JP2568302Y2 - Navigation device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation apparatus, and in particular, when receiving a radio signal, when a car travels in an area where radio reception is obstructed, the playback audio source automatically taps from the radio. The present invention relates to a navigation device that switches to a CD or the like.

[0002]

2. Description of the Related Art Automobiles include radios, cassette decks,
An audio device composed of a CD player or the like is incorporated, and if this device is used, it is possible to enjoy music and radio broadcasting and to perform a comfortable drive while displaying the position of the car. .

In recent years, it has become possible to control the audio device main body by using an operation unit of a navigation system, and the system can be configured as a system.

[0004]

[Problem to be solved by the invention] When listening to the radio while driving, depending on the receiving point, the noise may enter or become inaudible due to the effect of obstacles such as buildings and mountains, so the radio broadcast will not be received May occur.
In this case, the audio source to be played back on a tape or a CD is switched each time, but such switching operation is very troublesome. In addition, when the switching operation as described above is performed intermittently, there is a possibility that the concentration of driving is lost and an accident may occur, which is very dangerous.

[0005]

According to the present invention, there is provided a navigation system having means for controlling a radio receiving unit and an audio device such as a cassette player and a CD player. A storage unit for storing the correspondence between the position of the vehicle and the radio reception interference area in the navigation device, and determining whether the current position of the vehicle output by the navigation matches the radio reception interference area in the storage unit. This problem is solved by providing a monitoring means and a switching means for switching to another audio performance device when a match is detected by the monitoring means during radio reception.

[0006]

The correspondence between the vehicle position and the radio reception interference area data is determined in advance by the vehicle position and the reception interference area data.
It is monitored whether the current position of the vehicle, which is stored in the storage unit and output from the navigation controller, matches the vehicle position stored in the vehicle position / reception interference area data storage unit. In this case, the navigation controller outputs an audio performance device operation command and a reproduction source switching signal to each audio performance device and the mode switching unit.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [Overall Configuration] FIG. 1 is a block diagram of an embodiment of the present invention. Reference numeral 11 denotes a map data storage unit such as a CD-ROM for storing a road map.

The map data includes a road layer and a background layer for displaying objects on the map.

Reference numeral 12 denotes a display device for drawing a map or a car position mark according to the current position of the car, and 13
Is a current position detection unit that calculates the current position based on the traveling distance and the direction of the running automobile.

Although not shown, a current position detector 13 detects a direction of travel of the vehicle (a geomagnetic sensor,
Position calculation CP for calculating the current position (latitude, longitude) of a vehicle based on an optical gyro, vibration gyro, etc.) and azimuth distance
U. 14 is a map search key and a map scroller.
An operation unit for operating navigation and other audio devices provided with a search key, a route search mode key, a set key, an operation start key, and the like; and 15, a map navigation controller; A map image (background, characters) around the current position is generated, and a vehicle position mark or the like is generated based on the vehicle position from the current position detection unit 13. At the same time, the radio receiver 17, the cassette player 18, and the CD player are generated. Y-19 and so on are determined.

Reference numeral 16 denotes a storage unit for storing road layer information of the map data. Reference numeral 20 denotes an amplifier 21 based on a mode switching signal from a navigation controller.
A mode switching unit for switching the audio signal to be output to the amplifier, 21 is an amplifier, and 22 is a speaker.

[Road Layer] The road layer has a data structure shown in FIG.

Among them, the road list RDLT gives attribute information of the road, and is composed of data such as the total number of nodes on the road, each node constituting the road, and the reception obstruction area. I have. Also, the intersection configuration node list CRL
T is a set of nodes (referred to as intersection nodes) closest to an intersection on a link connected to the intersection at each intersection on the map, and a node table NDTB indicates all nodes on the map.
This is a list of nodes, and location information (latitude, longitude) for each node
An intersection identification flag indicating whether or not the node is an intersection, an intersection indicates an intersection data if the node is an intersection, and a pointer indicating a road to which the node belongs if the node is not an intersection. The road layer information is used in map matching processing, route search processing, and the like.

[Overall Operation] When navigation is operated, the current position of the vehicle is input to the storage unit 16 from the navigation controller 15 based on the current position information input from the current position detection unit 13.

Since road layer information is stored in the storage unit 16, the navigation controller 15 monitors whether the stored vehicle position matches the input vehicle position. It should be noted that a match is determined to be a match if the distance between the vehicle position and the stored vehicle position is within the tolerance.

When the current position matches a predetermined vehicle position by the navigation controller, if the radio is being received, the reception of the radio is stopped and a performance operation command is output to the cassette player. When playback of the cassette player is impossible, that is, when no cassette tape is mounted, a performance operation command is output to the CD player. When the CD player cannot be reproduced, that is, when no disc is loaded, the radio is forcibly muted.

The present invention has been described with reference to the embodiments.
Various changes are possible in accordance with the gist of the present invention described in the claims of the present invention, and the present invention does not exclude these.

[0018]

As described above, according to the present invention, the correspondence between the position of the vehicle and the radio reception interference area data is stored in advance, and the current position of the vehicle output from the navigation controller is set. It is configured to monitor whether the position matches the position of the car, and if the position matches, switch to and output an audio performance device other than the radio, so that when the radio broadcast is received during driving, noise or noise is heard. Each time it runs out, the trouble of switching the audio source to an audio device such as a tape or a CD is eliminated, and a comfortable drive can be enjoyed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a data configuration diagram of a road layer.

[Explanation of symbols]

 Reference Signs List 10 Navigator 16 Car position / radio reception obstruction area storage unit 17 Radio receiver 18 Cassette player 19 CD player 20 Mode switching unit 21 Amplifier 22 Speaker

Claims (1)

(57) [Scope of request for utility model registration] A radio receiver and a cassette player;
A navigation device having means for controlling an audio performance device such as a CD player, a storage unit for storing a correspondence between a car position and a radio reception obstruction area, and a data output from the navigation device. Monitoring means for determining whether the current vehicle position matches a radio reception obstruction area in the storage section, and switching to another audio performance device when the monitoring means detects a match during radio reception. A navigation device comprising means.