JPH0933274A - Navigation apparatus for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To guide a vehicle through the optimal route to the destination in consideration of the road state obtained from the outside with the facilities selected during traveling as passing points. SOLUTION: A means, which retrieves the facilities around a facility- retrieving base point such as the present position in correspondence with the inputted utilization purpose, a means, which searches the optimal route reaching the destination through the retrieved facility, and a facility-determining means, which determines the destination facility compatible with the selecting conditions based on facilities G1, G2 and the like are provided. A time t1 from the present position to the facility G1 and a time t2 to the facility G2 and a time T1 from the facility G1 to the destination and a time T2 from the facility G2 to the destination are obtained, and the destination facility is determined from the time t1+T1 to the destination through the facility G1 and the time t2+T2 to the destination through the facility G2. Therefore, even if a dropping-in is made on the halfway, the route guidance is performed with the route having the shortest time as the optimal route. Therefore, the user can reach the facility in the shorter time from the present position to the destination without the selection by the user himself or herself.

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 for guiding a route to a destination, and particularly when a user wants to stop at a facility such as a gas station or a convenience store, the facility around the current position is input by inputting the purpose of use. The present invention relates to a vehicular navigation device that enables a search for a candidate and an optimum route search through a searched facility in consideration of road conditions such as congestion information acquired from the outside.

[0002]

2. Description of the Related Art A vehicle navigation system has a function of calculating a route from a current position to a destination by using external information and determining an optimum route from a plurality of calculated routes. Something to have is proposed. While traveling by route guidance using this vehicle navigation device, a facility such as a shop may be searched for refueling or buying food or drink. In such a case,
It is necessary to search by purpose of use with the search function. As a result of the search, the facility may not be on the route or may be off the guide route. When detouring to a facility deviating from the guide route, the facility is re-searched with the facility as a transit point. An example of a vehicle navigation device having this type of function is Japanese Patent Laid-Open No. 2-38.
It is proposed in Japanese Patent Publication No. 99. For example, when a user wants to stop at a gas station, the user must select from a plurality of gas stations and set it as a destination. If you set it as a passing point, the user will not be able to obtain dynamic information (congestion, etc.) on the road even if he / she thinks it is the most suitable, so even if you can run smoothly from the current position to the gas station, If there is traffic on the route from the stand to the destination, you will not be able to drive smoothly. Also, when I eat at a restaurant, when I go to the restaurant I searched for, it may be closed or out of business hours, so I may search again. Sometimes, you may spend unexpected time at the restaurant. As described above, unless the business information of the facility to be visited is taken into consideration, there is a problem that the scheduled arrival time at the destination is significantly delayed. An object of the present invention is to provide a vehicular navigation device capable of guiding an optimum route to a destination in consideration of road conditions acquired from the outside, using a destination facility selected for stopping during traveling as a transit point. Especially. Another purpose is to consider the road condition acquired from the outside, using the destination facility selected to stop in the middle of traveling as a passing point,
Another object of the present invention is to provide a vehicular navigation device that can provide guidance to a destination by taking an optimal route into consideration information about the destination facility.

[0003]

In order to achieve the above object, a vehicle navigation apparatus according to the present invention of claim 1 is a destination setting means for setting a destination and a utilization purpose input means for inputting a utilization purpose. A first storage means for storing map information and guidance information, a second storage means for receiving and storing road conditions such as road congestion as external information, and a current position detecting means for detecting the position of the vehicle. A facility search means for searching facilities around the facility search base point based on the purpose of use input by the purpose of use input means, and an external unit stored in the second storage means for the facility searched by the facility search means For the facility searched by the facility search means and the first correlation amount calculation means for searching the route from the current position to the facility in consideration of the information and obtaining the correlation amount by the route,
Second correlation amount calculation means for searching a route from the facility to the destination in consideration of the external information stored in the second storage means, and obtaining a correlation amount by the route, and first and second correlation amounts The facility determination means determines the facility based on the calculated value of the correlation amount obtained by the calculation means. The vehicular navigation device according to the invention of claim 2 further includes a destination setting means for setting a destination, a usage purpose input means for inputting a usage purpose, and a first storage means for storing map information and guidance information. Second storage means for receiving and storing road conditions such as road congestion as external information, third storage means for storing information about the target facility, current position detection means for detecting the position of the vehicle, and purpose of use The facility search means for searching the facility around the facility search base point based on the purpose of use input by the input means, and the external information stored in the second storage means for the facility searched by the facility search means First correlation amount calculating means for searching a route from the current position to the facility by using the information about the target facility stored in the third storage means as a determination condition, and obtaining the correlation amount by the route. For the facility searched by the facility search means, the external information stored in the second storage means is taken into consideration, and the information about the target facility stored in the third storage means is used as a judgment condition to change from the facility to the destination. Facility for determining a facility based on the second correlation amount calculating means for searching the route up to and obtaining the correlation amount by the route and the calculated value of the correlation amount obtained by the first and second correlation amount calculating means Means and means. The invention according to claim 3 is the invention according to claim 1 or 2, further comprising search condition input means for inputting a search condition including a facility search base point, wherein the facility search means is based on the search condition input from the search condition input means. It is configured to search for facilities. According to the above configuration, when the user wants to stop at a facility such as a gas station or a convenience store while traveling, if the user inputs the purpose of use using the purpose-of-use input means, the facility search means will use the purpose of use based on pre-stored guide information. In addition to searching the facilities according to the above, the first and second correlation amount calculating means consider the road conditions such as traffic congestion information acquired from the outside, or add the information about the target facilities to the road conditions to determine the facilities. As a transit point, the correlation amount from the current position to the facility and the correlation amount from the facility to the destination are calculated. continue,
The facility determining means determines an optimal facility to stop by from the calculated value of the calculated correlation amount. When the search condition input means is provided, the present position, the destination, etc. can be set as the facility search base point, and the required time can be set, so that the optimum route search can be performed.

[0004]

According to the present invention, even if the user wants to detour while traveling, route guidance is performed with the route with the shortest required time as the optimal route, so that the user can select from the current position to the destination without selecting the route himself. You can reach the facility in a shorter time.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a system configuration of the navigation device. In FIG. 2, the navigation device is an input / output device 1 for inputting / outputting information about route guidance,
A current position detection device 2 for detecting information about the current position of the vehicle, an information storage device 3 in which navigation data necessary for route calculation and guidance data necessary for route guidance are recorded, route search processing and route guidance. It comprises an electronic control unit 4 for executing display / voice guidance processing necessary for the above and controlling the entire system.

The input / output device 1 can input information necessary for setting a destination such as a starting point, a destination and a passing point, and can output voice guidance and / or screen display of guidance information when required by a driver. In addition, it has a function of instructing the electronic control unit 4 to perform navigation processing according to the intention of the user and printing out processed data and data of data communication. As a means for realizing the function, the input unit is composed of a touch switch 11 for inputting an address, a telephone number, coordinates, etc. for setting a destination and requesting route guidance. In addition, the output unit displays the input data on the screen, the display 12 that displays the driver's request or the route guidance automatically, the data processed by the electronic control unit 4, the data stored in the information storage device 3, and the communication data. It comprises a printer 13 for printing out and a speaker 14 for outputting route guidance by voice.

The display 12 is composed of a color CRT and a color liquid crystal display, and the electronic control unit 4
All the screens necessary for navigation such as the destination setting screen, section map screen, intersection map screen, etc., which are based on the map data and guidance data processed by the system, are output in color display, and route guidance settings and guidance during route guidance are also displayed on this screen. And keys for switching screens are displayed. Also,
The display 12 is provided with a touch switch 11 corresponding to the display of the function keys, and is configured to execute the above-described operation based on a signal input by key touch. The current position detecting device 2 includes a GPS receiving device 21 that uses a satellite navigation system (GPS), a beacon receiving device 22, a data transmitting / receiving device 23 that receives a GPS correction signal that uses, for example, a car phone or FM multiplex signal.
For example, an absolute direction sensor 2 composed of a geomagnetic sensor, etc.
4, a relative azimuth sensor 25 including, for example, a wheel sensor and a steering sensor, and a distance sensor 26 that detects a traveling distance from the number of rotations of a wheel, and detects a traveling azimuth and a position coordinate of the vehicle. The information storage device 3 is, for example, a map data file that stores map information, an intersection data file that stores information about intersections, road data that stores information about roads such as road types and start / end points of each road, which is necessary for route guidance. File, node data file that stores east longitude and north latitude coordinates at one point on the road, location coordinates of feature objects such as gas stations and convenience stores, etc. It is composed of a guidance point data file and the like that store information such as

The electronic control unit 4 is a CPU 40 for executing arithmetic processing, a program for performing processing such as route search, a display control required for route guidance, a program for performing voice output control required for voice guidance, and a program required for it. ROM 41 in which various data are stored, road information after road search or re-search (road sequence data), route guidance information, and RAM or a non-volatile memory as a storage means for temporarily storing data being processed. Memory 42,
The second ROM 43, which stores display data necessary for route guidance and map display, the image memory 44, which stores image data used for screen display on the display, and the image data from the image memory, which is based on a display control signal from the CPU. Image processor 45, which takes out, performs image processing, and outputs to the display, synthesizes voice data (phrase, one sentence, sound, etc.) read from information storage device 3 based on a voice output control command from CPU. Processor 4 for converting into analog signal and outputting to speaker
6, a communication interface 47 for exchanging input / output data by communication, a sensor input interface 48 for receiving a sensor signal of the current position detection device 2, and a clock 49 for writing date and time in internal diagnostic information. ing. Here, the route guidance is configured so that the driver can select either the screen display or the voice output.

The present system calculates an estimated position based on various sensor signals for current position detection and GPS data, and determines the position on the road by correlating the estimated position with the road on the map and GPS data. Find the current position. Further, the present system has a function of illuminating the current position on the route to the destination and determining whether or not the position on the lane of the own vehicle is approaching a predetermined guide point.
That is, the above function determines the predetermined distance before the intersection on the guidance route, the automatic audio output after the intersection is determined, and the timing of the intersection information display output such as the name of the passing intersection. A guidance command is issued to the image processor and the audio processor based on the result of the determination. When the request signal is input, the voice processor is instructed to provide voice guidance of the current position. In addition, the voice guidance of this system includes voice data (phrase, 1
(Sentences, sounds, etc.) are combined, converted into an analog signal, and output from the voice output unit.

Next, the function of the electronic control unit for performing an optimum route search with a passing point at a facility (route point) that stops during traveling will be described. FIG. 2 shows an example of a genre selection screen. FIG. 3 shows an example of the search condition input screen. The selection screen 5 is provided with a selection key 50 for selecting facilities classified by purpose of use and a search condition designation key 51 for designating whether or not to set search conditions for the selected facility. Select the facility genre on the selection screen,
When no search condition is specified, the search for the facility to be used is started based on a predetermined facility search base point (usually the current position). When the facility genre is selected and search conditions are specified, the search condition input screen shown in FIG. 3 opens. On the search condition input screen 6, a facility search base point designation key 6 for designating at which point when the facility to be used is searched
0, a brand designation key 61 for further narrowing down and designating the facility genres selected on the selection screen 5, and a required time designation key 6 for designating the time required to reach the facility to be used.
2 are provided. In this example, it is shown that the gas station of the brand “JOMO” around the destination, which can be reached within 30 minutes from the current position, is selected.

When you want to stop at a gas station or a convenience store while driving, select a facility on the screen, set search conditions, and search for a facility around the facility search base point, such as your current location, and go through that facility. Search for the optimal route to the destination. This route search is executed in consideration of the received road condition. The facility search data includes facility name data, position (coordinates) data, road data, for each facility classified by genre as shown in FIG.
It has brand data, sales data, etc. The business data includes business days, business start time, business end time, and busy hours. In this way, when searching for a facility that has sales data, such as a restaurant, you can exclude facilities that are outside business hours or during busy hours from the search target, or if you want to search for facilities that are in a busy time zone, select that facility. Information such as notification of the waiting time of can be provided.

As a usage pattern of the business data, the traveling time to the destination facility is obtained, and the arrival time at the destination facility is predicted from the traveling time and the current time, and the expected arrival time is compared with the sales data. -Calculate and determine the processing method for the facility based on the judgment result. That is, from the calculation result, it is determined whether the expected arrival time is in a busy time zone, it is during business hours, etc., and the facility that does not meet the conditions is deleted, or the busy time is set. In that case, the driver can be selected by notifying that effect. In particular, the sales data may be stored in advance as internal information stored in the information storage device 3 equipped in the system of the embodiment of the present invention shown in FIG. 1, or as external information.
For example, the data transmission / reception device 23 that constitutes the current position detection device 2 may obtain it by communication from an information center and store it in a non-volatile memory, for example. By adopting a configuration in which such variable information is acquired from the outside, the data is periodically rewritten and the facility search by the latest data becomes possible.

A facility within a specific range around the facility search base point is searched based on the selected genre, and a route search is performed through the searched facility in consideration of information such as road conditions and business information. Facilities that meet the search conditions are determined from among them. At that time, the correlation amount is calculated by the route from the current position to the facility and the route from the facility to the destination. The correlation amount is the value from the current position to the facility, and the time and the road from the facility to the destination. Values weighted based on physical road conditions such as type, number of lanes, number of signals, and right / left turns are used. The concept of route search using the required time as the correlation amount will be described with reference to FIG. In the following description, the current position is used as the facility search base point. When there is a facility, for all facilities, the optimum route search to the destination through the facility is performed. For example, if there is a facility G1 and a facility G2, from the current position to the facility G
The time t1 to 1 and the time t2 to the facility G2, the time T1 to the destination from the facility G1 and the time T2 to the destination from the facility G2 are calculated. A facility is selected from time t1 + T1 which goes to the destination via the facility G1 and time t2 + T2 which goes to the destination via the facility G2. Regarding the selection of this facility, the facility G1 and the facility G2 are automatically selected according to preset conditions, or the facility G1 is displayed on the map.
It is possible to adopt a configuration in which a route passing through the route and a route passing through the facility G2 are displayed and selected from them.

Next, the processing procedure of this embodiment will be described. Figure 7
Shows the main routine. FIG. 8 shows a subroutine for optimum route search. FIG. 9 shows a route search subroutine in consideration of road conditions. In FIG. 7, the current position is acquired (S1), the destination is set (S2), and information about road conditions is acquired from the outside and stored in the memory (S3). Based on these pieces of information, the optimum route search through the facility (route point) is performed (S4), and the searched route is guided and displayed (S5). The optimum route search in step S4 starts the routine (A-1) shown in FIG. Then, the genre selection screen shown in FIG. 2 is displayed, and a transit point, for example, a gas station is selected on this screen (S10). Then, the presence or absence of the search condition is designated (S11). If there are search conditions, set the search conditions such as the search location, brand, and required time on the search condition input screen. As the search conditions, the facility search base point (current position, destination), brand, required time (eg: minutes),
The time (eg, how many minutes after the current time) is prepared.
In addition, when the number of minutes after the current time is designated, the nearest facility that can arrive at the designated time (arrival time) is searched. Here, if there is no search condition, the waypoint data around the current position (data of G1 and G2 in FIG. 5) is acquired (S12), and the route search considering the road condition is executed based on the waypoint data. (S13), and as a result, the route with the shortest required time is selected (S1).
4).

When the search condition is designated in step S11, the optimum route search routine (A-2) shown in FIG. 9 is started. First, it is determined whether or not the facility search base point is set as the search condition specified in step S11 (S20), and if it is set, data around the facility search base point is acquired (S2).
1) If not set, data around the current position is acquired (S22). Subsequently, it is determined whether or not the brand has been set (S23). If there is a brand, step S
21 or the data obtained in step S22 is obtained (S24). Then, it is determined whether or not there is a determination condition of the target facility (business hours, crowded hours, etc.) (S25), and if there is no, a route search is performed in consideration of road conditions (S28). If there is a judgment condition for the destination facility, the expected arrival time at the destination facility is calculated (S26), data that meets the judgment condition is obtained from the expected arrival time and business data (S27), and a route search considering road conditions is performed. Is executed (S28). Here, it is determined whether the required time is set as the search condition (S29), and the route is selected from the result. That is, when the required time is set, the route having the required time closest to the condition is selected from the routes searched based on the required time (S30). On the other hand, if the required time is not set, the route with the shortest required time is selected (S3).
1).

In this embodiment, the route search is executed based on the acquired data in step 27, but when the judgment condition of the destination facility is the driver's selection, the judgment condition is not applied. If there is not, a step of notifying and a step of selecting whether or not to perform a route search including the data are added. For the route search considering the road condition (step S13), the subroutine shown in FIG. 10 is executed. A target facility around the current position or around the set facility search base point, for example, the number n of gas stations is preset (S40), and the shortest time calculation is performed in consideration of congestion information as the road condition from the current position to the target facility (FIG. 5). T1 and t2) are performed (S41). Further, the shortest time calculation (T1, T2 in FIG. 5) is performed in consideration of the traffic jam information from the destination facility to the destination (S42). The required time from the current position to the destination is acquired (S43). This time calculation is executed for a predetermined number n of transit points (target facilities) from around the current position (S44). In the above embodiment, the "required time" is used as the selection condition after the route search, but the arrival time at the destination facility may be selected as the condition.

The present invention can employ the following embodiments. (1) If the number of facilities is relatively large, a large number of facilities will be searched when searching in a wide range, while if the number of facilities is relatively small, searching in a narrow range may fail. Since the number of search results also changes depending on the size of the search range in this way, it is preferable to configure the search range so that it can be expanded or contracted to shorten the search time and facilitate the setting of facilities to be used. . The method of determining the search range will be described with reference to FIG. Here, the limit range can also be calculated from the case where a predetermined value is set as the initial value and the present position and the length of the destination.
Also, when the limit range is exceeded, it can be configured to switch from the current position center to the destination center, or to display a message such as "There is no target facility in the vicinity". (2) The shape of the search range can be set to any shape such as a circle, an ellipse, and a semicircle. In particular, when an ellipse or a semicircle is used, the search time can be shortened, and the facilities can be set so as not to be directed to the destination, by limiting the facilities to the destination. (3) The search method can be configured such that the range is expanded by 50 m in radius until the target facility is located as in (1) above, and the search is ended when the facility is found. (4) As another search method, it is also possible to perform a search to the limit range and find a route passing through the optimum facility from the search. (5) In order to shorten the search time, the selection conditions such as the designated facility name, the current position or the vicinity of the destination are automatically or manually set before or after the search, the number of searches, or the search time is limited. The configuration is valid. When limiting the number of searches, the search range is prioritized. For example, in the case where the number n is limited to 20, when the search range is expanded and the limit number is exceeded, the search range expansion process is stopped at that point. In particular, with the configuration in which the candidate sites are automatically selected, it is possible to reduce the burden on the user and concentrate on driving. Also, by making everything automatic, the work time can be reduced and information such as road conditions and sales information can be handled in more real time. (6) As a method of selecting a candidate location, for example, a designated gas station (designated before the search), a destination facility near the current position, a destination facility near the destination are displayed as four intermediate routes, and four routes are displayed. Select from these. In addition, it is possible to adopt a configuration in which about 10 stations are displayed starting from the one with the shortest required time, and the number is narrowed down by selecting a designated gas station, position, or the like. (7) As a method of obtaining the facility search base point shown in FIG. 3, an arbitrary point on the map can be designated and set outside the current position and destination.

[Brief description of drawings]

FIG. 1 is a hardware configuration diagram of a vehicle navigation device.

FIG. 2 is an explanatory diagram showing an example of a transit genre selection screen.

FIG. 3 is an explanatory diagram showing an example of a search condition input screen.

FIG. 4 is an explanatory diagram showing an example of facility data registered according to genres.

FIG. 5 is an explanatory diagram of an optimum route search method using a use facility as a passing point.

FIG. 6 is an explanatory diagram showing an example of how to determine a search range.

FIG. 7 is a diagram showing a main routine showing a flow of processing from route search to route guidance.

FIG. 8 is a diagram showing a subroutine (A-1) for optimal route search of the main routine.

FIG. 9 is a diagram showing a subroutine (A-2) when a search condition for the subroutine (A-1) is set.

FIG. 10 is a diagram showing a subroutine (B) for route search in consideration of road conditions of the subroutine (A-1).

[Explanation of symbols]

1 ... I / O device, 2 ... Current position detection device, 3 ... Information storage device, 4 ... Electronic control unit, 5 ... Via genre selection screen, 6 ... Search condition input screen

Claims (3)

[Claims] 1. A destination setting means for setting a destination, a usage purpose input means for inputting a usage purpose, a first storage means for storing map information and guidance information, and a road condition such as road congestion externally. A second storage unit that receives and stores the information, a current position detection unit that detects the position of the vehicle, and a facility that searches facilities around the facility search base point based on the purpose of use input by the purpose of use input unit For the search unit and the facility searched by the facility search unit, a route from the current position to the facility is searched in consideration of the external information stored in the second storage unit, and the correlation amount by the route is searched. For the facility searched by the facility searching unit, the route from the facility to the destination is taken into consideration in consideration of the external information stored in the second storage unit. Second correlation amount calculating means for searching for a correlation amount according to the route, and facility determining means for determining a facility based on the calculated values of the correlation amounts obtained by the first and second correlation amount calculating means, A vehicle navigation device comprising: 2. A destination setting means for setting a destination, a usage purpose input means for inputting a usage purpose, a first storage means for storing map information and guidance information, and a road condition such as road congestion externally. A second storage unit that receives and stores as information, a third storage unit that stores information about the target facility, a current position detection unit that detects the position of the vehicle, and a use input by the use purpose input unit. The facility search means for searching the facility around the facility search base based on the purpose and the facility searched by the facility search means
In consideration of the external information stored in the storage means, the route from the current position to the facility is searched using the information about the target facility stored in the third storage means as a determination condition, and the correlation amount by the route is calculated. The correlation amount calculating unit 1 and the facility searched by the facility searching unit
In consideration of the external information stored in the storage means, the route from the facility to the destination is searched using the information about the target facility stored in the third storage means as a judgment condition, and the correlation amount by the route is calculated. A vehicle navigation device comprising: two correlation amount calculating means; and facility determining means for determining a facility based on the calculated values of the correlation amounts obtained by the first and second correlation amount calculating means. 3. A search condition input means for inputting a search condition including a facility search base point, wherein the facility search means searches for a facility based on the search condition input from the search condition input means. Item 3. A vehicle navigation device according to item 1 or 2.