JPS63208197A - 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 invention relates to a control method for traffic signals, that is, long-distance signals. A sensor that detects initial tremors and a sensor that detects 0'k are installed, and the vehicle is driven along the bridge and the traffic light and Kato signs at predetermined intervals from Rin in the direction of the vehicle's arrival. The speed detector that detects the speed of the approaching vehicle is developed, and if the above-mentioned initial value M sensor is created due to the land price, the above-mentioned speed sensor is controlled based on the detection result of the above-mentioned speed detector. The main shock was detected by the main shock detector, which was first activated by lowering the speed of the approaching vehicle and driving it at a slow or near slow speed.

That i! If M is a predetermined degree of IM or more, the traffic light is switched from "evening" to "red" to stop the vehicle from entering the night.

[Traditional technique rain]

Conventionally, in trains, if an earthquake detector is activated, 1 row J
1g8 is being stopped, but it is still not enough for roads and long bridges.

[The problem that the invention attempts to solve]

If an earthquake is detected, it is dangerous to drive over long bridges, etc. at normal speeds, so it is better to slow down, and it is also in the interest of public safety to stop traffic on the bridge, if this is due to agricultural policy.

[Means for solving problems]

In addition to installing the first JJA small wJ sensor and the real sensor near the bridge, one traffic light from before the bridge to the direction of arrival of the table, and multiple speed detectors. The above-mentioned traffic lights and variable signs are controlled depending on whether the initial microtremor sensor is activated or the main shock sensor is activated, as well as the speed of the vehicle detected by the speed detector.

[Effect]

When an initial slight movement is detected, the system flashes the variable sign at a speed lower than the maximum speed of the road based on the speed of the vehicle detected by the speed detector, thereby forcing the vehicle to pass over the bridge. ,on the other hand.

If the true sensor is activated, the old name will change from ``Yoi'' to ``Red'' and the car will stop before the bridge.

〔Example〕

Here we will briefly explain the nature of earthquakes.

Earthquakes can be divided into longitudinal waves and transverse waves in terms of waves within the earth's crust. Longitudinal waves are initial tremors (also known as P waves: Pr-imaryw)
aV8), and the vibration energy is small.

The delivery speed is fast. On the other hand, the composition is Hon'IN (also known as S wave: 5
13COodar7 It is called WaVri, and it is slower than the direct or longitudinal wave and has a large vibrational energy. In this way, since there is a difference in the slowing speed of P waves and S waves, the loss of earthquake ground motion at the ground surface is first caused by the imitation movement of the P waves, and after a while there is a large tremor of the S waves. When examining past earthquakes, the initial tremor duration time (P-8 hours) is distributed between 7 seconds and 30 seconds.

Are PeIL and S waves different as described above?If you look at the damage caused by earthquakes, the damage caused by the 8 waves is much greater.

Therefore, it is necessary to reduce the speed of the vehicle at the stage of detecting the P wave or to pass the bridge, and when the S wave arrives, it is necessary to stop the vehicle from passing if the Mi degree is higher than a predetermined value. It becomes public safety.

This invention will be explained below with reference to FIG.

In the first part, (l) is a road, (2) is a bridge like a long bridge spanning the sea, (3a) is a bridge with a PG/fIA detector equipped with an IMI 16+ IC,
(6b month o 8 wave detection number, +41 is the above P wave sensor (3a
) and an S-wave sensor (31), ) and a speed detector S such as a well-known radar speedometer, and is a controller that controls traffic lights and signs described later, and is a controller for controlling a traffic light and a sign, for example, a microcomputer. and 1t
It has been built mainly on a functional block with IIj 1fil m capabilities. (51 is a traffic light installed at a distance *l+ from the pier (6; in the direction of arrival of the car, (7)
is a traffic light (a second variable sign installed at a position 12 points away from 51 in the direction of arrival of the vehicle) to variably indicate the speed limit. This is the second variable sign installed at a different position.

Note that this is limited to the relationship e It =h =ls! 1〈1
Straight roads, such as relationships such as 2<h or l+=h<ls.

It is determined by various road conditions such as curves or crosswind caution areas, and the surrounding environment. (9) is a car traveling in the direction of the arrow. Incidentally, FB is a blinking signal (flicker) generating section in the controller +41, which causes a sign to be described later to blink, and it blinks after a sensor is activated and the sign changes to a predetermined sign.

The speed detector S is installed at a predetermined distance in the direction of arrival of the vehicle from the sign (8) installed at the farthest position from the tunnel entrance.

The speed of the traveling car (9) is detected and the detection signal No. 4 is given to the controller (41). Upon receiving this detection signal, the controller sets the speed limit sign No. 1g according to the speed of the table to the first .Give the second mark (71, tel.

In other words, the speed limit is determined based on the actually measured speed at the traffic light (5
1 is determined as the braking distance.

In such a configuration, if there is no abnormality, the traffic light (5
1 is always "blue", and the 1st. The second markings (7) and (8) indicate the maximum speed of the road (e.g. 50km/h).
, l. In this situation, P
When the M wave is sensed, a sensing signal is given from the P wave sensor (3a) to the controller +41.

Thereby, the controller (41) outputs a control signal αG based on the detection result by the storm detector S, and controls the targets R (7) and (81).

That is, the speed indicator of sign (7) is set to 20 km/h, for example, and the speed indicator of sign (8) is set to 301 (m/h), for example, by the control signal aα.

To explain in more detail, the speed of the vehicle is gradually lowered before Rin, and the vehicle is driven at a low speed.

In this case, +tsg machine (51 remains If, I.

Next, it is detected by the sensor (3b), and the temperature is above a certain level! In the case of 14 mice, it is a signal because it means that you will be exposed to failure or crisis! Switch the number 151 from "'#" to "red" to stop the vehicle heading towards the bridge in front of the bridge.

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

Figure 2 shows an example of the structure of a sign, where I is a front plate made of opaque plate glass or plastic except for the dot αX5 (transparent or opaque), which is the minimum unit of display characters, etc.; The light guide is a round bar-shaped light guide in which one or more dots are formed, and is made of transparent plastic and has flexibility, and each transparent or translucent dot Q? This corresponds to J. Note that the dot α is the minimum unit of a character symbol or figure (to be described later).One end of the light guide is located at the front &0υ
The other end is located at the light generating device α.

That is, V:, Occurrence! 11 (141 is composed of a light source (for example, a halogen lamp) 119 and a reflector (REF section CTOR) tiG that reflects the light emitted from this light source α9, and the other end of the light guide u3 is connected to the reflector Located at the focus of Q[i.

Therefore, when the light source 6S is turned on by the power from the electric power Haη, the light enters from the other end of the light guide αj and reaches one end.

FIG. 3 shows an example of one situation in which required markings are made based on the configuration shown in FIG. 2, and in reality, the speed, that is, the number, is displayed.

FIG. 4 shows a sign configured as shown in FIGS. 2 and 3 with a means for changing the sign added, where αυ is the front surface and ICs (13-li to (13-n) are light guides).

αa is a light generator, U! j is the light source, ae is the reflector, a
In the old days, the power supply (18-rl) was an original switch, which was provided in the middle of each light guide (16-rl), and was selectively controlled by the selection circuit 0.

(41 is a controller, and according to the signal generated from this controller (41), the selection circuit α■ selects and controls the above-mentioned source switch 'P6. The flicker signal is applied to the power source aη and controls the power source C17) to turn on and off]4'.

Therefore, when the controller (41) detects a P-wave and outputs a control signal to change the speed indicator according to the speed of the vehicle traveling, the selection circuit α selects the light switch and selects the normal Display a speed limit sign that is lower than the speed sign.

Therefore, it is possible to post speed limit signs according to vehicle speeds at markers # & 17+ and +81.

〔Effect of the invention〕

This invention is as described above, so when a P wave is detected, the speed of a car approaching the bridge is gradually lowered according to the instructions of the sign, and the car approaches the bridge at a low speed. Then, an S wave was detected, and it was 31m! If the number of bridges exceeds a predetermined value, the traffic light (51) is switched to red to stop vehicles from entering the bridge, thereby preventing unexpected accidents.

In addition, in the above example, a round rod-shaped object made of transparent plastic was used as an example.

Needless to say, the original fiber may be replaced.

Further, although the Fil sensor and the S-wave sensor are provided on the piers of the bridge, it goes without saying that they may be provided near the bridge.

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

A sign that combines a reflector with a conventionally commonly used original phrase and one display mask (representing the shape of displayed characters, etc.)
Compared to historical signs, the effacement force is small, and there is an illusory image that tends to occur when the light source is not energized. The reflection of sunlight on the surface of the display mask makes it appear as if it were lit *&) 'k 1. L
This sign is extremely easy to see for drivers.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining the signal control method according to the present invention, and FIGS.
(!+a) is the initial motion sensor of the land preserver, (3'k))
is the main sensor, (4I is the controller, (51 is the traffic light * (
6+ is Ia leg, (7) (81 is a sign, (9) is a car, 1
1 (I is the control # signal, αυ is the front plate, α2 is the door), Q:l is the light guide, α4 is the light generator, 0
is the light source, tie is the reflector, (l is the power supply, ul is the original switch, ri is the selection circuit 9th is the speed detector, and FS is the flashing signal generator. In addition, the same or equivalent parts in Figure 1 are They are shown with the same reference numerals.

Claims (1)

[Claims] Initial earthquake tremor detectors and main shock detectors are installed on bridges where vehicles can pass, or near the bridge, and a "blue" and "red" switch is installed at a predetermined distance from the bridge in the direction of arrival of vehicles. A plurality of speed limit display signs that can be switched in the direction of arrival of vehicles are placed at a predetermined distance from the signal at a predetermined distance from the traffic light, and are placed at a position farthest from the signal. A vehicle running speed detector is placed at a predetermined distance from the road sign in the direction of arrival of the vehicle, and when the initial microtremor sensor detects an initial microtremor, the speed sensor detects the initial microtremor. Based on the vehicle speed, the sign located farthest from the bridge is changed to a speed limit lower than the maximum speed of the road in question, and the other signs located between this sign and the traffic light are changed to the farthest point from the bridge. The speed limit is changed to a lower speed limit than the one displayed on the sign located at the bridge, and all of the above signs are made to flash by the action of the controller, and the speed of vehicles traveling towards the bridge is gradually reduced. In addition to allowing vehicles to pass at low speeds, if the main shock detector detects a main shock and the seismic intensity is greater than a predetermined intensity, the traffic light will be switched from "green" to "red" and vehicles will not be allowed to enter the bridge. A traffic signal control method characterized in that the traffic signal is stopped.