JP2003272087A - Safe driving support system and road surface sign applicable to this system and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel safe driving support system for particularly inexpensively constructing a system in a travel support system (AHS) for supporting safer driving of a driver by previously providing a front road state for a vehicle. <P>SOLUTION: This safe driving support system 1 is a road surface sign 2 constructed by paint 11 by blending a reflecting base material 13 such as glass beads GB by 25% or more as infrastructure maintenance being road side information support maintenance, and is characterized in that on-vehicle equipment comprises an electromagnetic wave transceiver 3, an image analyzer 4, and a notice device 5, and supports driving of the vehicle V by issuing information and a warning to the driver of the vehicle V according to a state after analyzing a reflected wave by receiving a signal wave reflected by the reflecting base material 13 by emitting an infrared ray converted into a pulse signal to the road surface sign 2 from the vehicle V. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving assistance system (AHS) for providing a driver of a vehicle with road conditions ahead of the vehicle in advance to support safer driving of the vehicle, and more particularly to a reflective vehicle. The road surface marking such as white line is constructed with the paint containing the material, and the vehicle is irradiated with infrared rays,
The present invention relates to a novel safe driving support system that can detect the reflected wave and efficiently recognize the road shape and the like.

[0002]

BACKGROUND OF THE INVENTION Traffic accidents occurring in Japan are about 85 per year.
The number of accidents and the number of injuries are both increasing year by year. Approximately 75% of traffic accidents are caused by human error of the driver, that is, delay of driver's discovery or error of driver's operation / judgment. Therefore, the Ministry of Land, Infrastructure, Transport and Tourism is conducting research and development on how to eliminate such human error and implement preventive measures before a traffic accident occurs. Generally, this is a driving assistance road system (AHS; Advanced Cruise-as).
sist Highway System), which uses information and communication technology to support the driver in real time through cooperation between roads and vehicles. It is called Intelligent Transport System (ITS). It is one of nine fields of development. By the way, in ITS,
It also includes an automatic toll collection system (ETC: Electronic Toll Collection System) that is currently being introduced on highways and the like.

Explaining the basic structure of the AHS currently being devised, as information support equipment on the road side, that is, so-called infrastructure development, information on the road side such as obstacles on the road and freezing condition of the road surface is collected. Sensors (for example, road condition grasp sensor, road condition grasp sensor, etc.), a roadside information processing device that processes information obtained from these sensors, and a road-vehicle communication device that transmits the processed information to the vehicle side. To be done. On the other hand, the vehicle receives the transmitted signal,
A control unit is provided to provide information and alarms to the driver, and forcibly operate the vehicle depending on the situation to automatically avoid danger. In addition to such equipment, for example, it is considered to embed a lane marker that emits magnetism or radio waves on the road surface and mount a sensor on the vehicle side to detect this, in order to prevent the vehicle from deviating from the lane. It is considered that the AHS will be constructed by organically connecting these according to the road conditions and the like.

However, such a normal AHS has the following problems. First of all, it costs a considerable amount of money to install information support equipment on the road side, that is, equipment for collecting the road side information and sending it to the vehicle, such as sensors, roadside information processing equipment, roadside-vehicle communication equipment, etc. There was a problem. In addition, when a lane marker or the like is buried in the road surface, enormous work and time are required, and further, there is a problem that the cost is further increased.

Further, even if the infrastructure on the road side can be carried out as a public project, the equipment on the vehicle side is left to the free will of the vehicle owner, and there is concern about the extent to which it will spread. In particular, since the cost of the on-vehicle equipment and the effect of the system are still unclear, it is considered that it will take a certain amount of time for the general diffusion of the on-vehicle equipment. By the way, even with navigation systems that are currently in practical use, it is said that the penetration rate is about 30% so far, and it has not reached the target of 50%, and it will take a long time to clear it. It is considered. Also the normal A
In HS, even if such a roadside with a high degree of publicity is prepared, it can only be used by vehicles equipped with in-vehicle equipment, so that social fairness is lacking. was there.

Further, conventionally, an attempt has been made to photograph and recognize a white line with a camera, but this method has a problem that weather conditions and lighting conditions are limited. That is, it is difficult to recognize the white line when it is raining or when fog is generated, or when traveling at night or in a tunnel. Of course, millimeter wave radar, laser radar, etc. may be used as the ones that are not easily affected by rain and fog, but in this case, other performances such as spatial resolution are inferior to those of the camera. There was a limit to improving the recognition accuracy of road conditions by developing only equipment.

[0007]

[Technical subject that has been attempted to be developed] The present invention has been made in view of such a background, and it is possible to utilize the road marking originally constructed on a road as an information support facility (infrastructure development) on the road side. The cost of the system has been reduced as much as possible, and the road marking (paint) has been reviewed along with the on-vehicle maintenance, and the development of a new safe driving support system that allows both sides to recognize the road condition with high accuracy is attempted. It is a thing.

[0008]

[Means for Solving the Problems] That is, a safe driving support system according to claim 1 comprises road-side information support maintenance and vehicle-mounted equipment mounted on a vehicle and capable of detecting information from the information support maintenance. , A driving support road system that allows the vehicle to grasp the road conditions ahead, and the information support maintenance on the road side is road marking constructed with a reflective base material, while The on-vehicle equipment includes an electromagnetic wave transmission / reception device, an image analysis device, and a notification device, and the on-vehicle equipment on the vehicle side emits an electromagnetic wave to a road marking and receives an electromagnetic wave reflected from a reflective base material. In addition, after the reflected wave is further analyzed, information or warning is given to the driver of the vehicle or the operation of the vehicle is supported according to the situation. According to the present invention, the road marking such as the white line originally marked on the road surface is utilized as the infrastructure maintenance which is the information support facility on the road side, so that the infrastructure maintenance can be constructed at low cost. That is, in this system, normal AHS
The devices that were considered necessary for collecting the roadside information and sending it to the vehicle (sensors, roadside information processing device,
Road-to-vehicle communication device) is unnecessary. In addition, since it is not necessary to embed many lane markers and the like on the traveling road surface, the system construction cost can be further reduced. Further, in order to recognize the road condition, it is possible to analyze only reflected waves such as infrared rays emitted from the vehicle, so that the analysis process can be completed in a short time.

Further, in the safe driving support system according to claim 2, in addition to the requirements according to claim 1, the road marking is
It is characterized in that the reflective base material is formed by a paint containing 25% or more of the base material. According to the present invention, since the road marking is formed with the coating material containing the reflective base material in an amount of 25% or more, the road marking itself has excellent visibility even in rainy weather or at night when the visibility is poor. Therefore, even a driver who is not equipped with an on-vehicle equipment such as an electromagnetic wave transmitter / receiver can benefit from safe driving by this highly visible road marking, and contributes to the overall reduction of traffic accidents. In addition, a safe driving support system that reflects electromagnetic waves with high efficiency can be specifically established, and road shapes and the like can be recognized with high accuracy.

Furthermore, the safe driving support system according to claim 3 is characterized in that, in addition to the requirements according to claim 1 or 2, the electromagnetic waves emitted from the vehicle are pulse signals. It is a thing. According to the present invention, for example, when irradiating infrared rays from a vehicle, even in the daytime when the infrared rays become natural light and are radiated from all places, by extracting only the pulsed reflected waves from the received infrared rays. It enables quick and accurate analysis.

The road marking applicable to the safe driving support system according to claim 4 reflects the electromagnetic wave emitted from the vehicle, and the reflected wave allows the shape and condition of the road ahead of the vehicle to be transmitted to the vehicle in advance. In such a road marking, the road marking is characterized in that it is formed to have a reflecting base material so that the electromagnetic waves emitted from the vehicle can be reflected with high efficiency. According to the present invention, a road marking that efficiently reflects electromagnetic waves such as infrared rays can be formed, and road-to-vehicle communication using this can be performed.

The road marking applicable to the safe driving support system according to claim 5 is formed by a paint in which a reflective base material is blended in an amount of 25% or more, in addition to the requirements of claim 4. It is characterized by that. According to the present invention, since the visibility of the road marking itself is improved, even a driver who is not equipped with in-vehicle equipment can easily recognize the road shape, pedestrian crossing, speed limit, etc. in the rain, at night, etc. You can benefit from driving. Therefore, with highly visible road markings,
It is possible to reduce traffic accidents irrespective of whether the electromagnetic wave transmitter / receiver is equipped or not.

The road marking applicable to the safe driving support system according to claim 6 is characterized in that, in addition to the requirements according to claim 4 or 5, the road marking has an uneven portion formed on the surface. It is a thing. According to the present invention, even if the road marking is wet with rainwater or the like, the convex portion can be projected from the water surface, and the visibility of the road marking can be secured.

According to a seventh aspect of the present invention, in the road marking construction method, the electromagnetic wave emitted from the vehicle is reflected, and the reflected wave allows the shape and condition of the road ahead of the vehicle to be transmitted to the vehicle in advance. When forming on the road surface,
This sign is characterized in that it is formed to have a reflective base material so that the electromagnetic waves emitted from the vehicle can be reflected with high efficiency. According to the present invention, a road marking that efficiently reflects electromagnetic waves such as infrared rays can be formed, and road-to-vehicle communication using this can be performed.

The construction method of the road marking according to claim 8 is, in addition to the requirements according to claim 7 ,:
It is characterized in that the reflective base material is formed by a paint containing 25% or more of the base material. According to the present invention, it is possible to construct a road marking that is more visible than general road markings. Therefore, even a driver who does not have equipment for transmitting and receiving electromagnetic waves in a vehicle can benefit from safe driving by this highly visible road marking.

The construction method of the road marking according to claim 9 is that in addition to the requirements of claim 8, the road marking is
It is characterized by being coded according to the formation state of the reflective base material. According to the present invention, it is possible to add attached information such as a situation of a front intersection and a distance to a front curve to the symbolized road marking, and the road marking not only describes the shape of the road but also various other information. Can be provided to the traveling vehicle.

Further, the construction method of the road marking according to claim 10 is characterized in that, in addition to the requirements of claim 7, 8 or 9, the road marking is formed to have unevenness on the surface. It is a thing. According to the present invention, even if a water film is stretched over the road marking, for example, in rainy weather, a part of the road marking, that is, a convex portion projects from the water film, and the visibility of the road marking can be secured.

In addition to the requirements of claim 10, the road marking construction method according to claim 11 is such that, in the road marking, the boundary line of the uneven portion provided on the surface is opposed to the traveling vehicle. Thus, it is characterized in that it is formed in a somewhat inclined state. According to the present invention, since the boundary line of the uneven portion of the road marking is formed obliquely so as to face the vehicle, the step surface of the uneven portion is formed in a partition shape or a standing wall shape with respect to the vehicle. The recurrence reflection can be further promoted on the step surface.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the illustrated embodiments. In the description, the road marking 2 of the present invention will be described together with the safe driving support system 1 of the present invention, and then an example of the construction device 20 of the road marking 2 will be described, followed by the construction method of the road marking of the present invention. explain. The safe driving support system 1 of the present invention is for supporting the safe driving of the traveling vehicle V, and is mainly a support level for recognizing the shape of the road and issuing a warning to the driver (driver) when necessary. However, the support provided by the system is not limited to the level at this stage, and the system may provide driving (operation) assistance such as steering of the vehicle V and brake control. Alternatively, the system may completely perform the processes from information collection to driving operation. The vehicle V supported by this system is not limited to a general four-wheeled vehicle, but includes a large vehicle, a special vehicle, a two-wheeled vehicle, or the like.

The safe driving support system 1 of the present invention irradiates electromagnetic waves such as infrared rays from the vehicle V onto a road marking 2 such as a white line constructed with a paint containing a reflective base material 13 such as glass beads GB. It receives the reflected wave from the reflective base material 13, analyzes it, and recognizes the road shape. Therefore, as shown in FIG. 1 as an example, this system includes a road marking 2 as information support equipment (infrastructure) on the road side, an electromagnetic wave transmitting / receiving device 3, an image analysis device 4, and a notification device as equipment on the vehicle V side. 5 and 5. Hereinafter, each component of this system will be described.

First, the road marking 2 will be described. The road markings 2 are mainly road markings such as a center line, pedestrian crossing, and speed limit markings written on the road surface GL such as asphalt and concrete, and most of them are white or yellow. The road marking 2 is a binder having a fluidity in a molten state, a plasticizer,
It is formed by applying a mixture of an aggregate 12 and a reflective base material 13 to a paint 11 containing a filler, a pigment, etc., on a road surface GL (construction surface), and then solidifying with cooling.

As the binder, for example, a heat melting type (softening point 90 to 100 ° C.) petroleum resin is used, but a solvent type
An appropriate type such as a multi-liquid reaction type may be selected. As the plasticizer, vegetable oil, mineral oil, liquid synthetic rubber or the like is used. Furthermore, as the filler, calcium carbonate, talc or the like is used. Furthermore, as pigments for coloring road marking 2, titanium dioxide (white), heat-resistant yellow lead (yellow), etc.
Use a material that matches the desired color. As the aggregate 12,
Although crushed materials such as rocks and fired materials are used, in the present embodiment, as an example, crushed materials of ceramics (particle size 500 to
About 1500 μm) is used.

The reflective substrate 13 is for reflecting electromagnetic waves such as infrared rays emitted from the vehicle with high efficiency.
Here, glass beads GB are applied. The glass bead GB is a small-diameter spherical material made of glass, has a special refractive index (for example, about 1.5 to 2.5), and recursively reflects when light is emitted from the vehicle V. I am trying to cause The glass beads GB have a particle size of 850 to 15
A large particle size of about 00 μm and a particle size of 106 to 850 μm
In this embodiment, the large-diameter glass beads are mixed with the paint 11 in the present embodiment, but the small-particle glass beads may be mixed with the paint 11. . It is also possible to preliminarily adhere small-diameter glass beads around the large-diameter glass beads to form composite glass beads and mix them with the paint 11.

In addition to the glass beads GB, crushed waste glass, crystal, or the like may be applied as the reflective base material 13, or metal particles such as stainless steel or aluminum may be applied. . It is also possible to apply glass beads GB having aluminum vapor deposition or titanium coating on the surface. In the present embodiment, the mixing ratio of the reflective base material 13 (glass beads GB) to the coating material 11 is
As an example, it is set to 25% or more (weight%) to enhance the reflection efficiency of infrared rays emitted from the vehicle V.

Next, the electromagnetic wave transmitting / receiving device 3 will be described. This is mounted on the vehicle V, emits (transmits) electromagnetic waves toward the road marking 2, and receives (receives) electromagnetic waves reflected by the reflective base material 13 of the road marking 2. . At this time, in the present embodiment, infrared rays converted into pulse signals are transmitted and received.
This is for accurately recognizing the road marking 2 day and night. That is, in the case of image recognition by normal infrared irradiation, it is possible to recognize objects with high infrared reflection efficiency at night, but during the daytime, infrared rays are included in many natural light sources, so infrared rays are emitted from all parts. This is because it is difficult to distinguish only the road marking 2 from other structures because it is illuminated.

The electromagnetic waves emitted from the vehicle are not necessarily limited to infrared rays, and ultraviolet rays (ultraviolet laser) or the like can be applied. Further, in the present embodiment, the infrared signal is modulated by converting it into a pulse signal, but the present invention is not necessarily limited to this. Amplitude modulation, frequency modulation, transfer modulation, etc. are performed to include other infrared rays (included in natural light). It is possible to distinguish it from infrared rays. Further, the electromagnetic wave transmitting / receiving device 3 does not have to be configured integrally with the transmitting side and the receiving side, and the transmitting side and the receiving side may be configured separately. Incidentally, a CCD camera or the like can be applied to receive the reflected infrared rays.

Next, the image analysis device 4 will be described. This is also mounted on the vehicle V, and analyzes the road shape and the like by the reflected wave from the reflective base material 13. In the present embodiment, infrared rays converted into pulse signals are transmitted and received, and the image analysis device 4 cuts received waves other than this signal as noise. As a result, only the target infrared rays, which have been converted into pulse signals, are subjected to data processing so that information such as road shape can be obtained in a short time. Next, the notification device 4 will be described. This is also mounted on the vehicle V and can give information and warnings to the operator. In the embodiment shown in FIG. 1,
Although it is illustrated that the information and the like are provided to the operator by the screen display, the notification may be made by voice, or both the screen and the voice may be made at the same time.

Since the present system supports safe driving by using the road markings 2 such as white lines as described above, there is an advantage that the infrastructure maintenance cost and the cost of the entire system can be kept low as compared with the normal AHS. Further, the road marking 2 is indispensable to the road, and there is an advantage that the infrastructure development including the road marking 2 as a constituent element can be performed once at the time of road restoration (maintenance). By the way, in normal AHS, infrastructure development and road maintenance are basically different tasks,
It requires a lot of time and construction. Further, since the road marking 2 in which the reflective base material 13 such as the glass beads GB having a special refractive index is mixed has better visibility than the ordinary road marking, it does not have an on-vehicle equipment such as the electromagnetic wave transmitting / receiving device 3. It can also encourage the driver to drive safely. This is particularly effective in preventing traffic accidents at night, when it is raining, in heavy fog, etc., and contributes to preventing traffic accidents in society as a whole.

The safe driving support system 1 and the road marking 2 of the present invention have the above basic structure,
Hereinafter, a construction device 20 capable of forming such a road marking 2
An example will be described. The construction device 20 is provided with a center line (width 1
5 cm), pedestrian crossing (width 45 cm), etc., which is a material for the road marking 2, such as paint 11 (solvent type, water-based, heat-melting type, multi-liquid reaction type, etc.).
As shown in FIG. 3, a so-called manual type, which is a screwed system that enables efficient construction work, will be described. In FIG. 2, the construction device 20 is on the left side.
The forward direction is defined as the traveling direction and the right side is defined as the backward direction.

The construction device 20 includes a frame 21 formed by appropriately combining metal members, a handle 22 at the front upper end, wheels 23 at four positions on both sides of the lower end, and a gas cylinder 24 above the front wheel 23. Hopper 2 near the center
It consists of 5. Further, the slitter 2 is provided below the hopper 25.
Although not shown, a burner for heating the hopper 25, the slitter 26 and the like is provided facing these members. Hereinafter, various members constituting the construction device 20 will be briefly described.

The hopper 25 is a bucket-shaped container for containing the paint 11 which is a raw material for the road marking 2, and is made of an appropriate metal material so that the paint 11 can be stored in a molten state by being heated by a gas burner. Then, as shown in the enlarged view of FIG. 2, an opening for discharging the paint 11 is formed at the lower rear end, and the wall surface on the front side reaching the opening is formed as a slope descending rearward so that the paint 11 is opened. It is configured to lead to.

Next, the slitter 26 will be described. The slitter 26 is a mechanism for discharging the paint 11, and the film thickness adjusting plate 2
7, an edge plate 28 and a shutter 29. The edge plate 28 is a rectangular metal plate-shaped plate member that is formed by cutting out the corners at both ends of one side, and has a hexagonal shape as an example. The longitudinal dimension of the edge plate 28 is as shown in FIG. It is set longer than the front-back dimension of the opening at 25. Then, the two edge plates 28 are attached to both sides of the outer wall of the opening of the hopper 25 in a state of protruding from the lower end of the hopper 25. Since the lower surface of the edge plate 28 comes into contact with the road surface GL and is easily worn, it is preferable to replace the edge plate 28 by brazing a metal having a particularly high hardness.

On the rear surface of the hopper 25, the film thickness adjusting plate 27 is sandwiched between the two edge plates 28.
It is equipped with. The film thickness adjusting plate 27 is, for example, made by cutting a member having an L-shaped cross section from a steel material. Therefore, the sectional shape of the road marking 2 is determined by the road surface GL, the film thickness adjusting plate 27 and the two edge plates 28.

Next, the shutter 29 will be described. The shutter 29 is a plate-like member for opening and closing the opening of the hopper 25, as shown in FIG. 3, is provided slidably in the front-rear direction so as to cover the entire opening, and is appropriately operated by a lever 30 to crank the crank. By operating the mechanism, it slides back and forth to open and close the opening. Also, the shutter 29
In order to make the discharge of the paint 11 to the rear smooth, a slope that bends in the middle and descends to the rear is formed. In the present embodiment, the screwed type construction device 20 has been described as an example, but a spray type spraying the paint 11 on the road surface GL or a so-called paint type coating mode using a paint roller or the like is also applicable. It is possible. Incidentally, regarding the spray-type construction device, JP-A-10-219621 “Self-luminous road marking material, self-luminous road marking using the same, and construction method thereof” is referred to.

An example of the construction apparatus 20 is constructed as described above, and the construction method of the road marking of the present invention using this construction apparatus will be described below. First, at a construction site, the heat-melting type paint 11 is heated and melted in advance in a melting furnace provided on a truck bed or the like. Then, for example, when a white line such as a center line is drawn, the road surface GL that is a construction surface is marked, and further a primer is sprayed. Next, the molten coating material 11 is charged into the hopper 25 of the construction device 20 from a melting furnace provided on a truck bed or the like. At this time, the gas supplied from the gas cylinder 24 is burned by the gas burner, and the outer wall of the hopper 25 and the slitter 26 are heated by this heat, and the hopper 25 is heated.
The molten state is kept until all the paint 11 in the inside is used up.

When the construction device 20 is exposed to the road surface GL, the lower part of the hopper 25 is, as shown in FIG. 3A, two edge plates attached to both sides of the outer wall of the opening. The bottom surface of 28 is in contact with the road surface GL. When the shutter 30 is slid forward by operating the lever 30 and the opening of the hopper 25 is opened (see FIG. 3B), the paint 11 in the hopper 25 is discharged from here and hits the road surface GL. Contact.

Then, when the operator holds the handle 22 and moves it downward (while guiding), the coating device 11 is applied to the road surface GL as shown in FIG. 3B. When the paint 11 is applied to the road surface GL, the width dimension of the paint 11 is determined by the two edge plates 28, and the construction thickness (film thickness) is determined by the film thickness adjusting plate 27.
After that, the paint 11 hardens as the temperature decreases and the road marking 2 such as the center line is formed (see FIG. 1).

Here, the vehicle V is indicated by various road markings 2.
An example of information that can be transmitted to the user will be described. First, when the electromagnetic wave transmitting / receiving device 3 detects the center line as the road marking 2, it can recognize the shape of the road, and can recognize that the host vehicle is likely to stick out the lane or that the vehicle has already deviated from the lane. . By the way, it is considered that such lane departure prevention and warning can be detected particularly accurately when a white line is formed in the center of the road and the roadside belt. Further, by detecting a pedestrian crossing as the road marking 2, it can be recognized that the pedestrian crossing is approaching forward. Incidentally, in order to recognize the pedestrian crossing, it is also possible to recognize it from the rhombus-shaped road markings (indicating that the pedestrian crossing is ahead) painted on the road surface GL. Furthermore, by detecting the speed limit markings painted on the road surface GL,
It is possible to recognize the speed limit and how much the own vehicle is over the speed limit. Further, by detecting an inverted triangular road marking (indicating a front priority road) painted on the road surface, it is possible to recognize that the front merges (intersects) with the priority road. It is also possible to detect the marking line of the parking lot by the electromagnetic wave transmitting / receiving device 3.

[0039]

Other Embodiments The present invention has the above-described embodiments as one basic technical idea, but the following modifications are possible. That is, in the basic embodiment described above, the road marking 2 is formed (painted) on the road surface GL with the coating material 11 containing the glass beads GB (reflective base material 13) having a special reflectance. In this case, the reflective base material 13 is applied to the road marking 2 in a uniform state in which the coating density is substantially constant. However, the reflective base material 13 does not necessarily have to be evenly scattered on the road marking 2, and for example, the reflective base material 13 may be scattered with distinction between sparse and dense, or the reflective substrate 13 may be scattered depending on the location (part) of the road marking 2. It is possible to clearly distinguish the application and non-application of the material 13. Specifically, as an example, as shown in FIGS. 5 (a) and 5 (b), the reflective base material 13 is sprinkled in the form of a bar code on the road marking 2, and by such a method, the road marking 2 Symbolization is possible.

Incidentally, as a construction device 20 for constructing such a road marking 2, for example, as shown in FIG.
After applying 1, the spreader 31 which can spread the reflective base material 13 from above is provided. In this case, paint 1
It is possible to make the particle size of the reflective base material 13 (glass beads GB) mixed in 1 and the particle size of the reflective base material 13 scattered from above the paint 11 different. Of course, if the desired effect (the visibility and symbolization of the road marking 2) is obtained, the reflective base material 13 is not preliminarily blended with the paint 11 and the paint 11
You can just spray it from above.

When the road marking 2 is symbolized as described above, not only the shape of the road is detected by the road marking 2, but also the symbol of the reflective base material 13 scattered on the road marking 2 ( The pattern) enables exchange of other attached information between road vehicles. The attached information here is
For example, “up to XX junction, □□ km left”, distance to front curve and size (shape) of curve, distance to front downhill and gradient thereof can be mentioned. In addition, the situation of the next intersection, for example, the next intersection is a three-way intersection or a five-way intersection, an intersection without a traffic light, an intersection with a pedestrian crossing, an intersection where a priority road crosses in front, etc. Information is given.
Further, it is possible to add information on nearby facilities. Incidentally, FIG. 5 shows that the front is an intersection of five-forked roads, and FIG. 6 shows that the front is an intersection of priority roads.

To symbolize the road marking 2, use FIG.
As shown in (a) and (b), the reflective base material 13 is not necessarily scattered in the form of a bar code, and for example, as shown in FIG.
It is possible to change the thickness of the line on which the reflective base material 13 is scattered as shown in (d), or to change the number of lines of the reflective base material 13 as shown in FIGS. 5 (e) and (f). Is. Further, for example, as shown in FIGS. 6A to 6C, the scattering portion of the reflective base material 13 in the road marking 2 may be changed, or FIG.
As shown in (f) to (f), it is possible to change the line type on which the reflective base material 13 is scattered. Of course, the reflection base material 13 can be formed not only in the line (line segment) shape described here, but also in the form of a figure or characters to be symbolized.

Further, in the above-described basic embodiment, the road marking 2 has a substantially flat surface.
However, for example, when rainwater collects on the road marking 2 in the case of rain, the road marking 2 is covered with a water film, the reflection efficiency of the road marking 2 is poor, and the visibility from the vehicle is reduced. Conceivable. For this reason, the surface of the road marking 2 is made uneven, and even in rainy weather, the concave portion plays the role of a drainage groove, and a part of the road marking 2 (convex portion) is always projected onto the water film. It is possible to secure Here, the concavo-convex portion formed on the road marking 2 is referred to as 35 (see FIG. 7).

Further, in this case, not only is the boundary line (partition line) of the uneven portion 35 formed directly beside the road marking 2, but as an example, as shown in FIGS. It can be tilted somewhat so as to face the traveling vehicle V when viewed from above. In this case, since the step surface 36 of the uneven portion 35 is raised in a partition shape with respect to the vehicle V, the recursive reflection is effectively performed on the step surface 36. 7A and 7B, the uneven portion 35 of the road marking 2 is formed at a constant angle α with respect to the side of the road.

Incidentally, when forming such an uneven portion 35 on the surface of the road marking 2, for example, the reflection base material 13 is used.
The spraying outlets are provided so as to be slightly oblique to the traveling direction (the formation direction of the road marking 2), and the boundary line between the concave portion and the convex portion is always formed obliquely. Then, for example, the construction (spraying) speed is changed between the concave portion and the convex portion (the concave portion is fast and the convex portion is slow)
Therefore, the thickness of the road marking 2 can be made different. Of course, it is possible to apply the coating material 11 only over the convex portion to form the uneven portion 35 as a whole, or after applying the coating material 11 substantially flat, only the upper side of the portion corresponding to the concave portion is shaved, It is also possible to form the uneven portion 35 as a whole. It should be noted that the reason why the step surface 36 is inclined with respect to the road marking 2 is that the vehicle V does not run on the road marking 2 but rather runs along a center line drawn on the side of the vehicle V or the like. is there.

Further, for example, when the road marking 2 is provided so as to be sandwiched between roads having two lanes on each side, the vehicle V travels in the same direction on both sides of the road marking 2, and which lane the vehicle travels on. It is desirable that the V light be reflected again. Therefore, in such a case, the concavo-convex portion 35 of the road marking 2 can be formed in a V-shape in plan view as shown in FIG. 7C as an example.

[0047]

According to the present invention, it is possible to prevent traffic accidents mainly caused by human error, such as drowsy driving and erroneous recognition due to poor visibility. In addition, in a society that is aging in the future, it can effectively support the driving of a person whose cognitive ability has declined. Further, the present invention utilizes the road marking 2 such as a white line formed on the road surface GL as information support equipment (infrastructure development) on the road side.
It can be maintained relatively easily compared to normal AHS. In addition, since the road markings 2 such as white lines are drawn on most roads, the infrastructure of this system can be developed at the same time as this repair, and road maintenance can be arranged at a lower cost. Further, the road marking 2 formed of the coating material 11 containing the reflective base material 13 such as the glass beads GB in an amount of 25% or more, even in an environment where the visibility is not good,
Since it has high visibility, it contributes to the safe driving of drivers who do not have on-board equipment for AHS.

In addition to the construction of the road marking 2 with a coating material containing the reflective base material 13, the infrared rays emitted from the vehicle V are converted into pulse signals to select only the signal waves reflected from the road marking 2. (Extracted) and can be analyzed, and the road marking 2 can be reliably recognized day or night. Further, for example, the road marking 2 can be symbolized by the scattering pattern of the reflective base material 13, and not only the road shape in front of the road marking 2 can be grasped but other attached information can be added to the road marking 2 to make the vehicle V Can be provided. In addition, by forming the surface of the road marking 2 in a concavo-convex shape, even if a water film is stretched on the road marking 2 in rainy weather, for example, the convex portion can be projected from the water film, and thus the road marking 2 Visibility can be secured. In this case, since the boundary line of the uneven portion 35 of the road marking 2 is formed to be slightly inclined so as to face the vehicle, the step surface 36 of the uneven portion 35 is raised with respect to the vehicle. At 36, the recursive reflection can be performed more effectively.

[Brief description of drawings]

FIG. 1 is a perspective view showing a safe driving support system and a road marking according to the present invention.

FIG. 2 is a side view and a partially enlarged view showing a road marking construction device.

FIG. 3 is an enlarged side cross-sectional view (a) and (b) showing a slitter portion when a road marking is applied, and a perspective view (c) showing the road marking formed on the road surface.

FIG. 4 is a side cross-sectional view (a) showing an enlarged slitter portion of a construction device in which glass beads are sprayed on the road surface after the paint is applied, and a road marking formed on the road surface. It is a perspective view (b).

FIG. 5 is an explanatory view showing various scatter patterns of glass beads for symbolizing a road marking.

FIG. 6 is an explanatory view showing various scatter patterns of glass beads for symbolizing a road marking.

FIG. 7 is a perspective view (a) showing an embodiment of a road marking in which unevenness is formed on the surface and in which the boundary line of the unevenness part is inclined so as to face the vehicle and an enlarged view thereof ( FIG. 6B is an enlarged view of the road marking in which the concave and convex portions are formed in a V shape in plan view, and FIG.

[Explanation of symbols]

1 Safe driving support system 2 road marking 3 Electromagnetic wave transceiver 4 Image analysis device 5 Notification device 11 paint 12 aggregate 13 Reflective substrate 20 Construction equipment 21 frames 22 handle 23 wheels 24 gas cylinders 25 hoppers 26 slitters 27 Film thickness adjustment plate 28 Edge plate 29 shutters 30 levers 31 Spreader 35 uneven part 36 Step surface GB glass beads GL road surface V vehicle

Continued front page    F-term (reference) 2D064 AA05 BA06 CA09 EB26 FA01                       JA02                 5H180 AA01 CC02 CC04 CC24 LL07                       LL08

Claims (11)

[Claims] 1. A vehicle equipped with road-side information support maintenance and vehicle-mounted equipment mounted on a vehicle and capable of detecting information from the information support maintenance, so that the vehicle can grasp the road conditions ahead in advance. In the support road system, as the information support maintenance on the road side, there is a road marking constructed to have a reflective base material, on the other hand, as the vehicle-mounted equipment, an electromagnetic wave transmission and reception device, an image analysis device, A notification device is provided, and the vehicle-mounted equipment on the vehicle side emits electromagnetic waves to the road marking and receives the electromagnetic waves reflected from the reflective base material, and further analyzes the reflected waves, and then the vehicle depending on the situation. A safe driving support system characterized by issuing information and warnings to the driver of the vehicle and supporting the operation of the vehicle. 2. The safe driving support system according to claim 1, wherein the road marking is formed of a paint containing 25% or more of a reflective base material. 3. The safe driving support system according to claim 1, wherein the electromagnetic waves emitted from the vehicle are pulse signals. 4. Reflecting electromagnetic waves emitted from a vehicle,
In the road marking that allows the shape and condition of the road ahead of the vehicle by this reflected wave to be transmitted to the vehicle in advance, the road marking is a reflection base so that the electromagnetic waves emitted from the vehicle can be reflected with high efficiency. A road marking that can be applied to a safe driving support system characterized in that it is formed to have a material. 5. The road marking applicable to the safe driving support system according to claim 4, wherein the road marking is formed of a paint containing 25% or more of a reflective base material. 6. The road marking applicable to the safe driving support system according to claim 4, wherein the road marking has an uneven portion on its surface. 7. Reflecting electromagnetic waves emitted from a vehicle,
When forming a sign on the road surface that enables the shape and condition of the road in front of the vehicle to be transmitted to the vehicle in advance by this reflected wave, this sign makes it possible to reflect the electromagnetic wave emitted from the vehicle with high efficiency. A road marking construction method, characterized in that the road marking is formed so as to have a reflective base material. 8. The method of applying road markings according to claim 7, wherein the road markings are formed by a paint containing 25% or more of a reflective base material. 9. The method of constructing a road marking according to claim 8, wherein the road marking is coded according to a formation state of a reflective base material. 10. The method for constructing a road marking according to claim 7, 8 or 9, wherein the road marking is formed to have unevenness on the surface. 11. The road marking is formed in a somewhat inclined state such that the boundary line of the uneven portion provided on the surface faces the traveling vehicle.
Construction method of the road marking described.