JPS63265392A - Control method for traffic signal - Google Patents

Abstract

PURPOSE:To preclude an accident at the time of earthquake occurrence by displaying earthquake occurrence on a display device by blinking, changing and blinking the indication of a variable indicator, and also turning a signal from blue to red when earthquake motion is detected and its intensity is larger than specified. CONSTITUTION:A signal 5 is lit in blue by a control signal 10a unless an earthquake takes place, and the indicators 7 and 8 indicate the maximum speed, e.g. 100km/h of an automobile road. If earthquake shock occurs in this state to cause an earthquake shock sensor 3 to send a sense signal to a controller 4 and its intensity is larger than specified, the controller 4 outputs a control signal 10b to display the earthquake occurrence and speed reduction on a display device 20 and also turns the signal 5 to red. Further, the speeds indicated by the indicators 7 and 8 are set to, for example, 30 and 60km/h respectively and the display of the display device 20 and the indications of the indicators are blinked by a blinking signal from a blinking signal generation part FS. Consequently, vehicles which travel toward the entrance of a tunnel are forced to slow down stepwise and stop in front of the tunnel, thereby preventing an accident from occurring in the case of the earthquake occurrence.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a control method for traffic signals, that is, road signals. More specifically, the present invention relates to a method for controlling traffic signals, that is, road signals. More specifically, the present invention relates to a control method for traffic signals, that is, road signals. More specifically, it is a method for providing a seismic motion sensor in or near a tunnel of a motorway. In addition, traffic lights and multiple variable signs and indicators are installed at predetermined intervals from the entrance of the tunnel toward the direction of vehicle arrival. As soon as the above display indicated that an earthquake had occurred, the traffic light was switched from "true" to "red" and the variable sign was controlled to restrict the entry of cars into the tunnel. It is characterized by points.

[Conventional technology]

Conventionally, trains have been forced to stop nine trains if an earthquake detector is activated, but this has not yet been done sufficiently on roads.

[The problem that the invention attempts to solve]

This is because on expressways, there are no measures such as installing earthquake detectors in the tunnels and controlling traffic lights based on the detected signals.

This is extremely dangerous as you will have to drive at normal speed through a tunnel that is dangerous even in the event of an earthquake.

This invention focuses on this point and is designed to restrict entry into tunnels where damage is likely to occur if the seismic intensity exceeds a predetermined intensity, excluding 1% earthquakes. .

[Means for solving problems]

In addition to installing an earthquake intensity sensor in or near the tunnel, a traffic light and multiple variable signs are installed from the entrance of the tunnel toward the direction of vehicle arrival, in the event of an earthquake.
A display device is provided to display this, and instructions are given to vehicles traveling toward the tunnel entrance using the display, traffic light, and sign based on the operating state of the sensor.

[Effect]

If an earthquake is detected and the seismic intensity exceeds a predetermined intensity, the display will indicate that an earthquake has occurred and will flash, and the variable signs will also change their markings and flash, and the traffic lights will turn green. The driver then changes the light to "red" and drives toward the tunnel entrance, gradually reducing the speed of the vehicle until it stops at the traffic light.

〔Example〕

In FIG. 1, (l) is a motorway, (2) is a tunnel, (31 is a seismic motion sensor installed in the tunnel, and (41 is a controller that is connected to the seismic motion sensor and controls the traffic lights and signs described later. It is mainly composed of functional elements with calculation and control functions such as a microcomputer.This controller usually outputs a control signal (10a), or when an earthquake occurs. If xi is greater than a predetermined value, a control signal (10 ri) is output for switching traffic lights and signs. (5
1 is a traffic light installed at a distance of 1 distance from the entrance of the tunnel (2) (6, in the direction of arrival of the car), and (7) is installed at a position 12 distances away from the traffic light 151 in the direction of arrival of the car. The speed limit is variably displayed on the first variable sign. (8) is a second variable sign installed at a position 15 degrees away from sign (7) in the direction of arrival of the vehicle.

Note that the relationship is limited to l+ =/2 =ls /I</
2<13, or It = 72 (straight path, such as the relationship of i3.

Various road conditions such as curves and crosswind caution areas.

Determined by the surrounding environment etc. @ is an indicator installed near the second sign (8) or closer to the direction of the vehicle than the second sign (8), and indicates when a local bird is spotted.
The driver is informed of this by displaying it as shown in Figure 5.It is preferable to use a dot type electric display so that it can be seen day or night. (9) is a car traveling in the direction of the arrow.

FB is a blinking signal (flicker signal) generator in the controller +41, which causes the above-mentioned indicator (■) and a sign to be described later to blink.

After the sensor is activated and a predetermined sign is displayed, the indicator flashes in response to a flashing signal while making a display as shown in FIG.

In such a configuration, if an earthquake does not occur, IC is a control signal (10a), a traffic light (51 is "green", a sign (7), and (81 is the maximum speed of the motorway) (
For example, it is marked as 1) 00k/h). In such a state, when an earthquake occurs, the controller 14+ is given an IC sensing signal from the sensor (3), and if the degree is greater than a predetermined value, the controller 14+ outputs a control signal (10b) and displays the 1 indicator section. The traffic lights (51, 1st and 2nd signs (7) and f81
t' 71) 1J (il.

That is, the control signal (10b) IC causes the traffic light (51
At the same time, the speed indicator of the first sign (7) is set to, for example, 30 km/h, and the speed indicator of the second sign (8) is set to, for example, 60 km/h.

More specifically, the speed of the vehicle heading toward the tunnel is gradually reduced by l before the tunnel entrance, and the vehicle is stopped before the tunnel entrance.

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

Next, the first. A configuration example of the second sign (71 (81) is shown in FIG.

This will be explained using FIG. 3 and the fourth factor.

Figure 2 shows an example of the structure of a sign, where αυ is a dot (13), which is the minimum unit of display characters, etc. am is a round rod-shaped light guide in which one or more dots are formed, and is made of transparent plastic, has flexibility, and is made to correspond to each transparent or translucent dot α2. .The dot (I3) is the minimum unit of a character symbol or figure (picture) to be described later. One end of the light guide is connected to the front plate (
1)), and the other end is located at the light generating device Q4.

That is, the light generating device +141 is composed of a light source (for example, a halogen lamp) αS, a reflector (REFIEiOTOR) QFi that reflects the light emitted from this light source (I!1), and in addition to the above-mentioned light guide αj. The end is located at the focal point of the reflector αe.

Therefore, the power from power supply 0 causes light source a! If one light is on, the source enters from the other end of the light guide αj and reaches one end.

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

The fourth factor is a sign configured as shown in FIGS. 2 and 3, in which a means for changing the sign is added, αυ is a front plate, and (15-ri to (15-n) are light guides.

a4 is the generator, α is the light source, cod is the reflector, and aη is the power source.

(1B-1) to (18-n) optical switches, each provided in the middle of n light guides (13-ri to (13-n)).

The selection is individually controlled by the selection circuit a9. (41 is a controller, and the selection circuit 19 selects and controls the light switch according to the signal generated by the fire detection from the controller (41). The generated flicker signal is applied to the power supply α power♂ indicator ■n, and turns them ON/OFF.

Therefore, the controller (41) outputs a control signal to change the speed indicator according to the speed of the vehicle traveling in the event of a landslide of a predetermined seismic intensity.In other words, the selection circuit 0 selects the original switch 1.
Display speed signs lower than normal speed signs.

Therefore, the speed for deceleration taking into account the braking distance will be displayed in order to stop the vehicles traveling at traffic lights +51 and n coming at traffic lights (71 + 81) before the traffic lights +51.

This invention is configured as described above, so if an earthquake is detected and the motion is more than a predetermined straightness, the driver is first informed of the occurrence of an earthquake by displaying the occurrence of an earthquake on the display, and then the driver is driven towards the entrance of the tunnel. The speed of the incoming vehicle will be gradually reduced according to the instructions of the sign, and the vehicle will be stopped before the tunnel entrance, thereby preventing accidents.

Incidentally, in the above 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.

Furthermore, it goes without saying that the ground IM sensor may be provided inside the tunnel, or may be provided outside the tunnel near the tunnel.

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

The state in which the reflector is combined consumes less power than the conventionally commonly used signs that use a light source and one display mask (representing the shape of displayed characters, etc.), and can be used even when the light source is not energized. Illusory images that tend to occur (conventional a
Under bright sunlight, the sign appears to be on due to the reflection of sunlight on the display mask surface even though the light source is not on. becomes.

[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 the invention, and Fig. 5 is a diagram showing an example of a display on a display. can be,(
1) is a road, (2) is a tunnel, (3) is a seismic motion sensor, (4 bows) controller, (51 is a traffic light, (6; is a tunnel entrance, (7) and (8) is a sign, (9) is a car, (10
a) (10b) is the control signal, αυ is the front plate, α2 is the dot, αj is the light guide, α old generator, (15 is the light source, αe is the reflector, αη is the power supply, or the main switch, α9 1 is a selection circuit. Crane is a display device, and 7B is a blinking signal generator. Note that the same or equivalent parts are given the same reference numerals.

Claims (2)

[Claims] (1) A seismic motion detection sensor is installed in or near the tunnel of the motorway, and the sensor is connected to a controller that outputs a control signal according to the seismic intensity of the seismic motion, and the direction of arrival of the vehicle from the entrance of the tunnel is A traffic light that can switch between “green” and “red” is installed at a predetermined distance from
Then, a plurality of switchable speed limit signs are placed at a predetermined interval in the direction of vehicle arrival at a predetermined distance from the traffic light, and a display is placed to notify drivers in the event of an earthquake. The above-mentioned sensor detects the seismic intensity, and if the seismic intensity is higher than the preset seismic intensity, the above-mentioned indicator displays that an earthquake has occurred, and the tunnel entrance is Change the display of the sign furthest from the tunnel entrance to a speed limit lower than the maximum speed of the relevant motorway, and change the display of other signs located between this sign and the traffic light farthest from the tunnel entrance. The speed limit was changed to a lower speed limit than the one posted on the sign located at the end of the tunnel, and the traffic light was changed from "green" to "red" to gradually reduce the speed of vehicles traveling toward the tunnel entrance. A traffic signal control method characterized in that the traffic signal is then stopped in front of a tunnel. (2) After all the signs placed in the direction from the tunnel entrance to the direction of the vehicle are switched to the specified speed limit signs, and the above-mentioned display is made to flash after the display indicating the occurrence of an earthquake is displayed. Claim No. 1 characterized in (
1) Traffic signal control method described in section 1).