JPH04107282U - car navigation system - Google Patents

Abstract

(57) [Summary] [Purpose] To provide road navigation guidance using sound. [Configuration] Checkpoints are set based on the straight-line distance to the destination, and passing through each checkpoint is determined in step S4. When a checkpoint is passed, the position and whether it is approaching or away from the destination are determined in step S5. A sound will let you know what is happening.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is related to car navigation systems, especially those that use sound to guide the car. The present invention relates to a car navigation system characterized by:

0002

[Conventional technology]

Conventional car navigation systems display the destination and destination on a map drawn on a display device. It only displays the car's location and indicates whether it is approaching or away from the destination while driving. There is no way to do so, so I have to frequently check the location of my vehicle using the displayed map. Not only does this increase the number of times the device must be operated, but it is also inconvenient to use the device. However, operational safety was a problem.

0003

[Problem that the invention attempts to solve]

This idea was made in view of the above points, and its purpose is knows you are driving in the right direction even if you look at the map screen only a few times Our goal is to provide a car navigation system that can

0004

[Means to solve the problem]

This invented car navigation system drives a map database. A database driver, based on the data accessed by said database driver. A graphic that stores the screen image in frame memory and sends a synchronization signal to the display device. control unit, input device for setting the destination, and position detection device for detecting the vehicle's position. control the alarm sound generator to sound the alarm sound through the speaker and each of the above devices. In a car navigation system equipped with a CPU, the destination is drawn on the display device. display it on the map, set several straight-line distances between the destination and your vehicle's position, and then A warning sound is emitted each time the vehicle passes a point at each distance.

[0005] In addition, in the car navigation system, depending on each set distance, In addition, when passing through a point at each distance, it shows whether you are getting closer or farther away from the destination. The type of warning sound changes depending on the situation.

[0006] Furthermore, the warning sound generator in the car navigation system is processed by voice synthesis. This system is used to notify the driver of the status of passing each set distance.

[0007]

[Effect]

According to the car navigation system of this invention, points at each set distance can be When the driver is passing, the driver can hear the notification by voice and check the map screen on the display device. This reduces the number of times you need to look, making operation easier and safer.

[0008]

【Example】

A car navigation system that is an example of this invention will be explained based on drawings. Ru. FIG. 1 shows the configuration of a car navigation system that is an embodiment of this invention. 2 shown in the figure is a map database that records map data. Accessed by the database driver 3. Input device 8 is controlled by CPU 1 Operate this device and set the destination. ROM14 contains the program that runs CPU1. The program and fixed data are stored. CPU1 is accessed by database driver 3. The accessed data and the destination position data input using the input device 8 are stored in the RAM 4. and sends a command to the graphic control unit 5 based on the data. . The graphic control unit 5 stores the screen image in the frame memory 7 according to the command. is stored and also sends a synchronization signal to the display device 6. Display device 6 is frame memory Display the screen image of 7 on the screen. The position detection device 9 detects the current position of the own vehicle. , the position data is written into the RAM 4 by the CPU 1. Warning sound generator 10 generates a warning sound signal, thereby causing the speaker 11 to sound.

[0009] Next, the operation of the car navigation system of this invention will be explained with reference to Fig. 2. Ru. First, when the device starts operating, in step S1, the CPU 1 loads the RAM 4. Initialize memory area and flags. Next, in step S2, the driver Display an enlarged map around the destination on the display device 6 using the button 8, and enter the destination. mark on the displayed map, and use the mark obtained from the map database. Write position data to RAM4. The driver then inputs the departure of his/her own vehicle into the input device 8. This is input into the device, and it is determined in step S3 whether or not the own vehicle has departed. Self When it is determined that the car has departed, the process moves to step S4 and the checkpoint Passage is determined. A checkpoint is a predetermined point between your vehicle and your destination. These are straight line distance values, A=1km, B=500m, C=100m, D=50m. It is written in ROM14. Also, for each straight line distance A to D, flags a to d is provided in RAM4. Flags a to d are initially set to 0. The CPU 1 calculates the straight-line distance N between the own vehicle position and the destination, and calculates it as each straight-line distance A to D. Compare with. When N is not equal to A to D, step S4 is repeated again, and N is equal to one of A to D, invert the corresponding flag and step The process moves to step S5. In step S5, the flag inverted in the previous step S5 is Generates a corresponding warning sound. i.e. if you are nearing your destination, flag is inverted from 0 to 1, and then a high frequency sound is emitted. from destination If it is moving away, the flag is inverted from 1 to 0, and then the low frequency A sound is emitted. Also, the warning sound will sound once when passing through A, and once when passing through B. It should sound twice, three times when passing through C, and four times when passing through D. D When the driver passes the point, the driver determines that the destination has been reached, and inputs information to the system from the input device 8. The arrival at the destination is input (step S6), and the operation of the system is ended.

0010 FIG. 3 shows the configuration of another embodiment of this invention. In this example, the example of FIG. The warning sound generator 10 that generates The output signal of 12 is amplified by an amplifier 13 and the speaker 11 sounds. Structure of other parts The configuration is similar to that shown in FIG. In this example, each checkpoint passage is Depending on the flag, a voice will say “You have passed Checkpoint A towards your goal. ” or “You have passed checkpoint A in the opposite direction to your goal.” be forced to This embodiment makes it easier to determine the operating status.

[0011] Although the embodiment is configured as described above, the invention is not limited to this. For example, the warning Instead of changing the sound by pitch, frequency, etc., by changing the strength, length, shortness, chord, etc. of the sound. The operating status may be notified.

0012

[Effect of the idea]

According to the car navigation system of this invention, the guidance method is different from the conventional one. Much of the visual map confirmation is done by hearing, so visual perception can be used for road navigation. It is possible to concentrate the information, which improves safety.

[0013] In addition, there are more opportunities to learn early on that you are going in the wrong direction and moving away from your destination. This eliminates time loss.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a car navigation system that is an embodiment of this invention.

FIG. 2 is a flowchart showing the operation of the car navigation system.

FIG. 3 is a block diagram showing a car navigation system according to another embodiment of the invention.

[Explanation of symbols]

1 CPU 2 Map database 3 Database driver 4 RAM 5 Graphic control section 6 Display device 7 Frame memory 8 Input device 9 Position detection device 10 Alarm sound generator 11 Speaker 12 Speech synthesis device 13 Amplifier 14 ROM

Claims (3)

[Scope of utility model registration request] 1. A database driver that drives a map database; a graphics control unit that stores a screen image in a frame memory based on data accessed by the database driver and sends a synchronization signal to a display device;
In a car navigation system that includes an input device for setting a destination, a position detection device for detecting the position of the own vehicle, a warning sound generator for emitting a warning sound through a speaker, and a CPU for controlling each of the above devices, is displayed on a map drawn on a display device, several straight-line distances between the destination and the vehicle's position are set, and a warning sound is emitted each time the vehicle passes a point at each of the set distances. car navigation system. 2. The type of warning sound as claimed in claim 1, wherein the type of warning sound is changed according to each set distance and according to whether the vehicle is approaching or away from the destination when passing through a point at each distance. car navigation system. 3. Replace the warning sound generator in the car navigation system of claim 2 with a voice synthesis processing device,
A car navigation system that is characterized by notifying the driver of the status of passing each set distance.