JPS63192196A - Traffic signal control - 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] 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 variable signs are installed at predetermined intervals from the entrance of the tunnel toward the direction of vehicle arrival, and if seismic motion is detected and exceeds a preset vibration level, the traffic lights will be turned green. Tomo K when switching from to “red”
.

This system is characterized by controlling the variable signs to restrict the entry of vehicles into the tunnel.

[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.

[Problem that the invention seeks to solve]

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

This is extremely dangerous as cars are forced to drive at normal speed through tunnels that are dangerous even in the event of an earthquake.

This invention focuses on these points, and in the event of an earthquake, if the seismic intensity exceeds a predetermined seismic intensity, entry into tunnels where damage is likely to occur is restricted. .

Measures to solve problem c] In addition to installing an earthquake intensity sensor in or near the tunnel, one traffic light and multiple variable signs are installed from the entrance of the tunnel toward the direction in which cars arrive. Traffic signals and signs are used to give instructions to vehicles traveling toward the tunnel entrance based on the operating state of the sensor.

[Effect]

If an earthquake is detected and the seismic intensity is higher than a predetermined intensity, the variable signs will be changed and flashed, the traffic light will be changed from "K" to "Red", and the train will drive toward the tunnel entrance. Gradually reduce the speed of oncoming vehicles and stop them at traffic lights.

In Figure 1, +1) I′i motorway, (2
) is a tunnel, (3) is a seismic motion sensor provided with tunnel internal pressure, and 14) is a controller connected to the seismic motion sensor and controls the traffic lights and signs described later, and 2) has an arithmetic and control function such as a microcomputer. It is mainly composed of functional elements and elements. This controller normally outputs a control signal (10a), but
When an earthquake occurs and the seismic intensity is greater than a predetermined intensity, a control signal (10t) for switching traffic lights and signs is output. (5) is the distance j from the entrance (6) of the tunnel (2)
A traffic light installed at a position 1 point away from the traffic light in the direction of arrival of the vehicle, and (7) a variable speed limit sign installed at a position 12 distance away from traffic light (5) in the direction of arrival of the vehicle. do. (8) is a second variable sign installed at a position 13 degrees away from the above sign () in the direction of arrival of the vehicle.

In addition, I is limited to the relationship 11 = 12 = Is
t<h<13. Alternatively, it is determined by traps such as the relationship 1t=12<Is, various road conditions such as straight passages, curves, crosswind caution areas, surrounding environment, etc. 19)
is a car moving in the direction of the arrow. ? '8 is controller 14)
This is a flashing signal (7-light power signal) generating section within the system, which flashes a sign, which will be described later, and the sign flashes by the flashing signal after the sensor is activated and a predetermined sign is displayed.

In such a configuration, when an earthquake does not occur, the control signal (IOa) (traffic light +5) is "blue".

Sign (7) and +s+ ti are posted as the maximum speed (for example, 100Ax/h) of the motorway.

In such a state, seismic motion occurs and the sensor (3)
A sensing signal is given to the controller (4) from the controller (4), and if the seismic intensity is above a predetermined value, the controller (4) outputs a worship control signal (+'Ob), Control marks R(7) and 18).

That is, the traffic light (5) is activated by the control signal (lQt)).
The speed indicator of the first marker 11+71 is, for example, 307 m/h, and the speed indicator of the second marker 1B) is, for example, 60 Am/h.

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

It goes without saying that in order to achieve K in this way, the distance of 12e15 must take into account the braking distance and be sufficient to cope with the speed drop.

Next, the first. @2 sign (71+B+ configuration example! Figure 2.

This will be explained using FIGS. 3 and 4.

Figure 2 shows an example of the structure of a sign, where a9 is a dot α2 (a front panel made of transparent or opaque sheet glass, f or plastic, which is the smallest unit for display characters, etc.). , a3 is a round bar-shaped guide body that forms one dot with one or more dots, and is made of transparent plastic and has flexibility, and transparent 1+ corresponds to each translucent dot a2. Yes. Dot a
2 constitutes the minimum unit of a character symbol or figure (picture) to be described later. One end of the above light guide is the front plate Q11
The other end is fixed to the dot α2 part of the light generating device (1
Located at 4.

That is, the light generating device I is composed of a light source (for example, a halogen lamp) and a reflector (RIFLE(:!TOR)tin) that reflects the light emitted from this light source (i.e., a halogen lamp). The other end of country α is the reflector ue
located at the focal point.

Therefore, when the light source is turned on by the power from the power source αη, the source of the light enters from the other end of the light guide and reaches one end.

FIG. 3 shows 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 configured as in Figures 2 and 3 with a means for changing the sign added.
n is the front plate, (15-1) to (15-n) f'i source conductor, r14 is the generator, aS is the light source, and tm is the reflector.

α7) Fi power supply t (18-1) ~ (18-n) d
i switch, each light guide (+3-1
) to (+5-n) and are selectively controlled by a selection circuit tJ9. Reference numeral (4) denotes a controller which selectively controls the optical switch r1!1f'i of the selection circuit r1!1f'i in response to a signal generated from the controller (4) upon detection of a fire.

Further, the flicker signal generated from the blinking signal generating section 7 of the controller (4) is given to the power supply Oη, and the power supply αη is turned on and off.
FF control.

Therefore, if the controller (4) outputs a control signal to change the speed indicator according to the speed of an oncoming car during an earthquake of a predetermined seismic intensity, the selection circuit a9 selects the light switch 2.
Display speed signs lower than normal speed signs.

Therefore, each vehicle traveling to the sign T71181 should be stopped in front of the traffic light (5) (the speed for deceleration taking into account the braking distance relative to the actual value can be displayed).

As described above, this invention detects seismic motion, and if it exceeds a predetermined seismic intensity, the speed of the car traveling towards the tunnel entrance is gradually reduced according to the instructions of the sign. By stopping the vehicle before the tunnel entrance, the trap can prevent accidents.

In the above embodiments, a round rod-shaped light guide made of transparent plastic was used as an example.

It goes without saying that this may be replaced with the original fiber.

In addition, seismic intensity sensors are installed inside the tunnel,
Needless to say, it may be provided outside the tunnel near the tunnel.

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

When combined with a reflector, it uses a commonly used light source and a 9-display mask (representing the shape of displayed characters, etc.), consumes less power than the following signs, and does not require electricity to be applied to the light source. The illusory image that tends to occur when there is no illumination (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 in the conventional i!!!) This makes 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 control method according to the present invention, and FIGS. 2 to 4 are diagrams showing examples of signs used in the present invention, where fl) is a road, (2) is a tunnel, (
3) is a seismic motion sensor, 14) is a controller, (5) is a traffic light, 161 is a tunnel entrance, 17118+ is a sign, (
9) is a car, (loa) (job) is a control signal,
ul is the front plate, α3F1 dot, u is the light guide, +
14 is a light generating device, and Aray is a light source. ue is a reflector, aη is a power source, nu is a source switch, 119 is a selection circuit, and FB is a blinking signal generator. Note that the same or corresponding parts in FIG. 1 are designated by 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 speed limit signs that can be switched are placed at a predetermined interval in the direction of arrival of cars at a predetermined distance from the traffic light, and the sensor detects the seismic intensity, and the seismic intensity is determined in advance. If the seismic intensity exceeds the set earthquake intensity, the sign furthest from the tunnel entrance will be changed to a speed limit lower than the maximum speed of the relevant motorway, and the sign placed between this sign and the above traffic light will be The vehicle then drives towards the tunnel entrance by changing the speed limit on the other signs located farthest from the tunnel entrance to a lower speed limit than the new sign, and at the same time changing the traffic light from "green" to "red". A traffic signal control method characterized by reducing the speed of an incoming vehicle in stages and then stopping the vehicle in front of a tunnel. (2) Claim (1) characterized in that all the signs placed in the direction from the entrance of the tunnel to the direction of arrival of the vehicle are made to flash after being switched to a predetermined speed limit sign.
Traffic signal control method described in section.