JPS63308700A - Control method for traffic signal - Google Patents

Abstract

PURPOSE:To stepwise decrease a speed of an automobile, and to prevent the expansion of an accident by placing plural display variable, speed limit markers at prescribed intervals toward the arrival direction of the automobile at the entrance of a tunnel. CONSTITUTION:When a fire sensor operates and a sensing signal is sent to a controller 4, the controller 4 outputs a control signal 10 and changes a signal to red, and also, and a display of a speed limit display use marker 7 whose display can be switched, and a display of a marker 8 are set to, for instance, 30km/h, and 50km/h, respectively, and flickered by a flickering signal generating part FS. Also, in the vicinity of the marker 8 being in the most distance position from an entrance 6 of a tunnel, or a little in the arrival direction of a vehicle 9, an indicator 20 for informing a fact that a fire is generated in the tunnel is installed, and the generation of a fire is displayed by a control of the controller 4, and flickered by the flickering signal generating part FS.

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, one traffic light, multiple Q-variable signs, and one indicator will be placed at predetermined intervals from the tunnel entrance in the direction of vehicle arrival to prevent fires caused by vehicle accidents such as collisions within the tunnel. If a fire occurs and the fire detector is activated, the controller will switch the traffic light from "green" to "red," and the 4-sei sign placed in the direction of the vehicle from the traffic light will be placed on the motorway. A car driving toward the tunnel entrance changes its speed to the specified speed limit, which is lower than the maximum speed of The point t-characteristic is that the speed of the vehicle is reduced in stages and the vehicle is stopped before the traffic light.

[Conventional technology]

Conventionally, a fire detector is installed inside the tunnel, and when the fire detector is activated, the traffic light installed near the tunnel entrance is switched from "green" to "red" and the train runs toward the tunnel entrance. There is one that makes the car stop just before the tunnel entrance.

[4 points while the invention is trying to solve the problem] In the conventional method, the traffic light changes suddenly from "T" to "red", so the car traveling at a speed of about 1 o o b/h and the driver driving it It is extremely dangerous for This invention has been made to improve these problems.

[Means for solving problems]

A traffic light that can be switched between "green" and "red" will be installed near the entrance of the tunnel, and multiple four-signal signs that can change their markings from the traffic light toward the direction of arrival of vehicles will be rearranged at predetermined intervals. Mayu installed an indicator near the sign farthest from the entrance, closer to the direction of traffic than the sign.

When the fire detector in the tunnel is activated, the above-mentioned traffic light, +S Makoto, and display are controlled by the controller.

[Effect]

If the fire detector is activated, the controller will switch the traffic light to its normal state, that is, from "green" to "red" and
The display will indicate that a fire has broken out in the tunnel.
Furthermore, a speed limit sign will be posted on the sign, so that the speed of cars traveling toward the tunnel entrance will be reduced in stages so that the table will stop before the traffic light. In addition, to draw the driver's attention to the sign, the speed limit will be flashed and the 2 display will also flash.

〔Example〕

In Figure 1, #2 is a motorway, (2) is a tunnel, and (3) is a fire detector that is installed inside the tunnel and is sensitive to heat or smoke. Only one is shown here for convenience. However, it goes without saying that depending on the length of the tunnel, two or more fire detectors may be installed at a certain distance.(4) receives the detection signal from the fire detector and controls the traffic lights, signs, and indicators described later. system (Ill device and 2
For example, it is mainly composed of functional elements of a microcomputer with advanced calculation and control functions. F8 is a blinking signal (flicker signal) generating section in the control na f41.

Blink the signs and indicators described later (for example, at a cycle of 1z)
After the fire detector detects a fire and a predetermined sign is displayed, the 4-sei indicator flashes using a flashing signal. (5) is 1 from the entrance (6) of the tunnel (2)
The first variable sign (7) is located 12 points away from traffic light (5) in the direction of arrival of the vehicle, and indicates the speed limit. mark. (8) is a second sign installed at a position 13 away from the first sign (7) in the direction of arrival of the vehicle.

Naori 11m 12m 15 relationship is 11-z2w
It is determined by the road condition 9 surrounding environment, etc., limited to the relationship t5 /1 < 12 < 15 # or the relationship 71 - /2 < Is. (1) is the second mark m t8
), or even closer to the direction of the vehicle's arrival, to notify the driver of the occurrence of a fire. The second display should preferably be one that is easily visible both day and night, such as an electric dot display.

(9) is a car traveling in the direction of the arrow.

In such a configuration, if there is no abnormality, the traffic light (5
) is always marked as "Iku", and the first sign (7) and second sign (8) are the maximum speed of the motorway (for example, 1
00Az/h or 70Az/h). Under these conditions, if a fire breaks out in the tunnel (2), the fire detector will be activated.

A sensing signal is provided to a controller (4).

Thereby, the controller (4) outputs a control signal σQ.

Switch the traffic light (5) from "f" to "red" and change the signs fJ & (71 and (8), and change the sign 9
A display as shown in Figure 5 is displayed on the display to alert the driver. That is, the control signal - turns the traffic light (5) red, and the first +s a
(N speed sign is, for example, 30Aa*/h, second (l sense (8) speed sign is, for example, 50/cat/h, and 9 flashing signal generator FSX>4 causes a flashing signal (7 power signal) The vehicle is made to flash along with the indicator (7).More specifically, the speed of the vehicle is reduced step by step before the signal +* (51).

It goes without saying that in order to do this, the distances C2 and C5 must take into consideration the braking distance of the vehicle and must be sufficient to cope with the speed drop.

Next, the first. 2nd m t71. The configuration example of C8) is shown in the second example.
figure.

This will be explained using FIGS. 3 and 4. Figure 2 shows an example of the structure of a sign. ,
The α field is a round rod-shaped light guide that forms one or more dots, and is made of transparent plastic and has flexibility, and can be adapted to correspond to each transparent or translucent dot. be. In addition, the dot α is a character symbol that will be explained later.

Or it forms the smallest unit of a figure (picture). One end of the light guide is fixed to the dot a'aco portion of the front plate aυ, and the other end is located at the light generating device dttJ4.

That is, the light generating device a◆ is composed of a light source (for example, a halogen lamp) C1!9, and a reflector (RIliiFLBCTOR) [6] that reflects the light emitted from the light source C1! The other end of the light guide a3 is located at the focal point of the reflector 4. Therefore, when the light source is turned on by the force from 11η, the light enters from the other end of the light guide a3 and reaches one end.

Figure 1g3 is an example of a case where required markings are made based on the configuration shown in Figure 2, and in reality, speed, ie, numbers, are displayed. Fig. 4 shows a sign constructed as shown in Figs. 2 and 3 with a means for changing the sign added, and Q]) is a front plate.

(1S-1) to (15-n) are light guides, αX is a light generator, aS is a light source, ul is a reflector, (171 is a power supply, (18-1) to (f8-n) are optical switches The selection circuit (II) provided in each of the light guides (13-1) to (13-n) selectively controls the selection by nine individual selection circuits (II). (4) is a controller; The signal generated from 4) when a fire is detected causes the selection circuit (
Reference numeral 11 selectively controls the optical switch. Also control 141
The 7-bit power signal generated from the flashing signal generating section F8 of the display device (4) is applied to -stgaη, and turns on and off the power source aη and the display device (1).

Therefore, if a fire in the tunnel is detected and a signal is given to the selection circuit from the controller (4) and a signal is generated, the sign will display the predetermined speed limit and the indicator (
(to) blinks while displaying, for example, as shown in FIG.

What? 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 account the braking distance of the vehicle, slows the vehicle down in stages, and displays signs to stop the vehicle before the traffic light, and also flashes to attract the driver's attention.

〔Effect of the invention〕

This invention is as described above, so if a fire breaks out in a tunnel, it notifies the driver of a car traveling toward the entrance of the tunnel that a fire has broken out in the tunnel, and also controls the speed of the car. It can be lowered in stages and stopped before the tunnel entrance, thereby preventing the accident from escalating.

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

By the way, as shown in the example, [Makoto] presents an illusion that tends to occur with signs that use a commonly used light source and 1 display mask (2, but the light source does not turn on under bright sunlight with conventional signs). This eliminates the phenomenon in which it appears as though the lights are on due to the reflection of sunlight on the surface of the display mask even though they are not, making the signs extremely easy to see for drivers and others.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining the signal control method according to the present invention, FIGS. 2 to 4 are diagrams showing an example of a sign used in this invention, and FIG. 5 is a diagram showing an example displayed on a display. 6 in figure
5,111 is a road, (2) is a tunnel, (3) is a fire detector, (4) is a controller, and (5) is a traffic light. (6) is the tunnel entrance, (7) is the first sign, (8)
is the second +s weave, (9) is the car, (1 (I is the control signal,
(I3 is the light guide, Q41 is the light generator, Buddha l is the light source,
αQ is a reflector, αη is a light switch, α9 is a selection circuit, @ is a display, and F8 is a flashing signal generator. Note that in FIG. 1, the same or corresponding parts are designated by the same reference numerals.

Claims (2)

[Claims] (1) In addition to installing fire detectors in the tunnels of motorways, install traffic lights that can switch between ``green'' and ``red'' at a predetermined distance from the entrance of the tunnel in the direction of vehicle arrival; A plurality of speed limit signs that can be switched in the direction in which the vehicle is coming are placed at a specified distance from the traffic light, and also near the sign that is placed furthest from the tunnel entrance. Alternatively, an indicator will be installed closer to the direction of the vehicle than the sign to notify the driver if a fire breaks out in the tunnel, and if the fire detector is activated in response to smoke or heat, the controller will As a result of the action, the above traffic light is switched from "green" to "red" and the above display indicates that a fire has broken out in the tunnel, and the sign furthest from the tunnel entrance is changed to indicate that a fire has occurred in the tunnel. The speed limit is changed to a lower speed limit than the maximum speed of the tunnel, and the other signs located between this sign and the traffic light are changed to a speed limit lower than that of the sign located furthest from the tunnel entrance. A traffic signal control method, characterized in that the speed of a vehicle traveling toward a tunnel entrance is reduced in stages and stopped before the traffic light. (2) After switching all the signs placed in the direction from the entrance of the tunnel to the speed limit that requires cars to stop before the traffic light, and after a fire occurs, the above indicator will blink at a predetermined period. A traffic signal control method according to claim (1), characterized in that: