JP3677549B2 - Self-luminous road fence system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a self-luminous road fence system applied to a driving support road that improves road traffic safety by using road infrastructure such as a vehicle sensor and an information display board, and an in-vehicle device such as an information providing device or a control device. It is about.
[0002]
[Prior art]
As a technique to prevent collision accidents between pedestrians and vehicles at pedestrian crossings, self-luminous road fences and road signs installed along pedestrian crossings based on sensor information at night are used to cross pedestrians. There is a traffic safety system (for example, Patent Document 1) that emits light in response to alert the driver.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-209929 (3rd page, paragraph 0012, FIG. 1)
[0004]
[Problems to be solved by the invention]
By the way, in the above prior art, since the light emitted from the self-luminous road fence is directed in any direction, when applied to a pedestrian crossing near an intersection, the light reaches the eyes of the driver of the target vehicle, resulting in an obstacle to driving. May interfere with smooth traffic. In addition, the system is limited to operating at night, so it cannot cover daytime accidents. Another problem is that even if the system is operated as it is in the daytime, the light emitted from the roadside is too dark to sufficiently alert the driver.
[0005]
The present invention has been made to solve the above-described problems, and a pedestrian who crosses a pedestrian crossing to a driver of a vehicle who makes a right turn at an intersection without obstructing traffic of the vehicle near the intersection. The purpose is to provide a self-luminous road fence system that works properly even if the brightness around the pedestrian crossing changes.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 is directed to a sensor for detecting a pedestrian or a bicycle passing through a pedestrian crossing , a self-luminous roadway having directivity in light emission, and an input from the sensor. A self-luminous road fence system comprising a control device for controlling the light emission of the road fence, the road fence is a half of the sidewalk on the side where a right turn vehicle passes, In the range from the intersection of the pedestrian crossing, the light emission directionality of the roadway is embedded toward the vehicle waiting for a right turn with respect to the pedestrian crossing, and the control device crosses the sensor in the detection range. When a pedestrian or bicycle crossing is detected on the sidewalk, the road fence is controlled to emit light . By giving directivity to the light emission of the roadway as described above, it is possible to limit the range of the vehicle where the driver is drawn to the light emission. In addition, the installation range of the self-luminous road fence is the side of the sidewalk on the side where the right turn vehicle passes, and the installation area of the self-luminous road fence is the side closer to the intersection of the pedestrian crossing. The side of the sidewalk is easy to catch the eyes of the driver of the vehicle trying to make a right turn. If the installation range is the above half, the installation cost and running of the device can be maintained while maintaining the effect rather than making the whole area along the pedestrian crossing. Costs can be reduced. Further, if it is installed near the intersection of the pedestrian crossing, it is easier to catch the eyes of the driver as it is easier for the driver of the vehicle to make a right turn than the side far from the intersection, so that the driver's attention can be drawn more strongly.
[0007]
In addition , by using the self-luminous road fence as an embedded type, it is possible to prevent the vehicle traveling on the self-luminous road fence from being obstructed as compared with the case of the ground-mounted type. According to a second aspect of the present invention, in any one of the first aspect, the light emission brightness of the self-luminous roadway is switched to a plurality of levels according to the illuminance around the pedestrian crossing, so that the The self-luminous roadway is made to emit light with brightness. With this light emission control, even if the ambient brightness changes during the day and night, it is sufficient to alert the driver and not bright enough to dazzle the driver. Can be emitted.
[0008]
The invention according to claim 3 has the sensor according to claim 1, wherein the sensor detects one or more bicycles or one or more pedestrians as a flashing start timing of the self-luminous road fence, It is characterized in that the flashing end timing of the self-luminous roadway is that both the number of bicycles detected by the sensor and the number of pedestrians after the flashing start timing become zero. By using this timing, even when a plurality of pedestrians and bicycles cross the pedestrian crossing, it is possible to inform the driver of the existence of pedestrians and bicycles without omission. The invention according to claim 4 is characterized in that in any one of claims 1, a sign explaining the meaning of blinking of a road fence is installed in front of an intersection. By installing this sign, the driver can know the meaning of the light emission of the self-luminous road fence before entering the intersection, and can respond more quickly when the self-luminous road fence emits light.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings. FIG. 1 is a schematic plan view of the whole, FIG. 2 is an enlarged view of one self-luminous road fence in FIG. 1, and FIG. 3 illustrates the connection between the self-luminous road fences and the connection between the road fence and the control device. Drawing and FIG. 4 are block diagrams explaining the function of the control apparatus in FIG.
[0010]
In FIG. 1, 1 is a pedestrian crossing, 2 is a pedestrian, 3, 4 and 5 are vehicles, 6 is a control device, 9 is a sign, 10 and 11 are pedestrian sensors, 20 is a self-luminous roadway, 22 is its Shows luminescence.
[0011]
When the pedestrian sensor 10 detects the pedestrian 2, the four self-luminous road fences 20 emit light by signals from the control device 6. The installation direction of each of the four self-luminous road fences 20 is adjusted so that the light emission 22 faces the vehicle 3 waiting for a right turn. Since the light emission of each self-luminous road fence 20 has directivity, it cannot be seen so well that the driver draws attention from the vehicles 4 and 5 that are vehicles other than the vehicle 3 waiting for the right turn. In addition, the four self-luminous road fences 20 can be embedded.
[0012]
The types of the pedestrian sensors 10 and 11 are not particularly limited, but an infrared sensor that detects a heat ray emitted by the pedestrian, an ultrasonic sensor that emits an ultrasonic wave and detects a reflected wave reflected by the road surface or the pedestrian, and a laser beam. A laser sensor that detects a reflected wave that is emitted and reflected by a road surface or a pedestrian, a laser sensor that emits a millimeter wave and detects a reflected wave reflected by a road surface or a pedestrian, and the like may be used.
[0013]
The sign 9 has the meaning of the light emission of the road fence saying “Be careful of pedestrians when the road fence emits light”. Before the vehicle 3 enters the intersection, the sign 9 enters the field of view of the driver of the vehicle 3.
[0014]
In FIG. 2, a light emitter 21 provided on a self-luminous roadway 20 is made of a light emitting element such as an LED, and emits light 22 when electric power is supplied. Alternatively, the light emitter 21 is made of a combination of a light emitting element such as an LED and a mirror that reflects light from the light emitting element. Regardless of the configuration, the direction / range of the light emission 22 is designed to take a predetermined value. The connection terminal 28 takes in electric power from the outside into the self-luminous road fence 20. The connection terminal 29 outputs a part of the electric power taken in from the connection terminal 28 to the outside.
[0015]
The self-light-emitting road fence 20 can be configured to have a solar power generation function. In the case of a configuration having a solar power generation function, the self-light-emitting roadway 20 is added with a solar battery 41, a storage battery 42, and a switch circuit 43. As soon as the solar cell 41 receives an external light and obtains an electromotive force, the solar cell 41 supplies the generated power to the storage battery 42. When power is supplied from the connection terminal 28 to the switch circuit 43, if it is possible to supply more power than that supplied from the connection terminal 28 using the storage battery 42 at that time, the switch circuit 43 replaces the power from the connection terminal 28. Then, the storage battery 42 is used to supply power equivalent to that supplied from the connection terminal 28 to the light emitter 21.
[0016]
In FIG. 3, the self-luminous road fence 20 is cascade-connected from the control device 6 by a connection line 30. In FIG. 4, when the arithmetic device 100 in the control device 6 receives a signal detecting one or more pedestrians or one or more bicycles from the pedestrian sensor 10 or the pedestrian sensor 11, the power supply circuit 101 is self-luminous. Supply of power to the roadside 20 is started. Thereby, the light emission of the four self-light-emitting road fences 20 starts.
[0017]
In the database 103, the relationship between the ambient illuminance and the light emission luminance of the self-luminous road fence 20 appropriate for calling the driver's attention under the illuminance environment, the relationship between the light emission luminance of the self-luminous road fence 20 and the power consumption Is registered. The arithmetic device 100 in the control device 6 calculates the amount of power supplied from the illuminance measured by the illuminance sensor 102 and the data in the database 103 when the power supply circuit 101 supplies power to the self-luminous roadway 20.
[0018]
The arithmetic device 100 in the control device 6 includes the number of pedestrians and the number of bicycles detected by the pedestrian sensor 10 and the pedestrian sensor 11 after the power supply circuit 101 starts supplying power to the self-luminous roadway 20. When all of these become 0, the power supply circuit 101 finishes supplying power to the self-luminous road fence 20. Thereby, the light emission of the four self-light-emitting road fences 20 stops.
[0019]
【The invention's effect】
As described above, according to the present invention, a driver of a vehicle trying to make a right turn attempts to cross a pedestrian crossing by causing a light-emitting self-luminous road fence installed along one half of the pedestrian crossing to emit light. Safety of road traffic can be improved by directing attention to pedestrians and bicycles. By giving directivity to the light emitted from the self-light-emitting roadway, it is possible to avoid misleading the traffic of other vehicles near the intersection other than the vehicle to turn right. In addition, by adjusting the issuance brightness of the self-luminous road fence according to the illuminance near the intersection, even if the surrounding brightness changes, such as during the daytime or at night, the self-luminous road fence has a brightness appropriate for the driver. Has an excellent effect that it is possible to emit light.
[Brief description of the drawings]
FIG. 1 is an overall schematic plan view showing an embodiment of the present invention.
FIG. 2 is an enlarged view of one of the self-luminous road fences in FIG.
FIG. 3 is a diagram for explaining the connection between self-luminous road fences and the connection between the road fence and a control device.
4 is a block diagram illustrating functions of the control device in FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pedestrian crossing 6 Control apparatus 9 Signs 10 and 11 Pedestrian sensor 20 Self-light-emitting road fence 21 Luminescent body 28 and 29 Connection terminal 30 Connection line 41 Solar cell 42 Storage battery 43 Switch circuit 100 Arithmetic unit 101 Power supply circuit 102 Illuminance sensor 103 Database

Claims (4)

A self-luminous road fence having a directivity for light emission, and a control device for controlling light emission of the road fence based on an input from the sensor , a sensor for detecting a pedestrian or bicycle passing through a pedestrian crossing. In the light-emitting road fence system,
The roadway is a pedestrian crossing that is detected by the sensor, on the side of the sidewalk through which a right turn vehicle passes, and in the range from the intersection of the pedestrian crossing, the directionality of light emission of the roadway is Buried toward the vehicle waiting for a right turn at the pedestrian crossing,
The self-luminous road fence system , wherein the control device controls the road fence to emit light when a crossing of a pedestrian or a bicycle is detected at a pedestrian crossing in which the sensor is a detection range .   2. The self-luminous road fence is caused to emit light at an appropriate luminance according to the surrounding illuminance by switching the light emission luminance of the self-luminous road fence to a plurality of levels according to the illuminance around the pedestrian crossing. Self-luminous road fence system.   It has a sensor, and when the sensor detects one or more bicycles or one or more pedestrians, the flashing start timing of the self-luminous road fence is set, and the number of bicycles detected by the sensor after the flashing start timing and walking The self-luminous road fence system according to claim 1, wherein the flashing end timing of the self-luminous road fence is determined to be 0 for both the number of persons.   The self-luminous road fence system according to claim 1, wherein a sign explaining the meaning of the blinking of the road fence is installed in front of the intersection.

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