KR20120013700A - Unprotected Left Turn Vehicle Signal Control System - Google Patents

Abstract

A driver for detecting an unprotected left turn waiting vehicle at an intersection, a second detecting part for detecting a vehicle approaching an intersection, and information detected by the first detecting part and a second detecting part of a driver of an unprotected left turning waiting vehicle An output unit configured to be recognized by a driver of a vehicle approaching an intersection with the control unit, a control unit controlling the output unit based on the information detected by the first and second detection units, and detected by the first and second detection units Disclosed is a non-protected left turn vehicle signal control system comprising a communication unit receiving received information and transmitting the received information to a control unit. According to the disclosed unprotected left turn vehicle signal control system, at an intersection to which an unprotected left turn signal is applied, information can be provided to not only the unprotected left turn vehicle but also to the straight vehicle to enable the safe operation at the intersection to prevent an accident from occurring. .

Description

Unprotected left turn vehicle signal control system {A CAR SIGNAL CONTROLLING SYSTEM OF LEFT TURN}

The present invention relates to an unprotected left turn vehicle signal control system, and more particularly, to an unprotected left turn vehicle signal control system for inducing an unprotected left turn vehicle to safely drive at an intersection.

The number of cars is increasing rapidly every year as society develops, becomes urbanized, and the standard of living improves. As a result, severe traffic jams occur not only in large cities but also in small and medium-sized cities, and economic losses are increasing every year.

In order to improve such traffic jams, there have been many attempts to open roads and improve traffic signal systems.However, it is not important to open new roads in cities. It is recognized by the method.

On the other hand, the traffic signal system as described above is to achieve the effect that can substantially achieve the vehicle flow smoothly when the driver is driving in compliance with the traffic signal properly.

In this way, the traffic signal system for appropriately controlling vehicle flows has been improved to improve not only the traffic flow in the city but also the traffic flow in local small and medium cities. There is a difficult problem.

In particular, at intersections, there is a problem in that the flow of vehicles is delayed by traffic lights for making traffic flow in each direction in sequence, and among them, the flow of straight vehicles due to the appearance of time signals of left turn signals at intersections. Often this does not occur smoothly. That is, since the left turn signal is sequentially displayed regardless of the presence or absence of the left turn waiting vehicle, a lot of time is delayed and vehicles in the straight lane are delayed more than necessary, causing frequent congestion of the road.

In addition, at intersections of roads with relatively small traffic volumes, traffic flow of straight vehicles is not smooth due to the waiting time of the left turn signal for the left turn vehicle, and the vehicle is frequently stopped, resulting in inefficient problems.

In view of this, in recent years, a signal system for making an unprotected left turn without giving a left turn signal to a left turn vehicle at an intersection has been attempted. As such, when an unprotected left turn signal system is applied at an intersection, traffic congestion due to a left turn signal can be reduced, leading to smooth traffic flow.

However, if the unprotected left turn signal system is applied at the intersection as described above, the collision risk between the vehicle coming from the opposite lane and the unhobo left turn vehicle and the pedestrian accident using the pedestrian crosswalk may increase. Therefore, there is an urgent need to develop a signal control system that can prevent accidents and operate safely even under an unprotected left turn signal system.

The present invention has been made in view of the above, and an object thereof is to provide an unprotected left turn vehicle signal control system capable of safely inducing driving of an unprotected left turn vehicle.

An unprotected left turn vehicle signal control system of the present invention for achieving the above object comprises: a first sensing unit for sensing an unprotected left turn waiting vehicle at an intersection; A second sensing unit sensing a vehicle approaching an intersection; An output unit configured to recognize the information detected by the first and second detectors so that the driver of the vehicle approaching the intersection with the driver of the unprotected left-turn waiting vehicle can recognize the information; A control unit controlling the output unit based on the information detected by the first and second detection units; And a communication unit receiving the information detected by the first and second detection units and transmitting the received information to the control unit.

According to the unprotected left turn vehicle signal control system of the present invention, by detecting and notifying the unprotected left turn waiting vehicle at the intersection and the approach vehicle toward the intersection, it is possible to prevent traffic accidents caused by the unprotected left turn vehicle at the intersection.

The first sensing unit may include: a first wireless geomagnetic sensor provided in an intersection and buried in a waiting section partitioned so that an unprotected left-turning vehicle may wait; And a second wireless geomagnetic sensor embedded in the unprotected left turn waiting lane provided before entering the intersection to sense the vehicle.

The second sensing unit may include a plurality of wireless geomagnetic sensors embedded in a road at a position spaced apart from the intersection to sense an approach vehicle.

The communication unit may include: a plurality of repeaters performing short-range data communication wirelessly with the first and second detection units; An access point performing wireless short-range data communication with the repeaters to collect data, and transferring the collected information to the controller through wireless short-range data communication; It is good to include.

The output unit may include a video output unit which is supported by an unprotected left turn guidance display panel installed at the intersection and provides information to an unprotected left turn waiting vehicle and an approach vehicle to the intersection by text; An audio output unit installed together with the video output unit to output unprotected left turn vehicle information as a voice to a pedestrian crossing the pedestrian crosswalk; And an illumination output unit installed together with the video output unit and controlled to provide on / off driving light to the pedestrian crosswalk when the unprotected left turn waiting vehicle is identified for the crosswalk.

In addition, when it is determined that the unprotected left turn waiting vehicle is found in the first sensing unit, the controller compares whether the illuminance at the identified time point satisfies the reference value, and if the unprotected left turn waiting vehicle is less than the reference value, It is good to control to illuminate by driving the light output unit installed corresponding to the left pedestrian crosswalk subject to the left turn.

The video output unit may further include: a front video output unit configured to provide information about the presence or absence of an unprotected left turn waiting vehicle at the intersection so that a driver of a vehicle approaching the intersection may be identified; And a rear video output unit disposed on an opposite side of the front video output unit to provide an unprotected left turning waiting vehicle driver in the intersection with information on whether there is an approach vehicle approaching the intersection on the opposite road.

According to the unprotected left turn vehicle signal control system of the present invention, the unprotected left turn vehicle at the intersection to which the unprotected left turn signal lights are detected, the information on the unprotected left turn vehicle to the vehicle driver and pedestrian approaching the intersection based on the detected information. By providing a, it is possible to prevent an accident caused by an unprotected left turn vehicle.

In addition, by detecting the presence of a vehicle approaching the intersection in the air at the intersection for the unprotected left turn, by providing the detected information, the driver of the unprotected left turn vehicle can pay attention to the unprotected left turn to reduce the risk of accident There is this.

In addition, since pedestrians crossing the pedestrian crossing can provide information on the unprotected left turn waiting vehicle, the pedestrians can also pay attention to cross the pedestrian crossing to prevent accidents.

In addition, when the unprotected left turn waiting vehicle is checked at night, the unprotected pedestrian crossing the crosswalk by turning on the illumination output unit installed in response to the pedestrian crosswalk corresponding to the left turn direction of the left turn waiting vehicle to illuminate the crosswalk. By allowing the left-turning vehicle driver to check, there is an advantage to ensure the safety of pedestrians.

In addition, each of the first and second detection unit has a configuration including a wireless geomagnetic sensor embedded in the road, the installation of the detection unit is completed through a single buried operation can be simply installed, separate power and It can be installed and used without the need to connect signal cables, so it is easy to maintain and manage.

1 is a schematic configuration diagram illustrating an unprotected left turn vehicle signal control system according to an exemplary embodiment of the present invention.
2 is a block diagram illustrating an unprotected left turn vehicle signal control system according to an exemplary embodiment of the present invention.
FIG. 3 is a schematic diagram for describing the wireless geomagnetic sensor illustrated in FIG. 2.
4 is a schematic diagram illustrating a situation of an output unit when there is no unprotected left turn waiting vehicle.
5 is a diagram illustrating a situation of an output unit when there is an unhobo left turn waiting vehicle at night.
6 is a diagram illustrating an intersection situation when there is no unprotected left turn waiting vehicle.
7 is a flowchart illustrating a control method of an unprotected left turn vehicle signal control system according to an exemplary embodiment of the present invention.

Hereinafter, an unprotected left turn vehicle signal control system according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, the unprotected left turn vehicle signal control system according to an exemplary embodiment of the present invention includes a first sensing unit 100 and an intersection 10 for detecting an unprotected left turn waiting vehicle at an intersection 10. Receives and receives a signal of each of the second sensing unit 200 and the first sensing unit 100 and the second sensing unit 200, which detects a vehicle approaching the intersection 10 at a point away from the predetermined distance. And outputting the information acquired by the communication unit 300 and the first and second detection units 100 and 200 to transmit the received signal so that the left-turn waiting vehicle driver, the straight vehicle driver and the pedestrian can recognize the information. An output unit 400 and a control unit 500 for controlling to provide the guide information through the output unit 400 on the basis of the information obtained through the communication unit 300.

Here, the intersection 10 is described as an example of a four-way intersection. The intersection 10 is provided with a traffic light 20 for controlling the straight running of the vehicle, and a guide plate 30 for informing that the vehicle is an unprotected left turn area. In addition, pedestrian crosswalks 41, 42, 43, and 44 for pedestrians may be installed around the intersection 10. In addition, the intersection 10 is provided with left turning waiting lanes 51, 52, 53, and 54 for the unprotected left turning waiting vehicle, ahead of the pedestrian crosswalks 41, 42, 43, 44, and further, an unprotected left turning waiting vehicle. The unprotected left turn waiting vehicle waiting section (61, 62, 63, 64) also passes through the pedestrian crosswalk (41, 42, 43, 44) to reduce the obstruction of the straight vehicle and to make a quick unprotected left turn. (Hereinafter referred to as the 'air gauge'). The waiting sections 61, 62, 63, and 64 may be displayed on the floor as a predetermined area in sections within the intersection 10 outside the pedestrian crossings 41, 42, 43, and 44, and are sections for unprotected left-turning vehicles. It may be partitioned so as to be shifted to the left side based on the vehicle traveling direction so as to be easily recognized.

The first detecting unit 100 includes a first wireless geomagnetic sensor 110 for detecting a vehicle waiting in the waiting sections 61, 62, 63, and 64, and the left turning waiting lanes 51, 52, 53, And a second wireless geomagnetic sensor 120 for detecting a vehicle waiting at 54. Each of the first and second wireless geomagnetic sensors 110 and 120 may be provided in plural numbers, and the number of the first and second wireless geomagnetic sensors 110 and 120 is not limited. The first and second wireless geomagnetic sensors 110 and 120 are embedded on the road with their own batteries therein to detect the presence or absence of a vehicle through a change in magnetic force when the vehicle approaches, and a specific example thereof is shown in FIG. 3. Is shown.

3 illustrates a first wireless geomagnetic sensor 110 on behalf of the first and second wireless geomagnetic sensors 110 and 120 having the same configuration. Referring to FIG. 3, the first wireless geomagnetic sensor 110 includes a housing 111, a battery 113 installed in the housing 111, an antenna 115, and a sensor circuit unit 117. The housing 111 is formed of a waterproof, durable material such as a polymer material to protect internal components from moisture such as rain and snow. The antenna 115 is installed to enable data communication to and from the housing 111. The sensor circuit unit 117 is composed of a circuit board, and the sensor circuit unit 117 includes a magnetic sensing unit for sensing a vehicle, a microcontroller, and a Zigbee transceiver. The microcontroller controls the components in the housing 111 as a whole and controls the vehicle detection signal from the magnetic sensing unit to be transmitted to the communication unit 300 through the Zigbee transceiver.

The second detecting unit 200 is for detecting a vehicle approaching toward the intersection 10 in advance, and is installed in each lane of each road at a position spaced approximately 100 m or more from the intersection 10 to install the approach vehicle. It detects in advance. Like the first sensing unit 100, the second sensing unit 200 may also include a plurality of wireless geomagnetic sensors 210, 220, 230, 240,..., Which are installed for each of a plurality of roads connected to the intersection 10. . The plurality of wireless geomagnetic sensors 210, 220, 230, 240, ... have the same configuration as the first wireless geomagnetic sensor 110 as described with reference to FIG. Accordingly, the second detection unit 200 detects a vehicle approaching the intersection 10 and transmits the detection information to the communication unit 300 through wireless Zigbee communication.

The communication unit 300 receives the detection signals sensed by the first and second detection units 100 and 200 through wireless communication, preferably through short-range Zigbee wireless communication, and transmits the received information to the control unit 500. Is to deliver. The communication unit 300 includes an access point 310 and a plurality of repeaters 320 and 330 capable of ZigBee communication based on the first and second detection units 100 and 200.

The repeaters 510 and 520 are installed to serve as bridges to enable short-range data communication between the access point 310 and the first and second sensing units 100 and 200. Data is transmitted between the repeaters 510 and 520 through short-range data communication so that the data can be aggregated to the access point 310.

The access point 310 is installed to communicate data directly with the first and second sensing units 100 and 200 or indirectly through the repeaters 320 and 330, and the information detected by the first and second sensing units 100 and 200. Receives the role serves to provide to the control unit 500.

The output unit 400 includes a video output unit 410, an audio output unit 420, and an illumination output unit 430.

The video output unit 410 is preferably an LED display board, and has a front video output unit 411 and a rear video output unit 412.

The front video output unit 411 may provide the straight ahead vehicle approaching the intersection 10 with information about the presence of an unprotected left turn waiting vehicle on the opposite side of the intersection 10. For example, when the front video output unit 411 displays 'vehicle waiting', as shown in the lower left of FIG. 1, the front video output unit 411 displays the left turn waiting section 63 or the left turn waiting lane 53 opposite to the intersection 10. The driver of the straight ahead vehicle confirms that the unprotected left turn waiting vehicle 1 is waiting, and can slowly slow down or stop when approaching the intersection 10, thereby preventing a collision accident at the intersection 10. .

In addition, the rear video output unit 412 provides the driver of the unprotected left turn waiting vehicle 1 with information about whether the vehicle approaches the intersection 10 in the opposite lane. For example, when the rear video output unit 412 shows 'the vehicle approaching', the driver may approach the intersection 10 in the straight lane in the driver's line of sight of the left-turning waiting vehicle 1 of the intersection 20 and the vehicle may be approached. The driver of the unprotected left turn waiting vehicle 1 can confirm that there is. Accordingly, the driver of the left turn waiting vehicle 1 can make an unprotected left turn while waiting for the vehicle approaching the intersection 10 to pass or stop without proceeding an unprotected left turn at the intersection 10, or be careful. In addition, the collision between cars can be prevented.

The video output unit 410 having the above configuration may be installed on a traffic light support pole on which a traffic light is installed, or is installed on the guide display board 30 indicating the unprotected left turn position. Therefore, the drivers can check the information display panel 30 and at the same time check the information related to the unprotected left turn vehicle signal provided through the video output unit 410 and can drive carefully at the intersection 10.

The audio output unit 420 may include a speaker installed in the video output unit 410. Through the audio output unit 420, the pedestrians crossing the pedestrian crosswalks 41, 42, 43, and 44 are provided with voice messages as guidance information on the unprotected left turn waiting vehicle at the intersection 20. . For example, when there is no unprotected left turn waiting vehicle, as illustrated in FIG. 4, the audio output unit 420 may voice a voice saying, 'There is no approaching vehicle and no unprotected left turn waiting vehicle.' Can be.

On the contrary, when it is detected that there is an unprotected left turn waiting vehicle for the crosswalk 42, as shown in FIG. 5, the text “car approaching” is displayed on the video output unit 410. Through the audio output unit 420 'Please note that the vehicle is currently approaching.' Or, you can provide announcements such as "Attention, there's an unprotected vehicle waiting." Therefore, people crossing the pedestrian crosswalk 44 listens to the guidance message provided through the audio output unit 420 and uses the crosswalk 44, so that they can safely cross the unprotected left turn vehicle.

The lighting output unit 430 may include a plurality of LED (LED) lights installed under the video output unit 410. The illumination output unit 430 maintains the off state when there is no unprotected left turn waiting vehicle as shown in FIG. 4, and when there is an unprotected left turn waiting vehicle as shown in FIG. Providing a pedestrian crossing the crosswalk 44 allows unprotected left turn waiting (progress) vehicles from afar. In particular, it is difficult to identify pedestrians crossing the pedestrian crosswalk at night, as well as unprotected left turn vehicles at night, so when the unprotected left turn waiting vehicle is detected and the approaching vehicle is detected in each situation By turning on the output unit 430 to brighten the pedestrian crosswalk 44, the driver can check whether the pedestrian is crossing the crosswalk 44 to slow down or stop to prevent the safety accident of the pedestrian. . Of course, the lighting output unit 430 may be controlled to blink repeatedly in a vehicle approach situation may cause a driver to be alert to induce slow motion.

The control unit 500 receives the vehicle detection signal through the communication unit 300 and based on the received information, respectively, the video output unit 410, the audio output unit 420, and the light output unit 430. Independent driving control outputs the guide information. The controller 500 may include the communication unit 300, that is, the data receiver 510 capable of short-range data communication with the access point 310. Accordingly, the control unit 500 may receive the detection information of the vehicle through the data receiver 510 through the Zigbee wireless communication with the access point 310, and the video output unit 410 based on the received detection information. The audio output unit 420 and the lighting output unit 430 can be driven independently. The data receiver 510 performs wireless communication through the antenna 520.

An unprotected left turn vehicle signal control method using an unprotected left turn vehicle signal control system according to an embodiment of the present invention having the above configuration will be described in detail below with reference to FIGS. 1 to 7.

First, the first sensing unit 100 and the second sensing unit 200 detect a vehicle in a state of being embedded in a road. That is, the first detection unit 100 detects a vehicle waiting for an unprotected left turn, and the second detection unit 200 detects a vehicle approaching toward the intersection 10, respectively. When the vehicle is detected by the first and second detection units 100 and 200, the detected information is transmitted to the control unit 500 through the communication unit 300.

Therefore, the controller 500 may check whether the unprotected left turn waiting vehicle is detected through data communication with the communication unit 300 (S10).

That is, as shown in FIG. 1, when the unprotected left turn waiting vehicle 1 is waiting in the unprotected left turn waiting section 63, it is possible to confirm that the unprotected left turn proxy vehicle is detected in step S10.

Then, the control unit 500 uses the front video output unit 411 of the video output unit 410 opposite to the standby section 63 where the standby vehicle 1 is found, that is, on the opposite side. For example, the phrase 'in vehicle waiting' is output (S11). When the "progress caution phrase", "in vehicle waiting", is output through the front video output unit 411 as described above, the driver of the vehicle approaching the intersection 10 while looking at the front video output unit 411 may enter the intersection ( Check that the unprotected left turn waiting vehicle (1) is confirmed in 10), and it is possible to prevent a collision accident with the unprotected left turn waiting vehicle (1) in advance by driving slowly or stopping.

In addition, when it is determined that the left turn waiting vehicle is waiting, the controller 500 outputs "pedestrian voice guidance" to pedestrians crossing through the pedestrian crosswalk 44 located in the direction in which the unprotected left turn waiting vehicle 1 is to turn left. It is made (S12). That is, the controller 500 controls to output, for example, "pedestrian voice guidance" such as "Attention, the unprotected vehicle is waiting" through the audio output unit 420 installed corresponding to the pedestrian crosswalk. In addition, pedestrians can identify unprotected left-turn vehicles and encourage them to cross pedestrian crossings with caution.

In addition, the control unit 500 checks the illuminance of the intersection through the illuminance sensor not shown, and confirms whether or not the illuminance is less than the reference value (S13). That is, the control unit 500 may check the illuminance of the illuminance sensor to determine whether it is in a bad time (environment such as fog, heavy rain, etc.) that falls within a certain illuminance even during the daytime, nighttime, or daytime time.

If the illuminance detected in the step S13 does not reach the reference value, the controller 500 turns on the lighting output unit 430 to provide the illumination light to the pedestrian crosswalk 44 (S14). As such, by illuminating the crosswalk 44 by driving the light output unit 430 on in a dark situation, the driver of the unprotected left-turn vehicle 1 may turn left and check whether there is a pedestrian in the pedestrian crosswalk 44. This will prevent pedestrian safety accidents. Of course, even the driver of the straight vehicle can check the pedestrian crossing usage situation in advance from afar, thereby preventing pedestrian traffic accidents in the pedestrian crossing.

In addition, the controller 500 may check whether the approach vehicle is detected by the second sensing unit 200 through the information transmitted through the communication unit 300 (S15).

When it is confirmed that there is a vehicle approaching toward the intersection 10 in step S15, the control unit 500 uses the rear video output unit 412 of the video output unit 410 installed on the side of the road where the approach vehicle is detected. For example, it controls to output a "progressional statement" such as "in approaching the vehicle" (S16). Accordingly, the driver of the waiting vehicle (1) waiting for an unprotected left turn in the opposite lane of the road where the approaching vehicle is detected, checks the "progressive attention statement" provided through the rear video output unit 412, and the vehicle moves toward the intersection 10. It is confirmed that the approaching, can be operated carefully when the left turn unprotected, it is possible to prevent the collision accident at the intersection (10).

As described above, the unprotected left turn vehicle signal control system according to the embodiment of the present invention is applicable to all intersections (3, 4, 5, etc.) equipped with an unprotected left turn signal light, the intersection 10 when applied It is installed on each road that meets and induces the safe operation of an unprotected left turn waiting vehicle at the intersection, and can prevent a collision accident and a pedestrian safety accident.

In the above description, the output unit 400 is controlled by the control signal of the control unit 500 that has received the sensing data through the communication unit 300, but has been described as an example. In addition, through the power line communication with the intersection signal controller, Not only power supply but also a control signal can be transmitted to control the configuration.

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the present invention is not limited to the specific embodiments of the present invention without departing from the spirit of the present invention as claimed in the claims. Anyone skilled in the art can make various modifications, as well as such modifications are within the scope of the claims.

10. Intersection 20. Traffic lights
30... Information board 100..First detection unit
110,120. First and second wireless geomagnetic sensor 200. Second detection unit
210,220,230,240..Wireless geomagnetic sensor 300..Communication department
310 ... Access point 320,330 ... repeater
400. Output 410. Video output
420..Audio output 430..Light output
500. Controller 510. Antenna
520..Data receiver

Claims (7)

A first sensing unit for sensing an unprotected left turn waiting vehicle at an intersection;
A second sensing unit sensing a vehicle approaching an intersection;
An output unit configured to recognize the information detected by the first and second detectors so that the driver of the vehicle approaching the intersection with the driver of the unprotected left-turn waiting vehicle can recognize the information;
A control unit controlling the output unit based on the information detected by the first and second detection units; And
And a communication unit receiving the information detected by the first and second detection units and transmitting the received information to the control unit. The method of claim 1, wherein the first detection unit,
A first wireless geomagnetic sensor provided in an intersection and embedded in an waiting section provided to be partitioned so that an unprotected left-turning vehicle can wait; And
And a second wireless geomagnetic sensor embedded in the unprotected left turn waiting lane provided before entering the intersection to sense the vehicle. The method of claim 2, wherein the second detection unit,
And a plurality of wireless geomagnetic sensors embedded in a road at a position spaced apart from the intersection to detect an approaching vehicle. The communication unit according to any one of claims 1 to 3, wherein
A plurality of repeaters wirelessly performing short-range data communication with the first and second sensing units;
An access point performing wireless short-range data communication with the repeaters to collect data, and transferring the collected information to the controller through wireless short-range data communication; Unprotected left turn vehicle signal control system comprising a. According to any one of claims 1 to 3, The output unit,
A video output unit which is supported by an unprotected left turn guide plate installed at the intersection and provides information to an unprotected left turn waiting vehicle and an approach vehicle to an intersection by text;
An audio output unit installed together with the video output unit to output unprotected left turn vehicle information as a voice to a pedestrian crossing the pedestrian crosswalk; And
An unprotected light output unit installed together with the video output unit and controlled to provide on / off driving light to the pedestrian crosswalk when the unprotected left turn waiting vehicle is identified for the crosswalk. Left turn vehicle signal control system. 6. The apparatus of claim 5,
When it is confirmed that the unprotected left turn waiting vehicle is found in the first detection unit, the illuminance at the identified time point is satisfied to meet the reference value. The unprotected left turn vehicle signal control system, characterized in that the control to illuminate the light by driving the lighting output unit is installed correspondingly. The method of claim 5, wherein the video output unit,
A front video output unit providing information on the presence or absence of an unprotected left turn waiting vehicle at the intersection so that a driver of a vehicle approaching the intersection may be identified;
A rear video output unit disposed on an opposite side of the front video output unit and configured to provide an unprotected left turn waiting vehicle driver in the intersection with information on the presence or absence of an approach vehicle approaching the intersection on the opposite road; Unprotected left turn vehicle signal control system.

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