JPS63266597A - Control method for traffic control signal - Google Patents

Abstract

PURPOSE:To prevent an accident from expanding by making a display on a display device when a fire takes place in a tunnel or an earthquake larger than specific intensity occurs, and reducing the speed of a vehicle which travels toward the entrance of the tunnel stepwise and stopping it is front of the entrance. CONSTITUTION:If the fire takes place in the tunnel or if the earth-quake occurs and its intensity is larger than the specific value, a fire sensor 3 or earthquake sensor ES supplies a sense signal to a controller 4. Consequently, the controller 10 outputs a control signal 10 to display that on the display device. Further, a signal 5 is turned from 'blue' to 'red' and 1st and 2nd indicators 7 and 8 are controlled. Consequently, the speed of the vehicle is reduced stepwise and the vehicle is stopped at the signal.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a control method for traffic signals, that is, road signals. In addition to installing seismic motion sensors in or near the tunnel, traffic lights, variable signs, and indicators are installed at predetermined intervals from the entrance of the tunnel toward the direction of vehicle arrival. If an earthquake occurs and the fire detector is activated, or if an earthquake occurs and the seismic intensity of the seismic motion detected by the above ground sensor is greater than the predetermined seismic intensity, it will be displayed on the above display. The system is characterized by making it visible to the driver and controlling the traffic lights and variable signs mentioned above to prohibit vehicles from entering the tunnel.

[Conventional technology]

Traditionally, fire alarms have been installed inside tunnels, and an alarm is issued when the fire detector is activated.

[Problem that the invention seeks to solve]

When a fire is detected, it is necessary to stop the car while it is running, but if it is not stopped smoothly, a collision can occur, which is extremely dangerous.

This invention attempts to control vehicles traveling towards the entrance of a tunnel in the case of earthquake detection as well as fire detection.

[Means for solving problems]

Fire detectors are installed inside the tunnels of motorways, and earthquake sensors are installed near the tunnels, as well as one traffic light and multiple variable signs from the entrance of the tunnel in the direction of vehicle arrival, and warning signs in the event of an earthquake or fire. A display was installed to display the tunnel, and traffic lights and signs were used to control vehicles driving toward the tunnel.

[Effect]

When a fire detector or earthquake sensor is activated, the display will indicate the occurrence of an earthquake or fire.

Switch the traffic light from "green" to "red" and change the variable sign display to a speed sign that gradually reduces the speed of the car, and then stop the car at the traffic light. let

〔Example〕

In Figure 1, (1) is a motorway, (2) is a tunnel, and (3) is a fire detector that is installed inside the tunnel and is sensitive to smoke or heat. Only one is shown here. , it goes without saying that two or more are provided at predetermined intervals depending on the length of the tunnel.

BS is an earthquake sensor installed in or near the tunnel, and (4) is a controller that is connected to the fire detector and seismic motion sensor and controls the traffic lights, signs 2, and indicators described later. It is mainly composed of functional elements with such calculation and control functions. (5) is a traffic light installed a distance 11 away from the entrance (6) of the tunnel (2) in the direction of arrival of the car, and (7) is a traffic light installed at a distance t2 away from the traffic light (5) in the direction of arrival of the car. The speed limit is variably displayed on the first variable sign installed in the area.

(8) is a second variable sign installed at a position 15 away from the sign (7) in the direction of arrival of the table.

In addition, I! + = j + 2 = 15 I!
1 < 12 (l! 3. or t1 = t2 < is, etc. It is determined by various road conditions such as straight roads, curves, or one place where there is a crosswind warning. 9 Determined by the surrounding environment. ■ is a fire in a tunnel or an earthquake If this occurs, Figure 5 (
An indicator like that shown in a) or (b) is recommended to inform the driver, but a dot-type electric indicator is recommended to make it visible regardless of day or night. (9) is a car traveling in the direction of the arrow.

Incidentally, F8 is a blinking signal (7-light power signal) generating section in the controller (4), and both the sign and the two indicators are blinked by the blinking signal.

If you have this configuration and there is no abnormality, that is,
If there is no fire or earthquake, traffic lights (5)
is always marked as ``evening'', and markers a ("t> and (8) are marked as the maximum speed of the road (for example, 100/cm/h). In such conditions, if a fire breaks out in the tunnel Or, if an earthquake occurs and its seismic intensity is greater than the prescribed S motion.

A sensing signal is given from the fire detector (3) or the earthquake sensor 18 to the controller (4).

The controller (4) thereby outputs a control signal 4.

A display as shown in FIG. 5(a) or (b) is displayed on the display.

Furthermore, the traffic light (5) is switched from "green" to "red" and the first. Control the second markers (7) and (8).

Next, an example of the configuration of the markers (71, +81) will be explained using FIGS. 2, 3, and 4.

Figure 2 shows an example of the structure of a sign, where αυ is a front plate made of plate glass or plastic that is opaque except for the dots (transparent or opaque) that are the minimum units for display characters, etc.; The 0th floor is a round rod-shaped light guide in which one or more dots are formed, and it is made of transparent plastic and has flexibility, and can be adapted to each transparent or translucent dot a. be. Note that the dots constitute the minimum unit of character symbols or figures (pictures) to be described later. One end of the light guide is connected to the front plate (1
1) is fixed to the dot α part, and the other end is the light generating fc
It is located in Oki σ spit.

That is, the light generating device 0 is composed of a light source (for example, a logen lamp) 9 and a reflector (REFLECTOR) that reflects the light emitted from this light source. The other end is located at the focal point of the reflector member.

Therefore, the light source α is
When 9 is lit, the light enters from the other end of the light guide α row and reaches one end.

FIG. 3 is an example of a case where necessary markings are made based on the configuration shown in FIG. 2, and in reality, the speed, that is, the number, is displayed.

Figure 4 shows a sign configured as shown in Figures 2 and 3, with a means for changing the sign added, where the housing is the front plate, and (15-1) to (13-n) are the lights. conductor.

α4 is the light generator, (to) is the light source, Q is the reflector, αn
is a power source, (1a-1) to (18-n) are optical switches, and the respective light guides (1!1-1) to (13-
The nine individual selection circuits provided in the middle of (n) are selectively controlled by the following.

(4) is a controller, and the selection circuit α value selectively controls the optical switch according to a signal generated from the controller (4) when a fire or an earthquake is detected.

Further, a flicker signal generated from the blinking signal generator FS of the controller (4) is applied to the power source η and the display unit .

Controls ON/OFF of both the power supply aη and the display (to).

Therefore, if the controller (4) outputs a control signal to change the speed indicator when a fire or earthquake is detected, 1
The selection circuit al selects redundant optical switches in advance, 2 displays a speed lower than the normal speed indicator, and 1 blinks together with the display. Therefore, the changed speed limits can be displayed on signs (7) and (81).

〔Effect of the invention〕

In this invention, if a fire breaks out in the tunnel or an earthquake occurs and the seismic intensity exceeds a predetermined seismic intensity, this invention is displayed on the display, and a message is sent to the entrance of the tunnel. It is possible to reduce the speed of an oncoming vehicle in stages according to the instructions of the sign and stop it before the entrance of the tunnel, thereby preventing the spread of the accident.

Incidentally, in the above embodiment, a nine-shaped light guide made of transparent plastic was used as an example.

It goes without saying that this may be replaced with an optical fiber.

By the way, as in the embodiment, the light guide and the light source.

Signs that combine reflectors consume less power than signs that use conventionally commonly used light sources and sign masks (representing the shape of displayed characters, etc.), and can be used even when the light source is not energized. It is possible to eliminate the illusory image that tends to occur (a phenomenon in which the light source appears to be lit due to the reflection of sunlight on the display mask surface, even though the light source is not lit under bright sunlight, as with conventional signs). I can do it,
This is an extremely easy-to-see sign for drivers and others.

[Brief explanation of the drawing]

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 the invention, and Fig. 5 is a diagram showing an example of a display on a display. Ah, 9.
u+ is a road, (2) is a tunnel, (3) is a fire sensor,
(4) is the controller, (5) is the traffic light, (6) is the tunnel population, (71, (81 is the sign, (9) is the car, al is the control signal, αυ is the front ml board, σ2 is the dot, Q3 is a light guide, 14) is a light generator, u5 is a light source, ue is a reflector, (17+ is a power supply, eel is a light switch, α value is a selection circuit, CA is a display, E8 is
is an earthquake sensor, and FB is a flashing signal generator. Note that the same or corresponding parts in the two figures are designated by the same reference numerals.

Claims (2)

[Claims] (1) A fire detector is installed inside the tunnel of the expressway, and an earthquake sensor is installed near the tunnel, and a switch between ``blue'' and ``red'' is installed at a predetermined distance from the entrance of the tunnel in the direction of arrival of the vehicle. If a fire breaks out in the tunnel, there will be a traffic light that can be set up, and a number of speed limit signs that can be switched in the direction of the vehicle will be placed at a certain distance from the traffic light. Or, if an earthquake occurs, a display is installed to notify the driver, and if the fire detector is activated in response to smoke or heat, or if the seismic motion sensor is activated and the seismic intensity reaches a predetermined level. If the seismic intensity is greater than or equal to Switching to a speed limit lower than the maximum speed, and further switching the display of other signs located between this sign and the traffic light to a speed limit lower than that of the sign located farthest from the tunnel entrance, A traffic signal control method characterized in that the speed of a vehicle traveling toward a tunnel entrance is gradually reduced and stopped before the traffic light, thereby preventing the vehicle from entering the tunnel. . (2) After all signs placed in the direction from the tunnel entrance to the direction of vehicle arrival have been switched to the specified speed limit signs, the display will also display a message to notify the driver of the occurrence of an earthquake or fire. A traffic signal control method according to claim 1, characterized in that the traffic signal is caused to blink while the traffic signal is blinking.