KR100720673B1 - Traffic signal and road/road-surface signpost system of base rfid - Google Patents

Abstract

According to the present invention, the RFID tag in which traffic information is stored is installed on a road, and thus, the driver reads the traffic information received by the reader mounted on the traffic vehicle, and provides the driver with safer and faster traffic information. It is advantageous for timely and accurate traffic safety information acquisition, and it is related to RFID based traffic signal and road / road marking notification system that enables to obtain necessary traffic information at any time by using car dashboard. A plurality of RFID tags each storing traffic information suitable for road conditions; A reader attached to the vehicle and wirelessly reading the RFID tag; It relates to an RFID-based traffic signal and road / road marking notification system, characterized in that it comprises an instrument panel for analyzing and outputting the traffic information of the RFID tag read by the reader.

Roads, traffic signals, RFID tags,

Description

RAF-based traffic signal and road / road marking notification system {TRAFFIC SIGNAL AND ROAD / ROAD-SURFACE SIGNPOST SYSTEM OF BASE RFID}

1 is a diagram illustrating an RFID tag of a traffic stability information road sign according to a first embodiment of an RFID-based traffic signal and road / road sign notification system according to the present invention;

2 is a diagram illustrating an RFID tag in a state in which only a road number is set according to the first embodiment of the present invention;

3 is a diagram showing an RFID tag composed of road information and an ID according to a first embodiment of the present invention;

4 is a diagram illustrating an information analysis algorithm of an RFID tag according to a first embodiment of an RFID-based traffic signal and road / road marking notification system according to the present invention;

FIG. 5 is a diagram illustrating a recognition range of an RFID tag when a lane field is used in a diagram in which an RFID of the present invention is installed;

6 is a diagram illustrating a general cover command of the road marking;

7 is a diagram illustrating a wrong temporary cover installation,

8 is a view showing a temporary cover command of the road marking;

9 is a diagram illustrating a road number assignment and a signal indicator according to a second embodiment of an RFID-based traffic signal and road / road marking notification system according to the present invention;

10 is a view showing a traffic information signal display RFID tag according to a second embodiment of the RFID-based traffic signal and road / road marking notification system of the present invention,

11 is a view showing a signal display traffic information field according to a second embodiment of the present invention;

12 illustrates an instrument panel mounted on a vehicle of a user.

The present invention installs an RFID tag on the road to inform the position of road signals, signs, crosswalks, etc., and acquires the RFID tag information by using an RFID tag reader installed in a vehicle. The present invention relates to an RFID-based traffic signal and a road / road marking notification system capable of transmitting traffic safety information to a driver.

Currently, the function and quantity of automobiles have developed remarkably, but the traffic safety devices are mostly dependent on one traffic safety sign.

These traffic safety signs are usually marked on both sides of the road or on the road surface, so that the driver hardly utilizes traffic safety information, especially when driving on roads or at night.

Road traffic safety devices currently in use include traffic lights, road markings and road signs. These devices have limitations in installation due to problems such as size, price, aesthetics, and management. There is a problem in obtaining information.

That is, there are cases where signs and road information are missed, and there is a problem in obtaining traffic information of a traffic light due to a large car (bus / truck) or sunlight that passes in advance when passing a traffic light.

In addition, when the driver wants traffic information, it cannot be obtained immediately, and at night, almost all devices except for traffic lights are useless.

An object of the present invention for solving the above problems, the RFID-based traffic signal and road so that the traffic information of the RFID tag attached to the road is received by the reader mounted on the traffic vehicle and confirmed in the driver's instrument panel / To provide a road sign notification system.

An object as described above is a plurality of RFID tags are attached on the road at equal intervals, each of which stores a unique code number; A reader attached to the vehicle and wirelessly receiving a unique code number of the RFID tag; Receives the unique code number of the RFID tag transmitted to the reader, and when the traffic information corresponding to the unique code number is changed, it is wirelessly received from the web server and stored, and the traffic information corresponding to the unique code number is stored. And the instrument panel for outputting the data analyzed and processed on the screen, and the instrument panel of the vehicle passing the road outputs the traffic information corresponding to the RFID tag unique code number or sends the traffic information to the web server. It is achieved by the RFID-based traffic signal and road / road marking notification system, characterized in that by transmitting the return to the desired traffic status information to inform the user of the situation of the road.

In addition, according to the present invention, the RFID tag is preferably a passive RFID tag.

In addition, according to the present invention, the traffic information stored in the RFID tag is preferably data indicating the road sign.

In addition, according to the present invention, the RFID tag is preferably configured to include a road number, ID, lane number, a plurality of the traffic information.

In addition, according to the present invention, the road number has an up line and a value and an down line value, and the road number value of the down line preferably has a value obtained by taking the binary operator NOT of the road number value of the up line.

In addition, according to the present invention, the start value of the ID is set to 0 to indicate the start of the road, it is preferable that the RFID tag with the ID value of 0 does not have traffic information.

In addition, according to the present invention, the RFID tag is preferably installed so that the ID value increases along the driving direction of the vehicle.

According to the present invention, it is preferable that the RFID tag is an active RFID tag.

In addition, according to the present invention, the traffic information stored in the RFID tag is preferably data indicating the traffic signal display.

In addition, according to the present invention, the RFID tag is preferably configured to include a road number, ID, lane number, traffic information.

In addition, according to the present invention, it is preferable that different road numbers are used between roads affected by the traffic signal.

In addition, according to the present invention, among the traffic information of the RFID tag, the prescribed speed value is specified in every section of the road, and all traffic information except the prescribed speed value is preferably valid only in a certain section.

In addition, according to the present invention, it is preferable that the instrument panel preferentially displays a predetermined high priority traffic information.

In addition, according to the present invention, it is preferable that the instrument panel generates a specific warning sound at the same time to inform the emergency of the road.

In addition, according to the present invention, it is preferable that the voice service is divided into a plurality of stages and services within a range desired by the driver.

Hereinafter, an RFID-based traffic signal and a road / road marking notification system according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 12.

1 is a diagram showing an RFID tag of a traffic stability information road sign according to the first embodiment of the RFID-based traffic signal and road / road marking notification system of the present invention, Figure 2 is a first embodiment of the present invention Figure is a view showing the RFID tag in the state set only the road number according.

3 is a diagram illustrating an RFID tag composed of road information and an ID according to a first embodiment of the present invention, and FIG. 4 is a first embodiment of an RFID-based traffic signal and road / road marking notification system according to the present invention. A diagram illustrating an information analysis algorithm of an RFID tag according to an example.

FIG. 5 is a diagram illustrating a recognition range of an RFID tag when a lane field is used in a diagram in which an RFID of the present invention is installed, and FIG. 6 is a diagram illustrating a general cover command of a road marking.

FIG. 7 is a diagram illustrating a wrong temporary cover installation, and FIG. 8 is a diagram illustrating a temporary cover command of a road cover.

9 is a diagram illustrating a road number assignment and a signal indicator according to a second embodiment of the RFID-based traffic signal and road / road marking notification system according to the present invention, and FIG. 10 is a RFID-based traffic signal according to the present invention. And a traffic information signal display RFID tag according to a second embodiment of the road / road marking notification system.

FIG. 11 is a diagram illustrating a signal display traffic information field according to a second embodiment of the present invention, and FIG. 12 is a diagram illustrating an instrument panel mounted on a vehicle of a user.

The RFID-based traffic signal and road / road marking notification system of the present invention analyzes traffic information of an RFID tag attached to a road, a reader attached to a vehicle, and a reader for reading the RFID tag and a RFID tag read by the reader. It is configured to include an instrument panel for outputting.

In addition, the traffic information output by the instrument panel may be managed on the web server by wireless communication.
In addition, the expression of traffic information read from the instrument panel, the unique code number read by the reader from the RFID tag placed on the road received from the instrument panel and the unique code number and the corresponding traffic information stored in the instrument panel By matching, the instrument panel is simply expressed by omitting a series of processes until the instrument panel reads out traffic information on the corresponding road.

1 to 8 illustrate a data configuration diagram of an RFID tag according to a first embodiment of an RFID-based traffic signal and road / road marking notification system according to the present invention.

The RFID tag 10 of the first embodiment is characterized by consisting of data for road markings.

In addition, the road marking traffic information according to the first embodiment provides the driver with information such as pedestrian crossing position, road safety speed, construction section, and straight / left turn prohibition using a passive RFID tag.

The data constituting the RFID tag 10 includes a road number, an ID, a lane number, and a plurality of traffic information.

The road number is a virtual number for identification of the RFID tag 10 together with the ID and is composed of 8 bits. The road numbers 1 to 127 are assigned to the up line and 128 to 254 are assigned to the down line. And the road number of the down line has the value of the binary operator NOT of the up line in order to clearly distinguish between the up line and the down line of the same road. That is, if the road number of the up line is 15 (0x0F), the road number of the down line is 240 (0xF0) which is ?? (0x0F). This minimizes system malfunction due to data transmission errors.

And, by assigning the road number to 8-bit and installs the RFID tag 10 so that there is no overlapping road number when several roads meet at the intersection.

The ID 12 is a virtual number for identification of the RFID tag 10 together with the road number and is composed of 16 bits. The ID value 0 of the RFID tag 10 is a tag indicating the start of the road and does not have traffic information. In addition, 1 to 65533 (0xFFFD) indicate a general information of traffic information, ID value 65534 (0xFFFE) is assigned to the RFID tag for the temporary sign, and 65535 (0xFFFF) is assigned to the ID value of the RFID tag for signal processing.

 As described above, the RFID tag road is classified using the road number, but the tag information obtained while the vehicle moves from the point A to the point B on the road divided by the center line as shown in FIG. 2 is not only the information about the road 234 but also the road 21 Also read the information.

In this case, the RFID tag analysis system does not know which number of road information should be accepted.

Therefore, the ID is added to the road number to extract only the RFID tag information of the corresponding road exactly.

The detailed description is the same as in FIG. 3. That is, in installing the traffic information RFID tag, the tag is installed while increasing the ID value in the driving direction of the vehicle. That is, the RFID tag whose ID is increased while the road number is the same is valid tag information.

As shown in FIG. 3, when the vehicle moves from the A point to the B point on the road where the RFID tag is installed, the order of the RFID tags read by the reader of the vehicle is 21-41, 234-81, ... 21-38.

Then, the RFID tag information thus read is analyzed in the queue of the analysis system as shown in the algorithm of FIG. The queue is empty when the vehicle enters the road. The traffic information of the 21-41 RFID tag that is read first is discarded and only the identification number of the tag is stored in the queue. The second read 234-81 tag is then compared with the queued identification numbers. The second tag is also invalid because the 21st road number stored in the queue and the 234th road number itself are wrong. So, just like the first, only the identification number is stored in the queue.

 So far, two identification numbers have been stored in the queue and no valid traffic information has been obtained. The third read 21-40 tag is also compared to the identifiers of the queue. There are 21-41 in the queue, but the ID is greater than 40, making it invalid. So just discard the contents and store only the identifier in the queue. 234-82 is read fourth. This is compared to 234-81 in the queue, where 234-82 is selected as a valid RFID tag. If it finds a valid tag like this, it accepts the traffic information in the RFID tag, emptyes the queue, saves the current valid identifier, and repeats the same process as above.

 Assigning the ID value of the RFID tag When the number 65533 is reached, if the value of 1,2, ...

 The queue length of the analysis system suggests 256. If the queue is full, the queue is deleted first from the first stored identifier.

The lane number is composed of 8 bits. Lane numbers should be used as necessary, consisting of spare fields. In order to use the lane number, when installing the RFID tag as shown in Fig. 5A, it should be recognized only within the lane range.

 Lane number has a value from 0, and value 0 means one-way road. The value 1 is the first lane of the road with the center line. Number n is lane n of the road. A value of 255 indicates all lanes. In addition, when the lane number is 0, the driving of the one-way road may be detected by checking the ID value of the tag.

The traffic information is configured by pairing variable length variables of an 8-bit command field. In addition, only the information storage length of the RFID tag has n traffic information sets.

 The road sign traffic information provides the driver with information such as pedestrian crossing position, blast furnace safety speed, construction section, and prohibition of straight / left turn, using a passive RFID tag with ID values 1 (0x0001) to 65534 (0xFFFE).

If you look at the traffic information such as road signs, general signs such as caution signs, regulatory signs, indication signs, speed limit, pedestrian crossing, school zone, speed bumps, no entry, road information, no change in speed, no entry, road construction, accident It can be divided into temporary signs such as occurrence, speeding, temporary pedestrian crossing, and change of temporary road width.

 The generic label is a tag whose ID value is 1 (0x0001) to 65535 (0xFFFD) and can have n instruction sets. One instruction set consists of an 8-bit instruction and a variable byte variable. And all the distance units to be used in the variable are 10m and the speed unit is 1Km / H.

The warning signs, regulatory signs, and indication signs are signs prescribed by the Korea Highway Traffic Safety Administration Authority. The traffic information is displayed in pictures and texts to the driver by the RFID traffic information analysis system. Has a total of 3 byte variables. The first two bytes of the variable indicate the sign number (as determined by the Korea Highway Traffic Safety Authority), and the first byte indicates the effective distance of the sign. In other words, if the distance value is 3, it is valid for 30m. If the distance value is 0, it has a default value.

 The specified speed has a variable specified speed value of 1 byte in command 2 (0x02). The value of the variable is 70, which means the specified speed 70. And the command without valid distance like command speed command of command 2 maintains the current speed value until the next speed command. The variables of the school zone instruction include the remaining distance from the position of the RFID tag to the start point of the school zone and the effective distance value at which the school zone ends.

 In this way, the instruction set of the general mark can be configured as shown in FIG.

 The first byte of the road information indicates the length of the character string. It is also possible to display a character string within 256 such as "toward Busan" and "a rest stop before 3 km." The character of the string is used to determine the byte length of the string by determining either Unicode of 2 bytes or 4 bytes.

The traffic information RFID tag of the general cover has a value of ID numbers 1 (0x0001) to 65535 (0xFFFD) and can make 255 instruction sets of instructions 1 (0x01) to 255 (0xFF).

In addition, the 255 instruction sets of the temporary cover map instructions 1 (0x01) to 255 (0xFF) whose ID number is 65534 (0xFFFE) can be made. The reason for assigning only one 65534 (0xFFFE) temporary sign ID value is to recognize the temporary sign as a valid sign without affecting the general sign ID system fixed on the road.

If temporary signs 21-45 are installed between 21-42 and 21-43 where the general signs 21-41, 21-42, 21-43, ... are installed as shown in FIG. Marks 21-43 21-44 and 21-45 will be recognized as invalid tags. Therefore, the processor is designed as shown in FIG. 4 so that both the general tag and the temporary tag are valid by fixing the temporary cover ID to 65534 (0xFFFE).

 The regulation speed change order is used to temporarily change the regulation speed due to road problems such as road construction. The instruction for changing the speed limit is 1 (0x01), and the variable is 2 bytes in total including the 1 byte speed and the effective distance of 1 byte.

The temporary speed change can be made only up to 255, the maximum distance of 2550m. At the point where the effective distance of the temporary regulation speed change ends, the speed value before the regulation speed change is changed. In addition, if there is a general speed change sign during the change to the temporary speed limit, the value is restored.

 The temporary cover commands are made as shown in FIG.

 The general lane of the same lane number and direction of entry within the effective distance of the temporary entry prohibited sign shall be invalidated.

 In this way, the general number instruction set and the temporary mark instruction set can be made by using the road number and ID of the passive RFID tag, and the driver can provide timely traffic safety information.

9 to 11 illustrate a data configuration diagram of an RFID tag according to a second embodiment of an RFID-based traffic signal and road / road marking notification system according to the present invention, wherein the RFID tag of the second embodiment is a traffic signal display. It is characterized by consisting of data for.

 Unlike the road marking system, the signal display system must inform the signal that changes every moment, so it must use an active RFID tag. And the radio wave of signal indicator can transmit information from 50 meters to 70 meters in radius. Signals are usually used at intersections, so there are no overlapping road numbers at intersections.

 FIG. 9 is a diagram illustrating a propagation radius of a signal display active RFID tag to be installed in a signal and virtual road number assignment for an optimal signal display operation.

9A shows how severe the signal overlap region of the signal signal is when the signal effective radius of four roads affected by the signal indicator is shown among the eight roads.

 If road a and road d use the same road number (No. 33) among the roads affected by the signal indicator as shown in Fig. B, great confusion will occur.

Therefore, the same road number cannot be used between roads affected by the signal as shown in Figure B.

 Using the same road number on a road that is not affected by the signal, as shown in Figure C, affects the operation of the system, but after passing through the intersection, it may receive a signal from the signal. In addition, as shown in D, all the roads that meet at the intersection can be configured differently to form a complete system.

 As shown in FIG. 10, the instruction set of the signal indicator has one traffic information without distinguishing between the instruction and the variable unlike the road marking.

In addition, the traffic information of the signal indicator is composed of a total of 2 bytes as shown in FIG.

 Bit 0, 'Operation status of beeper' indicates whether signal is in normal operation. Bits 1, 2 and 3 indicate the type of signal. Currently, the signals used in Korea are alarm, vehicle 3 color signal, and vehicle 4 color signal. Bit 4 shows On / Off of the red light, bit 5 shows On / Off of the yellow light, bit 6 shows On / Off of the left turn arrow, and bit 7 shows On / Off of the blue light. The right turn signal, which is not found in general signals, is added to bit 8 and 9 to induce pedestrians to walk more safely.

 The traffic safety RFID tag information is valid only for a certain section except for the designated speed which is designated in every section of the road.

Take the school zone of instruction 0x03 in the general cover instruction set as an example.If the RFID tag instruction read to the analyzer is a school zone and the distance to the starting point is 200m and the effective distance is 500m, the analyzer reads the RFID tag. After passing through the point 500m from the reading point is the information that should be erased. On the contrary, although the regulated speed may change, there is no clearing section.

In order for the analyzer to delete the RFID tag information at the appropriate time, the moving distance of the vehicle must be always available. Other methods may include using IDs of time or traffic information instead of distances, but the reliability of the information or management problems occur a lot. So for a good analysis system, you need to get the distance traveled from the car. Then, the traffic safety RFID tag information analysis system always stores only valid traffic information.

In addition, the analysis system may store two or more pieces of valid calibration stability information. As shown in the instrument panel of FIG. 12 (the position or the expression design method may be changed), the amount of information that the driver can see is limited. Therefore, prioritize and display traffic safety information as shown below.

˚1: Temporary cover order

˚2: Signal display command

˚3: No entry, speed bumps, school zone orders

˚4 Priority: Caution Sign, Regulatory Sign, Indication Sign, Step Report

˚5 first: other orders

In this way, high priority information is displayed on the instrument cluster. If the analyzer has a valid intermittent command and a stepped walk command, the intermittent command is displayed on the instrument cluster.

The regulated speed is always displayed on the instrument cluster for the driver to see at any time. In addition, most preliminary cover orders often inform of emergency on the road, such as traffic accidents or road changes due to construction. In this case, it sounds like a specific warning sound, allowing the driver to see the instrument cluster.

 When the traffic information is serviced by voice, there is a slight difference from the method of displaying the instrument panel. As shown in the instrument panel, it is not necessary to calculate the effective section of the RFID tag by hand. This is because the information is delivered to the driver at the moment the RFID tag is recognized.

For example, if the RFID tag command read from the analyzer is a school zone and the distance to the start point is 200m and the effective distance is 500m, the moment the analyzer reads this RFID tag, Voice service and delete the contents of the traffic information.

Voice service has the great advantage that the driver can get information without distractions while driving, but if the driver keeps the information he already knows, it can become a noise and interfere with driving. Thus, in the case of the voice service, the service range is divided into several steps as shown in the following table, and the driver can perform the service within the desired range.

step Service contents Stage 1 No service Tier 2 Urgent service only Tier 3 Contents in specific areas such as Level 2, speed bumps and school zones 4 steps Including 2, 3 levels, Caution, Regulatory, Indication 5 steps All contents service

Many application services using information obtained from RFID tags are also possible. Warning that you are driving 100Km / h on a road with a regulated speed of 70 km / h. "You are driving faster than 30 km / h. It is dangerous." Voice speed is 50Km / h. "

As described in detail above, the RFID-based traffic signal and road / road marking notification system of the present invention has an RFID tag storing traffic information installed on a road, and analyzes the traffic information received by a reader mounted on a traffic vehicle. By providing a safer and faster traffic information to the driver by reading in, it is advantageous for the driver to obtain accurate traffic safety information in a timely manner, and it is possible to obtain the necessary traffic information at any time using the car dashboard regardless of day or night.

In addition, since the RFID-based traffic signal and road / road sign notification system of the present invention only needs to modify the contents of the RFID tag when the traffic information is changed, various traffic information can be input in one RFID tag, so that the system is installed, managed, and maintained. Is convenient.

In the above description, the technical idea of the RFID-based traffic signal and road / road marking system according to the present invention has been described together with the accompanying drawings, but this is by way of example and not by way of limitation. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

Claims (15)

A plurality of RFID tags attached on the road at equal intervals and storing respective unique code numbers; A reader attached to the vehicle and wirelessly receiving a unique code number of the RFID tag; Receives the unique code number of the RFID tag transmitted to the reader, and when the traffic information corresponding to the unique code number is changed, it is wirelessly received from the web server and stored, and the traffic information corresponding to the unique code number is stored. And the instrument panel for outputting the data analyzed and processed on the screen, and the instrument panel of the vehicle passing the road outputs the traffic information corresponding to the RFID tag unique code number or sends the traffic information to the web server. RFID-based traffic signal and road / road sign notification system, characterized in that to inform the user of the road conditions by receiving and return to the desired traffic situation information. The method of claim 1, The RFID tag is a RFID-based traffic signal and road / road marking notification system, characterized in that the passive RFID tag. The method of claim 1, Traffic information and road / road marking notification system based on the RFID, characterized in that the traffic information stored in the RFID tag is data indicating the road marking. The method of claim 3, wherein The RFID tag is a road number, ID, lane number, RFID-based traffic signal and road / road marking notification system, characterized in that comprises a plurality of traffic information. The method of claim 4, wherein The road number has an up line and a value and a down line value, and the road number value of the down line has a value which takes a binary operator NOT of the up number of the up line. system. The method of claim 4, wherein The start value of the ID is set to 0 to inform the start of the road, and the RFID tag with the ID value of 0 does not have traffic information, RFID-based traffic signal and road / road marking notification system. The method of claim 6, The RFID tag is an RFID-based traffic signal and road / road marking notification system, characterized in that the ID value is installed to increase along the driving direction of the vehicle. The method of claim 1, The RFID tag is an RFID-based traffic signal and road / road marking notification system, characterized in that the active RFID tag. The method of claim 8, The traffic information stored in the RFID tag is an RFID-based traffic signal and road / road sign notification system, characterized in that the data indicating the traffic signal display. The method of claim 8, The RFID tag comprises a road number, ID, lane number, traffic information RFID-based traffic signal and road / road marking notification system. The method of claim 8, RFID-based traffic signal and road / road sign notification system, characterized in that different road numbers are used between the road affected by the traffic signal. The method of claim 8, The regulation speed value among the traffic information of the RFID tag is designated in every section of the road, and all traffic information except the regulation speed value is valid only in a certain section, the RFID based traffic signal and road / road marking notification system . The method of claim 1, The instrument panel is based on a predetermined high priority traffic information, characterized in that the RFID-based traffic signal and road / road marking notification system. The method of claim 1, The instrument panel is a RFID-based traffic signal and road / road marking notification system, characterized in that for providing a voice service to generate a specific warning sound at the same time to notify the emergency occurred on the road. The method of claim 14, The voice service is a RFID-based traffic signal and road / road marking notification system, characterized in that the service is divided into a plurality of stages within the range desired by the driver.

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