JPS63192197A - 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. At the same time, traffic lights and variable speed sensors (11 m) were installed at predetermined intervals from the tunnel entrance toward the direction of vehicle arrival, and speed detectors were installed to detect the speed of vehicles traveling toward the tunnel entrance to detect seismic motion. If the vibration exceeds the preset value, the traffic light changes from "green" to "
This system is characterized by the fact that the variable sign is controlled based on the speed of the vehicle detected by the speed detector to restrict the entry of vehicles into the tunnel.

[Conventional technology]

Traditionally, trains have had to stop all nine trains if an earthquake detector is activated, but on roads, the L
/'hIt has not been done enough yet.

[Problem that the invention seeks to solve]

For automobile-only roads, measures such as installing earthquake detectors in tunnels and controlling traffic lights based on the detected signals have not been taken into account.

It is extremely dangerous for cars to drive through this dangerous tunnel at normal speed during an earthquake.

This invention focuses on these points, and in the event of an earthquake, if the seismic intensity is higher than a predetermined seismic intensity, entry into a tunnel where damage is likely to occur is prohibited. It was designed to be regulated.

[Means to solve all problems]

An earthquake detector is installed in or near the tunnel, and a traffic light, multiple variable signs, and a speed detector to measure the speed of the vehicle are installed from the entrance of the tunnel toward the direction of vehicle arrival. The traffic lights and traffic lights are controlled depending on the operating status of the traffic lights and the speed of cars traveling toward the tunnel entrance.

[Effect]

If an earthquake is detected and the seismic intensity exceeds a predetermined intensity, the sign will change and flash according to the speed of the vehicle approaching the tunnel entrance, and the traffic light will change from "yes" to "red."'' to gradually reduce the speed of cars heading toward the tunnel entrance and stop them at traffic lights.

〔Example〕

In Figure 1, (1) is an expressway, (2) is a tunnel, (3) is a seismic motion sensor installed in the tunnel, (41 is a speed sensor such as the above-mentioned seismic motion sensor and Tsutsuchi's radar speedometer). Connect to vessel S.

A controller for controlling traffic lights and markings, which will be described later.
It is mainly composed of functional elements, such as microcomputers, which have arithmetic and control functions. This controller usually sends a control signal (10a)? However, if an earthquake occurs and the seismic intensity is greater than a predetermined value, a control signal (10b) for switching the traffic signal and maRf is output. (5) is a traffic light installed at a distance Nt1 away from the entrance of tunnel (2) (61 in the direction of arrival of the car), (71 is installed at a position away from traffic light (5) by a distance t2 in the direction of arrival of the table 7'h M711's variable wA makoto displays the speed limit. (8) is the above sign a (71 to t
The second variable
This is the sign.

Note that the relationship tl"t2=ts is limited to tl<t2<
ts, or a straight path such as the relationship L1=12<ts.

Various road conditions such as curves and crosswind caution areas.

Determined by the surrounding environment etc. (9) is a car traveling in the direction of the arrow. F8 is the controller (blinking signal in 4!
This is a flicker signal (flicker signal) generating unit that causes a mat (to be described later) to blink, and a sign is caused to blink by a blinking signal when a sensor is activated and the sign is switched to a predetermined sign.

In addition, the speed detector S is installed at a predetermined distance in the direction of arrival of the vehicle from the second sign a (8) installed at the position furthest from the entrance of the tunnel. Detects the speed of the oncoming vehicle (9) and controls all loading and unloading signals (4)
give to Upon receiving this detection signal, the controller provides speed limit indication signals to signs +71 and +81 in accordance with the speed of the vehicle. In other words, the speed limit is determined by the traffic light (
The distance up to 51 is determined as the control distance.

In such a configuration, when an earthquake does not occur, the control signal (1Oa) turns the traffic light (5) "green".

HA ta 17' and (8) are marked as the maximum speed of the motorway (for example, 1100 K/h). In such conditions, seismic motion occurs and the sensor (
If a sensitivity signal is given to the controller (41) from 31, and the seismic intensity is above a predetermined value, the controller (4) sends a control signal (1ob).
f output and control traffic light (5) # sign (71 and (8)).

In other words, the control signal (10) causes the traffic light (51 tube "
At the same time, the speed indicator of the first sign (7) is set to 30 Km/h, for example, according to the output of the speed detector described above.
lEz sign (81 speed sign is, for example, 60 Km/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 do this, the distances t';i and ts must take into account the braking distance and be sufficient to cope with the speed drop.

Next, an example of the configuration of the sign +71 f81 is shown in Figures 2 and 3.
Figure 4? I will explain using

Figure 2 shows an example of the structure of a sign. (II) is a front panel made of opaque sheet glass or plastic except for the dot αX8 (transparent or opaque), which is the minimum unit for display characters, etc. , (I3 is a round rod-shaped light guide that forms one dot with one or more pieces, is made of transparent plastic and has flexibility,
Transparent or semi-transparent (each dora) corresponds to 6'21. (Note: 1 m is the minimum unit of a character symbol or figure (picture) which will be described later. One end of the light guide is fixed to the front side @ aD dora) 630 part,
The other end is located in the light generating device I.

That is, the light generating device a4 is composed of a light source (for example, a halogen lamp) a, a reflector (RKFIJOTOR) ae that reflects the light emitted from the light source 0!9, and in addition to the light guide α3. The end is located at the focal point of the reflector ae.

When the light source a9 is turned on by the power from the power source αη, the light enters from the other end of the light guide 0 and reaches one end.

FIG. 3 is an example of a case where required markings are made under melting as shown in FIG. 2, and in reality, speeds, that is, numbers are marked.

Figure 4 shows a sign configured as shown in Figures 2 and 3 with a means for changing the sign added, al)
is a front plate, (13-1) to (13-n) are light guides,
(I4 is a generator, aS is a light source, (le is a reflector, the fin is a power source, (1B-1) to (1a-n) are optical switches, and the respective light guides (15-1) to (15
-n) and are selectively controlled individually by a selection circuit α. (4) is a controller, and the selection circuit a9 selectively controls the optical switch according to a signal generated from the controller (4) upon fire detection.

The flicker signal generated from the blinking signal generator FS of the controller (4) is given to the power supply (Iη, and the IE source αη is turned on, 0
IFF' 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 member selects the light switch and Display a speed sign lower than the speed sign.

Therefore, it is possible to indicate the speed for deceleration in consideration of the braking distance with respect to the actual value in order to stop the vehicle traveling on the sign (71 (sl) before the traffic light (5).

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. Avoid accidents by stopping before the tunnel entrance.

Incidentally, in the case of 9B+ mentioned above, a round bar-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.

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.

With a reflector? The combined sign consumes less power than the commonly used sign that uses a light source and two display masks (representing the shape of the displayed characters, etc.), and it is possible to reduce the amount of power generated when the light source is not energized. It is possible to eliminate the common illusory image (a phenomenon in which the light source in conventional signs appears to be lit due to sunlight reflected on the display mask surface even though it is not lit under bright sunlight).
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, and FIGS. 2 to 4 are diagrams showing examples of signs used in the present invention. tunnel,(
31 is an earthquake motion sensor, (4) is a restrainer, (5) is a traffic light, (6) is a tunnel entrance, +71 (81 is a weave, (
9) is the car - (10a) (1ab) is the control signal, an
is the front plate, an is the do-nod, α3 is the light guide, 0 is the light generator, α9 is the light source, αG is the reflector, αη is the power source,
+I11 is an optical switch, ■ is a selection circuit, S is a speed detector, and FS is a flashing signal generator. Note that the same or corresponding parts in FIG. 1 are designated by the same reference numerals.

Claims (1)

[Claims] 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. A traffic light that can be switched between "green" and "red" is placed at a distance, and speed limit signs that can be switched are placed at a prescribed distance from the traffic light in the direction in which cars are coming. A car speed detector is placed at a predetermined distance in the direction of arrival of the car from the sign installed farthest from the traffic light, and the sensor detects the seismic intensity. However, if the seismic intensity is higher than the preset seismic intensity, the speed of the vehicle traveling toward the tunnel entrance detected by the traveling speed detector is determined to be the closest distance from the tunnel entrance. Change the display of a sign located far away to a speed limit lower than the maximum speed of the motorway in question, and further change the display of other signs located between this sign and the above traffic light to the farthest point from the tunnel entrance. The speed limit was changed to a lower speed limit than the one indicated after the sign was switched, and all of the above signs were made to flash by the action of the controller, and the above traffic light was changed from ``green'' to ``red'' and the vehicle drove towards the entrance of the tunnel. After gradually decreasing the speed of the approaching vehicle,
A traffic signal control method characterized in that the traffic signal is stopped before a tunnel.