JPH04251284A - Map selection display device used for on-vehicle navigation device - Google Patents

Abstract

PURPOSE:To speedily find a destination by selecting the map of an area corresponding to an area code with a map selecting means and displaying it, and then inputting the telephone number of the destination to be visited by a driver and displaying the map on a screen. CONSTITUTION:The on-vehicle navigation device equipped with a road map data storage means A, a vehicle position detecting means B, and a display control means C is provided with a number input means D for inputting the number of the map to be displayed and the map selecting means E which selects and supplies map data corresponding to the number inputted by the number input means D to the display control means C. The number is the area of a trunk exchange number corresponding to the map. Therefore, the map of the area corresponding to the trunk exchange number inputted by the number input means D can be selected by the map selecting means E and displayed.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is an in-vehicle navigation system that displays the current position of a vehicle based on vehicle position information detected by itself, together with a map of the surrounding area of the vehicle, and thereby supports driving of the vehicle. The present invention relates to a map selection and display device that can quickly select and display maps.

0002

2. Description of the Related Art Conventionally, in-vehicle navigation devices have been provided that convey vehicle position information and route guidance information to a driver. This system is equipped with a geomagnetic sensor, a azimuth sensor such as a gyro, a distance sensor that measures travel distance, a map memory, and a display.It determines the current position of the vehicle and superimposes that position and the vector of the direction of travel on a map. and display it on the display.

[0003] The driver can grasp where the vehicle is on the map and in which direction it is moving while looking at the display. By the way, conventionally,
The map memory stores, for example, segmented map data that divides the entire country of Japan into a predetermined number of sections, and the driver can call up and display a desired segmented map by operating a predetermined key.

[0004] Therefore, when a driver wants to set a destination or see where the destination is on a map, he or she enters the number corresponding to the desired map using key operations. A sectional map can be displayed.

[0005]

[Problem to be Solved by the Invention] However, it takes time and effort to search for a number etc. that corresponds to a map that includes a destination, and it is especially dangerous if done while the vehicle is in motion because it prevents the driver from focusing on driving. There is. On the other hand, when a driver heads for a destination, he or she often knows the telephone number of the destination at the destination.

Accordingly, the present invention provides road map data storage means for storing road maps in sections, vehicle position detection means for detecting vehicle positions, and vehicle position information based on vehicle position information from the vehicle position detection means. In the in-vehicle navigation device, the in-vehicle navigation device is equipped with a display control means for displaying the current position of the vehicle along with a map of the surrounding area of the vehicle stored in the road map data storage means, without the driver having to search for the corresponding map from the map memory or the road atlas. An object of the present invention is to provide a map selection and display device that can immediately obtain and display a desired map.

[0007]

[Means for Solving the Problems] A map selection display device of the present invention for achieving the above object, as shown in FIG.
An in-vehicle navigation device comprising a road map data storage means A, a vehicle position detection means B, and a display control means C, a number input means D for inputting the number of the map to be displayed, and a number input means D for inputting the number of the map to be displayed; Map selection means E that selects map data and supplies it to the display control means C
The above number is the area code of the area corresponding to the map.

[0008]

[Operation] According to the map selection and display device configured as described above, the map of the area corresponding to the area code inputted by the number inputting means D can be selected and displayed by the map selection means E.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples will be explained in detail below with reference to the accompanying drawings showing examples. FIG. 2 is a block diagram showing a schematic configuration of an in-vehicle navigation device incorporating a map selection display device. A wheel speed sensor 7 (this sensor is used as a travel distance sensor and a speed sensor) and a geomagnetic sensor 6 are connected to the navigation device to detect the rotational speed of both left and right wheels. In addition, gyros (optical fiber gyros that read the turning angular velocity as a phase change of interference light, vibrating gyros that detect the turning angular velocity using cantilever vibration technology of piezoelectric elements, mechanical gyros, etc.) were selected. Various sensors such as (used as a turning angular velocity sensor) may be connected.

The navigation device further includes a locator device 1 that determines the current position of the vehicle based on output data detected by the geomagnetic sensor 6 and the wheel speed sensor 7, and a locator device 1 that stores road map data attached to the locator device 1. The current road map database 8 and the current location of the vehicle are
It has an output controller (built in the locator device 1) that obtains display data to be displayed on the liquid crystal display 3 together with the map around the vehicle stored in the road map database 8 and controls the display of the liquid crystal display 3. .

[0011] This output controller is capable of starting and stopping the in-vehicle navigation device, moving the cursor on the screen, setting initial data such as destination points, scrolling the road map displayed on the screen, and inputting the map number. A keyboard input board 2 for performing operations such as the above is connected. This keyboard input board 2 functions as a "number input means". The navigation device also includes a beacon receiver 5, a GP
It also includes an S receiver 4. These beacon receivers 5,
The output data of the GPS receiver 4 is used to correct the detected position and improve the position accuracy.

More specifically, the locator device 1 obtains the rotational speed of the wheel by counting the number of output pulse signals from the wheel speed sensor 7 with a counter, and calculates the number of rotations of the wheel with respect to the count output data output from the counter. Then, by multiplying by a predetermined constant indicating the distance per count using a multiplier, the mileage output data per unit time is calculated, and the vehicle direction data is taken in from the geomagnetic sensor 6 to obtain the estimated position of the vehicle. , beacon receiver 5,
This estimated position is corrected using the information received by the GPS receiver 4. Therefore, the locator device 1 functions as a "position detecting means".

The road map database 8 is composed of semiconductor memories, cassette tapes, CD-ROMs, DATs, etc., and includes road maps (national expressways, expressways, exclusive roads, general national roads, major local roads, general prefectural roads, designated cities). (including general city roads, other community roads, railways, rivers, famous facilities, contour lines, etc.) is divided into meshes, and each mesh is stored as road map data consisting of a combination of nodes and links. It is something that exists. Here, each mesh has a hierarchical structure, and the largest mesh almost matches the area corresponding to the area code.

Furthermore, when the output controller reads the area code input from the keyboard input board 2, it specifies the coordinates of the map mesh based on the correspondence table exemplified in the table below.
It has a function of reading out corresponding map data from the road map database 8 and displaying it on the liquid crystal display 3.

[0015]

[Table 1]

[0016] Therefore, in this case, the output controller functions as a "map selection means". With the configuration described above, when the driver inputs the city code of the destination from the keyboard input board 2, the output controller
The corresponding map data can be found based on a correspondence table and displayed on the liquid crystal display 3.

[0017] Therefore, the driver can immediately obtain the desired map on the screen without having to search for the corresponding map from a road atlas, etc., and can quickly grasp the location of the destination. , can keep driving safe. Although the present invention has been described above based on Examples, the present invention is not limited to the above Examples. For example, in the embodiment, the keyboard input board 2 was used as a number input means, but
A telephone installed in a car may also be used. Also,
The navigation device includes a memory that stores road map data, compares the travel trajectory of the vehicle, evaluates the degree of correlation with the road map data, corrects the estimated position of the vehicle, and sets the current position of the vehicle on the road. Map matching method (Unexamined Japanese Patent Publication No. 6
3-148115, JP-A-64-53112) may be adopted. Various other design changes can be made without changing the gist of the present invention.

[0018]

[Effects of the Invention] As described above, according to the in-vehicle navigation device of the present invention, the map of the area corresponding to the area code input by the number input means can be selected and displayed by the map selection means. This has the unique effect of allowing drivers to quickly search for their destination by inputting the phone number of their destination and displaying a map on the screen.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram showing the configuration of the present invention.

FIG. 2 is a block diagram showing the configuration of an in-vehicle navigation device installed in a vehicle.

[Explanation of symbols]

1 Locator device 2 Key input board 3. Liquid crystal display 6 Geomagnetic sensor 7 Wheel speed sensor 8 Road map database

Claims (1)

[Claims] Claim 1: Road map data storage means (A) for storing road maps in sections; vehicle position detection means (B) for detecting vehicle positions; and vehicle position from the vehicle position detection means (B). In an in-vehicle navigation device comprising: a road map data storage means (A) that displays the current position of the vehicle based on the information along with a map of the surrounding area of the vehicle stored in the vehicle navigation means (C), the number of the map to be displayed is input. number input means (D) and number input means (D)
map selection means (E) which selects map data according to the number inputted by and supplies it to the display control means (C); A map selection display device for use in an in-vehicle navigation device.