JP4941276B2 - Navigation device, map information update method thereof, and map information update program - Google Patents

Description

  The present invention relates to a navigation device, a map information update method thereof, and a map information update program.

  A vehicle-mounted navigation device receives signals transmitted from a plurality of GPS (Global Positioning System) satellites to detect the current position of the vehicle, and a direction in which the vehicle's head is directed by a sensor such as a gyroscope. Or, obtain information on the running state and the like. Further, the navigation device matches the current position of the own vehicle with a road on the map based on the map information stored in the storage area, and displays the current position of the own vehicle on the map displayed on the display unit. . In addition, there are some that have a function of guiding a route to a destination desired by the user.

  By the way, since the road or the facility changes, the vehicle may travel on a road that is not in the map information stored in the navigation device. While the vehicle is traveling on a road that is not in the map information, the navigation device displays as if it is traveling on a place that is not a road, and furthermore, it cannot guide to the destination or repeatedly guides a route that is different from the user's intention. Problems may occur.

Therefore, when a vehicle equipped with a navigation device travels on a road not included in the map information, there is a method of writing the travel position as new road data in the map information. Also, a navigation device has been proposed in which new road data is not written in map information in a place where the GPS receiver is in poor reception. This is because, in a place where the reception status of the GPS receiver is poor, the detection accuracy of the current position of the vehicle is low, so that the position error of the detected new road data is large and accurate road data cannot be obtained. (For example, see Patent Document 1.)
JP 2002-48559 A (Claim 1 etc.)

  However, the above method has the following problems. That is a problem that the position information received by the GPS receiver in a place where the reception condition is good is not always correct. For example, in the vicinity of an intricate high-rise building, incorrect position information may be acquired by radio waves reflected on the high-rise building. Further, the above-described method has a problem that it cannot be used in a place where a GPS signal cannot be received. For example, since the GPS signal cannot be received in the tunnel, the above method cannot be applied.

  In addition, there is a case where the position information is acquired using a means for acquiring position information other than the GPS receiver, for example, an acceleration sensor. However, for example, when an acceleration sensor is used, there is a problem that accurate position information is difficult to obtain due to the influence of the sensor fixing state and the vibration of the vehicle.

  Therefore, the present invention solves the above problem, that is, when traveling on a road that is not in the map information, the navigation device that can effectively determine whether or not the route is updated to the map information, the map information update The object is to provide a method and a map information update program.

  In order to achieve such an object, in a navigation device that displays a map and guides a route to a destination, storage means for storing map information for displaying the map and updating new map information; Two or more position detection means for detecting the current position of the navigation device as a detection position, and it is determined whether or not the detection position detected by the position detection means exists on the road of the map New detection route detection means for detecting a trajectory connecting a plurality of detection positions as a new detection route when the road data presence / absence determination means and the road data presence / absence determination means determine that the detection position is not on the road of the map. And whether or not the new detected route is updated as new road data, the new detected route is equal to or higher than a predetermined distance at a predetermined traveling speed or higher. A navigation apparatus comprising: a newly detected route discriminating unit that divides and discriminates a newly detected route into one or more newly detected sections, and a road data update unit that updates the new road data to the storage unit based on whether or not the vehicle has been performed. It is said.

  In another invention, in addition to the above-described invention, the newly detected route determining means determines to update the road data only when the newly detected section has traveled a predetermined number of times or more.

  In another invention, in addition to the above-described invention, the new detection path determination means receives and detects acceleration sensor position information by the acceleration sensor and GPS signals transmitted from a plurality of satellites within the new detection section. When the frequency with which the received GPS position information matches is a predetermined number of times or more, it is determined to update as road data.

  In another invention, in addition to the above-described invention, the newly detected route determination means causes the user to determine whether or not to update as new road data.

  In another invention, in addition to the above-described invention, the newly detected route determination means determines whether the start point or the end point of the newly detected route is on a road.

  Another invention is a method for updating new road data to map information of a navigation device that displays a map and guides a route to a destination, and includes two or more types using the current position of the navigation device as a detection position. In the position detection step detected by the method, the road data presence / absence determination step that determines whether or not the detection position detected by the position detection step exists on the road of the map, and the road data presence / absence determination step If it is determined that the position is not on the road, a new detection route detection step for detecting a new detection route connecting the trajectories of a plurality of detection positions, and whether or not the new detection section is updated as new road data. A new detection route determination step for determining the new detection route by dividing it into one or more new detection sections, and new road data It is the road data update step of updating, the map information updating method of a navigation apparatus having a storage means.

  Further, in another invention, there is a program for updating map information that causes a computer to execute a process of updating new road data to map information of a navigation device that displays a map and guides a route to a destination. Storing map information for displaying a map, storage means capable of updating new map information, and two or more position detecting means for detecting the current position of the navigation device as a detection position, In the road data presence / absence determination means and road data presence / absence determination means for determining whether or not the detection position detected by the position detection means exists on the road of the map, it is determined that the detection position is not on the road of the map. A new detection path detecting means for detecting a trajectory connecting a plurality of detection positions as a new detection path; Whether or not the detected route is updated as new road data is determined by dividing the new detected route into one or more new detected sections based on whether or not the new detected route has traveled more than a predetermined distance at a predetermined traveling speed or higher. A computer-readable map information update program that functions as a newly detected route discriminating unit that performs the road data update unit that updates the new road data to the storage unit.

  According to the present invention, when traveling on a road that is not stored in map information, the navigation device that can effectively determine whether or not the route is updated to map information, the map information update method, and the map information update program Can provide.

  Hereinafter, an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing a configuration example of a navigation device 1 according to an embodiment of the present invention.

  The navigation device 1 includes a main body 1a, a GPS receiver 2, an acceleration sensor 3, other sensors 4, an input device 5, and a display unit 10. The main body 1 a includes a CPU (Central Processing Unit) 6, an HDD (Hard Disk Drive) 7, a memory 8, and a video control unit 9. The GPS receiver 2, acceleration sensor 3, other sensor 4, input device 5, HDD 7, memory 8, and video control unit 9 are connected to the CPU 6. The display unit 10 is connected to the video control unit 9.

  The GPS receiver 2 receives radio waves from a plurality of GPS satellites (not shown). In addition, the GPS receiver 2 extracts time information superimposed on the received radio waves, and from the arrival time difference between the radio waves, current position information (for example, latitude information and longitude information) of the vehicle on which the navigation device 1 is mounted. ) For detecting position). The obtained position information is output to the CPU 6.

  As the acceleration sensor 3, a MEMS (micro electro mechanical systems) sensor made of a semiconductor can be suitably used. For example, an acceleration sensor 3 including a sensor chip that converts detected acceleration into capacitance and a conversion unit that converts capacitance into voltage can be suitably used. The acceleration sensor 3 is position detection means different from the GPS receiver 2 and can detect displacement in the height direction of the vehicle on an uphill or downhill. Therefore, the CPU 6 can obtain the vehicle position information from the acceleration sensor 3 in addition to the two-dimensional vehicle position information from the GPS receiver 2.

  The other sensor 4 corresponds to, for example, a side brake sensor that detects that the side brake is operated, or a gyro device that detects the angular velocity of the vehicle with respect to each control axis when the vehicle changes its direction. The other sensor 4 gives various information to the CPU 6.

  The input device 5 gives a user instruction input from, for example, a push button, a touch panel, or a remote controller as an input signal to the CPU 6.

  The CPU 6 is a signal processing unit. In the present invention, the CPU 6 determines whether or not the detection position indicating the current position at the time of detection detected by the GPS receiver 2 or the acceleration sensor 2 is present on the road of the map. Functions as a means. In addition, when the road data presence / absence determination unit determines that the detection position is not on the road of the map, the CPU 6 detects a path connecting the plurality of detection positions as a new detection path, and Whether or not to update the new detected route as new road data is determined based on whether or not the new detected route has traveled more than a predetermined distance at a predetermined traveling speed or more using the two or more position detecting means. It also functions as a new detection path discriminating means for discriminating the detection path by dividing it into one or more new detection sections. The CPU 6 receives instructions or various signals from the GPS receiver 2, acceleration sensor 3, other sensor 4, or input device 5. Then, the CPU 6 reads a predetermined program stored in the memory 8 or a hard disk in the HDD 7 and executes processing such as various calculations. Further, the CPU 6 outputs the processed data to each unit. Further, in this specification, an update indicates one or a combination of data update, revision, addition, and deletion.

  The memory 8 includes a ROM (Read Only Memory) and a RAM (Random Access Memory). The ROM stores a control program for the CPU 6 to control each unit and each constant. For example, the ROM stores an OS (Operating System) program of the navigation apparatus or an application program that operates on the OS. The RAM temporarily stores communication information with various devices based on a control command from the CPU 6. The RAM is used as a work memory for the CPU 6. The memory 8 may be a storage unit that stores part or all of the information stored in the HDD 7 described later.

  The HDD 7 serving as a storage unit is built in the main body 1 a of the navigation device 1. FIG. 2 is a configuration diagram for explaining a configuration of information in the HDD 7. The HDD 7 stores a map information DB (Data Base) 71 and a control program 72. The map information DB 71 is a storage area having both a storage area where data is already stored and an additional storage area where additional data can be written.

  Here, the map information DB 71 is an aggregate of map data including information for displaying a map, information about facilities, and the like. Map data is stored for each map scale. For example, FIG. 2 includes map data 73a having a scale of 1/10000, map data 73b having a scale of 1/1000, and map data 73c having a scale of 1/1000. Yes. The map data at each scale includes map display level management information for displaying a map, and units separated by longitude and latitude widths of appropriate sizes according to various scale levels. Each unit stores the layer of the partition portion. For example, the map data 73a includes map display level management information 75 and units 76a to 76m. The unit 76a includes a unit header 78 for indicating the contents of the unit, a character layer 79, a background layer 80, A road layer 81, an enlarged view layer 82, and an option layer 83 are included.

  FIG. 3 is an example of a screen display 84 when a map is displayed on the display unit 10. FIG. 4 is a diagram for explaining each layer for creating the screen display 84 of FIG.

  The screen display 84 is generated by combining the road layer 81, the background layer 80, and the character layer 79. The road layer 81 is a layer for displaying a road. The background layer 80 has a role of displaying a building, a facility, a park, a river, or the like on the map screen. The character layer 79 has a role of displaying characters, map symbols, and the like such as administrative division names such as municipalities, road names, intersection names, and facility names.

  The road layer 81 includes road data and display information for displaying a road using the road data. The road data uses data related to coordinate points (nodes) and lines (links) to indicate the position of the road. For example, as shown in FIG. 5, the road includes a node 40, a node 41, a node 43 and a node 44, an intersection node 45, a link 46 connecting the node 41 and the intersection node 45, a node 43 and the intersection node 45. The position of the road is stored by the link 47 that connects, the link 48 that connects the node 44 and the node 43, and the link 49 that connects the node 40 and the intersection node 45. In the road data, the node number, latitude and longitude of each node, link number and link distance of the link, road type, road width, and the like are recorded. In the present embodiment, the road layer 81 has both road data and display information for displaying the road. However, the present invention is not limited to this configuration, and the road layer 81 is used only as road information, and the background layer 80 described later may include information for displaying a road based on road data.

  The control program 72 includes a program for executing a process for displaying a map or a process for searching for a route to a destination. Specifically, a program for executing a process for displaying a desired map from the map information stored in the map information DB 71 based on the vehicle position information supplied from the GPS receiver 2 is included. In the present embodiment, the control program 72 is an image such as a route search program 74a for searching for a route, management information 74b for managing the control program, and an icon indicating processing or vehicle position for display on the screen. The drawing parameter 74c is included as data. Further, the control program 72 provides information necessary for performing destination search, for example, information such as an address, a telephone number or a postal code, or information for displaying VICS (Vehicle Information and Communication System) information. May be included.

  The video control unit 9 synthesizes video data and the like input from the CPU 6 and gives one video signal to the display unit 10. That is, the video control unit 9 functions as a drawing processing unit for displaying an image. Specifically, a character layer 79, a background layer 80, a road layer 81, and the like for constituting a map around the vehicle position are input from the CPU 6 to the video control unit 9. In addition, icon data indicating the position of the vehicle, display information thereof, and the like are also input from the CPU 6 to the video controller 9. Then, the video control unit 9 synthesizes the data in order to superimpose and display the data. Then, the video control unit 9 converts the combined data into one video signal. Further, the video control unit 9 outputs the video signal to the display unit 10.

  The display unit 10 is preferably configured from a liquid crystal display or the like. Further, when the video signal converted by the video control unit 9 is input to the display unit 10, video based on the video signal can be displayed and output on the display unit 10.

  Next, the operation of the embodiment of the navigation device 1 will be described. FIG. 6 is a flowchart for explaining a schematic operation of the navigation device 1.

  When the navigation apparatus 1 is turned on, the GPS receiver 2, the acceleration sensor 3, the other sensors 4, and the like start to acquire position information and vehicle information (step S101). A signal is input to the CPU 6 from the GPS receiver 2 and the acceleration sensor 3 as vehicle position information. The CPU 6 processes these signals with a predetermined program to obtain the GPS position information acquired by the GPS receiver 2 and the position information based on the acceleration acquired by the acceleration sensor, and detects the current position at the time of detection. It detects as a position (step S102: position information detection step). Next, the CPU 6 searches for a unit including the detected position from the units 76a to 76m in the map information DB 71 stored in the hard disk in the HDD 7 based on the position information (step S103). Then, the CPU 6 supplies each layer stored in a desired unit to the video control unit 9. The CPU 6 also supplies display information such as an icon for displaying the latest detected position on the map as the current position to the video control unit 9. Therefore, the video control unit 9 creates a map image in which each layer and icon data are superimposed (step S104). The created map image is converted into a video signal by the video control unit 9, and the video signal is output to the display unit 10. Then, an image such as a map is displayed on the display unit 10.

  When the creation of the map image is completed in step S104, the CPU 6 compares the road data included in the road layer 81 stored in the map information DB 71 with the vehicle position information, and the vehicle is positioned on the road. (Step S105: road data presence / absence determination step). When it is determined that the vehicle is on the road (YES in step S105), steps S102 to S105 are repeated (NO in step S107) until the operation of navigation device 1 is terminated.

  On the other hand, if it is determined that the vehicle is located at a place other than on the road, that is, if a negative (NO) determination is made in step S105, the newly detected route (hereinafter, new) The travel speed on the detected route and the newly detected route are stored (step S106: new detected route detecting step). It is determined whether or not the newly detected route is updated as a new road (step S108: new detected route determination step). If the determination is affirmative (YES) in step S108, the CPU 6 updates the newly detected route to the road layer (step S109: road data update step). After step S109 or in the case of a negative (NO) determination in step S108, the process returns to step S102.

  FIG. 7 is a flowchart for explaining processing for determining whether or not the navigation device 1 updates the newly detected route as a new road in step S108 in FIG.

  FIG. 8 is an explanatory diagram illustrating a travel route of a vehicle on which the navigation device 1 is mounted. Moreover, FIG. 9 is explanatory drawing which expands and demonstrates the area between the point 30 and the point 38 of FIG.

  In the present embodiment, the vehicle equipped with the navigation device 1 travels on the road 21 from east to west. In the map information DB 71 of the navigation device 1, there is no road connecting the road 21 and the road 22 between the road 20 and the road 23. However, the vehicle makes a right turn at a point 30 between the road 20 and the road 23, then goes south (downward in the paper), turns left at a point 38 that abuts the road 22 extending east-west, and turns the road 22 to the west. You are driving towards. Accordingly, the navigation device 1 records the new detection route and the traveling state such as the speed in the new detection route between the point 30 and the point 38.

  When the new detection path is recorded, the CPU 6 divides the new detection path into one or more sections and classifies each section into an A section and a B section (step S201: first new detection section determination). Step). The B section is a section in which the vehicle travels at a predetermined speed or more and a predetermined distance or more. On the other hand, the A section travels at a predetermined speed or less, or the section is at a predetermined distance or less. For example, when a filter is set that the vehicle is traveling at 10 km or more at 20 km / h or higher, the section that has traveled at 20 km / h or lower or that is 20 km / h or higher and lower than 10 m is included in the A section. It is distributed. On the other hand, a section that has traveled 10 m or more at 20 km / h or more is classified as a B section. In the section A, a negative determination (NO) is made in step S201. On the other hand, a positive determination (YES) is made in Step S201 for the B section that has traveled at 10 km or higher at 20 km / h or higher.

  For example, in the new detection route between the point 30 and the point 38 illustrated in FIG. 8, the section A1 and the section A2 exist as the A section, and the section B1 and the section B2 exist as the B section. For the sections A1 and A2, a negative determination (NO) is made in step S201. On the other hand, a positive determination (YES) is made in the sections B1 and B2.

  Next, for each B section for which a positive determination (YES) is made in step S201, the CPU 6 determines whether or not the vehicle has traveled twice or more (step S203: second new detection section determination step). For example, the CPU 6 regards the route within a width of 10 m as the same route with respect to the traveling direction of the newly detected route, and determines whether or not the section B has been traveled twice or more.

  Next, the CPU 6 determines whether or not there is a coincidence portion between the GPS position information and the position information by the acceleration sensor in a certain frequency or more in each B section in which a positive determination (YES) is made in step S203. (Step S205: third new detection section determination step). For example, the CPU 6 determines whether or not there are two or more matching points between the GPS position information and the position information obtained by the acceleration sensor within a range of 10 m in one B section. If an affirmative determination (YES) is made in step S205, the section is confirmed as the first new detection section (step S206). On the other hand, if a negative determination (NO) is made in step S203 and step S205, the CPU 6 determines that the section is not written as a new road on the road layer 81 at that time.

  For the A section for which a negative determination (NO) is made in step S201, the CPU 6 first determines whether or not the section A has traveled twice or more (step S202: second new detection). Section discrimination step). If an affirmative determination (YES) is made in step S202, the CPU 6 determines whether or not there is a coincidence point between the GPS position information and the position information by the acceleration sensor at a certain frequency or more for each A section. (Step S204: third new detection path determination step). For example, the CPU 6 determines whether or not there are two or more matching points between the GPS position information and the position information obtained by the acceleration sensor within a range of 10 m in one B section. If an affirmative determination (YES) is made in step S204, the A section is confirmed as the second new detection section (step S207). On the other hand, if a negative determination (NO) is made in steps S202 and S204, the CPU 6 does not write the section A as a new road in the road layer 81.

  In the case of the example shown in FIGS. 7 and 8, the GPS position information and the position information by the acceleration sensor are point 31, point 32, point 33, point 34 in all of the sections A1, A2, B1, and B2. , Point 35, point 36, point 37 and point 38. In addition, the point 31, the point 32, the point 33, the point 34, the point 35, the point 36, the point 37, and the point 38 exist in the section A1, the section A2, the section B1, and the section B2 at two or more points within a range of 10 m. To do. Therefore, the section B1 and the section B2 are recognized as the first new detection section, and the section A1 and the section A2 are recognized as the second new detection section.

  Next, the CPU 6 has zero or more first new detection sections (hereinafter referred to as a first new detection section group) and zero or more second new detection sections (hereinafter referred to as a second new detection section group). It is determined whether or not new detection paths are continuously formed (step S208: continuous determination step). If a negative determination (NO) is made in step S208, the CPU 6 determines that the newly detected route is not written in the road layer 81 as a new road.

  If an affirmative determination (YES) is made in step S208, the CPU 6 determines whether or not there is one or more first new detection sections in the new detection path (step S209). If negative determination (NO) is made in step S209, that is, if the newly detected route is composed of only the second newly detected section, the CPU 6 does not write the newly detected route as a new road in the road layer 81. .

  When a positive determination (YES) is made in step S209, the CPU 6 determines that the start point and end point of the new detection path configured by the first new detection section group and the second new detection section group are existing. It is determined whether or not the vehicle is on the road (step S210: start point end point confirmation step). If the determination is affirmative (YES) in step S210, the CPU 6 determines that the new detection path is an update target. On the other hand, if the determination is negative (NO) in step S210, the CPU 6 does not write the section as a new road on the road layer.

  In the example shown in FIGS. 7 and 8, the section A1, the section A2, the section B1, and the section B2 are continuous. Furthermore, there are two sections, section B1 and section B2, as the first new detection section. Therefore, the section from the point 30 on the existing road 20 to the point 38 on the existing road 22 is determined by the CPU 6 as a new detection route to be updated.

  If a positive determination (YES) is made in step S210, the CPU 6 confirms with the user whether or not to update the newly detected route as a new road (step S211). Specifically, a new detection path to be updated is displayed on the display unit 10 and a message asking whether to update is displayed on the display unit 10. When the user inputs an instruction to update through the input device 5, the CPU 6 updates the road layer with the newly detected route as new road data, that is, adds the new road data (step S 212). Therefore, road information between the points 30 and 38 in FIG. 7 is added to the road layer 81 included in the map information DB 71. On the other hand, when the user instructs the CPU 6 from the input device 5 not to update the road (NO in step S211), the road data is not updated.

  As described above, in the navigation device 1 according to the embodiment of the present invention, not only the GPS position information but also the position information or speed information by the acceleration sensor 3 is used to newly detect the detected new detection route. It can be determined whether or not the road data should be updated to the road layer 81 as a road. Therefore, it is possible to determine whether road data should be additionally written on a road that travels a plurality of times even in a place where GPS information tends to be inaccurate or where GPS information cannot be acquired. Therefore, it is possible to realize the navigation device 1 in which only more accurate road data is updated.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and combination are possible.

  For example, in the present embodiment, the map information DB 71 is stored in the HDD 7, but the present invention is not limited to such a form. For example, the map information DB 71 may be stored in a writable storage medium such as a flash memory, DRAM, DVD-R, or CD-R. In the case where the host computer has map data and the map information is always transmitted from the host computer to the navigation device using means such as wireless communication, the road data obtained by the navigation device is obtained. You may make it the form which uploads to a host computer.

  In the present embodiment, it is determined in step S201 whether or not the newly detected section is a section traveled at 10 km or higher at 20 km / h or higher, but the speed or distance may be other values. Moreover, it is not necessary to make a determination based on a constant speed and distance at all locations. For example, in a rural area, it is determined whether or not the newly detected section is a section traveled at 30 km or more at 40 km / h or more. In an urban area, it is determined whether or not the section is a section traveled at 5 km or more at 10 km / h. It may be a thing. Further, instead of filtering by speed and distance, detection may be made by acceleration and travel time. Alternatively, the user may be able to set the detection sensitivity according to reality.

  Moreover, in this Embodiment, although it shall be able to determine whether a user finally updates, it is not restricted to such a form. For example, in step S211, the CPU 6 may update the new detection path to be updated without the user's permission. In such a case, the system may be such that new road information added by the user can be deleted later by setting the system so that the user can view the update history.

  In the present embodiment, it is determined in step S202 and step S203 whether or not the new detection section is traveling twice or more, but step S202 and step S203 are not essential. Further, step S202 and step S203 are not limited to such a form, and it may be determined whether or not the vehicle is traveling three or more times, or the determination criteria of step S202 and step S203 may be different. For example, step S202 may determine whether or not the vehicle has traveled two or more times, and step S203 may determine whether or not the vehicle has traveled three or more times.

  In the present embodiment, in step S204 and step S205, the CPU 6 determines whether or not there is a predetermined number of coincidence points between the GPS position information and the position information obtained by the acceleration sensor for each of the A section or the B section. , To judge. However, step S204 and step S205 are not essential. In addition, the position information is not limited to the GPS position information or the position information obtained by the acceleration sensor, but may be determined based on the presence of a location that matches other position information.

  In the present embodiment, in step S210, the CPU 6 determines whether the start point and the end point of the new detection route are on the road, but step S210 is not essential. Moreover, it is good also as what determines whether only a starting point or only an end point exists on a road not only in such a form. Alternatively, the case where the road is located within a certain distance from the start point or the end point may be included.

  The navigation device 1 according to the present invention is not limited to a vehicle, and can be applied to any moving body. For example, it may be used by a walking person or may be provided for a flying object.

  Moreover, in this Embodiment, it is set as the form which writes new road data in a road layer, However, It is not restricted to such a form. For example, the additional storage area may be combined together when the image is written in another additional area and the image is combined in step S104. Further, data determined not to be updated may be erased after being held for a certain period.

It is a block diagram which shows the structure of the navigation apparatus which concerns on embodiment of this invention. It is information structure explanatory drawing in HDD which the navigation apparatus of FIG. 1 has. It is an example of the image displayed on the display part of the navigation apparatus of FIG. It is a figure for demonstrating the layer structure of the image of FIG. It is a figure for demonstrating the road information contained in the road layer of FIG. It is a flowchart which shows schematic operation | movement of the navigation apparatus shown in FIG. It is a flowchart explaining the process for determining whether the new detection path | route is updated among the steps shown in FIG. It is a schematic explanatory drawing for showing the running state of the car carrying a navigation device. It is explanatory drawing expanded and shown in order to show the detailed driving | running | working state from the point 30 to the point 38 shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Navigation apparatus (computer), 2 ... GPS receiver (position detection means), 3 ... Acceleration sensor (position detection means), 4 ... Other sensors, 5 ... Input device, 6 ... CPU (Road data presence / absence determination means, new Detection section detection means, new detection section determination means, road data update means), 7 HDD (storage means), 8 Memory (storage means), 9 Video control section, 10 Display section, 71 Map information DB ( Map information)

Claims (7)

In a navigation device that displays a map and guides the route to the destination,
Storing the map information for displaying the map, and storing means capable of updating new map information;
Two or more position detection means for detecting the current position of the navigation device as a detection position,
Road data presence / absence determining means for determining whether or not the detected position detected by the position detecting means exists on the road of the map;
In the road data presence / absence determination means, when it is determined that the detection position is not on the road of the map, a new detection path detection means for detecting a trajectory connecting the plurality of detection positions as a new detection path;
Whether or not to update the new detection route as new road data, the new detection route is determined to be one or more new detection sections based on whether or not the new detection route has traveled more than a predetermined distance at a predetermined traveling speed or higher. New detection route discrimination means for dividing and discriminating;
A navigation apparatus comprising: road data update means for updating new road data to the storage means.   The navigation device according to claim 1, wherein the new detection route determination unit determines to update the road data when the new detection section is traveled a predetermined number of times or more.   The new detection path determination means has a predetermined frequency that the acceleration sensor position information by the acceleration sensor and the GPS position information detected by receiving GPS signals transmitted from a plurality of satellites coincide with each other within the new detection section. The navigation apparatus according to claim 1, wherein when the number of times is greater than or equal to the number of times, it is determined that the road data is updated.   The navigation apparatus according to any one of claims 1 to 3, wherein the new detection route determination unit causes the user to determine whether or not to update the new road data.   The navigation apparatus according to any one of claims 1 to 4, wherein the new detection route determination unit determines whether a start point or an end point of the new detection route is on a road. A method of updating new road data to map information of a navigation device that displays a map and guides a route to a destination,
A position detection step of detecting the current position of the navigation device as a detection position by two or more types of methods;
Road data presence / absence determination step for determining whether or not the detection position detected by the position detection step exists on the road of the map;
In the road data presence / absence determination step, when it is determined that the detection position is not on the road, a new detection path detection step for detecting as a new detection path connecting a plurality of trajectories of the detection positions;
A new detection route determination step for determining whether the new detection section is updated as new road data by dividing the new detection route into one or more new detection sections;
A road data update step for updating the new road data to the storage means;
A map information update method for a navigation device, comprising: A program for updating map information that causes a computer to execute a process of updating new road data to map information of a navigation device that displays a map and guides a route to a destination,
Computer
Storage means for storing the map information for displaying the map and updating the new map information,
Two or more position detection means for detecting the current position of the navigation device as a detection position,
Road data presence / absence determination means for determining whether or not the detection position detected by the position detection means exists on the road of the map;
If the road data presence / absence determining means determines that the detected position is not on the road of the map, a new detected path detecting means for detecting a trajectory connecting the plurality of detected positions as a new detected path;
Based on whether or not the new detected route has been traveled more than a predetermined distance at a predetermined traveling speed or more as to whether or not the new detected route is updated as new road data, the new detected route is set to one or more new detected sections. New detection path discrimination means for dividing and discriminating,
Road data update means for updating new road data to the storage means,
A computer-readable map information update program that functions as a computer.

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