JP2003315077A - Onboard navigation apparatus and method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an onboard navigation apparatus by which optimum route guidance fitting schedule data of a vehicle can be performed by causing the apparatus to perform a route search, taking information on traffic congestion of routes into consideration. <P>SOLUTION: When a route up to a destination is searched on the basis of the schedule data obtained by a schedule data obtaining means 26, a route which enables arrival to the destination in the shortest period of time is selected on the basis of information on past traffic congestion stored in a traffic congestion information storage means 11. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted navigation device that calculates a current position of a traveling vehicle and displays a route to a destination on a screen, and particularly enables optimum route search based on schedule data. The present invention relates to a vehicle-mounted navigation device and a vehicle-mounted navigation method.

[0002]

2. Description of the Related Art Conventionally, a vehicle-mounted navigation system that searches a current position of a vehicle traveling on a road and a route from the current position to a destination and displays it on a screen, and also displays an estimated time of arrival at the destination. A device has been proposed. For example, JP-A-8-22595 and JP-A-10-2
No. 21102 discloses a technique for route search using schedule data, and Japanese Patent Laid-Open No. 2000-146617 discloses a technique for inputting a schedule memo, an address book and the like to a mobile terminal device such as a PDA and using this data in a navigation device. Are disclosed respectively.

[0003]

Since the conventional navigation device is constructed as described above, the data used for route search are the distance to the destination, the type of road, etc.
Since the estimated arrival time displayed after the search does not include the important element of traffic congestion, there was a problem that it was difficult to search the route according to the schedule.

The present invention has been made in order to solve the above-mentioned conventional problems, and makes it possible to provide optimum route guidance in accordance with vehicle schedule data by performing route search in consideration of traffic congestion information. An object of the present invention is to provide a vehicle-mounted navigation device and a vehicle-mounted navigation method.

[0005]

A vehicle-mounted navigation device according to the present invention includes schedule data storage means for storing vehicle movement schedule data, and schedule data acquisition means for obtaining schedule data from the schedule data storage means. The route search device is provided with a traffic congestion information storage unit that stores the acquired traffic congestion information.
When searching for a route to a destination based on the schedule data acquired by the schedule data acquisition unit, a route that can reach the destination in the shortest time is selected based on the past traffic congestion information stored in the traffic congestion information storage unit. To do.

The schedule data of the vehicle-mounted navigation device according to the present invention includes the destination and the scheduled time of arrival at the destination.

The congestion information storage means of the vehicle-mounted navigation device according to the present invention stores the time zone, date and day of the week for each route as a database, and the route search means the time zone, date and day of the week in the database. The most relevant information from the relevance of is used.

The route searching means of the vehicle-mounted navigation device according to the present invention is to select the route which can reach the destination in the shortest time, taking into account the latest traffic congestion information acquired by the traffic congestion information acquiring means.

The on-vehicle navigation method according to the present invention acquires schedule data from the schedule data storage means, sets a destination based on the acquired schedule data, and searches for a route to the destination set by the route search means. Going to get the shortest route to the destination, determine whether there is traffic congestion based on the traffic information received and accumulated in the past, and if there is traffic information, bypass the route The route is searched, the detour is compared with the required time on the searched route, and the route having the shortest required time is selected.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below. Embodiment 1. 1 is a block diagram of a vehicle-mounted navigation device according to Embodiment 1 of the present invention. In the figure, reference numeral 1 denotes a navigation processing unit (route searching means), a CPU (vehicle position detecting means) 10, a processing of various programs, and a RAM in which congestion information is stored.
(Congestion information storage means) 11, various programs such as navigation programs, and R in which congestion information is stored
The OM 12, the date, the day of the week, and the clock 13 for recognizing the time are provided.

In addition, the navigation processing unit 1 has a GP
S receiver 20, gyro sensor 21, vehicle speed sensor 2
2, VICS receiving device 23, display device 24, input device 2
5, a communication device (schedule data acquisition means) 26, a voice output device 27, and a map data reading device (map information storage means) 28 are connected. Reference numeral 29 denotes a portable information device (schedule data storage means) such as a PDA, which stores schedule data described later.

The GPS receiver 20 detects the position of the vehicle, the gyro sensor 21 detects that the direction of the vehicle has changed, and the vehicle speed sensor 22 detects the speed and movement amount of the vehicle. At 1, the position of the vehicle is detected. The VICS receiving device 23 receives traffic information and other road traffic information transmitted by radio. The display device 24 displays a map around the vehicle and a guide route, and the input device 25 performs destination setting and various input operations. The communication device 26 is a portable information device 2 such as a PDA.
The navigation processing unit 1 is connected to the schedule information stored in the portable information device 29. The voice output device 27 outputs the route guidance by voice. The map data reading device 28 reads map data and guidance information data from a recording medium such as a DVD-ROM or an HDD (not shown).

Next, the operation will be described. FIG. 2 is a flowchart showing the operation of the navigation device. The CPU 10 of the navigation processing unit 1 sets the navigation device in the route search processing state (step ST1). Next, the PDA connected to the communication device 26
The schedule data is acquired from the portable information device 29 such as (step ST2). An example of this schedule data is shown in FIG. 3, and data numbers (No.) 1, 2
The estimated time of arrival and the destination are shown for each of 3 and 3.

At step ST3, a destination is set based on the schedule data acquired at step ST2.
In this example, the destination of the data number, Company A, is set as the first destination. Then, a route search to the set first destination (company A) is performed (step ST4). As shown in FIG. 5, in this route search, the route with the shortest distance from the departure point to the company A, that is, the route of departure point-point A-company B is acquired.

The navigation processing unit 1 determines whether or not the current traffic congestion information received by the VICS receiving device 23 and the traffic congestion information received in the past and accumulated in the RAM 11 are present in the route searched in step ST4 ( Step ST
5). Note that FIG. 4 is an example of this accumulated traffic jam information, and each route (section between points ABC) existing from the departure point to the destination (company A, company B, company C) shown in FIG. Regarding the traffic congestion, the time zone, date, day of the week, and remarks (congestion factors, etc.) are stored in the RAM 11 as a database.

At this time, in the past traffic jam information, the time zone,
Use the most relevant information from dates, days of the week, etc. For example, the section A-B is from 15:00 to 17:00.
If you plan to pass at 0:00, use the traffic jam information for the time zone of number (No.) 1, or set the section for BA to 1
If it is scheduled to pass on the 26th of the month, the traffic jam information of the number 3 date will be used. Since the number 2 traffic jam is caused by an accident, it is not used as traffic jam information.

If it is determined in step ST5 that there is no congestion information on the route, the process proceeds to step ST8 to calculate the time and departure time required to reach the destination (company A) via point A. If traffic congestion information is present in the searched route, a route that bypasses the route is searched (step ST6). The detour is compared with the required time on the shortest route searched in step ST4, and the route with the shortest required time is selected (step ST7). In this case, when there are a plurality of detours, the route with the shortest distance is compared with all the detours, and the route with the shortest time is selected from among them.
In step ST8, the time required to reach the destination and the departure time are calculated based on the route searched as described above.

The route search process of steps ST1 to ST8 is performed for all schedule data (data numbers 2 and 3 in FIG. 3). In this case, the starting point of data number 2 is the destination of data number 1 (company A),
The starting point of data number 3 is the destination of data number 2 (Ro company), and the route that can sequentially visit the destinations based on the schedule data is selected.

[0019]

According to the present invention, the route with the shortest distance to the destination is searched, and it is determined whether or not there is a traffic jam on the searched route based on the traffic jam information stored in the traffic jam information storage means. , If there is congestion information on this route, search for a route that bypasses that route, compare the time required for the detour with the route with the shortest distance, and select the route with the shortest required time. By doing so, it is possible to select a route that can reach the destination in the shortest time in consideration of the traffic congestion, and thus it is possible to search for an optimal route that matches the schedule.

According to the present invention, since the schedule data includes the destination and the scheduled time of arrival at the destination, there is an effect that it is possible to carry out a route search according to the destination and the scheduled arrival time.

According to the present invention, the time zone, the date, and the day of the week in which traffic is congested for each route are accumulated as a database, and the most relevant information is used from the relation of the time zone, the date, the day of the week, etc. There is an effect that it is possible to take in the traffic jam information and to search for a highly accurate route in consideration of the traffic jam.

According to the present invention, the route that can reach the destination in the shortest time is selected in consideration of the latest traffic congestion information acquired by the traffic congestion information acquisition means, so that the route can be searched in consideration of the latest traffic congestion information. There is an effect.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a vehicle-mounted navigation device of the present invention.

FIG. 2 is a flowchart showing the operation of the vehicle-mounted navigation device of the present invention.

FIG. 3 is a diagram showing an example of schedule data.

FIG. 4 is a diagram showing an example of a database of traffic jam information.

FIG. 5 is a diagram showing an example of a route from a departure point to a destination.

[Explanation of symbols]

1 navigation processing unit, 10 CPU, 11 RA
M, 12 ROM, 13 clock, 20 GPS receiver, 21 gyro sensor, 22 vehicle speed sensor, 23
VICS receiver, 24 display, 25 input device,
26 communication device, 27 audio output device, 28 map data reading device, 29 portable information device.

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Claims (5)

[Claims] 1. A route search means for inputting map information from a map information storage means and vehicle position information from a vehicle position detection means is provided, and an optimum route from a departure place to a destination is searched by this route search means. In the in-vehicle navigation device, a schedule data storage unit that stores schedule data for vehicle movement, a schedule data acquisition unit that acquires schedule data from the schedule data storage unit, and a congestion information storage unit that stores the acquired congestion information. The route search means, when searching for a route to a destination based on the schedule data acquired by the schedule data acquisition means, is the shortest based on the past traffic congestion information accumulated in the traffic congestion information storage means. In-vehicle navigation system characterized by selecting a route that can reach the destination in time Down apparatus. 2. The on-vehicle navigation device according to claim 1, wherein the schedule data includes a destination and a scheduled time of arrival at the destination. 3. The congestion information accumulating means accumulates a time zone, a date, and a day of the week for each route as a database, and the route searching means is most relevant from the relevance of the time zone, the date, the day of the week, etc. in the database. The in-vehicle navigation device according to claim 1, wherein the deep information of the vehicle is used. 4. The vehicle-mounted navigation according to claim 1, wherein the route search means selects a route that can reach the destination in the shortest time, taking into account the latest traffic congestion information acquired by the traffic congestion information acquisition means. apparatus. 5. The shortest distance to the destination by acquiring schedule data from the schedule data storage means, setting a destination based on the acquired schedule data, and performing a route search to the destination set by the route search means. It acquires a distance route, determines whether there is a traffic jam based on the traffic jam information received and accumulated in the past, and if there is traffic jam information, searches for a route that bypasses that path, and detours the route. And a required time on the searched route are compared with each other, and a route having the shortest required time is selected.