JPH0894371A - Navigation device for vehicle - Google Patents

Abstract

PURPOSE: To enable a navigation device for vehicle to search a route to be guided which is different from the current route being guided even when its own vehicle runs along the current route by searching the different route by means of a route searching means. CONSTITUTION: A navigation device for vehicle is provided with an input-output device 1 which inputs and outputs the information about the guidance of a route, present location detector 2 which detects the information about the present location of its own vehicle, information storing device 3 in which navigation data required for calculating routes, displaying guidance data required for guidance, etc., are stored, and central processing unit 4 which performs route searching processing and displaying guidance processing required for guiding routes and, at the same time, controls a whole system. The route searching means of the unit 4 searches a route which is different front the route being guided stored in a route storing means (RAM 42) when a route running discriminating means discriminates that the vehicle runs along the route being guided or the input device 1 instructs the route searching means to search a different route.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle navigation system capable of searching for another guidance route on a preset guidance route.

[0002]

2. Description of the Related Art A vehicular navigation system is mounted on a vehicle to search a route from a current position to a destination and guide the route based on the searched route, thereby burdening the driver when traveling on an unfamiliar road. It alleviates. Therefore, the vehicular navigation device has a function of searching a route from the current position to the destination by inputting the destination, and displays the route obtained by the search. Also,
It has a function to detect the current position of the vehicle, displays the route obtained by searching, and displays the current position of the vehicle together with the route obtained by detecting the current position of the vehicle and guides the route. It is carried out.

In such a system that unambiguously searches for a route to a destination, a guidance route desired by a driver is not necessarily provided, that is, a driver must pass through a crowded city area. For some reasons, it may not be desirable to drive on the first route searched. Therefore, for example, in the vehicle running guidance device disclosed in Japanese Patent Laid-Open No. 5-165407, the cost of a line segment from a starting point to a destination set on a road map based on digital map data is determined according to the degree of cost. Multiple routes are sequentially searched in order, and at this time, the cost of the line segment on the previously searched route is apparently increased so that another route different from the previously searched route is searched next. It is configured so that a route different from the route previously searched can be searched and selected by searching for a route having the lowest cost of the line segment without any processing.

[0004]

The conventional vehicle travel guide device as described above is effective when it is known in advance that there will be congestion when searching for a route from a starting point to a destination. If the driver wants to drive on a different route due to unexpected traffic congestion, construction, etc., on the way to the route, if you try to deal with it, set the destination again as the starting point and reach the destination. , Or another route is selected and selected as described above to bypass the traffic jam or the construction section. In addition, when another route is searched for by predicting that traffic will usually be congested, there is a case where the searched route is rather congested instead of congested. In such a case, again, in order to search for another route, the destination is set again and the route to the destination is searched, or as described above, another route is searched for and selected, thereby causing traffic congestion or construction work. You must bypass the section.

Further, as another method for coping with traffic jams and construction sections, a method of intentionally deviating from the initially set route and re-searching to bypass the congestion sections and construction sections is also considered. To be This re-search function connects to the preset guidance route from the current vehicle position when it detects that the vehicle has deviated from the guidance route while the vehicle is traveling on the preset guidance route. The route to be searched is searched. By using this function,
In some cases, you can bypass the traffic jam section and the construction section. But,
When the guide route is intentionally deviated and a re-search is performed, a route connected to the preset guide route is not always found, and in some cases, the deviated route may be a dead end. In such a case, it is necessary to drive the vehicle in a different direction from the existing route and perform the re-search. In addition, even if it is possible to connect to a preset route, the connection point is a point in the congestion section or the construction section, or a route that can bypass the congestion section or the construction section is always searched for. is not.

Therefore, the present invention solves the above-mentioned problems, and is a vehicle in which a guide route different from the current guide route can be easily searched for even while traveling on a preset guide route. An object of the present invention is to provide a navigation device.

[0007]

To this end, a vehicle navigation device of the present invention is a vehicle navigation device that automatically guides a route according to a preset route, and currently measures the current position of the host vehicle. A position detection device, an information storage device that stores map information and route information, and a destination and a waypoint are input, and a route search from the current position detected by the current position detection device to the destination and the waypoint is performed. An input device for instructing the execution of the route, an informing means for outputting information for route guidance, and a route search for performing a route search from the current position to the destination or a passing point according to a route search instruction of the input means. Means, and route storing means for temporarily storing the route searched by the route searching means,
A route guidance control unit that outputs a signal for performing route guidance to the notification unit based on the route, and the current position of the host vehicle detected by the current position detection device are on the route stored in the route storage unit. A central processing unit having a route travel determination means for determining whether or not, the route search means, when the own vehicle is determined to be traveling on the route by the route travel determination means, When an instruction to execute a route search is given from the input device, a route different from the route currently being guided stored in the route storage means is searched.

[0008]

In the vehicle navigation device of the present invention, the current position detecting device for measuring the current position of the host vehicle,
An information storage device that stores map information and route information and a destination and a passing point are input, and an instruction to execute a route search from the current position detected by the current position detecting device to the destination and the passing point is given. An input device to perform, a notification means for outputting information for route guidance, a route search means for performing a route search from the current position to the destination or a passing point according to a route search instruction of the input means, and the route. Route storage means for temporarily storing the route searched by the search means, route guidance control means for outputting a signal for guiding the route to the notification means based on the route, and the current position detection device A central processing unit having a route traveling determination means for determining whether or not the current position of the own vehicle is on the route stored in the route storage means, When it is determined by the means that the host vehicle is traveling on the route, when the instruction to execute the route search is given by the input device, it is different from the route currently being guided stored in the route storage means. It is characterized by searching a route, and it is possible to search for another guide route on the guide route that is currently running according to the driver's request, so it is possible to set a guide route according to the driving situation. Become. For example, if you do not want to travel on the guide route due to traffic jams due to an accident, construction, etc. in the middle of the guide route, you can easily search for a guide route different from the current guide route. Accordingly, it is possible to guide the route that matches the driver's preference.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. The vehicle navigation device according to the present invention is shown in FIG.
As shown in, an input / output device 1 for inputting / outputting information about route guidance, a current position detecting device 2 for detecting information about the current position of the vehicle, navigation data necessary for route calculation, and a display necessary for guidance. An information storage device 3 in which guidance data and the like are recorded, and a central processing unit 4 for performing route search processing and display guidance processing necessary for route guidance and controlling the entire system.

The input / output device 1 instructs the central processing unit 4 to perform navigation processing according to the driver's intention so that the driver can input the destination or output the guidance information by voice and / or screen when the driver needs it. In addition, it has a function of printing out processed data and data of data communication. As a means for realizing that function, the input unit inputs a point by a telephone number or coordinates in order to set a point such as a destination or a passing point,
A touch switch 11 for requesting route guidance and mode switching, and the output unit displays the input data on the screen and the display 12 for automatically displaying the route guidance on the screen in response to the driver's request. A printer 13 for printing out data processed by the central processing unit 4 and data stored in the information storage device 3, a speaker 16 for outputting route guidance by voice, and the like are provided.

The display 12 is composed of a color CRT or a color liquid crystal display and is necessary for navigation such as a route setting screen based on map data or guidance data processed by the central processing unit 4, a section map screen, an intersection map screen, etc. In addition to outputting all screens in color display, buttons for setting route guidance, guidance during route guidance, and screen switching operations are displayed on this screen. In particular, passing intersection information such as the name of a passing intersection is displayed in a pop-up color on the section map screen at any time.

The display 12 is provided in the instrument panel near the driver's seat, and the driver can confirm the current position of the vehicle by looking at the section map and obtain information on the route from now on. it can. Further, the display 12 is provided with a touch panel 11 corresponding to the display of the function buttons, and the above operation is executed based on a signal input by touching the buttons, and some keys are provided around the screen. A switch is provided so that mode switching such as guidance and destination setting can be performed by pressing a key. The input signal generating means including the key switch and the touch panel constitutes an input unit.

The present position detecting device 2 is a data transmitting / receiving device 2 for receiving a GPS receiving device 21 using a satellite navigation system (GPS), a beacon receiving device 22, for example, a GPS correction signal using a cellular phone or FM multiplex signal.
3. Absolute direction sensor 2 composed of geomagnetic sensor etc.
4, a relative direction sensor 25 including a wheel sensor, a steering sensor, a gyro, and the like, a distance sensor 26 that detects a traveling distance from the number of rotations of the wheel, and the like.

The information storage device 3 stores map data, intersection data, node data, road data, photo data, destination data, guidance point data, detailed destination data, road name data, branch point data, which are necessary for route guidance. It is a database in which all data such as address data, display guidance data, voice guidance data, etc. are recorded, and is composed of an optically readable recording medium such as a CD-ROM.

The central processing unit 4 is a C for executing arithmetic processing.
The PU 40, a program for performing processing such as route search, a display output control required for route guidance, a program for performing voice output control required for voice guidance, and a first ROM 41 storing data necessary for the program, are searched. RAM4 for temporarily storing route guidance information and data being processed
2. Second ROM 43 storing display information data necessary for route guidance and map display, image memory 44 storing image data used for screen display on display, CP
The image memory 4 based on the display output control signal from U40.
4, the image processor 45 that takes out image data from the image data, processes the image data, and outputs the image data to the display. A voice, a phrase, a sentence, a sound, etc. read from the information storage device 3 based on a voice output control signal from the CPU. A voice processor 46 for synthesizing and converting into an analog signal and outputting to the speaker 16, a communication interface 47 for exchanging input / output data by communication, and a sensor input interface 48 for taking in a sensor signal of the current position detecting device 2, It is provided with a clock 49 for entering the date and time in the diagnostic information. Here, the route guidance is configured so that the driver can select either screen display or voice output.

The data communication device 5 stores a large amount of route guidance information and transmits / receives data to / from an external information center such as VICS communication or ATIS communication provided by a user's request, or the user previously prepares an electronic notebook or IC card. Destination information and individual information are stored in an information storage medium (digital data storage means) such as, and a data transmission / reception unit 51 that performs data transmission / reception for inputting point coordinates using this information and a point is specified. A telephone calling unit 52 for automatically making a telephone call to obtain a peripheral information and set a destination and then make a telephone contact with the destination.

FIG. 3 shows the flow of processing of the entire system. First, the present position (departure point) required for route search.
Is obtained by the current position detecting means (step S1).
Next, on the destination setting screen, the setting conditions of the destination are input through the input device to set the destination (step S
2) Carry out route search by the route search means (step S3) When the guide start key of the input device is pressed on the searched route to start route guidance, the current position detection means measures the position of the own vehicle. The current position is tracked (step S4). Next, it is detected whether or not a signal for instructing to search for another route is input through the input device (step S5). When the instruction signal for searching for another route is input, another route search processing is performed by the route search means. Executed (step S
6). If the alternative route search instruction signal has not been input, based on the signal output by the route guidance control unit based on the route that has been continuously set, the guidance unit outputs the guidance by voice and / or display (step S7). .
Further, the distance from the current position to the destination is calculated, and the arrival at the destination is determined by whether or not this distance is less than or equal to a predetermined distance (step S8). If the distance is less than or equal to the predetermined distance, the destination is reached. And the route guidance is ended. On the other hand, if the distance from the current position to the destination is not less than the predetermined distance, the process returns to step S4 to continue tracking the current position.
The detection of the input of the alternative route search instruction signal is performed by the timer interrupt processing.

The alternative route search process shown in step S6 of FIG. 3 will be described in detail below.

FIG. 4 is a diagram showing the search range in the initial search from the current position to the destination or the like by generally inputting a point such as the destination, and FIG. 5 is the route guidance initially searched shown in FIG. It is a figure which shows the range of the search of another route at the time.

When the search range in the initial search is roughly expressed, as shown in FIG. 4 (a), the road density and the like are divided in stages by local roads, main roads, main roads, etc. By connecting the map information to the upper hierarchy in block units from the current location O to the destination D side and from the destination D to the current location O respectively,
The elliptical range as shown in (b) is set as the search target. However, in the present invention, when expressed roughly in the search range in the case where a search for another route is instructed while traveling on the guide route, as shown in FIG. 5A, the current position O and the destination D are centered respectively. By connecting the map information to the upper layer in block units,
A circular range as shown in (b) is set as a search target. In FIG. 5 (b) above, it is expressed as a circle, but it is not limited to a circle, and as shown in FIG. 5 (b),
The search range at the time of searching for another route is as shown in FIG.
The search is performed with a wider range than the normal search range shown in.

In the navigation system according to the present invention, points such as a destination and a passing point are set, a route is searched, and route guidance is executed based on the route. Various data such as roads and branch points stored in the storage device in advance, width of roads, road types such as highways, national roads, prefectural roads, signal waiting time at intersections, road restrictions such as entry prohibition and one-way traffic, or roads The congestion degree and the like are stored as a cost based on various information such as data previously stored, and at the time of initial route search, a recommended route is calculated based on these costs so that the cost becomes the lowest, for example. When a search for another route is instructed by the input device while traveling on the route determined by this initial search, in the route search means,
As described above, the route different from the current route is recalculated and displayed.

FIG. 6 is an example of a screen display when another route search key is provided during route guidance. FIG. 7 is a flowchart showing a method of calculating another route different from the current route.

As shown in FIG. 6, while traveling on the initially searched route indicated by the bold line, the "alternate route" key 10 is constantly operated.
When 1 is set and the user wants to go through a different route out of the route currently being guided, by pressing the "other route" key 101, the route being guided is searched for as a route that is as difficult as possible. You can The execution key for searching the other route may be the same as the "research" key displayed when the user deviates from the route, for example.

As shown in FIG. 7, a route is determined by the initial search, and route guidance is executed based on the route. However, when the input means issues a search instruction for another route,
The route traveling determination means determines whether or not the vehicle is currently traveling on the route being guided (step S11). If it is on the route, the search condition set by the route search condition setting means is checked (step S12). This search condition is set, for example, by the user selecting a desired search condition by pressing the select key 102 on the screen shown in FIG. 14 that is displayed after pressing the “other route” key 101 in FIG. can do. When the designated search condition is “no particular designation”, the cost of road data and branch point data of the initial search route currently displayed is increased and another route search is executed (step S1).
3). That is, if an instruction to search for another route is given while traveling on the route, it is an indication that the user does not want to pass the road currently being guided, and even if the user does not set conditions, By increasing the cost of the route being guided, it is possible to search for another route that does not pass through the route currently being guided as much as possible. In this case, in the operation of increasing the cost of the route currently being guided, a fixed number may be added to the cost of the road data or the branch point data of the route currently being guided, or a fixed number may be multiplied. . Or about the route currently being guided,
The cost of the road information and the branch point information ahead of the vehicle position at the time when the alternative route search instruction is given may be set to be higher as the position is closer to the current position, and the cost may be the original cost as the position is further away from the current position. . When the search condition designated in step S12 is determined to be the "shortest time route", the latest traffic information is acquired from the traffic information acquisition means, and the re-search that reflects the traffic information is executed (step S14). ). Since the traffic information is acquired and another route is searched, information such as traffic congestion information and traffic regulation due to construction can be taken in, and the route can be searched based on the latest information. When it is determined in step S12 that the designated search condition is “easy to drive”, the cost related to ease of driving is changed and another route search is executed (step S15). When it is determined in step S11 that the vehicle is not traveling on the route currently being guided, another route search is executed at the currently set cost (step S16).

Next, as shown in step S13 of FIG.
A specific process for resetting the cost of the route currently being guided to perform another route search and outputting the different route will be described in detail below. FIG. 8 is a flowchart of a process of setting a high cost for the route currently being guided and searching and outputting another route. FIG. 9 is a flow chart of a process of setting the cost of the route currently being guided to be excluded and searching and outputting another route.

In FIG. 8, when an instruction to start another route search is given by the input means during route guidance (step S2).
1), the data used for the search is read from the storage device (step S22). Here, as the data used for another route search, map data such as all road data and branch point data may be read, or a search may be performed from the search range of the initial search as shown in FIG. 5B. When various data for performing is read, the search range may be expanded as shown in FIG. 4B and various data corresponding to the range may be read. Then, the cost of road data, branch point data, etc. of the route currently being guided is set high (step S23). Here, as a method of increasing the cost of the data, a fixed number is added to the cost of the road data or the branch point data of the route currently being guided, or the fixed number is multiplied to reset the cost. Based on the cost of the search data set in this way, a new road is searched by the route search means (step S24), and a route different from the previous time is output from the route guidance control means to the notification means, and the notification means is sent. To guide the route by voice guidance or display guidance (step S25).

When another route search is performed by excluding the route currently being guided from the search target, in FIG. 9, when an instruction to start another route search is issued by operating the input device (step S31), use The search data to be read is read (step S32). Then, the cost of road data, branch point data, etc. of the route currently being guided is set to the maximum value, and the cost is set to be excluded as a search target (step S33). Here, although it is described as not searched, what left the cost at the maximum value is, for example, there is only one road around the destination, and in order to reach the destination, the road must be passed. This is because there are cases where it must be done. When the cost of each data is set, a new road is searched (step S34), and a route different from the whole is output by the route guidance control means (step S35).

Next, for a device in which the road data is stored in the storage device in a plurality of hierarchical structures based on the road type and the like, the connection points of each layer are excluded and another route search is performed to output another route. The case will be described in detail below. Figure 1
Reference numeral 0 is a flowchart of a process for searching and outputting by excluding the connection points of each layer in the route currently being guided. Figure 11
FIG. 3 is a diagram for schematically explaining a case where a search is performed by excluding connection points of each layer in a route currently being guided.

Here, the hierarchical structure means that the map data composed of road data, branch point data, etc. is hierarchically divided according to the degree of detail, for example, based on the road type. That is, for example, all the road network data stored in the storage device is stored in the lowest layer, and a detailed map is formed. As the hierarchy becomes higher, detailed roads are deleted based on the type of road, and the highest hierarchy is, for example, only expressways. The map data of each layer divided in this way is divided into areas and stored, but considering the processing of data such as search time, it is better to keep the amount of data in each area of each layer as constant as possible and Indeed, the area is set smaller. This is because the lower the hierarchy is, the denser the road data is, and the lower the hierarchy is, the coarser the map data is. However, the structure is not particularly limited to the above hierarchical structure, and various modifications are possible. In addition, data of connection points for transition between layers and for connecting adjacent areas of the same layer are stored in the storage device. This connection point may be an intersection or a point on the road unrelated to the intersection. In this way, when the map data is provided in a hierarchical structure and the search is performed, the current location and the vicinity of the destination are searched in a lower layer where the map data is dense, and the coarser the map data is, the more intermediate the current location and the destination are. Perform a search in a certain upper layer. As a search method, for example, start the search from both the current location and the destination, and consider the direction from the current location to the destination or from the destination to the current location in the hierarchy being searched, or within a preset range. Further, in consideration of various data costs, a search is performed up to a connection point that connects to a layer higher than the layer currently being searched. Then, a search is performed from this connection point to the connection point to the next higher layer. Repeating this operation, when the connection point from the current location and the connection point from the destination side are in the same layer, a search between the connection points in that layer is performed, and
The route is determined as shown in (a). However, the search method in this hierarchical structure is not particularly limited to the above method, and various modifications can be made as long as the data corresponding to the connection points between the layers are stored.

The process in the case where an instruction for another route search is given during route guidance for the route searched as described above will be described in detail with reference to FIG. When an instruction to start another route search is given by operating the input device during route guidance (step S41), the search data to be used is read (step S42). Then, as shown in FIG. 11B, a process of excluding connection points of the route currently being guided is performed (step S43), a new route is searched (step S44), and a route different from the previous route is output. (Step S45). Here, in the step S43, the case where the connection point of the route currently being guided is excluded has been described. However, the cost related data is added to the connection point as well as the road data and the branch point data, and the connection point of the route currently being guided is added. The cost may be maximized. In addition, when excluding connection points, in addition to excluding all connection points on the route currently being traveled, only the lowest two connection points may be excluded, or the current position side is emphasized. It may be excluded.

FIG. 12 is a flow chart showing the flow of search processing when the search condition can be changed in the alternative route search, and FIG. 13 is a diagram showing change coefficients as the search condition in the alternative route search.

The search condition may be selected on the search condition setting screen as shown in FIG. 14, and the cost of the data of the road or the branch point may be changed to perform another route search. Will be described in detail.

When an initial route, that is, a point such as a destination is set and an instruction for another route search is given while guiding the route searched first, as shown in FIG. 12, the route search condition is first acquired. (Step S51). As the search condition in the route search, for example, the condition that the minimum time is used, or the condition that is set based on the ease of driving, and the road data and the intersection data stored in the system in advance without specifying these conditions are specified. The user can select and instruct them, including those based only on the cost, by inputting them on the display screen. Of course, when searching for another route, an operation is performed to increase the cost of road data and branch point data of the route currently being guided so that the route currently being guided is not passed. Then select,
A change coefficient is applied to the cost of the data of the road or the branch point based on the acquired search condition (step S52). As shown in FIG. 13, the change coefficient is the shortest time, ease of running, etc. regarding conditions such as road type, road width, right / left turn, signal, length, and vehicle speed corresponding to the cost of road data and branch point data. The coefficients are stored in correspondence with the search condition of. At the time of searching, the cost is changed by multiplying the cost of the road or the branch point by these coefficients. For example, when the shortest time is selected as the search condition, the coefficient for turning left or right or doubling the signal is doubled, so that a route that turns right or left or a route with many signals is hard to appear. Further, for example, when the ease of running is set as a condition, the coefficient of the road type or the road width is set to 2
By doubling it, it will be difficult to find routes that go through detailed roads or narrow roads. If no particular condition is specified, all the coefficients are set to 1 so that the cost of the route currently being guided and the costs of other roads and branch points stored in the data are not changed. The route search is executed based on the coefficient thus determined (step S53).
In the above embodiment, the user is allowed to select and instruct the search condition, but the desired search condition may be stored in the above-mentioned IC card, for example. By processing in this way, it is possible to search for another route according to the user's preference.

In the above embodiment, when the search condition is specified at the time of another route search, the cost of the route currently being guided is set high, and then the change coefficient is multiplied according to the search condition to change the cost setting. However, the cost of the route currently being guided may be increased after the change coefficient is multiplied. Further, it is also possible to search for another route only by multiplying the change coefficient by the instruction of the search condition without particularly increasing the cost of the route currently being guided. In this way, it is not necessary to avoid the vicinity of the front of the current position of the vehicle, but it is possible to meet the desire to change the course depending on the user's preference.

Further, in the above embodiment, the search condition can be designated at the time of another route search, but this search condition can also be designated at the initial search. In this case, the change coefficient of each search condition may be changed between the initial search and the search for another route.

Further, in the above embodiment, a point such as a destination is first input to perform an initial search, and another route is searched when the user desires while traveling on the route. However, a means for executing another route search by changing the "other route" key while driving on the route searched for another route may be provided to repeatedly output another route. With this configuration, another route can be selected according to the user's preference.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an invention described in claims.

FIG. 2 is a diagram showing one embodiment of the overall configuration of a vehicle navigation device according to the present invention.

FIG. 3 is a diagram showing a flow of processing of the entire system.

FIG. 4 is a diagram showing a search range in an initial search from a current position to a destination or the like by generally inputting a point such as a destination or the like.

FIG. 5 is a diagram showing a search range of another route at the time of route guidance initially searched for shown in FIG. 4;

FIG. 6 is a diagram showing an example of a screen display when another route search key is provided during route guidance.

FIG. 7 is a flowchart showing a method of calculating another route different from the current route.

FIG. 8 is a flowchart of a process of setting a high cost for a route currently being guided and searching and outputting another route.

FIG. 9 is a flowchart of a process of setting a cost of a route currently being guided to be excluded and searching and outputting another route.

FIG. 10 is a flowchart of a process of searching and outputting by excluding connection points of each layer in a route currently being guided.

FIG. 11 is a diagram for schematically explaining a case where a search is performed by excluding connection points of respective layers in a route currently being guided.

FIG. 12 is a flowchart showing the flow of a search process when the search condition can be changed in the alternative route search.

FIG. 13 is a diagram showing a change coefficient as a search condition in another route search.

FIG. 14 is a diagram showing a search condition setting screen.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Input / output device, 2 ... Present position detection device, 3 ... Information storage device, 4 ... Central processing unit, 11 ... Touch switch, 12
... display, 13 ... printer, 16 ... speaker, 2
1 ... GPS receiver, 22 ... Beacon receiver, 23 ...
Data transmitting / receiving device, 40 ... CPU, 41 ... First ROM,
42 ... RAM, 43 ... Second ROM, 44 ... Image memory,
45 ... Image processor, 46 ... Audio processor, 47 ...
Communication interface, 48 ... Sensor input interface, 49 ... Clock

Claims (1)

[Claims] 1. A vehicle navigation device for automatically guiding a route according to a preset route, a current position detecting device for measuring a current position of the own vehicle, and an information storage device storing map information and route information. , An input device for inputting a destination or a passing point, and an instruction for executing a route search from the current position detected by the current position detecting device to the destination or the passing point, and information for route guidance. An informing means for outputting, a route search means for performing a route search from the current position to the destination or a passing point according to a route search instruction of the input means, and a route which is searched by the route search means is temporarily stored. Route storage means, and route guidance control means for outputting a signal for performing route guidance based on the route to the notification means,
A central processing unit having a route traveling determination means for determining whether or not the current position of the vehicle detected by the current position detection device is on the route stored in the route storage means; The search means, when it is determined by the route travel determination means that the vehicle is traveling on a route, when there is an instruction to execute a route search by the input device,
A vehicular navigation device that searches for a route different from the route currently being guided stored in the route storage means.