JPH082285A - Traffic signal-interlocked vehicle speed control device - Google Patents

Abstract

PURPOSE:To prevent accidents in and around an intersection which occupy most traffic accidents. CONSTITUTION:A situation in an intersection is grasped preliminarily by an intersection control device 1 which is interlocked with a traffic signal 2. Simultaneously, the information is transmitted wirelessly from a wireless transmission device 3, this wireless signal is received by a wireless signal receiving device 4, and a traveling condition in the intersection is determined by a vehicle speed control device in accordance with a speed obtained by a speed detection device 6. As a result, a fuel control signal to a fuel control device 7 is generated to decrease the speed, or a vehicle is forcedly speed-reduced or stopped by a speed reducing device 8, thereby traveling of the vehicles maily including automobiles in and around the intersection can be controlled preliminarily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traffic light interlocking type vehicle speed control device, and more particularly to a traffic light interlocking type vehicle speed control device based on the interlocking relation between the contents of the display of the traffic light and the speed of the vehicle.

[0002]

2. Description of the Related Art Conventionally, a device relating to constant speed traveling of this kind has been used for the purpose of preventing runaway driving of a violating vehicle while traveling and preventing a rear-end collision due to excessive speed. For example, as disclosed in Japanese Unexamined Patent Publication No. 4-225500, the vehicle speed is automatically controlled according to the legal speed of the road read from the maximum speed display plate of the road.

[0003]

In this conventional device relating to constant speed running, only speed control to within the legal speed can be controlled, so that it is irrelevant to road conditions, especially in intersections that account for most traffic accidents, and It is usually not applicable to accident prevention devices in the vicinity. As a result, the safety measures that are a part of the causes of traffic accidents are limited, but as for measures against accidents inside and near intersections,
It was still unresolved.

[0004]

A traffic light interlocking type vehicle speed control device of the present invention is an intersection control device which operates in conjunction with a traffic light, a wireless transmission device which wirelessly transmits operation information of the traffic light, and the wireless communication device. A wireless receiving device that receives information about the traffic light transmitted from a transmitting device, a vehicle speed control device that controls traveling of the vehicle, a speed detection device that detects traveling speed, and a fuel control device that controls fuel supply. And a speed reducer for forcibly decelerating the vehicle, a timer circuit that inputs a clock pulse signal from an oscillator and generates a luminescence signal at regular intervals, and calculates an elapsed time from the time when the luminescence signal is generated. The elapsed time calculator, the remaining time calculator that calculates the time from the generation of the emission signal to the generation of the next exertion signal, and the information generated by the intersection control device are temporarily stored. A storage unit, the vehicle speed detector and D
-A vehicle speed calculation circuit for calculating a traveling condition in an intersection by inputting a speed signal obtained by a speed detection device including an A converter and information of the storage device, and a vehicle according to an output of the vehicle speed calculation circuit. It is configured to include a fuel control circuit and a brake control circuit that increase and decrease the speed.

[0005]

The present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing an outline of one embodiment of the present invention. Referring to FIG. 1, a first embodiment of the present invention transmits an intersection control device 1 operated by program control, a traffic signal 2, and an intra-intersection running condition obtained by the intersection control device 1 by radio waves. A wireless transmission device 3, a wireless reception device 4 for receiving the radio wave thereof, a vehicle speed control device 5 for controlling the traveling speed of the own vehicle by program control,
It is composed of a speed detection device 6 that detects the traveling speed of the host vehicle, a fuel control device 7 that controls the supply of fuel, and a speed reduction device 8 that forcibly decelerates the vehicle.

FIG. 2 is a block diagram showing an embodiment of the intersection control device 1, the traffic signal 2, and the wireless transmission device 3. Referring to FIG. 2, as the configuration of the intersection control device 1, a transmitter 10 that generates a signal at regular intervals, a timer circuit 9 that generates a luminescence signal based on the signal, and a luminescence signal that generates a luminescence signal. It comprises an elapsed time calculator 11 for calculating the elapsed time from and a remaining time calculator 12 for calculating the time until the next bright signal is generated. In addition, the wireless transmission device 3
Is composed of a modulation circuit 13 and a transmitter 14 for modulating the information obtained by the remaining time calculator 12 to a radio frequency.

FIG. 3 is a block diagram showing an embodiment of the radio receiver 4, the vehicle speed controller 5, the speed detector 6, the fuel controller 7, and the speed reducer 8. Referring to FIG. 3, the wireless reception device 4 includes a wireless receiver 15 and a wireless reception circuit 16 for receiving a wireless signal transmitted by the wireless transmission device 3. The configuration of the vehicle speed control device 5 is a storage device 1 for temporarily storing information received by the wireless reception device.
7, a vehicle speed calculation circuit 18 for calculating the traveling speed in the intersection based on the information in the memory 17 and the traveling speed of the own vehicle, or a deceleration signal for stopping at the intersection, and a vehicle speed calculation circuit 18. It comprises a fuel suppression circuit 19 for transmitting the generated signal to the fuel control device 7, and a brake control circuit 20 for transmitting the signal generated by the vehicle speed calculation circuit 18 to the speed reducer 8. The configuration of the speed detection device 6 includes a vehicle speed detector 22 that detects a traveling speed as a pulse signal by a pulse generator, and a D signal that digitizes the pulse signal.
-A converter 21. The configuration of the fuel control device 7 is
A main controller 23 that controls the fuel supply conditions according to instructions from the fuel suppression circuit 19 and the access 25;
It comprises a fuel supply device 24. The configuration of the speed reducer 8 is a hydraulic control device 26 that controls the hydraulic pressure for forcibly decelerating according to the deceleration signal generated by the brake control circuit 20.
And brake 27.

Next, the operation of this embodiment will be described with reference to FIGS. 2, 3 and 4. In this embodiment, the time required for the traffic light 2 to change from blue to yellow is t1, the time required to change from yellow to red is t2, the time required to change from red to blue is t3, and the total time of t1 + t2 + t3 is T. . It is also assumed that the intersection cannot be entered after the traffic light 2 turns red.

When the traffic light 2 turns blue, the set time of the elapsed time calculator 11 is set to 0 and the time (T-t3) is set to the remaining time calculator 12. Oscillator 10 from the next moment
The elapsed time calculator 11 starts measuring the clock pulse by the signal output from and calculates the elapsed time. The remaining time calculator 12 can calculate the remaining time until the traffic light 2 turns red by further subtracting the time of the elapsed time calculator 11 from the time previously calculated. The remaining time is wirelessly transmitted to the running vehicle by the wireless transmission device 3. The transmitted wireless signal is received by the wireless receiving device 4 mounted on the vehicle, and the content thereof is temporarily stored in the storage device 17. At the same time, the traveling speed is detected by the speed detecting device 6. Memory 17 and DA
Based on the information from the converter 21, the vehicle speed calculation circuit 18 calculates a condition for safely traveling at the intersection.

Therefore, referring to FIG. 4, when there is time to safely drive at the intersection as shown in FIG. 4A, for example, as shown in FIG. If the vehicle travels between intersections at various speeds (for example, 30 km / h), even if the traveling speed is too high as shown in (b) of FIG. 4 (A), The driving conditions are calculated so that In addition, when it is necessary to stop at an intersection as shown in FIG. 4B, a traveling condition that results in (c) of FIG. 4B is calculated. FIG. 4
When it is necessary to stop at an intersection as in (B),
As shown in (C) of (B), if the speed is gradually reduced and the person walking on the pedestrian crossing stops safely,
Even if the traveling speed is too high as shown in (d) of (B), the traveling condition such as that shown in Fig. 4 (B of (c) is calculated. With the traveling condition calculated by the vehicle speed calculation circuit 18, ,
For example, when decelerating by engine braking, a signal is sent from the fuel suppression circuit 19 to the fuel control device 7. When it is necessary to forcibly reduce the traveling speed, a signal is sent from the brake control circuit 20 to the brake 27 of the speed reducer 8 to apply the brake to decelerate or stop the vehicle.

[0011]

As described above, according to the present invention, since it is possible to know the driving conditions in an intersection in advance by interlocking with a traffic signal, it is possible to reliably prevent runaway driving in an intersection, excessive speed, and excessive driving. it can. As a result, it is possible to significantly reduce the occurrence of accidents in and near intersections, which account for the majority of traffic accidents. Therefore, when the traffic light interlocking type vehicle speed control device according to the present invention is combined with the above-mentioned constant speed traveling device, there is an effect that a more effective safe traveling control system for an automobile can be realized.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an outline of an embodiment of the present invention.

FIG. 2 is a block diagram showing configurations of an intersection control device 1 and a wireless transmission device 3 shown in FIG.

3 is a block diagram showing configurations of a wireless reception device 4 and a vehicle speed control device 5 shown in FIG.

4A and 4B are graphs showing traveling conditions within the intersection shown in FIG. 1, where FIG. 4A shows a case where the vehicle can travel at the intersection and FIG. 4B shows a case where the vehicle stops at the intersection.

[Explanation of symbols]

 1 intersection control device 2 traffic light 3 wireless transmission device 4 wireless reception device 5 vehicle speed control device

Claims (2)

[Claims] 1. An intersection control device that operates in conjunction with a traffic light, a wireless transmission device that wirelessly transmits operation information of the traffic light, and a wireless reception device that receives the information of the traffic light transmitted from the wireless transmission device. A vehicle speed control device for controlling traveling of the vehicle, a speed detection device for detecting traveling speed, a fuel control device for controlling fuel supply, a speed reducer for forcibly decelerating the vehicle, and an oscillator A timer circuit that inputs a clock pulse signal to generate a luminescence signal at regular intervals, an elapsed time calculator that calculates an elapsed time from the time when the luminescence signal is generated,
A remaining time calculator for calculating the time from the generation of the emission signal to the generation of the next exertion signal, a storage device for temporarily storing information generated by the intersection control device, and the vehicle speed detector According to the output of the vehicle speed calculation circuit, which inputs the speed signal obtained by the speed detection device including the D / A converter and the information of the storage device to calculate the traveling condition in the intersection, A traffic signal interlocking type vehicle speed control device comprising a fuel control circuit and a brake control circuit for increasing or decreasing the vehicle speed. 2. A traffic signal interlocking type vehicle speed control device, wherein the wireless transmission device and the traffic signal device are mounted on the same support.