JP2002269689A - Control system of red signal ignoring prevention - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control system of red signal ignoring prevention capable of preventing an accident in advance by controlling red signal ignoring prevention by equipment of infrastructure on a road side and equipment of various devices on a vehicle side. SOLUTION: This system is provided with a road surface detection means, a processing means for preparing data for a vehicle based on the information from an interface with a signal, a road surface situation from the road surface detection means, and an interface with it, a communication means for transmitting the prepared data, a position detection support means for letting the vehicle grasp a position of the running vehicle, a position detection means for detecting this support means every time the vehicle passes, communication means on the road side and the vehicle side, an own vehicle speed detection means, a processing means for deciding a possibility that the own vehicle ignores a red signal based on the information from the detection means, the information from the communication means, and the information by detecting the own vehicle, a control means for controlling own vehicle's speed, and a vehicle interface for exchanging information with a driver.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a red light ignoring prevention control system in a vehicle control technical field for preventing a vehicle from running ignoring a red light of a traffic light installed on a road.

[0002]

2. Description of the Related Art It goes without saying that a serious accident will occur if a red light is ignored on a road. Currently, there is no way to prevent red light from being ignored. The present invention relates to the prevention of red light ignorance by making use of recent highly developed technology.

Recently, intelligent transportation systems (Intelligen
Under the name of “Transport Systems (hereinafter referred to as ITS),” the advancement of road systems has become a topic in Japan and overseas. The purpose of this ITS research is to make use of advanced information and communication technology, computer technology, control system technology, etc., and to improve vehicle safety and road efficiency.

[0004] As one of the ITSs, research on driving assistance technology for cars has been conducted, but no specific application device has been realized. The technology has not been established yet.

[0005]

The reasons for ignoring a red light on a road or the like are as follows. 1. When the driver inadvertently overlooks the signal. 2. When the signal is difficult to see, such as on a west day, or when the signal cannot be seen with a large car in front, etc. There are various cases, such as a red light but an attempt to force a pass. In order to prevent such a red light from being ignored, the problem is solved by equipping roadside infrastructure equipment and various equipment on the vehicle side (a vehicle equipped with various equipment is hereinafter referred to as an AHS vehicle).

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to control the prevention of red light ignorance by installing roadside infrastructure equipment and various equipment on the vehicle side to prevent an accident.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a road condition detecting means for detecting a road condition such as freezing or wetness, an interface means for a traffic light,
Roadside processing means for inputting the road surface condition detected by the road surface condition detecting means and the traffic signal information obtained by the interface means to create data to be output to the car, and transmitting the output data created by the roadside processing means to the car. Roadside vehicle-to-vehicle communication means, position detection support means installed on the road so that the car can grasp the absolute position and relative position of the running car, and a vehicle equipped with the following means: a position detection support installed on the road Vehicle position detecting means for detecting the information each time a vehicle passes through the means; roadside vehicle-to-vehicle communication means for obtaining data communicated from the roadside road-to-vehicle communication means; Own vehicle state detecting means for detecting, information obtained by the own vehicle position detecting means, information obtained by the road-to-vehicle communication means, and information detected by the own vehicle state detecting means. On-board processing means for determining the possibility of ignoring the red light, on-vehicle control means for controlling the speed of the vehicle, and vehicle human interface means for exchanging information with the driver. is there.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A scenario of a red light ignoring prevention control system model of the present invention will be described with reference to FIG. Figure 1
Indicates an intersection of a general road where a traffic light is installed, and is a typical portion to which the present invention is applied. The scenario here is that when a service target vehicle enters the service area and there is a possibility that the red light will be ignored, the warning and control actions are serviced out to the center of the vehicle along with the progress of the vehicle. Describe up to.

In FIG. 1, an AHS vehicle entering a service area (point P1) recognizes that there is a service of red light ignoring prevention control and activates a function of a red light ignoring prevention control service. The AHS vehicle grasps the position of the vehicle and the position (distance) to the stop line before the traffic light, and simultaneously calculates the position of the vehicle.

The AHS vehicle that has passed the point P1 and activated the service function of the red light ignoring prevention control immediately obtains the signal information of the traffic signal ahead and the road surface condition information in the vicinity from the roadside infrastructure. It is assumed that the signal information of the traffic signal and the road surface condition information are broadcast at a fixed cycle (a cycle of 0.5 seconds as a representative example) in the road-vehicle communication equipment.

The on-vehicle processing device of the AHS vehicle extracts signal information of a traffic signal corresponding to the own vehicle from the broadcasted signal information of the entire intersection based on the lane position of the own vehicle. AHS vehicles that have obtained traffic signal information and road surface condition information from the roadside infrastructure are red based on signal information, road surface condition information, vehicle speed, current position, current position and distance to stop line, etc. Determine whether to ignore the red signal or ignore the signal.

When it is determined that the red light is ignored, the point P2
(This point depends on the speed of the vehicle, road surface conditions, etc.) and alerts the driver (eg, a buzzer). If the driver does not respond, the vehicle-mounted control device controls the vehicle to decelerate to a stop and stop just before the stop line (point P3).

When the AHS vehicle stops, the deceleration stop function ends. The position detection support equipment installed at the point P4 is for service out, and when the vehicle passes this point, the service of the red light ignoring prevention control at this intersection ends.

FIG. 1 is a diagram illustrating a scenario of the red light ignoring prevention control system model shown in FIG. The diagram shown on the right side of FIG.
From the point P1 to the point P4.

FIG. 3 shows one method of determining the negligibility of red light.
This will be described with reference to FIG. In FIG. 3, curves from A1 to AN are speed-one-position curves at which the driver decelerates and stops at a red light, and are functions of the driver's brake operation, vehicle speed, road surface conditions, and the like. These speed-position curves can be calculated by the on-vehicle processor based on the speed of the vehicle, the road surface condition obtained from the roadside infrastructure, and the like.

There is also a method of learning a driving history every time the driver performs a past deceleration stop, and using the learned driving history. In this case, it is assumed that the deceleration curve pattern AN by the driver is a speed-position curve in a case where the driver performs the steepest braking in the past. If the curve is used for red light ignorability determination, the position (point P
If the driver does not decelerate after A), the driver determines that the signal is ignored and the in-vehicle processing device determines.

The curve B is a speed-position curve when the AHS vehicle is decelerated and stopped by the on-board controller. Now, it is assumed that the traffic light is red and the AHS vehicle is running at 80 [Km / h]. The on-vehicle processing device of the AHS vehicle constantly monitors the current speed of the own vehicle and determines whether the vehicle can stop at the stop line before the traffic light. In the case shown in the figure below, when the vehicle passes the point PA, it is determined that the red light can be ignored, and a warning is issued to the driver.

The processing contents of the roadside processing equipment will be described. FIG. 4 shows a time chart of a red light ignoring prevention control system model centered on the roadside processing equipment. The inputs in the red light ignoring prevention control system model are signal information and road surface conditions. As shown in FIG. 4, as for the signal information, the information of the changed color of the signal is obtained by interruption of the signal color change timing signal. The roadside processing equipment stores the signal color change timing time and the signal color in the roadside database.

On the other hand, the road surface condition is 6
Obtain every 0 seconds and save in database. The roadside processing equipment creates information to be sent to the car every 0.5 seconds. The details of the information sent to the car will be described in the input and output of the system.

The processing flow of the roadside processing equipment will be described. The processing flow of the roadside processing equipment for the intersection shown in Fig. 1 is shown in Figs. 5 to 1.6.1-3. FIG. 5 is a processing flow of signal information, which is started by an interruption by a signal color change timing signal, and saves the color of the signal and the time when the signal changes as save data 1. FIG. 6 is a flowchart for processing a road surface condition detected by the road surface condition detection equipment. 6
It is activated every 0 seconds, and saves the road surface condition and time as save data 2. FIG. 7 is a flowchart of a process for creating output data to be sent to the AHS vehicle. The process is started every 0.5 seconds, and the created output data is temporarily stored in the roadside database. The stored output data is transmitted in the form of a broadcast via the road-to-vehicle communication facility.
Sent to HS cars.

As described above, the present invention has an effect that it is possible to prevent a red light from being ignored, which contributes to a reduction in traffic accidents, and is applicable to a temporary stop prevention.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a scenario of the system model of the present invention.

FIG. 3 is an explanatory diagram of a method of determining red light ignorability in the system of the present invention.

FIG. 4 is a time chart of the roadside processing equipment of the system model of the present invention.

FIG. 5 is a processing flow 1 of the roadside processing equipment of the system model of the present invention.

FIG. 6 is a processing flow 2 of the roadside processing equipment.

FIG. 7 is a processing flow 3 of the roadside processing equipment.

FIG. 8 shows data relating to signals of the roadside processing equipment.

FIG. 9 shows input data of the roadside processing equipment.

FIG. 10 shows output data of the roadside processing equipment.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G08G 1/00 G08G 1/00 J (72) Inventor Yoshikazu Oba 1 Toshiba-cho, Fuchu-shi, Tokyo Toshiba Corporation Power and Industrial System Technology Development Center (72) Inventor Toshiaki Tanaka 1 Koga Toshiba-cho, Kawasaki City, Kanagawa Prefecture Toshiba Research and Development Center F-term (reference) 5H180 AA01 CC12 DD07 EE13 FF05 FF25

Claims (1)

[Claims] 1. A road surface condition detecting means for detecting a road surface condition such as freezing or wetness, an interface means for a traffic signal, and information on a road surface condition detected by the road condition detecting device and a traffic signal obtained by the interface device are inputted. Roadside processing means for generating data to be output to the vehicle; roadside road-to-vehicle communication means for transmitting the output data generated by the roadside processing means to the vehicle; and the vehicle grasping the absolute position and relative position of the running vehicle. Position detection support means installed on the road so as to be provided; own vehicle position detection means provided on the vehicle side and detecting the information each time a vehicle passes through the position detection support means installed on the road; A vehicle-side road-to-vehicle communication unit that obtains data communicated from the road-to-vehicle communication unit, a host vehicle state detecting unit that detects the speed of the host vehicle, and the host vehicle position detecting unit. On-vehicle processing means for determining whether or not the own vehicle ignores the red signal based on the detected information, the information obtained by the road-to-vehicle communication means, and the information detected by the own vehicle state detecting means; A vehicle human interface unit for exchanging information with the driver, and when the on-vehicle processing unit of the own vehicle determines that there is a possibility of ignoring the red signal, the vehicle human interface unit controls the driver. A red light ignoring prevention control system characterized by issuing a warning to ignore the red light and decelerating and stopping the own vehicle via the on-vehicle control means.