JP3321230B2 - Safe driving instruction 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 safe driving instruction device for promoting safe driving of a vehicle such as an automobile.

[0002]

2. Description of the Related Art In particular, when driving a mountain road by car, suddenly, a sharp curve comes in a place with poor visibility,
It is often dangerous to suddenly narrow the road. In such a case, when the sudden brake is applied, there is a high possibility that the vehicle slips or falls over and an accident occurs, and it is necessary to decelerate sufficiently before passing. Therefore, the driver can decelerate in advance in an area where the road conditions are sufficiently in mind and pass safely. However, this prediction cannot be made in the first area or an uninformed area. Without predictable equipment, you would be forced to run at lower speeds than necessary,
And I can't drive safely.

FIG. 2A is a block diagram showing a so-called conventional in-vehicle navigation device.
Is a position detecting unit that detects the running position of the vehicle using, for example, GPS, 2 is an information storage unit that stores road maps of various places, and 3 is a position corresponding to the position of the vehicle detected by the position detecting unit 1. A road information retrieval unit 4 for retrieving a road map is a display unit 4 for displaying the road map retrieved by the road information retrieval unit 3 by attaching the position of the vehicle. FIG. 2B is a diagram showing a display example of the display unit 4, and an arrow 40 is a mark indicating the position of the own vehicle.

The navigation apparatus shown in FIG. 2 is displayed on the display unit 4 as shown in FIG. 2 (B), and a road map on which the vehicle is to travel is displayed on the display unit 4. It can be expected that the road is narrow due to a sharp curve ahead, so that it can be determined to some extent how much the driver should decelerate.

[0005]

In the above-described on-vehicle navigation device, the road condition is displayed on a map even in the first region or in an unfamiliar region. The display on the map has a problem that the details of the road condition cannot be understood and the sense of reality is lacking, so that it is not sufficient as a safe driving instruction device.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a safe driving instruction device that specifically and accurately indicates a safe driving speed even in an unguided place.

[0007]

According to the present invention, there is provided a safe driving instruction apparatus for storing at least a limit vehicle speed at which a general vehicle can safely travel on a road at each predetermined point in association with a road map; A means for detecting the position of the own vehicle in the vehicle and sequentially instructing the driver of the limit vehicle speed for each position of the own vehicle, and specifically instructing the limit vehicle speed in accordance with the movement of the vehicle even in unfamiliar places. In addition, a device for instructing the limit vehicle speed in consideration of the traveling performance of the own vehicle is used.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1A is a block diagram schematically showing a configuration of a safe driving instruction device according to the present invention. In the drawing, reference numeral 1 denotes a position detecting unit for detecting the position of the vehicle, and a method for detecting the position is as follows. Any method may be used, such as using radio navigation such as GPS or Loran, using dead reckoning of a vehicle speed sensor and a direction sensor, or using both of them, or using a method obtained from a beacon receiver.

Reference numeral 2 denotes a road information storage unit. The road information storage unit 2 is constituted by, for example, a CD-ROM or the like. Curvature, width, road condition, name, position, etc.). Reference numeral 3 denotes a road information search unit which searches a corresponding road map and road condition information from the position of the own vehicle detected by the position detection unit 1, attaches a mark indicating the position of the own vehicle to the road map, and displays a display unit 4 And the road condition information is sent to the limit vehicle speed calculation unit 6.

[0010] The vehicle information storage section 5 stores running performance information of the vehicle. For example, in the vehicle, how much centrifugal force (so-called lateral g) can be supported by the frictional force of the tire, and the like. For example, the grip value may be changed). The traveling performance information from the vehicle information storage unit 5 is sent to a limit vehicle speed calculation unit 6, where the limit vehicle speed at the point is calculated, and this information is sent to the instruction unit 7, and the upper limit of the vehicle speed at which the vehicle can safely travel Is indicated.

For example, when the road approaches a curve, the lateral g with respect to the vehicle speed is calculated from the curvature of the road obtained from the road condition information, and the upper limit of the vehicle speed is obtained from the lateral g that the vehicle can withstand obtained from the vehicle information storage unit 5. Is calculated and the instruction unit 7 instructs this. FIG. 1B is a diagram illustrating an example of an instruction of the instruction unit 7.
It indicates that the vehicle should pass within 0 km, and currently indicates that the vehicle should be decelerated to 30 km / h or less.

The instruction of the limit vehicle speed by the instruction unit 7 is shown in FIG.
The instruction is not limited to the image instruction using the LCD or the LED as shown in FIG. Further, in this embodiment, an example is shown in which the display unit 4 is associated with the conventional display unit 4 for displaying road map information. However, for example, a mark indicating the limit vehicle speed is illuminated on the numerical value of the speedometer. Display may be performed. Further, in the above-described embodiment, the vehicle information storage unit 5 is provided to calculate the limit vehicle speed for each vehicle. However, the limit vehicle speed at which all vehicles can safely travel is determined in advance from the road condition information. This may be stored, and when the vehicle reaches the position, the numerical value may be indicated by the indicating unit 7.
In this way, the apparatus can be simplified and the limit vehicle speed can be quickly indicated.

[0013]

As described above, the safe driving instructing device of the present invention can specify the safe driving speed concretely and accurately even in an unfamiliar place. In addition to avoiding the danger of overturning the vehicle, the vehicle does not need to be forced to run at a lower speed than necessary.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of the present invention.

FIG. 2 is a diagram showing a conventional in-vehicle navigation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Road information storage part 2 Position detection part 3 Road information search part 4 Display part 5 Vehicle information storage part 6 Limit vehicle speed calculation part 7 Instruction part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-89298 (JP, A) JP-A-4-243665 (JP, A) JP-A-3-53142 (JP, A) JP-A-3-53 268110 (JP, A) JP-A-4-75200 (JP, A) JP-A-4-236699 (JP, A) JP-A-2-501959 (JP, A) (58) Fields investigated (Int. Cl. ^7, DB name) G08G 1/09 - 1/16 G01C 21/00 G09B 29/10 B62D 6/00

Claims (2)

(57) [Claims] 1. At least for each predetermined point on each road, road curvature information at that point or road condition information related to a safe driving speed such as a road width or a road surface condition is stored in association with a road map. Means for storing at least traveling performance information of the vehicle such as how much centrifugal force (so-called lateral g) the vehicle can support during traveling, and detecting the position of the vehicle during traveling The position detecting means, and the road speed information and the traveling performance information for each position of the own vehicle detected by the position detecting means, for each point, sequentially determine the limit vehicle speed of the vehicle at which the vehicle can safely travel at the point. calculating means for calculating, a safe driving instruction apparatus comprising an instruction unit that instructs the sequential luck hand's limit vehicle speed of the vehicle, the further data according to the travel distance of the running performance information The deterioration of the Ya
A means for sequentially rewriting as information that changes based on
Safe driving instruction device which is characterized in that there was example. 2. The display of the limit vehicle speed by the instruction means,
According to the image information of the road map near the travel point,
2. The safe driving instruction device according to claim 1, further comprising means for displaying a single numerical value or a continuous image display of a plurality of numerical values of a point to be passed from a point which has already passed.