KR100715038B1 - Apparatus and method for controlling traffic signal - Google Patents

Abstract

An apparatus and a method for controlling a traffic signal controller by a wireless control signal according to collected traffic information are disclosed. The present invention relates to a traffic signal control method for a traffic light by a plurality of controllers, comprising the steps of wirelessly receiving a traffic light control signal for controlling a traffic light, detecting an identification code in the received traffic light control signal, Detecting a signal conversion data of the signal or the like in the signal light control signal by any one of a plurality of controllers having a code and controlling the signal conversion of the signal or the like by the detected signal conversion data, to provide. The present invention also provides a traffic signal control apparatus for a traffic light such as a traffic light by a plurality of controllers, comprising: means for wirelessly receiving a traffic light control signal for controlling a traffic light; means for detecting an identification code in the received traffic light control signal; A means for detecting signal conversion data in the signal light control signal by any one of a plurality of controllers having the same code as the code and means for controlling the signal conversion of the signal light by the detected signal conversion data, Lt; / RTI > Therefore, in the present invention, a plurality of traffic signal controllers are provided with respective identification IDs, and the traffic control center wirelessly transmits control signals including the identification IDs so that the plurality of traffic signal controllers control the signal conversion cycle of the traffic lights It is possible to greatly reduce the cost compared with the system construction by a dedicated line.

Traffic information, traffic control center, traffic signal controller, traffic light

Description

TECHNICAL FIELD [0001] The present invention relates to a traffic signal control apparatus,

1 is a block diagram of a configuration of a traffic signal control apparatus according to the present invention;

2A illustrates an embodiment of a time synchronization information format according to the present invention;

Figure 2B illustrates an embodiment of a signal control information format according to the present invention;

3 is a flow chart for performing traffic signal control according to the present invention.

Fig. 4 schematically shows the construction of an intersection and a crosswalk of a general road; Fig.

Description of the Related Art

100: Traffic Control Center

102: first radio signal transmitting / receiving antenna

110-1 to 110-N: First to Nth traffic signal controllers

112: second wireless signal transmission / reception antenna

114: radio signal transmitting /

116: Processor

The present invention relates to a traffic signal control apparatus and method, and more particularly, to an apparatus and method for controlling a traffic signal controller by a wireless control signal according to collected traffic information.

Compared to the population increase, the vehicle is increasing exponentially, and the traffic congestion caused by the increase of the vehicle is causing serious problem.

The following table shows the stagnation rates according to the causes of existing roads.

division Intersection waiting Vehicle congestion crosswalk Other Stop Rate downtown 81.49 12.75 5.72 0.04 38.59 cycle 56.97 26.65 14.06 2.33 27.45 City high speed 52.33 44.1 2.43 1.14 9.2 radiation 66.71 18.03 14.81 0.44 28.77 Lattice type 71.25 15.89 12.4 0.45 32.5 high speed 0 100 0 0 2.89 New city 70.53 14.85 13.31 1.31 19.97 Outside averages 67.1 19.04 13.1 0.75 28.3 Overall average 68.24 18.55 12.52 0.69 29.9

As shown in the above table, the vehicle stopping time exceeds 30% at intersections and crosswalks in the city center. Therefore, a new traffic signal system (hereinafter referred to as a new signal system) is introduced as a means for improving the progress of the vehicle through signal cycle control at intersections and crosswalks.

The new signal system is a field combining advanced traffic information system (ATIS) and advanced traffic management system (ATMS) to maximize existing road network.

In other words, the new signal system collects traffic information on the road and links the signal cycle based on the information to shorten the waiting time of the vehicle at the intersection or the crosswalk and improve the communication.

Traffic information for calculating the basic data necessary for operating the new signal system as described above includes traffic volume of the road section, occupancy of the queue, and vehicle average speed of the road section.

Here, the traffic information for calculating the basic data necessary for the operation of the new signal system is collected and analyzed in the traffic information collection device mounted on the vehicle such as the road and the traffic information related to the vehicle concerned. And processed.

The collected traffic information is transmitted to the traffic information control center, and the traffic control center outputs a control signal for controlling the signal conversion period of the traffic signal controller according to the collected traffic information.

The traffic signal controller is connected to the traffic control center and performs signal conversion according to the control signal outputted from the traffic control center to control the flow of the vehicle.

At this time, the traffic signal controller is connected to a traffic control center through a dedicated line. Generally, only a traffic signal installed in a main road area such as an intersection is connected to a traffic control center.                         

The traffic signal controller installed outside the main road area such as the intersection is set to have a constant cycle of performing the signal conversion operation and signal conversion is performed according to the predetermined cycle to control the flow of the vehicle. That is, the traffic signal controller other than the traffic signal controller connected to the traffic control center operates independently of the control of the traffic control center.

As described above, conventionally, only a traffic signal connected to a traffic control center through a dedicated line controls a signal conversion operation of a traffic signal controller according to traffic information for collection according to a traffic situation to control a traffic flow of the vehicle, Since the signal conversion operation is performed by the predetermined signal conversion cycle, signal control of the entire traffic signal can not be performed and the flow of the smooth vehicle can not be controlled.

Also, in order to control the traffic signals of the entire traffic signal controller, it is very costly to connect all the traffic signal controllers to the traffic control center.

In addition, since the traffic signal controller connected to the traffic control center by a dedicated line and the traffic signal controller not connected to the traffic control center are controlled in different manners, synchronization of the traffic signal control period is difficult.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a traffic signal control system and a traffic signal control method for controlling a traffic signal controller, And an object of the present invention is to provide an apparatus and method.

It is another object of the present invention to provide a traffic signal control apparatus and method for easily synchronizing all traffic signal controllers by a control signal output from a traffic control center.

According to another aspect of the present invention, there is provided a traffic signal control method for a traffic light of a plurality of controllers, including the steps of wirelessly receiving a traffic light control signal for controlling a traffic light, detecting an identification code in the received traffic light control signal , Detecting the signal conversion data of the signal lamp in the signal lamp control signal by any one of a plurality of controllers having the same code as the detected identification code, and controlling the signal conversion of the signal lamp by the detected signal conversion data A traffic signal control method according to the present invention.

Another aspect of the present invention is to provide a traffic signal control method including a plurality of traffic signal control signals including synchronization information for synchronizing time of a controller and signal conversion control information for controlling a signal conversion period of a signal controlled by the controller have.

According to another aspect of the present invention, there is provided a traffic signal control method for controlling a traffic light by a plurality of controllers, the method comprising: receiving traffic situation information from a certain vehicle; calculating traffic light control data according to received traffic situation information; And wirelessly transmitting a traffic light control signal including a controller identification code to the calculated control data.

According to another aspect of the present invention, there is provided a traffic signal control apparatus for a traffic light by a plurality of controllers, comprising: means for wirelessly receiving a traffic light control signal for controlling a traffic light; means for detecting an identification code in a wirelessly received traffic light control signal; Means for detecting signal conversion data in the signal light control signal by any one of a plurality of controllers having the same code as the identification code, and means for controlling signal conversion of the signal light by the detected signal conversion data And a control device.

According to another aspect of the present invention, there is provided a traffic signal control apparatus for controlling a plurality of traffic lights, comprising: an antenna for wirelessly receiving a traffic light control signal for controlling a traffic light; an identification ID for a traffic light control signal received through the antenna; And a processor for selectively detecting signal-converted signal data of the signal-light control signal in accordance with the detected signal-converted data and outputting the detected signal-converted data to a signal lamp.

According to another aspect of the present invention, there is provided a traffic signal control method for a traffic light by a plurality of controllers, the method comprising the steps of wirelessly transmitting anomalous state information of a plurality of controllers or a traffic light abnormal state information to a traffic control center for controlling a plurality of controllers, Receiving an abnormal state control signal for controlling an abnormal state in any one of a plurality of controllers having the same identification code as the identification code in the abnormal state information, And controlling the state of the traffic signal.

According to another aspect of the present invention, there is provided a traffic signal control apparatus for controlling signal conversion of a traffic light by a plurality of controllers, the traffic signal control apparatus comprising: means for wirelessly transmitting abnormality status information or signal status information of a plurality of controllers; A means for wirelessly receiving an abnormal state control signal for controlling a controller or a traffic light, and means for controlling an abnormal state of a controller or a traffic light according to a wirelessly received abnormal state control signal.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a traffic signal control apparatus according to the present invention. FIG. 2 is a block diagram of a time synchronization information format according to an embodiment of the present invention. Fig. 3 is a flowchart for performing traffic signal control according to the present invention. However, the present invention is not limited or limited by the following examples.

1, a traffic signal control apparatus according to the present invention includes a first wireless signal transmission / reception antenna 102, a traffic control center 100, and first to Nth traffic signal controllers 110-1 to 110-N. , 110-N.

The first traffic signal controller 110-1 includes a second wireless signal transmission / reception antenna 112, a wireless signal transmission / reception unit 114, a processor 116, and a plurality of traffic lights 118-1, 118-2, And the other traffic signal controller is configured to have the same internal configuration as the first traffic signal controller 110-1.

The traffic control device according to the present invention receives collection traffic information from a certain traffic information collection device and wirelessly transmits a control signal according to the input collection traffic information through a first wireless signal transmission and reception antenna 102 The traffic control center 100 and the traffic control center 100 for receiving the status information of the controller and the traffic light transmitted from the first to Nth traffic signal controllers 110-1 to 110- The first to Nth traffic signal controllers 110-1 to 110-N for transmitting the control signals to the traffic control center 100 to perform signal conversion operations according to the control signals or to transmit abnormal state information of the controller internal state and multiple signals to the traffic control center 100, ..., 110-N.

The first traffic signal controller 110-1 receives the control signal transmitted from the traffic control center 100 or receives the control signal transmitted from the first traffic signal controller 100-1 and a plurality of traffic lights 118-1, 2, ...), a second wireless signal transmission / reception antenna 112 for transmitting information on the operation state of the controller itself and a plurality of traffic lights, And a processor 116 for performing signal conversion of the plurality of signal lamps 118-1, 118-2, ... in accordance with the converted control signal, and the other The traffic signal controller also has the same configuration.

At this time, the first to Nth traffic signal controllers 110-1 to 110-N are distinguished from the control signals transmitted through the first radio signal transmitting / receiving antenna 102 at the traffic control center 100 ID " for < / RTI > The first to Nth traffic signals 110-1 to 110-N output from the first to Nth traffic signal controllers 110-1 to 110-N to the traffic control center 100 through the second wireless signal transmission / The signal controllers 110-1, ..., 110-N and the plurality of signal lamp operation status signals are also configured including the identification ID.

The operation of the traffic signal control apparatus according to the present invention will now be described.

The traffic control center 100 receives traffic situation information transmitted from a traffic information collection device installed in a probe car (not shown) through a certain network. The network may be, for example, a PCS network, a cellular network, a digital data communication network, the Internet, a TRS network, or the like.

Then, the traffic control center 100 grasps a traffic situation of a certain area according to the traffic situation information input through the network, and transmits a control signal for controlling the flow of the vehicle to the first radio signal transmission / (102).

At this time, the control signal outputted wirelessly has a format as shown in FIG.

The control signal output from the traffic control center 100 is synchronized with the time synchronization information shown in FIG. 2A for synchronizing the time of the first to Nth traffic signal controllers 110-1 to 110-N, And signal control information as shown in FIG. 2B for controlling signal conversion periods of the N-th traffic signal controllers 110-1,..., 110-N.                     

2A, the time synchronization information includes classification data 200 for distinguishing whether the control signal is information for time synchronization control or information for signal control, and first to Nth traffic signal controllers 110 The time data 202, which is information for eliminating a time error between the first to Nth traffic signal controllers 110-1, ..., and 110-N, . The time synchronization information is transmitted every predetermined period to reset the time stored in the first to Nth traffic signal controllers 110-1 to 110-N, The time is provided in seconds in the range of 00000 to 86400 (= 24 hours x 60 minutes x 60 seconds) per day.

The synchronization of the first to Nth traffic signal controllers 110-1 to 110-N can be synchronized by the above-described time synchronization information, and the plurality of traffic lights 118-1, 118-2,. ... are also controlled to be interlocked.

As shown in FIG. 2B, the signal control information includes division data 210 for distinguishing between time synchronization control information and signal control information, start time data 212 having start time information on which signal conversion operation is performed, The controller ID data 214 having the identification IDs of the first to Nth traffic signal controllers 110-1 to 110-N, the first to Nth traffic signal controllers 110-1 to 110- The signal lamp number data 216 for selecting the plurality of signal lamps 118-1, 118-2, ... controlled by the signal lamps 110-1 to 110-N, the signal lamps 118-1, 118-2, Signal sequence data 218 for the sequence and signal period data for the hold time of the varied signal.

Here, the order in which the signals are changed according to the signal sequence data is as follows: stop -> left turn -> straight -> stop, stop -> straight -> stop, stop -> left turn -> stop -> straight -> stop And converts the signals of the plurality of signal lamps 118-1, 118-2, ... by the system.

As described above, the control signals output from the traffic control center 100 include identification IDs for selectively transmitting signals to the first through Nth traffic signal controllers 110-1 through 110-N The first through the N-th traffic signal controllers 110-1 through 110-N receive the identification IDs included in the control signals and the first through Nth traffic signal controllers 110-1 through 110-N. , 110-N are identical to each other.

That is, when the control signal includes the identification ID of the first traffic signal controller 110-1, the first traffic signal controller 110-1 is wirelessly transmitted through the second wireless signal transmission / reception antenna 112 And receives a control signal.

The wireless signal transceiver 114 of the first traffic signal controller 110-1 processes the control signal received through the second wireless signal transceiver antenna 112 and outputs the signal to the processor 116, And selectively controls the signal conversion operation of the plurality of signal lamps 118-1, 118-2, ... according to the signal.

The traffic signal control method of the first to Nth traffic signal controllers 110-1 to 110-N according to the wireless control signal transmitted from the traffic control center 100 will be described with reference to FIG. Will be described in detail.

First, the traffic control center 100 inputs traffic situation information according to the traffic conditions of each road from a traffic collecting device (not shown) provided in a probing car or the like (S300).

Here, the traffic situation information input to the traffic control center 100 is, for example, information such as the speed, position, queue, and the like of the vehicle.

The traffic control center 100 generates a control signal for controlling the traffic flow of the current vehicle according to the traffic situation information and transmits the generated control signal through the first wireless signal transmission / reception antenna 102 wirelessly (S302).

Here, the control signal generation in the traffic control center 100 will be described with reference to the accompanying drawings.

Fig. 4 is a view schematically showing the configuration of an intersection and a crosswalk of a general road, in which a signal light controlled by one controller includes a plurality of signal lamps for controlling the flow of the vehicle at an intersection and four crosswalks A plurality of signal lamps for controlling the flow of passengers are constituted.

When the vehicle to be straightened at the first intersection 400 increases and the speed of the vehicle in which the traffic condition information is collected decreases and the calculated queue length becomes longer, A control signal for delaying a signal in a stagnant direction is calculated and transmitted.

2, the first to Nth traffic signal controllers 110-1 to 110-N for controlling signal conversion operations according to the traffic control center 100 Time synchronization information for eliminating a time error, and signal control information including each identification ID.

Here, the first to Nth traffic signal controllers 110-1 to 110-N are configured to have respective identification IDs.                     

The first to Nth traffic signal controllers 110-1 to 110-N having the same ID as the identification ID in the control signal transmitted from the traffic control center 100 selectively receive the control signal (S304 ).

Next, the signal conversion operation of each signal is performed by the operation of the first to Nth traffic signal controllers 110-1 to 110-N having the same ID as the identification ID in the control signal (S306).

For example, when the traffic control center 100 transmits a control signal including the identification ID of the first traffic signal controller 110-1 to control the first traffic signal controller 110-1, The signal controller 110-1 receives a radio control signal transmitted through the second radio signal transmitting / receiving antenna 112. [

The control signal received through the second wireless signal transmission and reception antenna 112 is converted into a signal by the wireless signal transmission and reception unit 114 for signal processing in the first traffic signal controller 110-1 and then transmitted to the processor 116 Output.

The processor 116 controls the signal conversion cycle of the plurality of signal lamps 118-1, 118-2, ... controlled by the first traffic signal controller 110-1 by the signal-converted control signal.

That is, the processor 116 of the first traffic signal controller 110-1 controls the signal conversion period of the plurality of signal lamps 118-1, 118-2, ... according to the signal control information. For example, the signal conversion order of the first signal lamp 118-1 is controlled in the order of stop -> left turn -> straight ahead -> stop.                     

Therefore, when the number of vehicles increases and congestion occurs, control is exercised so that more vehicles can be moved by adjusting the cycle of signal conversion such as straight ahead or left turn.

At this time, the processor 116 of the first traffic signal controller 110-1 transmits the time data 202 based on the time synchronization information of the received control signal to another traffic signal controller controlled by the traffic control center 100 Synchronize.

That is, when the straight line signal of the first crosswalk 410 of the first intersection 400 of FIG. 4 is given long, the straight line signal of the second crosswalk 420 of the second intersection is also long, As shown in FIG.

In addition, the first to Nth traffic signal controllers 110-1 to 110-N perform signal processing in the radio signal transmitting and receiving section 114, such as an abnormal operation inside the controller or an abnormal state of a plurality of signals, Through the second radio signal transmission / reception antenna 112 through the second radio signal transmission / reception antenna 112.

The traffic control center 100 receives the abnormal state information of the abnormalities inside the controller or the plurality of signal lamps 118-1, 118-2, ... through the first radio signal transmitting / receiving antenna 102, N traffic signal controllers 110-1,..., 110-N and detects control signals of the first to Nth traffic signal controllers 110-1, ..., 110- .

It is obvious that the traffic signal control apparatus and method according to the present invention can set not only the signal conversion cycle of the signal controlled by the wireless signal lamp control signal but also the signal conversion time point.

A traffic signal control apparatus and method according to the present invention wirelessly transmits a traffic information control signal including an identification ID at a traffic control center to control traffic by collecting traffic information, The traffic signal controller having the same ID as the identification ID of the control signal selectively receives the signal and controls the signal conversion period of the signal.

According to the present invention, in the plurality of traffic signal controllers, the abnormal state information of the internal or multiple signals is transmitted to the traffic control center, and a control signal for controlling the abnormal state in the traffic control center by the transmitted abnormal state information And transmits it to a plurality of traffic signal controllers to control an abnormal state.

Therefore, in the present invention, a plurality of traffic signal controllers are provided with respective identification IDs, and the traffic control center wirelessly transmits control signals including the identification IDs so that the plurality of traffic signal controllers control the signal conversion cycle of the traffic lights So that it is possible to significantly reduce the cost compared to the system construction by a dedicated line.

In addition, since a traffic control center and a plurality of traffic signal controllers are easily installed by radio, one traffic control center can control more traffic signal controllers.

In addition, since synchronization of a plurality of traffic signal control periods can be controlled by transmitting information including a synchronization signal to a control signal output from a traffic control center, it is possible to efficiently perform signal control on a vehicle flow change have.

In addition, the traffic control center can detect an abnormal state of the traffic signal controller based on the abnormal state information of the wireless transmitted from the plurality of traffic signal controllers, so that the control can be efficiently performed.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

Claims (16)

delete delete delete delete delete delete A traffic signal control method for controlling a traffic light by a plurality of controllers, Receiving traffic situation information from a certain probing vehicle; Calculating traffic light control data according to the received traffic situation information; And wirelessly transmitting a signal lamp control signal including the controller identification code to the calculated control data And a traffic signal control method. 8. The method of claim 7, Wherein the traffic condition information includes a traffic volume, a traveling speed of each road link, a queue length, and the like. 8. The method of claim 7, And a signal conversion control information for controlling the signal conversion of the traffic light control signal to synchronize the time of the controller and the signal to be controlled by the controller. 10. The method of claim 9, Wherein the synchronization information includes discrimination data for discriminating whether the signal lamp control signal is synchronous information or signal conversion control information, and time data for eliminating a time error of the plurality of control periods. 11. The method of claim 10, Wherein the time data is provided in units of seconds based on one day. delete A traffic signal control device for controlling signal conversion of a traffic light by a plurality of controllers, Means for receiving traffic situation information from a certain probing vehicle; Means for calculating traffic light control data according to the received traffic situation information; And means for wirelessly transmitting traffic light control data including the controller identification code to the calculated signal light control data The traffic signal control device comprising: delete delete delete

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