JPS63261500A - 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] This interaxle relates to a control method for backtracking signals, that is, signals on expressways. In addition to installing a sensitive fire detector, one traffic light and multiple town change camphors are placed at predetermined intervals from the tunnel entrance in the direction of arrival, and a sign is installed at the farthest position from the tunnel entrance. An indicator is installed to notify the driver if a fire breaks out in the tunnel in the direction the car is coming from, and a speed detector is installed to detect the speed of the car traveling toward the tunnel entrance. When a fire occurs due to a vehicle accident and the fire detector is activated, the controller first switches the above traffic light from "green" to "red" and displays the fire xA main on the display, and the speed detector activates the fire alarm. The feature is that the variable sign is controlled based on the traveling speed of the unloaded car to gradually reduce the speed of the car approaching the tunnel entrance and stop it before the traffic light mentioned above. shall be.

[Conventional technology]

Conventionally, a fire detector was installed in the tunnel, and when the fire detector went off, a fire detector was installed near the entrance of the tunnel (a
There is a system that switches the signal from ``blue'' to ``red'' to stop cars running toward the tunnel entrance just before the tunnel entrance.

[Problem that the invention seeks to solve]

In the conventional method, the traffic light only suddenly changes from "red" to "red", which is extremely dangerous for cars traveling at speeds of about 100 km/h and their drivers. This invention has been made to improve these problems.

[Failure to solve the problem]

A traffic light that can be switched between "green" and "red" will be installed near the tunnel entrance, and multiple variable signs will be placed at predetermined intervals from the traffic light pointing in the direction of vehicles. A speed sensor and a display to notify the driver in the event of a fire were installed at a predetermined distance from the sign installed at the 9th position in the direction of the vehicle's arrival.

[Effect]

If a fire detector in the tunnel is activated, the controller will change the above traffic light from "green" to "red" and the indicator will display that a fire has occurred, and the speed sensor will also be activated. Based on the vehicle's speed measured by the vehicle, the system will change the sign on the sign to a speed limit suitable for slowing the vehicle in stages, and the sign and the above-mentioned display will flash to alert the driver. The system gradually slows down the speed of cars driving towards the tunnel entrance and stops them before the traffic light installed near the tunnel entrance.

〔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 heat or smoke.Here, one is shown for convenience, but the tunnel It goes without saying that two or more pieces may be provided at predetermined intervals depending on the length of the piece. (4) is a controller that receives a detection signal from the fire detector and a speed detection signal from the speed detector described later, and controls the traffic lights, signs, and indicators described later; It is mainly composed of functional elements with control functions. ys is point # in the controller (4), signal (
7) This is a generating unit that blinks a sign and an indicator, which will be described later.The sign blinks with a blinking signal after a fire detector detects a fire and a predetermined sign is displayed. Mafr:, The display shows the display as shown in Figure 5! Flashes at π to alert drivers. (5) is a traffic light installed at a position 11 points away from the entrance (6) of the tunnel (2) in the direction of arrival of the car; (7)
is the first variable sign installed at a position 12 meters away from the traffic light (5) in the direction of the vehicle's arrival.

Display speed limits. (8) is a second sign installed at a position 15 points away from the first sign (7) in the direction of arrival of the vehicle.
of! This is an S job. Note that it is determined not only by the relationship e11*12els but also by the road condition 9 surrounding environment, etc., such as the relationship 11<12<Is or 11=12<Is. (2) is an indicator to notify the driver of the occurrence of a fire, and Q is good because it is a dot-type electric display that is easily visible both day and night. The second sign (8) is a speed detector disposed at a predetermined distance from the second sign (8) in the direction of arrival of the vehicle, and may be, for example, a radar speedometer. This detector is connected to the controller (4) like the fire detector. (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 set to "blue", and the first sign (7) and the second sign (8) indicate the maximum speed of the motorway (for example, 1
00 Km/h or 70 Km/h)'1:
Mark it. Under these conditions, if a fire breaks out in the tunnel, the fire detector (3) will be activated.

A sensing signal is provided to a controller (4). As a result, the controller (4) outputs the control signal α [and turns the traffic light (5) into “green”.
At the same time, the display changes from ``red'' to ``red'', and displays the display as shown in FIG. 5, for example.

On the other hand, the signs (7) and (8) are controlled according to the stray legs of the car detected by the violation detector S, and the second sign (8) is controlled according to the stray leg of the car detected by the violation detector S.
9), and the first sign (7) is marked with an even lower violation than the second sign. And the first. Both the second W indicator (71, (81) and the display device □□□ flash by a flicker signal.

In this way, the speed of the car is gradually reduced and the traffic light (
5) Stop before.

It goes without saying that in order to do this, the distance of 12*I& must be sufficient to accommodate the speed of the vehicle, taking into consideration the braking distance of the vehicle.

Next, the first. An example of the configuration of the second sign (7), (81 will be explained using Figures 2, 3, and 4. Figure 2 shows an example of the configuration of the sign, and (Iυ is a display character, etc.). The front panel is made of plate glass or plastic that is opaque except for the dots (transparent or translucent), which are the smallest unit of the It is a light guide.

It is made of transparent plastic and is flexible enough to accommodate transparent or translucent square dots. Note that the dot α2 forms the minimum unit of a character symbol or a figure (picture), which will be described later. One end of the light guide is fixed to the driver H13 of the front plate αυ, and the other end is located at the light source −awLa<.

That is, the light generating device α4 is composed of a light source (for example, a halogen lamp) α and a reflector (R) αe that reflects the light emitted from the light source α9. The other end is located at the focal point of the reflector αe. Then, when the light source is turned on by the power from the power source αη, the light enters from the other end of the light guide αJ 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, speed, that is, numbers are displayed. Fig. 4 shows a sign constructed as shown in Figs. 2 and 3 with a means for changing the sign added, where αυ is the front plate.

(13-1) to (15-n) are light guides, α fathom is a light generating device, aS is a light source or reflector, (η is a power source, (18-
1) to (18-n) are optical switches, which are semiconductors (1)
8-1) to (18-n) are provided in the middle, and each one is selectively controlled by a selection circuit al. (4) is a controller, and the selection circuit as selectively controls the optical switch based on a signal generated from the controller (4) when a fire is detected. In addition, the blinking signal generating section P of the controller (4)
The flicker signal generated at 8 is applied to the power supply to control the 9% L source αη and the display C11t-ON/OFF.

Therefore, if a fire in the tunnel is detected and the signal and flicker signal given from the controller (4) to the selection circuit α are dominant, the sign will light up the predetermined speed limit and the display (Fig. It flashes while displaying something like this.

Note that the speed limit indicated by W is different between the first sign and the second sign, and the speed indicated by n on the first sign is slower than the speed indicated on the second sign. In other words, the system takes into consideration the braking distance of the vehicle, decelerates the vehicle in stages and stops before the traffic light, and the system flashes to attract the driver's attention.

〔Effect of the invention〕

As described above, when a fire occurs in a tunnel, this invention notifies the driver of a car traveling towards the entrance of the tunnel that a fire has started 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 semiconductor made of transparent glass was used as an example, but it goes without saying that this may be replaced with an optical fiber.

By the way, a sign like the one in the example has an illusory image that is common in conventional signs that use a light source and a display mask (in a conventional sign, under bright sunlight, the light source is not lit but the display mask Phenomenon that appears as if it is lit due to the reflection of sunlight on the surface) t-
It becomes an extremely easy-to-see sign 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 the present invention, and FIG. 5 is a diagram showing an example of a display on a display. can be,【
l) is a road, (2) is a tunnel, (3) is a fire detector,
(4) is the controller, (51Fi second unit, (6) is the tunnel entrance, (7) is the first sign, (8) is the second sign. (9) is the car, uI is the control signal, α3 is a light guide, I is a light generator, α9 is a light source, αe is a reflector, a'n is a power source,
+Ill is a light switch, uI is a selection circuit, (to) is a display, S is a speed detector, and SF is a blinking signal generator. In FIG. 9, the same or corresponding parts are designated by the same reference numerals.

Claims (1)

[Claims] In addition to installing fire detectors in the tunnels of expressways, a traffic light that can switch between "green" and "red" is installed at a predetermined distance from the entrance of the tunnel in the direction of vehicle arrival, and a designated traffic light is installed from the traffic light. A plurality of speed limit signs with switchable and flashing signs are placed at a predetermined interval in the direction of the approaching vehicle, and furthermore, the sign located farthest from the traffic signal is placed in the direction of the approaching vehicle. A vehicle speed detector and an indicator to notify the driver if a fire breaks out in the tunnel are placed at a predetermined distance in the direction of arrival of the fire, and the fire detector is sensitive to smoke or heat. When activated, the controller will switch the traffic light from "green" to "red" and display on the display that a fire has broken out in the tunnel, and the traffic light detected by the traveling speed detector in the tunnel will be activated. Based on the speed of the vehicle traveling towards the entrance, the sign furthest from the tunnel entrance is switched to a speed limit lower than the maximum speed of the motorway in question, and the speed limit between this sign and the above traffic light is changed. The other signs located in between are changed to a lower speed limit than the sign located furthest from the tunnel entrance, and all of the above-mentioned signs and the above-mentioned display are changed by the action of the controller. A traffic signal control method characterized in that the speed of a vehicle traveling toward a tunnel entrance is gradually reduced by causing the light to blink and the vehicle is stopped before the traffic light.