JP2001109990A - Lane marker system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lane marker system by which the setting factors of a road manager are transmitted to the vehicle side and code contents are changed in instant response to temporary contents change in the case of emergency. SOLUTION: The lane marker system is provided with on-vehicle equipment 10 having a storage means where the code written in a lane marker 2 and the contents corresponding to the code are previously set and having a change means for changing the contents corresponding to the code and communication equipment 5 to be arranged on the prescribed travelling route of the vehicle 3. The change means is driven by communication from communication equipment 5 to the vehicle so that the contents of the code are changed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lane marker system installed on a road surface for guiding a vehicle along a predetermined traveling route.

[0002]

2. Description of the Related Art Conventionally, techniques in such a field include:
For example, there is one disclosed in the following literature.

(1) Japanese Patent Application Laid-Open No. H10-104345, "Vehicle Position Detecting Apparatus and Method" (2) the second world confee
rence on intelligent tran
sport system '95 Yokohama
PROCEEDINGS volume III, pp
1069-1074 "The Experiment
s on Lateral and Logngtu
digital Control System in A
RTS "(3) Japanese Unexamined Patent Application Publication No. 10-21493," IC Nail Information Control System "Conventionally, a technology for detecting a relative position of a vehicle with respect to a traveling path to guide the traveling route of the vehicle is known.

[0004] A method of detecting a vehicle position using a magnetic sensor with reference to a position marker set along a track,
A method using an electromagnetic wave disclosed in Japanese Patent Application Laid-Open No. 10-104345 and the like is known.

[0005] This method of detecting the position of a vehicle measures the position of a vehicle in a lane, and is called a position lane marker, in which information such as the maximum speed is written in a lane marker. There is also an information lane marker which reads the information on the vehicle side and uses the information for vehicle control [refer to the above-mentioned prior art document (3)].

FIG. 7 is a schematic diagram of a conventional lane marker system, and FIG. 8 is a block diagram of an in-vehicle device that executes the lane marker system.

As shown in these figures, a lane marker 102 is disposed on a road 101. When a vehicle 103 travels, information on the lane marker 102 is transmitted by electromagnetic waves.
The input code storage unit 111 and the code content storage unit 112 of the on-vehicle device 110 are stored in the display device 113 of the vehicle 103.
Will be displayed.

Also, a dedicated communication line LCX (Leaky C
For example, a method of exchanging road information with a vehicle by a method of extending an axial cable (or the like) along a road has been adopted (see the above-mentioned prior art document (2)).

[0009]

However, the conventional position lane marker described above measures the position of the vehicle, and the information lane marker merely gives the written information to the vehicle.

Further, since the lane markers are embedded in the road along the traveling route of the road, the information stored in the lane markers requires a great deal of labor to rewrite. For example, information had to be rewritten and refilled.

However, refilling requires a great deal of labor in case of extraordinary changes or the like, and is not preferable in terms of cost.

Further, when speed regulation is required due to, for example, a typhoon or disaster, the rewriting takes too much time, and there is a drawback that an emergency response cannot be performed. Some information lane markers use electromagnetic waves to rewrite the written information, but the lane markers can only be rewritten at that location. Etc. could not be given promptly.

[0013] Also, in the case of running restrictions or changing stop lines at festivals or events held in towns and cities, rewriting the information of each lane marker one by one is troublesome and wasteful work.

Furthermore, the method of transmitting emergency information by laying a dedicated communication line has a disadvantage that the amount of information transmission increases for detailed information transmission for each lane.

The present invention eliminates the above-mentioned problems, and does not change the code set in advance in the lane marker and the content corresponding to the code, but changes the content corresponding to the code within a predetermined range along the route of the road. In order to provide a lane marker system that can change the code content in response to the temporary content change in an emergency, by transmitting the specifications of the road manager to the vehicle side by changing the content in the form of a content difference Aim.

[0016]

In order to achieve the above object, the present invention provides: [1] In a lane marker system, a code written in a lane marker and a content corresponding to the code are set in a vehicle-mounted device in advance. An in-vehicle device having a storage unit and a changing unit for changing the content corresponding to the code, and a communication device arranged on a predetermined traveling route of the vehicle, by communication from the communication device to the vehicle side, The content of the code is changed by driving the changing means.

[2] In the lane marker system according to the above [1], the changing means stores a difference from a preset code content and calculates the content of the changed portion to the preset content to calculate the changed content. It is characterized in that it is applied as new code content corresponding to the code.

[3] The lane marker system according to the above [1], wherein a lane marker for checking whether the code content is correctly changed is arranged as the type of the lane marker.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic diagram of a lane marker system capable of changing code contents according to a first embodiment of the present invention, and FIG. 2 is a schematic diagram of a lane marker system capable of changing code contents according to the first embodiment of the present invention. It is a block diagram of the in-vehicle device which performs.

In FIG. 1, 1 is a road, 2 is a lane marker installed on the road 1, 3 is a vehicle, 4 is a receiving device, 5 is a roadside communication device installed in a first communication area, and 6 is a second communication device. A roadside communication device installed in the communication area, 7 is a first code change content applicable section, and 10 is an in-vehicle device that executes a lane marker system that can change the code content installed on the vehicle side.

As shown in FIG. 2, the vehicle-mounted device 10
A vehicle-side receiving device 11 that receives communication from the roadside communication devices 5 and 6, a change-content storage unit 12 that receives communication from the vehicle-side receiving device 11 and stores change contents, and is set in advance by electromagnetic waves from the lane marker 2. A code storage unit 14 for storing an input code 13 stored therein, a code information content storage unit 15 corresponding to a preset code, an operation unit 16 for calculating preset information content and changed content, and storing new code content. And a change code content storage unit 17.

The output signal from the change code content storage unit 17 is notified to the driver by a notification device 18 such as a display device or a sound generation device. Note that, instead of the notification device 18, a vehicle control device may be used to perform automatic control of the vehicle.

Hereinafter, the operation of the lane marker system of the first embodiment in which the code contents can be changed will be described.

First, as shown in FIG. 3, for example, the code "100" of the lane marker 2 is stored in the code information content storage section 15 of the lane marker system of the vehicle 3 at "80 km / h".
/ H "is set in advance. Therefore, the lane marker 2 has the code “10”
"0" is written. At this time, in the in-vehicle device 10 of the vehicle 3, the code “100” is read as the current speed regulation value from the lane marker 2, so the code information content storage unit 15 reads “80 km / h”. .

Vehicle 3 is the first code change content application section 7
When the vehicle enters, predetermined change contents are transmitted to the vehicle-side receiving device 11 of the vehicle 3 from the road-side communication device 5 installed on the side of the road.
Then, as shown in FIG. 4, for example, “−30 km / h”
Is stored in the change storage unit 1 via the vehicle-side receiving device 11.
It is conveyed to 2. Then, on the vehicle side, the operation unit 1 is calculated from “80 km / h” stored in the code information content storage unit 15.
The subtraction “30 km / h” is subtracted by 6 and “5 km / h” is subtracted.
0 km / h ”is stored in the change code content storage unit 17.

Then, this "50 km / h" is recognized by the driver as the maximum speed in the first code change content application section 7, and "50 km / h" is recognized as the first code change content application section 7. It works so that a vehicle is controlled as a regulation value of section 7. Further, the vehicle 3 travels and the second
, The information content of the section is communicated from the second roadside communication device 6. Hereinafter, a regulation value is given to each section in a similar procedure.

As described above, according to the first embodiment, the information written in the lane marker remains unchanged, but the code content corresponding to the code is changed from the beacon to the passing vehicle via the communication device. In other words, since the vehicle itself translates and applies the lane marker information, there is an advantage that even in an emergency, the information can be immediately applied as information suitable for the situation.

Further, since a difference from the original code content is stored, even if a value different in distance to the stop line is stored for each lane marker, for example, it is only necessary to subtract the changed numerical value from that value. There is an advantage.

Furthermore, since communication from the road at a key point is only once and the information of the lane marker only needs to be read and translated, there is no need to extend a communication line antenna over a long section. is there.

In the first embodiment, the number of lane markers is shown to be in the second section with about five lane markers, but the number of lane markers is not limited to this.

In the above description, the control of the maximum speed has been described. However, the present invention may be applied to the distance to the stop line. Furthermore, although it has been described that the information of the second section is provided by the second communication device, the second communication device may issue a communication content of returning to the original stored value.

The widening of the road and the change of the traveling route of the road are not basically targeted because the position of the lane marker itself changes, but can be applied as a temporary measure. The present invention can be applied to a lane marker that notifies a speed regulation value (temporarily changed due to heavy rain, strong wind, an accident, or the like) or a stop line position (temporary change such as traffic regulation at a festival or the like). It is not limited to application. Further, the used code and the contents corresponding to the code may be arbitrarily combined.

Next, a second embodiment of the present invention will be described.

FIG. 5 is a schematic diagram of a lane marker system capable of changing code contents according to a second embodiment of the present invention, and FIG. 6 is a schematic diagram of a lane marker system capable of changing code contents according to a second embodiment of the present invention. It is a block diagram of the in-vehicle device which performs.

In FIG. 5, reference numeral 20 denotes an in-vehicle device for executing a lane marker system capable of changing code contents, 31 a receiving device installed on the road side, 32 a changed portion storage device connected to the receiving device, 34 Is a change confirmation lane marker, and 33 is a connection line between the change location storage device 32 and the change confirmation lane marker 34.

As shown in FIG. 6, the in-vehicle device 20 includes a first receiving device 21, a first change content storage unit 22,
Rewriting unit 23, notification device 24 such as a display device or a sound generation device, content comparison unit 25, second reception device 26, decoding device 27, change confirmation determination unit 28, second change content storage unit 29
It is composed of

The operation of the lane marker system according to the second embodiment of the present invention will be described below. Communication and storage of the change of information to the vehicle when there is a change is the same as in the first embodiment. The differences are as follows.

When the information needs to be changed, the change information is sent from the roadside communication device 5 to the vehicle 3. At the same time, the change information is also sent to the change location storage device 32 via the receiving device 31. A connection line 33 is connected to the change confirmation lane marker 34 from the change location storage device 32. The change confirmation lane marker 34 transmits the information of the change location storage device 32 to the vehicle 3 when the vehicle 3 passes immediately above. The information transmitted to the vehicle 3 is information for checking whether the information transmitted from the roadside communication device 5 is correctly transmitted to the vehicle. The information includes a code to check for changes.

Therefore, the change contents of the first change contents storage unit 22 from the roadside communication device 5 and the second change contents storage unit 2
9 is compared with the changed contents from the changed part storage device 32,
If correct, the change in vehicle 3 has been completed,
This is reported to the driver via the notification device 24. If different, the first change content storage unit 22 of the vehicle 3
Is rewritten to the information of the change confirmation lane marker 34, and the driver is notified of the change in the content via the notification device 24.

As described above, in the second embodiment, even if a change is transmitted to the passing vehicle 3 through a beacon or the like, it is necessary to confirm whether the change has been made. Therefore, in order to remove erroneous transmission due to the influence of beacon failure, peripheral electromagnetic wave abnormality, and the like, a lane marker 34 for confirming whether or not a change has been made is prepared.

As described above, according to the second embodiment, since the change confirmation lane marker 34 only needs to be arranged at a necessary place, there is an advantage that a complicated communication line is not required.

In the second embodiment, since the communication method and the communication distance are different between the beacon and the lane marker, the probability of erroneous transmission of information is different, and it is expected that the probability of erroneous transmission of information is reduced. Is transmitted.

Further, if the change confirmation lane markers are arranged at predetermined intervals, there is an advantage that erroneous information can be corrected for each lane marker and that the vehicle can be run for a short distance. This has the advantage that correct information can be quickly transmitted to the driver, so that accidents and the like can be easily prevented.

The change confirmation lane marker may be provided at a plurality of places instead of one place. Further, when the change information does not fit in one lane marker, a change confirmation lane marker may be continuously arranged so that different change contents can be checked. Further, the connection line may be wireless instead of wired.

It should be noted that the present invention is not limited to the above embodiment, but various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

[0047]

As described above, according to the present invention, the following effects can be obtained.

(A) On the vehicle side, without changing the preset code and the content corresponding to the code, the changed area of the content corresponding to the code is transmitted to the vehicle by the communication means.
By calculating the initial content and the changed content, the code of the changed content is translated in the form of the code and the content corresponding to the code, so that the code can be easily changed.

(B) If the change confirmation lane markers are arranged at predetermined distances, incorrect information can be corrected for each lane marker, and the distance that the vehicle runs can be shortened. This has the advantage that correct information can be quickly transmitted to the driver, so that accidents and the like can be easily prevented.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a lane marker system capable of changing a code content according to a first embodiment of the present invention.

FIG. 2 is a block diagram of an in-vehicle device that executes a lane marker system capable of changing code contents according to the first embodiment of the present invention.

FIG. 3 is a diagram illustrating codes of a code content storage device and code content examples.

FIG. 4 is a diagram showing codes of a change content storage device and code change examples.

FIG. 5 is a schematic diagram of a lane marker system according to a second embodiment of the present invention, in which code contents can be changed.

FIG. 6 is a block diagram of an in-vehicle device that executes a lane marker system capable of changing code contents according to a second embodiment of the present invention.

FIG. 7 is a schematic diagram of a conventional lane marker system.

FIG. 8 is a block diagram of a vehicle-mounted device that executes a conventional lane marker system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Road 2 Lane marker 3 Vehicle 4 Receiving device 5 Roadside communication device installed in first communication area 6 Roadside communication device installed in second communication area 7 First code change content applicable section 10, 20 In-vehicle device 11 Car-side receiving device 12 Change content storage unit 13 Input code 14 Code storage unit 15 Code information content storage unit 16 Operation unit 17 Change code content storage unit 18 Notification device 21 First reception device 22 First change content storage unit 23 Rewrite Unit 24 notification device 25 content comparing unit 26 second receiving device 27 decoding device 28 change confirmation judging unit 29 second change content storage unit 31 receiving device installed on the road side 32 change location storage device 33 connection line 34 change confirmation Lane marker

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G01S 13/91

Claims (3)

[Claims] 1. An on-vehicle device comprising: (a) a storage unit of an on-vehicle device in which a code written in a lane marker, a content corresponding to the code are set in advance, and a change unit for changing the content corresponding to the code; (B) a communication device arranged on a predetermined traveling route of the vehicle, and (c) driving the changing means to change the content of the code by communication from the communication device to the vehicle. A lane marker system. 2. The lane marker system according to claim 1, wherein said changing means stores a difference from a preset code content, calculates a content of a changed portion to the preset content, and stores the difference in said code. A lane marker system characterized by being applied as new corresponding code contents. 3. The lane marker system according to claim 1, wherein a lane marker for checking whether code content has been correctly changed is arranged as the type of the lane marker.