RU118778U1 - SYSTEM OF AUTOMATIC REGULATION OF ROAD TRAFFIC AT A pedestrian crossing - Google Patents

Abstract

A system of automatic traffic control at a pedestrian crossing, including light sources and controls for the movement of pedestrians and vehicles, containing relays, making and breaking relay contacts, a phototransistor, DC and AC power supplies, characterized in that one of the light sources and the phototransistor, responsive to the movement of pedestrians, are installed on racks in front of the carriageway at the edge of the sidewalk, and two other light sources, respectively regulating the movement of pedestrians and vehicles, are suspended above the crossing in the middle of the carriageway, while the pedestrian interrupts the luminous flux from the first light source to the phototransistor , which reacts to the fact of movement at the crossing, triggers the make or break contacts of the relay and automatically turns on or off the corresponding light signals that allow or prohibit the movement of vehicles.

Description

The utility model relates to the field of traffic regulation at pedestrian crossings and relates, in particular, to the creation of a pedestrian signal system.

A well-known automatic switch on and off lighting depending on natural light [A. Ivashchenko, N. Kotelenets Photorele on the simistor.html //: electroz.narod.ru/boni/fotorele.htp].

The principle of operation of the circuit is based on the fact that with a low level of natural illumination, the illuminator is turned on. With a high level of natural light, the illuminator turns off.

Known automatic switching high and low beam, containing a relay, phototransistor, current source. The principle of operation is as follows: when the phototransistor is illuminated with the headlights of an oncoming car, a relay is activated that switches the car light from the main beam to the dipped [G. Minchev Automatic switch of the high and low beam of the headlights. html //: denergodetal.ru].

The disadvantage of these light switching machines is the inability to use to control traffic at a pedestrian crossing due to the lack of their own light sources.

A known system of automatic traffic control at a pedestrian crossing using light sources [Patent RU No. 2395846].

The system includes a signal board with the image of the symbols displaying the time remaining until each signal changes, a device for generating a voice signal in real time.

There is a combination of five functions from signals for pedestrians, such as a transition signal, a stop signal, the remaining time of each signal from the red / green and / or voice generator for the blind in one signal board. For the school zone, racks are installed with LEDs on the stop line at the transition to warn drivers by flashing LEDs on the racks automatically when the transition signal is on.

The system also allows displaying advertising messages or information for pedestrians and a system for detecting with the presence or absence of pedestrians on the sides of the crossing using sensors to prevent unnecessary interruption of the traffic flow caused by unnecessary signal changes, even if there are no pedestrians on the sides of the crossing.

The system is controlled by a processor, the control unit of which receives signals from an external control unit, generates pulses of time intervals of each change of signals and displays them on the signal board in the form of a certain sequence of commands.

The disadvantage of this alarm system is its complexity in manufacturing, installation and maintenance.

The objective of the utility model is to simplify the design of an automatic traffic control system at a pedestrian crossing.

EFFECT: creation of a simple system for determining, with the help of a light source and a phototransistor, the presence or absence of pedestrians on the sides of the crossing, to prevent unnecessary interruption of the traffic flow caused by excessive change of signals when there are no pedestrians on the sides of the crossing, as well as for the safe crossing of the carriageway at a pedestrian crossing due to a stop before the transition of the vehicle to a signal prohibiting movement.

This is achieved by the fact that in a system of automatic traffic control at a pedestrian crossing, including light sources and controls for the movement of pedestrians and vehicles, containing relays, closing and opening relay contacts, a phototransistor, DC and AC power supplies, one of the light sources and a phototransistor that responds to pedestrian traffic is mounted on racks in front of the carriageway at the edge of the sidewalk, and two other light sources that regulate the movement, respectively pedestrians and vehicles, suspended above the junction in the middle of the carriageway, while the pedestrian interrupts the light flux from the first light source to the phototransistor, which reacts to the fact of movement at the junction, triggers the closing or opening relay contacts and automatically turns on or off the corresponding light signals that allow or prohibiting the movement of vehicles.

Figure 1 shows a system of automatic traffic control at a pedestrian crossing in the initial position.

Figure 2 shows a system of automatic traffic control at a pedestrian crossing in the working position.

Figure 3 shows the control circuit (electric circuit) of the system of automatic traffic control at a pedestrian crossing in the initial position.

Figure 4 shows the control circuit (electric circuit) of the automatic traffic control system at a pedestrian crossing in the working position.

In the absence of pedestrians (Fig. 1,3), the light source 1 (EL1) illuminates the phototransistor 2 (Q1). Light source 1 (EL1) and phototransistor 2 (Q1) are mounted on racks in front of the carriageway of road 3 at the edge of the sidewalk.

As a result of this, the light source 4 (EL2) is turned on, prohibiting the movement of pedestrians and the light source (EL3) is turned off, which prohibits the movement of vehicles. Transport carries on the carriageway.

When a pedestrian 6 appears on the sidewalk (Fig. 2.4) between the light source 1 (EL1) installed on the racks and the phototransistor 2 (Q1), the light flux from the light source 1 (EL1) to the phototransistor 2 (Q1)) is interrupted. As a result of this, the light source 4 (EL2), prohibiting the movement of pedestrians, is turned off and the light source 5 (EL3), which prohibits the movement of vehicles, is turned on. When the light source 3 (EL3) is turned on, which prohibits movement, the vehicle stops and the pedestrian safely crosses the roadway. Switching automatically adjustable pedestrian crossing to its original position occurs after a certain time, sufficient for the pedestrian to cross the road.

The control circuit (electric circuit) of the automatic traffic control system at a pedestrian crossing in the initial position (Fig. 3) includes the following main elements: light sources 1 (EL1), 4 (EL2) and 5 (EL3), a phototransistor 2 (Q1), relay 7 (K1, NC contact of relay 8 (K 1.1), NC contact of relay 9 (K1.2), DC power supply 10, AC power source 11.

In the absence of a pedestrian, the luminous flux from the light source (EL1) freely reaches the phototransistor 2 (Q1). Relay 7 (K1 activates the opening contact of relay 8 (K1.1) and the closing contact of relay 9 (K1.2). As a result, the light source 4 (EL2), which prohibits pedestrian traffic, is turned on and the light source 5 (EL3 ) prohibiting the movement of vehicles.

In the working position (figure 4) when a pedestrian appears on the sidewalk (not shown conditionally) between the light source 1 (EL1) and the phototransistor 2 (Q1), the light flux from the light source (EL1) does not reach the phototransistor 2 (Q1).

Relay 7 (K1) disconnects the opening contact of relay 8 (K1.1) and the closing contact of relay 9 (K1.2). As a result of this, the light source 4 (EL2), which prohibits the movement of pedestrians, is simultaneously turned off and the light source 5 (EL3), which prohibits the movement of vehicles, is turned on.

When a pedestrian enters the area of the machine before crossing the roadway, a prohibition signal for transport automatically lights up. The traffic stops, which makes it safe for the pedestrian to cross the roadway.

All the control components of the automatic regulation system are located at the crosswalk through the roadway. At the edge of the sidewalk along the road in front of the carriageway of the pedestrian crossing, a light source (EL1) and a phototransistor (Q1) are installed on the racks. Racks are installed on the sidewalk in front of the carriageway in such a way that a pedestrian can freely pass between these racks before entering the carriageway. A light source (EL2), which prohibits pedestrian traffic, and a light source 3 (EL3), which prohibits traffic, are suspended from above a pedestrian crossing in the middle of the carriageway. The remaining controls of the automatic control system are located in a closed box housing next to the racks with a light source (EL1) and a phototransistor (Q1).

The main elements of an automatically controlled pedestrian crossing are installed on the opposite side of the crossing with the same effect.

Using a system of automatic traffic control at a pedestrian crossing will make it possible to exclude a collision with pedestrians crossing the roadway if vehicles moving along the right-most lane block the visibility of the pedestrian crossing sign, if there is no marking on the zebra road, for example, after laying asphalt or in winter conditions when the carriageway is covered with snow.

Claims (1)

A system of automatic traffic control at a pedestrian crossing, including light sources and controls for the movement of pedestrians and vehicles, containing relays, closing and opening relay contacts, a phototransistor, DC and AC power sources, characterized in that one of the light sources and a phototransistor, responsive to pedestrian traffic, installed on racks in front of the carriageway at the edge of the sidewalk, and two other light sources that respectively regulate the movement of pedestrians passages and vehicles suspended above the passage in the middle of the carriageway, while the pedestrian interrupts the light flux from the first light source to the phototransistor, which reacts to the fact of movement at the transition, causes the relay to make or break contacts and automatically turn on or off the corresponding light signals that allow or prohibiting the movement of vehicles.