JPH0820266B2 - Vehicle guidance device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to an improvement of a vehicle travel guide device for guiding a vehicle to a target position.

(B) Conventional Technology In recent years, a vehicle travel guidance device for guiding a vehicle to a target position has been standardized and developed. According to such a device,
Since the map of the driving area, the route to the target position and the traveling position of the vehicle are displayed on the CRT display equipped in the vehicle, the driver can reach the target position by referring to the screen of the CRT display. Can be reached quickly. In such a device, the map information is stored in a compact disc for each region, and when the map is displayed, the map information of the designated region is read from the disc, reproduced, and drawn on the CRT screen.

In addition, the route to the target position is achieved by inputting the current position of the vehicle and the target position on the map drawn on the CRT screen by moving the cursor, and the device side responds to such input in both directions. Of the roads connecting the positions, the shortest one is selected and this road is displayed, for example, by changing the color. The traveling position of the vehicle at the time of guiding the vehicle is obtained by adding the traveling direction and the traveling distance to the current position input by the cursor movement by the direction sensor that detects the traveling direction of the vehicle and the distance sensor that detects the traveling distance of the vehicle. It is obtained by updating the current position of the vehicle from the bird's eye.

(C) Problems to be Solved by the Invention However, in the above-mentioned conventional technology, since the traveling position is detected by accumulating the direction and the distance by the sensor, an accumulated error occurs in the traveling position display, and therefore, on the CRT screen. There may be a deviation between the position of the vehicle displayed on the screen and the actual position of the vehicle. In addition, the driver cannot always keep an eye on the CRT screen while driving, and thus, to some extent, the driver will drive along the guide route by speculation. Under such circumstances, the driver is constantly worried whether the route on which the vehicle is traveling is the correct guide route, and as a result, the mental state becomes unstable and the driver may not be able to drive well. .

Therefore, the present invention is to provide a vehicle travel guidance device that allows a driver to recognize whether or not a vehicle is traveling on a guidance route correctly.

(D) Means for Solving the Problems In view of the above problems, the present invention sets a plurality of passing points on a guide route, and provides a storage unit for storing the passing points, and a vehicle passes the passing points. Then, a sounding means is provided in accordance with this.

(E) Action When the vehicle passes the passing point on the guide route, the sounding means emits a voice. The driver can confirm that he / she is passing the guide route correctly by listening to such a voice.

(F) Example Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a circuit block diagram showing a basic circuit configuration of the present invention. (1) is a signal processing device including a computer,
(2) is a direction sensor that detects the traveling direction of the vehicle by geomagnetism, (3) is a distance sensor that measures the traveling distance of the vehicle from the rotational speed of the wheels, (4) is the cursor movement on the CRT screen,
Or an operating device for switching the map screen,
(5) is a compact disc that stores map information,
A disk reproducing device for reading and reproducing desired map data in response to a command from the operating device, (6) is a display device for drawing a designated map on a CRT screen based on the map data, and (7) is a sounding device. is there. When the desired area is designated by operating the operation device (4), the map data of the area is searched and reproduced by the disk reproducing device, and the map of the specified area is displayed on the CRT screen in the display device (6). Is drawn as shown in FIG.

After the map is drawn in this way, the driver operates the operating device to move the cursor to the destination and the departure point, and presses the input key each time, and the signal processing device operates according to the input information. The guide route from the starting point to the destination is selected and displayed by changing the color on the map (shown by diagonal lines in FIG. 2). At the same time, the current position of the vehicle is displayed by the symbol ().

When the guide route is thus determined, the intersection (-) existing on the guide route is identified next, and the longitude and latitude information (x _n , y) immediately after the intersection is crossed along the guide route.
_n ) is a RAM in the signal processing device (1) as a vehicle passing point
Is stored. In addition, in FIG. 3, the passing point to be stored is A ₁
.About.A4, and FIG. ₄ is a diagram showing the state of the RAM storing the passing points.

When the vehicle moves after that, the movement is detected by the azimuth sensor (2) and the distance sensor (3) and accumulated in the current position information (longitude and latitude information). Therefore, the current position information of the vehicle is sometimes moved along with the movement of the vehicle, and the symbol () indicating the current position of the vehicle is moved on the map by the movement of the current position information.

In the above state, when the vehicle passes through the passing points A _{1 to} A ₄ in order, this is detected by the signal processing device, and the sounder (7) outputs a sound accordingly. Such a sound may be, for example, an oscillating sound such as “peeping”, or may be a sound output in words such as “passing a passing point”. The passing of the passing point is detected by the matching of the longitude and latitude information of the passing point and the current position of the vehicle.

Next, the sounding operation at the time of guiding the vehicle will be described with reference to the flowchart of FIG.

When the vehicle guided traveling is started, n = 1 in step 1
Is set. The variable n indicates the address of the passing point information stored in the RAM. Thus, the variable n is n =
If it is set to 1, then in step 2, it is judged whether or not the variable n exceeds the number of intersections on the guide route. If NO is determined in step 2, then in step 3, the current position information of the vehicle is input to the signal processing device (1).
Then, the current position information and the latitude / longitude information stored at the address n in the RAM, that is, the latitude / longitude information stored at the address 1 in this case are compared by the signal processing device (1), and it is determined whether or not they match. Is determined (step 4). If the decision result in the step 4 is NO, the process returns to the step 2 again and the same program operation as described above is executed. In this case, only the current position information of the vehicle in step 3 changes momentarily.

Then, when the vehicle passes the intersection shown in FIG. 2 along the guide route, the current position information of the vehicle and the passing point information of address 1 coincide with each other, which is detected in step 4, and accordingly step At 5, a buzzer sound is emitted from the sound generator (7) for several seconds. When the buzzer sound is generated in this manner, n = n + 1 is then calculated in step 6 and then the process returns to step 2 and the same program operation as above is executed. According to such a program operation, the RAM address n to be compared with the current position of the vehicle in step 4 is n =
Therefore, it is determined whether or not the vehicle has passed the passing point A ₂ , and when the vehicle passes the passing point A ₂ , a buzzer sound is emitted in step 5.

After passing the passing point A ₂ as described above, the RAM address n of the passing point to be compared in step 4 is incremented to n = 3, n = 4 by the calculation of n = n + 1 in step 6, Therefore, it is determined whether or not the vehicle has passed the passing points A ₃ and A ₄ in order.

In this way, the vehicle turns right at the last intersection and passes through the intersection A ₄
When n is passed, n = 5 is set by the calculation in step 6, whereby YES is determined in step 2 and the program operation according to the above flowchart is ended.

As described above, according to the present embodiment, the buzzer sound is emitted when the vehicle correctly passes through the intersection on the guidance route, and thus the driver confirms that the vehicle is traveling correctly by the buzzer sound. Since it is possible to determine, it is possible to drive the vehicle with peace of mind.

In the above embodiment, the passing point is the latitude and longitude information at the center of the road. In this case, however, if a cumulative error occurs in the current position of the vehicle when the vehicle is traveling, the actual current position of the vehicle will coincide with the passing point. However, the accumulated current position information of the vehicle may deviate in the road width direction from the longitude / latitude information of the passing point, and a match between the two information may not be detected.
Therefore, in order to eliminate such an inconvenience, a plurality of latitude and longitude information of passing points to be stored is increased in the road width direction and stored in the RAM, and the current position information of the vehicle and all these passing point information are compared. If so, the passage of the vehicle can be reliably detected. Also for a wide road such as a main road, if a plurality of longitude and latitude information is stored in the road width direction as the passing point information as in the above, it is possible to eliminate a vehicle passage detection error.

(G) Effect of the Invention As described above, according to the vehicle travel guidance device of the present invention, when the vehicle correctly passes the predetermined passage point on the guidance route, a voice is emitted, so that the driver hears this voice. You can check the correct running of the vehicle, so you can safely drive the vehicle to your destination.

[Brief description of drawings]

Each of the drawings shows an embodiment of the present invention. Fig. 1 is a circuit block diagram, Fig. 2 is an example of a map drawn on a CRT screen, and Fig. 3 is a set position of a passing point. Showing the figure,
FIG. 4 is a view showing a state in the RAM, and FIG. 5 is a flow chart for executing the traveling discriminating operation. (1) ... Signal processing device (storage means and discrimination means) (7) ... Sound generator (sound generation means).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiko Kondo 2-18, Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-61-290476 (JP, A) JP-A-58 -137707 (JP, A) JP 61-212721 (JP, A) JP 62-293117 (JP, A) JP 61-100899 (JP, A)

Claims (2)

[Claims] 1. A storage medium for storing map information, reading means for reading the map information from the storage medium, and display means for displaying the map information read by the reading means on a screen. Guide route setting means for setting a guide route to a destination on the map displayed in, position detecting means for detecting the current position of the vehicle, and current position display means for displaying the current position of the vehicle on the map. In a vehicle traveling guidance device including: a storage unit that stores a passage point on the guide route; and whether the vehicle has passed the passage point based on position information by the storage unit and the position detection unit. A vehicle running guidance device comprising: a determining unit; and a sounding unit that outputs a sound when the determining unit determines that the passing point has been correctly passed. 2. The vehicle running guidance device according to claim 1, wherein the passing point is an intersection on the guidance route.