JPS63176000A - Control of traffic signal - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a method for controlling traffic signals, that is, signals for motorways. In addition to installing fire detectors, a traffic light and multiple variable signs are placed at predetermined intervals from the tunnel entrance in the direction of vehicle arrival, and a sign placed farthest from the tunnel entrance detects the arrival of vehicles. A speed detector is installed to detect the speed of vehicles traveling toward the tunnel entrance.
When a fire occurs due to a car accident such as a collision in a tunnel, and the fire detector is activated, the controller first switches the above traffic light from "green" to "red" and detects the traffic light detected by the speed detector. The system is characterized in that the variable sign is controlled based on the traveling speed to gradually reduce the speed of the vehicle traveling toward the tunnel entrance and stop it before the traffic light.

[Conventional technology]

Traditionally, fire detectors have been installed inside tunnels, and when a fire detector is activated, a traffic light installed near the entrance of the tunnel is activated.
There is a device that switches from "π" to "red" to stop a car running towards the tunnel entrance before the tunnel entrance.

[Problem that the invention seeks to solve]

In the conventional method, the traffic light only suddenly changes from ``green'' to ``red,'' which is extremely dangerous for cars traveling at speeds of about 100 km/h and their drivers. This invention has been made to improve these problems.

[Means for solving problems]

A traffic light that can be switched between "green" and "red" is installed near the tunnel entrance, and multiple variable signs are placed at predetermined intervals from the traffic light in the direction of vehicle arrival. A speed sensor was installed at a position a predetermined distance from the sign installed at the position toward the direction of arrival of the vehicle.

[Effect]

If a fire detector in the tunnel is activated, the controller will change the above traffic light from RFJ to "Y" and change the sign based on the regular speed of the vehicle measured by the speed sensor. In addition to changing the speed limit to an appropriate speed limit to gradually slow down vehicles, the system also flashes signs to alert drivers, and gradually reduces the speed of vehicles approaching the tunnel entrance. It was made to stop before the traffic light installed near the population of the tunnel.

〔Example〕

In Figure 1, +11 is an automatic single-purpose crawler M, +21 is a tunnel, (31 is a fire detector installed in the tunnel and sensitive to heat or smoke, and here one is shown for convenience, but the length of the tunnel is It goes without saying that in some cases, two or more detectors are provided at a predetermined interval.+41 receives a detection signal from the above-mentioned fire detector and a speed detection signal from the speed detector described later, and controls the traffic lights and signs described later. It's a vessel.

For example, it is mainly composed of functional elements such as a microcomputer that have arithmetic and control functions.

FS is a flashing signal (flicker signal) generator in the controller (41) that flashes a sign (described later).The sign is activated by a flashing signal after the fire detector detects a fire and a predetermined sign is displayed. Flashing.

(51 is a traffic light installed at the entrance of the tunnel (21), located 111 points away from 62 in the direction of arrival of the car, and (7) is a traffic light (installed at a position 12 points away from 51 in the direction of arrival of the car. The first variable sign indicates the speed limit.

(81 is a second sign installed at a position 13 away from the first sign (7) in the direction of arrival of the car.
l+, 12. What is the relationship between 1s! Not limited to the relationship +=lh=ls, it <A! z (I5. or l
It is determined by the road condition, one round concave environment, etc., such as the relationship + = 72 < is. S is a speed detector placed at a predetermined distance from the second sign (8) in the direction of arrival of the vehicle.

An example would be something like a radar speedometer. This detector is equipped with a controller (41
connected to. (9: is a car moving in the direction of the arrow.

If there is no abnormality in this configuration, please check the traffic light (51
is always “blue”, and the first sign (7) and the second sign
The sign (8) indicates the maximum speed on the motorway (e.g. 10
Show G tan/h or yokm/h) and L text. Under these conditions, if a fire breaks out in the tunnel, the fire detector (3) will be activated.

A sensing signal is given to the controller (41).Thereby, the controller (41 outputs a control signal αG and sets the signal wall (51 to "blue").
to "red".

On the other hand, the signs (7) and (81) are controlled according to the speed of the car detected by the speed detector S, and the second sign (8) is controlled according to the speed of the car (
9), and the first sign (7) is displayed at a speed that is even more dazzling than the second sign. And the first. The second indicators f7) and +8) flash by a common flicker signal.

In this way, the speed of the car is gradually reduced and the traffic light (
Stop before 51.

In addition, to do this, 12. Needless to say, the distance h must take into account the braking distance of the vehicle and must be sufficient to cope with the drop in speed.

Next, the first. The second sign (71, (81 configuration example)
This will be explained using FIGS. 3, 3, and 4. Figure 2 shows an example of the structure of a sign, and C11) is a front panel made of opaque sheet glass or plastic except for the dot α2 (transparent or translucent), which is the minimum unit for display characters, etc. , C13 is a round bar-shaped light guide which one or more of them form one dot.

It is made of transparent plastic and is flexible enough to accommodate transparent or translucent square dots. Note that the dot a'a constitutes the minimum unit of a character symbol or a figure (picture), which will be described later. One end of the light guide is fixed to the dot 0 part of the front plate αυ, and the other part is located at the light generating device xt-ao.

That is, the two-light generating device I is composed of a light source (for example, an l-logen lamp) a and a reflector (RKFIJCTOR) (lG) that reflects the light emitted from the light source haze, and the other end of the light guide αj is located at the focal point of the reflector tte. Therefore, when the light source α3 is turned on by the power from the power source (171), the light source enters from the other end of the light guide [3 and reaches one end side.

FIG. 3 is an example of a case where necessary markings are made based on the configuration shown in FIG. 2, and in reality, speed, that is, numbers are displayed. Figure 4 shows a sign constructed as shown in Figures 2 and 3, with a means for changing the sign added, and the housing is a front plate.

(13-1) to (13-(1) are light guides, (14) is a light generator, αS is a light source, αe is a reflector, αη is a power source,
(1B-1) (18-n) are original switches, which are provided in the middle of each of the semiconductors (18-1) to (18-n) and are selectively controlled by the selection circuit a3. (
Reference numeral 41 denotes a controller, and the selection circuit a9 selectively controls the source switch according to a signal generated from the controller (41 when a fire is detected). The signal is applied to the power supply αD to control the ON/OFF of the power supply system.

Therefore, if a fire in the tunnel is detected and a signal is given from the controller +41 to the selection circuit σ9 and a flicker signal is generated, the sign flashes while displaying the predetermined speed limit.

Note that the posted speed limit is different between the first sign and the second sign, and the speed posted on the first sign is slower than the speed posted on the second sign. In other words, the system takes into consideration the braking distance of the vehicle, decelerates the vehicle in stages and stops before the traffic light, and the system flashes to attract the driver's attention.

〔Effect of the invention〕

Since this invention is as described above, if a fire breaks out in a tunnel, the speed of a car traveling towards the tunnel entrance can be reduced in stages and stopped before the tunnel entrance. I can do it.

This can prevent the accident from spreading.

In the embodiment, a round bar-shaped semiconductor made of transparent plastic was used as an example, but it goes without saying that this may be replaced with the original fiber.

By the way, a sign like the one in the example uses a commonly used light source and a display mask. This eliminates the phenomenon in which the mask surface looks as if it is lit due to the reflection of sunlight, making it an extremely easy-to-see sign for drivers and others.

[Brief explanation of the drawing]

Fig. 1 is a diagram for explaining the signal 1fflJ control method according to the present invention, and Figs. 2 to 4 are diagrams showing examples of signs used in the present invention. Tunnel, (31 is the fire detector, (4I is the controller, (51 is the traffic light, (6) is the tunnel entrance, (7) is the first sign, (8) is the second sign, (9) is Car, +1 (I is a control signal, 03 is a light guide, I is a light generating device, [15 is a light source, any e is a reflector, ■ is a power supply, α・ is the original switch, (1
9 is a selection circuit, S is a continuity detector, and FS is a blinking signal generator. It should be noted that the same or equivalent parts in FIG. 0 are denoted by the same reference numerals.

Claims (1)

[Claims] In addition to installing fire detectors in the tunnels of expressways, a traffic light that can switch between "green" and "red" is installed at a predetermined distance from the entrance of the tunnel in the direction of vehicle arrival, and a designated traffic light is installed from the traffic light. A plurality of speed limit signs with switchable and flashing signs are placed at predetermined intervals in the direction in which the vehicle is coming from, and furthermore, the sign located farthest from the traffic light indicates that the vehicle is approaching. A vehicle speed detector is placed at a predetermined distance in the direction of arrival, and when the fire detector activates in response to smoke or heat, the controller changes the traffic light from "green" to "red."'', and based on the speed of the vehicle traveling toward the tunnel entrance detected by the speed detector, the sign located furthest from the tunnel entrance will be changed to the direction of the vehicle on the motorway. The speed limit is changed to a speed limit lower than the maximum speed of , and that all of the above-mentioned signs were made to flash by the action of the controller, so that the speed of the vehicle traveling towards the tunnel entrance was gradually reduced until it came to a stop in front of the above-mentioned traffic light. Characteristic traffic signal control method.