KR102639195B1 - Traffic signal control system and method linking cameras and floor-type pedestrian traffic lights - Google Patents

Abstract

The present invention discloses a traffic signal control system and method in which a camera and a floor-type pedestrian traffic light are linked. The present invention, when turning on the green traffic light installed at the crosswalk, turns on sequentially from a point far away from the vehicle stop line in the direction of the vehicle stop line, so as to protect pedestrians as much as possible from vehicles accidentally crossing the vehicle stop line and entering the crosswalk. The first characteristic is to do so. In addition, the present invention detects pedestrians entering the crosswalk or pedestrians who have not left the crosswalk using a camera or motion detection sensor when the green signal light of the crosswalk is about to turn off or is turned off, and the fact is notified to the stop line. The second feature is to notify the driver of the waiting vehicle.

Description

Traffic signal control system and method linking cameras and floor-type pedestrian traffic lights}

The present invention relates to a technology for controlling traffic signals at crosswalks, and more specifically, to traffic in which cameras and floor-type pedestrian traffic lights are linked to ensure maximum traffic safety for pedestrians crossing the crosswalk using cameras. It relates to signal control systems and methods.

In recent years, road traffic has increased more than ever, and traffic accidents are increasing significantly. In the traffic signal system, a crosswalk is a sidewalk designated for pedestrian crossing by painting the road surface according to the Road Traffic Act so that pedestrians can cross while ensuring their safety from the risk of traffic accidents.

However, according to a recent press release, it is reported that about a quarter of all traffic accidents occur at crosswalks. There may be many causes, but it is known that most accidents occur when a vehicle enters the crosswalk due to the driver's carelessness while a pedestrian crossing the crosswalk is crossing without any defense or caution.
Nevertheless, the conventional traffic signal control system had difficulty reducing traffic accidents at crosswalks because it did not provide sufficient accident prevention technology for pedestrians crossing crosswalks.
[Prior art literature]
[Patent Document]
Registered Patent Publication No. 10-2562355 (registered on July 27, 2023)

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The technical problem that the present invention aims to solve is that when turning on the green traffic light installed at the crosswalk, it turns on sequentially from a point far away from the vehicle stop line in the direction of the vehicle stop line, thereby preventing vehicles that accidentally cross the vehicle stop line and enter the crosswalk from pedestrians. The goal is to provide a traffic signal control system and method that links cameras and floor-type pedestrian traffic lights to provide maximum protection.

Another technical problem that the present invention aims to solve is to detect pedestrians entering the crosswalk or pedestrians who have not left the crosswalk using a camera or motion sensor when the green signal light on the crosswalk is about to turn off or is turned off. The aim is to provide a traffic signal control system and method in which a camera and a floor-type pedestrian signal light are linked to detect the fact and notify the driver of the vehicle waiting at the stop line.

The traffic signal control system in which a camera and a floor-type pedestrian signal light are linked according to the present invention relates to a traffic signal control system in which a camera and a floor-type pedestrian signal light or vehicle signal light are linked, and includes a camera that photographs a crosswalk on the road; an image analysis unit that analyzes whether a pedestrian exists on the crosswalk based on the image signal obtained from the camera and outputs a pedestrian detection signal when it is determined that a pedestrian exists; A traffic signal controller that outputs a traffic light control signal when a green traffic light is turned on at a pedestrian traffic light and outputs a warning control signal when the pedestrian detection signal is received; When the traffic light control signal is received, the floor-type pedestrian traffic lights installed in the shape of a strip on the curb of the sidewalk around the crosswalk starting line are sequentially turned on at a staggered interval, with the lights turning on first the further away from the vehicle stop line. driving part; It includes a warning unit that, when the warning control signal is received, displays a warning with emergency flashing lights on the sidewalk near the vehicle stop line and outputs a warning sound through a speaker.

In addition, the road is characterized in that it includes roads on both sides of the median divider.

In addition, the camera is characterized in that it includes a first camera and a second camera that respectively photograph one half of the crosswalk and the other half of the crosswalk and output video signals accordingly.

Additionally, the camera is characterized as being one of an IP (Internet Protocol) camera and a CCTV (Closed-circuit Television) camera.

In addition, the traffic signal controller is characterized in that it extends the green signal lighting time of the pedestrian traffic light when it is determined that there is a pedestrian who failed to cross the crosswalk, based on the image analysis result of the image analysis unit.

In addition, when the traffic signal controller turns on the floor-type pedestrian traffic light, it is characterized in that it controls the driving of the traffic light driver so that it turns on in units of 2 to 3 lamps.

In addition, the vehicle stop line is characterized by being displayed using LED.

In addition, the vehicle stop line is characterized by being displayed as a linear light source illuminated through a dedicated camera.

A traffic signal control method in which a camera and a floor-type pedestrian traffic light are linked according to the present invention includes the steps of having a camera photograph a crosswalk on a road and outputting an image signal accordingly; A video analysis unit checking whether a pedestrian exists on the crosswalk based on the video signal, and outputting a pedestrian detection signal when it is determined that a pedestrian exists; Outputting a traffic light control signal when a traffic signal controller turns on a green traffic light in a pedestrian traffic light; When the traffic light driver receives the traffic light control signal, several lamps sequentially turn on the floor-type pedestrian traffic lights installed in the shape of a strip on the sidewalk border around the starting line of the crosswalk at staggered intervals, but first as the distance from the vehicle stop line increases. lighting up; outputting a warning control signal when the traffic signal controller receives the pedestrian detection signal; And when the warning unit receives the warning control signal, displaying a warning using emergency flashing lights on the sidewalk near the vehicle stop line and outputting a warning sound through a speaker.

The computer recording medium according to the present invention records a computer program that implements a traffic signal control method in which the camera and the floor-type pedestrian traffic light are linked.

The present invention, when turning on the green traffic light installed at the crosswalk, lights up sequentially from a point far away from the vehicle stop line in the direction of the vehicle stop line, thereby protecting pedestrians as much as possible from vehicles accidentally crossing the vehicle stop line and entering the crosswalk. It works.

In addition, the present invention detects pedestrians entering the crosswalk or pedestrians who have not left the crosswalk using a camera or motion detection sensor when the green signal light of the crosswalk is about to turn off or is turned off, and the fact is notified to the stop line. This has the effect of preventing traffic accidents from occurring due to pedestrians who have difficulty walking normally by informing drivers of waiting vehicles.

Figure 1 is a block diagram of a traffic signal control system in which a camera and a floor-type pedestrian traffic light are linked according to the present invention.
Figure 2 is a schematic diagram showing an example of a traffic signal control system in which a camera and a floor-type pedestrian traffic light are linked according to the present invention applied to a road.
Figure 3 is a flow chart of a traffic signal control method in which a camera and a floor-type pedestrian traffic light are linked according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. First, it should be noted that when adding reference numerals to components in each drawing, the same components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, in describing the present invention, if a detailed description of a related known configuration or function is determined to be obvious to those skilled in the art or may obscure the gist of the present invention, the detailed description will be omitted.

Figure 1 is a block diagram of a traffic signal control system in which a camera and a floor-type pedestrian traffic light are linked according to the present invention, and Figure 2 is a traffic signal control system in which a camera and a floor-type pedestrian traffic light are linked according to the present invention applied to the road. This is a schematic diagram showing an example.

Referring to Figures 1 and 2, the traffic signal control system in which a camera and a floor-type pedestrian traffic light are linked according to the present invention includes a first camera (16A) and a second camera (16B), an image analysis unit (10), and a traffic signal control system. It includes a signal controller 20, a first warning unit 17 and a second warning unit 18, a signal driver 30, a first floor pedestrian signal light 15A, and a second floor pedestrian traffic light 15B. .

The traffic signal control system in which the camera of the present invention configured as described above and the floor-type pedestrian traffic light are linked will be described in detail as follows.

By the traffic signal controller 20, a red traffic light is turned on at the first vehicle traffic light 11A and the second vehicle traffic light 11B, and a green traffic light is turned on at the first pedestrian traffic light 12A and the second pedestrian traffic light 12B. When this lights up, pedestrians waiting to cross the crosswalk (14) cross the crosswalk (14). At this time, under normal circumstances, vehicles running on the road stop behind the first vehicle stop line 13A or the second vehicle stop line 13B and remain in a waiting state.

The first vehicle stop line 13A and the second vehicle stop line 13B can be displayed by painting, and as another example, LEDs arranged in a strip shape can be used. As another example, it can be implemented by irradiating a linear light source through a dedicated camera.

Here, the first vehicle traffic light 11A may be installed on one side of the median divider, and the second vehicle traffic light 11B may be installed on the other side of the median divider. Additionally, the first vehicle stop line 13A may be painted on one side of the median, and the second vehicle stop line 13B may be painted on the other side of the median.

At this time, the traffic signal controller 20 outputs a traffic light control signal to the traffic light driver 20 so that the first floor pedestrian signal light 15A and the second floor pedestrian signal light 15B turn on sequentially. However, as shown in FIG. 2, the first floor-type pedestrian signal light 15A is installed embedded in the floor near the sidewalk boundary stone adjacent to one end of the crosswalk 14. Likewise, the second floor-type pedestrian signal light 15B is installed embedded in the floor near the sidewalk boundary stone adjacent to the other end of the crosswalk 14. The first floor-type pedestrian traffic light 15A and the second floor-type pedestrian traffic light 15B have a structure in which several lamps are connected in a band shape, and LEDs can be used as the lamps.

Therefore, among the pedestrians entering the crosswalk 14 from both ends of the crosswalk 14, those farther from the first vehicle stop line 13A or the second vehicle stop line 13B start first, Pedestrians located close to the first vehicle stop line (13A) or the second vehicle stop line (13B) start a little later.

By doing this, even if the running vehicles fail to stop at the first vehicle stop line 13A or the second vehicle stop line 13B on time and proceed toward the crosswalk 14, the first vehicle stop line 13A or the second vehicle stop line 13B Since pedestrians located close to (13B) have not yet entered the crosswalk (14), damage from traffic accidents can be minimized.

There may be several ways to turn on the first floor pedestrian signal light 15A and the second floor pedestrian signal light 15B. For example, 2 to 3 lamps can be turned on sequentially in groups.

Of course, when the first floor-type pedestrian signal light 15A and the second floor-type pedestrian signal light 15B are turned on as described above, even if pedestrians ignore it and proceed toward the crosswalk 14 at the same time, it is against the traffic law. no.

However, unless it is unavoidable, pedestrians are expected to enter the crosswalk 14 according to the lighting order of the first floor pedestrian signal light 15A and the second floor pedestrian signal light 15B for their own safety. .

At a minimum, by turning on the first floor pedestrian signal light 15A and the second floor pedestrian signal light 15B sequentially as described above, it alerts pedestrians, thereby reducing the amount of traffic accidents at the crosswalk 14. You can contribute.

In the present invention, pedestrians crossing the crosswalk 14 are monitored, and when a traffic accident is expected, the fact is notified to pedestrians as well as waiting drivers to prevent traffic accidents. An example of this will be described as follows.

The first camera 16A photographs half of the crosswalk 14, for example, the half adjacent to the first pedestrian traffic light 12A, and transmits the resulting image signal to the image analysis unit 10. At this time, the first camera 16A may transmit an image signal to the image analysis unit 10 through wireless communication (eg, short-distance wireless communication) or a transmission line. For this purpose, the first camera 16A may be installed on the support of the first vehicle traffic light 11A.

Likewise, the second camera 16B photographs half of the crosswalk 14, for example, the half adjacent to the second pedestrian traffic light 12B, and transmits the resulting image signal to the image analysis unit 10. . Even at this time, the second camera 16B can transmit the image signal to the image analysis unit 10 through wireless communication (eg, short-distance wireless communication) or a transmission line. For this purpose, the second camera 16B may be installed on the support of the second vehicle traffic light 11B.

The video analysis unit 10 analyzes the video signals received from the first camera 16A and the second camera 16B, and when it is determined that there is a pedestrian on the crosswalk 14, it sends a pedestrian detection signal to traffic. It is transmitted to the signal controller 20.

The traffic signal controller 20 turns off the green traffic light at the first pedestrian traffic light 12A and the second pedestrian traffic light 12B, and detects the pedestrian from the image analysis unit 10 just before turning on the red traffic light. Check whether the detection signal has been received. If it is determined that the pedestrian detection signal has been received as a result of the confirmation, the traffic signal controller 20 outputs a warning control signal to one or more of the first warning unit 17 and the second warning unit 18 and sends the corresponding warning unit. Run it. In addition, the traffic signal controller 20 determines the transition time by turning on the red light of the first pedestrian traffic light 12A and the second pedestrian traffic light 12B, and the first vehicle traffic light 11A and the second vehicle traffic light 11B. )'s transition time to green lighting can be further delayed.

For example, the first warning display device 17A installed on the sidewalk adjacent to the first vehicle stop line 13A lights up in the first warning unit 17 by the warning control signal output from the traffic signal controller 20. At the same time, the first warning sound output device 17B installed on the pole of the first vehicle traffic light 11A or the pole of the first pedestrian traffic light 12A is driven. An emergency flashing light may be used as the first warning display device 17A.

Accordingly, the driver of the vehicle waiting behind the first vehicle stop line 13A sees the lighting state of the first warning display device 17A or hears the warning sound output from the first warning sound output device 17B and determines the current situation. After recognition, the departure of the vehicle is delayed regardless of whether the green traffic light at the first vehicle traffic light 11A is turned on. Therefore, it is possible to prevent a traffic accident even if the pedestrian stays on the crosswalk 14 while the first pedestrian traffic light 12A and the second pedestrian traffic light 12B are turned on due to the pedestrian's carelessness. .

There may be various types of surroundings of the pedestrian. For example, there may be a case where an elderly person who has difficulty walking normally crosses the crosswalk 14. As another example, there may be a case where a pedestrian enters the crosswalk 14 forcibly just before the first pedestrian traffic light 12A and the second pedestrian traffic light 12B change to a red traffic light. .

The warning sound output means of the first warning sound output device 17B and the second warning sound output device 18B are not particularly limited. For example, a super-directional speaker may be used as the warning sound output means.

In the above description, as a means of monitoring the crosswalk 14, the types of the first camera 16A and the second camera 16B are not specifically limited, and various types of cameras or sensors can be used. For example, as the monitoring means, an IP (Internet Protocol) camera or a CCTV (Closed-circuit Television) camera may be used. As another example, a laser beam or motion detector can be used. In addition, in the above description, split monitoring of the crosswalk 14 using two cameras 16A and 1B has been described as an example, but it is not limited to this. As an example, the entire area of the crosswalk 14 can be monitored using one camera.

Meanwhile, Figure 3 is a flowchart of a traffic signal control method linked to a camera and a floor-type pedestrian traffic light according to the present invention.

Referring to Figure 3, the traffic signal control method linked to the camera and floor-type pedestrian traffic light according to the present invention includes an image signal output step (S1), an image analysis step (S2), a traffic signal control step (S3), and a floor-type pedestrian signal light. It includes a traffic light lighting step (S4), a pedestrian detection signal confirmation step (S5), and a warning step (S6).

The traffic signal control method linked to the camera of the present invention and the floor-type pedestrian traffic light will be described with reference to FIGS. 1 and 2 as follows.

In the video signal output step (S1), the first camera 16A and the second camera 16B separately photograph one half and the other half of the crosswalk 14 based on the central dividing line and output video signals accordingly. do.

In the video analysis step (S2), the video analysis unit 10 checks whether a pedestrian exists on the crosswalk based on the video signal and outputs a pedestrian detection signal when it is determined that there is a pedestrian.

In the traffic signal control step (S3), the traffic signal controller 20 turns on a green traffic light at the first pedestrian traffic light 12A and the second pedestrian traffic light 12B installed around both ends of the crosswalk 14. When turned on, a traffic light control signal is output.

In the floor-type pedestrian signal light lighting step (S4), the traffic light driver 30 sequentially turns on the first floor-type pedestrian traffic lights 15A and the second floor-type pedestrian traffic lights 15B when the traffic light control signal is received. , the further away from the first vehicle stop line (13A) or the second vehicle stop line (13B), the farther it lights up first.

In the pedestrian detection signal confirmation step (S5), the traffic signal controller 20 outputs a warning control signal when the pedestrian detection signal is received.

In the warning step (S6), the first warning unit 17 and the second warning unit 18 are in the vicinity of the first vehicle stop line 13A and the second vehicle stop line 13B when the warning control signal is received. A warning is displayed and a warning sound is output.

Here, each of the steps (S1-S6) is not performed in a specific fixed order, but can be performed in an order appropriate for the traffic signal system.

Although the preferred embodiments have been described and illustrated above to illustrate the technical idea of the present invention, the present invention is not limited to the configuration and operation as shown and described, and does not depart from the scope of the technical idea. Those skilled in the art will appreciate that many changes and modifications are possible to the present invention. Accordingly, all such appropriate changes, modifications and equivalents shall be considered to fall within the scope of the present invention.

10: Video analysis unit 15A: First floor pedestrian traffic light
15B: 2nd floor pedestrian traffic light 16A: 1st camera
16B: 2nd camera 17: 1st warning unit
18: Second warning unit 20: Traffic signal controller
30: Traffic light driving unit

Claims (10)

It concerns a traffic signal control system that links cameras with floor-type pedestrian traffic lights or vehicle traffic lights.
Cameras that film crosswalks on the road;
an image analysis unit that analyzes whether a pedestrian exists on the crosswalk based on the image signal obtained from the camera and outputs a pedestrian detection signal when it is determined that a pedestrian exists;
A traffic signal controller that outputs a traffic light control signal when a green traffic light is turned on at a pedestrian traffic light and outputs a warning control signal when the pedestrian detection signal is received;
When the traffic light control signal is received, the floor-type pedestrian traffic lights installed in the shape of a strip on the curb of the sidewalk around the crosswalk starting line are sequentially turned on at a staggered interval, with the lights turning on first the further away from the vehicle stop line. driving part;
When the warning control signal is received, a warning unit displays a warning with an emergency flasher on the sidewalk near the vehicle stop line and outputs a warning sound through a speaker. A traffic signal control system in which a camera and a floor-type pedestrian signal are linked. According to paragraph 1,
The road is
A traffic signal control system in which cameras and floor-type pedestrian traffic lights are linked, which includes roads on both sides of the median divider. According to paragraph 2,
The camera is
A traffic signal control system in which a camera and a floor-type pedestrian traffic light are linked, comprising a first camera and a second camera that separately photograph one half of the crosswalk and the other half of the crosswalk and output corresponding video signals, respectively. According to paragraph 1,
A traffic signal control system in which the camera and a floor-type pedestrian traffic light are linked, characterized in that the camera is one of an IP (Internet Protocol) camera and a CCTV (Closed-circuit Television) camera. According to paragraph 1,
The traffic signal controller is
Based on the video analysis results of the video analysis unit, when it is determined that there is a pedestrian who failed to cross the crosswalk, the green light lighting time of the pedestrian traffic light is extended. Traffic in which a camera and a floor-type pedestrian traffic light are linked. Signal control system. According to paragraph 1,
The traffic signal controller is
A traffic signal control system in which a camera and a floor-type pedestrian signal light are linked, characterized in that when turning on the floor-type pedestrian signal light, the operation of the traffic light driver is controlled to turn on in units of 2 to 3 lamps. According to paragraph 1,
The vehicle stop line is
A traffic signal control system that links a camera and floor-type pedestrian traffic lights, which are displayed using LEDs. According to paragraph 1,
The vehicle stop line is
A traffic signal control system in which a camera and a floor-type pedestrian traffic light are linked, characterized by being displayed as a linear light source irradiated through a dedicated camera. A camera photographing a crosswalk on the road and outputting an image signal accordingly;
A video analysis unit checking whether a pedestrian exists on the crosswalk based on the video signal, and outputting a pedestrian detection signal when it is determined that a pedestrian exists;
Outputting a traffic light control signal when a traffic signal controller turns on a green traffic light in a pedestrian traffic light;
When the traffic light driver receives the traffic light control signal, several lamps sequentially turn on the floor-type pedestrian traffic lights installed in the shape of a strip on the sidewalk border around the starting line of the crosswalk at staggered intervals, but first as the distance from the vehicle stop line increases. lighting up;
outputting a warning control signal when the traffic signal controller receives the pedestrian detection signal; and
When the warning unit receives the warning control signal, displaying a warning with an emergency flashing light on the sidewalk near the vehicle stop line and outputting a warning sound through a speaker; a traffic signal control method in which a camera and a floor-type pedestrian signal are linked, including . A computer recording medium on which a computer program is recorded that implements a traffic signal control method in which the camera of claim 9 and the floor-type pedestrian traffic light are linked.

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