KR20060098701A - A traffic signal control data transmit and receive instrument and implementation using localized low power fm additional information broadcast - Google Patents

Abstract

The present invention relates to an apparatus for transmitting and receiving traffic light control data using FM information broadcasting and an implementation method thereof.

The present invention largely controls the part of the device which modulates and transmits the traffic light control data in the form of FM information broadcasting and controls the traffic lights required by the receiver in consideration of its geographical position information and the direction of the FM radio wave from the receiver. An apparatus and method for taking only data and presenting it visually to a user are proposed.

According to the present invention, instead of performing general large output FM transmission as in the conventional FM additional information broadcasting method, by using local small output FM transmission method, even if only one frequency channel is used, reception areas do not overlap each other at each point. The present invention proposes a method for transmitting data without a change of frequency at the receiver side and easily receiving data through a fixed frequency channel anywhere in the country.

 Traffic Light, Traffic Light Control, DARC, RDS, GPS, Geographic Location Information

Description

A traffic signal control data transmit and receive instrument and implementation using localized low power FM additional information broadcast}

1 is an exemplary view showing the overall implementation of the proposed traffic light control signal transmitting device unit and the receiving device unit.

2 is an exemplary view of a traffic light generally used.

3 is an example of installation of a current traffic light in the standard viewed from one direction.

4 is a block diagram of a device for transmitting a traffic light control signal of the present invention and a signal lamp.

5 is a detailed block diagram of a traffic light control signal transmitting device unit.

6 is a configuration diagram of a device for receiving a traffic light control signal.

7 is a view illustrating arrangement and connection of a traffic light control signal transmitting device.

8 is an exemplary diagram of local transmission of a traffic light control signal.

9 is an example of the data configuration of a traffic light control signal to be used for FM transmission.

10 is a diagram illustrating a data transmission procedure of a traffic light control signal.

Fig. 11 is a diagram showing the configuration of a signal state display unit on the receiving side.

Fig. 12 is a diagram showing still another configuration of the signal state display unit on the receiving side.

13 is an exemplary diagram of signal reception at a receiving side.

Explanation of symbols for the main parts of the drawings

101: traffic signal controller 102: traffic light 103: FM information transmission device block

121: Example of vehicle traveling direction (example of moving from the lower side to the upper side)

122: near-field traffic light in the forward direction 123: far-distance traffic light in the forward direction

132: control signal / information signal of the traffic signal controller

142: Block for converting the control signal and information of the traffic signal controller to additional information data

143: FM additional broadcast signal generator 144: FM radio transmitter

145: transmitting antenna 151: receiving antenna

152: RF receiver 153: FM additional broadcast receiver

154: GPS location information receiver

155: traffic light control signal reading and display unit control including position information

156: receiving side display device

161, 162, 163, 164, 165, 166: Traffic lights S1, S2, S3, S4, S5, S6

167: traffic signal controller 168: FM information transmitting unit

171: Traffic signal FM information transmitter of the intersection of the J11 location

172: traffic signal FM information transmitter of the intersection of J12 location

R11: Output influence range of the traffic signal FM information transmitter at the intersection of the J11 position (receivable range)

R12: Output influence range of the traffic signal FM information transmitter at the intersection of the J12 position (receivable range)

301: red LED (light emitting diode) unit representing a red stop signal

302: yellow LED (light emitting diode) part representing yellow warning signal

303: Green LED (Light Emitting Diode) unit representing green left turn signal

304: green LED (light emitting diode) unit representing a straight signal

305: green LED (light emitting diode) unit representing the right turn signal

306: countdown light emitting diode unit for displaying the remaining time until signal switching

316: character display unit for displaying the characters and schematics of the traffic additional information

407: FM traffic information transmitter 408: example of vehicles entering the intersection and stopping

401, 402, 403, 404: intersection traffic light S1, S2, S3, S4 405, 406: traffic light S5, S6

R412: Receivable range of signal transmitted from FM traffic information transmitter 407 of intersection J412

The present invention relates to an apparatus for transmitting and receiving traffic light control data using FM information broadcasting and an implementation method thereof. The present invention largely controls the part of the device which modulates and transmits the traffic light control data in the form of FM information broadcasting and controls the traffic lights required by the receiver in consideration of its geographical location information and the direction of the FM radio wave from the receiver. A device and method for taking only data and presenting it visually to a user is provided.

The present invention relates to a proposal of local FM additional information broadcasting knowledge using a local small output FM transmission method, rather than a general large output FM transmission as in the conventionally proposed FM additional information broadcasting method.

Due to the recent economic development, due to the wide spread of vehicles, urban traffic volume has increased and many roads have been constructed for vehicle traffic, and many intersections between roads and roads have occurred.

All roads are equipped with numerous traffic lights, and the traffic signal controller is configured to efficiently control each traffic light in order to smooth the overall traffic flow of the road.

However, a traffic light installed on a general road or at an intersection where roads intersect is often impossible to recognize because some or all of the signals are hidden due to factors such as roadside trees. Alternatively, a traffic light may be blocked by another large vehicle stopped around. And, even if there are no obstacles in the surroundings, when the vehicle being driven stops under a traffic light, or when the sun is in front when the sun's altitude is low, the sunlight is incident at an angle similar to that of the traffic light. The driver is in a situation where the signals of the traffic lights cannot be visually identified at all.

In order to solve these problems, the general method of arranging the branches of trees is regular. In the case of intersection, one traffic light is installed at the position just before the intersection based on the direction of vehicle entry. Later, there is a way to install another traffic light across the intersection.

However, even if you remove obstacles around the road and install additional visible lights in front of the intersection, if the vehicle is high enough to cover the traffic lights in front of you, or if the view is extremely limited due to bad weather such as fog or heavy rain, Or, it is a reality that it is impossible to solve a situation in which it is difficult to secure a forward field of view due to the incident of low altitude sunlight.

Another problem is that the driver cannot predict the moment when the signal of the traffic light is switched in advance, so he is not sure whether to proceed in the presence of a progress signal at an intersection, or hesitates or judges that the straight signal will continue. However, there are frequent cases such as changing to a yellow signal at the time of entry into the intersection, which often results in a driver's embarrassment or a contact accident.

In the present invention, in order to solve the problems such as the situation where the driver cannot visually confirm the traffic light signal by the naked eye or the dangerous situation that may be caused by not predicting the timing of the signal changeover, the local small output FM data transmission is performed. The present invention proposes a method of transmitting and receiving traffic information.

An object of the present invention is to provide a means and method for notifying the state of the current traffic signal by using the FM additional broadcasting transmission technology of the digital data operated in conjunction with the traffic controller even in a situation where it is impossible to visually recognize the traffic signal described above. There is.

Another object of the present invention is to use the fixed one frequency channel without changing the receiving channel at the receiver side, while using the fixed frequency of the road currently located at the receiver side from the individual information of multiple intersections and traffic lights on the road It is to provide a means and a method for extracting the information of only the traffic light of the position where the current needs to be recognized in the image and use it properly.

Another object of the present invention is to provide a means for the user to recognize in a quantitative manner by counting down the waiting time until the moment of switching the traffic signal.

Still another object of the present invention is to provide a means and method for transmitting and receiving information on occurrence of an emergency in addition to traffic light information obtained from a traffic signal controller.

According to the present invention, a method for achieving the above objects is applied to the FM additional information broadcasting method which can provide additional services wirelessly, thereby making control data and additional information such as a traffic signal into an FM radio signal, and a small output local FM broadcasting apparatus. The present invention proposes a method for transmitting a PM additional information broadcast and allowing a user to receive traffic signal control data through an appropriate display apparatus by using the FM additional information receiving apparatus.

According to a first aspect of the present invention, there is provided a device for transmitting and receiving a traffic light control signal.

The overall connection configuration including the same as in FIG.

If we look only at the proposed part of the whole block out of this entire block, the transmission of FM traffic information

It can be divided into two parts: the device block and the signal lamp control signal receiving device on the receiving side.

According to a second aspect of the present invention, including a device for transmitting a traffic light control signal proposed

The overall traffic signal system is configured as shown in FIG. The entire system of Figure 4 is a traffic signal

Controller part, the control signal and information signal of the traffic signal controller is transmitted to display the signal

Existing traffic lights (multiple) and traffic signal control data from digital information

After the modulation in the form of FM additional information, the signal is converted into a local small output FM radio signal.

It is comprised by the FM information transmission apparatus which transmits. (Figure 4)

According to a third aspect of the present invention, the traffic light control signal transmitting device block described above in the second aspect is

In order to process the data received from the signal controller into FM additional information signal,

A part for converting, a part for generating the converted data as an FM additional information broadcast signal,

Transmitter for transmitting FM radio wave carrying additional information broadcasting signal, and final radio

It consists of a transmitting antenna that outputs radio waves. (Figure 5)

According to a fourth aspect of the present invention, in the traffic light control signal transmission (transmission) apparatus described above in the third aspect,

The apparatus for receiving the transmitted traffic light control signal is configured as shown in FIG. Its composition is radio

Antenna to receive, radio frequency (RF) receiver for demodulating radio frequency signals, FM

FM additional broadcasting receiver extracting additional broadcasting data, GPS (GPS) location information received

GPS location information receiver, GPS, which accurately extracts the current location of the receiver

Only the traffic information data required by the receiver from the location information and the extracted traffic information

A signal reading and system control unit for controlling a signal to be extracted and output to a display device;

And a display unit for providing a recognizable means to the user. (Figure 6)

According to a fifth aspect of the present invention, there is provided a signal lamp control signal data described above in the third aspect.

FM radio signal strength is not a form of reception in a wide area

Receive only within the non-overlapping range within the range between intersections

It is a local low power level signal with a small output level. And, the above-described FM signal

The frequency channel of the signal used by the generator is the same one frequency anywhere in the country.

In this case, only one channel can be fixed and used at the receiving end. (Figure 8)

According to a sixth aspect of the present invention, there is provided a device for receiving a traffic light control signal proposed in the fourth aspect.

During configuration, the display part can be easily recognized by the user in the form of a traffic light.

Along with the signal display units representing each signal, the remaining time until the signal conversion is displayed

Characters that can print the display or additional information such as additional traffic information or disasters

It has a structure including a display unit. (Fig. 11, Fig. 12)

According to the seventh aspect of the present invention, the traffic light control signal receiving side proposed in the fourth aspect

GPS only information that corresponds to the traffic light you need to be aware of where the recipient is located

It has a way of extracting information accurately using information. (Fig. 9, Fig. 13)

Hereinafter, with reference to the accompanying drawings will be described in more detail with respect to the present invention

As described above in the first aspect of the present invention, the overall connection configuration including the apparatus for transmitting and receiving traffic light control data is as shown in FIG. 1. Looking at the flow of traffic signal control data and the basic role of each component in the overall configuration of Figure 1 as follows.

The traffic light controller 101 primarily serves to control the traffic light 102 in the same manner as the existing method, and the traffic light control data used therein is a block of the FM information transmitting device 103 proposed in the present invention. Configure to function as a transmission. The FM information transmitting apparatus 103 modulates the transmitted traffic light control data in the form of FM additional information data broadcasting, and then transmits a local small output FM radio wave to inform and transmit the data wirelessly. After the FM radio wave is transmitted, the FM signal demodulation and the extraction of the additional information data are performed by the traffic light control signal receiving device 104, and the information corresponding to the information display unit 105 is displayed in a form that can be recognized by the user. The receiving side operation is performed.

Herein, a portion of only transmitting (transmitting) data of the traffic signal controller will be described in more detail with reference to FIG. 4. As described above in the preceding paragraph, the traffic signal controller 131 serves to control a plurality of traffic lights 133 installed at an intersection or a crosswalk, and the control signal and information signal of the traffic signal controller ( 132 is also configured to be delivered to the FM information transmission device 134 at the same time.

Looking at the above only the FM information transmitting device 134 block in more detail as shown in FIG. (Third Feature) The first block receives the traffic signal control data transmitted from the traffic light controller 141 to the traffic control signal data conversion / processing unit 142 and converts the signal to the FM additional information broadcast signal. The signal converted through the processing is synthesized into the actual FM radio signal and transmitted through the FM additional broadcast signal generator 143 through the FM radio transmitter 144 through the radio transmission antenna 145 in the spatial radio signal Is sent (sent).

In this case, the FM additional information broadcasting method that can be used for radio transmission of the FM additional information may use a data ratio channel (hereinafter referred to as DARC) or a radio digital system (hereinafter referred to as RDS) method. You can also use. Alternatively, another modulation method of FM additional information broadcast may be used, and it may be any method capable of modulating digital control data with FM information.

The apparatus for receiving the radio wave signal transmitted from the above-mentioned traffic light control signal transmitting (sending) device is configured as shown in FIG. The FM radio wave received by the antenna 151 undergoes demodulation in the radio frequency (RF) receiver 152 and extracts digital data through the FM additional broadcast receiver 153. The GPS location information receiver 154 also extracts the exact geographical location information of the current recipient separately. The signal reading and system control unit 155 extracts only the information of the front traffic light and other additional information corresponding to the current travel direction from the collected information from the collected information, and the display unit 156 to inform the user of the extracted information. ) Is displayed in the form of a symbol or character that can be recognized by the user.

An example of the actual arrangement of the traffic light control data transmission device and the traffic signal controller proposed in the present invention is shown in FIG. In the case illustrated in FIG. 7, the traffic signal controller 167 includes four traffic lights (161, 162, 163, and 164) installed at one four-way intersection, and two (1, S2, S3, and S4) installed on a crosswalk of the lower road. It is based on controlling the traffic lights (165, 166 respectively). In the actual case, the traffic lights of the crosswalk included here will also be subject to control, but in the example to be described in the present invention, only the viewpoint of the vehicle will be described below. do. Assuming the case illustrated in FIG. 7 described above, the traffic control signal controller controls the six traffic lights and transmits all signal control data related to each traffic light control to the FM information transmitter 168. The FM information transmitter plays a role of transmitting traffic control data and additional information through FM radio waves as described above with reference to FIG. 5. In this case, each FM radio wave transmitting unit does not necessarily acquire data from only one traffic signal controller, but may collect data from multiple traffic signal controllers and transmit a signal.

8 is an exemplary diagram in which a plurality of FM signal lamp control data transmitting devices are installed on a roadway. Each FM signal lamp control data transmitter uses only one predetermined frequency channel. The reason for using only the same frequency channel is to allow the user to use conveniently without having to reset the receiving frequency channel anywhere in the country. In addition, the strength of each transmitter radio signal is based on the use of a local small output radio wave so as not to overlap with the range of the radio wave output from the control signal transmitter such as another FM signal located at an immediate position. For example, the radio wave output of the transmitting device 172 installed at the J12 intersection transmits the radio wave at a level capable of receiving a signal only in the region of R12, which is installed at the intersections of J11, J13, and J22, which are the nearest positions. It is configured under appropriate prior planning so as not to overlap with the influence ranges R11, R13, R22 of the propagation of the fields 171, 173, 175. In this case, the FM signal lamp control data using only the same frequency is transmitted only within the range of the non-overlapping area in various regions, and the data including the information of several signal lamps are simultaneously transmitted at each location. If a data transmission format is proposed and illustrated, it can be configured as shown in FIG. The basic format consists of a header portion 201 informing that the data to be transmitted contains valid traffic light control data and a data portion 202 containing the actual data contents. As an example of the detailed configuration of the data portion, the traffic light individual identification number (ID; index) 203, the geographical position (GPS) information 204 of each traffic light, the signal state data 205 of the current traffic light, and the signal state to be switched next 206, a countdown value 207 indicating the time remaining until switching to the next signal, forward traffic condition information data 208, and error check (CRC) data 209 for checking the error of the data. Can be configured.

The data format illustrated in FIG. 9 is an implementation example, and other additional information required in an actual implementation may be added. In addition, when data corresponding to an emergency situation is received in the data corresponding to the front traffic situation information data unit, it may be configured to receive other emergency information and the like. For example, you might send a message like congestion in a forward intersection accident. The information on the emergency situation corresponds to the peripheral signal interlocking data and the emergency situation data (FIGS. 5 and 146) shown in the upper left of FIG. 5, and may be configured as information input to the traffic signal controller, or traffic control immediately. It may be input to the signal data conversion / processing unit (Figs. 5 and 142).

FIG. 10 is an example of a procedure of transmitting data when the traffic light control data described above with reference to FIG. 9 is transmitted as FM additional information. In the example of FIG. 10, it is assumed that only four traffic lights S1, traffic light S2, traffic light S3, and traffic light S4 are included in the area of the traffic light in charge of the traffic light control data transmitter. First, control data related to the traffic light S1 is sent out, and then control data related to S2, S3, and S4 is sent out. If information is obtained that an emergency situation has occurred, the data corresponding to the situation is transmitted, and then the process returns to the beginning again and repeats the above process. Repeat interval between entire cycle is performed within the level of 100 or 200 milliseconds (ms) at the level of several tens of milliseconds (ms), so that the information can be updated at the receiving side as quickly as possible. Implement to minimize the time synchronization error between the sides.

Among the data repeatedly transmitted at the receiving side, in particular, the geographic location information (GPS) data 204 of the traffic light of FIG. 9 is currently accepted in consideration of its geographic location information and its own traveling direction. Decide whether or not you should, and take only the data for the traffic lights you are referring forward from your location.

Fig. 11 shows an example of a display unit (Figs. 6 and 156) used to display information to be finally output after the process of collecting only the information of the necessary traffic lights at the receiver's position from the data received at the FM signal lamp control signal receiving device side. All drawings. The display device is not necessarily configured in the same manner as in this example, but should be configured to provide a means for the user to easily recognize the state of the traffic light and the main additional information. In the example of Fig. 11, the display portion has light emitting diode (LED) display means (301, 302, 303, 304, and 305, respectively) representing traffic lights such as stop, warning, left turn, straight turn, and right turn, and additionally present signals. There is also a countdown light emitting diode (LED) display means 306 which indicates how many seconds remain before switching to the next signal. Even if the display unit is configured in various situations where the user cannot visually recognize the traffic light in front of the user, the display unit can accurately recognize the current signal state in real time through the reception device and the display unit, and a few seconds remain until the signal switching time is reached. The map can be predicted in advance.

FIG. 12 is an example of another display unit (FIGS. 6 and 156), and a character display unit capable of displaying various symbols or characters in place of a simple light emitting diode (LED) unit (FIGS. 11 and 306) capable of only counting down display. It characterized by having 316. Through the text display unit, the user may visually recognize the remaining time until the next signal change, and when an emergency occurs, the user may directly check the corresponding emergency received by text. In FIG. 12, an emergency situation called congestion occurred due to a forward intersection accident is indicated by text in the drawing.

FIG. 13 illustrates a traffic light directly due to various obstacles in vehicles 408 and 409 which are traveling from the lower direction to the upper direction or waiting for signals in the traffic light system of the intersection and the crossroads of the type illustrated in FIG. It is a figure which illustrated the case where it cannot. Here, S1, S2, S3, S4, S5, and S6 Six traffic lights 401, 402, 403, 404, 405 and 406 are all assumed to be controlled by a single traffic light controller. To send.

In the case of vehicle 1 (408), the traffic light to be referred to at its current location corresponds to S3 (403). For this purpose, the vehicle 1 (408) receives its own location and the direction of travel using the GPS data. Only the data of S3 (403) to be referred to by the traffic light control data is collected and the state of the current signal can be recognized through the display unit as shown in FIG. Further, in case of vehicle 2 409, it is determined that the traffic light to be recognized at the current position and the traveling direction is S6 406 using its own location information, and collects only the data of traffic light S6 406 to collect the data. Alternatively, it is possible to visually recognize the current signal state in front of the display unit as shown in FIG. 12.

As described above, according to the present invention, even when the driver cannot visually recognize the traffic light in front of the vehicle while driving, the vehicle can contribute to traffic safety by providing a means for receiving and displaying the FM traffic light control data in real time. Provide a way.

In addition, in the case of an intersection or the like, it is possible to reduce the installation cost of a traffic light by using only one to install two traffic lights overlapping in the same traveling direction. Furthermore, the FM receiver is not an expensive device. Therefore, when all the vehicles are equipped with the receiver, even if only a transmission device which transmits only traffic light control data to the FM is installed, no expensive and space-consuming traffic lights are installed on the road. It can be more than just a traffic light, resulting in significant cost savings.

In addition, by providing a means for accurately predicting the time to switch to the next signal when the vehicle enters the intersection, etc. can contribute to reducing accidents due to excessive entry or stop at the time of signal switching at the intersection.

In addition, by providing a means of receiving and recognizing the emergency situation of the road ahead or side road in advance to meet the emergency, such as accidents, congestion, traffic control after entering the road to prevent the long-term delay in advance It can also contribute to

Claims (5)

Wireless transmission method of traffic light control data which converts traffic light control data into additional information data, modulates it into radio signals utilizing the method of FM additional information broadcasting, and transmits it in real time A method of configuring a transmission system for implementing the above method and a method of configuring an entire traffic light control data transmission system including an information input and a transmitter for transmitting additional emergency information according to the configuration of the system And how to configure the format of the transmission data A method of constructing and installing a network of traffic light control data transmitting devices such that there is no overlapping area between adjacent transmitting devices by using only one frequency channel in the system and transmitting local small output FM radio waves. After receiving the radio wave signal of the traffic light control data, the FM additional information data is extracted and the geographic position information of the receiving side is used from the information on the plurality of traffic light control signals in the area transmitted from one transmitting apparatus in the transmission system. Using the receiver's current location and direction of travel so that the receiver can only collect the necessary information such as traffic lights Implementation form and display method of the display means for easily recognizing the traffic light control data received by the receiving method to the user

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