JPH08320238A - Path guide for vehicle - Google Patents

Abstract

PURPOSE: To perform path guidance based on vehicle speed. CONSTITUTION: A vehicle path guide for guiding a path leading to the destination by voice or/and display guidance has a vehicle speed computing part 9 for detecting the vehicle speed, and a path guide computing part 10 for computing spots suitable for path guidance on the basis of the vehicle speed detected by the vehicle speed computing part 9. The path guide computing part 10 performs path guidance at the earlier spot as the vehicle speed detected by the vehicle speed computing part is faster.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle route guiding device for guiding a route by voice and / or display.

[0002]

2. Description of the Related Art Conventionally, a vehicle route guiding device for guiding a route to a destination has been known, and there is a device for guiding a route by voice as well as a display by a display.
With such a device, when the vehicle approaches the intersection (or branch point) that changes the direction to the right (or left) while traveling on the set route, the vehicle is ahead of the intersection (or branch point) by a predetermined distance. At the point, a display prompting you to turn right or left is displayed and a guidance voice is output.

[0003]

However, in the conventional route guidance device, the route guidance is started before the predetermined distance. Therefore, when the vehicle speed is slow, it takes a long time from the route guidance to the intersection,
When the vehicle speed is fast, the time becomes shorter. Therefore, there is a problem that route guidance is not performed at an appropriate timing.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a vehicle route guidance device which performs route guidance at appropriate timing.

[0005]

The vehicle route guiding device is a vehicle route guiding device for guiding a route to a destination, and comprises a vehicle speed detecting section for detecting the speed of a vehicle and the vehicle speed detecting section. And a route guidance calculation unit that calculates a point at which route guidance is started based on the detected vehicle speed.

[0006] Further, in the vehicle route guidance device, the route guidance calculation unit starts the route guidance at an earlier stage as the vehicle speed detected by the vehicle speed detection unit becomes faster.

[0007]

The vehicle speed detection unit of the vehicle route guidance device measures the vehicle speed and sends the measured value to the route guidance calculation unit. The route guidance calculation unit calculates a point suitable for starting route guidance from the sent measurement values. When the traveling vehicle reaches a point suitable for starting route guidance, voice or / and display guidance
Guide the route to the destination. That is, the faster the vehicle speed detected by the vehicle speed detection unit, the faster the route guidance.

As described above, the vehicle route guidance device of the present invention enables more reliable route guidance because the appropriate timing for route guidance is determined by the distance and the vehicle speed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall configuration diagram showing an embodiment of a vehicle route guiding apparatus according to the present invention.

The operation unit 1 is for inputting various data, and the driver operates this to set a traveling destination and start route guidance. In the road information storage unit 2,
Road information is stored. The GPS receiver 3 receives radio waves from a plurality of satellites, and the current position (latitude, longitude, altitude)
To detect. The distance sensor 4 outputs, for example, a pulse signal for each unit traveling distance according to the rotation of the tire of the automobile. The azimuth sensor 5 is composed of, for example, a gyroscope that detects a change in the angular velocity in the yaw direction, and outputs a signal proportional to the amount of change in the direction as the vehicle travels. The current position calculation unit 6 counts the number of pulse signals sent from the distance sensor 4 to measure the traveling distance of the vehicle, and determines the change in the traveling direction according to the output signal of the azimuth sensor 5 in the vehicle. The position on the two-dimensional coordinates for each unit travel distance of, and the position obtained from the GPS receiver 3,
The current position is obtained by sequentially calculating. The route calculation unit 7 calculates the optimum route to the traveling destination input from the operation unit 1 with the current position obtained from the current position calculation unit 6 as a starting point. The route storage unit 8 stores the optimum route calculated by the route calculation unit 7. The vehicle speed calculation unit 9 detects the amount of change in position over time from the current position sequentially calculated by the current position calculation unit 6, and calculates the vehicle speed. The route guidance calculation unit 10 searches for a point requiring route guidance such as an intersection that makes a right or left turn, based on the current position from the current position calculation unit 6 and the optimum route from the route storage unit 8. Further, by calculating the searched route guidance and the vehicle speed detected by the vehicle speed calculation unit 9, the point where the route guidance is started is determined. At the route guidance starting point determined here, the route guidance by the route guidance calculation unit 10 is displayed on the display unit 11, and at the same time, the guidance voice is played from the voice unit 12. The device configured as described above notifies the route guidance by voice and display at a point where the route guidance according to the detected vehicle speed is started, that is, a point closer to the front side as the vehicle speed becomes faster.

When utilizing the route guidance by the route guidance guiding device, the driver first sets the traveling destination point on the operation unit 1. When the destination point is set, the route calculator 7 calculates the optimum route from the current position to the destination point. Then, after the calculated optimum route is stored in the route storage unit 8, the route guidance calculation unit 10 provides route guidance as the vehicle travels. FIG. 2 shows a flowchart of the processing procedure of the route guidance calculation unit 10.

First, the current position P is obtained from the current position calculation unit 6 (S21). Next, it is determined whether or not the current position P is the destination (S22). According to this determination, when the current location P is the destination, the guidance is completed, and thus the route guidance calculation unit 10
To end. On the other hand, when the current position P has not reached the destination, the optimum route R calculated by the route calculation unit 7 is obtained from the route storage unit 8 (S23). Then, based on the obtained relationship between the optimum route R and the current position P, the target point X such as an intersection requiring the next route guidance at the current position P is detected (S24). When the route guidance point X is detected, the distance L [m] between the point X and the current position P is calculated (S25).
Next, the vehicle speed V [m / s] is obtained from the vehicle speed calculator (S26).
Here, the target point X for route guidance from the point where route guidance is performed
Is set to a predetermined time T [s]. Then, it is determined whether the value obtained by dividing the distance L by the vehicle speed V (L / V) is smaller than T (S27). Here, the L / V value indicates the time required from the current position P to the route guidance point X. Therefore, when it is determined that L / V <T, it means that the time from the current position P to the point X is shorter than the predetermined time T. That is, the traveling vehicle has arrived near the point X from the point where the route guidance of the point X is started. When determined in this way, the voice section 12 and the display section 11
The route guidance of the route guidance point X is performed by voice and display respectively (S28). Then, the process returns to S21 and the operations up to S28 are repeated until the destination is reached. On the other hand, when the determination in S27 is L / V ≧ T, the time from the current position P to the point X is the predetermined time T.
Means longer. That is, the current position P of the traveling vehicle has not reached the point where the route guidance should be started. In this case, after detecting the current position in S29,
Re-execute from S25.

It should be noted that the predetermined time T may be set by the driver so that it can be set and changed to a time suitable for each.

3 and 4 show display examples of route guidance. In FIG. 3, an arrow 31 indicates the current position and traveling direction of the traveling vehicle. 32, 33, 34 and 35
Is showing the road. 36 is an intersection. A thick solid line 37 indicates the optimum route calculated by the route calculation unit 7. The display in FIG. 3 indicates that the vehicle is currently traveling on the road 33 and is in a position before turning left at the intersection 36 to proceed to the road 34. In this case, the traveling vehicle has not reached the route guidance start point, so the determination in S27 of the processing procedure in the route guidance calculation unit 10 is L / V ≧.
T. However, when the traveling vehicle reaches the route guidance start point (determined in S27 is L / V <T), the
The display unit 11 changes from the display of FIG. 3 to the enlarged view display of the route guidance point X (in this case, the intersection 36) of FIG.

In FIG. 4, 41 is a route guidance point X.
The name of the intersection (in this case) and how it should turn are displayed. At 42, the remaining time from the time point T, that is, the route guidance start point according to the vehicle speed to the point X (intersection) is displayed. Therefore, the remaining distance displayed is
The faster the vehicle speed, the less. In addition, the display unit 11
Changes to the enlarged view shown here at the appropriate route guidance start point, and at the same time, the voice section 12 displays "○○
Please turn left at the intersection. " By the change of the display unit 11 and the guidance of the voice unit 12 as described above, the smooth route guidance of the traveling vehicle can be performed.

As described above, in the vehicle route guidance device including the vehicle speed detection unit and the route guidance calculation unit, the proper timing of the route guidance is determined by the distance and the vehicle speed, so that a more reliable route is provided. Allows induction.

[0017]

According to the vehicle route guiding apparatus, the route guidance calculating section calculates a point suitable for starting route guidance according to the vehicle speed measured by the vehicle speed detecting section. At the point suitable for the calculated route guidance, the traveling vehicle guides the route to the destination by voice or / and display guidance.
By thus determining the timing of route guidance in consideration of the distance and the vehicle speed, more reliable route guidance is enabled.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a vehicle route guidance device according to the present invention.

FIG. 2 is a flowchart showing a processing procedure of a route guidance calculation unit.

FIG. 3 is a diagram showing a display example of the apparatus of this embodiment.

FIG. 4 is a diagram showing a display example of the device according to the present embodiment, and is a diagram showing an example of enlarged display when the vehicle approaches an intersection that makes a left turn or a right turn.

[Explanation of symbols]

1 operation unit, 2 road information storage unit, 3 GPS receiver,
4 distance sensor, 5 direction sensor, 6 current position calculation unit,
7 route calculation unit, 8 route storage unit, 9 vehicle speed calculation unit, 1
0 route guidance calculation unit, 11 display unit, 12 voice unit, 3
1 present location and traveling direction display, 32, 33, 34, 35
Roads, 36 intersections, 37 optimal routes, 41, 42
Route guidance display.

Claims (2)

[Claims] 1. A vehicle route guidance device for guiding a route to a destination, wherein a vehicle speed detection unit for detecting a vehicle speed, and route guidance is started based on a vehicle speed detected by the vehicle speed detection unit. And a route guidance calculation unit that calculates a point suitable for the route guidance device for a vehicle. 2. The vehicle route guidance apparatus according to claim 1, wherein the route guidance calculation unit performs route guidance at an earlier stage as the vehicle speed detected by the vehicle speed detection unit is higher. Route guidance device.