the program is executed on a computer.

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