JPH0554299A - Curve road travel information annunciation device - Google Patents

Abstract

PURPOSE:To annunciates the degree of danger at the time of a curve road travel to a vehicle which enters a curve road according to a travel state such as an opposite vehicle, a vehicle speed, a road state at the curve road. CONSTITUTION:Vehicle detection parts 1 and 2, a vehicle kind discrimination part 4, and a danger degree display part 7 are installed at the entrances of both lanes of the curve road C, a road state detection part 3 is installed at a proper place of the inside lane C1, and a curve road curvature storage part 5 and a danger degree inference part 6 are installed inside the curve road C. The danger degree inference part 6 inputs output information from the vehicle detection parts 1 and 2, road state detection part 3, vehicle kind discrimination part 4, and curve road curvature storage part 5, infers the degree of danger of the entering vehicle on the curve road C, and annunciates it to the entering vehicle through a danger degree display part 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention infers the danger level of an approaching vehicle on a curved road from the presence or absence of an oncoming vehicle, traveling speed, road surface condition and the like, especially on a curved road with poor visibility. The present invention relates to a collision prevention device that notifies the degree of danger.

[0002]

2. Description of the Related Art Conventionally, as a device for informing traveling information when traveling on a curved road with poor visibility, there are a curve mirror for informing an oncoming vehicle and a sign for informing the curvature of the curved road.

[0003]

However, in such a conventional curved mirror, an oncoming vehicle cannot be confirmed or an oncoming vehicle is coming depending on the position and angle of the mirror and the position of the driver. There is a problem that you may miss things.

Also, depending on the sign that informs the curvature of the curved road, only the numerical value is displayed, and at what speed the vehicle can actually travel, or the current road surface condition indicates the current There is a problem that it is not possible to recognize whether the approach speed is dangerous.

Therefore, the present invention has been made in view of such a problem, and it has been proposed that an oncoming vehicle on a curved road, a vehicle speed,
It is an object of the present invention to provide a curved road traveling information informing device capable of informing a vehicle entering the curved road of the degree of danger at the time of traveling based on a traveling condition such as a road surface condition.

[0006]

In order to achieve the above object, the present invention provides a curved road traveling information informing device for informing a vehicle entering a curved road of traveling information during traveling on the curved road. Vehicle detection means for detecting the approaching vehicle, a traveling situation detecting means for detecting the traveling situation of the approaching vehicle detected by the vehicle detecting means on the curved road, and based on the detection output of the traveling situation detecting means,
Risk inference means for inferring the risk of the approaching vehicle detected by the vehicle detecting means, and risk notification for notifying the approaching vehicle detected by the vehicle detecting means of the risk inferred by the risk inferring means Means and are provided.

[0007]

In the above structure, the vehicle detecting means detects the vehicle entering the curved road, and the running condition detecting means detects the running condition of the vehicle on the curved road. Then, the risk degree inferring means infers the risk degree of the approaching vehicle detected by the vehicle detecting means based on the detection output of the traveling state detecting means, and informs the approaching vehicle of the risk degree.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a curved road traveling information notifying device according to the present invention will be described below with reference to the drawings. In this embodiment, the curved road will be described as two-way bidirectional traffic.

FIG. 1 is a block diagram showing the configuration of the present apparatus. The present apparatus is provided with vehicle detection units 1 and 2 for each of two lanes.
And a road surface state detection unit 3 as a traveling condition detection unit, a vehicle type identification unit 4, a curved road curvature storage unit 5, a risk level deduction unit 6, and a risk level display unit 7 as a risk level notification unit.

The vehicle detectors 1 and 2 are four-wheel vehicles and two vehicles approaching each other.
For a vehicle such as a wheeled vehicle, the distance to the vehicle and its speed are detected by utilizing the reflection of radio waves, ultrasonic waves, etc., and the Doppler effect.

The road surface state detecting section 3 detects whether the road surface of the curved road is dry or wet, and there are raindrop sensors, a method of detecting by reflected light when light is applied, and the like.

The vehicle type identification device 4 determines the size of the vehicle, that is, the size of the vehicle, that is, the size of the vehicle, the size of the vehicle, and the size of the vehicle. As shown in FIG. 2, the determination method is performed by sensors installed at a constant interval above the lane.

That is, the vehicle type identification device 4 is constructed by providing three sensors 4a above the lane 8 at regular intervals as shown in FIG. 2, and three sensors 4a as shown in FIG.
Is turned on at the same time by reflected light, large vehicles,
When two sensors 4a are simultaneously turned on by reflected light as shown in (b), it is a medium-sized car, and when only one sensor 4a is turned on as shown in (c), it is a small car. First, the vehicle type is determined by the length of the vehicle.

Further, the curved road curvature storage unit 5 stores the previously measured radius of curvature of the curved road.

The risk degree inference unit 6 inputs the output information from the vehicle detection units 1 and 2, the road surface state detection unit 3, the vehicle type identification unit 4, and the curved road curvature storage unit 5, and performs fuzzy inference as will be described later. The inference result is defuzzified and output as the degree of danger during running.

The risk level display unit 7 indicates the risk level during running from the risk level inference unit 6 as "safe", "caution", and "danger".
A message is displayed, or a level meter such as an LED is used to display the message in stages or in different colors in order to notify the vehicle entering the curved road.

FIG. 3 shows the installation locations of the components of the present device on the curved road C, and in this embodiment, the degree of danger at the time of traveling is transmitted only to the vehicle traveling on the inner lane C1 of the curved road C. I am trying.

That is, in this device, the vehicle detection units 1 and 2 are located at the entry points of the curved road C, the road surface state detection unit 3 is located at three appropriate places on the inner lane C1, and the vehicle type identification device 4 is located at the inner lane C1. A portion before the section 2, a danger level display section 7 at a position behind the vehicle detection section 2 on the inner lane C1, and a curved road curvature storage section 5 and a risk degree deduction section 6 are provided at a place other than the curved road C.

FIGS. 4A to 4E show membership functions when the risk inference unit 6 performs fuzzy inference. FIG. 4A is a membership function for the vehicle speed V, and FIG. Is up to the vehicle detectors 1 and 2, that is, the curved road C
Membership function for the distance S to the entrance,
(C) is a membership function for the road surface condition W whether the road surface is dry or wet, (d) is a membership function for the radius of curvature R of the curved road C, and (e) is a vehicle model K, that is, the size of the vehicle. A membership function for,
(F) has shown the membership function about the risk level d.

Next, in the present apparatus thus constructed,
As shown in FIG. 3, when the vehicle enters the inner lane C1 of the curved road C, the vehicle detection units 1 and 2, the road surface state detection unit 3, the vehicle type identification unit 4, and the curved road curvature storage unit 5 output The information is sent to the risk degree inference unit 6.

In the risk degree inference unit 6, the vehicle detection units 1, 2,
The output information from the road surface state detection unit 3, the vehicle type identification unit 4, and the curved road curvature storage unit 5 is input to perform fuzzy inference, that is, based on a predetermined fuzzy rule.
The fitting degree of each input information to the membership function shown in (d) is obtained, the minimum value of the matching degree is obtained for each fuzzy rule, and the minimum value for each rule and the output membership shown in (e) are obtained. Performs min operation with the function.

Here, an example of a fuzzy rule at the time of fuzzy inference will be shown. In the case of FIG. 3, since the oncoming vehicle is coming from the outer lane C2, the speed of the vehicle traveling on the inner lane C1 is represented by VA, and the distance to the entrance of the curved road C is represented by SA, while the vehicle traveling on the outer lane C2 is represented. The speed of the vehicle is represented by VB, and the distance to the entrance of the curved road C is represented by SB.

If VA = High, SA = Near, VB = High, SB = Near, W = Wet, R = Sudden, K = Large, then = Danger if VA = High, SA = Near, VB = High, SB = Near, W = dry, R = slow, K = medium then d = note ..... if VA = low, SA = far, VB = low, SB = far, W = dry, R = slow, K = small then d = Ans. Based on each of the fuzzy rules, the output membership function shown in FIG. 4 (e) and the min operation are performed, and the obtained output membership functions are operated on max,
The membership function after the calculation is defuzzified, for example, the center-of-gravity value is obtained on FIG. 4 (e), and this center-of-gravity value is output as the degree of danger.

The risk level display section 7 displays "safe" when the center of gravity value from the risk level inference section 6 is 0 to 0.3, and "caution" and 0.6 to 0.6 when it is 0.3 to 0.6. 1.0
In this case, "Danger" is displayed to inform the approaching vehicle in the inner lane C1 of the degree of danger.

Therefore, according to this device, the vehicle entering the inner lane C1 of the curved road C has the oncoming vehicle, the speed of the oncoming vehicle, the road surface condition, the size of the own vehicle, the speed of the own vehicle, the curve. It can be recognized in advance from the running condition such as the radius of curvature of the road C that the current approach speed is dangerous, and the over lane to the outer lane C2 due to the excessive speed is reduced.

In this embodiment, the curved road has been described as two-way bidirectional traffic. However, in the present invention, even if the curved road is one-way one-way traffic, two or more lanes are bidirectional. Alternatively, one-way traffic may be used.

Further, in the present embodiment, the vehicle type identification section and the danger level display section are provided only in the inner lane C1 of the curved road C where the lane overrun is likely to occur so that only the traveling vehicle in the inner lane C1 is informed of the danger level. However, in the present invention, it is of course possible to provide a vehicle type identification section and a danger level display section in the outer lane C2 to notify the danger level to the vehicles traveling in both lanes.

Further, in the present embodiment, the risk notifying means is explained by the risk display section 7, but in the present invention, each vehicle is provided with the signal receiving section and the signal display section, and the danger inferred on the curved road is provided. The risk notification means may be configured by providing a risk transmitting means for transmitting the degree, and the risk inferred from the running condition may be directly transmitted to the vehicle.

[0029]

As described above, according to the present invention, a vehicle entering a curved road is detected, the running condition of the vehicle on the curved road is detected, and the risk of the approaching vehicle is inferred from the running condition. This approach informs the approaching vehicle of this danger level, so that the approaching vehicle can recognize in advance whether it is dangerous at the current driving speed on the curved road or at the current approaching speed, and if the approaching vehicle drops to a safe approaching speed, the lane is overrun. Etc. will decrease.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a curved road traveling information notification device according to the present invention.

FIG. 2 is an explanatory diagram showing a method for determining the size of a vehicle in a vehicle type identification unit.

FIG. 3 is an explanatory diagram showing installation locations of constituent elements of the apparatus on a curved road.

FIG. 4 is an explanatory diagram showing a membership function used when fuzzy inference is performed by a risk degree inference unit.

[Explanation of symbols]

 1 Vehicle Detection Unit 2 Vehicle Detection Unit 3 Road Surface State Detection Unit (Running Situation Detection Means) 4 Vehicle Type Identification Unit (Running Situation Detection Means) 5 Curved Road Curvature Storage Unit (Running Situation Detection Means) 6 Danger Level Inference Unit 7 Danger Level Display Department (danger degree notification means)

Claims (1)

[Claims] 1. A curved road traveling information notifying device for informing a vehicle entering a curved road of traveling information when traveling on the curved road, the vehicle detecting means for detecting a vehicle entering the curved road, and Danger of inferring the degree of danger of the approaching vehicle detected by the vehicle detecting means, based on the running situation detecting means for detecting the traveling situation of the approaching vehicle detected by the vehicle detecting means, and the detection output of the running situation detecting means Curve road traveling information notifying device comprising: a degree inference unit; and a risk degree informing unit for informing an approaching vehicle detected by the vehicle detection unit of the risk degree inferred by the risk degree inference unit. ..