JP6860905B2 - Road reflection type line-of-sight guidance device and road surface reflection type line-of-sight guidance method - Google Patents

Description

The present invention relates to a road surface reflection type line-of-sight guidance device and a road surface reflection type line-of-sight guidance method for irradiating a line-shaped laser beam toward the outside line of a road to perform line marking.

Conventionally, as a line-of-sight guidance device, a device main body that stores a laser light source that irradiates a line-shaped laser beam is installed on a pillar erected on the side of a road, and the line-shaped laser beam is emitted from the upper side to the lower side by this device main body. By irradiating and marking a line along the outer line of the road, the vehicle driver may be made to recognize the outer line of the road even when visibility is impaired such as when snow is accumulated (Patent Document 1).

Japanese Patent Application No. 2016-221617

The vehicle driver can recognize the line marking by the line-of-sight guidance device mainly by the reflected light from the road surface of the line-shaped laser light. Laser light is superior in light directivity and convergence to LED light. Therefore, among the reflected light of the line-shaped laser light reflected on the road surface when the line-shaped laser light is irradiated from above to the road surface below. , The amount of light reflected laterally toward the vehicle driver side is reduced. Therefore, when the line-shaped laser beam is irradiated so that the center position of the line marking is located directly in front of the device main body installation position in the road width direction, the vehicle driver (of the line marking), for example, several tens of meters away from the line marking position. In some cases, the line marking was dark and could not be clearly recognized by the vehicle driver who faces the projected position forward. In this case, it is conceivable to increase the output of the laser light source so that the vehicle driver can clearly recognize the line marking even from a distance. However, considering the influence on the eyes of the vehicle driver, the laser light source is output at a high output. Is not preferable.

The present invention has been made in view of the above circumstances, and is a road surface reflection type line-of-sight guidance device capable of clearly recognizing a line marking even from a distance by a vehicle driver without increasing the output of a laser light source. An object of the present invention is to provide a road surface reflection type line-of-sight guidance method.

The road surface reflection type line-of-sight guidance device according to the present invention
A laser light source that irradiates a line-shaped laser beam so that a line sign is projected on the road surface, and a support that stores the laser light source and stands outside the outside line of the road by an attachment at a predetermined height position. Equipped with the main body of the device to be installed
When the device body is installed on the support by the fixture, the line marking is located on the outside line or near the outside line at a position shifted from the position directly in front of the device body installation position in the road width direction to the side opposite to the traveling direction of the vehicle. traveling of the vehicle at a predetermined angle γ to be projected along the length of the outer line, the optical axis of the line-shaped laser beam with respect to the outer direction only one且obliquely downward from above the road width direction of the outer line Te All of the line-shaped laser light emitted in a triangular shape with an emission angle β toward the opposite direction is irradiated to the position on the side opposite to the vehicle traveling direction, and the reflected light of the line-shaped laser light from the road surface. The line marking is made to be recognized by the vehicle driver.
Further, the road surface reflection type line-of-sight guidance method according to the present invention is
Using a laser light source that irradiates a line-shaped laser beam so that the line marking is projected on the road surface, the vehicle travels from the position directly in front of the installation position of the laser light source on the outer line or in the vicinity of the outer line. as projected along the outer line length direction at a position shifted in a direction opposite direction, one direction only且obliquely downward from the outside of the upper outer line optical axis of the line-shaped laser beam road width direction With respect to the road surface, the entire line-shaped laser beam emitted in a triangular shape with an emission angle β is irradiated to the position on the opposite side of the vehicle traveling direction toward the opposite direction of the vehicle traveling direction at a predetermined angle γ. This is a method of causing a vehicle driver to recognize the line marking by the reflected light of the line-shaped laser beam from the light source.

Here, the outside line is a line that divides the road portion (roadway) through which the vehicle passes and the outside thereof, but the line is drawn not only when such a line is drawn with paint but also with paint. Including the case where it is not (virtual line). The optical axis of the line-shaped laser beam is a straight line connecting the emission center point of the line-shaped laser beam in the laser light source and the center point of the line of the line marking. The vehicle driver facing the projected position of the line marking in front recognizes the line marking mainly by the reflected light from the road surface of the line-shaped laser beam.
According to the above-described configuration of the present invention, the line marking is projected on or near the outer line of the position deviated from the position directly in front of the device main body installation position (laser light source installation position) in the road width direction to the side opposite to the traveling direction of the vehicle. Will be done. The reflected light of the line-shaped laser beam reflected by the road surface at the projection position of the line marking goes to the side opposite to the traveling direction of the vehicle. Therefore, it is possible to increase the amount of reflected light of the line-shaped laser light from the projection position of the line marking toward the side opposite to the traveling direction of the vehicle.

According to the present invention, the reflected light of the line-shaped laser light reflected by the road surface at the projection position of the line marking is directed to the side opposite to the traveling direction of the vehicle, and the line-shaped laser light is directed to the side opposite to the traveling direction of the vehicle. By increasing the amount of reflected light, even if the output of the laser light source is not increased, the vehicle driver who faces the projected position of the line marking in front can make the line marking bright and clear by the reflected light of this line-shaped laser light even from a distance. Can be seen in.

It is a perspective view which shows the road surface reflection type line-of-sight guidance apparatus of embodiment. It is sectional drawing which shows the internal structure of the apparatus main body and a laser light source. It is a side view which shows the state which attached the apparatus main body to a support with a fixture. It is a figure which shows the fixture, the figure (A) is a plan view, and the figure (B) is a side view. It is a schematic diagram which shows the irradiation direction of a line-shaped laser beam, FIG. It is a schematic diagram in the case of irradiating the position directly in front of the road width direction of the main body installation position. It is a figure which shows the angle of the irradiation direction of a line-shaped laser beam, FIG. It is a side view seen from the road width direction. It is a top view which shows the state which the laser light source is installed in the case at the rotation angle θ. It is a figure which shows the state which two laser light sources are installed in the case at the rotation angle θ, the figure (A) is a schematic top view, and FIG. (B) is a schematic cross-sectional view.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the road surface reflection type line-of-sight guidance device 1 of the embodiment is installed on a support column (support) P erected outside the outside line 6 of the road 60, and is directed from above to below the road surface 61. The line-shaped laser beam 51 is irradiated to project the line marking 5 along the outer line 6 of the road 60. Here, the outer line 6 is a line that separates the road 60 portion (roadway) through which the vehicle passes and the outer side thereof, but the line is painted not only when such a line is drawn with paint. Including the case where it is not drawn (virtual line).
As shown in FIG. 2, the road surface reflection type line-of-sight guidance device 1 includes a laser light source 2 that irradiates a line-shaped laser light 51 and an apparatus main body 3 in which the laser light source 2 is housed, as shown in FIG. , The apparatus main body 3 is installed at a predetermined height position of the support column P by the fixture 4.

As shown in FIG. 2, the laser light source 2 irradiates a line-shaped laser beam and projects the line marking 5 onto the irradiated surface (road surface 61). The laser light source 2 has a semiconductor laser element 22, an optical system unit (collimator lens 23, a line beam conversion unit 24), and a circuit 25 for driving the semiconductor laser element 22 housed in an elongated cylindrical housing 21. A laser beam emission port 26 is formed in a circular opening on the tip surface (outlet side end portion). Wiring 28 for power supply and the like is drawn out from the base end 27 of the laser light source 2. Then, the laser light source 2 converts the laser light emitted from the semiconductor laser element 22 into parallel light by the collimator lens 23, converts the parallel light into the line-shaped laser light 51 by the line beam conversion unit 24, and converts the laser light outlet 26 into a line-shaped laser light 51. Irradiate from. The line beam conversion unit 24 can use various means such as a prism lens, a mirror, and a polarizing plate. The line-shaped laser light 51 emitted from the laser light source 2 is emitted at a predetermined emission angle β, and is irradiated in a triangular shape when viewed from the side as shown in FIG. The optical axis 52 of the line-shaped laser light 51 is a straight line connecting the emission center point of the line-shaped laser light 51 of the laser light emitting port 26 of the laser light source 2 and the line center point of the line marking 5 projected on the irradiated surface. Is.

As shown in FIG. 2, the apparatus main body 3 includes a quadrangular box-shaped case 30, and the quadrangular bottom plate 31 of the case 30 is provided with a window portion 32 for emitting the line-shaped laser light 51 of the laser light source 2. Has been done. In this case 30, the laser light source 2 has a laser light emitting port 26 facing the window portion 32 and is in an upright state on the inner surface of the bottom plate 31, and is fixed in a rotation blocking state around the cylindrical axis of the laser light source 2. In the method of fixing the laser light source 2 in the case 30, a fitting portion is formed on the inner surface of the case 30, and a holder holding the laser light source 2 in a rotation blocking state is fitted and fixed in the fitting portion. Not limited to this, various means can be used.

On the outer surface of the bottom plate 31, a pair of rectangular flat plate-shaped brim portions 33 (see also FIG. 3) extending downward are formed with the window portion 32 interposed therebetween. The brim portion 33 blindfolds the line-shaped laser light 51 that shines in the window portion 32 so that it cannot be directly viewed from below. A bulging portion 34 extending outward is formed on the upper portion of two side plates facing one side of the four side plates of the case 30, and a bulging portion 34 is formed on the lower portion of one bulging portion 34 from the side plate. A projecting piece 35 projecting outward is formed. The U-shaped band metal fitting 71 of the fixture 4 is arranged on the lower surface of the bulging portion 34.

As shown in FIGS. 3 and 4, the fixture 4 includes a device mounting bracket 7 for holding the device main body 3, a strut mounting bracket 8 attached to the strut P, and a device mounting bracket 7 and a strut mounting bracket 8, respectively. It is provided with a connecting metal fitting 9 for connecting so that the angle can be adjusted.

The device mounting bracket 7 is composed of a U-shaped band bracket 71 attached to a U-shaped first plate bracket 72 with a nut 73, and the device main body 3 is arranged and fixed in the U-shaped band bracket 71. The U-shaped band metal fitting 71 is arranged on the lower surface of the bulging portion 34 of the case 30 of the apparatus main body 3, and is arranged between the lower surface of one bulging portion 34 and the projecting piece 35. As a result, the device main body 3 is stably fixed to the fixture 4 in a constant posture so as not to fall.

The support column mounting bracket 8 is composed of a U-shaped support 83 for attaching the stainless band metal fitting 81 to the U-shaped second plate metal fitting 82 by tightening and fixing the stainless band metal fitting 81 with bolts 85 and nuts 84. It is fitted to P and fixed. By fixing the stainless band metal fitting 81 to the second plate metal fitting 82 at a different position at 90 degrees, the column mounting bracket 8 can be used not only as a vertically standing column P but also as a horizontally extending horizontal bar. The installation posture of the device main body 3 can be fixed as it is.

The connecting metal fitting 9 includes a pair of first connecting pieces 91 connected to the first plate metal fitting 72 of the device mounting metal fitting 7, and a pair of second connecting pieces 92 connected to the second plate metal fitting 82 of the support column mounting metal fitting 8. The first connecting piece 91 and the second connecting piece 92 are displaced by 90 degrees and extend in opposite directions. The first plate metal fitting 72 and the first connecting piece 91 are connected by a bolt 93 and a nut 94, and by rotating the first plate metal fitting 72 around the bolt 93 and the nut 94, the apparatus main body 3 is moved in the vertical direction. The angle can be adjusted freely. The second plate metal fitting 82 and the second connecting piece 92 are connected by a bolt 95 and a nut 96, and by rotating the second plate metal fitting 82 with the bolt 95 and the nut 96 as a center point, the apparatus main body 3 is moved in the left-right direction. The angle can be adjusted freely by swinging.

Thus, the first plate metal fitting 72 and the first connecting piece 91 form a vertical angle adjusting mechanism (vertical swing mechanism) of the device main body 3, and the second plate metal fitting 82 and the second connecting piece 92 form the device main body. The left-right angle adjustment mechanism (left-right swing mechanism) of 3 is configured. Therefore, the attachment 4 can attach the device main body 3 to the support column P so that the angle can be adjusted in each of the vertical direction and the horizontal direction. By adjusting the angle of the device main body 3 in the vertical direction, the swing width W in the road width direction from the device main body installation position P1 can be set as the irradiation position of the line-shaped laser beam 51 (see FIGS. 1 and 6). By adjusting the angle of the device main body 3 in the left-right direction, the irradiation distance L can be set as the irradiation position of the linear laser beam 51 in the road length direction orthogonal to the road width direction from the device main body installation position P1 (FIGS. 1 and 1). 6). The first plate metal fitting 72 and the first connecting piece 91, and the second plate metal fitting 82 and the second connecting piece 92 are provided with scales 97 and 98 (see FIG. 4) indicating angles, and have a predetermined swing width W and a predetermined. The angle positions γ and α that are the irradiation distance L of can be set. The fixture 4 is not limited to the above configuration, and various configurations can be used in which the angle of the device main body 3 can be adjusted in the vertical and horizontal directions.

With reference to FIG. 1 again, the apparatus main body 3 is attached by the fixture 4 to the installation height H of the support column P standing outside the outer line 6 of the road 60, and is attached to the outer side of the road surface 61 from the upper side to the lower side. The line-shaped laser beam 51 is irradiated toward the line 6 to project the line marking 5 along the outer line 6 of the road 60. The line marking 5 is projected straight on the outer line 6 or in the vicinity of the outer line 6 along the length direction of the outer line 6.

At this time, the device main body 3 of the road surface reflection type line-of-sight guidance device 100 is installed as shown in the schematic view of FIG. 5 (B), and the center position of the line marking 5 is arranged at the position directly in front of the device main body installation position P1 in the road width direction P2. When the line-shaped laser light 51 is irradiated as described above, the reflected light 53 of the line-shaped laser light 51 reflected on the road surface 61 has a large amount of reflected light upward and a large amount of reflected light in the lateral direction toward the vehicle driver side. Less. The vehicle driver recognizes the front line marking 5 mainly by the reflected light from the road surface 61 of the line-shaped laser light 51. Therefore, the line marking 5 may be dark and cannot be clearly recognized by a vehicle driver (a vehicle driver facing the projected position of the line marking 5 in front), for example, several tens of meters away from the line marking 5 position in this case. It was.

Therefore, in the present embodiment, as shown in the schematic view of FIG. 5A, the device main body 3 of the road surface reflection type line-of-sight guidance device 1 is installed, and the optical axis 52 of the linear laser beam 51 is reversed in the traveling direction of the vehicle. By irradiating toward the direction side, the line marking 5 is projected to the position P3 deviated from the position P2 directly in front of the device main body installation position P1 in the road width direction to the side opposite to the traveling direction of the vehicle (see also FIG. 1). ). As a result, the reflected light 53 of the line-shaped laser light 51 reflected by the road surface 61 at the projected position of the line marking 5 goes in the direction opposite to the traveling direction of the vehicle, so that the traveling direction of the vehicle with respect to the projected position of the line marking 5 The amount of reflected light of the linear laser beam 51 heading in the opposite direction can be increased. As a result, even if the output of the laser light source 2 is not increased, the vehicle driver who faces the projected position of the line marking 5 in front can brightly and clearly make the line marking 5 by the reflected light of the line-shaped laser light 51 even from a distance. You can see it.

In this case, in order for the laser light source 2 to irradiate the optical axis 52 of the line-shaped laser light 51 toward the side opposite to the traveling direction of the vehicle at the installation position of the support column P, the posture should be as shown in FIG. The device main body 3 is installed by the angle adjusting mechanism of the fixture 4. That is, the installation height of the laser light source 2 from the road surface 61 is H, the swing width which is the shortest distance from the installation position of the laser light source 2 to the outer line 6 is W, and the road width of the installation position of the laser light source 2 on the outer line 6 is W. When the irradiation distance from the position directly in front of the direction to the center position of the line marking 5 is L (see FIG. 1), the angle γ in the left-right direction of the apparatus main body 3 (see the upper view shown in FIG. 6 (A)). Is set by γ = Atan (L / W), and the vertical angle α of the apparatus main body 3 (see the side view from the road width direction shown in FIG. 6B) is α = Atan. It is set by (L / H).

However, the line of the line marking 5 is projected straight along the outer line 6 at the position P3 (see FIG. 1) deviated from the position P2 directly in front of the device main body installation position P1 in the road width direction to the side opposite to the traveling direction of the vehicle. As described above, the work of installing the device main body 3 and adjusting the position is a very troublesome, time-consuming and time-consuming work. That is, at the predetermined height position (installation height H) of the support column P, the apparatus main body 3 is predetermined to the left and right and up and down so that the irradiation direction of the laser light source 2 is directed to the irradiation position P3 shifted in the direction opposite to the traveling direction of the vehicle. It is necessary to rotate the laser light source 2 around the optical axis 52 so that the line of the line marking 5 is arranged straight along the outer line 6 in a state where the swing is fixed at the angles α and γ. In this case, since the installation position P1 of the laser light source 2 and the irradiation position of the line-shaped laser light 51 (position P3 of the line marking 5) are far apart, the line-shaped laser light can be obtained even by slightly rotating the laser light source 2. At the irradiation position P3 of 51, the direction of the line marking 5 fluctuates greatly.

Therefore, in the present embodiment, in the case of the road 60 traveling on the left side, the laser light source 2 is a position where the line marking 5 is deviated from the position P2 directly in front of the device main body installation position P1 in the road width direction to the side opposite to the traveling direction of the vehicle. The line of the linear laser beam 51 rotates clockwise from the vertically extending vertical position when viewed from the base end 27 side of the laser light source 2 so that it is projected straight along the length direction of the outer line 6 at P3. It is set in advance at a position rotated by an angle θ (see FIG. 7). As described above, the rotation angle θ is θ = Atan (when the installation height from the road surface 61 to the laser light source 2 is H and the swing width which is the shortest distance from the laser light source 2 to the outer line 6 is W. Set as W / H). As a result, when the laser light source 2 is installed at the installation height H and the swing width W, if the laser light source 2 is set at the rotation angle θ, the line-shaped laser light 51 is irradiated at the device main body installation position P1. The line of the line marking 5 can be projected straight along the length direction of the outer line 6 even if the position P3 is shifted from the position P2 directly in front of the road width direction to the position P3 opposite to the traveling direction of the vehicle. Therefore, the installation work of the road surface reflection type line-of-sight guidance device 1 at the installation site can be performed very easily, easily, and quickly.

Then, in the present embodiment, as shown in FIG. 7, in the case 30, the laser light source 2 is in a state in which the apparatus main body 3 is installed on the support column P so that the surface of the bottom plate 31 of the case 30 faces diagonally downward (FIG. 7). 3) When viewed from the base end 27 side of the laser light source 2 with respect to one side of the bottom plate 31 arranged on the lower side or the upper side, the line of the line-shaped laser light 51 extends clockwise from the position described above. The laser light source 2 is installed in advance in a state of being rotated by the rotation angle θ. As a result, the device main body 3 is moved left and right and up and down so that the irradiation direction of the laser light source 2 is directed to the position (irradiation position) P3 shifted to the opposite direction of the traveling direction of the vehicle at the position of the support column P at the installation height H. By swinging and fixing at predetermined angles α and γ, the line of the line marking 5 can be projected straight along the outer line 6 at the position P3 deviated to the side opposite to the traveling direction of the vehicle. Therefore, the installation work of the road surface reflection type line-of-sight guidance device 1 at the installation site can be performed more easily, easily, and more quickly.

The laser light source 2 is set to light or blink the line-shaped laser light 51 when the environment is dark, such as at night or when there is snow. When the line-shaped laser light 51 is blinked, the line indicator 5 naturally blinks, so that the recognition of the line indicator 5 by the vehicle driver can be further enhanced, and the power consumption of the laser light source 2 is also higher than when the laser light source 2 is turned on. Can be reduced.

The installation height of the device main body 3 is preferably set to a low position in consideration of the line-of-sight height (about 1.2 m) of the driver of the passenger vehicle, for example, 5 m or less, preferably 2.5 to 3. If it is installed at a height of 5 m, the vertical angle α of the laser light source 2 becomes large without increasing the irradiation distance L, and the amount of reflected light of the linear laser light 51 that reaches the driver's line of sight of the passenger car is further increased. The vehicle driver can see the line marking 5 brighter and clearer.

Further, two or more apparatus main bodies 3 are installed, or two or a plurality of laser light sources 2 are provided in the apparatus main body 3 (see FIG. 8), and line markings 5 by each laser light source 2 are parallel or overlapped. It may be arranged so as to be projected. In this case, the amount of reflected light of the line-shaped laser light 51 in the direction opposite to the traveling direction of the vehicle is further increased, so that the vehicle driver facing the projected position of the line marking 5 forward is affected by the reflected light of the line-shaped laser light 51. The line marking 5 can be seen brighter and clearer.

1 Road reflection type line-of-sight guidance device 2 Laser light source 3 Device body 4 Mounting tool 5 Line marking 6 Outside line 7 Device mounting bracket 8 Strut mounting bracket 9 Connecting bracket 26 Laser light outlet 27 Laser light source base end 30 Case 31 Bottom plate 32 Window Part 33 Brim part 34 Protruding part 35 Projection piece 51 Line-shaped laser light 52 Optical axis 60 Road 61 Road surface α Vertical angle β Vertical laser light emission angle γ Left-right angle θ Laser light source rotation angle P1 Device body Installation position P2 Directly in front of the road width direction P3 Position shifted to the opposite direction of the vehicle traveling direction (line marking irradiation position)
P support (support)
W Swing width L Irradiation distance

Claims (6)

A laser light source that irradiates a line-shaped laser beam so that a line sign is projected on the road surface, and a support that stores the laser light source and stands outside the outside line of the road by an attachment at a predetermined height position. Equipped with the main body of the device to be installed
When the device body is installed on the support by the fixture, the line marking is located on the outside line or near the outside line at a position shifted from the position directly in front of the device body installation position in the road width direction to the side opposite to the traveling direction of the vehicle. traveling of the vehicle at a predetermined angle γ to be projected along the length of the outer line, the optical axis of the line-shaped laser beam with respect to the outer direction only one且obliquely downward from above the road width direction of the outer line Te All of the line-shaped laser light emitted in a triangular shape with an emission angle β toward the opposite direction is irradiated to the position on the side opposite to the vehicle traveling direction, and the reflected light of the line-shaped laser light from the road surface. A road surface reflection type line-of-sight guidance device having a configuration in which the vehicle driver recognizes the line marking. In the road surface reflection type line-of-sight guidance device according to claim 1.
In the case of a road that runs on the left side,
The laser light source is set at a position where the line of the line-shaped laser light is rotated clockwise by a rotation angle θ from a vertically extending vertical position when viewed from the base end side of the laser light source.
The rotation angle θ is set by θ = Atan (W / H) when the installation height of the laser light source from the road surface is H and the swing width which is the shortest distance from the laser light source to the outside line is W. Type-of-sight guidance device. In the road surface reflection type line-of-sight guidance device according to claim 2.
The main body of the device is provided with a quadrangular box-shaped case, and the quadrangular bottom plate of the case is provided with a window portion for emitting a line-shaped laser beam of a laser light source.
In the case, the laser light source is placed in a state where the device main body is installed on the support so that the emission side end of the line-shaped laser light faces the window and the surface of the bottom plate of the case faces diagonally downward. With respect to one side of the bottom plate arranged on the side or the upper side, when viewed from the base end side of the laser light source, the line of the line-shaped laser light is rotated clockwise by the rotation angle θ from the position extending in the vertical direction. The installed road surface reflection type line-of-sight guidance device. In the road surface reflection type line-of-sight guidance device according to any one of claims 1 to 3.
A road surface reflection type line-of-sight guidance device in which two or more laser light sources are provided in the main body of the device, and line markings by the laser light sources are arranged so as to project them in parallel or in an overlapping manner. In the road surface reflection type line-of-sight guidance device according to any one of claims 1 to 4.
The laser light source is a road surface reflection type line-of-sight guidance device set to blink a linear laser beam. Using a laser light source that irradiates a line-shaped laser beam so that the line marking is projected on the road surface, the vehicle travels from the position directly in front of the installation position of the laser light source on the outer line or in the vicinity of the outer line. as projected along the outer line length direction at a position shifted in a direction opposite direction, one direction only且obliquely downward from the outside of the upper outer line optical axis of the line-shaped laser beam road width direction With respect to the road surface, the entire line-shaped laser beam emitted in a triangular shape with an emission angle β is irradiated to the position on the opposite side of the vehicle traveling direction toward the opposite direction of the vehicle traveling direction at a predetermined angle γ. A road surface reflection type line-of-sight guidance method for causing a vehicle driver to recognize the line marking by the reflected light of the line-shaped laser beam from.

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